WO2022165768A1

WO2022165768A1 - Method and apparatus for transmitting data

Info

Publication number: WO2022165768A1
Application number: PCT/CN2021/075638
Authority: WO
Inventors: 杨军; 宗在峰; 周艳; 周汉; 张冠华
Original assignee: 华为技术有限公司
Priority date: 2021-02-05
Filing date: 2021-02-05
Publication date: 2022-08-11
Also published as: CN116964982A

Abstract

The present application provides a method and apparatus for transmitting data. The method comprises: a first device obtains first indication information, the first indication information being used for indicating synchronous transmission of multiple target data streams; and the first device performs synchronous transmission processing on at least one target data stream in the multiple target data streams at least according to the first indication information, so that a deviation between transmission progress between the multiple target data streams is less than or equal to a first threshold. According to the solution of the present application, the first device performs synchronous transmission processing on the multiple target data streams according to the first indication information, so that the deviation between the transmission progress between the multiple target data streams is less than or equal to the first threshold. When the multiple target data streams are transmitted, compared with the independent transmission of the multiple target data streams without considering the correlation between the target data streams, the user experience can be improved by using the solution of the present application.

Description

Method and apparatus for transmitting data

technical field

The present application relates to the field of communications, and more particularly to a method and apparatus for transmitting data.

Background technique

In virtual reality (VR), augmented reality (AR), mixed reality (MR), multi-camera, tire crane and other scenarios, multiple target data streams that need to be transmitted have content, time Correlation or multi-sensory synchronization requirements, that is, when multiple target data streams are transmitted in such scenarios, a certain synchronization accuracy needs to be met between multiple target data streams. When using the mobile communication technology to transmit multiple target data streams, the multiple target data streams are synchronized at the receiving end by means of buffering, but the effect of this synchronization method is not ideal, resulting in poor user experience. Therefore, when using mobile communication technology to transmit multiple target data streams with content, time correlation or multi-sensory synchronization requirements, how to achieve high-precision synchronization transmission among the multiple target data streams is an urgent problem to be solved.

SUMMARY OF THE INVENTION

The present application provides a method and apparatus for transmitting data, which can realize synchronous transmission of multiple target data streams.

In a first aspect, a method for transmitting data is provided, including the first device acquiring first indication information, where the first indication information is used to indicate synchronous transmission of multiple target data streams; the first device at least according to the first indication information , performing synchronous transmission processing on at least one target data stream among the multiple target data streams, so that the deviation of the transmission progress among the multiple target data streams is less than or equal to the first threshold.

According to the solution of the present application, the first device performs synchronous transmission processing on the multiple target data streams according to the first indication information, so that the deviation of the transmission progress among the multiple target data streams is less than or equal to the first threshold. Compared with when multiple target data streams are transmitted, the multiple target data streams are independently transmitted and the correlation between each target data stream is not considered, and the user experience can be improved by adopting the solution of the present application.

With reference to the first aspect, in some implementations of the first aspect, the deviation of the transmission progress between the multiple target data streams includes one or more of the following: frame numbers of transmission between the multiple target data streams The deviation of the time stamps between the multiple target data streams, the deviation of the time consumed by the multiple target data streams to transmit the preset data amount.

With reference to the first aspect, in some implementations of the first aspect, the first indication information is one, and the first indication information includes identification information of each target data stream in the multiple target data streams; or the There are multiple pieces of first indication information, and the pieces of first indication information are in one-to-one correspondence with multiple target data streams, and each first indication information includes identification information of the corresponding target data stream; wherein, the identification information of the target data stream includes At least one of the following parameters: quintuple information corresponding to the target data flow, information about the quality of service QoS flow identification information corresponding to the target data flow, or information about the QoS flow sub-flow identification information corresponding to the target data flow.

With reference to the first aspect, in some implementations of the first aspect, the multiple target data streams belong to a first synchronization group among the multiple synchronization groups, wherein each synchronization group includes at least two target data streams, wherein , the target data streams in the same synchronization group need to be transmitted synchronously, and the first indication information further includes the identifier of the first synchronization group.

With reference to the first aspect, in some implementations of the first aspect, the first indication information further includes indication information of the first threshold.

With reference to the first aspect, in some implementations of the first aspect, the performing synchronous transmission processing on the plurality of target data streams includes: when the first target data stream in the plurality of target data streams and the plurality of target data streams are When the deviation of the transmission progress between the second target data streams in the stream is greater than the first threshold, and the transmission progress of the first target data stream is faster than the transmission progress of the second target data stream, the first device stops sending the A data packet in a first target data stream, wherein the second target data stream is a target data stream other than the first target data stream among the plurality of target data streams.

With reference to the first aspect, in some implementations of the first aspect, the method further includes: the method further includes: after a preset first time period elapses since the data packets in the first target data stream are stopped, if If the deviation of the transmission progress between the first target data stream and the second target data stream is still greater than the first threshold, the first device sends the data packets in the first target data stream; or automatically stops sending the first target data stream. The data packets in the target data stream have not reached the preset first duration, and the deviation of the transmission progress between the first target data stream and the second target data stream is less than or equal to the first threshold, the first device Send the data packets in the first target data stream.

With reference to the first aspect, in some implementations of the first aspect, the performing synchronous transmission processing on the plurality of target data streams includes: when the first target data stream in the plurality of target data streams and the plurality of target data streams are When the deviation of the transmission progress between the second target data streams in the stream is greater than the first threshold, and the transmission progress of the first target data stream is faster than the transmission progress of the second target data stream, the first device discards the first target data stream. The next data packet to be sent in the two target data streams.

With reference to the first aspect, in some implementations of the first aspect, the first device includes a terminal device, and acquiring the first indication information by the first device includes: the first device receives the first indication from a session management network element information; or the first device receives first indication information through a first interface, where the first interface is an interface between the first device and an application client, and the application client transmits the plurality of target data through the first device flow.

With reference to the first aspect, in some implementations of the first aspect, the first device includes an access network device or a user plane network element, and receiving the first indication information by the first device includes: the first device from the session management The network element receives the first indication information.

With reference to the first aspect, in some implementations of the first aspect, the first device is an access network device, and the method further includes: the first device receiving first request information, where the first request information request is the The first target data stream among the multiple target data streams is allocated the first radio resource; the synchronous transmission processing for the multiple target data streams includes: when the transmission progress between the first target data stream and the second target data stream is When the deviation is greater than the first threshold, and the transmission progress of the first target data stream is faster than the transmission of the second target data stream, the first device stops allocating the first radio resource for the first target data stream, wherein , the second target data stream is a target data stream other than the first target data stream among the plurality of target data streams.

With reference to the first aspect, in some implementations of the first aspect, the first request information includes information of a frame number corresponding to the first data packet or information of a timestamp corresponding to the first data packet, and the first data packet is the next data packet to be sent for the first target data stream.

With reference to the first aspect, in some implementations of the first aspect, before or at the same time as receiving the first request information, the first device further receives second request information, and the second request information request is the second target data The second wireless resource is allocated by the flow, and the second request information includes the information of the frame number corresponding to the second data packet or the information of the time stamp corresponding to the second data packet, and the second data packet is the next destination of the second target data flow. Send packets.

With reference to the first aspect, in some implementations of the first aspect, the first request information further includes first buffer information of the first target data stream, and the first buffer information is the frame corresponding to the first data packet The second request information further includes second buffer information of the second target data stream, and the second buffer information is the total amount of data to be sent of the frame corresponding to the second data packet.

With reference to the first aspect, in some implementations of the first aspect, the deviation of the transmission progress between the first target data stream and the second target data stream includes: the frame number corresponding to the first data packet and the second data packet The deviation of the corresponding frame number; or the deviation between the timestamp corresponding to the first data packet and the timestamp corresponding to the second data packet; or the time consumed by the first target data stream to transmit the first preset data amount is different from the first data packet. The deviation of the time consumed by the two target data streams to transmit the second preset data amount, wherein the first indication information further includes the preset sending rate of the first target data stream and the preset sending rate of the second target data stream , the ratio of the first preset data amount to the second preset data amount is the first ratio, and the ratio of the preset sending rate of the first target data stream to the preset sending rate of the second target data stream is the first Two ratios, the first ratio is associated with the second ratio; wherein, the first data packet is the next data packet to be sent by the first target data stream, and the second data packet is the next data packet to be sent by the second target data stream data pack.

In conjunction with the first aspect, in some implementations of the first aspect, the first data includes information about the frame number corresponding to the first data packet, and the second data includes information about the frame number corresponding to the second data packet; Or the frame number corresponding to the first data packet is determined by the frame header identification and the frame tail identification in the first target data stream, and the frame number corresponding to the second data packet is determined by the frame header identification and the frame end identification in the second target data stream. End of frame identification is determined.

With reference to the first aspect, in some implementations of the first aspect, the method further includes: the first device receiving second indication information, where the second indication information is used to instruct to preferentially send data that needs to be retransmitted in the target data stream packet; the first device sends the data packet that needs to be retransmitted according to the second indication information, wherein the sending time of the data packet that needs to be retransmitted is earlier than the sending time of other data packets to be sent in the target data stream .

With reference to the first aspect, in some implementations of the first aspect, the sending the data packet that needs to be retransmitted includes: placing the data packet that needs to be retransmitted at the top of the queue corresponding to the target data stream, sending the data packet that needs to be retransmitted Retransmitted data packets; or, place the data packets that need to be retransmitted in a retransmission queue, and send the data packets that need to be retransmitted, and the retransmission queues belong to the first QoS flow or the first QoS sub-flow, wherein, The priority of the first QoS flow is higher than the priority of the QoS flow corresponding to the target data flow, and the priority of the first QoS sub-flow is higher than the priority of the QoS sub-flow corresponding to the target data flow.

In a second aspect, a communication method is provided, including: generating first indication information, where the first indication information is used to indicate synchronous transmission of multiple target data streams; sending the first indication information to a first device, the first device It is used for performing synchronous transmission processing on at least one target data stream in the plurality of target data streams, so that the deviation of the transmission progress among the plurality of target data streams is less than or equal to the first threshold.

According to the solution of the present application, by sending the first indication information to the first device, the first device can perform synchronous transmission processing on multiple target data streams according to the first indication information, and control the deviation of the transmission progress among the multiple target data streams less than or equal to the first threshold. Compared with the prior art, when multiple target data streams are transmitted, the multiple target data streams are independently transmitted, regardless of the correlation between each target data stream, the solution of the present application can improve user experience.

In conjunction with the second aspect, in some implementations of the second aspect, the deviation of the transmission progress between the multiple target data streams includes one or more of the following: frame numbers of transmission between the multiple target data streams The deviation of the time stamps between the multiple target data streams, the deviation of the time consumed by the multiple target data streams to transmit the preset data amount.

With reference to the second aspect, in some implementations of the second aspect, the first indication information is one, and the first indication information includes identification information of each target data stream in the multiple target data streams; or the There are multiple pieces of first indication information, and the pieces of first indication information are in one-to-one correspondence with multiple target data streams, and each first indication information includes identification information of the corresponding target data stream; wherein, the identification information of the target data stream includes At least one of the following parameters: quintuple information corresponding to the target data flow, information about the quality of service QoS flow identification information corresponding to the target data flow, or information about the QoS flow sub-flow identification information corresponding to the target data flow.

With reference to the second aspect, in some implementations of the second aspect, the multiple target data streams belong to a first synchronization group among the multiple synchronization groups, wherein each synchronization group includes at least two target data streams, wherein , the target data streams in the same synchronization group need to be transmitted synchronously, and the first indication information further includes the identifier of the first synchronization group.

With reference to the second aspect, in some implementations of the second aspect, the first indication information further includes indication information of the first threshold.

With reference to the second aspect, in some implementations of the second aspect, the first indication information further includes a preset sending rate of each target data stream in the multiple target data streams.

In a third aspect, a method for transmitting data is provided, including: the first device receiving second indication information, where the second indication information is used to instruct to preferentially send data packets that need to be retransmitted in a target data stream; the first device receives For the data packet that needs to be retransmitted, send the data packet that needs to be retransmitted according to the second indication information, wherein the sending time of the data packet that needs to be retransmitted is earlier than the sending time of other data packets to be sent in the target data stream time.

With reference to the third aspect, in some implementations of the third aspect, the sending the data packet that needs to be retransmitted includes: placing the data packet that needs to be retransmitted at the top of the queue corresponding to the target data stream, sending the data packet that needs to be retransmitted retransmitted data packet; or place the data packet that needs to be retransmitted in a retransmission queue, and send the data packet that needs to be retransmitted, the retransmission queue belongs to the first QoS flow or the first QoS sub-flow, wherein all The priority of the first QoS flow is higher than the priority of the QoS flow corresponding to the target data flow, and the priority of the first QoS sub-flow is higher than the priority of the QoS sub-flow corresponding to the target data flow.

With reference to the third aspect, in some implementations of the third aspect, the data packet that needs to be retransmitted includes a retransmission marker, and the retransmission marker is used to indicate that the data packet that needs to be retransmitted needs to be retransmitted.

With reference to the third aspect, in some implementations of the third aspect, the second indication information further includes identification information of the target data stream.

With reference to the third aspect, in some implementations of the third aspect, the second indication information further includes identification information of the first QoS flow or identification information of the first QoS sub-flow.

In a fourth aspect, an apparatus for transmitting data is provided, and the apparatus for transmitting data includes a unit for executing the method in any of the possible implementation manners of the first aspect and the third aspect.

In a fifth aspect, a communication device is provided, the communication device comprising means for performing the method of the second aspect or various implementations thereof.

In a sixth aspect, a computer-readable medium is provided, the computer-readable medium stores a computer program (which may also be referred to as code, or an instruction), when it runs on a computer, causing the computer to execute the above-mentioned first to third aspects. method in any of the possible implementations.

In a seventh aspect, a computer program product is provided, the computer program product comprising: computer program code, when the computer program code is executed by a computer, causing the computer to execute any one of the possible implementations of the first to third aspects. method.

In an eighth aspect, a chip is provided, and a processing circuit is provided on the chip, and the processing circuit is configured to execute the method in any one of the possible implementation manners of the first to third aspects.

In a ninth aspect, a communication device is provided, the communication device includes a memory for storing a computer program; a processor for calling and running the computer program from the memory, so that the communication device implements any one of the first to third aspects method in one possible implementation.

Description of drawings

FIG. 1 shows the architecture of a communication system to which this embodiment of the present application is applicable.

FIG. 2 shows an example of a schematic interaction diagram of the method for transmitting data of the present application.

FIG. 3 shows another example of a schematic interaction diagram of the method for transmitting data of the present application.

FIG. 4 shows another example of a schematic interaction diagram of the method for transmitting data of the present application.

FIG. 5 shows another example of a schematic interaction diagram of the method for transmitting data of the present application.

FIG. 6 shows another example of a schematic interaction diagram of the method for transmitting data of the present application.

FIG. 7 shows another example of a schematic interaction diagram of the method for transmitting data of the present application.

FIG. 8 shows an example of a schematic flow chart of the method for transmitting data of the present application.

FIG. 9 shows another example of a schematic flow chart of the method for transmitting data of the present application.

FIG. 10 shows another example of a schematic flow chart of the method for transmitting data of the present application.

FIG. 11 shows a schematic block diagram of an example of the communication device provided by the present application.

FIG. 12 shows another example of a schematic block diagram of the communication device provided by the present application.

Detailed ways

The technical solutions in the present application will be described below with reference to the accompanying drawings. Obviously, the described embodiments are a part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present application.

The technical solution proposed in this application can be applied to a communication system capable of completing communication through an access network and a core network, as shown in FIG. 1 .

In this embodiment of the present application, the access network includes access network equipment, and the access network equipment is a device that provides a cell. For example, it may be an access point (Access Point, AP) in a WLAN, or an access point in WCDMA. A base station (NodeB, NB), or a gNB in a new wireless system (New Radio, NR) system, or an evolved base station (Evolutional Node B, eNB or eNodeB) in LTE, and in a 5G network, it can also be Radio access network equipment (Radio Access Network, RAN).

In this embodiment of the present application, the core network may include, but is not limited to, user plane network elements, session management network elements, and policy control network elements. Among them, the user plane network element is used for packet routing and forwarding and quality of service (QoS) processing of user plane data, etc., and is mainly responsible for processing user packets, such as forwarding and charging. For example, in a 5G communication system, the user plane network element may be a user plane function (user plane function, UPF) network element. In the future communication system, the user plane network element may still be the UPF network element, or may have other names, which are not limited in this application. The session management network element is mainly used for session management, such as session establishment, modification and release. Specific functions such as terminal device Internet Protocol (IP) address allocation and management, selection of manageable user plane functions, policy control and charging function interface endpoints, and downlink data notification, etc. For example, in a 5G communication system, the session management network element may be a session management function (session management function, SMF) network element. In the future communication system, the session management network element may still be an SMF network element, or may have other names, which are not limited in this application. The policy control network element is used to guide the unified policy framework of network behavior, and provides policy rule information for the control plane functional network element. In a 4G communication system, the policy control network element may be a policy and charging rules function (policy and charging rules function, PCRF) network element. In a 5G communication system, the policy control network element may be a policy control function (PCF) network element. In the future communication system, the policy control network element may still be the PCF network element, or may have other names, which are not limited in this application.

The present application is aimed at scenarios such as VR, AR, MR, multi-camera, tire crane, etc., and the multiple target data streams transmitted in these scenarios have content and/or time dependencies. The synchronous transmission of multiple target data streams can be realized by the solution of the present application. To implement the solution of the present application, a plurality of target data streams with content and/or time correlations must be determined first.

The following describes how to determine multiple target data streams with content and/or temporal dependencies:

way a:

The application client determines multiple target data streams with content and/or temporal dependencies.

way b:

The application server determines multiple target data streams with content and/or time dependencies. For example, the application server may determine that multiple target data streams have content and/or temporal dependencies based on the type of application.

When the device #A performs synchronous transmission processing on multiple target data streams, the first indication information may be sent to the device #A. Device #A communicates with the application client through the first interface. Device #A can be deployed in a terminal device together with the application client. For example, Device #A is the first module of the terminal device, and the first module is used to transmit data and signaling with the access network device. A module can be a modem of device #A; the application client can also be an external device, such as a camera, device #A is a client front-end for data and signaling transmission with access network devices Equipment (customer premise equipment, CPE).

The first indication information is used to indicate synchronous transmission of multiple target data streams, and the first indication information includes identification information of the target data streams and information of the first threshold. The first threshold value may be the maximum value of the deviation of the allowable transmission progress between any two target data streams in the multiple target data streams; or, the first threshold value may be two target data streams specified in the multiple target data streams The maximum value of the deviation of the allowable transmission progress between the streams, and the first threshold may be different for the two specified target data streams at this time. The first threshold may be determined by the application client or the application server. For example, when the target data stream is a video stream, the first threshold may be determined with reference to the range of deviations perceivable by the naked eye. For example, the difference between the transmission progress of two video streams is allowed to be less than or equal to 5 frames. If the transmission progress of the two video streams exceeds 5 frames, the viewer's experience will be affected.

The following describes the manner of sending the first indication information to device #A:

Way 1:

Corresponding to the method a, the application client sends information #A (an example of the first instruction information) to the device #A. Accordingly, device #A receives the information #A. The information #A includes information about the first identification of each target data stream in the multiple target data streams (an example of identification information). For example, the first identification can be the quintuple information of the target data stream, and the first identification It can also be a data stream identifier. For example, the application client can assign a data stream identifier to the target data stream, and insert the data stream identifier into the data packet corresponding to the target data stream to identify the target data stream. In addition, the information #A also includes information of the first threshold value. Optionally, the information #A further includes identification information of the synchronization group.

Alternatively, the application client sends multiple pieces of information #A to device #A, each message #A includes information about the first identifier of a target data stream, and at the same time, each message #A carries a synchronization group identifier, and device #A According to the received information #A with the same synchronization group identifier, multiple target data streams that need to be synchronized for transmission are determined. In addition, the information #A also includes information of the first threshold value. The application client also sends the information of the synchronization group to the device #A, wherein the information of the synchronization group includes the information of the identification of the synchronization group and the first threshold value.

Way 2:

Corresponding to the mode b, the application server sends the information #A to the core network element, and the core network element sends the information #A to the device #A. Accordingly, device #A receives the information #A. Similarly, the core network element can send one or more pieces of information #A. When sending multiple pieces of information #A, each piece of information #A needs to carry a synchronization group identifier, and the core network element also sends a synchronization group identifier to device #A. group information.

The following describes the specific process of synchronous transmission of multiple target data streams by device #A, as shown in Figure 2:

S110: Device #A receives the first indication information, and acquires information of the first threshold and identification information of each target data stream in the multiple target data streams.

Device #A may receive the first indication information according to the above-mentioned method 1 or method 2, and obtain information of the first threshold and identification information of each target data stream in the multiple target data streams.

S120, the application client sends a data packet to the device #A. Accordingly, device #A receives the data packet.

Optionally, S125, device #A can judge whether the target data stream to which the data packet belongs is the target data in multiple target data streams according to the identification information of the target data stream to which the data packet belongs, such as the quintuple information carried in the data packet. flow. Alternatively, the identification information of other types of target data streams can also be carried in the data packet, for example, the data stream identifier is carried in the data packet, and device #A identifies whether the data packet belongs to multiple The target data stream within the target data stream.

S130, Device #A determines information about the transmission progress of each target data stream in the multiple target data streams.

The following describes how the transfer progress of each target data stream is determined:

Way 1:

Device #A determines the frame number transmitted by each target data stream, and the transmitted frame number includes the frame number corresponding to the next data packet to be sent by the target data stream.

Way 2:

Device #A determines the information of the timestamp corresponding to the next data packet to be sent in each target data stream, and the information of the timestamp can be used to indicate the transmission progress of the target data stream.

Way 3:

Device #A determines the time it takes for each target data stream to transmit a preset amount of data.

It should be understood that the above enumerations are only some embodiments of the transmission progress, and other methods may also be used according to actual situations, for example, the number of data packets that have been transmitted for each target data stream.

S140, Device #A performs synchronous transmission processing on multiple target data streams.

When the deviation of the transmission progress between the first target data stream of the plurality of target data streams and the second target data stream of the plurality of target data streams is greater than the first threshold, and the transmission of the first target data stream When the progress is faster than the transmission progress of the second target data stream, the device #A stops sending data packets in the first target data stream, wherein the second target data stream is the first target data in the multiple target data streams. Destination data stream outside of the stream.

The following describes how to perform synchronous transmission processing on multiple target data streams:

Way 1:

Device #A receives a first data packet and a second data packet, the first data packet belongs to the first target data stream among the multiple target data streams, and the first data packet is the next data packet to be sent from the first target data stream ; the second data packet belongs to the second target data stream in the plurality of target data streams, and the second data packet is the next data packet to be sent from the second target data stream or the last sent data packet of the second target data stream.

If the deviation between the frame number corresponding to the first data packet and the frame number corresponding to the second data packet is greater than the first threshold, and the frame number corresponding to the first data packet is greater than the frame number corresponding to the second data packet, device #A stops sending Data packets in the first target data stream.

For example, the frame number corresponding to the first data packet is the 15th frame, the frame number corresponding to the second data packet is the 10th frame, and the first threshold is 4 frames, since the frame number corresponding to the first data packet corresponds to the second data packet If the deviation of the frame number is greater than 4 frames, and the transmission progress of the first target data stream is faster than the transmission progress of the second target data stream, stop sending the first data packet and the data of the first target data stream after the first data packet Bag. It should be understood that the starting frame number of each target data stream in the multiple target data streams is the same.

Device #A may determine the frame number corresponding to the first data packet according to the information of the frame number carried in the first data packet.

Alternatively, device #A determines a frame according to the frame header identifier and/or the frame end identifier, and records the transmission progress of each target data stream. The first data packet includes a frame header identifier, and device #A determines a frame number corresponding to the first data packet according to the transmission progress of the first target data stream and the frame header identifier. For example, the frame number obtained by adding one to the frame number corresponding to the most recent data packet transmitted by the first target data stream is determined as the frame number corresponding to the first data packet.

Alternatively, device #A determines a frame according to the frame header identification and/or the frame end identification. The first data packet does not include the information of the frame header identification and the frame number corresponding to the first data packet, and the device #A determines the frame number of the data packet transmitted most recently by the first target data stream as the frame number corresponding to the first data packet. .

Similarly, device #A can determine the frame number corresponding to the second data packet.

Way 2:

If the deviation between the timestamp corresponding to the first data packet and the timestamp corresponding to the second data packet is greater than the first threshold, and the timestamp corresponding to the first data packet is greater than the timestamp corresponding to the second data packet, device #A stops sending Data packets in the first target data stream.

For example, the time stamp corresponding to the first data packet is 15ms, the time stamp corresponding to the second data packet is 10ms, the first threshold is 4ms, and the deviation between the time stamp corresponding to the first data packet and the time stamp corresponding to the second data packet is greater than 4ms, and the transmission progress of the first target data stream is faster than the transmission progress of the second target data stream, stop sending the first data packet and the data packets of the first target data stream after the first data packet.

Way 3:

When the difference between the time consumed by the first target data stream of the multiple target data streams to transmit the first preset data amount and the time consumed by the second target data stream of the multiple target data streams to transmit the second preset data amount is greater than the first When a threshold is set and the transmission progress of the first target data stream is faster than the transmission progress of the second target data stream, device #A stops sending data packets in the first target data stream.

It should be understood that, at this time, the first indication information further includes the preset sending rate or total data volume of each target data stream in the multiple target data streams, wherein, when the first indication information includes each target data stream in the multiple target data streams When there are preset sending rates of the first target data stream, the ratio of the first preset data amount to the second preset data amount is the first ratio, and the preset sending rate of the first target data stream is equal to the preset sending rate of the second target data stream. Let the ratio of the sending rate be the second ratio, and the first ratio is associated with the second ratio. For example, the first ratio is the same as the second ratio; when the first indication information includes the total data flow of each target data flow, The ratio of the first preset data volume to the second preset data volume is the first ratio, the ratio of the total data volume of the first target data stream to the total data volume of the second target data stream is the second ratio, and the first ratio Associated with this second ratio, for example, the first ratio is the same as the second ratio.

For example, the preset sending rate of the first target data stream is 2M/s, the preset sending rate of the second target data stream is 1M/s, the first preset data volume is 2M, and the second preset data volume is 1M, The first threshold is 0.03s, the time t1 for device #A to monitor the first target data stream to send 2M data is 0.98s, and the time t2 for the second target data stream to send 1M data is 1.02s, t1 and t2 The deviation is greater than the first threshold, and the transmission progress of the first target data stream is faster than the transmission progress of the second target data stream, and device #A stops sending data packets in the first target data stream.

For example, the total data volume of the first target data stream is 200M, the total data volume of the second target data stream is 100M, the first preset data stream is 2M, the second preset data stream is 1M, and the first threshold is 0.03s , the time t1 consumed by device #A to monitor the first target data stream to send 2M data volume is 0.98s, the time t2 consumed by the second target data stream to send 1M data volume is 1.02s, and the deviation between t1 and t2 is greater than the first threshold , and the transmission progress of the first target data stream is faster than that of the second target data stream, and device #A stops sending data packets in the first target data stream.

It should be understood that the size of the preset data amount may be a variable. For example, the first preset data amount is 4M, and the second preset data amount is correspondingly 2M; or, the first preset data amount is 6M, and the second preset data amount is correspondingly 3M, and so on. That is, the device #A can monitor the time consumed by the multiple target data streams to send the preset data amount according to a certain rule.

Way 4:

When the ratio of the actual sending rate of the first target data stream among the multiple target data streams to the actual sending rate of the second target data stream among the multiple target data streams, the preset sending rate of the first target data stream and the preset sending rate of the second target data stream When the deviation of the ratio of sending rates is greater than the first threshold, and the transmission progress of the first target data stream is faster than the transmission progress of the second target data stream, device #A stops sending data packets in the first target data stream.

It should be understood that, at this time, the first indication information also includes the preset sending rate of each target data stream in the multiple target data streams, or includes the relative value of each target data stream in the multiple target data streams relative to other target data streams. preset rate ratio.

For example, the first threshold is 0.4, the preset sending rate of the first target data stream is 2M/s, the preset sending rate of the second target data stream is 1M/s, and the preset sending rate of the first target data stream is the same as that of the first target data stream. The ratio of the preset sending rates of the two target data streams is 2. At t=1s, the first target data stream sends 2M data volume, the second target data stream sends 0.8M data volume, and the ratio of the sending rate of the first target data stream to the sending rate of the second target data stream is 2÷ 0.8=2.5, the deviation is greater than the first threshold, and the transmission progress of the first target data stream is faster than that of the second target data stream, device #A stops sending data packets in the first target data stream.

In modes 1-4, after the preset first time period elapses since the data packets in the first target data stream are stopped, if the deviation of the transmission progress between the first target data stream and the second target data stream is still greater than the first target data stream. A threshold at which device #A sends packets in the first target data stream. At this time, the first target data stream no longer waits for the transmission of the second target data stream.

Alternatively, in modes 1-4, the preset first duration has not been reached since the data packets in the first target data stream are stopped, and device #A determines the transmission between the first target data stream and the second target data stream If the deviation of the progress is less than or equal to the first threshold, the device #A sends the data packets in the first target data stream.

Way 5:

Device #A receives a second data packet, the second data packet belongs to the second target data stream among the multiple target data streams, and the second data packet is the next data packet to be sent from the second target data stream. When the deviation of the transmission progress between the first target data stream and the second target data stream is greater than the first threshold, and the transmission progress of the first target data stream is faster than the transmission progress of the second target data stream, the Two data packets are discarded, or the second data packet and some data packets following the second data packet can be discarded, thereby reducing the deviation of the transmission progress between the first target data stream and the second target data stream.

The manner in which the device #A determines that the deviation of the transmission progress between the first target data stream and the second target data stream is greater than the first threshold may be similar to that in manners 1-4, and will not be described in detail here.

In a possible manner, whether to discard the second data packet may be decided according to the reliability or importance of the second data packet. For example, when transmitting a video stream, if the second data packet belongs to an intra-coded picture frame, or I frame for short, then the second data packet is more reliable or important to the second target data stream. If the second data packet belongs to a predictive-coded picture frame of a predictive-coded picture, a P frame for short, the second data packet is reliable for the second target data stream or less important packets, the second packet can be discarded.

It should be understood that the frame type to which the second data packet belongs may be determined according to the frame number corresponding to the second data packet. For example, the size of a group of pictures (GOP) is 4 frames, the frame number of the first I frame is the first frame, and if the frame number corresponding to the second data packet is the fifth frame, the second data packet is an I frame.

Way 6:

Device #A receives the first data packet and the second data packet, the first data packet belongs to the first target data stream, the first data packet is the next to-be-sent data packet of the first target data stream, and the second data packet belongs to the second target data stream data stream, the second data packet is the next data packet to be sent in the second target data stream, when the deviation of the transmission progress between the first target data stream and the second target data stream is greater than the first threshold, and the first target data stream If the transmission progress of the stream is faster than the transmission progress of the second target data stream, stop sending the data packets in the first target data stream, and discard the second data packet, or discard the second data packet and part of the data after the second data packet Bag.

The manner in which the device #A determines that the deviation of the transmission progress between the first target data stream and the second target data stream is greater than the first threshold may be similar to that in manners 1-4, and will not be described in detail here. Moreover, similar to the manners 1-4, after a certain condition is satisfied, the data packets in the first target data stream may continue to be sent, which will not be further described here.

In a possible manner, similar to manner 5, it can be determined whether the second data packet can be discarded according to the frame type to which the second data packet belongs. For example, if the second data packet belongs to a P frame, the second data packet can be discarded Bag.

S150: Device #A sends a data packet according to the result of performing synchronous transmission processing on multiple target data streams. Accordingly, the RAN receives the data packet.

S160, the RAN sends the data packet to the core network element. Correspondingly, the core network element receives the data packet.

For example, in a 5G network, packets can be sent to the UPF.

It should be understood that the process of the RAN sending the data packet to the core network element may be similar to that in the prior art, and details are not described herein again.

S170, the core network element sends a data packet to the application server. Accordingly, the application server receives the data packet.

For example, in a 5G network, data packets can be sent by the UPF to the application server.

It should be understood that the process of the core network element sending the data packet to the application server may be similar to that in the prior art, and will not be described herein again.

According to the embodiments of the present application, when transmitting data upstream, device #A can perform synchronous transmission processing on multiple target data streams, so that the deviation of the transmission progress among the multiple target data streams is less than or equal to the first threshold. Compared with the independent transmission of multiple target data streams, without considering the correlation between each target data stream, the solution of the present application can achieve higher synchronization accuracy between multiple target data streams, thereby improving user experience.

When the RAN performs synchronous transmission on multiple target data streams, first indication information may be sent to the RAN, where the first indication information is used to instruct the RAN to perform synchronous transmission on the multiple target data streams. The first indication information includes identification information of the target data stream and information of the first threshold. The first threshold value may be the maximum value of the deviation of the allowable transmission progress between any two target data streams in the multiple target data streams; or, the first threshold value may be two target data streams specified in the multiple target data streams The maximum value of the deviation of the allowable transmission progress between the streams, and the first threshold may be different for the two specified target data streams at this time.

The following describes the manner of sending the first indication information to the RAN:

Way 1:

Corresponding to the mode a, the application client sends the information #A to the core network element through the device #A, the information #A includes the information of the first identification of each target data stream in the multiple target data streams, and the information #A also includes the first identifier. information of a threshold; or, device #A sends a plurality of messages #A to the core network element, each message #A includes information of the first identifier of a target data stream and a synchronization group identifier, and device #A also sends a message to the core network. The network element sends the information of the synchronization group. The core network element maps multiple target data flows to multiple quality of service (quality of service, QoS) flows, that is, establishes the correspondence between the first identifiers of the multiple target data flows and the QoS flow identifiers (QoS flow ID, QFI) relation. The core network element sends information #B (another example of the first indication information) to the RAN, where the information #B includes QFI (an example of identification information) corresponding to multiple target data streams and information of the first threshold. Accordingly, the RAN receives this information #B.

Alternatively, the core network element sends multiple messages #B to the RAN, each message #B includes a QFI corresponding to a target data stream, and in this case, each message #B should also carry a synchronization group identifier. The RAN receives multiple pieces of information #B with the same synchronization group identifier, and determines multiple target data streams that need to be processed for synchronization transmission. The core network element also sends the synchronization group information to the RAN.

When transmitting data upstream, the core network element also needs to send information #E to the device #A, where the information #E includes the correspondence between the first identifier of each target data stream in the multiple target data streams and the QFI. Accordingly, device #A receives information #E.

For example, in a 5G network, device #A can send information #A to SMF, for example, by sending information #A through a session establishment request or session modification request, and the SMF maps multiple target data flows to multiple QoS flows. RAN sends message #B. The SMF sends information #E to device #A through a NAS message.

During downlink data transmission, taking a 5G network as an example, the above-mentioned core network element can be an SMF. At this time, the SMF also needs to send information #E to the UPF, and the information #E includes the information of each target data stream in the multiple target data streams. The correspondence between the first identifier and the QFI. Accordingly, the UPF receives the information #E.

Way 2:

Corresponding to the mode a, the application client sends the information #A to the core network element through the device #A, the information #A includes the information of the first identification of each target data stream in the multiple target data streams, and the information #A also includes the first identifier. information of a threshold; or, the core network element receives multiple pieces of information #A, each information #A includes information about the first identifier of a target data stream and a synchronization group identifier, and the core network element also receives the synchronization group information. The core network element maps the multiple target data flows to multiple sub-flows of the same QoS flow, that is, establishes a correspondence between the first identifiers of the multiple target data flows and the multiple sub-flow identifiers of the same QoS flow. The core network element sends information #C (another example of the first indication information) to the RAN, where the information #C includes multiple sub-flow identifiers (an example of identification information) of the same QoS flow and information about the first threshold, optionally The QFI can also be included. Accordingly, the RAN receives this information #C. Similarly, the core network element can also send multiple messages #C to the RAN, each message #C includes a sub-flow identifier of a QoS flow, and each message #C also needs to include the synchronization group identifier, and the core network element also Send the synchronization group information to the RAN.

When transmitting data upstream, the core network element also needs to send information #F to device #A, where information #F includes the first identifier of each target data flow in the multiple target data flows and multiple sub-flows of the same QoS flow The corresponding relationship of the identification. Accordingly, device #A receives information #F.

For example, in a 5G network, device #A can send information #A to SMF, which maps multiple target data flows to multiple sub-flows of the same QoS flow, and SMF sends information #C to RAN. The SMF sends information #F to device #A through a NAS message.

When transmitting data in the downlink, taking a 5G network as an example, the above-mentioned core network element can be an SMF. At this time, the SMF also needs to send information #F to the UPF, and the information #F includes the information of each target data stream in the multiple target data streams. The correspondence between the first identifier and the identifiers of multiple sub-flows of the same QoS flow. Accordingly, the UPF receives the information #F.

Way 3:

Corresponding to the mode b, the application server sends the information #A to the core network element, the information #A includes the information of the first identification of each target data stream in the multiple target data streams, and the information #A also includes the information of the first threshold; Alternatively, the core network element receives multiple pieces of information #A, each information #A includes information of the first identifier of a target data stream and a synchronization group identifier, and the core network element also receives the synchronization group information. The core network element maps multiple target data flows to multiple QoS flows, and the core network element sends information #B to the RAN. The core network element also sends the synchronization group information to the RAN. Accordingly, the RAN receives this information #B. For details, please refer to Method 1.

When transmitting data in the uplink, the core network element also needs to send the information #E to the device #A. Accordingly, device #A receives information #E.

For example, in a 5G network, an application server can send information #A to SMF through PCF, SMF maps multiple target data flows to multiple QoS flows, SMF sends information #B to RAN, and SMF sends information # to device #A E.

During downlink data transmission, taking a 5G network as an example, the above-mentioned core network element may be an SMF. At this time, the SMF also needs to send the information #E to the UPF, and correspondingly, the UPF receives the information #E.

Way 4:

Corresponding to the mode b, the application server sends the information #A to the core network element, the information #A includes the information of the first identification of each target data stream in the multiple target data streams, and the information #A also includes the information of the first threshold; Alternatively, the core network element receives multiple pieces of information #A, each information #A includes information of the first identifier of a target data stream and a synchronization group identifier, and the core network element also receives the synchronization group information. The core network element maps multiple target data flows to multiple sub-flows of the same QoS flow, and the core network element sends information #C to the RAN. Accordingly, the RAN receives this information #C. See method 2 for details.

When transmitting data in the uplink, the core network element also needs to send the information #F to the device #A. Accordingly, device #A receives information #F.

For example, in a 5G network, the application server can send information #A to the SMF through the PCF, and the SMF maps multiple target data flows to multiple sub-flows of the same QoS flow, the SMF sends the information #C to the RAN, and the SMF sends the device# A sends message #F.

During downlink data transmission, taking a 5G network as an example, the above-mentioned core network element may be an SMF. At this time, the SMF also needs to send the information #F to the UPF, and correspondingly, the UPF receives the information #F.

The following introduces a specific process of synchronous transmission of uplink data of multiple target data streams by the RAN, as shown in Figure 3:

S210: The RAN receives the first indication information, and obtains information of the first threshold and identification information of each target data stream in the multiple target data streams.

For example, the RAN may obtain the information of the first threshold value in any one of the foregoing manners 1 to 4, and the identification information of each target data stream in the multiple target data streams.

S220, the application client sends a data packet to the device #A. Accordingly, device #A receives the data packet.

S230: Device #A sends first request information to the RAN, where the first request information is used to request the RAN to allocate radio resources. Accordingly, the RAN receives the first request information.

S240: The RAN determines information about the transmission progress of each target data stream in the multiple target data streams.

S250, the RAN performs synchronous transmission processing on the multiple target data streams.

The following describes the manner in which the RAN performs synchronous transmission processing on multiple target data streams according to the first request information:

Way 1:

The first request information requests to allocate a first radio resource for a first target data stream in the plurality of target data streams. The first request information includes frame number information corresponding to the first data packet, where the first data packet is the next data packet to be sent in the first target data stream.

When the deviation between the frame number corresponding to the first data packet and the frame number corresponding to the second data packet is greater than the first threshold, and the frame number corresponding to the first data packet is greater than the frame number corresponding to the second data packet, the RAN stops the first A first radio resource allocated by a target data stream, wherein the second data packet belongs to the second target data stream among the multiple target data streams, and the second data packet is the next data packet to be sent or the first data packet of the second target data stream. Two destination data streams are the last sent packet.

It should be understood that the RAN also receives the second request information before receiving the first request information, or the RAN receives the first request information and the second request information in one message, wherein the second request information requests allocation of the second target data flow For the second wireless resource, the second request information includes a frame number corresponding to the second data packet, and the second data packet is the next data packet to be sent in the second target data stream.

In response to the second request information, the RAN allocates second radio resources for the second target data flow.

It should be understood that when the deviation of the transmission progress between the first target data stream and the second target data stream is greater than the first threshold, and the transmission progress of the first target data stream is faster than the transmission of the second target data stream, the RAN may also A first radio resource is allocated, and the first radio resource is less than the second radio resource.

For example, the bandwidth allocated by the RAN for the first target data flow is smaller than the bandwidth allocated for the second target data flow. Due to the different bandwidths of the allocated radio resources, the transmission resources obtained by the second target data flow are larger than the resources obtained by the first target data flow, so that more data can be sent.

In a possible manner, the first request information further includes first buffer information of the first target data stream and second buffer information of the second target data stream, where the first buffer information is the waiting list of the frame corresponding to the first data packet. The size of the total amount of data to be sent, and the second buffer information is the size of the total amount of data to be sent in the frame corresponding to the second data packet. It should be understood that after the RAN receives the first request information, the RAN may perform synchronous transmission processing in combination with the second request information received last time. For example, according to the frame number and second buffer information of the second data packet in the last received second request information, and the frame number and first buffer information of the first data packet in the first request information (optional) A difference between the transmission progress of the first target data stream and the second target data stream is determined. For example, the first threshold is 4, the frame number of the second data packet is the 15th frame, the second buffer information is 100Kb, the frame number of the first data packet is the 20th frame, and the first buffer information is 200Kb. The 15th frame of the target data stream still has data that has not been sent, and the difference between the frame number of the first data packet and the frame number of the second data packet is 5, which is greater than the first threshold of 4. Therefore, the RAN can decide not to The first target data flow allocates first radio resources.

The first request information may further include identification information of the first target data flow and the second target data flow, where the identification information may be QFI or QoS flow sub-flow identifiers corresponding to the first target data flow and the second target data flow. The RAN may determine, according to the identification information of the first target data stream and the second target data stream, that the first target data stream and the second target data stream are target data streams among the multiple target data streams.

It should be understood that the above two request information may be sent in one message, and correspondingly, the two request information may also be responded to in one response message. The above two request messages can also be sent by different devices #A respectively. This application does not limit this.

Way 2:

The first request information requests to allocate radio resources for a first target data stream in the plurality of target data streams. The first request information includes timestamp information corresponding to the first data packet, where the first data packet is the next data packet to be sent in the first target data stream.

When the deviation between the timestamp corresponding to the first data packet and the timestamp corresponding to the second data packet is greater than the first threshold, and the timestamp corresponding to the first data packet is greater than the timestamp corresponding to the second data packet, the RAN stops the A first radio resource allocated by a target data stream, wherein the second data packet belongs to the second target data stream among the multiple target data streams, and the second data packet is the next data packet to be sent or the first data packet of the second target data stream. Two destination data streams are the last sent packet.

Similar to Mode 1, the radio resources allocated by the RAN for the first target data flow and the second target data flow may also be in other situations, and the description is not repeated here.

Way 3:

The first request information requests to allocate radio resources for a first target data stream in the plurality of target data streams.

When the difference between the time consumed by the first target data stream to transmit the first preset data amount and the time consumed by the second target data stream to transmit the second preset data amount is greater than the first threshold, and the transmission progress of the first target data stream When the transmission progress of the second target data flow is faster than that of the second target data flow, the RAN stops allocating the first radio resource for the first target data flow, or the first radio resource allocated by the RAN for the first target data flow is smaller than the second target data flow allocated for the second target data flow. wireless resources.

Similar to Mode 3 in S140, at this time, the RAN monitors the time consumed by the multiple target data streams sending the preset data amount.

Way 4:

When the ratio of the actual sending rate of the first target data stream among the multiple target data streams to the actual sending rate of the second target data stream among the multiple target data streams, the preset sending rate of the first target data stream and the preset sending rate of the second target data stream When the deviation of the ratio of the transmission rates is greater than the first threshold, and the transmission progress of the first target data stream is faster than the transmission progress of the second target data stream, the RAN stops allocating the first radio resource for the first target data stream, or the RAN is the first target data stream. The first radio resource allocated for the target data flow is smaller than the second radio resource allocated for the second target data flow.

In the above manners 1-4, after the preset first time period has elapsed since the radio resource allocation for the first target data stream is stopped, or after the preset second time period has elapsed since the first request information is received, if the If the deviation of the transmission progress between a target data stream and the second target data stream is still greater than the first threshold, radio resources are allocated to the first target data stream. At this time, the first target data stream no longer waits for the transmission of the second target data stream.

Or, when the preset first time period has not expired after the radio resource allocation for the first target data flow is stopped, if the RAN determines that the deviation of the transmission progress between the first target data flow and the second target data flow is less than or equal to the first target data flow If a threshold is set, radio resources can be allocated for the first target data flow.

S260: Device #A sends a data packet according to the result of performing synchronous transmission processing on the multiple target data streams. Accordingly, the RAN receives the data packet.

S270, the RAN sends the data packet to the core network element. Correspondingly, the core network element receives the data packet.

For example, in a 5G network, packets can be sent to the UPF.

S280, the core network element sends a data packet to the application server. Accordingly, the application server receives the data packet.

It should be understood that the process of the core network element sending the data packet to the application server may be similar to that in the prior art, and details are not described herein again.

The following introduces a specific process of synchronous transmission of downlink data of multiple target data streams by the RAN, as shown in Figure 4:

S310: The RAN receives the first indication information, and obtains information of the first threshold and identification information of each target data stream in the multiple target data streams.

For example, the RAN may acquire the information of the first threshold and the identification information of each target data stream in the multiple target data streams in any one of the foregoing manners 1 to 4.

S320: The application server sends a data packet, where the data packet includes a first identifier of the target data stream to which the data packet belongs. Accordingly, the UPF receives the data packet.

S330, the UPF sends the data packet to the RAN. Accordingly, the RAN receives the data packet.

The UPF determines the QFI of the QoS flow to which the data packet belongs according to the information #E received from the SMF and the first identifier in the data packet, and the UPF encapsulates the data packet into a GTP-U data packet, wherein the GTP-U packet is in the Include the QFI corresponding to the data packet.

Or, the UPF determines the QoS flow sub-flow identifier to which the data packet belongs according to the information #F received from the SMF and the first identifier in the data packet, and the UPF encapsulates the data packet into a GTP-U data packet, wherein the GTP-U The U packet includes the QoS flow sub-flow identifier corresponding to the data packet.

Optionally, in S335, the RAN determines whether the target data flow to which the data packet belongs is a target data flow among multiple target data flows according to the QFI and/or QoS flow sub-flow identifier carried in the GTP-U of the data packet.

S340: The RAN determines information about the transmission progress of each target data stream in the multiple target data streams.

The manner in which the RAN determines the information on the transmission progress of each target data stream in the multiple target data streams is similar to that in S130, and will not be described herein again.

S350, the RAN performs synchronous transmission processing on the multiple target data streams.

The manner in which the RAN performs synchronous transmission processing on multiple target data streams may be similar to that in S140, and will not be described herein again.

S360, the RAN sends a data packet according to the result of performing the synchronous transmission process on the multiple target data streams. Accordingly, device #A receives the data packet.

S370, Device #A sends the data packet to the application client. Accordingly, the application client receives the data packet.

According to the embodiment of the present application, the RAN may perform synchronous transmission processing on the multiple target data streams, so that the deviation of the transmission progress among the multiple target data streams is less than or equal to the first threshold. Compared with the independent transmission of multiple target data streams, without considering the correlation between each target data stream, the solution of the present application can achieve higher synchronization accuracy among multiple target data streams, thereby improving user experience.

When the core network element performs synchronous transmission of multiple target data streams, first indication information may be sent to the core network element, where the first indication information is used to instruct the core network element to perform synchronous transmission of the multiple target data streams . The first indication information includes identification information of the target data stream and information of the first threshold. The first threshold value may be the maximum value of the deviation of the allowable transmission progress between any two target data streams in the multiple target data streams; or, the first threshold value may be two target data streams specified in the multiple target data streams The maximum value of the deviation of the allowable transmission progress between the streams, and the first threshold may be different for the two specified target data streams at this time.

For example, in a 5G network, the UPF can synchronously transmit multiple target data streams. The following describes the method of sending the first indication information to the UPF:

Way 1:

Corresponding to the mode a, the application client sends the information #A to the SMF through the device #A, the information #A includes the information of the first identifier of each target data stream in the multiple target data streams, and the information #A also includes the first threshold value. information; or, the SMF receives a plurality of information #A, each information #A includes the information of the first identification of a target data stream and the synchronization group identification, and the SMF also receives the information of the synchronization group. The SMF maps multiple target data flows to multiple QoS flows, that is, establishes a correspondence between the first identifiers of the multiple target data flows and the QFI.

When data is transmitted upstream, the SMF sends information #B to the UPF, where the information #B includes information about QFIs and first thresholds corresponding to multiple target data streams. Accordingly, the UPF receives the information #B.

Alternatively, the SMF sends multiple messages #B to the UPF, each message #B includes a QFI corresponding to a target data stream, and in this case, each message #B should also carry a synchronization group identifier. The UPF receives multiple pieces of information #B with the same synchronization group identifier, and determines multiple target data streams that need to be processed for synchronization transmission. The SMF also sends the synchronization group information to the UPF.

When transmitting data upstream, the SMF also needs to send information #E to the device #A, where the information #E includes the correspondence between the first identifier of each target data stream in the multiple target data streams and the QFI. Accordingly, the UPF receives the message #B and the device #A receives the message #E.

When downlinking data, the SMF sends information #H to the UPF, where the information #H includes information about the first identifier of each target data stream in the multiple target data streams, and the information #H also includes information about the first threshold. Alternatively, the SMF sends a plurality of messages #H to the UPF, each message #H includes information about the first identifier of a target data stream and a synchronization group identifier, and the UPF also receives the synchronization group information. The SMF also needs to send information #E to the UPF, where the information #E includes the correspondence between the first identifier of each target data stream in the multiple target data streams and the QFI. Accordingly, the UPF receives information #H and information #E.

Way 2:

Corresponding to the mode a, the application client sends the information #A to the SMF through the device #A, the information #A includes the information of the first identifier of each target data stream in the multiple target data streams, and the information #A also includes the first threshold value. information; or, the SMF receives a plurality of information #A, each information #A includes the information of the first identification of a target data stream and the synchronization group identification, and the SMF also receives the information of the synchronization group. The SMF maps multiple target data flows to multiple sub-flows of the same QoS flow, that is, establishes a correspondence between the first identifiers of the multiple target data flows and the multiple sub-flow identifiers of the same QoS flow.

When transmitting data upstream, the SMF sends information #C to the UPF, where the information #C includes multiple sub-flow identifiers of the same QoS flow and information about the first threshold, and optionally the QFI.

Alternatively, the SMF sends multiple messages #C to the UPF, each message #C includes a sub-flow identifier of a QoS flow, and at this time, each message #C should also carry a synchronization group identifier. The UPF receives multiple pieces of information #C with the same synchronous group identifier, and determines multiple target data streams that need to be processed for synchronous transmission. The SMF also sends the synchronization group information to the UPF.

When transmitting data upstream, SMF also needs to send information #F to device #A, where information #F includes the correspondence between the first identifier of each target data stream in the multiple target data streams and the identifiers of multiple sub-flows of the same QoS stream relation. Accordingly, the UPF receives the information #C and the device #A receives the information #F.

When downlinking data, the SMF sends information #H to the UPF, where the information #H includes information about the first identifier of each target data stream in the multiple target data streams, and the information #H also includes information about the first threshold. Alternatively, the SMF sends a plurality of messages #H to the UPF, each message #H includes information about the first identifier of a target data stream and a synchronization group identifier, and the UPF also receives the synchronization group information. The SMF also needs to send message #F to the UPF. Accordingly, the UPF receives information #H and information #F.

Way 3:

Corresponding to the mode b, the application server sends the information #A to the SMF, the information #A includes the information of the first identifier of each target data stream in the multiple target data streams, and the information #A also includes the information of the first threshold; or, the SMF A plurality of messages #A are received, each message #A includes information of the first identifier of a target data stream and a synchronization group identifier, and the SMF also receives the information of the synchronization group. The SMF maps multiple target data flows to multiple QoS flows, that is, establishes a correspondence between the first identifiers of the multiple target data flows and the QFI.

When transmitting data upstream, similar to Mode 1, the SMF sends information #B to the UPF, and the SMF also needs to send information #E to the device #A. Accordingly, the UPF receives the message #B and the device #A receives the message #E.

When transmitting data in the downlink, similar to Mode 1, the SMF sends the information #H to the UPF, and the SMF also needs to send the information #E to the UPF.

Way 4:

Corresponding to the mode b, the application server sends the information #A to the SMF, the information #A includes the information of the first identifier of each target data stream in the multiple target data streams, and the information #A also includes the information of the first threshold; or, the SMF A plurality of messages #A are received, each message #A includes information of the first identifier of a target data stream and a synchronization group identifier, and the SMF also receives the information of the synchronization group. The SMF maps multiple target data flows to multiple sub-flows of the same QoS flow, that is, establishes a correspondence between the first identifiers of the multiple target data flows and the multiple sub-flow identifiers of the same QoS flow.

When transmitting data in the uplink, similar to Mode 2, the SMF sends the information #C to the UPF, and the SMF also needs to send the information #F to the device #A. Accordingly, the UPF receives the information #C and the device #A receives the information #F.

When transmitting data in the downlink, similar to Mode 2, the SMF sends the information #H to the UPF, and the SMF also needs to send the information #F to the UPF.

The following describes the specific process of synchronous transmission of upstream data of multiple target data streams by UPF, as shown in Figure 5:

S410: The UPF receives the first indication information, and acquires information of the first threshold and identification information of each target data stream in the multiple target data streams.

For example, the UPF may acquire the information of the first threshold and the identification information of each target data stream in the plurality of target data streams in any one of the foregoing manners 1 to 4.

S420, the application client sends a data packet to the device #A. Accordingly, device #A receives the data packet.

S430, Device #A sends a data packet to the RAN. Accordingly, the RAN receives the data packet.

The data packet includes identification information of the target data stream to which the data packet belongs. For example, the identification information may be the QFI or QoS flow sub-flow identification corresponding to the target data flow.

S440, the RAN sends a data packet to the UPF. Accordingly, the UPF receives the data packet.

Optionally, in S455, the UPF determines, according to the identification information of the target data stream to which the data packet belongs, included in the data packet, the target data stream to which the data packet belongs is a target data stream among the multiple target data streams.

S450, the UPF determines information about the transmission progress of each target data stream in the multiple target data streams.

The manner in which the UPF determines the information of the transmission progress of each target data stream in the multiple target data streams is similar to that in S130, and will not be described herein again.

S460, the UPF performs synchronous transmission processing on the multiple target data streams.

This process may be similar to S140, and will not be further described here.

S470, the UPF sends a data packet to the application server according to the result of the synchronous transmission processing on the multiple target data streams.

The following describes the specific process of synchronous transmission of downlink data of multiple target data streams by UPF, as shown in Figure 6:

S510: The UPF receives the first indication information, and acquires information of the first threshold and identification information of each target data stream in the multiple target data streams.

S520, the application server sends a data packet to the UPF. Accordingly, the UPF receives the data packet.

The data packet includes the first identifier of the target data stream to which the data packet belongs.

Optionally, in S525, the UPF determines whether the target data stream to which the data packet belongs is a target data stream among multiple target data streams according to the first identifier of the target data stream to which the data packet belongs.

S530, the UPF determines information on the transmission progress of each target data stream in the multiple target data streams.

S540, the UPF performs synchronous transmission processing on the multiple target data streams.

The manner in which the UPF performs synchronous transmission processing on multiple target data streams may be similar to that in S140, and will not be described herein again.

S550, the UPF sends data packets according to the result of performing the synchronous transmission processing on the multiple target data streams. Accordingly, the RAN receives the data packet.

Similar to S330, the UPF determines the QFI of the QoS flow to which the data packet belongs or the sub-flow identifier of the QoS flow to which the data packet belongs. The UPF encapsulates the packet into a GTP-U packet and sends it to the RAN.

S560, the RAN sends the data packet. Accordingly, device #A receives the data packet.

S570, Device #A sends the data packet to the application client. Accordingly, the application client receives the data packet.

According to the embodiment of the present application, when transmitting data, the UPF may perform synchronous transmission processing on multiple target data streams, so that the deviation of the transmission progress among the multiple target data streams is less than or equal to the first threshold. Compared with the independent transmission of multiple target data streams, without considering the correlation between each target data stream, the solution of the present application can achieve higher synchronization accuracy among multiple target data streams, thereby improving user experience.

When multiple target data streams are transmitted through the same device #A, the same RAN, and the same core network element, the multiple target data streams can be synchronously transmitted by the device #A, RAN or core network element. The process is shown above. It should be understood that in this scenario, multiple targets can also be connected by device #A and RAN, or device #A and core network element, or RAN and core network element, or device #A, RAN and core network element Data streams are transmitted synchronously. The specific process may be a combination of the above-mentioned processes.

The following takes the example of synchronous transmission of downlink data of multiple target data streams through RAN and UPF. When RAN and UPF perform synchronous transmission of downlink data of multiple target data streams, the first The indication information is used to instruct the RAN and the UPF to synchronously transmit multiple target data streams. The first indication information includes identification information of the target data stream and information of the first threshold. As shown in Figure 7:

S610: The RAN receives the first indication information, and obtains information of the first threshold and identification information of each target data stream in the multiple target data streams.

The process may be similar to S310.

For example, the RAN may determine the information of the first threshold and the QFI corresponding to each of the multiple target data streams by receiving the information #B.

S620: The UPF receives the first indication information, and acquires information of the first threshold and identification information of each target data stream in the multiple target data streams.

The process may be similar to S510.

For example, the UPF may determine the information of the first identification of each target data stream in the plurality of target data streams by receiving the information #H, and the information #H further includes the information of the first threshold. The UPF also receives information #E, where the information #E includes the correspondence between the first identifier of each target data stream in the multiple target data streams and the QFI.

S630: The application server sends a data packet, where the data packet includes a first identifier of the target data stream to which the data packet belongs. Accordingly, the UPF receives the data packet.

Optionally, in S635, the UPF determines, according to the first identifier carried in the data packet, whether the target data stream to which the data packet belongs is a target data stream among multiple target data streams.

S640, the UPF determines information about the transmission progress of each target data stream in the multiple target data streams.

S650, the UPF performs synchronous transmission processing on multiple target data streams.

S660, the UPF sends a data packet according to the result of performing the synchronous transmission process on the multiple target data streams. Accordingly, the RAN receives the data packet.

The process is similar to S330.

For example, the UPF determines the QFI of the QoS flow to which the data packet belongs according to the information #E received from the SMF and the first identifier in the data packet, and the UPF encapsulates the data packet into a GTP-U data packet, where the GTP-U The packet includes the QFI corresponding to the data packet.

For another example, the UPF determines the QoS flow sub-flow identifier to which the data packet belongs according to the information #F received from the SMF and the first identifier in the data packet, and the UPF encapsulates the data packet into a GTP-U data packet, wherein the GTP The -U packet includes the QoS flow sub-flow identifier corresponding to the data packet, and optionally, also includes the QFI.

Optionally, in S665, the RAN determines whether the target data flow to which the data packet belongs is a target data flow among multiple target data flows according to the QFI and/or the QoS flow sub-flow identifier carried in the GTP-U of the data packet.

S670: The RAN determines information about the transmission progress of each target data stream in the multiple target data streams.

S680, the RAN performs synchronous transmission processing on the multiple target data streams.

S690, the RAN sends a data packet according to the result of performing the synchronous transmission process on the multiple target data streams. Accordingly, device #A receives the data packet.

S695, Device #A sends the data packet to the application client. Accordingly, the application client receives the data packet.

According to the embodiments of the present application, during downlink data transmission, after the UPF performs synchronous transmission processing on multiple target data streams, if the deviation of the transmission progress among the multiple target data streams is still greater than the first threshold, the RAN may The synchronous transmission processing is performed on the target data streams again, so that the deviation of the transmission progress among the plurality of target data streams is less than or equal to the first threshold. Compared with the independent transmission of multiple target data streams, without considering the correlation between each target data stream, the solution of the present application can achieve higher synchronization accuracy among multiple target data streams, thereby improving user experience.

In some scenarios, multiple target data streams are transmitted through multiple terminal devices, the same RAN, and the same core network element. In this scenario, multiple target data streams can be synchronously transmitted through the RAN, or the core network element, or the RAN and the core network element.

In other scenarios, multiple target data streams are transmitted through multiple terminal devices, multiple RANs, and the same core network element. In this scenario, multiple target data streams may be synchronously transmitted through the core network element, and the specific associated scheduling process may be similar to the above-mentioned process, which will not be described here.

In other scenarios, in the process of transmitting the data packets in the target data stream, the data packets in the target data stream may be lost, and in this case, the data packets need to be retransmitted.

The following introduces a method for retransmitting data packets during uplink transmission, as shown in FIG. 8 .

S710: Device #A receives second indication information, where the second indication information indicates to preferentially send the retransmitted data packets in the target data stream, and the second indication information includes identification information of the target data stream that needs to preferentially transmit the retransmitted data packets.

The following describes the manner in which device #A receives the second indication information:

Way 1:

The application client determines the target data stream that needs to send the retransmitted data packet preferentially, and sends the second indication information to the device #A.

For example, the application client sends the second indication information to the device #A, where the second indication information is used to instruct to preferentially send the retransmitted data packets of the target data stream. The identification information of the target data stream included in the second indication information may be the first identification corresponding to the target data stream.

In a possible manner, after receiving the second indication information, the device #A may also send a session modification request to the SMF, which is used to request the SMF to create a first QoS flow or a first QoS flow with a higher priority for priority retransmission subflow. After receiving the session modification request, the SMF creates a first QoS flow or a first QoS flow sub-flow with a higher priority for the retransmitted data packets of the target data flow, and sends the session modification response information to device #A, the session modification The response information includes the information of the first QoS flow or the first QoS flow sub-flow with the higher priority, and the session response message instructs the device #A to pass the first QoS flow or the first QoS flow sub-flow with the higher priority Send a retransmission packet of the target stream. In a possible manner, the SMF may also send third indication information to the RAN, where the third indication information includes the information of the first QoS flow or the first QoS flow sub-flow with the higher priority, and indicates that the RAN is the first QoS flow with a higher priority. The first QoS flow or sub-flow of the first QoS flow with a higher priority is allocated a dedicated radio bearer.

Way 2:

The application server determines the target data stream that needs to send the retransmitted data packet preferentially, and sends the second indication information to the device #A through the core network element.

For example, in a 5G network, the application server may send retransmission priority information to the SMF, where the retransmission priority information includes the first identifier corresponding to the target data stream. In a possible implementation manner, the application server sends the retransmission priority information to the SMF through the PCF.

After receiving the retransmission priority information, the SMF maps the target data flow to the QoS flow or QoS flow sub-flow and sends second indication information to Device #A, where the second indication information includes the QFI or QoS flow sub-flow corresponding to the target data flow logo.

In another possible implementation manner, after receiving the retransmission priority information, the SMF creates a first QoS flow or a first QoS flow sub-flow with a higher priority for the retransmitted data packets of the target data flow, and sends the information to the device# A sends second indication information, the second indication information includes the information of the first QoS flow or the first QoS flow sub-flow with the higher priority, and the second indication information instructs the device #A to pass the first QoS flow with the higher priority. A QoS flow or a sub-flow of the first QoS flow sends the retransmitted data packets of the target data flow. In a possible manner, the SMF may also send third indication information to the RAN, where the third indication information includes the information of the first QoS flow or the first QoS flow sub-flow with the higher priority, and indicates that the RAN is the first QoS flow with a higher priority. The first QoS flow or sub-flow of the first QoS flow with a higher priority is allocated a dedicated radio bearer.

S720, the application client determines that a certain data packet needs to be retransmitted, and sends the retransmitted data packet to device #A. The retransmission data packet includes a retransmission mark, and optionally may also include identification information of the target data stream to which the retransmission data packet belongs. Accordingly, device #A receives the retransmitted data packet.

It should be understood that the method for the application client to determine that a certain data packet needs to be retransmitted may be similar to the prior art. For example, if the TCP layer corresponding to the application client senses that a certain data packet is lost, it determines that the data packet needs to be retransmitted.

Optionally, in S725, device #A determines, according to the identification information of the target data stream to which the retransmitted data packet belongs, that the retransmitted data packet transmitted on the target data stream needs to be sent preferentially.

S730, Device #A preferentially sends the retransmitted data packet.

The following describes how Device #A preferentially sends the retransmitted packet:

Way 1:

Device #A determines the target data stream to which the retransmitted data packet belongs, increases the priority of the target data stream, and preferentially sends the data packets that need to be transmitted on the target data stream.

Way 2:

Device #A determines the target data stream to which the retransmitted data packet belongs, and places the retransmitted data packet at the top of the queue corresponding to the target data stream. When sending the data packet on the target data stream, the retransmitted data packet may be sent preferentially. It should be understood that the data packet at the top of the queue is the next data packet to be sent in the queue.

When there are multiple retransmitted data packets that need to be retransmitted, and the multiple retransmitted data packets belong to multiple target data streams, after the multiple retransmitted data packets are inserted into the top of the queue of the corresponding target data stream, the number of The priority of each target data stream, the retransmission data packets on the target data stream with higher priority are sent first.

In a possible implementation manner, device #A can increase the priority of the target data flow while inserting the retransmitted data packet into the top of the queue corresponding to the target data flow.

Way 3:

Device #A adds a retransmission queue locally, and the priority of this retransmission queue is higher than that of other queues. The retransmission queue is a queue corresponding to the first QoS flow or the sub-flow of the first QoS flow with a higher priority. The creation method of the first QoS flow or the first QoS flow sub-flow with the higher priority is introduced in S710. For example, the retransmission queue may be created by a request from device #A, that is, device #A sends a session modification request to the SMF for creating a first QoS flow or a first QoS flow sub-flow with a higher priority for priority retransmission Or, the core network element (such as SMF) determines according to the retransmission priority information to create a first QoS flow or a first QoS flow sub-flow with a higher priority for the priority retransmission, and the retransmission queue is the one specially used for the priority retransmission. Queue corresponding to the transmitted first QoS flow or the first QoS flow sub-flow. This application does not limit how to establish the retransmission queue.

Device #A sends the retransmission data packet through the retransmission queue, the RAN allocates resources to the retransmission queue preferentially, and sends the retransmission data packet after the RAN allocates uplink resources to the retransmission queue.

When there are multiple retransmitted data packets that need to be retransmitted, and the multiple retransmitted data packets belong to multiple target data streams, the multiple retransmitted data packets can be processed according to the priority of the multiple target data streams in the retransmission queue. Sorting is performed, and the retransmission data packets in the retransmission queue are preferentially sent in order. Alternatively, retransmission queues with different priorities are respectively created for the multiple target data streams with different priorities, and the retransmission data packets of each target data stream are respectively sent through the respective retransmission queues.

It should be understood that during uplink transmission of data, the RAN or the core network element may also send retransmission data packets in a similar manner, which will not be described in detail here.

The following introduces a method for retransmitting data packets during downlink transmission, as shown in FIG. 9 .

S810: The RAN receives second indication information, where the second indication information indicates to preferentially send the retransmitted data packets that need to be retransmitted in the target data stream, and the second indication information includes identification information of the target data stream that needs to preferentially send the retransmitted data packets .

The following describes the manner in which the RAN receives the second indication information:

For example, in a 5G network, the application server determines the target data stream that needs to send retransmission packets preferentially, and the application server sends retransmission priority information to the SMF. The retransmission priority information includes the target data stream that needs to send retransmission packets preferentially. the first identification.

In a possible implementation manner, the SMF maps the target data flow that needs to preferentially send retransmitted data packets to the QoS flow, and sends second indication information to the RAN, where the second indication information includes the target data flow that needs to be preferentially retransmitted. The corresponding QFI of the packet. At this time, the SMF also needs to send information #J to the UPF, where the information #J includes the corresponding relationship between the first identifier of the target data stream that needs to send the retransmitted data packet preferentially and the QFI. Optionally, the information #J further includes a retransmission flag.

In another possible implementation manner, the SMF maps the target data flow that needs to send retransmission packets preferentially to the sub-flow of the QoS flow, and sends second indication information to the RAN, where the second indication information includes the target data flow The identifier of the QoS flow sub-flow corresponding to the data packet that needs to be retransmitted preferentially. At this time, the SMF also needs to send the information #K to the UPF, and the information #K includes the first identifier of the target data flow that needs to send the retransmitted data packet preferentially and the QoS flow. Correspondence of subflow identifiers. Optionally, the information #K further includes a retransmission flag.

In another possible implementation manner, after receiving the retransmission priority information, the SMF creates a first QoS flow or a first QoS flow sub-flow with a higher priority for the retransmission data packet of the target data flow, and sends it to the RAN Second indication information, where the second indication information includes the information of the first QoS flow or the sub-flow of the first QoS flow with a higher priority, and the second indication information is used to instruct the RAN to retransmit the data in the target data flow that needs to be retransmitted. The retransmission data packet is sent through the first QoS flow or the first QoS flow sub-flow with the higher priority. Optionally, the RAN can be instructed to allocate the first QoS flow or the first QoS flow sub-flow with the higher priority Dedicated radio bearer.

S820, the application server determines that a certain data packet needs to be retransmitted, adds a retransmission mark to the retransmitted data packet, and sends the retransmitted data packet to the core network element. Correspondingly, the core network element receives the retransmitted data packet. Optionally, the retransmission data packet may further include identification information of the target data stream to which the retransmission data packet belongs.

For example, in a 5G network, the application server can send this retransmission packet to the UPF. Accordingly, the UPF receives the retransmitted packet.

The UPF identifies the retransmitted data packet of the target data flow according to the first identifier and the retransmission flag. The UPF determines the QFI corresponding to the retransmitted data packet according to the information #J or the QoS flow sub-flow identifier corresponding to the retransmitted data packet according to the information #K, and the UPF encapsulates the retransmitted data packet into the GTP- U, wherein the GTP-U packet includes QFI and/or sub-flow identifier.

In another possible implementation manner, the method may not execute S820. After S810, the method includes S825, the core network element determines the retransmitted data packet that needs to be retransmitted, and the core network element is retransmitting the data packet. Add the retransmission flag to .

For example, in a 5G network, the retransmission packets that need to be retransmitted can be determined by the UPF. In this case, the UE may establish a connection with the UPF, for example, the UE may obtain the IP address of the UPF through the SMF, and initiate a connection request to the UPF. After the UE establishes a connection with the UPF, the UPF can determine whether the data packet needs to be retransmitted. That is, at this time, the UPF is an application layer proxy between the UE and the application server, such as an HTTP proxy or a TCP proxy. An end-to-end connection is established between the UE and the UPF, and the retransmission of the data packet is determined by the UPF.

In S820, the application server determines whether the data packet needs to be retransmitted. In this case, when the application server is maliciously attacked and fails, the application server may add a retransmission mark to the sent data packet at will, for example, in each data packet sent A retransmission marker is added to the packet. In contrast, in S825, the core network element determines whether the data packet needs to be retransmitted, so as to avoid the occurrence of the above situation.

S830, the core network element sends the retransmission data packet to the RAN. Accordingly, the RAN receives the retransmitted data packet.

The retransmission data packet includes a retransmission flag and identification information of the target data stream to which the retransmission data packet belongs.

For example, in a 5G network, the identification information of the target data flow to which the retransmitted data packet belongs included in the retransmission data packet sent by the UPF to the RAN may be the QFI or QoS flow corresponding to the target data flow to which the retransmitted data packet belongs Subflow ID.

S840, the RAN preferentially sends the retransmitted data packets.

The RAN can preferentially send the retransmitted data packet in a similar manner as in S730, that is, the RAN can determine the target data stream to which the retransmitted data packet belongs, increase the priority of the target data stream, and preferentially send the data that needs to be transmitted on the target data stream or, the RAN places the retransmitted data packet at the top of the queue corresponding to the target data stream; or, if the RAN places the retransmitted data packet in the target data stream that needs to be retransmitted in the first place with the higher priority The retransmission queue corresponding to the QoS flow or the sub-flow of the first QoS flow allocates a dedicated radio bearer to the first QoS flow or sub-flow of the first QoS flow with a higher priority, and the RAN sends the data packets that need to be retransmitted through the dedicated radio bearer.

According to the embodiment of the present application, when there is a retransmitted data packet, the retransmitted data packet may be sent preferentially. Compared with the data packets in the target data stream that are transmitted according to the first-in, first-out principle, the retransmitted data packets need to wait for a long time in the target data stream to which the retransmitted data packets belong before being sent. By adopting the technical solution of the present application, it is possible to solve the problems that the retransmitted data packets cannot be sent in time, which leads to the connection interruption and freeze at the application layer of the application server, thereby improving the user experience.

The following introduces a specific process of the associated scheduling of data transmission on multiple target data streams by the RAN, as shown in FIG. 10 . Taking the target data stream as a video stream as an example, each video stream includes multiple groups of pictures (GOPs), and a GOP starts with an intra-coded picture (I-frame for short) Frame, a GOP generally also includes a predictive-coded picture frame (predictive-coded picture), abbreviated as P frame. Wherein, the transmission resources required for transmitting an I frame in one GOP are generally greater than the transmission resources required for transmitting a P frame in one GOP.

S910, the application server sends information #G to the RAN, where the information #G is used to indicate the average frame rate and average GOP size of each video stream in the multiple video streams.

For example, in a 5G network, the application server can send the message #G to the RAN through PCF and SMF.

S920, the RAN determines information on the transmission progress of each target data stream in the multiple target data streams, and adjusts the radio resource allocation.

In a possible implementation manner, if the RAN determines that the frame currently transmitted by the first target data stream is an I frame, it can be estimated that the arrival of the next I frame is combined with the average GOP size and the average frame rate corresponding to the first target data stream. time, thereby adjusting the allocation of radio resources, scheduling radio resources for the transmission of the next I frame, so that there are enough resources for transmission when the next I frame arrives.

For example, if the RAN determines that the frame currently transmitted by the first target data stream is an I frame, the average GOP size is 3 frames, and the average frame rate is 10 frames/s, the RAN can estimate the arrival time of the next I frame, thereby adjusting the radio resources allocation.

S930, the RAN controls the transmission of the multiple target data streams according to the information on the transmission progress of each target data stream in the multiple target data streams.

For example, when multiple I-frames of multiple target data streams arrive at the RAN, due to limited air interface resources and large resources required to transmit I-frames, the RAN may not be able to transmit multiple I-frames of multiple target data streams at the same time. At this time, the RAN may transmit the I-frames on the multiple target data streams in batches when the transmission progress between the multiple target data streams is less than or equal to the first threshold. For example, the I frame of the first target data stream and the second target data stream among the multiple target data streams may be transmitted first, and then the I frames of the third target data stream and the fourth target data stream among the multiple target data streams may be transmitted. The transmission order may be an order obtained by sorting the priorities of multiple target data streams.

According to the embodiment of the present application, the RAN can dynamically adjust the allocation of radio resources according to the transmission status of the target data flow, realize the pre-allocation of the radio resources before the data arrives, and allow the transmission progress between multiple target data flows. The allocation of wireless resources can be adjusted within the range to realize peak shift scheduling.

According to the foregoing method, FIG. 11 is a schematic block diagram of a communication device provided by an embodiment of the present application. The communication device includes a transceiver unit 1110 and a processing unit 1120 . The communication device may be a terminal device, a RAN, or a UPF involved in the embodiments of the present application.

When the communication device in FIG. 11 is a terminal device, the transceiver unit 1110 and the processing unit 1120 can support the communication device to perform the actions performed by the terminal device in the above method examples. For example, the transceiver unit 1110 can support the communication device to perform S110, S150 in FIG. 2, and/or other processes for the techniques described herein; the processing unit 1120 can support the communication device to perform S130, S140, and/or other processes in FIG. 2 or other procedures for the techniques described herein.

When the communication device in FIG. 11 is the RAN, the transceiver unit 1110 and the processing unit 1120 can support the communication device to perform the actions completed by the RAN in the above method examples. For example, transceiving unit 1110 can support communication devices to perform S210, S230, S260 in FIG. 3, S310, S330, S360 in FIG. 4, and/or other processes for the techniques described herein; processing unit 1120 can support communication The apparatus performs S240, S250 in FIG. 3, S340, S350 in FIG. 4, and/or other processes for the techniques described herein.

When the communication device in Fig. 11 is a UPF, the transceiver unit 1110 and the processing unit 1120 can support the communication device to perform the actions completed by the UPF in the above method examples. For example, the transceiver unit 1110 can support the communication device to perform S410, S440, S470 in FIG. 5, and/or other processes for the techniques described herein; the processing unit 1120 can support the communication device to perform S450, S460 in FIG. 5, and/or other processes for the techniques described herein.

When the communication device in FIG. 11 is an SMF, the transceiver unit 1110 and the processing unit 1120 can support the communication device to perform the actions completed by the SMF in the above method examples. For example, the processing unit 1120 may generate first indication information, where the first indication information is used to indicate synchronous transmission of multiple target data streams; the transceiver unit 1110 may send the first indication information to the first device.

According to the foregoing method, FIG. 12 is a schematic block diagram of a communication device provided by an embodiment of the present application. The communication device includes a memory 1210 for storing a computer program and a processor 1220 for invoking and executing the computer program from the memory. The communication device can be used to implement the functions of the terminal device, RAN, UPF or SMF in the above method.

Those of ordinary skill in the art can realize that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functionality using different methods for each particular application, but such implementations should not be considered beyond the scope of this application.

Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the above-described systems, devices and units may refer to the corresponding processes in the foregoing method embodiments, which will not be repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the apparatus embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not implemented. On the other hand, the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit.

The functions, if implemented in the form of software functional units and sold or used as independent products, may be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application can be embodied in the form of a software product in essence, or the part that contributes to the prior art or the part of the technical solution. The computer software product is stored in a storage medium, including Several instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disk and other media that can store program codes .

The above are only specific embodiments of the present application, but the protection scope of the present application is not limited to this. should be covered within the scope of protection of this application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

A method for transmitting data, comprising:

The first device acquires first indication information, where the first indication information is used to indicate synchronous transmission of multiple target data streams;

The first device performs synchronous transmission processing on at least one target data stream in the plurality of target data streams according to the first indication information, so that the deviation of the transmission progress among the plurality of target data streams is less than or equal to the first threshold.
The method according to claim 1, wherein the deviation of the transmission progress among the multiple target data streams comprises one or more of the following:

The deviation of the transmission frame numbers among the multiple target data streams, the deviation of the timestamps among the multiple target data streams, and the deviation of the time consumed by the multiple target data streams to transmit the preset data amount.
The method according to claim 1 or 2, wherein the first indication information is one, and the first indication information includes identification information of each target data stream in the plurality of target data streams; or

The first indication information is multiple, and the multiple first indication information is in one-to-one correspondence with the multiple target data streams, and each first indication information includes identification information of the corresponding target data stream;

Wherein, the identification information of the target data stream includes at least one of the following parameters:

The quintuple information corresponding to the target data flow, the information of the quality of service QoS flow identification information corresponding to the target data flow, or the information of the QoS flow sub-flow identification information corresponding to the target data flow.
The method according to any one of claims 1-3, wherein the plurality of target data streams belong to a first synchronization group among a plurality of synchronization groups, wherein each synchronization group includes at least two targets data streams, where target data streams in the same isochronous group need to be transmitted synchronously, and

The first indication information further includes the identifier of the first synchronization group.
The method according to any one of claims 1-4, wherein the first indication information further includes indication information of the first threshold.
The method according to any one of claims 1-5, wherein,

The synchronous transmission processing on the multiple target data streams includes:

When the deviation of the transmission progress between the first target data stream of the plurality of target data streams and the second target data stream of the plurality of target data streams is greater than the first threshold, and the first target data stream When the transmission progress of the data stream is faster than the transmission progress of the second target data stream, the first device stops sending the data packets in the first target data stream, where the second target data stream is the multiple Target data streams other than the first target data stream in the target data stream.
The method of claim 6, wherein:

The method also includes:

After a preset first period of time has elapsed since the sending of the data packets in the first target data stream is stopped, if the deviation of the transmission progress between the first target data stream and the second target data stream is still greater than the first threshold, the first device sends the data packets in the first target data stream; or

The preset first time period has not been reached since the sending of the data packets in the first target data stream is stopped, and the deviation of the transmission progress between the first target data stream and the second target data stream is less than or equal to the first threshold, the first device sends the data packets in the first target data stream.
The method according to any one of claims 1-7, wherein,

The synchronous transmission processing on the multiple target data streams includes:

When the deviation of the transmission progress between the first target data stream of the plurality of target data streams and the second target data stream of the plurality of target data streams is greater than the first threshold, and the first target data stream When the transmission progress of the data stream is faster than the transmission progress of the second target data stream, the first device discards the next data packet to be sent of the second target data stream.
The method according to any one of claims 1-8, wherein the first device comprises a terminal device,

The acquiring, by the first device, the first indication information includes:

The first device receives the first indication information from a session management network element; or

The first device receives the first indication information through a first interface, where the first interface is an interface between the first device and an application client, and the application client transmits all information through the first device. Describe multiple target data streams.
The method according to any one of claims 1-8, wherein the first device comprises an access network device or a user plane network element, and

The receiving, by the first device, the first indication information includes:

The first device receives the first indication information from a session management network element.
The method according to any one of claims 1-5, wherein the first device is an access network device, and

The method also includes:

receiving, by the first device, first request information, the first request information requesting to allocate a first radio resource for a first target data stream in the plurality of target data streams;

The synchronous transmission processing on the multiple target data streams includes:

When the deviation of the transmission progress between the first target data stream and the second target data stream is greater than the first threshold, and the transmission progress of the first target data stream is faster than the transmission of the second target data stream when the first device stops allocating the first radio resource for the first target data stream, wherein the second target data stream is the target data stream except the first target data stream among the multiple target data streams target data stream outside of the
The method of claim 11, wherein:

The first request information includes the information of the frame number corresponding to the first data packet or the information of the timestamp corresponding to the first data packet, and the first data packet is the next to-be-sent data packet of the first target data stream .
The method according to claim 11 or 12, wherein,

Before or at the same time as receiving the first request information, the first device further receives second request information, the second request information requests to allocate a second radio resource for the second target data stream, the second request information The information includes the information of the frame number corresponding to the second data packet or the information of the timestamp corresponding to the second data packet, and the second data packet is the next data packet to be sent in the second target data stream.
The method of claim 13, wherein:

The first request information also includes first buffer information of the first target data stream, where the first buffer information is the total amount of data to be sent of the frame corresponding to the first data packet, and the second buffer information The request information further includes second buffer information of the second target data stream, where the second buffer information is the total amount of data to be sent of the frame corresponding to the second data packet.
The method according to any one of claims 6-14, wherein the deviation of the transmission progress between the first target data stream and the second target data stream comprises:

The deviation between the frame number corresponding to the first data packet and the frame number corresponding to the second data packet; or

the deviation between the timestamp corresponding to the first data packet and the timestamp corresponding to the second data packet; or

The deviation between the time consumed by the first target data stream to transmit the first preset data amount and the time consumed by the second target data stream to transmit the second preset data amount, wherein the first indication information further includes The preset sending rate of the first target data stream and the preset sending rate of the second target data stream, the ratio of the first preset data amount to the second preset data amount is a first ratio, The ratio of the preset sending rate of the first target data stream to the preset sending rate of the second target data stream is a second ratio, and the first ratio is associated with the second ratio;

The first data packet is the next data packet to be sent in the first target data stream, and the second data packet is the next data packet to be sent in the second target data stream.
The method according to any one of claims 13-15, wherein the first data includes information of a frame number corresponding to the first data packet, and the second data includes the second data packet information about the corresponding frame number; or

The frame number corresponding to the first data packet is determined by the frame header identifier and the frame end identifier in the first target data stream, and the frame number corresponding to the second data packet is determined by the frame in the second target data stream. The header flag and the frame end flag are determined.
The method according to any one of claims 1-16, wherein the method further comprises:

receiving, by the first device, second indication information, where the second indication information is used to instruct to preferentially send data packets that need to be retransmitted in the target data stream;

The first device sends the data packet that needs to be retransmitted according to the second indication information, wherein the sending time of the data packet that needs to be retransmitted is earlier than that of other data packets to be sent in the target data stream sending time.
The method according to claim 17, wherein the sending the data packet that needs to be retransmitted comprises:

Place the data packet that needs to be retransmitted at the top of the queue corresponding to the target data flow, and send the data packet that needs to be retransmitted; or

Put the data packets that need to be retransmitted in a retransmission queue, and send the data packets that need to be retransmitted, and the retransmission queue belongs to the first QoS flow or the first QoS sub-flow, wherein the first QoS flow The priority of the flow is higher than the priority of the QoS flow corresponding to the target data flow, and the priority of the first QoS sub-flow is higher than the priority of the QoS sub-flow corresponding to the target data flow.
A communication method, comprising:

generating first indication information, where the first indication information is used to indicate synchronous transmission of multiple target data streams;

Send the first indication information to a first device, where the first device is configured to perform synchronous transmission processing on at least one target data stream in the multiple target data streams, so that the The deviation of the transmission progress is less than or equal to the first threshold.
The method according to claim 19, wherein the deviation of the transmission progress among the multiple target data streams comprises one or more of the following:

The deviation of the transmission frame numbers among the multiple target data streams, the deviation of the timestamps among the multiple target data streams, and the deviation of the time consumed by the multiple target data streams to transmit the preset data amount.
The method according to claim 19 or 20, wherein the first indication information is one, and the first indication information includes identification information of each target data stream in the plurality of target data streams; or

The first indication information is multiple, and the multiple first indication information is in one-to-one correspondence with the multiple target data streams, and each first indication information includes identification information of the corresponding target data stream;

Wherein, the identification information of the target data stream includes at least one of the following parameters:

The quintuple information corresponding to the target data flow, the information of the quality of service QoS flow identification information corresponding to the target data flow, or the information of the QoS flow sub-flow identification information corresponding to the target data flow.
The method according to any one of claims 19-21, wherein the plurality of target data streams belong to a first synchronization group among a plurality of synchronization groups, wherein each synchronization group includes at least two targets data streams, where target data streams in the same isochronous group need to be transmitted synchronously, and

The first indication information further includes the identifier of the first synchronization group.
The method according to any one of claims 19-22, wherein the first indication information further includes indication information of the first threshold.
The method according to any one of claims 19-23, wherein the first indication information further includes a preset sending rate of each target data stream in the multiple target data streams.
A device for transmitting data, comprising:

a transceiver unit, configured to acquire first indication information, where the first indication information is used to indicate synchronous transmission of multiple target data streams;

a processing unit, configured to perform synchronous transmission processing on at least one target data stream in the plurality of target data streams according to at least the first indication information, so as to make the transmission progress deviation among the plurality of target data streams less than or equal to the first threshold.
The apparatus according to claim 25, wherein the deviation of the transmission progress between the multiple target data streams comprises one or more of the following:

The deviation of the transmission frame numbers among the multiple target data streams, the deviation of the timestamps among the multiple target data streams, and the deviation of the time consumed by the multiple target data streams to transmit the preset data amount.
The apparatus according to claim 25 or 26, wherein the first indication information is one, and the first indication information includes identification information of each target data stream in the plurality of target data streams; or

The first indication information is multiple, and the multiple first indication information is in one-to-one correspondence with the multiple target data streams, and each first indication information includes identification information of the corresponding target data stream;

Wherein, the identification information of the target data stream includes at least one of the following parameters:

The quintuple information corresponding to the target data flow, the information of the quality of service QoS flow identification information corresponding to the target data flow, or the information of the QoS flow sub-flow identification information corresponding to the target data flow.
The apparatus according to any one of claims 25-27, wherein the plurality of target data streams belong to a first synchronization group among a plurality of synchronization groups, wherein each synchronization group includes at least two targets data streams, where target data streams in the same isochronous group need to be transmitted synchronously, and

The first indication information further includes the identifier of the first synchronization group.
The apparatus according to any one of claims 25-28, wherein the first indication information further includes indication information of the first threshold.
The device according to any one of claims 25-29, characterized in that,

The processing unit is further configured to: when the deviation of the transmission progress between the first target data stream in the plurality of target data streams and the second target data stream in the plurality of target data streams is greater than the first target data stream threshold, and when the transmission progress of the first target data stream is faster than the transmission progress of the second target data stream, it is determined to stop sending the data packets in the first target data stream, where the second target data stream is A target data stream other than the first target data stream among the plurality of target data streams.
The apparatus of claim 30, wherein:

The processing unit is further configured to, after a preset first period of time elapses since stopping sending the data packets in the first target data stream, if there is a gap between the first target data stream and the second target data stream The deviation of the transmission progress is still greater than the first threshold, and it is determined to send the data packets in the first target data stream; or

The processing unit is further configured to: the preset first time period has not been reached since the data packets in the first target data stream are stopped, and the difference between the first target data stream and the second target data stream is not reached. If the deviation of the transmission progress between them is less than or equal to the first threshold, it is determined to send the data packets in the first target data stream.
The device according to any one of claims 25-31, characterized in that,

The processing unit is further configured to: when the deviation of the transmission progress between the first target data stream in the plurality of target data streams and the second target data stream in the plurality of target data streams is greater than the first target data stream The threshold value is set, and when the transmission progress of the first target data stream is faster than the transmission progress of the second target data stream, it is determined to discard the next data packet to be sent of the second target data stream.
The apparatus according to any one of claims 25-32, wherein the apparatus comprises a terminal device, and

The transceiver unit receives the first indication information from the session management network element; or

The terminal device receives the first indication information through a first interface, where the first interface is an interface between the terminal device and an application client, and the application client transmits the multiple target data stream.
The apparatus according to any one of claims 25-32, wherein the apparatus comprises an access network device or a user plane network element, and

The transceiver unit receives the first indication information from the session management network element.
The apparatus according to any one of claims 25-29, wherein the apparatus is an access network device, and

The transceiver unit is configured to receive first request information, the first request information requesting to allocate a first wireless resource for the first target data stream in the plurality of target data streams;

The processing unit is configured to: when the deviation of the transmission progress between the first target data stream and the second target data stream is greater than the first threshold, and the transmission progress of the first target data stream is higher than the When the transmission of the second target data stream is fast, stop allocating the first radio resource for the first target data stream, wherein the second target data stream is the first target data stream except the first target data stream. A target data stream other than the target data stream.
The apparatus of claim 35, wherein:

The first request information includes the information of the frame number corresponding to the first data packet or the information of the timestamp corresponding to the first data packet, and the first data packet is the next to-be-sent data packet of the first target data stream .
The device according to claim 35 or 36, characterized in that,

Before or at the same time as receiving the first request information, the transceiver unit is further configured to receive second request information, the second request information requests to allocate a second radio resource for the second target data stream, the second request information The request information includes the information of the frame number corresponding to the second data packet or the information of the timestamp corresponding to the second data packet, and the second data packet is the next data packet to be sent in the second target data stream.
The apparatus of claim 37, wherein:

The first request information also includes first buffer information of the first target data stream, where the first buffer information is the total amount of data to be sent of the frame corresponding to the first data packet, and the second buffer information The request information further includes second buffer information of the second target data stream, where the second buffer information is the total amount of data to be sent of the frame corresponding to the second data packet.
The method according to any one of claims 30-38, wherein the deviation of the transmission progress between the first target data stream and the second target data stream comprises:

The deviation between the frame number corresponding to the first data packet and the frame number corresponding to the second data packet; or

the deviation between the timestamp corresponding to the first data packet and the timestamp corresponding to the second data packet; or

The deviation between the time consumed by the first target data stream to transmit the first preset data amount and the time consumed by the second target data stream to transmit the second preset data amount, wherein the first indication information further includes The preset sending rate of the first target data stream and the preset sending rate of the second target data stream, the ratio of the first preset data amount to the second preset data amount is a first ratio, The ratio of the preset sending rate of the first target data stream to the preset sending rate of the second target data stream is a second ratio, and the first ratio is associated with the second ratio;

The first data packet is the next data packet to be sent in the first target data stream, and the second data packet is the next data packet to be sent in the second target data stream.
The method according to any one of claims 37-39, wherein the first data includes information of a frame number corresponding to the first data packet, and the second data includes the second data packet information about the corresponding frame number; or,

The frame number corresponding to the first data packet is determined by the frame header identifier and the frame end identifier in the first target data stream, and the frame number corresponding to the second data packet is determined by the frame in the second target data stream. The header flag and the frame end flag are determined.
The device according to any one of claims 25-40, characterized in that,

The transceiver unit is further configured to receive second indication information, where the second indication information is used to instruct to preferentially send data packets that need to be retransmitted in the target data stream;

The transceiver unit is further configured to send the data packet that needs to be retransmitted according to the second indication information, wherein the sending time of the data packet that needs to be retransmitted is earlier than other to-be-sent data packets in the target data stream. The time when the packet was sent.
The apparatus of claim 41, wherein

The processing unit is further configured to place the data packet that needs to be retransmitted at the top of the queue corresponding to the target data flow; or

The processing unit is further configured to place the data packet that needs to be retransmitted in a retransmission queue, where the retransmission queue belongs to the first QoS flow or the first QoS sub-flow, wherein the priority of the first QoS flow is The priority of the first QoS sub-flow is higher than the priority of the QoS sub-flow corresponding to the target data flow.
A communication device, comprising:

a processing unit, configured to generate first indication information, where the first indication information is used to indicate synchronous transmission of multiple target data streams;

A transceiver unit, configured to send the first indication information to a first device, where the first device is configured to perform synchronous transmission processing on at least one target data stream in the multiple target data streams, so that the multiple target data streams can be transmitted synchronously. The deviation of the transmission progress between the target data streams is less than or equal to the first threshold.
The apparatus according to claim 43, wherein the deviation of the transmission progress between the multiple target data streams comprises one or more of the following:

The deviation of the transmission frame numbers among the multiple target data streams, the deviation of the timestamps among the multiple target data streams, and the deviation of the time consumed by the multiple target data streams to transmit the preset data amount.
The apparatus according to claim 43 or 44, wherein the first indication information is one, and the first indication information includes identification information of each target data stream in the plurality of target data streams; or

The first indication information is multiple, and the multiple first indication information is in one-to-one correspondence with the multiple target data streams, and each first indication information includes identification information of the corresponding target data stream;

Wherein, the identification information of the target data stream includes at least one of the following parameters:

The quintuple information corresponding to the target data flow, the information of the quality of service QoS flow identification information corresponding to the target data flow, or the information of the QoS flow sub-flow identification information corresponding to the target data flow.
The apparatus according to any one of claims 43-45, wherein the plurality of target data streams belong to a first synchronization group among a plurality of synchronization groups, wherein each synchronization group includes at least two targets data streams, where target data streams in the same isochronous group need to be transmitted synchronously, and

The first indication information further includes the identifier of the first synchronization group.
The apparatus according to any one of claims 43-46, wherein the first indication information further includes indication information of the first threshold.
The apparatus according to any one of claims 43-47, wherein the first indication information further includes a preset sending rate of each target data stream in the multiple target data streams.
A computer-readable storage medium, characterized in that a computer program is stored on the computer-readable storage medium, and when the computer program runs,

causing the apparatus to perform the method of any one of claims 1-18; or

The apparatus is caused to perform the method of any of claims 19-24.
A computer program product, characterized in that the computer program product comprises: computer program code, when the computer program code is executed by a computer,

causing the computer to perform the method of any one of claims 1-18; or

The computer is caused to perform the method of any of claims 19-24.
A chip, characterized in that the chip is provided with a processing circuit,

the processing circuit for performing the method of any one of claims 1-18; or

The processing circuit is adapted to perform the method of any of claims 19-24.
A communication device, comprising:

memory for storing computer programs;

a processor for invoking and running the computer program from the memory, causing the communication device to implement the method of any one of claims 1-18; or

The communication device is caused to implement the method of any of claims 19-24.