CN114125954A - Data transmission method, system and base station - Google Patents
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Abstract
The disclosure discloses a data transmission method, a system and a base station, and relates to the technical field of wireless communication. The method comprises the following steps: after receiving switching request confirmation information fed back by the candidate target base station, sending user data and first Serial Number (SN) state information to the candidate target base station, wherein the first SN state information comprises SN state information of the data; sending second SN state information to the candidate target base station under the condition that a triggering condition is met, wherein the second SN state information is configured to indicate the candidate target base station to discard data transmitted by the source base station and the terminal; and after receiving a handover success message sent by a target base station which establishes connection with the terminal in the candidate target base stations, sending third SN state information to the target base station, wherein the third SN state information comprises a first serial number of data transmitted by the target base station and the terminal. The method and the device can reduce the cache load of the candidate target base station side and avoid the packet loss problem caused by network overload.
Description
Technical Field
The present disclosure relates to the field of wireless communication technologies, and in particular, to a data transmission method, a system, and a base station.
Background
In recent years, wireless communication technology has experienced rapid development. The demand for mobile communication services is also increasing, and in addition to the conventional voice and internet data services, many services having various QoS (Quality of Service) requirements are also being generated. For example, certain services require ultra-high reliability and ultra-low latency, including remote control, industrial automation, AR (Augmented Reality) and VR (Virtual Reality). For such services, mobile performance should be guaranteed as much as possible, including enhanced reliability and reduced interruption latency.
With the increase of the deployment density of the base station, due to the number and radius of the cells, the UE (User Equipment) may experience more frequent handover, and therefore, the mobility process in the LTE (Long Term Evolution) and NR (New Radio over the air) systems needs to be further enhanced, so as to meet the requirements of the UE on high reliability and very low handover interruption delay.
Currently, the 3GPP RAN2 and RAN3 working groups have studied the mobility enhancement problem in LTE and NR networks, and the protocol provides for supporting the following two handover methods:
CHO (Conditional Handover), in the Handover mode, the terminal starts a periodic measurement process under a lower threshold, detects the quality of received signals of surrounding candidate cells, and immediately starts a Handover execution process when a certain candidate cell meets a high threshold, so as to Handover to a target cell.
In the DAPS HO (Dual Active Protocol Stack Handover), in the Handover mode, the terminal maintains connection with the source base station in the process of synchronizing with the target base station, and disconnects connection with the source base station after the terminal successfully performs data transmission in synchronization with the target base station.
Currently, the 3GPP standardization working group has explicitly introduced these two handover methods as mobility enhancement schemes in the 3GPP R16 protocol, and supports simultaneous configuration of the above two handover methods. Meanwhile, in order to reduce the interruption delay of Data transmission, even to implement the zero delay of Data transmission, the 3GPP defines an Early Data Forwarding (advanced Data Forwarding) mechanism.
In the current flow description of the protocol for Early data forwarding, the time from the source base station to the candidate target base station to the terminal to successfully establish connection with the target base station to transmit data is unpredictable, and particularly under condition switching, the target base station or the candidate target base station needs to store user data in the time, which increases the buffer pressure of the base station and causes unnecessary resource waste. In addition, when the network load of the target base station or the candidate target base station is large, the data in the cache may be discarded, and data loss may be caused.
Disclosure of Invention
A technical problem to be solved by the present disclosure is to provide a data transmission method, system and base station, which can avoid the packet loss problem caused by network overload.
According to an aspect of the present disclosure, a data transmission method is provided, including: after receiving switching request confirmation information fed back by the candidate target base station, sending user data and first Serial Number (SN) state information to the candidate target base station, wherein the first SN state information comprises SN state information of the data; sending second SN state information to the candidate target base station under the condition that a triggering condition is met, wherein the second SN state information is configured to indicate the candidate target base station to discard data transmitted by the source base station and the terminal; and after receiving a handover success message sent by a target base station which establishes connection with the terminal in the candidate target base stations, sending third SN state information to the target base station, wherein the third SN state information comprises a first serial number of data transmitted by the target base station and the terminal.
In some embodiments, sending the second SN status information to the candidate target base station when the trigger condition is met includes: and after receiving the SN state updating request sent by the candidate target base station, sending second SN state information to the candidate target base station.
In some embodiments, sending the second SN status information to the candidate target base station when the trigger condition is met includes: and sending second SN state information to the candidate target base station after sending data to the candidate target base station for a preset time.
In some embodiments, the SN status update request sent by the candidate target base station is received through an X2/Xn interface.
In some embodiments, a time stamp and a timer are set, the timer starts to count time after data is sent to the candidate target base station, the second SN state information is sent to the candidate target base station after the time of the timer reaches the time stamp, and the timer is initialized.
According to another aspect of the present disclosure, there is also provided a base station, including: the first information sending unit is configured to send user data and first Serial Number (SN) state information to the candidate target base station after receiving handover request confirmation information fed back by the candidate target base station, wherein the first SN state information comprises SN state information of the data; a second information sending unit, configured to send second SN status information to the candidate target base station under the condition that the trigger condition is satisfied, where the second SN status information is configured to instruct the candidate target base station to discard the data that has been transmitted by the source base station and the terminal; and a third information sending unit configured to send third SN status information to the target base station after receiving a handover success message sent by a target base station that establishes a connection with the terminal among the candidate target base stations, the third SN status information including a first sequence number of data transmitted by the target base station and the terminal.
In some embodiments, the second information sending unit is configured to send the second SN status information to the candidate target base station after receiving the SN status update request sent by the candidate target base station.
In some embodiments, the second information transmitting unit is configured to transmit the second SN status information to the candidate target base station after transmitting the data to the candidate target base station for a predetermined time.
According to another aspect of the present disclosure, there is also provided a base station, including: a memory; and a processor coupled to the memory, the processor configured to perform the data transfer method as described above based on instructions stored in the memory.
According to another aspect of the present disclosure, there is also provided a data transmission system, including: the first base station is the base station; and the second base station is configured to receive user data and first SN state information and second SN state information sent by the first base station when the second base station serves as a candidate target base station, and is configured to receive third SN state information of the first base station when the second base station serves as a target base station established with the terminal in the candidate target base station, wherein the first SN state information comprises SN state information of the user data, the second SN state information is configured to indicate the candidate target base station to discard data transmitted by the first base station and the terminal, and the third SN state information comprises a first sequence number of the data transmitted by the target base station and the terminal.
According to another aspect of the present disclosure, a non-transitory computer-readable storage medium is also presented, having stored thereon computer program instructions, which when executed by a processor, implement the data transmission method as described above.
In the embodiment of the disclosure, the SN state information is added to indicate the candidate target base station to discard the data successfully transmitted by the source base station and the terminal, so that the cache load of the candidate target base station side is reduced, and the problem of packet loss caused by network overload is avoided.
Other features of the present disclosure and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description, serve to explain the principles of the disclosure.
The present disclosure may be more clearly understood from the following detailed description, taken with reference to the accompanying drawings, in which:
fig. 1 is a flow diagram of some embodiments of a data transmission method of the present disclosure.
Fig. 2 is a flow chart illustrating another embodiment of a data transmission method according to the present disclosure.
Fig. 3 is a schematic structural diagram of some embodiments of a base station of the present disclosure.
Fig. 4 is a schematic structural diagram of another embodiment of a base station according to the present disclosure.
Detailed Description
Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present disclosure unless specifically stated otherwise.
Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the disclosure, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
For the purpose of promoting a better understanding of the objects, aspects and advantages of the present disclosure, reference is made to the following detailed description taken in conjunction with the accompanying drawings.
Fig. 1 is a flow diagram of some embodiments of a data transmission method of the present disclosure. This embodiment is performed by a source base station.
In step 110, after receiving the handover request acknowledgement information fed back by the candidate target base station, user data and first sequence number SN status information are sent to the candidate target base station, where the first SN status information includes SN status information of the data.
In some embodiments, after receiving a Handover Request Acknowledge signaling of a candidate target base station, a source base station forwards user data to the candidate target base station, and sends first SN (Sequence Number) Status information, i.e., Early Status Transfer (Early Status Transfer) signaling, to the candidate target base station. The user data is data buffered by the source base station, the Early Status Transfer signaling comprises a serial number of the data, the candidate target base station stores information in the signaling and the data sent by the source base station after receiving the Early Status Transfer signaling, and the candidate target base station sends the data to the terminal according to the updated SN state indication after the terminal is successfully accessed to the target base station, so that the data between the base station and the terminal are delivered in sequence.
In step 120, second SN status information is sent to the candidate target base station when the trigger condition is satisfied, and the second SN status information is configured to instruct the candidate target base station to discard the data that has been successfully transmitted by the source base station and the terminal.
In some embodiments, after receiving the SN status update request sent by the candidate target base station, the source base station sends the second SN status information to the candidate target base station.
In some embodiments, the source base station receives the SN status update request sent by the candidate target base station through the X2/Xn interface.
For example, a new X2/Xn signaling is defined, and in the case that the network load of the candidate target base station is large, for example, by counting the self load capability, it is determined that the network load is large, then an SN Status Update Request signaling is sent to the source base station, requesting the source base station to Update the SN transition information. And after receiving the signaling, the source base station sends new SN state information to the candidate target base station, wherein the information element carried in the SN state information is the same as the information element in the Early Status Transfer signaling. And the candidate target base station discards the data packet which is successfully transmitted by the source base station and the terminal according to the received SN state information.
In some embodiments, the source base station sends the second SN status information to the candidate target base station a predetermined time after sending the data to the candidate target base station.
In some embodiments, the source base station sets a timestamp and a timer, the timer starts to count time after sending data to the candidate target base station, the second SN status information is sent to the candidate target base station after the time of the timer reaches the timestamp, and the timer is initialized.
For example, a timestamp T and a timer T are set on the source base station side, where T is not equal to 0 and T is initially 0. And starting timing from the time when the source base station transmits data to the candidate target base station, and when T is equal to T, the source base station transmits new SN state information to the candidate target base station. And the candidate target base station discards the data packet which is successfully transmitted by the source base station and the terminal according to the received SN state information. After the source bs sends the new SN status information, the timestamp T1(T1 is not equal to 0) and the initial timer T ═ 0 are updated, and the timing is restarted. The above steps are repeated thereafter. And canceling the configuration of the timestamp and the timer until the source base station receives a Handover Success signaling sent by the target base station.
In step 130, after receiving a handover success message sent by a target base station that establishes a connection with the terminal among the candidate target base stations, third SN status information is sent to the target base station, where the third SN status information includes a first sequence number of data transmitted by the target base station and the terminal.
In some embodiments, the terminal detects surrounding candidate target base stations, and when a certain candidate target base station meets the high threshold, the base station serves as the target base station, and the terminal is handed over from the source base station to the target base station. And in the process of executing the switching of the terminal, simultaneously maintaining the connection with the source base station. After the terminal is successfully connected to the target base station, the target base station sends a Handover Success signaling to the source base station, and the source base station can disconnect the terminal after receiving the signaling.
In the above embodiment, the SN status information is added to indicate that the candidate target base station discards data that has been successfully transmitted by the source base station and the terminal, so that the cache load on the candidate target base station side is reduced, and the problem of packet loss caused by network overload is avoided.
The method and the device are suitable for the scene that the network is subjected to conditional switching or the dual-activation protocol stack switching uses early data forwarding. The present disclosure is described below by taking a scenario in which early data forwarding is used under conditional switching as an example.
Fig. 2 is a flow chart illustrating another embodiment of a data transmission method according to the present disclosure. In this embodiment, two candidate target base stations are taken as an example.
In step 210, the source base station transmits a measurement control message to the terminal.
In step 220, the terminal transmits a measurement report to the source base station.
In step 230, the source base station decides to advance the handover.
In step 240, the source base station sends conditional handover requests to candidate target base station 1 and candidate target base station 2, respectively.
In step 250, the candidate target base station 1 and the candidate target base station 2 perform admission control.
In step 260, the candidate target base station 1 and the candidate target base station 2 respectively send conditional handover request responses to the source base station.
In step 270, the source base station sends the conditional switch configuration to the terminal.
In step 280, the source base station sends data and early sequence number translation signaling to candidate target base station 1 and candidate target base station 2, respectively.
In step 290, the candidate target base station 2 determines that the network resources are strained due to the load change during the process of waiting for the terminal to access.
In step 2100, the candidate target base station 2 sends a sequence number status update request signaling to the source base station to request the source base station to update the SN status information.
In step 2110, the source base station feeds back updated SN status information to the candidate target base station 1 and the candidate target base station 2, respectively.
In some embodiments, the source base station may feed back updated SN status information only to the candidate target base station that sent the serial number status update request signaling, or may feed back updated SN status information to all candidate target base stations.
In some embodiments, the condition that triggers the source base station to send updated SN status information may also specify a time for the source base station-side timer time to arrive at the timestamp.
In step 2120, candidate target base station 1 and candidate target base station 2 discard the data that the source base station has transmitted with the terminal according to the updated SN status information, respectively.
In step 2130, the terminal continues to perform radio signal measurements under conditional handover.
In step 2140, if the terminal uses the base station with the received signal quality greater than the threshold as the target base station, for example, candidate target base station 1, the terminal sends a synchronization and random access command to the target base station.
In step 2150, the target base station sends a handover success message to the source base station.
At step 2160, the source base station sends sequence number state transition signaling to the target base station.
In step 2170, the source base station disconnects from the terminal.
In the embodiment, the data transmission indication in the prior protocol aiming at the advanced data forwarding process is enhanced, the cache load of the candidate target base station or the target base station side can be effectively reduced, and the problem of packet loss caused by network overload is avoided.
Fig. 3 is a schematic structural diagram of some embodiments of a base station of the present disclosure. The base station includes a first information transmitting unit 310, a second information transmitting unit 320, and a third information transmitting unit 330, which may be implemented by the same information transceiving module.
The first information sending unit 310 is configured to send user data and first sequence number SN status information to the candidate target base station after receiving the handover request acknowledgement information fed back by the candidate target base station, where the first SN status information includes SN status information of the data.
In some embodiments, after receiving a Handover Request Acknowledge signaling of a candidate target base station, a source base station forwards user data to the candidate target base station, and sends first SN state information, that is, Early Status Transfer signaling, to the candidate target base station. The user data is data buffered by the source base station, the Early Status Transfer signaling comprises a serial number of the data, the candidate target base station stores information in the signaling and the data sent by the source base station after receiving the Early Status Transfer signaling, and the candidate target base station sends the data to the terminal according to the updated SN state indication after the terminal is successfully accessed to the target base station, so that the data between the base station and the terminal are delivered in sequence.
The second information sending unit 320 is configured to send second SN status information to the candidate target base station, where the second SN status information is configured to instruct the candidate target base station to discard data that has been transmitted by the source base station and the terminal, if the trigger condition is satisfied.
In some embodiments, after receiving the SN status update request sent by the candidate target base station, the source base station sends the second SN status information to the candidate target base station.
In some embodiments, the source base station receives the SN status update request sent by the candidate target base station through the X2/Xn interface.
For example, a new X2/Xn signaling is defined, and in case of a large network load of the candidate target base station, an SN Status Update Request signaling is sent to the source base station to Request the source base station to Update the SN transition information. And after receiving the signaling, the source base station sends new SN state information to the candidate target base station, wherein the information element carried in the SN state information is the same as the information element in the Early Status Transfer signaling. And the candidate target base station discards the data packet which is successfully transmitted by the source base station and the terminal according to the received SN state information.
In some embodiments, the source base station sends the second SN status information to the candidate target base station a predetermined time after sending the data to the candidate target base station.
In some embodiments, the source base station sets a timestamp and a timer, the timer starts to count time after sending data to the candidate target base station, the second SN status information is sent to the candidate target base station after the time of the timer reaches the timestamp, and the timer is initialized.
For example, a timestamp T and a timer T are set on the source base station side, where T is not equal to 0 and T is initially 0. And starting timing from the time when the source base station transmits data to the candidate target base station, and when T is equal to T, the source base station transmits new SN state information to the candidate target base station. And the candidate target base station discards the data packet which is successfully transmitted by the source base station and the terminal according to the received SN state information. After the source bs sends the new SN status information, the timestamp T1(T1 is not equal to 0) and the initial timer T ═ 0 are updated, and the timing is restarted. The above steps are repeated thereafter. And canceling the configuration of the timestamp and the timer until the source base station receives a Handover Success signaling sent by the target base station.
The third information sending unit 330 is configured to send third SN status information to the target base station after receiving a handover success message sent by a target base station that establishes a connection with the terminal among the candidate target base stations, where the third SN status information includes a first sequence number of data transmitted by the target base station and the terminal.
In some embodiments, the terminal detects surrounding candidate target base stations, and when a certain candidate target base station meets the high threshold, the base station serves as the target base station, and the terminal is handed over from the source base station to the target base station. And in the process of executing the switching of the terminal, simultaneously maintaining the connection with the source base station. After the terminal is successfully connected to the target base station, the target base station sends a Handover Success signaling to the source base station, and the source base station can disconnect the terminal after receiving the signaling.
In the above embodiment, the SN status information is added to indicate that the candidate target base station discards data that has been successfully transmitted by the source base station and the terminal, so that the cache load on the candidate target base station side is reduced, and the problem of packet loss caused by network overload is avoided.
Fig. 4 is a schematic structural diagram of another embodiment of a base station according to the present disclosure. The base station includes a memory 410 and a processor 420. Wherein: the memory 410 may be a magnetic disk, flash memory, or any other non-volatile storage medium. The memory 410 is used for storing instructions in the embodiments corresponding to fig. 1 and 2. Processor 420 is coupled to memory 410 and may be implemented as one or more integrated circuits, such as a microprocessor or microcontroller. The processor 420 is configured to execute instructions stored in memory.
In some embodiments, processor 420 is coupled to memory 410 by a BUS BUS 430. The base station 400 may also be coupled to an external storage system 450 via a storage interface 440 for facilitating retrieval of external data, and may also be coupled to a network or another computer system (not shown) via a network interface 460. And will not be described in detail herein.
In the embodiment, the buffer load of the candidate target base station side can be reduced, and the problem of packet loss caused by network overload is avoided.
In other embodiments of the present disclosure, a data transmission system is protected, where the data transmission system includes a first base station and a second base station, and the first base station is the base station in the above embodiments, i.e., a source base station. The second base station is a candidate target base station and a target base station which is connected with the terminal in the candidate target base station. The candidate target base station is configured to receive data transmitted by the first base station and the first and second sequence number, SN, status information. The target base station is configured to receive third SN state information of the first base station, wherein the first SN state information comprises SN state information of data, the second SN state information is configured to indicate that the candidate target base station discards the data transmitted by the source base station and the terminal, and the third SN state information comprises a first sequence number of the data transmitted by the target base station and the terminal.
And the candidate target base station discards the data transmitted between the source base station and the terminal according to the second SN state information, thereby reducing the cache load of the candidate target base station side and avoiding the packet loss problem caused by network overload.
In further embodiments, a computer-readable storage medium has stored thereon computer program instructions which, when executed by a processor, implement the steps of the method in the embodiments corresponding to fig. 1 and 2. As will be appreciated by one skilled in the art, embodiments of the present disclosure may be provided as a method, apparatus, or computer program product. Accordingly, the present disclosure may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present disclosure may take the form of a computer program product embodied on one or more computer-usable non-transitory storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present disclosure is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the disclosure. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
Thus far, the present disclosure has been described in detail. Some details that are well known in the art have not been described in order to avoid obscuring the concepts of the present disclosure. It will be fully apparent to those skilled in the art from the foregoing description how to practice the presently disclosed embodiments.
Although some specific embodiments of the present disclosure have been described in detail by way of example, it should be understood by those skilled in the art that the foregoing examples are for purposes of illustration only and are not intended to limit the scope of the present disclosure. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the present disclosure. The scope of the present disclosure is defined by the appended claims.
Claims (11)
1. A method of data transmission, comprising:
after receiving switching request confirmation information fed back by a candidate target base station, sending user data and first Serial Number (SN) state information to the candidate target base station, wherein the first SN state information comprises SN state information of the data;
sending second SN state information to the candidate target base station under the condition that a trigger condition is met, wherein the second SN state information is configured to indicate the candidate target base station to discard data transmitted by a source base station and a terminal;
and after receiving a handover success message sent by a target base station which establishes connection with the terminal in the candidate target base stations, sending third SN state information to the target base station, wherein the third SN state information comprises a first serial number of data transmitted by the target base station and the terminal.
2. The data transmission method according to claim 1, wherein sending second SN status information to the candidate target base station when a trigger condition is satisfied includes:
and after receiving an SN state updating request sent by the candidate target base station, sending second SN state information to the candidate target base station.
3. The data transmission method according to claim 1 or 2, wherein sending second SN status information to the candidate target base station when a trigger condition is satisfied comprises:
and sending second SN state information to the candidate target base station after sending data to the candidate target base station for a preset time.
4. The data transmission method according to claim 2,
and receiving an SN state updating request sent by the candidate target base station through an X2/Xn interface.
5. The data transmission method according to claim 3,
and setting a time stamp and a timer, starting timing by the timer after data is sent to the candidate target base station, sending second SN state information to the candidate target base station after the time of the timer reaches the time stamp, and initializing the timer.
6. A base station, comprising:
the first information sending unit is configured to send user data and first Serial Number (SN) state information to a candidate target base station after receiving handover request confirmation information fed back by the candidate target base station, wherein the first SN state information comprises SN state information of the data;
a second information sending unit, configured to send second SN status information to the candidate target base station under a trigger condition, where the second SN status information is configured to instruct the candidate target base station to discard data transmitted by a source base station and a terminal; and
and the third information sending unit is configured to send third SN state information to the target base station after receiving a handover success message sent by a target base station which establishes a connection with the terminal in the candidate target base stations, wherein the third SN state information comprises a first serial number of data transmitted by the target base station and the terminal.
7. The base station of claim 6, wherein,
the second information sending unit is configured to send second SN status information to the candidate target base station after receiving an SN status update request sent by the candidate target base station.
8. The base station of claim 6 or 7, wherein,
the second information transmitting unit is configured to transmit second SN status information to the candidate target base station after transmitting data to the candidate target base station for a predetermined time.
9. A base station, comprising:
a memory; and
a processor coupled to the memory, the processor configured to perform the data transfer method of any of claims 1 to 5 based on instructions stored in the memory.
10. A data transmission system comprising:
a first base station, the first base station being the base station of any one of claims 6 to 9; and
the second base station, when being a candidate target base station, is configured to receive user data and first SN status information and second SN status information sent by the first base station, and when being a target base station established with a terminal among the candidate target base stations, is configured to receive third SN status information of the first base station, where the first SN status information includes SN status information of the user data, the second SN status information is configured to instruct the candidate target base station to discard data already transmitted by the first base station and the terminal, and the third SN status information includes a first serial number of the data transmitted by the target base station and the terminal.
11. A non-transitory computer readable storage medium having stored thereon computer program instructions which, when executed by a processor, implement the data transmission method of any one of claims 1 to 5.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111556523A (en) * | 2019-02-12 | 2020-08-18 | 电信科学技术研究院有限公司 | Data transmission method and base station |
| US20200267604A1 (en) * | 2019-02-14 | 2020-08-20 | Samsung Electronics Co., Ltd. | Method and apparatus for resource management for conditional handover in wireless communication system |
-
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111556523A (en) * | 2019-02-12 | 2020-08-18 | 电信科学技术研究院有限公司 | Data transmission method and base station |
| US20200267604A1 (en) * | 2019-02-14 | 2020-08-20 | Samsung Electronics Co., Ltd. | Method and apparatus for resource management for conditional handover in wireless communication system |
Non-Patent Citations (4)
| Title |
|---|
| CHINA TELECOM: "R3-203534 "Discussion on early data forwarding for Conditional Handover"", 3GPP TSG_RAN\\WG3_IU, no. 3, 11 June 2020 (2020-06-11), pages 2 * |
| ERICSSON: "R3-197444 "(TP for LTE_feMob BL CR for TS 36.300): Early Data forwarding"", 3GPP TSG_RAN\\WG3_IU, no. 3, 22 November 2019 (2019-11-22), pages 2 * |
| ERICSSON: "R3-202373 "Optimizing multiple SN STATUS TRANSFER for disaggregated gNB"", 3GPP TSG_RAN\\WG3_IU, no. 3, 30 April 2020 (2020-04-30), pages 2 * |
| HUAWEI: "R3-203639 "(TP for NR_Mob_enh BL CR for TS 38.300): Data forwarding leftovers"", 3GPP TSG_RAN\\WG3_IU, no. 3, 11 June 2020 (2020-06-11), pages 6 * |
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