CN114342511A

CN114342511A - Communication method and communication device

Info

Publication number: CN114342511A
Application number: CN201980099946.9A
Authority: CN
Inventors: 许胜锋; 杨艳梅; 应江威; 李濛
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2022-04-12
Also published as: WO2021134561A1

Abstract

The application provides a communication method and a communication device. The communication method comprises the following steps: a first terminal acquires context information of a sidelink used for D2D communication between the first terminal and a second terminal; the first terminal sends the context information of the sidelink to the access network equipment, and the context information of the sidelink is used for the access network equipment to configure a sidelink resource pool for D2D communication, so that the access network equipment can configure the sidelink resource pool according to the context information of the sidelink, the configuration of the sidelink resource pool is more reasonable, QoS requirements of different services are met, and communication efficiency is improved.

Description

Communication method and communication device

Technical Field

The present application relates to the field of communications, and in particular, to a communication method and a communication apparatus.

Background

With the rapid development of mobile communication, the widespread use of new service types, such as video chat, virtual reality (VT)/Augmented Reality (AR), and other data services, increases the bandwidth demand of users. Device-to-Device (D2D) communication allows direct communication between User Equipments (UEs). Currently, D2D communication has been applied to 4G network systems.

The user equipment with the Uu port in idle state can perform D2D communication of different services based on the resources in the sidelink resource pool, in other words, D2D communication of different services can share the resources in the sidelink resource pool. However, because the quality of service (QoS) requirements of different services are different, the resources in the sidelink resource pool may not be able to meet the QoS requirements of different services.

Disclosure of Invention

The application provides a communication method and a communication device, which can more reasonably configure a sidelink resource pool so as to meet the QoS requirements of different services.

In a first aspect, a communication method is provided, including: a first terminal acquires context information of a sidelink used for D2D communication between the first terminal and a second terminal; and the first terminal sends the context information of the sidelink to an access network device, wherein the context information of the sidelink is used for the access network device to configure a sidelink resource pool for D2D communication. The method can realize that the access network equipment can more reasonably configure the side link resource pool, thereby meeting the QoS requirements of different services. The context information of the sidelink may be used to characterize resource requirements, e.g., slicing requirements or QoS requirements, of the D2D traffic carried or to be carried by the sidelink.

Optionally, the context information of the sidelink includes one or more of: slice information of the sidelink, and QoS requirement information of D2D traffic carried by the sidelink.

Optionally, the slice information comprises one or more of: a slice service type of the sidelink, and a slice identification of the sidelink.

In another possible implementation manner, before the first terminal sends the context information of the sidelink to the access network device, the method further includes: the first terminal sends a first request message to a Policy Control Function (PCF) and receives a first response message from the PCF; wherein the first request message is used for requesting the first terminal to be authorized for D2D communication, and the first response message is used for indicating that the first terminal is authorized for D2D communication; or, the first request message carries information of the D2D service carried by the sidelink, where the first request message is used to request that the first terminal is authorized to perform the D2D service carried by the sidelink, and the first response message is used to indicate that the first terminal is authorized to perform the D2D service carried by the sidelink. The PCF authorizes the first terminal to perform D2D communication or D2D service, so that the validity of the context information of the sidelink reported by the first terminal can be ensured, and the situation that the first terminal still reports the context information of the sidelink under the condition that the D2D communication or D2D service is not authorized is avoided, so that the access network device makes inaccurate statistics on the context information of the sidelink, and further the configuration of a sidelink resource pool is unreasonable.

In another possible implementation manner, before the first terminal sends the context information of the sidelink to the access network device, the method further includes: the first terminal sends a second request message to the PCF and receives a second response message from the PCF; the second request message carries context information of the sidelink, the second request message is used for requesting to authorize the first terminal to use the resource corresponding to the context information, and the second response message is used for indicating to authorize the first terminal to use the resource corresponding to the context information.

In another possible implementation manner, the sending, by the first terminal, the context information of the sidelink to the access network device includes: when a side link resource pool corresponding to the side link context information is congested, the first terminal sends the side link context information to the access network equipment; or,

and when the communication state of the side link meets a preset condition, the first terminal sends the context information of the side link to the access network equipment.

In another possible implementation manner, the method further includes: when the side link is interrupted or the side link is deactivated, the first terminal sends first indication information to the access network equipment or the PCF, wherein the first indication information is used for indicating the end of communication of the side link; or, when the first terminal is switched across the network access device, the first terminal sends second indication information to the access network device or the PCF, where the second indication information is used to indicate that the first terminal is switched across the network access device.

In a second aspect, a communication method is provided, including: the access network equipment receives the context information of a sidelink used for D2D communication between the first terminal and the second terminal; and the access network equipment configures a sidelink resource pool for D2D communication according to the context information of the sidelink. The method can realize that the access network equipment can more reasonably configure the side link resource pool, thereby meeting the QoS requirements of different services. The context information of the sidelink may be used to characterize resource requirements, e.g., slicing requirements or QoS requirements, of the D2D traffic carried or to be carried by the sidelink.

Optionally, the sidelink resource pool includes: a slice-based sidelink resource pool, a PQI-based sidelink resource pool, or a slice and PQI-based sidelink resource pool.

In another possible implementation manner, the method further includes: the access network equipment receives indication information from the first terminal, wherein the indication information is used for indicating the communication end of the sidelink, or the indication information is used for indicating the first terminal to switch across the access network equipment; and the access network equipment reconfigures the side link resource pool for D2D communication according to the indication information.

In another possible implementation manner, the receiving, by the access network device, the context information of the sidelink includes: the access network equipment receives the context information of the side link from the first terminal; or, the access network equipment receives the context information of the sidelink from the PCF.

In a third aspect, a communication method is provided, including: a policy control function PCF receives a first request message from a first terminal; the PCF sends a first response message to the first terminal according to the first request message; wherein the first request message is used for requesting the first terminal to be authorized for D2D communication, and the first response message is used for indicating that the first terminal is authorized for D2D communication; or, the first request message carries information of a D2D service, where the first request message is used to request the first terminal to be authorized to perform the D2D service, and the first response message is used to indicate that the first terminal is authorized to perform the D2D service. The PCF authorizes the first terminal to perform D2D communication or D2D service, so that the validity of the context information of the sidelink reported by the first terminal can be ensured, and the situation that the first terminal is not authorized to perform D2D communication or D2D service is avoided that the first terminal still reports the context information of the sidelink, so that the access network device does not count the context information of the sidelink accurately, thereby causing unreasonable configuration of a sidelink resource pool.

In a fourth aspect, a communication method is provided, including: a policy control function PCF receives a second request message from a first terminal, where the second request message carries context information of a sidelink, the sidelink is used for D2D communication between the first terminal and a second terminal, and the second request message is used for requesting authorization of the first terminal to use a resource corresponding to the context information; and the PCF sends a second response message to the first terminal according to the second request message, wherein the second response message is used for indicating that the first terminal is authorized to use the resources corresponding to the context information. The PCF authorizes the first terminal to use the resource corresponding to the context information, so that the validity of the context information of the sidelink reported by the first terminal can be ensured, and the situation that the access network equipment still counts the context information under the condition that the first terminal is not authorized to use the resource corresponding to the context information, and further the resource pool configuration of the sidelink is unreasonable is avoided.

In one possible implementation, the context information of the sidelink includes one or more of: slice information of the sidelink, and QoS requirement information of D2D traffic carried by the sidelink.

In another possible implementation manner, the method further includes: and the PCF sends the context information of the side link to the access network equipment of the first terminal.

In another possible implementation manner, the method further includes: the PCF receives first indication information, wherein the first indication information is used for indicating the end of the communication of the sidelink; and the PCF carries out charging statistics on the first terminal according to the first indication information, and/or the PCF sends the first indication information to access network equipment of the first terminal.

In another possible implementation manner, the method further includes: the PCF receives second indication information, wherein the second indication information is used for indicating the first terminal to switch across the network access equipment; and the PCF sends the second indication information to the access network equipment before the first terminal is switched to the cross-access network equipment.

In a fifth aspect, a communication device is provided, which includes a processing module and a transceiver module, and the processing module can receive or transmit a message through the transceiver module. The processing module may be configured to perform the method of any of the above aspects and implementations.

In a possible implementation manner, the communication device may be the first terminal in the first aspect, or may also be a chip or a system on chip in the first terminal. The communication device may comprise corresponding modules, units or means (means) for implementing the method of the first aspect described above, which may be implemented by hardware, software or by hardware executing corresponding software. The hardware or software includes one or more modules or units corresponding to the above functions.

In another possible implementation manner, the communication device may be the access network device in the second aspect, or a chip or a system on chip in the access network device. The communication device may comprise corresponding modules, units or means (means) for implementing the method of the second aspect described above, which may be implemented by hardware, software or by hardware executing corresponding software. The hardware or software includes one or more modules or units corresponding to the above functions.

In another possible implementation, the communication device may be the PCF in the third or fourth aspect, or a chip or system-on-chip within the PCF. The communication device may comprise modules, units or means (means) corresponding to the method of the third or fourth aspect, which may be implemented by hardware, software or by hardware executing corresponding software. The hardware or software includes one or more modules or units corresponding to the above functions.

In a sixth aspect, a communication apparatus is provided, including: a processor, which may also include a memory; the memory is configured to store computer instructions that, when executed by the processor, cause the communication device to perform the method of any of the above aspects. The communication device may be the first terminal, or a device in the first terminal, such as a system chip; alternatively, the communication device may be the access network device, or a device in the access network device, such as a system chip; alternatively, the communication device may be a PCF of any of the above aspects, or a device, such as a system chip, within a PCF of any of the above aspects.

In an eighth aspect, there is provided a computer program product comprising: computer instructions (also may be referred to as code, or instructions) that when executed, cause a method in any of the possible implementations of any of the aspects described above to be performed.

In a ninth aspect, a computer-readable storage medium is provided, which stores computer instructions (which may also be referred to as code, or instructions) that, when executed on a computer or processor, cause the computer or processor to perform the method of any one of the possible implementations of any one of the above aspects.

In a thirteenth aspect, a communication system is provided, where the communication system includes the access network device in the second aspect, and may further include the PCF in the third or fourth aspect, and may further include the first terminal in the first aspect.

Drawings

Fig. 1 is an architectural diagram of a D2D communication system;

FIG. 2 is a schematic diagram of an architecture of a 5G communication system;

FIG. 3 is a schematic flow chart diagram of a method of communication in an embodiment of the present application;

FIG. 4 is a schematic flow chart diagram of another method of communication in an embodiment of the present application;

fig. 5 is a schematic configuration diagram of a communication apparatus according to an embodiment of the present application;

fig. 6 is a schematic configuration diagram of another communication apparatus according to an embodiment of the present application.

Detailed Description

The technical solution in the present application will be described below with reference to the accompanying drawings.

Fig. 1 shows an architectural diagram of a D2D communication system. As shown in fig. 1, the D2D communication system includes: UE1, UE2, and a Radio Access Network (RAN) device. The UE1 and the UE2 may communicate with each other through a communication link of the PC5 port, which may be referred to as PC5 port communication. The UE1 and the UE2 may communicate with the RAN via a Uu port communication link, which may be referred to as Uu port communication.

Where, port PC5 refers to the interface between two UEs, and port Uu refers to the interface between a UE and a RAN. The Communication link of the PC5 port may also be referred to as a sidelink or a D2D Communication link, and is used for information transmission of a data plane and a control plane, and carries messages such as Direct Discovery (Direct Discovery) and Direct Communication (Direct Communication).

The PC5 interface communication may use multiple air interface technologies, such as a fifth generation (5G) technology or a Long Term Evolution (LTE) technology.

UE: can be a terminal, access terminal, subscriber unit, subscriber station, mobile, remote station, remote terminal, mobile device, user terminal, wireless communication device, user agent, or user equipment. The terminal may also be, without limitation, a cellular telephone, a cordless telephone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device having wireless communication capability, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device, or the like.

RAN equipment: the access network device may also be referred to as an access network device, and is mainly responsible for functions of radio resource management, quality of service management, data compression, encryption and the like on the air interface side. The access network equipment may include various forms of base stations, such as: macro base stations, micro base stations, relay stations, access points, etc. In systems using different radio access technologies, names of devices having base station functions may be different, for example, a gbb in a 5G system, an evolved NodeB (eNB or eNodeB) in an LTE system, and a radio controller in a Cloud Radio Access Network (CRAN) scenario. In addition, the access network device may also be an access network device in a relay station, an access point, a vehicle-mounted device, a wearable device, and a future 5G network or an access network device in a Public Land Mobile Network (PLMN) for future evolution, which is not limited.

It should be noted that the D2D communication architecture shown in fig. 1 may be based on a 5G communication system, an LTE communication system, or a future communication system, without limitation.

Fig. 2 shows an architecture diagram of a 5G communication system. As shown in fig. 2, the communication system includes: a terminal 201, a RAN device 202, a User Plane Function (UPF) 203, a Data Network (DN) 204, an authentication server function (AUSF) 205, an AMF206, a Session Management Function (SMF) 207, a network open function (NEF) 208, a network function library function (NRF) 209, a Policy Control Function (PCF) 210, a Unified Data Management (UDM) 211, and an NSSF 212.

The terminal 201 accesses the network and obtains services mainly through a wireless air interface, interacts with the RAN device 202 through the air interface, and interacts with the AMF206 of the core network through non-access stratum signaling (NAS).

RAN202 is mainly responsible for air interface resource scheduling and air interface connection management of terminal 201 accessing to the network. E.g., a gNB in a 5G system.

The UPF203 is mainly responsible for forwarding and receiving user data in the terminal. For example, the UPF may receive user data from the data network and transmit the user data to the terminal through the access network device, and may also receive user data from the terminal through the access network device and forward the user data to the data network. The transmission resources and scheduling functions in UPF103 that serve the terminals are managed and controlled by SMF 207.

The AUSF205 is mainly responsible for authentication and authorization of the user to ensure that the user is a legal user.

The AMF206 is mainly responsible for signaling processing parts, such as: access control, mobility management, attach and detach, and gateway selection, and the AMF206 may also provide storage resources of a control plane for a session in a terminal when the session is served, so as to store a session identifier, an SMF identifier associated with the session identifier, and the like.

SMF207, which is responsible for user plane network element selection, user plane network element redirection, Internet Protocol (IP) address allocation, bearer establishment, modification, and release, and quality of service (QoS) control.

NEF208, responsible for the open-out of mobile network capabilities.

NRF209 for dynamic registration of service capabilities responsible for network functions and network function discovery.

The PCF210 is configured to provide policy rules to a control layer network function, and is also responsible for acquiring user subscription information related to policy decision.

And the UDM211 is used for unified data management, and supports functions of 3GPP authentication, user identity operation, authority granting, registration, mobility management and the like.

And the NSSF212 is used for completing the network slice selection function of the terminal.

And the UDR213 is responsible for storing and providing the terminal subscription data or storing and providing the terminal strategy data.

In the network architecture, Nausf is a service-based interface presented by AUSF205, Namf is a service-based interface presented by AMF206, Nsmf is a service-based interface presented by SMF207, Nnef is a service-based interface presented by NEF208, nrrf is a service-based interface presented by NRF209, Npcf is a service-based interface presented by PCF210, Nudm is a service-based interface presented by UDM211, NSSF is a service-based interface presented by NSSF212, and Nudr is a service-based interface presented by UDR 213. N1 is a reference point between the UE201 and the AMF206, and N2 is a reference point between the RAN device 202 and the AMF206, which is used for sending NAS messages, etc.; n3 is a reference point between the RAN202 and the UPF203 for transmitting user plane data and the like; n4 is a reference point between SMF207 and UPF203, and is used to transmit information such as tunnel identification information, data cache indication information, and downlink data notification message of N3 connection; the N6 interface is a reference point between the UPF203 and the DN204 for transmitting user plane data and the like.

The following is a description of terms involved in the present application.

Slicing, which refers to splitting a physical network of an operator into a plurality of logical networks to realize one-network multi-use. Slicing enables an operator to construct a plurality of dedicated, virtual, isolated, and on-demand customized logical networks on a physical network, and further, different requirements (such as time delay, bandwidth, connection number, and the like) of different industry customers on network capacity can be met.

The QoS requirement of the service is used for representing the QoS requirement of the service. The QoS requirements may include QoS requirement parameters such as packet delay budget (packet delay budget), packet error rate (packet error rate), and maximum data burst size (maximum data burst volume). For example, assume that the values of each QoS requirement parameter in the QoS requirements of vehicle-to-vehicle (V2V) service are as follows: the packet delay budget is 200ms, and the packet error rate is 2%, which indicates that the delay of the data packet required by the V2V service is lower than 200ms, and the packet error rate is not higher than 2%.

It should be noted that, in the following embodiments of the present application, names of messages between devices or names of parameters in messages are only an example, and other names may also be used in a specific implementation, which is not specifically limited in this embodiment of the present application. In addition, the embodiments may refer to the same or similar steps, terms, etc. without limitation.

Fig. 3 shows a schematic flow chart of a communication method of the present application, as described below.

301. The first terminal obtains context information of a sidelink.

Wherein the sidelink may be used for D2D communication between the first terminal and the second terminal. The sidelink may also be referred to as a D2D communication link, and may also be referred to as a PC5 communication link, without limitation. The PC5 communication link may refer to a communication link based on the PC5 port.

The context information of the sidelink can be used to characterize resource requirements, such as slice requirements or QoS requirements, of the D2D traffic carried or to be carried by the sidelink. In particular, the context information of the sidelink may include one or more of: slice information of the sidelink, and QoS requirement information of D2D traffic carried by the sidelink.

Wherein the slice information of the sidelink can be used to identify the slice of the sidelink. The slice of the sidelink may refer to a slice to which the sidelink belongs, that is, a slice to which resources (e.g., frequency domain resources, time domain resources) occupied by the sidelink belong. For example, the frequency occupied by the sidelink belongs to the frequency pre-divided into V2V slices, and the slice to which the sidelink belongs is the V2V slice.

Specifically, the slice information of the sidelink may include one or more of: a slice service type for the sidelink, and a slice identification for the sidelink.

The slicing service type may be V2V slicing, Unmanned Aerial Vehicle (UAV) to UAV (U2U) slicing, or slicing for communication between mobile phones, etc. The V2V slice may be used for V2V communications and the U2U slice may be used for communications between drones. It should be noted that if only one V2V slice exists within a PLMN, the slicing service type may also be used to identify the slice.

Wherein the slice identifier may be used to identify the slice, e.g., the name of the slice, the number of the slice, etc. Specifically, the slice identification may be slice selection assistance information (slice selection assistance information).

The D2D traffic carried by the sidelink may refer to D2D traffic carried on the sidelink, that is, D2D traffic carried by the sidelink, for example, V2V traffic and U2U traffic.

Further, the QoS requirement information of the D2D traffic carried by the sidelink may be a QoS requirement parameter in the QoS requirement of the D2D traffic carried by the sidelink; alternatively, the QoS requirement information of the D2D service carried by the sidelink may be indication information of the QoS requirement of the D2D service carried by the sidelink, such as a PC 55G quality of service identifier (PC 55G QoS identifier, PQI).

Specifically, the first terminal may determine the QoS requirement information according to a D2D service type, and the D2D service type may be V2V service or U2U service. For example, there is a corresponding relationship between the D2D service type and the QoS requirement information, and the corresponding relationship may be preconfigured in the first terminal, or obtained from the network side when the first terminal performs registration, which is not limited.

302. The first terminal sends the context information of the side link to the access network equipment.

Wherein the context information of the sidelink is used for the access network device to configure the sidelink resource pool for the D2D communication. Specifically, the first terminal may send the context information of the sidelink to the access network device through a core network device (e.g., an AMF, a PCF, etc.), for example, the first terminal sends the context information of the sidelink to the AMF through an NAS message, then an AMF network element sends the context information of the sidelink to the PCF, and after the PCF authorizes the first terminal (for details, see the relevant description of subsequent PCF authorization), the PCF may send the context information of the sidelink to the access network device through the AMF, or the AMF may send the context information of the sidelink to the access network device after knowing that the first terminal is authorized. Obviously, the first terminal may also directly send the context information of the sidelink to the access network device through a Radio Resource Control (RRC) message, without limitation.

Accordingly, the access network device receives context information for the sidelink. For example, the access network device receives context information for the sidelink directly from the first terminal; alternatively, the access network equipment receives the context information of the sidelink from the PCF or AMF.

In addition, in step 302, the first terminal may periodically send the context information of the sidelink, or may send the context information of the sidelink in an event-triggered manner (for details, see the related descriptions of steps 302a-302 b), without limitation.

It should be noted that, if the Uu port of the first terminal is in the idle state, the first terminal may perform step 302 after the Uu port between the first terminal and the access network device changes to the connected state; alternatively, if the Uu port of the first terminal is in the connected state, the first terminal may directly perform step 302.

303. And the access network equipment configures the side link resource pool for D2D communication according to the context information of the side link.

The sidelink resource pool for D2D communication may be referred to as a sidelink resource pool for short, or a sidelink physical resource pool. The sidelink resource pool may refer to a set of time domain resources and/or frequency domain resources used for D2D communication, i.e., resources in the sidelink resource pool may be used for D2D communication.

Wherein the time domain resource of the sidelink resource pool may be a time range, which may be represented by a time period (e.g., 8:00-12:00) or a time length (e.g., 4 hours, or 40 minutes, etc.). The frequency domain resources of the sidelink resource pool may be a frequency range, e.g., 110-128 MHz.

Illustratively, assuming that the sidelink resource pool is characterized by { time horizon, frequency horizon } - {8:00-12:00, 110-.

It should be noted that the resources in the sidelink resource pool may be used for D2D communication between terminals in idle state at Uu port, and may also be used for D2D communication between terminals in connected state at Uu port.

Specifically, the sidelink resource pool may include: a slice-based sidelink resource pool, a PQI-based sidelink resource pool, or a slice and PQI-based sidelink resource pool.

The slice-based sidelink resource pool may be a sidelink resource pool configured at a slice granularity, and different sidelink resource pools may be configured for different slices. In other words, there is a corresponding relationship between the slice information and the sidelink resource pool, and the sidelink resource pool corresponding to the slice identified by the slice information can be indexed or searched through the slice information.

For example, for a V2V slice, a sidelink resource pool of the V2V slice is configured (which may be denoted as sidelink resource pool X); for the U2U slice, a sidelink resource pool of the U2U slice (which may be denoted as sidelink resource pool Y) is configured. For another example, for slice 1, configure the sidelink resource pool (which may be denoted as sidelink resource pool m) of slice 1; for slice 2, configure the sidelink resource pool (which may be denoted as sidelink resource pool n) of slice 2

Further, assuming that the number of sidelink for the V2V slice (i.e., the number of sidelink whose occupied resources belong to the V2V slice) is greater than the number of sidelink for the U2U slice (i.e., the number of sidelink whose occupied resources belong to the U2U slice), the number of resources (e.g., frequency range, or time length) in the sidelink resource pool X allocated to the V2V slice is greater than the number of resources in the sidelink resource pool Y allocated to the U2U slice, i.e., the sidelink resource pool for the V2V slice is greater than the number of resources in the sidelink resource pool for the U2U slice. Alternatively, assuming that the sidelink of the V2V slice has good communication performance on one frequency (denoted as a first frequency) and the sidelink of the U2U slice has good communication performance on another frequency (denoted as a second frequency), the first frequency may be included in the sidelink resource pool of the V2V slice and the second frequency may be included in the sidelink resource pool of the U2U slice.

The QoS requirement-based sidelink resource pool may refer to a sidelink resource pool configured with QoS requirements as granularity, and different sidelink resource pools may be configured for different QoS requirements. In other words, the QoS requirement information corresponds to the sidelink resource pool, and the sidelink resource pool corresponding to the QoS requirement information can be indexed or searched through the QoS requirement information (e.g., PQI).

For example, assuming that the QoS requirement information is PQI, for a QoS requirement with PQI equal to 1, a sidelink resource pool with PQI equal to 1 is configured (which may be referred to as sidelink resource pool a); for QoS requirement of PQI ═ 2, a sidelink resource pool of PQI ═ 2 (which may be denoted as sidelink resource pool b) is configured.

Further, assuming that the number of sidelink with PQI equal to 1 is greater than the number of sidelink with PQI equal to 2, the sidelink resource pool a configured with PQI equal to 1 may be greater than the sidelink resource pool b configured with PQI equal to 2, that is, the number of resources in the sidelink resource pool a with PQI equal to 1 is greater than the number of resources in the sidelink resource pool b with PQI equal to 2. Alternatively, assuming that the priority corresponding to PQI ═ 1 is higher than the priority corresponding to PQI ═ 2, the sidelink resource pool a configured to PQI ═ 1 may be larger than the sidelink resource pool b configured to PQI ═ 2.

The size of the resource amount of the sidelink resource pool can be compared based on the frequency range and the time range of the sidelink resource pool, for example, the sidelink resource pool a includes all the time domain resources with the frequency of 110-128MHz, the sidelink resource pool b includes all the time domain resources with the frequency of 128-140MHz, and then the resource amount of the sidelink resource pool a is greater than that of the sidelink resource pool b (which may be referred to as the sidelink resource pool a being greater than the sidelink resource pool b for short); the comparison may also be based only on the frequency range or time range of the sidelink resource pool, for example, the sidelink resource pool a includes time domain resources of 8:00-12:00, and the sidelink resource pool b includes time domain resources of 14: 00-16: 00, the number of resources in the sidelink resource pool a is greater than that in the sidelink resource pool b, without limitation.

It should be noted that the resources in the sidelink resource pool with PQI ═ 1 may be used to carry D2D traffic with PQI ═ 1.

The sidelink with PQI ═ 1 may refer to the sidelink used for carrying D2D traffic with PQI ═ 1. In addition, the sidelink with PQI ═ 2, 3, 4, …, etc. has similar meaning to the sidelink with PQI ═ 1, and thus, the description thereof is omitted.

Here, the D2D traffic having PQI ═ 1 may refer to D2D traffic having a QoS requirement indicated by PQI ═ 1. In addition, the D2D service of PQI ═ 2, 3, 4, …, etc. has a similar meaning to the D2D service of PQI ═ 1, and thus, detailed description thereof is omitted.

The sidelink resource pool based on the slice and the QoS requirement may refer to a sidelink resource pool configured with the slice and the QoS requirement as granularity, and different sidelink resource pools may be configured for different QoS requirements on different slices. In other words, the slice information and the QoS requirement information correspond to the sidelink resource pool, and the sidelink resource pool corresponding to the QoS requirement information on the slice identified by the slice information can be indexed or searched by the slice information (e.g., the slice type) and the QoS requirement information (e.g., the PQI).

For example, for QoS requirements of V2V slice and PQI ═ 1, sidelink resource pool 1 is configured; for QoS requirements of V2V slice and PQI ═ 2, sidelink resource pool 2 is configured; for a QoS requirement of U2U slice and PQI ═ 2, sidelink resource pool 3 is configured, and so on. It can be seen that sidelink resource pools 1, 2, and 3 can each be indexed or looked up by slice information and PQI.

It should be noted that the access network device may perform step 303 each time the access network device receives context information of the sidelink, or may perform step 303 when a preset condition is met. For example, the access network device executes step 303 in a preset period, or the access network device executes step 303 when the received context information of the sidelink reaches a preset number, which is not limited.

It can be seen that, by using the method provided in the foregoing embodiment, the terminal sends context information of the sidelink to the access network device, and then the access network device configures a sidelink resource pool used for D2D communication according to the context information of the sidelink, so that the access network device can dynamically configure the sidelink resource pool used for D2D communication according to resource requirements of the sidelink, thereby avoiding unreasonable configuration of the sidelink resource pool, for example, congestion occurs when the sidelink resource pool is configured too small, or resource waste and the like are caused by too large configuration of the sidelink resource pool, and further improving resource utilization rate.

Optionally, in an implementation scenario of the foregoing embodiment, before step 302, the method further includes:

300a, the first terminal sends a first request message to the PCF and receives a first response message from the PCF.

In an alternative implementation, the first request message is used to request that the first terminal is authorized to perform D2D communication, and the first response message is used to indicate that the first terminal is authorized to perform D2D communication.

In another alternative implementation, the first request message carries information of the D2D service carried by the sidelink. The information of the D2D service may be a service type of the D2D service, for example, V2V service, or U2U service. Accordingly, the first request message is used to request that the first terminal is authorized to perform D2D service carried by the sidelink, and the first response message is used to indicate that the first terminal is authorized to perform D2D service carried by the sidelink.

Correspondingly, the PCF receives the first request message and sends a first response message to the first terminal according to the first request message.

Illustratively, the PCF may obtain subscription information for the first terminal from the UDM after receiving the first request message. When the subscription information shows that the first terminal has subscribed to D2D communication, the PCF may authorize the D2D communication of the first terminal; or, when the subscription information shows that the first terminal has subscribed to the V2V service, the PCF authorizes the first terminal to perform the V2V service.

It should be noted that the authorization mentioned in the present application can be replaced by permission, and is not limited.

In the implementation scenario, the PCF authorizes the D2D service or the D2D communication of the first terminal, and the first terminal reports the context information of the sidelink to the access network device after authorization, so that the validity of the context information of the sidelink received by the access network device is ensured, inaccurate statistics caused by invalid context information of the sidelink by the access network device is avoided, and the access network device can configure the sidelink resource pool more accurately.

Optionally, in another implementation scenario of the foregoing embodiment, before step 302, the method further includes:

300b, the first terminal sends a second request message to the PCF and receives a second response message from the PCF;

the second request message carries context information of the sidelink, the second request message is used for requesting to authorize the context information of the sidelink, and the second response message is used for indicating to authorize the context information of the sidelink.

The context information authorizing the sidelink may refer to authorizing the first terminal to use a resource in a sidelink resource pool corresponding to the context information. For example, assuming that the context information is slice information, the resource in the sidelink resource pool corresponding to the context information refers to a resource in the sidelink resource pool of the slice identified by the slice information. For another example, assuming that the context information is QoS requirement information of the D2D service carried by the sidelink, and the QoS requirement information is PQI ═ 1, then the resource corresponding to the context information refers to a resource in the sidelink resource pool with PQI ═ 1.

Correspondingly, the PCF receives the second request message and sends a second response message to the first terminal according to the second request message.

In one example, the PCF receives a second request message, where the second request message carries slice information of the sidelink, acquires subscription information of the first terminal from the UDM, and if the subscription information shows that the first terminal has signed a slice identified by the slice information of the sidelink, that is, the slice signed the sidelink, the PCF sends a second response message to the first terminal.

In another example, the PCF receives a second request message, where the second request message carries QoS requirement information of the D2D service carried by the sidelink, acquires subscription information of the first terminal from the UDM, and if the QoS parameter in the subscription information includes a QoS requirement parameter corresponding to the QoS requirement information of the D2D service carried by the sidelink, the PCF sends a second response message to the first terminal.

In the implementation scenario, the PCF authorizes the first terminal to use the resource in the sidelink resource pool corresponding to the context information, and the first terminal reports the context information of the sidelink to the access network device after authorization, which ensures the validity of the context information of the sidelink received by the access network device, and avoids inaccurate statistics of the access network device due to the invalidity of the context information of the sidelink, thereby enabling the access network device to configure the sidelink resource pool more accurately.

Optionally, in another implementation scenario of the foregoing embodiment, step 302 includes or replaces step 302a or 302 b.

302a, when the side link resource pool corresponding to the side link context information is congested, the first terminal sends the side link context information to the access network device.

The occurrence of congestion in the sidelink resource pool may refer to that available sidelink resources in the sidelink resource pool are less than or equal to a first threshold, or that resource preemption in the sidelink resource pool is severe, for example, the first terminal detects that a proportion of used resources in the sidelink resource pool is greater than a preset threshold through a detection mechanism of Carrier Sense Multiple Access with connectivity Access (CSMA/CA). In particular, the used resources may refer to resources that have data transmission.

The first threshold may be a positive integer or 0. For example, when the available sidelink resources in the sidelink resources pool are equal to 0, indicating that there are no available sidelink resources in the sidelink resources pool, the sidelink resources pool is congested.

Wherein the available sidelink resources may refer to unused sidelink resources.

In one example, when the context information of the sidelink is slice information, the sidelink resource pool corresponding to the context information of the sidelink is the sidelink resource pool of the slice identified by the slice information. Reference may be made specifically to the foregoing description of the slice-based sidelink resource pool. E.g., a sidelink resource pool of V2V slices.

Accordingly, the first terminal may determine that the sidelink resource pool of the sidelink slice is congested by determining whether an available sidelink resource in the sidelink resource pool of the sidelink slice is less than or equal to a first threshold; alternatively, the first terminal may receive congestion indication information from the access network device, where the congestion indication information may be used to indicate that the sidelink resource pool of the sidelink slice is congested, without limitation.

The available sidelink resources in the sidelink resource pool can be sent to the first terminal by the access network device without limitation.

In another example, when the context information of the sidelink is QoS requirement information of D2D service carried by the sidelink, the sidelink resource pool corresponding to the context information of the sidelink is a sidelink resource pool corresponding to the QoS requirement information.

The sidelink resource pool corresponding to the QoS requirement information may refer to a sidelink resource pool indexed or searched by the QoS requirement information, and refer to the foregoing description of the sidelink resource pool based on the QoS requirement. For example, the QoS requirement information is PQI ═ 2, and the sidelink resource pool corresponding to the QoS requirement information is sidelink resource pool b.

Correspondingly, the first terminal may receive congestion indication information from the access network device, where the congestion indication information is used to indicate that a side link resource pool corresponding to QoS requirement information of the D2D service carried by the side link is congested; alternatively, the first terminal may determine whether the sidelink resource pool corresponding to the QoS requirement information is congested by determining whether an available sidelink resource in the sidelink resource pool corresponding to the QoS requirement information is less than or equal to a first threshold.

In another example, when the context information of the sidelink includes slice information and QoS requirement information of D2D service carried by the sidelink, the sidelink resource pool corresponding to the context information of the sidelink is the sidelink resource pool corresponding to the QoS requirement information on the slice identified by the slice information.

The sidelink resource pool corresponding to the QoS requirement information on the slice identified by the slice information may refer to a sidelink resource pool indexed or searched by the slice information and the QoS requirement information, and specifically refer to the above description of the sidelink resource pool based on the slice and the QoS requirement. For example, if the slice information is a V2V slice and the QoS requirement information is PQI equal to 1, the sidelink resource pool corresponding to the QoS requirement information on the slice identified by the slice information is a sidelink resource pool with PQI equal to 1 on the V2V slice, that is, a sidelink resource pool 1 configured for the V2V slice and PQI equal to 1.

302b, when the communication state of the sidelink meets the preset condition, the first terminal sends the context information of the sidelink to the access network equipment.

Wherein the communication state of the sidelink can be used for characterizing the communication quality of the sidelink. Specifically, the communication status may include parameters characterizing the communication quality, such as signal interference of the sidelink, signal strength or quality of the sidelink, and QoS achievement (QoS interference) of the sidelink.

The QoS implementation of the sidelink may include: QoS implementation such as packet delay of the sidelink and packet error rate (packet error rate) of the sidelink.

Accordingly, the condition that the communication status of the sidelink meets the preset condition can be used to characterize that the communication quality of the sidelink is poor, or the communication quality of the sidelink does not meet the requirement of normal communication (or D2D communication, or service, etc.), without limitation.

Illustratively, the condition that the communication status of the sidelink satisfies the preset condition may be classified into the following cases according to the different communication statuses:

in case 1, when the communication status is a QoS implementation of a sidelink, the communication status of the sidelink meets a preset condition that the QoS implementation of the sidelink does not meet the QoS requirement of the D2D service carried by the sidelink.

The QoS implementation may be sent to the first terminal by the application server, without limitation.

It should be noted that, when the QoS parameter of the sidelink includes multiple parameters, that the QoS implementation of the sidelink does not satisfy the QoS requirement of the D2D service carried by the sidelink may mean that any parameter in the QoS implementation of the sidelink does not satisfy the QoS requirement.

In case 2, when the communication status is the signal strength of the sidelink, the communication status of the sidelink meets the preset condition that the signal strength of the sidelink is smaller than the preset strength threshold.

In case 3, when the communication status is the signal quality of the sidelink, the communication status of the sidelink satisfies the preset condition that the signal quality of the sidelink is less than the preset quality threshold.

In case 4, when the communication status is the signal interference of the sidelink, the communication status of the sidelink meets the preset condition that the signal interference of the sidelink is greater than the preset interference threshold.

It should be noted that the present application is not limited to the above-mentioned cases, and may also include various combinations between the above-mentioned cases, for example, a combination of cases 2 and 3, that is, the communication state includes the signal strength and the signal quality of the sidelink, and the communication state of the sidelink satisfies the preset condition including: the signal intensity of the side link is smaller than a preset intensity threshold; and/or the signal quality of the sidelink is less than a preset quality threshold.

Optionally, in another implementation scenario of the foregoing embodiment, the method further includes:

when the side link is interrupted or deactivated, the first terminal sends first indication information to the access network equipment or the PCF.

The first indication information may be used to indicate that communication of the sidelink is ended, or D2D service carried by the sidelink is ended, or data transmission is stopped on the sidelink, without limitation.

Specifically, the occurrence of the sidelink interruption may refer to that the first terminal does not receive or transmit data or signaling through the sidelink for a preset time period. For example, the first terminal does not receive a PC5 signaling (PC 5-signaling) message over the sidelink within 1 second.

It should be noted that, during the D2D communication process, the uplink may be maintained by using a keep-alive function, and specifically, the link may be maintained by periodically sending PC5-S messages.

In particular, deactivating the sidelink may refer to releasing the sidelink, which may be understood as releasing context information of the sidelink in particular. For example, the first terminal sends a deactivation command to the second terminal, and the deactivation command is used to deactivate the sidelink. For another example, the first terminal receives a deactivation command from the second terminal, and the deactivation command is used to deactivate the sidelink.

Further, the method may further include: the access network device receives the first indication information and reconfigures the sidelink resource pool for D2D communication according to the first indication information.

The reconfiguration may also be referred to as updating, without limitation.

In one example, assuming that the context information of the sidelink is slice information and the slice information is an identifier of a V2V slice, the access network device updates the statistical information of the sidelink in the V2V slice after receiving the first indication information. For example, before the first indication information is received, the number of uplinks on the V2V slice is 10; after receiving the first indication information, the number of uplinks on the V2V slice is updated, and the updated number is 9. Further, the access network device reconfigures the sidelink resource pool for D2D communication according to the updated number of sidelink. For example, the access network device adjusts the sidelink resource pool of each slice by combining the number of sidelinks in the U2U slice and the updated number of sidelinks in the V2V slice, which may specifically refer to the implementation manner of subsequent step 303 and is not described herein again.

and when the first terminal is switched across the access network equipment, the first terminal sends second indication information to the access network equipment or the PCF.

The second indication information may be used to indicate that the first terminal is handed over to the access network device, or the first terminal is handed over to another access network device, which is not limited.

Specifically, when the first terminal performs handover across the network access device, the first terminal may send the second indication information to the access network device before the handover of the network access device occurs to the first terminal. For example, the first terminal receives a handover command, and the handover command is used to instruct the first terminal to handover to the target access network device, at this time, the first terminal sends the second instruction information to the source access network device or PCF of the first terminal. In other words, the first terminal, upon receiving the handover command instructing handover to the target access network device, indicates that handover across the access network devices occurs at the first terminal.

Further, the method may further include: the access network device receives the second indication information and reconfigures the sidelink resource pool for the D2D communication according to the second indication information.

The reconfiguration may also be referred to as updating, without limitation.

In one example, assuming that the context information of the sidelink is slice information and the slice information is an identifier of a V2V slice, the access network device updates the statistical information of the sidelink in the V2V slice after receiving the second indication information, and the access network device reconfigures the sidelink pool for D2D communication according to the updated statistical information of the sidelink. For details, reference may be made to the related example of the first indication information, and details are not described here.

and the access network equipment sends the information of the side link resource pool.

Accordingly, after receiving the information of the sidelink resource pool, the terminal can establish a sidelink with other terminals by using the resources in the sidelink resource pool to realize D2D communication between the two terminals.

Specifically, the access network device may send the information of the sidelink resource pool in a broadcast manner, or send the information of the sidelink resource pool in a unicast manner. For example, the access network device carries information of the sidelink resource pool through a System Information Block (SIB), and broadcasts the SIB.

The information of the sidelink resource pool may be information of frequency domain resources, for example, information indicating 100-120 MHz; or information of time domain resources, for example, information indicating time is 08:00-12:00 (i.e., 8 o 'clock to 12 o' clock); and may also be information of frequency domain resources and information of time domain resources, without limitation.

In addition, the information of the sidelink resource pool can be used for a terminal with the Uu port in an idle state or a connected state to establish a sidelink with other terminals by using the resource in the sidelink resource pool, so as to realize direct communication between the two terminals.

Optionally, in another implementation scenario of the foregoing embodiment, step 303 includes 303a and 303 b.

303a, the access network device determines the distribution of the sidelink for D2D communication according to the context information of the sidelink.

For example, the distribution of the sidelink for D2D communications across different slices and/or across different QoS requirements is determined.

303b, the access network device configures a sidelink resource pool for D2D communication according to the distribution.

In an example, taking a sidelink resource pool based on a slice as an example, and the context information of the sidelink is a V2V slice as an example, assuming that before the access network device receives the context information of the sidelink, the number of sidelink on the V2V slice is 9, the number of sidelink on the U2U slice is 3, the sidelink resource pool of the V2V slice is all time domain resources with a frequency of 100 plus 120MHz, and the sidelink resource pool of the U2U slice is all time domain resources with a frequency of 120 plus 130 MHz; after receiving the context information of the sidelink, the access network device determines that the number of sidelink in the V2V slice is 10 and the number of sidelink in the U2U slice is 3, then the access network device configures the sidelink resource pool in the V2V slice as all time domain resources with frequency of 100-122MHz, and configures the sidelink resource pool in the U2U slice as all time domain resources with frequency of 122-130 MHz.

In another example, taking a PQI-based sidelink resource pool as an example, assuming that the sidelink resource pool includes a sidelink resource pool with PQI ═ 1, a sidelink resource pool with PQI ═ 2, and a sidelink resource pool with PQI ═ 3, and context information of the sidelink is PQI ═ 2, before the access network device receives the context information of the sidelink, the number of sidelink with PQI ═ 1 is 2, the number of sidelink with PQI ═ 2 is 3, the number of sidelink with PQI ═ 3 is 3, the sidelink resource pool with PQI ═ 1 is all time domain resources with frequency of 110 and 120MHz, the sidelink resource pool with PQI ═ 2 is all time domain resources with frequency of 120 and 130MHz, and the sidelink resource pool with PQI ═ 3 is all time domain resources with frequency of 130 and 140 MHz; after the access network device receives the context information of the sidelink, the number of sidelinks with PQI ═ 1 is 2, the number of sidelinks with PQI ═ 2 is 4, and the number of sidelinks with PQI ═ 3 is 3, then the access network device configures the sidelink resource pool with PQI ═ 1 as all the time domain resources with the frequency of 110-.

Fig. 4 shows a schematic flow chart of another communication method of an embodiment of the present application, as described below.

401. The first terminal obtains context information of a sidelink.

Wherein the sidelink may be used for D2D communication between the first terminal and the second terminal.

402. The first terminal sends a second request message to the PCF.

The second request message carries context information of the sidelink, and the second request message may be used to request to authorize the first terminal to use a resource corresponding to the context information.

403. And the PCF sends a second response message to the first terminal according to the second request message.

And the second response message is used for indicating that the first terminal is authorized to use the resource corresponding to the context information.

It is noted that after step 403, the method further includes 404a or 404 b.

404a, PCF sends context information of the sidelink to the access network device of the first terminal.

404b, after receiving the second response message, the first terminal sends the context information of the sidelink to the access network device.

405. And the access network equipment configures the sidelink resource pool for D2D communication according to the sidelink context information.

Specifically, step 405 may refer to the related description of step 303, and is not described in detail.

For example, the sidelink, the context information, the D2D communication, the resource corresponding to the context information, the second request message, and the like may all refer to the relevant description in the embodiment shown in fig. 3, and are not described again.

By adopting the method provided by the embodiment, after the first terminal obtains the authorization of the PCF, the first terminal sends the context information of the sidelink to the access network equipment, so that the validity of the context information of the sidelink is ensured, and the accuracy of configuring the sidelink resource pool based on the context information of the sidelink is further improved; the access network equipment configures the sidelink resource pool for D2D communication according to the context information of the sidelink, so that the access network equipment can dynamically configure the sidelink resource pool for D2D communication according to the resource requirement of the sidelink, and the unreasonable configuration of the sidelink resource pool is avoided, for example, congestion occurs when the configuration of the sidelink resource pool is too small, or resource waste is caused by too large configuration of the sidelink resource pool, and the like.

Optionally, in an implementation scenario of the foregoing embodiment, the method further includes:

the PCF receives first indication information, wherein the first indication information is used for indicating the communication end of the sidelink;

PCF carries on charging statistics to the first terminal according to the first indication information; and/or the presence of a gas in the gas,

the PCF sends the first indication information to the access network equipment of the first terminal.

Accordingly, the access network device may reconfigure the sidelink resource pool for D2D communication according to the first indication information, which may specifically refer to the relevant description in the embodiment shown in fig. 3 and is not described again.

Specifically, the PCF performs charging statistics on the first terminal according to the first indication information, which may include: the PCF determines the time length of the D2D communication of the first terminal in combination with the second request message and the first indication information in 402, and charges the D2D communication of the first terminal based on the time length. Further, the PCF may also charge in combination with QoS requirement information or slice information. It should be noted that, different QoS requirements, different slices, and different charging may be used.

the PCF receives second indication information, wherein the second indication information is used for indicating the first terminal to switch across the network access equipment;

the PCF sends the second indication information to the access network device before the handover of the cross access network device occurs to the first terminal.

Accordingly, the access network device may reconfigure the sidelink resource pool for D2D communication according to the second indication information. Specifically, reference may be made to the related description in the embodiment shown in fig. 3, and details are not repeated.

It is to be understood that, in the above embodiments, the method and/or the steps implemented by the terminal device or the network device may also be implemented by a component (e.g., a chip or a circuit) that can be used for the terminal device or the network device.

The above-mentioned scheme provided by the embodiment of the present application is introduced mainly from the perspective of interaction between network elements. Correspondingly, the embodiment of the application also provides a communication device, and the communication device is used for realizing the various methods. The communication device may be a terminal device in the above method embodiment, for example, a sending terminal device or a receiving terminal device, or a device including the terminal device, such as various types of vehicles, or a device included in the terminal device, such as a system chip; alternatively, the communication device may be a network device in the above method embodiment, or a device included in the above network device, such as a system chip. It is understood that the communication device comprises means, modules or means (means) for implementing the above method for realizing the above functions, and the means, modules or means can be implemented by hardware, software or hardware executing the corresponding software. The hardware or software includes one or more modules or units corresponding to the above functions. Whether a function is performed as hardware or computer software drives hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

In the embodiment of the present application, the communication apparatus may be divided into functional modules according to the method embodiments, for example, each functional module may be divided corresponding to each function, or two or more functions may be integrated into one processing module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. It should be noted that, in the embodiment of the present application, the division of the module is schematic, and is only one logic function division, and there may be another division manner in actual implementation.

Fig. 5 is a schematic structural diagram of a communication apparatus according to an embodiment of the present application. The communication device 50 shown in fig. 5 includes one or more processors 501, a communication bus 502, and at least one communication interface (illustrated in fig. 5 as including a communication interface 504 and one processor 501 for example only). Optionally, the communication device 50 further comprises a memory 503.

The processor 501 may be a general processing unit (CPU), a microprocessor, an application-specific integrated circuit (asic), or one or more ics for controlling the execution of programs in accordance with the present disclosure.

The communication bus 502 may be a Peripheral Component Interconnect (PCI) bus, an Extended Industry Standard Architecture (EISA) bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in FIG. 5, but this is not intended to represent only one bus or type of bus. The communication bus 502 is used to connect the different components in the communication device 50 so that the different components can communicate.

The communication interface 504, which may be a transceiver module, is used to communicate with other devices or communication networks, such as ethernet, Radio Access Network (RAN), Wireless Local Area Networks (WLAN), etc. For example, the transceiver module may be a transceiver, or the like. Optionally, the communication interface 504 may also be a transceiver circuit located in the processor 501, so as to implement signal input and signal output of the processor.

The memory 503 may be a device having a storage function. Such as, but not limited to, read-only memory (ROM) or other types of static storage devices that may store static information and instructions, Random Access Memory (RAM) or other types of dynamic storage devices that may store information and instructions, electrically erasable programmable read-only memory (EEPROM), compact disk read-only memory (CD-ROM) or other optical disk storage, optical disk storage (including compact disk, laser disk, optical disk, digital versatile disk, blu-ray disk, etc.), magnetic disk storage or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer. The memory may be separate and coupled to the processor via a communication line 502. The memory may also be integral to the processor.

The memory 503 is used for storing computer instructions for executing the present application, and is controlled by the processor 501 to execute. The processor 501 is configured to execute the computer instructions stored in the memory 503, so as to implement the resource allocation method provided in the embodiment of the present application.

Alternatively, in this embodiment of the present application, the processor 501 may also execute functions related to processing in the resource configuration method provided in the following embodiments of the present application, and the communication interface 504 is responsible for communicating with other devices or a communication network, which is not specifically limited in this embodiment of the present application.

Optionally, the computer instructions in the embodiments of the present application may also be referred to as application program codes or instructions, which are not specifically limited in the embodiments of the present application.

In particular implementations, processor 501 may include one or more CPUs such as CPU0 and CPU1 in fig. 5 as an example.

In particular implementations, communication device 50 may include multiple processors, such as processor 501 and processor 508 in fig. 5, for example, as an example. Each of these processors may be a single-core (single-CPU) processor or a multi-core (multi-CPU) processor. A processor herein may refer to one or more devices, circuits, and/or processing cores for processing data (e.g., computer instructions).

In particular implementations, communication device 50 may also include an output device 505 and an input device 506, as one embodiment. An output device 505, which is in communication with the processor 501, may display information in a variety of ways. For example, the output device 505 may be a Liquid Crystal Display (LCD), a Light Emitting Diode (LED) display device, a Cathode Ray Tube (CRT) display device, a projector (projector), or the like. The input device 506 is in communication with the processor 501 and may receive user input in a variety of ways. For example, the input device 506 may be a mouse, a keyboard, a touch screen device, or a sensing device, among others.

In one possible implementation, the processor 501 may cause the communication device 50 to execute the method performed by the first terminal in the above-described method embodiment by calling the computer instructions stored in the memory 503. Therefore, the technical effects obtained by the method can be obtained by referring to the method embodiments, which are not described herein again.

In another possible implementation, the processor 501 may cause the communication device 50 to execute the method performed by the access network equipment in the above method embodiment by calling the computer instructions stored in the memory 503. Therefore, the technical effects obtained by the method can be obtained by referring to the method embodiments, which are not described herein again.

In another possible implementation, processor 501 may cause communications device 50 to perform the methods performed by the PCF in the above-described method embodiments by invoking computer instructions stored in memory 503. Therefore, the technical effects obtained by the method can be obtained by referring to the method embodiments, which are not described herein again.

Fig. 6 is a schematic configuration diagram of another communication apparatus according to an embodiment of the present application. The communication device 60 shown in fig. 6 includes a processing unit 601 and a transceiving unit 602.

The transceiver unit 602, which may also be referred to as a transceiver module, is used to implement a transmitting and/or receiving function, and may be, for example, a transceiver circuit, a transceiver, or a communication interface. The processing unit 601 may also be referred to as a processing module, and may be at least one processor, for example, without limitation.

In one possible design, the communication device 60 may be used to implement the functionality of the first terminal in the method embodiments shown in fig. 3 or 4.

A processing unit 601, configured to obtain context information of a sidelink used for D2D communication between the first terminal and the second terminal. A transceiving unit 602, configured to send, to an access network device, the context information of the sidelink, where the context information of the sidelink is used for the access network device to configure a sidelink resource pool for D2D communication.

Wherein the context information of the sidelink may include one or more of: slice information of the sidelink, and QoS requirement information of D2D traffic carried by the sidelink.

Wherein the slice information may include one or more of: a slice service type of the sidelink, and a slice identification of the sidelink.

Optionally, the transceiving unit 602 is further configured to: the method comprises the steps of sending a first request message to a policy control function PCF and receiving a first response message from the PCF.

Wherein the first request message is used for requesting the first terminal to be authorized for D2D communication, and the first response message is used for indicating that the first terminal is authorized for D2D communication; or, the first request message carries information of the D2D service carried by the sidelink, where the first request message is used to request that the first terminal is authorized to perform the D2D service carried by the sidelink, and the first response message is used to indicate that the first terminal is authorized to perform the D2D service carried by the sidelink.

Optionally, the transceiving unit 602 is further configured to: a second request message is sent to the PCF, and a second response message from the PCF is received.

The second request message carries context information of the sidelink, the second request message is used for requesting to authorize the first terminal to use the resource corresponding to the context information, and the second response message is used for indicating to authorize the first terminal to use the resource corresponding to the context information.

Optionally, the transceiver unit 602 is specifically configured to: when a side link resource pool corresponding to the side link context information is congested, sending the side link context information to the access network equipment; or when the communication state of the side link meets a preset condition, sending the context information of the side link to the access network equipment.

Optionally, the transceiving unit 602 is further configured to: when the side link is interrupted or the side link is deactivated, sending first indication information to the access network equipment or the PCF, wherein the first indication information is used for indicating the end of the communication of the side link; or, when the first terminal is switched across the network access device, sending second indication information to the access network device or the PCF, where the second indication information is used to indicate that the first terminal is switched across the network access device.

In another possible design, the communication device 60 may be used to implement the functionality of the access network equipment in the method embodiments shown in fig. 3 or 4.

A transceiving unit 602, configured to receive context information of a sidelink used for D2D communication between a first terminal and a second terminal.

A processing unit 601, configured to configure a sidelink resource pool for D2D communication according to the context information of the sidelink.

Wherein the sidelink resource pool may include: a slice-based sidelink resource pool, a PQI-based sidelink resource pool, or a slice and PQI-based sidelink resource pool.

Optionally, the transceiver unit 602 is further configured to receive indication information from the first terminal, where the indication information is used to indicate that communication of the sidelink is ended, or the indication information is used to indicate that the first terminal is switched across access network devices; the processing unit 601 is further configured to reconfigure the sidelink resource pool for D2D communication according to the indication information.

Optionally, the transceiver unit 602 is specifically configured to: receiving context information of the sidelink from the first terminal; alternatively, context information for the sidelink from the PCF is received.

In another possible design, communication device 60 may be used to implement the functionality of a PCF in the method embodiment shown in fig. 3 or 4.

A transceiving unit 602, configured to receive a first request message from a first terminal;

a processing unit 601, configured to send a first response message to the first terminal according to the first request message.

Wherein the first request message is used for requesting the first terminal to be authorized for D2D communication, and the first response message is used for indicating that the first terminal is authorized for D2D communication; or,

the first request message carries information of a D2D service, the first request message is used to request the first terminal to be authorized to perform the D2D service, and the first response message is used to indicate that the first terminal is authorized to perform the D2D service.

In yet another possible design, communication device 60 may be used to implement the functionality of a PCF in the method embodiment shown in fig. 3 or 4.

A transceiver unit 602, configured to receive a second request message from a first terminal, where the second request message carries context information of a sidelink, the sidelink is used for D2D communication between the first terminal and the second terminal, and the second request message is used to request that the first terminal is authorized to use a resource corresponding to the context information.

A processing unit 601, configured to send a second response message to the first terminal according to the second request message, where the second response message is used to indicate that the first terminal is authorized to use the resource corresponding to the context information.

Optionally, the transceiving unit 602 is further configured to: and sending the context information of the side link to the access network equipment of the first terminal.

Optionally, the transceiver 602 is further configured to receive first indication information, where the first indication information is used to indicate that communication of the sidelink is ended; the processing unit 601 is further configured to perform charging statistics on the first terminal according to the first indication information, and/or send the first indication information to the access network device of the first terminal through the transceiving unit 602.

Optionally, the transceiving unit 602 is further configured to: receiving second indication information, wherein the second indication information is used for indicating the first terminal to switch across network access equipment; and sending the second indication information to the access network equipment of the first terminal before the handover of the cross-access network equipment occurs.

In the embodiments of the present application, the processing module 601 is configured to receive or transmit the information or the message through the transceiver module 602, which may be understood that after the transceiver module 602 receives a signal carrying the information or the message sent from the outside, the signal is sent to the processing module 601 for processing with or without signal processing. Alternatively, in this embodiment of the application, the processing module 601 is configured to receive the information or the message through the transceiver module 602, which may be understood that after the transceiver module 602 receives a signal carrying the information or the message sent from the outside, the signal is sent to the processing module 601 for processing with or without signal processing. The description is unified here and will not be repeated below.

All relevant contents of each step related to the above method embodiment may be referred to the functional description of the corresponding functional module, and are not described herein again.

In the present embodiment, the communication device 60 is presented in a form of dividing each functional module in an integrated manner. As used herein, a "unit" or "module" may refer to a particular ASIC, circuitry, processor and memory that execute one or more software or firmware programs, integrated logic circuits, and/or other device that provides the described functionality. In a simple embodiment, one skilled in the art will appreciate that the communication device 60 may take the form of the communication device 50 shown in FIG. 4.

Illustratively, the functions/implementation procedures of the processing unit 601 and the transceiving unit 602 in fig. 6 may be implemented by the processor 501 in the communication apparatus 50 shown in fig. 5 calling the computer instructions stored in the memory 503. Alternatively, the function/implementation process of the processing unit 601 in fig. 6 may be implemented by the processor 501 in the communication apparatus 50 shown in fig. 5 calling a computer instruction stored in the memory 503, and the function/implementation process of the transceiving unit 602 in fig. 6 may be implemented by the communication interface 504 in the communication apparatus 50 shown in fig. 5.

Embodiments of the present application provide a computer-readable storage medium, on which computer instructions are stored, and when executed, the computer instructions perform the actions of the first terminal, the access network device, or the PCF in the method embodiment shown in fig. 3 or 4.

Embodiments of the present application provide a computer program product containing computer instructions, which when executed perform the actions of the first terminal, the access network device or the PCF in the method embodiment shown in fig. 3 or 4.

The embodiment of the application provides a communication system, which comprises access network equipment and also comprises a PCF. Further, the system can also comprise a first terminal.

The access network device may be configured to perform the method of the access network device in the embodiment shown in fig. 3 or 4, and the PCF may be configured to perform the method of the PCF in the embodiment shown in fig. 3 or 4.

The above embodiments may be implemented in whole or in part by software, hardware (e.g., circuitry), firmware, or any combination thereof. When implemented in software, the above-described embodiments may be implemented in whole or in part in the form of a computer program product. The computer program product comprises one or more computer instructions or computer programs. The procedures or functions according to the embodiments of the present application are wholly or partially generated when the computer instructions or the computer program are loaded or executed on a computer. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored on a computer readable storage medium or transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by wire (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that contains one or more collections of available media. The usable medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium. The semiconductor medium may be a solid state disk.

It should be understood that the term "and/or" herein is merely one type of association relationship that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone, wherein A and B can be singular or plural. In addition, the "/" in this document generally indicates that the former and latter associated objects are in an "or" relationship, but may also indicate an "and/or" relationship, which may be understood with particular reference to the former and latter text.

In the present application, "at least one" means one or more, "a plurality" means two or more. "at least one of the following" or similar expressions refer to any combination of these items, including any combination of the singular or plural items. For example, at least one (one) of a, b, or c, may represent: a, b, c, a-b, a-c, b-c, or a-b-c, wherein a, b, c may be single or multiple.

It should be understood that, in the various embodiments of the present application, the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

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

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a read-only memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

A method of communication, comprising:

a first terminal obtaining context information of a sidelink used for device-to-device D2D communication between the first terminal and a second terminal;

and the first terminal sends the context information of the sidelink to an access network device, wherein the context information of the sidelink is used for the access network device to configure a sidelink resource pool for D2D communication.
The method of claim 1, the contextual information of the sidelink comprising one or more of: slice information of the sidelink, and quality of service (QoS) requirement information of D2D service carried by the sidelink.
The method of claim 2, the slice information comprising one or more of: a slice service type of the sidelink, and a slice identification of the sidelink.
The method of any of claims 1-3, prior to the first terminal sending context information for the sidelink to an access network device, the method further comprising:

the first terminal sends a first request message to a Policy Control Function (PCF) and receives a first response message from the PCF;

wherein the first request message is used for requesting the first terminal to be authorized for D2D communication, and the first response message is used for indicating that the first terminal is authorized for D2D communication; or,

the first request message carries information of the D2D service carried by the sidelink, the first request message is used to request the first terminal to be authorized to perform the D2D service carried by the sidelink, and the first response message is used to indicate that the first terminal is authorized to perform the D2D service carried by the sidelink.
The method of any of claims 1-3, prior to the first terminal sending context information for the sidelink to an access network device, the method further comprising:

the first terminal sends a second request message to the PCF and receives a second response message from the PCF;

the second request message carries context information of the sidelink, the second request message is used for requesting to authorize the first terminal to use the resource corresponding to the context information, and the second response message is used for indicating to authorize the first terminal to use the resource corresponding to the context information.
The method of any of claims 1-5, wherein the first terminal sending context information for the sidelink to an access network device, comprises:

when a side link resource pool corresponding to the side link context information is congested, the first terminal sends the side link context information to the access network equipment; or,

and when the communication state of the side link meets a preset condition, the first terminal sends the context information of the side link to the access network equipment.
The method of any of claims 1-6, further comprising:

when the side link is interrupted or the side link is deactivated, the first terminal sends first indication information to the access network equipment or the PCF, wherein the first indication information is used for indicating the end of communication of the side link; or,

when the first terminal is switched across the network access equipment, the first terminal sends second indication information to the access network equipment or the PCF, and the second indication information is used for indicating the first terminal to be switched across the network access equipment.
A method of communication, comprising:

the access network device receiving context information of a sidelink for device-to-device D2D communication between the first terminal and the second terminal;

and the access network equipment configures a sidelink resource pool for D2D communication according to the context information of the sidelink.
The method of claim 8, the context information of the sidelink comprising one or more of: slice information of the sidelink, and quality of service (QoS) requirement information of D2D service carried by the sidelink.
The method of claim 8 or 9, the sidelink resource pool comprising: a slice-based sidelink resource pool, a sidelink resource pool that identifies PQI based on PC 55G quality of service, or a slice and PQI based sidelink resource pool.
The method according to any one of claims 8-10, further comprising:

the access network equipment receives indication information from the first terminal, wherein the indication information is used for indicating the communication end of the sidelink, or the indication information is used for indicating the first terminal to switch across the access network equipment;

and the access network equipment reconfigures the side link resource pool for D2D communication according to the indication information.
The method of any of claims 8-11, the access network device receiving context information for a sidelink, comprising:

the access network equipment receives the context information of the side link from the first terminal; or,

the access network equipment receives the context information of the sidelink from the PCF.
A method of communication, comprising:

a policy control function PCF receives a first request message from a first terminal;

the PCF sends a first response message to the first terminal according to the first request message;

wherein the first request message is for requesting authorization of the first terminal for device-to-device D2D communication, and the first response message is for indicating authorization of the first terminal for D2D communication; or,

the first request message carries information of a D2D service, the first request message is used to request the first terminal to be authorized to perform the D2D service, and the first response message is used to indicate that the first terminal is authorized to perform the D2D service.
A method of communication, comprising:

a policy control function PCF receives a second request message from a first terminal, where the second request message carries context information of a sidelink, the sidelink is used for D2D communication between the first terminal and a second terminal, and the second request message is used for requesting authorization of the first terminal to use a resource corresponding to the context information;

and the PCF sends a second response message to the first terminal according to the second request message, wherein the second response message is used for indicating that the first terminal is authorized to use the resources corresponding to the context information.
The method of claim 14, the context information of the sidelink comprising one or more of: slice information of the sidelink, and quality of service (QoS) requirement information of D2D service carried by the sidelink.
The method of claim 14 or 15, further comprising:

and the PCF sends the context information of the side link to the access network equipment of the first terminal.
The method according to any one of claims 14-16, the method further comprising:

the PCF receives first indication information, wherein the first indication information is used for indicating the end of the communication of the sidelink;

and the PCF carries out charging statistics on the first terminal according to the first indication information, and/or the PCF sends the first indication information to access network equipment of the first terminal.
The method according to any one of claims 14-17, further comprising:

the PCF receives second indication information, wherein the second indication information is used for indicating the first terminal to switch across the network access equipment;

and the PCF sends the second indication information to the access network equipment before the first terminal is switched to the cross-access network equipment.
A communications apparatus, comprising:

a processing unit configured to obtain context information of a sidelink used for device-to-device D2D communication between a first terminal and a second terminal;

a transceiving unit, configured to send context information of the sidelink to an access network device, where the context information of the sidelink is used for the access network device to configure a sidelink resource pool for D2D communication.
The communications apparatus of claim 19, the contextual information of the sidelink includes one or more of: slice information of the sidelink, and quality of service (QoS) requirement information of D2D service carried by the sidelink.
The communications apparatus of claim 20, the slice information comprises one or more of: a slice service type of the sidelink, and a slice identification of the sidelink.
The communication device according to any of claims 19-21, the transceiving unit further to:

sending a first request message to a Policy Control Function (PCF), and receiving a first response message from the PCF;

wherein the first request message is used for requesting the first terminal to be authorized for D2D communication, and the first response message is used for indicating that the first terminal is authorized for D2D communication; or,

the first request message carries information of the D2D service carried by the sidelink, the first request message is used to request the first terminal to be authorized to perform the D2D service carried by the sidelink, and the first response message is used to indicate that the first terminal is authorized to perform the D2D service carried by the sidelink.
The communication device according to any of claims 19-21, the transceiving unit further to:

sending a second request message to the PCF, and receiving a second response message from the PCF;

the second request message carries context information of the sidelink, the second request message is used for requesting to authorize the first terminal to use the resource corresponding to the context information, and the second response message is used for indicating to authorize the first terminal to use the resource corresponding to the context information.
The communication device according to any of claims 19 to 23, wherein the transceiver unit is specifically configured to:

when a side link resource pool corresponding to the side link context information is congested, sending the side link context information to the access network equipment; or,

and when the communication state of the side link meets a preset condition, sending the context information of the side link to the access network equipment.
The communication device according to any of claims 19-24, the transceiver unit further configured to:

when the side link is interrupted or the side link is deactivated, sending first indication information to the access network equipment or the PCF, wherein the first indication information is used for indicating the end of the communication of the side link; or,

and when the first terminal is switched across the network access equipment, sending second indication information to the access network equipment or the PCF, wherein the second indication information is used for indicating the first terminal to be switched across the network access equipment.
A communications apparatus, comprising:

a transceiving unit for receiving context information of a sidelink for device-to-device D2D communication between a first terminal and a second terminal;

and the processing unit is used for configuring a sidelink resource pool for D2D communication according to the context information of the sidelink.
The communications apparatus of claim 26, the contextual information of the sidelink includes one or more of: slice information of the sidelink, and quality of service (QoS) requirement information of D2D service carried by the sidelink.
The communications apparatus of claim 26 or 27, the sidelink resource pool comprising: a slice-based sidelink resource pool, a sidelink resource pool that identifies PQI based on PC 55G quality of service, or a slice and PQI based sidelink resource pool.
The communications apparatus according to any one of claims 26 to 28, wherein the transceiver unit is further configured to receive indication information from the first terminal, where the indication information is used to indicate that communication of the sidelink is ended, or the indication information is used to indicate that handover occurs between access network devices in the first terminal;

the processing unit is further configured to reconfigure a sidelink resource pool for D2D communication according to the indication information.
The communication device according to any of claims 26 to 29, wherein the transceiver unit is specifically configured to:

receiving context information of the sidelink from the first terminal; or,

context information for the sidelink from the PCF is received.
A communications apparatus, comprising:

a transceiving unit for receiving a first request message from a first terminal;

the processing unit is used for sending a first response message to the first terminal according to the first request message;

wherein the first request message is for requesting authorization of the first terminal for device-to-device D2D communication, and the first response message is for indicating authorization of the first terminal for D2D communication; or,

the first request message carries information of a D2D service, the first request message is used to request the first terminal to be authorized to perform the D2D service, and the first response message is used to indicate that the first terminal is authorized to perform the D2D service.
A communications apparatus, comprising:

a transceiver unit, configured to receive a second request message from a first terminal, where the second request message carries context information of a sidelink, the sidelink is used for device-to-device D2D communication between the first terminal and the second terminal, and the second request message is used to request to authorize the first terminal to use a resource corresponding to the context information;

and a processing unit, configured to send a second response message to the first terminal according to the second request message, where the second response message is used to indicate that the first terminal is authorized to use the resource corresponding to the context information.
The communications apparatus of claim 32, the contextual information of the sidelink includes one or more of: slice information of the sidelink, and quality of service (QoS) requirement information of D2D service carried by the sidelink.
The communication device of claim 32 or 33, the transceiver unit further configured to:

and sending the context information of the side link to the access network equipment of the first terminal.
The communication device according to any of claims 32-34, wherein the transceiver unit is further configured to receive first indication information, where the first indication information is used to indicate that the communication of the sidelink is ended;

the processing unit is further configured to perform charging statistics on the first terminal according to the first indication information, and/or send the first indication information to the access network device of the first terminal through the transceiving unit.
The communication device according to any of claims 32-35, the transceiver unit further configured to:

receiving second indication information, wherein the second indication information is used for indicating the first terminal to switch across network access equipment;

and sending the second indication information to the access network equipment of the first terminal before the handover of the cross-access network equipment occurs.
A communication device comprising a processor and a memory;

the memory for storing a computer program;

the processor to invoke a computer program stored in the memory to perform the method of any of claims 1-18.
A computer-readable storage medium, characterized in that the readable storage medium stores a computer program which, when executed, implements the method according to any one of claims 1-18.
A computer program product which, when run on a processor, causes the processor to perform the method of any one of claims 1-18.