WO2021136301A1

WO2021136301A1 - Communication method and apparatus

Info

Publication number: WO2021136301A1
Application number: PCT/CN2020/141054
Authority: WO
Inventors: 邢玮俊; 吴问付
Original assignee: 华为技术有限公司
Priority date: 2019-12-30
Filing date: 2020-12-29
Publication date: 2021-07-08
Also published as: CN113412679A; CN113412679B; CN113132985A

Abstract

Provided are a communication method and apparatus, wherein same can solve the problem of being unable to carry out proximity-based services due to a mismatch between an announcing parameter and a monitoring parameter caused by the fact that network configuration subjects are different, thereby improving the reliability of the proximity-based services, and same can be applied to an Internet of Vehicles system, a V2X system, an autonomous driving system and an intelligent driving system. The method comprises: a first network element receiving an application identifier from a terminal, and sending the application identifier to a second network element; and the first network element then receiving a discovery parameter from the second network element, and sending the discovery parameter to the terminal, wherein the discovery parameter corresponds to the application identifier. After that, the terminal can complete a discovery phase of ProSe communication and establish a ProSe communication connection according to the discovery parameter.

Description

Communication method and device

This application claims the priority of a Chinese patent application filed with the State Intellectual Property Office, the application number is 201911400828.5, and the application name is "communication method and device" on December 30, 2019, the entire content of which is incorporated into this application by reference.

Technical field

This application relates to the field of communication, and in particular to a communication method and device.

Background technique

Direct communication between terminals usually includes a discovery phase and a communication phase. Take proximity services (proximity-based services, ProSe) as an example. In the discovery phase, the announcing user equipment (AUE) uses the publishing parameters to issue ProSe communication requests, and the monitoring terminal (monitoring user equipment, MUE) uses the monitoring parameters to monitor whether it exists. ProSe communication request. If the monitoring parameters match the publishing parameters (collectively referred to as discovery parameters), it is considered that the publishing terminal and the monitoring terminal are close, and ProSe communication can be established. In this way, the publishing terminal can initiate a ProSe communication connection establishment process to the monitoring terminal, or monitor The terminal can initiate a ProSe communication connection establishment process to the publishing terminal.

However, the aforementioned publishing parameters are usually configured by the home public land mobile network (HPLMN) of the publishing terminal, and the listening parameters are usually configured by the HPLMN of the listening terminal. When the HPLMN of the publishing terminal is different from the HPLMN of the monitoring terminal, or although the publishing terminal and the monitoring terminal belong to the same PLMN, but the configuration network element of the publishing parameter is different from the configuration network element of the monitoring parameter, there may be a mismatch between the publishing parameter and the monitoring parameter This phenomenon leads to the failure of the discovery phase and the inability of proximity services, that is, the reliability of existing proximity services is poor.

Summary of the invention

The embodiments of the present application provide a communication method and device, which can solve the problem of mismatch between publishing parameters and monitoring parameters caused by different network configuration subjects, which in turn leads to the inability of proximity services, thereby improving the reliability of proximity services.

In order to achieve the above objectives, this application adopts the following technical solutions:

In the first aspect, a communication method is provided. The communication method includes: a first network element receives an application identifier from a terminal, and sends the application identifier to a second network element. Then, the first network element receives the discovery parameter from the second network element, and sends the discovery parameter to the terminal. Among them, the discovery parameter corresponds to the application identifier.

Based on the communication method provided in the first aspect, the first network element can request the second network element to configure discovery parameters corresponding to the application identifier according to the application identifier provided by the terminal. For example, the second network element may publish the application identifier provided by the terminal as The publishing terminal configures the publishing parameters, and configures the listening parameters for the listening terminal according to the same application identifier provided by the listening terminal, that is, the publishing parameters and the listening parameters correspond to the same application identification, which can solve the problem that the publishing parameters and the listening parameters are configured by different network elements. The resulting mismatch can increase the success rate of the discovery phase, thereby improving the reliability of proximity services.

In a possible design method, the terminal may include a publishing terminal, and the discovery parameter may include a publishing parameter. Among them, the release parameter is used to release the ProSe communication request of the ProSe from the terminal. Correspondingly, the communication method provided by the first aspect may further include: the first network element sends to the second network element the discovery mode that can be used by the proximity service ProSe corresponding to the application identifier, publishes the terminal identifier, or the first request indication One or more. Wherein, the first request indication is used to request to publish parameters.

In another possible design method, the terminal may include a monitoring terminal, and the discovery parameter may include a monitoring parameter. Among them, the monitoring parameter is used for monitoring the terminal to monitor the ProSe communication request of the proximity service. Correspondingly, the communication method provided in the first aspect may further include: the first network element sends to the second network element the discovery mode that can be used by the proximity service ProSe corresponding to the application identifier, the identifier of the monitoring terminal, or the second request indication. One or more. Wherein, the second request indication is used to request monitoring parameters.

In the embodiment of the present application, the publishing terminal may correspond to the monitoring terminal, and the publishing parameter may correspond to the monitoring parameter. Correspondingly, the publishing terminal can publish the ProSe communication request for ProSe that carries publishing parameters, and the monitoring terminal can use the listening parameters to monitor the ProSe communication request of the ProSe. For example, the monitoring terminal can determine whether the monitoring parameters match the publishing parameters carried in the ProSe communication request of the proximity service. If so, the monitoring terminal can send a ProSe response to the publishing terminal. Wherein, the ProSe response of the proximity service may carry configuration information for establishing the ProSe of the proximity service between the publishing terminal and the listening terminal, such as configuration information of wireless resources. Then, the publishing terminal and the listening terminal can implement ProSe communication based on the configuration information.

Optionally, the communication method provided by the first aspect may further include: a third network element (for example, a ProSe network element) sends an application identifier to a second network element (for example, a UDR network element or a UDM network element), and the terminal is in the application Identify the corresponding relationship between the authorized user ID in the corresponding application and the release parameter. This can refer to the further description of Fig. 10 or Fig. 11 later.

Optionally, the communication method provided in the first aspect may further include: the first network element receives the effective time of the discovery parameter from the second network element, and sends the effective time of the discovery parameter to the terminal. In this way, it can prevent the ProSe of a terminal from occupying discovery resources for a long time (usually pre-defined by the protocol or pre-configured by the network), causing other terminals to be unable to publish or monitor the ProSe of the proximity service, thereby improving the communication efficiency of the ProSe of the proximity service .

In the second aspect, a communication method is provided. The communication method includes: the second network element receives the correspondence between the application identifier and the discovery parameter from the third network element. Then, the second network element receives the application identifier from the first network element, and sends the discovery parameter to the first network element.

In a possible design method, the communication method provided in the second aspect may further include: the second network element receives from the third network element the discovery mode that can be used by the proximity service ProSe corresponding to the application identifier, and/or authorized The identification of the ProSe terminal that uses the ProSe corresponding to the application identification.

In a possible design method, the terminal may include a publishing terminal, and the discovery parameter may include a publishing parameter. Among them, the release parameter is used to release the ProSe communication request of the ProSe from the terminal. Correspondingly, the communication method provided by the second aspect may further include: the second network element receives one or more of the discovery mode from the first network element, issuing the identification of the terminal, and the first request indication; the first request indication is used for Request to publish parameters.

In another possible design method, the terminal may include a monitoring terminal, and the discovery parameter may include a monitoring parameter. Among them, the monitoring parameter is used for monitoring the terminal to monitor the ProSe communication request of the proximity service. Correspondingly, the communication method provided by the second aspect may further include: the second network element receives one or more of the discovery mode, the identifier of the monitoring terminal, and the second request indication from the first network element; the second request indication is used for Request monitoring parameters.

Optionally, the communication method provided by the second aspect may further include: the second network element receives the effective time of the discovery parameter from the third network element, and sends the effective time of the discovery parameter to the first network element.

For the technical effect of the communication method provided in the second aspect, reference may be made to the technical effect of the communication method provided in the first aspect, which will not be repeated here.

Optionally, the communication method provided by the second aspect may also be replaced by the following steps: the second network element (for example, UDR network element or UDM network element) may also receive the application identifier from the third network element (for example, ProSe network element) , The corresponding relationship between the user ID of the terminal in the application corresponding to the application ID and the release parameter. This can refer to the further description of Fig. 10 or Fig. 11 later.

In the third aspect, a communication method is provided. The communication method includes: a third network element obtains an application identifier. Then, the third network element sends the application identification and discovery parameters to the second network element. Among them, the discovery parameter corresponds to the application identifier.

Exemplarily, the discovery parameters may include publishing parameters and listening parameters. Among them, the release parameter is used to release the terminal to release the ProSe ProSe request, and the listening parameter is used to monitor the terminal to monitor the ProSe communication request of the ProSe.

Optionally, the communication method provided by the third aspect may further include: the third network element obtains the identity of the terminal that is authorized to use the ProSe ProSe corresponding to the application identity, and sends the identity of the terminal to the second network element.

Optionally, the communication method provided by the third aspect may further include: a third network element (for example, a ProSe network element) sends an application identifier to a second network element (for example, a UDR network element or a UDM network element), and the terminal is in the application Identify the corresponding relationship between the authorized user ID in the corresponding application and the release parameter. This can refer to the further description of Fig. 10 or Fig. 11 later.

Optionally, the communication method provided by the third aspect may further include: the third network element obtains a discovery mode that can be used by the proximity service ProSe corresponding to the application identifier, and sends the discovery mode to the second network element.

Further, the communication method provided by the third aspect may further include: the third network element determines the effective time of the discovery parameter, and sends the effective time of the discovery parameter to the second network element.

For the technical effects of the communication method provided in the third aspect, reference may be made to the technical effects of the communication method provided in the first aspect, which will not be repeated here.

In a fourth aspect, a communication method is provided. The communication method includes: a first network element receives an application identifier from a terminal, and sends the application identifier to a second network element. Then, the first network element learns that there is no discovery parameter corresponding to the application identifier in the second network element, and sends the application identifier to the third network element. After that, the first network element receives the discovery parameter from the third network element. Among them, the discovery parameter corresponds to the application identifier.

Based on the communication method provided by the fourth aspect, the first network element can request the second network element to configure discovery parameters corresponding to the application identifier according to the application identifier provided by the terminal, if there is no discovery corresponding to the application identifier in the second network element Parameter, the first network element can send the application identifier to the third network element, and request the third network element to configure discovery parameters corresponding to the application identifier. For example, the third network element can configure the publishing terminal according to the application identifier provided by the publishing terminal. Publish parameters, and configure listening parameters for the listening terminal according to the same application identifier provided by the listening terminal, that is, publishing parameters and listening parameters are corresponding to the same application identification, which can solve the problem of publishing parameters and listening parameters caused by different network element configurations. The mismatch problem can increase the success rate of the discovery phase, thereby improving the reliability of proximity services.

In a possible design method, the terminal may include a publishing terminal, and the discovery parameter may include a publishing parameter. Among them, the release parameter is used to release the ProSe communication request of the ProSe from the terminal. Correspondingly, the communication method provided by the fourth aspect may further include: the first network element sends to the third network element the discovery mode that can be used by the proximity service ProSe corresponding to the application identifier, publishes the terminal identifier, or the first request instruction. One or more. Wherein, the first request indication is used to request to publish parameters.

In another possible design method, the terminal may include a monitoring terminal, and the discovery parameter may include a monitoring parameter. Among them, the monitoring parameter is used for monitoring the terminal to monitor the ProSe communication request of the proximity service. Correspondingly, the communication method provided by the fourth aspect may further include: the first network element sends to the third network element the discovery mode that can be used by the proximity service ProSe corresponding to the application identifier, the identifier of the monitoring terminal, or one of the second request instructions. One or more. Wherein, the second request indication is used to request monitoring parameters.

Optionally, the communication method provided by the fourth aspect may further include: the first network element receives the effective time of the discovery parameter from the third network element, and sends the effective time of the discovery parameter to the terminal. In this way, it can prevent the ProSe of a terminal from occupying discovery resources for a long time (usually pre-defined by the protocol or pre-configured by the network), causing other terminals to be unable to publish or monitor the ProSe of the proximity service, thereby improving the communication efficiency of the ProSe of the proximity service .

In a fifth aspect, a communication method is provided. The communication method includes: the third network element receives the application identifier from the first network element. Then, the third network element determines the discovery parameter corresponding to the application identifier, and sends the discovery parameter to the first network element.

In a possible design method, the terminal may include a publishing terminal, and the discovery parameter may include a publishing parameter. Among them, the release parameter is used to release the ProSe communication request of the ProSe from the terminal. Correspondingly, the communication method provided by the fifth aspect may further include: the third network element receives from the first network element the discovery mode that can be used by the proximity service ProSe corresponding to the application identifier, publishes the terminal identifier, or the first request indication One or more. Wherein, the first request indication is used to request to publish parameters.

In another possible design method, the terminal may include a monitoring terminal, and the discovery parameter may include a monitoring parameter. Among them, the monitoring parameter is used for monitoring the terminal to monitor the ProSe communication request of the proximity service. Correspondingly, the communication method provided in the fifth aspect may further include: the third network element receives from the first network element the discovery mode that can be used by the proximity service ProSe corresponding to the application identifier, the identifier of the monitoring terminal, or the second request indication. One or more. Wherein, the second request indication is used to request monitoring parameters.

Optionally, the communication method provided by the fifth aspect may further include: the third network element determines the effective time of the discovery parameter, and sends the effective time of the discovery parameter to the first network element.

For the technical effect of the communication method provided in the fifth aspect, reference may be made to the technical effect of the communication method provided in the fourth aspect, which will not be repeated here.

In a sixth aspect, a communication device is provided. The communication device includes: a receiving module and a sending module. Among them, the receiving module is used to receive the application identifier from the terminal. The sending module is used to send the application identifier to the second network element. The receiving module is also used to receive the discovery parameter from the second network element; the discovery parameter corresponds to the application identifier. The sending module is also used to send discovery parameters to the terminal.

In a possible design, the terminal may include a publishing terminal, and the discovery parameter may include a publishing parameter. Among them, the release parameter is used to release the ProSe communication request of the ProSe from the terminal. Correspondingly, the sending module is further configured to send one or more of the available discovery mode of the proximity service ProSe corresponding to the application identifier, the identifier of the issuing terminal, or the first request instruction to the second network element. Wherein, the first request indication is used to request to publish parameters.

In another possible design, the terminal may include a monitoring terminal, and the discovery parameter may include a monitoring parameter. Among them, the monitoring parameter is used for monitoring the terminal to monitor the ProSe communication request of the proximity service. Correspondingly, the sending module is further configured to send to the second network element one or more of the available discovery mode of the ProSe corresponding to the application identifier, the identifier of the listening terminal, or the second request indication. Wherein, the second request indication is used to request monitoring parameters.

Optionally, the receiving module is also used to receive the effective time of the discovery parameter from the second network element; and the sending module is also used to send the effective time of the discovery parameter to the terminal.

Optionally, the communication device provided in the sixth aspect may further include a processing module and a storage module, and the storage module stores programs or instructions. When the processing module executes the program or instruction, the communication device provided in the sixth aspect can execute the communication method provided in the first aspect.

It should be noted that the communication device provided by the sixth aspect may be a first network element, such as a PCF network element or an AMF network element that configures discovery parameters for the terminal, or a chip or chip system set in the first network element. This application does not limit this.

For the technical effect of the communication device provided in the sixth aspect, reference may be made to the technical effect of the communication method provided in the first aspect, which will not be repeated here.

In a seventh aspect, a communication device is provided. The communication device includes: a receiving module and a sending module. Wherein, the receiving module is configured to receive the correspondence between the application identifier and the discovery parameter from the third network element. The receiving module is also used to receive the application identifier from the first network element. The sending module is used to send the discovery parameters to the first network element.

In a possible design, the receiving module is also used to receive from the third network element the discovery mode that can be used by the ProSe corresponding to the application identifier, and/or the terminal authorized to use the ProSe corresponding to the application identifier Of the logo.

In a possible design, the terminal may include a publishing terminal, and the discovery parameter may include a publishing parameter. Among them, the release parameter is used to release the ProSe communication request of the ProSe from the terminal. Correspondingly, the receiving module is further configured to receive one or more of the discovery mode, the identification of the issuing terminal, and the first request indication from the first network element. Wherein, the first request indication is used to request to publish parameters.

In another possible design, the terminal may include a monitoring terminal, and the discovery parameter may include a monitoring parameter. Among them, the monitoring parameter is used for monitoring the terminal to monitor the ProSe communication request of the proximity service. Correspondingly, the receiving module is further configured to receive one or more of the discovery mode, the identification of the monitoring terminal, and the second request indication from the first network element. Wherein, the second request indication is used to request monitoring parameters.

Optionally, the receiving module is further configured to receive the effective time of the discovery parameter from the third network element; and the sending module is further configured to send the effective time of the discovery parameter to the first network element.

Optionally, the communication device provided in the seventh aspect may further include a processing module and a storage module, and the storage module stores programs or instructions. When the processing module executes the program or instruction, the communication device provided in the seventh aspect can execute the communication method provided in the second aspect.

It should be noted that the communication device provided in the seventh aspect may be a second network element, such as a UDR network element for storing discovery parameters, or a chip or chip system set in the second network element. Not limited.

For the technical effect of the communication device provided in the seventh aspect, reference may be made to the technical effect of the communication method provided in the first aspect, which will not be repeated here.

In an eighth aspect, a communication device is provided. The communication device includes: a processing module and a transceiver module. Among them, the processing module is used to obtain the application identifier. The transceiver module is used to send application identification and discovery parameters to the second network element. Among them, the discovery parameter corresponds to the application identifier.

Optionally, the processing module is also used to obtain the identity of the terminal that is authorized to use the ProSe ProSe corresponding to the application identity; and the transceiver module is also used to send the identity of the terminal to the second network element.

Optionally, the processing module is further configured to obtain a discovery mode that can be used by the proximity service ProSe corresponding to the application identifier; and the transceiver module is further configured to send the discovery mode to the second network element.

Further, the processing module is also used to determine the effective time of the discovery parameter; and the transceiver module is also used to send the effective time of the discovery parameter to the second network element.

Optionally, the communication device provided in the eighth aspect may further include a storage module, and the storage module stores a program or an instruction. When the processing module executes the program or instruction, the communication device provided in the eighth aspect can execute the communication method provided in the third aspect.

It should be noted that the communication device provided in the eighth aspect may be a third network element, such as a ProSe function network element for generating discovery parameters, or a PCF network element or AF network element with ProSe network element function The NF network element, etc., may also be a chip or a chip system set in the third network element, which is not limited in this application.

For the technical effect of the communication device provided in the eighth aspect, reference may be made to the technical effect of the communication method provided in the first aspect, which will not be repeated here.

In a ninth aspect, a communication device is provided. The communication device includes: a processing module and a transceiver module. Among them, the transceiver module is used to receive the application identifier from the terminal and send the application identifier to the second network element. The processing module is used to learn that there is no discovery parameter corresponding to the application identifier in the second network element. The transceiver module is also used to send the application identifier to the third network element and receive discovery parameters from the third network element. Among them, the discovery parameter corresponds to the application identifier.

In a possible design, the terminal may include a publishing terminal, and the discovery parameter may include a publishing parameter. Among them, the release parameter is used to release the ProSe communication request of the ProSe from the terminal. Correspondingly, the transceiver module is further configured to send one or more of the available discovery mode of the proximity service ProSe corresponding to the application identifier, the identifier of the issuing terminal, or the first request instruction to the third network element. Wherein, the first request indication is used to request to publish parameters.

In another possible design, the terminal may include a monitoring terminal, and the discovery parameter may include a monitoring parameter. Among them, the monitoring parameter is used for monitoring the terminal to monitor the ProSe communication request of the proximity service. Correspondingly, the transceiver module is further configured to send to the third network element one or more of the available discovery mode of the proximity service ProSe corresponding to the application identifier, the identifier of the listening terminal, or the second request indication. Wherein, the second request indication is used to request monitoring parameters.

Optionally, the transceiver module is further configured to receive the effective time of the discovery parameter from the third network element, and send the effective time of the discovery parameter to the terminal.

Optionally, the communication device provided by the ninth aspect may further include a storage module, and the storage module stores a program or an instruction. When the processing module executes the program or instruction, the communication device provided by the ninth aspect can execute the communication method provided by the fourth aspect.

It should be noted that the communication device provided in the ninth aspect may be a first network element, such as a PCF network element or an AMF network element that configures discovery parameters for the terminal, or a chip or chip system set in the first network element. This application does not limit this.

For the technical effect of the communication device provided in the ninth aspect, reference may be made to the technical effect of the communication method provided in the fourth aspect, which will not be repeated here.

In a tenth aspect, a communication device is provided. The communication device includes: a processing module and a transceiver module. Among them, the transceiver module is used to receive the application identifier from the first network element. The processing module is used to determine the discovery parameter corresponding to the application identifier. The transceiver module is also used to send discovery parameters to the first network element.

In a possible design, the terminal may include a publishing terminal, and the discovery parameter may include a publishing parameter. Among them, the release parameter is used to release the ProSe communication request of the ProSe from the terminal. Correspondingly, the transceiver module is also used to receive from the first network element one or more of the available discovery mode of the ProSe corresponding to the application identification, the identification of the issuing terminal, or the first request indication. Wherein, the first request indication is used to request to publish parameters.

In another possible design, the terminal may include a monitoring terminal, and the discovery parameter may include a monitoring parameter. Among them, the monitoring parameter is used for monitoring the terminal to monitor the ProSe communication request of the proximity service. Correspondingly, the transceiver module is further configured to receive from the first network element one or more of the available discovery mode of the proximity service ProSe corresponding to the application identifier, the identifier of the monitoring terminal, or the second request indication. Wherein, the second request indication is used to request monitoring parameters.

Optionally, the processing module is further used to determine the effective time of the discovery parameter; and the transceiver module is further used to send the effective time of the discovery parameter to the first network element.

Optionally, the communication device provided in the tenth aspect may further include a storage module that stores a program or instruction. When the processing module executes the program or instruction, the communication device provided in the tenth aspect can execute the communication method provided in the fifth aspect.

It should be noted that the communication device provided in the tenth aspect may be a third network element, such as a ProSe function network element for generating discovery parameters, or a PCF network element or AF network element with the function of a ProSe network element. Element, NF network element, etc., may also be a chip or chip system set in a third network element, which is not limited in this application.

For the technical effect of the communication device provided in the tenth aspect, reference may be made to the technical effect of the communication method provided in the fourth aspect, which will not be repeated here.

In an eleventh aspect, a communication device is provided. The communication device includes: a processor coupled with a memory, the memory is used to store a computer program; the processor is used to execute the computer program stored in the memory, so that the communication device executes any one of the first aspect to the fifth aspect Possible implementations of the communication method described.

In a possible design, the communication device provided in the eleventh aspect may further include a transceiver. The transceiver can be a transceiver circuit or an input/output port. The transceiver can be used for the communication device to communicate with other communication devices.

In this application, the communication device provided by the eleventh aspect may be a core network element, or a chip or chip system set inside the core network element.

For the technical effect of the communication device provided in the eleventh aspect, reference may be made to the technical effect of the communication method described in any one of the possible implementation manners of the first aspect to the fifth aspect, and details are not described herein again.

In a twelfth aspect, a chip system is provided. The chip system includes a processor and an input/output port. The processor is configured to implement the processing functions involved in the first to fifth aspects. To realize the transceiver functions involved in the first aspect to the fifth aspect.

In a possible design, the chip system further includes a memory, and the memory is used to store program instructions and data for implementing the functions involved in the first aspect to the fifth aspect.

The chip system can be composed of chips, or include chips and other discrete devices.

The thirteenth aspect provides a communication system. The system includes multiple terminal devices, such as a publishing terminal and a monitoring terminal, and multiple core network elements, such as the aforementioned first network element, second network element, and third network element.

In a fourteenth aspect, a computer-readable storage medium is provided, including: computer instructions are stored in the computer-readable storage medium; when the computer instructions are executed on a computer, the computer is caused to execute the first to fifth aspects. Any one of the possible implementations of the communication method.

In a fifteenth aspect, a computer program product is provided, including a computer program or instruction. When the computer program or instruction runs on a computer, the computer executes any one of the possible implementation manners of the first aspect to the fifth aspect The communication method described.

Description of the drawings

FIG. 1 is a schematic diagram 1 of the architecture of a communication system provided by an embodiment of this application;

FIG. 2 is a second schematic diagram of the architecture of the communication system provided by an embodiment of the application;

FIG. 3 is a first structural diagram of a communication device provided by an embodiment of this application;

FIG. 4 is a first schematic flowchart of a communication method provided by an embodiment of this application;

FIG. 5 is a second schematic diagram of the flow of the communication method provided by an embodiment of this application;

FIG. 6 is a third schematic flowchart of a communication method provided by an embodiment of this application;

FIG. 7 is a fourth flowchart of a communication method provided by an embodiment of this application;

FIG. 8 is a fifth schematic flowchart of a communication method provided by an embodiment of this application;

FIG. 9 is a sixth flowchart of a communication method provided by an embodiment of this application;

FIG. 10 is a seventh schematic flowchart of a communication method provided by an embodiment of this application;

FIG. 11 is an eighth flowchart of a communication method provided by an embodiment of this application;

FIG. 12 is a second structural diagram of a communication device provided by an embodiment of this application;

FIG. 13 is a third structural diagram of a communication device provided by an embodiment of this application.

Detailed ways

The technical solution in this application will be described below in conjunction with the accompanying drawings.

The technical solutions of the embodiments of the present application can be applied to various communication systems, such as car networking communication systems, V2X communication systems, inter-device (device-todevie, D2D) communication systems, long term evolution (LTE) systems, and global interconnections. The worldwide interoperability for microwave access (WiMAX) communication system, the fifth generation (5G) mobile communication system, such as the new radio (NR) system, and the future communication system, such as the sixth generation ( 6th generation, 6G) mobile communication system, etc.

This application will present various aspects, embodiments, or features around a system that may include multiple devices, components, modules, and the like. It should be understood and understood that each system may include additional devices, components, modules, etc., and/or may not include all the devices, components, modules, etc. discussed in conjunction with the accompanying drawings. In addition, a combination of these schemes can also be used.

In addition, in the embodiments of the present application, words such as "exemplary" and "for example" are used to represent examples, illustrations, or illustrations. Any embodiment or design solution described as an "example" in this application should not be construed as being more preferable or advantageous than other embodiments or design solutions. Rather, the term example is used to present the concept in a concrete way.

In the examples of this application, "of", "corresponding (relevant)" and "corresponding" can sometimes be used together. It should be noted that when the difference is not emphasized, what it wants to express The meaning is the same.

The network architecture and business scenarios described in the embodiments of this application are intended to more clearly illustrate the technical solutions of the embodiments of this application, and do not constitute a limitation on the technical solutions provided in the embodiments of this application. Those of ordinary skill in the art will know that with the network With the evolution of architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of the present application are equally applicable to similar technical problems.

To facilitate the understanding of the embodiments of the present application, first, the communication system shown in FIG. 1 is taken as an example to describe in detail the communication system applicable to the embodiments of the present application. FIG. 1 is a schematic diagram 1 of the architecture of a communication system to which the communication method provided in an embodiment of the application is applicable. It should be noted that the solutions in the embodiments of the present application can also be applied to other mobile communication systems, and the corresponding names can also be replaced with the names of corresponding functions in other mobile communication systems.

As shown in Figure 1, the communication system includes multiple core network elements, such as a first network element, a second network element, and a third network element.

The first network element is used to receive the application identifier from the terminal and send the application identifier to the second network element. And, the first network element is also used to receive the discovery parameters from the second network element and send the discovery parameters to the terminal. Among them, the discovery parameter corresponds to the application identifier.

Correspondingly, the second network element is used to receive the correspondence between the application identifier and the discovery parameter from the third network element. And, the second network element is also used to receive the application identifier from the first network element, and send the discovery parameter to the first network element.

And, correspondingly, the third network element is used to obtain the application identifier. The third network element is also used to send application identification and discovery parameters to the second network element. Among them, the discovery parameter corresponds to the application identifier, that is, there is a corresponding relationship between the discovery parameter and the application identifier.

Further, if the discovery parameter corresponding to the application identifier does not exist in the second network element, and if the application or service corresponding to the application identifier is a newly launched application or service, the first network element may also directly request the third network element Discovery parameters corresponding to the application identifier provided by the terminal.

The first network element is used to receive the application identifier from the terminal and send the application identifier to the second network element. The first network element is also used to learn that there is no discovery parameter corresponding to the application identifier in the second network element, and send the application identifier to the third network element. The first network element is also used to receive discovery parameters from the third network element.

Correspondingly, the third network element is used to receive the application identifier from the first network element. The third network element is also used to determine the discovery parameter corresponding to the application identifier, and send the discovery parameter to the first network element.

It should be noted that the above-mentioned first network element can also be called a discovery parameter configuration network element, such as a PCF network element, AMF network element, and the second network element can also be called a discovery parameter storage network element, such as a unified data storage function. (unified data repository, UDR) network element or unified data management (unified data management, UDM) network element, the third network element can also be called a discovery parameter generation network element, such as an independent ProSe network element, or a proximity service function Network elements, such as PCF network elements, application function (AF) network elements, (network function, NF) network elements, etc.

Fig. 2 is an example of a communication system combining the communication system shown in Fig. 1 with a 5G core network. As shown in FIG. 2, the communication system may include multiple user equipment (UE), an access network, a core network, a data network (DN), and so on. Among them, the core network may include access and mobility management function (AMF) network elements, PCF network elements, UDM network elements, UDR network elements, session management function (session management function, SMF) network elements, (user plane function, UPF) network elements, network exposure function (NEF), application function (application function, AF) network elements, etc. The following describes the network elements involved in this application with reference to FIG. 2.

Among them, the UE may be referred to as a terminal, which may support proximity service, V2X communication, or other services. For example, the user equipment supports receiving or sending V2X messages. At this time, the terminal can also be called a V2X terminal. Among them, V2X messages may include, but are not limited to, vehicle-to-vehicle (V2V) messages, vehicle-to-pedestrian (V2P) messages, vehicle-to-network (V2N) messages, and vehicle-to-road infrastructure (vehicle to infrastructure, V2I) information, anti-collision messages between cars, entertainment application messages, navigation messages for interaction between cars, etc. Obviously, the terminal shown in FIG. 2 may include, but is not limited to, a vehicle-mounted terminal, a mobile phone, a tablet computer or a computer with a wireless transceiver function, a smart gas station, a smart signal lamp, and so on.

The access network may include one or more access network devices (or referred to as access network elements). The access network equipment is responsible for radio resource management, uplink and downlink data classification and quality of service (quality of service, QoS) applications, as well as complete signaling processing with control plane network elements, and complete data forwarding functions with UPF network elements. For example, the access network equipment may be a base station, a broadband network gateway (BNG), an aggregation switch, a non-3GPP access equipment, and so on. The base station may include various forms of base stations, such as: macro base stations, micro base stations (also referred to as small stations), relay stations, access points, etc., which are not specifically limited in the embodiment of the present application. The equipment that the terminal accesses to the core network is collectively referred to as the access network equipment in the text, and will not be described again. For example, the access network equipment can be the evolved universal terrestrial radio access network (E-UTRAN) equipment in the 4G network, and the next generation radio access network in the 5G network. , NG-RAN) equipment, etc.

The main functions of the AMF network element include the termination point of the control plane of the wireless access network, the termination point of non-access signaling, mobility management, lawful monitoring, access authorization/authentication, and so on.

UPF network element, used for routing and forwarding of packet data packets, QoS control of user plane data, accounting information statistics, etc.

SMF network elements are used for session management, terminal Internet protocol (IP) address allocation and management, selection of end points that can manage user plane functions, policy control and charging function interfaces, and downlink data notifications.

PCF network elements, used to manage network behaviors, provide user policies, access and mobility (AM) management policies, and session management (SM) policies to terminals, AMF network elements, or SMF network elements, respectively Related parameters. In the V2X communication scenario, the PCF network element provides information such as authentication and policy parameters related to the V2X communication to the terminal and the access network device.

UDM network elements are used to manage contract information and provide contract information to related network elements.

UDR network elements are used to provide storage and retrieval services for PCF network elements, open structured data storage and retrieval, and user information storage requested by application functions.

The NEF network element connects the core network network element and an external application server (application server), and provides services such as authentication and data forwarding when the external application server initiates a service request to the core network.

The AF network element may be an application server corresponding to the application, such as a localized application server. In the embodiments of this application, the ProSe APP server can be regarded as a kind of AF network element.

DN is a network used to transmit data, such as the Internet.

The communication interface between the terminal and the access network device is a Uu interface, and the communication interface between the terminal and the terminal is a PC5 interface. The application-level transmission interface between the terminal and the data transmission network is the V1 interface, and the application transmission interface between the terminals is the V5 interface.

It should be noted that a network composed of operator network elements other than RAN can be called a core network. In a 4G network, it includes a mobility management entity (mobile management entity, MME) and a service gateway (serving gateway, S- GW), public data network (public data network gateway, P-GW), home subscriber server (home subscriber server, HSS) and other network elements. In a 5G network, it includes AMF network elements, SMF network elements, and UPF network elements , UDM network element, PCF network element, etc. Figure 2 is only an example of a 5G network, and does not specifically limit the network elements of the core network.

It should be understood that FIG. 1 or FIG. 2 is only a simplified schematic diagram of an example for ease of understanding, and the communication system may also include other network devices, and/or other terminal devices, which are not shown in FIG. 1 or FIG. 2.

The aforementioned access network equipment and core network network elements may also be collectively referred to as network equipment. The access network device may include a device that is located on the network side of the above-mentioned communication system and has a wireless transceiver function, or a chip or chip system that can be set in the device. Among them, the access network equipment includes but is not limited to: access points (APs) in wireless fidelity (wireless fidelity, WiFi) systems, such as home gateways, routers, servers, switches, bridges, etc., evolved nodes B (evolved Node B, eNB), radio network controller (RNC), node B (Node B, NB), base station controller (BSC), base transceiver station (base transceiver station, BTS) ), home base station (for example, home evolved NodeB, or home Node B, HNB), baseband unit (BBU), wireless relay node, wireless backhaul node, transmission point (transmission and reception point, TRP or transmission point) , TP), etc., can also be 5G, such as the gNB in the new radio (NR) system, or the transmission point (TRP or TP), one or a group of base stations in the 5G system (including multiple antennas) Panel) Antenna panel, or, it can also be a network node that constitutes a gNB or transmission point, such as a baseband unit (BBU), or a distributed unit (DU), or a roadside unit with base station functions. RSU) and so on. Core network network elements include but are not limited to: AMF network elements, SMF network elements, PCF network elements, UPF network elements, NEF network elements, UDM network elements, UDR network elements, AF network elements, NF network elements, etc.

The above-mentioned terminal equipment is a terminal that is connected to the above-mentioned communication system and has a wireless transceiver function, or a chip or chip system that can be installed in the terminal. The terminal device may also be called a user device, an access terminal, a user unit, a user station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, a wireless communication device, a user agent, or a user device. The terminal device in the embodiment of the present application may be a mobile phone (mobile phone), a tablet computer (Pad), a computer with a wireless transceiver function, a virtual reality (VR) terminal device, and an augmented reality (AR) terminal Equipment, wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical, wireless terminals in smart grid, transportation safety ( Wireless terminals in transportation safety, wireless terminals in smart cities, wireless terminals in smart homes, vehicle-mounted terminals, RSUs with terminal functions, etc. The terminal device of the present application may also be a vehicle-mounted module, vehicle-mounted module, vehicle-mounted component, vehicle-mounted chip, or vehicle-mounted unit that is built into a vehicle as one or more components or units. The vehicle passes through the built-in vehicle-mounted module, vehicle-mounted module, The on-board component, on-board chip or on-board unit can implement the communication method provided in this application.

It should be noted that the communication method provided in the embodiments of this application can be used for terminals that support ProSe services, and are between the core network composed of the first network element, the second network element, and the third network element shown in FIG. Communication in the discovery phase of proximity services.

It should be noted that the terminal supporting the ProSe service mentioned in this application may include a publishing terminal and one or more monitoring terminals. Among them, the publishing terminal is a terminal that requests other terminals to provide proximity services within the same time period, and the monitoring terminal is a terminal that can monitor the ProSe communication request issued by the publishing terminal during the same time period and provide the proximity service for the publishing terminal.

In addition, the communication system architecture applied in the embodiment of the present application does not limit the system architecture shown in FIG. 1 or FIG. 2. That is to say, the system architecture shown in FIG. 1 or FIG. 2 is only an exemplary architecture diagram, that is, the number of network elements included in the communication system, the type of the network element, and the name of the network element are not limited. For example, in addition to the network elements shown in FIG. 1 or FIG. 2, the communication system shown in FIG. 1 or FIG. 2 may also include other functional entities. For another example, the network elements in the communication system shown in FIG. 1 or FIG. 2 and the names of each network element are just an example. In specific implementation, the names of each network element may be other names, and the embodiment of this application does not make specific details about this. limited. Terminals with PC5 interface communication capabilities can directly communicate with each other through the PC5 interface, regardless of whether the terminal is connected to the access network equipment. Specifically, a terminal that directly communicates through the PC5 interface can simultaneously use the Uu interface to connect to the access network device and use the PC5 interface to directly connect to other terminals. For example, while the terminal 1 and the terminal 4 in FIG. 2 use the PC5 interface to communicate directly, they can also use the Uu interface to communicate with the access network equipment. For another example, while terminal 1 and terminal 2 in FIG. 2 use the PC5 interface to communicate directly, terminal 1 can also use the Uu interface to communicate with the access network device, and terminal 2 does not communicate with the access network device. For another example, the terminal 2 and the terminal 3 in FIG. 2 only communicate directly using the PC5 interface, and neither of them communicates with the access network equipment.

FIG. 3 is a first structural diagram of a communication device that can be used to implement the communication method provided by the embodiment of the present application. The communication device can be any of the network elements shown in Figure 1 or Figure 2, such as the first network element, the second network element, and the third network element, or can be applied to any network element shown in Figure 1 or Figure 2. A chip in a network element, or other components that have the function of any network element. As shown in FIG. 3, the communication device 300 may include a processor 301. Optionally, the communication device 300 may further include a transceiver 302 and/or a memory 303. Wherein, the processor 301 is coupled with the transceiver 302 and the memory 303, for example, can be connected through a communication bus.

The components of the communication device 300 will be specifically introduced below in conjunction with FIG. 3.

The processor 301 is the control center of the communication device 300, and may be a processor or a collective name for multiple processing elements. For example, the processor 301 is one or more central processing units (CPU), or may be an application specific integrated circuit (ASIC), or may be configured to implement one or more of the embodiments of the present application. An integrated circuit, for example: one or more microprocessors (digital signal processors, DSP), or one or more field programmable gate arrays (FPGA).

The processor 301 can execute various functions of the communication device 300 by running or executing a software program stored in the memory 303 and calling data stored in the memory 303. For example, the communication device 300 may perform the function of the first network element or the second network element or the third network element shown in any one of FIGS. 4-9 below.

In a specific implementation, as an embodiment, the processor 301 may include one or more CPUs, such as CPU0 and CPU1 shown in FIG. 3.

In a specific implementation, as an embodiment, the communication device 300 may also include multiple processors, such as the processor 301 and the processor 304 shown in FIG. 3. Each of these processors can be a single-core processor (single-CPU) or a multi-core processor (multi-CPU). The processor here may refer to one or more communication devices, circuits, and/or processing cores for processing data (for example, computer program instructions).

The transceiver 302 is used for communication with other communication devices. For example, the communication device 300 may be a first network element or a second network element or a third network element, and the transceiver 302 may be used to communicate with other network elements or to communicate with terminal equipment. In addition, the transceiver 302 may include a receiver and a transmitter (not separately shown in FIG. 3). Among them, the receiver is used to realize the receiving function, and the transmitter is used to realize the sending function. The transceiver 302 may be integrated with the processor 301, or may exist independently, and is coupled with the processor 301 through the input/output port (not shown in FIG. 3) of the communication device 300, which is not specifically limited in the embodiment of the present application. .

The memory 303 can be a read-only memory (ROM) or other types of static storage communication devices that can store static information and instructions, a random access memory (RAM), or other types that can store information and instructions. The type of dynamic storage communication equipment can also be electrically erasable programmable read-only memory (EEPROM), compact disc read-only memory (CD-ROM) or other optical disk storage, Optical disc storage (including compact disc, laser disc, optical disc, digital versatile disc, Blu-ray disc, etc.), magnetic disk storage media or other magnetic storage communication devices, or can be used to carry or store desired program codes in the form of instructions or data structures and Any other medium that can be accessed by the computer, but not limited to this. The memory 303 may be integrated with the processor 301, or may exist independently, and is coupled with the processor 301 through the input/output port (not shown in FIG. 3) of the communication device 300, which is not specifically limited in the embodiment of the present application.

Wherein, the memory 303 is used to store a software program for executing the solution of the present application, and the software program may be controlled and executed by the processor 301. For the foregoing specific implementation manners, reference may be made to the following method embodiments, which will not be repeated here.

It should be noted that the structure of the communication device 300 shown in FIG. 3 does not constitute a limitation on the communication device. The actual communication device may include more or less components than those shown in the figure, or combine certain components, or Different component arrangements.

The communication method provided by the embodiment of the present application will be described in detail below in conjunction with FIG. 4 to FIG. 11.

FIG. 4 is a first schematic flowchart of a communication method provided by an embodiment of this application. This communication method can be applied to the ProSe communication between different network elements shown in Figure 1 or Figure 2, so as to configure discovery parameters for ProSe communication between different terminals in the discovery phase, such as configuring publishing parameters for publishing terminals and monitoring terminals Configure monitoring parameters.

The following takes the terminal and the first network element, the second network element, and the third network element shown in FIG. 1 as examples to describe the communication method shown in FIG. 4 in detail. As shown in Figure 4, the communication method includes the following S401-S406:

S401: The third network element obtains an application identifier.

Exemplarily, the third network element may also be called a discovery parameter generation network element, such as an independent ProSe network element, or other network elements with proximity service functions, such as PCF network elements and AF network elements in a 5G system Element, NF network element, etc., are mainly used to generate the correspondence between application identifiers and discovery parameters. The embodiments of the present application do not specifically limit the type and quantity of the network element of the third network element, and the manner of setting it with other network elements.

Exemplarily, the application identifier may be the proximity service provided by the AF network element deployed by the operator, such as the type identification (application identifier, APP ID) of voice communication and video communication, etc., or it may be a third party, such as a content provider (content provider). provider, CP) provided by the application, such as the logo of WeChat, Dianping, etc. The embodiments of the present application do not specifically limit the provider of the application or service corresponding to the application identifier, and the type of application or service corresponding to the application identifier. The way for the third network element to obtain the application identifier may be provided by the AF network element, or pre-set in the third network element by the operator.

After obtaining the application identifier, the third network element can determine the discovery parameter corresponding to the application identifier. Among them, the discovery parameters may include publishing parameters and listening parameters. Publish parameters, such as ProSe discovery key parameters (such as ProSe APP code, ProSe query code, ProSe response code, relay service code, etc.), which are used to publish a request for the terminal to publish a ProSe ProSe PreSe. Monitoring parameters, such as ProSe discovery matching parameters (discovery filter, discovery query filter, discovery response filter, etc.), are used to monitor the terminal to monitor the ProSe communication request of the proximity service.

In the embodiment of the present application, the publishing terminal corresponds to the monitoring terminal, and the publishing parameter corresponds to the monitoring parameter. Correspondingly, the publishing terminal can publish the ProSe communication request carrying the publishing parameters, and the monitoring terminal can use the monitoring parameters to monitor the ProSe communication request. For example, the monitoring terminal may determine whether the monitoring parameters match the publishing parameters carried in the ProSe communication request, for example, determining whether the aforementioned ProSe discovery matching parameters match the ProSe discovery key parameters. If so, the monitoring terminal can send a ProSe response to the publishing terminal. Among them, the ProSe response can carry configuration information used to establish ProSe communication between the publishing terminal and the monitoring terminal, such as wireless resource configuration information, the use of modulation & coding schemes (MCS), and quality of service (QoS) Parameters, the Internet Protocol (IP) address of the monitoring terminal, the Media Access Control (MAC) layer address, etc. Then, the monitoring terminal can provide proximity services for the publishing terminal based on the configuration information.

Optionally, the communication method shown in FIG. 4 may further include: the third network element obtains the identifier of the terminal that is authorized to use the ProSe ProSe corresponding to the application identifier, and/or the ProSe corresponding to the application identifier can be used Discover the pattern. Wherein, similar to the application identifier, the terminal identifier and the discovery mode can also correspond to the discovery parameters. In this way, the accuracy of the configured discovery parameters can be further improved, thereby improving the success rate of the discovery phase, and the reliability and efficiency of ProSe communication.

Exemplarily, a terminal that is authorized to use the ProSe corresponding to the application identifier refers to a terminal that supports the proximity service corresponding to the application identifier and has activated the proximity service with the operator or a third party. Correspondingly, the identification of the terminal that has been authorized to use the ProSe ProSe corresponding to the application identification refers to the identification of the terminal that can be recognized by the operator network element or third-party network element (ProSe APP ID, application layer ID, UE ID, etc.) . For example, the identification may include the identification of the terminal at the third-party application level, such as a WeChat account, a public comment account, an online game account, and so on. For another example, the identification of the terminal may also include an identification that can be recognized by the operator's core network element, such as a unified public user identifier (generic public subscription identifier, GPSI), a user permanent identifier (subscription permanent identifier, SUPI), mobile phone number, and terminal International mobile subscriber identification number (IMSI), etc.

In a possible design method, if the terminal's identity uses a third-party application-level identity, the terminal must also add an identity that can be recognized by the operator's core network element in the request message, such as WeChat ID and international A combination of mobile subscriber identification number (international mobile subscriber identification number, IMSI) so that the core network element can identify the terminal.

In the embodiment of the present application, the number of terminals authorized to use the ProSe ProSe corresponding to the application identifier may be multiple, and the types may be multiple. Correspondingly, there may also be multiple identities of the terminals authorized to use the ProSe ProSe corresponding to the application identities, for example, it may be a list of terminal identities containing multiple identities. The embodiment of this application does not specifically limit the specific implementation of the terminal that has been authorized to use the ProSe ProSe corresponding to the application identifier and its identifier.

Exemplarily, the discovery mode that can be used by the proximity service ProSe corresponding to the application identifier may include an open mode (open discovery) or a restricted mode (restricted discovery). Among them, the discovery mode can be determined by the proximity service provider, such as an AF network element or a third-party application server. For a certain proximity service, the public mode means that any terminal can use the proximity service, and the restricted mode means that only designated terminals can use the proximity service. Among them, the designated terminal refers to a terminal that has been authorized to use the proximity service. Therefore, when the discovery mode is the restricted mode, the third network element also needs to obtain identification information, such as an identification list, of terminal devices that are authorized to use the proximity service corresponding to the application identification.

Further, the communication method shown in FIG. 4 may further include: the third network element determines the effective time of the discovery parameter, and sends the effective time of the discovery parameter to the second network element. In this way, it can prevent the ProSe of a terminal from occupying discovery resources for a long time (usually pre-defined by the protocol or pre-configured by the network), causing other terminals to be unable to publish or monitor the ProSe of the proximity service, thereby improving the communication efficiency of the ProSe of the proximity service . In addition, the operator can control the time that the terminal can use the proximity service by setting the effective time of the discovery parameter, which is convenient for management such as billing.

S402: The third network element sends the corresponding relationship between the application identifier and the discovery parameter to the second network element. Correspondingly, the second network element receives the correspondence between the application identifier and the discovery parameter from the third network element.

Exemplarily, the second network element may also be referred to as a discovery parameter storage network element, such as a UDR network element or a UDM network element in a 5G system, and is used to uniformly store the correspondence between the application identifier and the discovery parameter. There may be multiple correspondences, such as correspondences between multiple different types of application identifiers generated by the same third network element or multiple different types of third network elements and respective discovery parameters.

In a possible design method, the communication method shown in FIG. 4 may further include: the third network element sends to the second network element the discovery mode that can be used by the proximity service ProSe corresponding to the application identifier, and/or authorized The identification of the ProSe terminal that uses the ProSe corresponding to the application identification. Correspondingly, the second network element receives from the third network element the discovery mode that can be used by the proximity service ProSe corresponding to the application identification, and/or the identification of the terminal that is authorized to use the proximity service ProSe corresponding to the application identification.

Exemplarily, when the discovery mode is the restricted mode, the foregoing correspondence relationship also needs to include the identity of the terminal that has been authorized to use the ProSe corresponding to the application identity. It should be understood that when the discovery mode is the public mode, the foregoing correspondence relationship may not include the discovery mode and the identification of the terminal that is authorized to use the proximity service ProSe corresponding to the application identification.

In a possible design method, the third network element can directly send the above corresponding relationship to the second network element, or through other operator network elements, such as the network exposure function (NEF) network in the 5G system. Element, sending the above-mentioned corresponding relationship to the second network element. The embodiments of the present application do not specifically limit this.

In this embodiment of the application, after performing S401 and S402, the second network element may collect the correspondence between multiple application identifiers and multiple sets of discovery parameters from one or more third network elements, and store them in the second network element's corresponding relationship. In storage space. In this way, the second network element can configure discovery parameters for the terminal according to the application identifier provided by the terminal, that is, perform the following S403-S406.

It should be noted that the correspondence between the above-mentioned multiple application identifiers and multiple sets of discovery parameters may also be pre-configured in the second network element. In this case, S401-S402 may not be executed, that is, S401-S402 are optional steps.

S403: The terminal sends an application identifier to the first network element. Correspondingly, the first network element receives the application identifier from the terminal.

Exemplarily, the first network element may also be referred to as a discovery parameter configuration network element, such as a PCF network element, AMF network element, etc. in a 5G system, which is mainly used for the application identification provided by the terminal and the correspondence between the application identification and the discovery parameter Relationship, configure the discovery parameters for the terminal. The embodiment of the present application does not specifically limit the type and quantity of the network element of the first network element, and the deployment mode with other network elements.

In a possible design method, the terminal may include a publishing terminal, and the discovery parameter may include a publishing parameter. Among them, the release parameter is used to release the ProSe communication request of the ProSe from the terminal. Correspondingly, the communication method shown in FIG. 4 may further include: the issuing terminal sends one of the discovery mode corresponding to the application identifier, the identification of the issuing terminal, or the first request instruction to the first network element. Or multiple. Correspondingly, the first network element receives one or more of the discovery mode, the identification of the publishing terminal, and the first request indication from the publishing terminal. Wherein, the first request indication is used to request to publish parameters. For example, the first request indication may be the following operation indication: command=annouce, command=ProSe response.

In another possible design method, the terminal may include a monitoring terminal, and the discovery parameter may include a monitoring parameter. Among them, the monitoring parameter is used for monitoring the terminal to monitor the ProSe communication request of the proximity service. Correspondingly, the communication method shown in FIG. 4 may further include: the monitoring terminal sends to the first network element one of a discovery mode that can be used by the proximity service ProSe corresponding to the application identifier, the identifier of the monitoring terminal, or the second request indication Or multiple. Correspondingly, the first network element receives one or more of the discovery mode, the identifier of the monitoring terminal, and the second request indication from the monitoring terminal. Wherein, the second request indication is used to request monitoring parameters. For example, the first request indication may be the following operation indication: command=monitor, command=ProSe query.

It should be noted that the above application identifier, the identifier of the publishing terminal, the discovery mode, and the first request indication may be sent by the publishing terminal to the first network element multiple times, for example, in multiple discovery request messages (discovery request). Sending can also be sent to the first network element at the same time, for example, it can be sent in the same discovery request message. In the same way, the above-mentioned application identifier, monitoring terminal identifier, discovery mode, and second request indication can be sent by the monitoring terminal to the first network element multiple times. For example, they can be sent separately in multiple discovery request messages, or they can be sent at the same time. For the first network element, if it can be sent in the same discovery request message. The embodiment of this application provides specific implementations for the issuing terminal to send the application identifier, the identity of the publishing terminal, the discovery mode, and the first request indication to the first network element, and the monitoring terminal sends the application identifier and the identifier of the monitoring terminal to the first network element , The discovery mode, and the implementation of the second request indication are not specifically limited.

It should be noted that when the discovery mode is restricted mode, the terminal needs to send the discovery mode and the identification of the terminal to the first network element, so that the first network element and the following second network element can determine whether the terminal has permission to use the application Identifies the corresponding proximity service.

In addition, the above-mentioned first request indication and the second request indication may be explicitly indicated, such as the above two operation indications, or implicitly indicated, for example, they may be distinguished by the message name. Specifically, the discovery request message initiated by the publishing terminal can be named announcing request message (announcing request) or a discovery key request message (discovery code request), and the discovery request message initiated by the monitoring terminal can be named monitoring request message (monitoring request) Or discovery filter request message (discovery filter request). The implementation manners of the first request instruction and the second request instruction in the embodiment of the present application are not specifically limited.

S404: The first network element sends the application identifier to the second network element. Correspondingly, the second network element receives the application identifier from the first network element.

In a possible design method, the terminal may include a publishing terminal, and the discovery parameter may include a publishing parameter. Among them, the release parameter is used to release the ProSe communication request of the ProSe from the terminal. Correspondingly, the communication method shown in FIG. 4 may further include: the first network element sends to the second network element the discovery mode that can be used by the proximity service ProSe corresponding to the application identifier, publishes the terminal identifier, or the first request indication. One or more. Correspondingly, the second network element receives one or more of the discovery mode, the identification of the issuing terminal, and the first request indication from the first network element. Wherein, the first request indication is used to request to publish parameters.

In another possible design method, the terminal may include a monitoring terminal, and the discovery parameter may include a monitoring parameter. Among them, the monitoring parameter is used for monitoring the terminal to monitor the ProSe communication request of the proximity service. Correspondingly, the communication method shown in FIG. 4 may further include: the first network element sends to the second network element the discovery mode that can be used by the proximity service ProSe corresponding to the application identifier, the identifier of the monitoring terminal, or the second request indication. One or more. Correspondingly, the second network element receives one or more of the discovery mode, the identifier of the monitoring terminal, and the second request indication from the first network element; the second request indication is used for requesting monitoring parameters. Wherein, the second request indication is used to request monitoring parameters.

It should be noted that the first network element sends to the second network element the first network element to send the application identifier, the terminal identifier, the discovery mode, the first request indication or the second request indication for the implementation manner, please refer to the above S403 terminal to send The implementation manner in which the first network element sends the application identifier, the terminal identifier, the discovery mode, the first request indication or the second request indication will not be repeated here.

S405: The second network element sends the discovery parameter to the first network element. Correspondingly, the first network element receives the discovery parameter from the second network element.

Wherein, the discovery parameter corresponds to the application identifier, that is, the discovery parameter is determined by the second network element according to the above-mentioned corresponding relationship.

Optionally, the communication method of FIG. 4 may further include: the second network element sends the effective time of the discovery parameter to the first network element. Optionally, the first network element receives the effective time of the discovery parameter from the second network element.

Exemplarily, S405 may be specifically implemented as: the second network element sends a discovery response message (discovery response) to the first network element. Correspondingly, the first network element receives the discovery response message from the second network element. Wherein, the discovery response message carries the discovery parameter corresponding to the application identifier. Among them, the discovery parameters may include publishing parameters or listening parameters. Optionally, the discovery response message may also carry the effective time of the discovery parameter.

It should be noted that when the discovery mode is the restricted mode, if the terminal does not have permission to use the proximity service corresponding to the application identifier, the second network element will send a service denial indication to the first network element. Wherein, the denial of service indication may be carried in the above discovery response message. In this case, the second network element may not send the publishing parameters to the first network element.

S406: The first network element sends the discovery parameter to the terminal. Correspondingly, the terminal receives the discovery parameter from the first network element.

Exemplarily, S406 may be specifically implemented as: the first network element sends a discovery response message to the terminal. Correspondingly, the terminal receives a discovery response message from the first network element. Wherein, the discovery response message carries the discovery parameter corresponding to the application identifier. Among them, the discovery parameters may include publishing parameters or listening parameters. Optionally, the discovery response message may also carry the effective time of the discovery parameter.

It should be noted that when the discovery mode is the restricted mode, if the terminal does not have permission to use the proximity service corresponding to the application identifier, the first network element may forward the service denial of service indication received from the second network element to the terminal. Wherein, the denial of service indication may be carried in the above discovery response message.

After performing S406, the terminal can complete the discovery phase of ProSe communication according to the discovery parameters. After that, between the terminals, such as the publishing terminal and the listening terminal, a ProSe communication connection can be established through signaling interaction, thereby realizing ProSe communication.

In the following, the communication method shown in FIG. 4 will be further explained in conjunction with specific examples.

Fig. 5 is an example one of the communication method shown in Fig. 4. 4 and 5, the first network element in FIG. 4 may include the first PCF network element and the second PCF network element in FIG. 5, and the second network element in FIG. 4 may be the UDR network element in FIG. 5. Or UDM network element, the third network element in FIG. 4 may be the ProSe network element in FIG. 5, and the terminal in FIG. 4 may include the publishing terminal and the listening terminal in FIG.

It should be noted that the above-mentioned UDM network element and UDR network element may be independent core network network elements or the same core network network element. The embodiment of this application does not limit the specific implementation of UDM network elements and UDR network elements. .

With reference to Figure 4, as shown in Figure 5, the above S401 can be implemented as the following S501-S502:

S501: The AF network element sends an application identifier to the ProSe network element. Correspondingly, the ProSe network element receives the application identifier from the AF network element.

Exemplarily, the AF network element may include a core network network element deployed by an operator, and the application identification provided by it may include an APP ID. The AF network element may also be a third party, such as an application server deployed by a content provider, and the application identification provided by it may include a third-party application identification. The embodiment of the present application does not limit specific implementation manners such as the provider of the AF network element, the number of AF network elements, or the type of proximity service provided by the AF network element.

Optionally, the ProSe network element may also receive from the AF network element the identifier of the terminal authorized to use the proximity service corresponding to the application identifier, such as the identifier list of the terminal authorized to use the proximity service corresponding to the application identifier.

It should be noted that if the proximity service corresponding to the application identifier limits the users who can use the application, the corresponding discovery mode will also be set to restricted mode, and the AF network element needs to provide the application identifier for the ProSe network element, and authorized Use the identifier of the proximity service terminal corresponding to the application identifier. If the discovery mode is the restricted mode, the AF also needs to provide the ProSe network element with user information that has been authorized to use the application for ProSe communication, such as the user account and the identification of the terminal bound to the user account. It should be understood that if the proximity service corresponding to the application identifier does not have a limited use right, the AF network element may not send the discovery mode to the ProSe network element. In this case, it can also be understood that the discovery mode of the proximity service corresponding to the application identifier is the public mode by default.

S502: The ProSe network element establishes/modifies/deletes the correspondence between the application identifier and the discovery parameter.

Regarding the specific implementation of the corresponding relationship, please refer to the related content in S401 for details, which will not be repeated here.

It should be noted that if the AF network element has the function of the ProSe network element, for example, the AF network element includes a module or component with the function of the ProSe network element, the AF network element can also obtain the application identification and discovery parameters of the proximity service provided by it locally. , The identification and discovery mode of the terminal that has been authorized to use the proximity service corresponding to the application identification, and the corresponding relationship is established based on the acquired information, that is, S501-S502 can be regarded as internal operations performed by the same network element.

In the embodiment of this application, the above-mentioned corresponding relationship can be newly established, such as when a new proximity service is online, or it can be modified, if an existing proximity service is adjusted, it can also be deleted, such as an existing proximity service. When the service goes offline.

With reference to FIG. 4, as shown in FIG. 5, the foregoing S402 may be specifically implemented as S503:

S503: The ProSe network element sends the corresponding relationship between the application identifier and the discovery parameter to the UDR network element. Correspondingly, the UDR receives and stores the correspondence between the application identifier and the discovery parameter from the ProSe network element.

Exemplarily, when the discovery mode is the restricted mode, the foregoing correspondence relationship also needs to include the identity of the terminal that has been authorized to use the ProSe corresponding to the application identity. It is easy to understand that when the discovery mode is the public mode, the foregoing correspondence relationship may not include the discovery mode and the identification of the terminal that is authorized to use the proximity service ProSe corresponding to the application identification.

It should be noted that if the AF network element has the function of the ProSe network element, S503 may be specifically implemented as: the AF network element sends the corresponding relationship between the application identifier and the discovery parameter to the UDR network element. At this time, if the AF network element is a third-party application server, when the AF network element sends the corresponding relationship to the core network UDR network element, it needs to be verified by the NEF network element, and then the NEF network element will pass the verified correspondence The relationship is forwarded to the UDR network element to ensure security.

In the embodiment of the present application, there is usually one UDR network element. The one UDR network element can receive and save multiple correspondences from multiple AF network elements of different types. The multiple correspondences can be stored in the form of a correspondence table. The multiple entries in the correspondence table have a one-to-one correspondence with the multiple correspondences. It should be understood that the UDR network element may also store the above-mentioned correspondence in other forms besides the correspondence table, for example, it may also store the above-mentioned correspondence in the form of a configuration file. The embodiment of the present application does not specifically limit the storage manner of the correspondence relationship.

The communication methods provided in the embodiments of the present application will be described in detail below for the publishing terminal and the monitoring terminal respectively.

With reference to Figure 4, as shown in Figure 5, for the discovery request initiated by the publishing terminal, such as the first discovery request message, the above S403-S406 can be specifically implemented as S504-S509:

S504: The publishing terminal sends a first discovery request message to the first PCF network element via the first AMF network element. Correspondingly, the first PCF network element receives the first discovery request message from the publishing terminal via the first AMF network element.

Among them, the first discovery request message carries an application identifier, such as APP ID. Optionally, the first discovery request message may also carry one or more of the identification of the publishing terminal (user identification at the application level and/or user identification identifiable by the core network element), discovery mode, and first request indication . Wherein, the first request indication is used to request to publish parameters, such as ProSe discovery key parameters.

Optionally, the first request indication may be explicitly carried in the first discovery request message, such as occupying a 1-bit indication field in the first discovery request message. Or, optionally, the first discovery request message may be a discovery key request message, that is, the message name may be used to implicitly carry the first request indication. Or, optionally, the first discovery request message may be a part of a non-access stratum (non-access stratum, NAS) message. For example, as a part of the container in the NAS message, the publishing terminal sends the container to the first AMF network element, and then the first AMF network element forwards the container to the first PCF network element.

It should be noted that when the discovery mode is restricted mode, the first discovery request message also needs to carry the identification of the discovery mode and the publishing terminal, so that the first PCF network element and UDR network element can determine whether the publishing terminal has the authority to use the corresponding application identifier. Proximity service.

S505: The first PCF network element interacts with the UDM network element to complete the authentication of the publishing terminal.

Exemplarily, the first PCF network element sends an authentication request message to the UDM network element. Among them, the authentication request message may carry the identity of the issuing terminal, the identity of the PLMN where the issuing terminal is located, and so on. Correspondingly, the UDM network element sends an authentication response message to the first PCF network element. Among them, if the authentication is successful, the authentication response message may carry authorization information, and if the authentication fails, the authentication response message may carry an authentication failure indication.

Exemplarily, if the issuing terminal has the authority to use PC5 communication in the PLMN corresponding to the PLMN identity, the UDM network element may send authorization information to the first PCF network element. Otherwise, the UDM network element may send an authentication failure indication to the first PCF network element.

It should be noted that if the first PCF network element has learned that the publishing terminal has the authority to use PC5 communication under the current PLMN, the first PCF network element may not initiate the aforementioned authentication request to the UDM network element. In other words, S505 is an optional step.

If the publishing terminal is successfully authenticated, or the first PCF network element has learned that the publishing terminal has the authority to use PC5 communication under the current PLMN, the following S506-S509 can be continued. If the ProSe network element is integrated in the first PCF network element, S508 can be directly executed.

S506: The first PCF network element sends a first discovery request message to the UDR network element. Correspondingly, the UDR network element receives the first discovery request message from the first PCF network element.

Optionally, when the discovery mode is the restricted mode, when the first PCF network element requests to publish the discovery parameters of the terminal, it also needs to carry the identification of the publishing terminal.

For the specific implementation of the first discovery request message, refer to S504, which will not be repeated here.

S507: The UDR network element sends a first discovery response message to the first PCF network element. Correspondingly, the first PCF network element receives the first discovery response message from the UDR network element.

Among them, the first discovery response message may carry publishing parameters. The publishing parameter corresponds to the application identifier carried in the first discovery request message. Among them, the release parameter may be a ProSe discovery key parameter. Optionally, the first discovery response message may also carry the validity period of the published parameter.

It should be noted that when the discovery mode is the restricted mode, the UDR also needs to publish the terminal identification carried in the first request message and the terminal identification of the terminal authorized to use the proximity service corresponding to the application identification received by the UDR from the AF network element. The identification is matched to verify whether the publishing terminal has the authority to use the proximity service corresponding to the application identification. After passing the verification, the UDR will allocate the publishing parameters for the publishing terminal. Otherwise, the UDR network element feeds back a rejection indication to the first PCF network element to inform the first PCF network element that the identity verification of the publishing terminal has failed, that is, the first discovery response message may carry the rejection indication and may not carry the publishing parameters.

Optionally, the first discovery response message may be a discovery key response message.

In a possible design method, in S506, the first PCF network element may subscribe to the UDR network element a discovery parameter creation, update, or deletion request. The request message carries the application identifier. After the UDR network element receives the discovery parameter creation, update, or deletion request corresponding to the ProSe network element and the application identifier in S506, the UDR network element can send the ProSe network element creation, update, or deletion application to the first PCF network element in S507 The corresponding relationship between the identification and the discovery parameter. Therefore, the first PCF network element does not need to send the request message to the UDR network element every time it receives the first request message, so as to save signaling overhead.

S508: The first PCF network element sends a first discovery response message to the publishing terminal via the first AMF network element. Correspondingly, the publishing terminal receives the first discovery response message from the first PCF network element via the first AMF network element.

Among them, the first discovery response message carries publishing parameters, such as ProSe discovery key parameters. Optionally, the first discovery response message may also carry the validity period of the published parameter. Among them, the release parameter is used to release the ProSe communication request issued by the terminal.

It should be noted that, when the discovery mode is the restricted mode, the content carried in the first discovery response message can refer to S507, which will not be repeated here.

S509: The publishing terminal publishes the ProSe communication request according to the publishing parameters.

Exemplarily, the publishing terminal may apply for air interface resources from the network element of the access network, and broadcast the ProSe communication request message on the air interface resources. Wherein, the ProSe communication request message carries the foregoing publishing parameters.

It should be noted that when the discovery mode is the restricted mode, and when the publishing terminal does not have the authority to use the proximity service corresponding to the application identifier provided by the publishing terminal, the publishing terminal cannot publish the ProSe communication request.

As shown in Figure 5, for the discovery request initiated by the monitoring terminal, such as the second discovery request message, the above S403-S406 can be specifically implemented as S510-S515:

S510: The monitoring terminal sends a second discovery request message to the second PCF network element via the second AMF network element. Correspondingly, the second PCF network element receives the second discovery request message from the listening terminal via the second AMF network element.

Among them, the second discovery request message carries an application identifier, such as APP ID. Optionally, the second discovery request message may also carry one or more of the identification of the monitoring terminal, the discovery mode, and the second request indication. Wherein, the second request indication is used to request monitoring parameters, such as ProSe finding matching parameters.

Optionally, the second request indication may be explicitly carried in the second discovery request message. Or, optionally, the second discovery request message may be a matching parameter discovery request message, that is, the message name may be used to implicitly carry the second request indication.

It should be noted that when the discovery mode is the restricted mode, the second discovery request message also needs to carry the identification of the discovery mode and the monitoring terminal, so that the second PCF network element and the UDR network element can determine whether the monitoring terminal has the authority to use the application identifier. Proximity service.

S511: The second PCF network element interacts with the UDM network element to complete the authentication of the monitoring terminal.

Exemplarily, the second PCF network element sends an authentication request message to the UDM network element. Among them, the authentication request message may carry the identity of the monitoring terminal, the identity of the PLMN where the monitoring terminal is located, and so on. Correspondingly, the UDM network element sends an authentication response message to the second PCF network element. Among them, if the authentication is successful, the authentication response message may carry authorization information, and if the authentication fails, the authentication response message may carry an authentication failure indication.

Exemplarily, if the monitoring terminal has the authority to use PC5 communication in the PLMN corresponding to the PLMN identifier, the UDM network element may send authorization information to the second PCF network element. Otherwise, the UDM network element may send an authentication failure indication to the second PCF network element.

It should be noted that if the second PCF network element has learned that the monitoring terminal has the authority to use PC5 communication under the current PLMN, the second PCF network element may not initiate the aforementioned authentication request to the UDM network element. In other words, S511 is an optional step.

If the monitoring terminal is successfully authenticated, or the second PCF network element has learned that the monitoring terminal has the authority to use PC5 communication under the current PLMN, the following S512-S515 can be continued. If the ProSe network element is integrated in the second PCF network element, S514 can be directly executed.

S512: The second PCF network element sends a second discovery request message to the UDR network element. Correspondingly, the UDR network element receives the second discovery request message from the second PCF network element.

Optionally, when the discovery mode is the restricted mode, the second PCF network element needs to carry the identification of the listening terminal when requesting the discovery parameters of the listening terminal.

For the specific implementation of the second discovery request message, refer to S510, which will not be repeated here.

S513: The UDR network element sends a second discovery response message to the second PCF network element. Correspondingly, the second PCF network element receives the second discovery response message from the UDR network element.

Wherein, the second discovery response message may carry monitoring parameters. The monitoring parameter corresponds to the application identifier carried in the second discovery request message. Among them, the monitoring parameter may be a ProSe discovery matching parameter.

It should be noted that when the discovery mode is the restricted mode, the UDR also needs to first base on the identification of the listening terminal carried in the second request message and the identification of the terminal authorized to use the proximity service corresponding to the application identification received by the UDR from the AF network element. The identification is matched to verify whether the monitoring terminal has the authority to use the proximity service corresponding to the application identification. After the verification is passed, the UDR will allocate monitoring parameters for the monitoring terminal. Otherwise, the UDR network element feeds back a rejection indication to the second PCF network element to inform the second PCF network element that the identity verification of the monitoring terminal has failed, that is, the second discovery response message may carry the rejection indication and may not carry monitoring parameters.

Optionally, the second discovery response message may be a discovery key response message.

In a possible design method, in S512, the second PCF network element may subscribe to the UDR network element a discovery parameter creation, update, or deletion request, and the request message carries the application identifier. After the UDR network element receives the discovery parameter creation, update, or deletion request corresponding to the ProSe network element and the application identifier in S512, the UDR network element can send the ProSe network element creation, update or deletion application to the second PCF network element in S513 The corresponding relationship between the identification and the discovery parameter. Therefore, the second PCF network element does not need to send the request message to the UDR network element every time it receives the second request message, so as to save signaling overhead.

S514: The second PCF network element sends a second discovery response message to the monitoring terminal via the second AMF network element. Correspondingly, the monitoring terminal receives the second discovery response message from the second PCF network element via the second AMF network element.

Wherein, the second discovery response message carries monitoring parameters. Optionally, the second discovery response message may also carry the validity period of the monitoring parameter. Among them, the monitoring parameter is used for the monitoring terminal to monitor other terminals, such as the ProSe communication request issued by the above-mentioned publishing terminal.

Optionally, the second discovery response message may be a discovery matching parameter response message.

It should be noted that, when the discovery mode is the restricted mode, the content carried in the second discovery response message can refer to S513, which will not be repeated here.

S515: The monitoring terminal monitors the ProSe communication request according to the monitoring parameters.

Exemplarily, the monitoring terminal can apply for air interface resources from the access network element to which it accesses, and on the air interface resources, use monitoring parameters to monitor ProSe communication request messages issued by other terminals, such as monitoring the ProSe communication issued by the above-mentioned publishing terminal. request. For example, if it is monitored that the monitoring parameters match the publishing parameters, it is deemed that there is a ProSe service request; otherwise, it is deemed that there is no ProSe service request.

It should be noted that when the discovery mode is the restricted mode, and when the monitoring terminal does not have the permission to use the proximity service corresponding to the application identifier provided by the monitoring terminal, the monitoring terminal cannot listen to ProSe communication requests issued by other terminals.

In addition, the above-mentioned operation steps S510-S515 for the monitoring terminal can be performed after or before the operation steps S504-S509 for the publishing terminal are performed, or they can be performed cross-over within the same period of time, which is not specifically limited in the embodiment of this application. .

Fig. 6 is the second example of the communication method shown in Fig. 4. 4 and 6, the first network element in FIG. 4 may include the first AMF network element and the second AMF network element in FIG. 6, and the second network element in FIG. 4 may be the UDR network element in FIG. 6. , The third network element in FIG. 4 may be the ProSe network element in FIG. 6, and the terminal in FIG. 4 may include the publishing terminal and the listening terminal in FIG. 6.

With reference to Figure 4, as shown in Figure 6, the above S401-S402 can be implemented as the following S601-S603:

S601: The AF network element sends an application identifier to the ProSe network element. Correspondingly, the ProSe network element receives the application identifier from the AF network element.

S602: The ProSe network element establishes/modifies/deletes the correspondence between the application identifier and the discovery parameter.

S603: The ProSe network element sends the corresponding relationship between the application identifier and the discovery parameter to the UDR network element. Correspondingly, the UDR receives and stores the correspondence between the application identifier and the discovery parameter from the ProSe network element.

For the specific implementation of the above S601-S603, please refer to S501-S503 respectively, which will not be repeated here.

The communication method shown in FIG. 6 will be described in detail below for the publishing terminal and the listening terminal respectively.

With reference to Figure 4, as shown in Figure 6, for the discovery request initiated by the publishing terminal, such as the first discovery request message, the above S403-S406 can be specifically implemented as S604-S609:

S604: The publishing terminal sends a first discovery request message to the first AMF network element. Correspondingly, the first AMF network element receives the first discovery request message from the publishing terminal.

Among them, the first discovery request message carries an application identifier, such as APP ID. Optionally, the first discovery request message may also carry one or more of the identity of the publishing terminal, the discovery mode, and the first request indication. Wherein, the first request indication is used to request to publish parameters, such as ProSe discovery key parameters.

Optionally, the first request indication may be explicitly carried in the first discovery request message, such as occupying a 1-bit indication field in the first discovery request message. Or, optionally, the first discovery request message may be a discovery key request message, that is, the message name may be used to implicitly carry the first request indication.

S605: The first AMF network element interacts with the UDM network element to complete the authentication of the publishing terminal.

Exemplarily, the first AMF network element sends an authentication request message to the UDM network element. Among them, the authentication request message may carry the identity of the issuing terminal, the identity of the PLMN where the issuing terminal is located, and so on. Correspondingly, the UDM network element sends an authentication response message to the first AMF network element. Among them, if the authentication is successful, the authentication response message may carry authorization information, and if the authentication fails, the authentication response message may carry an authentication failure indication.

Exemplarily, if the publishing terminal has the authority to use PC5 communication in the PLMN corresponding to the PLMN identity, the UDM network element may send authorization information to the first AMF network element. Otherwise, the UDM network element may send an authentication failure indication to the first AMF network element.

It should be noted that if the first AMF network element has learned that the publishing terminal has the authority to use PC5 communication under the current PLMN, the first PCF network element may not initiate the aforementioned authentication request to the UDM network element. In other words, S605 is an optional step.

If the publishing terminal is successfully authenticated, or the first AMF network element has learned that the publishing terminal has the authority to use PC5 communication under the current PLMN, the following S606-S609 can be continued:

S606: The first AMF network element sends a first discovery request message to the UDR network element. Correspondingly, the UDR network element receives the first discovery request message from the first AMF network element.

For the specific implementation of the first discovery request message, refer to S604, which will not be repeated here.

S607: The UDR network element sends a first discovery response message to the first AMF network element. Correspondingly, the first AMF network element receives the first discovery response message from the UDR network element.

In a possible design method, in S606, the first AMF network element may subscribe to the UDR network element a discovery parameter creation, update, or deletion request, and the request message carries the application identifier. After the UDR network element receives the discovery parameter creation, update, or deletion request corresponding to the ProSe network element and the application identifier in S606, the UDR network element can send the ProSe network element creation, update, or deletion application to the first AMF network element in S607 The corresponding relationship between the identification and the discovery parameter. Therefore, the first AMF network element does not need to send the request message to the UDR network element every time it receives the first request message, so as to save signaling overhead.

S608: The first AMF network element sends a first discovery response message to the publishing terminal. Correspondingly, the issuing terminal receives the first discovery response message from the first AMF network element.

S609: The publishing terminal publishes the ProSe communication request according to the publishing parameters.

With reference to Figure 4, as shown in Figure 6, for the discovery request initiated by the monitoring terminal, such as the second discovery request message, the above S403-S406 can be specifically implemented as S610-S615:

S610: The monitoring terminal sends a second discovery request message to the second AMF network element. Correspondingly, the second AMF network element receives the second discovery request message from the monitoring terminal.

S611: The second AMF network element interacts with the UDM network element to complete the authentication of the monitoring terminal.

Exemplarily, the second AMF network element sends an authentication request message to the UDM network element. Among them, the authentication request message may carry the identity of the monitoring terminal, the identity of the PLMN where the monitoring terminal is located, and so on. Correspondingly, the UDM network element sends an authentication response message to the second AMF network element. Among them, if the authentication is successful, the authentication response message may carry authorization information, and if the authentication fails, the authentication response message may carry an authentication failure indication.

Exemplarily, if the monitoring terminal has the authority to use PC5 communication in the PLMN corresponding to the PLMN identifier, the UDM network element may send authorization information to the second AMF network element. Otherwise, the UDM network element may send an authentication failure indication to the second AMF network element.

It should be noted that if the second AMF network element has learned that the monitoring terminal has the authority to use PC5 communication under the current PLMN, the second AMF network element may not initiate the aforementioned authentication request to the UDM network element. In other words, S611 is an optional step.

If the monitoring terminal is successfully authenticated, or the second AMF network element has learned that the monitoring terminal has the authority to use PC5 communication under the current PLMN, the following S612-S615 can be continued:

S612: The second AMF network element sends a second discovery request message to the UDR network element. Correspondingly, the UDR network element receives the second discovery request message from the second AMF network element.

For the specific implementation of the second discovery request message, refer to S610, which will not be repeated here.

S613: The UDR network element sends a second discovery response message to the second AMF network element. Correspondingly, the second AMF network element receives the second discovery response message from the UDR network element.

In a possible design method, in S612, the second AMF network element may subscribe to the UDR network element a discovery parameter creation, update, or deletion request, and the request message carries the application identifier. After the UDR network element receives the discovery parameter creation, update, or deletion request corresponding to the ProSe network element and the application identifier in S612, the UDR network element can send the ProSe network element creation, update or deletion application to the second AMF network element in S613 The corresponding relationship between the identification and the discovery parameter. Therefore, the second AMF network element does not need to send the request message to the UDR network element every time it receives the second request message, so as to save signaling overhead.

S614: The second AMF network element sends a second discovery response message to the monitoring terminal. Correspondingly, the monitoring terminal receives the second discovery response message from the second AMF network element.

S615: The monitoring terminal monitors the ProSe communication request according to the monitoring parameters.

It should be noted that the above-mentioned operation steps S610-S615 for the monitoring terminal can be executed after or before the operation steps S604-S609 for the publishing terminal are executed, or they can be executed interleaved within the same period of time. This is not the case in the embodiment of this application. Make specific restrictions.

In addition, comparing Fig. 6 and Fig. 5, it can be known that the difference between the communication method shown in Fig. 6 and the communication method shown in Fig. 5 lies in the steps performed by the first PCF network element in the communication method shown in Fig. 5, In the communication method shown in FIG. 6, the first AMF network element executes instead, and in the communication method shown in FIG. 5, there are steps executed by the second PCF network element. In the communication method shown in FIG. 6, the first AMF network element executes. 2. AMF network element execution.

Based on the communication method shown in any one of Figures 4 to 6, the first network element can request the second network element to configure discovery parameters corresponding to the application identifier according to the application identifier provided by the terminal. For example, the second network element can The application identifier provided by the publishing terminal configures the publishing parameters for the publishing terminal, and configures the monitoring parameters for the monitoring terminal according to the same application identifier provided by the monitoring terminal, that is, the publishing parameters and monitoring parameters correspond to the same application identifier, which can solve the publishing parameters and monitoring The problem of parameter mismatch caused by different network element configurations can increase the success rate of the discovery phase, thereby improving the reliability of proximity services.

Further, referring to the communication method shown in any one of Figures 4 to 6, if the second network element, such as the UDR network element, does not have a discovery parameter corresponding to the application identifier provided by the terminal, such as the application identifier corresponding to The proximity service is a newly launched proximity service, or has been adjusted, so the original discovery parameter is no longer applicable to the proximity service, or the corresponding relationship between the application identifier and the discovery parameter has been deleted due to misoperation, etc., can also be executed The communication method shown in any one of Figures 7-9 below. The details are described below.

FIG. 7 is a fourth flowchart of a communication method provided by an embodiment of this application. This communication method can be applied to the communication in the ProSe discovery phase between different network elements shown in Figure 1 or Figure 2, so as to configure discovery parameters for ProSe communication between different terminals, such as configuring publishing parameters for publishing terminals and monitoring terminals Configure monitoring parameters.

The following takes the terminal, and the first network element, the second network element, and the third network element shown in FIG. 1 as examples, to describe the communication method shown in FIG. 7 in detail. As shown in Figure 7, the communication method includes the following S701-S708:

S701: The third network element obtains an application identifier.

S702: The third network element sends the corresponding relationship between the application identifier and the discovery parameter to the second network element. Correspondingly, the second network element receives the correspondence between the application identifier and the discovery parameter from the third network element.

In a possible design method, the communication method shown in FIG. 7 may further include: the third network element sends to the second network element the discovery mode that can be used by the proximity service ProSe corresponding to the application identifier, and/or authorized The identification of the ProSe terminal that uses the ProSe corresponding to the application identification. Correspondingly, the second network element receives from the third network element the discovery mode that can be used by the proximity service ProSe corresponding to the application identification, and/or the identification of the terminal that is authorized to use the proximity service ProSe corresponding to the application identification.

Further, the communication method shown in FIG. 7 may further include: the third network element determines the effective time of the discovery parameter.

S703: The terminal sends an application identifier to the first network element. Correspondingly, the first network element receives the application identifier from the terminal.

In a possible design method, the terminal may include a publishing terminal, and the discovery parameter may include a publishing parameter. Among them, the release parameter is used to release the ProSe communication request of the ProSe from the terminal. Correspondingly, the communication method shown in FIG. 7 may further include: the issuing terminal sends to the first network element one of the discovery mode that can be used by the proximity service ProSe corresponding to the application identifier, the identity of the issuing terminal, or the first request indication Or multiple. Correspondingly, the first network element receives one or more of the discovery mode, the identification of the publishing terminal, and the first request indication from the publishing terminal. Wherein, the first request indication is used to request to publish parameters. For example, the first request instruction may be the following operation instruction: command=annouce.

In another possible design method, the terminal may include a monitoring terminal, and the discovery parameter may include a monitoring parameter. Among them, the monitoring parameter is used for monitoring the terminal to monitor the ProSe communication request of the proximity service. Correspondingly, the communication method shown in FIG. 7 may further include: the monitoring terminal sends to the first network element one of the discovery mode that the ProSe corresponding to the application identifier can use, the identifier of the monitoring terminal, or the second request indication. Or multiple. Correspondingly, the first network element receives one or more of the discovery mode, the identifier of the monitoring terminal, and the second request indication from the monitoring terminal. Wherein, the second request indication is used to request monitoring parameters. For example, the first request instruction may be the following operation instruction: command=monitor.

S704: The first network element sends the application identifier to the second network element. Correspondingly, the second network element receives the application identifier from the first network element.

In a possible design method, the terminal may include a publishing terminal, and the discovery parameter may include a publishing parameter. Among them, the release parameter is used to release the ProSe communication request of the ProSe from the terminal. Correspondingly, the communication method shown in FIG. 7 may further include: the first network element sends to the second network element the discovery mode that can be used by the proximity service ProSe corresponding to the application identifier, publishes the terminal identifier, or the first request indication. One or more. Correspondingly, the second network element receives one or more of the discovery mode, the identification of the issuing terminal, and the first request indication from the first network element. Wherein, the first request indication is used to request to publish parameters.

In another possible design method, the terminal may include a monitoring terminal, and the discovery parameter may include a monitoring parameter. Among them, the monitoring parameter is used for monitoring the terminal to monitor the ProSe communication request of the proximity service. Correspondingly, the communication method shown in FIG. 7 may further include: the first network element sends to the second network element the discovery mode that can be used by the proximity service ProSe corresponding to the application identifier, the identifier of the monitoring terminal, or the second request indication. One or more. Correspondingly, the second network element receives one or more of the discovery mode, the identifier of the monitoring terminal, and the second request indication from the first network element; the second request indication is used for requesting monitoring parameters. Wherein, the second request indication is used to request monitoring parameters.

For the specific implementation of the foregoing S701-S704, reference may be made to the relevant content in the foregoing S401-S404, which will not be repeated here.

S705: The first network element learns that there is no discovery parameter corresponding to the application identifier in the second network element.

Exemplarily, the first network element may learn from the second network element that there is no discovery parameter corresponding to the application identifier in the second network element. For example, if the proximity service corresponding to the application identifier is newly online, offline, or adjusted, and the corresponding discovery parameter has not been updated, there may not be a second network element corresponding to the application identifier Found parameters. At this time, the first network element may also send the application identifier to the third network element, requesting the third network element to configure the corresponding discovery parameters, that is, the following S706-S708 may be performed:

S706: The first network element sends the application identifier to the third network element. Correspondingly, the third network element receives the application identifier from the first network element.

Among them, the discovery parameter corresponds to the application identifier.

In a possible design method, the terminal may include a publishing terminal, and the discovery parameter may include a publishing parameter. Among them, the release parameter is used to release the ProSe communication request of the ProSe from the terminal. Correspondingly, the communication method shown in FIG. 7 may further include: the first network element sends to the third network element the discovery mode that can be used by the proximity service ProSe corresponding to the application identifier, publishes the terminal identifier, or the first request instruction One or more. Correspondingly, the third network element receives one or more of the discovery mode, the identification of the issuing terminal, and the first request indication from the first network element. Wherein, the first request indication is used to request to publish parameters.

In another possible design method, the terminal may include a monitoring terminal, and the discovery parameter may include a monitoring parameter. Among them, the monitoring parameter is used for monitoring the terminal to monitor the ProSe communication request of the proximity service. Correspondingly, the communication method shown in FIG. 7 may further include: the first network element sends to the third network element the discovery mode that can be used by the proximity service ProSe corresponding to the application identifier, the identifier of the monitoring terminal, or the second request indication. One or more. Correspondingly, the third network element receives one or more of the discovery mode, the identifier of the monitoring terminal, and the second request indication from the first network element; the second request indication is used to request monitoring parameters. Wherein, the second request indication is used to request monitoring parameters.

S707: The third network element sends the discovery parameter to the first network element. Correspondingly, the first network element receives the discovery parameter from the third network element.

Wherein, the discovery parameter corresponds to the application identifier, that is, the discovery parameter is generated by the third network element according to the application identifier.

Optionally, the communication method of FIG. 7 may further include: the third network element generates the effective time of the discovery parameter, and sends the effective time of the discovery parameter to the first network element. Correspondingly, the first network element receives and saves the effective time of the discovery parameter from the third network element.

Exemplarily, S707 may be specifically implemented as: the third network element sends a discovery response message (discovery response) to the first network element. Correspondingly, the first network element receives the discovery response message from the third network element. Wherein, the discovery response message carries the discovery parameter corresponding to the application identifier. Among them, the discovery parameters may include publishing parameters or listening parameters. Optionally, the discovery response message may also carry the effective time of the discovery parameter.

Further, the communication method of FIG. 7 may further include: the third network element sends the application identifier, the discovery parameter corresponding to the application identifier, and the effective time to the second network element. Correspondingly, the second network element receives the application identifier, the discovery parameter corresponding to the application identifier, and the effective time from the third network element to update the correspondence between the application identifier and the discovery parameter stored locally in the second network element, such as modifying The corresponding relationship table or configuration file ensures that the corresponding relationship stored by the second network element is synchronized with the proximity service in the current system, so as to increase the success rate of the terminal requesting to find the parameters, thereby further improving the efficiency of the proximity service.

S708: The first network element sends the discovery parameter to the terminal. Correspondingly, the terminal receives the discovery parameter from the first network element.

Among them, the specific implementation of S708 can refer to S406, which will not be repeated here.

In the following, the communication method shown in FIG. 7 will be further explained in conjunction with specific examples.

Fig. 8 is an example one of the communication method shown in Fig. 7. Referring to Figures 7 and 8, the first network element in Figure 7 may include the first PCF network element and the second PCF network element in Figure 8, and the second network element in Figure 7 may be the UDR network element in Figure 8. , The third network element in FIG. 7 may be the ProSe network element in FIG. 8, and the terminal in FIG. 7 may include the publishing terminal and the listening terminal in FIG. 8.

With reference to Figure 7, as shown in Figure 8, the above S701 can be implemented as the following S801-S802:

S801: The AF network element sends an application identifier to the ProSe network element. Correspondingly, the ProSe network element receives the application identifier from the AF network element.

S802: The ProSe network element establishes/modifies/deletes the correspondence between the application identifier and the discovery parameter.

With reference to Figure 7, as shown in Figure 8, the above S702 can be specifically implemented as S803:

S803: The ProSe network element sends the corresponding relationship between the application identifier and the discovery parameter to the UDR network element. Correspondingly, the UDR receives and stores the correspondence between the application identifier and the discovery parameter from the ProSe network element.

For the specific implementation of the foregoing S801-S803, reference may be made to the relevant content in the foregoing S501-S503, which will not be repeated here.

With reference to Figure 7, as shown in Figure 8, for the discovery request initiated by the publishing terminal, such as the first discovery request message, the above S703-S708 can be specifically implemented as S804-S811:

S804: The publishing terminal sends a first discovery request message to the first PCF network element via the first AMF network element. Correspondingly, the first PCF network element receives the first discovery request message from the publishing terminal via the first AMF network element.

S805: The first PCF network element interacts with the UDM network element to complete the authentication of the publishing terminal.

If the publishing terminal is successfully authenticated, or the discovery mode is public mode, or the first PCF network element has learned that the publishing terminal has the right to use the ProSe service corresponding to the application identifier under the current PLMN, the following S806-S809 can be continued:

S806: The first PCF network element sends a first discovery request message to the UDR network element. Correspondingly, the UDR network element receives the first discovery request message from the first PCF network element.

For the specific implementation of S804-S806, please refer to S504-S506, which will not be repeated here.

S807: The UDR network element sends first indication information to the first PCF network element. Correspondingly, the first PCF network element receives the first indication information from the UDR network element.

The first indication information is used to indicate that there is no publishing parameter corresponding to the application identifier provided by the publishing terminal in the second network element.

S808: The first PCF network element sends a first discovery request message to the ProSe network element. Correspondingly, the ProSe network element receives the first discovery request message from the first PCF network element.

For the content of the first discovery request message, refer to S804, which will not be repeated here.

S809: The ProSe network element sends a first discovery response message to the first PCF network element. Correspondingly, the first PCF network element receives the first discovery response message from the ProSe network element.

S810: The first PCF network element sends a first discovery response message to the publishing terminal via the first AMF network element. Correspondingly, the publishing terminal receives the first discovery response message from the first PCF network element via the first AMF network element.

For the content of the first discovery response message, refer to S809, which will not be repeated here.

S811: The publishing terminal publishes the ProSe communication request according to the publishing parameters.

For the specific implementation of S810-S811, please refer to S508-S509, which will not be repeated here.

With reference to Figure 7, as shown in Figure 8, for the discovery request initiated by the listening terminal, such as the second discovery request message, the above S703-S708 can be specifically implemented as S812-S819:

S812: The monitoring terminal sends a second discovery request message to the second PCF network element via the second AMF network element. Correspondingly, the second PCF network element receives the second discovery request message from the listening terminal via the second AMF network element.

Wherein, the second discovery request message carries the application identifier. Optionally, the second discovery request message may also carry one or more of the identification of the monitoring terminal, the discovery mode, and the second request indication. Wherein, the second request indication is used to request monitoring parameters.

S813: The second PCF network element interacts with the UDM network element to complete the authentication of the monitoring terminal.

If the monitoring terminal is successfully authenticated, or the discovery mode is the public mode, or the second PCF network element has learned that the monitoring terminal has the right to use the ProSe service corresponding to the application identifier under the current PLMN, the following S814-S819 can be continued:

S814: The second PCF network element sends a second discovery request message to the UDR network element. Correspondingly, the UDR network element receives the second discovery request message from the second PCF network element.

For the specific implementation of S812-S814, please refer to S510-S512, which will not be repeated here.

S815: The UDR network element sends second indication information to the second PCF network element. Correspondingly, the second PCF network element receives the second indication information from the UDR network element.

The second indication information is used to indicate that there is no monitoring parameter corresponding to the application identifier provided by the monitoring terminal in the second network element.

S816: The second PCF network element sends a second discovery request message to the ProSe network element. Correspondingly, the ProSe network element receives the second discovery request message from the second PCF network element.

For the content of the second discovery request message, refer to S812, which will not be repeated here.

S817: The ProSe network element sends a second discovery response message to the second PCF network element. Correspondingly, the second PCF network element receives the second discovery response message from the ProSe network element.

Wherein, the second discovery response message carries monitoring parameters. Optionally, the second discovery response message may also carry the validity period of the monitoring parameter. Among them, the monitoring parameter is used to monitor the terminal to issue a ProSe communication request.

S818: The second PCF network element sends a second discovery response message to the monitoring terminal. Correspondingly, the monitoring terminal receives the second discovery response message from the second PCF network element.

S819: The monitoring terminal monitors the ProSe communication request according to the monitoring parameters.

For the specific implementation of S818-S819, please refer to S514-S515, which will not be repeated here.

It should be noted that the above-mentioned operation steps S812-S819 for the monitoring terminal can be executed after or before the operation steps S804-S811 for the publishing terminal are executed, or they can be executed interleaved within the same period of time. Make specific restrictions.

Fig. 9 is the second example of the communication method shown in Fig. 7. Referring to Figures 7 and 9, the first network element in Figure 7 may include the first AMF network element and the second AMF network element in Figure 9, and the second network element in Figure 7 may be the UDR network element in Figure 9 , The third network element in FIG. 7 may be the ProSe network element in FIG. 9, and the terminal in FIG. 7 may include the publishing terminal and the monitoring terminal in FIG. 9.

With reference to Figure 7, as shown in Figure 9, the above S701 can be implemented as the following S901-S902:

S901: The AF network element sends an application identifier to the ProSe network element. Correspondingly, the ProSe network element receives the application identifier from the AF network element.

S902: The ProSe network element establishes/modifies/deletes the correspondence between the application identifier and the discovery parameter.

With reference to Figure 7, as shown in Figure 9, the above S702 can be specifically implemented as S903:

S903: The ProSe network element sends the corresponding relationship between the application identifier and the discovery parameter to the UDR network element. Correspondingly, the UDR receives and stores the correspondence between the application identifier and the discovery parameter from the ProSe network element.

For the specific implementation of the foregoing S901-S903, reference may be made to the relevant content in the foregoing S601-S603, which will not be repeated here.

With reference to Figure 7, as shown in Figure 9, for the discovery request initiated by the publishing terminal, such as the first discovery request message, the above S703-S708 can be specifically implemented as S904-S911:

S904: The publishing terminal sends a first discovery request message to the first AMF network element. Correspondingly, the first AMF network element receives the first discovery request message from the publishing terminal.

Wherein, the first discovery request message carries an application identifier. Optionally, the first discovery request message may also carry one or more of the identity of the publishing terminal, the discovery mode, and the first request indication. Wherein, the first request indication is used to request to publish parameters.

S905: The first AMF network element interacts with the UDM network element to complete the authentication of the publishing terminal.

If the publishing terminal is successfully authenticated, or the discovery mode is public mode, or the first AMF network element has learned that the publishing terminal has the right to use the ProSe service corresponding to the application identifier under the current PLMN, the following S906-S909 can be continued:

S906: The first AMF network element sends a first discovery request message to the UDR network element. Correspondingly, the UDR network element receives the first discovery request message from the first AMF network element.

For the specific implementation of S904-S906, refer to S604-S606, which will not be repeated here.

S907: The UDR network element sends first indication information to the first AMF network element. Correspondingly, the first AMF network element receives the first indication information from the UDR network element.

S908: The first AMF network element sends a first discovery request message to the ProSe network element. Correspondingly, the ProSe network element receives the first discovery request message from the first AMF network element.

For the content of the first discovery request message, refer to S904, which will not be repeated here.

S909: The ProSe network element sends a first discovery response message to the first AMF network element. Correspondingly, the first AMF network element receives the first discovery response message from the ProSe network element.

Among them, the first discovery response message carries publishing parameters. Optionally, the first discovery response message may also carry the validity period of the published parameter. Among them, the release parameter is used to release the ProSe communication request issued by the terminal.

S910: The first AMF network element sends a first discovery response message to the publishing terminal. Correspondingly, the issuing terminal receives the first discovery response message from the first AMF network element.

S911: The publishing terminal publishes a ProSe communication request according to the publishing parameters.

For the specific implementation of S910-S911, refer to S608-S609, which will not be repeated here.

With reference to Figure 7, as shown in Figure 9, for the discovery request initiated by the listening terminal, such as the second discovery request message, the above S703-S708 can be specifically implemented as S912-S919:

S912. The monitoring terminal sends a second discovery request message to the second AMF network element. Correspondingly, the second AMF network element receives the second discovery request message from the monitoring terminal.

S913: The second AMF network element interacts with the UDM network element to complete the authentication of the monitoring terminal.

If the monitoring terminal is successfully authenticated, or the discovery mode is public mode, or the second AMF network element has learned that the monitoring terminal has the right to use the ProSe service corresponding to the application identifier under the current PLMN, the following S914-S919 can be continued:

S914: The second AMF network element sends a second discovery request message to the UDR network element. Correspondingly, the UDR network element receives the second discovery request message from the second AMF network element.

For the specific implementation of S912-S914, refer to S610-S612, which will not be repeated here.

S915: The UDR network element sends second indication information to the second AMF network element. Correspondingly, the second AMF network element receives the second indication information from the UDR network element.

S916: The second AMF network element sends a second discovery request message to the ProSe network element. Correspondingly, the ProSe network element receives the second discovery request message from the second AMF network element.

For the content of the second discovery request message, refer to S912, which will not be repeated here.

S917: The ProSe network element sends a second discovery response message to the second AMF network element. Correspondingly, the second AMF network element receives the second discovery response message from the ProSe network element.

S918: The second AMF network element sends a second discovery response message to the monitoring terminal. Correspondingly, the monitoring terminal receives the second discovery response message from the second AMF network element.

S919: The monitoring terminal monitors the ProSe communication request according to the monitoring parameters.

For the specific implementation of S918-S919, please refer to S614-S615, which will not be repeated here.

It should be noted that the above-mentioned operation steps S912-S919 for the monitoring terminal can be executed after or before the operation steps S904-S911 for the publishing terminal are executed, or they can be executed interleaved within the same period of time. This is not the case in the embodiment of this application. Make specific restrictions.

In addition, comparing Fig. 9 and Fig. 8 it can be known that the difference between the communication method shown in Fig. 9 and the communication method shown in Fig. 8 lies in the steps performed by the first PCF network element in the communication method shown in Fig. 8, In the communication method shown in FIG. 9, the first AMF network element executes instead, and in the communication method shown in FIG. 8, there are steps executed by the second PCF network element. In the communication method shown in FIG. 2. AMF network element execution.

Based on the communication method shown in any one of Figures 7-9, the first network element can request the second network element to configure the discovery parameters corresponding to the application identifier according to the application identifier provided by the terminal. The first network element may send the application identifier to the third network element and request the third network element to configure the discovery parameter corresponding to the application identifier. For example, the third network element may provide the discovery parameter corresponding to the application identifier. The application identifier of the application identifier configures the publishing parameters for the publishing terminal, and configures the monitoring parameters for the monitoring terminal according to the same application identifier provided by the monitoring terminal. That is, the publishing parameters and the monitoring parameters correspond to the same application identifier, which can solve the difference between the publishing parameters and the monitoring parameters. The mismatch problem caused by the configuration of the network element can increase the success rate of the discovery phase, thereby improving the reliability of the proximity service.

It should be noted that in the communication method shown in any one of FIGS. 5-6 and 8-9, the publishing terminal and the listening terminal may be located in different PLMNs, or they may be located in the same PLMN. Further, when the publishing terminal and the monitoring terminal are located in the same PLMN, the first AMF network element and the second AMF network element may be the same network element or different network elements. Similarly, in Figure 5 or Figure 8 In the communication method shown, when the publishing terminal and the monitoring terminal are located in the same PLMN, the first PCF network element and the second PCF network element may be the same network element or different network elements. The embodiments of the present application do not specifically limit this.

Furthermore, referring to the correspondences involved in the communication methods shown in any one of FIGS. 4-9, a publishing terminal is used as an example for description. In practical applications, the same application identifier may also correspond to multiple publishing terminals, that is, there may be a situation where multiple publishing terminals simultaneously publish ProSe communication requests of the same application. At this time, for a certain monitoring terminal, it is possible to simultaneously monitor the ProSe communication requests issued by the multiple publishing terminals, and select one of the monitored publishing terminals to establish ProSe communication. Correspondingly, in addition to the above-mentioned corresponding relationship between the application identifier and the discovery parameter, the above-mentioned corresponding relationship may also include the corresponding relationship between the authorized user identifier and the discovery parameter in the application corresponding to the application identifier. It should be understood that when there are multiple issuing terminals, there are also multiple authorized user identities, and the multiple authorized user identities have a one-to-one correspondence with the multiple issuing terminals. The following is a specific description with examples.

Fig. 10 is the third example of the communication method shown in Fig. 4. Referring to FIG. 4, as shown in FIG. 10, the first network element in FIG. 4 may include the first AMF network element and the second AMF network element in FIG. 10, and the second network element in FIG. 4 may be the one in FIG. UDR network element or UDM network element, the third network element in FIG. 4 may be the first ProSe network element in FIG. 10, and the terminal in FIG. 4 may include the publishing terminal and the listening terminal in FIG. Optionally, the third network element in FIG. 4 may also include the second ProSe network element in FIG. 10. The communication method shown in FIG. 10 will be described in detail below in conjunction with the communication method shown in FIG. 6.

As shown in FIG. 10, the communication method may include the following steps:

S1001: The AF network element sends an application identifier and an authorized user identifier in the application corresponding to the application identifier to the UDR network element or UDM network element. Correspondingly, the UDR network element or the UDM network element receives the application identifier from the AF network element, and the authorized user identifier in the application corresponding to the application identifier.

Exemplarily, there may be one or more authorized user identifiers in the application corresponding to the application identifier, and the one or more authorized user identifiers may form a user identifier list. Among them, the authorized user ID can be the account number, user name, etc. that the user logs into the application corresponding to the application ID through the publishing terminal, or the identity of the publishing terminal itself, to distinguish different users in the same application or different publishing terminals .

It should be noted that S1001 is used to provide a correspondence between an application identifier and an authorized user identifier in the application identifier for the UDR network element or UDM network element. It should be understood that this correspondence can also be obtained in other ways, that is, S1001 is an optional step, for example, it can be pre-configured or collected by executing the following S1008, which is not specifically limited in the embodiment of the present application.

Optionally, the AF network element may also send an application identifier and an authorized user identifier in the application corresponding to the application identifier to one or more of the first ProSe network element or the second ProSe network element (if present). Correspondingly, the first ProSe network element or the second ProSe network element (if present) can receive the application identifier from the AF network element, and the authorized user identifier in the application corresponding to the application identifier.

Among them, the AF network element sends the application identifier and the authorized user identifier in the application corresponding to the application identifier to the UDR network element or UDM network element (if it is a third-party AF network element, it needs to be forwarded through the NEF network element). The first ProSe network element may obtain application identification information from the UDR network element or UDM network element through subscription and acquisition, and whether to obtain the authorized user identification in the application corresponding to the application identification is an optional item. The reason is that if the first ProSe network element can also verify whether the user identity is authorized in step S1008, in this case, there is no need to store this information in the first ProSe network element. Similarly, if there is a second ProSe network element, perform the same operation.

The communication method shown in FIG. 10 will be described in detail below for the publishing terminal and the listening terminal respectively.

As shown in Figure 10, for the discovery request initiated by the publishing terminal, such as the first discovery request message, the communication method shown in Figure 10 further includes S1002-S1008:

S1002. The publishing terminal sends a first discovery request message to the first AMF network element. Correspondingly, the first AMF network element receives the first discovery request message from the publishing terminal.

Wherein, the first discovery request message carries an application identifier, such as an APP ID, and a user identifier of the publishing terminal in the application corresponding to the application identifier (application-level user identifier and/or user identifier identifiable by the core network element). Optionally, the first discovery request message may also carry one or more of the discovery mode and the first request indication. Wherein, the first request indication is used to request to publish parameters, such as ProSe discovery key parameters.

Optionally, the first request indication may be explicitly carried in the first discovery request message, such as occupying a 1-bit indication field in the first discovery request message. Or, optionally, the first discovery request message may be a discovery key request message, that is, the message name may be used to implicitly carry the first request indication. Or, optionally, the first discovery request message may be used as a part of a non-access stratum (NAS) message, for example, as a part of a container (container) in the NAS message sent by the publishing terminal to the first AMF network yuan.

For other specific implementations of the discovery mode and the first request indication, please refer to the relevant content in the above S604, which will not be repeated here.

S1003. The first AMF network element sends a first discovery request message to the first ProSe network element. Correspondingly, the first ProSe network element receives the first discovery request message from the first AMF network element.

For the specific implementation of the first discovery request message, refer to S1002, which will not be repeated here.

S1004: The first ProSe network element interacts with the UDR network element or UDM network element to complete the restricted mode verification of the publishing terminal.

Exemplarily, the first ProSe network element may send a restricted mode verification request message to the UDR network element or the UDM network element. Wherein, the restricted mode verification request message may carry the application identification and the user identification of the publishing terminal in the application corresponding to the application identification. Correspondingly, the UDR network element or the UDM network element may send a restricted mode verification response message to the first ProSe network element. The restricted mode verification response message may carry restricted mode verification result indication information, which is used to indicate whether the publishing terminal has the authority to use the application corresponding to the application identifier to perform ProSe communication.

For example, if the user identification of the publishing terminal exists in the authorized user identification list in the application corresponding to the above application identification, it can be deemed that the restricted mode verification is successful, otherwise it is deemed that the restricted mode verification has failed.

It should be noted that if the first ProSe network element has learned that the publishing terminal has the authority to use the application corresponding to the application identifier for ProSe communication, the first ProSe network element may not initiate restricted mode verification to the UDR network element or UDM network element. request. In other words, S1004 is an optional step.

If the publishing terminal restricted mode verification is successful, or the first ProSe network element has learned that the publishing terminal has the authority to use the application corresponding to the application identifier to perform ProSe communication, the following S1005-S1008 can be continued:

S1005: The first ProSe network element sends a first discovery response message to the first AMF network element. Correspondingly, the first AMF network element receives the first discovery response message from the first ProSe network element.

S1006: The first AMF network element sends a first discovery response message to the publishing terminal. Correspondingly, the issuing terminal receives the first discovery response message from the first AMF network element.

Among them, the first discovery response message may carry publishing parameters. Wherein, the release parameter corresponds to the application identifier carried in the first discovery request message, and the release parameter may be a ProSe discovery key parameter.

Optionally, the first discovery response message may also carry the validity period of the published parameter.

S1007: The publishing terminal publishes the ProSe communication request according to the publishing parameters.

S1008: The first ProSe network element sends the application identifier to the UDR network element or the UDM network element, and publishes the correspondence between the user identifier of the terminal in the application corresponding to the application identifier and the publishing parameter. Correspondingly, the UDR network element or the UDM network element receives and stores the application identifier from the first ProSe network element, and publishes the correspondence between the user identifier of the terminal in the application corresponding to the application identifier and the publishing parameter.

Optionally, the corresponding relationship may also include the effective time of the release parameter.

It should be noted that the above S1002-S1008 can be executed repeatedly for multiple publishing terminals to collect application identifiers, and the corresponding relationships between the user identifiers and publishing parameters of the applications corresponding to the application identifiers of the multiple publishing terminals, and Save it in UDR network element or UDM network element for backup.

In addition, S1008 may be executed before executing S1005-S1007, may also be executed after executing S1005-S1007, or may be executed during execution of S1005-S1007, which is not specifically limited in the embodiment of the present application.

As shown in FIG. 10, for the discovery request initiated by the monitoring terminal, such as the second discovery request message, the communication method shown in FIG. 10 may further include S1009-S1017:

S1009. The monitoring terminal sends a second discovery request message to the second AMF network element. Correspondingly, the second AMF network element receives the second discovery request message from the monitoring terminal.

Wherein, the second discovery request message carries the application identifier, the user identifier of the publishing terminal in the application corresponding to the application identifier, and the discovery mode.

Optionally, the second discovery request message may also carry one or more of the user identification of the monitoring terminal in the application corresponding to the application identification or the second request indication. Wherein, the second request indication is used to request monitoring parameters, such as ProSe finding matching parameters.

In a possible design method, when there is a second ProSe network element, the first AMF network element can request monitoring parameters from the UDR network element or UDM network element through the second ProSe network element, that is, the following S1010-S1013 can be performed:

S1010: The second AMF network element sends a second discovery request message to the second ProSe network element. Correspondingly, the second ProSe network element receives the second discovery request message from the second AMF network element.

For the specific implementation of the second discovery request message, refer to S1009, which will not be repeated here.

S1011: The second ProSe network element sends a third discovery request message to the UDR network element or the UDM network element. Correspondingly, the UDR network element or the UDM network element receives the third discovery request message from the second ProSe network element.

Wherein, the third discovery request message carries the application identifier, the user identifier of the publishing terminal in the application corresponding to the application identifier, and the discovery mode.

Optionally, the third discovery request message may also carry one or more of the user identification of the monitoring terminal in the application corresponding to the application identification or the second request indication. Wherein, the second request indication is used to request monitoring parameters, such as ProSe finding matching parameters.

The user ID of the monitoring terminal in the application corresponding to the application ID is used for the interaction between the second ProSe network element and the UDR network element or UDM network element to complete the restricted mode verification of the monitoring terminal, that is, to determine whether the monitoring terminal has authority Use the application corresponding to the application identifier to perform ProSe communication. For specific implementation, please refer to the related content of performing restricted mode verification on the publishing terminal in S1004, which will not be repeated here.

S1012: The UDR network element or the UDM network element sends a third discovery response message to the second ProSe network element. Correspondingly, the second ProSe network element receives the third discovery response message from the UDR network element or the UDM network element.

Wherein, the third discovery response message carries monitoring parameters. Optionally, the third discovery response message may also carry the validity period of the monitoring parameter. Among them, the monitoring parameter is used for the monitoring terminal to monitor other terminals, such as the ProSe communication request issued by the above-mentioned publishing terminal.

Optionally, the third discovery response message may be a discovery matching parameter response message.

S1013: The second ProSe network element sends a second discovery response message to the second AMF network element. Correspondingly, the second AMF network element receives the second discovery response message from the second ProSe network element.

For the content of the second discovery response message, reference may be made to the foregoing third discovery response message, which will not be repeated here. Optionally, the second discovery response message may be a discovery matching parameter response message.

In another possible design method, when there is no second ProSe network element, the first AMF network element can directly request monitoring parameters from the UDR network element or UDM network element, that is, the communication method shown in FIG. 10 may also include S1014-S1015:

S1014: The second AMF network element sends a second discovery request message to the UDR network element or the UDM network element. Correspondingly, the UDR network element or the UDM network element receives the second discovery request message from the second AMF network element.

For the specific content of the second discovery request message, refer to S1009, which will not be repeated here.

S1015. The UDR network element or the UDM network element sends a second discovery response message to the second AMF network element. Correspondingly, the second AMF network element receives the second discovery response message from the UDR network element or the UDM network element.

For the specific implementation of the second discovery response message, refer to S1013, which will not be repeated here.

After the second AMF network element receives the second discovery response message from the second ProSe network element or UDR network element or UDM network element, the following S1016 may be executed.

S1016: The second AMF network element sends a second discovery response message to the monitoring terminal. Correspondingly, the monitoring terminal receives the second discovery response message from the second AMF network element.

S1017: The monitoring terminal monitors the ProSe communication request according to the monitoring parameters.

For the specific implementation of S1016-S1017, please refer to S614-S615, which will not be repeated here.

Furthermore, the discovery parameter generation network element, the first ProSe network element shown in FIG. 10, and the discovery parameter storage network element, the UDR network element or UDM network element shown in FIG. 10 may belong to different Operator. In this case, for the sake of confidentiality of commercial information, the home operator of the discovery parameter generation network element may not be willing to store the generated discovery parameters in the discovery parameter storage network element, and instead adopts the alternative scheme shown in Figure 11 below. That is, the following correspondence relationship is stored in the discovery parameter storage network element: the application identifier, the correspondence relationship between the authorized user identifier in the application corresponding to the application identifier, and the identifier of the first ProSe network element.

FIG. 11 is the third example of the communication method shown in FIG. 7. Referring to FIGS. 7 and 11, the first network element in FIG. 7 may include the first AMF network element and the second AMF network element in FIG. 11, and the second network element in FIG. 7 may be the UDR network element in FIG. 11 Or UDM network element, the third network element in FIG. 7 may be the first ProSe network element in FIG. 11, and the terminal in FIG. 7 may include the publishing terminal and the listening terminal in FIG. Optionally, the third network element in FIG. 7 may also include the second ProSe network element in FIG. 11, and the second ProSe network element and the first ProSe network element belong to a different operator. The communication method shown in FIG. 11 will be described in detail below with reference to FIG. 10.

As shown in FIG. 11, the communication method may include the following steps:

S1101: The AF network element sends an application identifier and an authorized user identifier in the application corresponding to the application identifier to the UDR network element or UDM network element. Correspondingly, the UDR network element or the UDM network element receives the application identifier from the AF network element, and the authorized user identifier in the application corresponding to the application identifier.

For the specific implementation of S1101, please refer to the above S1001 respectively, which will not be repeated here.

The following describes the publishing terminal and the monitoring terminal respectively.

As shown in FIG. 11, for the discovery request initiated by the publishing terminal, such as the first discovery request message, the communication method shown in FIG. 11 may include the following S1102-S1108:

S1102. The publishing terminal sends a first discovery request message to the first AMF network element. Correspondingly, the first AMF network element receives the first discovery request message from the publishing terminal.

S1103: The first AMF network element sends a first discovery request message to the first ProSe network element. Correspondingly, the first ProSe network element receives the first discovery request message from the first AMF network element.

S1104: The first ProSe network element interacts with the UDR network element or the UDM network element to complete the restricted mode verification of the publishing terminal.

S1105: The first ProSe network element sends a first discovery response message to the first AMF network element. Correspondingly, the first AMF network element receives the first discovery response message from the first ProSe network element.

S1106: The first AMF network element sends a first discovery response message to the publishing terminal. Correspondingly, the issuing terminal receives the first discovery response message from the first AMF network element.

S1107: The publishing terminal publishes the ProSe communication request according to the publishing parameters.

For the specific implementation of the above S1102-S1107, please refer to the above S1002-S1007 respectively, which will not be repeated here.

S1108: The first ProSe network element sends the application identifier to the UDR network element or the UDM network element, and publishes the correspondence between the user identifier of the terminal in the application corresponding to the application identifier and the identifier of the first ProSe network element. Correspondingly, the UDR network element or UDM network element receives and stores the application identifier from the first ProSe network element, publishes the correspondence between the user identifier of the terminal in the application corresponding to the application identifier, and the identifier of the first ProSe network element.

That is to say, because the first ProSe network element and the UDR network element or UDM network element do not belong to the same operator, for commercial confidentiality considerations, the first ProSe network element may not store the discovery parameters corresponding to the application identifier in the UDR network element Or in the UDM network element, the identification of the first ProSe network element is stored in the UDR network element or UDM network element. In this way, the second AMF network element or the second ProSe network element may request the discovery parameter from the first ProSe network element after obtaining the identification of the first ProSe network element from the UDR network element or the UDM network element.

It should be noted that the above S1102-S1108 can be repeated for multiple publishing terminals to collect application identifiers. The user identifiers of the multiple publishing terminals in the application corresponding to the application identifier and the identifier of the first ProSe network element Correspondence relationship between, and save in UDR network element or UDM network element for backup.

In addition, S1108 may be executed before execution of S1105-S1107, may also be executed after execution of S1105-S1107, or may be executed during execution of S1105-S1107, which is not specifically limited in the embodiment of the present application.

As shown in FIG. 11, for the discovery request initiated by the monitoring terminal, such as the second discovery request message, the communication method shown in FIG. 11 may further include S1109-S1121:

S1109: The monitoring terminal sends a second discovery request message to the second AMF network element. Correspondingly, the second AMF network element receives the second discovery request message from the monitoring terminal.

For the specific implementation of the above S1109, please refer to the above S1009 respectively, which will not be repeated here.

In a possible design method, when there is a second ProSe network element, the first AMF network element can request the UDR network element or UDM network element for the identification of the first ProSe network element through the second ProSe network element, and receive the first ProSe network element. The discovery parameter requested by the second ProSe network element from the first ProSe network element, that is, the communication method shown in FIG. 11 may also include S1110-S1115:

S1110: The second AMF network element sends a second discovery request message to the second ProSe network element. Correspondingly, the second ProSe network element receives the second discovery request message from the second AMF network element.

For the specific implementation of the second discovery request message, refer to S1109, which will not be repeated here.

S1111: The second ProSe network element sends a fourth discovery request message to the UDR network element or the UDM network element. Correspondingly, the UDR network element or the UDM network element receives the fourth discovery request message from the second ProSe network element.

For the specific implementation of the fourth discovery request message, reference may be made to the third discovery request message in S1011, which will not be repeated here.

S1112: The UDR network element or the UDM network element sends a fourth discovery response message to the second ProSe network element. Correspondingly, the second ProSe network element receives the fourth discovery response message from the UDR network element or the UDM network element.

Refer to S1108, since the first ProSe network element does not store the discovery parameters in the UDR network element or UDM network element, but stores the identification of the first ProSe network element in the UDR network element or UDM network element, the fourth discovery response message The discovery parameter is not carried, but the identity of the first ProSe network element is carried.

S1113: The second ProSe network element sends a second discovery request message to the first ProSe network element. Correspondingly, the first ProSe network element receives the second discovery request message from the second ProSe network element.

S1114: The first ProSe network element sends a second discovery response message to the second ProSe network element. Correspondingly, the second ProSe network element receives the second discovery response message from the first ProSe network element.

S1115: The second ProSe network element sends a second discovery response message to the second AMF network element. Correspondingly, the second AMF network element receives the second discovery response message from the second ProSe network element.

For the content of the second discovery request message, refer to S1013, which will not be repeated here.

In another possible design method, when the second ProSe network element does not exist, the second AMF network element can directly request the UDR network element or UDM network element for the identification of the first ProSe network element, and receive the identification from the first ProSe network element. The discovery parameter requested by the network element, that is, the communication method shown in FIG. 11 may also include S1116-S1119:

S1116: The second AMF network element sends a fourth discovery request message to the UDR network element or the UDM network element. Correspondingly, the UDR network element or the UDM network element receives the fourth discovery request message from the second AMF network element.

For the specific implementation of the fourth discovery request message, refer to S1111, which will not be repeated here.

S1117: The UDR network element or the UDM network element sends a fourth discovery response message to the second AMF network element. Correspondingly, the second AMF network element receives the fourth discovery response message from the UDR network element or the UDM network element.

For the specific implementation of the fourth discovery response message, refer to S1112, which will not be repeated here.

S1118: The second AMF network element sends a second discovery request message to the first ProSe network element. Correspondingly, the first ProSe network element receives the second discovery request message from the second AMF network element.

S1119: The first ProSe network element sends a second discovery response message to the second AMF network element. Correspondingly, the second AMF network element receives the second discovery response message from the first ProSe network element.

For the specific implementation of the second discovery response message, refer to S1114, which will not be repeated here.

After the second AMF network element receives the second discovery response message from the second ProSe network element or UDR network element or UDM network element, the communication method shown in FIG. 11 may further include S1120-S1121.

S1120: The second AMF network element sends a second discovery response message to the monitoring terminal. Correspondingly, the monitoring terminal receives the second discovery response message from the second AMF network element.

S1121: The monitoring terminal monitors the ProSe communication request according to the monitoring parameters.

For the specific implementation of S1120-S1121, please refer to S1016-S1017, which will not be repeated here.

The communication method provided by the embodiment of the present application is described in detail above with reference to FIGS. 3 to 11. The other two communication devices provided by the embodiments of the present application will be described in detail below with reference to FIGS. 12-13.

FIG. 12 is a second structural diagram of a communication device provided by an embodiment of the present application. As shown in FIG. 12, the communication device 1200 includes: a receiving module 1201 and a sending module 1202. For ease of description, FIG. 12 only shows the main components of the communication device.

In a design solution, the communication device 1200 shown in FIG. 12 can be applied to the communication system shown in FIG. 1 or FIG. 2 to implement the communication method shown in any one of FIG. 4 to FIG. 6 or FIG. 10 The function of the first network element in the middle.

Among them, the receiving module 1201 is used to receive the application identifier from the terminal. The sending module 1202 is configured to send the application identifier to the second network element. The receiving module 1201 is further configured to receive the discovery parameter from the second network element; the discovery parameter corresponds to the application identifier. The sending module 1202 is also used to send discovery parameters to the terminal.

In a possible design, the terminal may include a publishing terminal, and the discovery parameter may include a publishing parameter. Among them, the release parameter is used to release the ProSe communication request of the ProSe from the terminal. Correspondingly, the sending module 1202 is further configured to send to the second network element one or more of the available discovery mode of the ProSe corresponding to the application identifier, the identifier of the issuing terminal, or the first request indication. Wherein, the first request indication is used to request to publish parameters.

In another possible design, the terminal may include a monitoring terminal, and the discovery parameter may include a monitoring parameter. Among them, the monitoring parameter is used for monitoring the terminal to monitor the ProSe communication request of the proximity service. Correspondingly, the sending module 1202 is further configured to send to the second network element one or more of the available discovery mode of the ProSe corresponding to the application identifier, the identifier of the listening terminal, or the second request indication. Wherein, the second request indication is used to request monitoring parameters.

Optionally, the receiving module 1201 is further configured to receive the effective time of the discovery parameter from the second network element; and the sending module 1202 is further configured to send the effective time of the discovery parameter to the terminal.

Optionally, the communication device 1200 shown in FIG. 12 may further include a processing module and a storage module (none of which is shown in FIG. 12), and the storage module stores programs or instructions. When the processing module executes the program or instruction, the communication device 1200 shown in FIG. 12 can execute the function of the first network element in the communication method shown in any one of FIG. 4 to FIG. 6 or FIG. 10.

It should be noted that the communication device 1200 shown in FIG. 12 may be a first network element, such as a PCF network element or AMF network element that configures discovery parameters for the terminal, or a chip or chip system set in the first network element. , This application does not limit this.

In addition, the technical effect of the communication device 1200 shown in FIG. 12 may refer to the technical effect of the communication method shown in any one of FIG. 4 to FIG. 6 or FIG. 10, which will not be repeated here.

In another design solution, the communication device 1200 shown in FIG. 12 can also be applied to the communication system shown in FIG. 1 or FIG. The function of the second network element in the communication method.

Wherein, the receiving module 1201 is configured to receive the correspondence between the application identifier and the discovery parameter from the third network element. The receiving module 1201 is further configured to receive an application identifier from the first network element. The sending module 1202 is configured to send discovery parameters to the first network element.

In a possible design, the receiving module 1201 is also configured to receive from a third network element the discovery mode that can be used by the ProSe corresponding to the application identifier, and/or the use of the ProSe corresponding to the application identifier is authorized. The identity of the terminal.

In a possible design, the terminal may include a publishing terminal, and the discovery parameter may include a publishing parameter. Among them, the release parameter is used to release the ProSe communication request of the ProSe from the terminal. Correspondingly, the receiving module 1201 is further configured to receive one or more of the discovery mode, the identification of the issuing terminal, and the first request indication from the first network element. Wherein, the first request indication is used to request to publish parameters.

In another possible design, the terminal may include a monitoring terminal, and the discovery parameter may include a monitoring parameter. Among them, the monitoring parameter is used for monitoring the terminal to monitor the ProSe communication request of the proximity service. Correspondingly, the receiving module 1201 is further configured to receive one or more of the discovery mode, the identification of the monitoring terminal, and the second request indication from the first network element. Wherein, the second request indication is used to request monitoring parameters.

Optionally, the receiving module 1201 is further configured to receive the effective time of the discovery parameter from the third network element; and the sending module 1202 is further configured to send the effective time of the discovery parameter to the first network element.

Optionally, the communication device 1200 shown in FIG. 12 may further include a processing module and a storage module (none of which is shown in FIG. 12), and the storage module stores programs or instructions. When the processing module executes the program or instruction, the communication device 1200 shown in FIG. 12 can execute the communication method shown in any one of FIG. 4 to FIG. 6 or FIG. 10.

It should be noted that the communication device 1200 shown in FIG. 12 may be a second network element, such as a UDR network element that uniformly stores the correspondence between application identifiers and discovery parameters, or a chip or a chip set in the second network element. System, this application does not limit this.

FIG. 13 is a third structural diagram of a communication device provided by an embodiment of this application. As shown in FIG. 13, the communication device 1300 includes: a processing module 1301 and a transceiver module 1302. For ease of description, FIG. 13 only shows the main components of the communication device.

In a design solution, the communication device 1300 shown in FIG. 13 can be applied to the communication system shown in FIG. 1 or FIG. 2 to execute the communication method shown in any one of FIG. 4 to FIG. 6 or FIG. 10 The function of the third network element.

Among them, the processing module 1301 is used to obtain an application identifier. The transceiver module 1302 is configured to send application identification and discovery parameters to the second network element. Among them, the discovery parameter corresponds to the application identifier.

Optionally, the processing module 1301 is further configured to obtain the identification of the terminal that has been authorized to use the ProSe ProSe corresponding to the application identification; and the transceiver module 1302 is also configured to send the identification of the terminal to the second network element.

Optionally, the processing module 1301 is further configured to obtain the discovery mode that can be used by the ProSe corresponding to the application identifier; and the transceiver module 1302 is further configured to send the discovery mode to the second network element.

Further, the processing module 1301 is also used to determine the effective time of the discovery parameter; and the transceiver module 1302 is also used to send the effective time of the discovery parameter to the second network element.

Optionally, the communication device 1300 shown in FIG. 13 may further include a storage module (not shown in FIG. 13), and the storage module stores programs or instructions. When the processing module 1301 executes the program or instruction, the communication device 1300 shown in FIG. 13 can execute the function of the third network element in the communication method shown in any one of FIG. 4 to FIG. 6 or FIG. 10.

It should be noted that the communication device 1300 shown in FIG. 13 may be a third network element, such as a ProSe function network element for generating discovery parameters, or a PCF network element or AF with the function of a ProSe network element. The network element, the NF network element, etc. may also be a chip or a chip system set in the third network element, which is not limited in this application.

For the technical effect of the communication device 1300 shown in FIG. 13, reference may be made to the technical effect of the communication method shown in any one of FIG. 4 to FIG. 6 or FIG. 10, which will not be repeated here.

In another design solution, the communication device 1300 shown in FIG. 13 can also be applied to the communication system shown in FIG. 1 or FIG. The function of the first network element in the communication method.

Among them, the transceiver module 1302 is configured to receive the application identifier from the terminal and send the application identifier to the second network element. The processing module 1301 is configured to learn that there is no discovery parameter corresponding to the application identifier in the second network element. The transceiver module 1302 also has an application identifier sent to the third network element, and the discovery parameter is received from the third network element.

In a possible design, the terminal may include a publishing terminal, and the discovery parameter may include a publishing parameter. Among them, the release parameter is used to release the ProSe communication request of the ProSe from the terminal. Correspondingly, the transceiver module 1302 is further configured to send to the third network element one or more of the available discovery mode of the ProSe corresponding to the application identification, the identification of the issuing terminal, or the first request indication. Wherein, the first request indication is used to request to publish parameters.

In another possible design, the terminal may include a monitoring terminal, and the discovery parameter may include a monitoring parameter. Among them, the monitoring parameter is used for monitoring the terminal to monitor the ProSe communication request of the proximity service. Correspondingly, the transceiver module 1302 is further configured to send to the third network element one or more of the available discovery mode of the proximity service ProSe corresponding to the application identifier, the identifier of the listening terminal, or the second request indication. Wherein, the second request indication is used to request monitoring parameters.

Optionally, the transceiver module 1302 is further configured to receive the effective time of the discovery parameter from the third network element, and send the effective time of the discovery parameter to the terminal.

Optionally, the communication device 1300 shown in FIG. 13 may further include a storage module (not shown in FIG. 13), and the storage module stores programs or instructions. When the processing module 1301 executes the program or instruction, the communication device 1300 shown in FIG. 13 can execute the function of the first network element in the communication method shown in any one of FIGS. 7-9 or 11.

It should be noted that the communication device 1300 shown in FIG. 13 may be a first network element, such as a PCF network element or AMF network element that configures discovery parameters for the terminal, or a chip or chip system set in the first network element. , This application does not limit this.

For the technical effect of the communication device 1300 shown in FIG. 13, reference may be made to the technical effect of the communication method shown in any one of FIG. 7 to FIG. 9 or FIG. 11, which will not be repeated here.

In yet another design solution, the communication device 1300 shown in FIG. 13 can also be applied to the communication system shown in FIG. 1 or FIG. The function of the third network element in the communication method.

Among them, the transceiver module 1302 is configured to receive the application identifier from the first network element. The processing module 1301 is used to determine the discovery parameter corresponding to the application identifier. The transceiver module 1302 is also used to send discovery parameters to the first network element.

In a possible design, the terminal may include a publishing terminal, and the discovery parameter may include a publishing parameter. Among them, the release parameter is used to release the ProSe communication request of the ProSe from the terminal. Correspondingly, the transceiver module 1302 is further configured to receive from the first network element one or more of the discovery mode that can be used by the ProSe corresponding to the application identification, the identification of the issuing terminal, or the first request indication. Wherein, the first request indication is used to request to publish parameters.

In another possible design, the terminal may include a monitoring terminal, and the discovery parameter may include a monitoring parameter. Among them, the monitoring parameter is used for monitoring the terminal to monitor the ProSe communication request of the proximity service. Correspondingly, the transceiver module 1302 is further configured to receive one or more of the available discovery mode of the proximity service ProSe corresponding to the application identifier, the identifier of the monitoring terminal, or the second request indication from the first network element. Wherein, the second request indication is used to request monitoring parameters.

Optionally, the processing module 1301 is also used to determine the effective time of the discovery parameter; and the transceiver module 1302 is also used to send the effective time of the discovery parameter to the first network element.

Optionally, the communication device 1300 shown in FIG. 13 may further include a storage module (not shown in FIG. 13), and the storage module stores programs or instructions. When the processing module 1301 executes the program or instruction, the communication device 1300 shown in FIG. 13 can execute the function of the third network element in the communication method shown in any one of FIGS. 7-9 or 11.

The embodiment of the present application provides a chip system. The chip system includes a processor and an input/output port. The processor is used to implement the processing functions involved in the foregoing method embodiment, and the input/output port is used to implement the transceiver function involved in the foregoing method embodiment.

In a possible design, the chip system further includes a memory, and the memory is used to store program instructions and data that implement the functions involved in the foregoing method embodiments.

The embodiment of the present application provides a communication system. The system includes the aforementioned multiple terminal devices, and multiple core network elements, such as a first network element, a second network element, and a third network element.

The embodiment of the present application provides a computer-readable storage medium, including: the computer-readable storage medium stores computer instructions; when the computer instructions are run on a computer, the computer is caused to execute the communication method described in the foregoing method embodiment .

The embodiment of the present application provides a computer program product containing instructions, including a computer program or instruction, when the computer program or instruction runs on a computer, the computer executes the communication method described in the foregoing method embodiment.

It should be understood that the processor in the embodiment of the present application may be a central processing unit (central processing unit, CPU), and the processor may also be other general-purpose processors, digital signal processors (digital signal processors, DSP), and dedicated integration Circuit (application specific integrated circuit, ASIC), ready-made programmable gate array (field programmable gate array, FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor or the like.

It should also be understood that the memory in the embodiments of the present application may be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. Among them, the non-volatile memory can be read-only memory (ROM), programmable read-only memory (programmable ROM, PROM), erasable programmable read-only memory (erasable PROM, EPROM), and electrically available Erase programmable read-only memory (electrically EPROM, EEPROM) or flash memory. The volatile memory may be random access memory (RAM), which is used as an external cache. By way of exemplary but not restrictive description, many forms of random access memory (RAM) are available, such as static random access memory (static RAM, SRAM), dynamic random access memory (DRAM), and synchronous dynamic random access memory (DRAM). Access memory (synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous connection dynamic random access memory Take memory (synchlink DRAM, SLDRAM) and direct memory bus random access memory (direct rambus RAM, DR RAM).

The foregoing embodiments may be implemented in whole or in part by software, hardware (such as circuits), firmware, or any other combination. When implemented using software, the above-mentioned embodiments may be implemented in the form of a computer program product in whole or in part. The computer program product includes one or more computer instructions or computer programs. When the computer instructions or computer programs are loaded or executed on the computer, the processes or functions described in the embodiments of the present application are generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions may be stored in 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 a website, computer, server, or data center. Transmission to another website, computer, server or data center via wired (such as infrared, wireless, microwave, etc.). The computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server or a data center that includes one or more sets of available media. The usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, and a magnetic tape), an optical medium (for example, a DVD), or a semiconductor medium. The semiconductor medium may be a solid state drive.

It should be understood that the term "and/or" in this text is only an association relationship describing the associated objects, indicating that there can be three types of relationships, for example, A and/or B, which can mean: A alone exists, and both A and B exist. , There are three cases of B alone, where A and B can be singular or plural. In addition, the character "/" in this text generally indicates that the associated objects before and after are in an "or" relationship, but it may also indicate an "and/or" relationship, which can be understood with reference to the context.

In this application, "at least one" refers to one or more, and "multiple" refers to two or more. "The following at least one item (a)" or similar expressions refers to any combination of these items, including any combination of a single item (a) or a plurality of items (a). For example, at least one item (a) of a, b, or c can mean: a, b, c, ab, ac, bc, or abc, where a, b, and c can be single or multiple .

It should be understood that in the various embodiments of the present application, the size of the sequence number of the above-mentioned processes does not mean the order of execution, and the execution order of each process should be determined by its function and internal logic, and should not correspond to the embodiments of the present application. The implementation process constitutes any limitation.

A person of ordinary skill in the art may realize that the units and algorithm steps of the examples described in combination with the embodiments disclosed herein can be implemented by electronic hardware or a combination of computer software and electronic hardware. Whether these functions are executed by hardware or software depends on the specific application and design constraint conditions of the technical solution. Professionals and technicians can use different methods for each specific application to implement the described functions, but such implementation should not be considered beyond the scope of this application.

Those skilled in the art can clearly understand that, for the convenience and conciseness of description, the specific working process of the system, device and unit described above can refer to the corresponding process in the foregoing method embodiment, which will not be repeated here.

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

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

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

If the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium. Based on this understanding, the technical solution of the present application essentially or the part that contributes to the existing technology or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (read-only memory, ROM), random access memory (random access memory, RAM), magnetic disks or optical disks and other media that can store program codes. .

The above are only specific implementations of this application, but the protection scope of this application is not limited to this. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed in this application. Should be covered within the scope of protection of this application. Therefore, the protection scope of this application should be subject to the protection scope of the claims.

Claims

A communication method, characterized in that it comprises:

The first network element receives the application identifier from the terminal;

Sending the application identifier to the second network element by the first network element;

The first network element receives a discovery parameter from the second network element; the discovery parameter corresponds to the application identifier;

The first network element sends the discovery parameter to the terminal.
The communication method according to claim 1, wherein the terminal comprises a publishing terminal, the discovery parameter comprises a publishing parameter, and the publishing parameter is used for the publishing terminal to publish a ProSe communication request of ProSe;

The communication method further includes:

Sending, by the first network element, to the second network element one or more of a discovery mode that can be used by the proximity service ProSe corresponding to the application identifier, the identifier of the publishing terminal, or the first request instruction; The first request indication is used to request the release parameter.
The communication method according to claim 1, wherein the terminal comprises a listening terminal, the discovery parameter comprises a listening parameter, and the listening parameter is used by the listening terminal to monitor a ProSe communication request of a ProSe;

The communication method further includes:

Sending, by the first network element, to the second network element one or more of a discovery mode that can be used by ProSe corresponding to the application identifier, the identifier of the monitoring terminal, or a second request indication; The second request indication is used to request the monitoring parameter.
The communication method according to any one of claims 1-3, wherein the communication method further comprises:

The effective time when the first network element receives the discovery parameter from the second network element;

The first network element sends the effective time of the discovery parameter to the terminal.
A communication method, characterized in that it comprises:

The second network element receives the correspondence between the application identifier and the discovery parameter from the third network element;

The second network element receives the application identifier from the first network element;

The second network element sends the discovery parameter to the first network element.
The communication method according to claim 5, wherein the communication method further comprises:

The second network element receives from the third network element the discovery mode that can be used by the ProSe corresponding to the application identifier, and/or the identifier of the terminal that has been authorized to use the ProSe corresponding to the application identifier .
The communication method according to claim 6, wherein the terminal comprises a publishing terminal, and the discovery parameter comprises a publishing parameter, and the publishing parameter is used by the publishing terminal to publish a ProSe communication request for ProSe;

The communication method further includes:

The second network element receives one or more of the discovery mode, the identification of the publishing terminal, and a first request indication from the first network element; the first request indication is used to request the publication parameter.
The communication method according to claim 6, wherein the terminal comprises a listening terminal, the discovery parameter comprises a listening parameter, and the listening parameter is used for the listening terminal to monitor a ProSe communication request of a ProSe;

The communication method further includes:

The second network element receives one or more of the discovery mode, the identifier of the monitoring terminal, and a second request indication from the first network element; the second request indication is used to request the monitoring parameter.
The communication method according to any one of claims 5-8, wherein the communication method further comprises:

The effective time when the second network element receives the discovery parameter from the third network element;

The second network element sends the effective time of the discovery parameter to the first network element.
A communication method, characterized in that it comprises:

The third network element obtains the application identifier;

The third network element sends the application identifier and discovery parameter to the second network element; the discovery parameter corresponds to the application identifier.
The communication method according to claim 10, wherein the discovery parameters include publishing parameters and monitoring parameters; the publishing parameters are used to publish a terminal to publish a ProSe request, and the monitoring parameters are used to listen to the terminal to listen to the proximity service. ProSe communication request.
The communication method according to claim 10 or 11, wherein the communication method further comprises:

Acquiring, by the third network element, an identifier of a terminal that has been authorized to use the ProSe ProSe corresponding to the application identifier;

The third network element sends the identification of the terminal to the second network element.
The communication method according to any one of claims 10-12, wherein the communication method further comprises:

Acquiring, by the third network element, a discovery mode that can be used by the proximity service ProSe corresponding to the application identifier;

The third network element sends the discovery mode to the second network element.
The communication method according to any one of claims 10-13, wherein the communication method further comprises:

Determining, by the third network element, the effective time of the discovery parameter;

The third network element sends the effective time of the discovery parameter to the second network element.
A communication method, characterized in that it comprises:

The first network element receives the application identifier from the terminal;

Sending the application identifier to the second network element by the first network element;

The first network element learns that there is no discovery parameter corresponding to the application identifier in the second network element, and sends the application identifier to the third network element;

The first network element receives the discovery parameter from the third network element, where the discovery parameter corresponds to the application identifier.
The communication method according to claim 15, wherein the terminal comprises a publishing terminal, and the discovery parameter comprises a publishing parameter, wherein the publishing parameter is used for the publishing terminal to publish a ProSe communication request for ProSe;

The method also includes:

Sending, by the first network element, to the third network element one or more of a discovery mode that can be used by ProSe corresponding to the application identifier, the identifier of the publishing terminal, or the first request indication, Wherein, the first request indication is used to request the release parameters.
The communication method according to claim 15, wherein the terminal comprises a listening terminal, and the discovery parameter comprises a listening parameter, wherein the listening parameter is used for the listening terminal to monitor a ProSe communication request of ProSe;

The method also includes:

Sending, by the first network element, to the third network element one or more of a discovery mode that can be used by ProSe corresponding to the application identifier, the identifier of the monitoring terminal, or a second request indication, Wherein, the second request indication is used to request the monitoring parameter.
The communication method according to any one of claims 15-17, wherein the method further comprises:

The effective time when the first network element receives the discovery parameter from the third network element;

The first network element sends the effective time of the discovery parameter to the terminal.
A communication method, characterized in that it comprises:

The third network element receives the application identifier from the first network element;

Determining, by the third network element, a discovery parameter corresponding to the application identifier;

The third network element sends the discovery parameter to the first network element.
The communication method according to claim 19, wherein the terminal comprises a publishing terminal, and the discovery parameter comprises a publishing parameter, wherein the publishing parameter is used for the publishing terminal to publish a ProSe communication request of ProSe;

The method also includes:

Receiving, by the third network element, from the first network element one or more of a discovery mode that can be used by ProSe corresponding to the application identifier, the identifier of the publishing terminal, or the first request instruction, Wherein, the first request indication is used to request the release parameters.
The communication method according to claim 19, wherein the terminal comprises a listening terminal, and the discovery parameter comprises a listening parameter, wherein the listening parameter is used for the listening terminal to monitor a ProSe communication request of ProSe;

The method also includes:

The third network element receives from the first network element one or more of a discovery mode that can be used by the proximity service ProSe corresponding to the application identifier, the identifier of the monitoring terminal, or a second request indication, Wherein, the second request indication is used to request the monitoring parameter.
The communication method according to any one of claims 19-21, wherein the method further comprises:

Determining, by the third network element, the effective time of the discovery parameter;

The third network element sends the effective time of the discovery parameter to the first network element.
A communication device, characterized by comprising: a receiving module and a sending module; wherein,

The receiving module is used to receive the application identifier from the terminal;

The sending module is configured to send the application identifier to a second network element;

The receiving module is further configured to receive a discovery parameter from the second network element; the discovery parameter corresponds to the application identifier;

The sending module is also used to send the discovery parameter to the terminal.
The communication device according to claim 23, wherein the terminal comprises a publishing terminal, the discovery parameter comprises a publishing parameter, and the publishing parameter is used by the publishing terminal to publish a ProSe communication request for ProSe;

The sending module is further configured to send to the second network element one or more of the discovery mode that the ProSe corresponding to the application identifier can use, the identifier of the publishing terminal, or the first request instruction. Item; The first request indication is used to request the release parameters.
The communication device according to claim 23, wherein the terminal comprises a listening terminal, the discovery parameter comprises a listening parameter, and the listening parameter is used by the listening terminal to monitor a ProSe communication request of a ProSe;

The sending module is further configured to send to the second network element one or more of the discovery mode that can be used by the ProSe ProSe corresponding to the application identifier, the identifier of the monitoring terminal, or the second request indication Item; The second request indication is used to request the monitoring parameters.
The communication device according to any one of claims 23-25, wherein:

The receiving module is further configured to receive the effective time of the discovery parameter from the second network element;

The sending module is further configured to send the effective time of the discovery parameter to the terminal.
A communication device, characterized by comprising: a receiving module and a sending module; wherein,

The receiving module is configured to receive the correspondence between the application identifier and the discovery parameter from the third network element;

The receiving module is further configured to receive the application identifier from the first network element;

The sending module is configured to send the discovery parameter to the first network element.
The communication device according to claim 27, wherein:

The receiving module is further configured to receive, from the third network element, the discovery mode that the ProSe corresponding to the application identifier can use, and/or the terminal authorized to use the ProSe corresponding to the application identifier Of the logo.
The communication device according to claim 28, wherein the terminal comprises a publishing terminal, and the discovery parameter comprises a publishing parameter, and the publishing parameter is used by the publishing terminal to publish a ProSe communication request for ProSe;

The receiving module is further configured to receive one or more of the discovery mode, the identification of the issuing terminal, and a first request indication from the first network element; the first request indication is used to request the Describe the release parameters.
The communication device according to claim 28, wherein the terminal comprises a listening terminal, the discovery parameter comprises a listening parameter, and the listening parameter is used by the listening terminal to monitor a ProSe communication request of ProSe;

The receiving module is further configured to receive one or more of the discovery mode, the identifier of the monitoring terminal, and a second request indication from the first network element; the second request indication is used to request the Describe the monitoring parameters.
The communication device according to any one of claims 27-30, wherein:

The receiving module is further configured to receive the effective time of the discovery parameter from the third network element;

The sending module is further configured to send the effective time of the discovery parameter to the first network element.
A communication device, characterized by comprising: a processing module and a transceiver module; wherein,

The processing module is used to obtain an application identifier;

The transceiver module is configured to send the application identifier and discovery parameter to a second network element; the discovery parameter corresponds to the application identifier.
The communication device according to claim 32, wherein the discovery parameters include publishing parameters and monitoring parameters; the publishing parameters are used to publish a terminal to publish a ProSe request, and the monitoring parameters are used to listen to the terminal to listen to the proximity service ProSe communication request.
The communication device according to claim 32 or 33, wherein:

The processing module is further configured to obtain an identifier of a terminal that has been authorized to use the ProSe ProSe corresponding to the application identifier;

The transceiver module is further configured to send the terminal identifier to the second network element.
The communication device according to any one of claims 32-34, wherein:

The processing module is further configured to obtain a discovery mode that can be used by the proximity service ProSe corresponding to the application identifier;

The transceiver module is further configured to send the discovery mode to the second network element.
The communication device according to any one of claims 32-35, wherein:

The processing module is also used to determine the effective time of the discovery parameter;

The transceiver module is further configured to send the effective time of the discovery parameter to the second network element.
A communication device, characterized by comprising: a processing module and a transceiver module; wherein,

The transceiver module is configured to receive an application identifier from a terminal and send the application identifier to a second network element;

The processing module is configured to learn that there is no discovery parameter corresponding to the application identifier in the second network element;

The transceiver module is further configured to send the application identifier to a third network element and receive the discovery parameter from the third network element, where the discovery parameter corresponds to the application identifier.
The communication device according to claim 37, wherein the terminal comprises a publishing terminal, and the discovery parameter comprises a publishing parameter, wherein the publishing parameter is used for the publishing terminal to publish a ProSe communication request for ProSe;

The transceiver module is further configured to send to the third network element one or more of the discovery mode that can be used by the ProSe corresponding to the application identifier, the identifier of the publishing terminal, or the first request indication Item, wherein the first request indication is used to request the release parameters.
The communication device according to claim 37, wherein the terminal comprises a listening terminal, and the discovery parameter comprises a listening parameter, wherein the listening parameter is used for the listening terminal to monitor a ProSe communication request of ProSe;

The transceiver module is further configured to send to the third network element one or more of the discovery mode that the ProSe corresponding to the application identifier can use, the identifier of the monitoring terminal, or the second request indication. Item, wherein the second request indication is used to request the monitoring parameter.
The communication device according to any one of claims 37-39, wherein:

The transceiver module is further configured to receive the effective time of the discovery parameter from the third network element, and send the effective time of the discovery parameter to the terminal.
A communication device, characterized by comprising: a processing module and a transceiver module; wherein,

The transceiver module is configured to receive an application identifier from a first network element;

The processing module is configured to determine the discovery parameter corresponding to the application identifier;

The transceiver module is further configured to send the discovery parameter to the first network element.
The communication device according to claim 41, wherein the terminal comprises a publishing terminal, and the discovery parameter comprises a publishing parameter, wherein the publishing parameter is used for the publishing terminal to publish a ProSe communication request for ProSe;

The transceiver module is further configured to receive, from the first network element, one or more of the discovery mode that the ProSe corresponding to the application identifier can use, the identifier of the publishing terminal, or the first request indication Item; wherein the first request indication is used to request the release parameters.
The communication device according to claim 41, wherein the terminal comprises a listening terminal, and the discovery parameter comprises a listening parameter, wherein the listening parameter is used for the listening terminal to monitor a ProSe communication request of ProSe;

The transceiver module is further configured to receive from the first network element one or more of the discovery mode that the ProSe corresponding to the application identifier can use, the identifier of the monitoring terminal, or the second request indication Item; wherein the second request indication is used to request the monitoring parameters.
The communication device according to any one of claims 41-43, wherein:

The processing module is also used to determine the effective time of the discovery parameter;

The transceiver module is further configured to send the effective time of the discovery parameter to the first network element.
A communication device, characterized in that, the communication device includes: a processor coupled with a memory;

The memory is used to store a computer program;

The processor is configured to execute the computer program stored in the memory, so that the communication device executes the communication method according to any one of claims 1-22.
A chip system, characterized in that, the chip system includes a processor and an input/output port, the processor is configured to implement the processing function related to any one of claims 1-22, and the input/output port It is used to realize the transceiver function according to any one of claims 1-22.
A computer-readable storage medium, wherein the computer-readable storage medium includes a program or instruction, and when the program or instruction runs on a computer, the computer executes any one of claims 1-22. The communication method described in the item.
A computer program product, characterized in that the computer program product comprises: computer program code, when the computer program code runs on a computer, causes the computer to execute any one of claims 1-22 Communication method.