WO2023213156A1

WO2023213156A1 - Communication method, communication apparatus, and communication system

Info

Publication number: WO2023213156A1
Application number: PCT/CN2023/084296
Authority: WO
Inventors: 丁辉; 时书锋
Original assignee: 华为技术有限公司
Priority date: 2022-05-05
Filing date: 2023-03-28
Publication date: 2023-11-09
Also published as: CN117082527A

Abstract

Provided in the present application are a communication method, a communication apparatus, and a communication system. The method comprises: a terminal device receiving a first URSP rule, a second URSP rule and indication information, the first URSP rule comprising first association information of a target service, the second URSP rule comprising second association information of the target service, and the indication information indicating execution of redundant transmission for the target service; and according to the indication information, matching a first session of the target service on the basis of the first URSP rule, and creating a second session of the target service on the basis of the second URSP rule, the first session and the second session being mutually redundant, and the first association information and the second association information being used for associating the first session and the second session. By means of the solution, redundant sessions of a target service are created when a terminal device determines, on the basis of indication information, that redundant transmission needs to be carried out on data of the target service, rather than creating redundant sessions of the target service in any case, thus helping to reduce the network resource overhead and the device overhead.

Description

Communication method, communication device and communication system

Cross-references to related applications

This application claims priority to the Chinese patent application filed with the China Patent Office on May 5, 2022, with the application number 202210479186.8 and the application name "Communication method, communication device and communication system", the entire content of which is incorporated into this application by reference. middle.

Technical field

The present application relates to the field of wireless communication technology, and in particular to communication methods, communication devices and communication systems.

Background technique

For businesses with high reliability requirements, in order to avoid single points of failure in the transmission process as much as possible, the 3rd generation partnership project (3GPP) defines a redundant protocol data unit (PDU) session mechanism , this mechanism achieves redundant transmission of user plane data between the terminal device and the application server by establishing two mutually independent PDU sessions.

In the upstream direction, the terminal device sends the same upstream message through two mutually redundant PDU sessions. The application server sorts and deduplicates the received upstream messages to achieve reliable transmission of the upstream messages. In the downlink direction, the application server sends the same downlink message through two mutually redundant PDU sessions, and the terminal device sorts and deduplicates the received downlink messages to achieve reliable transmission of downlink messages.

Regarding the above redundant PDU session transmission mechanism, how to reduce network resource overhead and equipment overhead remains to be solved.

Contents of the invention

This application provides a communication method, communication device and communication system to reduce network resource overhead and equipment overhead.

In the first aspect, embodiments of the present application provide a communication method, which can be executed by a terminal device or a module applied in the terminal device. Taking the terminal device executing this method as an example, the terminal device receives a first URSP rule, a second URSP rule and indication information. The first user routing selection policy (UE routing selection policy, URSP) rule includes the first association information of the target service, The second URSP rule includes second association information of the target service, and the indication information indicates performing redundant transmission for the target service; the terminal device matches the first session of the target service based on the first URSP rule according to the indication information. , create a second session of the target service based on the second URSP rule, the first session and the second session are redundant to each other, and the first association information and the second association information are used to associate the first session and the Second session.

The above solution, on the one hand, establishes redundant sessions for the target business, which can improve the accuracy of data transmission and improve communication efficiency. On the other hand, when the terminal device determines that redundant transmission of data of the target service is required based on the received indication information, it will establish a redundant session for the target service instead of establishing a redundant session for the target service under any circumstances. , helping to reduce network resource overhead and equipment (such as terminal equipment, access network equipment, etc.) overhead.

In a possible implementation method, the terminal device receiving the first URSP rule, the second URSP rule and the indication information includes: the terminal device receiving a policy container from the policy control network element, the policy container including the first URSP rule, the second URSP rule and the indication information.

The above solution sends the indication information while sending the first URSP rule and the second URSP rule, instead of sending the indication information through additional messages, which helps to reduce signaling overhead.

In a possible implementation method, the terminal device receiving the first URSP rule, the second URSP rule and the indication information includes: the terminal device receiving a policy container from the policy control network element, the policy container including the first URSP rule and The second URSP rule; the terminal device receives the indication information from the application function network element.

In a possible implementation method, the terminal device matches the first session of the target service based on the first URSP rule, including: the terminal device sends a session modification request message, the session modification request message includes the first association information, the The session modification request message is used to modify the first session, which is used to provide redundant transmission for the target service corresponding to the first URSP rule; the terminal device creates a second session of the target service based on the second URSP rule. The session includes: the terminal device sends a session establishment request message, the session establishment request message includes the second association information, the session establishment request message is used to create the second session, and the second session is used for the second URSP rule The corresponding target service provides redundant transmission.

The above solution modifies the first session that has been established and uses the modified first session as a redundant transmission session, and then only needs to establish another new session as a redundant transmission session, instead of establishing two new sessions. For redundant transmission, it helps reduce the overhead caused by establishing sessions.

In a possible implementation method, the terminal device creates a second session of the target service based on the second URSP rule, including: the terminal device sends a session establishment request message, and the session establishment request message includes the identification information of the first session. and the second associated information, the session establishment request message is used to create the second session, the first session is used to provide redundant transmission for the target service corresponding to the first URSP rule, and the second session is used for the The target service corresponding to the second URSP rule provides redundant transmission.

The above solution uses the already established first session as a redundant transmission session, and then only needs to establish another new session as a redundant transmission session, instead of establishing two new sessions for redundant transmission, which helps to reduce the number of Session overhead.

In a possible implementation method, the terminal device matches the first session of the target service based on the first URSP rule, including: the terminal device sends a first session establishment request message, and the first session establishment request message includes the first session establishment request message. Associated information, the first session establishment request message is used to create the first session, the first session is used to provide redundant transmission for the target service corresponding to the first URSP rule; the terminal device is created based on the second URSP rule The second session of the target service includes: the terminal device sends a second session establishment request message, the second session establishment request message includes the second association information, and the second session establishment request message is used to create the second session, The second session is used to provide redundant transmission for the target service corresponding to the second URSP rule.

In the above solution, two new sessions are established for redundant transmission, which can establish a suitable session for redundant transmission for the target business, which helps to improve the business experience and service quality of the target business.

In the second aspect, embodiments of the present application provide a communication method, which can be executed by a policy control network element or a module applied in the policy control network element. Taking the policy control network element executing this method as an example, the policy control network element obtains the service experience information corresponding to the target service; when the service experience information meets the preset conditions, the policy control network element generates the first URSP rule and the second URSP rule, The first URSP rule includes the first association information of the target service, and the second URSP rule includes the second association information of the target service; the policy control network element sends the first URSP rule and the second URSP rule to the terminal device. , the first URSP rule is used for matching the first session of the target service, the second URSP rule is used for creating the second session of the target service, the first session and the second session are mutually redundant, the first association The information and the second association information are used to associate the first session and the second session.

The above solution, on the one hand, establishes redundant sessions for the target business, which can improve the accuracy of data transmission and improve communication efficiency. On the other hand, when the policy control network element determines that the data of the target service needs to be redundantly transmitted based on the received service experience information corresponding to the target service, it triggers the terminal device to establish a redundant session for the target service, rather than at any time. Establishing redundant sessions for target services in all situations helps reduce network resource overhead and equipment (such as terminal equipment, access network equipment, etc.) overhead.

In a possible implementation method, the service experience information is used to indicate the current service quality of the target service.

In a possible implementation method, the policy control network element sends the first URSP rule and the second URSP rule to the terminal device, including: the policy control network element sends a policy container to the terminal device, and the policy container includes the third URSP rule. one URSP rule and the second URSP rule.

In a possible implementation method, the policy container also includes indication information, where the indication information indicates performing redundant transmission for the target service.

The above solution, by instructing the target service to perform redundant transmission through the instruction information, can accurately trigger the terminal device to perform redundant transmission, which helps to improve the service experience of the target service. Moreover, this method sends the indication information while sending the first URSP rule and the second URSP rule, instead of sending the indication information through additional messages, which helps to reduce signaling overhead.

In a possible implementation method, the policy control network element obtains the service experience information corresponding to the target service, including: the policy control network element sends a request message to the data collection network element, and the request message includes the target (DNN) corresponding to the target service. , S-NSSAI) combination or the identification information of the session under the target (DNN, S-NSSAI) combination. The request message is used to request the service experience information corresponding to the target service; the policy controls the network element to receive data from the data collection network. Yuan’s experience information about this business.

In a possible implementation method, the request message also includes an application identifier, and the application identifier is used to identify the target service.

In a possible implementation method, the business experience information satisfies preset conditions, including at least one of the following:

The packet loss rate in the service experience information is not less than the packet loss rate in the demand parameters of the target service;

The delay in the service experience information is not less than the delay in the demand parameters of the target service;

The jitter in the service experience information is not less than the jitter in the demand parameters of the target service;

The bandwidth in the service experience information is not greater than the bandwidth in the demand parameters of the target service.

The above solution compares the service experience information of the target service with the demand parameters of the target service to determine whether the service experience information of the target service meets the requirements, which helps to accurately determine whether redundant session transmission of the target service needs to be established.

In a possible implementation method, the policy control network element receives the demand parameters of the target service from the application function network element.

The above solution receives the demand parameters of the target service from the application function network element, which can ensure the accuracy of the demand parameters.

In a possible implementation method, the demand parameters of the target service are pre-configured on the policy control network element.

In the above solution, the demand parameters of the target service are pre-configured on the policy control network element, which helps to quickly obtain the demand parameters of the target service.

In a possible implementation method, based on any implementation method of the first aspect or the second aspect, the first association information includes a first redundant sequence number, and the second association information includes a second redundant sequence number; or, The first association information and the second association information include a session pair identifier; or, the first association information includes a first redundant sequence number and a session pair identifier. The second association information includes the second redundant sequence number and the session pair identifier.

In the third aspect, embodiments of the present application provide a communication device, which may be a policy control network element or a chip used for the policy control network element. The device has the function of implementing any implementation method of the above-mentioned first aspect. This function can be implemented by hardware, or it can be implemented by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above functions.

In the fourth aspect, embodiments of the present application provide a communication device. The device may be a policy control network element, or may be a chip used for the policy control network element. The device has the function of implementing any implementation method of the above second aspect. This function can be implemented by hardware, or it can be implemented by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above functions.

In a fifth aspect, embodiments of the present application provide a communication device, including a processor coupled to a memory. The processor is configured to call a program stored in the memory to execute any implementation method in the above first to second aspects. . The memory may be located within the device or external to the device. And the processor can be one or more.

In a sixth aspect, embodiments of the present application provide a communication device, including a processor and a memory; the memory is used to store computer instructions, and when the device is running, the processor executes the computer instructions stored in the memory to cause the device to execute Any implementation method in the above first aspect to the second aspect.

In a seventh aspect, embodiments of the present application provide a communication device, including units or means for executing each step of any implementation method in the above first to second aspects.

In an eighth aspect, embodiments of the present application provide a communication device, including a processor and an interface circuit. The processor is configured to communicate with other devices through the interface circuit and execute any implementation method in the above first to second aspects. The processor includes one or more.

In a ninth aspect, embodiments of the present application further provide a computer-readable storage medium in which instructions are stored, and when run on a communication device, the instructions in the above-mentioned first to second aspects are achieved. Any implementation method is executed.

In a tenth aspect, embodiments of the present application also provide a computer program product. The computer program product includes a computer program or instructions. When the computer program or instructions are run by a communication device, any of the above-mentioned first to second aspects can be realized. The method is executed.

In an eleventh aspect, embodiments of the present application further provide a chip system, including: a processor configured to execute any implementation method in the above first to second aspects.

In a twelfth aspect, embodiments of the present application also provide a communication system. The communication system includes a policy control network element for executing any implementation method of the second aspect, and a policy control network element for sending a target service corresponding to the policy control network element. Network elements collect data on business experience information.

Description of the drawings

Figure 1 is a schematic diagram of a communication system provided by an embodiment of the present application;

Figure 2 is a schematic diagram of the 5G network architecture based on service-based architecture;

Figure 3 is a schematic diagram of the 5G network architecture based on point-to-point interface;

Figure 4 is a schematic flow chart of a communication method provided by an embodiment of the present application;

Figure 5 is a schematic flow chart of a communication method provided by an embodiment of the present application;

Figure 6 is a schematic diagram of a communication device provided by an embodiment of the present application;

Figure 7 is a schematic diagram of a communication device provided by an embodiment of the present application.

Detailed ways

In order to reduce network resource overhead and equipment overhead, as shown in Figure 1, this application provides a communication system. The system includes a policy control network element and a data collection network element. Optionally, the communication system also includes an application function network element. .

The system shown in Figure 1 can be used in the fifth generation (5G) network architecture shown in Figure 2 or Figure 3. Of course, it can also be used in future network architectures, such as the sixth generation (6th generation, 6G). Network architecture, etc., are not limited by this application.

The data collection network element is used to send service experience information corresponding to the target service to the policy control network element; the policy control network element is used to obtain the service experience information; when the service experience information meets the preset conditions, generate the first URSP rule and A second URSP rule, the first URSP rule includes the first association information of the target service, the second URSP rule includes the second association information of the target service; sending the first URSP rule and the second URSP rule to the terminal device , the first URSP rule is used for matching the first session of the target service, the second URSP rule is used for creating the second session of the target service, the first session and the second session are mutually redundant, the The first association information and the second association information are used to associate the first session and the second session.

In a possible implementation method, the policy control network element is configured to send the first URSP rule and the second URSP rule to the terminal device, specifically including: sending a policy container to the terminal device, the policy container including the The first URSP rule and the second URSP rule.

In a possible implementation method, the policy control network element is used to obtain service experience information corresponding to the target service, specifically including: sending a request message to the data collection network element, where the request message includes the target ( DNN, S-NSSAI) combination or the identification information of the session under the target (DNN, S-NSSAI) combination. This request message is used to request the service experience information corresponding to the target service; used to receive data from the data collection network element. This business experience information.

For the interaction between various network elements in the system and the specific execution, please refer to the following method embodiments and will not be described again here. In order to meet the challenges of wireless broadband technology and maintain the leading edge of 3GPP networks, the 3GPP standards group formulated the next generation mobile communication network system (Next Generation System) architecture, called 5G network architecture. This architecture not only supports wireless access technologies defined by the 3GPP standards group (such as long term evolution (LTE) access technology, 5G radio access network (RAN) access technology, etc.) to be connected to the 5G core Core network (CN), and supports the use of non-3GPP (non-3GPP) access technology through non-3GPP interworking function (N3IWF) or next generation packet data gateway (ngPDG) Access to the core network.

Figure 2 is a schematic diagram of the 5G network architecture based on service-based architecture. The 5G network architecture shown in Figure 2 may include access network equipment and core network equipment. The terminal device accesses the data network (DN) through access network equipment and core network equipment. Among them, the core network equipment includes but is not limited to some or all of the following network elements: authentication server function (AUSF) network element (not shown in the figure), unified data management (UDM) network element element, unified data repository (UDR) network element, network repository function (NRF) network element (not shown in the figure), network exposure function (NEF) network element (not shown in the figure) shown), application function (AF) network element, policy control function (PCF) network element, access and mobility management function (AMF) network element, session management function (session management function, SMF) Network element, user plane function (UPF) network element, binding support function (BSF) network element (not shown in the figure).

The terminal equipment can be user equipment (UE), mobile station, mobile terminal equipment, etc. Terminal devices can be widely used in various scenarios, such as device-to-device (D2D), vehicle to everything (V2X) communication, machine-type communication (MTC), and the Internet of Things (internet of things, IOT), virtual reality, augmented reality, industrial control, autonomous driving, telemedicine, smart grid, smart furniture, smart office, smart wear, smart transportation, smart city, etc. Terminal devices can be mobile phones, tablets, computers with wireless transceiver functions, wearable devices, vehicles, urban air vehicles (such as drones, helicopters, etc.), ships, robots, robotic arms, smart home devices, etc.

The access network device may be a wireless access network device or a wired access network device. Among them, wireless access network equipment includes 3GPP access network equipment, untrusted non-3GPP access network equipment and trusted non-3GPP access network equipment. 3GPP access network equipment includes but is not limited to: evolved base stations (evolved NodeB, eNodeB) in LTE, next generation base stations (next generation NodeB, gNB) in 5G mobile communication systems, base stations or completed base stations in future mobile communication systems Modules or units with partial functions, such as centralized units (CU), distributed units (DU), etc. Untrusted non-3GPP access network equipment includes but is not limited to: untrusted non-3GPP access gateway or N3IWF equipment, untrusted wireless local area network (WLAN) access point (access point, AP), switch ,router. Trusted non-3GPP access network equipment includes but is not limited to: trusted non-3GPP access gateways, trusted WLAN APs, switches, and routers. Wired access network equipment includes but is not limited to: wired access gateway, fixed telephone network equipment, switches, and routers.

Access network equipment and terminal equipment can be fixed-position or removable. Access network equipment and terminal equipment can be deployed on land, indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on water; they can also be deployed on aircraft, balloons and satellites in the sky. The embodiments of this application do not limit the application scenarios of access network equipment and terminal equipment.

AMF network elements include functions such as mobility management and access authentication/authorization. In addition, it is also responsible for transmitting user policies between the terminal device and the PCF.

SMF network elements include functions such as session management, control policies issued by PCF network elements, selecting UPF network elements, and allocating Internet Protocol (IP) addresses of terminal devices.

The UPF network element includes functions such as user plane data forwarding, session/flow level-based billing statistics, and bandwidth limitation.

UDM network elements include functions such as execution and management of contract data and user access authorization.

UDR includes access functions for execution contract data, policy data, application data and other types of data.

NEF network element is used to support the opening of capabilities and events.

AF network element transmits the requirements from the application side to the network side, such as QoS requirements or user status event subscriptions. AF can be a third-party functional entity or an application service deployed by an operator, such as IP Multimedia Subsystem (IMS) voice call service. Among them, AF network elements include AF network elements within the core network (that is, the operator's AF network elements) and third-party AF network elements (such as an enterprise's application server).

The PCF network element includes policy control functions such as session and service flow level billing, QoS bandwidth guarantee and mobility management, and terminal device policy decision-making. PCF network elements include access and mobility management policy control function (AM PCF) network elements and session management policy control function (session management PCF, SM PCF) network elements. Among them, the AM PCF network element is used to formulate AM policies and user policies for terminal devices. The AM PCF network element can also be called the policy control network element (PCF for aUE)). The SM PCF network element is used to formulate a session management policy (SM policy) for a session. The SM PCF network element can also be called a policy control network element (PCF for a PDU session) that provides services for the session.

NRF network elements can be used to provide network element discovery functions and provide network element information corresponding to network element types based on requests from other network elements. NRF network elements also provide network element management services, such as network element registration, update, de-registration, network element status subscription and push, etc.

BSF network element can provide BSF service registration/unregistration/update, connection detection with NRF network element, creation of session binding information, acquisition of terminal device information, query of session binding information for duplicate IP addresses, etc.

The AUSF network element is responsible for authenticating users to determine whether users or devices are allowed to access the network.

DN is a network located outside the operator's network. The operator's network can access multiple DNs. A variety of services can be deployed on the DN, which can provide data and/or voice services to terminal devices. For example, DN is a private network of a smart factory. The sensors installed in the workshop of the smart factory can be terminal devices. The control server of the sensor is deployed in the DN, and the control server can provide services for the sensor. The sensor can communicate with the control server, obtain instructions from the control server, and transmit the collected sensor data to the control server according to the instructions. For another example, DN is the internal office network of a company. The mobile phones or computers of employees of the company can be used as terminal devices. The employees' mobile phones or computers can access information and data resources on the company's internal office network.

In Figure 2, Npcf, Nudr, Nudm, Naf, Namf, and Nsmf are the service interfaces provided by the above-mentioned PCF, UDR, UDM, AF, AMF, and SMF respectively, and are used to call corresponding service operations. N1, N2, N3, N4 and N6 are interface serial numbers. The meanings of these interface serial numbers are as follows:

1), N1: The interface between the AMF network element and the terminal device can be used to transmit non-access stratum (NAS) signaling (such as QoS rules from the AMF network element) to the terminal device.

2), N2: The interface between the AMF network element and the access network equipment, which can be used to transmit wireless bearer control information from the core network side to the access network equipment, etc.

3), N3: The interface between the access network equipment and the UPF network element, mainly used to transmit uplink and downlink user plane data between the access network equipment and the UPF network element.

4), N4: The interface between the SMF network element and the UPF network element can be used to transfer information between the control plane and the user plane, including controlling the delivery of user-oriented forwarding rules, QoS rules, traffic statistics rules, etc. Report information on the user interface.

5), N6: The interface between the UPF network element and the DN, used to transmit the uplink and downlink user data flows between the UPF network element and the DN.

Figure 3 is a schematic diagram of the 5G network architecture based on point-to-point interfaces. For the introduction of the functions of the network elements, please refer to the introduction of the functions of the corresponding network elements in Figure 2 and will not be described again. The main difference between Figure 3 and Figure 2 is that the interfaces between the control plane network elements in Figure 2 are service-oriented interfaces, while the interfaces between the control plane network elements in Figure 3 are point-to-point interfaces.

In the architecture shown in Figure 3, the interface names and functions between each network element are as follows:

1), the meaning of N1, N2, N3, N4 and N6 interfaces can refer to the previous description.

2), N5: The interface between the AF network element and the PCF network element, which can be used to deliver application service requests and report network events.

3), N7: The interface between the PCF network element and the SMF network element, which can be used to deliver PDU session granularity and service data flow granularity control policies.

4), N8: The interface between AMF network elements and UDM network elements, which can be used by AMF network elements to obtain access and mobility management-related subscription data and authentication data from UDM network elements, and for AMF to register terminal device mobility with UDM manage Related information, etc.

5), N9: The user plane interface between UPF network elements and UPF network elements, used to transmit uplink and downlink user data flows between UPF network elements.

6), N10: The interface between the SMF network element and the UDM network element, which can be used for the SMF network element to obtain session management-related contract data from the UDM network element, and for the SMF network element to register terminal device session-related information with UDM.

7), N11: The interface between the SMF network element and the AMF network element can be used to transfer PDU session tunnel information between the access network device and the UPF network element, transfer control messages sent to the terminal device, and transfer data sent to the access network device. Wireless resource control information of network-connected devices, etc.

8), N15: The interface between the PCF network element and the AMF network element, which can be used to deliver terminal device policies and access control-related policies.

9), N35: The interface between UDM network element and UDR network element, which can be used by UDM network element to obtain user subscription data information from UDR network element.

10), N36: The interface between PCF network element and UDR network element, which can be used by PCF network element to obtain policy-related contract data and application data-related information from UDR network element.

It can be understood that the above network elements or functions can be network elements in hardware devices, software functions running on dedicated hardware, or virtualization functions instantiated on a platform (for example, a cloud platform). Optionally, the above network element or function can be implemented by one device, or can be implemented by multiple devices together, or can be a functional module in one device, which is not specifically limited in the embodiments of this application.

The policy control network elements and application function network elements in this application can be AM PCF network elements and AF network elements respectively in the 5G system, or they can have the functions of the above AM PCF network elements and AF network elements in future communications such as 6G networks. network element, this application is not limited to this. In the embodiment of this application, AM PCF network element and AF network element are used as an example of the policy control network element and the application function network element respectively for description. Moreover, AM PCF network element and AF network element are abbreviated as AM PCF and AF respectively.

The data collection network element in this application can be a network data analysis function (NWDAF) network element (NWDAF for short), SM PCF network element (SM PCF for short) or other network elements.

Figure 4 is a schematic flowchart of a communication method provided by an embodiment of the present application. Figure 4 takes 5G as an example for illustration.

The method includes the following steps:

Step 401: AM PCF obtains service experience information corresponding to the target service.

The service experience information is used to indicate the current service quality of the target service, and the service experience information includes one or more parameters such as packet loss rate, delay, jitter, or bandwidth. The target service may be an Ultra-Reliable and Low-Latency Communication (uRLLC) service.

Among them, the method for AM PCF to obtain the service experience information corresponding to the target service may be: AM PCF sends a request message to the data collection network element. The request message is used to request the service experience information corresponding to the target service, and then the AM PCF receives data from the data collection network element. Yuan’s business experience information. The request message may be a subscription request message, or may be other messages, which is not limited by this application.

In one implementation method, the request message includes a target (DNN, S-NSSAI) combination corresponding to the target service. Under this target (DNN, S-NSSAI) combination, a session for the target service can be established, and a session for other services can also be established. session. After receiving the request message, NWDAF collects the session data under the target (DNN, S-NSSAI) combination. For example, the session data can be collected from one or more devices in the network management device, UPF, SMF, AF or terminal device. , and then analyze or summarize the collected data to obtain business experience information corresponding to the target business. The business experience information can be It is obtained based on the session data of the target service and/or the session data of other services. Among them, DNN is the abbreviation of data network name, and S-NSSAI is the abbreviation of single network slice selection assistance information. The session described in the embodiment of this application may be a PDU session, an Ethernet session or other sessions, which is not limited by this application.

In another implementation method, the request message includes identification information of the session under the target (DNN, S-NSSAI) combination. The session may include sessions of the target service or sessions of other services. After NWDAF receives the request message, it collects the session data. For example, it can collect the session data from one or more of the network management equipment, UPF, SMF, AF or terminal equipment, and then analyzes or summarizes the collected data to obtain The service experience information corresponding to the target service may be obtained based on the session data of the target service and/or the session data of other services.

In yet another implementation method, the request message includes a target (DNN, S-NSSAI) combination corresponding to the target service and an application identifier, which is used to identify the target service. After receiving the request message, NWDAF collects the session data of the target service under the target (DNN, S-NSSAI) combination, for example, from one or more devices among the network management equipment, UPF, SMF, AF or terminal equipment. Collect session data, and then analyze or summarize the collected data to obtain service experience information corresponding to the target service. The service experience information may be obtained based on session data of the target service.

In another implementation method, the request message includes the identification information of the session under the target (DNN, S-NSSAI) combination and includes an application identifier. The application identifier is used to identify the target service. The session may include the target service. Sessions may also include sessions of other services. After NWDAF receives the request message, it collects session data of the target service. For example, it can collect session data from one or more devices such as network management equipment, UPF, SMF, AF or terminal equipment, and then analyzes the collected data. Or the service experience information corresponding to the target service can be obtained by summarizing. The service experience information can be obtained based on session data of the target service.

Step 402: When the service experience information meets the preset conditions, AM PCF generates the first URSP rule and the second URSP rule.

This step 402 can also be understood as: AM PCF determines that the service experience information meets the preset conditions, and then generates the first URSP rule and the second URSP rule.

In one implementation method, the business experience information satisfies preset conditions, including at least one of the following:

1). The packet loss rate in the business experience information is not less than the packet loss rate in the demand parameters of the target business;

2). The delay in the service experience information is not less than the delay in the demand parameters of the target service;

3). The jitter in the service experience information is not less than the jitter in the demand parameters of the target service;

4). The bandwidth in the service experience information is not greater than the bandwidth in the demand parameters of the target service.

When one or more of the above 1) to 4) are met, it indicates that the current service experience of the target business may not be very good and does not meet the needs of the target business. Therefore, it is necessary to trigger the establishment of redundant sessions to improve service quality and business experience. .

Among them, the demand parameters of the target service can be sent by the AF to the AM PCF, or they can be pre-configured on the AM PCF.

The first URSP rule includes first association information of the target service, and the second URSP rule includes the second association information of the target service.

In an implementation method, the first URSP rule includes first flow description information and first routing description information, and the first routing description information includes the first association information. The second URSP rule includes second flow description information and second routing description information, and the second routing description information includes the second association information. Among them, the first-class description letter The information is different from the second flow description information. Both the first flow description information and the second flow description information can match the target service. The first routing description information and the second routing description information may be partially the same or completely different.

Step 403: AM PCF sends the first URSP rule and the second URSP rule to the terminal device. Correspondingly, the terminal device receives the first URSP rule and the second URSP rule.

In one implementation method, the AM PCF sends a policy container to the terminal device in the terminal device configuration update process (UEConfigurationUpdate). The policy container includes the first URSP rule and the second URSP rule. The policy container can be a UE policy container.

Step 404: The terminal device matches the first session of the target service based on the first URSP rule, and creates a second session of the target service based on the second URSP rule.

Among them, the first session and the second session are redundant to each other, that is, the first session is a redundant session of the second session, the second session is a redundant session of the first session, and both the first session and the second session are used for the target For redundant transmission of services, the first session and the second session are used to transmit the same data of the target service.

The first URSP rule is used for matching the first session of the target service, and the second URSP rule is used for creating the second session of the target service.

The first association information and the second association information are used to associate the first session and the second session. In an implementation method, the first association information includes a first redundancy sequence number (RSN), the second association information includes a second redundancy sequence number, and the first redundancy sequence number is the same as the second redundancy sequence number. The numbers can be the same or different. In yet another implementation method, the first association information and the second association information include the same session pair ID. In yet another implementation method, the first association information includes a first redundant sequence number and a session pair identifier, the second association information includes a second redundant sequence number and a session pair identifier, and the first redundant sequence number is identical to the second redundant sequence number. The remaining sequence numbers may be the same or different, and the first association information and the second association information include the same session pair identifier.

Before step 404, the terminal device also determines that a redundant session needs to be created, and the method for triggering the terminal device to create a redundant session may be any one of the following methods one to three.

Method 1, in the above step 403, AM PCF not only sends the first URSP rule and the second URSP rule in the configuration update process of the terminal device, but also sends instruction information, which indicates that redundant transmission is performed for the target service, or Indicates to establish a redundant session for the target service. The terminal device determines that a redundant session needs to be created based on the indication information.

In one implementation method, the instruction information can be carried in a policy container and sent to the terminal device, that is, the AM PCF sends a policy container to the terminal device. The policy container includes the first URSP rule, the second URSP rule and the instruction information.

Method 2: The terminal device determines that a redundant session needs to be created based on the first association information in the first URSP rule and/or the second association information in the second URSP rule.

For example, the terminal device is pre-configured with configuration information that instructs the terminal device to perform a redundant session establishment or modification process based on the received association information. After receiving the first URSP rule and the second URSP rule, the terminal device can According to the first association information in the first URSP rule and/or the second association information in the second URSP rule, it is determined that a redundant session needs to be created.

Method 3: After step 402, AM PCF also sends instruction information to AF, which indicates to perform redundant transmission for the target service or to establish a redundant session for the target service, and then AF sends instruction information to the terminal device through the user , the instruction information indicates to perform redundant transmission for the target service or to establish a redundant session for the target service. The terminal device determines that a redundant session needs to be created according to the received instruction information.

Among them, the instruction information received by the AF from the AM PCF and the instruction information sent by the AF to the terminal device have the same function, but the implementation method may be the same or different.

After determining that a redundant session needs to be created, the terminal device matches the first session of the target service based on the first URSP rule, and creates a second session of the target service based on the second URSP rule. Different implementation methods are introduced below.

Method A: The terminal device sends a session modification request message. The session modification request message includes first association information. The session modification request message is used to modify the first session. The first session is used to provide redundancy for the target service corresponding to the first URSP rule. remaining transmission. Furthermore, the terminal device sends a session establishment request message, which includes second association information. The session establishment request message is used to create a second session, and the second session is used to provide redundant transmission for the target service corresponding to the second URSP rule. .

Based on this method, the first session of the target service has been created on the terminal device, the terminal device triggers the modification process of the first session, sends the first association information to the SMF through this process, and the SMF sends the first association information to the access network device. And the terminal device triggers the establishment process of the second session, sends the second association information to the SMF through the process, and the SMF sends the second association information to the access network device. The access network device associates the first session and the second session as a redundant session and triggers establishment of a redundant access network link based on the first association information and the second association information. In the above solution, the SMF corresponding to the first session and the SMF corresponding to the second session may be different SMF instances, which is not limited by the present invention.

Method B: The terminal device sends a session establishment request message. The session establishment request message includes the identification information of the first session and the second association information. The session establishment request message is used to create a second session. The first session is used to correspond to the first URSP rule. The target service provides redundant transmission, and the second session is used to provide redundant transmission for the target service corresponding to the second URSP rule.

Based on this method, the first session of the target service has been created on the terminal device, the terminal device triggers the establishment process of the second session, and sends the identification information and the second association information of the first session to the SMF through this process, and the SMF sends it to the access network. The device sends identification information of the first session and second association information. The access network device associates the established first session and the newly established second session as a redundant session according to the identification information and the second association information of the first session and triggers the establishment of the redundant access network link.

Method C: The terminal device sends a first session establishment request message. The first session establishment request message includes first association information. The first session establishment request message is used to create a first session. The first session is used to create a session corresponding to the first URSP rule. The target service provides redundant transmission. The terminal device sends a second session establishment request message. The second session establishment request message includes second association information. The second session establishment request message is used to create a second session. The second session is used to provide target services corresponding to the second URSP rule. Redundant transmission.

Based on this method, the terminal device triggers the establishment process of the first session, sends the first association information to the SMF through the process, and the SMF sends the first association information to the access network device. And, the terminal device triggers the establishment process of the second session, sends the second association information to the SMF through the process, and the SMF sends the second association information to the access network device. The access network device associates the newly established first session and the newly established second session as a redundant session according to the first association information and the second association information and triggers the establishment of the redundant access network link.

The above solution, on the one hand, establishes redundant sessions for the target business, which can improve the accuracy of data transmission and improve communication efficiency. On the other hand, when the AM PCF determines that the data of the target service needs to be redundantly transmitted based on the received service experience information corresponding to the target service, it triggers the terminal device to establish a redundant session for the target service, instead of under any circumstances. Establishing redundant sessions for target services helps reduce network resource overhead and equipment (such as terminal equipment, access network equipment, etc.) overhead.

Figure 5 is a schematic flowchart of a communication method provided by an embodiment of the present application. The embodiment of FIG. 5 is a specific example of the above-mentioned embodiment of FIG. 4. In this embodiment, a PDU session is taken as an example for explanation. The method includes the following steps:

Step 501: AF sends a request message to the AM PCF. The request message includes the identification information of the target service, terminal Equipment identification information and instructions. Correspondingly, AM PCF receives the request message.

The identification information of the target service is used to identify the target service. The target service may be a uRLLC service.

The identification information of the terminal device is used to identify the terminal device, such as SUPI, general public subscription identifier (GPSI) or user group identifier.

The indication information indicates that the redundant PDU session mechanism is dynamically enabled for the target service.

Optionally, the request message also includes demand parameters of the target service, and the demand parameters include one or more of packet loss rate, delay, jitter, or bandwidth. The demand parameters of the target service can be used to assist the AM PCF in deciding whether to trigger the redundant PDU session mechanism.

This step 501 is an optional step.

Step 502: AM PCF senses the PDU session creation event.

For example, AM PCF sends a subscription request message to AMF, SMF, BSF or SM PCF. The subscription request message includes the identification information of the terminal device and the target (DNN, S-NSSAI) combination corresponding to the target service. The subscription request message is used to subscribe. PDU session creation event of the end device under the target (DNN, S-NSSAI) combination.

Among them, under the combination of the target (DNN, S-NSSAI) corresponding to the target service, one or more PDU sessions of the terminal device can be created. The one or more PDU sessions can include PDU sessions corresponding to the target service, and can also include other The PDU session corresponding to the service.

When the terminal device creates a PDU session under the target (DNN, S-NSSAI) combination, the AMF, SMF, BSF or SM PCF notifies the AM PCF: The terminal device creates a PDU under the target (DNN, S-NSSAI) combination. session. The created PDU session may include a PDU session corresponding to the target service or a PDU session corresponding to other services.

This step 502 is an optional step.

Step 503, AM PCF sends a subscription request message to NWDAF. The subscription request message includes the service experience analysis event identifier and the identification information of the terminal device, and also includes the identification information of the target (DNN, S-NSSAI) combination or PDU session. Correspondingly, NWDAF receives the subscription request message.

When step 502 is executed, and in step 502 the AM PCF senses that the terminal device has created a PDU session under the target (DNN, S-NSSAI) combination, then the subscription request message includes the terminal device's connection with the target (DNN, S-NSSAI). ) to combine the identification information of the PDU session created.

When the above step 502 is not performed, or the above step 502 is performed but the AM PCF does not perceive that the terminal device has created a PDU session under the target (DNN, S-NSSAI) combination, the subscription request message includes the target (DNN, S-NSSAI). NSSAI) combination.

Optionally, the subscription request message also includes an application identifier used to identify the target service.

Step 504: NWDAF sends service experience information corresponding to the target service to AM PCF. Correspondingly, AM PCF receives the service experience information corresponding to the target service.

Based on the subscription request message sent by the AM PCF, NWDAF obtains data related to the PDU session from one or more devices among the network management equipment, UPF, SMF, AF or terminal equipment, and then analyzes the obtained data and generates target business correspondence Service experience information, which includes one or more parameters such as packet loss rate, delay, jitter, or bandwidth.

For the specific implementation method of collecting data by NWDAF, please refer to the description of step 401 in the embodiment of FIG. 4, which will not be described again.

Step 505: When the service experience information meets the preset conditions, AM PCF generates the first redundant transmission corresponding URSP rules and second URSP rules, the first URSP rule includes first association information, and the second URSP rule includes second association information.

In the specific implementation, AM PCF determines whether redundant transmission is required based on the demand parameters of the target service and the service experience information corresponding to the target service from NWDAF. If it is determined that redundant transmission is required, AM PCF generates a first URSP rule and a second URSP rule. Among them, the demand parameters of the target service can be obtained through the above step 502, or pre-configured on the AM PCF.

For example, AM PCF determines that redundant transmission is required when one or more of the following conditions are met:

Step 506: AM PCF sends the first URSP rule and the second URSP rule to the terminal device. Correspondingly, the terminal device receives the first URSP rule and the second URSP rule.

In specific implementation, AM PCF can send the first URSP rule and the second URSP rule to the terminal device through the terminal device configuration update process. For example, during the configuration update process, AM PCF sends a Namf_Communication_N1N2MessageTransfer message to the terminal device, which carries the first URSP rule and the second URSP rule.

In a specific implementation, the message sent by AM PCF to the terminal device includes a policy container, and the policy container includes a first URSP rule and a second URSP rule.

Step 507: The terminal device matches the first PDU session of the target service based on the first URSP rule, and creates a second PDU session of the target service based on the second URSP rule.

Before step 507, the terminal device determines that a redundant PDU session needs to be created. The method of triggering the terminal device to create a redundant PDU session may refer to the description in step 404 of Embodiment 4, which will not be described again.

The specific implementation method of the terminal device matching the first PDU session of the target service based on the first URSP rule and creating the second PDU session of the target service based on the second URSP rule can also refer to the description in step 404 of Embodiment 4, and will not be described again. .

The above solution, on the one hand, establishes redundant PDU sessions for target services, which can improve the accuracy of data transmission and improve communication efficiency. On the other hand, when the AM PCF determines that redundant transmission of data of the target service is required based on the received service experience information corresponding to the target service, it triggers the terminal device to establish a redundant PDU session for the target service, instead of in any case Establishing redundant PDU sessions for target services in all scenarios will help reduce network resource overhead and equipment (such as terminal equipment, access network equipment, etc.) overhead.

In the above solution, AM PCF subscribes to NWDAF for service experience information corresponding to the target service. In another implementation method, the AM PCF can also subscribe to the SM PCF for service experience information corresponding to the target service. For example, the AM PCF sends a subscription request message to the SM PCF. The subscription request message includes the identification information of the terminal device, the identification information of the target (DNN, S-NSSAI) combination or PDU session, and optionally also includes the identification information used to identify the target. The application identification of the service, and then the SM PCF is combined according to the target (DNN, S-NSSAI), or based on the identification information of the PDU session, or based on the target (DNN, S-NSSAI) combination and application identification, or based on the identification information of the PDU session and Apply the identifier to collect service experience information corresponding to the target service. The service experience information corresponding to the target service is obtained by the SM PCF based on the PDU session data of the target service and/or the PDU session data of other services. Then the SM PCF sends the service experience information corresponding to the target service to the AM PCF.

It can be understood that, in order to implement the functions in the above embodiments, the AM PCF or terminal device includes corresponding hardware structures and/or software modules to perform each function. Those skilled in the art should easily realize that the units and method steps of each example described in conjunction with the embodiments disclosed in this application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is executed by hardware or computer software driving the hardware depends on the specific application scenarios and design constraints of the technical solution.

Figures 6 and 7 are schematic structural diagrams of possible communication devices provided by embodiments of the present application. These communication devices can be used to implement the functions of AM PCF or terminal equipment in the above method embodiments, and therefore can also achieve the beneficial effects of the above method embodiments. In the embodiment of the present application, the communication device may be an AM PCF or terminal equipment, or may be a module (such as a chip) applied to the AM PCF or terminal equipment.

The communication device 600 shown in FIG. 6 includes a processing unit 610 and a transceiver unit 620. The communication device 600 is used to implement the functions of the AM PCF or terminal equipment in the method embodiment shown in Figure 4 or Figure 5 above.

When the communication device 600 is used to implement the functions of the terminal device in the method embodiment shown in Figure 4 or Figure 5, the transceiver unit 620 is used to receive the first URSP rule, the second URSP rule and the indication information. The first URSP rule includes The first association information of the target service, the second URSP rule includes the second association information of the target service, and the instruction information indicates that redundant transmission is performed for the target service; the processing unit 610 is configured to perform redundant transmission based on the instruction information. A URSP rule matches the first session of the target service, a second session of the target service is created based on the second URSP rule, the first session and the second session are mutually redundant, the first association information and the second session The association information is used to associate the first session and the second session.

When the communication device 600 is used to implement the function of PCF in the method embodiment shown in Figure 4 or Figure 5, the processing unit 610 is used to obtain the service experience information corresponding to the target service; when the service experience information meets the preset conditions, generate a third A URSP rule and a second URSP rule, the first URSP rule includes the first association information of the target service, the second URSP rule includes the second association information of the target service; the transceiver unit 620 is used to send the terminal device the The first URSP rule and the second URSP rule, the first URSP rule is used for matching the first session of the target service, the second URSP rule is used for the creation of the second session of the target service, the first session and The second session is redundant to each other, and the first association information and the second association information are used to associate the first session and the second session.

More detailed descriptions about the above-mentioned processing unit 610 and transceiver unit 620 can be directly obtained by referring to the relevant descriptions in the method embodiments shown in Figure 4 or Figure 5, and will not be described again here.

The communication device 700 shown in FIG. 7 includes a processor 710 and an interface circuit 720. The processor 710 and the interface circuit 720 are coupled to each other. It can be understood that the interface circuit 720 may be a transceiver or an input-output interface. Optionally, the communication device 700 may also include a memory 730 for storing instructions executed by the processor 710 or input data required for the processor 710 to run the instructions or data generated after the processor 710 executes the instructions.

When the communication device 700 is used to implement the method shown in Figure 4 or Figure 5, the processor 710 is used to implement the functions of the above-mentioned processing unit 610, and the interface circuit 720 is used to implement the functions of the above-mentioned transceiver unit 620.

It can be understood that the processor in the embodiment of the present application can be a central processing unit (Central Processing Unit, CPU), or other general-purpose processor, digital signal processor (Digital Signal Processor, DSP), or application specific integrated circuit. (Application Specific Integrated Circuit, ASIC), Field Programmable Gate Array (FPGA) or other programmable logic devices, transistor logic devices, hardware components or any combination thereof. A general-purpose processor can be a microprocessor or any conventional processor.

The method steps in the embodiments of the present application can be implemented by hardware or by a processor executing software instructions. Software instructions can be composed of corresponding software modules, and software modules can be stored in random access memory. access memory, flash memory, read-only memory, programmable read-only memory, erasable programmable read-only memory, electrically erasable programmable read-only memory, register, hard disk, removable hard disk, CD-ROM, or anything known in the art other forms of storage media. An exemplary storage medium is coupled to the processor such that the processor can read information from the storage medium and write information to the storage medium. Of course, the storage medium can also be an integral part of the processor. The processor and storage media may be located in an ASIC. Additionally, the ASIC can be located in the base station or terminal equipment. Of course, the processor and the storage medium may also exist as discrete components in the base station or terminal equipment.

In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented using software, it may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer programs or instructions. When the computer program or instructions are loaded and executed on the computer, the processes or functions described in the embodiments of the present application are executed in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, a base station, a user equipment, or other programmable device. The computer program or instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer program or instructions may be transmitted from a website, computer, A server or data center transmits via wired or wireless means to another website site, computer, server, or data center. 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 data center that integrates one or more available media. The available media may be magnetic media, such as floppy disks, hard disks, and tapes; optical media, such as digital video optical disks; or semiconductor media, such as solid-state hard drives. The computer-readable storage medium may be volatile or nonvolatile storage media, or may include both volatile and nonvolatile types of storage media.

In the various embodiments of this application, if there is no special explanation or logical conflict, the terms and/or descriptions between different embodiments are consistent and can be referenced to each other. The technical features in different embodiments are based on their inherent Logical relationships can be combined to form new embodiments.

In this application, "at least one" refers to one or more, and "plurality" refers to two or more. "And/or" describes the association of associated objects, indicating that there can be three relationships, for example, A and/or B, which can mean: A exists alone, A and B exist simultaneously, and B exists alone, where A, B can be singular or plural. In the text description of this application, the character "/" generally indicates that the related objects before and after are an "or" relationship; in the formula of this application, the character "/" indicates that the related objects before and after are a kind of "division" Relationship.

It can be understood that the various numerical numbers involved in the embodiments of the present application are only for convenience of description and are not used to limit the scope of the embodiments of the present application. The size of the serial numbers of the above processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic.

Claims

A communication method, characterized by including:

The terminal device receives a first user routing policy URSP rule, a second URSP rule and indication information. The first URSP rule includes first association information of the target service, and the second URSP rule includes the second association of the target service. Information, the instruction information indicates performing redundant transmission for the target service;

The terminal device matches the first session of the target service based on the first URSP rule according to the instruction information, and creates a second session of the target service based on the second URSP rule. The first session and The second sessions are mutually redundant, and the first association information and the second association information are used to associate the first session and the second session.
The method of claim 1, wherein the terminal device receives the first URSP rule, the second URSP rule and the indication information, including:

The terminal device receives a policy container from a policy control network element, where the policy container includes the first URSP rule, the second URSP rule and the indication information.
The method of claim 1, wherein the terminal device receives the first URSP rule, the second URSP rule and the indication information, including:

The terminal device receives a policy container from a policy control network element, where the policy container includes the first URSP rule and the second URSP rule;

The terminal device receives the indication information from the application function network element.
The method according to any one of claims 1 to 3, wherein the terminal device matches the first session of the target service based on the first URSP rule, including:

The terminal device sends a session modification request message, the session modification request message includes the first association information, the session modification request message is used to modify the first session, and the first session is used to provide the first session for the first session. The target service corresponding to a URSP rule provides redundant transmission;

The terminal device creates a second session of the target service based on the second URSP rule, including:

The terminal device sends a session establishment request message, the session establishment request message includes the second association information, the session establishment request message is used to create the second session, and the second session is used to provide the third session. The target services corresponding to the two URSP rules provide redundant transmission.
The method according to any one of claims 1 to 3, wherein the terminal device creates a second session of the target service based on the second URSP rule, including:

The terminal device sends a session establishment request message, the session establishment request message includes the identification information of the first session and the second association information, the session establishment request message is used to create the second session, the The first session is used to provide redundant transmission for the target service corresponding to the first URSP rule, and the second session is used to provide redundant transmission for the target service corresponding to the second URSP rule.
The method according to any one of claims 1 to 3, wherein the terminal device matches the first session of the target service based on the first URSP rule, including:

The terminal device sends a first session establishment request message, the first session establishment request message includes the first association information, the first session establishment request message is used to create the first session, the first session Used to provide redundant transmission for the target service corresponding to the first URSP rule;

The terminal device creates a second session of the target service based on the second URSP rule, including:

The terminal device sends a second session establishment request message, the second session establishment request message includes the second association information, the second session establishment request message is used to create the second session, the second session Used to provide redundant transmission for the target service corresponding to the second URSP rule.
The method according to any one of claims 1 to 6, characterized in that,

The first association information includes a first redundant sequence number, and the second association information includes a second redundant sequence number; or,

The first association information and the second association information include session pair identification; or,

The first association information includes a first redundant sequence number and a session pair identifier, and the second association information includes a second redundant sequence number and the session pair identifier.
A communication method, characterized by including:

The policy control network element obtains the service experience information corresponding to the target service;

When the service experience information meets the preset conditions, the policy control network element generates a first user routing policy URSP rule and a second URSP rule, where the first URSP rule includes the first association information of the target service, so The second URSP rule includes second association information of the target service;

The policy control network element sends the first URSP rule and the second URSP rule to the terminal device. The first URSP rule is used for matching the first session of the target service. The second URSP rule is used For the creation of the second session of the target service, the first session and the second session are redundant to each other, and the first association information and the second association information are used to associate the first session and the second session. The second session.
The method of claim 8, wherein the service experience information is used to indicate the current service quality of the target service.
The method according to claim 8 or 9, characterized in that the policy control network element sends the first URSP rule and the second URSP rule to the terminal device, including:

The policy control network element sends a policy container to the terminal device, where the policy container includes the first URSP rule and the second URSP rule.
The method according to claim 10, characterized in that the policy container further includes indication information, the indication information indicating performing redundant transmission for the target service.
The method according to any one of claims 8 to 11, characterized in that the policy control network element obtains service experience information corresponding to the target service, including:

The policy control network element sends a request message to the data collection network element. The request message includes the target (DNN, S-NSSAI) combination corresponding to the target service or the session under the target (DNN, S-NSSAI) combination. The identification information, the request message is used to request the service experience information corresponding to the target service;

The policy control network element receives the service experience information from the data collection network element.
The method of claim 12, wherein the request message further includes an application identifier, and the application identifier is used to identify the target service.
The method according to any one of claims 8 to 13, characterized in that the business experience information satisfies preset conditions, including at least one of the following:

The packet loss rate in the service experience information is not less than the packet loss rate in the demand parameters of the target service;

The delay in the service experience information is not less than the delay in the demand parameters of the target service;

The jitter in the service experience information is not less than the jitter in the demand parameters of the target service;

The bandwidth in the service experience information is not greater than the bandwidth in the demand parameters of the target service.
The method of claim 14, further comprising:

The policy control network element receives the demand parameters of the target service from the application function network element.
The method according to claim 14, characterized in that the demand parameters of the target service are pre-configured on the policy control network element.
The method according to any one of claims 8 to 16, characterized in that,

The first association information includes a first redundant sequence number, and the second association information includes a second redundant sequence number; or,

The first association information and the second association information include session pair identification; or,

The first association information includes a first redundant sequence number and a session pair identifier, and the second association information includes a second redundant sequence number and the session pair identifier.
A communication device, characterized by comprising a module for executing the method according to any one of claims 1 to 7.
A communication device, characterized by comprising a module for executing the method according to any one of claims 8 to 17.
A computer program product, characterized in that the computer program product includes a computer program or instructions that, when the computer program or instructions are run on a processor, cause the processor to execute as claimed in any one of claims 1 to 7 The method described in any one of claims 8 to 17.
A computer-readable storage medium, characterized in that a computer program or instructions are stored in the storage medium. When the computer program or instructions are executed by a communication device, the implementation as described in any one of claims 1 to 7 is achieved. Method, or implement the method according to any one of claims 8 to 17.
A communication system, characterized in that it includes a policy control network element for executing the method according to any one of claims 8 to 17, and a policy control network element for sending service experience information corresponding to a target service to the policy control network element. of data collection network elements.
A communication method, characterized by including:

The data collection network element sends the service experience information corresponding to the target service to the policy control network element;

The policy control network element receives the service experience information corresponding to the target service from the data collection network element;

When the service experience information meets the preset conditions, the policy control network element generates a first user routing policy URSP rule and a second URSP rule, where the first URSP rule includes the first association information of the target service, so The second URSP rule includes second association information of the target service;

The policy control network element sends the first URSP rule and the second URSP rule to the terminal device. The first URSP rule is used for matching the first session of the target service. The second URSP rule is used For the creation of the second session of the target service, the first session and the second session are redundant to each other, and the first association information and the second association information are used to associate the first session and the second session. The second session.
The method of claim 23, wherein the service experience information is used to indicate the current service quality of the target service.
The method of claim 23 or 24, wherein the policy control network element sends the first URSP rule and the second URSP rule to the terminal device, including:

The policy control network element sends a policy container to the terminal device, where the policy container includes the first URSP rule and the second URSP rule.