WO2021163901A1

WO2021163901A1 - Session processing method and apparatus therefor

Info

Publication number: WO2021163901A1
Application number: PCT/CN2020/075774
Authority: WO
Inventors: 余芳; 孙海洋; 倪慧
Original assignee: 华为技术有限公司
Priority date: 2020-02-18
Filing date: 2020-02-18
Publication date: 2021-08-26

Abstract

Disclosed are a session processing method and an apparatus therefor. The method comprises: a terminal device determining to transmit first service information by means of a first port of a TSN conversion device; determining a URSP rule according to a URSP received from a policy control network element; and determining a first PDU session according to the URSP rule, wherein the first PDU session is used for transmitting the first service information, the first PDU session is different from a PDU session which is used for transmitting second service information, the second service information is transmitted by means of a second port, and the second port has a topological connection relationship with the terminal device. By means of implementation of the embodiments of the present application, a suitable PDU session can be selected for transmitting service information.

Description

Method and device for processing session

Technical field

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

Background technique

Time-sensitive network (TSN) can guarantee the reliability of delay-sensitive service transmission. The TSN conversion device can enable the 3rd generation partnership project (3rd generation partnership project, 3GPP) network to communicate with the TSN network, that is, the TSN conversion device can enable the service information of the TSN network to be transmitted in the 3GPP network.

How to select a protocol data unit (PDU) session for transmitting service information of a TSN network in a 3GPP network is a technical problem to be solved urgently.

Summary of the invention

The embodiments of the present application provide a session processing method and device, which can select a suitable PDU session for transmitting service information.

In a first aspect, an embodiment of the present application provides a session processing method, the method includes: a terminal device determines to transmit first service information through a first port of a TSN conversion device; and determines a URSP rule according to a URSP received from a policy control network element; And determine the first PDU session according to the URSP rule, the first PDU session is used to transmit the first service information; the first PDU session is different from the PDU session used to transmit the second service information, and the second service information passes through the second port Transmission; the second port has a topological connection with the terminal device.

In this technical solution, it is possible to make the service information received by the terminal device transmitted through different ports have different corresponding PDU sessions, that is, it is possible to prevent the PDU sessions from being shared between different ports. Therefore, in this way, it is beneficial to select a suitable PDU session for the transmission of service information.

In an implementation manner, the URSP rule includes a flow descriptor and a routing descriptor corresponding to the flow descriptor. The specific implementation manner for the terminal device to determine the first PDU session according to the URSP rule may be: if the flow descriptor is If the first port matches, the first PDU session is determined according to the routing descriptor and the attribute information of the established session.

In this technical solution, the terminal device determines the first PDU session according to the routing descriptor and the attribute information of the established session, which facilitates the determination of the first PDU session from the established sessions, that is, the first PDU session can be reused. In this way, new PDU sessions can be avoided, which is conducive to saving resources.

In an implementation manner, the routing descriptors corresponding to different traffic descriptors are different; the specific implementation manner for the terminal device to determine the first PDU session according to the routing descriptor and the attribute information of the established session may be: Determine the first PDU session in which the attribute information matches the routing descriptor.

In an implementation manner, the flow descriptor includes identification information of the port; the matching of the flow descriptor with the first port may include: the identification information of the aforementioned port is the same as the identification information of the first port.

In an implementation manner, the foregoing routing descriptor includes one or more of the following: S-NSSAI, DNN, and identification information of the foregoing port.

In an implementation manner, the flow descriptor may include identification information of the TSN terminal device; the matching of the foregoing flow descriptor with the first port may include: the identification information of the TSN terminal device is the same as the identification information of the first TSN terminal device; Wherein, the first TSN terminal device has a topological connection relationship with the first port.

In an implementation manner, the routing descriptor includes one or more of the following: S-NSSAI, DNN, and identification information of the aforementioned TSN terminal device.

In an implementation manner, a specific implementation manner for the terminal device to determine the first PDU session according to the routing descriptor and the attribute information of the established session may be: determining that the attribute information matches the routing descriptor in the established session Obtain the identification information of the port corresponding to the second PDU session; if the identification information of the port corresponding to the second PDU session is the same as the identification information of the first port, the second PDU session is regarded as the first PDU Conversation.

In this technical solution, the identification information of the port corresponding to the second PDU session is the same as the identification information of the first port, which can indicate that the service information 1 transmitted by the second PDU session can be transmitted to the first TSN conversion device through the first port , Or, the service information 1 transmitted in the second PDU session may be transmitted to the first TSN terminal device connected to the first TSN conversion device through the first port, or the service information 1 transmitted in the second PDU session may be transmitted through the first port The port is transmitted to the next hop TSN device of the first TSN conversion device. Therefore, the service information 1 and the first service information are transmitted through the same port (ie, the first port). Service information transmitted through the same port can share the same PDU session. Therefore, the terminal device can use the second PDU session as the first PDU session. In this way, new service information (first service information) can be transmitted through the second PDU session, and by reusing the second PDU session, it is beneficial to save resources.

In an implementation manner, a specific implementation manner for the terminal device to determine the first PDU session according to the routing descriptor and the attribute information of the established session may be: determining that the attribute information matches the routing descriptor in the established session Obtain the identification information of the port corresponding to the second PDU session; if the identification information of the port corresponding to the second PDU session is different from the identification information of the first port, send the first PDU to the session management network element A session establishment request, the first PDU session establishment request is used to request the establishment of a first PDU session; and a first PDU session establishment response message from the session management network element is received, and the first PDU session establishment response message is used to indicate the first PDU The session was established successfully.

In this technical solution, when the identification information of the port corresponding to the second PDU session is different from the identification information of the first port, that is, when the terminal device cannot determine the first PDU session from the established session, the terminal device can pass the session The management network element sends a first PDU session establishment request to request a new first PDU session.

In an implementation manner, the method may further include: the terminal device storing the correspondence between the first PDU session and the identification information of the first port.

In an implementation manner, a specific implementation manner for the terminal device to determine the first PDU session according to the routing descriptor and the attribute information of the established session may be: determining that the attribute information matches the foregoing routing descriptor in the established session The third PDU session; obtain the identification information of the TSN terminal device corresponding to the third PDU session; if the identification information of the TSN terminal device corresponding to the third PDU session is the same as the identification information of the first TSN terminal device, the third The PDU session is regarded as the first PDU session; wherein, the first TSN terminal device has a topological connection relationship with the first port.

In this technical solution, when the identification information of the TSN terminal device corresponding to the third PDU session is the same as the identification information of the first TSN terminal device, new service information (first service information) can be transmitted through the third PDU session. ), by reusing the third PDU session, it is helpful to save resources.

In an implementation manner, a specific implementation manner for the terminal device to determine the first PDU session according to the routing descriptor and the attribute information of the established session may be: determining that the attribute information matches the foregoing routing descriptor in the established session The third PDU session; to obtain the identification information of the TSN terminal device corresponding to the third PDU session; if the identification information of the TSN terminal device corresponding to the third PDU session is different from the identification information of the first TSN terminal device, report to the session management The network element sends a second PDU session establishment request, and the second PDU session establishment request is used to request the establishment of the first PDU session; wherein, the first TSN terminal device has a topological connection relationship with the first port; and receives information from the session management network element A second PDU session establishment response message, where the second PDU session establishment response message is used to indicate that the first PDU session is successfully established.

In this technical solution, when the identification information of the TSN terminal device corresponding to the third PDU session is different from the identification information of the first TSN terminal device, that is, the terminal device cannot determine the first PDU session from the established session, the terminal device The second PDU session establishment request may be sent to the session management network element to request the establishment of the first PDU session.

In an implementation manner, the method may further include: the terminal device storing the correspondence between the first PDU session and the identification information of the first TSN terminal device.

In an implementation manner, the specific implementation manner for the terminal device to determine the first PDU session according to the routing descriptor and the attribute information of the established session may be: if there is no attribute information in the established session that is consistent with the foregoing routing descriptor For a matching session, a third PDU session establishment request is sent to the session management network element. The third PDU session establishment request is used to request the establishment of the first PDU session. The third PDU session establishment request includes the routing descriptor; The third PDU session establishment response message of the management network element, the third PDU session establishment response message includes the routing descriptor, and the third PDU session establishment response message is used to indicate that the first PDU session is successfully established; wherein, the routing description The identifier includes the identification information of the port or the identification information of the TSN terminal device.

In this technical solution, when there is no session whose attribute information matches the routing descriptor in the established session, the terminal device cannot determine the first PDU session from the established session. At this time, a third PDU session establishment request carrying the routing descriptor may be sent to the session management network element to request the establishment of the first PDU session whose attribute information matches the routing descriptor.

In an implementation manner, the URSP rule includes a flow descriptor and a routing descriptor corresponding to the flow descriptor; a specific implementation manner for the terminal device to determine the first PDU session according to the URSP rule may be: determining the first service information Flow descriptor; if the flow descriptor of the first service information is the same as the flow descriptor included in the URSP rule, determine the fourth PDU session whose attribute information matches the routing descriptor in the established session; obtain The identification information of the port corresponding to the four PDU session; if the identification information of the port corresponding to the fourth PDU session is the same as the identification information of the first port, the fourth PDU session is regarded as the first PDU session.

In this technical solution, when the identification information of the port corresponding to the fourth PDU session is the same as the identification information of the first port, new service information (first service information) can be transmitted through the fourth PDU session, and through reuse The fourth PDU session is conducive to saving resources.

In an implementation manner, the URSP rule includes a flow descriptor and a routing descriptor corresponding to the flow descriptor; a specific implementation manner for the terminal device to determine the first PDU session according to the URSP rule may be: determining the first service information Flow descriptor; if the flow descriptor of the first service information is the same as the flow descriptor included in the URSP rule, determine the fourth PDU session whose attribute information matches the routing descriptor in the established session; obtain The identification information of the port corresponding to the fourth PDU session; if the identification information of the port corresponding to the fourth PDU session is different from the identification information of the first port, a fourth PDU session establishment request is sent to the session management network element, and the fourth PDU session The establishment request is used to request the establishment of the first PDU session; and to receive a fourth PDU session establishment response message from the session management network element, where the fourth PDU session establishment response message is used to indicate that the first PDU session is successfully established.

In this technical solution, when the identification information of the port corresponding to the fourth PDU session is different from the identification information of the first port, that is, when the terminal device cannot determine the first PDU session from the established session, the terminal device can pass the session The management network element sends a fourth PDU session establishment request to request the establishment of the first PDU session.

In an implementation manner, the URSP rule includes a flow descriptor and a routing descriptor corresponding to the flow descriptor; a specific implementation manner for the terminal device to determine the first PDU session according to the URSP rule may be: determining the first service information Flow descriptor; if the flow descriptor of the first service information is the same as the flow descriptor included in the URSP rule, determine the fifth PDU session whose attribute information matches the routing descriptor in the established session; obtain The identification information of the TSN terminal device corresponding to the fifth PDU session; if the identification information of the TSN terminal device corresponding to the fifth PDU session is the same as the identification information of the first TSN terminal device, the fifth PDU session is regarded as the first PDU session; , The first TSN terminal device has a topological connection relationship with the first port.

In this technical solution, when the identification information of the TSN terminal device corresponding to the fifth PDU session is the same as the identification information of the first TSN terminal device, the new service information (first service information) can be transmitted through the fifth PDU session. ), by reusing the fifth PDU session, it is helpful to save resources.

In an implementation manner, the URSP rule includes a flow descriptor and a routing descriptor corresponding to the flow descriptor; a specific implementation manner for the terminal device to determine the first PDU session according to the URSP rule may be: determining the first service information Flow descriptor; if the flow descriptor of the first service information is the same as the flow descriptor included in the URSP rule, determine the fifth PDU session whose attribute information matches the routing descriptor in the established session; obtain The identification information of the TSN terminal device corresponding to the fifth PDU session; if the identification information of the TSN terminal device corresponding to the fifth PDU session is different from the identification information of the first TSN terminal device, a fifth PDU session establishment request is sent to the session management network element , The fifth PDU session establishment request is used to request the establishment of the first PDU session; wherein, the first TSN terminal device has a topological connection relationship with the first port; and receives the fifth PDU session establishment response message from the session management network element. The fifth PDU session establishment response message is used to indicate that the first PDU session is successfully established.

In this technical solution, when the identification information of the TSN terminal device corresponding to the fifth PDU session is different from the identification information of the first TSN terminal device, that is, the terminal device cannot determine the first PDU session from the established session, the terminal device The fifth PDU session establishment request may be sent to the session management network element to request the establishment of the first PDU session.

In the second aspect, an embodiment of the present application provides another session processing method, the method includes: a policy control network element generates a URSP; and sends the URSP to a terminal device. The URSP rule in the URSP includes a traffic descriptor and a traffic description. The routing descriptor corresponding to the symbol; the flow descriptor includes the identification information of the port or the identification information of the TSN terminal device.

In an implementation manner, the routing descriptors corresponding to different traffic descriptors are different.

In an implementation manner, the foregoing flow descriptor includes port identification information; the routing descriptor corresponding to the flow descriptor includes one or more of the following: S-NSSAI, DNN, and port identification information.

In an implementation manner, the foregoing traffic descriptor includes identification information of the TSN terminal device; the routing descriptor corresponding to the traffic descriptor includes one or more of the following: S-NSSAI, DNN, identification information of the TSN terminal device .

In a third aspect, an embodiment of the present application provides yet another session processing method, the method includes: a session management network element receives a PDU session establishment request from a terminal device, the PDU session establishment request is used to request the establishment of a first PDU session, and the PDU The session establishment request includes the routing descriptor; the first PDU session is established according to the routing descriptor; the PDU session establishment response message is sent to the terminal device, and the PDU session establishment response message includes the routing descriptor, which is used for the PDU session establishment response message. To indicate that the first PDU session is successfully established; wherein, the routing descriptor includes identification information of the port or identification information of the TSN terminal device.

In this technical solution, the PDU session establishment response message includes the identification information of the port or the identification information of the TSN terminal device, which can facilitate the terminal device to determine the correspondence between the PDU session and the identification information of the port, or the PDU session and the TSN terminal device Correspondence between the identification information.

In a fourth aspect, an embodiment of the present application provides a communication device that can implement part or all of the functions of the terminal device in the method described in the first aspect. The functions in the embodiments may also have the functions of independently implementing any of the embodiments in this application. The function can be realized by hardware, or by hardware executing corresponding software. The hardware or software includes one or more units or modules corresponding to the above-mentioned functions.

In an implementation manner, the structure of the communication device may include a transceiver module and a processing module, and the processing module is configured to support the communication device to perform corresponding functions in the foregoing method. The transceiver module is used to support communication between the communication device and other equipment. The communication device may further include a storage module for coupling with the transceiver module and the processing module, which stores computer programs and data necessary for the communication device.

In an implementation manner, the communication device includes:

The transceiver module is used to receive URSP from the policy control network element;

The processing module is used to determine to transmit the first service information through the first port of the TSN conversion device; determine the URSP rule according to the URSP received from the policy control network element; and determine the first PDU session according to the URSP rule, and the first PDU session is used In the transmission of the first service information; the first PDU session is different from the PDU session used to transmit the second service information, the second service information is transmitted through the second port; the second port has a topological connection with the communication device 130 .

As an example, the processing module may be a processor, the transceiver module may be a transceiver or a communication interface, and the storage module may be a memory.

In an implementation manner, the communication device includes:

Transceiver, used to receive URSP from the policy control network element;

The processor is configured to determine to transmit the first service information through the first port of the TSN conversion device; determine the URSP rule according to the URSP received from the policy control network element; and determine the first PDU session according to the URSP rule, and the first PDU session is used In the transmission of the first service information; the first PDU session is different from the PDU session used to transmit the second service information, the second service information is transmitted through the second port; the second port has a topological connection with the communication device 130 .

In the fifth aspect, the embodiments of the present application provide another communication device that has some or all of the functions of the policy control network element in the method example described in the second aspect. For example, the function of the communication device may be Part or all of the functions in the embodiments may also have the functions of independently implementing any of the embodiments in this application. The function can be realized by hardware, or by hardware executing corresponding software. The hardware or software includes one or more units or modules corresponding to the above-mentioned functions.

In an implementation manner, the structure of the communication device may include a transceiver module and a processing module, and the processing module is configured to support the communication device to perform corresponding functions in the foregoing method. The transceiver module is used to support the communication between the communication device and other equipment. The communication device may further include a storage module for coupling with the transceiver module and the processing module, which stores computer programs and data necessary for the communication device.

In an implementation manner, the communication device includes:

Processing module, used to generate URSP;

The transceiver module is used to send the URSP to the terminal device. The URSP rule in the URSP includes a flow descriptor and a routing descriptor corresponding to the flow descriptor; the flow descriptor includes port identification information or TSN terminal device information Identification information.

In an implementation manner, the communication device includes:

Processor, used to generate URSP;

The transceiver is used to send the URSP to the terminal device. The URSP rule in the URSP includes a flow descriptor and a routing descriptor corresponding to the flow descriptor; the flow descriptor includes port identification information or TSN terminal device information Identification information.

In a sixth aspect, the embodiments of the present application provide yet another communication device that has some or all of the functions of the session management network element in the method example described in the third aspect. For example, the function of the communication device may be Part or all of the functions in the embodiments may also have the functions of independently implementing any of the embodiments in this application. The function can be realized by hardware, or by hardware executing corresponding software. The hardware or software includes one or more units or modules corresponding to the above-mentioned functions.

In an implementation manner, the communication device includes:

A transceiver module, configured to receive a PDU session establishment request from a terminal device, the PDU session establishment request is used to request the establishment of a first PDU session, and the PDU session establishment request includes a routing descriptor;

A processing module, configured to establish a first PDU session according to the routing descriptor;

The transceiver module is also used to send a PDU session establishment response message to the terminal device, the PDU session establishment response message includes a routing descriptor, and the PDU session establishment response message is used to indicate that the first PDU session is successfully established; wherein, the routing description The identifier includes the identification information of the port or the identification information of the TSN terminal device.

In an implementation manner, the communication device includes:

A transceiver, configured to receive a PDU session establishment request from a terminal device, where the PDU session establishment request is used to request establishment of a first PDU session, and the PDU session establishment request includes a routing descriptor;

A processor, configured to establish a first PDU session according to the routing descriptor;

The transceiver is also used to send a PDU session establishment response message to the terminal device, the PDU session establishment response message includes a routing descriptor, and the PDU session establishment response message is used to indicate that the first PDU session is successfully established; wherein, the routing description The identifier includes the identification information of the port or the identification information of the TSN terminal device.

In a seventh aspect, an embodiment of the present application provides a communication device, which includes a processor, and when the processor invokes a computer program in a memory, the method described in the first aspect is executed.

In an eighth aspect, an embodiment of the present application provides a communication device, which includes a processor, and when the processor invokes a computer program in a memory, the method described in the second aspect is executed.

In a ninth aspect, an embodiment of the present application provides a communication device that includes a processor, and when the processor invokes a computer program in a memory, the method described in the third aspect is executed.

In a tenth aspect, an embodiment of the present application provides a communication device that includes a processor and a memory, and the memory is used to store a computer program; the processor is used to execute the computer program stored in the memory to enable the communication device Perform the method described in the first aspect above.

In an eleventh aspect, an embodiment of the present application provides a communication device that includes a processor and a memory, and the memory is used to store a computer program; the processor is used to execute the computer program stored in the memory to enable the communication The device executes the method described in the second aspect above.

In a twelfth aspect, an embodiment of the present application provides a communication device that includes a processor and a memory, and the memory is used to store a computer program; the processor is used to execute the computer program stored in the memory to enable the communication The device executes the method described in the third aspect.

In a thirteenth aspect, an embodiment of the present application provides a communication device that includes a processor and an interface circuit, the interface circuit is configured to receive code instructions and transmit them to the processor, and the processor is configured to run the code instructions to enable The device executes the method described in the first aspect above.

In a fourteenth aspect, an embodiment of the present application provides a communication device that includes a processor and an interface circuit, the interface circuit is used to receive code instructions and transmit them to the processor, and the processor is used to run the code instructions to enable The device executes the method described in the second aspect above.

In a fifteenth aspect, an embodiment of the present application provides a communication device that includes a processor and an interface circuit, the interface circuit is used to receive code instructions and transmit them to the processor, and the processor is used to run the code instructions to enable The device executes the method described in the third aspect.

In a sixteenth aspect, an embodiment of the present application provides a session processing system, which includes the communication device described in the fourth aspect, the communication device described in the fifth aspect, and the communication device described in the sixth aspect; or, the system Including the communication device described in the seventh aspect, the communication device described in the eighth aspect, and the communication device described in the ninth aspect; or, the system includes the communication device described in the tenth aspect and the communication device described in the eleventh aspect Device and the communication device according to the twelfth aspect; or, the system includes the communication device according to the thirteenth aspect, the communication device according to the fourteenth aspect, and the communication device according to the fifteenth aspect.

In a seventeenth aspect, an embodiment of the present invention provides a computer-readable storage medium for storing a computer program used by the above-mentioned terminal device. When the computer program is running, the terminal device executes the method of the above-mentioned first aspect.

In an eighteenth aspect, an embodiment of the present invention provides a computer-readable storage medium for storing a computer program used by the above-mentioned policy control network element. When the computer program is running, the network device executes the method of the above-mentioned second aspect .

In a nineteenth aspect, an embodiment of the present invention provides a computer-readable storage medium for storing a computer program used by the above-mentioned session management network element. When the computer program is running, the network device executes the method of the above-mentioned third aspect .

In the twentieth aspect, this application also provides a computer program product including a computer program, which when running on a computer, causes the computer to execute the method described in the first aspect.

In the twenty-first aspect, the present application also provides a computer program product including a computer program, which when running on a computer, causes the computer to execute the method described in the second aspect.

In the twenty-second aspect, this application also provides a computer program product including a computer program, which when running on a computer, causes the computer to execute the method described in the third aspect.

In the twenty-third aspect, the present application provides a chip system that includes at least one processor and an interface, and is used to support the terminal device to implement the functions involved in the first aspect, for example, to determine or process the functions involved in the above method At least one of data and information. In a possible design, the chip system further includes a memory, and the memory is used to store necessary computer programs and data for the terminal device. The chip system can be composed of chips, and can also include chips and other discrete devices.

In a twenty-fourth aspect, the present application provides a chip system that includes at least one processor and an interface, and is used to support the network device to implement the functions involved in the second aspect, for example, to determine or process the functions involved in the above method At least one of data and information. In a possible design, the chip system further includes a memory, and the memory is used to store computer programs and data necessary for the network device. The chip system can be composed of chips, and can also include chips and other discrete devices.

In the twenty-fifth aspect, the present application provides a chip system that includes at least one processor and an interface, and is used to support the terminal device to implement the functions involved in the third aspect, for example, to determine or process the functions involved in the above method At least one of data and information. In a possible design, the chip system further includes a memory, and the memory is used to store necessary computer programs and data for the terminal device. The chip system can be composed of chips, and can also include chips and other discrete devices.

Description of the drawings

In order to more clearly describe the technical solutions in the embodiments of the present application or the background art, the following will describe the drawings that need to be used in the embodiments of the present application or the background art.

FIG. 1 is a schematic structural diagram of a communication system interoperating between a 5G network and a TSN network according to an embodiment of the application;

FIG. 2 is a schematic flowchart of a session processing method provided by an embodiment of the present application;

FIG. 3 is a schematic flowchart of another session processing method provided by an embodiment of the present application;

4 is a schematic flowchart of yet another session processing method provided by an embodiment of the present application;

FIG. 5 is a schematic flowchart of another session processing method provided by an embodiment of the present application;

FIG. 6 is a schematic flowchart of yet another session processing method provided by an embodiment of the present application;

FIG. 7 is a schematic flowchart of yet another session processing method provided by an embodiment of the present application;

FIG. 8 is a schematic flowchart of yet another session processing method provided by an embodiment of the present application;

FIG. 9 is a schematic flowchart of yet another session processing method provided by an embodiment of the present application;

FIG. 10 is a schematic flowchart of yet another session processing method provided by an embodiment of the present application;

FIG. 11 is a schematic flowchart of another session processing method provided by an embodiment of the present application;

FIG. 12 is a schematic flowchart of yet another session processing method provided by an embodiment of the present application;

FIG. 13 is a schematic structural diagram of a communication device provided by an embodiment of the present application;

FIG. 14 is a schematic structural diagram of another communication device provided by an embodiment of the present application;

FIG. 15 is a schematic structural diagram of a chip provided by an embodiment of the present application.

Detailed ways

To facilitate understanding, first introduce the terms involved in this application.

1. Session management network element

The session management network element may be responsible for forwarding path management, such as issuing a message forwarding strategy to the user plane network element, and instructing the user plane network element to process and forward the message according to the message forwarding strategy. The session management network element may be a session management function entity (session management function, SMF) in the 5th-generation mobile communication (the5th-generation, 5G) system. SMF can be responsible for session management in the mobile network, such as session establishment, session modification, session release, assigning IP addresses to users, and selecting user plane network elements that provide message forwarding functions. It should be noted that in future communication systems (for example, 6G or other communication systems), the session management network element may still be an SMF network element or have other names, which is not limited in this application.

2. User plane network element

The user plane network element may be a user plane function entity (UPF) in the 5G architecture, and the UPF may be responsible for processing user messages, such as forwarding and charging. In future communication systems (for example, 6G or other communication systems), the user plane network element may still be a UPF network element or have other names, which is not limited in this application.

3. Mobility management network element

The mobility management network element is responsible for the access and mobility management of user equipment (UE) in the mobile network. The mobility management network element may be an access and mobility management function (AMF) in 5G. AMF can be responsible for user location update, user registration network, user handover, UE access and mobility management, SMF selection, etc. AMF can be used as an intermediate network element to transmit session management messages between UE and SMF. In future communication systems (for example, 6G or other communication systems), the mobility management network element may still be an AMF network element or have other names, which is not limited in this application.

4. Policy control function (PCF)

PCF can be responsible for policy control decision-making and flow-based charging control. Specifically, the PCF may be responsible for providing policies, such as quality of service (QoS) policies, slice selection policies, etc., to mobility management network elements (such as AMF) and session management network elements (such as SMF).

5. User equipment routing selection policy (URSP)

The terminal device can determine the attribute information of the PDU session required by different applications (application, APP) through the URSP, and then determine the required PDU session according to the attribute information, and transmit the data of the APP through the PDU session. In the embodiment of this application, the terminal device can determine the required PDU session in the established PDU session according to the attribute information (that is, reuse the established PDU session), or the terminal device can create the required PDU session according to the attribute information .

The URSP may include one or more URSP rules, and the terminal device matches the APP with valid URSP rules to determine the required attribute information of the PDU session. Different URSP rules may have different priorities, and the priorities may be used to determine the order in which the terminal device executes the corresponding URSP rules. Specifically, the terminal device may preferentially execute the URSP rule with a higher priority.

Each URSP rule may include a traffic descriptor (traffic descriptor) and a route selection descriptor (route selection descriptor) corresponding to the traffic descriptor. Through the flow descriptor, it can be determined whether the URSP rule corresponding to the flow descriptor matches the APP. If they match, the terminal device can determine the attribute information of the PDU session required by the APP according to the routing descriptor corresponding to the traffic descriptor. If it does not match, the terminal device can determine whether other valid URSP rules match the APP. It should be noted that the traffic descriptor can correspond to one or more routing descriptors, and different routing descriptors can have different priorities. The traffic descriptor may include, but is not limited to, at least one of the following: application identifiers, IP descriptors, domain descriptors, and non-IP descriptors. The information in the URSP rules can be found in Table 1.

Table 1 URSP rules

In Table 1, the application identifier is used to uniquely identify an application. The IP triplet can include the destination IP address or IPv6 network prefix, destination port number, and protocol IDs above the protocol IP. The fully qualified domain name (FQDN) carries both the host name and the domain name. It should be noted that IP descriptors and non-IP descriptors will not exist at the same time. The attributes in the scope of the UE context in Table 1 are stored in the terminal device.

The routing descriptor may include at least one routing component. The routing component can be any of the following: session and service continuity (session and service continuity, SSC) mode selection, network slice selection, and data network name (data network name, DNN) selection. The information in the routing descriptor can be found in Table 2.

Table 2 Routing Descriptor

Among them, the SSC mode can meet different continuity requirements of terminal devices, and the SSC mode may include, but is not limited to, SSC mode 1, SSC mode 2, and SSC mode 3. Among them, when adopting SSC mode 1, the network retains the connection with the terminal device; when adopting SSC mode 2, the network can release the corresponding PDU session. In one implementation, the network can trigger the PDU session release and instruct the terminal device to establish a new PDU session: In SSC mode 3, the network allows a new PDU session to be established before the old PDU session is released.

Single network slice selection assistance information (single network slice selection assistance information, S-NSSAI) can be used to identify a network slice (network slice, NS). Network slicing refers to a logical network customized according to different service requirements on a physical or virtual network infrastructure. Network slicing can include but is not limited to the following types: enhanced mobile broadband (eMBB), ultra-reliable and low latency communications (URLLC), massive machine type communications, mMTC ). By selecting different types of network slices for data transmission, different network application scenarios can be flexibly dealt with.

In order to better understand a session processing method disclosed in the embodiment of the present application, the following first describes the communication system to which the embodiment of the present application applies.

Please refer to FIG. 1. FIG. 1 is a schematic structural diagram of a communication system for interworking between a 5G network and a delay-sensitive network TSN according to an embodiment of the application. The number and form of the devices shown in FIG. 1 are only used as examples and do not constitute a limitation to the embodiment of the present application. For example, the communication system may include, but is not limited to, a first delay-sensitive network TSN conversion device, and a second delay-sensitive network. A network TSN conversion device, two first delay-sensitive network TSN terminal devices (ie, the first delay-sensitive network terminal device 1 and the first delay-sensitive network terminal device 2), and a second delay-sensitive network TSN terminal device. Practical applications can include two or more first TSN conversion devices, two or more second TSN conversion devices, two or more second TSN terminal devices, three or more than three The first TSN terminal device, two or more terminal devices, etc. In addition, the first TSN conversion device shown in FIG. 1 includes two ports only for example and does not constitute a limitation to the embodiment of the present application. In practical applications, the first TSN conversion device may include more than two ports, or may include only one port. In addition, the connection between the terminal device and a first TSN conversion device in FIG. 1 is only used as an example and does not constitute a limitation to the embodiment of the present application. In practical applications, the terminal device can be connected with two or more first TSN conversion devices.

The communication system shown in FIG. 1 includes two first TSN terminal devices (first TSN terminal device 1 (101), first TSN terminal device 2 (102)), one first TSN conversion device 103, and one terminal device 104 , A wireless access device 105, a user plane network element 106, a second TSN conversion device 107, a second TSN terminal device 108, a policy control network element 109, a mobility management network element 110, and a session management network The element 111, and the first TSN conversion device 103 is connected to the first TSN terminal device 101 and the first TSN terminal device 102 through different ports as an example.

In Figure 1, all the network elements in the dashed box can be used as a logical TSN bridge (TSN bridge) as a whole, and the TSN bridge (or called 5G system (5G system, 5GS) bridge) can be used as a TSN TSN converter for interworking between network and 5G network. The function of the TSN converter may include a device-side TSN translator (DS-TT) and a network-side TSN converter (network-side TSN translator, NW-TT) on the device side. The 5G network can provide TSN inbound and outbound port information functions to the TSN network through DS-TT and NW-TT.

The TSN bridge may include a port on the anchor point (DS-TT) side, a user plane tunnel (ie, PDU session) between the terminal device 104 and the user plane network element 106, and a port on the DS-TT side. Through the port on the DS-TT side and the port on the NW-TT side, the 5G network can communicate with the TSN network. The PDU session established in the 5G network is associated with the port on the DS-TT side and the port on the NW-TT side. The logical TSN bridge can be granular with the user plane network element 106, and all PDU sessions connected to the same TSN network through the same user plane network element 106 can form a virtual bridge.

In a 5G network and a TSN network interworking system, a PDU session can be established separately for each DS-TT port, that is, no PDU session is shared between different DS-TT ports. It should be noted that different DS-TT ports may refer to different ports on the same DS-TT, or may refer to ports on different DS-TTs, which is not limited in the embodiment of the present application. The first TSN conversion device 103 in FIG. 1 may be the DS-TT, and the second TSN conversion device 107 in FIG. 1 may be the NW-TT.

In FIG. 1, the first TSN terminal device 101, the first TSN terminal device 102, and the second TSN terminal device 108 may be used to generate and/or receive time sensitive communication (time sensitive communication, TSC) service information, namely TSC Business data packets. The data message of the TSC service is generated by the terminal equipment in the TSN network.

The first TSN conversion device 103 and the second TSN conversion device 107 can be used to identify the configuration information issued by the TSN network controller (centralized network controller, CNC,) (not shown in FIG. 1), and according to the instructions of the TSN network controller Perform TSN related functions. For example, the first TSN conversion device 103 sends service information from the TSC network of the first TSN terminal device 1 to the terminal device 104, and then the terminal device 104 transmits the information to the terminal device 104 through the wireless access network device 105 and the user plane network element 106 The second TSN conversion device 107. Correspondingly, the second TSN conversion device 107 can convert the received information into information that can be recognized by the TSN network, and send the information that can be recognized by the TSN network to the second TSN terminal device 108.

The radio access network (RAN) device 105 can provide the terminal device 104 with wireless access. RAN equipment may include, but is not limited to: evolved NodeB (eNB), transmission reception point (TRP), next generation NodeB (gNB) in the NR system, and global interoperability for microwave access Base station (world interoperability for microwave accessbase station, WiMAX BS), base station in other future mobile communication systems or access point (AP) in wireless fidelity (wireless fidelity, WiFi) systems.

The policy control network element 109 may be used to generate a URSP and send the URSP to the terminal device 104. It should be noted that the policy control network element 109 and the terminal device 104 shown in FIG. 1 are connected to the session management network element 111 through the mobility management network element 110, that is, the URSP sent by the policy control network element 109 passes through the session management network elements 111, The transmission of the mobility management network element 110 to the terminal device 104 is only used as an example. In other implementation manners, the policy control network element 109 and the terminal device 104 may be connected through other network elements or directly connected.

The terminal device 104 may be used to determine to transmit the first service information through the first port of the first TSN conversion device 103; determine the URSP rule according to the URSP received from the policy control network element; and determine the first PDU session according to the URSP rule. The first PDU session is used to transmit the first service information; the first PDU session is different from the PDU session used to transmit the second service information, and the second service information can be transmitted through the second port; the second port is connected to the terminal device 104 has a topological connection relationship.

Among them, the first service information and the second service information may refer to time sensitive communication (time sensitive communication, TSC) service information, that is, the data message of the TSC service. The terminal device 104 determining that the first service information is transmitted through the first port of the first TSN conversion device 103 may indicate that the terminal device 104 may determine that the first service information will be transmitted through the first port of the first TSN conversion device 103. In an implementation manner, the first service information may be generated by the first TSN terminal device connected to the first port, and needs to be sent to the second TSN terminal device 108 through the first TSN conversion device 103 and the terminal device 104. In another implementation manner, the first service information may be generated by the second TSN terminal device 108, and needs to be transmitted to the first TSN terminal device connected to the first port through the terminal device 104 and the first TSN conversion device 103 . The first port may be any port in the first TSN conversion device 103.

It should be noted that the first TSN conversion device 103 and the terminal device 104 can be independent devices that are deployed separately, or they can be deployed together; the second TSN conversion device 107 and the user plane network element 106 can be independent devices that are deployed separately, or they can be combined. Deployment. The deployment mode shown in FIG. 1 does not constitute a limitation to the embodiment of the present application.

Optionally, the first TSN conversion device and the first TSN terminal device can be directly connected, or through other TSN switches or TSN bridges; the second TSN conversion device and the second TSN terminal device can be directly connected, or through other TSN switch or TSN bridge connection, the connection mode shown in FIG. 1 does not constitute a limitation to the embodiment of the present application.

Since the first service information needs to be transmitted through the 3GPP network, the terminal device 104 can determine the first PDU session for transmitting the first service information according to the URSP rule. There is a correspondence between the first PDU session and the first port. The corresponding relationship between the first PDU session and the first port may indicate that the first service information transmitted by the first PDU session will be transmitted through the first port. There may be multiple PDU sessions in the 3GPP network. If the second service information transmitted by the second PDU session is transmitted through a port different from the first port (such as the second port), then the first PDU session may communicate with the second PDU. The session is different.

Wherein, both the first port and the second port have a topological connection relationship with the terminal device 104, that is, the first port and the second port are connected to the same terminal device 104. Both the first port and the second port have a topological connection relationship with the terminal device 104, which can mean that the terminal device 104 will receive the first service information transmitted through the first port, and will receive the second service information transmitted through the second port , Or the terminal device 104 will transmit the first service information through the first port, and will transmit the second service information through the second port. In other words, the first PDU session for transmitting the first service information and the second PDU session for transmitting the second service information are both determined by the terminal device 104. It should be noted that the first port and the second port may be different ports on the same first TSN conversion device, or may be ports on different first TSN conversion devices, which is not limited in the embodiment of the present application.

By implementing the embodiments of the present application, it is possible to make the service information received by the terminal device transmitted through different ports have different corresponding PDU sessions, that is, it is possible to prevent the PDU sessions from being shared between different ports. Therefore, in this way, a suitable PDU session can be selected for the transmission of service information.

It should be noted that the technical solutions of the embodiments of the present application can be applied to various communication systems. For example: long term evolution (LTE) system, fifth generation (5G) mobile communication system, 5G new radio (NR) system, or other future new mobile communication systems, etc., as shown in Figure 1 The 5G system is taken as an example, and does not constitute a limitation to the embodiments of the present application.

The terminal device 104 in the embodiment of the present application may be an entity on the user side for receiving or transmitting signals. A terminal device may also be called a terminal (terminal), a user equipment (UE), a mobile station (mobile station, MS), a mobile terminal (mobile terminal, MT), and so on. Terminal devices can be mobile phones (mobile phones), wearable devices, tablet computers (Pad), computers with wireless transceiver functions, virtual reality (VR) terminal devices, augmented reality (AR) terminal devices, industrial Wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical surgery, wireless terminals in smart grids, transportation safety (transportation) Wireless terminals in safety), wireless terminals in smart cities, wireless terminals in smart homes, and so on. The embodiments of the present application do not limit the specific technology and specific device form adopted by the terminal device.

It is understandable that the communication system described in the embodiments of the present application is to illustrate the technical solutions of the embodiments of the present application more clearly, and does not constitute a limitation on the technical solutions provided in the embodiments of the present application. A person of ordinary skill in the art will know that With the evolution of the system 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.

The session processing method and device provided by the present application will be described in detail below with reference to the accompanying drawings.

Please refer to FIG. 2, which is a schematic flowchart of a session processing method provided by an embodiment of the present application. This method describes in detail how the terminal device determines the PDU session, so that the service information received by the terminal device transmitted through different ports has different corresponding PDU sessions. Among them, the execution subject of step S201, step S204 to step S205 is the terminal device, or the chip in the terminal device, the execution subject of step S202 to step S203 is the policy control network element, or the chip in the policy control network element, as follows Take the terminal device and the policy control network element as the execution subject of the session processing method as an example for description. As shown in Figure 2, the method may include but is not limited to the following steps:

Step S201: The terminal device determines to transmit the first service information through the first port of the TSN conversion device.

Wherein, the TSN conversion device may be the first TSN conversion device in FIG. 1. The terminal device determining that the first service information is transmitted through the first port of the first TSN conversion device may indicate that the terminal device may determine that the first service information will be transmitted through the first port of the first TSN conversion device. The first service information may be information generated by terminal devices in the TSN network.

Exemplarily, the terminal device may determine to transmit the first service information through the first port of the first TSN conversion device in any of the following situations: In the first case, the terminal device receives the first service information from the first TSN conversion device , And the first service information reaches the first TSN conversion device through the first port of the first TSN conversion device. In the second case, the terminal device receives the service routing information sent by the management plane device or the control plane device (109 or 111 in Fig. 1). The service routing information can be used to indicate that the first service information will pass through the first TSN conversion device And the first service information is generated by the first TSN terminal device (101 or 102 in FIG. 1) connected to the first TSN conversion device. In the third case, the terminal device receives the service routing information sent by the management plane device or the control plane device (109 or 111 in Fig. 1). The service routing information can be used to indicate that the first service information will pass through the first TSN conversion device The first port is transmitted to the first TSN terminal device (101 or 102 in Fig. 1) connected to the first TSN conversion device. In other words, the first service information can be generated by the second TSN terminal device (108 in FIG. 1) connected to the second TSN conversion device (107 in FIG. 1). It should be noted that in the second case and the third case, the terminal device may determine that the first service information will be transmitted through the first port without actually receiving the first service information.

Step S202: The policy control network element generates a URSP.

Specifically, the policy control network element may generate corresponding URSP rules according to the types of service information that may exist in the communication system shown in FIG. 1. The URSP rules corresponding to each type can form a URSP. For URSP and URSP rules, please refer to the previous description, which will not be repeated here.

Step S203: The policy control network element sends the URSP to the terminal device.

After the policy control network element generates the URSP, it can send the URSP to the terminal device. In the embodiment of the present application, the policy control network element may send the URSP to the mobility management network element (such as AMF), and then the mobility management network element sends the URSP to the terminal device. Optionally, if the terminal device is in the IDLE state, the mobility management network element may initiate a service request process, and after initiating the service request process, the terminal device will be paged. Furthermore, when the terminal device is in the CONNECTED state, the URSP is sent to the terminal device. Optionally, after receiving the URSP, the terminal device may notify the mobility management network element of the reception result, and the mobility management network element may notify the policy control network element of the reception result.

Step S204: The terminal device determines the URSP rule according to the URSP.

In the embodiment of the present application, after receiving the URSP from the policy control network element, the terminal device may determine the URSP rule according to the URSP. Among them, URSP may include one or more URSP rules, and different URSP rules may have different rule priorities. Optionally, the terminal device may determine a URSP with a higher rule priority from the URSP according to the order of rule priority.

It should be noted that the execution order of step S201 and the terminal device receiving the URSP is in no particular order. For example, the terminal device may first receive the URSP, and then perform step S201. Alternatively, the terminal device may perform step S201 first, and then receive the URSP. Alternatively, the terminal device may perform step S201 while receiving the URSP.

Step S205: The terminal device determines a first PDU session according to the URSP rule, and the first PDU session is used to transmit the aforementioned first service information; the first PDU session is different from the PDU session used to transmit the second service information, and the second The service information is transmitted through the second port; the second port has a topological connection relationship with the terminal device.

Specifically, after the terminal device determines the URSP rule, it can determine the attribute information (such as the first attribute information) of the PDU session applicable to the transmission of the first service information according to the URSP rule, and then determine that it has the first attribute according to the first attribute information. The first PDU session of information. There may be multiple PDU sessions in the 3GPP network. If the second service information transmitted by the second PDU session is transmitted through a port different from the first port (such as the second port), then the first PDU session may communicate with the second PDU. The session is different. By implementing the embodiments of the present application, it is possible to make the service information received by the terminal device transmitted through different ports have different corresponding PDU sessions, that is, it is possible to prevent the PDU sessions from being shared between different ports. Compared with the existing URSP mechanism, the terminal device may determine the same PDU session for the service information transmitted through different ports, which will cause the terminal device to further process the downlink service according to the service characteristics. Services are matched to different ports of the same first TSN conversion device or to ports of different first TSN conversion devices, which will increase the complexity of terminal device implementation. Therefore, by implementing the embodiments of the present application, a suitable PDU session can be selected for the transmission of service information, which is also beneficial to reduce the complexity of terminal equipment implementation and improve the efficiency of the terminal equipment in processing downlink services.

Optionally, after determining the URSP rule, the terminal device can determine whether the URSP rule is valid. If the URSP rule is valid, the first PDU session can be determined according to the URSP rule. If the URSP rule is invalid, other valid URSP rules can be selected from the URSP to determine the PDU session used to transmit the first service information.

In the embodiment of the present application, each URSP rule may include a flow descriptor and a routing descriptor corresponding to the flow descriptor. The traffic descriptor can correspond to one or more routing descriptors, and different routing descriptors can have different priorities. Exemplarily, the process for the terminal device to determine the first attribute information may be as follows: the terminal device determines the flow descriptor of the first service information; if the flow descriptor of the first service information is the same as the flow descriptor included in the URSP rule, it may Determine a routing descriptor (such as routing descriptor 1) from the routing descriptor corresponding to the traffic descriptor, for example, select the routing descriptor corresponding to the traffic descriptor in the order of priority of the routing descriptor A routing descriptor is determined in the symbol; then, the terminal device can determine the first attribute information according to the routing descriptor 1. For example, the terminal device may determine the routing descriptor 1 as the first attribute information.

In an implementation manner, the terminal device may determine a first PDU session whose attribute information is the same as the first attribute information from an established session, and transmit the first service information through the first PDU session. In this way, the first PDU session can be reused. Optionally, if there are multiple PDU sessions with the same attribute information as the first attribute information in the established session, the terminal device may determine the first PDU session from the multiple PDU sessions randomly or according to a preset rule. In another implementation manner, the terminal device may create a first PDU session with the first attribute information. Optionally, the terminal device may create a first PDU session with the first attribute information in the case that there is no PDU session with the same attribute information as the first attribute information in the established session.

In an implementation manner, the URSP rule may include a flow descriptor and a routing descriptor corresponding to the flow descriptor. The specific implementation manner for the terminal device to determine the first PDU session according to the URSP rule may be: if the flow descriptor If it matches the first port, the terminal device can determine the first PDU session according to the routing descriptor (corresponding to the traffic descriptor) and the attribute information of the established session. Wherein, the match between the flow descriptor and the first port may indicate that the URSP rule corresponding to the flow descriptor matches the first service information transmitted through the first port, that is, the traffic descriptor corresponding to the The routing descriptor determines the attribute information of the first PDU session used to transmit the first service information. Optionally, the routing descriptor corresponding to the traffic descriptor may be used as the attribute information of the first PDU session. The terminal device determines the first PDU session according to the routing descriptor (corresponding to the traffic descriptor) and the attribute information of the established session, which is beneficial to determine the first PDU session from the established sessions, that is, the first PDU session can be reused. In this way, new PDU sessions can be avoided, which is conducive to saving resources.

In an implementation manner, if there is a PDU session whose attribute information matches the routing descriptor in the established session, the terminal device determines the execution process of the first PDU session, refer to any of the embodiments shown in FIGS. 3 to 7 The specific description in. If there is no PDU session whose attribute information matches the routing descriptor in the established session, the terminal device determines the execution process of the first PDU session can refer to the specific description in any embodiment shown in FIG. 8.

In an implementation manner, the traffic descriptor may include the identification information of the port or the identification information of the TSN terminal device. The identification information of the port can be used to uniquely identify a port. For example, the identification information of the port can be a port number or a media access control (MAC) address of the port. It should be noted that the ports mentioned in the embodiments of this application all refer to ports on the TSN conversion device. The identification information of the TSN terminal device included in the traffic descriptor can be used to uniquely identify a first TSN terminal device, that is, a TSN terminal device connected to the first TSN conversion device. The identification information of the TSN terminal device included in the flow descriptor may be used to indicate the source MAC address or the destination MAC address of the TSN service information, that is, the TSN terminal device indicated by the identification information included in the flow descriptor may be a device that generates TSN service information, Alternatively, the TSN terminal device indicated by the identification information included in the traffic descriptor may be a device that the TSN service information needs to reach.

In an implementation manner, when the flow descriptor includes the identification information of the port, if the identification information of the port included in the flow descriptor is the same as the identification information of the first port (that is, the port indicated by the identification information included in the flow descriptor is the same as the identification information of the first port). The first port is the same), it can be determined that the traffic descriptor matches the first port.

In one implementation, when the flow descriptor includes the identification information of the TSN terminal device, if the identification information of the TSN terminal device included in the flow descriptor is the same as the identification information of the first TSN terminal device (that is, the identification information included in the flow descriptor is the same as the identification information of the first TSN terminal device). The TSN terminal device indicated by the information is the same as the first TSN terminal device), it can be determined that the traffic descriptor matches the first port. Wherein, the first TSN terminal device may have a topological connection relationship with the first port. The topological connection between the first TSN terminal device and the first port may indicate that the service information generated by the first TSN terminal device will be transmitted through the first port, or the service information transmitted through the first port will be transmitted To the first TSN terminal device.

Please refer to FIG. 3, which is a schematic flowchart of another session processing method provided by an embodiment of the present application. This method describes in detail how the terminal device determines the PDU session when the URSP rule includes a flow descriptor and a routing descriptor corresponding to the flow descriptor, and the routing descriptors corresponding to different flow descriptors are different. The service information transmitted through different ports received by the terminal device corresponds to different PDU sessions. Among them, the execution subject of step S301, step S304 to step S305 is the terminal device, or the chip in the terminal device, the execution subject of step S302 to step S303 is the policy control network element, or the chip in the policy control network element, as follows Take the terminal device and the policy control network element as the execution subject of the session processing method as an example for description. As shown in Figure 3, the method may include but is not limited to the following steps:

Step S301: The terminal device determines to transmit the first service information through the first port of the TSN conversion device.

Step S302: The policy control network element generates a URSP.

Step S303: The policy control network element sends the URSP to the terminal device.

It should be noted that, for the execution process of step S301 to step S303, please refer to the specific description of step S201 to step S203 in FIG. 2 respectively, which will not be repeated here.

Step S304: The terminal device determines a URSP rule according to the URSP; the URSP rule includes a flow descriptor and a routing descriptor corresponding to the flow descriptor, and routing descriptors corresponding to different flow descriptors are different.

In the embodiment of the present application, the routing descriptor may be used to determine the attribute information of the PDU session. In the case that the routing descriptors corresponding to different traffic descriptors are different, if the selected traffic descriptors are different for different service information, the attribute information of the PDU session determined according to the corresponding routing descriptors is different. Therefore, the PDU sessions used to transmit different service information can be made different.

It should be noted that, for the rest of the execution process of step S304, please refer to the specific description of step S204 in FIG. 2, which will not be repeated here.

Step S305: If the traffic descriptor matches the aforementioned first port, the terminal device determines the first PDU session whose attribute information matches the routing descriptor in the established session, and the first PDU session is used to transmit the aforementioned First service information; the first PDU session is different from the PDU session used to transmit the second service information, and the second service information is transmitted through the second port; the second port has a topological connection with the terminal device.

In the embodiment of this application, if there are one or more PDU sessions 1 whose attribute information matches the routing descriptor in the established session, the one or more PDU sessions 1 can be selected randomly or according to a preset rule. Determine the first PDU session. Since the ports used to transmit the first service information and the second service information are different, the selected traffic descriptors are different for the first service information and the second service information. Correspondingly, for the first service information and the second service information, the selected routing descriptors are different, and therefore, the determined attribute information of the PDU session is also different. Furthermore, the first PDU session used to transmit the first service information can be made different from the second PDU session used to transmit the second service information. In this way, it is possible to make the service information received by the terminal equipment transmitted through different ports have different corresponding PDU sessions, that is, it is possible to prevent the PDU sessions from being shared between different ports. Therefore, in this way, a suitable PDU session can be selected for the transmission of service information. It should be noted that, for the rest of the execution process of step S305, refer to the specific description of step S205 in FIG. 2, which will not be repeated here.

In one implementation, the traffic descriptor may include at least one of the application identifier, IP descriptor, domain descriptor, and non-IP descriptor (the traffic descriptor does not simultaneously include the IP descriptor and the non-IP descriptor) , It can also include the port identification information, that is, the port identification information can be added to the flow descriptor in the URSP rule (Table 1). At this time, the information in the URSP rules can be found in Table 3.

Table 3 URSP rules

The aforementioned matching of the flow descriptor with the first port may mean that the identification information of the port included in the flow descriptor is the same as the identification information of the first port, that is, the port indicated by the identification information included in the flow descriptor is the same as the first port.

If other descriptors exist and (such as at least one of the application identifier, domain descriptor and non-IP descriptor) are the same, the URSP rule can match different routing descriptors for different (port) identification information . At this time, the URSP rule that different (port) identification information matches different routing descriptors can mean that the S-NSSAI and/or DNN in the routing descriptors are different.

In one implementation, the traffic descriptor may include at least one of the application identifier, IP descriptor, domain descriptor, and non-IP descriptor (the traffic descriptor does not simultaneously include the IP descriptor and the non-IP descriptor) , It can also include port identification information. In addition to at least one of SSC mode selection, network slice selection, and DNN selection, the routing component in the routing descriptor can also include port identification information. The identification information of the port is added to the flow descriptor in the rule (Table 1), and the routing component, the identification information of the port, is added to the routing descriptor (Table 2). At this time, the information in the URSP rule can be referred to Table 3, and the information in the routing descriptor can be referred to Table 4.

Table 4 Routing Descriptor

If other descriptors exist and (such as at least one of the application identifier, domain descriptor, and non-IP descriptor) are the same, the URSP rule can match different routing descriptors for different (port) identification information . At this time, the URSP rule that different (port) identification information matches different routing descriptors can mean: the identification information of the port in the routing descriptor is different; or the identification information of the port in the routing descriptor and S -NSSAI is different; or, the port identification information in the routing descriptor is different from the DNN; or, the port identification information in the routing descriptor, S-NSSAI and DNN are different.

In one implementation, the traffic descriptor may include at least one of the application identifier, IP descriptor, domain descriptor, and non-IP descriptor (the traffic descriptor does not simultaneously include the IP descriptor and the non-IP descriptor) , It may also include the identification information of the TSN terminal device, that is, the identification information of the TSN terminal device may be added to the flow descriptor in the URSP rule (Table 1). At this time, the information in the URSP rules can be seen in Table 5.

Table 5 URSP rules

The foregoing flow descriptor matching the first port may mean that the identification information of the TSN terminal device included in the flow descriptor is the same as the identification information of the first TSN terminal device, that is, the TSN terminal device indicated by the identification information included in the flow descriptor is The first TSN terminal equipment is the same. Wherein, the first TSN terminal device may have a topological connection relationship with the first port.

If the TSN terminal devices indicated by different (TSN terminal devices) identification information are connected to the same port, the URSP rule may match the same routing descriptor for the different (TSN terminal devices) identification information. If the TSN terminal equipment indicated by different (TSN terminal equipment) identification information is connected to different ports (including ports connected to different TSN conversion equipment, or connected to different ports on the same TSN conversion equipment), even if other descriptors (For example, at least one of the application identifier, domain descriptor, and non-IP descriptor) is the same, and the URSP rule can match different routing descriptors for the different (TSN terminal device) identification information. At this time, the URSP rule matching different routing descriptors for different (TSN terminal equipment) identification information may mean that the S-NSSAI and/or DNN in the routing descriptors are different.

In one implementation, the traffic descriptor may include at least one of the application identifier, IP descriptor, domain descriptor, and non-IP descriptor (the traffic descriptor does not simultaneously include the IP descriptor and the non-IP descriptor) , It may also include the identification information of the TSN terminal device, and the routing component in the routing descriptor may include at least one of SSC mode selection, network slice selection and DNN selection, and may also include the identification information of the TSN terminal device, That is, the identification information of the TSN terminal device can be added to the flow descriptor in the URSP rule (Table 1), and the routing component of the identification information of the TSN terminal device can be added to the routing descriptor (Table 2). At this time, the information in the URSP rule can be referred to Table 5, and the information in the routing descriptor can be referred to Table 6.

Table 6 Routing Descriptor

If the TSN terminal devices indicated by different (TSN terminal devices) identification information are connected to the same port, the URSP rule may match the same routing descriptor for the different (TSN terminal devices) identification information. If the TSN terminal equipment indicated by different (TSN terminal equipment) identification information is connected to different ports (including ports connected to different TSN conversion equipment, or connected to different ports on the same TSN conversion equipment), even if other descriptors (For example, at least one of the application identifier, domain descriptor, and non-IP descriptor) is the same, and the URSP rule can match different routing descriptors for the different (TSN terminal device) identification information. At this time, the URSP rule is that different (TSN terminal equipment) identification information matches different routing descriptors, which can mean: the identification information of the TSN terminal equipment in the routing descriptor is different; or, the TSN terminal in the routing descriptor The identification information of the device is different from the S-NSSAI; or, the identification information of the TSN terminal device in the routing descriptor is different from the DNN; or, the identification information of the TSN terminal device in the routing descriptor, S-NSSAI and DNN are different.

In the embodiment of the present application, since the ports used to transmit the first service information and the second service information are different, the selected traffic descriptors are different for the first service information and the second service information. Correspondingly, for the first service information and the second service information, the selected routing descriptors are different, and therefore, the determined attribute information of the PDU session is also different. Furthermore, the first PDU session used to transmit the first service information can be made different from the second PDU session used to transmit the second service information. In this way, it is possible to make the service information received by the terminal equipment transmitted through different ports have different corresponding PDU sessions, that is, it is possible to prevent the PDU sessions from being shared between different ports. Therefore, in this way, a suitable PDU session can be selected for the transmission of service information.

Please refer to FIG. 4, which is a schematic flowchart of another session processing method provided by an embodiment of the present application. This method describes in detail how the terminal device determines the PDU session according to the corresponding relationship between the established session (such as the second PDU session) and the identification information of the port, so that the service information received by the terminal device transmitted through different ports corresponds to The PDU session is different. Among them, the execution subject of step S401, step S404 to step S407 is the terminal device, or the chip in the terminal device, the execution subject of step S402 to step S403 is the policy control network element, or the chip in the policy control network element, as follows Take the terminal device and the policy control network element as the execution subject of the session processing method as an example for description. As shown in Figure 4, the method may include but is not limited to the following steps:

Step S401: The terminal device determines to transmit the first service information through the first port of the TSN conversion device.

Step S402: The policy control network element generates a URSP.

Step S403: The policy control network element sends the URSP to the terminal device.

Step S404: The terminal device determines a URSP rule according to the URSP, and the URSP rule includes a flow descriptor and a routing descriptor corresponding to the flow descriptor.

It should be noted that, for the execution process of step S401 to step S404, please refer to the detailed description of step S201 to step S204 in FIG.

Step S405: If the traffic descriptor matches the first port, the terminal device determines a second PDU session whose attribute information matches the routing descriptor in the established session.

Wherein, the traffic descriptor may include port identification information. The matching of the flow descriptor with the first port may mean that the identification information of the port included in the flow descriptor is the same as the identification information of the first port, that is, the port indicated by the identification information included in the flow descriptor is the same as the first port.

If there are one or more PDU sessions 1 whose attribute information matches the routing descriptor in the established session, the second PDU session may be determined from the one or more PDU sessions 1 randomly or according to a preset rule. For the execution process of matching the flow descriptor with the first port, refer to the specific description of step S205 in FIG. 2, which will not be repeated here.

In the embodiment of the present application, the routing descriptors corresponding to different traffic descriptors may be different or the same. In the case that the routing descriptors corresponding to different traffic descriptors are different, if the selected traffic descriptors are different for different service information, the attribute information of the PDU session determined according to the corresponding routing descriptors is different. At this time, the PDU sessions used to transmit different service information can be made different. If different service information is transmitted through different ports, the PDU session may not be shared between different ports.

In the case that the routing descriptors corresponding to different traffic descriptors are the same, if the selected traffic descriptors are different for different service information, but the routing descriptors corresponding to the different selected traffic descriptors are the same, the PDU session is determined The attribute information is the same. At this time, the PDU sessions used to transmit different service information can be made the same. When different service information is transmitted through different ports, it cannot be satisfied that the PDU session is not shared between different ports.

For example, if service information 1 is transmitted through port 1, and service information 2 is transmitted through port 2, the port indicated by the identification information included in flow descriptor 1 is the same as port 1 (that is, flow descriptor 1 matches port 1), flow description The port indicated by the identification information included in the symbol 2 is the same as that of the port 2 (that is, the flow descriptor 2 matches the port 2), and the routing descriptors corresponding to the flow descriptor 1 and the flow descriptor 2 (such as routing descriptor 1 ) Is the same, the session attributes determined according to routing descriptor 1 will be the same. Further, the PDU session determined in the established session based on the session attributes may be the same as the PDU session used for transmitting service information. The PDU session of information 2 is the same.

Step S406: The terminal device obtains the identification information of the port corresponding to the second PDU session.

In the embodiment of the present application, after each terminal device establishes a PDU session (including the second PDU session) for transmitting service information, the corresponding relationship between the PDU session and the identification information of the port for transmitting the service information may be stored. So that the terminal device can subsequently obtain and use the corresponding relationship.

The correspondence between the PDU session and the identification information of the port may indicate that the PDU session may be used to transmit service information transmitted through the port. For example, if the second PDU session has a corresponding relationship with the identification information of port 1, it may indicate that the second PDU session can be used to transmit service information transmitted through port 1, but cannot be used to transmit information transmitted through ports other than port 1. Business information.

Step S407: If the identification information of the port corresponding to the second PDU session is the same as the identification information of the first port, the terminal device uses the second PDU session as the first PDU session, and the first PDU session is used to transmit the aforementioned first PDU session. Service information; the first PDU session is different from the PDU session used to transmit the second service information, and the second service information is transmitted through the second port; the second port has a topological connection with the terminal device.

The identification information of the port corresponding to the second PDU session is the same as the identification information of the first port, which may indicate that the second PDU session may be used to transmit service information (that is, first service information) transmitted via the first port. Therefore, the terminal device can use the second PDU session as the first PDU session. The identification information of the port corresponding to the second PDU session is the same as the identification information of the first port, which may include the following situations: the service information 1 transmitted by the second PDU session is transmitted to the first TSN conversion device through the first port, or the second The service information 1 transmitted in the PDU session is transmitted to the first TSN terminal device connected to the first TSN conversion device through the first port, or the service information 1 transmitted in the second PDU session is transmitted to the first TSN conversion through the first port The next hop TSN device of the device. The above situation means that the service information 1 and the first service information are transmitted through the same port (i.e., the first port). Service information transmitted through the same port can share the same PDU session. Therefore, the terminal device can use the second PDU session as the first PDU session. In this way, new service information (first service information) can be transmitted through the second PDU session, and by reusing the second PDU session, it is beneficial to save resources.

In an implementation manner, the identification information of the port corresponding to the second PDU session is different from the identification information of the first port, which may indicate that the first port is different from the port used to transmit the service information 1 (transmitted by the second PDU session). different. Therefore, the second PDU session cannot be used to transmit the first service information (transmitted via the first port). In this case, the terminal device can send a PDU session establishment request to the session management network element, and the PDU session establishment request is used to request Establish a first PDU session for transmitting the first service information. In this way, different ports can be prevented from sharing the same PDU session.

It should be noted that the rest of the execution process of step S407 can be referred to the specific description of step S205 in FIG. 2, which will not be repeated here.

By implementing the embodiments of the present application, when the identification information of the port corresponding to the second PDU session is the same as the identification information of the first port, new service information (first service information) can be transmitted through the second PDU session, and through Reusing the second PDU session is conducive to saving resources.

Please refer to FIG. 5, which is a schematic flowchart of another session processing method provided by an embodiment of the present application. This method describes in detail how the terminal device determines the first PDU when the identification information of the port corresponding to the second PDU session is different from the identification information of the first port, that is, the terminal device cannot determine the first PDU session from the established session Conversation. Among them, the execution subject of step S501, step S504 to step S508 is the terminal device, or the chip in the terminal device, the execution subject of step S502 to step S503 is the policy control network element, or the chip in the policy control network element, as follows Take the terminal device and the policy control network element as the execution subject of the session processing method as an example for description. As shown in Figure 5, the method may include but is not limited to the following steps:

Step S501: The terminal device determines to transmit the first service information through the first port of the TSN conversion device.

Step S502: The policy control network element generates a URSP.

Step S503: The policy control network element sends the URSP to the terminal device.

Step S504: The terminal device determines a URSP rule according to the URSP. The URSP rule includes a flow descriptor and a routing descriptor corresponding to the flow descriptor.

Step S505: If the traffic descriptor matches the first port, the terminal device determines the second PDU session whose attribute information matches the routing descriptor in the established session.

Step S506: The terminal device obtains the identification information of the port corresponding to the second PDU session.

It should be noted that, for the execution process of step S501 to step S504, please refer to the specific description of step S201 to step S204 in FIG. 2 respectively. For the execution process of step S505 to step S506, please refer to the specific description of step S405 to step S406 in FIG. 4 respectively. , I won’t repeat it here.

Step S507: If the identification information of the port corresponding to the second PDU session is different from the identification information of the first port, the terminal device sends a first PDU session establishment request to the session management network element, and the first PDU session establishment request is used to request Establish a first PDU session, the first PDU session is used to transmit the aforementioned first service information; the first PDU session is different from the PDU session used to transmit the second service information, and the second service information is transmitted through the second port; The second port has a topological connection relationship with the terminal device.

The difference between the identification information of the port corresponding to the second PDU session and the identification information of the first port may indicate that the first port is different from the port used to transmit the service information 1 (transmitted by the second PDU session). Therefore, the second PDU session cannot be used to transmit the first service information (transmitted via the first port). In this case, the terminal device cannot determine the first PDU session from the established session. The network element sends a first PDU session establishment request to request the establishment of the first PDU session. It should be noted that, for the rest of the execution process of step S507, refer to the specific description of step S205 in FIG. 2, which will not be repeated here.

Step S508: The terminal device receives a first PDU session establishment response message from the session management network element, where the first PDU session establishment response message is used to indicate that the first PDU session is successfully established.

Specifically, after receiving the first PDU session establishment request, the session management network element may establish the first PDU session. And send the first PDU session establishment response message to the terminal device.

In an implementation manner, after the terminal device determines that the first PDU session is successfully established, the corresponding relationship between the first PDU session and the identification information of the first port may be stored, so that the terminal device can subsequently obtain and use the corresponding relationship.

In the embodiment of the present application, when the identification information of the port corresponding to the second PDU session is different from the identification information of the first port, that is, when the terminal device cannot determine the first PDU session from the established session, the terminal device can pass the The session management network element sends a first PDU session establishment request to request a new first PDU session.

Please refer to FIG. 6, which is a schematic flowchart of another session processing method provided by an embodiment of the present application. This method describes in detail how the terminal device determines the PDU session according to the correspondence between the established session (such as the third PDU session) and the identification information of the TSN terminal device. Among them, the execution subject of step S601, step S604 to step S607 is the terminal device, or the chip in the terminal device, the execution subject of step S602 to step S603 is the policy control network element, or the chip in the policy control network element, as follows Take the terminal device and the policy control network element as the execution subject of the session processing method as an example for description. As shown in Figure 6, the method may include but is not limited to the following steps:

Step S601: The terminal device determines to transmit the first service information through the first port of the TSN conversion device.

Step S602: The policy control network element generates a URSP.

Step S603: The policy control network element sends the URSP to the terminal device.

Step S604: The terminal device determines a URSP rule according to the URSP, and the URSP rule includes a flow descriptor and a routing descriptor corresponding to the flow descriptor.

It should be noted that, for the execution process of step S601 to step S604, please refer to the detailed description of step S201 to step S204 in FIG.

Step S605: If the traffic descriptor matches the first port, the terminal device determines a third PDU session whose attribute information matches the routing descriptor in the established session.

Wherein, the traffic descriptor may include the identification information of the TSN terminal device. The matching of the flow descriptor with the first port may mean: the identification information of the TSN terminal device included in the flow descriptor is the same as the identification information of the first TSN terminal device, that is, the TSN terminal device indicated by the identification information included in the flow descriptor and the first port A TSN terminal equipment is the same.

If there are one or more PDU sessions 1 whose attribute information matches the routing descriptor in the established session, the third PDU session may be determined from the one or more PDU sessions 1 randomly or according to a preset rule. For the execution process of matching the traffic descriptor with the first port, please refer to the specific description of step S205 in FIG. 2, which will not be repeated here.

For example, if service information 1 is generated by TSN terminal device 1, and service information 2 is generated by TSN terminal device 2, the TSN terminal device indicated by the identification information included in traffic descriptor 1 has a topological connection with port 1 (that is, traffic descriptor 1 Match with port 1), the TSN terminal device indicated by the identification information included in the flow descriptor 2 has a topological connection with port 2 (that is, the flow descriptor 2 matches the port 2), and the flow descriptor 1 and the flow descriptor 2 If the corresponding routing descriptors (such as routing descriptor 1) are the same, the session attributes determined according to routing descriptor 1 will be the same. Further, it may cause the usage determined in the established session according to the session attributes. The PDU session used to transmit service information 1 is the same as the PDU session used to transmit service information 2.

Step S606: The terminal device obtains the identification information of the TSN terminal device corresponding to the third PDU session.

The identification information of the TSN terminal device corresponding to the third PDU session can be used to indicate: the source address or destination address information corresponding to the service information (such as service information 2) transmitted by the third PDU session, that is, the TSN terminal corresponding to the third PDU session The device may be the TSN terminal device that generates the service information 2, or it may be the destination TSN terminal device that the service information 2 reaches. The corresponding relationship between the PDU session and the identification information of the TSN terminal device can indicate that the PDU session can be used to transmit service information generated by the TSN terminal device, or the PDU session can be used to transmit the destination device to the TSN terminal device. Business information. In the embodiment of the present application, after each terminal device establishes a PDU session (including the third PDU session) for transmitting service information, it may store the source address or destination corresponding to the PDU session and the service information 2 transmitted by the PDU session. The corresponding relationship between the address information (that is, the identification information of the TSN terminal device), so that the terminal device can subsequently obtain and use the corresponding relationship.

Step S607: If the identification information of the TSN terminal device corresponding to the third PDU session is the same as the identification information of the first TSN terminal device, the terminal device uses the third PDU session as the first PDU session, and the first PDU session is used for The foregoing first service information is transmitted; the first PDU session is different from the PDU session used to transmit the second service information, and the second service information is transmitted through a second port; the second port has a topological connection with the terminal device; wherein , The first TSN terminal device has a topological connection relationship with the first port.

The identification information of the TSN terminal device corresponding to the third PDU session is the same as the identification information of the first TSN terminal device, which can mean that the service information 2 and the first service information transmitted in the third PDU session are both generated by the first TSN terminal device. Or, both the service information 2 and the first service information transmitted in the third PDU session need to be transmitted to the first TSN terminal device. Therefore, the service information 2 and the first service information will be transmitted through the same port (ie, the first port). Service information transmitted through the same port can share the same PDU session. Therefore, the terminal device can use the third PDU session as the first PDU session. In this way, new service information (first service information) can be transmitted through the third PDU session, and by reusing the third PDU session, it is beneficial to save resources.

In an implementation manner, the identification information of the TSN terminal device corresponding to the third PDU session is different from the identification information of the first TSN terminal device, which may indicate that the service information 2 transmitted by the third PDU session does not pass through the first TSN terminal device. Generate, or, the service information 2 transmitted in the third PDU session does not need to be transmitted to the first TSN terminal device. If the TSN terminal device that generates the service information 2 and the first TSN terminal device are connected to different ports, the first port is different from the port used to transmit the service information 2. Therefore, the third PDU session cannot be used to transmit the first service information. In this case, the terminal device cannot determine the first PDU session from the established sessions, and the terminal device can request the establishment of the first PDU session by sending a PDU session establishment request to the session management network element.

It should be noted that the rest of the execution process of step S607 can be referred to the specific description of step S205 in FIG. 2, which will not be repeated here.

By implementing the embodiments of this application, when the identification information of the TSN terminal device corresponding to the third PDU session is the same as the identification information of the first TSN terminal device, new service information (first service information) can be transmitted through the third PDU session. Information), by reusing the third PDU session, it is helpful to save resources.

Please refer to FIG. 7, which is a schematic flowchart of another session processing method provided by an embodiment of the present application. This method describes in detail when the identification information of the TSN terminal device corresponding to the third PDU session is different from the identification information of the first TSN terminal device, that is, the terminal device cannot determine the first PDU session from the established session. Determine the first PDU session. Among them, the execution subject of step S701, step S704 to step S708 is the terminal device, or the chip in the terminal device, the execution subject of step S702 to step S703 is the policy control network element, or the chip in the policy control network element, as follows Take terminal equipment and policy control network elements as the execution subject of the session processing method as an example for description. As shown in Figure 7, the method may include but is not limited to the following steps:

Step S701: The terminal device determines to transmit the first service information through the first port of the TSN conversion device.

Step S702: The policy control network element generates a URSP.

Step S703: The policy control network element sends the URSP to the terminal device.

Step S704: The terminal device determines a URSP rule according to the URSP. The URSP rule includes a flow descriptor and a routing descriptor corresponding to the flow descriptor.

Step S705: If the traffic descriptor matches the first port, the terminal device determines a third PDU session whose attribute information matches the routing descriptor in the established session.

Step S706: The terminal device obtains the identification information of the TSN terminal device corresponding to the third PDU session.

It should be noted that the execution process of step S701 to step S704 can be referred to the specific description of step S201 to step S204 in FIG. 2 respectively, and the execution process of step S705 to step S706 can be referred to the specific description of step S605 to step S606 in FIG. 6 respectively. , I won’t repeat it here.

Step S707: If the identification information of the TSN terminal device corresponding to the third PDU session is different from the identification information of the first TSN terminal device, the terminal device sends a second PDU session establishment request to the session management network element, and the second PDU session is established The request is used to request the establishment of the first PDU session, which is used to transmit the aforementioned first service information; the first PDU session is different from the PDU session used to transmit the second service information, and the second service information passes through the second Port transmission; the second port has a topological connection relationship with the terminal device; wherein, the first TSN terminal device has a topological connection relationship with the first port.

The difference between the identification information of the TSN terminal device corresponding to the third PDU session and the identification information of the first TSN terminal device may indicate that the service information 2 transmitted in the third PDU session is not generated by the first TSN terminal device, or the third PDU The service information 2 transmitted by the session does not need to be transmitted to the first TSN terminal device.

If the TSN terminal device that generates the service information 2 and the first TSN terminal device are connected to different ports, the first port is different from the port used to transmit the service information 2. Therefore, the third PDU session cannot be used to transmit the first service information. In this case, the terminal device cannot determine the first PDU session from the established sessions, and the terminal device can request the establishment of the first PDU session by sending a second PDU session establishment request to the session management network element. It should be noted that the rest of the execution process of step S707 can be referred to the specific description of step S205 in FIG. 2, which will not be repeated here.

In an implementation manner, if the TSN terminal device that generates the service information 2 and the first TSN terminal device are connected to the same port, the first port and the port used to transmit the service information 2 may be the same. In this case, the terminal device may determine the third PDU session as the first PDU session.

Step S708: The terminal device receives a second PDU session establishment response message from the session management network element, where the second PDU session establishment response message is used to indicate that the first PDU session is successfully established.

Specifically, after receiving the second PDU session establishment request, the session management network element may establish the first PDU session. And send a second PDU session establishment response message to the terminal device.

In an implementation manner, after the terminal device determines that the first PDU session is successfully established, the corresponding relationship between the first PDU session and the identification information of the first TSN terminal device can be stored, so that the terminal device can subsequently obtain and use the corresponding relationship .

In this embodiment of the application, when the identification information of the TSN terminal device corresponding to the third PDU session is different from the identification information of the first TSN terminal device, that is, the terminal device cannot determine the first PDU session from the established session, the terminal The device may send a second PDU session establishment request to the session management network element to request a new first PDU session.

Please refer to FIG. 8, which is a schematic flowchart of another session processing method provided by an embodiment of the present application. This method describes in detail how the terminal device creates a first PDU session when there is no session whose attribute information matches the routing descriptor in the established session. Among them, the execution subject of step S801, step S804 to step S806 is the terminal device, or the chip in the terminal device, the execution subject of step S802 to step S803 is the policy control network element, or the chip in the policy control network element, as follows Take the terminal device and the policy control network element as the execution subject of the session processing method as an example for description. As shown in Figure 8, the method may include but is not limited to the following steps:

Step S801: The terminal device determines to transmit the first service information through the first port of the TSN conversion device.

Step S802: The policy control network element generates a URSP.

Step S803: The policy control network element sends the URSP to the terminal device.

Step S804: The terminal device determines a URSP rule according to the URSP, and the URSP rule includes a flow descriptor and a routing descriptor corresponding to the flow descriptor.

It should be noted that the execution process of step S801 to step S803 can be referred to the specific description of step S201 to step S203 in FIG. 2 respectively, and the execution process of step S804 can be referred to the specific description of step S304 in FIG. 3, which will not be repeated here.

Step S805: If the traffic descriptor matches the first port, and there is no session whose attribute information matches the routing descriptor in the established session, the terminal device sends a third PDU session establishment request to the session management network element , The third PDU session establishment request is used to request the establishment of a first PDU session, the third PDU session establishment request includes the routing descriptor; the first PDU session is used to transmit the aforementioned first service information; the first PDU session Different from the PDU session used to transmit the second service information, the second service information is transmitted through the second port; the second port has a topological connection relationship with the terminal device.

Wherein, the traffic descriptor may include port identification information. The matching of the flow descriptor with the first port may mean that the identification information of the port included in the flow descriptor is the same as the identification information of the first port, that is, the port indicated by the identification information included in the flow descriptor is the same as the first port. Optionally, the traffic descriptor may include identification information of the TSN terminal device. The matching of the flow descriptor with the first port may mean: the identification information of the TSN terminal device included in the flow descriptor is the same as the identification information of the first TSN terminal device, that is, the TSN terminal device indicated by the identification information included in the flow descriptor and the first port A TSN terminal equipment is the same. There is a topological connection relationship between the first TSN terminal device and the first port.

When there is no session whose attribute information matches the routing descriptor in the established session, the terminal device cannot determine the first PDU session from the established session. At this time, a third PDU session establishment request carrying the routing descriptor may be sent to the session management network element to request the establishment of the first PDU session whose attribute information matches the routing descriptor. Wherein, the routing descriptor includes the identification information of the port or the identification information of the TSN terminal device. In this way, it is convenient for the terminal device to determine the correspondence between the PDU session and the identification information of the port, or the correspondence between the PDU session and the identification information of the TSN terminal device. Specifically, the routing descriptor may also include S-NSSAI and/or DNN.

Step S806: The terminal device receives a third PDU session establishment response message from the session management network element, the third PDU session establishment response message includes the routing descriptor, and the third PDU session establishment response message is used to indicate the first The PDU session is successfully established; where the routing descriptor includes the identification information of the port or the identification information of the TSN terminal device.

Specifically, after receiving the third PDU session establishment request, the session management network element may establish the first PDU session according to the routing descriptor carried in the third PDU session establishment request. Specifically, the routing descriptor may include not only port identification information or TSN terminal device identification information, but also S-NSSAI and/or DNN. The attribute information of the newly created first PDU session may be the same as the routing descriptor. Optionally, the attribute information of the newly created first PDU session may include other session attribute information in addition to the routing descriptor. For example, when the routing descriptor includes DNN1 and port 1, the attribute information of the newly created first PDU session may include SSC mode 1 in addition to DNN1 and port 1. Optionally, the third PDU session establishment response message sent by the session management network element may include the routing descriptor or attribute information of the newly created first PDU session.

In an implementation manner, when the routing descriptor includes the identification information of the port, after the terminal device determines that the first PDU session is successfully established, it can store the identification information between the first PDU session and the port (ie, the first port) The corresponding relationship, so that the terminal device can subsequently obtain and use the corresponding relationship. When the routing descriptor includes the identification information of the TSN terminal device, after the terminal device determines that the first PDU session is successfully established, it can store the first PDU session and the TSN terminal device (the TSN terminal device has a topological connection with the first port) The corresponding relationship between the identification information, so that the terminal device can subsequently obtain and use the corresponding relationship.

In the embodiment of the present application, when there is no session whose attribute information matches the routing descriptor in the established session, the terminal device cannot determine the first PDU session from the established session. At this time, a third PDU session establishment request carrying the routing descriptor may be sent to the session management network element to request the establishment of the first PDU session whose attribute information matches the routing descriptor.

Please refer to FIG. 9, which is a schematic flowchart of another session processing method provided by an embodiment of the present application. This method describes in detail how the terminal device determines the first PDU session according to the correspondence between the PDU session and the identification information of the port. Among them, the execution subject of step S901, step S904 to step S908 is the terminal device, or the chip in the terminal device, the execution subject of step S902 to step S903 is the policy control network element, or the chip in the policy control network element, as follows Take the terminal device and the policy control network element as the execution subject of the session processing method as an example for description. As shown in Figure 9, the method may include but is not limited to the following steps:

Step S901: The terminal device determines to transmit the first service information through the first port of the TSN conversion device.

Step S902: The policy control network element generates a URSP.

Step S903: The policy control network element sends the URSP to the terminal device.

Step S904: The terminal device determines a URSP rule according to the URSP, and the URSP rule includes a flow descriptor and a routing descriptor corresponding to the flow descriptor.

It should be noted that the execution process of step S901 to step S903 can be referred to the specific description of step S201 to step S203 in FIG. 2 respectively, and the execution process of step S904 can be referred to the specific description of step S304 in FIG. 3, which will not be repeated here.

Step S905: The terminal device determines the flow descriptor of the aforementioned first service information.

Specifically, the terminal device may determine its traffic descriptor according to the characteristics of the first service information. Optionally, the first service information may trigger an application in the terminal device, and the terminal device may use the flow descriptor of the application as the flow descriptor of the first service information. The terminal device may obtain the flow descriptor of the application when obtaining the installation information of the application from the application server.

Step S906: If the flow descriptor of the first service information is the same as the flow descriptor included in the URSP rule, the terminal device determines a fourth PDU session whose attribute information matches the routing descriptor in the established session.

The flow descriptor of the first service information is the same as the flow descriptor included in the URSP rule, which can indicate that the URSP rule matches the first service information. At this time, the terminal device can determine the application through the routing descriptor in the URSP rule. The first PDU session for transmitting the first service information. Specifically, the terminal device may determine the fourth PDU session whose attribute information matches the routing descriptor in the established session, and then determine the first PDU session according to the fourth PDU session.

Step S907: The terminal device obtains the identification information of the port corresponding to the fourth PDU session.

In the embodiment of the present application, after each terminal device establishes a PDU session (including the fourth PDU session) for transmitting service information, the corresponding relationship between the PDU session and the identification information of the port for transmitting the service information may be stored. So that the terminal device can subsequently obtain and use the corresponding relationship.

Step S908: If the identification information of the port corresponding to the fourth PDU session is the same as the identification information of the first port, the terminal device regards the fourth PDU session as the first PDU session; the first PDU session is used to transmit the aforementioned first service Information; the first PDU session is different from the PDU session used to transmit second service information, the second service information is transmitted through a second port; the second port has a topological connection with the terminal device.

The identification information of the port corresponding to the fourth PDU session is the same as the identification information of the first port, which may indicate that the service information 3 transmitted in the fourth PDU session may be transmitted to the first TSN conversion device through the first port, or the fourth PDU The service information 3 transmitted in the session can be transmitted to the first TSN terminal device connected to the first TSN conversion device through the first port, or the service information 3 transmitted in the fourth PDU session can be transmitted to the first TSN through the first port The next hop TSN device of the conversion device. Therefore, the service information 3 and the first service information are transmitted through the same port (ie, the first port). The service information transmitted through the same port can share the same PDU session. Therefore, the terminal device can use the fourth PDU session as the first PDU session. In this way, new service information (first service information) can be transmitted through the fourth PDU session, and by reusing the fourth PDU session, it is beneficial to save resources. It should be noted that the rest of the execution process of step S908 can be referred to the specific description of step S205 in FIG. 2, which will not be repeated here.

By implementing the embodiments of the present application, when the identification information of the port corresponding to the fourth PDU session is the same as the identification information of the first port, new service information (first service information) can be transmitted through the fourth PDU session, and through Reusing the fourth PDU session is conducive to saving resources.

Please refer to FIG. 10, which is a schematic flowchart of another session processing method provided by an embodiment of the present application. Among them, step S1001, step S1004 to step S1009 are executed by the terminal device, or the chip in the terminal device, and the execution subject of step S1002 to step S1003 is the policy control network element, or the chip in the policy control network element, as follows Take the terminal device and the policy control network element as the execution subject of the session processing method as an example for description. As shown in Figure 10, the method may include but is not limited to the following steps:

Step S1001: The terminal device determines to transmit the first service information through the first port of the TSN conversion device.

Step S1002: The policy control network element generates a URSP.

Step S1003: The policy control network element sends the URSP to the terminal device.

Step S1004: The terminal device determines a URSP rule according to the URSP, and the URSP rule includes a flow descriptor and a routing descriptor corresponding to the flow descriptor.

Step S1005: The terminal device determines the flow descriptor of the aforementioned first service information.

Step S1006: If the flow descriptor of the first service information is the same as the flow descriptor included in the URSP rule, the terminal device determines a fourth PDU session whose attribute information matches the routing descriptor in the established session.

Step S1007: The terminal device obtains the identification information of the port corresponding to the fourth PDU session.

It should be noted that the execution process of step S1001 to step S1003 can be referred to the specific description of step S201 to step S203 in FIG. 2 respectively, and the execution process of step S1004 can be referred to the specific description of step S304 in FIG. For the execution process, please refer to the specific description of step S905 to step S907 in FIG. 9 respectively, which will not be repeated here.

Step S1008: If the identification information of the port corresponding to the fourth PDU session is different from the identification information of the first port, the terminal device sends a fourth PDU session establishment request to the session management network element, and the fourth PDU session establishment request is used to request Establish a first PDU session; the first PDU session is used to transmit the aforementioned first service information; the first PDU session is different from the PDU session used to transmit the second service information, and the second service information is transmitted through the second port; the The second port has a topological connection relationship with the terminal device.

The difference between the identification information of the port corresponding to the fourth PDU session and the identification information of the first port may indicate that the service information 3 and the first service information transmitted in the fourth PDU session are transmitted through different ports. In this case, the terminal device cannot determine the first PDU session from the established sessions, and the terminal device may request the establishment of the first PDU session by sending a fourth PDU session establishment request to the session management network element. It should be noted that the rest of the execution process of step S1008 can be referred to the specific description of step S205 in FIG. 2, which will not be repeated here.

Step S1009: The terminal device receives a fourth PDU session establishment response message from the session management network element, where the fourth PDU session establishment response message is used to indicate that the first PDU session is successfully established.

Specifically, after receiving the fourth PDU session establishment request, the session management network element may establish the first PDU session. And send a fourth PDU session establishment response message to the terminal device.

In the embodiment of the present application, when the identification information of the port corresponding to the fourth PDU session is different from the identification information of the first port, that is, the terminal device cannot determine the first PDU session from the established session, the terminal device can pass the The session management network element sends a fourth PDU session establishment request to request a new first PDU session.

Please refer to FIG. 11, which is a schematic flowchart of yet another session processing method provided by an embodiment of the present application. How the terminal device determines the first PDU session according to the correspondence between the PDU session and the identification information of the TSN terminal device. Among them, the execution subject of step S1101 and step S1104 to step S1108 is the terminal device, or the chip in the terminal device, the execution subject of step S1102 to step S1103 is the policy control network element, or the chip in the policy control network element, as follows Take the terminal device and the policy control network element as the execution subject of the session processing method as an example for description. As shown in Figure 11, the method may include but is not limited to the following steps:

Step S1101: The terminal device determines to transmit the first service information through the first port of the TSN conversion device.

Step S1102: The policy control network element generates a URSP.

Step S1103: The policy control network element sends the URSP to the terminal device.

Step S1104: The terminal device determines a URSP rule according to the URSP, and the URSP rule includes a flow descriptor and a routing descriptor corresponding to the flow descriptor.

It should be noted that the execution process of step S1101 to step S1103 can be referred to the specific description of step S201 to step S203 in FIG. 2 respectively, and the execution process of step S1104 can be referred to the specific description of step S304 in FIG. 3, which will not be repeated here.

Step S1105: The terminal device determines the flow descriptor of the foregoing first service information.

Step S1106: If the flow descriptor of the first service information is the same as the flow descriptor included in the URSP rule, the terminal device determines the fifth PDU session whose attribute information matches the routing descriptor in the established session.

For the execution process of step S1106, please refer to the specific description of step S906 in FIG. 9, which will not be repeated here.

Step S1107: The terminal device obtains the identification information of the TSN terminal device corresponding to the fifth PDU session.

The identification information of the TSN terminal device corresponding to the fifth PDU session can be used to indicate: the source address or destination address information corresponding to the service information (such as service information 4) transmitted by the fifth PDU session, that is, the TSN terminal corresponding to the fifth PDU session The device may be the TSN terminal device that generates the service information 4, or it may be the destination TSN terminal device that the service information 4 reaches. In the embodiment of the present application, after each terminal device establishes a PDU session (including the fifth PDU session) for transmitting service information, it can store the source address or destination of the PDU session and the service information 4 transmitted by the PDU session. The corresponding relationship between the address information (that is, the identification information of the TSN terminal device), so that the terminal device can subsequently obtain and use the corresponding relationship.

Step S1108: If the identification information of the TSN terminal device corresponding to the fifth PDU session is the same as the identification information of the first TSN terminal device, the terminal device regards the fifth PDU session as the first PDU session; the first PDU session is used for transmission The foregoing first service information; the first PDU session is different from the PDU session used to transmit the second service information, and the second service information is transmitted through the second port; the second port has a topological connection with the terminal device; first There is a topological connection relationship between the TSN terminal device and the first port.

The identification information of the TSN terminal device corresponding to the fifth PDU session is the same as the identification information of the first TSN terminal device, which may indicate that the service information 4 and the first service information transmitted in the fifth PDU session are both generated by the first TSN terminal device. Or, both the service information 4 and the first service information transmitted in the fifth PDU session need to be transmitted to the first TSN terminal device. Therefore, the service information 4 and the first service information will be transmitted through the same port (ie, the first port). Service information transmitted through the same port can share the same PDU session. Therefore, the terminal device can use the fifth PDU session as the first PDU session. In this way, new service information (first service information) can be transmitted through the fifth PDU session, and by reusing the fifth PDU session, it is beneficial to save resources. It should be noted that, for the rest of the execution process of step S1108, refer to the specific description of step S205 in FIG. 2, which will not be repeated here.

By implementing the embodiments of this application, when the identification information of the TSN terminal device corresponding to the fifth PDU session is the same as the identification information of the first TSN terminal device, new service information (first service information) can be transmitted through the fifth PDU session. Information), by reusing the fifth PDU session, it is helpful to save resources.

Please refer to FIG. 12, which is a schematic flowchart of another session processing method provided by an embodiment of the present application. Among them, step S1201, step S1204 to step S1209 are executed by the terminal device, or the chip in the terminal device, the execution subject of step S1202 to step S1203 is the policy control network element, or the chip in the policy control network element, as follows Take the terminal device and the policy control network element as the execution subject of the session processing method as an example for description. As shown in Figure 12, the method may include but is not limited to the following steps:

Step S1201: The terminal device determines to transmit the first service information through the first port of the TSN conversion device.

Step S1202: The policy control network element generates a URSP.

Step S1203: The policy control network element sends the URSP to the terminal device.

Step S1204: The terminal device determines a URSP rule according to the URSP, and the URSP rule includes a flow descriptor and a routing descriptor corresponding to the flow descriptor.

Step S1205: The terminal device determines the flow descriptor of the aforementioned first service information.

Step S1206: If the flow descriptor of the first service information is the same as the flow descriptor included in the URSP rule, the terminal device determines a fifth PDU session whose attribute information matches the routing descriptor in the established session.

Step S1207: The terminal device obtains the identification information of the TSN terminal device corresponding to the fifth PDU session.

It should be noted that the execution process of step S1201 to step S1203 can be referred to the specific description of step S201 to step S203 in FIG. 2 respectively, and the execution process of step S1204 can be referred to the specific description of step S304 in FIG. For the execution process, please refer to the specific description of step S1105 to step S1107 in FIG. 11 respectively, which will not be repeated here.

Step S1208: If the identification information of the TSN terminal device corresponding to the fifth PDU session is different from the identification information of the first TSN terminal device, the terminal device sends a fifth PDU session establishment request to the session management network element, and the fifth PDU session is established The request is used to request the establishment of the first PDU session; the first PDU session is used to transmit the aforementioned first service information; the first PDU session is different from the PDU session used to transmit the second service information, and the second service information passes through the second Port transmission; the second port has a topological connection relationship with the terminal device; wherein, the first TSN terminal device has a topological connection relationship with the first port.

The difference between the identification information of the TSN terminal device corresponding to the fifth PDU session and the identification information of the first TSN terminal device may indicate that the service information 4 transmitted in the fifth PDU session is not generated by the first TSN terminal device, or the fifth PDU The service information 4 transmitted by the session does not need to be transmitted to the first TSN terminal device.

If the TSN terminal device that generates the service information 4 and the first TSN terminal device are connected to different ports, the first port is different from the port used to transmit the service information 4. In this case, the terminal device cannot determine the first PDU session from the established sessions, and the terminal device may request the establishment of the first PDU session by sending a fifth PDU session establishment request to the session management network element. It should be noted that, for the rest of the execution process of step S1208, please refer to the specific description of step S205 in FIG. 2, which will not be repeated here.

In an implementation manner, if the TSN terminal device that generates the service information 4 and the first TSN terminal device are connected to the same port, the first port and the port used to transmit the service information 4 may be the same. In this case, the terminal device may determine the fifth PDU session as the first PDU session.

Step S1209: The terminal device receives a fifth PDU session establishment response message from the session management network element, where the fifth PDU session establishment response message is used to indicate that the first PDU session is successfully established.

Specifically, after receiving the fifth PDU session establishment request, the session management network element may establish the first PDU session. And send a fifth PDU session establishment response message to the terminal device.

In this embodiment of the application, when the identification information of the TSN terminal device corresponding to the fifth PDU session is different from the identification information of the first TSN terminal device, that is, the terminal device cannot determine the first PDU session from the established session, the terminal The device may send a fifth PDU session establishment request to the session management network element to request the creation of the first PDU session.

In the above-mentioned embodiments provided in the present application, the methods provided in the embodiments of the present application are introduced from the perspectives of terminal devices, policy control network elements, and session management network elements, respectively. In order to implement the functions in the method provided in the above embodiments of the application, the terminal device, the policy control network element, and the session management network element may include a hardware structure and a software module, in the form of a hardware structure, a software module, or a hardware structure plus a software module To achieve the above functions. One of the above-mentioned functions can be executed in a hardware structure, a software module, or a hardware structure plus a software module.

Please refer to FIG. 13, which is a schematic structural diagram of a communication device 130 provided by an embodiment of this application. The communication device 130 shown in FIG. 13 may include a transceiver module 1301 and a processing module 1302. The transceiver module 1301 may include a sending module and/or a receiving module. The sending module is used to realize the sending function, the receiving module is used to realize the receiving function, and the sending and receiving module 1301 may realize the sending function and/or the receiving function. The transceiver module can also be described as a communication module.

The communication device 130 may be a terminal device, a device in a terminal device, or a device that can be matched and used with the terminal device. Alternatively, the communication device 130 may be a policy control network element, a device in a policy control network element, or a device that can be matched and used with a policy control network element. Alternatively, the communication device 130 may be a session management network element, a device in a session management network element, or a device that can be matched and used with the session management network element.

The communication device 130 is a terminal device: the transceiver module 1301 is used to receive the URSP from the policy control network element; the processing module 1302 is used to determine that the first service information is transmitted through the first port of the TSN conversion device; according to the information received from the policy control network element URSP, determine the URSP rule; and determine the first PDU session according to the URSP rule, the first PDU session is used to transmit the first service information; the first PDU session is different from the PDU session used to transmit the second service information, the second Service information is transmitted through the second port; the second port has a topological connection with the communication device 130.

In an implementation manner, the URSP rule includes a flow descriptor and a routing descriptor corresponding to the flow descriptor, and the processing module 1302 is configured to determine the first PDU session according to the URSP rule, which can be specifically used to: If the descriptor matches the first port, the first PDU session is determined according to the routing descriptor and the attribute information of the established session.

In an implementation manner, the routing descriptors corresponding to different traffic descriptors are different; when the processing module 1302 is used to determine the first PDU session according to the routing descriptor and the attribute information of the established session, it can be specifically used to: The first PDU session whose attribute information matches the routing descriptor in the established session is determined.

In an implementation manner, when the processing module 1302 is configured to determine the first PDU session according to the routing descriptor and the attribute information of the established session, it can be specifically used to: determine the attribute information and the routing description in the established session Match the second PDU session; obtain the identification information of the port corresponding to the second PDU session; if the identification information of the port corresponding to the second PDU session is the same as the identification information of the first port, use the second PDU session as The first PDU session.

In an implementation manner, when the processing module 1302 is configured to determine the first PDU session according to the routing descriptor and the attribute information of the established session, it can be specifically used to: determine the attribute information and the routing description in the established session Match the second PDU session; obtain the identification information of the port corresponding to the second PDU session; if the identification information of the port corresponding to the second PDU session is different from the identification information of the first port, the The management network element sends a first PDU session establishment request, which is used to request the establishment of a first PDU session; and receives a first PDU session establishment response message from the session management network element through the transceiver module 1301. The PDU session establishment response message is used to indicate that the first PDU session is successfully established.

In an implementation manner, the processing module 1302 may also be used to store the correspondence between the first PDU session and the identification information of the first port.

In an implementation manner, when the processing module 1302 is configured to determine the first PDU session according to the routing descriptor and the attribute information of the established session, it can be specifically used to: determine the attribute information in the established session and the foregoing routing description Match the third PDU session; obtain the identification information of the TSN terminal device corresponding to the third PDU session; if the identification information of the TSN terminal device corresponding to the third PDU session is the same as the identification information of the first TSN terminal device, then The third PDU session is regarded as the first PDU session; wherein, the first TSN terminal device has a topological connection relationship with the first port.

In an implementation manner, when the processing module 1302 is configured to determine the first PDU session according to the routing descriptor and the attribute information of the established session, it can be specifically used to: determine the attribute information in the established session and the foregoing routing description Match the third PDU session; obtain the identification information of the TSN terminal device corresponding to the third PDU session; if the identification information of the TSN terminal device corresponding to the third PDU session is different from the identification information of the first TSN terminal device, then Send a second PDU session establishment request to the session management network element through the transceiver module 1301, the second PDU session establishment request is used to request the establishment of the first PDU session; wherein the first TSN terminal device has a topological connection with the first port; and The second PDU session establishment response message from the session management network element is received through the transceiver module 1301, and the second PDU session establishment response message is used to indicate that the first PDU session is successfully established.

In an implementation manner, the processing module 1302 may also be used to store the correspondence between the first PDU session and the identification information of the first TSN terminal device.

In an implementation manner, when the processing module 1302 is configured to determine the first PDU session according to the routing descriptor and the attribute information of the established session, it can be specifically used to: if the attribute information and the aforementioned routing selection do not exist in the established session For the session that matches the descriptor, a third PDU session establishment request is sent to the session management network element through the transceiver module 1301. The third PDU session establishment request is used to request the establishment of the first PDU session, and the third PDU session establishment request includes the route. Selection descriptor; the third PDU session establishment response message from the session management network element is received through the transceiver module 1301, the third PDU session establishment response message includes the routing descriptor, and the third PDU session establishment response message is used to indicate the first The PDU session is successfully established; where the routing descriptor includes the identification information of the port or the identification information of the TSN terminal device.

In an implementation manner, the URSP rule includes a flow descriptor and a routing descriptor corresponding to the flow descriptor; when the processing module 1302 is used to determine the first PDU session according to the URSP rule, it can be specifically used to: determine the first The flow descriptor of the service information; if the flow descriptor of the first service information is the same as the flow descriptor included in the URSP rule, determine the fourth PDU session whose attribute information matches the routing descriptor in the established session; Obtain the identification information of the port corresponding to the fourth PDU session; if the identification information of the port corresponding to the fourth PDU session is the same as the identification information of the first port, the fourth PDU session is regarded as the first PDU session.

In an implementation manner, the URSP rule includes a flow descriptor and a routing descriptor corresponding to the flow descriptor; when the processing module 1302 is used to determine the first PDU session according to the URSP rule, it can be specifically used to: determine the first The flow descriptor of the service information; if the flow descriptor of the first service information is the same as the flow descriptor included in the URSP rule, determine the fourth PDU session whose attribute information matches the routing descriptor in the established session; Obtain the identification information of the port corresponding to the fourth PDU session; if the identification information of the port corresponding to the fourth PDU session is different from the identification information of the first port, the fourth PDU session establishment is sent to the session management network element through the transceiver module 1301 Request, the fourth PDU session establishment request is used to request the establishment of the first PDU session; and the fourth PDU session establishment response message from the session management network element is received through the transceiver module 1301, and the fourth PDU session establishment response message is used to indicate the first PDU session establishment response message. A PDU session is successfully established.

In an implementation manner, the URSP rule includes a flow descriptor and a routing descriptor corresponding to the flow descriptor; when the processing module 1302 is used to determine the first PDU session according to the URSP rule, it can be specifically used to: determine the first The flow descriptor of the service information; if the flow descriptor of the first service information is the same as the flow descriptor included in the URSP rule, determine the fifth PDU session whose attribute information matches the routing descriptor in the established session; Acquire the identification information of the TSN terminal device corresponding to the fifth PDU session; if the identification information of the TSN terminal device corresponding to the fifth PDU session is the same as the identification information of the first TSN terminal device, the fifth PDU session is regarded as the first PDU Session; wherein, the first TSN terminal device and the first port have a topological connection relationship.

In an implementation manner, the URSP rule includes a flow descriptor and a routing descriptor corresponding to the flow descriptor; when the processing module 1302 is used to determine the first PDU session according to the URSP rule, it can be specifically used to: determine the first The flow descriptor of the service information; if the flow descriptor of the first service information is the same as the flow descriptor included in the URSP rule, determine the fifth PDU session whose attribute information matches the routing descriptor in the established session; Obtain the identification information of the TSN terminal device corresponding to the fifth PDU session; if the identification information of the TSN terminal device corresponding to the fifth PDU session is different from the identification information of the first TSN terminal device, send a message to the session management network element through the transceiver module 1301 Send the fifth PDU session establishment request, the fifth PDU session establishment request is used to request the establishment of the first PDU session; wherein, the first TSN terminal device and the first port have a topological connection relationship; and the transceiver module 1301 receives from the session management network element The fifth PDU session establishment response message is used to indicate that the first PDU session is successfully established.

The communication device 130 is a policy control network element: the processing module 1302 is used to generate a URSP; the transceiver module 1301 is used to send the URSP to the terminal device. The URSP rule in the URSP includes a flow descriptor and a corresponding flow descriptor. Routing descriptor: The flow descriptor includes the identification information of the port or the identification information of the TSN terminal device.

The communication device 130 is a session management network element: the transceiver module 1301 is used to receive a PDU session establishment request (such as the aforementioned third PDU session establishment request) from a terminal device. The PDU session establishment request is used to request the establishment of the first PDU session. The PDU session establishment request includes a routing descriptor; the processing module 1302 is used to establish a first PDU session according to the routing descriptor; the transceiver module 1301 is also used to send a PDU session establishment response message to the terminal device (such as the aforementioned third PDU Session establishment response message), the PDU session establishment response message includes a routing descriptor, and the PDU session establishment response message is used to indicate that the first PDU session is successfully established; wherein, the routing descriptor includes port identification information or TSN terminal equipment的identification information.

Please refer to FIG. 14, which is a schematic structural diagram of another communication device 140 according to an embodiment of the present application. The communication device 140 may be a terminal device, a policy control network element, a session management network element, a chip, a chip system, or a processor that supports the terminal device to implement the above method, or a policy control network element. The chip, chip system, or processor that the network element implements the foregoing method may also be a chip, chip system, or processor that supports the session management network element to implement the foregoing method. The device can be used to implement the method described in the foregoing method embodiment, and for details, please refer to the description in the foregoing method embodiment.

The communication device 140 may include one or more processors 1401. The processor 1401 may be a general-purpose processor, a special-purpose processor, or the like. For example, it can be a baseband processor or a central processing unit. The baseband processor can be used to process communication protocols and communication data, and the central processor can be used to control communication devices (such as base stations, baseband chips, terminals, terminal chips, DU or CU, etc.), execute computer programs, and process Computer program data.

Optionally, the communication device 140 may include one or more memories 1402, on which a computer program 1404 may be stored, and the computer program may be executed on the communication device 140, so that the communication device 140 executes the method described in the foregoing method embodiments. Methods. Optionally, the memory 1402 may also store data. The communication device 140 and the memory 1402 can be provided separately or integrated together.

Optionally, the communication device 140 may further include a transceiver 1405 and an antenna 1406. The transceiver 1405 may be called a transceiver unit, a transceiver, or a transceiver circuit, etc., for implementing the transceiver function. The transceiver 1405 may include a receiver and a transmitter. The receiver may be referred to as a receiver or a receiving circuit, etc., for implementing a receiving function; the transmitter may be referred to as a transmitter or a transmitting circuit, etc., for implementing a transmitting function.

Optionally, the communication device 140 may further include one or more interface circuits 1407. The interface circuit 1407 is used to receive code instructions and transmit them to the processor 1401. The processor 1401 runs the code instructions to make the communication device 140 execute the method described in the foregoing method embodiment.

The communication device 140 is a terminal device: the processor 1401 is used to execute step S201, step S204 to step S205 in FIG. 2; it is used to execute step S301, step S304 to step S305 in FIG. 3; it is used to execute the steps in FIG. S401, step S404 to step S407; used to perform step S501, step S504 to step S506 in FIG. 5; used to perform step S601, step S604 to step S607 in FIG. 6; used to perform step S701, step S701 in FIG. Step S704~Step S706; used to perform step S801 and step S804 in Fig. 8; used to perform step S901, step S904~step S908 in Fig. 9; used to perform step S1001, step S1004~step S1007 in Fig. 10 ; Used to perform step S1101 in FIG. 11, step S1104 to step S1108; or used to perform step S1201 in FIG. 12, step S1204 to step S1207. The transceiver 1405 is used to perform steps S507 to S508 in FIG. 5; used to perform steps S707 to S708 in FIG. 7; used to perform steps S805 to S806 in FIG. 8; and used to perform steps in FIG. 10 S1008 to step S1009; or used to execute step S1208 to step S1209 in FIG. 12.

The communication device 140 is a policy control network element: the processor 1401 is used to perform step S202 in FIG. 2; used to perform step S302 in FIG. 3; used to perform step S402 in FIG. 4; S502; used to perform step S602 in Figure 6; used to perform step S702 in Figure 7; used to perform step S802 in Figure 8; used to perform step S902 in Figure 9; used to perform step S902 in Figure 10 S1002; used to perform step S1102 in FIG. 11; or used to perform step S1202 in FIG. 12. The transceiver 1405 is used to perform step S203 in Figure 2; used to perform step S303 in Figure 3; used to perform step S403 in Figure 4; used to perform step S503 in Figure 5; used to perform step S503 in Figure 6 Step S603; used to perform step S703 in Figure 7; used to perform step S803 in Figure 8; used to perform step S903 in Figure 9; used to perform step S1003 in Figure 10; used to perform step S1003 in Figure 11 Step S1103; or used to execute step S1203 in FIG. 12.

The communication device 140 is a session management network element: the transceiver 1405 is configured to receive a PDU session establishment request (such as the aforementioned third PDU session establishment request) from a terminal device, and the PDU session establishment request is used to request the establishment of a first PDU session. The PDU session establishment request includes a routing descriptor; the processor 1401 is configured to execute the establishment of a first PDU session according to the routing descriptor; the transceiver 1405 is also configured to execute sending a PDU session establishment response message to the terminal device (such as the aforementioned third PDU Session establishment response message), the PDU session establishment response message includes a routing descriptor, and the PDU session establishment response message is used to indicate that the first PDU session is successfully established; wherein, the routing descriptor includes port identification information or TSN terminal equipment的identification information.

In an implementation manner, the processor 1401 may include a transceiver for implementing receiving and sending functions. For example, the transceiver may be a transceiver circuit, or an interface, or an interface circuit. The transceiver circuits, interfaces, or interface circuits used to implement the receiving and transmitting functions can be separate or integrated. The foregoing transceiver circuit, interface, or interface circuit can be used for code/data reading and writing, or the foregoing transceiver circuit, interface, or interface circuit can be used for signal transmission or transmission.

In an implementation manner, the processor 1401 may store a computer program 1403, and the computer program 1403 runs on the processor 1401 to enable the communication device 140 to execute the method described in the foregoing method embodiment. The computer program 1403 may be solidified in the processor 1401. In this case, the processor 1401 may be implemented by hardware.

In an implementation manner, the communication device 140 may include a circuit, and the circuit may implement the sending or receiving or communication function in the foregoing method embodiment. The processor and transceiver described in this application can be implemented in integrated circuit (IC), analog IC, radio frequency integrated circuit RFIC, mixed signal IC, application specific integrated circuit (ASIC), printed circuit board ( printed circuit board, PCB), electronic equipment, etc. The processor and transceiver can also be manufactured by various IC process technologies, such as complementary metal oxide semiconductor (CMOS), nMetal-oxide-semiconductor (NMOS), P-type Metal oxide semiconductor (positive channel metal oxide semiconductor, PMOS), bipolar junction transistor (BJT), bipolar CMOS (BiCMOS), silicon germanium (SiGe), gallium arsenide (GaAs), etc.

The communication device described in the above embodiment may be a terminal device, a policy control network element, or a session management network element, but the scope of the communication device described in this application is not limited to this, and the structure of the communication device may be Not limited by Figure 14. The communication device may be a stand-alone device or may be part of a larger device. For example, the communication device may be:

(1) Independent integrated circuit IC, or chip, or chip system or subsystem;

(2) A collection of one or more ICs. Optionally, the IC collection may also include storage components for storing data and computer programs;

(3) ASIC, such as a modem (Modem);

(4) Modules that can be embedded in other equipment;

(5) Receivers, terminals, smart terminals, cellular phones, wireless devices, handhelds, mobile units, vehicle-mounted devices, network devices, cloud devices, artificial intelligence devices, etc.;

(6) Others, etc.

For the case where the communication device can be a chip or a chip system, refer to the schematic diagram of the chip structure shown in FIG. 15. The chip shown in FIG. 15 includes a processor 1501 and an interface 1502. The number of processors 1501 can be one or more, and the number of interfaces 1502 can be more than one.

For the case where the chip is used to implement the function of the terminal device in the embodiment of the present application:

The interface 1502 is used to receive the URSP from the policy control network element; the processor 1501 is used to determine to transmit the first service information through the first port of the TSN conversion device; determine the URSP rule according to the URSP received from the policy control network element; The URSP rule determines a first PDU session, and the first PDU session is used to transmit first service information; the first PDU session is different from the PDU session used to transmit second service information, and the second service information is transmitted through the second port; The second port has a topological connection relationship with the terminal device.

In an implementation manner, the URSP rule includes a flow descriptor and a routing descriptor corresponding to the flow descriptor. When the processor 1501 is configured to determine the first PDU session according to the URSP rule, it can be specifically used to: If the descriptor matches the first port, the first PDU session is determined according to the routing descriptor and the attribute information of the established session.

In an implementation manner, the routing descriptors corresponding to different traffic descriptors are different; when the processor 1501 is configured to determine the first PDU session according to the routing descriptor and the attribute information of the established session, it can be specifically used to: The first PDU session whose attribute information matches the routing descriptor in the established session is determined.

In an implementation manner, when the processor 1501 is configured to determine the first PDU session according to the routing descriptor and the attribute information of the established session, it may be specifically used to: determine the attribute information and the routing description in the established session Match the second PDU session; obtain the identification information of the port corresponding to the second PDU session; if the identification information of the port corresponding to the second PDU session is the same as the identification information of the first port, use the second PDU session as The first PDU session.

In an implementation manner, when the processor 1501 is configured to determine the first PDU session according to the routing descriptor and the attribute information of the established session, it may be specifically used to: determine the attribute information and the routing description in the established session The second PDU session that matches the second PDU session; obtain the identification information of the port corresponding to the second PDU session; if the identification information of the port corresponding to the second PDU session is different from the identification information of the first port, the interface 1502 is used to manage the session The network element sends a first PDU session establishment request, which is used to request the establishment of a first PDU session; and receives a first PDU session establishment response message from the session management network element through the interface 1502, the first PDU session The establishment response message is used to indicate that the first PDU session is successfully established.

In an implementation manner, the processor 1501 may also be configured to store the correspondence between the first PDU session and the identification information of the first port.

In an implementation manner, when the processor 1501 is configured to determine the first PDU session according to the routing descriptor and the attribute information of the established session, it may be specifically used to: determine the attribute information and the foregoing routing description in the established session Match the third PDU session; obtain the identification information of the TSN terminal device corresponding to the third PDU session; if the identification information of the TSN terminal device corresponding to the third PDU session is the same as the identification information of the first TSN terminal device, then The third PDU session is regarded as the first PDU session; wherein, the first TSN terminal device has a topological connection relationship with the first port.

In an implementation manner, when the processor 1501 is configured to determine the first PDU session according to the routing descriptor and the attribute information of the established session, it may be specifically used to: determine the attribute information and the foregoing routing description in the established session Match the third PDU session; obtain the identification information of the TSN terminal device corresponding to the third PDU session; if the identification information of the TSN terminal device corresponding to the third PDU session is different from the identification information of the first TSN terminal device, then Send a second PDU session establishment request to the session management network element through the interface 1502, the second PDU session establishment request is used to request the establishment of the first PDU session; wherein the first TSN terminal device has a topological connection relationship with the first port; and The interface 1502 receives a second PDU session establishment response message from the session management network element, where the second PDU session establishment response message is used to indicate that the first PDU session is successfully established.

In an implementation manner, the processor 1501 may also be configured to store the correspondence between the first PDU session and the identification information of the first TSN terminal device.

In an implementation manner, when the processor 1501 is configured to determine the first PDU session according to the routing descriptor and the attribute information of the established session, it can be specifically used to: if the attribute information and the aforementioned routing selection do not exist in the established session For sessions matching the descriptors, a third PDU session establishment request is sent to the session management network element through the interface 1502. The third PDU session establishment request is used to request the establishment of the first PDU session, and the third PDU session establishment request includes the routing selection. Descriptor; receiving the third PDU session establishment response message from the session management network element through the interface 1502, the third PDU session establishment response message includes the routing descriptor, and the third PDU session establishment response message is used to indicate the first PDU session The establishment is successful; wherein, the routing descriptor includes the identification information of the port or the identification information of the TSN terminal device.

In an implementation manner, the URSP rule includes a flow descriptor and a routing descriptor corresponding to the flow descriptor; when the processor 1501 is configured to determine the first PDU session according to the URSP rule, it may be specifically used to: determine the first The flow descriptor of the service information; if the flow descriptor of the first service information is the same as the flow descriptor included in the URSP rule, determine the fourth PDU session whose attribute information matches the routing descriptor in the established session; Obtain the identification information of the port corresponding to the fourth PDU session; if the identification information of the port corresponding to the fourth PDU session is the same as the identification information of the first port, the fourth PDU session is regarded as the first PDU session.

In an implementation manner, the URSP rule includes a flow descriptor and a routing descriptor corresponding to the flow descriptor; when the processor 1501 is configured to determine the first PDU session according to the URSP rule, it may be specifically used to: determine the first The flow descriptor of the service information; if the flow descriptor of the first service information is the same as the flow descriptor included in the URSP rule, determine the fourth PDU session whose attribute information matches the routing descriptor in the established session; Obtain the identification information of the port corresponding to the fourth PDU session; if the identification information of the port corresponding to the fourth PDU session is different from the identification information of the first port, send a fourth PDU session establishment request to the session management network element through the interface 1502 , The fourth PDU session establishment request is used to request the establishment of the first PDU session; and the fourth PDU session establishment response message from the session management network element is received through the interface 1502, and the fourth PDU session establishment response message is used to indicate the first PDU The session was established successfully.

In an implementation manner, the URSP rule includes a flow descriptor and a routing descriptor corresponding to the flow descriptor; when the processor 1501 is configured to determine the first PDU session according to the URSP rule, it may be specifically used to: determine the first The flow descriptor of the service information; if the flow descriptor of the first service information is the same as the flow descriptor included in the URSP rule, determine the fifth PDU session whose attribute information matches the routing descriptor in the established session; Acquire the identification information of the TSN terminal device corresponding to the fifth PDU session; if the identification information of the TSN terminal device corresponding to the fifth PDU session is the same as the identification information of the first TSN terminal device, the fifth PDU session is regarded as the first PDU Session; wherein, the first TSN terminal device and the first port have a topological connection relationship.

In an implementation manner, the URSP rule includes a flow descriptor and a routing descriptor corresponding to the flow descriptor; when the processor 1501 is configured to determine the first PDU session according to the URSP rule, it may be specifically used to: determine the first The flow descriptor of the service information; if the flow descriptor of the first service information is the same as the flow descriptor included in the URSP rule, determine the fifth PDU session whose attribute information matches the routing descriptor in the established session; Obtain the identification information of the TSN terminal device corresponding to the fifth PDU session; if the identification information of the TSN terminal device corresponding to the fifth PDU session is different from the identification information of the first TSN terminal device, send it to the session management network element through the interface 1502 The fifth PDU session establishment request, the fifth PDU session establishment request is used to request the establishment of the first PDU session; wherein, the first TSN terminal device has a topological connection relationship with the first port; and the first TSN terminal device is connected to the first port through the interface 1502. A fifth PDU session establishment response message, where the fifth PDU session establishment response message is used to indicate that the first PDU session is successfully established.

For the case where the chip is used to implement the function of the policy control network element in the embodiment of the present application:

The processor 1501 is configured to generate a URSP; the interface 1502 is configured to send the URSP to a terminal device. The URSP rule in the URSP includes a flow descriptor and a routing descriptor corresponding to the flow descriptor; the flow descriptor includes The identification information of the port or the identification information of the TSN terminal device.

For the case where the chip is used to implement the function of the session management network element in the embodiment of the present application:

The interface 1502 is configured to receive a PDU session establishment request (such as the aforementioned third PDU session establishment request) from a terminal device, the PDU session establishment request is used to request the establishment of a first PDU session, and the PDU session establishment request includes a routing descriptor; The processor 1501 is configured to establish a first PDU session according to the routing descriptor; the interface 1502 is also configured to send a PDU session establishment response message (such as the aforementioned third PDU session establishment response message) to the terminal device, the PDU session establishment response The message includes a routing descriptor, and the PDU session establishment response message is used to indicate that the first PDU session is successfully established; where the routing descriptor includes port identification information or TSN terminal device identification information.

Optionally, the chip further includes a memory 1503, and the memory 1503 is used to store necessary computer programs and data.

Those skilled in the art may also understand that various illustrative logical blocks and steps listed in the embodiments of the present application can be implemented by electronic hardware, computer software, or a combination of the two. Whether such a function is implemented by hardware or software depends on the specific application and the design requirements of the entire system. Those skilled in the art can use various methods to implement the described functions for each specific application, but such implementation should not be construed as going beyond the protection scope of the embodiments of the present application.

An embodiment of the present application also provides a session processing system, which includes a communication device as a terminal device in the embodiment of FIG. 13 and a communication device as a policy control network element, or the system includes a communication device as a terminal in the embodiment of FIG. The communication device of the device, the communication device as the policy control network element, and the communication device as the session management network element; or, the system includes the communication device as the terminal device in the embodiment of FIG. 14 and the communication device as the policy control network element, Alternatively, the system includes a communication device as a terminal device, a communication device as a policy control network element, and a communication device as a session management network element in the foregoing embodiment of FIG. 14.

The present application also provides a computer-readable storage medium on which a computer program is stored, and when the computer-readable storage medium is executed by a computer, the function of any of the foregoing method embodiments is realized.

This application also provides a computer program product, which, when executed by a computer, realizes the functions of any of the foregoing method embodiments.

In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented by software, it can be implemented in the form of a computer program product in whole or in part. The computer program product includes one or more computer programs. When the computer program is loaded and executed on the computer, the process or function according to the embodiment of the present application is 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 program 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 program may be downloaded from a website, computer, server, or data center. Transmission to another website, computer, server, or data center via wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (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 integrated with one or more 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 high-density digital video disc (digital video disc, DVD)), or a semiconductor medium (for example, a solid state disk, SSD)) etc.

Those of ordinary skill in the art can understand that the various numerical numbers such as first and second involved in the present application are only for easy distinction for description, and are not used to limit the scope of the embodiments of the present application, but also indicate a sequence.

At least one in this application can also be described as one or more, and the multiple can be two, three, four or more, which is not limited in this application. In the embodiments of this application, for a technical feature, the technical feature is distinguished by "first", "second", "third", "A", "B", "C", and "D", etc. For the technical features in “First”, “Second”, “Third”, “A”, “B”, “C” and “D”, there is no order or size order among the technical features.

The corresponding relationships shown in the tables in this application can be configured or pre-defined. The value of the information in each table is only an example, and can be configured to other values, which is not limited in this application. When configuring the correspondence between the information and the parameters, it is not necessarily required to configure all the correspondences indicated in the tables. For example, in the table in this application, the corresponding relationship shown in some rows may not be configured. For another example, appropriate deformation adjustments can be made based on the above table, such as splitting, merging, and so on. The names of the parameters shown in the titles in the above tables may also be other names that can be understood by the communication device, and the values or expressions of the parameters may also be other values or expressions that can be understood by the communication device. When the above tables are implemented, other data structures can also be used, such as arrays, queues, containers, stacks, linear tables, pointers, linked lists, trees, graphs, structures, classes, heaps, hash tables, or hash tables. Wait.

The pre-definition in this application can be understood as definition, pre-definition, storage, pre-storage, pre-negotiation, pre-configuration, curing, or pre-fired.

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.

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 session processing method, characterized in that the method includes:

The terminal device determines to transmit the first service information through the first port of the delay-sensitive network TSN conversion device;

The terminal device determines the URSP rule according to the user routing policy URSP received from the policy control network element;

The terminal device determines a first protocol data unit PDU session according to the URSP rule, where the first PDU session is used to transmit the first service information; the first PDU session is related to the PDU used to transmit the second service information The session is different, the second service information is transmitted through the second port; the second port has a topological connection relationship with the terminal device.
The method according to claim 1, wherein the URSP rule includes a flow descriptor and a routing descriptor corresponding to the flow descriptor, and the terminal device determines the first PDU session according to the URSP rule, include:

If the traffic descriptor matches the first port, the terminal device determines the first PDU session according to the routing descriptor and the attribute information of the established session.
The method according to claim 2, wherein the routing descriptors corresponding to different traffic descriptors are different; the terminal device determines the first PDU session according to the routing descriptor and the attribute information of the established session, comprising: :

The terminal device determines the first PDU session whose attribute information matches the routing descriptor in the established session.
The method according to claim 3, wherein the traffic descriptor includes port identification information;

The matching of the traffic descriptor with the first port includes: the identification information of the port is the same as the identification information of the first port.
The method according to claim 4, wherein the routing descriptor includes one or more of the following: single network slice selection auxiliary information S-NSSAI, data network name DNN, and identification information of the port.
The method according to claim 3, wherein the traffic descriptor includes identification information of a TSN terminal device;

The matching of the traffic descriptor with the first port includes: the identification information of the TSN terminal device is the same as the identification information of the first TSN terminal device; wherein the first TSN terminal device exists with the first port Topological connection relationship.
The method according to claim 6, wherein the routing descriptor includes one or more of the following: S-NSSAI, DNN, and identification information of the TSN terminal device.
The method according to claim 2, wherein the terminal device determines the first PDU session according to the routing descriptor and the attribute information of the established session, comprising:

Determining, by the terminal device, a second PDU session whose attribute information matches the routing descriptor in an established session;

Acquiring, by the terminal device, the identification information of the port corresponding to the second PDU session;

If the identification information of the port corresponding to the second PDU session is the same as the identification information of the first port, the terminal device regards the second PDU session as the first PDU session.
The method according to claim 2, wherein the terminal device determines the first PDU session according to the routing descriptor and the attribute information of the established session, comprising:

Determining, by the terminal device, a second PDU session whose attribute information matches the routing descriptor in an established session;

Acquiring, by the terminal device, the identification information of the port corresponding to the second PDU session;

If the identification information of the port corresponding to the second PDU session is different from the identification information of the first port, the terminal device sends a first PDU session establishment request to the session management network element, and the first PDU session is established The request is used to request the establishment of the first PDU session;

The terminal device receives a first PDU session establishment response message from the session management network element, where the first PDU session establishment response message is used to indicate that the first PDU session is successfully established.
The method according to claim 9, wherein the method further comprises:

The terminal device stores the correspondence between the first PDU session and the identification information of the first port.
The method according to claim 2, wherein the terminal device determines the first PDU session according to the routing descriptor and the attribute information of the established session, comprising:

Determining, by the terminal device, a third PDU session whose attribute information matches the routing descriptor in an established session;

Acquiring, by the terminal device, identification information of the TSN terminal device corresponding to the third PDU session;

If the identification information of the TSN terminal device corresponding to the third PDU session is the same as the identification information of the first TSN terminal device, the terminal device regards the third PDU session as the first PDU session; wherein, the first PDU session A TSN terminal device has a topological connection relationship with the first port.
The method according to claim 2, wherein the terminal device determines the first PDU session according to the routing descriptor and the attribute information of the established session, comprising:

Determining, by the terminal device, a third PDU session whose attribute information matches the routing descriptor in an established session;

Acquiring, by the terminal device, identification information of the TSN terminal device corresponding to the third PDU session;

If the identification information of the TSN terminal device corresponding to the third PDU session is different from the identification information of the first TSN terminal device, the terminal device sends a second PDU session establishment request to the session management network element, and the second PDU The session establishment request is used to request the establishment of the first PDU session; wherein, the first TSN terminal device has a topological connection relationship with the first port;

The terminal device receives a second PDU session establishment response message from the session management network element, where the second PDU session establishment response message is used to indicate that the first PDU session is successfully established.
The method according to claim 12, wherein the method further comprises:

The terminal device stores the correspondence between the first PDU session and the identification information of the first TSN terminal device.
The method according to claim 2, wherein the terminal device determines the first PDU session according to the routing descriptor and the attribute information of the established session, comprising:

If there is no session whose attribute information matches the routing descriptor in the established session, the terminal device sends a third PDU session establishment request to the session management network element, and the third PDU session establishment request is used to request Establishing a first PDU session, and the third PDU session establishment request includes the routing descriptor;

The terminal device receives a third PDU session establishment response message from the session management network element, the third PDU session establishment response message includes the routing descriptor, and the third PDU session establishment response message is used to indicate The first PDU session is successfully established;

Wherein, the routing descriptor includes identification information of a port or identification information of a TSN terminal device.
The method according to claim 1, wherein the URSP rule includes a flow descriptor and a routing descriptor corresponding to the flow descriptor; the terminal device determines the first PDU session according to the URSP rule, include:

Determining, by the terminal device, a flow descriptor of the first service information;

If the flow descriptor of the first service information is the same as the flow descriptor included in the URSP rule, the terminal device determines a fourth PDU session whose attribute information matches the routing descriptor in the established session ；

Acquiring, by the terminal device, the identification information of the port corresponding to the fourth PDU session;

If the identification information of the port corresponding to the fourth PDU session is the same as the identification information of the first port, the terminal device regards the fourth PDU session as the first PDU session.
The method according to claim 1, wherein the URSP rule includes a flow descriptor and a routing descriptor corresponding to the flow descriptor; the terminal device determines the first PDU session according to the URSP rule, include:

Determining, by the terminal device, a flow descriptor of the first service information;

If the flow descriptor of the first service information is the same as the flow descriptor included in the URSP rule, the terminal device determines a fourth PDU session whose attribute information matches the routing descriptor in the established session ；

Acquiring, by the terminal device, the identification information of the port corresponding to the fourth PDU session;

If the identification information of the port corresponding to the fourth PDU session is different from the identification information of the first port, the terminal device sends a fourth PDU session establishment request to the session management network element, and the fourth PDU session is established The request is used to request the establishment of the first PDU session;

The terminal device receives a fourth PDU session establishment response message from the session management network element, where the fourth PDU session establishment response message is used to indicate that the first PDU session is successfully established.
The method according to claim 16, wherein the method further comprises:

The terminal device stores the correspondence between the first PDU session and the identification information of the first port.
The method according to claim 1, wherein the URSP rule includes a flow descriptor and a routing descriptor corresponding to the flow descriptor; the terminal device determines the first PDU session according to the URSP rule, include:

Determining, by the terminal device, a flow descriptor of the first service information;

If the flow descriptor of the first service information is the same as the flow descriptor included in the URSP rule, the terminal device determines the fifth PDU session whose attribute information matches the routing descriptor in the established session ；

Acquiring, by the terminal device, identification information of the TSN terminal device corresponding to the fifth PDU session;

If the identification information of the TSN terminal device corresponding to the fifth PDU session is the same as the identification information of the first TSN terminal device, the terminal device regards the fifth PDU session as the first PDU session; wherein, the first PDU session A TSN terminal device has a topological connection relationship with the first port.
The method according to claim 1, wherein the URSP rule includes a flow descriptor and a routing descriptor corresponding to the flow descriptor; the terminal device determines the first PDU session according to the URSP rule, include:

Determining, by the terminal device, a flow descriptor of the first service information;

If the flow descriptor of the first service information is the same as the flow descriptor included in the URSP rule, the terminal device determines the fifth PDU session whose attribute information matches the routing descriptor in the established session ；

Acquiring, by the terminal device, identification information of the TSN terminal device corresponding to the fifth PDU session;

If the identification information of the TSN terminal device corresponding to the fifth PDU session is different from the identification information of the first TSN terminal device, the terminal device sends a fifth PDU session establishment request to the session management network element, and the fifth PDU The session establishment request is used to request the establishment of the first PDU session; wherein, the first TSN terminal device has a topological connection relationship with the first port;

The terminal device receives a fifth PDU session establishment response message from the session management network element, where the fifth PDU session establishment response message is used to indicate that the first PDU session is successfully established.
The method according to claim 19, wherein the method further comprises:

The terminal device stores the correspondence between the first PDU session and the identification information of the first TSN terminal device.
A session processing method, characterized in that the method includes:

The strategy control network element generates a user routing strategy URSP;

The policy control network element sends the URSP to the terminal device, and the URSP rule in the URSP includes a flow descriptor and a routing descriptor corresponding to the flow descriptor; the flow descriptor includes port identification information Or the identification information of the TSN terminal device.
The method according to claim 21, wherein the routing descriptors corresponding to different traffic descriptors are different.
The method according to claim 22, wherein the traffic descriptor includes identification information of the port;

The routing descriptor includes one or more of the following: single network slice selection auxiliary information S-NSSAI, data network name DNN, and identification information of the port.
The method according to claim 22, wherein the traffic descriptor includes identification information of the TSN terminal device;

The routing descriptor includes one or more of the following: S-NSSAI, DNN, and identification information of the TSN terminal device.
A session processing method, characterized in that the method includes:

The session management network element receives a protocol data unit PDU session establishment request from the terminal device, where the PDU session establishment request is used to request establishment of a first PDU session, and the PDU session establishment request includes a routing descriptor;

Establishing, by the session management network element, the first PDU session according to the routing descriptor;

The session management network element sends a PDU session establishment response message to the terminal device, the PDU session establishment response message includes the routing descriptor, and the PDU session establishment response message is used to instruct the establishment of the first PDU session success;

Wherein, the routing descriptor includes identification information of a port or identification information of a TSN terminal device of a delay-sensitive network.
A communication device, characterized by comprising a unit for executing the method according to any one of claims 1-20.
A communication device, characterized by comprising a unit for executing the method according to any one of claims 21-24.
A communication device, characterized by comprising a unit for executing the method according to claim 25.
A communication device, characterized in that the device includes a processor and a memory, and program instructions are stored in the memory, and the processor executes the program instructions stored in the memory so that the device executes The method of any one of 1-20.
A communication device, characterized in that the device includes a processor and a memory, and program instructions are stored in the memory, and the processor executes the program instructions stored in the memory so that the device executes The method of any one of 21-24.
A communication device, characterized in that the device includes a processor and a memory, and program instructions are stored in the memory, and the processor executes the program instructions stored in the memory so that the device executes 25 said method.
A computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, the computer program includes program instructions, and when the program instructions are executed by a communication device, the communication device executes The method of any one of 1-20, 21-24, or 25.