WO2020221266A1

WO2020221266A1 - Method and device for communication

Info

Publication number: WO2020221266A1
Application number: PCT/CN2020/087635
Authority: WO
Inventors: 李汉成; 周汉
Original assignee: 华为技术有限公司
Priority date: 2019-04-29
Filing date: 2020-04-28
Publication date: 2020-11-05
Also published as: CN111866987A; CN111866987B

Abstract

Provided in the present application are a method and device for communication. The method comprises: a core network device receives forwarding path information, the forwarding path information comprising a destination MAC address of a TSN stream; the core network device determines a forwarding policy for the TSN stream on the basis of the destination MAC address, and then, the core network device transmits the forwarding policy to a UE or a UPF. Because the forwarding policy determined by the core network device comprises the destination MAC address of the TSN stream, a device (such as the UE and UPF) using the forwarding policy can determine the corresponding forwarding policy on the basis of the destination MAC address in a received packet and to transmit packets of the TSN on the basis of the forwarding policy, that is, to transmit to a TSN terminal of a TSN system, thus implementing the correct transmission of the packets of the TSN by 5G system exchange nodes and favoring increased communication quality.

Description

Communication method and device

Cross references to related applications

This application claims the priority of a Chinese patent application filed with the Chinese Patent Office, the application number is 201910354381.6, and the application name is "a communication method and device" on April 29, 2019, the entire content of which is incorporated into this application by reference.

Technical field

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

Background technique

In the network architecture of the third generation partnership project (3rd generation partnership project, 3GPP) network (take the 5th generation (5G) system as an example) and the Time Sensitive Network (TSN) interoperability, The 5G system and the TSN Translator are taken as a logical TSN switching node (referred to as the 5G system switching node).

In the 5G network architecture, the terminal device acts as the receiver or sender of the stream, and the source address/destination address of the forwarding policy configured on the node of the user plane of the 5G system is the address of the terminal device. However, in a network architecture where 5G and TSN are interoperable, the destination media access control (MAC) address of the TSN stream is the MAC address of the TSN terminal, or a multicast address/local address, rather than the address of the terminal device.

Therefore, the forwarding strategy in the 5G system cannot realize the forwarding of the TSN stream in the network architecture where 5G and TSN are interoperable, that is, the 5G system switching node cannot realize the forwarding of the TSN stream.

Summary of the invention

The present application provides a communication method and device to realize the forwarding of the TSN stream by the switching node of the 5G system.

In the first aspect, the present application provides a communication method. The method includes: a terminal device receives a packet of a delay-sensitive network TSN stream, the packet includes a target media access control MAC address; the terminal device according to the purpose The MAC address determines the forwarding strategy of the TSN flow, where the forwarding strategy includes the destination MAC address; and the terminal device sends the message according to the forwarding strategy. In this solution, the terminal device can send messages of the TSN stream based on the forwarding strategy of the TSN stream, which realizes the correct transmission of the messages of the TSN stream by the 5G system switching node, which helps to improve the communication quality.

In a possible implementation method, the terminal device receives the forwarding policy from a session management network element, a policy control network element, or a user plane network element.

In a possible implementation method, the TSN flow is an upstream flow; the terminal device sending the message according to the forwarding strategy includes: the terminal device sends the message to the user through the session corresponding to the forwarding strategy The surface network element sends the message.

In a possible implementation method, the forwarding strategy further includes auxiliary information, and the auxiliary information includes the identification of the receiving port and/or the identification of the virtual local area network VLAN; the terminal device determines the forwarding strategy according to the destination MAC address , Including: the terminal device determines the forwarding strategy according to the destination MAC address and the auxiliary information.

In a possible implementation method, the TSN stream is a downstream stream; the forwarding strategy further includes an identification of a sending port, and the sending port is a port on the terminal device; the terminal device according to the forwarding strategy , Sending the message includes: the terminal device sends the message through the sending port.

In a possible implementation method, the forwarding strategy further includes the identifier of the VLAN; the terminal device determines the forwarding strategy according to the destination MAC address, including: the terminal device according to the destination MAC address and the VLAN To determine the forwarding strategy.

In a second aspect, the present application provides a communication method, the method includes: a user plane network element receives a packet of a delay-sensitive network TSN flow, the packet includes a destination MAC address; the user plane network element according to the purpose The MAC address determines the forwarding strategy of the TSN flow, where the forwarding strategy includes the destination MAC address; and the user plane network element sends the message according to the forwarding strategy. In this solution, the user plane network element can send the TSN stream message based on the TSN stream forwarding strategy, which realizes the correct transmission of the TSN stream message by the 5G system switching node, which helps to improve the communication quality.

In a possible implementation method, the user plane network element receives the forwarding policy from the session management network element or the application function network element; or, the user plane network element receives the forwarding policy from the session management network element or the application function network element. And determine the forwarding strategy according to the forwarding path information of the element, and the forwarding path information includes the destination MAC address.

In a possible implementation method, the TSN flow is an upstream flow; the forwarding strategy further includes an identification of a sending port, and the sending port is a sending port of the user plane network element; the user plane network element is based on The forwarding strategy, sending the message, includes: the user plane network element sends the message through the sending port.

In a possible implementation method, the forwarding strategy includes a forwarding rule FAR, and the FAR includes the identification of the sending port; or, the forwarding strategy includes first indication information, and the first indication information is used for Indicate the identifier of the sending port or used to indicate the identifier of the sending port and the destination MAC address.

In a possible implementation method, the forwarding strategy further includes the identifier of the VLAN; the user plane network element determines the forwarding strategy according to the destination MAC address, including: the user plane network element according to the destination MAC address And the identifier of the VLAN to determine the forwarding strategy.

In a possible implementation method, the TSN flow is a downstream flow; the user plane network element sending the message according to the forwarding strategy includes: the user plane network element corresponding to the forwarding strategy Session, sending the message to the terminal device.

In a possible implementation method, the message includes priority information; the user plane network element determines the 5G service quality indicator 5QI according to the priority information; the user plane network element adopts the forwarding strategy The corresponding session, sending the message to the terminal device, includes: the user plane network element sends the message to the terminal device through the session corresponding to the forwarding strategy according to the 5QI.

In a possible implementation method, the forwarding strategy further includes auxiliary information, the auxiliary information includes the identifier of the receiving port and/or the identifier of the virtual local area network VLAN; the user plane network element determines according to the destination MAC address The forwarding strategy includes: the user plane network element determines the forwarding strategy according to the destination MAC address and the auxiliary information.

In a possible implementation method, the forwarding strategy includes the packet inspection rule PDR, the PDR includes auxiliary information, and the auxiliary information includes the identifier of the receiving port and/or the VLAN identifier; or, the forwarding strategy includes the first Two indication information, the second indication information is used to indicate auxiliary information or used to indicate the auxiliary information and the destination MAC address.

In a third aspect, the present application provides a communication method, the method includes: a core network device receives forwarding path information, where the forwarding path information includes a destination MAC address of a TSN stream; the core network device determines according to the destination MAC address The forwarding strategy of the TSN stream; the core network device sends the forwarding strategy. The forwarding strategy determined by the core network equipment includes the destination MAC address of the TSN stream, so that the equipment (such as UE, UPF) using the forwarding strategy can determine the corresponding forwarding strategy according to the destination MAC address in the received message, and According to the forwarding strategy, the message of the TSN stream is sent, that is, to the TSN terminal of the TSN system, which realizes the correct transmission of the message of the TSN stream by the 5G system switching node, which helps to improve the communication quality.

In a possible implementation method, if the forwarding path information further includes auxiliary information, the forwarding strategy further includes the auxiliary information; the auxiliary information is at least one of the following information: the identification of the sending port, the receiving Port ID, VLAN ID.

In a possible implementation method, the core network device is a policy control network element; the core network device receiving forwarding path information includes: the core network device receives information from an application function network element or a session management network element. The forwarding path information; the core network device sending the forwarding strategy includes: the core network device sends the forwarding strategy to the terminal device and/or the user plane network element through the session management network element.

In a possible implementation method, the core network device obtains the service type corresponding to the session of the terminal device; the core network device determines the 5QI corresponding to the forwarding strategy according to the service type.

In a possible implementation method, the core network device acquiring the service type corresponding to the session of the terminal device includes: the core network device acquiring the session corresponding to the terminal device reported by the terminal device Service type; or, the core network device obtains priority information corresponding to the session of the terminal device reported by the terminal device, and determines the service type according to the priority information.

In a possible implementation method, the core network device is a session management network element; the core network device receives forwarding path information, including: the core network device receives information from an application function network element, a user plane network element, or policy control The network element receives the forwarding path information. The core network device sending the forwarding strategy includes: the core network device sending the forwarding strategy to a terminal device and/or a user plane network element.

In a fourth aspect, the present application provides a communication device. The device may be a terminal device or a chip for the terminal device. The device has the function of realizing each embodiment of the first aspect described above. This function can be realized by hardware, or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above-mentioned functions.

In a fifth aspect, the present application provides a communication device, which may be a user plane network element or a chip used for the user plane network element. The device has the function of realizing each embodiment of the second aspect described above. This function can be realized by hardware, or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above-mentioned functions.

In a sixth aspect, the present application provides a communication device, which may be a core network device (such as a session management network element or a policy control network element), or a chip for the core network device. The device has the function of realizing each embodiment of the third aspect. This function can be realized by hardware, or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above-mentioned functions.

In a seventh aspect, the present application provides a communication device, including: a processor and a memory; the memory is used to store computer execution instructions, and when the device is running, the processor executes the computer execution instructions stored in the memory, so that the The device executes the methods described in the above aspects.

In an eighth aspect, the present application provides a communication device, including: including units or means for performing each step of the above-mentioned aspects.

In a ninth aspect, the present application provides a communication device including a processor and an interface circuit, where the processor is configured to communicate with other devices through the interface circuit and execute the methods described in the foregoing aspects. The processor includes one or more.

In a tenth aspect, the present application provides a communication device, including a processor, configured to be connected to a memory, and configured to call a program stored in the memory to execute the methods described in the foregoing aspects. The memory can be located inside the device or outside the device. And the processor includes one or more.

In an eleventh aspect, the present application also provides a computer-readable storage medium having instructions stored in the computer-readable storage medium, which when run on a computer, cause a processor to execute the methods described in the foregoing aspects.

In the twelfth aspect, this application also provides a computer program product including instructions, which when run on a computer, causes the computer to execute the methods described in the above aspects.

In a thirteenth aspect, this application also provides a chip system, including a processor, configured to execute the methods described in the foregoing aspects.

Description of the drawings

Figure 1 is a schematic diagram of a 5G network architecture based on a service-oriented architecture;

Figure 2 is a schematic diagram of the fully centralized TSN system architecture;

Figure 3 is a schematic diagram of the architecture of the 3GPP network and TSN interworking system;

Figure 4 is a specific example of a 3GPP network and TSN interworking system;

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

FIG. 6 is a schematic flowchart of another communication method provided by this application;

FIG. 7 is a schematic flowchart of another communication method provided by this application;

FIG. 8 is a schematic flow diagram of another communication method provided by this application;

FIG. 9 is a schematic diagram of a communication device provided by this application;

FIG. 10 is a schematic diagram of another communication device provided by this application;

FIG. 11 is a schematic diagram of another communication device provided by this application;

FIG. 12 is a schematic diagram of another communication device provided by this application.

Detailed ways

In order to make the objectives, technical solutions, and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings. The specific operation method in the method embodiment can also be applied to the device embodiment or the system embodiment. Wherein, in the description of the present application, unless otherwise specified, "multiple" means two or more.

As shown in Figure 1, it is a schematic diagram of a 5G network architecture based on a service-oriented architecture. The 5G network architecture shown in FIG. 1 may include three parts, namely a terminal equipment part, a data network (DN), and an operator network part.

Among them, the operator network may include network exposure function (NEF) network elements, unified database (Unified Data Repository, UDR), policy control function (PCF) network elements, unified data management (unified data management) , UDM) network element, application function (AF) network element, access and mobility management function (AMF) network element, session management function (session management function, SMF) network element, ( Radio) access network ((radio) access network, (R) AN) and user plane function (user plane function, UPF) network elements, etc. In the above-mentioned operator network, parts other than the (wireless) access network part may be referred to as the core network part. For the convenience of description, the following takes (R)AN called RAN as an example for description.

Terminal equipment (also known as user equipment (UE)) is a device with wireless transceiver function, which can be deployed on land, including indoor or outdoor, handheld or vehicle-mounted; it can also be deployed on water (such as ship Etc.); it can also be deployed in the air (for example, airplanes, balloons, satellites, etc.). The terminal device may be a mobile phone (mobile phone), a tablet computer (pad), a computer with wireless transceiver function, a virtual reality (VR) terminal, an augmented reality (AR) terminal, an industrial control (industrial control) Wireless terminals in ), wireless terminals in self-driving (self-driving), wireless terminals in remote medical, wireless terminals in smart grid, wireless terminals in transportation safety (transportation safety) , Wireless terminals in smart cities, wireless terminals in smart homes, etc.

The above-mentioned terminal equipment can establish a connection with the operator's network through an interface (such as N1, etc.) provided by the operator's network, and use services such as data and/or voice provided by the operator's network. The terminal device can also access the DN through the operator's network, and use the operator's service deployed on the DN and/or the service provided by a third party. Among them, the aforementioned third party may be a service party other than the operator's network and terminal equipment, and may provide other services such as data and/or voice for the terminal equipment. Among them, the specific form of expression of the aforementioned third party can be determined according to actual application scenarios, and is not limited here.

Access network equipment, also known as (Radio) Access Network ((R)AN) equipment, is a type of equipment that provides wireless communication functions for terminals. The access network equipment includes, but is not limited to: next-generation base stations (gnodeB, gNB) in 5G, evolved node B (evolved node B, eNB), radio network controller (RNC), node B ( node B, NB), base station controller (BSC), base transceiver station (BTS), home base station (for example, home evolved nodeB, or home node B, HNB), baseband unit (baseBand unit) , BBU), transmission point (transmitting and receiving point, TRP), transmission point (transmitting point, TP), mobile switching center, etc.

The AMF network element is a control plane network element provided by the operator's network. It is responsible for the access control and mobility management of terminal equipment accessing the operator's network. For example, it includes functions such as mobile status management, allocation of temporary user identities, authentication and authorization of users, etc. .

The SMF network element is a control plane network element provided by the operator's network, and is responsible for managing the protocol data unit (protocol data unit, PDU) session of the terminal device. The PDU session is a channel used to transmit PDUs, and terminal devices need to transmit PDUs to each other through the PDU session and the DN. The PDU session is established, maintained, and deleted by the SMF network element. SMF network elements include session management (such as session establishment, modification, and release, including tunnel maintenance between UPF and RAN), UPF network element selection and control, service and session continuity (Service and Session Continuity, SSC) mode selection, Session-related functions such as roaming.

The UPF network element is a gateway provided by the operator and a gateway for the communication between the operator's network and the DN. UPF network elements include user plane-related functions such as data packet routing and transmission, packet inspection, service usage reporting, quality of service (QoS) processing, lawful monitoring, uplink packet inspection, and downlink packet storage.

DN, also called packet data network (PDN), is a network located outside the operator’s network. The operator’s network can be connected to multiple DNs, and multiple services can be deployed on the DN to provide terminal equipment. Services such as data and/or voice. For example, DN is the private network of a smart factory. The sensors installed in the workshop of the smart factory can be terminal devices. The control server of the sensor is deployed in the DN, and the control server can provide services for the sensors. The sensor can communicate with the control server, obtain instructions from the control server, and transmit the collected sensor data to the control server according to the instructions. For another example, a DN is an internal office network of a company. The mobile phones or computers of employees of the company can be terminal devices, and the mobile phones or computers of employees can access information and data resources on the company's internal office network.

The UDM network element is a control plane network element provided by the operator, and is responsible for storing subscriber permanent identifier (SUPI), security context (security context), subscription data and other information of subscribers in the operator's network. The information stored in UDM network elements can be used for authentication and authorization of terminal equipment accessing the operator's network. Among them, the contracted users of the above-mentioned operator's network may specifically be users who use the services provided by the operator's network, such as users who use China Telecom's mobile phone core card, or users who use China Mobile's mobile phone core card. The permanent subscription identifier (Subscription Permanent Identifier, SUPI) of the aforementioned subscriber may be the number of the mobile phone core card, etc. The credential and security context of the aforementioned subscriber may be a small file stored such as the encryption key of the mobile phone core card or information related to the encryption of the mobile phone core card for authentication and/or authorization. The aforementioned security context may be data (cookie) or token (token) stored on the user's local terminal (for example, mobile phone). The contract data of the aforementioned subscriber may be the supporting service of the mobile phone core card, such as the data package of the mobile phone core card or the use of the network. It should be noted that permanent identifiers, credentials, security contexts, authentication data (cookies), and tokens are equivalent to information related to authentication and authorization. In this application file of the present invention, no distinction or restriction is made for the convenience of description. If no special instructions are given, the embodiments of the present application will be described using a security context as an example, but the embodiments of the present application are also applicable to authentication and/or authorization information in other expression modes.

NEF network elements are control plane network elements provided by operators. NEF network elements open the external interface of the operator's network to third parties in a safe manner. When the SMF network element needs to communicate with a third-party network element, the NEF network element can serve as a relay for the communication between the SMF network element and the third-party network element. When the NEF network element is used as a relay, it can be used as the translation of the identification information of the subscriber and the translation of the identification information of the third-party network element. For example, when NEF sends the SUPI of the subscriber from the operator network to the third party, it can translate the SUPI into its corresponding external identity (identity, ID). Conversely, when the NEF network element sends the external ID (third-party network element ID) to the operator's network, it can be translated into SUPI.

The PCF network element is a control plane function provided by the operator to provide the SMF network element with a PDU session strategy. Policies can include charging-related policies, QoS-related policies, and authorization-related policies.

The AF network element is a functional network element that provides various business services. It can interact with the core network through the NEF network element and can interact with the policy management framework for policy management.

UDR is used to store data.

In Figure 1, Nnef, Npcf, Nudm, Naf, Nudr, Namf, Nsmf, N1, N2, N3, N4, and N6 are interface serial numbers. The meaning of these interface serial numbers can refer to the meaning defined in the 3GPP standard protocol, which is not limited here.

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

In the forwarding process of the traditional Ethernet network, when a large number of data packets arrive at the forwarding port in an instant, it will cause the problem of long forwarding delay or packet loss. Therefore, traditional Ethernet cannot provide services with high reliability and guaranteed transmission delay. , Unable to meet the needs of automotive control, industrial Internet and other fields. The Institute of Electrical and Electronic (IEEE) has defined the relevant TSN standard for the need for reliable delay transmission. This standard is based on Layer 2 switching to provide reliable delay transmission services to ensure the transmission of delay-sensitive business data. Reliability, and predictable end-to-end transmission delay.

IEEE 802.1cc defines three configuration models for TSN, one of which is a fully centralized TSN system architecture. As shown in Figure 2, it is a schematic diagram of a fully centralized TSN system architecture, including TSN End Station (TSN End Station), TSN Switch Node (TSN Bridge), Centralized User Configuration (CUC) network elements, and centralized network configuration ( Centralized Network Configuration (CNC) network element. Among them, CUC network elements and CNC network elements belong to the control plane network elements.

among them:

1) The TSN terminal is the sender or receiver of the data stream;

2) The TSN switching node reserves resources for data streams according to the definition of TSN, and schedules and forwards data packets;

3) The CNC manages the topology of the TSN user plane and the capability information of the TSN switching node (such as the transmission delay of the TSN switching node, the internal processing delay between the ports of the TSN switching node), and generates it according to the flow creation request provided by CUC The forwarding path of the data stream and the processing strategy on the terminal and each TSN switching node (such as the stream identifier, the port for sending and receiving messages, the receiving time window, the sending time window, the sending period, etc.), and then the processing strategy on the TSN switching node Send to the corresponding TSN switching node;

4) The CUC network element is used to collect the flow creation request of the TSN terminal, such as receiving the registration of the TSN sending terminal (Talker) and the TSN receiving terminal (Listener), receiving the flow information, exchanging configuration parameters, etc., and matching the TSN sending terminal After receiving the request from the terminal, the TSN requests the CNC network element to create a data stream, and confirms the processing strategy generated by the CNC network element.

After the CNC network element creates the TSN stream forwarding rule, it can determine the upstream forwarding path of the TSN switching node by sending a static table (Static filtering entries) to the TSN switching node. The information of the static table includes the destination media access control (MAC) address of the TSN flow, the identifier of the receiving port and the sending port of the TSN flow on the TSN switching node. Optionally, the static table information also Contains Virtual Local Area Network (Virtual Local Area Network, VLAN) identification (ID).

As shown in Figure 3, it is a schematic diagram of the architecture of the 3GPP network and TSN interworking system. That is, the 5G architecture shown in FIG. 1 and the TSN architecture shown in FIG. 2 are combined, and the 3GPP 5G system and the TSN Translator are integrated as a logical TSN switching node (called a 5G system switching node). Among them, FIG. 3 only shows some of the network elements in the 5G architecture (ie, AMF network elements, SMF network elements, PCF network elements, RAN, UE, AF network elements, UPF network elements).

among them:

1) On the control plane, the 5G system exchanges information with the nodes in the TSN system through the TSN converter on the control plane (ie, 5G AF network element). The information exchanged includes: 5G system exchange capability information, TSN configuration information , Time scheduling information and time synchronization information of TSN input and output ports.

2) On the user plane, the UPF network element of the 5G system receives the downlink TSN stream of the TSN system through the TSN converter, or sends the uplink TSN stream to the TSN system, where the TSN converter can be integrated in the UPF network element or with the UPF Independent deployment of network elements.

3) On the user plane, the UE of the 5G system receives the uplink TSN stream of the TSN system through the TSN converter, or sends the downlink TSN stream to the TSN system, where the TSN converter can be integrated in the UE or deployed independently of the UE.

The solution of this application is described with respect to the network architecture shown in FIG. 3.

The user plane network element in this application refers to a network element having the function of the UPF network element shown in FIG. 3. The user plane network element may be integrated with a TSN converter, or the TSN converter is independent of the user plane network Meta-deployment, for the convenience of description, this application takes the integration of the TSN converter in the user plane network element as an example for description. For convenience of explanation, the user plane network element is referred to as UPF in the subsequent description of this application. It should be noted that in future communications, the user plane network element may still be called a UPF network element, or may have other names. This application is not limited. The UPF that appears anywhere in this application can be replaced by a user plane network element.

The session management network element in this application refers to a network element having the function of the SMF network element shown in FIG. 3 or FIG. 1. For the convenience of explanation, the session management network element is referred to as SMF in the subsequent description of this application. It should be noted that in future communications, the session management network element may still be referred to as SMF network element, or may have other names. This application is not limited. The SMF that appears anywhere in this application can be replaced with a session management network element.

The policy control network element in this application refers to a network element having the function of the PCF network element shown in FIG. 3 or FIG. 1. For the convenience of explanation, the policy control network element is referred to as PCF in the subsequent description of this application. It should be noted that in future communications, the policy control network element may still be called a PCF network element, or may have other names. This application is not limited. The PCF that appears anywhere in this application can be replaced with a policy control network element.

The mobility management network element in this application refers to a network element having the function of the AMF network element shown in FIG. 3 or FIG. 1. For the convenience of description, the mobility management network element is called AMF in the subsequent description of this application. It should be noted that in future communications, the policy control network element may still be called AMF network element, or may have other names. , This application is not limited. The AMF that appears anywhere in this application can be replaced by a mobility management network element.

The application function network element in this application refers to a network element having the function of the AF network element shown in FIG. 3 or FIG. 1. For convenience of explanation, the application function network element is referred to as AF in the subsequent description of this application. It should be noted that in future communications, the application function network element may still be referred to as an AF network element, or may have other names. This application is not limited. AFs that appear anywhere in the application can be replaced with application function network elements.

The terminal device in this application refers to a device with the function of the UE shown in FIG. 3. The terminal device may be integrated with a TSN converter, or the TSN converter may be deployed independently of the terminal device. For the convenience of description, this application Take the TSN converter integrated in the terminal device as an example for description. For convenience of description, the terminal device is referred to as UE in the subsequent description of this application.

For the network architecture shown in Figure 3, the CNC network element configures the service type information of the TSN service for each switching node (including the 5G system switching node and other TSN switching nodes) according to the information reported by the 5G system switching node and other TSN switching nodes ( traffic pattern), including: sending time window, receiving time window, flow period, etc., to remove delay jitter. In the following behavior example, the CNC network element sends the service type information of the TSN service to the PCF through the AF, and the PCF sends the service type information to the UE. The TSN converter on the UE side transmits the TSN according to the sending time window defined in the service type information. Stream for sending processing.

In the network architecture shown in FIG. 1, the UE acts as the receiver or sender of the flow, and the source address/destination address of the forwarding policy configured on the node of the user plane of the 5G system is the address of the UE. For example, the forwarding strategy on the UPF is: in the downlink direction, the flow whose destination address is the UE address is sent to the session corresponding to the UE; in the uplink direction, the flow whose source address is the UE address is received from the session corresponding to the UE and forwarded. For another example, the forwarding strategy on the UE is: in the downlink direction, a flow whose destination address is the UE address is received from the UPF through the session corresponding to the UE; in the uplink direction, the flow whose source address is the UE address is sent to the UPF through the session corresponding to the UE.

However, in the architecture shown in FIG. 3, the destination MAC address of the TSN stream is the MAC address of the TSN terminal, or the multicast address/local address, rather than the address of the UE. Therefore, the forwarding strategy in the 5G system shown in FIG. 1 cannot realize the forwarding of the TSN stream in the network architecture shown in FIG. 3. As shown in Figure 4, it is a specific example of the 3GPP network and TSN interworking system. For example, if the TSN terminal 1 in the TSN system sends a TSN flow service message to the TSN terminal 2, the destination MAC address in the service message is the MAC address of the TSN terminal 2 instead of the UE address.

In order to realize the function of the 5G system as a TSN switching node in the network architecture shown in Figure 3, the 5G system needs to determine the forwarding strategy of the user plane according to the forwarding path information generated by the TSN control plane to realize the forwarding of the TSN stream.

To this end, the present application provides a communication method. As shown in FIG. 5, the method includes the following steps:

Step 501: The core network device receives forwarding path information, where the forwarding path information includes the destination MAC address of the TSN stream.

The destination MAC address is the MAC address of the TSN terminal of the TSN system, or the multicast MAC address, or the local MAC address.

Optionally, the forwarding path information further includes auxiliary information, and the auxiliary information includes, for example, at least one of an identifier of a transmitting port, an identifier of a receiving port, and an identifier of a virtual local area network (Virtual Local Area Network, VLAN).

Step 502: The core network device determines the forwarding strategy of the TSN flow according to the destination MAC address.

The forwarding strategy of the TNS stream includes the destination MAC address. If the forwarding path information includes the above-mentioned auxiliary information, the forwarding strategy may also include the above-mentioned auxiliary information.

Step 503: The core network device sends a forwarding strategy.

For example, the core network device may send a forwarding strategy to the UE and/or UPF, so that the UE and/or UPF can receive and send service packets of the TSN flow according to the forwarding strategy.

Based on the foregoing embodiment, the forwarding strategy determined by the core network device includes the destination MAC address of the TSN stream, so that the device (such as UE, UPF) using the forwarding strategy can determine the corresponding forwarding strategy based on the destination MAC address and forward The strategy of sending TSN stream messages, that is, to the TSN terminal of the TSN system, realizes the correct transmission of TSN stream messages by the 5G system switching node, which helps to improve communication quality.

As an implementation manner, the forwarding strategy in the foregoing embodiment may be, for example:

1. UE's forwarding strategy

The forwarding strategy on the UE may be generated by SMF and sent to the UE, or generated by the PCF and sent to the UE through SMF, or generated by the UE according to the received forwarding path information.

It should be noted that the UE may send the information in the forwarding strategy to the TSN converter on the UE side for the TSN converter on the UE side to generate the forwarding strategy. As an implementation manner, the UE can send part of the information in the forwarding strategy to the TSN converter on the UE side. For example, for downlink packets, the forwarding strategy information includes the destination MAC address, the identification of the sending port, and the VLAN identification, and the UE can transfer The destination MAC address and the identification of the sending port are sent to the TSN converter, and the VLAN identification can be sent to the TSN converter or not to the TSN converter.

The forwarding strategy on the UE is divided into the forwarding strategy for the uplink TSN flow and the forwarding strategy for the downlink TSN flow, which will be explained separately below.

1. Forwarding strategy for upstream TSN flow

The forwarding strategy corresponding to the uplink TSN flow includes the destination MAC address, and optionally, auxiliary information. The auxiliary information includes the identifier of the receiving port and/or the identifier of the VLAN. The identifier of the receiving port refers to the identifier of the receiving port of the TSN repeater on the UE.

As an implementation manner, after the UE receives the message of the uplink TSN flow, it determines the forwarding strategy according to the destination MAC address in the message, and then sends the message to the UPF through the session corresponding to the forwarding strategy.

As another implementation method, after the UE receives the message of the uplink TSN flow, it determines the forwarding strategy corresponding to the message according to the destination MAC address and auxiliary information in the message, and then sends the forwarding strategy to the UPF through the session corresponding to the forwarding strategy. Message.

2. Forwarding strategy for downstream TSN streams

The forwarding strategy corresponding to the downlink TSN flow includes the destination MAC address and the identification of the sending port, and optionally, the identification of the VLAN. The identification of the transmission port refers to the identification of the transmission port of the UE, and specifically refers to the identification of the transmission port of the TSN repeater on the UE.

As an implementation method, after the UE receives the message of the downlink TSN flow, it determines the forwarding strategy according to the destination MAC address in the message, and then sends the message through the sending port corresponding to the sending port identifier in the forwarding policy, for example, Send the message to the TSN switching node or TSN terminal of the TSN system.

As yet another implementation method, after the UE receives the message of the downlink TSN flow, it determines the forwarding strategy according to the destination MAC address and VLAN identification in the message, and then sends the message through the sending port corresponding to the sending port identification in the forwarding strategy. The message, for example, is sent to the TSN switching node or TSN terminal of the TSN system.

Two, UPF forwarding strategy

The forwarding strategy on the UPF can be generated by the UPF based on forwarding path information (the forwarding path information includes the destination MAC address), the forwarding path information is from AF or SMF, or the forwarding strategy can also be generated by SMF and sent to UPF, Or, the forwarding strategy may also be generated by PCF and sent to UPF through SMF.

It should be noted that the UPF can send the information in the forwarding strategy to the TSN converter on the UPF side for the TSN converter on the UPF side to generate the forwarding strategy. As an implementation manner, UPF can send part of the information in the forwarding strategy to the TSN converter on the UPF side. For example, for uplink packets, the forwarding strategy information includes the destination MAC address, the identification of the sending port, and the VLAN identification, and the UPF can transfer The destination MAC address and the identification of the sending port are sent to the TSN converter, and the VLAN identification can be sent to the TSN converter or not to the TSN converter.

The forwarding strategies on the UPF are divided into forwarding strategies for upstream TSN flows and forwarding strategies for downstream TSN flows, which will be explained separately below.

1. Forwarding strategy for upstream TSN flow

The forwarding strategy corresponding to the uplink TSN flow includes the destination MAC address and the identification of the sending port, and optionally, the identification of the VLAN. The identification of the sending port refers to the identification of the sending port of the UPF, specifically, the identification of the sending port of the TSN repeater on the UPF.

As an implementation method, after UPF receives the message of the upstream TSN flow, it determines the forwarding strategy according to the destination MAC address in the message, and then sends the message through the sending port corresponding to the sending port identifier in the forwarding policy, for example Send the message to the TSN switching node or TSN terminal of the TSN system.

As yet another implementation method, after UPF receives the message of the upstream TSN flow, it determines the forwarding strategy according to the destination MAC address and VLAN identifier in the message, and then sends it through the transmitting port corresponding to the transmitting port identifier in the forwarding strategy. The message, for example, is sent to the TSN switching node or TSN terminal of the TSN system.

It should be noted that when the forwarding strategy for the upstream TSN flow on the UPF is received from the SMF, the forwarding strategy sent by the SMF to the UPF indicates the destination MAC address of the TSN flow and the identification of the sending port. The optional also includes VLAN ID (VLAN ID).

1) The way of indicating the destination MAC address may be: SMF is indicated in the packet detection rule (Packet detection rule, PDR) corresponding to the session sent to the UPF.

2) The method of indicating the identification of the sending port may be: defining a new field in the forwarding action rule (FAR) to indicate the identification of the sending port, or sending first indication information to the UPF, and the first indication information is used for Indicate the identification of the sending port. The specific implementation of the first indication information may be to extend an existing field, for example, to indicate the identification of the sending port in the instance field, for example, different sending ports on the UPF correspond to different instance information, or to use existing There is an instance definition combined with the identification of the sending port as the instance information.

It should be noted that, as yet another implementation manner, the first indication information may also be used to indicate the identifier of the sending port and the destination MAC address. That is, on the one hand, the destination MAC address is indicated by the PDR, and on the other hand, the identifier of the sending port and the destination MAC address are indicated by the first indication information. The destination MAC address indicated by the PDR is used by the UPF, and the destination MAC address indicated by the first indication information The ID of the sending port is used by the TSN converter corresponding to the UPF.

Of course, if the first indication information only indicates the identification of the sending port, the UPF can generate new indication information and send it to the TSN converter according to the destination MAC address indicated by the PDR and the identification of the sending port indicated by the first indication information. The new indication information indicates the identification of the sending port and the target MAC address.

3) The way of indicating the VLAN ID can be indicated in the PDR, or similar to the way of indicating the ID of the sending port (for example, indicated in the above first indication information, or indicated by other indication information), you can refer to the foregoing description .

2. Forwarding strategy for downstream TSN streams

The forwarding strategy corresponding to the downlink TSN flow includes the destination MAC address, and optionally, auxiliary information. The auxiliary information includes the identifier of the receiving port and/or the identifier of the VLAN. The identifier of the receiving port refers to the identifier of the receiving port of the TSN repeater on the UPF.

As an implementation manner, after the UE receives the packet of the downlink TSN flow, it determines the forwarding strategy according to the destination MAC address in the packet, and then sends the packet to the UE through the session corresponding to the forwarding strategy.

As another implementation method, after the UE receives the packet of the downlink TSN flow, it determines the forwarding strategy corresponding to the packet according to the destination MAC address and auxiliary information in the packet, and then sends the forwarding strategy to the UE through the session corresponding to the forwarding strategy. Message.

As yet another implementation manner, the message of the downlink TSN flow also includes priority information. After receiving the message of the downlink TSN flow, the UE determines the forwarding strategy corresponding to the message according to the destination MAC address in the message, and Determine the 5G QoS indicator (5G QoS indicator, 5QI) according to the priority information in the message (a 5QI indicates the priority of message transmission), so that the UPF can send the message to the UE based on the 5QI and the forwarding strategy corresponding to the message Send the message.

It should be noted that when the forwarding strategy for the downlink TSN flow on the UPF is received from the SMF, the forwarding strategy sent by the SMF to the UPF indicates the destination MAC address of the TSN flow, and optionally also indicates auxiliary information. The auxiliary information includes VLAN identification and/or receiving port identification. among them:

1) The way to indicate the destination MAC address is to indicate in the PDR corresponding to the session sent to the UPF.

2) The way to indicate the auxiliary information can be: define a new field in the PDR to indicate the identifier of the receiving port (for example, defined in the ethernet filter of the PDR), or send second indication information to the UPF, the second indication information is used for Indicate auxiliary information. The specific implementation of the second indication information may be, for example, extending an existing field, for example, indicating the identifier of the receiving port in the instance field, for example, different receiving ports on the UPF correspond to different instance information, or using the existing instance Define the identifier of the combined receiving port as the instance information.

It should be noted that, as yet another implementation manner, the second indication information may also be used to indicate auxiliary information and the destination MAC address. That is, on the one hand, the destination MAC address is indicated by the PDR, and on the other hand, the auxiliary information and the destination MAC address are indicated by the second indication information. The destination MAC address indicated by the PDR is used by the UPF, and the destination MAC address and auxiliary information indicated by the second indication information The information is for the TSN converter corresponding to UPF.

Of course, if the second indication information only indicates auxiliary information, the UPF can generate new indication information according to the destination MAC address indicated by the PDR and the auxiliary information indicated by the second indication information and send it to the TSN converter. The new indication information The auxiliary information and target MAC address are indicated.

It should be noted that in addition to being indicated in the foregoing second indication information, the VLAN identifier may also be indicated in the PDR, which is not limited in this application.

The above is an introduction to the forwarding strategy on the UPF and the forwarding strategy on the UE. Among them, the forwarding strategy on the UE and UPF is obtained from the core network device, which can be PCF, UPF, or SMF. That is, in this application, the forwarding strategy can be determined by the PCF or the UPF. , Or the forwarding strategy can be determined by SMF, which will be explained separately below.

Method 1: PCF determines the forwarding strategy

Based on this implementation method, the PCF receives forwarding path information from AF or SMF. The forwarding path information includes the destination MAC address, and optionally also includes information such as the identifier of the receiving port, the identifier of the transmitting port, and the VLAN identifier. The forwarding path information comes from In the CNC network element, the PCF then determines the forwarding strategy according to the forwarding path information, and sends the forwarding strategy to the SMF, and the SMF sends the forwarding strategy to the UPF and/or UE.

As an implementation manner, the PCF may also obtain the service type corresponding to the UE's session, and determine the 5QI corresponding to the forwarding strategy according to the service type, and the 5QI is used to indicate that the QoS flow corresponding to the 5QI uses the forwarding strategy.

Optionally, the PCF may obtain the service type corresponding to the session of the UE reported by the UE, that is, the service type corresponding to the session of the UE reported by the UE to the PCF. Or, the UE reports the priority information corresponding to the UE's session to the PCF, and then the PCF determines the service type according to the priority information.

Implementation method 2: UPF determines forwarding strategy

Based on this implementation method, the UPF receives forwarding path information from the AF. The forwarding path information includes the destination MAC address, and optionally includes information such as the identifier of the receiving port, the identifier of the sending port, and the VLAN identifier. The forwarding path information comes from the CNC network. Yuan, and then determine the forwarding strategy on the UPF according to the forwarding path information.

For the forwarding strategy on the UE, the UPF can send the forwarding path information to the SMF, and the SMF determines the forwarding strategy on the UE and sends it to the UE, or it can also be the UPF that sends the forwarding path information to the UE, and the UE determines the forwarding path information on the UE. Forwarding strategy.

Implementation method three, SMF determines the forwarding strategy

Based on this implementation method, SMF receives forwarding path information from AF, UPF, or PCF. The forwarding path information includes the destination MAC address, and optionally also includes information such as the identifier of the receiving port, the identifier of the transmitting port, and the VLAN identifier. The forwarding path information From the CNC network element, the SMF then determines the forwarding strategy according to the forwarding path information, and sends the forwarding strategy to the UE and/or UPF.

The specific implementation process of determining the forwarding strategy and sending the forwarding strategy to the UE and/or the UE will be described below in conjunction with specific embodiments.

In the following embodiments shown in Figure 6-8, the AF receives the forwarding path information (such as a static table) of the TSN flow from the control plane of the TSN. The forwarding path information includes the destination MAC of the TSN flow, and the TSN flow is in the switching node (such as UPF). , The identifier of the receiving port, the identifier of the transmitting port on the UE), and optionally the VLAN identifier. Afterwards, the AF sends the forwarding path information to the PCF/SMF/UPF, and then creates a UPF forwarding strategy, and optionally, a forwarding strategy of the UE. Among them, the way of AF sending messages to PCF/SMF/UPF can be direct sending or sending through NEF network elements.

As shown in FIG. 6, a schematic flow diagram of another communication method provided by this application. This method can be used to determine the user plane forwarding strategy. In this embodiment, the TSN network control plane sends forwarding path information to the control plane network element AF of the 5G system switching node. After the AF receives the forwarding path information, it sends the forwarding path information At the PCF, the PCF is triggered to perform the QoS flow creation or update process, and then determine the user plane forwarding strategy.

The method includes the following steps:

Step 601: The CNC sends the forwarding path information of the TSN stream on the 5G system switching node to the AF. Correspondingly, the AF can receive the forwarding path information.

The forwarding path information includes the destination MAC address of the TSN flow, the identifier of the sending port on the switching node, and optionally, the identifier of the receiving port on the switching node, and the VLAN identifier.

The destination MAC address of the TSN stream here is the MAC address of the TSN terminal (as the receiver) in the TSN system, or the multicast MAC address, or the local MAC address. The identification of the sending port on the switching node includes the identification of the sending port of the TSN repeater on the UPF in the 5G system switching node and the identification of the sending port of the TSN repeater on the UE in the 5G system switching node. The identifier of the receiving port on the switching node includes the identifier of the receiving port of the TSN repeater on the UE in the 5G system switching node and the identifier of the receiving port of the TSN repeater on the UPF in the 5G system switching node.

Step 602: The AF sends the forwarding path information of the above-mentioned TSN stream to the PCF. Correspondingly, the PCF can receive the forwarding path information.

The specific implementation method of this step, for example, may be that AF forwards the message carrying forwarding path information received from CNC to PCF, or it may also be that AF parses the forwarding path information received from CNC, and then passes the information between AF and PCF. Yuan sent. Among them, the AF can directly send the message (carrying forwarding path information) to the PCF, or send it through the NEF.

In step 603, the PCF initiates a QoS flow creation/modification process, and sends the forwarding path information of the TSN flow to the SMF through the QoS flow creation/modification request.

Optionally, the PCF may also determine the forwarding strategy according to the forwarding path information, and directly send the forwarding strategy to the SMF in this step 603. The forwarding strategy here refers to the forwarding strategy on the UPF and the forwarding strategy on the UE. For details, refer to the related description in the embodiment of FIG. 5.

In step 604, the SMF sends the forwarding strategy of the TSN stream to the UPF through the N4 session creation/modification request.

It should be noted that the forwarding strategy on the SMF may be determined according to the forwarding path information received from the PCF, or it may be directly received from the PCF. The forwarding strategy here refers to the forwarding strategy on the UPF. For details, reference may be made to the related description in the embodiment of FIG. 5.

Step 605: The SMF sends the forwarding strategy of the TSN stream to the UE.

The forwarding strategy here refers to the forwarding strategy on the UE. For details, reference may be made to the related description in the embodiment of FIG. 5.

This step is optional. Specifically, this step is performed when the user session corresponds to multiple UE ports (that is, the port of the TSN transponder on the UE), or the UE port corresponds to multiple sessions, otherwise, this step may not be performed when one user session corresponds to one UE port. step.

In step 606, the UPF forwards the TSN stream according to the forwarding strategy.

Step 607: The UE forwards the TSN stream according to the forwarding strategy.

This step is optional. Step 607 is executed when step 605 is executed, and step 607 is not executed when step 605 is not executed.

This embodiment implements the forwarding of TSN streams based on the existing 5G management and forwarding architecture. This method is also applicable to other scenarios where the forwarding path is specified by specifying the flow information and the forwarding port.

As shown in FIG. 7, it is a schematic flowchart of another communication method provided by this application. This method can be used to determine the user plane forwarding strategy. In this embodiment, the AF sends the forwarding path information of the TSN flow obtained from the TSN control plane to the SMF, and then the SMF triggers the QoS flow creation/modification process, or the SMF directly creates the user plane forwarding Strategies to realize the creation of TSN stream forwarding strategies for 5G system users.

The method includes the following steps:

Step 701 is the same as step 601 in the embodiment of FIG. 6, and reference may be made to the foregoing description.

Step 702: AF sends forwarding path information to SMF.

Step 703: The SMF sends forwarding path information to the PCF for triggering the QoS flow creation/modification process.

In this step, the SMF can directly forward the message carrying forwarding path information received from the AF to the PCF, or send forwarding path information through the cell defined between the SMF and the PCF.

Steps 704 to 708 are the same as steps 603 to 607 in the embodiment of FIG. 6, and reference may be made to the foregoing description.

It should be noted that the above steps 703 to 704 are optional steps. That is, when step 703 to step 704 are executed, the SMF triggers the PCF to initiate the QoS flow creation/modification process, thereby realizing the creation of the TSN flow forwarding strategy for the 5G system users. When steps 703 to 704 are not performed, the SMF directly creates the user plane forwarding strategy, so as to realize the creation of the TSN stream forwarding strategy for the 5G system users.

This embodiment implements TSN stream forwarding based on the existing 5G management and forwarding architecture. This method is also applicable to other scenarios where the forwarding path is specified by specifying TSN flow information and forwarding ports.

As shown in FIG. 8, it is a schematic flowchart of another communication method provided by this application. This method can be used to determine the user plane forwarding strategy. In this embodiment, the AF sends the forwarding path information of the TSN stream obtained from the TSN control plane to the UPF, and then includes two processing methods: Method one is that the UPF sends the forwarding path information of the TSN stream To SMF, and then trigger the QoS flow creation/modification process (step 803-step 809); the second method is that UPF determines its own forwarding strategy according to the forwarding path information of the TSN flow, and sends the forwarding path information of the TSN flow to SMF or The UE is used to create a forwarding strategy on the UE side (step 810-step 814).

The method includes the following steps:

Step 801 is the same as step 701 in the embodiment of FIG. 7.

Step 802: The AF sends the forwarding path information of the TSN stream to the UPF.

The specific implementation method of this step, for example, can be AF forwarding the message carrying forwarding path information received from CNC to UPF, or it can also be AF parsing the forwarding path information received from CNC, and then pass the cell between AF and UPF send. Among them, the AF can directly send the message (carrying forwarding path information) to the UPF, or it can be sent through the NEF.

As an implementation manner, after step 802, the following steps 803 to 809 are executed. As yet another implementation manner, after step 802, the following steps 810 to 814 are performed. Described below separately.

Method one (step 803-step 809):

In step 803, the UPF sends the forwarding path information of the TSN stream to the SMF to create a user plane forwarding strategy.

Step 804 to step 809 are the same as step 703 to step 708 in the embodiment of FIG. 7, and reference may be made to the foregoing description.

It should be noted that step 804 to step 805 (corresponding to step 703 to step 704 in the embodiment of FIG. 7) are also optional steps. For details, reference may be made to the relevant description of the embodiment in FIG. 7.

Method two (step 810-step 814):

Step 810: The UPF determines the forwarding strategy on the UPF according to the forwarding path information of the TSN stream.

For the content of the forwarding strategy determined by the UPF, reference may be made to the related description of the embodiment in FIG. 5.

In step 811, the UPF sends the forwarding path information of the TSN stream to the SMF or the UE to create a forwarding strategy on the UE.

The forwarding path information includes the destination MAC address of the TSN stream, the identification of the sending port of the TSN converter on the UE, and optionally, the identification and/or VLAN identification of the receiving port of the TSN converter on the UE.

Step 812: The SMF determines the forwarding strategy of the TSN stream of the UE, and sends the forwarding strategy to the UE.

This step is optional. This step is executed when the UPF sends the forwarding path information to the SMF in step 811; otherwise, this step is not executed.

Steps 813 to 814 are the same as steps 707 to 708 in the embodiment of FIG. 7, and reference may be made to the foregoing description.

Further, the present application also provides a method for AF/PCF to determine a QoS flow, and the method for determining a QoS flow can be combined with any of the embodiments in FIGS. 5-9.

As an implementation manner, the method for the AF/PCF to determine the QoS flow is: when the AF/PCF obtains the traffic class, the AF/PCF determines the 5QI according to the service type information, and then determines the QoS flow according to the 5QI. A 5QI is used to indicate the priority information of a QoS flow. Among them, the methods for AF/PCF to obtain service type information include but are not limited to:

Method 1: The forwarding path information received by the AF from the CNC includes service type information.

Optionally, the AF may send the service type information to the PCF.

Method 2: When the forwarding path information received by the AF from the CNC does not contain the service type information, the AF requests the CNC/CUC for the service type information corresponding to the TSN flow according to the destination MAC of the TSN flow.

Optionally, the AF may send the service type information to the PCF.

Method 3: When the forwarding path information received by the AF from the CNC does not contain the service type information, the AF waits for the subsequent configuration of the CNC and obtains the service type information from the subsequent configuration.

Optionally, the AF may send the service type information to the PCF.

Method 4, the UE reports the port capability information on the UE side (including the supported service type information) to the AF/PCF.

Method 5, the UE/UPF reports to the AF/PCF the VLAN ID supported by the port, the priority information corresponding to the VLAN ID, and the service type information corresponding to the priority information, that is, the AF/PCF can obtain the VLAN ID and priority information The correspondence between the three types of business information. Therefore, when the AF/PCF receives the forwarding path information, it can obtain the priority information corresponding to the VLAN identifier on the UE/UPF port according to the receiving/sending port identifier and the VLAN identifier in the forwarding path information, and then obtain the priority information corresponding to the priority information. Business type information.

Optionally, the AF may send the service type information to the PCF.

As another implementation method, you can also directly create or/modify the QoS flow first. The 5QI is not specified in the QoS flow information. After the UPF receives the service message of the TSN flow, the service is determined according to the priority information in the message. Type information, and then determine the 5QI based on the service type information.

The foregoing mainly introduces the solution provided by this application from the perspective of interaction between various network elements. It can be understood that, in order to realize the above-mentioned functions, each network element described above includes hardware structures and/or software modules corresponding to each function. Those skilled in the art should easily realize that in combination with the units and algorithm steps of the examples described in the embodiments disclosed herein, the present invention can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is executed by hardware or computer software-driven hardware depends on the specific application and design constraint conditions of the technical solution. Professionals can use different methods for each specific application to realize the described functions, but such realization should not be considered as going beyond the scope of the present invention.

As shown in FIG. 9, it is a possible exemplary block diagram of the communication device involved in this application. The device 900 may exist in the form of software or hardware. The apparatus 900 may include: a processing unit 902 and a communication unit 903. As an implementation manner, the communication unit 903 may include a receiving unit and a sending unit. The processing unit 902 is used to control and manage the actions of the device 900. The communication unit 903 is used to support communication between the device 900 and other network entities. The device 900 may further include a storage unit 901 for storing program codes and data of the device 900.

The processing unit 902 may be a processor or a controller, for example, a general-purpose central processing unit (central processing unit, CPU), a general-purpose processor, a digital signal processing (digital signal processing, DSP), and an application specific integrated circuit (application specific integrated circuit). circuits, ASIC), field programmable gate array (FPGA) or other programmable logic devices, transistor logic devices, hardware components or any combination thereof. It can implement or execute various exemplary logical blocks, modules and circuits described in conjunction with the disclosure of this application. The processor may also be a combination for realizing computing functions, for example, including a combination of one or more microprocessors, a combination of a DSP and a microprocessor, and so on. The storage unit 901 may be a memory. The communication unit 903 is an interface circuit of the device for receiving signals from other devices. For example, when the device is implemented as a chip, the communication unit 903 is an interface circuit for the chip to receive signals from other chips or devices, or an interface circuit for the chip to send signals to other chips or devices.

The apparatus 900 may be the terminal device in any of the foregoing embodiments, and may also be a chip for terminal devices. For example, when the apparatus 900 is a terminal device, the processing unit 902 may be a processor, for example, and the communication unit 903 may be a transceiver, for example. Optionally, the transceiver may include a radio frequency circuit, and the storage unit may be, for example, a memory. For example, when the apparatus 900 is a chip for terminal equipment, the processing unit 902 may be a processor, for example, and the communication unit 903 may be an input/output interface, a pin, or a circuit, for example. The processing unit 902 can execute computer-executable instructions stored in the storage unit. Optionally, the storage unit is a storage unit in the chip, such as a register, a cache, etc., and the storage unit may also be a storage unit located outside the chip in the terminal device. The storage unit, such as read-only memory (ROM) or other types of static storage devices that can store static information and instructions, random access memory (RAM), etc.

In an embodiment, the apparatus 900 is a terminal device, and the communication unit 903 includes a sending unit and a receiving unit. A receiving unit, configured to receive a packet of a delay-sensitive network TSN flow, the message including a destination media access control MAC address; a processing unit 902, configured to determine a forwarding strategy of the TSN flow according to the destination MAC address , The forwarding strategy includes the destination MAC address; the sending unit is configured to send the message according to the forwarding strategy.

In a possible implementation method, the receiving unit is further configured to receive the forwarding policy from a session management network element, a policy control network element, or a user plane network element.

In a possible implementation method, the TSN stream is an upstream stream; the sending unit is specifically configured to send the message to the user plane network element through the session corresponding to the forwarding strategy.

In a possible implementation method, the forwarding strategy further includes auxiliary information, and the auxiliary information includes the identifier of the receiving port and/or the identifier of the virtual local area network VLAN; the processing unit 902 is specifically configured to perform according to the destination MAC The address and the auxiliary information determine the forwarding strategy.

In a possible implementation method, the TSN stream is a downstream stream; the forwarding strategy further includes an identification of a sending port, and the sending port is a sending port of the device; and the sending unit is specifically configured to pass through The sending port sends the message.

In a possible implementation method, the forwarding strategy further includes an identifier of a VLAN; the processing unit 902 is specifically configured to determine the forwarding strategy according to the destination MAC address and the identifier of the VLAN.

It can be understood that, for the specific implementation process and corresponding beneficial effects when the device is used in the foregoing communication method, reference may be made to the relevant description in the foregoing method embodiment, which is not repeated here.

As shown in FIG. 10, it is a possible exemplary block diagram of the communication device involved in this application. The device 1000 may exist in the form of software or hardware. The apparatus 1000 may include: a processing unit 1002 and a communication unit 1003. As an implementation manner, the communication unit 1003 may include a receiving unit and a sending unit. The processing unit 1002 is used to control and manage the actions of the device 1000. The communication unit 1003 is used to support communication between the device 1000 and other network entities. The device 1000 may further include a storage unit 1001 for storing program codes and data of the device 1000.

The processing unit 1002 may be a processor or a controller, for example, a CPU, a general-purpose processor, DSP, ASIC, FPGA, or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It can implement or execute various exemplary logical blocks, modules and circuits described in conjunction with the disclosure of this application. The processor may also be a combination for realizing computing functions, for example, including a combination of one or more microprocessors, a combination of a DSP and a microprocessor, and so on. The storage unit 1001 may be a memory. The communication unit 1003 is an interface circuit of the device for receiving signals from other devices. For example, when the device is implemented as a chip, the communication unit 1003 is an interface circuit for the chip to receive signals from other chips or devices, or an interface circuit for the chip to send signals to other chips or devices.

The device 1000 may be a user plane network element in any of the foregoing embodiments, and may also be a chip used for a user plane network element. For example, when the apparatus 1000 is a user plane network element, the processing unit 1002 may be, for example, a processor, and the communication unit 1003 may be, for example, a transceiver. Optionally, the transceiver may include a radio frequency circuit, and the storage unit may be, for example, a memory. For example, when the device 1000 is a chip for a user plane network element, the processing unit 1002 may be, for example, a processor, and the communication unit 1003 may be, for example, an input/output interface, a pin, or a circuit. The processing unit 1002 can execute computer-executable instructions stored in the storage unit. Optionally, the storage unit is a storage unit in the chip, such as a register, a cache, etc., and the storage unit may also be a storage unit located in the user plane network element. A storage unit outside the chip, such as ROM or other types of static storage devices that can store static information and instructions, RAM, etc.

In an embodiment, the device 1000 is a user plane network element, and the communication unit 1003 includes a sending unit and a receiving unit. The receiving unit is configured to receive a message of a TSN flow in a delay-sensitive network, the message including a destination MAC address; the processing unit 1002 is configured to determine a forwarding strategy of the TSN flow according to the destination MAC address, and the forwarding The policy includes the destination MAC address; the sending unit is configured to send the message according to the forwarding policy.

In a possible implementation method, the receiving unit is further configured to receive the forwarding strategy from a session management network element or an application function network element; or, to receive a message from a session management network element or an application function network element Forwarding path information, and determining the forwarding strategy according to the forwarding path information, where the forwarding path information includes the destination MAC address.

In a possible implementation method, the TSN stream is an upstream stream; the forwarding strategy further includes an identification of a sending port, and the sending port is a sending port of the device; and the sending unit is specifically configured to pass through The sending port sends the message.

In a possible implementation method, the forwarding strategy further includes an identifier of a VLAN; the processing unit 1002 is specifically configured to determine the forwarding strategy according to the destination MAC address and the identifier of the VLAN.

In a possible implementation method, the TSN stream is a downstream stream; the sending unit is specifically configured to send the message to the terminal device through the session corresponding to the forwarding strategy.

In a possible implementation method, the message includes priority information; the processing unit 1002 is further configured to determine a 5G service quality indicator 5QI according to the priority information; the sending unit is specifically configured to According to the 5QI, the message is sent to the terminal device through the session corresponding to the forwarding strategy.

In a possible implementation method, the forwarding strategy further includes auxiliary information, and the auxiliary information includes the identifier of the receiving port and/or the identifier of the virtual local area network VLAN;

The processing unit 1002 is specifically configured to determine the forwarding strategy according to the destination MAC address and the auxiliary information.

As shown in FIG. 11, it is a possible exemplary block diagram of the communication device involved in this application. The device 1100 may exist in the form of software or hardware. The apparatus 1100 may include: a processing unit 1102 and a communication unit 1103. As an implementation manner, the communication unit 1103 may include a receiving unit and a sending unit. The processing unit 1102 is used to control and manage the actions of the device 1100. The communication unit 1103 is used to support communication between the device 1100 and other network entities. The device 1100 may further include a storage unit 1101 for storing program codes and data of the device 1100.

The processing unit 1102 may be a processor or a controller, for example, a CPU, a general-purpose processor, DSP, ASIC, FPGA or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It can implement or execute various exemplary logical blocks, modules and circuits described in conjunction with the disclosure of this application. The processor may also be a combination for realizing computing functions, for example, including a combination of one or more microprocessors, a combination of a DSP and a microprocessor, and so on. The storage unit 1101 may be a memory. The communication unit 1103 is an interface circuit of the device for receiving signals from other devices. For example, when the device is implemented as a chip, the communication unit 1103 is an interface circuit used by the chip to receive signals from other chips or devices, or an interface circuit used by the chip to send signals to other chips or devices.

The device 1100 may be a core network device (such as a session management network element, a policy control network element) in any of the foregoing embodiments, and may also be a chip for a core network device. For example, when the apparatus 1100 is a core network device, the processing unit 1102 may be, for example, a processor, and the communication unit 1103 may be, for example, a transceiver. Optionally, the transceiver may include a radio frequency circuit, and the storage unit may be, for example, a memory. For example, when the apparatus 1100 is a chip for a core network device, the processing unit 1102 may be, for example, a processor, and the communication unit 1103 may be, for example, an input/output interface, a pin, or a circuit. The processing unit 1102 can execute computer-executable instructions stored in the storage unit. Optionally, the storage unit is a storage unit in the chip, such as a register, a cache, etc., and the storage unit may also be a core network device located in the chip. External storage units, such as ROM or other types of static storage devices that can store static information and instructions, RAM, etc.

In an embodiment, the apparatus 1100 is a core network device, and the communication unit 1103 includes a sending unit and a receiving unit. The receiving unit is configured to receive forwarding path information, where the forwarding path information includes the destination MAC address of the TSN flow; the processing unit is configured to determine the forwarding strategy of the TSN flow according to the destination MAC address; the sending unit is configured to send The forwarding strategy.

In a possible implementation method, the device is a policy control network element; the receiving unit is specifically configured to receive the forwarding path information from an application function network element or a session management network element; the sending unit is specifically It is used to send the forwarding strategy to the terminal device and/or the user plane network element through the session management network element.

In a possible implementation method, the processing unit 1102 is further configured to obtain the service type corresponding to the session of the terminal device; and determine the 5QI corresponding to the forwarding strategy according to the service type.

In a possible implementation method, the processing unit 1102 is specifically configured to obtain the service type corresponding to the session of the terminal device reported by the terminal device; or, to obtain all the information reported by the terminal device. The priority information corresponding to the session of the terminal device, and the service type is determined according to the priority information.

In a possible implementation method, the device is a session management network element; the receiving unit is specifically configured to receive the forwarding path information from an application function network element, a user plane network element, or a policy control network element; The sending unit is specifically configured to send the forwarding strategy to the terminal device and/or the user plane network element.

As shown in FIG. 12, a schematic diagram of a communication device provided in this application. The device may be a terminal device, a user plane network element, a session management network element, or a policy control network element in the foregoing embodiment. The device 1200 includes a processor 1202, a communication interface 1203, and a memory 1201. Optionally, the apparatus 1200 may further include a communication line 1204. Among them, the communication interface 1203, the processor 1202, and the memory 1201 may be connected to each other through a communication line 1204; the communication line 1204 may be a peripheral component interconnection standard (peripheral component interconnect, PCI for short) bus or an extended industry standard architecture (extended industry standard architecture) , Referred to as EISA) bus and so on. The communication line 1204 can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is used to represent in FIG. 12, but it does not mean that there is only one bus or one type of bus.

The processor 1202 may be a CPU, a microprocessor, an ASIC, or one or more integrated circuits used to control the execution of the program of the present application.

The communication interface 1203 uses any device such as a transceiver to communicate with other devices or communication networks, such as Ethernet, radio access network (RAN), wireless local area networks (WLAN), Wired access network, etc.

The memory 1201 may be ROM or other types of static storage devices that can store static information and instructions, RAM or other types of dynamic storage devices that can store information and instructions, or it can be an electrically erasable programmable read-only memory (electrically erasable programmable read-only memory). read-only memory, EEPROM), compact disc (read-only memory, CD-ROM) or other optical disc storage, optical disc storage (including compact discs, laser discs, optical discs, digital universal discs, Blu-ray discs, etc.), magnetic disks A storage medium or other magnetic storage device, or any other medium that can be used to carry or store desired program codes in the form of instructions or data structures and that can be accessed by a computer, but is not limited thereto. The memory can exist independently and is connected to the processor through the communication line 1204. The memory can also be integrated with the processor.

The memory 1201 is used to store computer-executed instructions for executing the solution of the present application, and the processor 1202 controls the execution. The processor 1202 is configured to execute computer-executable instructions stored in the memory 1201, so as to implement the communication method provided in the foregoing embodiment of the present application.

Optionally, the computer-executable instructions in the embodiments of the present application may also be referred to as application program code, which is not specifically limited in the embodiments of the present application.

A person of ordinary skill in the art can understand that the various digital 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. "And/or" describes the association relationship of the associated objects, indicating that there can be three types of relationships, for example, A and/or B, which can mean: A alone exists, A and B exist at the same time, and B exists alone. The character "/" generally indicates that the associated objects are in an "or" relationship. "At least one" means one or more. At least two means two or more. "At least one", "any one" or similar expressions refer to any combination of these items, including any combination of single item (a) or plural items (a). For example, at least one (piece, species) of a, b, or c can represent: a, b, c, ab, ac, bc, or abc, where a, b, and c can be single or Multiple. "Multiple" refers to two or more, and other measure words are similar. In addition, for elements in the singular form "a", "an" and "the", unless the context clearly dictates otherwise, it does not mean "one or only one", but means "one or more At one". For example, "a device" means to one or more such devices.

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 instructions. When the computer program instructions are loaded and executed on the computer, the processes or functions described in the embodiments of the present application are generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions may be transmitted from a website, computer, server, or data center. Transmission to another website site, 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, a magnetic tape), an optical medium (for example, a DVD), or a semiconductor medium (for example, a solid state disk (SSD)), etc.

The various illustrative logic units and circuits described in the embodiments of this application can be implemented by general-purpose processors, digital signal processors, application-specific integrated circuits (ASIC), field programmable gate arrays (FPGA) or other programmable logic devices, Discrete gates or transistor logic, discrete hardware components, or any combination of the above are designed to implement or operate the described functions. The general-purpose processor may be a microprocessor, and optionally, the general-purpose processor may also be any traditional processor, controller, microcontroller, or state machine. The processor can also be implemented by a combination of computing devices, such as a digital signal processor and a microprocessor, multiple microprocessors, one or more microprocessors combined with a digital signal processor core, or any other similar configuration achieve.

The steps of the method or algorithm described in the embodiments of the present application can be directly embedded in hardware, a software unit executed by a processor, or a combination of the two. The software unit can be stored in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, removable disk, CD-ROM or any other storage medium in the art. Exemplarily, the storage medium may be connected to the processor, so that the processor can read information from the storage medium, and can store and write information to the storage medium. Optionally, the storage medium may also be integrated into the processor. The processor and the storage medium can be arranged in the ASIC.

These computer program instructions can also be loaded on a computer or other programmable data processing equipment, so that a series of operation steps are executed on the computer or other programmable equipment to produce computer-implemented processing, so as to execute on the computer or other programmable equipment. The instructions provide steps for implementing functions specified in a flow or multiple flows in the flowchart and/or a block or multiple blocks in the block diagram.

Although the application has been described in combination with specific features and embodiments, it is obvious that various modifications and combinations can be made without departing from the spirit and scope of the application. Accordingly, this specification and drawings are merely exemplary descriptions of the application defined by the appended claims, and are deemed to have covered any and all modifications, changes, combinations or equivalents within the scope of the application. Obviously, those skilled in the art can make various changes and modifications to the application without departing from the scope of the application. In this way, if these modifications and variations of this application fall within the scope of the claims of this application and their equivalent technologies, this application is also intended to include these modifications and variations.

Claims

A communication method, characterized in that it comprises:

The core network device receives forwarding path information, where the forwarding path information includes the destination MAC address of the TSN stream and auxiliary information, and the auxiliary information is at least one of the following information: the identifier of the sending port, the identifier of the receiving port, and the virtual local area network VLAN The logo;

The core network device sends a forwarding strategy of the TSN flow, and the forwarding strategy includes the destination MAC address and the auxiliary information.
The method according to claim 1, wherein the core network device is a policy control network element;

The core network device receiving forwarding path information includes:

The core network device receives the forwarding path information from an application function network element or a session management network element;

The forwarding strategy for sending the TSN stream by the core network device includes:

The core network device sends the forwarding strategy to the terminal device and/or the user plane network element through the session management network element.
The method of claim 2, wherein the method further comprises:

Acquiring, by the core network device, the service type corresponding to the session of the terminal device;

The core network device determines the 5G service quality indicator 5QI corresponding to the forwarding strategy according to the service type.
The method according to claim 3, wherein the core network device acquiring the service type corresponding to the session of the terminal device comprises:

The core network device obtains the service type reported by the terminal device; or,

The core network device obtains priority information corresponding to the session of the terminal device reported by the terminal device, and determines the service type according to the priority information.
The method according to claim 1, wherein the core network device is a session management network element;

The core network device receiving forwarding path information includes:

The core network device receives the forwarding path information from an application function network element, a user plane network element, or a policy control network element;

The forwarding strategy for sending the TSN stream by the core network device includes:

The core network device sends the forwarding strategy to the terminal device and/or the user plane network element.
A communication method, characterized in that it comprises:

The user plane network element receives a packet of a TSN flow in a delay-sensitive network, and the packet includes a destination MAC address;

Determining, by the user plane network element, a forwarding strategy of the TSN flow according to the destination MAC address, where the forwarding strategy includes the destination MAC address;

The user plane network element sends the message according to the forwarding strategy.
The method of claim 6, further comprising:

The user plane network element receives the forwarding policy from the session management network element or the application function network element; or,

The user plane network element receives forwarding path information from a session management network element or an application function network element, and determines the forwarding strategy according to the forwarding path information, and the forwarding path information includes the destination MAC address.
The method according to claim 6 or 7, wherein the TSN flow is an upstream flow; the forwarding strategy further includes an identification of a sending port, and the sending port is a port on the user plane network element;

The user plane network element sending the message according to the forwarding strategy includes:

The user plane network element sends the message through the sending port.
The method according to claim 8, wherein the forwarding policy includes a forwarding rule FAR, and the FAR includes the identification of the sending port; or,

The forwarding strategy includes first indication information, and the first indication information is used to indicate the identification of the sending port or indicating the identification of the sending port and the destination MAC address.
The method according to claim 8 or 9, wherein the forwarding strategy further includes the identification of the virtual local area network VLAN;

The user plane network element determining a forwarding strategy according to the destination MAC address includes:

The user plane network element determines the forwarding strategy according to the destination MAC address and the identifier of the VLAN.
The method according to claim 6 or 7, wherein the TSN stream is a downstream stream; and the user plane network element sends the message according to the forwarding strategy, including:

The user plane network element sends the message to the terminal device through the session corresponding to the forwarding policy.
The method according to claim 11, wherein the message includes priority information; and the method further comprises:

The user plane network element determines a 5G service quality indicator 5QI according to the priority information;

The user plane network element sending the message to the terminal device through the session corresponding to the forwarding strategy includes:

The user plane network element sends the message to the terminal device through the session corresponding to the forwarding policy according to the 5QI.
The method according to claim 11 or 12, wherein the forwarding strategy further includes auxiliary information, and the auxiliary information includes the identifier of the receiving port and/or the identifier of the virtual local area network VLAN;

The user plane network element determining a forwarding strategy according to the destination MAC address includes:

The user plane network element determines the forwarding strategy according to the destination MAC address and the auxiliary information.
The method according to any one of claims 11-13, wherein the forwarding strategy includes a packet inspection rule PDR, the PDR includes auxiliary information, and the auxiliary information includes the identifier of the receiving port and/or the identifier of the VLAN; or,

The forwarding strategy includes second indication information, and the second indication information is used to indicate auxiliary information or used to indicate the auxiliary information and the destination MAC address.
A communication method, characterized in that it comprises:

The terminal device receives a packet of a TSN flow in a delay-sensitive network, where the packet includes a destination media access control MAC address;

Determining, by the terminal device, a forwarding strategy for the TSN flow according to the destination MAC address, where the forwarding strategy includes the destination MAC address;

The terminal device sends the message according to the forwarding strategy.
The method of claim 15, further comprising:

The terminal device receives the forwarding policy from a session management network element, a policy control network element, or a user plane network element.
The method according to claim 15 or 16, wherein the TSN stream is an upstream stream; and the terminal device sending the message according to the forwarding strategy includes:

The terminal device sends the message to the user plane network element through the session corresponding to the forwarding policy.
The method according to any one of claims 15-17, wherein the forwarding strategy further includes auxiliary information, and the auxiliary information includes the identifier of the receiving port and/or the identifier of the virtual local area network VLAN;

The terminal device determining the forwarding strategy according to the destination MAC address includes:

The terminal device determines the forwarding strategy according to the destination MAC address and the auxiliary information.
The method according to claim 15 or 16, wherein the TSN stream is a downstream stream; the forwarding strategy further includes an identification of a sending port, and the sending port is a sending port of the terminal device;

The terminal device sending the message according to the forwarding strategy includes:

The terminal device sends the message through the sending port.
The method according to any one of claims 15, 16, 19, wherein the forwarding strategy further includes a VLAN identification;

The terminal device determining the forwarding strategy according to the destination MAC address includes:

The terminal device determines the forwarding strategy according to the destination MAC address and the identifier of the VLAN.
A communication device, characterized by comprising:

The receiving unit is configured to receive forwarding path information, where the forwarding path information includes the destination MAC address of the TSN stream and auxiliary information, and the auxiliary information is at least one of the following information: the identification of the sending port, the identification of the receiving port, and the virtual The identification of the LAN VLAN;

The sending unit is configured to send a forwarding strategy of the TSN stream, where the forwarding strategy includes the destination MAC address and the auxiliary information.
The device according to claim 21, wherein the device is a policy control network element;

The receiving unit is specifically configured to receive the forwarding path information from an application function network element or a session management network element;

The sending unit is specifically configured to send the forwarding strategy to a terminal device and/or a user plane network element through the session management network element.
The apparatus according to claim 22, wherein the processing unit is further configured to obtain the service type corresponding to the session of the terminal device; and determine the 5QI corresponding to the forwarding strategy according to the service type.
The apparatus according to claim 23, wherein the processing unit is specifically configured to obtain the service type reported by the terminal device; or, to obtain the session of the terminal device reported by the terminal device Corresponding priority information, and determine the service type according to the priority information.
The device according to claim 21, wherein the device is a session management network element;

The receiving unit is specifically configured to receive the forwarding path information from an application function network element, a user plane network element, or a policy control network element;

The sending unit is specifically configured to send the forwarding strategy to a terminal device and/or a user plane network element.
A communication device, characterized by comprising:

A receiving unit, configured to receive a packet of a TSN flow in a delay-sensitive network, the packet including a destination MAC address;

A processing unit, configured to determine a forwarding strategy of the TSN stream according to the destination MAC address, where the forwarding strategy includes the destination MAC address;

The sending unit is configured to send the message according to the forwarding strategy.
The apparatus according to claim 26, wherein the receiving unit is further configured to receive the forwarding strategy from a session management network element or an application function network element; or, to receive a forwarding strategy from a session management network element or an application Forwarding path information of the functional network element, and determining the forwarding strategy according to the forwarding path information, and the forwarding path information includes the destination MAC address.
The device according to claim 26 or 27, wherein the TSN flow is an upstream flow; the forwarding strategy further includes an identification of a sending port, and the sending port is a port on the device;

The receiving unit is specifically configured to send the message through the sending port.
The apparatus according to claim 28, wherein the forwarding policy includes a forwarding rule FAR, and the FAR includes an identifier of the sending port; or,

The forwarding strategy includes first indication information, and the first indication information is used to indicate the identification of the sending port or indicating the identification of the sending port and the destination MAC address.
The device according to any one of claims 28 or 29, wherein the forwarding strategy further includes a VLAN identifier;

The processing unit is specifically configured to determine the forwarding strategy according to the destination MAC address and the identifier of the VLAN.
The apparatus according to claim 26 or 27, wherein the TSN stream is a downstream stream; the sending unit is specifically configured to send the message to the terminal device through the session corresponding to the forwarding strategy.
The device according to claim 31, wherein the message includes priority information; the processing unit is further configured to determine a 5G service quality indicator 5QI according to the priority information;

The sending unit is specifically configured to send the message to the terminal device through the session corresponding to the forwarding policy according to the 5QI.
The device according to claim 31 or 32, wherein the forwarding strategy further includes auxiliary information, and the auxiliary information includes the identifier of the receiving port and/or the identifier of the virtual local area network VLAN;

The processing unit is specifically configured to determine the forwarding strategy according to the destination MAC address and the auxiliary information.
The device according to any one of claims 31-33, wherein the forwarding strategy includes a packet inspection rule PDR, the PDR includes auxiliary information, and the auxiliary information includes the identifier of the receiving port and/or the identifier of the VLAN; or,

The forwarding strategy includes second indication information, and the second indication information is used to indicate auxiliary information or used to indicate the auxiliary information and the destination MAC address.
A communication device, characterized by comprising:

A receiving unit, configured to receive a message of a TSN flow in a delay-sensitive network, the message including a destination media access control MAC address;

A processing unit, configured to determine a forwarding strategy of the TSN stream according to the destination MAC address, where the forwarding strategy includes the destination MAC address;

The sending unit is configured to send the message according to the forwarding strategy.
The apparatus according to claim 35, wherein the receiving unit is further configured to receive the forwarding policy from a session management network element, a policy control network element, or a user plane network element.
The device according to claim 35 or 36, wherein the TSN stream is an upstream stream;

The sending unit is configured to send the message according to the forwarding strategy, which specifically includes:

It is used to send the message to the user plane network element through the session corresponding to the forwarding policy.
The device according to any one of claims 35-37, wherein the forwarding strategy further includes auxiliary information, and the auxiliary information includes the identifier of the receiving port and/or the identifier of the virtual local area network VLAN;

The processing unit is configured to determine the forwarding strategy of the TSN stream according to the destination MAC address, which specifically includes:

It is used to determine the forwarding strategy according to the destination MAC address and the auxiliary information.
The apparatus according to claim 35 or 36, wherein the TSN stream is a downstream stream; the forwarding strategy further includes an identification of a sending port, and the sending port is a sending port of the terminal device;

The sending unit is configured to send the message according to the forwarding strategy, which specifically includes:

Used to send the message through the sending port.
The device according to any one of claims 35, 36, 39, wherein the forwarding strategy further includes a VLAN identifier;

The processing unit is configured to determine the forwarding strategy of the TSN stream according to the destination MAC address, which specifically includes:

It is used to determine the forwarding strategy according to the destination MAC address and the identifier of the VLAN.
A core network device, comprising: a processor and a memory; the memory is used to store computer execution instructions, and when the core network device is running, the processor executes the computer execution stored in the memory Instructions to enable the core network device to execute the communication method according to any one of claims 1-5.
A user plane network element, characterized by comprising: a processor and a memory; the memory is used to store computer execution instructions, and when the user plane network element is running, the processor executes the The computer executes instructions to make the user plane network element execute the communication method according to any one of claims 6-14.
A terminal device, characterized by comprising: a processor and a memory; the memory is used to store computer execution instructions, and when the terminal device is running, the processor executes the computer execution instructions stored in the memory, So that the terminal device executes the communication method according to any one of claims 15-20.
A processing device, characterized in that it comprises:

Memory, used to store computer programs;

The processor is configured to call and run the computer program from the memory to execute the communication method according to any one of claims 1-5.
A processing device, characterized in that it comprises:

Memory, used to store computer programs;

The processor is configured to call and run the computer program from the memory to execute the communication method according to any one of claims 6-14.
A processing device, characterized in that it comprises:

Memory, used to store computer programs;

The processor is configured to call and run the computer program from the memory to execute the communication method according to any one of claims 15-20.
A chip system, characterized in that it includes:

Memory, used to store computer programs;

The processor is configured to call and run the computer program from the memory, so that the device installed with the chip system executes the communication method according to any one of claims 1-5.
A chip system, characterized in that it includes:

Memory, used to store computer programs;

The processor is configured to call and run the computer program from the memory, so that the device installed with the chip system executes the communication method according to any one of claims 6-14.
A chip system, characterized in that it includes:

Memory, used to store computer programs;

The processor is configured to call and run the computer program from the memory, so that the device installed with the chip system executes the communication method according to any one of claims 15-20.
A computer-readable storage medium, characterized by comprising a computer program, which when running on a computer, causes the computer to execute the communication method according to any one of claims 1-20.
A computer program product, characterized in that the computer program product comprises a computer program, and when the computer program runs on a computer, the computer is caused to execute the communication method according to any one of claims 1-20.
A communication system, characterized by comprising a core network device for executing the communication method according to any one of claims 1-5, and a user plane network element for executing the communication method according to any one of claims 6-14.