Network bridge construction and discovery method and device, computer equipment and storage medium

Abstract

The invention provides a network bridge construction and discovery method and device, computer equipment and a storage medium, different network modes can be configured in a UPF node in advance, protocol stack compositions of the UPF node are different in the different network modes, and when terminal equipment sends a PDU session establishment request, the protocol stack compositions of the UPF node are different. According to the embodiment of the invention, the first indication information for indicating the mode type of the TSN bridge to be built can be carried, so that the construction and discovery of the TSN bridge can be carried out in the target network mode corresponding to the first indication information. The same UPF node can be configured with multiple network modes, and a corresponding TSN network bridge can be constructed in each network mode, so that a plurality of TSN network bridges can be borne by one UPF node based on the method; besides, the protocol stack compositions of the UPF node in different network modes are different, so that the 5G TSN network bridge constructed based on the method provided by the invention can support diversified constellation protocol system heterogeneous networking.

Description

Technical Field

[0001] This application relates to the field of communications, and in particular, to a method, apparatus, computer device, and storage medium for bridge construction and discovery. Background Art

[0002] With the development of the 5th Generation Mobile Communication Technology (5G), both the accuracy and transmission efficiency of data transmission have been significantly improved. By leveraging the wireless communication capabilities of 5G, 5G Time Sensitive Networking (TSN) bridges break through the limitations of traditional wired networks, achieving broader network coverage and more flexible network deployment, and playing an important role in fields such as the deployment of industrial Internet park networks and 5G industrial private networks. Summary of the Invention

[0003] In view of this, this application provides a method, apparatus, computer device, and storage medium for bridge construction and discovery.

[0004] Specifically, this application adopts the following technical solutions: This application provides a method for bridge construction and discovery. The method is applied to a Session Management Function (SMF) node, and the method includes: Receiving a Packet Data Unit (PDU) session establishment request sent by a terminal device. The PDU session establishment request carries first indication information, and the first indication information is used to indicate the modal type of the Time Sensitive Networking (TSN) bridge to be built. Under different network modalities, the protocol stack composition of the User Plane Function (UPF) node is different; Obtaining bridge information that matches the target network modality under the modal type, and constructing and discovering a TSN bridge based on the bridge information. The bridge information includes the identifier of the UPF instance carrying the target network modality, and different UPF instances are used to carry TSN bridges under different network modalities.

[0005] Optionally, the SMF node includes pre-configured first network modality information of the UPF node under each network modality, and second network modality information of the Data Network (DN) node under each network modality; The method further includes determining the target network modality according to the following method: When the address of the DN node is carried in the PDU session establishment request, determining the network modality of the DN node based on the address of the DN node, and determining the target network modality based on the network modality of the DN node and the correspondence between the first network modality information and the second network modality information. In the case where the address of the DN node is not carried in the PDU session establishment request, based on the pre-configured second network mode information, the mode type, and the service type of the terminal device, determine the network mode of the DN node, and based on the network mode of the DN node and the corresponding relationship, determine the target network mode.

[0006] Optionally, the network mode information includes a network mode identifier; After determining the target network mode, the method further includes: Send a session policy creation request carrying the target network mode identifier of the target network mode to a Policy Control Function (PCF) node; Receive a policy control request trigger condition sent by the PCF node, where the policy control request trigger condition includes a target trigger condition for instructing the SMF node to report the bridge information in the target network mode to the PCF node.

[0007] Optionally, the PDU session establishment request also carries the Media Access Control (MAC) address of the DS-TT deployed by the terminal device; Discovering a TSN bridge based on the bridge information includes: After obtaining the bridge information matching the target network mode, in response to the target trigger condition being triggered, send the bridge information and the MAC address of the DS-TT to the PCF node, so as to instruct the PCF to report the bridge information and the MAC address of the DS-TT to a TSN Application Function (AF) network element.

[0008] Optionally, obtaining the bridge information matching the target network mode includes: Send a Packet Forwarding Control Protocol (PFCP) session establishment request carrying the network mode identifier of the network mode of the DN node to the UPF node; Receive a PFCP session establishment response sent by the UPF node and carrying the bridge information.

[0009] Optionally, the bridge information further includes: The port number of the Data Source Time-Sensitive Network Translator (DS-TT) allocated by the UPF node on the terminal side, the port number of the Network Time-Sensitive Network Translator (NW-TT) on the network side, and the TSN bridge identifier; Constructing a TSN bridge based on the bridge information includes: Send the DS-TT port number to the terminal device.

[0010] This application also provides a method for bridge construction and discovery. The method is applied to a terminal device, and the method includes: Send a PDU session establishment request to the SMF node, where the PDU session establishment request carries first indication information for indicating a target network mode of a time-sensitive network (TSN) bridge to be built corresponding to the terminal device. Under different network modes, the protocol stack composition of the user plane function (UPF) node is different; Receive the DS-TT port number sent by the SMF node.

[0011] This application also provides a method for bridge construction and discovery. The method is applied to a PCF node and includes: Receive a session policy creation request sent by the SMF node; where the session policy creation request carries a target network mode identifier of the target network mode of the UPF node. The UPF node is pre-configured with multiple network modes, and under different network modes, the protocol stack composition of the UPF node is different; Send a policy control request trigger condition to the SMF node. The policy creation request trigger condition includes a target trigger condition for instructing the SMF node to report bridge information in the target network mode to the PCF node; Receive the target bridge information sent by the SMF node after the target trigger condition is triggered, and perform discovery of the TSN bridge based on the target bridge information; where the target bridge information includes the bridge information allocated by the UPF node and the MAC address of the DS-TT sent by the terminal device to the SMF node.

[0012] Optionally, the performing discovery of the TSN bridge based on the target bridge information includes: Report the target bridge information and the target network mode identifier corresponding to the target bridge information to the TSN-AF node; Create an AF session related to the TSN bridge in the target network mode, and subscribe to TSN events on the AF session; Determine the transmission delay information of the TSN bridge in the target network mode, and report the transmission delay information to the TSN-AF node.

[0013] This application also provides a method for bridge construction and discovery. The method is applied to a UPF node. The UPF node is pre-configured with multiple network modes, and under different network modes, the protocol stack composition of the UPF node is different. The method includes: Receive a packet forwarding control protocol (PFCP) session establishment request sent by the SMF node carrying a network mode identifier of the DN node's network mode; Determine the target network mode of the UPF node corresponding to the network mode of the DN node; Determine the bridge information in the target network mode and send the bridge information to the SMF node.

[0014] This application also provides a bridge construction and discovery device, which is applied to the SMF node. The device includes: A first receiving module, configured to receive a PDU session establishment request sent by a terminal device. The PDU session establishment request carries first indication information for indicating the modal type of the TSN bridge to be built. Under different network modes, the protocol stack composition of the UPF node is different. A processing module, configured to obtain bridge information matching the target network mode of the modal type and perform construction and discovery of the TSN bridge based on the bridge information. The bridge information includes the identifier of the UPF instance carrying the target network mode, and different UPF instances are used to carry the TSN bridges under different network modes.

[0015] This application also provides a bridge construction and discovery device, which is applied to the terminal device. The device includes: A first sending module, configured to send a PDU session establishment request to the SMF node. The PDU session establishment request carries first indication information for indicating the target network mode of the time-sensitive network (TSN) bridge to be built corresponding to the terminal device. Under different network modes, the protocol stack composition of the user plane function (UPF) node is different. A second receiving module, configured to receive the DS-TT port number sent by the SMF node.

[0016] This application also provides a bridge construction and discovery device, which is applied to the PCF node. The device includes: A third receiving module, configured to receive a session policy creation request sent by the SMF node. The session policy creation request carries the target network mode identifier of the target network mode of the UPF node. The UPF node is pre-configured with multiple network modes, and under different network modes, the protocol stack composition of the UPF node is different. A second sending module, configured to send a policy control request trigger condition to the SMF node. The policy creation request trigger condition includes a target trigger condition for instructing the SMF node to report the bridge information in the target network mode to the PCF node. A fourth receiving module, configured to receive target bridge information sent by the SMF node after the target trigger condition is triggered, and discover a TSN bridge based on the target bridge information; wherein, the target bridge information includes the bridge information allocated by the UPF node and the MAC address of the DS-TT sent by the terminal device to the SMF node.

[0017] This application also provides a bridge construction and discovery device, which is applied to a UPF node. The UPF node is pre-configured with multiple network modes, and the protocol stack of the UPF node is different in different network modes. The device includes: A fifth receiving module, configured to receive a Packet Forwarding Control Protocol (PFCP) session establishment request carrying a network mode identifier of the DN node sent by the SMF node; A determination module, configured to determine a target network mode of the UPF node corresponding to the network mode of the DN node; A third sending module, configured to determine bridge information in the target network mode and send the bridge information to the SMF node.

[0018] This application provides a computer-readable storage medium, which stores a computer program. When the computer program is executed by a processor, the above-mentioned bridge construction and discovery method is implemented.

[0019] This specification provides a computer device, including a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the program, the above-mentioned bridge construction and discovery method is implemented.

[0020] The method provided by this application can pre-configure different network modes on the UPF node. In different network modes, the protocol stack of the UPF node is different. When the terminal device sends a PDU session establishment request, it can carry first indication information indicating the modal type of the TSN bridge to be built. In this way, the construction and discovery of the TSN bridge can be performed in the target network mode corresponding to the first indication information. Since the same UPF node can be configured with multiple network modes, and a corresponding TSN bridge can be built in each network mode, therefore, based on this method, multiple TSN bridges can be carried by one UPF node; in addition, since the protocol stack composition of the UPF node is different in different network modes, the 5G TSN bridge constructed based on the method provided by this application can support heterogeneous networking of diverse constellation protocol systems. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a network architecture of a 5G network as a TSN bridge shown in an exemplary embodiment of this application; Figure 2 It is a schematic diagram of the protocol stack composition of a UPF shown in an exemplary embodiment of the present application; Figure 3 It is a flowchart of the construction and discovery process of a 5G TSN bridge shown in an exemplary embodiment of the present application; Figure 4 It is an interaction flowchart of a bridge construction and discovery method shown in an exemplary embodiment of the present application; Figure 5 It is the network architecture of a 5G TSN bridge shown in an exemplary embodiment of the present application; Figure 6 It is a flowchart of a bridge construction and discovery method shown in an exemplary embodiment of the present application; Figure 7 It is a flowchart of another bridge construction and discovery method shown in an exemplary embodiment of the present application; Figure 8 It is a flowchart of another bridge construction and discovery method shown in an exemplary embodiment of the present application; Figure 9 It is a flowchart of another bridge construction and discovery method shown in an exemplary embodiment of the present application; Figure 10 It is a schematic diagram of a bridge construction and discovery device shown in an exemplary embodiment of the present application; Figure 11 It is a schematic diagram of another bridge construction and discovery device shown in an exemplary embodiment of the present application; Figure 12 It is a schematic diagram of another bridge construction and discovery device shown in an exemplary embodiment of the present application; Figure 13 It is a schematic diagram of another bridge construction and discovery device shown in an exemplary embodiment of the present application; Figure 14 It is a schematic diagram of the structure of a computer device shown in an exemplary embodiment of the present application. Detailed implementation manners

[0022] Here, the exemplary embodiments will be described in detail, and the examples are shown in the accompanying drawings. When the following description refers to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementation manners described in the following exemplary embodiments do not represent all implementation manners consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0023] The terms used in this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The singular forms "a", "the", and "said" used in this application and the appended claims are also intended to include the plural forms unless the context clearly dictates otherwise. It should also be understood that the term "and / or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

[0024] It should be understood that although the terms first, second, third, etc. may be used in this application to describe various information, such information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of this application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the word "if" as used herein may be interpreted as "when" or "while" or "in response to a determination".

[0025] In the existing satellite-ground integrated network, due to the fragmented state of the constellation satellite protocol stack, the coexistence of multiple protocols makes it difficult to communicate between the satellite and the ground and among satellites. Data is deposited on each fragmented independent satellite, making it difficult to realize the value of satellite-ground integrated data collaboration.

[0026] The 5G TSN bridge realizes a wider network coverage and a more flexible network deployment by integrating 5G and TSN. See Figure 1 As shown, it is a network architecture of a 5G network as a TSN bridge provided by an embodiment of this application. Each bridge is composed of a device-side time-sensitive network translator (DS-TT), a user equipment (UE), a radio access network (RAN), a user plane function (UPF), and a network-side time-sensitive network translator (NW-TT).

[0027] Here, each UPF has only one node identifier (Node ID), and the Node ID is bound to the bridge identifier of the TSN bridge. Therefore, each Node ID can only carry one TSN bridge. As Figure 1 shown, UPF-A carries 5G bridge A, and UPF-B carries 5G bridge B.

[0028] The protocol stack composition of the 5G UPF is fixed. Exemplarily, see Figure 2As shown in the figure, a schematic diagram of the protocol stack composition of a UPF provided by this application is given, including Layer 1: Physical Layer (PHY), such as microwave / laser, Layer 2: Ethernet protocol, Layer 3: IP layer, Layer 4: User Datagram Protocol (UDP) layer, Layer 5: General Packet Radio Service Tunneling Protocol Control Plane (GPRS Tunneling Protocol Control Plane, GTP-C) / General Packet Radio Service Tunneling Protocol User Plane (GPRS Tunneling Protocol - User Plane, GTP-U), Layer 6: Packet Forwarding Control Protocol (PFCP).

[0029] In the prior art, NW-TT is deployed on the UPF side, and the NW-TT port number is configured to the UPF in a pre-configured form. Each 5G TSN bridge uses a Protocol Data Unit Session (PDU session) to bind with the DS-TT port number, the Media Access Control Address (MAC address) of DS-TT, and the NW-TT port number to jointly carry the uplink and downlink TSN service data.

[0030] See Figure 3 As shown in the figure, a flowchart of the construction and discovery process of a 5G TSN bridge provided by this application includes the following steps: Step 1: The UE sends a PDU session establishment request to the Session Management Function (SMF).

[0031] Among them, the PDU session establishment request carries the MAC address of DS-TT and the PDU session type (Ethernet). In addition, the PDU session establishment request can also carry a Support Port Management Information Container (PMIC) identifier to obtain the DS-TT port number allocated by the UPF. Specifically, the UE can send the PDU session establishment request to the SMF node through the Next Generation Node B (gNB) node shown in Figure 3 the figure.

[0032] Step 2: The SMF obtains the trigger conditions for the new bridge discovery report for carrying the TSN bridging service from the PCF through the session policy creation (Npcf_SMPolicyControl_Create) process.

[0033] Here, the trigger conditions for the bridge discovery report can be understood as the conditions under which the SMF node needs to report bridge information to the PCF node for the subsequent bridge discovery process.

[0034] Exemplarily, the trigger conditions for the bridge discovery report can be: after obtaining the DS-TT port number, NW-TT port number, and bridge identifier from the UPF, report to the PCF node.

[0035] Step 3: The SMF node requests and obtains the DS-TT port number, NW-TT port number, and the node identifier / bridge identifier (Bridge ID) of the UPF assigned by the UPF node through the Packet Forwarding Control Protocol (PFCP) session establishment process.

[0036] Step 4: The SMF node returns the assigned DS-TT port number to the UE through the PDU session establishment response.

[0037] Step 5: The SMF node reports the bridge information to the PCF node through the PCF policy update process (Npcf_SMPolicyControl_Update).

[0038] The bridge information reported here includes the DS-TT port number, NW-TT port number, the node identifier / bridge identifier (Bridge ID) of the UPF, and the MAC address of DS-TT.

[0039] Step 6: After receiving the bridge information reported by the SMF node, the PCF node reports the bridge information to the TSN Application Function (TSN-AF) through the Npcf_PolicyAuthorizationNotify process.

[0040] Step 7: A new AF session is created between the PCF node and the TSN-AF node, and the AF session is bound to the bridge information.

[0041] Step 8: Configure the bridge and obtain the transmission delays on the DS-TT and NW-TT sides of the TSN bridge.

[0042] Step 9: The PCF node reports the obtained transmission delays to the TSN-AF.

[0043] Step 10: Carry the uplink and downlink services of TSN according to the transmission characteristics of the TSN bridge.

[0044] As can be seen from the above steps, since the TSN bridge is bound to the UPF node identifier, therefore, a UPF node can only carry one TSN bridge, and the existing 5G TSN bridge depends on the fixed protocol stack of the UPF to form. The protocol stack composition of the UPF node causes the UE to only support the establishment of a standard Ethernet type PDU session pipeline. Therefore, the existing 5G TSN bridge cannot be compatible with the heterogeneous networking of diverse constellation protocol systems.

[0045] Based on this, the present application provides a method for bridge construction and discovery. Different network modes can be pre-configured on the UPF node. In different network modes, the protocol stack composition of the UPF node is different. When the terminal device sends a PDU session establishment request, it can carry the first indication information indicating the modal type of the TSN bridge to be built. In this way, the construction and discovery of the TSN bridge can be carried out in the target network mode corresponding to the first indication information. Since a single UPF node can be configured with multiple network modes, and a corresponding TSN bridge can be built under each network mode, therefore, based on this method, multiple TSN bridges can be carried by one UPF node; in addition, since the protocol stack composition of the UPF node is different in different network modes, therefore, the 5G TSN bridge constructed based on the method provided by the present application can support the heterogeneous networking of diverse constellation protocol systems.

[0046] The following will introduce in detail the method for bridge construction and discovery provided by the present application in combination with specific embodiments.

[0047] See Figure 4 As shown, it is an interaction flowchart of a method for bridge construction and discovery provided by the present application. The nodes involved in this interaction flowchart include the terminal device (i.e., UE) deploying DS-TT, the SMF node, the PCF node, the TSN-AF node, the UPF node deploying NW-TT, and the data network (Date Network, DN). In addition, other nodes may also be involved, such as the gNB node, which is not shown in detail in the figure.

[0048] The specific process of this method includes the following steps: Step 1: The UE sends a PDU session establishment request to the SMF node.

[0049] Among them, the PDU session establishment request carries the first indication information, which is used to indicate the modal type of the TSN bridge to be built. In different network modes, the protocol stack composition of the UPF node is different.

[0050] Here, the modal types of the TSN bridge can include the default modality and non-default modalities. In the default modality, the protocol stack composition of the UPF node can be in the default form, for example, it can be the composition form shown in Figure 2 ; in the non-default modality, the protocol stack composition of the UPF node can be different from the default form. For example, in the non-default modality m, the protocol stack composition of the UPF node can be: Layer 1: Physical layer, Layer 2: Non-standard Ethernet protocol, Layer 3: Gateway layer, Layer 4: UDP layer, Layer 5: GTP-C / GTP-U, Layer 6: PFCP. In practical applications, the UPF node can be pre-configured with multiple network modalities according to requirements.

[0051] In addition, the MAC address of the DS-TT and the support PMIC transmission identifier can also be carried in the PDU session establishment request.

[0052] Optionally, the cell structure of the PDU session establishment request is as shown in Table 1 below, and the first indication information can be carried in the PDU session type cell of the PDU session establishment request. When the first indication information indicates a non-default modality, exemplarily, the modalized PDU session type "Network Modality" can be added to the "PDU session type value" (the cell structure is as shown in Table 3 below) carried in the "PDU Session Type" cell (the cell structure is as shown in Table 2 below), and the original value is reserved as "1 1 1" to refer to the newly added PDU session type. Here, the newly added PDU session type can be understood as the modal type of the TSN bridge.

[0053] Table 1: Cell structure of the PDU session establishment request

[0054] Table 2: Cell structure of PDU session type

[0055] Table 3: Cell structure of PDU session type value

[0056] After receiving the PDU session establishment request, the SMF node can first determine the target modal type in the modal type indicated by the first indication type, and then build and discover the TSN bridge in the target modal type.

[0057] In an embodiment of the present application, the SMF node includes pre-configured first network mode information of the UPF node in each network mode and second network mode information of the DN node in each network mode. Here, the network modes of the UPF node and the DN node are in one-to-one correspondence. The network mode information may include, for example, a network mode identifier, protocol stack composition information in each network mode, etc.

[0058] When determining the target network mode information, it can be divided into the following two cases: Case 1: When the address of the DN node is carried in the PDU session establishment request, based on the address of the DN node, determine the network mode of the DN node, and based on the network mode of the DN node and the corresponding relationship between the first network mode information and the second network mode information, determine the target network mode.

[0059] Here, the corresponding relationship between the addresses of each DN node and the network mode can be pre-configured in the SMF node.

[0060] Case 2: When the address of the DN node is not carried in the PDU session establishment request, based on the pre-configured second network mode information, the mode type, and the service type of the terminal device, determine the network mode of the DN node, and based on the network mode of the DN node and the corresponding relationship, determine the target network mode.

[0061] Specifically, when determining the network mode of the DN node based on the pre-configured second network mode information, the mode type, and the service type of the terminal device, if the mode type indicated by the first indication information is the default mode, the default mode type can be directly used as the mode type of the DN node; if the mode type indicated by the first indication information is a non-default mode, the network mode of the DN node can be determined according to the service type of the terminal device and the pre-configured second network mode information.

[0062] In another embodiment, the service data of the terminal device may not be sent to the DN node, but may be sent to a network slice. In this case, the information pre-configured by the SMF node also includes third mode information of the network slice in each network mode; if the network slice identifier is carried in the PDU session establishment request, the mode information corresponding to the network slice can be determined based on the corresponding relationship between each network slice identifier and the network mode pre-configured in the SMF node, and then the target network mode can be determined based on the corresponding relationship between the mode information of the network slice and the first mode information. If the network slice identifier is not carried in the PDU session establishment request, the mode information of the network slice can be determined as the default mode, and the target network mode can be determined based on the service type of the terminal device.

[0063] Here, it should be noted that if the service data of the terminal device is sent to the network slice, all subsequent interaction processes with the DN node described in this application can interact with the network slice to achieve similar technical effects. For example, when the SMF node determines the bridge information, it is determined based on the network modality of the network slice. The subsequent steps refer to the following embodiments and will not be elaborated here.

[0064] Step 2: Obtain the trigger condition for reporting bridge information in the target network modality.

[0065] Specifically, the SMF node can send a session policy creation request carrying the target network modality identifier of the target network modality to the PCF node, and then receive the policy control request trigger condition sent by the PCF node. The policy control request trigger condition includes a target trigger condition indicating that the SMF node reports the bridge information in the target network modality to the PCF node.

[0066] Exemplarily, the SMF node can add a modality bridge policy acquisition indication (here, it refers to the trigger condition acquisition indication for reporting the bridge information in the target network modality) to the "session policy context data (SmPolicyContextData)" carried in the session policy creation request (Npcf_SMPolicyControl_Createrequest), and then obtain the target trigger condition included in the policyCtrlReqTriggers (i.e., the policy control request trigger condition) from the PCF.

[0067] Specifically, an element "EnableNetworkModalityforTSC" can be added to the SmPolicyContextData to indicate that the PCF node currently requires network modality discovery capabilities for the PDU session of the TSN bridge. Here, the network modality discovery capabilities can be understood as the discovery capabilities of the network modality in the non-default modality.

[0068] After detecting that "EnableNetworkModalityforTSC = True", the PCF node can add an element "TSN_BRIDGE_INFO_NW" to the policyCtrlReqTriggers to indicate the reporting of the TSN bridge information in the non-default modality.

[0069] Step 3: Obtain the bridge information matching the target network modality.

[0070] Here, the obtained bridge information includes the identifier of the UPF instance carrying the target network modality. Different UPF instances are used to carry TSN bridges under different network modalities, and also includes the DS-TT port number, NW-TT port number, and TSN bridge identifier allocated by the UPF node.

[0071] Optionally, when obtaining bridge information matching the target network modality, a Packet Data Unit Session Path Control Protocol (PFCP) session establishment request carrying the network modality identifier of the DN node can be sent to the UPF node; then, a PFCP session establishment response carrying the bridge information is received from the UPF node.

[0072] Exemplarily, the SMF node can carry an enhanced "Create Bridge / routerInfo" cell with network modality indication in the PFCP Session Establishment Request, and then send the PFCP Session Establishment Request to the UPF.

[0073] The cell structure of Create Bridge / router Info is shown in Table 4 below. By adding a "Network Modality (NM)" cell structure to the "Create TSC Bridge Information" cell defined in TS29.244, it indicates the network modality-based TSC bridge discovery method.

[0074] Table 4: Cell Structure of Create Bridge / router Info

[0075] In Table 4 above, the 3rd bit of the 5th octet: If "NM" is set to "1" and the 1st bit of the 5th octet, "Bridge Information Indicator (BII)", is set to "1", it indicates that the UPF node reports the allocated DS-TT / NW-TT port number, and the corresponding bridge identifier (Bridge ID) and other bridge information of the bound network modality. The 8 bits of the 6th to 7th octets: The network modality value (Network Modality Value), which is used to transfer the pre-configured DN-side network modality value on the SMF side to the user plane UPF. For example, if the network modality of the DN node is modality m, then the value of Network Modality Value is m.

[0076] The UPF responds to the network modality-enabled TSC bridge discovery indication of the SMF (the NM identification bit in Table 4 above) by carrying an enhanced "Created NM Bridge Info for TSC" cell structure with network modality indication in the PFCP Session Establishment Response.

[0077] Among them, the "Created NM Bridge Info for TSC" cell structure contains three cell structures: "Network Modality Instance Identifier (NMInstanceId)", "Network Modality Info", and "Created Bridge / Router Info".

[0078] Network Modality Instance Identifier (NMInstanceId): It is used to indicate the UPF instance carrying the current network modality (i.e., the target network modality); Network Modality: It adopts the "Network Modality Info" cell structure, which is used to indicate the network modality composition information of the current TSN bridge, and indicates the network modality information pre-synchronized and configured on the SMF side and the UPF side in the form of "Network Modality Value"; Created Bridge / Router Info: It is used to indicate the DS-TT and NW-TT port information of the modalized bridge corresponding to the network modality instance identifier (NMInstanceId) carrying the network modality information (Network Modality Info) under the bridge identifier (Bridge ID) of the current UPF.

[0079] Step 4: The SMF node sends the DS-TT port number allocated by the UPF to the UE.

[0080] Here, the SMF node can send a PDU session establishment response to the UE and carry the DS-TT port number in the PDU session establishment response.

[0081] After sending the DS-TT port number to the UE, the TSN bridge in the target network modality is built. However, after the TSN bridge is built, it needs to go through subsequent discovery processes for TSN bridge configuration and AF binding before it can be used for business data transmission.

[0082] Step 5: The SMF node sends the bridge information allocated by the UPF node and the MAC address of the DS-TT to the PCF node.

[0083] Here, after receiving the bridge information allocated by the UPF node, the SMF node triggers the above-mentioned target trigger condition. Then, in response to the triggering of the target trigger condition, the SMF node can send the bridge information allocated by the UPF node and the MAC address of the DS-TT to the PCF node.

[0084] Exemplarily, the SMF node can report the discovery of the above information by carrying the enhanced session policy update context data (SmPolicyUpdateContextData) cell in the session policy update request (Npcf_SMPolicyControl_Update request).

[0085] Step 6: The PCF node reports the bridge information, the MAC address of the DS-TT, and the corresponding target network modality identifier to the TSN-AF node.

[0086] Exemplarily, the PCF node can report the above information to the TSN-AF node through the Npcf_PolicyAuthorization_Notify process.

[0087] Step 7: The PCF node creates an AF session related to the TSN bridge in the target network modality with the TSN-AF node and subscribes to TSN events on the AF session.

[0088] Exemplarily, an AF session related to the TSN bridge in the target network mode can be created between the PCF node and the TSN-AF node through the Npcf_PolicyAuthorization_Create / Subscribe procedure, and TSN events on the AF session can be subscribed to.

[0089] In addition, the PCF node can also bind the newly created AF session, PDU session, and the established TSN bridge.

[0090] Step 8: Configure the established TSN bridge and obtain the DS-TT and NW-TT transmission delay information of the TSN bridge in the target network mode.

[0091] Exemplarily, the TSN-AF node configures the newly discovered TSN bridge through the PFCP Session Modification procedure and PDU Session Modification procedure defined by the Npcf_PolicyAuthorization_Update procedure, and obtains the NW-TT and DS-TT transmission delay information of the TSN bridge through the Npcf_PolicyAuthorization_Notify system procedure.

[0092] Step 9: The PCF node reports the NW-TT and DS-TT transmission delay information to the TSN-AF node.

[0093] Step 10: Carry the uplink and downlink services of TSN according to the transmission characteristics of the TSN bridge.

[0094] Here, the discovery process of the TSN bridge in the target network mode is completed. By binding the MAC address of DS-TT, DS-TT port number, NW-TT port number, UPF node identifier / bridge identifier, UPF network mode (protocol stack composition of UPF), instance identifier carrying the UPF network mode, and NW-TT and DS-TT transmission delay information, the 5G-TSN bridge is successfully constructed and discovered, and can be used to carry the uplink and downlink services of TSN.

[0095] Combined with the above Figure 4 provided method, referring to Figure 5 as shown Figure 5A network architecture of a 5G TSN bridge provided by an embodiment of the present application. Based on the existing TSN bridge information (DS-TT port number, MAC address of DS-TT, NW-TT port number, UPF node identifier / bridge identifier) constituted by a standard Ethernet protocol stack, the network mode dimension information (i.e., the instance identifier of the network mode carrying the UPF) is added, so that the original single UPF node that can only support a single TSN bridge is extended to support multi-modal TSN bridges simultaneously. Figure 5 In this case, the instance of mode 1 of UPF-A is used to carry bridge A, and the instance of mode 2 of UPF-A is used to carry bridge B.

[0096] In the method provided by the present application, the bridge identifier and the UPF instance identifier carrying the network mode jointly perform the role of the bridge identifier in the original method.

[0097] In the above method, since the same UPF node can be configured with multiple network modes, and a corresponding TSN bridge can be constructed under each network mode. Therefore, based on this method, multiple TSN bridges can be carried by one UPF node; in addition, since the protocol stack compositions of different network modes of the UPF node are different, the 5G TSN bridge constructed based on the method provided by the present application can support heterogeneous networking of diverse constellation protocol systems.

[0098] Based on the same concept, the present application also provides a method for bridge construction and discovery. This method is applied to an SMF node. Refer to Figure 6 The figure shows a flowchart of a method for bridge construction and discovery provided by the present application, including the following steps: S601. Receive a PDU session establishment request sent by a terminal device. Among them, the PDU session establishment request carries first indication information, and the first indication information is used to indicate the modal type of the TSN bridge to be built; under different network modes, the protocol stack compositions of UPF nodes are different.

[0099] S602. Obtain bridge information that matches the target network mode under the modal type, and perform construction and discovery of the TSN bridge based on the bridge information; among them, the bridge information includes the identifier of the UPF instance carrying the target network mode, and different UPF instances are used to carry TSN bridges under different network modes.

[0100] In a possible implementation manner, the SMF node includes the first network mode information of the pre-configured UPF node in each network mode, and the second network mode information of the data network DN node in each network mode; The method further includes determining the target network mode according to the following method: When the address of the DN node is carried in the PDU session establishment request, based on the address of the DN node, determine the network mode of the DN node, and based on the network mode of the DN node and the correspondence between the first network mode information and the second network mode information, determine the target network mode; When the address of the DN node is not carried in the PDU session establishment request, based on the pre-configured second network mode information, the mode type, and the service type of the terminal device, determine the network mode of the DN node, and based on the network mode of the DN node and the correspondence, determine the target network mode.

[0101] In a possible implementation manner, the network mode information includes a network mode identifier; After determining the target network mode, the method further includes: Send a session policy creation request carrying the target network mode identifier of the target network mode to a policy control function PCF node; Receive a policy control request trigger condition sent by the PCF node, where the policy control request trigger condition includes a target trigger condition for instructing the SMF node to report bridge information in the target network mode to the PCF node.

[0102] In a possible implementation manner, the PDU session establishment request further carries the media access control address MAC address of the DS-TT deployed by the terminal device; Based on the bridge information, perform discovery of the TSN bridge, including: After obtaining bridge information matching the target network mode, in response to the target trigger condition being triggered, send the bridge information and the MAC address of the DS-TT to the PCF node, so as to instruct the PCF to report the bridge information and the MAC address of the DS-TT to a TSN application function network element AF.

[0103] In a possible implementation manner, the obtaining bridge information matching the target network mode includes: Send a packet forwarding control protocol PFCP session establishment request carrying the network mode identifier of the network mode of the DN node to the UPF node; Receive a PFCP session establishment response sent by the UPF node carrying the bridge information.

[0104] In a possible implementation manner, the bridge information further includes: The DS-TT port number, NW-TT port number of the network-side time-sensitive network converter, and TSN bridge identifier allocated by the UPF node; The construction of the TSN bridge based on the bridge information includes: Sending the DS-TT port number to the terminal device.

[0105] Based on the same concept, the present application also provides a bridge construction and discovery method, which is applied to a terminal device. Refer to Figure 7 The flowchart of a bridge construction and discovery method provided by the present application is shown, including the following steps: S701. Send a PDU session establishment request to the SMF node. Among them, the PDU session establishment request carries first indication information, and the first indication information is used to indicate the target network mode of the time-sensitive network (TSN) bridge to be built corresponding to the terminal device. In different network modes, the protocol stack composition of the user plane function (UPF) node is different; S702. Receive the DS-TT port number sent by the SMF node.

[0106] Based on the same concept, the present application also provides a bridge construction and discovery method, which is applied to a PCF node. Refer to Figure 8 The flowchart of a bridge construction and discovery method provided by the present application is shown, including the following steps: S801. Receive a session policy creation request sent by the SMF node; among them, the session policy creation request carries a target network mode identifier of the target network mode of the UPF node. The UPF node is pre-configured with multiple network modes, and in different network modes, the protocol stack composition of the UPF node is different; S802. Send a policy control request trigger condition to the SMF node. The policy creation request trigger condition includes a target trigger condition for instructing the SMF node to report the bridge information in the target network mode to the PCF node; S803. Receive the target bridge information sent by the SMF node after the target trigger condition is triggered, and perform TSN bridge discovery based on the target bridge information; among them, the target bridge information includes the bridge information allocated by the UPF node and the MAC address of DS-TT sent by the terminal device to the SMF node.

[0107] In a possible implementation manner, the TSN bridge discovery based on the target bridge information includes: Reporting the target bridge information and the target network mode identifier corresponding to the target bridge information to the TSN-AF node; Create an AF session related to the TSN bridge in the target network mode, and subscribe to TSN events on the AF session; Determine the transmission delay information of the TSN bridge in the target network mode, and report the transmission delay information to the TSN-AF node.

[0108] Based on the same concept, the present application also provides a method for bridge construction and discovery, which is applied to a UPF node. The UPF node is pre-configured with multiple network modes, and the protocol stack of the UPF node is different under different network modes. Refer to Figure 9 The flowchart of a method for bridge construction and discovery provided by the present application is shown, including the following steps: S901. Receive a Packet Forwarding Control Protocol (PFCP) session establishment request sent by an SMF node, which carries a network mode identifier of the DN node's network mode; S902. Determine the target network mode of the UPF node corresponding to the network mode of the DN node; S903. Determine the bridge information in the target network mode, and send the bridge information to the SMF node.

[0109] For a detailed description of the above steps, refer to the above embodiments and will not be elaborated here.

[0110] Corresponding to the embodiments of the above-mentioned method for bridge construction and discovery, the present application also provides embodiments of a device for bridge construction and discovery.

[0111] Refer to Figure 10 As shown, it is a schematic diagram of a device for bridge construction and discovery provided by the application. The device is applied to an SMF node and specifically includes: A first receiving module 1001, configured to receive a PDU session establishment request sent by a terminal device, where the PDU session establishment request carries first indication information for indicating the modal type of the TSN bridge to be built; the protocol stack of the UPF node is different under different network modes; A processing module 1002, configured to obtain bridge information matching the target network mode under the modal type, and perform construction and discovery of the TSN bridge based on the bridge information; where the bridge information includes an identifier of a UPF instance carrying the target network mode, and different UPF instances are used to carry TSN bridges under different network modes.

[0112] Optionally, the SMF node includes first network mode information of the pre-configured UPF node in each network mode, and second network mode information of the data network DN node in each network mode; The processing module 1002 is further configured to determine the target network mode according to the following method: When the address of the DN node is carried in the PDU session establishment request, based on the address of the DN node, determine the network mode of the DN node, and based on the network mode of the DN node and the correspondence between the first network mode information and the second network mode information, determine the target network mode; When the address of the DN node is not carried in the PDU session establishment request, based on the pre-configured second network mode information, the mode type, and the service type of the terminal device, determine the network mode of the DN node, and based on the network mode of the DN node and the correspondence, determine the target network mode.

[0113] Optionally, the network mode information includes a network mode identifier; After determining the target network mode, the processing module 1002 is further configured to: Send a session policy creation request carrying the target network mode identifier of the target network mode to the Policy Control Function (PCF) node; Receive the policy control request trigger condition sent by the PCF node, where the policy control request trigger condition includes a target trigger condition for instructing the SMF node to report the bridge information in the target network mode to the PCF node.

[0114] Optionally, the PDU session establishment request further carries the Media Access Control (MAC) address of the DS-TT deployed by the terminal device; The processing module 1002, when discovering the TSN bridge based on the bridge information, is configured to: After obtaining the bridge information matching the target network mode, in response to the triggering of the target trigger condition, send the bridge information and the MAC address of the DS-TT to the PCF node, so as to instruct the PCF to report the bridge information and the MAC address of the DS-TT to the TSN Application Function (AF) network element.

[0115] Optionally, the processing module 1002, when obtaining the bridge information matching the target network mode, is configured to: Send a Packet Forwarding Control Protocol (PFCP) session establishment request carrying the network mode identifier of the network mode of the DN node to the UPF node; Receive the PFCP session establishment response sent by the UPF node carrying the bridge information.

[0116] Optionally, the bridge information further includes: The DS-TT port number of the time-sensitive network converter on the terminal side, the NW-TT port number of the time-sensitive network converter on the network side, and the TSN bridge identifier allocated by the UPF node; When constructing the TSN bridge based on the bridge information, the processing module 1002 is configured to: Send the DS-TT port number to the terminal device.

[0117] Based on the same concept, the present application further provides a bridge construction and discovery device, which is applied to a terminal device. Refer to Figure 11 As shown, it is a schematic diagram of a bridge construction and discovery device provided by the present application, including: The first sending module 1101 is configured to send a PDU session establishment request to the SMF node, where the PDU session establishment request carries first indication information, and the first indication information is used to indicate the target network mode of the time-sensitive network (TSN) bridge to be built corresponding to the terminal device. Under different network modes, the protocol stack composition of the user plane function (UPF) node is different; The second receiving module 1102 is configured to receive the DS-TT port number sent by the SMF node.

[0118] Based on the same concept, the present application further provides a bridge construction and discovery device, which is applied to a PCF node. Refer to Figure 12 As shown, it is a schematic diagram of a bridge construction and discovery device provided by the present application, including: The third receiving module 1201 is configured to receive a session policy creation request sent by the SMF node; the session policy creation request carries a target network mode identifier of the target network mode of the UPF node. The UPF node is pre-configured with multiple network modes, and under different network modes, the protocol stack composition of the UPF node is different; The second sending module 1202 is configured to send a policy control request trigger condition to the SMF node. The policy creation request trigger condition includes a target trigger condition for instructing the SMF node to report the bridge information in the target network mode to the PCF node; The fourth receiving module 1203 is configured to receive the target bridge information sent by the SMF node after the target trigger condition is triggered, and discover the TSN bridge based on the target bridge information; the target bridge information includes the bridge information allocated by the UPF node and the MAC address of the DS-TT sent by the terminal device to the SMF node.

[0119] Optionally, the fourth receiving module 1203 is specifically configured to: Report the target bridge information and the target network mode identifier corresponding to the target bridge information to the TSN-AF node; Create an AF session related to the TSN bridge in the target network mode, and subscribe to TSN events on the AF session; Determine the transmission delay information of the TSN bridge in the target network mode, and report the transmission delay information to the TSN-AF node.

[0120] Based on the same concept, the present application also provides a bridge construction and discovery device, which is applied to a UPF node. The UPF node is pre-configured with multiple network modes, and the protocol stack composition of the UPF node is different under different network modes. Refer to Figure 13 As shown, it is a schematic diagram of a bridge construction and discovery device provided by the present application, including: A fifth receiving module 1301, configured to receive a packet forwarding control protocol PFCP session establishment request carrying a network mode identifier of the DN node sent by the SMF node; A determination module 1302, configured to determine the target network mode of the UPF node corresponding to the network mode of the DN node; A third sending module 1303, configured to determine bridge information in the target network mode, and send the bridge information to the SMF node.

[0121] The implementation processes of the functions and effects of each unit in the above device are specifically described in the implementation processes of the corresponding steps in the above method, and will not be elaborated here.

[0122] For the device embodiment, since it basically corresponds to the method embodiment, the relevant parts can refer to the partial description of the method embodiment. The device embodiments described above are only illustrative. The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of the present application. Those of ordinary skill in the art can understand and implement without creative efforts.

[0123] The present application also provides a computer-readable storage medium, which stores a computer program, and the computer program can be used to execute the bridge construction and discovery method described in the above embodiments.

[0124] The present application also provides a computer device. Refer to Figure 14As shown in the figure, it is a schematic structural diagram of a computer device provided by this application. At the hardware level, the electronic device includes a processor, an internal bus, a network interface, a memory, and a non-volatile memory. Of course, it may also include other hardware required for other services. The processor reads the corresponding computer program from the non-volatile memory into the memory and then runs it to implement the bridge building and discovery methods described in the above embodiments. Of course, in addition to the software implementation method, this specification does not exclude other implementation methods, such as logic devices or a combination of software and hardware, etc. That is to say, the execution subject of the following processing flow is not limited to each logic unit, and can also be hardware or logic devices.

[0125] Embodiments of the subject matter and functional operations described in this specification can be implemented in the following: digital electronic circuits, tangibly embodied computer software or firmware, computer hardware including the structures disclosed in this specification and their structural equivalents, or a combination of one or more of them. Embodiments of the subject matter described in this specification can be implemented as one or more computer programs, that is, one or more modules in computer program instructions encoded on a tangible non-transitory program carrier to be executed by a data processing device or to control the operation of a data processing device. Alternatively or additionally, the program instructions can be encoded on an artificially generated propagated signal, such as a machine-generated electrical, optical, or electromagnetic signal, which is generated to encode and transmit information to a suitable receiver device for execution by a data processing device. A computer storage medium can be a machine-readable storage device, a machine-readable storage substrate, a random or serial access memory device, or a combination of one or more of them.

[0126] The processing and logic flows described in this specification can be executed by one or more programmable computers executing one or more computer programs to perform corresponding functions by operating on input data and generating outputs. The processing and logic flows can also be executed by dedicated logic circuits - such as FPGAs (Field Programmable Gate Arrays) or ASICs (Application Specific Integrated Circuits), and the device can also be implemented as a dedicated logic circuit.

[0127] Computers suitable for executing computer programs include, for example, general and / or special purpose microprocessors, or any other type of central processing unit. Generally, the central processing unit will receive instructions and data from read-only memory and / or random access memory. The basic components of a computer include a central processing unit for implementing or executing instructions and one or more memory devices for storing the instructions and data. Generally, a computer will also include one or more mass storage devices for storing data, such as magnetic disks, magneto-optical disks, or optical disks, etc., or the computer will be operatively coupled to such mass storage devices to receive data therefrom or transfer data thereto, or both. However, a computer is not necessarily required to have such devices. In addition, a computer may be embedded in another device, such as a mobile phone, a personal digital assistant (PDA), a mobile audio or video player, a game console, a global positioning system (GPS) receiver, or a portable storage device such as a universal serial bus (USB) flash drive, to name just a few.

[0128] Computer-readable media suitable for storing computer program instructions and data include all forms of non-volatile memory, media, and memory devices, such as including semiconductor memory devices (e.g., EPROM, EEPROM, and flash memory devices), magnetic disks (e.g., internal hard disks or removable disks), magneto-optical disks, and CD ROM and DVD-ROM disks. The processor and the memory may be supplemented by, or incorporated in, special purpose logic circuitry.

[0129] Although this specification contains many specific implementation details, these should not be construed as limiting the scope of any invention or the scope of what is claimed, but rather as mainly describing the features of specific embodiments of a particular invention. Certain features that are described in multiple embodiments in this specification may also be implemented in combination in a single embodiment. On the other hand, the various features described in a single embodiment may also be implemented separately in multiple embodiments or in any suitable sub-combination. In addition, although features may operate in certain combinations as described above and even be claimed as such initially, one or more features from a claimed combination may in some cases be removed from the combination, and the claimed combination may be directed to a sub-combination or a variation of a sub-combination.

[0130] Similarly, although operations are depicted in the drawings in a particular order, this should not be construed as requiring that the operations be performed in the particular order shown or sequentially, or that all illustrated operations be performed, to achieve a desired result. In some cases, multitasking and parallel processing may be advantageous. In addition, the separation of various system modules and components in the above embodiments should not be construed as requiring such separation in all embodiments, and it should be understood that the described program components and systems may generally be integrated together in a single software product or packaged into multiple software products.

[0131] Thus, specific embodiments of the subject matter have been described. Other embodiments are within the scope of the appended claims. In some cases, the acts recited in the claims can be performed in a different order and still achieve the desired result. In addition, the processes depicted in the figures are not necessarily in the particular order or sequential order shown to achieve the desired result. In some implementations, multitasking and parallel processing may be advantageous.

[0132] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included within the scope of protection of the present application.

Claims

1. A method for bridge construction and discovery, characterized in that, The method is applied to a Session Management Function (SMF) node, and the method includes: Receiving a Packet Data Unit (PDU) session establishment request sent by a terminal device, where the PDU session establishment request carries first indication information for indicating the modal type of a Time-Sensitive Networking (TSN) bridge to be established; under different network modes, the protocol stack composition of a User Plane Function (UPF) node is different; Obtaining bridge information matching the target network mode under the modal type, and constructing and discovering the TSN bridge based on the bridge information; where the bridge information includes the identifier of a UPF instance carrying the target network mode, and different UPF instances are used to carry TSN bridges under different network modes.

2. The method according to claim 1, characterized in that The SMF node includes pre-configured first network mode information of the UPF node under each network mode, and second network mode information of a Data Network (DN) node under each network mode; The method further includes determining the target network mode according to the following method: When the address of the DN node is carried in the PDU session establishment request, determining the network mode of the DN node based on the address of the DN node, and determining the target network mode based on the network mode of the DN node and the correspondence between the first network mode information and the second network mode information; When the address of the DN node is not carried in the PDU session establishment request, determining the network mode of the DN node based on the pre-configured second network mode information, the modal type, and the service type of the terminal device, and determining the target network mode based on the network mode of the DN node and the correspondence; 3. The method according to claim 2, wherein The network mode information includes a network mode identifier; After determining the target network mode, the method further includes: Sending a session policy creation request carrying the target network mode identifier of the target network mode to a Policy Control Function (PCF) node; Receiving a policy control request trigger condition sent by the PCF node, where the policy control request trigger condition includes a target trigger condition for instructing the SMF node to report the bridge information under the target network mode to the PCF node; The PDU session establishment request also carries the Media Access Control (MAC) address of a Deterministic and Synchronous Ethernet (DS-TT) deployed by the terminal device; Discovering the TSN bridge based on the bridge information includes: After obtaining the bridge information matching the target network mode, in response to the target trigger condition being triggered, sending the bridge information and the MAC address of the DS-TT to the PCF node to instruct the PCF to report the bridge information and the MAC address of the DS-TT to a TSN Application Function (AF) network element.

4. The method according to claim 2, characterized in that The obtaining the bridge information matching the target network mode includes: Sending a Packet Forwarding Control Protocol (PFCP) session establishment request carrying the network mode identifier of the DN node to the UPF node; Receiving a PFCP session establishment response sent by the UPF node and carrying the bridge information.

5. The method according to claim 4, characterized in that The bridge information further includes: The DS-TT port number of the time-sensitive network converter on the terminal side, the NW-TT port number of the time-sensitive network converter on the network side, and the TSN bridge identifier allocated by the UPF node; The construction of the TSN bridge based on the bridge information includes: Sending the DS-TT port number to the terminal device.

6. A method for bridge construction and discovery, characterized in that, The method is applied to a terminal device, and the method includes: Sending a PDU session establishment request to the SMF node, where the PDU session establishment request carries first indication information for indicating a target network mode of a time-sensitive network (TSN) bridge to be built corresponding to the terminal device. Under different network modes, the protocol stack composition of the user plane function (UPF) node is different; Receiving the DS-TT port number sent by the SMF node.

7. A method for bridge construction and discovery, characterized in that, The method is applied to a PCF node, and the method includes: Receiving a session policy creation request sent by the SMF node; where the session policy creation request carries a target network mode identifier of the target network mode of the UPF node. The UPF node is pre-configured with multiple network modes, and under different network modes, the protocol stack composition of the UPF node is different; Sending a policy control request trigger condition to the SMF node. The policy creation request trigger condition includes a target trigger condition for instructing the SMF node to report the bridge information in the target network mode to the PCF node; Receiving the target bridge information sent by the SMF node after the target trigger condition is triggered, and discovering the TSN bridge based on the target bridge information; where the target bridge information includes the bridge information allocated by the UPF node and the MAC address of DS-TT sent by the terminal device to the SMF node.

8. The method according to claim 7, wherein The discovery of the TSN bridge based on the target bridge information includes: Reporting the target bridge information and the target network mode identifier corresponding to the target bridge information to the TSN-AF node; Creating an AF session related to the TSN bridge in the target network mode, and subscribing to TSN events on the AF session; Determining the transmission delay information of the TSN bridge in the target network mode, and reporting the transmission delay information to the TSN-AF node.

9. A method for bridge construction and discovery, characterized in that, The method is applied to a UPF node. The UPF node is pre-configured with multiple network modes, and under different network modes, the protocol stack composition of the UPF node is different. The method includes: Receiving a packet forwarding control protocol (PFCP) session establishment request sent by the SMF node carrying a network mode identifier of the DN node; Determining the target network mode of the UPF node corresponding to the network mode of the DN node; Determining the bridge information in the target network mode, and sending the bridge information to the SMF node.

10. A bridge building and discovery device, characterized in that The device is applied to an SMF node, and the device includes: A first receiving module, configured to receive a PDU session establishment request sent by a terminal device, where the PDU session establishment request carries first indication information for indicating a modal type of a TSN bridge to be established; under different network modes, the protocol stack of a UPF node is different; A processing module, configured to obtain bridge information matching a target network mode of the modal type, and construct and discover a TSN bridge based on the bridge information; where the bridge information includes an identifier of a UPF instance carrying the target network mode, and different UPF instances are used to carry TSN bridges under different network modes.

11. A bridge building and discovery device, characterized in that, The apparatus is applied to a terminal device, and the apparatus includes: A first sending module, configured to send a PDU session establishment request to an SMF node, where the PDU session establishment request carries first indication information for indicating a target network mode of a time-sensitive network (TSN) bridge to be established corresponding to the terminal device; under different network modes, the protocol stack of a user plane function (UPF) node is different; A second receiving module, configured to receive a DS-TT port number sent by the SMF node.

12. A bridge building and discovery device, characterized in that, The apparatus is applied to a PCF node, and the apparatus includes: A third receiving module, configured to receive a session policy creation request sent by an SMF node; where the session policy creation request carries a target network mode identifier of a target network mode of a UPF node, and the UPF node is pre-configured with multiple network modes, and under different network modes, the protocol stack of the UPF node is different; A second sending module, configured to send a policy control request trigger condition to the SMF node, where the policy creation request trigger condition includes a target trigger condition for instructing the SMF node to report bridge information of the target network mode to the PCF node; A fourth receiving module, configured to receive target bridge information sent by the SMF node after the target trigger condition is triggered, and discover a TSN bridge based on the target bridge information; where the target bridge information includes bridge information allocated by the UPF node and a MAC address of DS-TT sent by the terminal device to the SMF node.

13. A bridge building and discovery device, characterized in that, The apparatus is applied to a UPF node, and the UPF node is pre-configured with multiple network modes, and under different network modes, the protocol stack of the UPF node is different. The apparatus includes: A fifth receiving module, configured to receive a packet forwarding control protocol (PFCP) session establishment request sent by an SMF node, where the PFCP session establishment request carries a network mode identifier of a DN node; A determining module, configured to determine a target network mode of the UPF node corresponding to the network mode of the DN node; A third sending module, configured to determine bridge information of the target network mode, and send the bridge information to the SMF node.

14. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the program is executed by a processor, the steps of the method according to any one of claims 1 to 9 are implemented.

15. A computer device, comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, characterized in that, The processor executes the steps of the method according to any one of claims 1 to 9.

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