CN116193626A

CN116193626A - Data transmission control method, device and storage medium

Info

Publication number: CN116193626A
Application number: CN202111422057.7A
Authority: CN
Inventors: 韩波; 詹亚军; 杜相文
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2021-11-26
Filing date: 2021-11-26
Publication date: 2023-05-30
Also published as: WO2023093368A1

Abstract

The embodiment of the application provides a data transmission control method, equipment and a storage medium. The data transmission control method applied to the CNC equipment comprises the following steps: acquiring GTPU tunnel information of a TSN session; generating end node scheduling policy information according to the GTPU tunnel information, the characteristic information of the TSN service flow and the state information of the bearing network; and sending the end node scheduling policy information to an end node of the bearing network, so that the end node can package the TSN service flow according to the first mapping relation table to form a service packet with an outer layer flow identifier, and sending the service packet according to the sending scheduling list. According to the embodiment of the application, the TSN service flow is encapsulated in the TSN bearing network by utilizing the mapping relation between the inner layer flow identification and the outer layer flow identification, the service packet with the outer layer flow identification is formed, and the deterministic scheduling strategy information based on the outer layer flow identification is issued to each node of the TSN bearing network, so that the deterministic transmission of the corresponding TSN service flow in the bearing network is effectively ensured.

Description

Data transmission control method, device and storage medium

Technical Field

The embodiment of the application relates to the technical field of communication, in particular to a data transmission control method, data transmission control equipment and a storage medium.

Background

TSN (Time Sensitive Network ) is a set of data link layer protocol specifications developed by the IEEE802.1 task group, with the aim of building a more reliable, low latency, low jitter ethernet. The TSN can provide microsecond deterministic service, and real-time requirements of various industries are guaranteed.

As shown in fig. 1, in the TSN network of the related art, traffic flow characteristics (burst time, period, identification, delay requirement, etc.) of an end station are registered in a CUC (Centralized User Configuration, centralized user controller). The CUC transmits the end station characteristics to CNC (Centralized Network Configuration, centralized network controller) equipment, and the CNC equipment transmits scheduling information based on service flow identification through a NetConf interface according to the forwarding capacity and resource reservation condition of each TSN switch/bridge controlled by the CNC equipment, so that each service flow passes through each node without conflict, and the certainty of time delay is ensured.

The dependence on the wireless access of a new generation mobile communication system (such as 5G) and the deterministic time delay provided by TSN is an important foundation for realizing industrial Internet wireless and flexible manufacturing in the future. After introduction of the mobile communication system, the TSN integrates the mobile communication system as a bridge in the TSN system. However, the CNC device cannot sense the outer layer characteristics of the transmission path in the mobile communication system, so that the scheduling parameter based on the outer layer parameter cannot be issued, and the deterministic forwarding of the message in the mobile communication system cannot be ensured, and packet loss is easy to occur.

Disclosure of Invention

The following is a summary of the subject matter described in detail herein. This summary is not intended to limit the scope of the claims.

The embodiment of the application provides a data transmission control method, a data transmission control device, electronic equipment and a storage medium, which can describe the channel condition of scene more precisely and accurately.

In a first aspect, an embodiment of the present application provides a data transmission control method applied to a CNC device, where the CNC device is communicatively connected to an end node of a bearer network, the method including:

acquiring GTPU tunnel information of a TSN session; the GTPU tunnel information comprises an inner layer flow identifier of a TSN service flow;

generating end node scheduling policy information according to the GTPU tunnel information, the characteristic information of TSN service flow and the state information of the bearing network; the end node scheduling policy information comprises a first mapping relation table and a sending scheduling list, wherein the first mapping relation table comprises the mapping relation between the inner layer flow identification and the outer layer flow identification;

and sending the end node scheduling policy information to an end node of the bearing network, so that the end node can package TSN service flows according to the first mapping relation table to form service packets with outer layer flow identifiers, and sending the service packets according to a sending scheduling list.

In a second aspect, an embodiment of the present application provides a data transmission control method, applied to an end node in a bearer network, where the method includes:

receiving a TSN service flow;

receiving end node scheduling policy information from a CNC device; the end node scheduling policy information comprises a first mapping relation table and a sending scheduling list, wherein the first mapping relation table comprises a mapping relation between an inner layer flow identifier and an outer layer flow identifier;

encapsulating the TSN service flow according to the first mapping relation table to form a service packet with an outer layer flow identifier;

and transmitting the service packet according to the transmission scheduling list.

In a third aspect, an embodiment of the present application provides a data transmission control method, applied to an intermediate node in a bearer network, where the method includes:

receiving a service packet, wherein the service packet is formed by packaging TSN service flows and provided with an outer layer flow mark;

receiving intermediate node scheduling policy information from a CNC device; the intermediate node scheduling policy information comprises a sending scheduling list;

In a fourth aspect, embodiments of the present application provide a CNC device comprising: the first memory, the first processor, and a computer program stored in the first memory and executable on the first processor, wherein the first processor implements the data transmission control method according to the first aspect when executing the computer program.

In a fifth aspect, embodiments of the present application provide a bearer network end node device, including: the second memory, the second processor and the computer program stored in the second memory and capable of running on the second processor, wherein the second processor implements the data transmission control method according to the second aspect when executing the computer program.

In a sixth aspect, an embodiment of the present application provides a bearer network intermediate node device, including: a third memory, a third processor and a computer program stored in the third memory and executable on the third processor, wherein the third processor implements the data transmission control method according to the third aspect when executing the computer program.

In a seventh aspect, embodiments of the present application provide a data transmission system, including:

the CNC device of the fourth aspect;

a first TSN end station, which is used for sending or receiving TSN service flow;

a first bearer network end node device in communication with the first TSN end station, the first bearer network end node device being a bearer network end node device according to the fifth aspect;

at least one bearer network intermediate node device according to the sixth aspect, said bearer network intermediate node device being communicatively connected to said first bearer network end node device;

A second bearer network end node device in communication with the bearer network intermediate node device, the second bearer network end node device being a bearer network end node device according to the fifth aspect;

and the second TSN end station is in communication connection with the second bearing network end node equipment and is used for sending or receiving TSN service flows.

In an eighth aspect, embodiments of the present application provide a computer-readable storage medium storing computer-executable instructions for:

the data transmission control method of the first aspect or the second aspect or the third aspect is performed.

An embodiment of the present invention provides a data transmission control method, applied to a CNC device, where the CNC device is communicatively connected to an end node of a bearer network, the method including: acquiring GTPU tunnel information of a TSN session; the GTPU tunnel information comprises an inner layer flow identifier of a TSN service flow; generating end node scheduling policy information according to the GTPU tunnel information, the characteristic information of TSN service flow and the state information of the bearing network; the end node scheduling policy information comprises a first mapping relation table and a sending scheduling list, wherein the first mapping relation table comprises the mapping relation between the inner layer flow identification and the outer layer flow identification; and sending the end node scheduling policy information to an end node of the bearing network, so that the end node can package TSN service flows according to the first mapping relation table to form service packets with outer layer flow identifiers, and sending the service packets according to a sending scheduling list. According to the embodiment of the application, the TSN service flow is encapsulated in the TSN bearing network by utilizing the mapping relation between the inner layer flow identification and the outer layer flow identification, the service packet with the outer layer flow identification is formed, and the deterministic scheduling strategy information based on the outer layer flow identification is issued to each node of the TSN bearing network, so that the deterministic transmission of the corresponding TSN service flow in the bearing network is effectively ensured.

It is to be appreciated that the advantages of the second to eighth aspects compared to the related art are the same as those of the first aspect compared to the related art, and reference may be made to the related description in the first aspect, which is not repeated herein.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required for the embodiments or the description of the related art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort to a person having ordinary skill in the art.

Fig. 1 is a schematic diagram of a network architecture of a related art TSN network;

fig. 2 is a network architecture diagram of a related art TSN network;

fig. 3 is a schematic diagram of a system architecture for performing a data transmission control method according to an embodiment of the present application;

fig. 4 is a schematic diagram of a system architecture for performing a data transmission control method according to another embodiment of the present application;

fig. 5 is a flow chart of a data transmission control method according to an embodiment of the present application;

FIG. 6 is a schematic diagram illustrating signal processing corresponding to a system architecture according to another embodiment of the present application;

fig. 7 is a flowchart of a data transmission control method according to another embodiment of the present application;

fig. 8 is a flowchart of a data transmission control method according to another embodiment of the present application;

fig. 9 is a flowchart of a data transmission control method according to another embodiment of the present application;

fig. 10 is a flowchart of a data transmission control method according to another embodiment of the present application;

fig. 11 is a flowchart of a data transmission control method according to another embodiment of the present application;

fig. 12 is a flowchart of a data transmission control method according to another embodiment of the present application;

fig. 13 is a flowchart of a data transmission control method according to another embodiment of the present application;

fig. 14 is a flowchart of a data transmission control method according to another embodiment of the present application;

FIG. 15 is a signal flow diagram of one embodiment of the present application;

fig. 16 is a schematic diagram of a system architecture for performing a data transmission control method according to another embodiment of the present application.

Detailed Description

In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system configurations, techniques, etc. in order to provide a thorough understanding of the embodiments of the present application. However, it will be apparent to one skilled in the art that the embodiments of the present application may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the embodiments of the present application with unnecessary detail.

It should be noted that although a logical order is illustrated in the flowchart, in some cases, the steps illustrated or described may be performed in an order different from that in the flowchart. The terms first, second and the like in the description and in the claims and in the above-described figures, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.

It should also be appreciated that references to "one embodiment" or "some embodiments" or the like described in the specification of embodiments of the present application mean that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the present application. Thus, appearances of the phrases "in one embodiment," "in some embodiments," "in other embodiments," and the like in the specification are not necessarily all referring to the same embodiment, but mean "one or more but not all embodiments" unless expressly specified otherwise. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless expressly specified otherwise.

The new generation mobile communication system (such as 5G network system) has wide application scene on the industrial Internet due to the characteristics of large bandwidth, high reliability and low time delay, and can meet the flexible mobility of industrial Internet equipment and flexible production of a power assisting factory; the system also has differentiated network customization capability and can meet various business requirements. The new generation mobile communication system has a wide application field, but also faces unprecedented challenges. For example, scenes such as industrial control, automatic driving and the like have strict requirements on time delay, jitter and packet loss of a network; this deterministic transmission requirement is difficult to achieve in current mobile networks because conventional networks employ best effort forwarding models, and it is difficult to guarantee delay and jitter in the worst case.

TSN (Time Sensitive Network ) is a set of data link layer protocol specifications developed by the IEEE802.1 task group, with the aim of building a more reliable, low latency, low jitter ethernet. The TSN can provide microsecond deterministic service, and real-time requirements of various industries are guaranteed. The 5G TSN technology, for example, can meet various indexes of deterministic communication in wireless network transmission, and is an important foundation for realizing industrial Internet wireless and flexible manufacturing in the future.

As shown in fig. 1, in the TSN network of the related art, traffic flow characteristics (burst time, period, identification, delay requirement, etc.) of an end station are registered in a CUC (Centralized User Configuration, centralized user controller) device. The CUC equipment transmits the end station characteristics to CNC (Centralized Network Configuration, centralized network controller) equipment, and the CNC equipment transmits scheduling information based on service flow identification through a NetConf interface according to the forwarding capacity and resource reservation condition of each TSN switch/bridge controlled by the CNC equipment, so that each service flow passes through each node without conflict, and the certainty of time delay is ensured.

The wireless access and the deterministic time delay provided by the TSN of a new generation mobile communication system (such as a 5G network system) are important bases for realizing industrial Internet wireless and flexible manufacturing in the future. After introduction of the mobile communication system, the TSN integrates the mobile communication system as a bridge in the TSN system. However, the CNC device cannot sense the outer layer characteristics of the transmission path in the mobile communication system, so that the scheduling parameter based on the outer layer parameter cannot be issued, and the deterministic forwarding of the message in the mobile communication system cannot be ensured, and packet loss is easy to occur.

For example, referring to fig. 2, in some application scenarios, after a 5G network system (5 GS) is introduced, the TSN integrates the 5G network system as a bridge (hereinafter referred to as a 5G bridge, also referred to as a TSN 5GS virtual bridge) in the TSN system, and the TSN network and the 5G network system communicate with each other through a TSN converter. The TSN converter includes a DS-TT (Device Side TSN Translator, device side TSN converter) and an NW-TT (Network Side TSN Translator, network side TSN converter). The DS-TT is positioned at the terminal side and connected with the TSN wireless access terminal UE; the NW-TT is located on the network side and connected with the UPF. The first TSN end station establishes a TSN service flow communication connection with the second TSN end station sequentially through a DS-TT, a UE (User Equipment), a RAN (Radio Access Network ), a UPF (User Plane Function, user plane function), and an NW-TT. TSN traffic may enter the 5G bridge from either the DS-TT or NW-TT. The whole 5G network system comprises a TSN wireless access terminal, an access network RAN, an intermediate bearing node and a core network, wherein the core network comprises an AF (Application, function, application function), a PCF (Policy Control Function ), an SMF (Session Management Function, session management function), an AMF (Access and Mobility Management Function ) and a UPF, and the core network (comprising 3GPP protocols 23501, 23502, 38413, 29244, 24519, 29513) issues deterministic scheduling parameters in the RAN, DS-TT and NW-TT for realizing forwarding certainty of traffic passing through a 5G network bridge as much as possible. However, the CNC device cannot sense the outer layer characteristics of the RAN-UPF transmission path (i.e., the TSN traffic flow characteristics and forwarding requirements after GTPU encapsulation are not known), so that the scheduling parameters based on the outer layer parameters cannot be issued, and deterministic forwarding of the packet between the carrier networks (RAN-UPF) cannot be guaranteed. Packet loss occurs when the jitter of the messages between the RAN and the UPF exceeds the redundancy value of the scheduling policy at both ends of the bridge.

Based on this, the embodiment of the application provides a data transmission control method, a device and a storage medium. The solution idea of the embodiment of the application is as follows: reporting network layer mapping supporting capability through an end node of the bearing network, so that CNC equipment perceives that network layer mapping strategy and routing strategy can be issued to the end node of the bearing network; issuing a network layer mapping strategy to an end node of a bearing network through CNC equipment, and mapping TSN service flows into network layer identifiers, so that the bearing network equipment can distinguish TSN service flows of an inner layer according to the network layer identifiers of an outer layer of a message; subscribing the GTPU (GPRS Tunneling Protocol Unit, GPRS tunnel protocol unit) tunnel information used by the DS-TT port to an end node of the bearing network through CNC equipment, so that the end node of the bearing network reports the GTPU tunnel information to the CNC equipment after the tunnel is established; reporting GTPU tunnel information used by a current DS-TT port through an end node of a bearing network, so that CNC equipment can decide a forwarding path which is decided for the tunnel and supports deterministic scheduling; issuing the end node scheduling strategy information decided in the previous step to the end node of the bearing network through CNC equipment, so that a service packet sent by the end node of the bearing network is led to be guided to the bearing network which supports TSN and is selected for the service; and transmitting a deterministic scheduling strategy based on the network layer identification to each intermediate node of the bearing network to ensure the deterministic transmission of the responding TSN service flow in the 5G network bridge. According to the embodiment of the application, the TSN service flow is encapsulated in the TSN bearing network by utilizing the mapping relation between the inner layer flow identification and the outer layer flow identification, the service packet with the outer layer flow identification is formed, and the deterministic scheduling strategy information based on the outer layer flow identification is issued to each node of the TSN bearing network, so that the deterministic transmission of the corresponding TSN service flow in the bearing network is effectively ensured.

Referring to fig. 3, fig. 3 is a schematic diagram of a system architecture for performing a data transmission control method according to an embodiment of the present application. In the example of fig. 3, the system architecture includes a CNC device, a first TSN end station, a carrier network, and a second TSN end station. The first TSN end station, the bearing network and the second TSN end station are connected in sequence, and the CNC equipment is used for controlling the bearing network to forward the TSN service flow according to the characteristic information of the TSN service flow and the state information of the bearing network. The bearer network comprises a first bearer network end node device, at least one bearer network intermediate node device and a second bearer network end node device. For example, the bearer network may be a mobile communication system including a TSN radio access terminal UE, an access network RAN, an intermediate bearer node, and a core network including AF, PCF, SMF, AMF, UPF.

The CNC device is used for controlling the bearing network to forward the TSN service flow according to the characteristic information of the TSN service flow and the state information of the bearing network. In some embodiments, the system further includes one or more CUC devices, each connected to the first TSN end station and the second TSN end station, for obtaining TSN traffic flow transmission requirements from the first TSN end station or the second TSN end station, the CNC device receiving user periodic time-related requirements formulated from the CUC device, and calculating a TSN configuration to satisfy the requirements. In other embodiments, the CNC device is coupled to the first TSN end station and the second TSN end station, respectively, for obtaining TSN traffic flow transmission requirements from the first TSN end station or the second TSN end station.

And the first TSN end station is used for sending or receiving the TSN service stream.

The first bearer network end node device is communicatively coupled to the first TSN end station. The first bearer network end node device may be a RAN or a UPF.

At least one bearer network intermediate node device communicatively coupled to the first bearer network end node device, wherein the intermediate node device may be a TSN switch.

And the second bearing network end node equipment is in communication connection with the bearing network intermediate node equipment. The second bearer network end node device may be a RAN or a UPF.

The non-TSN traffic stream carrying network TN is connected between the first carrying network end node device and the second carrying network end node device and is used for transmitting the non-TSN traffic stream, and the transmission line is shown as a dotted line in FIG. 3.

Referring to fig. 3, in some embodiments, the first bearer network end node device is a RAN, the second bearer network end node device is a UPF, the system architecture further includes a DS-TT, a UE, an NW-TT, and a UPF, and the first TSN end station establishes a TSN traffic communication connection with the second TSN end station sequentially through the DS-TT, UE, RAN, an intermediate bearer node (e.g., a TSN switch), the UPF, and the NW-TT. CNC equipment is connected with UPF through AF, PCF, SMF in sequence; the CNC device is in turn communicatively connected to the RAN via AF, PCF, SMF, AMF.

Referring to fig. 4, in other embodiments, the first bearer network end node device is a first RAN, the second bearer network end node device is a second RAN, the system architecture further includes a first DS-TT, a second DS-TT, a first UE, and a second UE, and the first TSN end station establishes a TSN traffic communication connection with the second TSN end station sequentially through the DS-TT, the first UE, the first RAN, an intermediate bearer node (e.g., a TSN switch), the second RAN, the second UE, and the second DS-TT. The CNC device is in turn communicatively coupled to the first RAN and the second RAN, respectively, via AF, PCF, SMF, AMF.

The system architecture and the application scenario described in the embodiments of the present application are for more clearly describing the technical solution of the embodiments of the present application, and do not constitute a limitation on the technical solution provided by the embodiments of the present application, and those skilled in the art can know that, with the evolution of the system architecture and the appearance of a new application scenario, the technical solution provided by the embodiments of the present application is equally applicable to similar technical problems.

It will be appreciated by those skilled in the art that the hardware platform is not to be construed as limiting the embodiments of the application, and may include more or fewer components than shown, or may combine certain components, or may be arranged in different components.

In the above hardware platform, the CNC device, the first bearer network end node device, the bearer network intermediate node device, and the second bearer network end node device may respectively call the data transmission control programs stored therein to execute the data transmission control method.

Based on the system architecture, various embodiments of the data transmission control method in the present application are presented.

It should be noted that the embodiments of the present application may be applicable to a scenario where TSN traffic streaming needs to be performed on a package using an outer layer feature, for example, a scenario using a tsn_5gs virtual bridge, and particularly a RAN zoom-out scenario. The outer layer may be a transport layer, a network layer, a data link layer, etc., which is not limited in this application. That is, the outer layer identifier for distinguishing the outer layer TSN traffic is not limited to the field defined by the existing protocol, but a custom field may be used; more generally, it can be extended to the identification of all upper layer protocols that can carry TSN traffic. The inner layer flow identifier may be a flow identifier, such as QFI (QoS flow ID, qoS flow identifier), of the TSN traffic flow after passing through the RAN; alternatively, the inner layer flow identifier may be a flow identifier, such as QFI, of the TSN service flow after the TSN service flow passes through the UPF; the present application is not limited in this regard. In the following, the example will be described only in which the bearer network comprises a 5G bridge, the outer layer is a network layer, the inner layer flow is denoted QFI, and the outer layer flow is denoted FlowLabel.

An embodiment of the present application provides a data transmission control method applied to a CNC device, where the CNC device is communicatively connected to an end node of a bearer network, and referring to fig. 5, the method includes:

step S1100, obtaining GTPU tunnel information of TSN session; the GTPU tunnel information comprises an inner layer flow identifier of the TSN service flow;

step S1200, generating end node scheduling strategy information according to GTPU tunnel information, TSN service flow characteristic information and bearer network state information; the end node scheduling strategy information comprises a first mapping relation table and a sending scheduling list, wherein the first mapping relation table comprises a mapping relation between an inner layer flow identifier and an outer layer flow identifier;

step S1300, the end node scheduling strategy information is sent to the end node of the bearing network, so that the end node can package the TSN service flow according to the first mapping relation table, form the service package with the outer layer flow mark, and send the service package according to the sending scheduling list.

In some embodiments, the GTPU tunnel information includes an inner layer flow identifier of the TSN traffic flow, where the inner layer flow identifier of the TSN traffic flow may be a MAC address, a VLAN address, or a QFI of the TSN traffic flow, which is not limited in this application. When the inner layer flow mark of the TSN service flow is the MAC address or VLAN address of the TSN service flow, the MAC address or VLAN address can be extracted from the TSN service flow; when the inner layer flow identifier of the TSN service flow is the QFI identifier, the GTPU tunnel information may include a third mapping relationship table, where the third mapping relationship table includes a mapping relationship between the TSN service flow and the QFI identifier. That is, the subsequent CNC device may directly use the MAC address or VLAN address of the TSN service flow to establish a mapping with the outer layer flow identifier, or may use the QFI corresponding to the TSN service flow to establish a mapping with the outer layer flow identifier, which is not limited in this application.

In some embodiments, the GTPU tunnel information further includes GTPU base information, including endpoint information and tunnel identification information of the GTPU tunnel, and the like. The CNC equipment can know in which GTPU tunnel the corresponding TSN service flow is transmitted by acquiring the GTPU basic information and the TSN service flow information.

In some embodiments, the GTPU tunnel information for acquiring the TSN session may be acquired externally, e.g., from the RAN or UPF as the end node, with reference to fig. 6. TSN service flows sent from the first TSN end station (TSN Device1 and TSN Device 2) correspondingly reach RAN or UPF after passing through DS-TT or NW-TT at the MAC layer, and the RAN or UPF adds QFI marks to the TSN service flows according to tunnel information (comprising the mapping relation between the TSN service flows and inner layer flow marks).

In some embodiments, the end node is a RAN or UPF;

in step S1100, acquiring GTPU tunnel information of a TSN session includes:

step S1110, the GTPU tunnel information from the end node is acquired through the control plane signaling path.

In some embodiments, the state information of the bearer network includes delay information of each node of the bearer network, traffic scheduling time slot occupation information, and a second mapping relationship table, where the second mapping relationship table includes a mapping relationship between TSN traffic flows and outer layer flow identifiers;

The sending scheduling list comprises mapping relation of outer layer flow identification and internal TC (Traffic Class), service outflow port and gating time slot corresponding to the internal TC;

in step S1200, generating end node scheduling policy information according to the GTPU tunnel information, the characteristic information of the TSN service flow, and the status information of the bearer network, including:

step S1210, selecting a forwarding path meeting the preset requirement from the alternative paths according to the state information of the bearer network;

step S1220, an outer layer flow identifier is allocated for the TSN service flow;

step S1230, a first mapping relation table is generated according to the outer layer flow identification and the GTPU tunnel information;

step S1240, establishing the mapping relation between the outer layer flow identification and the internal TC;

step S1250, distributing the service outflow port and the gating time slot corresponding to the internal TC for the TSN service flow according to the characteristic information of the TSN service flow and the state information of the bearing network.

In some embodiments, the CNC device maintains a delay table of the TSN traffic flow reaching each node of the carrier network (i.e., delay information of each node of the carrier network), a traffic scheduling time slot occupancy table, and a FlowLabel allocation table corresponding to the TSN traffic flow.

The CNC device may obtain alternative paths in the 5G bridge that may be used for transmitting data, and by executing step S1210, select a path with a time delay/idle scheduling slot that meets the requirements from the alternative paths.

The CNC device allocates an IPv6 FlowLabel to the TSN traffic by executing step S1220, so that the GTPU outer layer srccip (source IP address) +dstid (destination IP address) +flowlabel can uniquely identify the current TSN traffic.

The CNC device generates a QFI- > FlowLabel correspondence (a first mapping relationship table) according to the recorded TSN traffic- > FlowLabel correspondence (the allocated outer layer flow identifier) and the TSN traffic- > QFI correspondence (GTPU tunnel information) reported by the UPF by executing step S1230. In other embodiments, when the inner layer flow identifier of the TSN service flow is a MAC address or a VLAN address, etc., the CNC device directly extracts the MAC address or the VLAN address of the TSN service flow, etc., or may directly generate the mapping relationship between the inner layer flow identifier and the outer layer flow identifier according to the mapping relationship between the MAC address or the VLAN address of the TSN service flow and the FlowLabel recorded by the CNC device.

The CNC equipment allocates an outer layer flow identifier for the inlet port of each node of the path where the current TSN service flow passes through in the GTPU tunnel by executing steps S1240 and S1250, and maps the outer layer flow identifier to an internal TC according to SrcIP+DstIP+FlowLabel, and allocates an outlet port and a gating time slot corresponding to the TC for the TSN service flow.

The CNC device sends the information package to the AF, which is sent to the RAN/UPF in the Set parameter operation of the 3GPP protocol 24519 (e.g., parameter IE uses 8001H).

Filling a flow label according to the QFI and the first mapping relation table when packaging the GTPU outer IPV6 head according to the issued corresponding relation (the first mapping relation table) of the QFI- > flow label by the UPF/RAN, and packaging to form a service package with the flow label; selecting a sending port of the service packet according to the issued output port; and controlling the packet sending time of the service packet according to the issuing gating list.

In some embodiments, the end node is a RAN or UPF;

the method for acquiring the GTPU tunnel information of the TSN session comprises the following steps:

step S1110, obtaining GTPU tunnel information from an end node through a control plane signaling path;

in step S1300, sending the end node scheduling policy information to the end node of the bearer network, including:

step S1310, the end node scheduling policy information is sent to the end node of the bearer network through the control plane signaling path.

In some embodiments, the control plane signaling path is a control plane signaling path of a core network and an access network in a 5G network system. Specifically, when the end node is RAN, in step S1110, the control plane signaling path is RAN-AMF-SMF-PCF-AF-CNC, GTPU tunnel information is transmitted to the CNC device through AF, and in step S1310, the control plane signaling path is CNC-AF-PCF-SMF-AMF-RAN, and the end node scheduling policy information is sent to the RAN through AMF; when the end node is a UPF, in step S1110, the control plane signaling path is a UPF-SMF-PCF-AF-CNC, GTPU tunnel information is transmitted to the CNC device through AF, and correspondingly, in step S1310, the control plane signaling path is a CNC-AF-PCF-SMF-UPF, and the end node scheduling policy information is sent to the UPF through the SMF.

Referring to fig. 7, in some embodiments, before acquiring GTPU tunnel information of the TSN session, further includes:

step S1400, receiving outer layer parameter mapping capability information from the end node;

step S1500, a GTPU subscription request is sent to an end node according to the outer layer parameter mapping capability information;

step S1600, receiving GTPU tunnel information from an end node.

In some embodiments, network layer mapping support capability (outer layer parameter mapping capability information) may be reported by the UPF/RAN as an end node so that the CNC device perceives that network layer mapping policies and routing policies may be issued to the UPF/RAN.

In some embodiments, the end node is a RAN;

receiving outer layer parameter mapping capability information from an end node, comprising:

step S1410, the outer layer parameter mapping capability information from the end node is received through the control plane signaling path.

In some embodiments, if the end node is a RAN accessed by the UE, supporting network layer parameter mapping, this capability is carried and reported to the AF along control plane signaling at the time of TSN PDU session establishment.

Specifically, if the RAN supports network layer parameter mapping, the network layer parameter mapping IE (e.g., parameter IE uses 8001H) may be appended to the (ETHERNET PORT MANAGEMENT CAPABILITY) command in the PMIC carried by PDU Session Setup, and brought to the AF through the control plane signaling path of the RAN-AMF-SMF-PCF-AF.

In other embodiments, the end node is a UPF;

referring to fig. 8, before receiving the outer layer parameter mapping capability information from the end node, further includes:

step S1700, sending an outer layer parameter mapping capability acquisition request to the UPF through the control plane signaling path;

in step S1420, the outer layer parameter mapping capability information from the UPF is received over the control plane signaling path.

In some embodiments, the AF needs to acquire the TSN capability of the UPF to determine whether network layer parameter mapping (outer layer parameter mapping) is supported.

Specifically, in step S1700, the AF encapsulates the GetCapability command (outer layer parameter mapping capability acquisition request) defined in the 3gpp 24519 protocol in the TSC (field of the 3gpp 29244 protocol) to send to the UPF through the control plane signaling path of the AF-PCF-SMF-UPF.

In step S1420, if the UPF supports network layer parameter mapping (outer layer parameter mapping), the parameter IE extended for this (e.g. 8001H) is encapsulated in the TSC and brought to the AF through the control plane signaling path of the UPF-SMF-PCF-AF.

In some embodiments, in step S1500, if the AF determines that both the RAN and the UPF carrying the TSN session support network layer mapping, the UPF or the RAN is subscribed to the GTPU tunnel information for the session.

Specifically, taking a subscription to UPF as an example, the AF operates using subscore-notify for parameter defined in 3gpp 24519 protocol through the AF-PCF-SMF-UPF delivery path, and designates the parameter of the subscription as GTPU tunnel information (e.g., parameter IE uses 8002H).

So far, the establishment of the GTPU tunnel of the TSN session is completed.

In some embodiments, in step S1600, GTPU tunnel information from the end node is obtained.

In some embodiments, after the GTPU tunnel is established, if the UPF or RAN serving as the end node receives a GTPU tunnel subscription request for the session, tunnel information (including a mapping relationship between TSN traffic and QFI) is reported to the AF or CNC device through a corresponding control plane signaling path.

Specifically, taking UPF reporting as an example, the UPF allocates an IPV6 GTPU tunnel for this TSN session, encodes tunnel information into a ETHERNET PORT MANAGEMENT NOTIFY command defined by 3gpp 24519 (e.g., parameter IE uses 8002H), encapsulates the command in the TSC, and brings the command to the CNC device through the control plane signaling path of the UPF-SMF-PCF-AF-CNC. If the end node is a RAN, the implementation procedure UPF is similar and will not be described in detail here.

Referring to fig. 9, in some embodiments, the CNC device is further communicatively connected to an intermediate node of the carrier network, the method further comprising:

Step S1800, generating intermediate node scheduling policy information according to the state information of the bearer network; the intermediate node scheduling policy information comprises mapping relation between the outer layer flow identification and the internal TC, and gating time slots corresponding to the service outflow ports and the internal TC;

step S1900 sends the intermediate node scheduling policy information to the intermediate node of the bearer network, so that the intermediate node can forward the service packet according to the intermediate node scheduling policy information.

In some embodiments, the intermediate nodes of the bearer network are TSN switches, and the CNC device decides, according to the status information of the bearer network, a scheduling flow table (intermediate node scheduling policy information) for distinguishing network layer parameters (FlowLabel) on each intermediate node on the forwarding path, and issues the scheduling flow table to each intermediate node of the TSN bearer network, so that the TSN bearer network schedules packets according to the policy.

Specifically, the CNC device issues the intermediate node scheduling policy information to each intermediate node through the NetConf interface. Each intermediate node distinguishes TSN traffic flows according to SrcIP+DstIP+FlowLabel and maps to TC; selecting a transmitting port according to the issued output port; and controlling the package sending time according to the gating list corresponding to the issuing TC.

The embodiment of the application realizes the deterministic scheduling of the TSN service flow in the 5GS virtual network bridge and the certainty of time delay. Compared with the technical scheme that delay guarantees are only made at the two ends of the 5G network bridge, the reliability of the embodiment of the application is better guaranteed.

According to the embodiment of the application, the TSN service flow is encapsulated in the TSN bearing network by utilizing the mapping relation between the inner layer flow identification and the outer layer flow identification, the service packet with the outer layer flow identification is formed, and the deterministic scheduling strategy information based on the outer layer flow identification is issued to each node of the TSN bearing network, so that the deterministic transmission of the corresponding TSN service flow in the bearing network is effectively ensured.

In addition, referring to fig. 10, the present application further provides a data transmission control method, applied to an end node in a bearer network, where the method includes:

step S2100, receiving a TSN traffic stream;

step S2200, receiving end node scheduling policy information from CNC equipment; the end node scheduling strategy information comprises a first mapping relation table and a sending scheduling list, wherein the first mapping relation table comprises a mapping relation between an inner layer flow identifier and an outer layer flow identifier;

step S2300, packaging TSN service flow according to the first mapping relation table to form service package with outer layer flow mark;

step S2400, transmitting the service packet according to the transmission schedule list.

In some embodiments, the end node is a RAN or UPF, the inner layer flow is identified as QFI, and the outer layer flow is identified as FlowLabel.

In some embodiments, referring to fig. 6, in step S2100, when the end node is a RAN, a TSN traffic stream sent from the first TSN end station is sent to the RAN through the DS-TT and the UE, and the RAN adds a QFI (QoS flow ID) flag to the TSN traffic stream according to the tunnel information (including a mapping relationship between the TSN traffic stream and an inner layer flow identifier). When the end node is a UPF, the TSN traffic stream sent from the second TSN end station is sent to the UPF through the NW-TT, and the UPF adds a QFI (QoS flow ID) flag to the TSN traffic stream according to the tunnel information (including the mapping relationship between the TSN traffic stream and the inner layer stream identifier).

In some embodiments, in step S2200, receiving end node scheduling policy information from a CNC device includes:

step S2210 receives end node scheduling policy information from the CNC device through a control plane signaling path.

In some embodiments, the control plane signaling path is a control plane signaling path of a core network and an access network in a 5G network system. Specifically, when the end node is RAN, in step S2210, the control plane signaling path is CNC-AF-PCF-SMF-AMF-RAN, and the end node scheduling policy information from the CNC device is received through AMF; when the end node is a UPF, in step S2210, the control plane signaling path is CNC-AF-PCF-SMF-UPF, and the end node scheduling policy information from the CNC device is received through the SMF.

In some embodiments, in step S2300, the UPF/RAN fills out the FlowLabel according to the issued QFI- > FlowLabel correspondence (first mapping relation table), and encapsulates the GTPU outer IPV6 header according to the QFI and the first mapping relation table, thereby forming a service packet with the FlowLabel.

In some embodiments, a data transmission control method includes:

the sending scheduling list comprises a mapping relation between an outer layer flow identifier and an internal TC, a service outflow port and a gating time slot corresponding to the internal TC;

In some embodiments, step S2400 includes:

step S2410, selecting a transmission port of a service packet according to a service outflow port;

step S2420, the sending timing of the service packet is controlled according to the mapping relation between the outer layer flow identifier and the internal TC and the gating time slot corresponding to the internal TC.

In some embodiments, the end node is a RAN or UPF;

referring to fig. 11, before receiving the end node scheduling policy information from the CNC device, further includes:

step S2500, transmitting GTPU tunnel information to CNC equipment through a control plane signaling path so that the CNC equipment generates end node scheduling strategy information according to the GTPU tunnel information, the characteristic information of TSN service flows and the state information of a bearing network;

in some embodiments, after the GTPU tunnel is established, if the UPF or RAN serving as the end node receives the GTPU tunnel subscription request of the session, the tunnel information (including the inner layer flow identifier of the TSN traffic flow, or including the mapping relationship between the TSN traffic flow and the QFI) is reported to the AF or CNC device through the corresponding control plane signaling path.

Referring to fig. 12, in some embodiments, before sending the GTPU tunnel information to the CNC device, further comprising:

step S2600, sending the outer layer parameter mapping capability information of the end node to CNC equipment;

step S2700, receiving a GTPU subscription request sent from a CNC device;

step S2800, generating GTPU tunnel information according to the GTPU subscription request.

In some embodiments, the end node performing steps S2600 to S2800 corresponds to the CNC device performing the aforementioned steps S1400 to S1600: that is, the end node transmits the outer layer parameter mapping capability information of the end node to the CNC device by performing step S2600, and the CNC device receives the outer layer parameter mapping capability information from the end node by performing the aforementioned step S1400; the CNC equipment sends a GTPU subscription request to the end node according to the outer layer parameter mapping capability information by executing the step S1500, and the end node receives the GTPU subscription request sent by the CNC equipment by executing the step S2700; the end node generates GTPU tunnel information according to the GTPU subscription request by executing step S2800, and the CNC device obtains the GTPU tunnel information from the end node by executing step S1600 described above.

In some embodiments, in step S2600, network layer mapping support capabilities (outer layer parameter mapping capability information) may be reported by the UPF/RAN as an end node, so that the CNC device perceives that network layer mapping policies and routing policies may be issued to the UPF/RAN.

In some embodiments, the end node is a RAN;

in some embodiments, in step S2600, sending the outer layer parameter mapping capability information of the end node to the CNC device includes:

in step S2610, the outer layer parameter mapping capability information of the end node is sent to the CNC device through the control plane signaling path.

In other embodiments, the end node is a UPF;

referring to fig. 13, before sending the outer layer parameter mapping capability information of the end node to the CNC device, further includes:

step S2900, receiving an outer layer parameter mapping capability acquisition request from CNC equipment through a control plane signaling path;

transmitting the outer layer parameter mapping capability information of the end node to the CNC device, comprising:

step S2620, according to the outer layer parameter mapping capability acquisition request, generating outer layer parameter mapping capability information;

In step S2630, the outer layer parameter mapping capability information of the end node is sent to the CNC device through the control plane signaling path.

Specifically, in step S2900, the AF encapsulates a GetCapability command (outer layer parameter mapping capability acquisition request) defined in the 3gpp 24519 protocol in the TSC through the control plane signaling path of the AF-PCF-SMF-UPF, and sends the encapsulated command to the UPF.

In steps S2620 and S2630, if the UPF supports network layer parameter mapping (outer layer parameter mapping), the parameter IE extended for this (e.g. 8001H) is encapsulated in the TSC and brought to the AF through the control plane signalling path of the UPF-SMF-PCF-AF.

Step S2700, receiving a GTPU subscription request sent from a CNC device;

in some embodiments, in step S2700, if the AF determines that both the RAN and the UPF carrying the TSN session support network layer mapping, subscribing to the UPF or RAN for GTPU tunnel information for the session; the UPF or RAN receives a GTPU subscription request sent by CNC equipment.

So far, the establishment of the GTPU tunnel of the TSN session is completed.

In some embodiments, in step S2800, GTPU tunnel information is generated according to the GTPU subscription request.

In some embodiments, after the GTPU tunnel is established, if the UPF or RAN serving as the end node receives the GTPU tunnel subscription request of the session, GTPU tunnel information is generated, and the tunnel information (including the mapping relationship between TSN traffic and QFI) is reported to the AF or CNC device through a corresponding control plane signaling path.

In addition, referring to fig. 14, the present application further provides a data transmission control method, applied to an intermediate node in a bearer network, where the method includes:

step S3100, receiving a service packet, wherein the service packet is formed by encapsulating a TSN service flow and provided with an outer layer flow identifier;

step S3200, receiving intermediate node scheduling policy information from CNC equipment; the intermediate node scheduling policy information comprises a transmission scheduling list;

in step S3300, a service packet is transmitted according to the transmission schedule list.

In some embodiments, the sending schedule list includes mapping relation between the outer layer flow identifier and the internal TC, and a service outflow port and a gating time slot corresponding to the internal TC;

according to the transmission scheduling list, transmitting the service packet comprises:

step S3310, selecting a sending port of the service packet according to the service outflow port;

Step S3320, controlling the sending time of the service packet according to the mapping relation between the outer layer flow identification and the internal TC and the gating time slot corresponding to the internal TC.

In some embodiments, the CNC device issues intermediate node scheduling policy information to each intermediate node over the NetConf interface. Each intermediate node distinguishes TSN traffic flows according to SrcIP+DstIP+FlowLabel and maps to TC; selecting a transmitting port according to the issued output port; and controlling the package sending time according to the gating list corresponding to the issuing TC.

The embodiments of the present application are described in detail below in conjunction with a specific example.

Example one

Referring to fig. 3, an example one takes an example that the bearer network includes a 5G network system, as described above, the TSN system regards the entire 5G network system as one logical bridge, and the entire 5G network system includes the TSN terminal UE, the radio access network, the intermediate node of the bearer network, and the core network; because in the 5G network bridge, a deterministic scheduling mechanism for TSN messages is not provided on a bearing network between the RAN and the UPF, forwarding certainty of the whole network bridge is unreliable. Thus, example one proposes a method of guaranteeing deterministic forwarding within a 5G bridge.

An example is that a network layer mapping supporting capability is reported through a UPF/RAN serving as an end node, so that CNC equipment perceives that a network layer mapping strategy and a routing strategy can be issued to the UPF/RAN; issuing a network layer mapping strategy to the UPF/RAN through CNC equipment, and mapping the TSN service flow into a network layer identifier (outer layer flow identifier), so that the bearing network equipment can distinguish the TSN service flow of the inner layer according to the network layer identifier of the outer layer of the message; subscribing the GTPU tunnel information used by the DS-TT port to the UPF/RAN through CNC equipment, so that the UPF/RAN reports the GTPU tunnel information to the CNC equipment after the tunnel is established; reporting GTPU tunnel information used by a current DS-TT port through UPF/RAN, so that CNC equipment can decide a forwarding path which is decided for the tunnel and supports deterministic scheduling; issuing the routing strategy decided in the previous step to the UPF/RAN through CNC equipment, so that a service packet sent by the UPF/RAN is led to a TSN supporting bearer network selected for the service; and transmitting a deterministic scheduling strategy based on the network layer identification to each node of the bearing network to ensure the deterministic transmission of the responding TSN service flow in the 5G network bridge.

The method for guaranteeing deterministic forwarding in a 5G network bridge of the invention refers to fig. 15, and comprises the following main flow steps:

e101, if the AF does not acquire the TSN capability of the UPF selected by the current TSN session, acquiring the TSN capability from the UPF along a control plane signaling path; if the UPF supports network layer parameter mapping, this capability is reported to the AF.

And E102, if the RAN accessed by the UE supports network layer parameter mapping, carrying the capability and reporting to the AF along a control plane signaling path when the TSN PDU session is established.

E103, if the AF determines that the RAN and UPF carrying the TSN session support network layer mapping, subscribing the GTPU tunnel information of the session to the UPF or RAN.

And E104, after the establishment of the GTPU tunnel is completed, if the UPF/RAN receives a GTPU tunnel subscription request of the session, reporting the GTPU tunnel information (such as a mapping relation between TSN-containing service flows and QFI) to the AF/CNC.

And E105, the CNC receives the GTPU tunnel information, refers to the information such as the traffic burst period, traffic flow, network delay, reserved resources of the TSN bearing network and the like of the TSN network, and decides (forwarding path, QFI and network layer parameter mapping table, and sending scheduling list) to issue to the UPF/RAN. When the UPF/RAN encapsulates the GTPU message according to the information, different network layer parameters (FlowLabel) are set for different QFIs, mapping from an inner layer to an outer layer is realized, and the UPF/RAN sends packets according to a scheduling list and a forwarding path, and performs flow scheduling according to an outer layer identifier, as shown in figure 6.

And E106, the CNC decides a dispatching flow table (intermediate node dispatching strategy information) for distinguishing network layer parameters on each node on the forwarding path according to the information (state information of the bearing network), and sends the dispatching flow table to each node of the TSN bearing network. The TSN bearing network dispatches and sends packets according to a strategy.

The process flow steps of the exemplary embodiments of this example section, and refined or alternative embodiments of each of the main steps, are described below:

e101, the AF needs to acquire the TSN capability of the UPF to determine whether to support network layer parameter mapping.

Specifically, the AF encapsulates a defined GetCapability command in the 3GPP 24519 protocol in the TSC to the UPF via the AF-PCF-SMF-UPF delivery path (control plane signaling path).

If the UPF supports transport layer parameter mapping, the parameter IE (e.g., 8001H) extended for this is encapsulated in the TSC and brought to the AF through the UPF-SMF-PCF-AF path.

And E102, if the RAN accessed by the UE supports network layer parameter mapping, carrying the capability and reporting to the AF along control plane signaling when the TSN PDU session is established.

Specifically, if the RAN supports network layer parameter mapping, the network layer parameter mapping IE is appended in the (ETHERNET PORT MANAGEMENT CAPABILITY) command in the carried PMIC of PDU Session Setup (e.g., parameter IE uses 8001H), and the path through the RAN-AMF-SMF-PCF-AF is brought to the AF.

Specifically, taking a subscription to UPF as an example, the AF uses a defined subscore-notify for parameter operation in 24519 protocol through the AF-PCF-SMF-UPF delivery path, and designates the parameter of the subscription as GTPU tunnel information (e.g., parameter IE uses 8002H).

And E104, after the UPF completes the establishment of the GTPU tunnel, if the UPF/RAN receives the GTPU tunnel subscription request of the session, reporting tunnel information (including the mapping relation between the TSN service flow and the QFI) to the AF/CNC.

Specifically, taking UPF reporting as an example, the UPF allocates an IPV6 GTPU tunnel for this TSN session, and encodes tunnel information into ETHERNET PORT MANAGEMENT NOTIFY commands defined by 24519 (e.g., parameters IE uses 8002H) encapsulated in the TSC, and takes the path through the UPF-SMF-PCF-AF-CNC to the CNC.

And E105, the CNC receives the GTPU tunnel information, refers to the information such as the traffic burst period, traffic flow, network delay, reserved resources of the TSN bearing network and the like of the TSN network, and decides (forwarding path, QFI and network layer parameter mapping table, and sending scheduling list) to issue to the UPF/RAN. And when the UPF/RAN packages the GTPU message according to the information, different network layer transferring parameters are applied to different QFIs, and the package is sent according to a dispatching list and a transferring path.

Specifically, the CNC device maintains a time delay table (i.e. time delay information of each node of the bearer network) of a TSN service flow reaching each node of the bearer network, a traffic scheduling time slot occupation table and a flowLabel allocation table corresponding to the TSN service flow.

The CNC device allocates an IPv6 FlowLabel to the TSN traffic by executing step S1220, so that the GTPU outer layer srccip+dstid+flowlabel can uniquely identify the current TSN traffic.

The CNC device generates a QFI- > FlowLabel correspondence (a first mapping relationship table) according to the recorded TSN traffic- > FlowLabel correspondence (the allocated outer layer flow identifier) and the TSN traffic- > QFI correspondence (GTPU tunnel information) reported by the UPF by executing step S1230.

And E106, the CNC decides a scheduling flow table for distinguishing network layer parameters on each node on the forwarding path according to the information, and transmits the scheduling flow table to each node of the TSN bearing network. The TSN bearing network dispatches and sends packets according to a strategy.

Specifically, the CNC issues the information in E105 to each node through the NetConf interface. Each node distinguishes the service flow according to SrcIP+DstIP+FlowLabel and maps to TC; selecting a transmitting port according to the issued output port; and controlling the package sending time according to the gating list corresponding to the issuing TC.

In addition, the present application also provides a CNC device, comprising: the computer program comprises a first memory, a first processor and a computer program stored in the first memory and capable of running on the first processor, wherein the first processor realizes the data transmission control method applied to the CNC equipment when executing the computer program.

The memory, as a non-transitory computer readable storage medium, may be used to store non-transitory software programs as well as non-transitory computer executable programs. In addition, the memory may include high-speed random access memory, and may also include non-transitory memory, such as at least one magnetic disk storage device, flash memory device, or other non-transitory solid state storage device. In some embodiments, the memory optionally includes memory remotely located relative to the processor, the remote memory being connectable to the processor through a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.

It should be noted that, the CNC device in the present embodiment may be applied to a CNC device in the system architecture of the embodiment shown in fig. 3; in addition, the CNC device in the present embodiment may perform the data transmission control method in the embodiment shown in fig. 5. That is, the CNC device in the present embodiment and the CNC device in the system architecture of the embodiment shown in fig. 3, and the data transmission control method in the embodiment shown in fig. 5 all belong to the same inventive concept, so that these embodiments have the same implementation principle and technical effects, and will not be described in detail herein.

The non-transitory software program and instructions required to implement the data transmission control method of the above-described embodiment are stored in the memory, and when executed by the processor, the data transmission control method of the above-described embodiment is performed, for example, the method steps S1100 to S1300 in fig. 5, the method steps S1400 to S1300 in fig. 7, the method steps S1700 to S1300 in fig. 8, and the method steps S1100 to S1900 in fig. 9 described above are performed.

In addition, the application further provides a bearer network end node device, which comprises: the second memory, the second processor and the computer program stored in the second memory and capable of running on the second processor, when the second processor executes the computer program, the second processor implements the data transmission control method applied to the bearing network end node device as described above.

It should be noted that, the bearer network end node device in this embodiment may be applied as the bearer network end node device in the system architecture of the embodiment shown in fig. 3; in addition, the bearer network end node device in this embodiment may perform the data transmission control method in the embodiment shown in fig. 10. Namely, the bearer network end node device in the present embodiment and the bearer network end node device in the system architecture of the embodiment shown in fig. 3, and the data transmission control method in the embodiment shown in fig. 10 all belong to the same inventive concept, so that these embodiments have the same implementation principle and technical effects, and are not described in detail herein.

The non-transitory software program and instructions required to implement the data transmission control method of the above-described embodiment are stored in the memory, and when executed by the processor, the data transmission control method of the above-described embodiment is performed, for example, the method steps S2100 to S2400 in fig. 10, the method steps S2500 to S2400 in fig. 11, the method steps S2600 to S2400 in fig. 12, and the method steps S2900 to S2400 in fig. 13 described above are performed.

In addition, the application further provides a bearer network intermediate node device, which comprises: the third memory, the third processor and the computer program stored in the third memory and executable on the third processor, the third processor implementing the data transmission control method as described above applied to the bearer network intermediate node device when executing the computer program.

It should be noted that, the bearer network intermediate node device in this embodiment may be applied to the bearer network intermediate node device in the system architecture of the embodiment shown in fig. 3; in addition, the bearer network intermediate node device in the present embodiment may perform the data transmission control method in the embodiment shown in fig. 14. Namely, the bearer network intermediate node device in the present embodiment and the bearer network intermediate node device in the system architecture of the embodiment shown in fig. 3, and the data transmission control method in the embodiment shown in fig. 14 all belong to the same inventive concept, so that these embodiments have the same implementation principle and technical effects, and are not described in detail herein.

The non-transitory software program and instructions required to implement the data transmission control method of the above-described embodiment are stored in the memory, and when executed by the processor, the data transmission control method in the above-described embodiment is executed, for example, the method steps S3100 to S3300 in fig. 14 described above are executed.

In addition, the application also provides a data transmission system, which comprises:

a CNC device as described above; for example, the CNC device may be used to perform the above-described method steps S1100 to S1300 in fig. 5, the method steps S1400 to S1300 in fig. 7, the method steps S1700 to S1300 in fig. 8, and the method steps S1100 to S1900 in fig. 9.

The first bearing network end node equipment is in communication connection with the first TSN end station and is the bearing network end node equipment as described above; for example, the first bearer network end node device may be configured to perform the method steps S2100 through S2400 in fig. 10, the method steps S2500 through S2400 in fig. 11, the method steps S2600 through S2400 in fig. 12, and the method steps S2900 through S2400 in fig. 13 described above.

At least one bearer network intermediate node device as described above, the bearer network intermediate node device being communicatively coupled to the first bearer network end node device; for example, the bearer network intermediate node device may be used to perform the method steps S3100 to S3300 in fig. 14 described above.

And the second bearing network end node equipment is in communication connection with the bearing network intermediate node equipment, and the second bearing network end node equipment is the bearing network end node equipment as described above. For example, the second bearer network end node device may be configured to perform the method steps S2100 through S2400 in fig. 10, the method steps S2500 through S2400 in fig. 11, the method steps S2600 through S2400 in fig. 12, and the method steps S2900 through S2400 in fig. 13 described above.

In some embodiments, the bearer network comprises a 5G bridge. Referring to fig. 3, fig. 3 is a schematic diagram of a system architecture of a data transmission system according to an embodiment of the present application. In the example of fig. 3, the system architecture includes a CNC device, a first TSN end station, a carrier network, and a second TSN end station. The first TSN end station, the bearing network and the second TSN end station are connected in sequence, and the CNC equipment is used for controlling the bearing network to forward the TSN service flow according to the characteristic information of the TSN service flow and the state information of the bearing network. The bearer network comprises a first bearer network end node device, at least one bearer network intermediate node device and a second bearer network end node device. For example, the bearer network may be a mobile communication system including a TSN radio access terminal UE, an access network RAN, an intermediate bearer node, and a core network including AF, PCF, SMF, AMF, UPF.

The CNC device is used for controlling the bearing network to forward the TSN service flow according to the characteristic information of the TSN service flow and the state information of the bearing network. In some embodiments, the system further includes one or more CUC devices, each connected to the first TSN end station and the second TSN end station, for obtaining TSN traffic flow transmission requirements from the first TSN end station or the second TSN end station, the CNC device receiving user periodic time-related requirements formulated from the CUC device, and calculating a TSN configuration to satisfy the requirements.

Referring to fig. 3, in some embodiments, the first bearer network end node device is a RAN, the second bearer network end node device is a UPF, the system architecture further includes a DS-TT, a UE, an NW-TT, and a UPF, and the first TSN end station establishes a TSN traffic communication connection with the second TSN end station sequentially through the DS-TT, UE, RAN, the intermediate bearer node, the UPF, and the NW-TT. CNC equipment is connected with UPF through AF, PCF, SMF in sequence; the CNC device is in turn communicatively connected to the RAN via AF, PCF, SMF, AMF.

Referring to fig. 4, in other embodiments, the first bearer network end node device is a first RAN, the second bearer network end node device is a second RAN, the system architecture further includes a first DS-TT, a second DS-TT, a first UE, and a second UE, and the first TSN end station establishes a TSN traffic flow communication connection with the second TSN end station sequentially through the DS-TT, the first UE, the first RAN, the intermediate bearer node, the second RAN, the second UE, and the second DS-TT. The CNC device is in turn communicatively coupled to the first RAN and the second RAN, respectively, via AF, PCF, SMF, AMF.

Referring to fig. 16, in some embodiments, a data transmission system includes multiple sets of TSN virtual bridges;

each set of TSN virtual network bridge comprises a first bearing network end node device and a second bearing network end node device;

each set of TSN virtual network bridge is in communication connection with CNC equipment and forwards data packets through bearing network intermediate node equipment.

The application environment is shown in fig. 3, and the CNC device uses the 5GS system as a logic bridge of the TSN, so as to realize connection and control of multiple TSN networks. The network elements within the TSN 5GS virtual bridge are shown in fig. 3.

The device and networking relationship according to the present invention is shown in fig. 16 (two sets of TSN 5GS virtual bridges are shown as an example). Wherein the RAN < - > UPF bearer networks in multiple sets of TSN 5GS virtual bridges can share a set of TSN switching networks (which can include multiple TSN switches) under the control of the same CNC equipment. According to the embodiment of the application, the TSN switching network resources are shared by the multiple sets of TSN 5GS virtual bridges, so that the network construction cost is saved.

In addition, embodiments of the present application also provide a computer-readable storage medium storing computer-executable instructions for:

the foregoing data transmission control method is executed.

In some embodiments, the computer-readable storage medium stores computer-executable instructions that are executed by a processor or controller, for example, by a processor in the above-described electronic device embodiment, which may cause the processor to perform the data transmission control method in the above-described embodiment, for example, performing the method steps S1100 to S1300 in fig. 5, the method steps S1400 to S1300 in fig. 7, the method steps S1700 to S1300 in fig. 8, the method steps S1100 to S1900 in fig. 9, the method steps S2100 to S2400 in fig. 10, the method steps S2500 to S2400 in fig. 11, the method steps S2600 to S2400 in fig. 12, the method steps S2900 to S2400 in fig. 13, and the method steps S3100 to S3300 in fig. 14.

Those of ordinary skill in the art will appreciate that all or some of the steps, systems, and methods disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof. Some or all of the physical components may be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on computer readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media). The term computer storage media includes both volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data, as known to those skilled in the art. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital Versatile Disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can be accessed by a computer. Furthermore, as is well known to those of ordinary skill in the art, communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media.

While the preferred embodiments of the present application have been described in detail, the embodiments are not limited to the above-described embodiments, and various equivalent modifications and substitutions can be made by those skilled in the art without departing from the spirit of the embodiments, and these equivalent modifications and substitutions are intended to be included in the scope of the embodiments of the present application as defined in the appended claims.

Claims

1. A data transmission control method applied to a CNC device communicatively connected to an end node of a bearer network, the method comprising:

2. The method of claim 1, wherein the step of determining the position of the substrate comprises,

the state information of the bearing network comprises time delay information, traffic scheduling time slot occupation information and a second mapping relation table of each node of the bearing network, wherein the second mapping relation table comprises mapping relation between TSN service flows and outer layer flow identifiers;

generating end node scheduling policy information according to the GTPU tunnel information, characteristic information of TSN service flows, and status information of a bearer network, including:

selecting a forwarding path meeting preset requirements from the alternative paths according to the state information of the bearing network;

distributing an outer layer flow identifier for the TSN service flow;

generating the first mapping relation table according to the outer layer flow identification and the GTPU tunnel information;

establishing a mapping relation between the outer layer flow identification and the internal TC;

and distributing a service outflow port and a gating time slot corresponding to the internal TC for the TSN service flow according to the characteristic information of the TSN service flow and the state information of the bearer network.

3. The method according to claim 1, wherein the end node is a RAN or a UPF;

The obtaining the GTPU tunnel information of the TSN session includes:

the GTPU tunnel information from the end node is obtained through a control plane signaling path;

the sending the end node scheduling policy information to the end node of the bearer network comprises:

and sending the end node scheduling policy information to the end node of the bearing network through a control plane signaling path.

4. The method of claim 1, wherein prior to obtaining GTPU tunnel information for the TSN session, further comprising:

receiving outer layer parameter mapping capability information from the end node;

sending a GTPU subscription request to the end node according to the outer layer parameter mapping capability information;

and acquiring GTPU tunnel information from the end node.

5. The method of claim 4, wherein the end node is a RAN;

the receiving outer layer parameter mapping capability information from the end node includes:

outer layer parameter mapping capability information is received from the end node over a control plane signaling path.

6. The method of claim 4, wherein the end node is a UPF;

before receiving the outer layer parameter mapping capability information from the end node, the method further comprises:

Sending an outer layer parameter mapping capability acquisition request to the UPF through a control plane signaling path;

and receiving the mapping capability information of the outer layer parameters from the UPF through a control plane signaling path.

7. The method according to any of claims 1 to 5, wherein the inner layer flow is identified as MAC address, VLAN address or QFI and the outer layer flow is identified as FlowLabel.

8. The method of claim 2, wherein the CNC device is further communicatively coupled to an intermediate node of a carrier network, the method further comprising:

generating intermediate node scheduling policy information according to the state information of the bearing network; the intermediate node scheduling policy information comprises a mapping relation between an outer layer flow identifier and an internal TC, a service outflow port and a gating time slot corresponding to the internal TC;

and sending the intermediate node scheduling policy information to an intermediate node of the bearing network, so that the intermediate node can forward the service packet according to the intermediate node scheduling policy information.

9. A data transmission control method applied to an end node in a bearer network, the method comprising:

Receiving a TSN service flow;

10. The method of claim 9, comprising:

the sending the service packet according to the sending scheduling list comprises the following steps:

selecting a sending port of the service packet according to the service outflow port;

and controlling the sending time of the service packet according to the mapping relation between the outer layer flow identifier and the internal TC and the gating time slot corresponding to the internal TC.

11. The method according to claim 9, wherein the end node is a RAN or a UPF;

before receiving the end node scheduling policy information from the CNC device, the method further includes:

transmitting GTPU tunnel information to the CNC equipment through a control plane signaling path, so that the CNC equipment generates end node scheduling policy information according to the GTPU tunnel information, the characteristic information of TSN service flows and the state information of a bearing network;

The receiving end node scheduling policy information from a CNC device includes:

end node scheduling policy information is received from the CNC device via a control plane signaling path.

12. The method of claim 9, wherein prior to sending GTPU tunnel information to the CNC device, further comprising:

sending outer layer parameter mapping capability information of an end node to the CNC equipment;

receiving a GTPU subscription request sent by the CNC equipment;

and generating the GTPU tunnel information according to the GTPU subscription request.

13. The method according to claim 12, wherein the end node is a RAN;

the sending end node's outer layer parameter mapping capability information to the CNC device includes:

and sending the outer layer parameter mapping capability information of the end node to the CNC equipment through a control plane signaling path.

14. The method of claim 12, wherein the end node is a UPF;

before the outer layer parameter mapping capability information of the sending end node is sent to the CNC device, the method further comprises:

receiving an outer layer parameter mapping capability acquisition request from CNC equipment through a control plane signaling path;

Generating outer layer parameter mapping capability information according to the outer layer parameter mapping capability acquisition request;

15. The method according to any of claims 9 to 14, wherein the inner layer flow is identified as MAC address, VLAN address or QFI and the outer layer flow is identified as FlowLabel.

16. A data transmission control method applied to an intermediate node in a bearer network, the method comprising:

17. The method of claim 16, wherein the step of determining the position of the probe comprises,

A cnc device, comprising: a first memory, a first processor and a computer program stored in the first memory and executable on the first processor, wherein the first processor implements the data transmission control method according to any one of claims 1 to 8 when executing the computer program.

19. A bearer network end node device comprising: a second memory, a second processor and a computer program stored in the second memory and executable on the second processor, wherein the second processor implements the data transmission control method according to any one of claims 9 to 15 when executing the computer program.

20. A bearer network intermediate node device comprising: a third memory, a third processor and a computer program stored in the third memory and executable on the third processor, wherein the third processor implements the data transmission control method according to claim 16 or 17 when executing the computer program.

21. A data transmission system, comprising:

The CNC device of claim 18;

a first bearer network end node device in communication with said first TSN end station, said first bearer network end node device being a bearer network end node device as claimed in claim 19;

at least one bearer network intermediate node device according to claim 20, said bearer network intermediate node device being communicatively connected to said first bearer network end node device;

a second bearer network end node device in communication with said bearer network intermediate node device, said second bearer network end node device being a bearer network end node device as claimed in claim 19;

22. The system of claim 21, comprising multiple sets of TSN virtual bridges;

each set of TSN virtual bridges includes the first bearer network end node device and the second bearer network end node device;

each set of TSN virtual network bridge is in communication connection with the CNC equipment and forwards data packets through the bearing network intermediate node equipment.

23. A computer-readable storage medium storing computer-executable instructions for:

a data transmission control method according to any one of claims 1 to 17.