CN117295088A

CN117295088A - Implementation method and system of 5G endogenous deterministic workshop network

Info

Publication number: CN117295088A
Application number: CN202311192699.1A
Authority: CN
Inventors: 李希金; 安岗; 霍明德; 唐尚禹; 张艳
Original assignee: Chongqing Digital Intelligence Integration Innovation Technology Co ltd; Research Institute of China United Network Communications Corp Ltd
Current assignee: Chongqing Digital Intelligence Integration Innovation Technology Co ltd; Research Institute of China United Network Communications Corp Ltd
Priority date: 2023-09-15
Filing date: 2023-09-15
Publication date: 2023-12-26

Abstract

The invention discloses a realization method and a system of a 5G endogenous deterministic workshop network, wherein the method is based on a local lightweight 5G core network, local reconstruction network elements of a fully-connected factory, customizing and expanding deterministic signaling according to the requirements of the deterministic workshop network, constructing an endogenous deterministic management plane of the workshop network based on the 5G signaling network, carrying out endogenous deterministic transmission, dividing the application of the deterministic transmission of the fully-connected factory into different layers, dividing each layer into the same deterministic micro-slice, and constructing an endogenous deterministic base station of the workshop network; based on the switching pattern of the user plane function UPF, an endogenous deterministic UPF is constructed. By adopting the technical scheme, the local lightweight 5G core network deployment mode of the 5G network is utilized, the regional production field of the fully-connected factory is used as a target based on the open UPF and the base station architecture, the endophytic deterministic transmission between terminals of the workshop network is realized, and the deterministic transmission of a high-reliability and low-delay production workshop is ensured.

Description

Implementation method and system of 5G endogenous deterministic workshop network

Technical Field

The invention belongs to the technical field of digital factories, and relates to a method and a system for realizing a 5G endogenous deterministic workshop network.

Background

The "5G full-connection factory" requires a large number of deterministic data transmission scenarios with low latency, low jitter, low packet loss rate and high reliability, and among a series of deterministic network technologies, TSN (Time-Sensitive Networking, time-sensitive network) is an L2 layer technical standard and is the most mature deterministic protocol at present. The 5G and TSN are fused, and mobility deterministic transmission of a fully-connected factory can be realized.

3GPP (3 rd Generation Partnership Project, third Generation partnership project) is stepping from R16 release to provide 5G deterministic support. The fusion scheme of the R16 version 5G and the TSN network, the 5G is in butt joint with the TSN network, the time delay and jitter are further reduced based on a URLLC (Ultra-Reliable Low-Latency Communications) technology, the reliability is improved, and the deterministic application of industrial manufacturing scenes is met in a larger range. The R17 version 5G supports TSN, deterministic service can be independently provided without fusion with a TSN network, and deployment is simpler, more convenient and more flexible. R18 version and 5G fusion DetNet (deterministic network) technology can be interconnected and intercommunicated with industrial Internet distributed in various places to complete large-scale industry chain collaboration.

The 5G full-connection factory defines the connection hierarchy of the industrial Internet, and comprises three stages of a factory level, a workshop level and a production line level. The network construction mode of the traditional factory firstly builds a ' factory-level ' park network ', the network coverage is wider, and the park network and the public user network are shared. The network construction mode of the traditional factory firstly builds a ' factory-level ' park network ', the network coverage range is wider, and the park network and the public user network adopt a sharing mode.

For deterministic networks, this traditional "campus network" model presents a significant problem. The 'park net' solves all connection problems by one net as much as possible, thus causing the upgrading cost of the deterministic transmission of the whole park net support to be high and the construction period to be long. Moreover, the 5G deterministic standard is changing, and operators are more prone to deploying experimental networks for experimental network operation than large-scale deployment, which results in a long period of deterministic service to service fully-connected plants. In addition, the requirements of different production workshops on deterministic transmission are different, and the conventional 'campus network' mode can not guarantee the deterministic transmission of the high-reliability and low-delay production workshops due to the fact that public network access and internet access are considered.

Disclosure of Invention

The invention aims to provide a method and a system for realizing a 5G endogenous deterministic workshop network, which are used for solving the problem that network resources cannot guarantee deterministic transmission of a high-reliability and low-delay production workshop.

In order to achieve the above purpose, the basic scheme of the invention is as follows: a realization method of a 5G endogenous deterministic workshop network comprises the following steps:

based on a local lightweight 5G core network, reconstructing access and mobile management function AMF, session management function SMF, unified data management function UDM and policy control function PCF network elements in a full-connection factory;

customizing and expanding deterministic signaling according to the requirements of a deterministic workshop network, constructing a workshop network endogenous deterministic management plane based on a 5G signaling network, and carrying out endogenous deterministic transmission;

dividing the application of the deterministic transmission of the fully-connected factory into different layers by adopting a layered deterministic micro-slicing method, wherein each layer is divided into the same deterministic micro-slice;

the central unit CU based on the Open RAN separated architecture carries out deterministic data processing to construct a workshop network endophytic deterministic base station;

based on the switching pattern of the user plane function UPF, an endogenous deterministic UPF is constructed.

The working principle and the beneficial effects of the basic scheme are as follows: according to the technical scheme, the local lightweight 5G core network deployment mode of the 5G network is utilized, the function expansion convenience brought by white box based on an open UPF and base station architecture is utilized, the regional production field of a fully-connected factory is used as a target, the endophytic deterministic transmission between terminals of a workshop network is realized, and the deterministic transmission of a high-reliability and low-delay production workshop is ensured.

Further, according to the requirements of the deterministic workshop network, the method for customizing and expanding the deterministic signaling comprises the following steps:

the terminal sends a PDU (Protocol Data Unit ) session establishment request to the AMF, including deterministic transmission requirements;

AMF sends session creation context request instruction Nsmf_PDUSion_ CreateSMContext Request to request to establish PDU session, and the message includes the deterministic transmission requirement of session;

the SMF replies a session return context request instruction Nsmf_PDUSion_ CreateSMContext Response to the AMF, which indicates a session establishment result, if the establishment is successful, ID information of a session context is returned to the AMF, and if the session establishment fails, a rejection reason is returned;

the SMF selects PCF, the SMF and PCF execute a session policy establishment flow, and the PCF generates a session related deterministic resource reservation policy and a UPF resource reservation policy according to the endogeneous deterministic transmission policy and the deterministic demand of the session;

the SMF initiates an N4 session establishment request to the selected UPF, wherein the request comprises the deterministic transmission requirement of the session and the resource reservation of the UPF, and the UPF returns an N4 establishment result;

the SMF sends a Communication message sending instruction Namf_communication_N1N2MessageTransfercarrying N1 Container and N2 Container to the AMF; n1 Container is a session establishment result sent to the terminal by SMF, including a deterministic transmission resource reservation result; n2 Container is a resource establishment request sent to gNB by SMF, wherein the request comprises radio resource reserved by base station for the session;

AMF sends response message for Namf_communication_N1N2MessageTransferto SMF;

the AMF sends PDU session request message N2 PDU Session Request to the gNB and carries session establishment acceptance message PDU Session Establishment Accept, which contains wireless resource requiring the base station to reserve for the session;

the gNB replies N2 PDU Session Reponse information to the AMF and carries the downlink deterministic tunnel endpoint information; the establishment of the uplink deterministic data channel of the terminal is completed;

AMF sends PDU conversation updating context request instruction Nsmf_PDUSion_ UpdateSMContext Request to SMF, carrying base station side deterministic resource reservation and tunnel endpoint information;

the SMF initiates a message modification request instruction N4 Session Modification Request to the UPF, and carries downlink determination of the reservation of the downlink resources and tunnel information;

the UPF sends a session modification response instruction N4 Session Modification Reponse to the SMF;

UPF obtains the result of downlink resource reservation and tunnel endpoint information at the base station side, and the establishment of downlink deterministic data channel is completed.

And the endogeneous deterministic resource management unit carries out corresponding configuration on the resources on the deterministic network node through deterministic expansion signaling according to the resource reservation and planning result.

Further, the method for locally reconstructing AMF, SMF, UDM, PCF network elements in the fully-connected factory comprises the following steps:

the AMF is connected with the base station through an N2 interface, is connected with the SMF through an N11 interface, is connected with the PCF through an N15 interface, and is connected with a NSSF network element with a network slice selection function through an N22 interface;

the SMF is connected with the UPF through an N4 interface, and controls the UPF and configures the flow and the orientation of the UPF;

the deterministic terminal initiates a deterministic PDU session request to the SMF through the base station and the AMF;

the SMF acquires an endophytic deterministic policy rule from the PCF after receiving the request;

the network data analysis function NWDAF provides load layer data to the PCF at the shop network deterministic slice, the PCF collects network state information of the shop network deterministic slice directly from the NWDAF, provides the PCF with policy decisions, and provides other parts of the deterministic management plane to use the data.

And a lightweight 5G core network with a simple structure is locally deployed in a fully-connected factory, so that the use is facilitated.

Further, the method for constructing the workshop network endogenous deterministic management plane based on the 5G signaling network comprises the following steps:

the SMF establishes a session with the UPF to establish a user plane connection;

SMF initiates a radio resource request aiming at endophytic certainty to a base station;

after receiving the request, the base station sets corresponding wireless resources and replies the request of SMF;

after receiving the reply, the SMF informs the UPF to establish a deterministic transmission link from the UPF to the base station;

the user plane function UPF controls the NW-TT to complete the switching and handover to deterministic forward and reverse links, ultimately generating a deterministic connection.

The operation is simple, and the use is facilitated.

Further, the method for carrying out the endogenous deterministic transmission comprises the following steps:

the method comprises the steps that a deterministic terminal of a fully-connected factory signs a hierarchical deterministic workshop network and distributes a slice identifier, and when the terminal is accessed to the network, a base station forwards a signaling to a local deterministic signaling surface network element according to the slice identifier;

the signaling surface network element establishes the data surface bearing on the corresponding UPF for processing deterministic traffic and the 5G base station with deterministic capacity according to the signed slice identification, exchanges uplink deterministic data through a deterministic exchange unit of the UPF, returns the uplink deterministic data as downlink data to the UPF, and forwards the uplink deterministic data to a deterministic data receiving terminal by the UPF to complete endophytic deterministic transmission.

And the endogenous deterministic resource management unit carries out corresponding configuration on the resources on the deterministic network node through deterministic expansion signaling according to the resource reservation and planning results, and ensures the service quality of deterministic traffic.

Further, the specific method of microtome delamination is as follows:

aiming at the application functions of data processing, control protocol and monitoring feedback functions, adopting a fine granularity slice layering scheme, and setting a sensing layer micro slice aiming at the application scenes of a field basic sensing node, data and video acquisition node;

setting a control layer micro-slice aiming at an application scene of an execution control device, a mechanical arm and an industrial robot;

aiming at application scenes of the control feedback node and the control supervision node, setting a supervision layer micro-slice;

aiming at the application functions of PLC, artificial intelligence and machine learning, setting a device layer micro-slice for field control application scenes;

aiming at the functions of production scheduling, scheduling and maintenance application, the method sets inter-vehicle layer micro-slicing for field production execution application scenes.

Micro slices meeting deterministic requirements are divided for different production areas on a 5G network through a slicing technology, the micro slices are provided with independent network wireless resources, transmission resources and UPFs for completing endophytic deterministic routing and switching, and deterministic data transmission from UE to UE on a production site is realized.

Further, the network slice adopts a single network slice to select the auxiliary information S-NSSAI mark, and the deterministic terminal signs one or more S-NSSAI on the UDM to realize signs one or more hierarchical deterministic slices;

and carrying the S-NSSAI when the deterministic terminal accesses the network, and enabling the network to access the terminal to the corresponding hierarchical slice according to the S-NSSAI.

Thus, signing one or more hierarchical deterministic slices is achieved to meet the requirements of complex applications at the production site.

Further, the method for constructing the workshop network endophytic deterministic base station is as follows:

the Ethernet interface between the central unit CU and the distributed units DU is updated to be a TSN interface, and the intermediate transmission links between the CU and the DUs are realized by adopting a TSN switch;

the digital processing unit of the CU completes a TSN network management protocol, and performs high-precision time synchronization of a workshop network and resource management of a 5G RAN base station;

the CU deploys a local deterministic master clock, the CU controls DU to carry deterministic clock information in broadcast or dedicated signaling, and the UE acquires the clock information after synchronizing with the base station;

the CU transmits the clock to the UPF through the connection with the local core network, so that the clock of the deterministic unit of the UPF is synchronous with the master clock;

and according to the offline resource reservation and planning results, correspondingly configuring the resources on the switch and the network interface adapter, and simultaneously configuring the wireless resources of the DU.

And the deterministic management carries out corresponding configuration on the resources on the switch and the network interface adapter according to the offline resource reservation and planning result, and simultaneously carries out configuration on the wireless resources of the DU, thereby being beneficial to use.

Further, the method for constructing the endogeneous deterministic UPF comprises the following steps:

the endogenous deterministic UPFs are deployed in different deterministic layering slices, and the UPFs of different deterministic layering are connected through a time sensitive network TSN switch;

the deterministic port of the central unit of the base station transmits the uplink deterministic traffic to the TSN exchanger through the tunnel, the TSN exchanger exchanges to the downlink tunnel of the UPF, and then returns to the base station to perform the endogenous forwarding of the UPF and the deterministic exchange between different UPFs.

The UPFs are deployed into different deterministic layering slices, the UPFs of the different deterministic layering are connected with each other through a TSN switch, so that the endogenous forwarding of the UPFs and the deterministic exchange among the different UPFs are realized, and the use requirements are met.

The invention also provides a system for realizing the 5G endophytic deterministic workshop network based on the method, which comprises a workshop network endophytic deterministic management surface, a layered micro-slicing module, a workshop network endophytic deterministic base station and an endophytic deterministic UPF;

the workshop network endogenous deterministic management surface is connected with the layered micro-slicing module, the layered micro-slicing module is respectively connected with the deterministic terminal and the endogenous deterministic UPF, and the endogenous deterministic UPF is connected with the workshop network endogenous deterministic base station.

The system is beneficial to constructing a 5G endogenous deterministic workshop network, and meets the use requirements of digital factories.

Drawings

FIG. 1 is a schematic diagram of the implementation of the 5G endogenous deterministic plant network of the present invention;

fig. 2 is a schematic structural diagram of AMF, SMF, UDM and PCF network elements of the implementation method of the 5G endophytic deterministic workshop network of the present invention;

FIG. 3 is a schematic diagram of the architecture of a local endogenous deterministic UPF of the method of implementation of the 5G endogenous deterministic plant network of the present invention;

FIG. 4 is a schematic diagram of the structure of an endophytic deterministic UPF of the implementation method of the 5G endophytic deterministic plant network of the present invention;

FIG. 5 is a schematic diagram of the micro-slice layering method of the implementation method of the 5G endophytic deterministic plant network of the present invention;

FIG. 6 is a block diagram of a plant-network endophytic deterministic base station of the method of implementation of the 5G endophytic deterministic plant network of the present invention;

fig. 7 is a schematic structural diagram of a deterministic base station for a plant network in a method for implementing a deterministic plant network for 5G in accordance with the present invention.

Detailed Description

Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.

In the description of the present invention, it should be understood that the terms "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present invention and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

In the description of the present invention, unless otherwise specified and defined, it should be noted that the terms "mounted," "connected," and "coupled" are to be construed broadly, and may be, for example, mechanical or electrical, or may be in communication with each other between two elements, directly or indirectly through intermediaries, as would be understood by those skilled in the art, in view of the specific meaning of the terms described above.

The invention discloses a realization method of a 5G endogenous deterministic workshop network, which is based on an open architecture of a white box base station and a UPF, and utilizes a rich networking framework provided by the 5G network to realize workshop-level deterministic wireless data transmission, as shown in figure 1, and comprises the following steps:

as shown in fig. 2, based on the local lightweight 5G core network, an access and mobility management function AMF (Access and Mobility Management Function ), a session management function SMF (Session Management Function, session management function), a unified data management function UDM (Unified Data Management, unified data management function), a policy control function PCF (Policy Control Function ) network elements are locally reconfigured at the full connection factory;

adopting a white box technology or adopting a non-white box technology, carrying out deterministic data processing on the basis of a central unit CU of an Open RAN (Open wireless access network) separated architecture, and constructing a workshop network endophytic deterministic base station;

based on the switching pattern of the white-box user plane function UPF, an endogenous deterministic UPF is constructed (User Plane Function ).

The 5G core network separates the control plane from the user plane, and each network function (NF network element) based on the service architecture is mutually independent, so that the newly added and updated network elements can not influence other network elements, and the network element sinking park is also conveniently realized.

In a preferred scheme of the invention, the method for locally reconstructing AMF, SMF, UDM, PCF network elements in the fully-connected factory comprises the following steps:

the AMF is used as an access and mobility management center of a local 5G network, provides a session management message transmission channel for the terminal and the SMF, provides authentication and authentication functions for user access, and is a control plane access point of the terminal and the wireless network. The AMF is connected with the base station through an N2 interface, is connected with the SMF through an N11 interface, is connected with the PCF through an N15 interface, and is connected with a NSSF network element with a network slice selection function through an N22 interface; because the AMF has a connection relation with the core nodes related to certainty, such as a base station (RAN), NSSF for controlling network slices and UPF connection through SMF, the endogenous certainty strategy of the workshop network of PCF is issued to the AMF, the AMF is issued to the corresponding base station through an N2 interface, and the AMF is issued to the UPF through an N4 interface, and the UPF creates corresponding PDU session according to different certainty requirements of the terminal, thereby meeting the certainty data transmission requirements of the terminal.

The SMF is responsible for handling user traffic related tunnel maintenance, IP address allocation and management, UP function selection, policy enforcement and control in QoS, charging data collection, roaming, etc. The SMF is connected with the UPF through an N4 interface, and controls the UPF and configures the flow and the orientation of the UPF; the SMF examines deterministic terminal requests and endogenous deterministic subscription data in the UDM, PDU session is endogenous deterministic, and deterministic QoS information for subscription, and associated deterministic charging attributes, determines the unique session ID for the PDU, and the maximum data rate for the terminal. The terminal initiates a request for establishing a deterministic PDU session, and the specific process is as follows:

UPF controls NW-TT to complete switching and transfer to deterministic forward and reverse links;

finally, a deterministic connection is generated: terminal (calling and called) RAN < - > UPF < - > NW-TT.

The control of the UPF by the SMF is realized through an N4 session management flow. The UPF is a data forwarding node of the endogenous deterministic connection, the deterministic link is initiated by the SMF, and establishment and release of the deterministic link corresponding to the PDU session are completed through the N4 session control UPF. The specific implementation method is as follows:

the SMF receives the trigger to establish an endophytic deterministic PDU session;

SMF initiates an N4 session establishment request message to UPF, wherein the message comprises control information for establishing endogenous deterministic forwarding;

the UPF responds to the response message of the initiated N4 session request, and the message includes information, such as charging information, about the deterministic link returned to the SMF after the UPF receives the control message.

the SMF acquires an endogenous deterministic policy rule from the PCF after receiving the request (configured according to the specific content set in the PCF by the scene, namely according to the specific application scene); the deterministic session is realized through QoS management, and because the PCF contains QoS control strategies, the PCF adds the endogenous deterministic service flow support based on user subscription, distributes corresponding deterministic QoS strategies for users/services with different grades, and generates corresponding endogenous deterministic session management strategy control. In addition, by means of an endogenous deterministic traffic detection strategy, the state of the deterministic traffic, such as start and end, is detected, reported to the PCF, and charging information of the deterministic traffic is generated.

The network data analysis function NWDAF (Network Data Analytics Function, which is a network element in the 5G core network that specifically collects and analyzes data) provides load layer data to the PCF at the shop network deterministic slice, the PCF collects network state information of the shop network deterministic slice directly from the NWDAF, provides the PCF with policy decisions, and provides other parts of the deterministic management plane to use the data. The UDM is in butt joint with an operation platform of an operator, so that unified user management of the platform is realized.

In a preferred scheme of the invention, in order to ensure the service quality of deterministic traffic, resource reservation is needed in each network node, and reserved resource traffic is needed to be shaped and filtered, so that traffic exceeding reservation is prevented from entering the network, and other normal traffic is prevented from being influenced. Therefore, the endogeneous deterministic resource management unit carries out corresponding configuration on the resources on the deterministic network node through deterministic expansion signaling according to the resource reservation and planning result. The method for customizing and expanding the deterministic signaling according to the requirements of the deterministic workshop network comprises the following steps:

the terminal sends a protocol data unit PDU session establishment request to the AMF, wherein the request comprises a deterministic transmission requirement;

AMF sends Nsmf_PDUSion_ CreateSMContext Request session creation context request instruction to SMF to request PDU session establishment, and the message includes the deterministic transmission requirement of the session;

the SMF replies Nsmf_PDUSion_ CreateSMContext Response to the AMF, and indicates a session establishment result, if the session establishment is successful, ID information of a session context is returned to the AMF, and if the session establishment is failed, a rejection reason is returned;

the SMF sends a Namf_communication_N1N2MessageTransfercommunication message sending instruction to the AMF, wherein the instruction carries N1 Container and N2 Container; n1 Container is a session establishment result sent to the terminal by SMF, including a deterministic transmission resource reservation result; n2 Container is a resource establishment request sent to gNB by SMF, wherein the request comprises radio resource reserved by base station for the session;

AMF sends Namf_communication_N1N2MessageTransferresponse message to SMF;

the AMF sends N2 PDU Session Request (PDU session request message including definitive tunnel endpoint information on the UPF side) to the gNB (NR logical node) and carries PDU Session Establishment Accept (session establishment accept message) including radio resources that require the base station to reserve for the current session;

AMF sends Nsmf_PDUSion_ UpdateSMContext Request (PDU session update context request instruction) to SMF, carrying base station side deterministic resource reservation and tunnel endpoint information;

the SMF initiates N4 Session Modification Request (message modification request instruction) to the UPF and carries downlink determination of the reservation of the downlink resources and tunnel information;

the UPF sends N4 Session Modification Reponse (session modification response instruction) to the SMF;

In a preferred scheme of the invention, the method for constructing the workshop network endogenous deterministic management plane based on the 5G signaling network comprises the following steps:

In a preferred scheme of the invention, the method for carrying out the endogenous deterministic transmission comprises the following steps:

In a preferred embodiment of the present invention, as shown in fig. 5, the specific method of layering the micro slices is as follows:

The time delay of the data transmission of the micro-slices of different layers is different, the micro-slices meeting the deterministic requirement are divided for different production areas on the 5G network through the slicing technology, and each micro-slice is provided with independent network wireless resources, transmission resources and UPF for completing endophytic deterministic routing and switching, so that the deterministic data transmission from UE (terminal) to UE on the production site is realized.

More preferably, the network slice is identified by a single network slice selection assistance information S-nsai (Single Network Slice Selection Assistance Information ), and the deterministic terminal signs one or more S-nsais on UDM (Unified Data Management), so as to implement signing one or more hierarchical deterministic slices;

In a preferred embodiment of the present invention, as shown in fig. 6 and fig. 7, the method for constructing the intra-plant network deterministic base station is as follows:

the 3GPP classifies wireless base stations into 4 classes: macro base station, micro base station, pico base station and femto base station. Wherein the micro base station, pico base station and femto base station are collectively called a small base station. Because the 5G works in a high frequency band, the signal range which can be covered by the macro base station is limited, and the workshop network mainly covers a production field with a specific range, the endogenous deterministic workshop network base station of the embodiment is realized by adopting a small base station mode.

The Ethernet interface between CU (central unit) and distribution unit DU is upgraded to TSN interface, the intermediate transmission link between CU and a plurality of DUs is realized by TSN (Time-Sensitive Networking, time sensitive network) switch, and the TSN protocol is used as core to realize the deterministic transmission of 5G workshop network;

time synchronization is a precondition for deterministic transmission. 802.1AS defines a method for TSN network synchronization, which synchronizes all time slaves in the network with the time of the time master. The CU disposes the local deterministic master clock, CU controls DU to carry deterministic clock information in broadcasting or specialized signaling, UE obtains the clock information after synchronizing with base station, calculate the compensation value with deterministic clock message through gPTP (general precision time protocol);

and the master clock of the deterministic network is deployed in the CU, the accurate synchronization of the user terminal UE and the master clock is realized through the base station broadcast clock, and the accurate synchronization of the clocks of the UPF and the TSN switch connected with the UPF is realized through the tunnel broadcast clock to the UPF.

deterministic management in CUs mainly manages deterministic network interface adapters for the intermediate links of CUs to DUs and reservation of resources on the intermediate end-to-end path, and reservation of radio resources by DUs according to deterministic traffic. And the deterministic management carries out corresponding configuration on the resources on the switch and the network interface adapter according to the offline resource reservation and planning result, and simultaneously carries out configuration on the wireless resources of the DU.

RU: a radio unit responsible for handling DFE (decision feedback equalizer) and part of PHY (port physical layer) layer functions.

DU: distributed units near the RU handle mainly RLC, MAC and part of PHY layer functions, controlled by the CU.

CU: a central unit responsible for handling higher layer protocols. A deterministic gNB (NR logical node) consists of a CU and a DU, connected by deterministic links. A CU with multiple DUs may support multiple deterministic gnbs. The split architecture enables deterministic plant networks to manage multiple DUs centrally through the intermediate transmission interface, according to intermediate transmission deterministic links and network designs.

In a preferred scheme of the present invention, as shown in fig. 3 and fig. 4, the method for constructing the endogenous deterministic UPF is implemented based on the switch mode of the white-box UPF, and the method comprises:

the endogenous deterministic UPFs are deployed in different deterministic layering slices, and the UPFs of different deterministic layering are connected through a time sensitive network TSN switch to realize the endogenous forwarding of the UPFs and the deterministic exchange among different UPFs;

and the coupling management of the deterministic UPF receives the management signaling of the local 5GC through an N4 interface, and reserves UPF management functions of session management, tunnel management, flow charging and access control of the UPF. The deterministic port of the central unit of the base station transmits the uplink deterministic traffic to the TSN exchanger through the tunnel, the TSN exchanger exchanges to the downlink tunnel of the UPF, and then returns to the base station to perform the endogenous forwarding of the UPF and the deterministic exchange between different UPFs.

The routing function of the UPF is transmitted to the UPF by a base station (5G-RAN) through a tunnel, the UPF directly forwards the uplink flow to a TSN switch, the TSN switch completes the exchange of deterministic flow, and then returns to the downlink tunnel of the UPF to be transmitted to a terminal through the base station, thus completing the transmission of local endogenous deterministic flow.

The invention also provides a system for realizing the 5G endophytic deterministic workshop network based on the method, which comprises a workshop network endophytic deterministic management surface, a layered micro-slicing module, a workshop network endophytic deterministic base station and an endophytic deterministic UPF.

The workshop network endogenous deterministic management surface is connected with the layered micro-slicing module, the layered micro-slicing module is respectively and electrically connected with the deterministic terminal and the endogenous deterministic UPF, and the endogenous deterministic UPF is electrically connected with the workshop network endogenous deterministic base station.

The technical scheme aims at the problems caused by the development of deterministic data wireless transmission in the traditional 'campus network' mode, combines the openness and function expansion capability caused by 5G local white-box, utilizes the abundant networking frameworks provided by the 5G network, and aims at the requirements of different workshops, and the customized 'deterministic workshop network' is realized by taking the workshops as units. The local deterministic service of the fully-connected factory can be realized with low investment, and the differential requirements of different workshops on deterministic transmission can be met.

Meanwhile, the white box can flexibly adapt to the development of 5G deterministic standards, saves investment of operators, has good function expansion capability, and has positive significance for promoting the development of 5G deterministic networks and fully-connected factories.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. The implementation method of the 5G endogenous deterministic workshop network is characterized by comprising the following steps of:

2. The method for implementing a 5G endogenous deterministic plant network according to claim 1, wherein the method for customizing and expanding deterministic signaling according to the requirements of the deterministic plant network comprises:

AMF sends session creation context request instruction to SMF

Nsmf_pduse_ CreateSMContext Request, requesting to establish a PDU session, including the deterministic transmission requirements of the session;

SMF replies to AMF with a session return context request instruction

Nsmf_pduse_ CreateSMContext Response indicates the session establishment result, if the establishment is successful, the ID information of the session context is returned to the AMF, and if the session establishment fails, the rejection reason is returned;

AMF sends response message to SMF for Namf_communication_N1N2MessageTransfere;

the AMF sends PDU session request message N2 PDU Session Request to the gNB and carries session establishment acceptance message PDU Session Establ ishment Accept, which contains wireless resource requiring the base station to reserve for the session;

AMF sends PDU session update context request instruction to SMF

Nsmf_pduse_ UpdateSMContext Request carries deterministic resource reservation and tunnel endpoint information of the base station side;

SMF initiates an N4 message modification request instruction N4 Session Modification Request to UPF, carrying downlink determination of the reservation of the downlink resources and tunnel information;

the UPF sends an N4 session modification response instruction N4 Session Modification Reponse to the SMF;

3. The method for implementing a 5G endophytic deterministic plant network according to claim 2, wherein the method for locally reconstructing AMF, SMF, UDM, PCF network elements at a fully connected plant comprises:

4. The method for implementing the 5G endophytic deterministic workshop network according to claim 1, wherein the method for constructing the workshop network endophytic deterministic management plane based on the 5G signaling network is as follows:

5. The method for implementing a 5G endophytic deterministic plant network according to claim 1, wherein the method for performing endophytic deterministic transmission is as follows:

6. The method for realizing the 5G endogenous deterministic plant network according to claim 1, wherein the specific method for layering the micro slices is as follows:

7. The method for implementing the 5G endogenous deterministic plant network according to claim 6, wherein the network slice employs a single network slice selection assistance information S-nsai identification, and the deterministic terminal signs one or more S-nsais on the UDM to implement signs one or more hierarchical deterministic slices;

8. The method for implementing a 5G endophytic deterministic vehicle to vehicle network of claim 1, wherein the method for constructing the endophytic deterministic base station of the vehicle to vehicle network is as follows:

9. The method for implementing a 5G endophytic deterministic plant network according to claim 1, wherein the method for constructing an endophytic deterministic UPF is as follows:

10. A system for implementing a 5G endophytic deterministic plant network based on the method of one of claims 1 to 9, characterized by comprising a plant network endophytic deterministic management plane, a hierarchical micro-slicing module, a plant network endophytic deterministic base station and an endophytic deterministic UPF;