CN118018382B

CN118018382B - Collaborative management method for distributed deterministic controllers in large-scale wide-area open network

Info

Publication number: CN118018382B
Application number: CN202410420787.0A
Authority: CN
Inventors: 吴强; 曹胜男; 王然; 郭梦杰; 宋宇轩; 刘青俊
Original assignee: Nanjing University of Aeronautics and Astronautics
Current assignee: Nanjing University of Aeronautics and Astronautics
Priority date: 2024-04-09
Filing date: 2024-04-09
Publication date: 2024-06-21
Anticipated expiration: 2044-04-09
Also published as: CN118018382A

Abstract

The invention relates to a collaborative management method of a distributed deterministic controller in a large-scale wide area open network, which comprises a deterministic service manager, a distributed Det-AS controller and a Det-AS three-layer network architecture. The network architecture divides the large-scale wide area open network into a plurality of Det-AS according to the division rules such AS network requirements and the like, and configures a distributed Det-AS controller. The Det-AS controller includes three functional modes of intra-domain control, inter-domain interaction, and end-to-end control. Based on the distributed Det-AS controller, through the open interface of each functional entity, a deterministic service flow information collection method is designed, and when deterministic service flows are communicated, the Det-AS controller performs switching of each functional mode and cooperative interaction among the Det-AS controllers. The method improves the service information collection capacity and the load balancing capacity of the open large-scale wide area deterministic network, and realizes the end-to-end low-delay data forwarding of the large-scale wide area deterministic network.

Description

Collaborative management method for distributed deterministic controllers in large-scale wide-area open network

Technical Field

The invention relates to a collaboration and management method of a distributed deterministic controller in a large-scale wide-area open network, in particular to a design of a deterministic controller with a multifunctional mode, belonging to the technical fields of Internet protocols and Internet.

Background

With the explosive development and update iterations of emerging technologies, the demand for real-time traffic by emerging network systems is increasing, for example, requiring ultra-low latency and ultra-high reliability network transport services. Time-sensitive networks (Time-SENSITIVE NETWORKING, TSNs) have received a great deal of attention from various industries. The TSN is an extension of the ethernet network, providing deterministic low latency transport services for two-layer networks. In recent years, with the continuous evolution of network technology standards, deterministic networks (DeterministicNetworking, detNet) have become a hotspot of widespread interest in academia and industry, aiming at solving the problem of implementing the determination of transmission paths on second-layer bridging and third-layer routing segments, thereby providing extremely low packet loss rate and determined end-to-end transmission delay for specific real-time applications. However, with the push of emerging deterministic network requirements and industry internet, the application scope of existing deterministic networks is gradually beyond the scope of local area networks and extends the application scope to large-scale wide area open networks. Thus, how to design an efficient network control and management scheme to accommodate current large-scale wide-area deterministic networks remains one of the future challenges.

Currently, the standards for TSN are basically mature with respect to the technical standards of the data plane, and the relevant standards for DetNet are still under formulation. Furthermore, the relevant technical standards for TSNs and DetNet in the control plane are also under improvement. The network configuration and management functions play a very important role in the running process of the control plane, and are particularly in the aspects of network deployment, route management, traffic scheduling, configuration efficiency and the like. Therefore, an efficient configuration and management scheme is critical to the operational efficiency and reliability of the overall network.

The IEEE TSN task group formulates an 802.1Qcc standard aimed at controlling and managing the TSN network, which introduces three control and management models, including fully distributed users and networks, centralized networks and distributed users, fully centralized networks and users, to configure network resources for time-sensitive applications, ensuring that the network can meet its bounded latency requirements. It should be noted, however, that the above-described solution is mainly applicable to network scenarios with small scale, e.g. in factories and campus networks. For large-scale networks and wide area networks, due to network characteristics such as long-distance link transmission, the signaling round trip time between the terminal device sending the traffic flow and the controller is large, which cannot provide meaningful support for time-sensitive traffic flows. In addition, centralized controllers are also faced with single point failure and excessive load.

The IETF DETNET working group developed a draft of the network management model with respect to the DetNet control plane, which extended on the basis of the 802.1Qcc control and management model and provided a preliminary specification of the network architecture. However, in large-scale wide-area deterministic networks, network control and management schemes are still in the formulation phase, and the proposed schemes are obviously no longer applicable. Particularly, when considering network quality factors such as bandwidth, delay and the like in a large-scale wide area deterministic network, challenges such as difficult acquisition of a network global state, complex network configuration, difficult calculation and the like can be faced if a centralized network and a user configuration scheme are adopted.

Aiming at the problems of difficult acquisition of global information, single computing node, overlarge load and the like faced by a large-scale wide area deterministic network, the scheme does not improve the existing network in a targeted way, and mainly has the following problems:

1. In the original scheme under the local closed scene, the control plane can master the information such as global network topology information, service load and the like, and performs end-to-end route calculation and service flow scheduling in a centralized control and management mode. However, in a large-scale wide-area open scene, the global information is difficult to grasp in a centralized manner, which makes the original scheme no longer applicable to the large-scale wide-area open scene. In addition, for the end-to-end route management and traffic scheduling requirements in the wide area deterministic network, a network function entity for control and management needs to be designed to collect global network topology information, traffic load and other information in the related traffic flow communication process, but the existing scheme does not provide an explicit solution for the requirements.

2. Aiming at the problems of wide network coverage, huge service scale, huge service load and the like in a large-scale wide area open scene, the traditional single centralized control node is difficult to perform end-to-end route management and service flow scheduling. Meanwhile, considering that a large-scale wide area deterministic network puts forward clear practical demands on service load balancing, no scheme is available for effectively solving the problem. In view of the fact that conventional centralized control methods are no longer applicable, it is necessary to explore and study how to implement the coordination and management of distributed deterministic controllers. However, no solution support is currently seen for the coordination and management of distributed deterministic controllers in large-scale wide-area deterministic networks. Therefore, a new solution is urgently needed to solve the above technical problems.

Disclosure of Invention

The invention aims at the problems existing in the prior art, and provides a collaboration and management method of a distributed deterministic controller in a large-scale wide-area open network, which mainly solves the following problems: acquiring global network state information such as service load and the like in a large-scale wide-area open scene; coping with the load balancing requirement of the large-scale wide area deterministic network; the problems of overlarge load, single calculation node and the like caused by a centralized controller are solved; in addition, control and management of end-to-end low-delay data forwarding in the large-scale wide area deterministic network are realized.

In order to achieve the above object, the technical scheme of the present invention is as follows, a method for collaborative management of distributed deterministic controllers in a large-scale wide area open network, the method comprising the steps of:

Step 1: dividing an original open large-scale wide area deterministic network into a plurality of Det-AS according to dividing rules such AS network requirements, and configuring each Det-AS controller and function distribution thereof for service flows of different user terminals accessed to the Det-AS;

Step 2: through the open interface of each functional entity in the large-scale wide area deterministic network architecture, the communication process of deterministic service flow is realized, and when a terminal user initiates deterministic service flow, the related information of the service flow is transmitted to network equipment through the open interface so as to be further processed;

step 3: when communication of deterministic traffic flow is initiated, a distributed deterministic autonomous domain controller information collection method is provided, and only information such AS network state in a Det-AS (Det-AS) related to the initiated traffic flow is collected, so that network computing efficiency is improved;

Step 4: when the deterministic service flow communication is carried out, the distributed deterministic autonomous domain controller carries out the function mode switching of each Det-AS controller according to the service flow information, the network state, the network requirement and other information so AS to dynamically adjust to optimize the network performance;

Step 5: further, the Det-AS controllers cooperatively interact, and the information of each Det-AS controller is transmitted through reconfiguration and path planning so AS to calculate the end-to-end data forwarding delay, thereby optimizing the data forwarding delay of deterministic service flow.

The method can realize the collection of information such as global network state and the like in a large-scale wide area deterministic network, the cross-domain end-to-end low-delay data forwarding and the like, effectively avoids and reduces delay and jitter caused by network centralized control, and ensures that the network has the capability of adapting to load balancing requirements in emerging application scenes.

Wherein, step 1 is specifically as follows:

Step 101: firstly, dividing a large-scale wide area deterministic network into a plurality of Det-AS (Det-AS) which are deterministic autonomous domains (DETERMINISTIC AUTONOMOUS SYSTEM, det-AS) according to a certain rule so AS to carry out domain division management, wherein each Det-AS comprises a plurality of Router devices and terminal devices, each Router device comprises a forwarding Router (ForwardingRouter, FR) and a boundary Router (ER), the ER is used for realizing cross-domain data forwarding, and the FR is used for intra-domain data forwarding;

Step 102: and then, determining the source Det-AS, the destination Det-AS and the relay Det-AS according to deterministic service flows initiated by different user terminals. For different Det-AS, each Det-AS controller executes different functions through the C1 interface, AS shown in fig. 2, taking two different types of service flows AS examples, which correspond to two different receiving end users, and are respectively that the terminal 1 sends service flows f1, f2 to the terminal 2 and the terminal 3;

Step 103: further, control and management of each Det-AS are performed by a Det-AS controller, and according to different Det-AS corresponding to the access terminal, the Det-AS controller will perform different functional modes, and the source Det-AS and the relay Det-AS generally adopt functions of intra-domain control and inter-domain interaction, and the destination Det-AS needs to have functions of end-to-end control in addition to the above two functions. For example, for a traffic flow f1 initiated by an end user, a controller accessing the Det-AS2 will provide it with an end-to-end secondary routing computing platform, and for the traffic flow f2, the Det-AS3 controller will perform functions of intra-domain control, inter-domain interaction and end-to-end control;

Step 104: finally, according to the function distribution of the deterministic controller, the intra-domain control function is responsible for collecting network state information in the domain and executing a routing calculation task in the domain; the inter-domain interaction function is responsible for forwarding inter-domain information; the end-to-end control function is responsible for collecting global network state information in the communication process of related service flows and executing end-to-end route calculation so as to ensure end-to-end data forwarding.

In a distributed large-scale wide area network, different Det-AS controllers can perform computation of any end-to-end data forwarding delay and the like. Therefore, the function distribution of the deterministic controller can realize the problems of load balancing in a large-scale open network and the like. Meanwhile, the controller resource waste can be avoided, and the end-to-end time delay calculation efficiency can be effectively improved. This provision of a flexible and intelligent multi-function mode controller helps to better manage the different types of traffic flows in the network. The distributed control and management scheme can solve the management and routing problems of a large-scale network and improve network performance and computing efficiency.

Wherein, step 2 is specifically as follows:

Step 201: the terminal user initiates a deterministic service request to a deterministic service manager through an application programming interface protocol, and the deterministic service manager collects service requirements of different terminal users initiating communication so as to configure deterministic characteristics of the terminal users;

Step 202: the deterministic service manager transmits the collected deterministic service demands to each Det-AS controller through a user network information protocol configured by an N1 interface so AS to meet the acquisition of different terminal service demands, wherein the functional modes of the Det-AS controller comprise intra-domain control, inter-domain interaction and end-to-end control;

Step 203: after collecting service demands, each Det-AS controller carries out network topology discovery in the Det-AS, each Det-AS uploads network state information in a domain to each domain controller through a network management protocol of a C1 interface, and then each domain controller executes a domain control function to carry out initial domain routing calculation and scheduling management on the collected service demands and the network state information in the domain;

step 204: the controller in each domain issues a routing and scheduling strategy in the Det-AS to each corresponding Det-AS to configure a domain deterministic network, so AS to guide network equipment in the domain to route and schedule deterministic traffic flows according to a certain rule;

Step 205: each Det-AS controller obtains network state, route and time delay result information of each domain according to intra-domain control operation so AS to control and manage each Det-AS, each Det-AS controller executes inter-domain interaction function through a C2 interface protocol, and forwards cross-domain information and interacts message content of other Det-AS controllers and service load information of the domain;

Step 206: and the Det-AS controllers gather the obtained delay network information to the Det-AS controller with an end-to-end control function, and the end-to-end controller performs end-to-end data forwarding delay calculation according to the collected relevant Det-AS internal information. In order to meet the deterministic service requirement of a specific user terminal and realize the optimal data forwarding delay, an end-to-end controller cooperates with each intra-domain controller and an inter-domain interaction controller to make an optimal strategy of the end-to-end data forwarding delay;

Step 207: through coordination and interaction of the Det-AS controllers, each Det-AS controller carries out real-time self-adaptive adjustment on the intra-domain network according to allocation of the end-to-end controllers, and issues intra-domain network reconfiguration and intra-domain service flow forwarding path tasks to the Det-AS;

step 208: each Det-AS controller reports the result of the reconfiguration and planning of the service flow in the respective domain to the corresponding end-to-end controller through the inter-domain interaction controller, and the end-to-end controller carries out the end-to-end optimal data forwarding delay calculation of the large-scale wide area deterministic network again according to the reported configuration information;

step 209: according to the cooperative operation of each Det-AS controller, the Det-AS controller with the end-to-end control function feeds back the information such AS the calculated end-to-end optimal data forwarding delay and the like to a deterministic service manager, and the deterministic service manager performs corresponding configuration and management operation on the user terminal;

Step 210: according to the configuration result of the deterministic service manager, the deployment of the deterministic network characteristics of the user terminal equipment is realized, and after all configuration and deployment operations are completed, the user terminal equipment starts to transmit deterministic service flows;

Step 211: when deterministic traffic flows are started to be transmitted, each Det-AS controller needs to monitor the network state in each Det-AS, wherein each Det-AS controller needs to discover newly initiated traffic flows or network fault conditions in a deterministic network in real time so AS to reconfigure the network in each Det-AS according to network state information and traffic flow requirements;

Step 212: if the network state in a certain domain changes, each Det-AS controller needs to make corresponding configuration update aiming at the current network situation, the Det-AS controller executes the domain control function, performs the domain routing calculation and management operation, updates the configuration of the deterministic network in the domain, reports the routing, the time delay calculation result and the fault recovery condition to the end-to-end controller through the inter-domain interaction controller, and repeatedly executes the configuration and the cooperative operation of the Det-AS controller until the configuration and the deployment of the user terminal are realized.

The steps together form a deterministic service flow initiating process, so that each deterministic service flow can meet the user requirements in a large-scale wide-area deterministic network, and the optimal deterministic network performance can be realized. This process encompasses coordination and configuration at different levels to ensure efficient operation of the network.

Wherein, the information collection process in the step 3 is specifically as follows,

According to deterministic service flows initiated by different terminals, each Det-AS controller firstly executes a domain control function, collects network state information such AS node states, link states and domain time delays in the domain to the Det-AS controller, then performs mutual collaboration and cross-domain forwarding through inter-domain interaction functions of the Det-AS controller, and gathers the network state information of each Det-AS to an end-to-end controller to which a destination Det-AS belongs.

Compared with the traditional centralized control method, the control and management scheme of the distributed deterministic controller provided by the invention has the advantages that the scale of information collection is obviously reduced, and the size of information collection of the end-to-end controller of the Det-AS is positively related to the service scale of the related Det-AS. Compared with the traditional method, the method only needs to collect the global network state information, service load and other information of the Det-AS related to the current service flow communication, and does not need to collect the information of the whole network to the same centralized control node for calculation and processing, thereby avoiding the problems of network failure, single calculation node and the like possibly caused by overlarge service load and greatly reducing the network load of the Det-AS controller. Meanwhile, the interaction scale between the Det-AS controllers is also greatly reduced, all Det-AS controllers of the whole network do not need to be traversed, and only cross-domain information interaction and coordination between the Det-AS controllers and the Det-AS controllers related to the service flow are needed, so that the waste of controller resources and the increase of traversing complexity are avoided. Compared with the traditional centralized control method, the control and management scheme of the distributed deterministic controller has the advantages of obvious information scale reduction, load balancing, effective resource utilization and the like.

The detailed steps of the Det-AS controller function mode switching in step 4 are AS follows:

Step 401: referring to fig. 6, for a service flow f1, a transmitting end is connected with a Det-AS1, the service flow f1 is transmitted from the Det-AS1 to the Det-AS5 for receiving, firstly, a Det-AS1 controller transmits the requirement of the deterministic service flow f1 collected by a deterministic service manager to the Det-AS1 controller through an N1 interface;

Step 402: the Det-AS1 controller executes a domain control function, and the function is mainly responsible for collecting node information, link information and network state information in the Det-AS, and applying the node information, the link information and the network state information to corresponding domain network equipment for domain network management and route calculation according to the information and control and management strategies selected by the controller so AS to meet the requirements of service flows;

Step 403: after routing calculation and service flow management operations are issued through a C1 interface through the intra-domain control function of the Det-AS1 controller, the deterministic service flow in the Det-AS1 carries out data forwarding in the Det-AS and uploads the calculation result in the Det-AS to the Det-AS1 controller, so that the service flow is ensured to be transmitted in the Det-AS through a data forwarding path with lower time delay;

Step 404: according to the data forwarding in the Det-AS1, the service flow f1 is forwarded to the border router, and a connection relationship is established between the border router and the next Det-AS. Meanwhile, after the service flow f1 enters the next Det-AS, the controller of the Det-AS executes the intra-domain control operation, AS shown in fig. 6, there are two modes of cross-domain forwarding of the service flow f1, denoted by f1.1 and f1.2, respectively, f1.1 represents one of the cross-domain forwarding paths, the service flow f1 is forwarded from the Det-AS1 to the Det-AS5, and f1.2 represents that the service flow f1 is forwarded from the Det-AS1 to the Det-AS2 and then is forwarded from the Det-AS2 to the Det-AS5;

step 405: the controllers of the Det-AS related to the Det-AS1 obtain network state information such AS data forwarding delay, service load and the like in each domain according to route calculation and flow management in the domains, and the Det-AS controllers make a more global decision by executing an inter-domain interaction function and forward the information to the Det-AS5 controllers in a cross-domain manner through a C2 interface;

Step 406: when the related Det-AS controller of the service flow f1 collects information in each domain to the Det-AS5 controller by executing the inter-domain interaction function, the Det-AS5 controller provides an end-to-end data forwarding computing platform for the collected information, adjusts the global routing setting thereof by executing the end-to-end control function so AS to perform end-to-end secondary routing, thereby ensuring that the service flow meets the requirements of specific terminal users, and realizing the computation of end-to-end optimal deterministic service flow forwarding delay and the like;

Step 407: the end-to-end controllers coordinate other Det-AS controllers to enable the Det-AS controllers to respond to the adjustment of the end-to-end controllers and the change of network dynamics in real time and update the network configuration in the Det-AS in real time so AS to adapt to various network emergency conditions, such AS the allocation of the Det-AS controllers, network faults, service demand change and the like, thereby obtaining the end-to-end optimal data forwarding delay and the like of the service flow f 1;

Step 408: finally, the end-to-end data forwarding of the deterministic service flow f2 is also carried out by matching the relevant Det-AS controllers in the steps, so that the optimal end-to-end service flow forwarding path of the service flow f2 is obtained, and corresponding data forwarding delay is obtained, thereby meeting the requirement of distributed deterministic communication in an open large-scale wide-area deterministic network, AS shown in fig. 6, the service flow f2 is forwarded from the Det-AS4 to the Det-AS3, the cross-domain forwarding of the service flow is also in two ways, which are respectively represented by f2.1 and f2.2, and in the process of forwarding the service flow, the Det-AS3 controller has an end-to-end control function, so that the switching of the functional modes of the Det-AS controller provided by the invention can effectively realize the load balancing of the large-scale wide-area deterministic network.

The cooperative interaction process between the Det-AS controllers in the step 5 is specifically AS follows:

Firstly, each relevant Det-AS controller in a large-scale wide area deterministic network control plane executes a domain control function through a C1 interface, collects network state information, routing information, time delay calculation results and other information in each domain in a data plane, the process is an important link in a distributed deterministic controller control and management scheme, ensures that an end-to-end controller can acquire detailed information from the relevant Det-AS,

Secondly, each Det-AS controller executes an inter-domain interaction function, carries out cross-domain forwarding on the collected time delay, service load and network state information of the relevant Det-AS, and transmits the information to the adjacent Det-AS controllers until the information such AS the network state of the intra-domain controller of the relevant Det-AS is completely transmitted to the Det-AS controller corresponding to the receiving end.

Further, according to the deterministic service requirements of the specific terminal user obtained from the deterministic service manager, the Det-AS controller to which the receiving end belongs performs end-to-end control function, and performs end-to-end routing and scheduling and other calculations initiated by the service flow, so AS to obtain the optimal data forwarding delay of the open large-scale wide area deterministic network. This critical decision process of the Det-AS controller ensures that the large-scale wide area deterministic network can meet the traffic demands of specific user terminals and achieve the best performance of the deterministic network.

And finally, after the end-to-end controller collects and gathers relevant Det-AS controller information initiated by the service, the end-to-end controller coordinates other Det-AS controllers to perform reconfiguration and planning operations of the Det-AS, and issues configuration to the data forwarding plane. Further, the end-to-end controller finally selects the optimal route forwarding path to ensure that the open large-scale wide area deterministic network can realize low-delay data forwarding.

This procedure demonstrates how the Det-AS controller communicates information, decisions, and coordinates in a distributed large-scale wide-area deterministic network environment to meet the requirements of deterministic traffic flows while optimizing network performance. This is a key step in ensuring that an open large-scale wide-area deterministic network can meet various business requirements.

A collaborative management system of distributed deterministic controllers in a large-scale wide-area open network controls and manages the large-scale wide-area deterministic network by adopting a collaborative and management scheme of the distributed deterministic controllers, which is divided into three layers, wherein the first layer represents deterministic service manager of heterogeneous service, the second layer represents functional distribution of each Det-AS controller, and the third layer represents domain topology of the large-scale wide-area deterministic network.

The collaboration and management system

The system comprises a deterministic service manager, a deterministic autonomous domain controller and a plurality of deterministic autonomous domains, wherein a plurality of user terminals are connected into the same Det-AS, and the user terminals comprise heterogeneous services of various types, such AS intelligent factories, automatic driving and the like. Control and management of each Det-AS is performed by a Det-AS controller;

The system comprises a source Det-AS, a relay Det-AS and a destination Det-AS, wherein each Det-AS consists of a plurality of routers and terminal equipment, the router equipment comprises a forwarding router and a boundary router which are respectively used for realizing intra-domain data forwarding and cross-domain data forwarding of deterministic service flows, the source Det-AS refers to a domain of a sending end equipment, the destination Det-AS refers to a domain of a receiving end equipment, the relay Det-AS refers to all Det-AS except the sending end and the receiving end equipment, and the split domain control and management of the open large-scale wide area deterministic network are realized by setting the Det-AS, so that the computational complexity is reduced and the manageability of the network is improved;

The invention provides a multi-functional mode controller which is beneficial to managing and scheduling the whole open large-scale wide area deterministic network. The intra-domain control is used for route calculation and network management in each Det-AS, the inter-domain interaction is used for information transmission and sharing among the Det-AS controllers, the end-to-end control is used for receiving the domain of the end user, a calculation platform is provided for the end-to-end optimal route calculation of the related service flow, and the Det-AS controller with the multifunctional mode is beneficial to realizing the collaborative management of the network. The invention provides a cooperation and management scheme of a distributed deterministic controller in a large-scale wide-area open network, which comprises the steps that firstly, a domain control function is executed through each Det-AS controller to perform routing calculation in the Det-AS; then, summarizing the information such AS intra-domain information and calculation results to the Det-AS controller where the receiving end is located through the inter-domain interaction function of each Det-AS controller; and finally, executing an end-to-end control function by the Det-AS controller where the receiving end is positioned to perform secondary route calculation so AS to obtain the end-to-end global optimal data forwarding delay. Furthermore, each controller of the Det-AS may set the above three functional modes, the switching of which is mainly determined by the originating traffic flow.

The deterministic service manager comprises functions of end user discovery, end user information registration, user demand collection, end user configuration, heterogeneous service flow processing and the like, wherein the registration generally comprises application program ID, service flow ID, transmission period of service flow, service flow size and service quality requirement information of application programs, and meanwhile, the service manager is different from other controllers and mainly aims at carrying out end user configuration, and the functions are prevented from being realized through complex network configuration and network forwarding by hop by arranging the deterministic service manager.

The network architecture controls and manages the large-scale wide-area deterministic network by adopting a cooperative and management scheme of a distributed deterministic controller, and the hierarchical and distributed scheme can improve the manageability and the operation efficiency of the whole open large-scale wide-area deterministic network.

The open interfaces of the functional entities in the collaboration and management system are specifically as follows:

And the deterministic service manager-controller interface N1 is used for transmitting the service requirement acquired from the terminal user to each Det-AS controller of the control plane by the deterministic service manager so AS to ensure that the specific requirement of the terminal user is met, and meanwhile, collecting the routing and time delay network state information in each Det-AS of the control plane for the terminal user to configure and use.

The system comprises a deterministic controller-Det-AS interface C1, wherein each Det-AS uploads information such AS intra-domain network state information and service load to a Det-AS controller responsible for controlling and managing each domain, then each Det-AS controller monitors the network state, route management, service flow scheduling and other operations of each Det-AS in real time by utilizing the network state information, and sends policies such AS routing configuration and the like in the corresponding domain to routing equipment in each domain through the C1 interface so AS to ensure that the intra-Det-AS network equipment can manage and process deterministic service flows according to specific rules, and finally each Det-AS controller obtains the information such AS routing and time delay results in each domain through calculation so AS to maintain and adjust the global network state in the communication process of related service flows, and enables each Det-AS controller to adjust and optimize so AS to meet the constant deterministic service flow demands;

The interface is used for information interaction among different controllers of a control plane, and comprises cooperation among Det-AS controllers, each Det-AS controller executes an intra-domain control function, the collected network state information in each Det-AS carries out initial intra-domain route calculation, the intra-domain calculation result and network congestion information are forwarded to the Det-AS controller with an end-to-end control function in a cross-domain manner through the inter-domain interaction function of each Det-AS controller, at the moment, the Det-AS controller is used AS a global information controller for summarizing the service flow, has the calculation capability of global network information, carries out further end-to-end secondary route calculation and network optimization decision through the interface to obtain the optimal end-to-end data forwarding delay of the service flow,

A terminal interface U1, which interfaces with end users of the respective source/destination Det-AS, is responsible for data transmission between the end users and the Det-AS, and allows end user devices supporting deterministic functions to communicate with the respective source/destination Det-AS via the interface,

A device interface R1 in the Det-AS, which is connected with the network devices in the same Det-AS, is mainly responsible for realizing communication connection between the network devices in each Det-AS in a distributed Det-AS system and allowing the network devices to forward data and share resources in the same Det-AS through the interface,

The device interface R2 between Det-AS is connected with different Det-AS, and is mainly applied to connecting cross-domain network devices between different Det-AS in a large-scale open deterministic network and is beneficial to realizing cross-domain communication and data transmission between different Det-AS.

These interfaces facilitate the transfer of information between the different Det-AS controllers and the functional entities, thereby ensuring efficient collaboration and coordination of the large-scale wide-area deterministic network. Through these interfaces, distributed control of the large-scale wide-area deterministic network can be effectively performed to meet the needs of different end users and provide optimal network performance.

Compared with the prior art, the invention has the following advantages that (1) the invention provides a collaboration and management scheme of a distributed deterministic controller in a large-scale wide area open network, which divides the open large-scale wide area deterministic network into a source Det-AS, a relay Det-AS and a destination Det-AS for distributed processing, is used for realizing load balance of service flows and lower end-to-end data forwarding,

(2) By providing the working process of the open interfaces of the functional entities and the information transferred, and by the cooperation between the interfaces, an efficient collaboration and coordination of the large-scale wide area deterministic network is ensured,

(3) The invention provides a design scheme of a distributed deterministic controller with a multifunctional mode, wherein the functional mode comprises the following steps: intra-domain control, inter-domain interaction and end-to-end control,

(4) The function distribution of the distributed deterministic controller, the intra-domain control function is used for route calculation and network management in the Det-AS, the inter-domain interaction function is used for cross-domain information forwarding and sharing among a plurality of different Det-AS, the end-to-end control is used for receiving the domain of the end user, and providing a calculation platform for the end-to-end optimal route calculation of the related service flow,

(5) By providing an information collection scheme of the deterministic controller, the information collection scale of the deterministic controller in a large-scale wide-area deterministic network is reduced, thereby avoiding the problems of network faults, single computing nodes and the like possibly caused by overlarge traffic load,

(6) The service flow initiates the main flow of communication, including terminal service demand acquisition, network topology discovery, network control and management, user terminal configuration and network monitoring. In network control and management, the cooperative process of the deterministic controllers of each functional mode is mainly embodied,

(7) By switching the correlation of each functional mode of the distributed deterministic controllers, the coordination among the various deterministic controllers and the switching of each functional mode under different conditions can be fully embodied, thereby ensuring the load balance in a large-scale wide-area deterministic network,

(8) Collaborative interaction of each deterministic controller is performed according to operations such as information transfer, reconfiguration, decision and coordination in a distributed large-scale wide-area deterministic network environment so as to meet the requirements of deterministic traffic flows and achieve optimal end-to-end data forwarding,

(9) In order to meet the service requirements in a large-scale wide-area openness scene, including global network state information collection, end-to-end route management and the like, the invention provides a cooperation and management scheme of a distributed deterministic controller, the scheme designs a network functional entity for collecting the information of global network state, service load and the like in the related service flow communication process and executing end-to-end route management and service flow scheduling,

(10) The information collected and interacted by the collaboration and management scheme of the distributed deterministic controller in the large-scale wide-area open network is relatively small in scale, and only the information such as global network topology information and business load related to the corresponding deterministic autonomous domain is required to be collected. Meanwhile, the size of the collected information is positively correlated with the traffic scale of the corresponding deterministic autonomous domain. By adopting the cooperation and management scheme of the distributed deterministic controller, the requirements of service load balancing and the like of a large-scale wide-area open network can be met. According to the scheme, the service flows corresponding to different user terminals are distributed on different network functional entities to carry out route management and service flow scheduling, so that the problems of single computing node, overlarge service load and the like in a large-scale wide-area open scene are avoided.

Drawings

Figure 1 is a functional distribution diagram of a large-scale wide-area deterministic network architecture according to an embodiment of the present invention,

Figure 2 is a schematic diagram of the role and attributes of a distributed deterministic controller according to an embodiment of the present invention,

Figure 3 is a schematic diagram of the operation of the openness interfaces related to each functional entity according to an embodiment of the present invention,

Figure 4 is a schematic diagram of a deterministic autonomous domain controller information collection process according to an embodiment of the present invention,

Figure 5 is a schematic diagram of signaling interactions during traffic flow initiation in an embodiment of the present invention,

FIG. 6 is a schematic diagram showing the functional mode switching and correlation of a deterministic autonomous domain controller according to an embodiment of the present invention,

Fig. 7 is a schematic diagram of a cooperative interaction process of deterministic autonomous domain controllers according to an embodiment of the present invention.

Detailed Description

In order to enhance the understanding of the present invention, the present embodiment will be described in detail with reference to the accompanying drawings.

Example 1: referring to fig. 1-7, the collaborative management method for the distributed deterministic controllers in the large-scale wide-area open network provided by the invention can realize the collection of information such as global network state and the like in the large-scale wide-area deterministic network, the forwarding of cross-domain end-to-end low-delay data and the like, and effectively avoid and reduce delay and jitter caused by network centralized control. In addition, the scheme enables the network to have the capability of adapting to the load balancing requirement in the emerging application scene, and specifically comprises the following steps:

step 3: further, when initiating the communication of deterministic traffic, providing a distributed deterministic autonomous domain controller information collection method, which only collects the information such AS network state in the relevant Det-AS of the traffic communication initiated at this time;

step 4: when the deterministic service flow communication is carried out, the distributed deterministic autonomous domain controller carries out the switching of each functional mode according to the service flow information, the network state, the network requirement and other information so as to dynamically adjust to optimize the network performance;

Step 5: and the Det-AS controllers cooperatively interact, and the information of each Det-AS controller is transmitted through reconfiguration and path planning so AS to calculate the end-to-end data forwarding delay, thereby optimizing the data forwarding delay of the deterministic service flow.

In the following, the configuration of the Det-AS controller and the roles and properties of the respective functional modes are described in detail in step 1. Referring to fig. 2, the first layer represents the functional distribution of the respective Det-AS controllers, and the second layer represents the domain topology of the large-scale wide area network. The core idea of the distributed deterministic controller cooperation and management scheme provided by the invention is to solve the problems of huge network scale, difficult management, difficult control and the like faced by a large-scale wide area deterministic network and realize the effects of load balancing, end-to-end low-delay data forwarding and the like. Therefore, the invention adopts the deterministic controller to control and manage the large-scale open network, but the direct deployment of the Det-AS controller faces a plurality of problems, such AS wide optimizing range, large calculation complexity, long calculation time and the like.

In order to solve the problems, the invention provides a network function entity of a distributed deterministic controller in a multifunctional mode, which can perform distributed processing on a large-scale wide area deterministic network and realize the aims of end-to-end load balancing, low-delay data forwarding, high reliability and the like by the deterministic controller in the multifunctional mode. The method comprises the following specific steps:

Step 101: first, a large-scale wide area deterministic network is divided into a plurality of Det-ases according to a certain rule for domain management. Each Det-AS comprises a plurality of routing devices and terminal devices, wherein ER is used for realizing cross-domain data forwarding, and FR is used for intra-domain data forwarding;

step 102: and then, determining the source Det-AS, the destination Det-AS and the relay Det-AS according to deterministic service flows initiated by different user terminals. For different Det-AS, each Det-AS controller performs different functions through the C1 interface. As shown, two different types of traffic streams are taken as an example, and they correspond to two different receiving end users, namely, the terminal 1 sends traffic streams f1 and f2 to the terminal 2 and the terminal 3 respectively;

Step 103: further, control and management of each Det-AS is performed by a Det-AS controller, and the Det-AS controller performs different functional modes according to the Det-AS corresponding to the access terminal. The source Det-AS and the relay Det-AS generally adopt functions of intra-domain control and inter-domain interaction, and the destination Det-AS has an end-to-end control function in addition to the above two functions. For example, for a traffic flow f1 initiated by an end user, a controller accessing the Det-AS2 will provide it with an end-to-end secondary routing computing platform, and for the traffic flow f2, the Det-AS3 controller will perform functions of intra-domain control, inter-domain interaction and end-to-end control;

Step 104: finally, according to the function distribution of the deterministic controller, the intra-domain control function is responsible for collecting information such as network state in the domain and executing tasks such as routing calculation in the domain; the inter-domain interaction function is responsible for inter-domain information forwarding and the like; the end-to-end control function is responsible for collecting information such as global network state in the communication process of related service flows, and executing end-to-end route calculation to ensure end-to-end data forwarding.

The process of initiating communication by the traffic flow of the entire large-scale wide-area deterministic network in step 2 involves a number of steps including terminal traffic demand acquisition, network topology discovery, network control and management, user terminal configuration and network monitoring, thus ensuring smooth transmission of deterministic traffic flows, the following are detailed steps:

Step 201: the end user initiates a deterministic service request to a deterministic service manager through an application programming interface protocol. The deterministic service manager collects the service demands of different terminal users initiating communication so as to configure deterministic characteristics for the terminal users;

step 202: the deterministic service manager transmits the collected deterministic service demands to each Det-AS controller through a user network information protocol configured by an N1 interface so AS to meet the acquisition of the service demands of different terminals. The functional modes of the Det-AS controller comprise intra-domain control, inter-domain interaction and end-to-end control;

Step 203: after each Det-AS controller collects service demands, network topology discovery in the Det-AS is performed. Each Det-AS uploads information such AS network status in the domain to each domain controller via the network management protocol of the C1 interface. Then, each intra-domain controller performs an intra-domain control function. Carrying out initial intra-domain route calculation and scheduling management on the collected information such as service requirements, network states in the domain and the like;

Step 204: further, each intra-domain controller issues a routing and scheduling strategy in the Det-AS to each corresponding Det-AS to configure an intra-domain deterministic network, so AS to guide network equipment in the domain to route and schedule deterministic traffic flows according to a certain rule;

Step 205: and each Det-AS controller obtains the information such AS network state, routing and time delay results of each domain according to the intra-domain control operation so AS to control and manage each Det-AS. Each Det-AS controller executes an inter-domain interaction function through a C2 interface protocol, performs cross-domain information forwarding and interacts information such AS message content, intra-domain traffic load and the like of other Det-AS controllers;

Step 206: further, each Det-AS controller gathers the obtained network information such AS time delay to the Det-AS controller with the end-to-end control function, and the end-to-end controller calculates the end-to-end data forwarding time delay and the like according to the collected relevant information in the Det-AS. In order to meet the deterministic service requirement of a specific user terminal and realize the optimal data forwarding delay, an end-to-end controller cooperates with each intra-domain controller and an inter-domain interaction controller to make an optimal strategy of the end-to-end data forwarding delay;

step 207: through coordination and interaction of the Det-AS controllers, each Det-AS controller carries out real-time self-adaptive adjustment on the intra-domain network according to allocation of the end-to-end controllers, and issues tasks such AS intra-domain network reconfiguration, intra-domain service flow forwarding paths and the like to the Det-AS;

Step 208: each Det-AS controller reports the result of the reconfiguration and planning of the service flow in the respective domain to the corresponding end-to-end controller through the inter-domain interaction controller, and the end-to-end controller carries out calculation of the end-to-end optimal data forwarding delay and the like of the large-scale wide area deterministic network again according to the reported configuration information;

step 209: according to the cooperative operation of each Det-AS controller, the Det-AS controller with the end-to-end control function feeds back the information such AS the calculated end-to-end optimal data forwarding delay and the like to a deterministic service manager, and the deterministic service manager performs corresponding configuration and management and other operations on the user terminal;

Step 210: and according to the configuration result of the deterministic service manager, the deployment of the deterministic network characteristics of the user terminal equipment is realized. Further, after all the configuration and deployment operations are completed, the user terminal equipment starts to transmit deterministic service flows;

Step 211: when a deterministic traffic flow starts to be transmitted, each Det-AS controller needs to monitor the network state within each Det-AS. Each Det-AS controller should discover the newly initiated service flow or network fault in the deterministic network in real time, so AS to reconfigure the network in each Det-AS according to the network state information and the requirement of the service flow;

Step 212: if the network state in a certain domain changes, each Det-AS controller needs to make corresponding configuration update for the current network situation. And executing an intra-domain control function through the Det-AS controller, performing intra-domain routing computation, management and other operations, updating the configuration of the intra-domain deterministic network, reporting the routing, time delay computation results, fault recovery and other conditions to the end-to-end controller through the inter-domain interaction controller, and repeatedly executing the Det-AS controller configuration and the cooperative operation until the configuration and deployment of the user terminal are realized.

The steps together form a deterministic traffic flow initiation process, which ensures that each deterministic traffic flow can meet user requirements and can achieve optimal deterministic network performance in a large-scale wide-area deterministic network. This process encompasses coordination and configuration at different levels to ensure efficient operation of the network.

Referring to fig. 4, taking three pairs of terminal initiated traffic flow communication AS an example, the process of collecting information such AS global network status, traffic load, etc. in a large-scale wide area deterministic network by a Det-AS controller is described in detail. Meanwhile, information collection plays an important role in the end-to-end route calculation and service flow scheduling process. The information collection process in step 3 is specifically as follows:

According to deterministic service flows initiated by different terminals, source Det-AS and destination Det-AS corresponding to different service flows can be determined. As shown in fig. 4, traffic flows f1 and f2 are transmitted from terminal 1 to terminal 2 and terminal 3, respectively, and traffic flow f3 is transmitted from terminal 2 to terminal 4. Obviously, the source Det-AS corresponding to traffic flows f1 and f2 are Det-AS1, and the source Det-AS corresponding to traffic flow f3 is Det-AS2. And the destination Det-AS corresponding to the traffic flows f1, f2 and f3 are Det-AS2, det-AS3 and Det-AS4, respectively.

Further, according to the above description, each Det-AS controller first performs a domain control function, and collects information on a node state, a link state, and the like in a domain, and information on a domain delay, and the like, to the Det-AS controller. And then, mutual collaboration, cross-domain forwarding and the like are performed through the inter-domain interaction function of the Det-AS controllers, and information such AS the network state of each Det-AS is summarized to the end-to-end controller to which the destination Det-AS belongs. From the scale of the collected information, the end-to-end controller of the Det-AS collects the information and the service scale of the relevant Det-AS are positively correlated, and only the network information of the relevant Det-AS of the initiated current service flow communication is required to be collected, and the information of the whole network is not converged to the controller, so that the network load of the Det-AS controller is greatly reduced. For example, for the traffic flow f2, there are two ways to collect information, it may reach the destination Det-AS corresponding to the traffic flow through different Det-AS, and the Det-AS3 controller will collect network information of Det-AS1 and Det-AS 2. Specifically, the service flow f2 may reach the destination Det-AS through the relay Det-AS of the Det-AS2, or may directly reach the Det-AS2 from the Det-AS1 to the Det-AS2, but compared with the collection of the whole network information of the large-scale wide area deterministic network, the information collection mode greatly reduces the scale of the collected information.

Compared with the traditional centralized control method, the control and management scheme of the distributed deterministic controller provided by the invention has the advantages that the scale of the collected information is obviously reduced, the scheme only needs to collect the information such AS global network state information, service load and the like of the Det-AS related to the current service flow communication, and the information of the whole network is not required to be summarized to the same centralized control node for calculation and processing, so that the problems of network failure, single calculation node and the like possibly caused by overlarge service load are avoided. Meanwhile, the interaction scale between the Det-AS controllers is also greatly reduced, all Det-AS controllers of the whole network do not need to be traversed, and only cross-domain information interaction and coordination between the Det-AS controllers and the Det-AS controllers related to the service flow are needed, so that the waste of controller resources and the increase of traversing complexity are avoided.

Compared with the traditional centralized control method, the control and management scheme of the distributed deterministic controller has the advantages of obvious information scale reduction, load balancing, effective resource utilization and the like.

Referring to fig. 6, the switching process and the correlation of each functional mode of the Det-AS controller in step 4 will be further described mainly for the deterministic traffic flow f1 initiated at this time. The distributed Det-AS controller provided by the invention can meet the requirement of load balancing in a large-scale wide area deterministic network.

Specifically, taking deterministic traffic flows f1 and f2 initiated from a sending end to a receiving end AS an example, a Det-AS controller with an end-to-end control function is used to coordinate data forwarding of other Det-AS controllers, so AS to meet the requirements of specific traffic flows initiated by a terminal. Meanwhile, the Det-AS controller can dynamically adjust the functional modes of the Det-AS controller according to different service flow terminals so AS to realize distributed end-to-end data forwarding in the open large-scale wide area deterministic network. The following are the detailed steps of the Det-AS controller function mode switch:

step 401: for the traffic flow f1, the transmitting end is connected with the Det-AS1, and the traffic flow f1 is transmitted from the Det-AS1 to the Det-AS5 for receiving. Firstly, a Det-AS1 controller transmits the requirement of a deterministic service flow f1 collected by a deterministic service manager to the Det-AS1 controller through an N1 interface;

Step 402: further, the Det-AS1 controller executes a domain control function, which is mainly responsible for collecting node information, link information, network state and other information in the Det-AS, and applying the information and the control and management policies selected by the controller to corresponding domain network equipment to perform domain network management and route calculation so AS to meet the requirements of service flows;

Step 403: after operations such AS route calculation, service flow management and the like are issued through a C1 interface through the intra-domain control function of the Det-AS1 controller, the deterministic service flow in the Det-AS1 forwards data in the Det-AS, and the calculation result in the Det-AS is uploaded to the Det-AS1 controller. This ensures that within the Det-AS, traffic flows are transmitted with a lower latency data forwarding path;

Step 404: according to the data forwarding in the Det-AS1, the service flow f1 is forwarded to the border router, and a connection relationship is established between the border router and the next Det-AS. Meanwhile, after the service flow f1 enters the next Det-AS, the controller of the Det-AS also executes the intra-domain control operation. As shown in fig. 6, there are two modes of cross-domain forwarding of traffic flow f1, denoted by f1.1 and f1.2, respectively. f1.1 represents one of the cross-domain forwarding paths, traffic flow f1 is forwarded from Det-AS1 to Det-AS 5. f1.2 indicates that the service flow f1 is forwarded from the Det-AS1 to the Det-AS2 and then from the Det-AS2 to the Det-AS5;

Step 405: and the controller of each Det-AS related to the Det-AS1 obtains network state information such AS data forwarding delay, service load and the like in each domain according to route calculation and traffic management in the domain. Further, each Det-AS controller makes a more global decision by executing an inter-domain interaction function, and forwards the information to the Det-AS5 controller in a cross-domain manner through a C2 interface;

Step 406: when the relevant Det-AS controller of the service flow f1 collects the information in each domain to the Det-AS5 controller by executing the inter-domain interaction function, the Det-AS5 controller provides an end-to-end data forwarding computing platform for the collected information. The global route setting is adjusted by executing the end-to-end control function so as to carry out end-to-end secondary route, thereby ensuring that the service flow meets the requirements of specific terminal users, and realizing the calculation of end-to-end optimal deterministic service flow forwarding delay and the like;

step 408: finally, the end-to-end data forwarding of the deterministic service flow f2 can be achieved by matching the relevant Det-AS controllers in the steps, and the optimal end-to-end service flow forwarding path of the service flow f2 can be achieved, and corresponding data forwarding delay can be achieved, so that the requirement of distributed deterministic communication in the open large-scale wide area deterministic network can be met. AS shown in fig. 6, the traffic flow f2 is forwarded from the Det-AS4 to the Det-AS3, and there are two modes of cross-domain forwarding of the traffic flow, denoted by f2.1 and f2.2, respectively. In the process of forwarding the service flow, the Det-AS3 controller has an end-to-end control function, so that the switching of the functional modes of the Det-AS controller can effectively realize the load balancing of the large-scale wide area deterministic network.

In step 5, the process of cooperative interaction between Det-AS controllers is shown in FIG. 7. The interactive information process is based on forwarding information collected by each Det-AS controller and switching of functional modes of each Det-AS controller through a C2 interface.

First, each relevant Det-AS controller in the large-scale wide area deterministic network control plane executes the intra-domain control function through the C1 interface, and collects the network state information, routing information, time delay calculation result and other information in each domain in the data plane. This process is an important step in the distributed deterministic controller control and management scheme, ensuring that the end-to-end controller is able to obtain detailed information from within the relevant Det-AS.

And secondly, each Det-AS controller executes an inter-domain interaction function, carries out cross-domain forwarding on the collected information such AS the time delay, the service load, the network state and the like of the related Det-AS, and transmits the information to the adjacent Det-AS controllers. AS shown in the figure, the dashed arrow of the control plane indicates that information is sent from the Det-AS corresponding to the sending end until all the information such AS the network status of the intra-domain controller of the relevant Det-AS is transferred to the Det-AS controller (Det-AS 5 controller) corresponding to the receiving end.

And finally, after the end-to-end controller collects and gathers relevant Det-AS controller information initiated by the service, the end-to-end controller coordinates other Det-AS controllers to perform operations such AS reconfiguration and planning of each Det-AS and issues configuration to the data forwarding plane. Further, the end-to-end controller finally selects the optimal route forwarding path to ensure that the open large-scale wide area deterministic network can realize low-delay data forwarding. AS shown in the figure, the end-to-end controller (Det-AS 5 controller) cooperates with the relevant Det-AS controller, obviously, reconfiguration may cause interaction between the corresponding Det-AS controllers to change, and the inside of each Det-AS and between Det-AS of the corresponding data forwarding plane also change along with the change of the control plane. The solid arrows represent the end-to-end secondary route interaction process of reconfiguration and planning by each Det-AS controller, and a plurality of planning modes among the controllers can be seen to realize the end-to-end low-delay data forwarding effect. And correspondingly in a data forwarding plane, according to coordination and interaction of the Det-AS controllers, obtaining a plurality of end-to-end time delay results (shown AS diagrams T1-T4), and finally, selecting an optimal route planning path (shown AS T1) by the end-to-end controllers according to application requirements.

Example 2: referring to fig. 1-7, a collaboration and management system of a distributed deterministic controller in a large-scale wide area open network realizes end-to-end low-delay data forwarding of a large-scale wide area deterministic network cross-domain by designing network function distribution, a multifunctional mode controller and the like. The core ideas of the cooperation and management scheme of the distributed deterministic controller are as follows: the open large-scale wide area deterministic network is divided into a plurality of closed Det-AS (deterministic autonomous domain) (DETERMINISTIC AUTONOMOUS SYSTEM, det-AS) with smaller range according to different network requirements, and the functional distribution diagram of the large-scale wide area deterministic network architecture is shown in figure 1, and the network architecture comprises a deterministic service manager, a deterministic autonomous domain controller and a plurality of deterministic autonomous domains. In the network architecture, a plurality of user terminals can be accessed in the same Det-AS, and the user terminals comprise heterogeneous services of various types, such AS intelligent factories, automatic driving and the like.

The main network elements and functional entities involved in the network architecture include:

Det-AS, describes a domain-division management architecture for an entire open large-scale wide-area deterministic network, including a source Det-AS, a relay Det-AS, and a destination Det-AS. Each Det-AS comprises a plurality of routers and user terminal equipment. The Router device comprises a forwarding Router (Forwarding Router, FR) and a border Router (ER) which are respectively used for realizing intra-domain data forwarding and cross-domain data forwarding of deterministic traffic. The router device comprises a forwarding router and a boundary router which are respectively used for realizing intra-domain data forwarding and cross-domain data forwarding of deterministic traffic flows. The source Det-AS refers to the domain of the sending end equipment, the destination Det-AS refers to the domain of the receiving end equipment, and the relay Det-AS refers to all Det-AS except the sending end equipment and the receiving end equipment. By setting the Det-AS, domain control and management of the open large-scale wide area deterministic network can be realized, thereby reducing computational complexity and improving manageability of the network.

The Det-AS controller comprises three functional modes of intra-domain control, inter-domain interaction and end-to-end control. The multifunctional mode controller provided by the invention is beneficial to managing and scheduling the whole open large-scale wide area deterministic network. The intra-domain control is used for route calculation and network management in each Det-AS, the inter-domain interaction is used for transferring and sharing information among the Det-AS controllers, the end-to-end control is used for receiving the domain of the end user, and a calculation platform is provided for the end-to-end optimal route calculation of the related service flow. Such a multi-mode Det-AS controller facilitates collaborative management of the network. The invention provides a cooperation and management scheme of a distributed deterministic controller in a large-scale wide-area open network, which comprises the steps that firstly, a domain control function is executed through each Det-AS controller to perform routing calculation in the Det-AS; then, summarizing the information such AS intra-domain information and calculation results to the Det-AS controller where the receiving end is located through the inter-domain interaction function of each Det-AS controller; and finally, executing an end-to-end control function by the Det-AS controller where the receiving end is positioned to perform secondary route calculation so AS to obtain the end-to-end global optimal data forwarding delay. Furthermore, each controller of the Det-AS may set the above three functional modes, the switching of which is mainly determined by the originating traffic flow.

Deterministic traffic managers include end user discovery, end user information registration, user demand collection, end user configuration, and heterogeneous traffic handling, where registration typically includes information such as application ID, traffic transmission period, traffic size, and quality of service requirements of the application. At the same time, the service manager is distinguished from other controllers, and its main role is to perform end user configuration. By providing a deterministic traffic manager, it is possible to avoid implementing these functions by complex network configurations and by undergoing hop-by-hop network forwarding.

The open interfaces of the functional entities related to the network architecture are specifically as follows:

In this embodiment, taking simple data forwarding of a pair of end users as an example, the working process and the transferred information of the relevant interfaces of each functional entity in the large-scale wide-area deterministic network architecture will be described in detail, referring to fig. 3. These open interfaces play a key role in achieving coordination and configuration in a large-scale wide-area deterministic network.

Deterministic traffic manager-controller interface N1 through which the deterministic traffic manager issues traffic demands obtained from end users to the respective Det-AS controllers of the control plane to ensure that the specific demands of the end users are met. Meanwhile, network state information such AS routing and time delay in each Det-AS of the control plane can be collected for configuration use by end users, and the end users can be applied to different deterministic network scenes such AS automatic driving, intelligent factories, intelligent power grids and the like. In addition, the interface can support various deterministic traffic demands, including load balancing, intelligent routing, traffic flow scheduling, and ultra-high reliability low latency traffic demands, etc. Through the interface, each Det-AS controller can be configured and optimized according to the service demands of different user terminals, thereby realizing the high flexibility and adaptability of the open large-scale wide-area deterministic network.

The deterministic controller-Det-AS interface C1, through which the intra-domain network state information, traffic load, etc. of each Det-AS can be uploaded to the Det-AS controller responsible for controlling and managing each domain. The real-time uploading of the network state is helpful for the Det-AS controller to execute subsequent related work. Then, each Det-AS controller monitors the network state, route management, service flow scheduling and other operations of each Det-AS in real time through the network state information so AS to ensure that each Det-AS meets specific deterministic service requirements. Further, each Det-AS controller issues policies such AS routing configuration in a corresponding domain to routing devices in each domain through the C1 interface, so AS to ensure that the network devices in the Det-AS can manage and process deterministic traffic flows according to specific rules. And finally, obtaining information such AS routing and time delay results in each domain through calculation of the Det-AS controllers so AS to maintain and adjust the global network state in the related service flow process, and enabling the Det-AS controllers to adjust and optimize to meet the continuously-changing deterministic service flow demands. The C1 interface is helpful to realize the real-time response and flexibility of each Det-AS so AS to adapt to various network conditions and end user requirements.

And an interface C2 between the deterministic controllers, wherein the interface is used for information interaction between different controllers of the control plane, in particular cooperation between Det-AS controllers. The functional distribution and properties of the multifunctional mode Det-AS controller are described in detail in embodiment 2. Thus, the cooperation and other related operations between the Det-AS controllers need to be realized through C2. And executing an intra-domain control function through each Det-AS controller, collecting the information such AS the network state in each Det-AS, performing initial intra-domain route calculation, and forwarding the intra-domain calculation result, network congestion and other information to the Det-AS controller with an end-to-end control function through the inter-domain interaction function of each Det-AS controller. At this time, the Det-AS controller is used AS a global information controller for summarizing the current service flow, has the computing capability of global network information, and performs further end-to-end secondary route computation and network optimization decision by using the owned global network information so AS to obtain the optimal end-to-end data forwarding delay of the current service flow. Through the C2 interface, the cooperation between different Det-AS controllers is realized, so that the global network state is optimized and managed. Such information sharing and co-operation helps to ensure the efficiency and reliability of the entire open large-scale wide-area deterministic network. The multi-function mode controller is better able to cope with complex network conditions and end user demand variations.

A terminal interface U1, which interfaces to each end user of each source/destination Det-AS (e.g. autopilot, smart factory, etc. application). The interface is responsible for data transfer between the end user and the Det-AS and allows end user devices supporting deterministic functions to communicate with the corresponding source/destination Det-AS via the interface.

And a device interface R1 in the Det-AS, which is connected with the network device in the same Det-AS. The interface is mainly responsible for realizing communication connection between network devices in each Det-AS in the distributed Det-AS system, and allowing the network devices to perform data forwarding and resource sharing in the same Det-AS through the interface.

The inter-Det-AS device interface R2 is used for connecting different Det-AS devices, and is mainly used for connecting cross-domain network devices (such AS boundary routers and other devices) among different Det-AS devices in a large-scale open deterministic network and is beneficial to realizing cross-domain communication and data transmission among different Det-AS devices.

It should be noted that the above-mentioned embodiments are not intended to limit the scope of the present invention, and equivalent changes or substitutions made on the basis of the above-mentioned technical solutions fall within the scope of the present invention as defined in the claims.

Claims

1. The collaborative management method for the distributed deterministic controllers in the large-scale wide-area open network is characterized by comprising the following steps:

Step 1: dividing the original open large-scale wide area deterministic network into a plurality of Det-AS according to the network demand dividing rule, configuring each Det-AS controller and the function distribution thereof aiming at the service flows of different user terminals accessing the Det-AS,

Step 2: realizing the communication process of deterministic service flow through the open interface of each functional entity in the large-scale wide-area deterministic network architecture, when the terminal user initiates deterministic service flow, the related information of the service flow is transmitted to the network equipment through the open interface,

Step 3: when initiating communication of deterministic traffic, a distributed deterministic autonomous domain controller information collection method is provided, which collects only network state information in the Det-AS related to the traffic communication initiated this time,

Step 4: when the deterministic traffic flow communication is performed, the distributed deterministic autonomous domain controller performs the function mode switching of each Det-AS controller according to the traffic flow information, the network state and the network demand information,

Step 5: the Det-AS controllers perform cooperative interaction, and the information of each Det-AS controller is transmitted through reconfiguration and path planning so AS to perform end-to-end data forwarding delay calculation;

Wherein, step 1 is specifically as follows:

Step 101: firstly, dividing a large-scale wide area deterministic network into a plurality of Det-AS (deterministic autonomous domains) for domain division management, wherein each Det-AS comprises a plurality of router devices and terminal devices, each router device comprises a forwarding router and a boundary router, ER is used for realizing cross-domain data forwarding, and FR is used for forwarding data in a domain;

Step 102: then, determining a source Det-AS, a destination Det-AS and a relay Det-AS according to deterministic service flows initiated by different user terminals, and executing different functions by each Det-AS controller through a C1 interface aiming at different Det-AS;

Step 103: the control and management of each Det-AS are executed by a Det-AS controller, and according to different Det-AS corresponding to an access terminal, the Det-AS controller executes different function modes, the source Det-AS and the relay Det-AS adopt functions of intra-domain control and inter-domain interaction, and the destination Det-AS has the functions of end-to-end control besides the two functions;

Step 104: finally, according to the function distribution of the deterministic controller, the intra-domain control function is responsible for collecting network state information in the domain and executing a routing calculation task in the domain; the inter-domain interaction function is responsible for forwarding inter-domain information; the end-to-end control function is responsible for collecting global network state information in the communication process of related service flows and executing end-to-end route calculation so as to ensure end-to-end data forwarding;

wherein, step 2 is specifically as follows:

Step 201: the terminal user initiates a deterministic service request to a deterministic service manager through an application programming interface protocol, and the deterministic service manager collects service requirements of different terminal users initiating communication and configures deterministic characteristics of the terminal users;

Step 202: the deterministic service manager transmits the collected deterministic service demands to each Det-AS controller through a user network information protocol configured by an N1 interface, and the acquisition of the service demands of different terminals is met, wherein the functional modes of the Det-AS controller comprise intra-domain control, inter-domain interaction and end-to-end control;

Step 204: the controller in each domain issues a routing and scheduling strategy in the Det-AS to each corresponding Det-AS to configure a domain deterministic network, so AS to guide network equipment in the domain to route and schedule deterministic traffic flows according to rules;

Step 205: each Det-AS controller obtains network state, route and time delay result information of each domain according to intra-domain control operation, controls and manages each Det-AS, and executes inter-domain interaction function through C2 interface protocol, forwards cross-domain information and interacts message content of other Det-AS controllers and service load information of the domain;

Step 206: the Det-AS controllers gather the obtained time delay network information to the Det-AS controller with an end-to-end control function, the end-to-end controller calculates end-to-end data forwarding time delay according to the collected relevant Det-AS internal information, and the end-to-end controller cooperates with each intra-domain controller and inter-domain interaction controller to make an optimal strategy of end-to-end data forwarding time delay;

Step 209: according to the cooperative operation of each Det-AS controller, the Det-AS controller with the end-to-end control function feeds the calculated end-to-end optimal data forwarding delay information back to the deterministic service manager, and the deterministic service manager performs corresponding configuration and management operation on the user terminal;

Step 211: when deterministic traffic flows are started to be transmitted, each Det-AS controller needs to monitor the network state in each Det-AS, wherein each Det-AS controller needs to discover newly initiated traffic flows or network fault conditions in a deterministic network in real time, and perform reconfiguration operation on the network in each Det-AS according to network state information and traffic flow requirements;

2. The collaborative management method for distributed deterministic controllers in a large-scale wide-area open network according to claim 1, wherein the information collection method in step 3 is specifically as follows:

According to deterministic service flows initiated by different terminals, each Det-AS controller firstly executes a domain control function, collects node states, link states and domain time delay network state information in the domain to the Det-AS controller, then performs mutual collaboration and cross-domain forwarding through the inter-domain interaction function of the Det-AS controller, gathers the network state information of each Det-AS to an end-to-end controller to which a destination Det-AS belongs, and the size of the collected information of the end-to-end controller of the Det-AS is positively correlated with the service scale of the related Det-AS.

3. The collaborative management method for distributed deterministic controllers in a large-scale wide-area open network according to claim 1, wherein the detailed steps of the Det-AS controller function mode switching in step 4 are AS follows:

Step 401: for the service flow f1, a transmitting end is connected with the Det-AS1, the service flow f1 is transmitted from the Det-AS1 to the Det-AS5 for receiving, firstly, a Det-AS1 controller transmits the requirement of the deterministic service flow f1 collected by a deterministic service manager to the Det-AS1 controller through an N1 interface;

step 403: after routing calculation and service flow management operations are issued through a C1 interface through the intra-domain control function of the Det-AS1 controller, the deterministic service flow in the Det-AS1 forwards data in the Det-AS, and the calculation result in the Det-AS is uploaded to the Det-AS1 controller;

Step 404: according to data forwarding in the Det-AS1, forwarding the service flow f1 to a border router, establishing a connection relationship with the next Det-AS through the border router, and simultaneously, after the service flow f1 enters the next Det-AS, executing intra-domain control operation by a controller of the Det-AS, wherein the cross-domain forwarding of the service flow f1 is respectively represented by f1.1 and f1.2, f1.1 represents one of the cross-domain forwarding paths, the service flow f1 is forwarded from the Det-AS1 to the Det-AS5, and f1.2 represents the service flow f1 is forwarded from the Det-AS1 to the Det-AS2 and then is forwarded from the Det-AS2 to the Det-AS5;

step 405: the controllers of the Det-AS related to the Det-AS1 obtain data forwarding delay and service load network state information in each domain according to route calculation and flow management in the domain, and the Det-AS controllers make a more global decision by executing an inter-domain interaction function and forward the information to the Det-AS5 controller in a cross-domain manner through a C2 interface;

step 406: when the related Det-AS controller of the service flow f1 collects the information in each domain to the Det-AS5 controller by executing the inter-domain interaction function, the Det-AS5 controller provides an end-to-end data forwarding computing platform for the collected information, adjusts the global routing setting thereof by executing the end-to-end control function so AS to perform end-to-end secondary routing, ensures that the service flow meets the requirements of the terminal user, and realizes the end-to-end optimal deterministic service flow forwarding delay computation;

Step 407: the end-to-end controllers coordinate other Det-AS controllers, so that each Det-AS controller responds to the adjustment of the end-to-end controllers and the dynamic change of the network in real time, and updates the network configuration in the Det-AS in real time, thereby being suitable for various network emergency situations;

Step 408: finally, the end-to-end data forwarding of the deterministic service flow f2 is also carried out by matching the relevant Det-AS controllers in the steps, so that the optimal end-to-end service flow forwarding path of the service flow f2 is obtained, the corresponding data forwarding delay is obtained, the distributed deterministic communication requirement in the open large-scale wide area deterministic network is met, the service flow f2 is forwarded from the Det-AS4 to the Det-AS3, the cross-domain forwarding of the service flow is also in two ways, which are respectively represented by f2.1 and f2.2, and in the process of forwarding the service flow, the Det-AS3 controller has an end-to-end control function.

4. The collaborative management method for distributed deterministic controllers in a large-scale wide-area open network according to claim 1, wherein the collaborative interaction process between Det-AS controllers in step 5 is specifically AS follows:

firstly, each relevant Det-AS controller in a large-scale wide area deterministic network control plane executes a domain control function through a C1 interface, collects network state information, routing information and time delay calculation result information in each domain in a data plane,

Secondly, each Det-AS controller executes an inter-domain interaction function, carries out cross-domain forwarding on the time delay, the service load and the network state information of the related Det-AS, transmits the information to the Det-AS controller of a receiving end, and carries out end-to-end routing and scheduling calculation initiated by the service flow according to the deterministic service demand of the terminal user acquired from a deterministic service manager;

And finally, after the end-to-end controller collects and gathers relevant Det-AS controller information initiated by the service, the end-to-end controller coordinates other Det-AS controllers to perform reconfiguration and planning operations of the Det-AS, and issues configuration to the data forwarding plane.

5. A collaborative management system for distributed deterministic controllers in a large-scale wide-area open network, characterized in that a collaborative management method according to any of claims 1-4 is implemented, the system controls and manages the large-scale wide-area deterministic network by adopting a collaborative and management scheme for distributed deterministic controllers, the system is divided into three layers, wherein the first layer represents deterministic traffic manager for heterogeneous traffic, the second layer represents functional distribution of each Det-AS controller, and the third layer represents domain topology of the large-scale wide-area deterministic network.

6. A collaborative management system for distributed deterministic controllers in a large-scale wide area open network according to claim 5 wherein said collaborative and management system comprises a deterministic traffic manager, a deterministic autonomous domain controller and a plurality of deterministic autonomous domains, in which system a plurality of user terminals are accessed in the same Det-AS, the user terminals comprising heterogeneous traffic of multiple types, the control and management of each Det-AS being performed by the Det-AS controller.

7. The collaborative management system for distributed deterministic controllers in a large-scale wide-area open network as set forth in claim 6,

The deterministic autonomous domain is Det-AS, including source Det-AS, relay Det-AS and destination Det-AS, each Det-AS is formed by several routers and terminal equipment, the router equipment includes forwarding router and border router, is used for realizing the intra-domain data forwarding and cross-domain data forwarding of deterministic traffic flow separately, source Det-AS refers to the domain of the sending end equipment, destination Det-AS refers to the domain of the receiving end equipment, relay Det-AS refers to all Det-AS except the sending end and receiving end equipment, realize the domain control and management of the open large-scale wide area deterministic network by setting Det-AS, reduce the computational complexity and improve the manageability of the network;

The deterministic autonomous domain controller is a Det-AS controller, and comprises three functional modes, namely intra-domain control, inter-domain interaction and end-to-end control, wherein the intra-domain control is used for route calculation and network management in each Det-AS, the inter-domain interaction is used for transmitting and sharing information among the Det-AS controllers, and the end-to-end control is used for receiving a domain where an end user is located and providing a computing platform for end-to-end optimal route calculation of related service flows;

The deterministic service manager comprises end user discovery, end user information registration, user demand collection, end user configuration and heterogeneous service flow processing functions, and is mainly used for carrying out end user configuration, and the functions are prevented from being realized through complex network configuration and network forwarding by hop by arranging the deterministic service manager.

8. The collaborative management system of a distributed deterministic controller in a large-scale wide-area open network according to claim 7, wherein the open interfaces of the functional entities in the collaborative management system are as follows:

a deterministic traffic manager-controller interface N1 through which the deterministic traffic manager issues traffic demands acquired from end users to the Det-AS controllers of the control plane to ensure that the end user demands are met, while collecting routing and latency network state information within the Det-AS of the control plane for end user configuration,

The method comprises the steps that a deterministic controller-Det-AS interface C1 is adopted, each Det-AS uploads intra-domain network state information and service load information to a Det-AS controller responsible for controlling and managing each domain, then each Det-AS controller monitors network state, route management and service flow scheduling operation on each Det-AS in real time by utilizing the network state information, each Det-AS controller transmits a route selection configuration strategy in a corresponding domain to route equipment in each domain through the C1 interface so AS to ensure that the intra-Det-AS network equipment can manage and process deterministic service flows according to rules, and finally each Det-AS controller obtains route and time delay result information in each domain through calculation so AS to maintain and adjust global network states in relevant service flow communication processes, and each Det-AS controller can be adjusted and optimized to meet the continuously changing deterministic service flow demands;

An interface C2 between the different controllers of the control plane, wherein the interface is used for information interaction between the different controllers of the control plane, comprises cooperation between the Det-AS controllers, performs intra-domain control function through each Det-AS controller, performs initial intra-domain route calculation on the collected network state information in each Det-AS, and forwards intra-domain calculation results and network congestion information to the Det-AS controller with an end-to-end control function through the inter-domain interaction function of each Det-AS controller, the Det-AS controller is used AS a global information controller for summarizing the current service flow, has the calculation capability of global network information, performs further end-to-end secondary route calculation and network optimization decision through the interface to obtain the optimal end-to-end data forwarding delay of the current service flow,