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CN-116723551-B - Time delay guaranteeing method for cloud PLC service under 5G-TSN architecture

CN116723551BCN 116723551 BCN116723551 BCN 116723551BCN-116723551-B

Abstract

The invention relates to a time delay guaranteeing method for cloud PLC business under a 5G-TSN architecture, which is characterized in that a business priority mapping function, a priority queue management function and a wireless resource scheduling function are added in a 5G-TSN network, the wireless resource priority distributing method for cloud PLC industrial control business comprises the steps of counting queue data quantity, feeding back wireless channel quality, calculating required wireless resources and distributing wireless resources, reducing 5G network time delay, reducing intermediate cables and equipment, expanding the moving range of equipment terminals, the cloud PLC business obtains priority resource distribution on a wireless air interface, the proposed algorithm can obtain lower time delay than an algorithm without providing guarantee under a multi-business mixed transmission scene, a virtual communication interface is flexibly connected with a plurality of protocols, the interconnection of the multi-equipment is supported, cloud cooperative control is realized, the production efficiency is improved, the 5G-TSN network simultaneously bears a plurality of businesses, a time delay deterministic guaranteeing manufacturer is provided for industrial control business, and the deployment complexity of an industrial field network is reduced.

Inventors

  • ZHANG YAN
  • SUN RUIQI
  • QIN DAWEI

Assignees

  • 鞍钢集团北京研究院有限公司

Dates

Publication Date
20260505
Application Date
20230731

Claims (5)

  1. 1.A time delay guaranteeing method for cloud PLC business under a 5G-TSN architecture is characterized by comprising the following steps: 1) When different service flows arrive at the base station, the base station firstly identifies different service flows according to the flow ID and maps the different service flows into different queues according to the priorities; 2) Queuing according to the time delay requirement of industrial control service flows, wherein the smaller the time delay requirement is, the more front a data packet is queued in the queue, the priority ranking is carried out on the industrial control service flows with different scanning periods and different time delay requirements, the scanning periods are from small to large, the time delay requirements are from high to low, and the priority ranking is carried out on the industrial control service flows with other priority queues by adopting the rule of FIFO; 3) The wireless resource scheduling function module is arranged in the 5G-TSN network, and the wireless resource priority allocation method for the cloud PLC industrial control service comprises the following steps: (1) Counting the data quantity of a queue, wherein the number of cloud PLC industrial control type service flows related in the current queue is n, and the number of data packets corresponding to the same industrial control type service flow i is Counting the number of the data packets by using the number of the data packets to count the number of the data packets in the queue ; (2) Feedback wireless channel quality the wireless channel quality indication corresponding to industrial control service flow i is Obtaining the number of bits carried by each resource block under the quality of the wireless channel according to the adaptive modulation and coding rule , The more feedback the better the wireless channel quality; (3) Calculating the required wireless resources, namely obtaining the bearing according to the wireless channel quality of different cloud PLC industrial control service flows Number of RBs required for individual packets , wherein, Is the length of the data packet, and thus the number of radio resources required to transmit the m data packets in the current queue can be obtained ; (4) When allocating radio resources on the air interface, firstly, the radio resources are allocated to the highest priority queue, and the total number of the radio resources which can be allocated in the transmission time interval TTI is : When (when) All data packets in the queues are allocated to corresponding wireless resources, and only after all data packets in the queue with the highest priority are allocated with resources, wireless resources are allocated to other queues; If it is The remaining time values of different data packets are compared and distributed , wherein, For the delay requirement value of the data packet, The time value that the data packet has been waiting for will be the remaining time value of all the data packets in the highest priority queue Resource allocation, remaining time value And if the radio resources are smaller, the resource allocation is preferentially performed until the current radio resources are completely allocated.
  2. 2. The time delay guaranteeing method for a cloud PLC service under a 5G-TSN architecture according to claim 1, wherein the 5G-TSN architecture for the cloud PLC service includes a cloud PLC, a video service, other data services, and a 5G-TSN network, and the cloud PLC, the video service, and the other data services are transmitted from a server to a client by the 5G-TSN network.
  3. 3. The time delay guaranteeing method for cloud PLC service under 5G-TSN architecture according to claim 1, wherein the 5G-TSN network includes a network side TSN converter NW-TT, a user plane function UPF, a service priority mapping, priority queue management, radio resource scheduling, a user terminal UE and a device side TSN converter, the cloud PLC, video service and other data service access the 5G core network through the user plane function UPF by using the network side TSN converter NW-TT, the service priority mapping, priority queue management and radio resource scheduling transmit the allocated resources to the user terminal UE, and the user terminal UE is connected with the device side TSN converter to provide a TSN egress port.
  4. 4. The method for guaranteeing time delay of cloud PLC service under 5G-TSN architecture according to claim 1, wherein when wireless resources are allocated, different service flows are marked with priority labels, the priority labels have a value of 0 and 1 as high priority, the priority label has a value of 2 or 3 or 4 as medium priority, and the priority label has a value of 5 or 6 or 7 as low priority.
  5. 5. The method for guaranteeing time delay of cloud PLC service under 5G-TSN architecture according to claim 1, wherein in the allocating radio resource, when service flow data of the same priority arrives for the same priority queue, queuing is performed according to time delay requirement of the service flow of the same priority, and the smaller the time delay requirement value, the more front the data packet of the service flow is.

Description

Time delay guaranteeing method for cloud PLC service under 5G-TSN architecture Technical Field The invention relates to the technical field of collaborative integration of 5G and industrial Internet, in particular to a time delay guaranteeing method for cloud PLC business under a 5G-TSN architecture. Background The cooperation and fusion of the 5G and the industrial Internet become a hot spot of current academic research, the 5G has low time delay and high reliable connection capability, the application of the 5G enabling industry becomes common demands of the communication world and the industry, however, the industrial service has extremely strict requirements on the performance of a bearing network, the bearing network of a factory not only needs to have low time delay, low jitter and high reliability capability, but also has deterministic characteristics, and for an industrial control system, deterministic time delay guarantee is a basis of safe and controllable system, so how to realize cooperative transmission of the 5G and TSN so as to improve the deterministic bearing capability of the 5G system becomes a key technical problem of the 5G deep enabling industrial core link. The time delay sensitive network (TSN, timeSensitiveNetworking) is a series of standard specifications formed by the enhancement of the IEEE802.1 working group aiming at the two-layer technologies such as time synchronization, resource management, traffic shaping, network configuration and the like on the basis of a standard Ethernet, the TSN has the functions of ensuring time delay guarantee and unified bearing capacity of multiple services on the technical level, on the basis of realizing high-precision time synchronization among all nodes in the TSN domain, the time trigger service flow end-to-end transmission time delay with strong real-time requirements and the limitation of jitter can be ensured, the 'one-network transmission' of non-real-time services and best effort services can be realized, the cooperation with heterogeneous industrial field communication protocols can be realized on the networking level by the TSN due to the compatibility with the standard Ethernet protocol, and the heterogeneous field communication protocols are compatible in the forward direction, however, the cable TSN network is difficult to meet the requirements of intelligent factory terminal access and data transmission requirements of the intelligent factory and the requirements of 5G and the intelligent factory on the basis of the wide use of intelligent terminals such as a large number of sensors in equipment, workshops and mobile robots on the production line, and the requirements of the intelligent factory driving requirements are more than 5G and are more than the requirements of intelligent factory. At present, the IT and OT fields provide concepts of cloud PLC, namely a programmable controller running at a cloud end, through standardization and application of cloud of a material connection port, the cloud PLC is directly communicated with an industrial Internet platform by adopting a software-defined PLC, remote control of the cloud PLC is achieved, the cloud PLC is enabled to be more flexible in deployment position, rapid creation, flexible migration, safe backup and other functions of industrial control tasks can be achieved, on one hand, the cloud PLC can be deployed on an industrial park MEC server, industrial control service data distribution is achieved at a 5GUPF, industrial control service data distribution is provided for a factory based on strong computing power of the MEC, on the other hand, the cloud PLC can further extend into a 5G network, sink to a 5GCU under the edge computing capability, on the basis of a 5GCU protocol stack is achieved on a universal architecture server, the cloud PLC is integrated with a distribution function, the cloud PLC is deployed, the industrial control service data distribution is achieved at the 5GCU, the communication link between the cloud PLC and industrial site controlled equipment is further shortened, on the other hand, how the industrial control service data of the cloud PLC is guaranteed to be the whole 5G-TSN network, the most influenced by transmission of the industrial control service data is guaranteed to be the most, and the problem of the cloud PLC is provided under the 5G-TSN, and the fact that the cloud service is based on the 5G is reliable, and the 5G is in the condition of the industrial control service is supported by the 5G network. Disclosure of Invention The invention provides a time delay guaranteeing method for cloud PLC service under a 5G-TSN architecture, which reduces the time delay of a 5G network, reduces intermediate cables and equipment, expands the moving range of equipment terminals, ensures that the cloud PLC service obtains priority resource allocation on wireless air interfaces, and under a multi-service mixed transmission scene, the proposed algorithm can obta