Research On Network Scheduling Method For Convergence Of Industrial Wireless And TSN

In the current industrial scenario,different industrial manufacturing workshops have different requirements for network protocols due to different production properties.Therefore,it is necessary to select different networks for deployment according to the communication needs of different production workshops,so as to achieve the rational use of network resources.The network integrating wired and wireless protocols can achieve the integration of the entire industrial network,promote the information of data management and meet the needs of intelligent manufacturing.At present,the research on the industrial wireless network and wired network mainly focuses on their own,and the research on the converged network is relatively rare.In order to achieve the unified scheduling management of data transmission between different network devices,it is urgent to carry out research on the converged network scheduling mechanism to solve the problem that the system performs cross-network transmission scheduling of traffic according to the end-toend data transmission requirements.In view of the problems existing in the current development process of the abovementioned industrial wireless and wired converged networks,this thesis designs a crossnetwork scheduling method for the converged industrial wireless networks and TSN and implements it.The main research work is as follows:1.This thesis studies the scheduling status of industrial wireless networks,TimeSensitive Networking and converged networks,analyzes the current standards of industrial wireless networks and Time-Sensitive Networking,and studies the scheduling technology of industrial wireless networks and Time-Sensitive Networking.The design of the scheme lays the theoretical foundation.2.Aiming at the real-time requirements of end-to-end data transmission in converged networks,based on the converged network architecture of industrial wireless network data flow transmission across TSN,a scheduling method for industrial wireless network data flow across TSN transmission is proposed.According to the end-to-end priority and delay requirements,the priority of data flow transmission on the wireless side and the TSN side is obtained through the mapping table,and then the scheduling scheme is designed according to the priority of the wireless side and the TSN side.On the wireless side,a time slot channel resource scheduling method based on different scheduling constraints is designed;on the TSN side,a frame transmission window scheduling algorithm with greedy time slot allocation is designed.3.This thesis builds a network test and verification platform for the integration of WIA-PA and TSN,and tests the scheduling methods on the wireless network side and TSN side respectively,and verifies the feasibility of the scheduling scheme.By testing the transmission performance of the fusion network,the results show that after the fusion network adopts the scheduling scheme proposed in this thesis,the end-to-end average transmission delay is reduced to less than 40 ms,and the jitter is reduced to less than 1 ms.Comparing the proposed scheme in this thesis with the scheduling scheme proposed in TSIPA,it can be found that the scheduling scheme proposed in this thesis is more optimized.To sum up,the scheduling scheme proposed in this thesis can reduce the average end-toend transmission delay and jitter of the converged network,and can effectively improve the real-time performance of end-to-end data stream transmission.