Time-triggered Ethernet Key Technology Research

Time-triggered Ethernet is a new Ethernet network communication technology that mixes time and event services.Compared with traditional Ethernet,time-triggered Ethernet improves network resource utilization efficiency.Firstly,this paper proposes a TTE offline periodic schedule design method based on response constraint and its software implementation.Because the traditional offline schedule design does not consider the problem of TT traffic response constraints under the further refinement of TT traffic,this paper introduces TT response constraints based on the existing hybrid traffic partition scheduling strategy,and Table generation method is designed for offline scheduling of TTE networks with response constraints.At the same time,the network traffic information is first synthesized and combined,and the strategy of different terminal node scheduling tables is refined,and the scheduling table generation method is simplified.The offline scheduling table generation software is designed,and the rationality of the periodic schedule generation under the scheme is verified by an example.Secondly,aiming at the design problem of TTE scheduling method,this paper proposes a TTE scheduling method based on adaptive dual redundancy.The traditional redundant link switches when it fails,which will cause certain overhead and delay.The adaptive dual redundant network structure proposed in this paper can solve the problem of high real-time requirements of TTE network services.In addition,based on the deterministic network analysis method,the closed delay bounds of the RC stream under the adaptive double redundant scheduling method are derived,and the simulation results verify the effect of the proposed method to reduce the network delay.Finally,this paper builds a TTE demonstration verification platform for high speed and high reliability transmission.It realizes the transmission of commands and video data,real-time playback of video data,and monitor the transmission rate,delay and jitter of the data stream in real time at the receiving end.