Optimization on Architecture of Time-Sensitive Software-Defined Network

Time-sensitive software-defined network (TSSDN) not only have the networking flexibility of software-defined network (SDN), but also have the advantages of time-sensitive network (TSN). This technology provides real-time guarantees for time-triggered traffic in time-sensitive systems by limiting nondeterministic queuing delays for time-sensitive traffic. However, the effectiveness of some low-latency indirect paths may be affected when network topology changed if the information of network device changes cannot be delivered in a timely and reliable manner, and then the performance and reliability of the entire network will be affected. Therefore, we first discuss and summarize the integration issues of TSN and SDN in the control plane, focus on outlining the architectural differences of existing designs especially. Then we propose a scheme to build the control plane over TSN. The advantage is this scheme can improve the unreliable transmission problem of network performance and the reliability related information by using the characteristics of TSN, such as low delay and high reliability. We summarize our scheme as fully time-sensitive software-defined network (FTSSDN) and elaborate on each functional level. Another proposal also been raised to replace all non-TSN devices working in the forwarding plane with TSN capable devices to avoid the occurrence of nondeterministic connections.