Cooperative Scheduling of PON Domain and TSN Domain for Global Optimization of E2E Time-Sensitive Industrial Flows

The Industrial Internet typically employs Time Sensitive Networking (TSN) to address the issue of deterministic transmission for time-sensitive (TS) industrial applications. However, due to the limited number of TSN switch ports, deploying more switches in a large-scale network can result in increased costs and complex network configurations. To reduce overall cost and complexity, low-cost and high-bandwidth time division multiplexing passive optical networks (TDM-PONs) can be used to replace some aggregation TSN switches, thus a hybrid PON and TSN networking will become a possible solution for Industrial Internet. Nevertheless, this approach will also bring challenges for scheduling end-to-end TS industrial flows across both TSN and PON domains. To this end, we propose an optical TSN (OTSN), a TSN equivalent model of TDM-PON that enables the co-scheduling of TS flows across heterogeneous network domains (i.e., TSN and PON domains). Simulation results show that the schedulability of the co-scheduling strategy is 25% higher than that of the non-cooperative one.