TAMCQF: Hybrid Traffic Scheduling Mechanism Integrating TAS and Multi-CQF in TSN
Hongrui Nie, Shaosheng Li, Yong Liu · 2023
Time-sensitive networking (TSN) is considered one of the most promising solutions to address hybrid traffic scheduling. The TSN working group proposed various shaping mechanisms (e.g., time-aware shaper (TAS), credit-based shaper (CBS), and cyclic queuing and forwarding (CQF)). However, scheduling hybrid traffic with different quality of service (QoS) requirements is still not effectively solved, since QoS requirements are hard to meet by standalone mechanism or combined mechanisms with fixed time slot divisions. In this paper, we propose a TAMCQF model to achieve deterministic hybrid traffic scheduling. We formally define the problem of configuring TAMCQF-based networks with different scheduling constraints and time slot division granularity. We develop a mixed linear programming formulation (MILP) and solve it with a state-of-the-art ILP solver. The simulation results show that TAMCQF can achieve zero jitter that TAMCQF can achieve zero jitter for TT traffic compared to CQF and reduce time cost by 103× level when handling over 250 hybrid flows compared to TAS.