CQCF: A Cyclic Queuing Cluster Forwarding Based Transmission Mechanism for Large-Scale Deterministic Network

With the increase of time-sensitive applications, the traditional networks using Best Effort approach can no longer meet the needs of the network applications. For satisfying the demand for high-quality, low delay, and low jitter transmission, IETF establishes the TSN and DetNet Working Group. However, there is no DetNet mechanism specifically designed for time synchronization scenarios. In this paper, we propose a time synchronization cross-domain transmission mechanism for a large-scale Deterministic Network, which is named CQCF (Cyclic Queuing Cluster Forwarding). CQCF adopts the queuing cluster module to cache and forward time-sensitive traffic, making sure that packets can be received at the specified time. Meanwhile, we propose the mapping principle on the Cycle and Hypercycle between access networks and core networks to improve the feasibility of cross-domain transmission. The experimental results show that the CQCF mechanism can schedule more flows than DIP under the time synchronization scenario. The runtime of the scheduling algorithm using CQCF improves by 27.9% compared with the algorithm using DIP under scheduling 2000 flows.