Dynamic Per-Flow Queues in Shared Buffer TSN Switches

• DOI: 10.1145/3718087
• Publication Date: 2025-02-19T11:19:52Z
• Authors: Wenxue Wu; Tong Zhang; Zhen Li; Xiaoqin Feng; Liwei Zhang; Fengyuan Ren
• Keywords: Buffer (optical fiber)

Time-Sensitive Networking (TSN), as an enhancement based on Ethernet, can ensure deterministic traffic transmission with low delays and minimal jitters. However, TSN switches have only eight priority queues inherited from Ethernet at each egress port, which limits the flexibility efficiency of scheduling, well support for developing management mechanisms. Although per-flow boost scheduling Quality Service (QoS), static hardware in are considered unpratical due to resource limits. In this paper, we leverage limitation buffer size number concurrent flows shared design Dynamic Per-Flow Queues (DFQ). DFQ maintains a fixed virtual determined by dynamically manages mapping between active provide capability queueing. By constructing Flow Mapping Table (FMT) content-addressable memory (or hash bucket), quickly match, create, recycle multiplex limited switch resource. We prototype FPGA evaluate its performance different scenarios. Experimental results show that decrease overhead isolation impact delay throughput, indicating is effective solution.