适用于多跳TSN网络节点的帧抢占分片与重组方法  

Frame Preemption Fragmentation and Reassembly Method Suitable for Multihop TSN Network Node

作　　者：陈南洋[1,2] 陈岩 陈东[1] 张斌[1] 吴海涛[1,2] 梁文婷 CHEN Nanyang;CHEN Yan;CHEN Dong;ZHANG Bin;WU Haitao;LIANG Wenting(No.30 Institute of CETC,Chengdu Sichuan 610041,China;China Electronic Technology Cyber Security Co.,Ltd.,Chengdu Sichuan 610041,China)

机构地区：[1]中国电子科技集团公司第三十研究所,四川成都610041 [2]中国电子科技网络信息安全有限公司,四川成都610041

出　　处：《通信技术》2024年第4期379-385,共7页Communications Technology

基　　金：四川省科技计划(2022YFG0021)。

摘　　要：当前标准时间敏感网络中,帧抢占分片与重组机制仅适用于网络节点间。而可抢占帧在多跳时间敏感网络传输过程中,可能会多次出现帧抢占分片与重组,导致网络节点处理开销增加及转发效率降低的问题。设计了一种适用于多跳时间敏感网络节点传输的帧抢占分片与重组方法,通过择机分片、增加以太网地址、一次分片与重组、分片大小适当、保护带长度折中等措施,可减少多次帧抢占分片与重组带来的开销,提高网络节点转发效率,降低时间敏感流的时延和抖动,保障其传输时延的确定性。In current standard TSN(Time-Sensitive Networks),the frame preemption fragmentation and reassembly mechanism applies only between network nodes.However,preemptible frames may be fragmented and reassembled multiple times during the transmission process in a multi-hop TSN,which can lead to increased processing costs and reduced forwarding efficiency for network nodes.A frame preemption fragmentation and reassembly method suitable for multi-hop TSN node transmission is designed,which can reduce the cost of multiple frame preemption fragmentation and reassembly,improve the forwarding efficiency of network nodes,reduce the delay and jitter of time sensitive data,and ensure the determinacy of their transmission delay through the measures of timing fragmentation,increasing MAC addresses,onetime fragmentation and reassembly,appropriate fragmentation size,and compromising the length of guard band,etc.

关 键 词：时间敏感网络 帧抢占 分片与重组 网络节点 MAC合并 

分 类 号：TN919.21[电子电信—通信与信息系统]