TDMC:长距离无线MESH网络中面向流量比的动态多信道MAC协议

摘要

基于IEEE 802.11的长距离无线mesh网络(LDmesh)是一种远距离无线传输技术.目前,在LDmesh中的研究热点是基于TDMA的MAC协议.现有的单信道MAC协议存在链路利用率低的问题,多信道MAC协议缺少一种可行的方案.设计一种分布式的、实时的、面向流量比的动态多信道MAC协议(TDMC).TDMC以实时流量比作为依据,遵循提出的信道分配规则,使用一种可行的划分区间法动态分配信道.仿真结果表明:TDMC的性能显著优于JazzyMac;中等负载时TDMC性能比静态多信道协议优15％- 54％.%IEEE 802. 11-based long-distance wireless mesh networks (Ldmesh) is a long-distance wireless transmission technology. Recently, TDMA-based MAC protocol becomes the focusing topic in Ldmesh. Existing single-channel MAC protocol has the problem of low link utilization and there is no feasible multi-channel MAC protocol. This paper presents TDMC, a distributed, real-time, traffic fraction-oriented dynamic multi-channel MAC protocol. TDMC is based on real-time traffic fraction, follows the proposed channel allocation rules and uses a viable division interval method for dynamic allocation of channels. Simulation results show; TDMC performance is significantly better than JazzyMac. When we use the medium load, TDMC performs better than the static multi-channel protocol by 15% -54%.