中文摘要：

基于IEEE802．11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％。

英文摘要：

IEEE 802. 1 1-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 fractionoriented 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%.