摘要： 提出一种应用于无线传感器网络的流量自适应混合介质访问控制协议(THMAC)。结合TDMA与CSMA的优势，通过预测机制跟踪网络负载和冲突变化情况，在不同负载下选择合适的信道访问方式，实现CSMA与TDMA的自适应混合，在降低数据冲突概率的同时尽力保持较高的信道利用率。仿真结果表明，THMAC在多竞争节点的情况下，能够有效降低数据冲突率，维持较高的吞吐率。

关键词: 无线传感器网络, 介质访问控制协议, 流量

Abstract: This paper proposes a Traffic-adaptive Hybrid MAC(THMAC) protocol for wireless sensor networks. THMAC combines the advantages of TDMA and CSMA, tracks the situation of traffic and collision through forecasting mechanism, which lets node choice different channel access mode under different load, and efforts to achieve the adaptive mixed of CSMA and TDMA, which reduces the probability of data conflicting while striving to maintain higher channel utilization. Simulation results show that the THMAC can effectively lower the network data conflicting rate, and maintains a higher throughput when the number of contenders changes.

Key words: wireless sensor networks, MAC protocol, traffic

中图分类号: 

• TP393.03