改进型WSN分布式TDMA调度协议

Improved Distributed TDMA Scheduling Protocol for Wireless Sensor Network

无线传感器网络以汇聚型数据传输应用为主,多采用树型拓扑结构。根据该特征,提出一种改进型分布式时分复用调度协议,该协议依据节点距离sink的最小跳数和最大剩余能量建立树型拓扑,其分配算法分别采用临近最大值和跳数排序法。分析及仿真实验结果表明,采用这2种算法的改进型调度协议能有效降低数据传输时延和能耗。

The dominant traffic in a Wireless Sensor Network（WSN） is converge-cast, and a WSN usually adopts tree-type topology to ease data gathering. Owing of these characteristics, this paper presents an improved distributed Time Division Multiple Acccss（TDMA） scheduling protocol. This protocol builds a spanning tree topology for a WSN in terms of minimum hops to sink or maximal residual energy, and then propose a Near Maximum slot number Method（NMM） and Hop-based Ordering Method（HOM） for slot allocation. Analysis and simulation results show that the protocol adopting either algorithm decreases the data delay and the energy consumption.