摘要： 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。

关键词: 时分复用, 树型拓扑, 分布式调度, 无线传感器网络

Abstract: 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 Access(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.

Key words: Time Division Multiple Access(TDMA), tree topology, distributed scheduling, Wireless Sensor Network(WSN)

中图分类号: 

• N945