基于簇的无线传感网络流量负载的时隙调度协议*

针对大规模的无线传感器网络MAC协议在能量有效、低延时等方面的不足,提出一种基于簇的自适应时隙调度协议（ATSP）。整个网络由一些较小单位的簇组成，在每个簇内构造一棵数据聚集树，根据数据聚集树对节点每轮需要发送的数据流量进行加权，决定该节点的时隙大小；然后由簇头动态调节簇内节点时隙更新频率和顺序，可以降低时隙划分的能量和时间代价，减少节点的空闲侦听时间，避免串音。仿真表明,该协议有效地提高了网络能量有效性,延长了网络生存周期，降低数据包的延时。

Traffic load aware time-slot scheduling protocol based on clustering for wireless sensor networks

Taking account of the drawbacks in energy efficient and low-latency of the most of large-scale wireless sensor MAC protocols,the paper presented ATSP based on clustering.ATSP divided the entire network into some clusters, the protocol constructed a data gathering tree in each cluster. Each round, the cluster head adjusted the time-slot of nodes according to their weighted traffic load in a proper order and frequency,reduced thus the idle listening, and achieved the energy consumption balancing among nodes with a low latency. Simulation results show that the protocol can meet the system requirements in reliability, real-time response and energy efficiency.