基于无线传感器网络的分布式时分多址调度策略

Distributed time division multiple access scheduling strategy for wireless sensor networks

针对周期汇报型无线传感器网络(WSN)中数据量大而导致的无线信号冲突概率高的问题,提出了一种分布式的时分多址调度策略(DTSS)。该策略采用了一种分布式的竞争算法来构建节点的时隙调度表,即每个节点根据自身搜集到的信息来决定下一跳目的节点,并和其他节点竞争传输时隙。所有节点完成时隙调度表的建立后,节点在每个数据采集周期根据自己的工作时隙调度表发送和接收数据。仿真结果表明,该策略避免了节点无线信号的冲突,降低了节点能耗,延长了网络生命周期。

In a periodic report Wireless Sensor Network （WSN）, heavy data traffic very easily leads to serious transmission collisions. This paper proposed a distributed Time Division Multiple Access （TDMA） scheduling strategy, called DTSS, to construct an appropriate transmission schedule that avoided transmission collisions. DTSS took advantage of a distributed competitive algorithm to build the transmission schedule. Each node selected its next-hop forwarding node and competed for a transmission time slot with its contending nodes. After the construction of the schedule, the nodes sent and received the data according to the schedule. The simulation results confirm DTSS avoids transmission collisions, decreases the energy consumption of nodes and significantly improves the network lifetime.