一种基于跨层设计的无线传感器网络自适应概率广播策略

针对盲目泛洪带来的广播风暴问题,提出了一种基于跨层设计的无线传感器网络自适应概率广播策略(APBCL).APBCL通过MAC层接收信号的强度估算发送节点和接收节点的距离,根据距离计算出转发分组的概率.APBCL减少了分组在网络中的重复传输,降低节点间的竞争和碰撞.仿真实验表明:相比泛洪和概率泛洪,APBCL在不牺牲网络吞吐率的前提下,提高了转播节省率,降低了平均端对端延迟和节点平均丢包率.

An Adaptive Probabilistic Broadcasting Strategy Based on Cross-Layer Design for Wireless Sensor Network

To alleviate the broadcast storm problem caused by blind flooding, an adaptive probabilistic broadcasting strategy based on cross-layer design for wireless sensor networks(APBCL) is proposed. The distance between the sender and the receiver is estimated by the received signal power at the MAC layer in APBCL, which is applied to adaptively adjust the rebroadcasting probability. APBCL reduces the redundant retransmission and the chance of the contention and collision among neighboring nodes in the networks. The simulation results demonstrate that APBCL improves saved rebroadcast and reduces the average packet drop fraction and average end-to-end delay compared against the blind flooding and fixed probabilistic flooding at the expense of a little throughput.