一种能量延时优化的无线传感器网络信息分发策略

Information Dissemination Strategy for Energy and Delay Optimization in Wireless Sensor Networks

研究无线传感网络中的信息分发问题,结合复杂动态网络信息传播模型理论,提出一种能量和延时优化的信息分发策略(energy and delay opti mizedinformation dissemination strategy,EDOIDS)。该算法无需节点定位信息和网络拓扑信息,立足信息传播逐步向外扩展的动力学特性,利用接收节点的接收端信号功率强度指示(RSSI)估计接收节点与发送节点的相对距离,建立节点转发优先级,确定MAC层转发时延。该算法在最大化覆盖新区域的同时能够有效降低碰撞,缩短整个系统的传播时延,同时,通过MAC层的监听机制以及复杂网络谣言传播理论,控制节点的转发权,抑制冗余,降低能耗。

This paper addressed the information dissemination issue over wireless sensor networks.Based on the information propagation model of complex dynamic networks,an energy and delay optimized information dissemination strate-gy（EDOIDS）was proposed for wireless sensor networks,which didn＇t need the location information and topology information.By using the dynamics characteristic that the process of propagation grows outside with time from the source of information,and the received signals strength indication（RSSI）,the algorithm evaluates the relative distances between senders and receivers,and decides forwarding priorities of nodes and time delay of MAC.The algorithm ensures the maximum coverage of new area,avoids effectively the collision of nodes and optimizes the delay of the whole network.Meanwhile,a joint of the listening mechanism of MAC with rumor spreading idea is used for controlling the forwarding priorities of nodes,restraining the redundant flooding packets and minimizing the energy consumption.