可靠的无线传感器网络分簇协议研究

Research on Reliable Cluster Protocol in Wireless Sensor Network

摘要: 本文在LEACH协议的基础上提出了基于丢包率度量设计的可靠的LEACH协议。首先假设无线链路信道是不可靠的，存在一定的概率会丢失数据包。为了估计结点的丢包率，在每轮数据传输过程中，当前统计的目标节点的丢包率将通过迭代公式进行动态更新。在此基础上建立对邻居节点的信任模型。在此条件下引入被选择头结点的丢包率并结合距离因素作为选择簇头的判定依据。最终可提高网络数据的整体成功发送的比率，减少因数据包重发而消耗节点的额外能量，从而达到网络节能和提高数据传输效率的目的。

Abstract: On the basis of LEACH protocol, this paper puts a reliable LEACH protocol based on packet loss rate measurement. Firstly, it is assumed that wireless link channel is not reliable, and there is a certain probability that the packet will be lost. In order to estimate node packet loss rate, in each round of data transmission, according to the current statistics of a target node, we iteratively update packet loss rate, then model trust of neighbor nodes. Under this condition, the packet loss rate of a selected head node is estimated and the distance is also used to select a cluster head. Finally, simulation shows that our scheme can improve the holistic successful transmission rate of network data, and reduce the additional energy of the node due to the packet retransmission, thus achieve the purpose of saving network energy and improving the data transmission efficiency.