关键词: 无线传感器网络, 多汇聚节点, 数据融合, 定时机制, 网络生存期, 传输延迟

Abstract: Considering data aggregation can greatly improve the performance of network lifetime in the routing protocol of wireless sensor networks, but it will bring some problems, such as decreasing network reliability and increasing data transmission delay. In this paper, a new data aggregation algorithm ECLT is designed for balancing energy consumption and transmission delay. It can adjust the original routing information by using the two stage fuzzy comprehensive evaluation, and increase overlap between the data transmission path, in order to improve the degree of data aggregation and prolong the network lifetime. At the same time, the timing mechanism of data aggregation also can be dynamically adjusted according to sensor node’s state in the process of forwarding data, thereby balancing the energy consumption of all the nodes in the network and reducing the data transmission delay. By means of simulating in OMNeT++, the algorithm ECLT can greatly extend the service life of wireless sensor networks and reduce the average transmission delay.

Key words: wireless sensor networks, multi-sink, data aggregation, timing mechanism, network lifetime, transmission delay