| As a result of the combination of low power computing, wireless communication and microsensor technology, wireless sensor networks have become an active branch of the researches in computer science. Among these studies, research against the routing protocols is a hotspot, because it will have a direct influence on the working level and the practicability of the wireless sensor networks.This paper analyzes the routing protocols of wireless sensor networks and finds that the cluster-based routing protocols are convenience in topology management, energy-efficient and easy for data aggregation, and therefore have become the emphases of the researches in wireless sensor networks at present. However, through the researches against the cluster-based routing protocols represented by LEACH and MRPS, we find that the persormance of the cluster-based protocols is needed to be improved. On this basis, we propose a cell-based cluster routing protocol with monitoring node, which comprehensively considered factors such as load-balanced of network, multi-hops, dendity of nodes, energy of nodes left, data aggregation and so on. This protocol clusters the monitoring district into fixed cells by the sink node whose energy can be recharged in a centralized way. A cell is considered as a cluster, and every cluster has a monitoring node in charge of querring the status of the cluster head at scheduled time and presiding the electing of the cluster head in a distributed way, avoiding the energy consumption in the phase of cluster forming every round.This paper describes the proposed protocol in detail and gives a theoretical analysis on the performance of the proposed protocol. We also make a simulation experiment on the NS2 (Network Simulator 2nd) platform, both of the theoretical analysis and the experiment result demonstrate that the proposed protocol prolongs the lifetime of the network comparing with LEACH protocol and MRPS protocol and has a great use value. |
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