The Research On The Optimization Of Routing Protocol In Wireless Sensor Networks

Due to its low price, convenience of the deployment methods, Wireless sensor networks are being increasingly widely studied and used. The biggest drawback of wireless sensor network is that nodes have very limited energy, storage space and computing ability. Large-scale data acquisition may bring the danger of congestion in the condition of limited hardware limits, cause large consumptions of nodes or even network paralysis. These problems make the reliability of data transmissions in wireless sensor network under great restriction. In this paper, routing algorithm is the research object. Together with energy consumption of sensor node and Communication reliability, the theme pays attention to optimize and improve it, in order to increase the effective working time network.The main contents of the thesis are as follows:1. On the basic of the comparative analysis of existing wireless sensor network routing protocols and algorithms, combination of network characteristics, the characteristics of routing protocols for wireless sensor network and design requirements are summarized.2. According to the research of AODV routing protocol and improved algorithms for wireless sensor networks, this paper proposed energy-efficient and reliable routing protocol based on AODV for wireless sensor networks. The agreement introduces restrictions on broadcast mechanism to solve the AODV routing protocol broadcast storm problem, and saves the energy consumption of node. Simultaneously, In the routing process, link quality, residual energy, congestion of node are all adopted as routing measure to provide a high efficient routing policy.3. Based on the research of LEACH routing protocol and improved algorithms for wireless sensor networks, this paper proposes energy balance sub-cluster routing protocol for wireless sensor networks based on ant colony algorithm. The algorithm improves the election of cluster head of network nodes. Furthermore, the ant colony algorithm is introduced into the algorithm, with establishment of multi-hop routing between cluster heads, using multi-hop communications to the base station transmit data. The algorithm can effectively extend the network lifetime, and saves network energy consumption to achieve network load balancing.4. ZigBee routing protocol for wireless sensor networks is studied. On the basic of the analysis of star schema, mesh structure and cluster tree network topology, the paper proposes improvement program.The Network simulator is selected as to create simulation environment. The results of simulation shows that the improved algorithm balances the energy of the entire network, effectively extends the system life.