The Research On Cluster-Based Energy-Saving Algorithm For Wireless Sensor Network

Wireless sensor networks(WSN), which is made by the convergence of sensor, nested computation, networks and wireless communication technologies, is a novel technology about acquiring and processing information It is a late-model wireless network of infrastructure less network and can be used for testing, sensing, collecting and processing information of monitored object WSN is a new research area of computer science and technology and has a wide application future. Both academia and industries are very interested in it.First, we give a summary of wireless sensor network; analyze and compare some routing protocols in the network layer that satisfy the features of WSN, such as limited communication ability, limited resources and mobile network etc. Protocols based on clustering can alleviate the influence caused by the moving of some nodes, reduce the spending in routing discovery, and accelerate finding the route. In addition, adopting the route based on clustering can reduce the number of nodes participating in calculation and the size of routing list, which can reduce the spending of communication and maintain the memory spending. In large wireless sensor network, clustering is a preferable choice.We propose an energy-efficient, distributed communication protocol. The new protocol organizes the sensor nodes into clusters. These clusters are circle fields that centers are respective cluster heads Member nodes in intra-cluster coordination transmit perceptive data to their cluster heads that are responsible for fusion. In inter-cluster coordination, gateways that belong to two or more clusters connect adjoining cluster heads, which build up a multi-hop routing. To optimize cluster heads choosing gateways, the new protocol introduces weight W that consider both the distance from cluster head to the base station (BS) and the residual energy of cluster head The base station assigns each cluster head a mark When one cluster head transmits the data to its adjoining cluster head, it will consider both the mark of adjoining cluster heads and the residual energy of gateways, which can help to choose an optimized local routing to transmit data to the next adjoining cluster head This next cluster head chooses a routing uniformly, which form a multi-hop routing from cluster heads to the BS gradually. The main idea of the new protocol is to connect the adjoining cluster heads through gateways and choose appropriate gateways, which can balance the consumption of every sensor node and further the lifetime of the whole network We get optimal parameters by theory analysis and simulation and contrast the new protocol with traditional cluster-based routing protocol in energy dissipation Results prove that the new protocol has superiority in energy efficiency.