Research In Wireless Sensor Network

With the rapid development of the technology on MEMS (Micro-Electronics-Mechanism System) , sensor ,embedded system, network and wireless communication, the wireless sensor networks (WSN)technology has been put to the highest point of research. The WSN is consisted by many nodes which have sense, computing, communicating abilities and connects nodes by wireless link in a self_organized way. The widely use of WSN enhances the interfusing of physical world and information world; consequently, people can investigate and observe the micro and macro world expediently.In this paper, We designed a embedded gateway ,basing on Ethernut object, which connects two wireless sensor networks sink nodes, the sinks exchange message packets in wireless channel using IEEE 802.154-based MAC. While the Gateway exchange packets with the Ethernet by CAT5 cable. So, User can post request for sensor data on internet which connect the gateway by Ethernet. This design can enjoy the POE (Power over Ethernet) technology and provide electric power for gateway and sinks.We design a topology structure with a Double-sink structure, which gives us a way to address nodes in wireless sensor network. Furthermore, we give the Algorithm for it.Basing on the double-sink structure ,we design a Cluster Tree based Energy Optimization Routing(CTEOR) .At last ,we use OPNET, which provide a unique virtual network environment, predicting the behavior of networks, applications, and servers to plan for change, growth, and new application and service deployment.