Research On The Wireless Sensor Network Technology Of Train's State

With the development of modern seience and technology,the wireless sensor network integrated of sensor technology,information processing and network communication technology is emerged.Wireless sensor network,which is composed with a plenty of small network nodes.It can implement the data collection,date processing and the application of transmission.It is a new development area of modern information technology in which has a broad development space and application prospect.China's development of high-speed railway, train status information to monitor the management of the railway has gradually become an important part at present.Select Zigbee as the need for a special train compartments within the space environment and the unique network topology of the network architecture.First of all, this papers analysis of wireless sensor network system development, train communication network of research and application profile from country and abroad.The existing IEEE 802.15.4 based on the Zigbee protocol analysis,and summary of its technical characteristics,combined with the application of research targeted at small space, low-speed, low power, and other characteristics are optimized to meet the train compartments of the unique environment of demand for network protocol stack design model.Binding protocol stack model gives a more complete Zigbee network processes, including the network found that the correlation process, basic routing method and its processes.Determine the design of hardware and software environment of protocol stack, and design the interface of Zigbee protocol stack, and so on.The establishment of a model which based on the train compartments, the environment Zigbee platform for network monitoring systems. Has been set up in the underlying hardware platform and on the basis of the agreement, for train compartments, the characteristics of the scene, the scene of a reasonable set of model.Use NS-2 simulation software simulation of a train compartment in the wireless sensor network topology, and gives the formation of the network, network address assignment and the specific message routing process.