Study on Multiple Address Access in Wireless Sensor Networks
|School||Xi'an University of Electronic Science and Technology|
|Keywords||Wireless Sensor Network MAC TDMA clusters|
Wireless sensor network normally consists of a large number of distributed nodes that organize themselves into a multi-hop wireless network. Each node has one sensor, embedded processors and low-power radio, and is normally battery operated. These nodes collaborate to accomplish a common task and are normally battery operated. Because of this, Sensors have limited energy resources and their functionality continues until their energy is drained. Therefore, energy for sensor networks should be managed carefully to extend the lifetime of sensor networks. After a sensor probes the surrounding environment and performing signal processing of the observed data, sensors communicate this data, using a radio-based short links, to a cluster head or to a base station. For sending sensed data, a sensor node has to access the medium and then transmit the data. Thus, in a distributed system like wireless sensor network, medium access control (MAC) protocol plays an important role.This thesis is organized as follows:Based on the basic concept of the wireless sensor networks, this paper analysis and study the cluster network protocol.Based on the analysis of the characters of the wireless sensor networks, a TDMA-based new design of rotation of the cluster heads is advanced.NS2 is used to set up the simulation model and the performance of the protocol of the new design and others are simulated and compared. Simulations show that the energy- efficiency of the new design is better than the others. By comparing to LEACH in the area of control overhead, the new design is better, too.