Based On Wireless Sensor Network Mac Protocol Research

Sensor technology, micro-electromechanical systems, networks and wireless communication, and other technological advances, and promote the emergence and development of wireless sensor networks. Random distribution of a large number of sensor nodes in wireless ad-hoc manner since a network of nodes, embedded through the various types of sensors to gather the data information of the external environment surrounding the voice, video, temperature, humidity, pressure and seismic waves etc; then the data collected will be transmitted to the data center through the wireless short distance, low-loss, multi-hop communications.Wireless sensor networks have attracted the military, business, academic seriously, it has been foreseen in the military, the environment, medical treatment, space exploration, disaster rescue, transport and marine monitoring, and other special areas and have a wide range of uses and applications.Wireless sensor networks is a new technology, foreign research of wireless sensors are developing speedly , domestic wireless sensor network research is still in its infancy, but the domestic and international level gap is not very large, for this timely forward for technology research for the entire country's national defense, political, economy will be a major strategic significance.The energy, computing power, storage capability, communications capability and other resources of the single sensor node are very limited; and wireless sensor networks possess the characteristics of self- organization, expansionary, large number of nodes and dynamic development etc. There existing a great many of hot areas of research in the field of wireless sensor networks; and in this work we mostly concentrated on the Mac protocol of the wireless sensor networks for research, first introduced the existing Mac protocols, such as : IEEE802.11, S-MAC protocol, Pamas protocol, moreover analysed and made the comparison of them. Wireless sensors Mac protocol should be designed as a primary objective to conserve energy The existing Mac protocol generally seek balance in the energy and delay and obtain energy savings in the cost of increasing the network delay,...