optimized mac protocols for wireless sensor networks

Abstract

Wireless Sensor Networks consist of numerous tiny nodes. All the sensor newlinenodes in the network are connected together in an ad hoc manner and also newlinecoordinate with each other thereby forming a network. Such networks have newlinethe ability to be self organized and failure-adaptive to provide an efficient and newlinereliable network. Wireless sensor networks have a wide variety of applications newlinesuch as intruder alert and tracking, environmental monitoring, industrial newlineprocess monitoring, and tactical systems. In general, sensor nodes are newlinedeployed in unmanned area. The sensor nodes have a limited coverage and communication range due to low power capacities compared with other mobile devices, so energizing the nodes is a very difficult process. The Medium Access Control (MAC) layer level concentrates on increasing the durability of the nodes and the energy consumption by the network newlineenergy. MAC protocols directly control the common module. It has a vital newlineimpact on the node s energy consumption. Majority of energy wastage in newlineWSN is occurred due to the interference of messages, over hearing, inactive listening, control packet overhead, and excess emitting. The main attributes of a good MAC protocols are energy efficiency, avoidance of collision,scalability, maximum throughput and adaptability. Contention-based (CBP) and schedule-based MAC protocols are the two classifications of WSN. The CBP MAC protocols are designed for minimum delay and maximum throughput. These protocols are not energy-efficient newlinebecause of inactive listening. But the design of the schedule-based protocols newlineis contention-free and it also assigns non-interference channels to a link after newlinedetecting the neighboring radios of each node. Many energy efficient MAC newlineprotocols have been developed since energy preservation is required at MAC newlinelayer level. The specified research analyses the protocols in the form of their newlineeffectiveness of energy. In order to enhance the energy conservation, the newlineprotocols exercise specific techniques and carry out the quality like newlineinformation tr