Study on Improved MAC Protocol in Wireless Sensor Network
BU Deng-hui · Jisuanji fangzhen · 2011
S-MAC is the most representative wireless sensor network protocol,the fixed duty cycle of S-MAC fails to adapt to the change of network traffic very well,and BEB backoff strategy brings unfairness.In order to prolong the network lifetim,an improved S-MAC protocol was put forward in this paper.The protocol improves the BEB backoff strategy,makes the entire network load balance and improves channel competition,then the adaptive duty cycle dynamic adjustment was used to adapt to network traffic,multiple data packet was sent in a working cycle to save energy costs..Lastly experiments are cayyied out in the NS2 network simulatio.platform.The simulation results show that the improved S-MAC protocol improves network throughput and saves more energy,and the wireless sensor network lifetime is prolonged.