REA-MAC:A low latency routing-enhanced asynchronous duty-cycle MAC protocol for wireless sensor networks  

作　　者：唐宏伟 曹建农 孙彩霞 卢凯 

机构地区：[1]College of Computer Science,National University of Defense Technology [2]Department of Computing,Hong Kong Polytechnic University

出　　处：《Journal of Central South University》2013年第3期678-687,共10页中南大学学报（英文版）

基　　金：Projects(61103011,61170261) supported by the National Natural Science Foundation of China

摘　　要：Many energy efficiency asynchronous duty-cycle MAC(media access control) protocols have been proposed in recent years.However,in these protocols,wireless sensor nodes almost choose their wakeup time randomly during the operational cycle,which results in the packet delivery latency increased significantly on the multiple hops path.To reduce the packet delivery latency on multi-hop path and energy waste of the sender's idle listening,a new low latency routing-enhanced asynchronous duty-cycle MAC protocol was presented,called REA-MAC.In REA-MAC,each sensor node decided when it waked up to send the beacon based on cross-layer routing information.Furthermore,the sender adaptively waked up based on the relationship between the transmission request time and the wakeup time of its next hop node.The simulation results show that REA-MAC reduces delivery latency by 60% compared to RI-MAC and reduces 8.77% power consumption on average.Under heavy traffic,REA-MAC's throughput is 1.48 times of RI-MAC's.Many energy efficiency asynchronous duty-cycle MAC （media access control） protocols have been proposed in recent years. However, in these protocols, wireless sensor nodes almost choose their wakeup time randomly during the operational cycle, which results in the packet delivery latency increased significantly on the multiple hops path. To reduce the packet delivery latency on multi-hop path and energy waste of the sender＇s idle listening, a new low latency routing-enhanced asynchronous duty-cycle MAC protocol was presented, called REA-MAC. In REA-MAC, each sensor node decided when it waked up to send the beacon based on cross-layer routing information. Furthermore, the sender adaptively waked up based on the relationship between the transmission request time and the wakeup time of its next hop node. The simulation results show that REA-MAC reduces delivery latency by 60% compared to RI-MAC and reduces 8.77% power consumption on average. Under heavy traffic, REA-MAC＇s throughput is 1.48 times of RI-MAC＇s.

关 键 词：wireless sensor networks ASYNCHRONOUS duty-cycle media access control protocol idle listening low latency 

分 类 号：TN929.5[电子电信—通信与信息系统] TP212.9[电子电信—信息与通信工程]