A Low Delay MAC Protocol Based on Contention for Wireless Sensor Networks
Yubin Xu · Journal of Taiyuan University of Science and Technology · 2012
The low-duty-cycle scheme of periodic listen and sleep is able to significantly reduce the energy consumption of wireless sensor networks in SMAC,but it accepts some reduction in both latency and throughput.In order to improve the latency of SMAC caused by the periodic sleep between different virtual clusters,this paper designs a low delay sensor medium access control protocol.This protocol applies the globally-synchronized mechanism to follow the same schedule for all the nodes in the whole network.Therefore,all the nodes in the network can be active at the same time to solve the forward pause problem of data transmission.The simulation results show that in the case of the slightly-increased aggregate energy consumption,LDSMAC greatly reduces the transmission delay and increases the network throughput.