Low Latency Asynchronous Hybrid Sender And Receiver Initiated Duty Cycle MAC Protocol For Wireless Sensor Networks

Abstract

Energy conversation is one of the primary objective of duty cycle MAC protocols. A number of synchronous and asynchronous duty cycle MAC protocols are proposed in the recent years. Especially recently proposed Asynchronous duty cycle MAC protocols are highly energy efficient, however they suffer significant packet delivery latency on wireless links given dynamic traffic loads in diverse networks.In our thesis, we present an asynchronous hybrid protocol called Hybrid MAC (H-MAC), which uses both sender and receiver initiated mechanisms to combat the packet delivery latency .In H-MAC each node schedules its sleep and wake up time based on cross layer routing information in receiver initiated part. In sender initiated part each sender chooses its wake up time based on the receiver’s wake up information. We have evaluated H-MAC in diverse networks and heavy traffic loads, experiment reveal that, H-MAC significantly reduces packet delivery latency and energy consumption compared to RI-MAC. Furthermore H-MAC increases number of packet delivered in less time.