Asynchronous and Staggered MAC Protocol for WSN

Abstract

This paper presents Staggered And Asynchronous MAC, a new energy efficient MAC protocol based on asynchronous duty cycling. In staggered asynchronous MAC protocol the nodes wake up at a randomized time to receive the data, with the data transaction the nodes also interchange the parameter. They use those parameters to get themselves synchronized with the previous node. In this way all the nodes get accounted with the wakeup of the previous nodes. So the node wakes up just before receiving the data. We present a new staggered asynchronous duty cycle MAC protocol that uses Receiver-initiated data transmission in order to efficiently and effectively operate over a wide range of traffic loads. Our proposal attempts to minimize the time a sender and its intended receiver occupy the wireless medium to find a rendezvous time for exchanging data. We show the performance of our proposed MAC through detailed NS-2 simulation. Compared to the prior asynchronous duty cycling approach of X-MAC, RI-MAC, PW-MAC, our mechanism achieves higher throughput, packet delivery ratio, and power efficiency under a wide range of traffic loads.