An Efficient MAC Protocol for Throughput Enhancement in Dense RFID System

In dense radio frequency identification (RFID) system, reader collision problem is bottleneck of overall system performance. In this paper we propose a distributed multi-channel reader anti-collision MAC (ACMAC) protocol to mitigate the reader collision problem. The proposed probability based channel selection approach helps selecting channel efficiently and reduces the waiting time and beaconing method solves the hidden and exposed node problem. Also, channel utilization probability based random backoff mitigates the collision possibility in the control channel. Simulation results show our protocol is energy efficient and gives higher network throughputs than the existing MAC layer protocol in RFID.