GENTLE: Reducing Reader Collision in Mobile RFID Networks

Mobile RFID, the technology of a cellular phone equipped with a RFID reader, allows users to read RFID tags anywhere. However, signals from more than two readers can interfere with one another, i.e., reader collision problem; reliable tag reading is necessary. This paper proposes Gentle protocol to use beacon messages and multi-channel for increasing throughput. In addition, Gentle protocol can put tag ID information into the beacon message and share it among close readers. Simulation results show that Gentle protocol outperforms existing reader anti-collision protocols.