Novel ALOHA Anti-collision Algorithm Based on Power Control

摘要

In Radio Frequency Identification (RFID) system, tag collision affects the system performance and is the key issues urgently to be solved. Based on existing algorithms, two modified ALOHA-based anti-collision algorithms are proposed in this paper: the stepped power-control ALOHA anti-collision algorithm (SPCA) and the adaptive power-control ALOHA anti-collision algorithm (APCA). The novelty is changing the identification range by controlling the transmission power of the reader, and thus reducing the number of tags to be identified at the same time. Simulation results have shown that the proposed algorithms make better improvements in minimizing the total number of time slots and the total time used to identify the tags. More importantly, the energy consumed in the identification process is much less than existing algorithms.