Grouping based bit-slot ALOHA protocol for tag anti-collision in RFID systems

Tag collision arbitration is a significant issue in RFID system design. This letter presents an efficient stochastic scheme based protocol which is characterized by the fact that both idle and collisional timeslots are reduced obviously. Utilizing of reservation sequence and controlling the number of tags to respond ensure the protocol works stably and efficiently. Simulation results show that the proposed protocol has a good performance and requires less time consumption than other stochastic scheme based protocols.