Novel anti-collision algorithm in RFID system

In some radio frequency identification (RFID) systems, there are lots of tags can not be identified when tags come into and get out of the scope of the reader in a regular way, for the readers with a general algorithm do not give priority to read the leaving tags. A novel anti-collision algorithm was designed for this situation, which was called the first come first served (FCFS) algorithm. The reader grouped the tags by the order of arrival, and identified them according to the urgency of the time group. Secondly, algorithm avoided the predictable collision by setting a parameter. Thirdly, the reader set the upper value of the slots for every time group. The simulation result shows that keeping the leaking proportion less than 0.01, the arrival rate of tags which the system can bear increases by 50% and when the arrival rate of tags is 0.45, the throughput increases by 13%, compared to the prefix-randomized query-tree algorithm.