A slot-controlling method for anti-collision in active RFID system

It is widely accepted that active radio frequency identification (RFID) has been bringing forth great change in modern society, such as logistics, trace and orientation. Passive RFID is a significant research point owing to its advantages. In the meanwhile, anti-collision in active RFID system is inevitable especially in condition of massive tags. Through experiment and analysis, we found out that the ISO/IEC 18000-7 protocol cannot handle the problem well so we put forward a brand new algorithm which is called the slot-controlling method to improve its inventory rate. The conception described in this text is introduced to improve the use of vacant slot and additionally, master and slave reader mechanism can help improve the efficiency of recognition. Finally, we compared the result between the new algorithm and the old one and draw a conclusion that the new slot-controlling method can help improve the inventory rate dramatically under conditions of massive tags.