Scanning-Based Pre-Processing for En hanced Tag Anti-Collision Protocols

RFID is a generic term for technologies which use RF waves to identify, track, or categorize any object. One of the research areas in RFID systems is a tag anti-collision protocol; how to reduce identification time with a given number of tags in the field of an RFID reader. There are two types of tag anti-collision protocols for RFID systems: tree based algorithms and slotted aloha based algorithms. This paper proposes a method for enhancing the performance of the present RFID tag anti-collision protocols by scanning the positions of collided bits and once accessing few memories at tags to inform the positions. Since any of the present RFID tag anti-collision protocols with the scanning-based pre-processing can ignore the overhead from no collided bits, the analytic results show that scanning-based pre-processing elicits lower time consumption for tag identification from the present schemes