• COLLISION RESOLUTION TECHNIQUE IN DENSE PASSIVE READ AND WRITE RFID TAGS

Abstract

RFID technology allows information to be stored and read without requiring either contact or a line of sight between the tag and the reader. For this contact-less feature, it looked as an alternative solution to bar code in the distribution industry and supply chain, as it can hold more data. During heavy deployments, signal transmissions from multiple tags result in tag collisions or confusion causing increase in identification delay, communication overhead and unnecessary energy wastage that ultimately shortens the life span of the system. This paper has meticulously presented the existing anti – collision approaches for read and write passive tags and has also discussed the limitations in detail. Based on the comprehension gained, a new proposal is also illustrated for densely deployed tags which significantly outperforms the previously proposed algorithms.