Low Access Delay Anti-Collision Algorithm for Reader in RFID systems

Radio Frequency Identification (RFID) is a technology which is spreading more and more as a medium to identify, locate and track assets through the productive chain. As all the wireless communication devices sharing the same transmission channel, RFID readers and tags experience collisions whenever deployed over the same area. In this work, the RFID reader collision problem is studied and a centralized scheduling-based algorithm is proposed as possible candidate solution, especially for those scenarios involving static or low mobility readers.
Taking into account the circuitry limitations of the tags, which do not allow to use frequency or code division multiple access schemes in the RFID systems, this paper proposes an algorithm aiming to prevent the readers collisions, while keeping the access delay of the readers to the channel possibly low. The
simulation results show that this algorithm performs well as far as it concerns the collision avoidance also when the mobility of readers is taken into account and it exhibits low access delay especially in static scenarios.