Joint Design of RFID Reader and Tag Anti-Collision Algorithms: A Cross-Layer Approach
This paper investigates the potential interactions between reader and tag anti-collision algorithms of passive RFID (Radio Frequency IDentification) systems. Conventionally, reader and tag anti-collision algorithms are designed by assuming that they are independent from each other. In practice, however, readers and tags usually operate in the same frequency band. Therefore, contention between their transmissions can also potentially arise. Furthermore, reader anti-collision policies directly influence the way in which tags are activated, and thus also the way in which they collide when responding to reader's requests. In view of this and considering the growing numbers of readers and tags, independence of both schemes can not longer be considered as a realistic assumption.