Interconnected RFID Reader Collision Model and its Application in Reader Anti-collision

Abstract

While several readers are placed together for improving read rate and correctness, reader collision problems happen frequently and inevitably. High probability of collision not only impairs the benefit of multi-reader deployment, but also results in misreading in moving tags RFID applications. In order to eliminate or reduce reader collision, a current centralized reader network can be modeled as a collaborative network for readers to directly exchange information with other readers. Peer-to-peer computing technology is an emergent technology and is also a preferred candidate for this purpose. Hence, in this paper we present a collaborative peer-to-peer network for reader collision model. This Interconnected RFID Reader Collision Model (IRCD) is constructed upon the RFID reader collision so that it is a fully distributed and self-organized overlay network. IRCD can be used in a dense reader environment to exchange collision related information directly among readers without any central control or intermediation. To illustrate how to use IRCD, a query-hit rate-based dynamic anti-collision scheme is also proposed in this paper.