A Combined Polling and Random Access Technique for Enhanced Anti-Collision Performance in RFID Systems

Jeong Geun KIM

IEICE TRANSACTIONS on Communications   Vol.E92-B    No.4    pp.1357-1360
Publication Date: 2009/04/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E92.B.1357
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Network
RFID,  anti-collision protocol,  polling,  framed slotted Aloha protocol,  

Full Text: PDF>>
Buy this Article

In this paper we propose a novel RFID anti-collision technique that intelligently combines polling and random access schemes. These two fundamentally different medium access control protocols are coherently integrated in our design while functionally complementing each other. The polling mode is designed to enable fast collision-free identification for the tags that exist within reader's coverage across the sessions. In contrast, the random access mode attempts to read the tags uncovered by the polling mode. Our proposed technique is particularly suited for a class of RFID applications in which a stationary reader periodically attempts to identify the tags with slow mobility. Numerical results show that our proposed technique yields much faster identification time against the existing approaches under various operating conditions.