Pulse detection based anti-collision protocol for passive RFID system

Authors:
Hong gang Wang;Chang xing Pei;Feng Zheng
Affiliations:
State Key Laboratory of Integrated Services Networks, Xidian University, Xi'an, China;State Key Laboratory of Integrated Services Networks, Xidian University, Xi'an, China;The School of Telecommunication Engineering, Beijing University of Posts and Telecommunications, Beijing, China
Venue:
WiCOM'09 Proceedings of the 5th International Conference on Wireless communications, networking and mobile computing
Year:
2009

Citing 3
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Abstract

Accurate tag collision estimation is very important for ALOHA-based anti-collision protocol for passive RFID system. In this paper, a method of pulse detection is proposed to detect the collision and estimate the population of tags accurately by slightly modifying the frame structure in ISO 18000-6 type C specification. And then improved slotted ALOHA-based anti-collision protocol based on pulse detection is proposed. In our protocol, a re-query process may be introduced after reader receiving the replies of tags at the end of one slot to access the collision tags quickly. Simulations results show the proposed protocol achieves a system throughput of 0.48. It is an improvement compared with the performance of existing ALOHA-based protocol, and it is simple and low cost for implementation.