A radio frequency Identification (RFID) reader recognizes objects through wireless communications with RFID tags. Tag collision arbitration for passive tags is a significant issue for fast tag identification due to communication over a shared wireless channel. This paper presents an adaptive memoryless protocol, which is an improvement on the query tree protocol. Memoryless means that tags need not have additional memory except ID for Identification. To reduce collisions and identify tags promptly, we use information obtained from the last process of tag identification at a reader. Our performance evaluation shows that the adaptive memoryless protocol causes fewer collisions and takes shorter delay for recognizing all tags while preserving lower communication overhead than other tree based tag anticollision protocols.
Bibliographical noteFunding Information:
Manuscript received September 17, 2005; revised December 25, 2005. This work was supported by the Ministry of Information and Communication of Korea under ITRC program supervised by IITA under Grant IITA-2005-(C1090-0501-0019). The associate editor coordinating the review of this manuscript and approving it for publication was Dr. Anna Hac.
- Collision resolution
- Tag anticollision
- Tag identification
ASJC Scopus subject areas
- Signal Processing
- Media Technology
- Computer Science Applications
- Electrical and Electronic Engineering