Issue No.02 - February (2011 vol.10)
Gaia Maselli , University of Rome "La Sapienza", Rome
Thomas F. La Porta , The Pennsylvania State University, University Park
DOI Bookmark: http://doi.ieeecomputersociety.org/10.1109/TMC.2010.58
One of the major challenges in the use of Radio Frequency-based Identification (RFID) on a large scale is the ability to read a large number of tags quickly. Central to solving this problem is resolving collisions that occur when multiple tags reply to the query of a reader. To this purpose, several MAC protocols for passive RFID systems have been proposed. These typically build on traditional MAC schemes, such as aloha and tree-based protocols. In this paper, we propose a new performance metric by which to judge these anticollision protocols: time system efficiency. This metric provides a direct measure of the time taken to read a group of tags. We then evaluate a set of well-known RFID MAC protocols in light of this metric. Based on the insights gained, we propose a new anticollision protocol, and show that it significantly outperforms previously proposed mechanisms.
RFID, passive tags, single reader, anticollision, MAC protocols.
Gaia Maselli, Thomas F. La Porta, "Anticollision Protocols for Single-Reader RFID Systems: Temporal Analysis and Optimization", IEEE Transactions on Mobile Computing, vol.10, no. 2, pp. 267-279, February 2011, doi:10.1109/TMC.2010.58