ASAP: A MAC Protocol for Dense and Time-Constrained RFID Systems

We introduce a novel medium access control (MAC) protocol for radio frequencyidentification (RFID) systems which exploits the statistical information collected at the reader. Theprotocol, termed adaptive slotted ALOHA protocol (ASAP), is motivated by the need to significantlyimprove the total read t...

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Published inEURASIP journal on wireless communications and networking Vol. 2007; no. 1
Main Authors Khandelwal, Girish, Lee, Kyounghwan, Yener, Aylin, Serbetli, Semih
Format Journal Article
LanguageEnglish
Published SpringerOpen 01.01.2007
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Summary:We introduce a novel medium access control (MAC) protocol for radio frequencyidentification (RFID) systems which exploits the statistical information collected at the reader. Theprotocol, termed adaptive slotted ALOHA protocol (ASAP), is motivated by the need to significantlyimprove the total read time performance of the currently suggested MAC protocols for RFID systems.In order to accomplish this task, ASAP estimates the dynamic tag population and adapts the frame sizein the subsequent round via a simple policy that maximizes an appropriately defined efficiency function.We demonstrate that ASAP provides significant improvement in total read time performance over thecurrent RFID MAC protocols. We next extend the design to accomplish reliable performance of ASAPin realistic scenarios such as the existence of constraints on frame size, and mobile RFID systems wheretags move at constant velocity in the reader's field. We also consider the case where tags may fail torespond because of a physical breakdown or a temporary malfunction, and show the robustness inthose scenarios as well.
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ISSN:1687-1499
1687-1472
1687-1499
DOI:10.1155/2007/18730