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An Energy and Application Scenario Aware Active RFID Protocol

Björn Nilsson ; Lars Bengtsson (Institutionen för data- och informationsteknik, Datorteknik (Chalmers)) ; Bertil Svensson
EURASIP Journal on Wireless Communications and Networking (1687-1499). Vol. 2010 (2010), Article ID 432938,
[Artikel, refereegranskad vetenskaplig]

The communication protocol used is a key issue in order to make the most of the advantages of active RFID technologies. In this paper we introduce a carrier sense medium access data communication protocol that dynamically adjusts its back-off algorithm to best suit the actual application at hand. Based on a simulation study of the effect on tag energy cost, read-out delay, and message throughput incurred by some typical back-off algorithms in a CSMA/CA (Carrier Sense Multiple Access/Collision Avoidance) active RFID protocol, we conclude that by dynamic tuning of the initial contention window size and back-off interval coefficient, tag energy consumption and read-out delay can be significantly lowered. We show that it is possible to decrease the energy consumption per tag payload delivery with more than 10 times, resulting in a 50% increase in tag battery lifetime. We also discuss the advantage of being able to predict the number of tags present at the RFID-reader as well as ways of doing it.

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Denna post skapades 2011-01-17. Senast ändrad 2013-10-29.
CPL Pubid: 134278


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