An Energy and Application Scenario Aware Active RFID Protocol
Artikel i vetenskaplig tidskrift, 2010

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.

Författare

Björn Nilsson

Högskolan i Halmstad

Research Department

Lars Bengtsson

Chalmers, Data- och informationsteknik, Datorteknik

Bertil Svensson

Högskolan i Halmstad

Eurasip Journal on Wireless Communications and Networking

1687-1472 (ISSN) 1687-1499 (eISSN)

Vol. 2010 Article ID 432938 432938

Styrkeområden

Informations- och kommunikationsteknik

Ämneskategorier

Annan elektroteknik och elektronik

DOI

10.1155/2010/432938