Mecanismo de Controle de Potência e Anticolisão para Sistemas RFID (A Power Control and Anticolision Mechanism for RFID Systems)

Walfredo Costa Lucena Filho (, Lucas Carvalho Cordeiro (, Waldir Sabino da Silva Júnior (, Celso Barbosa Carvalho (

1Universidade do Estado do Amazonas
2Universidade Federal do Amazonas

This paper appears in: Revista IEEE América Latina

Publication Date: Oct. 2017
Volume: 15,   Issue: 10 
ISSN: 1548-0992

RFID (Radio Frequency IDentification) applications require identification of large number of tags, which results in increased collisions and degradation in the performance of traditional DFSA (Dynamic Frame slot ALOHA) algorithms. This paper proposes a power control mechanism to estimate the amount of tags in RFID networks. The mechanism is based on the division of the interrogation zone in sub-areas called clusters. This division is used to interrogate in a single slot all tags of a cluster, perform measurements of RSSI and, with it, estimate the amount of tags per cluster. The mechanism is simulated and evaluated using our own simulator developed in C/C ++ programming language. We compared the results of number of slots, identification time and energy consumption with that obtained from the use of the optimal DFSA algorithm and Q algorithm of the EPCglobal standard. From the simulation results, one can see that the proposed mechanism provides performance 99% close to the ideal DFSA in dense networks, where there are large amount of tags.

Index Terms:
Power Control, Radio Frequency Identification, RFID, Clustering, Anticolision Mechanism   

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