Um Protocolo Híbrido de Anti-colisão de Etiquetas para Sistemas RFID

The tag identification in RFID systems requires anti-collision protocols, that are traditionally divided into two groups: Tree-based and ALOHA-based protocols. However, the identification process in both approaches is slow in RFID systems with lots of tags. To improve the performance on the tag identification process in dense RFID systems, this work proposes a hybrid anti-collision approach that introduces an ALOHA-based initial identification phase followed by one or more Tree-based phases. Simulation results show that the proposed approach brings a significant reduction on the number of collisions during the tag identification process when compared to that observed by using the QT and QT-SC protocols. Keywords— Tags, reader, collision, protocol, RFID.