RODRIGUES, F. P.; http://lattes.cnpq.br/4000396265044001; RODRIGUES, Felipe Pereira.
Résumé:
With the RFID tags quantity growth in practical applications, several issues, such as
collisions - event in which two or more tags transmit signals simultaneously -, have their
effects reinforced, what results in an increase of identification delays and significant energy
losses during the communication process. Thus, the use of efficient identification protocols
constitutes one of the main challenges for designing of these systems. Classical methods are
implemented assuming that the information in the collision signal must be discarded. This
work uses a different approach, in which collsions are the basis of a method of information
recovery for passive RFID tags in the UHF range. The concept of singulation codes is reviewed
and a identification protocol that uses these structures is investigated. Results obtained through
simulations have been shown a decrease in the total time identification and an increase in the
throughput for scenarios with high density of tags compared to two ALOHA-based methods.