Framed Aloha Based Anti-collision Protocol for RFID tags

Abstract In this paper, we present evaluation performances of ananti-collision protocol for RFID tags. The protocol enableselectronic markers, also known as smart labels or tags, to beidentified. The principle of the protocol is the framed alohawith an optimization of the frame length. The optimizationof this length is based on an evaluation of the number of ac-tive tags. Besides its performances, a particularly interestingfeature of the method is that it does not depend on factoryparameters or uniqueness of the identifier and that it adaptsitself to environmentalconditions to ensure efficient iden tifi-cation. Keywords RFID, anti-collision protocol 1 Introduction Microprocessorcards are increasingly used by consumersas they providea variety of services in fields such as automa-tion of banking services, access to multimedia resources andcommunication tools.At the same time, objects now have the possibility of ac-cessing digital services. For example digital markers forvehicles are currently being discussed. They can dynam-ically input, store and process major data involving safetyand maintenance, as well as administrative data concerningvehicles, such as insurance.In practice, a prerequisite for integrating an object into acomputerized circuit, is that its name and some of its char-acteristics, such as the price can be automatically read. Thefinal result is an extraordinarydevelopmentof the simple ba rcode or label technology. Every week, billions of bar codesare produced to identify objects thus making it possible toinput essential data identifying these objects automatically.However, bar codes have several limitations that preventthem from being used in some applications.