Performance Analysis of Aloha Protocol for RFID Communication Systems

Automatic identification systems (barcode, smartcard, RFID?) are a common and a useful tools in manufacturing, supply chain management, payment system?Due to the low cost and its flexibility, radio frequency identification technology (RFID) has emerged a lot of applications (access control, antitheft car systems?) This technology aims to uniquely identify physical object attached to a so called tag or transponder. When the reader attempts to identify more than one transponder, it may face up a simultaneous interfering transmission from transponders which may causes a collision as tags share the same communication channel. For this generic multi access communication problem, several algorithms have been proposed to identify tags.