An improved Vogt anti-collision protocol with early end feature in the mobile RFID systems

Vogt protocol is a dynamic frame slotted ALOHA protocol. It has been used to the I-code system developed by Philips Semiconductors. Similar to many existing anti-collision protocols, The Vogt protocol aims at tag identification in static scenarios, that is, all tags keep still during the tag identification process. For the scenarios, Vogt's system performance can be analyzed by performance metrics, such as throughput, the identification efficiency, the error rate of tag estimation and the identification delay, etc. However, there also exist many special scenarios, named mobile RFID systems, where tags move along a fixed path in the reader's interrogation zone. In these scenarios, tags may leave the interrogation zone unidentified. These tags are called lost tags. In this paper, we propose an improved Vogt anti-collision protocol with early end feature in mobile RFID systems which can decrease tag loss by early terminating idle slots and lost tag slots in the mobile RFID systems. Simulation results show that the proposed protocol can significantly reduce the numbers of lost tags in mobile RFID systems. © 2013 IFSA.