An Unknown Tag Identification Protocol Based on Coded Filtering Vector in Large Scale RFID Systems

RFID is an emerging technology that provides timely and high-value information to inventory management and object tracking, in which areas that identifying unknown tags completely is crucial. From prior researches in this area, one of the pending problem involves processing redundant time frames due to unknown tag collisions. In this paper, we propose a time-efficient unknown tag identification protocol based on coded filtering vector technique. This vector is able to efficiently separate unknown tags from known tags. It reduces the unknown-known tag collisions as well as the required time frame length. The proposed protocol can achieve the minimal execution time theoretically. And further simulations demonstrate that it performs much better than existing work by decreasing 30% of the total execution time on average.