A Segment Collision Inversion Protocol for RFID Tag Reading

This paper presents a novel tag identification mechanism called the Collision Inversion (CI) method, that identifies the transmission tag IDs by their collided bits. Based on the CI method, anti-collision protocols coined the Pure Collision Inversion Protocol (PCIP) and the Segment Collision Inversion Protocol (SCIP) are proposed. Theoretical analysis shows that the identification efficiency of PCIP is decided by the ID length and the tag number. SCIP combines the identification mechanism of traditional tree-based protocol with PCIP, and becomes flexible and efficient. Compared to the mainstream protocols like the Query Tree (QT) Protocol, Jumping and Dynamic Searching (JDS) Protocol and New Enhanced Anti-Collision Algorithm (NEAA), simulation results show that SCIP can reduce both the identification delay and the average energy consumption.