Evaluation of the Additive Interference Model for RFID Reader Collision Problem

The reader collision problem is a critical issue in RFID systems, since it affects the reliability and the efficiency of the network. Although several solutions have been proposed to address the reader collision problem, they are usually based on models that consider only direct collisions among two readers. In real deployments, the additive interference model that captures the accumulation of n concurrent readers' interference is more accurate. Furthermore, even if an additive interference model is considered, it is important to decide how many concurrent readers' interferences have to be considered. The value of n determines a trade-off between the reliability and the efficiency of the RFID system. In this paper, the additive interference model with different values of n is evaluated. The proposed model provides an evaluation tool to select a suitable value of n according to the system requirements and the simulation results have shown the impact of n in a specific deployment.