Simulation and Evaluation of the Interference Models for RFID Reader-to-Reader Collisions

Abstract

When numerous RFID readers are placed in the same area, they may interfere with each other due to the reader collision problem. In recent years, many studies have been presented to address the reader collision problem. However, there is no consonance on the interference model to use in the analysis of the protocols. The main adopted models are the single interference model, which is simple and fast, but only considers the readers within a threshold distance, and the additive interference model, which sums the interferences of all the concurrent interrogations. Recent studies have shown that the single interference model cannot detect a relevant part of the possible collisions detected by the additive one. This paper analyzes and compares the network performance of an RFID system by applying both the models. Considering two proposed scenarios, the performance of the two models are evaluated and presented.

A radio frequency identification reader collision avoidance protocol for dense reader environments in the context of Industry 4.0

“…In relation (2), D is the distance between the two readings R1 and R2, which is shown in Figure 6. $$\propto $$ is the path loss exponent; $${P}_{R}$$ is the reader transmission power; $${G}_{R}$$ is the reader antenna gain, and $${K}_{0}$$ is the coefficient of channel path loss and power ratio in the bandwidth, while $${I}_{R}$$ denotes the whole interference that the reader receives [32]. $$${D}^{\propto }=\frac{{P}_{R}{G}_{{R}_{1}}{G}_{{R}_{2}}}{{K}_{0}{I}_{R}}$$$ …”

Investigation of Interference Models for RFID Systems

“…The RFID network is considered homogeneous. Table 1 shows the values of the parameters adopted in the simulation, in accordance with [ 28 ]. In particular, D is computed by substituting the adopted values into Equation (1).…”