Modeling and performance evaluation of jamming-tolerant wireless systems

Abstract

Many of the failures suffered by wireless systems are not accidental; they are actually caused by security breaches. Therefore, the conventional QoS measures are not sufficient for quantifying the performance of wireless systems. In fact, there is a need for security-related QoS measures that describe the performance of wireless systems under security-breaches. In this paper we focus on Jamming which is one of the most common security breaches in wireless systems. We propose a mathematical model for jamming-tolerant wireless systems. Our model is based on the theory of semi-Markov processes (SMPs). By analyzing the steady-state behavior of the proposed SMP, we derive security-related performance measures such as the steady-state availability and the “mean time to process a packet” (MTTPP). By studying the transient behavior of the proposed SMP, we derive the “probability of packet failure” (PPF) and the “mean time to packet failure” (MTTPF) performance measures. With the proposed model, we analyze the performance of a real jamming-tolerant wireless system for smart grid applications and the numerical results are presented.