Throughput and Fairness Analysis of Channel-hopping Scheme under Smart Jammer Attacks in IEEE 802.11 WLANs

Jamming attack in wireless networks is a severe problem and is easily accomplished by emitting a continuous radio signal. Although the perfect solution to avoid jamming attack does not exist due to the nature of the wireless shared medium, a channel-hopping scheme is considered one of the most effective ways to mitigate jamming attacks. In this paper, I consider various channel-hopping schemes under smart jammer attacks and study the issue of throughput and fairness in such networks. I provide an analytical model that can be used to evaluate the performance of channel-hopping schemes by calculating normalized network throughput. I also propose a simple channel-hopping scheme that preserves fairness among active stations under a jamming attack. The numerical results show that the proposed channel-hopping scheme enhances fairness significantly at minimal throughput degradation expense.