Enhanced Alternate Hop and Wait Algorithm Against A Jamming Attack in CRNs
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Although the frequency spectrum varies, it is very often used by organizations such as the military, civil aviation, ports, and transportation, leaving a very narrow spectrum for personal communication. In this situation, cognitive radio is considered as a solution to improve the liquidity of communication. Indeed, cognitive radio networks analyze available frequencies so that secondary users can communicate without interfering with primary users. In this way, two or more auxiliary users are connected to each other without an appointment, called a rendezvous phenomenon, and many rendezvous algorithms have been developed in the past 20 years. An AHW (Alternate Hop and Wait) algorithm is one of the well-known algorithms that show fast and guaranteed rendezvous performance. In this paper, we show that the AHW algorithm can be significantly degraded under a sophisticated jamming attack. Then we propose an enhanced AHW rendezvous algorithm by adding more random calculations to enhance the robustness against jamming attack. Our numerical results show that the rendezvous probability of the enhanced AHW algorithm is almost steady under jamming attack and close to 40% and the average TTR performances of the enhanced AHW algorithm outperform the original AHW algorithm.
Abstract
Although the frequency spectrum varies, it is very often used by organizations such as the military, civil aviation, ports, and transportation, leaving a very narrow spectrum for personal communication. In this situation, cognitive radio is considered as a solution to improve the liquidity of communication. Indeed, cognitive radio networks analyze available frequencies so that secondary users can communicate without interfering with primary users. In this way, two or more auxiliary users are connected to each other without an appointment, called a rendezvous phenomenon, and many rendezvous algorithms have been developed in the past 20 years. An AHW (Alternate Hop and Wait) algorithm is one of the well-known algorithms that show fast and guaranteed rendezvous performance. In this paper, we show that the AHW algorithm can be significantly degraded under a sophisticated jamming attack. Then we propose an enhanced AHW rendezvous algorithm by adding more random calculations to enhance the robustness against jamming attack. Our numerical results show that the rendezvous probability of the enhanced AHW algorithm is almost steady under jamming attack and close to 40% and the average TTR performances of the enhanced AHW algorithm outperform the original AHW algorithm.
참고문헌 (13)
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