Anti-jamming channel hopping protocol design based on channel occupancy probability for Cognitive Radio Networks

Abstract

In a Cognitive Radio Network (CRN), a secondary user may suffer from jamming attacks if a fixed channel hopping sequence is utilized. Existing anti-jamming channel hopping protocols have at least one of the shortcomings such as sharing confidential information beforehand, no rendezvous guarantee between any pair of SUs, or long time to rendezvous. Another issue in existing anti-jamming channel hopping protocols is that the channels with different PU occupancy probabilities are being used equally. To improve the existing anti-jamming channel hopping protocols in CRNs, we propose rendezvous-guaranteed anti-jamming protocols OLAA_T and OLAA_R in this paper. Both protocols are capable of adjusting the channel usage ratio according to PU occupancy probability. Simulation results verify that OLAA_T and OLAA_R enhance the existing most practical anti-jamming channel hopping protocol, Load Awareness Anti-jamming (LAA), by up to 41% in terms of network throughput.