Comprehensive Analysis of Routing Protocols for Cognitive Radio Ad-hoc Networks (CRAHNs)

To resolve the issue of efficient spectrum allocation, a precious resource in communication systems, Cognitive Radio Adhoc Networks were proposed. Cognitive Radio Networks (CRNs) technology is becoming promising day by day as it combines technicalities of traditional ad hoc networks with Cognitive radio technology for efficient utilization of spectrum. Cognitive Radio Networks are surrounded by lots of technical challenges like spectrum variations in temporal and spatial domain, unknown behavior of primary and cognitive users, dynamic topology, security, routing and energy efficiency. Several protocols for optimizing routing and other parameters are proposed by researchers, but still lots more needs to be performed. The objective of this paper is to present detailed analysis of routing protocols in CRNs. The paper also presents a performance comparison of routing protocols to lay a strong base for researchers to find new scope for research to optimize CRNs.