Survey on QoS Guaranteed Routing in Cognitive Radio Ad Hoc Network

Cognitive radio ad hoc networks have quality of service (QoS) challenges due to multiple factors of improper spectrum utilization, multipath fading and hidden node issues. Routing can be made effective by proper management of primary user spectrum and allocation of channels. This involves accurate detection of primary user, prediction of channels free time, etc. When routing is based on these spectrum availability prediction, the QoS of routing in terms of packet delivery ratio, overall latency, throughput, etc. can be improved. This work explores the exiting works on improving the QoS of routing in cognitive radio networks. Existing works are reviewed in three perspectives of routing, spectrum sensing and spectrum sensing attacks. The aim of this work is to identify the challenges in achieving higher QoS in cognitive radio ad hoc networks and present prospective solution architecture to address those challenges.