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Energy Efficient CCC based AODV Routing Protocol for Cognitive Radio Ad-Hoc Networks

Spectrum mobility in Cognitive radio ad-hoc networks introduces additional energy consumption apart from joint channel-path selection. Application data transmission in CR routing is based on channel-route path selected from common control channel (CCC). Hence, CCC plays a pivotal role in selecting and managing energy efficient channel-routes in Cognitive radio ad-hoc networks. State-of-the-art CR routing protocols either use 2.4 GHz unlicensed dedicated CCC (global) or licensed PU free CCC (local) for channel-path selection which results in higher energy consumption due to longer channel hop-count and higher control channel switching delays. Several small slices of unlicensed frequencies (433 MHz/868 MHz/902-928 MHz) are existing in lower spectral bands which are not efficiently utilized. This paper proposes a low rate (902 MHz) energy efficient CCC based AODV protocol to broadcast route control messages which select energy efficient channel- route paths through minimizing hop count, link failures, routing overhead and end-to-end data transmission delay. Experimental results show that the performance of the proposed AODV protocol outperforms compared with existing CCC based CR- AODV routing protocols. 