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

Abstract

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 channelroute 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.  Index Terms-AODV, energy efficiency, power control, common control channel.