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'Blue Eyes Intelligence Engineering and Sciences Engineering and Sciences Publication - BEIESP'
Doi
Abstract
Cognitive Radio based network technology provides
a promising solution for various types of real-time wireless
communication by offering better spectrum utilization and
resource allocation. Generally, the dynamic network topology,
interference, channel switching and under-utilization of resource
can degrade the network performance. Therefore, development
of promising solution to obtain the desired performance is a
challenging research topic in CRNs. Several researches have
been carried out which have focused on development of routing
protocol for CRNs to improve the performance. These routing
protocols are classified as local and global routing which are
mainly focused on overhead reduction and optimal route
selection respectively. However, the conventional approaches
suffer from various issues such as interflow-interference,
channel switching delay and node overhearing problems which
can progress towards the poor network performance. In this
paper, our objective is to focus on the inter-flow interference,
channel switching delay, and develop a cooperative
communication based approaches where inter-flow interference
and overhearing issues are mitigated using cooperative
communication. Furthermore, Switching Delay and Interference
(SDI) routing metric is developed to reduce the switching delay
and also finally, a cooperative scheme of packet transmission is
developed where direct or cooperative communication is selected
for successful packet transmission. The proposed approach
jointly considers channel and interference issue, hence it is
known as Joint Cooperative Channel and Interference Aware
Routing (JCIAR). The performance of proposed approach is
compared with the existing techniques such as Primary User
Aware k-hop route discovery scheme (PAK), AODV, CognitiveAODV, and Location-Aided Routing for CRN (LAUNCH) in
terms of delay, packet delivery rate and throughput. The
obtained result shows a significant improvement in network
performance
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