TITLE:
Analysis of Cognitive Radio Enabled Flooding in Opportunistic Networks
AUTHORS:
Muhammad Arshad Islam, Marcel Waldvogel
KEYWORDS:
Opportunistic Networks, Delay Tolerant Networks, Flooding, Cognitive Radio, Simulation
JOURNAL NAME:
International Journal of Communications, Network and System Sciences,
Vol.7 No.7,
July
25,
2014
ABSTRACT: Epidemic routing
(Flooding) is considered as a simple routing protocol for opportunistic
networks where the participants attempt to transmit whatever information they
have to everyone who does not already have that information. However, it is
plagued with disadvantages of resource scarcity as it exerts stress on
available bandwidth as well as storage capacity of the devices in the network.
Cognitive radio (CR) is one of the emerging technologies that can improve the
bandwidth utilization by smart allocation of spectrum radio bands. Ideally
speaking, a spectrum-aware cognitive radio is able to sense the local spectrum
usage and adapt its own radio parameters accordingly. In this study, we have
performed experiments to analyze the gains achieved by flooding protocol using
cognitive radios of varying capabilities in opportunistic networks. We have
performed experiments on three opportunistic networks obtained from real-life
traces from different environments and presented results showing variance in
delivery efficiency as well as cost incurred on those scenarios. Our results
show that performance of flooding can be significantly improved using CRs in
bandwidth-scarce environments; however, the improvement is not uniform with the
increase in a number of available bands.