Closed-Form Outage Probability Analysis of a Diamond Relay Network with Opportunistic Spectrum Access

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Surobhi, Nusrat Ahmed and Faulkner, Michael (2009) Closed-Form Outage Probability Analysis of a Diamond Relay Network with Opportunistic Spectrum Access. In: 2009 4th International Symposium on Wireless Pervasive Computing (ISWPC). IEEE, Piscataway, NJ, pp. 124-128.


Opportunistic spectrum access (widely known as cognitive radio) enables the use of unoccupied licensed radio spectrum and thus assures efficient use of the spectrum. In this paper, we investigate the outage probability of a wireless amplify-and-forward cooperative two relay (diamond relay) network which consists of a source, a destination and two network clusters. Each cluster is defined by a number of cognitive nodes (unlicensed) and a primary node (licensed). The cognitive nodes relay the source information by employing opportunistic spectrum access using either repetition-based or best relay selection (i.e. selection cooperation) relaying protocol. Closed-form expressions of outage probability are obtained for non-identical independent Rayleigh fading channels. Selection cooperation exhibits lower outage probability than that of the repetition-based relaying protocol. However, the unavailability of the spectrum causes much increase in the outage probability of Selection cooperation. An improvement of the performance can be provided if the neighbouring nodes of the cognitive node within a cluster sense the spectrum cooperatively. The analytical outage probability expressions have been validated through the simulations.

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Proceedings of a meeting held 11-13 February 2009, Melbourne, Australia

Item type Book Section
DOI 10.1109/ISWPC.2009.4800573
Official URL
ISBN 9781424429653 (print) 9781424442997 (print) 9781424429660 (online)
Subjects Historical > Faculty/School/Research Centre/Department > Centre for Telecommunications and Micro-Electronics (CTME)
Historical > FOR Classification > 1005 Communications Technologies
Historical > SEO Classification > 8901 Communication Networks and Services
Keywords ResPubID17957, cognitive radio, relay network, wireless amplify-and-forward, outage probability
Citations in Scopus 2 - View on Scopus
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