A Complete Spectrum Sensing and Sharing Model for Cognitive Radio Ad Hoc Wireless Networks Using Markov Chain State Machine

A Complete Spectrum Sensing and Sharing Model for Cognitive Radio Ad Hoc Wireless Networks Using Markov Chain State Machine

Amir Rajaee (University of Texas at San Antonio, USA), Mahdy Saedy (University of Texas at San Antonio, USA) and Brian Kelley (University of Texas at San Antonio, USA)
DOI: 10.4018/jitn.2011070102
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Abstract

an unlimited number of secondary users. It includes the sharing aspect of Cognitive Radio. Power-law distribution of node degree in scale-free networks is important for considering the traffic distribution and resource management thus we consider the effect of the topology on sensing and sharing performances. The authors demonstrate that CIF outperforms Uniform Indexing (UI) algorithm in Scale-Free networks while in Random networks UI performs as well as CIF.
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2. Network Topology

The network topology is one of the main factors in considering the traffic flow and resource management in telecommunication networks. There are different ad hoc topologies like random and scale-free discussed in network theories each presenting certain characteristics.

<b>A.</b> Random Topology</div><p>There are classes of networks where the nodes are attached to the network in a random way meaning that the number of connections of nodes has a normal distribution. The degree (number of links to the node) distribution of nodes in such networks is a Gaussian type distribution.</p></div><div><title style="title-2" titleHref="b.-scale-free-topology"><b>B.</b> Scale-Free Topology</div></div><div class="preview-footer"><a href="javascript:__doPostBack('ctl00$cphFeatured$lnkAddToCart','')">Purchase this article to continue reading all 14 pages ></a></div></div></span><div id="article-list"><h2 class="margin-top"> Complete Article List </h2><div class="search-contents"><span class="text"> Search this Journal: </span><span class="text-box-container"><input id="txtKeywords" type="text" maxlength="50" onkeypress="return SearchJournalFulltextHandleEnter(event, 1122, '');" title="Full text search term(s)" class="SearchTextBox TextBoxWatermark text-box" /></span><div class="inline-block search-contents-xs-full-width"><span class="search"><span class="search-button" onclick="RemoveSpecialCharacters();SearchJournalFulltext(1122, '');"></span></span><span 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