On the performance of decentralized CR MAC protocols under heterogeneous channel sensing conditions

Miguel Luis, Rui Luis, Rodolfo Oliveira, Rui Dinis, Luis Bernardo

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Citation (Scopus)

Abstract

The decentralized Cognitive Radio Medium Access Control (CR MAC) protocols proposed so far are usually evaluated considering homogeneous sensing conditions where all Secondary Users (SUs) share the same view of the channel. By doing so, realistic heterogeneous channel sensing conditions are neglected, which happens due to different spectrum sensing errors and/or different patterns of channel occupation by the different Primary Users (PUs). This work aims to study the performance of CR MAC protocols when different SUs competing for the medium sense the channel differently, i.e., when they achieve different channel sensing decisions at the same instant. The study includes several simulation results comparing the performance of two random access (RA) contention-based protocols and one reservation-based (RB) protocol in terms of throughput under homogeneous and heterogeneous channel sensing conditions. By adopting a systematic approach to characterize the heterogeneity of the SUs' sensing outcomes, it is shown that an increase in the level of heterogeneity decreases the aggregate throughput of all protocols. The results also indicate that under homogeneous channel sensing outputs the RB protocol outperforms the RA protocols. However, due to reservation impairments caused by the heterogeneity, it is shown that heterogeneity causes a higher throughput loss in the RB MAC approach.

Original languageEnglish
Title of host publication2015 IEEE Wireless Communications and Networking Conference Workshops, WCNCW 2015
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages247-252
Number of pages6
ISBN (Electronic)978-1-4799-8760-3
DOIs
Publication statusPublished - 2015
Event2015 IEEE Wireless Communications and Networking Conference Workshops, WCNCW 2015 - New Orleans, United States
Duration: 9 Mar 201512 Mar 2015

Publication series

NameIEEE Wireless Communications and Networking Conference Workshops
PublisherIEEE
ISSN (Print)2167-8189

Conference

Conference2015 IEEE Wireless Communications and Networking Conference Workshops, WCNCW 2015
CountryUnited States
CityNew Orleans
Period9/03/1512/03/15

Keywords

  • Cognitive Radio
  • Medium Access Control
  • Performance Analysis

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