On the bits per joule optimization in cellular cognitive radio networks

Wuchen Tang, Muhammad Z. Shakir, Khalid A. Qaraqe, Erchin Serpedin, Muhammad A. Imran, Rahim Tafazolli

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

1 Citation (Scopus)

Abstract

Cognitive radio has emerged as a promising paradigm to improve the spectrum usage efficiency and to cope with the spectrum scarcity problem through dynamically detecting and re-allocating white spaces in licensed radio band to unlicensed users. However, cognitive radio may cause extra energy consumption because it relies on new and extra technologies and algorithms. The main objective of this work is to enhance the energy efficiency of proposed cellular cognitive radio network (CRN), which is defined as bits/Joule/Hz. In this paper, a typical frame structure of a secondary user (SU) is considered, which consists of sensing and data transmission slots. We analyze and derive the expression for energy efficiency for the proposed CRN as a function of sensing and data transmission duration. The optimal frame structure for maximum bits per joule is investigated under practical network traffic environments. he impact of optimal sensing time and frame length on the achievable energy efficiency, throughput and interference are investigated and verified by simulation results compared with relevant state of art. Our analytical results are in perfect agreement with the empirical results and provide useful insights on how to select sensing length and frame length subject to network environment and required network performance.

Original languageEnglish
Title of host publication2014 1st International Workshop on Cognitive Cellular Systems, CCS 2014
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781479941391
DOIs
Publication statusPublished - 21 Oct 2014
Externally publishedYes
Event2014 1st International Workshop on Cognitive Cellular Systems, CCS 2014 - Rhine River, Germany
Duration: 2 Sept 20144 Sept 2014

Publication series

Name2014 1st International Workshop on Cognitive Cellular Systems, CCS 2014

Conference

Conference2014 1st International Workshop on Cognitive Cellular Systems, CCS 2014
Country/TerritoryGermany
CityRhine River
Period2/09/144/09/14

Keywords

  • Cellular cognitive radio networks
  • energy efficiency
  • optimal frame structure
  • spectrum sensing
  • throughput

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