Spectrum sensing and data transmission tradeoff in cognitive radio networks

Yulong Zou, Yu Dong Yao, Baoyu Zheng

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

19 Scopus citations

Abstract

In cognitive radio networks, a cognitive source node typically requires two essential phases to complete a cognitive transmission process: the phase of spectrum sensing with a certain time duration to detect a spectrum hole (thus also referred to as spectrum hole detection phase) and the phase of data transmission through the detected spectrum hole. In this paper, we focus on the analysis of cognitive transmissions by jointly considering the two phases. An exact closed-form expression of an overall outage probability that accounts for both the probability of no spectrum hole detected and the probability of a channel outage is derived for cognitive transmissions. Based on the derived overall outage probability, we investigate the spectrum hole utilization efficiency, which is used to quantify the percentage of spectrum holes utilized by the cognitive source for its successful data transmission. Numerical results show that there is a tradeoff in determining the time durations for hole detection and data transmission phases in order to maximize the spectrum hole utilization efficiency.

Original languageEnglish
Title of host publicationWOCC2010 Technical Program - The 19th Annual Wireless and Optical Communications Conference
Subtitle of host publicationConverging Communications Around the Pacific
DOIs
StatePublished - 2010
Event19th Annual Wireless and Optical Communications Conference, WOCC2010: Converging Communications Around the Pacific - Shanghai, China
Duration: 14 May 201015 May 2010

Publication series

NameWOCC2010 Technical Program - The 19th Annual Wireless and Optical Communications Conference: Converging Communications Around the Pacific

Conference

Conference19th Annual Wireless and Optical Communications Conference, WOCC2010: Converging Communications Around the Pacific
Country/TerritoryChina
CityShanghai
Period14/05/1015/05/10

Keywords

  • Cognitive radio
  • Cognitive transmission
  • Outage probability
  • Spectrum sensing
  • Tradeoff

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