Performance analysis of primary and secondary users in a cognitive multiple-access channel

Gozde Ozcan, M. Cenk Gursoy

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Scopus citations

Abstract

In this paper, we consider a cognitive multiple access channel (MAC) in which the secondary users seek to communicate with the secondary base station in a spectrum-sharing environment. The base station selects only one secondary user, which maximizes the weighted difference between the channel power gains of the interference link and the cognitive transmission link. This selection strategy can also be specialized to selecting the secondary user that has either the least interference channel gain or the highest data channel gain. Consequently, the selected secondary user is subject to an interference power constraint in order to avoid harmful interference inflicted on the primary user. It is assumed that the primary user and secondary users operate under statistical quality of service (QoS) constraints imposed as limitations on the buffer size. In this setting, we characterize the effective capacity for both primary user and the secondary users under different selection methods. The impacts of the secondary user selection method, the number of secondary users, QoS constraints on the performance of both the primary user and secondary users are investigated. We interestingly show that for a large number of secondary users, the performance of the primary user is not affected by the selection method in the interference-limited regime.

Original languageEnglish (US)
Title of host publication2013 IEEE Global Communications Conference, GLOBECOM 2013
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages3784-3789
Number of pages6
ISBN (Print)9781479913534
DOIs
StatePublished - Jan 1 2013
Event2013 IEEE Global Communications Conference, GLOBECOM 2013 - Atlanta, GA, United States
Duration: Dec 9 2013Dec 13 2013

Publication series

NameGLOBECOM - IEEE Global Telecommunications Conference

Other

Other2013 IEEE Global Communications Conference, GLOBECOM 2013
CountryUnited States
CityAtlanta, GA
Period12/9/1312/13/13

Keywords

  • Cognitive radio
  • QoS constraints
  • effective capacity
  • multiple access channel
  • secondary user selection
  • spectrum sharing

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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