Best relay selection using SNR and interference quotient for underlay cognitive networks

Syed Imtiaz Hussain, Mohamed M. Abdallah, Mohamed Slim Alouini, Mazen Hasna, Khalid Qaraqe

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

21 Citations (Scopus)

Abstract

Cognitive networks in underlay settings operate simultaneously with the primary networks satisfying stringent interference limits. This condition forces them to operate with low transmission powers and confines their area of coverage. In an effort to reach remote destinations, underlay cognitive sources make use of relaying techniques. Selecting the best relay among those who are ready to cooperate is different in underlay settings than traditional non-cognitive networks. In this paper, we present a relay selection scheme which uses the quotient of the relay link signal to noise ratio (SNR) and the interference generated from the relay to the primary user to choose the best relay. The proposed scheme optimizes this quotient in a way to maximize the relay link SNR above a certain value whereas the interference is kept below a defined threshold. We derive closed expressions for the outage probability and bit error probability of the system incorporating this scheme. Simulation results confirm the validity of the analytical results and reveal that the relay selection in cognitive environment is feasible in low SNR regions.

Original languageEnglish
Title of host publication2012 IEEE International Conference on Communications, ICC 2012
Pages4176-4180
Number of pages5
DOIs
Publication statusPublished - 1 Dec 2012
Event2012 IEEE International Conference on Communications, ICC 2012 - Ottawa, ON, Canada
Duration: 10 Jun 201215 Jun 2012

Publication series

NameIEEE International Conference on Communications
ISSN (Print)1550-3607

Other

Other2012 IEEE International Conference on Communications, ICC 2012
CountryCanada
CityOttawa, ON
Period10/6/1215/6/12

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ASJC Scopus subject areas

  • Computer Networks and Communications
  • Electrical and Electronic Engineering

Cite this

Hussain, S. I., Abdallah, M. M., Alouini, M. S., Hasna, M., & Qaraqe, K. (2012). Best relay selection using SNR and interference quotient for underlay cognitive networks. In 2012 IEEE International Conference on Communications, ICC 2012 (pp. 4176-4180). [6364463] (IEEE International Conference on Communications). https://doi.org/10.1109/ICC.2012.6364463