Cognitive spectrum access in two-tier femtocell networks

L. Yang, S. H. Song, Khaled Letaief

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

6 Citations (Scopus)

Abstract

The deployment of femtocells in a conventional cellular network is a promising way to increase network capacity, whereas the main bottleneck is the interference between and within tiers. Previous work proposed channel splitting and F-ALOHA to manage the cross-tier and co-tier interference, respectively. However, such spectrum allocation scheme is not efficient given the often scenarios where part of the macro-tier spectrum is vacant but the femto-tier spectrum is overused. In this paper, a cognitive spectrum access scheme is proposed, where femtocells can access both femto-tier and macro-tier spectrum with certain probabilities, to increase the area spectral efficiency (ASE). The closed-form expressions of the optimum spectrum access probabilities in maximizing the ASE are derived for two scenarios where macrocell base stations (MBSs) are modeled as Poisson point process (PPP) and periodic grid. Analytical results reveal that for most cases, the ratio between the optimum probabilities for femtocells to access the femto-tier and macro-tier spectrum is equal to the ratio between the number of subchannels in the femto-tier and idle macro-tier spectrum. Simulation results show that with both models, the proposed scheme outperforms previous work in terms of the ASE.

Original languageEnglish
Title of host publication2014 IEEE International Conference on Communications, ICC 2014
PublisherIEEE Computer Society
Pages5354-5359
Number of pages6
ISBN (Print)9781479920037
DOIs
Publication statusPublished - 2014
Externally publishedYes
Event2014 1st IEEE International Conference on Communications, ICC 2014 - Sydney, NSW
Duration: 10 Jun 201414 Jun 2014

Other

Other2014 1st IEEE International Conference on Communications, ICC 2014
CitySydney, NSW
Period10/6/1414/6/14

Fingerprint

Femtocell
Macros
Base stations

Keywords

  • area spectral efficiency
  • cognitive radio
  • spectrum access
  • Two-tier femtocell networks

ASJC Scopus subject areas

  • Computer Networks and Communications

Cite this

Yang, L., Song, S. H., & Letaief, K. (2014). Cognitive spectrum access in two-tier femtocell networks. In 2014 IEEE International Conference on Communications, ICC 2014 (pp. 5354-5359). [6884172] IEEE Computer Society. https://doi.org/10.1109/ICC.2014.6884172

Cognitive spectrum access in two-tier femtocell networks. / Yang, L.; Song, S. H.; Letaief, Khaled.

2014 IEEE International Conference on Communications, ICC 2014. IEEE Computer Society, 2014. p. 5354-5359 6884172.

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

Yang, L, Song, SH & Letaief, K 2014, Cognitive spectrum access in two-tier femtocell networks. in 2014 IEEE International Conference on Communications, ICC 2014., 6884172, IEEE Computer Society, pp. 5354-5359, 2014 1st IEEE International Conference on Communications, ICC 2014, Sydney, NSW, 10/6/14. https://doi.org/10.1109/ICC.2014.6884172
Yang L, Song SH, Letaief K. Cognitive spectrum access in two-tier femtocell networks. In 2014 IEEE International Conference on Communications, ICC 2014. IEEE Computer Society. 2014. p. 5354-5359. 6884172 https://doi.org/10.1109/ICC.2014.6884172
Yang, L. ; Song, S. H. ; Letaief, Khaled. / Cognitive spectrum access in two-tier femtocell networks. 2014 IEEE International Conference on Communications, ICC 2014. IEEE Computer Society, 2014. pp. 5354-5359
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