Cognitive spectrum access in macro-femto heterogeneous networks

Lu Yang, S. H. Song, Khaled Letaief

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

5 Citations (Scopus)

Abstract

Deploying femtocells over the conventional macrocell network is a promising way to increase network capacity, whereas the main bottleneck is the interference between the femtocell and macrocell tiers. Recent research has proposed many effective methods for cross-tier interference mitigation, but unfortunately, the optimal spectrum access scheme remains unknown. In this paper, a cognitive spectrum access scheme is proposed, where each femtocell can dynamically explore and access the idle macro-tier spectrum besides its dedicated femto-tier spectrum. The optimum probabilities for each femtocell to access the femto-tier and idle macro-tier spectrum which maximize the area spectral efficiency (ASE) are investigated. With perfect spectrum sensing, the ratio between the optimum probabilities to access the femto-tier and macro-tier spectrum is equal to the amounts of available subchannels in the femto-tier and macro-tier spectrum for most cases. With non-perfect spectrum sensing, a lower bound of the optimum probability to access the femto-tier spectrum is determined, which is a piecewise function of the femtocell intensity. Simulation results validate the accuracy of our analytical results and reveal the advantages of the proposed scheme over existing schemes.

Original languageEnglish
Title of host publication2014 IEEE Global Communications Conference, GLOBECOM 2014
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages4269-4274
Number of pages6
ISBN (Electronic)9781479935116
DOIs
Publication statusPublished - 9 Feb 2014
Externally publishedYes
Event2014 IEEE Global Communications Conference, GLOBECOM 2014 - Austin, United States
Duration: 8 Dec 201412 Dec 2014

Other

Other2014 IEEE Global Communications Conference, GLOBECOM 2014
CountryUnited States
CityAustin
Period8/12/1412/12/14

Fingerprint

Femtocell
Heterogeneous networks
Macros
interference
efficiency
simulation

Keywords

  • Area spectral efficiency
  • Cognitive spectrum access
  • Femtocell network

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Computer Networks and Communications
  • Communication

Cite this

Yang, L., Song, S. H., & Letaief, K. (2014). Cognitive spectrum access in macro-femto heterogeneous networks. In 2014 IEEE Global Communications Conference, GLOBECOM 2014 (pp. 4269-4274). [7037478] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/GLOCOM.2014.7037478

Cognitive spectrum access in macro-femto heterogeneous networks. / Yang, Lu; Song, S. H.; Letaief, Khaled.

2014 IEEE Global Communications Conference, GLOBECOM 2014. Institute of Electrical and Electronics Engineers Inc., 2014. p. 4269-4274 7037478.

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

Yang, L, Song, SH & Letaief, K 2014, Cognitive spectrum access in macro-femto heterogeneous networks. in 2014 IEEE Global Communications Conference, GLOBECOM 2014., 7037478, Institute of Electrical and Electronics Engineers Inc., pp. 4269-4274, 2014 IEEE Global Communications Conference, GLOBECOM 2014, Austin, United States, 8/12/14. https://doi.org/10.1109/GLOCOM.2014.7037478
Yang L, Song SH, Letaief K. Cognitive spectrum access in macro-femto heterogeneous networks. In 2014 IEEE Global Communications Conference, GLOBECOM 2014. Institute of Electrical and Electronics Engineers Inc. 2014. p. 4269-4274. 7037478 https://doi.org/10.1109/GLOCOM.2014.7037478
Yang, Lu ; Song, S. H. ; Letaief, Khaled. / Cognitive spectrum access in macro-femto heterogeneous networks. 2014 IEEE Global Communications Conference, GLOBECOM 2014. Institute of Electrical and Electronics Engineers Inc., 2014. pp. 4269-4274
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