Utility-based subchannel allocation for OFDMA femtocell networks

Byung Gook Kim, Jeong Ahn Kwon, Jang Won Lee

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

11 Citations (Scopus)

Abstract

In femtocell networks, due to their small cell size, we can achieve higher spatial diversity from the channel reuse between multiple femtocells. In addition, if femtocells are operated on OFDMA systems, each subchannel can be reused separately among femtocells by carefully treating inter-cell interferences. However, due to a large number of femtocells and their uncoordinated and irregular deployment, we need to treat intercell interferences very carefully in OFDMA-based fmetocell networks, which make developing efficient resource allocation schemes more difficult. In this paper, we study a subchannel allocation problem that aims at maximizing the sum utility of the OFDMA-based femtocell network. Since the problem is formulated as a nonlinear integer programming, which is inherently difficult to solve, we propose a suboptimal subchannel allocation algorithm. The proposed subchannel allocation algorithm consists of two steps: calculating the number of subchannels that should be granted to each femtocell to maximize the sum utility and finding actual subchannel allocation that achieves the granted number of subchannels for each femtocell. Numerical results show that the proposed subchannel allocation algorithm provides near-optimal performance.

Original languageEnglish
Title of host publication2011 20th International Conference on Computer Communications and Networks, ICCCN 2011 - Proceedings
DOIs
Publication statusPublished - 2011 Sep 26
Event2011 20th International Conference on Computer Communications and Networks, ICCCN 2011 - Maui, HI, United States
Duration: 2011 Jul 312011 Aug 4

Publication series

NameProceedings - International Conference on Computer Communications and Networks, ICCCN
ISSN (Print)1095-2055

Other

Other2011 20th International Conference on Computer Communications and Networks, ICCCN 2011
CountryUnited States
CityMaui, HI
Period11/7/3111/8/4

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All Science Journal Classification (ASJC) codes

  • Computer Networks and Communications
  • Hardware and Architecture
  • Software

Cite this

Kim, B. G., Kwon, J. A., & Lee, J. W. (2011). Utility-based subchannel allocation for OFDMA femtocell networks. In 2011 20th International Conference on Computer Communications and Networks, ICCCN 2011 - Proceedings [6006068] (Proceedings - International Conference on Computer Communications and Networks, ICCCN). https://doi.org/10.1109/ICCCN.2011.6006068