Competition in femtocell networks: Strategic access policies in the uplink

Ali Khanafer, Walid Saad, Tamer Başar, Mérouane Debbah

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

7 Scopus citations


In emerging small cell wireless, each femtocell access point (FAP) can either service its home subscribers exclusively (i.e., closed access) or open its access to accommodate a number of macrocell users so as to reduce cross-tier interference. In this paper, we propose a game-theoretic framework that enables the FAPs to strategically decide on their uplink access policy. We formulate a noncooperative game in which the FAPs are the players that want to strategically decide on whether to use a closed or an open access policy in order to maximize the performance of their registered users. Each FAP aims at optimizing the tradeoff between reducing cross-tier interference, by admitting macrocell users, and the associated cost in terms of allocated resources. Using novel analytical techniques, we show that the game always admits a pure strategy Nash equilibrium, despite the discontinuities in the utility functions. Further, we propose a distributed algorithm that can be adopted by the FAPs to reach their equilibrium access policies. Simulation results show that the proposed algorithm provides an improvement of 85.4% relative to an optimized open access scheme in the average worst-case FAP utility.

Original languageEnglish (US)
Title of host publication2012 IEEE International Conference on Communications, ICC 2012
Number of pages5
StatePublished - 2012
Externally publishedYes
Event2012 IEEE International Conference on Communications, ICC 2012 - Ottawa, ON, Canada
Duration: Jun 10 2012Jun 15 2012

Publication series

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


Other2012 IEEE International Conference on Communications, ICC 2012
CityOttawa, ON

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Electrical and Electronic Engineering


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