Belief propagation methods for intercell interference coordination in femtocell networks

Sundeep Rangan, Ritesh Madan

Research output: Contribution to journalArticle

Abstract

Interference coordination is a fundamental challenge in emerging femtocellular deployments. This paper considers a broad class of interference coordination and resource allocation problems for wireless links based on utility maximization with a general linear mixing interference model suitable for complex femtocellular systems. The resulting optimization problems are typically hard to solve optimally even using centralized algorithms but are an essential computational step in implementing rate-fair and queue stabilizing scheduling policies in wireless networks. We consider a belief propagation framework to solve such problems approximately. In particular, we construct approximations to the belief propagation iterations to obtain computationally simple and distributed algorithms with low communication overhead. Notably, our methods are very general and apply to, semi-static and dynamic interference coordination problems including the optimization of transmit powers, transmit beamforming vectors, fractional frequency reuse (FFR) and sub-band allocations to maximize the above objective. Numerical results for femtocell deployments demonstrate that such algorithms compute a very good operating point in typically just a couple of iterations.

Original languageEnglish (US)
Article number6172003
Pages (from-to)631-640
Number of pages10
JournalIEEE Journal on Selected Areas in Communications
Volume30
Issue number3
DOIs
StatePublished - Apr 1 2012

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Keywords

  • Interference coordination
  • belief propagation
  • cellular systems
  • femtocells
  • wireless communications

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Electrical and Electronic Engineering

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