Distributed spectrum management in TV white space networks

Jocelyne Elias, Fabio Martignon, Lin Chen, Marwan Krunz

Research output: Contribution to journalReview article

6 Scopus citations

Abstract

We investigate the distributed spectrummanagement problem in opportunistic TV white space (TVWS) systems using a game theoretical approach that accounts for adjacent-channel interference and spatial reuse. TV band devices (TVBDs) compete to access idle TV channels and select channel "blocks" that optimize an objective function. This function provides a tradeoff between the achieved rate and a cost factor that depends on the interference between TVBDs.We consider practical cases where contiguous or noncontiguous channels can be accessed by TVBDs, imposing realistic constraints on the maximum frequency span between the aggregated/bonded channels. We show that under general conditions, the proposed TVWS management games admit a potential function. Accordingly, a "best response" strategy allows us to determine the spectrum assignment of all players. This algorithm is shown to converge in a few iterations to a Nash equilibrium. Furthermore, we propose an effective algorithm based on Imitation dynamics, where a TVBD probabilistically imitates successful selection strategies of other TVBDs in order to improve its objective function. Numerical results show that our game theoretical framework provides a very effective tradeoff (close to optimal, centralized spectrum allocations) between efficient TV spectrum use and reduction of interference between TVBDs.

Original languageEnglish (US)
Article number7530897
Pages (from-to)4161-4172
Number of pages12
JournalIEEE Transactions on Vehicular Technology
Volume66
Issue number5
DOIs
StatePublished - May 2017

Keywords

  • Channel bonding/aggregation
  • Game theory
  • Nash equilibrium (NE)
  • Spectrum management
  • TV white space (TVWS)

ASJC Scopus subject areas

  • Automotive Engineering
  • Aerospace Engineering
  • Electrical and Electronic Engineering
  • Applied Mathematics

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