Spectrum sharing model for OFDMA macro-femtocell networks

Rebeca Estrada, Hadi Otrok, Zbigniew Dziong, Hassan Barada

Research output: Contribution to journalArticlepeer-review


Enhancing the network throughput while supporting non-uniform user distribution and dense femtocell deployment is a challenge in OFDMA networks. Previous research works focus on spectrum partitioning or spectrum sharing with interference managements regardless the user distribution or mobility. In this paper, we propose a spectrum sharing approach that maximises the network throughput using Linear Programming. Power adaptation is performed to mitigate the interference and to guarantee QoS downlink transmissions. Our solution is able to: 1) fairly allocate resources to each macrocell zone taking into account the user distribution; 2) optimally reuse the bandwidth allocated to inner MC zones inside femtocells located in outer zones; 3) optimally determine the serving base station, subcarriers and transmitted power for downlink transmissions taking into account user locations and demands. Simulations are conducted to show a comparison of our solution with two SP approaches with and without partial bandwidth reuse incorporating user mobility.

Original languageBritish English
Pages (from-to)241-253
Number of pages13
JournalInternational Journal of Ad Hoc and Ubiquitous Computing
Issue number3-4
StatePublished - 2015


  • Linear programming
  • OFDMA macro-femtocell networks
  • Power control
  • Subcarrier reuse


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