7th International Conference on Cognitive Radio Oriented Wireless Networks

Research Article

On TDD cross-tier in-band interference mitigation: a practical example

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  • @INPROCEEDINGS{10.4108/icst.crowncom.2012.248599,
        author={Michal Cierny and Risto Wichman and Jyri H\aa{}m\aa{}l\aa{}inen and Cassio Ribeiro and Zhi Ding and Xin Liu},
        title={On TDD cross-tier in-band interference mitigation: a practical example},
        proceedings={7th International Conference on Cognitive Radio Oriented Wireless Networks},
        publisher={IEEE},
        proceedings_a={CROWNCOM},
        year={2012},
        month={7},
        keywords={heterogeneous networks femtocell macrocell power control},
        doi={10.4108/icst.crowncom.2012.248599}
    }
    
  • Michal Cierny
    Risto Wichman
    Jyri Hämäläinen
    Cassio Ribeiro
    Zhi Ding
    Xin Liu
    Year: 2012
    On TDD cross-tier in-band interference mitigation: a practical example
    CROWNCOM
    IEEE
    DOI: 10.4108/icst.crowncom.2012.248599
Michal Cierny1, Risto Wichman1,*, Jyri Hämäläinen1, Cassio Ribeiro2, Zhi Ding3, Xin Liu3
  • 1: Aalto university
  • 2: Nokia research center
  • 3: University of California, Davis
*Contact email: risto.wichman@aalto.fi

Abstract

This work considers in-band interference that appears in two-tier macro/femto cellular networks when macrocells and femtocells operate on the same frequency band. We focus on the time division duplex (TDD) mode where uplink-downlink nterference occurs if time sharing between uplink and downlink are different in the overlaying macrocell and underlying femtocells. We derive an optimal power control based solution for a simple example scenario and then propose an extension for general multicell/multilink network. Finally, we show through simulations that the proposed solution can be used to mitigate the outage in the femtocell uplink without harming the macrocell layer.