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

Michal Cierny; Risto Wichman; Jyri Hämäläinen; Cassio Ribeiro; Zhi Ding; Xin Liu

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.

Keywords: heterogeneous networks femtocell macrocell power control

Published: 2012-07-24
Publisher: IEEE

: http://dx.doi.org/10.4108/icst.crowncom.2012.248599