Open Access

Interference Management Schemes for the Shared Relay Concept

  • Ali Y. Panah1Email author,
  • Kien T. Truong1,
  • Steven W. Peters1 and
  • Robert W. HeathJr.1
EURASIP Journal on Advances in Signal Processing20102011:269817

https://doi.org/10.1155/2011/269817

Received: 30 June 2010

Accepted: 8 September 2010

Published: 15 September 2010

Abstract

Sharing a multiantenna relay among several sectors is a simple and cost-effective way to achieving much of the gains of local interference mitigation in cellular networks. Next generation wireless systems, such as ones based on the Third Generation Partnership Projects Long-Term Evolution Advanced, will employ universal frequency reuse to simplify network deployment. This strategy is anticipated to create significant cell-edge interference in the location of the shared relays, thus rendering advanced interference management strategies a necessity. This paper proposes several interference management strategies for the shared relays ranging from simple channel inversion at the relay, to more sophisticated techniques based on channel inversion in combination with partial and full base station coordination in the downlink and uplink. Given that the relay functionality influences total interference, both amplify-and-forward and decode-and-forward type relays are considered throughout. In this context, channel cancelation techniques are investigated for one-way relaying and also the spectrally efficient two-way relaying protocol. Simulations show that strategies based on two-way shared relaying with bidirectional channel inversion at the relay often perform best in terms of total system throughput while one-way techniques are promising when the relay power is low.

Keywords

Frequency ReuseInterference MitigationInterference ManagementChannel InversionCancelation Technique

Publisher note

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Authors’ Affiliations

(1)
Department of Electrical and Computer Engineering, The University of Texas at Austin, Austin, USA

Copyright

© Ali Y. Panah et al. 2011

This article is published under license to BioMed Central Ltd. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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