Achieving Net Feedback Gain in the Linear-Deterministic Butterfly Network with a Full-Duplex Relay

  • Anas Chaaban
  • Aydin Sezgin
  • Daniela Tuninetti

Abstract

A symmetric butterfly network (BFN) with a full-duplex relay operating in a bi-directional fashion for feedback is considered. This network is relevant for a variety of wireless networks, including cellular systems dealing with cell-edge users. Upper bounds on the capacity region of the general memoryless BFN with feedback are derived based on cut-set and cooperation arguments and then specialized to the linear deterministic BFN with relay-source feedback. It is shown that the upper bounds are achievable using combinations of the compute-forward strategy and the classical decode-and-forward strategy, thus fully characterizing the capacity region. It is shown that net rate gains are possible in certain parameter regimes.

Keywords

butterfly network interference relay channel with feedback capacity inner bound outer bound 

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Copyright information

© Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  • Anas Chaaban
    • 1
  • Aydin Sezgin
    • 1
  • Daniela Tuninetti
    • 2
  1. 1.Ruhr-University of BochumBochumGermany
  2. 2.University of Illinois at ChicagoChicagoUSA

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