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Optimal channel assignment and power allocation for dual-hop multi-channel multi-user relaying

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3 Author(s)
Mahdi Hajiaghayi ; Dept. of Electrical and Computer Engineering, University of Toronto, Canada ; Min Dong ; Ben Liang

We consider the problem of jointly optimizing channel pairing, channel-user assignment, and power allocation in a single-relay multiple-access system. The optimization objective is to maximize the weighted sum-rate under total and individual power constraints on the transmitters. By observing the special structure of a three-dimensional assignment problem derived from the original problem, we propose a polynomial-time algorithm based on continuity relaxation and dual minimization. The proposed method is shown to be optimal for all relaying strategies that give a concave rate function in terms of power constraints.

Published in:

INFOCOM, 2011 Proceedings IEEE

Date of Conference:

10-15 April 2011