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Regenerative Strategy for Fairness in Bidirectional ThreeNode Relaying
Ning HU Xiaofeng ZHONG Ming ZHAO Jing WANG
Publication
IEICE TRANSACTIONS on Communications
Vol.E91B
No.8
pp.27362739 Publication Date: 2008/08/01 Online ISSN: 17451345
DOI: 10.1093/ietcom/e91b.8.2736 Print ISSN: 09168516 Type of Manuscript: LETTER Category: Wireless Communication Technologies Keyword: bidirectional relaying, fairness, network coding, power optimization, regenerative strategy,
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Summary:
The fairness solution without deteriorating the system sumrate is a challenge under a total energy constraint. One regenerative strategy is proposed to improve the fairness for bidirectional threenode relaying, which is based on decodeandforward technique with network coding and power optimization. In this letter, the application of network coding decreases the number of transmission phases from traditional four phases to three phases. Moreover, the proposed power optimization algorithm can be applied in practical system, which transforms maxmin optimization problem to linear programming (LP) with low complexity. Numerical simulations shows this strategy enhances the minimum of unidirectional transmission rate up to 94% as compared to a fourphase bidirectional strategy, and up to 46% as compared to the threephase bidirectional strategy with equalpower allocation.


