Power allocation for multi-access two-way relaying

Min Chen, Aylin Yener

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    12 Scopus citations


    We consider a multi-access two-way relay network where multiple pairs of users exchange information with their pre-assigned partners with the assistance of an intermediate relay node. Each pair is assumed to have a shared channel which is orthogonal to the channels used by the remaining pairs. We investigate the relay power allocation problem for two-way relaying protocols that allow a variety of forwarding mechanisms, such as decode-and-superposition-forward (DSF), decode-and-XOR-forward (DXF), amplify-and-forward (AF) and compress-and-forward (CF). Different from one-way communications, in two-way relaying, the rates of the two communication directions between a pair of partners constrain each other, and the relay power allocated to one user pair simultaneously affects the rates of both directions. For each relaying scheme, we solve the problem of optimally allocating relay's power among the user pairs such that an arbitrary weighted sum rate of all users is maximized. Simulation results are presented to demonstrate performance of optimum relay power allocation, as well as the comparison among different two-way relaying schemes.

    Original languageEnglish (US)
    Title of host publicationProceedings - 2009 IEEE International Conference on Communications, ICC 2009
    StatePublished - Nov 19 2009
    Event2009 IEEE International Conference on Communications, ICC 2009 - Dresden, Germany
    Duration: Jun 14 2009Jun 18 2009

    Publication series

    NameIEEE International Conference on Communications
    ISSN (Print)0536-1486


    Other2009 IEEE International Conference on Communications, ICC 2009

    All Science Journal Classification (ASJC) codes

    • Computer Networks and Communications
    • Electrical and Electronic Engineering


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