Relay selection in bidirectional relay communication

Tobias J. Oechtering, Holger Boche

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

8 Scopus citations

Abstract

We consider the problem of relay selection in a scenario with N relay nodes. A half-duplex relay node enables bidirectional communication between two nodes with a spectral efficient two phase protocol. In the first phase, both nodes transmit a message to a relay node, which decodes the messages and broadcasts a composition in the succeeding phase. The relay selection criteria decides for any bidirectional rate pair on the boundary of the achievable rate region for the relay node which achieves the largest weighted rate sum. With time-sharing between the usage of relay nodes the achievable rate region can be further increased. In a iid Rayleigh fading scenario relay selection realizes multi-user space diversity so that the sum-rate of any rate pair on the boundary of the ergodic rate region scales like O(log(log(N))).

Original languageEnglish
Title of host publicationSPAWC 2007 - 8th IEEE Workshop on Signal Advances in Wireless Communications
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Print)1424409551, 9781424409556
DOIs
StatePublished - 2007
Externally publishedYes
Event8th IEEE Signal Processing Advances in Wireless Communications, SPAWC 2007 - Helsinki, Finland
Duration: 17 Jun 200720 Jun 2007

Publication series

NameIEEE Workshop on Signal Processing Advances in Wireless Communications, SPAWC

Conference

Conference8th IEEE Signal Processing Advances in Wireless Communications, SPAWC 2007
Country/TerritoryFinland
CityHelsinki
Period17/06/0720/06/07

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