Coordination of Regenerative Relays and Direct Users in Wireless Cellular Networks

Chan Thai, Petar Popovski

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3 Citationer (Scopus)

Abstract

The area of wireless cooperation/relaying has recently been significantly enriched by the ideas of wireless network coding (NC), which bring substantial gains in spectral efficiency. These gains have mainly been demonstrated in scenarios with two-way relaying. Inspired by the ideas of wireless NC, recently we have proposed techniques for coordinated direct/relay (CDR) transmissions. These techniques embrace the interference among the communication flows to/from direct and relayed users, leveraging on the fact that the interference can be subsequently canceled. Hence, by allowing simultaneous transmissions, spectral efficiency is increased. In our prior work, we have considered CDR with non-regenerative relay that uses Amplify-and-Forward (AF). In this paper we consider the case of regenerative Decode-and-Forward (DF) relay. This refers also to joint decoding of the interfering flows received over a multiple-access channel. Our analysis shows that the assumption of regenerative relaying brings new parametrization of the CDR schemes, such that the the transmission times used by each node are subject to optimization. We show how these parameters should be chosen if the sum-rate needs to be optimized. Our results confirm the high gains in spectral efficiency over the reference schemes.
OriginalsprogEngelsk
TitelWireless Communication Systems (ISWCS) : 2011 8th International Symposium
Antal sider5
ForlagIEEE
Publikationsdato2011
Sider819-823
ISBN (Trykt)978-1-61284-401-5
ISBN (Elektronisk)978-1-61284-401-5
DOI
StatusUdgivet - 2011
BegivenhedIEEE: 2011 8th International Symposium on Wireless Communication Systems - Aachen, Tyskland
Varighed: 6 nov. 20119 nov. 2011
Konferencens nummer: 18287

Konference

KonferenceIEEE
Nummer18287
Land/OmrådeTyskland
ByAachen
Periode06/11/201109/11/2011

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