Four-Way Relaying in Wireless Cellular Systems

Huaping Liu, Petar Popovski, Elisabeth De Carvalho, Yuping Zhao, Fan Sun

Research output: Contribution to journalJournal articleResearchpeer-review

5 Citations (Scopus)
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Abstract

Two-way relaying in wireless systems has initiated a large research effort during the past few years. Nevertheless, it represents only a specific traffic pattern and it is of interest to investigate other traffic patterns where such a simultaneous processing of information flows can bring performance advantage.
In this paper we consider a \emph{four-way relaying} scenario, where each of the two Mobile Stations (MSs) has a two-way connection to the same Base Station (BS), while each connection is through a dedicated Relay Station (RS).
The RSs are placed in such a way that one RS and the terminals
associated with it do not interfere with the other RS, and vice versa.
We introduce and analyze a two-phase transmission scheme to serve the four-way traffic pattern defined in this scenario. Each phase consists of combined broadcast and multiple access. We analyze the achievable rate region of the new scheme for Decode-and-Forward (DF) operational model for the RS. We compare the performance with a state-of-the-art reference scheme, based on two-way relaying with DF. The results indicate that the achievable rate regions are significantly enlarged for the new scheme.
Original languageEnglish
JournalIEEE Wireless Communications Letters
Volume2
Issue number4
Pages (from-to)403 - 406
Number of pages3
ISSN2162-2337
DOIs
Publication statusPublished - Aug 2013

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