Title :
Four-Way Relaying in Wireless Cellular Systems
Author :
Huaping Liu ; Popovski, Petar ; de Carvalho, Elisabeth ; Zhao, Yiwen ; Sun, Felice
Author_Institution :
State Key Lab. of Adv. Opt. Commun. Syst. & Networks, Peking Univ., Beijing, China
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 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.
Keywords :
cellular radio; decode and forward communication; multi-access systems; relay networks (telecommunication); telecommunication traffic; MS; base stationn; decode-and-forward operational model; four-way relaying scenario; four-way traffic pattern; information flows; mobile stations; rate region; relay station; two-phase transmission scheme; two-way connection; two-way relaying; wireless cellular systems; Relaying; decode-and-forward; rate region;
Journal_Title :
Wireless Communications Letters, IEEE
DOI :
10.1109/WCL.2013.050613.130225