TY - JOUR
T1 - Four-Way Relaying in Wireless Cellular Systems
AU - Liu, Huaping
AU - Popovski, Petar
AU - De Carvalho, Elisabeth
AU - Zhao, Yuping
AU - Sun, Fan
PY - 2013/8
Y1 - 2013/8
N2 - 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 terminalsassociated 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.
AB - 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 terminalsassociated 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.
U2 - 10.1109/WCL.2013.050613.130225
DO - 10.1109/WCL.2013.050613.130225
M3 - Journal article
SN - 2162-2337
VL - 2
SP - 403
EP - 406
JO - IEEE Wireless Communications Letters
JF - IEEE Wireless Communications Letters
IS - 4
ER -