Joint source and relay power optimization in multiuser cooperative wireless networks

This paper considers the minimization of overall power transmitted from source and relay nodes in a multiuser cooperative network, constrained with the quality of service (QoS) of each user determined by their output signal-to-interference-plus-noise ratio (SINR). In this paper, we consider a two-hop cooperative wireless network consisting of single-antenna nodes in which multiple concurrent links are relayed by a number of cooperative nodes. Unlike the previous relevant works that either consider the source power or relay weight optimization or their joint optimization in a separate sense, this paper considers them in the same platform and thus achieves overall transmit power minimization. It is shown that optimized power distribution over the source and relay nodes depends on the channel conditions and thus requires joint optimization operation as proposed in this paper. Compared to the previously developed schemes, the joint power optimization developed in this paper offers significant transmit power reduction and QoS satisfactions.

[1]  Elza Erkip,et al.  User cooperation diversity. Part I. System description , 2003, IEEE Trans. Commun..

[2]  A. Wittneben,et al.  Cooperative Distributed Multiuser MMSE Relaying in Wireless Ad-Hoc Networks , 2005, Conference Record of the Thirty-Ninth Asilomar Conference onSignals, Systems and Computers, 2005..

[3]  Yimin Zhang,et al.  Joint Source Power Scheduling and Distributed Relay Beamforming in Multiuser Cooperative Wireless Networks , 2009, GLOBECOM 2009 - 2009 IEEE Global Telecommunications Conference.

[4]  Helmut Bölcskei,et al.  Capacity scaling laws in MIMO relay networks , 2006, IEEE Transactions on Wireless Communications.

[5]  Shahram Shahbazpanahi,et al.  Distributed peer-to-peer beamforming for multiuser relay networks , 2009, 2009 IEEE International Conference on Acoustics, Speech and Signal Processing.

[6]  Helmut Bölcskei,et al.  Realizing MIMO gains without user cooperation in large single-antenna wireless networks , 2004, International Symposium onInformation Theory, 2004. ISIT 2004. Proceedings..

[7]  Takahiro Asai,et al.  Relay Techniques for MIMO Wireless Networks with Multiple Source and Destination Pairs , 2006, EURASIP J. Wirel. Commun. Netw..

[8]  Xin Li,et al.  Distributed beamforming in multi-user cooperative wireless networks , 2009, 2009 Fourth International Conference on Communications and Networking in China.