Energy efficiency and spectrum efficiency balance of wireless relay networks

A new method to improve Energy Efficiency (EE) in an energy-constrained wireless relay network is presented. In this network, the source nodes transmits signals through flat fading channels to a set of intermediate relay nodes which amplify signals and then forward them to the destination through other flat fading channels. The distances among source relay and destination are considered. Since the total network energy enhancement depend on the relay energy consumption which in turn depends on the users transmit powers and the geographic of relays location, the proposal method aims to optimize relay location for improving EE with the lowest sacrifice in the Spectrum Efficiency (SE). Analytical expressions for optimal relay location with balanced EE SE are derived and fully verified by simulation results.

[1]  Geoffrey Ye Li,et al.  Fundamental trade-offs on green wireless networks , 2011, IEEE Communications Magazine.

[2]  B. Wei,et al.  Performance Analysis of Layer 1 Relays , 2009, 2009 IEEE International Conference on Communications Workshops.

[3]  Georgios B. Giannakis,et al.  On energy efficiency and optimum resource allocation of relay transmissions in the low-power regime , 2005, IEEE Transactions on Wireless Communications.

[4]  Chenyang Yang,et al.  Energy Efficient OFDM Relay Systems , 2013, IEEE Transactions on Communications.

[5]  Lingyang Song,et al.  Selective combining for hybrid cooperative networks , 2014, IET Commun..

[6]  Chenyang Yang,et al.  Energy efficiency analysis of one-way and two-way relay systems , 2012, EURASIP J. Wirel. Commun. Netw..

[7]  Yonghui Li,et al.  Transparent Relaying Techniques , 2010 .

[8]  Wayne E. Stark,et al.  Energy-Bandwidth Efficiency Tradeoff in MIMO Multi-Hop Wireless Networks , 2011, IEEE Journal on Selected Areas in Communications.

[9]  Andreas F. Molisch,et al.  Energy-Efficient Cooperative Relaying over Fading Channels with Simple Relay Selection , 2008, IEEE Transactions on Wireless Communications.

[10]  Wayne E. Stark,et al.  End-to-End Energy–Bandwidth Tradeoff in Multihop Wireless Networks , 2009, IEEE Transactions on Information Theory.

[11]  Lutz Lampe,et al.  Green Radio Communication Networks: Cooperative techniques for energy-efficient wireless communications , 2012 .

[12]  Abbas Jamalipour,et al.  Wireless communications , 2005, GLOBECOM '05. IEEE Global Telecommunications Conference, 2005..

[13]  Rose Qingyang Hu,et al.  Energy Efficiency and Spectrum Efficiency of Multihop Device-to-Device Communications Underlaying Cellular Networks , 2016, IEEE Transactions on Vehicular Technology.

[14]  Tiankui Zhang,et al.  Energy-efficient relay selection and power allocation scheme in AF relay networks with bidirectional asymmetric traffic , 2011, 2011 The 14th International Symposium on Wireless Personal Multimedia Communications (WPMC).

[15]  Yong Li,et al.  Energy-efficient power allocation for two-hop relay networks , 2014 .

[16]  Cong Xiong,et al.  Energy- and Spectral-Efficiency Tradeoff in Downlink OFDMA Networks , 2011, IEEE Trans. Wirel. Commun..

[17]  Gaston H. Gonnet,et al.  On the LambertW function , 1996, Adv. Comput. Math..

[18]  Shugong Xu,et al.  Green Radio Communication Networks: Fundamental trade-offs on the design of green radio networks , 2012 .

[19]  Shugong Xu,et al.  Characterizing Energy Efficiency and Deployment Efficiency Relations for Green Architecture Design , 2010, 2010 IEEE International Conference on Communications Workshops.

[20]  Yindi Jing,et al.  Network beamforming using relays with perfect channel information , 2009, IEEE Trans. Inf. Theory.

[21]  C. P. Tou,et al.  On efficient spectrum utilization from the standpoint of communication theory , 1980, Proceedings of the IEEE.

[22]  Francisco R. P. Cavalcanti,et al.  Power Control for Wireless Networks: Conventional and QoS-Flexible Approaches , 2009 .

[23]  Hongbin Li,et al.  Distributed modulation for cooperative wireless communications , 2006, IEEE Signal Processing Magazine.

[24]  Taufik Abrão,et al.  Interference-Limited Fixed Relaying-Aided Macrocellular CDMA Networks , 2013 .

[25]  Gregory W. Wornell,et al.  An efficient protocol for realizing cooperative diversity in wireless networks , 2001, Proceedings. 2001 IEEE International Symposium on Information Theory (IEEE Cat. No.01CH37252).