Energy-efficient relaying technique for two-hop diamond networks

Energy-efficiency (EE) is a critical metric in many types of wireless networks and is getting increasingly important for new technologies. In this paper, the authors propose an energy-efficient decode-and-forward relaying strategy for two-hop diamond networks where the source–destination communication is established by the help of two relays which have an inter-relay link. The inter-relay link gives the opportunity of correcting the data packet between relays if only one of them decodes the packet that is received from the source correctly. Hence, both relays are able to send the data packet to the destination with distributed Alamouti coding which provides multipath diversity. In addition, they introduce optimum data rate adaptation for each link separately to maximise EE for the considered network. By exploiting diversity and optimum rate adaptation, it is possible to transmit at higher rates with reasonable outage probability which has critical effects on EE and throughput. They show via computer simulations that the proposed technique is substantially more energy-efficient and has a better throughput than the successive relaying technique given in the literature; moreover, more robust to the changes in system conditions, i.e. relay location and transmission power level.

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

[2]  Shuguang Cui,et al.  Energy-Efficient Cooperative Communication in a Clustered Wireless Sensor Network , 2008, IEEE Transactions on Vehicular Technology.

[3]  Gerhard Fettweis,et al.  Framework for Link-Level Energy Efficiency Optimization with Informed Transmitter , 2012, IEEE Trans. Wirel. Commun..

[4]  Chi Wan Sung,et al.  Achieving the Outage Capacity of the Diamond Relay Network to Within One Bit and Even Less , 2011, IEEE Transactions on Vehicular Technology.

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

[6]  Cong Xiong,et al.  Energy-efficient wireless communications: tutorial, survey, and open issues , 2011, IEEE Wireless Communications.

[7]  Andrea J. Goldsmith,et al.  Energy-efficiency of MIMO and cooperative MIMO techniques in sensor networks , 2004, IEEE Journal on Selected Areas in Communications.

[8]  Armin Wittneben,et al.  Spectral efficient protocols for half-duplex fading relay channels , 2007, IEEE Journal on Selected Areas in Communications.

[9]  Geoffrey Ye Li,et al.  Energy-efficient link adaptation in frequency-selective channels , 2010, IEEE Transactions on Communications.

[10]  Leonard J. Cimini,et al.  Energy-efficient cooperative beamforming in clustered wireless networks , 2013, IEEE Transactions on Wireless Communications.

[11]  Lutz H.-J. Lampe,et al.  Opportunistic Energy Efficient Cooperative Communication , 2012, IEEE Wireless Communications Letters.

[12]  Qinye Yin,et al.  Energy-Effective Relay Selection by Utilizing Spacial Diversity for Random Wireless Sensor Networks , 2013, IEEE Communications Letters.

[13]  Muhammad Ali Imran,et al.  Energy-Efficient Power Allocation for Point-to-Point MIMO Systems over the Rayleigh Fading Channel , 2012, IEEE Wireless Communications Letters.

[14]  Shuguang Cui,et al.  Energy-Efficient Cooperative Communication Based on Power Control and Selective Single-Relay in Wireless Sensor Networks , 2008, IEEE Transactions on Wireless Communications.

[15]  Geoffrey Ye Li,et al.  A survey of energy-efficient wireless communications , 2013, IEEE Communications Surveys & Tutorials.

[16]  Mohamed Adnan Landolsi Signal Design for Improved Multiple Access Capacity in DS-UWB Communication , 2015, Wirel. Pers. Commun..

[17]  Geoffrey Ye Li,et al.  Simplified Relay Selection and Power Allocation in Cooperative Cognitive Radio Systems , 2011, IEEE Transactions on Wireless Communications.

[18]  Qinye Yin,et al.  Performance Analysis and Optimization for Energy-Efficient Cooperative Transmission in Random Wireless Sensor Network , 2013, IEEE Transactions on Wireless Communications.

[19]  Lu Lv,et al.  Energy efficient relay selection and power allocation for cooperative cognitive radio networks , 2015, IET Commun..

[20]  Gregory W. Wornell,et al.  Distributed space-time-coded protocols for exploiting cooperative diversity in wireless networks , 2003, IEEE Trans. Inf. Theory.

[21]  Andrea J. Goldsmith,et al.  Energy-constrained modulation optimization , 2005, IEEE Transactions on Wireless Communications.

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