NDLI: Distributed relay selection strategy based on physical-layer fairness for amplify-and-forward relaying systems

Content Provider	IET Digital Library
Author	Zhao, Haifeng Pan, Zhibin
Abstract	For relay terminals in wireless communication systems, the difference of the power consumed for relaying signals means unfairness, which may reduce the network lifetime when the system is energy-constrained. Classic opportunistic relay selections always cause unequal power consumption among all relays. In this study, the authors propose a novel distributed relay selection strategy, named the fair opportunistic relay selection (FORS) strategy, for amplify-and-forward (AF) opportunistic cooperative systems. The FORS strategy is designed based on physical-layer fairness that means all available relays cumulatively consume equal power. They use a set of weight coefficients to adjust the channel fading coefficients effectively and then change the selection probabilities for all relays on the basis of proportional fair scheduling. Considering that the ‘optimal’ relay can be selected proactively in quasi-static Rayleigh fading channels based on local channel state information, the overhead of the proposed scheme is small. Then, they analyse the performance of the FORS strategy and provide an exact analytical expression for the outage probability (P out) and the average symbol error probability. Numerical simulation results validate their analysis. The results show that the FORS strategy approximately achieves the upper bound of physical-layer fairness in the AF relaying system.
Starting Page	2261
Ending Page	2268
Page Count	8
ISSN	17518628
Volume Number	10
e-ISSN	17518636
Issue Number	Issue 17, Nov (2016)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-com/10/17
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-com.2016.0268
Journal	IET Communications
Publisher Date	2016-11-24
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	AF Relaying System Amplify And Forward Communication Amplify-and-forward Opportunistic Cooperative System Amplify-and-forward Relaying System Channel Fading Coefficient Channel State Information Cooperative Communication Distributed Relay Selection Strategy Energy-constraint Error Statistics Fair Opportunistic Relay Selection FORS Strategy Network Lifetime Reduction Opportunistic Relay Selection Optimal Relay Outage Probability Physical-layer Fairness Power Consumption Probability Proportional Fair Scheduling Quasistatic Rayleigh Fading Channel Radio Link And Equipment Rayleigh Channel Relay Network Relay Terminal Reliability Statistics Symbol Error Probability Telecommunication Telecommunication Network Reliability Telecommunication Scheduling Wireless Communication System
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering Computer Science Applications

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