NDLI: Energy cooperation in multi-user wireless-powered relay networks

Content Provider	IET Digital Library
Author	Yang, Dingcheng Zhou, Xiaoxiao Xiao, Lin Wu, Fahui
Abstract	In this study, energy cooperation schemes are considered in wireless cooperative networks; in these networks multiple pairs of users communicate with each other, assisted by an energy harvesting relay that gathers energy from the received signal by applying a power splitting scheme and forwards the received signal by using the harvested energy. This study is focused on the energy cooperation strategies for the relay to distribute the harvested energy between the multiple user pairs in amplify-and-forward and in decode-and-forward modes. Specifically, optimal solutions without energy cooperation at the relay node are first proposed and then the authors formulate the energy cooperation optimisation problem. This optimisation problem is non-convex. They propose an iterative energy cooperation solution to maximise the system throughput by assigning the proper harvested energy to each user pair for both types of forwarding models. They show that with the proposed method, the update in each iteration consists of a group of convex problems with a continuous parameter. Moreover, they derive the optimal solution to these convex problems in closed-form and it is shown that the solution can converge to a local optimum. Simulation results demonstrate that the proposed algorithm outperforms the traditional non-cooperation method.
Starting Page	1412
Ending Page	1420
Page Count	9
ISSN	17518628
Volume Number	9
e-ISSN	17518636
Issue Number	Issue 11, Jul (2015)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-com/9/11
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-com.2014.1100
Journal	IET Communications
Publisher Date	2015-05-27
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Amplify And Forward Communication Amplify-and-forward Modes Concave Programming Convex Problem Convex Programming Cooperative Communication Decode And Forward Communication Decode-and-forward Modes Energy Cooperation Optimisation Problem Energy Cooperation Scheme Energy Harvesting Energy Harvesting Relay Interpolation And Function Approximation Iterative Energy Cooperation Solution Iterative Method Local Optimum Multiuser Wireless-powered Relay Network Nonconvex Optimisation Problem Numerical Analysis Optimisation Technique Power Splitting Scheme Radio Link And Equipment Radio Network Received Signal Relay Network Telecommunication Telecommunication Power Supplies Wireless Cooperative Network
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering Computer Science Applications

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