Title :
Distributed Power Splitting for SWIPT in Relay Interference Channels Using Game Theory
Author :
He Chen ; Yonghui Li ; Yunxiang Jiang ; Yuanye Ma ; Vucetic, Branka
Author_Institution :
Sch. of Electr. & Inf. Eng., Univ. of Sydney, Sydney, NSW, Australia
Abstract :
In this paper, we consider simultaneous wireless information and power transfer (SWIPT) in relay interference channels, where multiple source-destination pairs communicate through their dedicated energy harvesting relays. Each relay needs to split its received signal from sources into two streams: one for information forwarding and the other for energy harvesting. We develop a distributed power splitting framework using game theory to derive a profile of power splitting ratios for all relays that can achieve a good network-wide performance. Specifically, non-cooperative games are respectively formulated for pure amplify-and-forward (AF) and decode-and-forward (DF) networks, in which each link is modeled as a strategic player who aims to maximize its own achievable rate. The existence and uniqueness for the Nash equilibriums (NEs) of the formulated games are analyzed and a distributed algorithm with provable convergence to achieve the NEs is also developed. Subsequently, the developed framework is extended to the more general network setting with mixed AF and DF relays. All the theoretical analyses are validated by extensive numerical results. Simulation results show that the proposed game-theoretical approach can achieve a near-optimal network-wide performance on average, especially for the scenarios with relatively low and moderate interference.
Keywords :
amplify and forward communication; decode and forward communication; energy harvesting; game theory; interference; relay networks (telecommunication); AF relays; DF relays; Nash equilibriums; SWIPT; amplify-and-forward networks; decode-and-forward networks; distributed power splitting framework; energy harvesting relays; game theory; information forwarding; multiple source-destination pairs; relay interference channels; simultaneous wireless information and power transfer; Energy harvesting; Games; Interference channels; Protocols; Relays; Signal to noise ratio; Nash equilibrium; RF energy harvesting; Simultaneous wireless information and power transfer (SWIPT); distributed power splitting; game theory; relay interference channel;
Journal_Title :
Wireless Communications, IEEE Transactions on
DOI :
10.1109/TWC.2014.2349892