Title :
Distributed Relay Selection for Two-Way Relaying Networks Based on Power Conservation
Author :
Jie Yang ; Xue-Hong Cao
Author_Institution :
Dept. of Commun. & Inf. Eng., Nanjing Univ. of Posts & Telecommun. Line, Nanjing, China
Abstract :
In order to improve the power efficiency and extend the lifetime of the two-way amplify-and-forward (AF) relaying system, this paper proposes a distributed relay selection scheme based on relay power conservation. The closed-form solution of the the optimal power allocation based on total power minimization under the signal-to-noise ratio (SNR) constraints is derived, and the relay which requires the minimum transmit power among all relays is selected to assist two-way transmissions. The scheme can be performed in a distributed manner which only requires user-relay channel state information. Simulation results demonstrate that the proposed scheme can significantly decrease the relay power consumption.
Keywords :
amplify and forward communication; relay networks (telecommunication); telecommunication power management; SNR; amplify-and-forward relaying system; channel state information; distributed relay selection scheme; power allocation; relay power conservation; signal-to-noise ratio; two-way relaying networks; Minimization; Power demand; Quality of service; Relays; Resource management; Signal to noise ratio; Wireless communication; amplify-and-forward; power consumption; relay selection; two-way;
Conference_Titel :
Wireless Communication and Sensor Network (WCSN), 2014 International Conference on
Print_ISBN :
978-1-4799-7090-2
DOI :
10.1109/WCSN.2014.60
