Title :
A Novel Relay Selection Scheme with Simplified Power Allocation for Wireless Relay Networks
Author :
Wu, Hua ; Wang, Yafeng ; Xiong, Cong ; Yang, Dacheng
Author_Institution :
Wireless Theor. & Technol. Lab., Beijing Univ. of Posts & Telecommun., Beijing, China
Abstract :
In order to avoid the resource inefficiency of all-participated cooperation in wireless amplify-and-forward relay networks, a novel relay selection scheme based on the channel gain of the source-relay and relay-destination links is proposed. A condition is introduced to maximize the upper bound of the overall received signal-to-noise ratio (SNR). The relay nodes which have bad channel conditions are excluded in turn from the cooperation so that their released resources can be reallocated to other nodes. This paper adopts a simplified power allocation scheme that assumes each selected relay has equal power. The total power is optimally assigned between the source and the relay set. Simulation results show that the proposed scheme can achieve similar BER performance with the scheme which employs all relays and optimal power allocation, but only applies a subset of available relays.
Keywords :
amplification; radio networks; radio repeaters; bad channel condition; channel gain; relay selection; simplified power allocation; wireless amplify-and-forward relay network; wireless relay networks; Bit error rate; Electronic mail; Fading; Power system modeling; Power system relaying; Relays; Resource management; Sensor systems; Signal to noise ratio; Upper bound;
Conference_Titel :
Global Telecommunications Conference, 2009. GLOBECOM 2009. IEEE
Conference_Location :
Honolulu, HI
Print_ISBN :
978-1-4244-4148-8
DOI :
10.1109/GLOCOM.2009.5425301
