DocumentCode :
2385705
Title :
Queue-aware power allocation for multi-way relay networks
Author :
Wang, Miao ; Wang, Fanggang ; Zhong, Zhangdui
Author_Institution :
State Key Lab. of Rail Traffic Control & Safety, Beijing Jiaotong Univ., Beijing, China
fYear :
2012
fDate :
10-15 June 2012
Firstpage :
5573
Lastpage :
5577
Abstract :
We consider a wireless relay network in which multiple single-antenna users communicate with each other through a multi-antenna relay. With our earlier proposed framework of zero-forcing relaying, the inter-user interferences are canceled. In this paper, we investigate power allocation schemes for both regenerative and non-regenerative relays to improve the throughput performance. Considering different traffic demand of each user, a queue-aware power allocation (QPA) scheme is proposed to stabilize the queue of each user by maximizing a “sum demand” metric. The demand metric of each user is proportional to both its channel throughput and its queue length. The fairness in the sense of transmission delay or packet loss ratio is thus achieved as queue length is associated with the two performances. The power allocation problem schemes use Lagrangian method and bisection search. With the QPA scheme, the system throughput performance is improved while keeping all queues relatively stable. The simulation results indicate that the QPA scheme strikes a balance among the fairness of all the users and improve the system throughput.
Keywords :
antenna arrays; array signal processing; carrier transmission on power lines; electromagnetic interference; queueing theory; telecommunication channels; Lagrangian method; QPA scheme; bisection search; channel throughput; interuser interferences; multiple single-antenna; multiway relay networks; non-regenerative relays; queue length; queue stabilization; queue-aware power allocation; regenerative relays; sum demand metric; system throughput; throughput performance; traffic demand; wireless relay network; zero-forcing relaying; Array signal processing; Delay; Educational institutions; Relays; Resource management; Throughput; Beamforming; fairness; multi-way relay; power allocation; queue-aware; zero-forcing;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Communications (ICC), 2012 IEEE International Conference on
Conference_Location :
Ottawa, ON
ISSN :
1550-3607
Print_ISBN :
978-1-4577-2052-9
Electronic_ISBN :
1550-3607
Type :
conf
DOI :
10.1109/ICC.2012.6364811
Filename :
6364811
Link To Document :
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