DocumentCode :
3351477
Title :
A New Decentralized Power Allocation Strategy in Single-Hop Wireless Networks
Author :
Abouei, Jamshid ; Ebrahimi, Masoud ; Khandani, Amir K.
Author_Institution :
Waterloo Univ., Waterloo
fYear :
2007
fDate :
14-16 March 2007
Firstpage :
288
Lastpage :
293
Abstract :
In this paper, a simple decentralized power allocation strategy is proposed, which relies on the local information in a single-hop wireless network with n links. The main goal of the strategy is to improve the average sum-rate. We first define a new utility-based framework, in which each user takes into account the negative impact of its power increment on the other users performance. For large n and by knowing only the direct channel gain hii, the optimum strategy for user i is to transmit with full power or remain silent. The transmission policy is to compare hii with a prespecified threshold taun that is a function of n. Under a Rayleigh fading channel condition, it is demonstrated that among n pairs of nodes, the average number of active links is of order log n. Also, the average sum-rate scales as Theta(log n). The performance of the proposed strategy is compared with that of the centralized power allocation scheme and the non-cooperative power control games through simulation and the analytical arguments. The proposed on-off power allocation scheme has the advantage of not requiring a central controller. The proposed strategy relies on a one shot game with a simple structure, rather than the iterative mechanism used in the pricing algorithm. These properties make our scheme more practical in time-varying networks.
Keywords :
Rayleigh channels; decentralised control; power control; radio networks; telecommunication control; wireless channels; Rayleigh fading channel; active links; average sum-rate; central controller; decentralized power allocation strategy; direct channel gain; noncooperative power control games; on-off power allocation scheme; single-hop wireless networks; time-varying networks; transmission policy; Centralized control; Computer networks; Fading; Game theory; Interference; Iterative algorithms; Power control; Pricing; Spread spectrum communication; Wireless networks;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Information Sciences and Systems, 2007. CISS '07. 41st Annual Conference on
Conference_Location :
Baltimore, MD
Print_ISBN :
1-4244-1063-3
Electronic_ISBN :
1-4244-1037-1
Type :
conf
DOI :
10.1109/CISS.2007.4298315
Filename :
4298315
Link To Document :
بازگشت