DocumentCode :
3238319
Title :
Power savings from half-duplex relaying in downlink cellular systems
Author :
Raman, Chandrasekharan ; Foschini, Gerard J. ; Valenzuela, Reinaldo A. ; Yates, Roy D. ; Mandayam, Narayan B.
Author_Institution :
WIN-Lab., Rutgers Univ., North Brunswick, NJ, USA
fYear :
2009
fDate :
Sept. 30 2009-Oct. 2 2009
Firstpage :
748
Lastpage :
753
Abstract :
We evaluate the peak and average power savings due to relay deployments in cellular systems via a simulation study. The peak power savings translate to cost reduction in power amplifiers. The average power savings lead to savings in electricity bills. Half-duplex relays are placed one per sector in a 19-cell, 57-sector cellular network. In the baseline case, the base stations control their transmit powers to achieve a common rate among users. When relays are present in the system, optimal powers are found when the relays get the complete message to be relayed to the user. The codebooks at the relays are chosen such that the users obtain a rate corresponding to the sum of the received powers from the base station and the relay. We observe that when power control is employed, the peak power saving is 2.6 dB and the average total power in the system can be reduced by 3 dB.
Keywords :
cellular radio; channel capacity; multiuser detection; network coding; downlink cellular systems; half-duplex relaying; half-duplex relays; power savings; Base stations; Collaborative work; Costs; Decoding; Downlink; Interference; Land mobile radio cellular systems; Power control; Power system relaying; Relays;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Communication, Control, and Computing, 2009. Allerton 2009. 47th Annual Allerton Conference on
Conference_Location :
Monticello, IL
Print_ISBN :
978-1-4244-5870-7
Type :
conf
DOI :
10.1109/ALLERTON.2009.5394937
Filename :
5394937
Link To Document :
بازگشت