Title :
Adaptive power allocation scheme for energy efficient OFDMA relay networks
Author :
Xia, Lin ; Cuthbert, Laurie
Author_Institution :
Dept. of Electron. Eng., Queen Mary, Univ. of London, London, UK
Abstract :
An adaptive power allocation algorithm called two-hop power allocation (THPA) is proposed to guarantee two-hop data rate balance in regenerative OFDM relay systems. The aim of this algorithm is power efficiency at the transmission node. The base station (BS) or relay station (RS) adjust power adaptively in terms of the difference between the first hop link data rate and the second hop link data rate of each RS. The transmission power on the link with the larger data rate will be reduced while the transmission power on the other link remaining the same. In this way, the data rate on the two hops of one RS will be matched and the total transmission power will be reduced. The simulation with different RS location is given and it is shown that the THPA algorithm can reduce the power of BS and RS efficiently while not affecting the system throughput and user fairness.
Keywords :
OFDM modulation; cellular radio; energy conservation; frequency division multiple access; radio links; OFDMA relay network; adaptive power allocation scheme; base station; energy efficiency; relay station; transmission power; two-hop power allocation; Base stations; Data engineering; Energy efficiency; OFDM; Power engineering and energy; Power system modeling; Power system relaying; Regeneration engineering; Relays; Throughput; OFDMA; data rate balance; power allocation; relay;
Conference_Titel :
Communication Systems, 2008. ICCS 2008. 11th IEEE Singapore International Conference on
Conference_Location :
Guangzhou
Print_ISBN :
978-1-4244-2423-8
Electronic_ISBN :
978-1-4244-2424-5
DOI :
10.1109/ICCS.2008.4737263
