Distributed Multi-Cell Power Allocation Algorithm for Energy Efficiency in OFDMA Relay Systems

Author

Xiao, Lin ; Cuthbert, Laurie ; Zhang, Tiankui

Author_Institution

Electron. Eng. & Comput. Sci., Queen Mary Univ. of London, London, UK

fYear

2009

fDate

14-18 June 2009

Firstpage

1

Lastpage

5

Abstract

The power allocation problem with co-channel interference is studied in multi-cell OFDMA cellular relay systems. Based on non-cooperative game theory and using a two-hop data rate balance, a distributed multi-cell power allocation (DMPA) algorithm is proposed, which reduces the transmission power cost and improves the system throughput. The non-cooperative power allocation game model is given in the first time subslot for base stations (BSs) and in the second time subslot for relay stations (RSs) respectively. Furthermore, the power is reduced by matching the data rate of the two-hop links for each RS. The simulation results of system throughput and transmission power of BS and RS are given with different numbers of users. Compared with equal power allocation on each subchannel, the system energy consumption is reduced and the throughput is improved.

Keywords

OFDM modulation; cellular radio; cochannel interference; frequency division multiple access; game theory; base station; cochannel interference; distributed multicell power allocation algorithm; energy efficiency; frequency division multiple access; game model; multicell OFDMA cellular relay system; orthogonal frequency division multiplexing; relay station; system energy consumption; system throughput; two-hop data rate balance; Computer science; Energy consumption; Energy efficiency; Game theory; Interchannel interference; Power engineering and energy; Power system modeling; Power system relaying; Throughput; Transmitters;

fLanguage

English

Publisher

ieee

Conference_Titel

Communications Workshops, 2009. ICC Workshops 2009. IEEE International Conference on

Conference_Location

Dresden

Print_ISBN

978-1-4244-3437-4

Type

conf

DOI

10.1109/ICCW.2009.5208015

Filename

5208015