A novel frequency and power allocation algorithm in OFDMA based femtocell networks

Author

Ahrar, Mojtaba Azimi ; Ghorashi, Seyed Ali

Author_Institution

Dept. of Electr. Eng., Cognitive Telecommun. Res. Group, Shahid Beheshti Univ., Tehran, Iran

fYear

2014

fDate

20-22 May 2014

Firstpage

1448

Lastpage

1452

Abstract

A frequency and power allocation algorithm is introduced in order to reduce inter-cell interference in an OFDMA based femtocell network in order to increase system capacity. The frequency allocation part of the algorithm is based on graph coloring theory and then an iterative Water-Filling algorithm is used for power allocation. The frequency spectrum is divided into subchannels that are assigned to femtocells so that the same subchannel may not be assigned to the neighboring femtocells. Simulation results show that the proposed frequency and power allocation algorithm can increase the system capacity about 15% with respect to traditional resource allocation methods.

Keywords

OFDM modulation; femtocellular radio; frequency allocation; frequency division multiple access; graph colouring; iterative methods; radio spectrum management; radiofrequency interference; OFDMA based femtocell networks; frequency allocation algorithm; frequency spectrum; graph coloring theory; intercell interference reduction; iterative water-filling algorithm; power allocation algorithm; resource allocation methods; system capacity; Algorithm design and analysis; Femtocell networks; Interference; OFDM; Radio spectrum management; Resource management; Signal to noise ratio; Water-Filling; femtocell; graph coloing; inter-cell interference;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Engineering (ICEE), 2014 22nd Iranian Conference on

Conference_Location

Tehran

Type

conf

DOI

10.1109/IranianCEE.2014.6999761

Filename

6999761