Cognitive uplink interference management in 4G cellular femtocells

Author

Li, Yang-Yang ; Sousa, Elvino S.

Author_Institution

Dept. of Electr. & Comput. Eng., Univ. of Toronto, Toronto, ON, Canada

fYear

2010

Firstpage

1567

Lastpage

1571

Abstract

We study a cognitive channel reuse approach for autonomous femtocell deployment in an OFDMA-based cellular network. The objective is to manage the uplink interference from macrocell users to femtocell access points. Macrocell users are normally far away from the base station and may cause strong uplink interference to the close-by femtocells. By cognitive interference recognition, a femtocell access point autonomously reuse the proper channel modes for interference minimization. We propose an opportunistic channel scheduling scheme that determines optimal channel and power allocation to femtocell users. Simulation results show improved uplink performance in terms of the average channel outage probability in femtocells.

Keywords

4G mobile communication; OFDM modulation; channel allocation; cognitive radio; femtocellular radio; frequency allocation; frequency division multiple access; interference suppression; microcellular radio; probability; 4G cellular network; OFDMA; base station; channel scheduling scheme; cognitive channel reuse approach; cognitive interference recognition; femtocell access points; femtocell deployment; interference minimization; macrocell; outage probability; power allocation; Computer architecture; Femtocells; Interference; Macrocell networks; Microprocessors; Signal to noise ratio;

fLanguage

English

Publisher

ieee

Conference_Titel

Personal Indoor and Mobile Radio Communications (PIMRC), 2010 IEEE 21st International Symposium on

Conference_Location

Instanbul

Print_ISBN

978-1-4244-8017-3

Type

conf

DOI

10.1109/PIMRC.2010.5671951

Filename

5671951