Title :
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
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;
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
DOI :
10.1109/PIMRC.2010.5671951
