Title :
A power optimization algorithm for femtocells to suppress the uplink interference in OFDMA system
Author :
Shijun Min ; Mugen Peng ; Jingjie Yu ; Yao Wei
Author_Institution :
Wireless Signal Process & Network Lab., Beijing Univ. of Posts & Telecommun., Beijing, China
Abstract :
Femtocell has been considered by the wireless industry as an effective solution not only to improve indoor coverage, but also to offload traffic from the overburdened macrocell networks. In hybrid macro/femto networks, macrocell may have to share the same frequency resource with femtocells, considering the spectrum availability and network infrastructure cost. Sharing the same spectrum may lead severe interference to macrocell users especially when femtocells are densely deployed. In this paper, a decentralized scheme is proposed for the protection of macrocell users´ uplink by reducing femtocell users´ transmission power. Simulation results confirm that the proposed method is feasible and effective.
Keywords :
OFDM modulation; femtocellular radio; frequency division multiple access; indoor radio; interference suppression; radio links; radiofrequency interference; telecommunication traffic; OFDMA system; decentralized scheme; femtocells; frequency resource sharing; hybrid macro-femto network; indoor coverage; macrocell network; network infrastructure cost; offload traffic; power optimization algorithm; spectrum availability; transmission power reduction; uplink interference suppression; uplink protection; wireless industry; OFDMA; femtocell; power adaption; uplink interference;
Conference_Titel :
Communication Technology and Application (ICCTA 2011), IET International Conference on
Conference_Location :
Beijing
DOI :
10.1049/cp.2011.0679