Research Article
Cognitive Aware Interference Mitigation Scheme for LTE Femtocells
@INPROCEEDINGS{10.1007/978-3-319-24540-9_50, author={Ismail AlQerm and Basem Shihada}, title={Cognitive Aware Interference Mitigation Scheme for LTE Femtocells}, proceedings={Cognitive Radio Oriented Wireless Networks. 10th International Conference, CROWNCOM 2015, Doha, Qatar, April 21--23, 2015, Revised Selected Papers}, proceedings_a={CROWNCOM}, year={2015}, month={10}, keywords={Cognitive radio Femtocells Macro users Radio channels Cross-tier interference Co-tier interference}, doi={10.1007/978-3-319-24540-9_50} }- Ismail AlQerm
Basem Shihada
Year: 2015
Cognitive Aware Interference Mitigation Scheme for LTE Femtocells
CROWNCOM
Springer
DOI: 10.1007/978-3-319-24540-9_50
Abstract
Femto-cells deployment in today’s cellular networks came into practice to fulfill the increasing demand for data services. However, interference to other femto and macro-cells users remains an unresolved challenge. In this paper, we propose an interference mitigation scheme to control the cross-tier interference caused by femto-cells to the macro users and the co-tier interference among femtocells. Cognitive radio spectrum sensing capability is utilized to determine the non-occupied channels or the ones that cause minimal interference to the macro users. An awareness based channel allocation scheme is developed with the assistance of the graph-coloring algorithm to assign channels to the femto-cells base stations with power optimization, minimal interference, maximum throughput, and maximum spectrum efficiency. In addition, the scheme exploits negotiation capability to match traffic load and QoS with the channel capacity, and to maintain efficient utilization of the available channels.