Performance Improvement of Outage Users at Cell Edges through Cognitive-Femtocell Deployment over Macrocell Network

Abstract

This research focuses on the problem of cell edge user coverage in the context of femtocell networks operating within the locality of macro cell border. The macro cell-edge users get assisted by the cognitive-femto base station (FBS) to receive a consistent quality of service (QoS) because of their long distance from the macro base station (MBS). Considering various environment factors such as wall structure, number of walls, distance between macro cell and users, interference effect (i.e., cotier and cross-tier), we compute not only the overall outage probability of single input single output (SISO) system and single input multiple output (SIMO) system users but also based on sub carrier and power allocation the performance of the two tier network is analysed with macro cell throughput as the performance metric. Finally, the effectiveness of the scheme is verified by extensive matlab simulation.