Two-tier femtocell networks, in which a large number of femto base stations (BSs) are deployed within a region overlapping with a macrocell, can provide an economical means of increasing user capacity and coverage. Given that femto BSs may be deployed with no cell planning, cross-tier interference generated from a number of macrocells and femtocells can cause severe problems. In particular, a macro mobile station (MS) that transmits uplink data may generate severe interference with adjacent femtocells, which causes performance degradation. In order to solve these problems, two novel resource allocation schemes, optimization and heuristic, are proposed, which efficiently reduce uplink interference in two-tier femtocell networks. Simulation results at the system level verify that both proposed schemes can improve the average capacity of the femtocells, but the heuristic scheme outperforms the optimization scheme in terms of computational complexity.
|Journal||Mobile Information Systems|
|Publication status||Published - 2018|
Bibliographical noteFunding Information:
1is research was a part of the project titled Development of Distributed Underwater Monitoring and Control Networks, funded by the Ministry of Oceans and Fisheries, Korea. In part, this work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea Government (MSIT) (No. NRF-2018R1C1B5045013), and this work was supported by the research grant of Chungbuk National University in 2018.
© 2018 Sung-Yeop Pyun et al.
All Science Journal Classification (ASJC) codes
- Computer Science Applications
- Computer Networks and Communications