Institute of Electrical & Electronic Engineers
As a mainstream technology in the 4G TDD (Time Division Duplex) systems, TD-LTE (Long Term Evolution) introduces heterogeneous network topology, utilizing a diverse set of base stations, to improve spectral efficiency per unit area. In heterogeneous network deployment comprised of macrocell and picocell, Inter-Cell Interference Coordination (ICIC) is very important to significantly improve the system and cell-edge throughput. Moreover, variety of complex situation of Inter-Cell Interference (ICI) occurs in heterogeneous TDD LTE cellular networks due to different DownLink/UpLink (DL/UL) sub-frame configurations of macrocell and picocell. Therefore, this paper proposes an efficient ICIC scheme consisting of four sub-schemes according to relevant interference scenarios based on different sub-frame configurations.