De-Centralized Dynamic ICIC Using X2 Interfaces for Downlink LTE Systems

A novel de-centralized dynamic inter-cell interference coordination (ICIC) method, which can change cell-edge bands dynamically by using an X2 interface and can be applied to current downlink long-term evolution (LTE) systems, is proposed. This dynamic ICIC method can autonomously optimize fractional frequency reuse (FFR) parameters and thus increase throughput. In addition, it works well even in the presence of control delays in time-variable environments. Static and dynamic system-level simulation (SLS) demonstrated that the throughput achieved by the proposed method is superior to that of conventional FFR methods.