Delaunay Triangulation Based Green Base Station Operation for Self Organizing Network

In order to reduce the energy consumption in the cellular network, green self-organizing network (SON) techniques gain the attention from economical and environmental perspective. We study the base station (BS) turning-off operation that can run without knowing the global knowledge of dynamic traffic distribution in time and space. We propose a green SON framework based on an overlay network using Delaunay triangulation (DT). Specifically, we propose a threshold-based BS off algorithm for reliable and operator-friendly operation. The proposed algorithm can be readily implemented and standard compliant, the existing architecture such as X2 interface can be used with minimal modification. We perform an extensive simulations using a realistic urban BS topology, and the results confirm that the proposed algorithm can significantly reduce the energy consumption, e.g., more than 60%, and the energy-delay trade-off curve is almost close to the optimal one, which can be found by the exhaustive search only.