Self-optimization of remote electrical tilt

The capacity and coverage area of a cell may vary due to changed environment, insertion or deletion of base stations, or malfunctioning base stations, and wrong parameter selection in the network planning phase. Suboptimal capacity and coverage area leads to the waste of network resources and the lower quality. Reacting on the changed situation manually is very expensive and time consuming. Therefore, 3GPP introduces Coverage and Capacity Optimization (CCO) use case for LTE and LTE-Advanced technologies. In this paper, we focus on the self-optimization of remote electrical tilt from the perspective of CCO. Simulation studies are performed for best-effort traffic, and resource fair scheduling by using LTE snap-shot simulator where propagation and uneven user distribution is modeled in three dimensions for a realistic macro-cellular network scenario.