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Effectivity of wireless indoor communication using femtocell network is closely related to the accuracy of the femtocell access point (FAP) placement in each room. Good planning during the FAP deployment process related to the location and the number of FAP needed is the key to creating a more stable indoor communication in accordance with the area, number of users, and distance between FAP and user. Mainly, the methods used herein were Voronoi and gradient-based optimization methods. The aim was to get proportional coverage in term of true coverage, overlaps area, and blank spots area. The simulation was set up with 20 – 60 FAP units. The result shows that steepest descent and conjugate gradient as complement to proposed methods has successfully outperformed presented existing methods. Their percentage average values of true coverage are 59.3% and 68.2%, overlaps area are 5.5% and 10.6%, and blank spots area are 0.0039% and 0.0007%, respectively.

Coverage Planning for Co-tier Femtocell Networks Using Voronoi Diagram and Gradient-based Optimization Method