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WM-SIMA: Herramienta de simulación para el enlace descendente LTE-Advanced Delgado-Luque, Isabel-María Martín-Vega, Francisco-Javier Carreras, Alberto Gómez-Paredes, Gerardo Aguayo-Torres, María del Carmen Entrambasaguas-Muñoz, José Tomás Sistemas de comunicaciones móviles In this paper, we present a novel and efficient link level simulation framework for the donwlink (DL) of Long Term Evolution Advanced (LTE-A) cellular networks. The tool, called Wireless Mobile SIMulator Advanced (WM-SIMA), is available to be downloaded so that researchers can use it to evaluate the performance for different network configurations. In this work, the main characteristics of WM-SIMA are presented. As a case of use, the Average Spectral Efficiency (ASE) is obtained for the DL of a two-tier network, composed of Macro Access Points (MAPs) and Pico APs (PAPs). Simulation results confirms that there exist an optimal Cell Range Expansion (CRE) bias in the cell association that maximizes the ASE. Interestingly, it is confirmed that this optimal bias does not depend on the number of PAPs, while increasing the number of PAPs leads to a higher ASE for the same bias. 2017-09-12T09:22:19Z 2017-09-12T09:22:19Z 2017-09-12T09:22:19Z 2017-09-12 journal article http://hdl.handle.net/10630/14443 http://orcid.org/0000-0002-9715-7949 spa XXXII Simposium Nacional de la Unión Científica Internacional de Radio, URSI 2017 Cartagena 6 septiembre 2017 open access by-nc-nd