tailieunhanh - Báo cáo hóa học: "Research Article Novel Heuristics for Cell Radius Determination in WCDMA Systems and Their Application to Strategic Planning Studies"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article Novel Heuristics for Cell Radius Determination in WCDMA Systems and Their Application to Strategic Planning Studies | Hindawi Publishing Corporation EURASIP Journal on Wireless Communications and Networking Volume 2009 Article ID314814 14 pages doi 2009 314814 Research Article Novel Heuristics for Cell Radius Determination in WCDMA Systems and Their Application to Strategic Planning Studies A. Portilla-Figueras 1 S. Salcedo-Sanz 1 Klaus D. Hackbarth 2 F. Lopez-Ferreras 1 and G. Esteve-Asensio3 1 Departamento de Teoria de la Senal y Comunicaciones Escuela Politecnica Superior Universidad de Alcala Alcala de Henares 28871 Madrid Spain 2 Departamento delngenieria de Comunicaciones Universidad de Cantabria 39005 Santander Spain 3Departamento de Investigaciin y Desarrollo Grupo Vodafone 18004 Granada Spain Correspondence should be addressed to S. Salcedo-Sanz Received 24 March 2009 Accepted 20 August 2009 Recommended by Mohamed Hossam Ahmed We propose and compare three novel heuristics for the calculation of the optimal cell radius in mobile networks based on Wideband Code Division Multiple Access WCDMA technology. The proposed heuristics solve the problem of the load assignment and cellular radius calculation. We have tested our approaches with experiments in multiservices scenarios showing that the proposed heuristics maximize the cell radius providing the optimum load factor assignment. The main application of these algorithms is strategic planning studies where an estimation of the number of Nodes B of the mobile operator at a national level is required for economic analysis. In this case due to the large number of different scenarios considered cities towns and open areas other methods than simulation need to be considered. As far as we know there is no other similar method in the literature and therefore these heuristics may represent a novelty in strategic network planning studies. The proposed heuristics are implemented in a strategic planning software tool and an example of their application for a case in Spain is presented. The proposed .