Optimised Network Architectures for Multimedia Services

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Summary : OPTIMUM is a user-friendly, graphically oriented tool for techno-economic assessment including risk of telecommunication networks and services. The present version is designed as a very open tool, giving maximum flexibility towards the user. The tool is designed for strategic studies which combine low-level detailed network description with relatively high level parameters such as market level and density of customers. Compared to earlier versions of the OPTIMUM tool (developed within the context of the RACE 2087 project TITAN), this version aims at the study of architectures spanning the whole telecom network (not only the access network) and at advanced telecommunication services like networked mutimedia. Earlier versions of the TITAN tool were using time consuming macros for model calculation. The time needed to perform one model calculation cycle could be as long as 60 seconds. For risk assessment, where thousends of calculation cycles are needed, this was not usable. The present version the OPTIMUM tool handles model calculations in a completely different and more efficient way. Data updates from the tool database are only done when necessary, repetition of identical calculations in successive calculation cycles is prohibited by storing intermediate results, extensive use is been made of array-formulas for faster formula-evaluation and many functions are compiled and object code is stored in library modules. What You Will Need: To run OPTIMUM Version 2.x, you will need the following: A personal computer with Pentium microprocessor and at least 16 MB RAM. Less RAM capacity could slow down operation of the program. A hard disk drive with a recommended capacity of at least 1.2 GB (OPTIMUM will take ?10MB) A 3.5" 1.44 MB high-density disk drive (optional if computer is connected to the Internet) Microsoft Windows 95 or Windows NT 3.51 operating system or later. Microsoft Excel Version 7.0.

The main objective of OPTIMUM was to establish guidelines for the introduction of advanced communication networks in a competitive environment, based on the evaluation of different multimedia network case studies derived from field trials and projects within the ACTS programme and relevant external projects. They emphasize the impact of key cost elements and the risk related to the introduction of new services and advanced networks. They cannot include definite recommendations for specific players but represent a broader consensus view of many players and their interests. However, the evaluation process and the results of the common studies give improved understanding of the techno- economic issues of advanced communication. The value of OPTIMUM is firstly the common methodology and tool that the partners and other ACTS projects use in their specific cases. Secondly, OPTIMUM includes co-operative studies that provide objective guidelines for creating consensus within ACTS. As a horizontal project, OPTIMUM carried out detailed studies of different multimedia services and network solutions in different domains, therefore it has been linked to more than one domain. OPTIMUM partners participate in the internal cooperation process by contributing to the BA chain and the SII chain. OPTIMUM has contributed to the external cooperation process by publishing papers for conferences and journals and has organized workshops on tech-economic aspects of multimedia services and network projects. In addition OPTIMUM has cooperated with EURESCOM P614 and contributed to standardization bodies. The results of OPTIMUM have been published in more than 50 contributions to journals and conferences. They are used by tele-operators and equipment providers in their strategic work. The tool developed within OPTIMUM is widely used for the evaluation of business cases. Project URL: http://www.fou.telenor.no/optimum

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