TSG-SA/WG5 (Telecom Management) meeting #4	Tdoc S5-99084
Cambridge, UK, 2nd-4th June 1999

Source:	T-Mobil

Title:	Proposed text for "Architectural constraints" clause in 3G TS 32.102

7.2		Architectural constraints

Large software systems, such as a network management system, is a capital investment operators cannot afford to scrap every time its requirements change. Network operators are seeking cost-effective solutions to their short term needs. All these reality related issues are vital constraints that must be addressed in the definition of the architecture. 

The standardisation of UMTS will bring new and different services that will add new demands on network management. Every UMTS organisation will include different functionality depending on the role played and the equipment used by that UMTS entity. Regulation may force some of the roles that must be taken.  The need to link systems across corporate boundaries will be a consequence of this. 

The rapid evolution of new services and technologies will also put requirements on the UMTS physical management architecture to accommodate market and technology trends. To future-proof investments and continuously be able to take advantage of new technologies are important constraints to the physical architecture.

A UMTS TMN must also adopt an architecture that will achieve scalability and extensibility of systems and networks so the TMN can grow as the services expands over time. To start with a small TMN and easily be able to expand the TMN after new requirements will be important issues for most UMTS operators.

The telecom management network will be just one part of the overall IT-business of a company. Security, system management and development strategies can be the target for company policies. System architectures and technology choices, as well as the availability of off-the-shelf commercial systems and software components that fulfil the requirements established in this specification, may be critical to an operator’s implementation of the specified UMTS management architecture.