Arrangement for improving availability of services in a communication system

Arrangement for improving availability of services in a telecommunication system, said arrangement comprising:

• distributed hardware and software components which interact in order to provide services to one or more users through terminals connected to said telecommunication system through network access point(s), said distributed hardware and software components including a Generic Mobility System (GMS) processing and managing data necessary to support mobility for said terminal(s) and user(s);
• wherein the GMS comprises the following mobility support functions;
• terminal mobility functions keeping track of which network access point each terminal is connected to at any time, for allowing the terminals to change locations while still being capable of requesting outgoing services or receiving incoming ones;
• user mobility functions allowing the user(s) to utilize different terminals including means for user registration and informing the system of which terminal(s) the user(s) is/are utilizing;
• session mobility functions allowing a session or sessions, being used by the user(s), to follow the user(s) independently of the location of the user(s), the terminal(s) or the access point(s) utilized by the user(s), said session mobility functions including registration of the user(s), said session(s) and the terminal(s) the user(s) is using;
• mobility transparency support functions making all mobility support functions transparent to all applications of the system;
• mobility-related security functions providing protection against abuse or unauthorized use of both the terminal(s), the telecommunication system and the services, including access control thereto and identification and authentication of the user(s);
• mobility-unaware application support functions making ordinary applications and services not adjusted for mobility available for the user(s) at anytime from any of the terminals and access points;
• mobility-aware application support functions allowing mobility-aware application including registration and collection of mobility information to be implemented, and
• mobility-based application support functions keeping track of positions of the terminal(s) at any time.