GGSN UMTS charging and billing HSS This work has been submitted to the IEEE for possible publication. Copyright may be transferred without notice, after which this version may no longer be accessible.
Introduction Many activities which in the past have required physical presence and direct interaction among participants can be performed in a distributed fashion with the help of advanced information technologies such as, CSCW [1,2] (Computer Supported Cooperative Work), interactive multimedia services and broadband communications. Technologies aiming at… (More)
The mobile radio systems beyond third generation (3G) will evolve in all-IP systems, integrating Internet and mobile systems advantages. BRAIN project is developing a system architecture which combines local coverage broadband radio access systems based in HIPERLAN/2 with several wider coverage mobile radio systems, enabling full coverage of seamless… (More)
Isabel is a P2P like multipoint group collaboration tool for the Internet, which implements an innovative service concept for synchronous collaborations based on a flexible and programmable floor control. This approach leads to a more natural and effective management of collaboration sessions. The flexible and programmable floor control incorporates the… (More)
Results of the conceptual work carried out during the BRAIN project concerning the BRAIN QoS Framework and the Brain ENd Terminal Architecture (BRENTA) is presented. This includes mechanisms to specify and manage QoS End-to-End including mobile end-systems and IP based wireless access networks in the transmission path. One of the key points is to manage QoS… (More)
This paper describes pilot experiences of distance learning using videoconference over the public Integrated Services Digital Network (ISDN). Graduate and postgraduate courses of the Technical University of Madrid (Telecommunication Engineers) form the educational scenario chosen for the experiences. Several phases were defined to carry out the experiments,… (More)
Mobile prosumer environments describe situations in which non-expert users have the possibility to create and provide their own services to others in a prosumer framework. This paper describes a systematic approach for leveraging current IoT scenarios, where two types of roles (developers and prosumers) interact in order to develop a framework that would… (More)