VHE, Open Service Architecture (OSA)
This ETSI Technical Specification (TS) describes the Open Service Architecture for the Universal Mobile Telecommunications System (UMTS).
The goal of standardisation in UMTS with respect to Virtual Home Environment (VHE) services is to provide a framework within which services can be created based on standardised service features. The Open Service Architecture described in thes document provides this framework for implementing services based on service features, which in turn are based on service capabilities. As an advanced option it is possible to implement services directly based on service capabilities.