scope:

The present document identifies approaches to incorporating UCI capabilities as defined in EG 202 067 [2] and EG 203 072 [3] into ETSI's TISPAN NGN. The present document provides a review and assessment as to what extent existing standards, specifications and guidelines support elements of a UCI implementation and how, if necessary, they should be adapted in order to more fully support complete UCI implementation. The analysis presented is not restricted to only those standards and specifications developed in TISPAN but also covers the work of other bodies (whose work is already being incorporated to the NGN):

• a review of the work done by Liberty Alliance in this area is provided in annex C;

• a review of the existing TISPAN NGN capabilities to provide a UCI presence service is provided in annex B; and

• a review of SIP capabilities in this area is provided in annex A.

An outline abstract model of UCI showing use-cases, architecture and information flows is given in clause 5 and an analysis of how existing NGN protocols and capabilities support them is given in clause 6. The abstract model shows how the UCI elements are carried and how they may be presented across the NGN.

The present document provides, in clause 11, a model showing how UCI exists in the context of other developing standards work at ETSI and how they fit to the existing NGN model.