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INTERNATIONAL TELECOMMUNICATION UNION FOCUS GROUP ON IPTV TELECOMMUNICATION STANDARDIZATION SECTOR FG IPTV-C-0182 English only STUDY PERIOD 2005-2008 2nd FG IPTV meeting: Busan, 16-20 October 2006 WG(s): 1 CONTRIBUTION Source: Korea (Republic of) Title: Proposal to initiate IPTV functional architecture over NGN Abstract This contribution describes two reasons that we have to define IPTV architecture on the basis of functional entity and proposes to initiate IPTV functional architecture over NGN. Introduction Most of telecom operators regard IPTV as a means to complete their triple-play service bundles – the combination of voice, data, and video services. The integration of IPTV service into conversation service, thus, is one of the critical issues for operator to solve sooner or later. In addition, NGN functional architecture can comprise various service-specific components such as IMS, PIES, and multimedia multicast/broadcast services (e.g. IPTV). NGN functional architecture for IMS and PIES has completed but that for IPTV is under the development. Therefore, it is a very important task to define IPTV architecture and to keep the alignment between IMS and IPTV in NGN. This contribution describes two reasons to define IPTV architecture on the basis of functional entity and proposes to initiate IPTV functional architecture over NGN. Contact: Jeong Yun Kim ETRI, Rep. of Korea Jin Ho Hahm ETRI, Rep. of Korea Jun Kyun Choi ICU, Rep. of Korea Tel: Fax: Email +82 42 860 5311 +82 42 860 5039 [email protected] Attention: This is a document submitted to the work of ITU-T and is intended for use by the participants to the activities of ITU-T's Focus Group on IPTV, and their respective staff and collaborators in their ITU-related work. It is made publicly available for information purposes but shall not be redistributed without the prior written consent of ITU. Copyright on this document is owned by the author, unless otherwise mentioned. This document is not an ITU-T Recommendation, an ITU publication, or part thereof. -2FG IPTV-C-0182 Discussion This section shows two reasons to define IPTV functional architecture on the basis of functional entity and some considerations. (1) IPTV is one of the subsytems for NGN At last July meeting SG13 finally consented Recommendation Y.2012 “Functional Requirements and Architecture of the NGN”, which describes the functional entities residing in both service stratum and transport stratum of NGN. Especially, both IMS component and PSTN/ISDN Emulation service component belong to the service stratum of NGN for Release 1. SG13 is developing overall NGN framework architecture. When considering beyond NGN Release 1 scope, IPTV functional architecture could be regard as one of the subsystem for NGN. In addition FG IPTV is a child of SG13. Consequently, defining both the functional entities and related reference point for IPTV under NGN umbrella will be a very reasonable method. (2) IPTV is a means to complete triple-play services From NGN’s point of view, IPTV could be regarded as a means to complete its triple-play service bundles – the combination of voice, data, and video service. In addition, IMS functional architecture comprises some functional entities and related reference points. IPTV functional architecture should be also defined at functional entity level as like IMS done it. Therefore, the functional entities of IPTV can be effectively aligned with and easily integrated with those of IMS. It is the reasonable decision to define IPTV architecture on the basis of functional entity. Before starting to study on IPTV functional architecture, we have to examine some considerations; - Which functional entities of IMS can be reused for IPTV functional architecture without their extension? - Which functional entities of IMS are needed to be extended for reuse in IPTV functional architecture? - What functional entities must be newly defined only for the support of IPTV service? This contribution proposes to choose two phase method in defining IPTV functional architecture to reply to the above considerations. First phase is to define the functional entities required for the purpose of video delivery. In second phase, the new functional entities to integrate video service into conversational service will be defined. FG IPTV-C108 is an example to try to define IPTV functional architecture within the scope of first phase. Proposal This contribution proposes to define IPTV functional architecture on the basis of functional entity, and to start the work in two phases. -----------