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INTERNATIONAL TELECOMMUNICATION UNION IPTV-GSI – C 286 – E TELECOMMUNICATION STANDARDIZATION SECTOR June 2009 English only STUDY PERIOD 2009-2012 Original: English 12/13 Question(s): IPTV-GSI – CONTRIBUTION 286 Source: ETRI Title: Proposal for a new web service component in NGN architecture for multi-service capabilities 1. Introduction From service evolutional point of view, most of NGN services will be based on web technologies with user friendly and personalized solutions to support multi-service capabilities. Regarding this, the Q.12/13 has discussed Web service architecture over NGN at the last May meeting and agreed to adopt this topic as a living list item. In NGN release 1, two components were identified in the service stratum: the IP multimedia service component and the PSTN/ISDN emulation service component. Other NGN service components were remained for the future to address other services such as streaming services. After that, IPTV service component has newly added in the service stratum for IPTV services. Similar manner, web service component will be required for supporting Web, etc. Therefore, in this contribution, we propose a new Web service component for NGN-Web convergence to support multi-service capabilities using Web. 2. NGN service specific components in NGN architecture 2.1. Current NGN service specific components Contact: Gyu Myoung Lee KAIST Korea (Republic of) Tel: +82-42-866-6828 Fax: +82-42-866-6226 Email: [email protected] Contact: Noel Crespi Institut Telecom France Tel: +33 (0)1 60 76 46 23 Fax: +33 (0)1 60 76 45 78 Email: [email protected] Contact: Jun Kyun Choi KAIST Korea (Republic of) Tel: +82-42-866-6122 Fax: +82-42-866-6226 Email: [email protected] Contact: Won Ryu ETRI Korea (Republic of) Tel: +82-42-860-6290 Email: [email protected] Attention: This is not a publication made available to the public, but an internal ITU-T Document intended only for use by the Member States of ITU, by ITU-T Sector Members and Associates, and their respective staff and collaborators in their ITU related work. It shall not be made available to, and used by, any other persons or entities without the prior written consent of ITU-T. -2IPTV-GSI – C 286 – E This section introduces the concept of current NGN service specific components, derived from the generalized NGN functional architecture based on [ITU-T Y.2012] and [ITU-T Y.1910]. (see Figure 1) IP multimedia service component The IP multimedia service component supports mediated multimedia services. These services may include multimedia session services, such as voice or video telephony or PSTN/ISDN simulation, and some non-session services, such as subscribe/notify for presence information and the message method for message exchange. PSTN/ISDN emulation service component The PSTN/ISDN emulation service component enables the support of legacy terminals connected through a gateway to an IP network. All PSTN/ISDN services remain available and identical (i.e., with the same operating characteristics), such that end users are unaware that they are not connected to a TDM-based PSTN/ISDN. Not all service capabilities and interfaces have to be present to provide PSTN/ISDN emulation. IPTV service component Service control functions and content delivery functions can optionally be included in the IPTV service component of NGN. Thus, application functions, service control functions, and content delivery functions are included in the service stratum of the NGN architecture. IPTV service control functional block corresponds to NGN service control functions. However, NGN service control functions can optionally include other functionalities. 2.2. Web service component In order to support web-related services, this contribution proposes a new Web service component as shown in Figure 1. ITU-T\COM-T\COMSI\C\286E.DOC -3IPTV-GSI – C 286 – E Applications New Component for Web Service Stratum Application Support Functions Functions and Service Support Functions Application S. User Profile Functions Web Service Components Service Control Functions IPTV Service Component Legacy Terminals Legacy Terminals IP Multimedia Component IP Multimedia &PSTN/ISDN Simulation Service Component GW GW Network Access T.User User Network Attachment Control Functions Profile ProfileAttachment Functions (NACF) Functions Functions Customer Networks Access Network Access Transport Functions Functions NGN Terminals End-User Functions Edge Functions Resource and Admission Control Functions (RACF) Other Networks PSTN / ISDN Emulation Service Component Coretransport Transport Core Functions Functions Transport Stratum Figure 1.Web service component in NGN service specific components Web service component The Web service component enables web service and web based service. For Web service, this component supports Web technologies such as HTTP, SOAP(Simple Object Access Protocol), XML(Extensible Markup Language), and WSDL(Web Services Description Language), etc. Other service components can use the Web service component to support various applications using Web. 2.3. Relationship with NGN components Figure 2 describes relationship with each service component of NGN. The IP multimedia service (IMS based) component is specified further in [ITU-T Y.2021]. The PSTN/ISDN emulation service (IMS based and call server) component is specified further in [ITU-T Y.2031]. The IPTV service (IMS based, Non-IMS, and Non NGN) component is specified further in [ITU-T Y.1910]. The Web service (Web service, Web based) component will be specified further in a new Recommendation. In case of Web-based, interworking with other service components will be necessary. ITU-T\COM-T\COMSI\C\286E.DOC -4IPTV-GSI – C 286 – E Service components in NGN architecture Related Recommendations for each service component New Recommendation Web Service Component Web service Web based (interworking with other service components) Y.2041 IPTV Service Component IMS based Y.2031 Non-IMS PSTN/ISDN Emulation Service Component IMS based Non NGN Call server Y.2021 IP Multimedia Service Component IMS based Y.1910: IPTV functional architecture Y.2031: PSTN/ISDN emulation architecture Y.2021: IMS for next generation networks Figure 2. Service components and relationships in NGN architecture 3. Proposal We would like to discuss the proposed Web service component in NGN architecture and also request to include our proposal (the Section 2) in the Appendix of current living list (Web service architecture over NGN) of Q.12/13 for encouraging contributions and developing an initial draft recommendation on this work. ________________ ITU-T\COM-T\COMSI\C\286E.DOC