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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