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  1. 1. INTERNATIONAL TELECOMMUNICATION UNION FOCUS GROUP ON IPTV TELECOMMUNICATION STANDARDIZATION SECTOR FG IPTV-MR-0004 STUDY PERIOD 2005-2008 Original: English Question(s): WG4 1st FG IPTV meeting: Geneva, 10-14 July 2006 MEETING REPORT Source: WG 4 Leader Title: Meeting Report of IPTV Network Control Aspects Working Group 4 met in Geneva, Switzerland from 10 to 14 July 2006. Mr. Dae-Gun Kim (KT, Korea) chaired the meeting. 1 Goals of the meeting The group met to progress the work on the following subjects. • Define the mandate • Identify Terms of References • Review of Input Documents addressed to the meeting • Identify detailed work plan through the contributions 2 Summary of the results Key results of this group are summarized as following. Summary of key results are as follows: • Change the title of WG: Given title of the group “Network and control aspects” raised many of confusion to the participants, especially big confusion with WG1 mandates on architecture aspects. After taking consideration with other WGs and management team, the meeting agreed to focus on the control aspects of IPTV networks, accordingly changing title of the group should be “IPTV Network control aspects”. • Set up of Terms of Reference: One of key objective of this meeting is defined clear terms of reference of the group. ITU-T TSB Circular letter 85 is used as a framework for identifying terms of reference. One contribution is addressed on this also. Based on these inputs, meeting agreed terms of reference as shown in section 3.1. Contact: Dae-Gun Kim Tel: +82-31-727-5580 KT Fax: +82-31-727-5569 Korea Email dkim@kt.co.kr Attention: This document is an internal ITU-T Document intended only for use by the Member States of the 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 the ITU-T. All rights reserved. No part of this publication may be reproduced, by any means whatsoever, without the prior written permission of the source/author of this document.
  2. 2. -2- FG IPTV-MR-0004 • Future work plan: The outstanding issues on the IPTV network control aspects are contained at the living list (see FG IPTV-OD-0011). The alignments with general network architecture and its more detailed network control functions based on issues identified in living lists are needed to study in more details at the next meeting. 3 Detailed results 3.1 Term of References (ToR) Meeting discussed Term of Reference for this group based on Circular letter 85 which contained proposed ToR from TSB Directors’ consultation meeting at April 2006. One input document (FG IPTV-ID-0030) was submitted at this meeting. Meeting agreed significantly simplified it more crisp and clean mandate declaration for the group. Following issues are identified and agreed as ToR. • Naming, addressing and identification aspects: The Source or Distributor for IP TV could be identified by using IPv4/IPv6 address, URL name, E.164 number, etc. • Control and signaling mechanisms Control and signaling mechanisms for IPTV are identified in transport and service stratum. The key features of transport stratum could have many functions such as, multicast, unicast and distribution control function, admission and attachment control function, resource control function, mobility control functions, etc. And the key features of service stratum could have session and service control function. Multicasting aspects could be identified at home network, access network and core network. • Content distribution aspects This working group will review, analyze, recommend and if necessary define network protocols and mechanisms to support non-real time and real-time delivery of content and information in support of IPTV applications. This includes defining requirements and recommendations for the following areas: − Services such as VOD & EPG content delivery, System Information, Ad-Insertion (e.g. SCTE 35) − Content Transport leveraging system layers such as MPEG-2 Transport Streams and/or IETF RTP − Signaling protocols − Support of IPTV capabilities such as QoS/QoE, Content Protection, Closed Captioning • Home, Access and Core network issues Addressing functions and signaling that may be required for IPTV that depends on home, access and core network technologies being used. • Other Related issues - Various access and core transport scenarios for multicasting
  3. 3. -3- FG IPTV-MR-0004 - Interface protocols of UNI, NNI, and SNI where identified by architecture - Multicast VPN including multicast group management - Interworking aspects of Multicasting under heterogeneous environments - Control signaling for QoS/QoE 3.2 Network architecture and requirement aspects of IPTV • FG IPTV-ID-49: It proposes various access network technologies in IPTV. It looked to expand the scope of this working group to include defining both access network independent and access network specific requirements for IPTV. It was accepted in general. Several sections (6.2, 6.3, 8 and 9) in this contribution are retained on Living List for further study. • FG IPTV-ID-59: It proposes CDN architecture based IPTV media delivery system. It is a little hard to evaluate specific proposals for this area at this time. Therefore, this proposal should be submitted to WG1R (Requirements) first. • FG IPTV-ID-87: It proposes RTP/UDP/MPEG2 TS as a means of transmission for IPTV Streams. This contribution is retained on Living List for further study. 3.3 Control aspects of IPTV Networks • FG IPTV-ID-28: It proposes Interactive control Requirements for IPTV Service in order to define a content distribution and transmission framework in view of network and service including interactive control requirements using multicasting with unicasting transmission. This issue is retained on Living List for further study • FG IPTV-ID-83: It proposes prospective study items for NGN signalling for broadband services. Meeting agreed to retain on living list the contents of 3.3 on “Harmonization between telecommunication signalling and broadcast signalling” for further discussion. Contributor kindly requested to submit input documents at the next meeting identifying more details. 3.4 Identification aspects of IPTV • FG IPTV-ID-93: It proposes the IPTV unified subscriber’s identification. The SIP URL format as the IPTV unified subscriber’s identification can be considered in the interoperability between IPTV and other service network such as NGN and 3G. This contribution is retained on Living List for further study 3.5 QoS aspects of IPTV • FG IPTV-ID-13: It proposes the user requirements for perceptual video quality monitoring of IPTV. This contribution will be presented and addressed in both WG2 (QoS) as well as WG4 (Network). It leverages work being done in SG9 and requires a "side channel" for passing video quality delivery information back to the network and source. While the lead WG should
  4. 4. -4- FG IPTV-MR-0004 be WG2 (QoS) we expect any signalling or transport requirements for video quality monitoring will be presented back to this WG4 (Networking & Signalling) working group. 3.6 Coordination with other groups • FG IPTV-ID-11: It proposes the discussion issues about Y.ngn-mcast (NGN Multicast Service Capabilities with MPLS-based QoS Support). While the use of MPLS-based QoS is important for IPTV, the proposal in this contribution was not accepted since it was ruled that the ownership of this effort belongs in our parent SG13. 4 Joint meeting with WGs Meeting recognized joint meetings with other WGs at the next meeting, especially with WG1 and WG2 to clear the boundaries and avoid any further confusion. It is requested to assign joint sessions with those groups from the next meeting based on the situation of input documents. 5 Outgoing liaisons No liaison statements are issued at this meeting. 6 Output documents Document number Title FGIPTV-OD-0010 Working Document on “Requirements of IPTV Network control aspects” FGIPTV-OD-0011 Living List on IPTV Network Control Aspects 7 Plan for next meeting activities • Further development of the outstanding issues on the IPTV network control aspects which are contained at the living list. • To progress of the alignments between general network architecture and more detailed network control functions to produce the relevant mapping. • To progress the arrangement of IPTV network control model in comparisons with the NGN network model. 8 Acknowledgements WG 4 leader thanks all participants for their work and dedication during the course of this meeting. Special thanks to Mr. Greg Thompson (Cisco, USA) on his great help to develop ToR and other drafts.
  5. 5. -5- FG IPTV-MR-0004
  6. 6. -6- FG IPTV-MR-0004 Annex 1 Input Documents addressed to this meeting Doc. No. Titles Sources WGs FG IPTV-ID-5 SG 17 interest in IPTV Focus Group SG17 All FG IPTV-ID-9 LS on IPTV Focus Group SG 16 All Discussion issues about Y.ngn-mcast (NGN Architecture, FG IPTV-ID-11 Multicast Service Capabilities with MPLS-based Korea QoS Support) Network User requirements for perceptual video quality QoS, FG IPTV-ID-13 Korea monitoring of IPTV Network FG IPTV-ID-17 Technical issues on IP TV standardization Korea All Architecture, FG IPTV-ID-28 Interactive control Requirements for IPTV Service KT (Korea) Network Huawei FG IPTV-ID-35 Study of bearer network for the IPTV Network Technologies MII, Alcatel Requirement, Proposed requirements for IP access network in FG IPTV-ID-49 Shanghai IPTV Network Bell CATR of Architecture, FG IPTV-ID-52 Proposal studying NGN-based IPTV MII, Huawei Network Functional Requirements and Architecture of the CATR of Architecture, FG IPTV-ID-53 IMS-based IPTV MII, Huawei Network Functional Requirements and Architecture of the CATR of Architecture, FG IPTV-ID-54 non-IMS based IPTV MII, Huawei Network Architecture and Requirement of IPTV Network ZTE FG IPTV-ID-58 Network Management Corporation Proposal about CDN architecture based IPTV ZTE Content FG IPTV-ID-59 media delivery system Corporation distribution ZTE FG IPTV-ID-61 IPTV Security Reference Model and Requirement Security Corporation Key topics of IPTV security and content protection ZTE Security FG IPTV-ID-63 aspects Corporation FG IPTV-ID-64 Proposal about VCDN ZTE Content
  7. 7. -7- FG IPTV-MR-0004 Corporation distribution Architecture Requirement for Distributed IPTV Content FG IPTV-ID-74 UTStarcom Content Delivery System distribution FG IPTV-ID-76 Multicast Requirements for IPTV Service ETRI Multicast Proposal on Feature Interactions in Overlay FG IPTV-ID-77 ETRI Multicast Networks for IPTV Services NTT Discussion on prospective study items for NGN FG IPTV-ID-83 Comware Network signalling for broadband services Corporation Cisco RTP/UDP/MPEG2 TS as a means of transmission FG IPTV-ID-87 Systems, Network for IPTV Streams U.S.A China FG IPTV-ID-93 Proposal on IPTV unified subscriber’s identification Identification Telecom ___________________