(Continuation of Questions 4/16, 24/16, 25/16 and 29/16) Motivation
ITU-T Study Group 16 has focused on the H.300-, H.248- and T.120-series
standardization of real-time audiovisual conversational system platforms over
various types of network. The network infrastructure to support these multimedia
system platforms is converging to the IP-based one, which has been developed to
provide rich Internet services such as e-mail, hypertext multimedia data
retrieval, multimedia file transfer, multimedia streaming, presence, and instant
messaging. We have a good opportunity of utilizing these Internet services and
other new service features in conjunction with audio, video and data
capabilities of the multimedia system platforms standardized by SG 16. This
Question addresses how to provide advanced functions on top of the SG 16 defined
platforms for such multimedia services as videophone, videoconferencing, data
conferencing, telepresence, distance learning, e-health, interactive multimedia
information distribution, real-time multimedia collaboration in the NGN
environments. Aspects to be addressed or built upon include multimedia directory
services, quality of service and quality of experience, multimedia security, and
multimedia mobility. These aspects should be studied together in an integrated
way for next generation multimedia systems.
Study items
Study items to be considered include, but are not limited to:
- Architecture and protocols to integrate advanced service features such as
directory services, QoS, security and mobility with the SG 16 defined multimedia
system platforms
- Convergence of telecommunication and broadcasting services
- QoS mechanisms for multimedia systems and coders, including preferred QoS
signalling methods, end-to-end application level methods to provide better QoS
in lossy networks, common API or interfaces to network-based QoS mechanisms,
advanced methods for optimizing end-to-end latency and various QoS parameters,
and other aspects of end-to-end performance as perceived by the user
- Service level QoS classification of multimedia applications and services and
application service level agreement (SLA) definitions
- Descriptions of network QoS capabilities in terms of network QoS classes
and/or network SLA definitions
- Mapping between multimedia application QoS requirements and network QoS
capabilities
- Performance monitoring and measurement functions for multimedia applications
- Understand the principles, scenarios and security architectures of federated
trust domains and how such concepts of trust federations could best be
applicable to multimedia applications over NGN and other packet-based networks
- Identify the common and specific security requirements of next generation
multimedia applications and services such as video conferencing, collaboration
- Address security multimedia environments with mobility constraints; further
develop H.530 in distributed secured, multimedia networks; clarify security
aspects of “multimedia over wireless”
- Encryption of call signalling and media flows within H-series systems and
related applications
- Robust and reliable key management; e.g., acknowledged key update
- Further develop user, terminal and service mobility for H.323 and H.324, as
needed
- Ensure interworking with NGN to support multimedia mobility across networks of
different types
- Ensure that a possible future advanced multimedia system (AMS) terminal in its
initial version supports mobility
- Study the requirements for metadata in descriptions of user profile, terminal
capability, access network characteristics and service profile that relate to
service mobility
- Considerations on how to help measure and mitigate climate change
Tasks
Tasks include, but are not limited to:
- Definition of new services and their technical requirements capture
- Use of directory services, presence, etc. in H.300-series systems
- Enhanced QoS mechanisms for H.300-series and AMS
- QoS signalling in application service provider equipment and possible future
terminals
- Input to terms of reference for audio and video coders that maximize QoS in
lossy networks
- Input to IETF, 3GPP, SG 11, SG 12 and SG 13 on multimedia QoS needs
- Security requirements study with scenarios and architecture(s) for multimedia
applications and services benefiting from concepts of trust federations
- Specification of handover procedures where active sessions can be maintained
during location changes and terminal changes
- Specification of interworking with NGN networks to support generalised
mobility handling
- Enhancement and maintenance of H.350 sub-series, H.360, H.361, H.510 and H.530
An up-to-date status of work under this Question is found in the SG 16 work
programme (http://itu.int/ITU-T/workprog/wp_search.aspx?isn_sg=554).
Relationships
Recommendations:
- H.225.0, H.245, H.248, H.310, H.320, H.321, H.322, H.323, H.324, H.460.x
- G.1000, G.1010, Y.1540, Y.1541
- F.700-series, X.509, X.800-series
- Q.1707
Questions:
- • 1, 2, 3, 6, 7, 10, 12, 14, 21, 22/16
Study Groups:
- SG 2 on management security
- SG 9 on multimedia security for IPCablecom, CableHome systems and on home
networking security
- SG 11 for QoS Signalling
- SG 12 on performance
- SG 13 on NGN and on mobility (including security aspects of mobile
communications and lawful intercept)
- SG 17 on security, web services, languages and directories
Other Bodies:
- 3GPP for IMS multimedia security, mobility
- ATIS for T1M1sec management plane security, T1S1sec signalling security
including SS7 security
- ETSI TISPAN (QoS, security), TC SEC (SAGE)
- IEEE for 802.x WLAN & Link Layer security, P1363 PKI
- IETF for Internet supported services, QoS, security, IP mobility
- IMTC for interoperability
- IP/MPLS Forum for QoS, security
- ISO/IEC JTC1/SC27 for digital signature, key management, non-repudiation, etc
- ISO/IEC JTC1/SC29 for content and copy protection, watermarking, IPMP, secure
JPEG2000, etc
- Liberty Alliance Project for ID-FF Identity Federations, Identity Management, SSO, network wide authentication
- MSF for NGN security
- NIST for AES and other crypto algorithms, FIPS security documents, security
guidelines, etc
- OASIS for Web services security, SAML, XTASS, XACML
- W3C for XML signature, XML encryption, XACL
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