International Telecommunication Union
ITU-T Study Group 7
Herbert V. Bertine
Lucent Technologies
ITU-T and ITU-D Workshop
Bangalore (India), 30-31 August 2001
ITU-T Study Group 7
Data Networks and
Open System Communications
Responsible for studies relating to
data communication networks, and
for studies relating to the application
of open system communications
including networking, directory and
security
o Lead Study Group on:
o
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31.05.2016
Frame relay
Communication system security
ITU-T and ITU-D Workshop - Bangalore (India), 30-31 August 2001
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Study Group 7
o Responsible for 278 ITU-T
Recommendations - most of the Xseries plus a few in E, F, and Q series
• Several on the ITU “top 20” list X.25, X.509, ASN.1, …
o Study Group structure:
• WP1 Data Networks
• WP2 Open Systems Technology
• WP3 E-commerce/E-business
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ITU-T and ITU-D Workshop - Bangalore (India), 30-31 August 2001
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Relations
ISO/IEC
JTC 1
IETF
IEEE
FRAME
RELAY
FORUM
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STUDY
GROUP
7
OTHER
FORUMS
UN/ECE
OTHER
STUDY
GROUPS
ITU-T and ITU-D Workshop - Bangalore (India), 30-31 August 2001
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Public Data Networks
o Dedicated Data Networks
• Digital Data Networks – leased
circuits and circuit switched
• Packet Data Networks
• Frame Relay Networks
o Service Definition
o Numbering and Routing
o Network Performance and QoS
o User-Network and Network-Network
Interfaces
o Access and Interworking Procedures
31.05.2016
ITU-T and ITU-D Workshop - Bangalore (India), 30-31 August 2001
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Open Communications
o IP-related Lower Layer Protocols
o End-to-end QoS Multicast
o
o
o
o
o
o
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Communications
Directory (X.500-series)
ASN.1 (X.680/X.690-series)
Security
Conformance Testing
Open Systems Interconnection
Open Distributed Processing
ITU-T and ITU-D Workshop - Bangalore (India), 30-31 August 2001
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Frame Relay
o UNI and NNI protocols mature
o Performance parameters in place
o Examples of ongoing work:
• number plan interworking of public
data networks with IP networks
• performance when IP is carried over
or interworked with a FR network
• routing between public FR networks
• FR / ATM interworking
31.05.2016
ITU-T and ITU-D Workshop - Bangalore (India), 30-31 August 2001
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IP-related Lower Layer
Protocols and Mechanisms
o IP over SDH using LAPS (X.85)
o Ethernet over LAPS (X.86)
o General arrangements for
interworking between Public Data
Networks and the Internet (X.271)
o Carrying an IP address (IPv4, IPv6)
in an NSAP address (X.213)
31.05.2016
ITU-T and ITU-D Workshop - Bangalore (India), 30-31 August 2001
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End-to-End QoS Multicast
o Recommendations to enable
applications to establish and control
multicast communications involving M
transmitters and N receivers with a
rich set of QoS features over IP-based
networks
o Approved: Multi-peer communications
framework (X.601), Service definition
(X.605)
o Near final: Simplex multicast transport
o Future: Duplex, N-plex
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ITU-T and ITU-D Workshop - Bangalore (India), 30-31 August 2001
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Directory
o Updated edition (X.500-series)
o Public-key and attribute certificate
frameworks (X.509)
o Enhancements in progress:
• Friend Attribute
• Distributed Paged Results
• Maximizing alignment with LDAP
• Additional support for Related Entries
• Enhancement of public key and
attribute certificates
31.05.2016
ITU-T and ITU-D Workshop - Bangalore (India), 30-31 August 2001
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ASN.1
o Work nearing completion:
• Use of ASN.1 to support legacy
protocols (X.692)
• Displaying ASN.1 messages using XML
browsers (X.693)
• Encoding XML-defined messages using
ASN.1 (X.694)
• New edition of ASN.1 (X.680-/X.690-)
o Database of ASN.1 modules
o ASN.1 assistance, books, tools
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ITU-T and ITU-D Workshop - Bangalore (India), 30-31 August 2001
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Security
o Recommendations on security model,
frameworks, protocols, and
techniques approved 1991-2000
o Revisiting future work program
o Considering workshop on security in
2002
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ITU-T and ITU-D Workshop - Bangalore (India), 30-31 August 2001
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Conformance Testing
o Conformance testing methodology
and framework for protocol
Recommendations (X.290-series)
o New work:
• Methodology and framework for
interoperability testing
• Methodology and framework for
performance testing
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ITU-T and ITU-D Workshop - Bangalore (India), 30-31 August 2001
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Further Information
o Study Group 7 meeting in Bangalore
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31.05.2016
28 August - 7 September 2001
ITU web site: www.itu.int
Study Group 7 page:
www.itu.int/ITU-T/com7/index.html
Chairman: hbertine@lucent.com
Secretariat: sebek@itu.int
ITU-T and ITU-D Workshop - Bangalore (India), 30-31 August 2001
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