| Work group:
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Q10/15 (Presentation Web page is available here)
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| Title:
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Interfaces, interworking, OAM, protection and equipment specifications for packet-based transport networks
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| Description:
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1 Motivation
The continued explosive growth of the Internet and other packet-based traffic including cloud computing, data centre connectivity, virtual reality, wireless networks such as IMT-2020/5G including the evolution to IMT 2030/6G and new high-definition video formats are key drivers for the development of new transport network equipment and interfaces related standards for packet networks. To ensure that packet-based transport networks maintain carrier-class performance, it is essential that network protection techniques continue to evolve, and relevant Recommendations are updated. Packet-based transport networks must also continue to provide the operation, administration and maintenance (OAM) capabilities that are essential to enabling carrier-class performance. Such networks are expected to support an increasingly wide variety of highly reliable and high-quality services, which also require effective network control and management. Such factors will drive the need for the revision of existing Recommendations as well as the development of new Recommendations for packet-based transport interfaces and equipment.
Under the responsibility of this Question, Recommendations will be developed to provide the specifications for packet-based equipment, OAM mechanisms, protection switching mechanisms, network interfaces, services, and domain interworking in packet transport networks. This activity will be conducted in close co-operation with related ITU-T Study Groups, IEEE, MEF, IETF and other SDOs, as necessary.
Existing Recommendations may need to be enhanced to take into account transport network control and management paradigms, such as Automatically Switched Optical Network (ASON) and SDN control of transport networks.
The area of responsibility under this Question includes the specification of:
- Equipment functions related to packet layer networks, including equipment functions related to access networks.
- Equipment functions for transport of data/packet traffic (e.g., Ethernet, IP, ATM, MPLS, MPLS-TP).
- Power saving mechanisms for packet transport network equipment in the wider context of ICTs (Information and Communications Technologies).
- Packet transport OAM structures and methods.
- Specification of all protection switching processes related to packet transport networks.
- Network interface characteristics for the packet transport network.
- Packet data transport supervision.
- A framework for defining network-oriented characteristics of Ethernet services in alignment with industry requirements.
Recommendations related to packet transport technologies used in the access environment and not covered by other Questions of ITU-T SG15, are also covered by this Question.
The following major Recommendations in force at the time of approval of this Question, fall under its responsibility: G.8011, G.8012, G.8013/Y.1731, G.8021, G.8031, G.8032, G.8112, G.8113.1, G.8113.2, G.8121, G.8121.1, G.8121.2, G.8131, G.8132, G.8133, I.610, I.630, Y.1710, Y.1711, Y.1712, Y.1713, Y.1714, Y.1720 and Y.1730.
2 Questions
Study items to be considered include, but are not limited to:
- What packet transport interfaces and equipment functions must be specified to enable compatible packet transport equipment in metro and long-distance networks, including considerations regarding protection mechanisms and evolution of the optical transport network?
- What characteristics should be recommended for equipment for the transport of packet based traffic?
- What equipment functions should be specified to allow power savings within packet transport networks?
- What specifications of equipment functions are necessary for the transport of packet based traffic?
- What enhancements are required to the packet transport equipment and network protection Recommendations in order to meet the needs, including support for disaster recovery, of:
o Access networks?
o Data Centre networks?
o Cloud computing?
o Mobile networks including IMT-2020/5G and the evolution to IMT-2030/6G?
o CBR clients?
o Future networks?
- How can network protection provide enhanced survivability capabilities?
- What new Recommendations or enhancements to the existing Recommendations should be developed to reference:
- MEF standards on Ethernet services and network interfaces?
- IEEE 802 standards on local, metropolitan, and other area networks?
- Are there technical issues that need to be clarified or resolved in published and draft Recommendations? Including:
o Clarification of requirements and mechanisms of OAM for packet transport networks. This includes study on end-to-end OAM support for packet-based ubiquitous networks. The OAM functions provide the capability for defect detection, defect localization, topology management and performance management. OAM functions should be able to be applied to point-to-point, point-to-multipoint and multipoint-to-multipoint networks.
o Clarification of generic OAM principles for connection-oriented packet-switched and connectionless packet switched networks.
o Clarification of generic OAM principles under interworking of different network technologies. This includes network interworking and service interworking scenarios.
3 Tasks
Tasks include, but are not limited to:
- Continuation of work (including enhancements and refinements) on the transport Ethernet equipment Recommendation G.8021 in cooperation with IEEE and MEF.
- Continuation of work (including enhancements and refinements) on the transport MPLS-TP equipment Recommendation G.8121, G.8121.1, G.8121.2 in cooperation with IETF.
- Continuation of work (including enhancements and refinements) on the transport Ethernet OAM Recommendation G.8013/Y.1731 in cooperation with IEEE and MEF.
- Continuation of work (including enhancements and refinements) on the MPLS-TP OAM Recommendations G.8113.1 and G.8113.2 in cooperation with IETF.
- Enhancement and improvement of Ethernet linear and ring protection switching Recommendations G.8031 and G.8032.
- Enhancement and improvement of MPLS-TP linear (including dual-homing) and ring protection switching Recommendations G.8131, G.8132, and G.8133.
- Continuation of work on the Ethernet services and network interfaces Recommendations G.8011 (in cooperation with MEF) and G.8012.
- Initiation of work on new Recommendations (in cooperation with IEEE 802) to reference the IEEE 802 standards on local, metropolitan, and other area networks.
- Continuation of work on the MPLS-TP network interfaces Recommendation G.8112.
An up-to-date status of work under this Question is contained in the SG15 work programme (https://www.itu.int/ITU-T/workprog/wp_search.aspx?sp=18&q=10/15).
4 Relationships
Recommendations:
- G.798, G.8321, G.800, G.805, G.806, G.808, G.808.1, G.808.2, G.808.3, G.809, G.872, G.8010, G.8023, G.8051, G.8052, G.8052.1, G.8052.2, G.8110.1, G.8151, G.8152, G.8152.1, G.8152.2, G.7710, G.7711
Questions:
- 2/15, 4/15, 11/15, 12/15, 13/15, 14/15
Study Groups:
- ITU-T SG2 responsible for operational aspects
- ITU-T SG12 responsible for Ethernet and MPLS performance, QoS and QoE.
- ITU-T SG13 responsible for future networks, with focus on IMT-2020 and the evolution to IMT 2030, cloud computing and trusted network infrastructure.
Other bodies:
- MEF on Ethernet services and network interfaces issues
- IEEE 802.1, 802.3 on Ethernet
- IETF working groups on OAM, MPLS transport, PW transport
- Broadband Forum on Ethernet and MPLS
- OIF on Flex Ethernet
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| Comment:
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Continuation of Q10/15
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Rapporteur:
| Mr. | Jessy | Rouyer |
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