(Continuation of Question 9/15)

Motivation

The explosive growth of the Internet, emergent standardisation of Ethernet rates greater than 100 Gbit/s (e.g. 200 Gbit/s, 400 Gbit/s), as well as 25 Gbit/s and 50 Gbit/s, and other packet based traffic have dramatically increased the bandwidth, and thus traffic carrying capacity, of optical networks and driven OTN evolution. The emergence of packet transport networking has also motivated the need for multi-layer survivability strategies.  Further, the emergence of SDN offers potentially new options for providing network restoration. In order to ensure that transport networks based on these new technologies maintain carrier-class performance, it is essential that network protection/restoration techniques continue to evolve and relevant Recommendations are updated.

Responsibilities under this Question include the following areas of standardization related to these new technologies:

Recommendations related to transport technologies (e.g., SDH, PDH, OTN, MPLS-TP, Ethernet and other packet-based 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.808.1, G.808.2, G.808.3, G.841, G.842, G.873.1, G.873.2, G.8031, G.8032, G.8131, I.630 and Y.1720.

Question

What additional protection/restoration mechanisms for transport equipment should be recommended to provide enhanced survivability capabilities and a cohesive strategy for multi-domain and/or multi-layer survivability interactions?

Study items to be considered include, but are not limited to:

 

Tasks

Tasks include, but are not limited to:

• Enhancements to OTN protection mechanisms, for example nested protection schemes and M:N ODUk SNC.
• Enhancement to Recommendations for other survivability techniques including per packet priority-based protection switching for packet based transport networks.
• Enhancement and improvement of linear and ring protection switching Recommendations for OTN and packet-based technologies.
• Clarification of relationships between protection switching and restoration technologies (including the use of SDN for data plane restoration).
• Clarification of relationships between survivability function of a packet-based transport and survivability function in other layers or other transport technologies (e.g., SDH, OTN, etc.).
• Clarification of interworking between different protection schemes within a layer network (e.g. interworking linear and ring protection).
• Enhancement to relevant Recommendations to include protection/restoration of services that use broadcast and multicast functionality.
• Enhancement to relevant Recommendations to include partial protection switching in rooted multipoint service (RMPS) and multipoint to multipoint service.
• Develop additional Recommendations from progress on the above study items.
• Developing, as appropriate, protection techniques for emerging technologies including metro applications.

NOTE − An up-to-date status of work under this Question is contained in the SG15 Work Programme at: http://www.itu.int/ITU-T/workprog/wp_search.aspx?sg=15  

Recommendations:

• G.705, G.707, G.709, G.781, G.783, G.784, G.798, G.798.1, G.806, G.872, G.874, G.7710, G.8021, G.8051, G.8080, G.8010, G.8110, G.8021, G.8110.1, G.8121, G.8151, and G.993.x

Questions:

• Primary: Q10/15, Q11/15, Q12/15, and Q14/15
• Secondary: Q2/15, Q4/15, Q6/15, and Q13/15

Study Groups:

• ITU-T SG2 responsible for telecommunication management
• ITU-T SG13 responsible for 5G and future networks including cloud computing, mobile, and next-generation networks
• ITU-T SG12 responsible for Ethernet and MPLS error performance

Standardization bodies, forums and consortia:

• IETF working groups related to MPLS-TP protection
• MEF on Ethernet Equipment Protection
• IEEE 802.1, 802.3 on Ethernet Protection
• Broadband Forum