19-30 June 2017
ITU-T Study Group 15
Networks, Technologies and Infrastructures for Transport, Access and Home
Study Group 15 Chairman: Stephen Trowbridge
Study Group 15 held its first meeting of the 2017-2020 study period in Geneva from 19-30 June 2017, attended by 272 delegates representing 35 countries.
The meeting received 389 contributions and 483 TDs, an increase from the previous meeting. The meeting observed the 12-day contribution deadline of revised Recommendation ITU-T A.1, and nearly all of the contributions to this meeting were submitted using Direct Document Posting (DDP).
As this was the first meeting of Study Group 15 in the new study period, SG15 established a working party
structure, appointed
Working Party chairmen and vice-chairmen, and appointed
Rapporteurs and Associate Rapporteurs. In consideration of the questions assigned to Study Group 15 by WTSA, delegates agreed to the merger of the two questions on home networking studies (Q18/15 and Q19/15), and developed a merged question text for TSAG endorsement.
SG15 approved one revised Recommendation and one new Amendment, consented 52 texts (10 new Recommendations, 14 revised Recommendations, 20 Amendments, and 8 Corrigenda). Agreement was reached on one new and two revised Supplements, and on a revised Technical Report.
Some noteworthy items include:
- ITU-T Q4/15, responsible for Digital Subscriber Line standardization including G.fast, is celebrating its 20th anniversary in 2017.
- Agreement on a new L-series Supplement
Framework of disaster management for network resilience and recovery.
- Consent of a new Recommendation L.110 "Optical fibre cables for direct surface application": see Newslog:
Ascending Mount Everest with lightweight fibre-optic cable.
SG15 authorized 13 interim face-to-face Rapporteur group meetings to be held prior to the second SG15 plenary of the 2017-2020 study period, 11 virtual meetings, and generated 38 liaison statements. The second plenary meeting of SG15 in the 2017-2020 study period is scheduled 29 January-9 February 2018 in Geneva.
In fulfilling its lead study group responsibilities, SG15 revised the
Access Network Transport (ANT) standards overview and work plan, the
Optical Transport Networks and Technologies (OTNT) standardization work plan, and the
Home Network Transport (HNT) Standards Overview and Work Plan. No updates were made to the
Smart Grid standards overview and work plan in this meeting.
Executive reports from WP Chairmen
WP1/15 – Transport aspects of access, home and smart grid networks
WP1 Chairman: Tom Starr
Q1/15 updated the Access Network Transport (ANT) Standards Overview and Work Plan as well as the Home Network Transport (HNT) Standards Overview and Work Plan.
Q2/15 worked on Passive Optical Networks (PON), producing one document for agreement and five for consent. Work also progressed on G.RoF and G.989.3 Am1. Future work is planned for an amendment of G.984.5, a supplement on 5G wireless requirements for PON, and PON transmission faster than 10 Gbps.
Q4/15 focused on G.fast, VDSL2 reach extension, operation of VDSL2 with strong crosstalk, and the related Recommendations. Work progressed on the new G.mgfast project addressing transmission at rates well above 2 Gbps on metallic wires.
Q15/15 worked on Smart Grid Recommendations focused on G.9901, G.9903, G.9958.
Q18/15 worked on the G.hn family of Recommendations and Visible Light Communication (G.vlc) and Optical Camera Communication (G.occ).
The list of CIT activities in other organizations related to technologies based on Recommendations from WP1/15 was updated.
WP2/15 – Optical technologies and physical infrastructures
WP2 Chairman: Noriyuki Araki
WP2 made good progress on the development of a number of Recommendations and produced three new and one revised Recommendations for consent, one supplement and one Technical Report on the L-series Recommendations for agreement at this meeting. WP2 produced 3 liaisons and agreed two new work items related to deployment of FTTH. WP2 also scheduled one interim meeting, one virtual meeting and a number of correspondence activities to progress the work.
Q5/15 worked on characteristics and test methods of optical fibres and cables and consented revised Recommendation G.650.3
Test methods for installed single-mode optical fibre cable links.
Q6/15 made progress on amplified multichannel dense wavelength division multiplexing for 100G applications focused on G.698.2. Q6 also made progress on G.metro and reached agreements on revising G.695 and G.959.1 following the generic IEEE specification methodology towards consent at the February 2018 meeting.
Q7/15 worked on optical component specifications and consented new Recommendation L.404
Field mountable single-mode optical fibre connectors.
Q8/15 worked on optical fibre submarine cable systems focused on the revision of G.sup.41 and open cable commissioning using GOSNR (Generalized Optical Signal to Noise Ratio).
Q16/15 worked on optical physical infrastructures and consented new Recommendations L.110
Optical fibre cables for direct surface application and L.206
Outdoor optical cross connect cabinet. Progress was also made on new Recommendations related to optical fibre cable construction, installation methods and optical infrastructures, such as optical fibre cables for in-home application and general outdoor application.
Q17/15 worked on network resilience and recovery and agreed L.sup.35
Framework of disaster management for network resilience and recovery. Progress was also made on L.wdc
Water detection in closures/cabinets for maintenance of optical fibre cable networks towards consent at the February 2018 meeting.
WP3/15 – Transport network characteristics
WP3 Chairman: Malcolm Betts
WP3/15 agreed to start work on a new Technical Report (TR) GSTR TN5G on
Transport network support of IMT-2020/5G. The objective of GSTR TN5G is to rapidly document the best current view of a reference model for the IMT 2020/5G transport network and a set of deployment scenarios. GSTR TN5G will provide guidance that will allow the other Questions to work efficiently in the development of new, revised or amended G series Recommendations that will enable the Transport Network to support IMT 2020/5G. It is anticipated that, where necessary, the corresponding work items will be added to the work programme in February 2018.
Q3/15 Updated the Optical and other Transport Networks & Technologies Standardization Work Plan.
Q9/15 consented new Recommendations G.873.3 (OTN protection switching - Shared Mesh Protection) and G.8132 (MPLS-TP shared ring protection), a revision of G.873.1 (OTN: linear protection), and a corrigendum to G.8032 (Ethernet ring protection). New work was initiated on a new Recommendation on MPLS-TP dual homed protection, a revision of G.808.2, and amendments to G.8031 and G.808.
Q10/15 consented G.8112, G.8113.2 and G.8121 amendments and progressed work on Ethernet and MPLS-TP equipment. Future work is planned to align G.8021 with Q11/15's new G.8023, correct G.8013/Y.1731, and revise G.8011 and the G.8121 series.
Q11/15 consented a G.798 revision, corrigenda to G.709 and G.806, and agreed revised G.Sup58 (OTN Module Framer Interfaces). Much of the meeting was dedicated to IMT2020/5G transport topics, including work in coordination with Q12/15. Work progressed on stable text for the new long-reach OTU4 and FlexO interface Recommendations. Further extensions were considered for both G.709 and G.709.1.
Q12/15 continued its work on architecture for SDN control of transport networks jointly with Q14/15. Future work is planned on architecture for media networks and generalizing management architecture.
Q13/15 Work at this meeting concerned continuation of investigating future networks synchronization needs (e.g., 5G) and solutions for accurate time synchronization delivery (e.g. enhanced synchronous Ethernet). Thirteen documents were consented, among these, new Recommendations on Transparent clock (G.8273.3), Partial timing support network limits (G.8271.2) and enhanced Primary Reference Clock (G.811.1). A new work item (technical report on GNSS) was agreed.
Q14/15 consented three revisions and one amendment for the Recommendations (G.874, G.7714.1, G.8051 Amd.1, and G.8151). It continued its existing works and initiated three new work items to study management of synchronization networks (G.sync-mgmt), media (G.media-mgmt), and information/data models for Ethernet transport OAM (G.8052.1). Q14/15 plans to hold two interim meetings in September and December in 2017.
Decisions (ITU-T SG15, June 2017)
Approval
WP1/15 – TAP Approval
|
Recommendations |
N=new
R=rev. |
Title |
Text in Doc(s) |
| G.9700 (2014) Amd.2 | N | Fast access to subscriber terminals (G.fast) - Power spectral density specification (2014) Amendment 2 | TD109/P |
| G.9901 | R | Narrowband orthogonal frequency division multiplexing power line communication transceivers – Power spectral density specification | COM15-R34 |
WP2/15 - TAP Approval
|
Recommendations |
N=new
R=rev. |
Title |
Text in Doc(s) |
| None | | | |
WP3/15 - TAP Approval
|
Recommendations |
N=new
R=rev. |
Title |
Text in Doc(s) |
| None | | | |
WP1/15 - AAP Approval
Recommendation
(links to AAP pages) |
N=new R=rev. |
Title |
Text in Doc(s) |
| None | | | |
WP2/15 - AAP Approval
|
Recommendations |
N=new
R=rev. |
Title |
Text in Doc(s) |
| None | | | |
WP3/15 - AAP Approval
|
Recommendations |
N=new R=rev. |
Title |
Text in
Doc(s) |
| None | | | |
Determination
WP1/15 - Determination
|
Recommendations |
N=new R=rev. |
Title |
Text in Doc(s) |
| None | | | |
WP2/15 - Determination
|
Recommendations |
N=new R=rev. |
Title |
Text in Doc(s) |
| None | | | |
WP3/15 - Determination
|
Recommendations |
N=new R=rev. |
Title |
Text in Doc(s) |
| None | | | |
Consent
WP1/15 - Consent
|
Recommendations |
N=new R=rev. |
Title |
Text in Doc(s) |
| G.9903 | R | Narrowband orthogonal frequency division multiplexing power line communication transceivers for G3-PLC networks | TD50 R1/P |
| G.996.2 (2009) Amd.5 | N | Single-ended line testing for digital subscriber lines (DSL) Amendment 5 | TD49R1/P |
| G.993.2 (2015) Amd.3 | N | Very high speed digital subscriber line transceivers 2 (VDSL2) (2015) Amendment 3 | TD62R2/P |
| G.993.5 (2015) Amd.2 | N | Self-FEXT cancellation (vectoring) for use with VDSL2 transceivers (2015) Amendment 2 | TD63R2/P |
| G.9977 (2016) Cor.1 | N | Mitigation of interference between DSL and PLC (2016) Corrigendum 1 | TD68R1/P |
| G.9701 (2014) Amd.4 | N | Fast access to subscriber terminals (G.fast) - Physical layer specification (2014) Amendment 4 | TD78R1/P |
| G.9701 (2014) Cor.4 | N | Fast access to subscriber terminals (G.fast) - Physical layer specification (2014) Corrigendum 4 | TD79R1/P |
| G.994.1 (2012) Amd.9 | N | Handshake procedures for digital subscriber line transceivers (2012) Amendment 9 | TD85R1/P |
| G.997.1 (2012) Amd.7 | N | Physical layer management for digital subscriber line transceivers (2012) Amendment 7 | TD86R1/P |
| G.997.2 (2015) Cor.3 | N | Physical layer management for G.fast transceivers (2015) Corrigendum 3 | TD87/P |
| G.997.2 (2015) Amd.4 | N | Physical layer management for G.fast transceivers (2015) Amendment 4 | TD88R1/P |
| G.998.4 (2015) Cor.1 | N | Improved impulse noise protection
for digital subscriber line (DSL) transceivers Corrigendum 1 | TD94/P |
| G.987.2 (2016) Amd.1 | N | 10-Gigabit-capable passive optical networks (XG-PON): Physical media dependent (PMD) layer specification Amendment 1 | TD56R1/P |
| G.988 | R | ONU management and control interface (OMCI) specification | TD57R1/P |
| G.989.2 (2014) Amd.2 | N | 40-Gigabit-capable passive optical networks 2 (NG-PON2): Physical media dependent (PMD) layer specification Amendment 2 | TD58R2/P |
| G.9807.1 (2016) Amd.1 | N | 10-Gigabit-capable symmetric passive optical network (XGS-PON) Amendment 1 | TD59R1/P |
| G.9807.2 | N | 10-Gigabit-capable symmetric passive optical network (XGS-PON): Reach Extension | TD60R1/P |
| G.9961 (2015) Cor.4 | N | Unified high-speed wireline-based home networking transceivers – Data link layer specification: Corrigendum 4 | TD81R1/P |
| G.9978 | N | Secure admission in G.hn network | TD75R1/P |
| G.9961 (2015) Amd.3 | N | Unified high-speed wireline-based home networking transceivers – Data link layer specification: Amendment 3 | TD104/P |
| G.9973 | R | Protocol for identifying home network topology | TD105/P
A.5 in TD110/P |
WP2/15 - Consent
|
Recommendations |
N=new R=rev. |
Title |
Text in Doc(s) |
| G.650.3 | R | Test methods for installed single-mode optical fibre cable links |
TD89R2/P |
| L.404 (ex. L.fmc) | N | Field mountable single-mode optical fibre connectors |
TD52R1/P |
| L.206 (ex. L.oxcon) | N | Requirements for Passive Optical Nodes: Outdoor Optical Cross-Connect Cabinet |
TD67R3/P |
| L.110 (ex. L.dsa) | N | Optical fibre cables for direct surface application |
TD71R1/P |
WP3/15 - Consent
|
Recommendation |
N=new R=rev. |
Title |
Text in
Doc(s) |
| G.873.1 | R | Optical Transport Network (OTN): Linear protection | TD41/P |
| G.873.3 (ex G.odusmp) | N | Optical Transport Network (OTN) - Shared Mesh Protection | TD42R1/P |
| G.8032 (2015) Cor.1 | N | Ethernet ring protection switching Corrigendum 1 | TD98/P |
| G.8132/Y.1383 | N | MPLS-TP Shared Ring Protection | TD35R1/P
A.5 in
TD100/P |
| G.8112/Y.1371 (2015) Amd.1 | N | Interfaces for the MPLS Transport Profile layer network: Amendment 1 | TD36R1/P |
| G.8113.2/Y.1372.2 (2015) Amd.1 | N | Operations, administration and maintenance mechanisms for MPLS-TP networks using the tools defined for MPLS: Amendment 1 | TD43R1/P
A.5 in
TD101/P |
| G.8121/Y.1318 (2016) Amd.1 | N | Characteristics of MPLS-TP equipment functional blocks: Amendment 1 | TD38/P |
| G.709 (2016) Cor.1 | N | Interfaces for the optical transport network Corrigendum 1 | TD106/P |
| G.798 | R | Characteristics of optical transport network hierarchy equipment functional blocks | TD70R1/P |
| G.806 (2012) Cor.3 | N | Characteristics of transport equipment - Description methodology and generic functionality: Corrigendum 3 | TD51R1/P |
| G.781 | R | Synchronization layer functions | TD77R1/P
A.5 in
TD102R1/P |
| G.811.1 | N | Enhanced Primary Reference Clock | TD53R1/P |
| G.8263/Y.1363 | R | Timing characteristics of packet-based equipment clocks | TD66R1/P |
| G.8264/Y.1364 | R | Distribution of timing information through packet networks | TD90R1/P |
| G.8271/Y.1366 (2016) Amd.1 | N | Time and phase synchronization aspects of telecommunications networks | TD82R1/P |
| G.8271.1/Y.1366.1 | R | Network limits for time synchronization in Packet networks | TD83R1/P |
| G.8271.2/Y.1366.2 | N | Network limits for time synchronization in packet networks with partial timing support from the network | TD84R1/P
A.5 in
TD103/P |
| G.8272.1/Y.1367.1 (2016) Amd.1 | N | Timing characteristics of enhanced primary reference time clocks Amendment 1 | TD96/P |
| G.8273.2/Y.1368.2 (2017) Amd.1 | N | Timing characteristics of telecom boundary clocks and telecom time slave clocks - Amendment 1 | TD64R2/P |
| G.8273.3/Y.1368.3 | N | Timing characteristics of telecom transparent clocks | TD65R1/P |
| G.8275/Y.1369 | R | Architecture and requirements for packet-based time and phase delivery | TD76R1/P |
| G.8275.1/Y.1369.1 (2016) Amd.1 | N | Precision time protocol telecom profile for phase/time synchronization with full timing support from the network: Amendment 1 | TD91R1/P |
| G.8275.2/Y.1369.2 (2016) Amd.1 | N | Precision time Protocol Telecom Profile for time/phase synchronization with partial timing support from the network: Amendment 1 | TD92R1/P |
| G.874 | R | Management aspects of optical transport network elements | TD72R2/P |
| G.7714.1/Y.1705.1 | R | Protocol for automatic discovery in transport networks | TD40R1/P
A.5 in
TD97/P |
| G.8051/Y.1345 (2015) Amd.1 | N | Management aspects of the Ethernet Transport (ET) capable network element: Amendment 1 | TD45R1/P |
| G.8151/Y.1374 | R | Management aspects of the MPLS-TP network element | TD39R1/P |
Agreement
WP1/15 - Agreement
Doc. #/
Ref. |
N=new R=rev. |
Title |
Text in Doc(s) |
| G.sup.51 | R | Passive optical network protection considerations | TD61R1/P |
WP2/15 – Agreement
Doc. #/
Ref. |
N=new R=rev. |
Title |
Text in Doc(s) |
| L.sup.35 to L-300series | N | Framework of disaster management for network resilience and recovery |
TD44R3/P |
| | R | ITU-T Technical Report "Guide on the use of ITU-T L-series Recommendations related to optical technologies for outside plant" |
TD74R4/P |
WP3/15 - Agreement
Doc. #/
Ref. |
N=new R=rev. |
Title |
Text in Doc(s) |
| G.Suppl.58 | R | Optical transport network (OTN) module frame interfaces (MFIs) | TD46R1/P |
