(Continuation of Question 2/15)
Recommendations for point-to-point and point-to-multi point access systems, such
as the G.984.x G-PON series, have allowed telecommunications manufacturers to
develop, inter-operable access equipment. Practical experience with the design
and deployment will necessitate revision of these Recommendations to include,
for example, enhanced services, better interoperability (for example via
Implementers' Guides), use of enhancement band, higher split ratios and
To increase service capability the use of new technologies such as wavelength
division multiplexers and optical amplifiers, or new system approaches, such
hybrid TDMA/WDMA systems, in the access network, will necessitate the
development of new Recommendations.
Fibre access systems need to support a range of service capabilities at the
edge. Wireless, wireline and fibre (e.g. G.65x and Plastic Optical Fibre (POF))
will be needed. Economies are needed for fibre access deployment to become
prevalent as a mass-market solution. Demand will be driven by factors such as:
the ability to carry interactive and broadcast services (e.g. residential video,
HDTV), managed bandwidth to multiple Internet Service Providers (ISPs), together
with higher quality of service and improved resilience. Solutions are required
for a wide range of market segments and situations including: business,
small-to-medium-enterprise, small-office-home-office, residential, green field,
and network upgrade.
Demand for dedicated GbE and 10GbE services initially to business users is
increasing. New techniques are needed to increase performance and reduce costs
for both dedicated and shared bearer services. Both access and metro networks
should be considered when offering such access services, because currently,
access nodes are sometimes bypassed to minimize overall network cost. Both
Point-to-point and point-to-multi-point solutions will be considered.
Integration of all services onto a single backhaul fibre network is an important
economic consideration for network operators.
To be successful, Q2 needs to harmonize with other bodies which have a strong
optical access industry role, such as IEEE and IEC. The following major
Recommendations, in force at the time of approval of this Question, fall under
its responsibility: G.981, G.982, G.983, G.984 and G.985 series.
What new or modifications to existing Recommendations are needed to:
- Enable next generation PON architecture and technology to offer improved
services and economics?
- Integrate access and metro/backhaul networks into one seamless optical access
and aggregation network?
- Allow increased use of Wavelength Division Multiplexing (WDM) in optical
access systems and architectures?
- Allow optical access systems to operate at higher bit-rates?
- Serve a mixture of optical, copper and radio (broadband) final customer
connections to the same optical access system, with simplified remote
- Allow individual customers on a live G-PON to be upgraded to higher capacity
next generation systems without impacting on other users’ traffic?
What new Recommendations need to be developed to:
- Allow systems to evolve to higher split ratios physically and logically?
- Meet requirements for longer reach in the access network?
- Allow full services over Ethernet (e.g., TDM over Ethernet, encapsulation
techniques, Quality of Service (QoS), management of Ethernet services)?
What enhancements or new Recommendations are needed to:
- Enable new resilience requirements to be achieved in the fibre access network;
e.g. dual cards, dual parenting resilience, switchover procedures, alternative
paths or drop transmission media?
- Add new Optical Network Termination (ONT) Management Control Interface [OMCI]
requirements; e.g. management systems support of new services, (e.g.
configuration, fault performance) or additional attributes to existing managed
What enhancements to existing Recommendations:
- need to be defined to improve interoperability?
- are needed to enable legacy or other services on a fibre access network; e.g.
telephony, data, video?
What new or modifications to existing Recommendations are needed to enable fibre
access systems to be provided which support:
- multiple drop media?
- carrier grade services?
What enhancements to existing Recommendations are required to provide energy
savings directly or indirectly in Information and Communication Technologies (ICTs)
or in other industries?
What enhancements to developing or new Recommendations are required to provide
such energy savings?
Study items to be considered include, but are not limited to:
- Next generation PON architecture and technology
- New long-reach access system(s) for access/metro-integrated applications based
on WDM access and/or enhanced TDM access technologies.
- How to specify ONT’s for the consumer market?
- Impact of new component technology on optical access networks.
- How to ensure the optical systems contribute to the end-end QoS for packet
- How to ensure the maximum service capability for Ethernet and Wireless Local
Area Network (WLAN) edge networks?
- How to provide for video services?
- Interoperability and physical interconnect conformance.
- The definition of access demarcation point in the light of consumer-owned
optical network terminations.
- Modulation schemes over fibre access
- What is the service capacity and requirements outlook for access?
- How to ensure efficient inter-connection between fibre access systems and DSL
Tasks include, but are not limited to:
- Maintenance and enhancements of G.983, G.984 and G.985 series Recommendations
with regard to capacity, interoperability, management and control interfaces,
survivability, spectral management, split ratios or other requirements
- Draft a new Recommendation on general characteristics of the new long-reach
access system(s) for access/metro-integrated applications.
- Draft one or more new Recommendation series to describe the next generations
of optical access systems
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
- G.981, G.982, G.983, G.984 and G.985 series.
- Q1/15, Q4/15, Q6/15, Q9/15, Q11/15 and Q12/15.
- ITU-T SG2 on management aspects
- ITU-T SG5 on hybrid fibre/copper cables for outside plant
- ITU-T SG9 on television and sound transmission
- ITU-T SG13 on Multi-Protocol Label Switching (MPLS) layer characteristics
Standardization bodies, forums and consortia:
- IEC TC86 and its sub-committees on devices and other topics
- Broadband Forum (ex DSL Forum) on network architectures and management
- IETF on MIB
- IEEE 802 on Optical access systems, Ethernet and WLAN
- ATIS Committee NIPP and its subcommittee on Optical Access Networks (OAN)
- ATIS Committee NIPP and its subcommittee on Telecom Energy Efficiency (TEE)