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ITU-T Workshop on NGN and its Transport Networks |
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Abstracts |
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ITU-T Workshop on NGN and its Transport Networks
Kobe, Japan, 20-21 April 2006
Contact: tsbworkshops@itu.int
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Session 1: Opening Session |
Speaker: Masao MATSUMOTO, Ministry of
Internal Affairs and Communications
Title of Presentation: Japanese strategy for NGN
IP network services are expanding rapidly in line with technological
innovation and the progress of broadband network. In response to this trend,
telecommunications carriers have presented their plans to shift the current
network infrastructure to an IP based one.
Development of the IP network will extend the possibility of producing
various unique applications and contribute to the realization of the
ubiquitous network society at an early stage. In addition, cost reduction is
expected on both the user and operator sides.
My presentation will include the current situation in Japan concerning IP
network infrastructure and services, merits and problems regarding the Next
Generation Network (NGN), Japanese activities by the government and private
sector, and expectations for international standardization.
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Speaker: Yuji INOUE, Chief Technology Officer, NTT
Title of Presentation: Key note 2: Broadband service deployment
experiences in Japan
This presentation describes current situation on broadband services in
Japan, especially NTT's efforts for providing cost effective FTTH service.
The outline of NTT's NGN deployment project is also presented with "Field
Trial" which is planned in the end of this year.
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Speaker: Chae-sub LEE (FGNGN Chairman)
Title of Presentation: NGN standards overview and the workshop objectives
This presentation explains some of key issues why ITU-T tackled of this
subject from industry and market's point of view. These were key objectives
which leaded ITU-T NGN standards and its activities.
Summary of current NGN related standard status also contained in this
presentation. Finally it is explained objectives of this workshop between
NGN and Transport.
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Speaker: Brian MOORE, Standards Manager, Lucent
Technologies
Title of Presentation: ITU-T SG13 activities on the NGN and its Transport
Networks
This presentation will describe the role of Study Group 13 in the NGN
standardization activities and will introduce the ITU-T NGN Global Standards
Initiative (NGN-GSI).
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Session 2: NGN Architecture and Requirements |
Speaker: Marco CARUGI, Nortel
Title of Presentation: Service requirements and capabilities
The presentation will provide an overview of key requirements and capabilities from the
perspective of users and service providers for the support of NGN services.
Starting with an introduction to the main objectives of NGN Release 1 in various dimensions,
some achievements by two major NGN standardization initiatives, ITU-T Focus Group on NGN and
ETSI TISPAN, will be examined.
Driven by high market expectations for new and enhanced service features in NGN, some major
topics for future standardization work in the service and capabilities areas will be finally
introduced.
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Speaker: Keith Knightson, Industry Canada
Title of Presentation: NGN: Basic Architecture & Interesting Issues
This presentation will outline the basic architectural principles of NGN, as
a precursor to subsequent sessions. In particular, it will
• Introduce the basic architectural separations
• Introduce the concept of subsytem components
• List the architectural challenges
• Summarize work of ITU-T Study Group 13 on architecture
• Identify areas for further study
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Speaker: Dick KNIGHT, BT Group plc
Title of Presentation: IMS based NGN Architecture and its application
This presentation will provide a brief overview of the IP Multimedia
Subsystem, its key features and functional elements. The adaptation of the
IMS for NGN use, and its benefits will be explored, and the architecture
provided. The presentation will then consider the support for PSTN/ISDN
replacement, covering the differences between simulation and emulation. The
IMS-based support for PSTN/ISDN legacy equipment and interfaces will be
shown to derive the service control portion of the ITU-T NGN architecture.
This will be compared with the architecture in ETSI TISPAN and the BT 21st
century network.
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Speaker: Anett Schülke, Senior Research Staff
Member, NEC Europe Ltd.
Title of Presentation: Mobile Applications and Services for NGN networks
The presentation will provide an overview of selected Mobile application
and Services for NGN networks. A short overview about the OMA architecture
and its logical presentation as OSE will be given. The selected mobile
services for IMS like Push-to-talk Over Cellular, Presence, Group Management
as well as non-IMS based services will be introduced, technically and its
current status of enabler development. The presentation will conclude with
an overview of NEC’s view of NGN service architecture in the context of
integrating content and communication services.
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Session 3: Network QoS and Control |
Speaker: Hui-Lan Lu, Lucent Technologies
Title of Presentation: Resource and Admission Control for NGN
The advent of Next Generation Networks (NGN), which are characterized, among
other things, by the prevalent use of a general packet transport for
delivering a wide range of applications, gives rise to the need for
supporting quality of service as dictated by various applications
dynamically. The presentation will review an emerging standard approach to
dynamic application-driven transport resource management—namely the ITU-T
Resource and Admission Control Functions (RACF). As a bridging layer between
the NGN service control and transport, RACF augments the native transport
QoS support and allows transport congestion to be managed at the service
control layer. In addition, RACF naturally supports network border control
(e.g., topology hiding or packet filtering). The presentation will focus on
the architectural aspects of RACF taking into consideration the separation
of the services and transport in NGN and the diversity of end-to-end paths
due to varying transport technologies, multiple operator domains, and vastly
different endpoint capabilities.
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Speaker: Keith Mainwaring, Cisco Systems,
Inc.
Title of Presentation: NGN QoS Control Architecture and Protocols
The protocols for Resource and Admission Control specified in ITU-T and
ETSI TISPAN will be reviewed in this presentation. In addition, some ideas
on future developments in QoS control will be presented.
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Speaker: Dinesh MOHAN, Nortel
Title of Presentation: NGN OAM Capabilities
This presentation covers the capabilities required for NGN Operations,
Administration and Maintenance (OAM) to allow QoS and resource control. OAM
capabilities in past packet technologies have been limited. As a
consequence, the dream to manage and control resources in a manner similar
to circuit switched networks has remained unrealized. Some of the emerging
technologies and networks e.g. Ethernet have started addressing these OAM
capabilities. OAM capabilities across different layers can interact to
realize simple, scalable, and manageable NGN networks and services.
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Speaker: Tobey Trygar, Telcordia
Title of Presentation: Identification and Specification of NGN Service and
Control Requirements
As the scope and complexity of service offerings continues to grow, a
structured approach for developing QoS specifications and metrics is
essential. Clear service specifications are especially important for NGN
Services that have complex requirements, extensive impacts for missed
commitments, and limited opportunities for assessing performance prior to
actual use. The service QoS requirements are the fundamental drivers for
network behavior.
The presentation begins by describing a service performance definition
context. Next a typical NGN physical network is introduced along with the
various protocols used to encapsulate IP packets. Three types of logical
service information flows are then identified. The presentation concludes by
summarizing the preceding material in terms of an OSI layered model and by
posing questions intended to highlight the need for coordinated intra and
inter-layer signalling needed to support service QoS requirements.
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Session 4: Transport Network Control (ASON, GMPLS and Control plane
management) |
Speaker: Alan McGUIRE, BT (UK)
Title of Presentation: Business Drivers
Business Drivers for the Introduction of Control Plane Technology Why
should network operators introduce control plane technology for SDH and
optical networks? What types of service will this enable? This talk examines
some of the business drivers for introducing control plane technology such
as the ITU-T Automatic Switched Optical Network (ASON) into transport
networks. Essential to the deployment of control plane technology is the
ability to interwork with existing operational support systems to provide
support for existing services and to allow the development of new ones.
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Speaker: Kam LAM, Lucent Technologies
Title of Presentation: Management of ASON-capable Network and its Control
Plane
ASON-capable network supports bandwidth-on-demand applications through
automatic connection set-up/modification/restoration/release, transport
resource discovery, and connectivity verification. These capabilities are
essential to the realization of Next Generation Network (NGN) as they enable
timely delivery and speedy provisioning of NGN services and reduce
tremendous operations expenses (through automation) and capital expenses
(through better resource utilization and tracking). However, successful
deployment and maintenance of ASON-capable network require an effective
management solution for the ASON network and its control plane. This
presentation describes the role of ASON-capable network in NGN, the
requirements for managing such a network and its control plane, how these
requirements are addressed in the standards, and the challenges and issues
to be resolved.
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Speaker: Stephen SHEW, Nortel
Title of Presentation: Distributed Signalling and Multiple Transport
Layers
The distributed signalling function is a control plane capability to
establish and release connections in the transport plane. This presentation
will focus on recent architecture, protocol, and interop work on signalling
that involves multiple transport planes. This is applicable to
point-to-point Ethernet services over control plane enabled transport
networks.
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Speaker: Adrian FARREL, Old Dog Consulting
Limited
Title of Presentation: Introduction to the Path Computation Element
Network planning and path optimization require a full view of the
resources available within a network so that the best path for a connection
can be computed. However, many network topologies make it impossible for any
network entity or management element to gain such a view. Constraints of
privacy, confidentiality, scalability, layering, or deployment may make it
impossible for a single computation to produce the best path through a
network.
At the same time, new and advanced functional requirements (such as
end-to-end diversity of protection paths, or point-to-multipoint
connections) increase the complexity of path computation making it harder
for existing components to determine suitable routes.
The Path Computation Element (PCE) is a new functional component proposed by
the IETF designed to solve the twin problems of path computation visibility
and complexity. This brief talk will introduce the PCE architecture,
illustrate how PCEs can be used to solve various inter-domain routing
problems, and show how the concept fits within the scope of ASON routing
(G.7715).
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Speaker: Jonathan Sadler
Title of Presentation: Routing in Multi-Layer Transport Networks
Convergence of the network naturally occurs to avoid the need for service
specific infrastructures. However, as convergence occurs, the technology
selected for the convergence layer (i.e. WDM, SDH, ATM, MPLS, IP) is
influenced by the service mix that a carrier expects to carry in that
particular portion of the network. This leads to different convergence
technologies being chosen in different parts of the network.
The selection of different convergence technologies doesn’t change the fact
that customers are still going to request services that traverse the entire
network. Consequently, control plane mechanisms must support the routing of
service requests through a series of sub-networks using dissimilar
convergence layers. To facilitate this, the control plane needs to
understand the multi-layer structure of the network, and how services
requested are accommodated.
This presentation discusses the ASON architecture for multi-layer routing,
and the information necessary to represent the relationship between the
resources in different layer networks to allow for end-to-end multi-layer
path computation.
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Session 5: Market Opportunities and Challenges |
Speaker: Yasunao MISAWA, KDDI Corporation,
Japan
Title of Presentation: All-IP migration of telephone network and further
evolution toward fixed-mobile network convergence
KDDI made an announcement in 2004 that they would replace all the
circuit switches of their wireline telephone network with softswitches by
March, 2008. It has been the world’s fastest all-IP migration plan ever
released. The plan also includes the introduction of hybrid telephony system
which combines the all-IP core network with the legacy subscriber lines and
legacy telephone terminals. The early completion of the all-IP migration is
expected to bring simplicity and flexibility, hence cost efficiency and
smooth service implementation.
In the migration plan above, their mobile network was left behind for
another challenge. KDDI disclosed in 2005 their “Ultra 3G” concept,
according to which, a variety of their packet access networks would be
connected to a consolidated packet core network. The core network would be
compliant to 3GPPs MMD/IMS. The concept aims eventual all-IP migration of
their mobile network together with the deployment of CDMA2000 EV-DO Rev. A/B
and possibly other radio access networks such as WiMAX. The concept also
includes fixed-mobile network convergence because not only radio but also
wireline packet access networks would be connected to the consolidated core
network. KDDI’s evolution steps toward NGN will be presented.
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Speaker: Ms. Huiling Zhao, China Telecom,
China
Title of Presentation: Call server based evolution scenario in China
NGN consists of a number of new techniques in service stratum and
transport stratum, such as IMS, Call Server, RACF, NACF etc. From the point
view of operator, how to choose those new technique (IMS or Call Server) and
how to migrate the network become the key issues. The development of soft
switch industrial standards activities in China and some considerations of
China Telecom on network evolution will be introduced in the presentation.
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Speaker: Fan DONGYANG, Siemens Communication
Networks Ltd., Beijing (SCNB)
Title of Presentation: Evolution from PSTN to NGN in China
A programmatic approach to evolve call server based networks to IMS NGN.
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Session 6: Broadband access (VDSL access, PON access, Cable access and
WiMAX) |
Speaker: Dr. Martin Schenk, VP Marketing
COM Access, Infineon Technologies
Title of Presentation: VDSL2 - taking broadband access evolution to the next
level
Defined by the ITU SG15 in May 2005, VDSL2 (Very-High-Bit-Rate Digital
Subscriber Line 2), or ITU G.993.2, is now ready for mass deployment. 2006
will be the year of VDSL2 with deployments scheduled by major Telecom
operators in Europe, Asia and Japan.
VDSL2 provides symmetric data rates of 100Mbits/s over short distances and
“ADSL2+like” long reach performance along with improved Quality of service (QoS)
features. These features make VDSL2 ideal for enabling the wide deployment
of Triple Play services such as voice, video/VoD, data, high definition
television (HDTV), Interactive gaming and more. Fully backwards compatible
and interoperable with ADSL/2/2+, VDSL2 also allows carriers to seamlessly
and cost efficiently upgrade their existing xDSL networks making them
“future-ready” by gradually changing CO or street cabinets equipment to
VDSL2 while their end users maintain their ADSL/2/2+ modems at home.
This session will provide a short introduction to VDSL2, introduce the major
improvements in comparison to VDSL1 and ADSL2+ and provide an inside look
into real-life deployment scenarios, including network architecture,
supported services and business cases.
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Speaker: Yukio NAKANO, Hitachi
Title of Presentation: Technologies and Applications of Passive Optical
Networks
Because of the very wide bandwidth of the optical fiber, Passive Optical
Networks (PON) is the most promising and ultimate technology among several
broadband access technologies. Since BPON was emerged in Japan in 2002, PON
systems have been massively deployed throughout Japan and other areas such
as North America. The main applications are very high speed Internet access
up to 100 Mbit/s and Voice over IP (VoIP). However, video is also becoming a
major application of the high capacity PON systems. Recommendation G.983
series played a very important role in the quick technology development of
economical BPON systems. In ITU-T, GPON standard (Recommendation G.984
series) is now available and has become mature. The main stream of the GPON
is one with 2.4 Gbit/s downstream and 1.2 Gbit/s upstream that enables to
distribute several channels of IPTV including high definition TV (HDTV) in
addition to high speed Internet access to each household. GPON is considered
the best PON technology for triple-play applications including HDTV in very
near future and massive GPON deployment will be started very soon.
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Speaker: Naoyoshi NAKAMURA, Japan
Broadcasting Corporation
Title of Presentation: Broadband access technology and standardization for
integrated cable TV networks
Current status of the cable TV technology and standardization activity in
ITU-T Study Group 9 for providing high quality digital broadcasts and
broadband IP access are presented.
Cable TV is based on FDM system and has originally played an important role
as a gap-filler for terrestrial broadcasting services. The digital
modulation format for digital video/IP packet is 64/256 QAM, which transmits
approximately 30/40 Mbps in a single 6 MHz channel. For expansion of the
downstream capacity, the feasibility study and field trial by using 1024 QAM
modem in commercial cable TV facility is demonstrated.
In typical cable TV, the transmission line is hybrid fiber and coaxial (HFC)
equipped with two-way communication paths, all kinds of Internet application
as well as digital broadcasts services can be provided by installation of
cablemodem and digital set-top box at the subscriber’s premises. The
consumer premises equipment for next generation will come to play the key
role of a "total information gateway" for each subscriber. The functional
requirements and possible architecture for the NGN set-top box, discussed
for draft recommendation in ITU-T Study Group 9, are introduced as well as
some other topics including home networking and interface issues.
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Speaker: Mitsuo NOHARA, IEEE802.16WG MMR-SG
Chair, KDDI
Title of Presentation: IEEE802.16/WiMAX Broadband Wireless Access
The “Broadband Wireless Access” technology is a key to provide the fast
internet access widely and globally in a rapid and economical manner, to the
customers not only fixed but also mobile. IEEE 802.16 Working Group on
Broadband Wireless Access Standards develops standards and recommended
practices to support the development and deployment of broadband Wireless
Metropolitan Area Networks which provides the customers the last mile
access, fast local connection to network.
Since its #1 meeting in July 1999, it has counted 41 sessions, consists of
307 engineer-members over 17 countries, and got their recent enhancement to
the current standard (well know as 802.16e) making the system mobile. It has
also actively communicated with international standardization bodies such as
ITU-T SG-15, ITU-R SG-8 and SG-9.
Meantime, the WiMAX Forum is an industry-led, non profit corporation formed
to promote and certify compatibility and interoperability of broadband
wireless products, based upon IEEE802.16 and ETSI HiperMAN standards. This
presentation covers the activities of IEEE802.16 and WiMAX, and the
technologies standardized. It also depicts some examples of developments and
field trials.
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Session 7: Data over Transport Networks (Ethernet/MPLS over Transport and
Enhanced Ethernet OAM) |
Speaker: Italo BUSI, Alcatel
Title of Presentation: Ethernet Services over Transport MPLS
Transport MPLS has been defined by ITU-T as an application of the MPLS
technology for packet transport networks.
Ethernet services have been defined by G.8111.x ITU-T Recommendation series
as well as by MEF Technical Specification irrespectively on the transport
network that is used to support those services.
Transport MPLS as a packet-based transport network technology is well suited
to support Ethernet services.
The paper describes how Transport MPLS networks can be used to implement
point-to-point EPL (Ethernet Private Line)/EVPL (Ethernet Virtual Private
Line), multipoint-to-multipoint EVPLAN (Ethernet Virtual Private LAN) and
rooted point-to-multipoint Services benefiting from the Transport MPLS of
being both a packet technology (i.e. better fitting the nature of packet
services like Ethernet) and being a transport technology (i.e. being a
carrier-grade technology supporting OAM and protection switching capabilites).
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Speaker: Paul BOTTORFF, Nortel
Title of Presentation: Highly Scalable Ethernets
The original Ethernet pioneered by Bob Metcalf in 1973 was limited to
operation over a local area. Continual advancements in Ethernet technology
over the last 30 years have transformed Ethernet into a high speed scalable
technology with almost limitless capacity. Today the IEEE 802.1 committee is
standardizing the latest Ethernet bridging innovations for Providers. Four
IEEE 802.1 standards projects 802.1ah, 802.1ad, 802.1aj, and 802.1ag provide
the base for building standards based Provider Ethernets with almost
limitless scaling. This presentation covers basic concepts of 802.1ah
network scaling including hierarchal and peer 802.1ah networks and
extensions for carrier transport.
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Speaker: Hiroshi OHTA, NTT
Title of Presentation: Ethernet OAM and Protection Switching
This presentation provides the latest standardization status on Ethernet
OAM and protection switching followed by some detailed explanation of the
mechanisms of each function. In order to realize "carrier class" Ethernet,
ITU-T SG13 developed Recommendation Y.1731 on Ethernet OAM mechanisms with
close collaboration with IEEE 802.1ag. This Recommendation was consented at
the last SG13 meeting in January 2006 and is under AAP now. This
Recommendation specifies fault management OAM functions as well as
performance management OAM functions. In order to enhance reliability of the
Ethernet, ITU-T SG15 developed Recommendation G.8031 on Ethernet protection
switching. It is planned to be consented at the SG15 meeting in February
2006. This Recommendation specifies 1+1/1:1 bidirectional protection
switching and 1+1 unidirectional protection switching.
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Speaker: Alan McGUIRE, BT (UK)
Title of Presentation: Next generation Ethernet network application
Next Generation Ethernet: Network Applications There is considerable
interest within the telecommunications industry in the development of new
Ethernet services. For many customers Ethernet is becoming the prsentation
of choice. What are the main challenges facing service providers? What are
the strengths and weaknesses of Ethernet? This talk examines these issues
and describes possible ways in which Ethernet may evolve to provide Next
Generation Ethernet solutions. |
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