International Telecommunication Union   ITU
 
 
Site Map Contact us Print Version
 Friday, March 03, 2006

Study Group 15 saw continued progress in its work on standards to support the end-to-end rollout of Ethernet and Multiprotocol Label Switching (MPLS). This work continues the evolution of the use of Ethernet as an enterprise technology into a carrier service, and supports MPLS from a wider network perspective.

Study group experts say that ITU is the only standards body looking to support the choice of either Ethernet or MPLS as an end-to-end network technology. In effect ITU is addressing both technologies as part of one packet transport network, focusing in addition on their seamless interoperability.

Work in the Ethernet field progressed at the February meeting aims to allow per user, service provider, and network operator service level monitoring and assurance; fault isolation to target maintenance and repair and to enable automatic protection switching, network management and the possibility of reuse of SDH management systems.

This work is based on, and enabled by the work recently completed on Ethernet operations, administration and maintenance (OAM) in Study Group 13 with their consent of new Recommendation Y.1731 (see story). The follow-on work in SG 15 includes amendments to the layer network architecture (G.8010/Y.1306) and the Ethernet equipment Recommendations (G.8021/Y.1341), and a new Recommendation on Ethernet protection switching (G.8031/Y.1342), which according to Study Group experts will give operators the opportunity to offer close to 100 per cent availability of Ethernet services for the first time. This is achieved using a system that uses a predefined alternative route if the most direct is broken.

In the field of MPLS a raft of new work aims to allow operators to adopt this technology end-to-end. MPLS is widely embraced in backbone networks as a way to speed up routers. Lately some have advocated its use further downstream in access networks, there have even been suggestions to extend this as far as customer premises. ITU’s work seeks to support this, but additionally to allow the seamless interworking between Ethernet and MPLS. This has been progressed in SG 15 through the completion of a new set of Recommendations for Transport MPLS (T-MPLS), a technology which uses a subset of the components defined in the MPLS Layer Network Architecture of Recommendation G.8110 to support packet transport applications that adhere to ITU-T layer network architecture principles. A T-MPLS layer network can operate independently of its clients and its associated control networks (i.e., multi-carrier or single carrier networks (MCN, SCN) and can carry a variety of client traffic types. This independence affords network operators the freedom necessary to design robust packet transport networks for their own use and to transport customer traffic. T-MPLS is designed to behave consistently with existing transport technologies, thus offering the operational characteristics, performance and reliability that network operators require from carrier-class technologies. The new Recommendations for this technology cover the T-MPLS layer network architecture (G.8110.1/Y.1370.1), interfaces for the T-MPLS Hierarchy (G.8112/Y.1371), and T-MPLS Equipment (G.8121/Y.1381).

 

Friday, March 03, 2006 12:21:50 PM (W. Europe Standard Time, UTC+01:00)  #     | 
 Thursday, March 02, 2006

ITU-T together with the US Alliance for Telecommunications Industry Solutions (ATIS) is holding a free workshop Next Generation Network Technology and Standardization at the Mandalay Bay Convention Centre in Las Vegas, USA, 19-20 March 2006 during the TelecomNEXT event.

This workshop will: 

  • Examine the status of NGN standards 
  • Identify standards work needed to support ongoing viable businesses for all parties as NGN becomes reality, and 
  • Enhance and extend standardization community cooperation to further coordinate NGN work

A particular emphasis of the event will be next generation network (NGN) requirements and standards objectives from a North American perspective and how these can be best taken into account in global NGN standardization by the ITU-T.

Register here. ITU’s convening letter
here.

 

Thursday, March 02, 2006 11:43:34 AM (W. Europe Standard Time, UTC+01:00)  #     | 

The Director of ITU's Telecommunication Standardization Bureau (TSB), Houlin Zhao, has convened a meeting 4-5 April 2006 in Geneva to explore standardization in Internet Protocol Television (IPTV).

IPTV rollout is expected to grow at a brisk pace in the coming years. 

Many of the world's major telecommunications providers are exploring IPTV as a new service. It is increasingly seen by operators as an important part of a triple play package of voice, video and data services. Standardization is key if service providers are to offer good quality, and provide the value-adds such as video on demand services which will inevitably drive the market. 

Zhao is convinced that standardization in the field is an urgent need. “IPTV is becoming an increasingly important service in the market, and more and more ITU-T Members have said that they are facing challenges from technical as well as regulatory issues,” said Zhao. “We have received a number of proposals to strengthen our work on IPTV standardization in order to meet the needs of market players and users. I encourage ITU members and ITU partners to provide contributions and to participate at the meeting. I am confident that this will be a very productive and successful meeting.”

The meeting will examine; the situation and challenges of IPTV service at the national level; the situation and challenges of IPTV service at the regional/global levels; the actions and development of IPTV-related service by SDOs; technical and regulatory challenges and the ITU’s role and expected actions in IPTV standardization.

More and online registration here.

Thursday, March 02, 2006 11:41:33 AM (W. Europe Standard Time, UTC+01:00)  #     | 
 Wednesday, March 01, 2006

AAP Announcement UPDATE NOTIFICATION

The following files relative to AAP have been updated since 2006-02-28

Group : aap
updated :          2006-02-28 17:39:29      
title :          [031] AAP Announcement No. 31, 1 March 2006, (SG 4, 12, 13, 15)
url :          http://www.itu.int/itudoc/itu-t/aap/announce/05-08/031.html
-------------------------------------------------------------
 
Note : This is an automatic message for ITU-T/TSB Alternative Approval Process

 - For further questions, please contact TSB EDH at tsbedh@itu.int
 - For documentation, go to http://www.itu.int/ITU-T/aap/index.html
 - Comments on Recommendations under AAP should be submitted by filling the appropriate forms in each Study Group AAP web page and sent to the relevant Study Group email address

More on AAP 

Wednesday, March 01, 2006 10:02:13 AM (W. Europe Standard Time, UTC+01:00)  #     | 

ITU-T Workshop on "Telecommunication Management and Operations Support System"
Beijing, China, 22-23 May 2006

An ITU-T workshop on Telecommunication Management and Operations Support System will take place at the XinYuan Hotel in Beijing, China, from 22 to 23 May 2006 inclusive, at the kind invitation of Beijing University of Posts and Telecommunications (BUPT). The workshop will be held prior to ITU-T Study Group 4 meeting which will be held at the same venue from 24 May to 2 June 2006 inclusive.

As the lead Study Group on telecommunication management, ITU-T Study Group 4 is responsible for studies regarding the management of telecommunication services, networks, and equipment, including support for next generation networks (NGN) and the application and evolution of the telecommunication management network (TMN) framework. Additionally, it is responsible for other telecommunication management studies relating to designations, transport-related operations procedures, and test and measurement techniques and instrumentation.

More details

ITU-T Workshops and Seminars

Wednesday, March 01, 2006 9:56:56 AM (W. Europe Standard Time, UTC+01:00)  #     | 
 Tuesday, February 28, 2006

Joint ITU-T Workshop and IMTC Forum 2006 on "H.323, SIP: is H.325 next?"
San Diego, California, USA, 9-11 May 2006

The rollout of NGN will bring with it in a new era of multimedia communications and with that a need to consider updating or replace the currently used H.323 and SIP multimedia protocols.

The question is whether to pursue development of a new protocol and a new generation of multimedia communication systems, or define new multimedia capabilities and functionality for existing protocols. Perhaps some consideration needs to be given to service control interface specifications. With work already underway in ITU on a new protocol dubbed H.325, the industry must decide whether to invest more time and resource into this pursuit.

More details 

ITU-T Workshops and Seminars

 

Tuesday, February 28, 2006 3:55:28 PM (W. Europe Standard Time, UTC+01:00)  #     | 
 Monday, February 27, 2006

A revision to a commonly used ITU-T Recommendation will extend use of fibre previously used mainly in core networks to metropolitan or regional networks. Crucially it also has the potential to greatly reduce operating costs for network providers.

G.655 for non-zero dispersion-shifted fibre (NZDSF) was originally designed to support DWDM long distance core, it was designed to reduce a phenomenon called four wave mixing (an interaction between wavelengths that generates additional optical channels). The impressive improvement in dispersion profiles afforded by G.655 fibre together with the development of the G.692 standard for optical interfaces for multichannel systems with optical amplifiers led to an explosion in the market for DWDM systems experts say.

Reduced dispersion allows sending signals over greater distances without dispersion compensation, meaning that operators will be able to avoid using a compensator and amplifier as well as the costs associated with this; power, protection, housing and security.

The revision to G.655 (full title, Characteristics of a non-zero dispersion-shifted single-mode optical fibre and cable) deals with chromatic dispersion, a phenomenon which at low levels counteracts distortion, but at high-levels can make a signal unusable. The management of chromatic dispersion is crucial as the number of wavelengths used in WDM systems increases. ITU has a history of providing the specifications that allow operators to most efficiently handle this. The revision allows more efficient use of the properties of chromatic dispersion by more stringently defining its existence. It defines chromatic dispersion in two new categories that can be exploited by systems designers as necessary.

The need for the work stemmed from systems' designers want to better understand dispersion. And a result is that experts saw a use for G.655 cable in metro or regional networks where it had previously only been used in core networks.

 

Monday, February 27, 2006 5:16:39 PM (W. Europe Standard Time, UTC+01:00)  #     |