JP2002506591A - Vdslシステムにおけるノードの同期をとるための装置 - Google Patents
Vdslシステムにおけるノードの同期をとるための装置Info
- Publication number
- JP2002506591A JP2002506591A JP50548399A JP50548399A JP2002506591A JP 2002506591 A JP2002506591 A JP 2002506591A JP 50548399 A JP50548399 A JP 50548399A JP 50548399 A JP50548399 A JP 50548399A JP 2002506591 A JP2002506591 A JP 2002506591A
- Authority
- JP
- Japan
- Prior art keywords
- vdsl
- node
- receiver
- nodes
- synchronization
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/0035—User-machine interface; Control console
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/02—Details
- H04J3/06—Synchronising arrangements
- H04J3/0635—Clock or time synchronisation in a network
- H04J3/0638—Clock or time synchronisation among nodes; Internode synchronisation
- H04J3/0644—External master-clock
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Multimedia (AREA)
- Computer Networks & Wireless Communication (AREA)
- Synchronisation In Digital Transmission Systems (AREA)
- Position Fixing By Use Of Radio Waves (AREA)
- Optical Communication System (AREA)
Abstract
Description
Claims (1)
- 【特許請求の範囲】 1.ローカル局(1)と加入者(3)との間に配置されたVDSLノード(2) を含み、前記ノードは、地点(A)に対する独立な接続(4)と地点(A)から 加入者(3)に至る共通のアクセス接続(5)とを有するVDSLシステムにお いて、前記ノードの同期をとるための装置において、 前記ノード(2)は、共通の外部時間規準(7)に対して同期 をとられることを特徴とする装置。 2.前記ノード(2)は、それぞれ、同期信号に対する受信器(6)と、安定な クロック信号を発生するための高い安定性を備えた内部発振器と、を有している ことを特徴とする請求項1に記載の装置。 3.前記内部発振器は、ルビジウム発振器からなっていることを特徴とする請求 項2に記載の装置。 4.前記受信器(6)は、サテライト受信器からなっていることを特徴とする請 求項2または請求項3に記載の装置。 5.前記サテライト受信器は、多数のサテライト(7)から信号を受信し、同期 信号を時間および周波数に対して平均化するように調整されていることを特徴と する請求項4に記載の装置。 6.前記クロック信号は、前記ノードのそれぞれによってサンプリング信号とし て使用されることを特徴とする請求項1〜請求項5のいずれかに記載の装置。 7.前記受信器(6)は、GPS受信器からなっていることを特徴とする請求項 2〜請求項6のいずれかに記載の装置。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE9702481-4 | 1997-06-26 | ||
SE9702481A SE9702481L (sv) | 1997-06-26 | 1997-06-26 | Arrangemang för synkronisering av noder i VDSL-system |
PCT/SE1998/001115 WO1999000928A2 (en) | 1997-06-26 | 1998-06-10 | Arrangement for synchronization of nodes in vdsl-systems |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2002506591A true JP2002506591A (ja) | 2002-02-26 |
JP4102892B2 JP4102892B2 (ja) | 2008-06-18 |
Family
ID=20407553
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP50548399A Expired - Lifetime JP4102892B2 (ja) | 1997-06-26 | 1998-06-10 | Vdslシステムにおけるノードの同期をとるための装置 |
Country Status (8)
Country | Link |
---|---|
US (1) | US6731707B1 (ja) |
EP (1) | EP0992138B1 (ja) |
JP (1) | JP4102892B2 (ja) |
DE (1) | DE69807486D1 (ja) |
EE (1) | EE9900609A (ja) |
NO (1) | NO996420L (ja) |
SE (1) | SE9702481L (ja) |
WO (1) | WO1999000928A2 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH11220439A (ja) * | 1998-01-30 | 1999-08-10 | Fujikura Ltd | 光ファイバ通信回線の同期切替方式 |
JP2006525740A (ja) * | 2003-05-07 | 2006-11-09 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | 通信システム |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1164730B1 (en) | 2000-06-16 | 2006-11-15 | Alcatel | Method to transport a reference clock signal |
GB2373400B (en) * | 2001-01-17 | 2003-04-09 | Marconi Comm Ltd | Real time clocks in communications networks |
US7738611B2 (en) * | 2006-08-07 | 2010-06-15 | Harris Stratex Networks, Inc. | Remote monitoring and calibration of system reference clock using network timing reference |
CN101848193B (zh) * | 2009-03-27 | 2013-11-06 | 华为技术有限公司 | 网络同步的方法、系统和网络节点 |
US8804748B2 (en) * | 2011-03-31 | 2014-08-12 | Nokia Siemens Networks Ethernet Solutions Ltd. | Hitless node insertion for Ethernet networks |
EP2690805B1 (en) | 2012-07-23 | 2020-05-27 | Lantiq Beteiligungs-GmbH & Co.KG | Spectrum management and timing optimization over multiple distribution points |
FI20135112L (fi) * | 2013-02-05 | 2014-08-06 | Tellabs Oy | Satelliittivastaanotinmoduuli tietoliikennelaitteistoa varten |
US9276678B1 (en) * | 2014-07-23 | 2016-03-01 | Google Inc. | Scalable multi-source GPS signal distribution network |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5245634A (en) * | 1992-03-23 | 1993-09-14 | Motorola, Inc. | Base-site synchronization in a communication system |
US5666330A (en) * | 1994-07-21 | 1997-09-09 | Telecom Solutions, Inc. | Disciplined time scale generator for primary reference clocks |
US5727034A (en) * | 1995-07-26 | 1998-03-10 | Nokia Telecommunications Oy | Apparatus and method for synchronizing base sites individually in a communication system |
FI103307B (fi) * | 1997-02-11 | 1999-05-31 | Nokia Telecommunications Oy | Tietoliikenneverkon synkronointi |
US6373834B1 (en) * | 1997-12-19 | 2002-04-16 | Telefonaktiebolaget Lm Ericsson | Synchronization for cellular telecommunications network |
-
1997
- 1997-06-26 SE SE9702481A patent/SE9702481L/ not_active IP Right Cessation
-
1998
- 1998-06-10 US US09/446,120 patent/US6731707B1/en not_active Expired - Lifetime
- 1998-06-10 DE DE69807486T patent/DE69807486D1/de not_active Expired - Lifetime
- 1998-06-10 EE EEP199900609A patent/EE9900609A/xx unknown
- 1998-06-10 JP JP50548399A patent/JP4102892B2/ja not_active Expired - Lifetime
- 1998-06-10 WO PCT/SE1998/001115 patent/WO1999000928A2/en active IP Right Grant
- 1998-06-10 EP EP98929976A patent/EP0992138B1/en not_active Expired - Lifetime
-
1999
- 1999-12-23 NO NO996420A patent/NO996420L/no unknown
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH11220439A (ja) * | 1998-01-30 | 1999-08-10 | Fujikura Ltd | 光ファイバ通信回線の同期切替方式 |
JP2006525740A (ja) * | 2003-05-07 | 2006-11-09 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | 通信システム |
Also Published As
Publication number | Publication date |
---|---|
DE69807486D1 (de) | 2002-10-02 |
SE508460C2 (sv) | 1998-10-05 |
EP0992138A2 (en) | 2000-04-12 |
SE9702481D0 (sv) | 1997-06-26 |
SE9702481L (sv) | 1998-10-05 |
US6731707B1 (en) | 2004-05-04 |
EP0992138B1 (en) | 2002-08-28 |
EE9900609A (et) | 2000-08-15 |
WO1999000928A2 (en) | 1999-01-07 |
NO996420D0 (no) | 1999-12-23 |
NO996420L (no) | 2000-02-24 |
WO1999000928A3 (en) | 1999-03-25 |
JP4102892B2 (ja) | 2008-06-18 |
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