JPH11506591A - Sdhネットワークにおける同期 - Google Patents
Sdhネットワークにおける同期Info
- Publication number
- JPH11506591A JPH11506591A JP9500210A JP50021097A JPH11506591A JP H11506591 A JPH11506591 A JP H11506591A JP 9500210 A JP9500210 A JP 9500210A JP 50021097 A JP50021097 A JP 50021097A JP H11506591 A JPH11506591 A JP H11506591A
- Authority
- JP
- Japan
- Prior art keywords
- node
- clock signal
- network
- signal
- 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
- 230000002457 bidirectional effect Effects 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 6
- 230000001360 synchronised effect Effects 0.000 description 11
- 238000010586 diagram Methods 0.000 description 10
- 230000003287 optical effect Effects 0.000 description 5
- 230000015556 catabolic process Effects 0.000 description 4
- 238000006731 degradation reaction Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
Classifications
-
- 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
- H04J3/0647—Synchronisation among TDM nodes
-
- 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
- H04J3/0679—Clock or time synchronisation in a network by determining clock distribution path in a network
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J2203/00—Aspects of optical multiplex systems other than those covered by H04J14/05 and H04J14/07
- H04J2203/0001—Provisions for broadband connections in integrated services digital network using frames of the Optical Transport Network [OTN] or using synchronous transfer mode [STM], e.g. SONET, SDH
- H04J2203/0028—Local loop
- H04J2203/0039—Topology
- H04J2203/0042—Ring
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J2203/00—Aspects of optical multiplex systems other than those covered by H04J14/05 and H04J14/07
- H04J2203/0001—Provisions for broadband connections in integrated services digital network using frames of the Optical Transport Network [OTN] or using synchronous transfer mode [STM], e.g. SONET, SDH
- H04J2203/0057—Operations, administration and maintenance [OAM]
- H04J2203/006—Fault tolerance and recovery
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J2203/00—Aspects of optical multiplex systems other than those covered by H04J14/05 and H04J14/07
- H04J2203/0001—Provisions for broadband connections in integrated services digital network using frames of the Optical Transport Network [OTN] or using synchronous transfer mode [STM], e.g. SONET, SDH
- H04J2203/0089—Multiplexing, e.g. coding, scrambling, SONET
-
- 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
Abstract
Description
Claims (1)
- 【特許請求の範囲】 1.両方向リンクによって相互接続された複数のノードを含み、外部クロック信 号が、同期のためにノードからノードへ上記クロック信号を通すように構成され ている上記ノードのうちの1つの入力に存在し、各ノードは、それぞれのノード を通過するクロック信号に、閉タイミングループの発生を防止するための手段の 一部としてそのノードを識別するデータをスタンプするように動作することを特 徴とするSDHネットワーク。 2.各ノードは、信号が通過した先行するノードから任意のノード識別データを 取り替えるように動作することを特徴とする請求の範囲第1項に記載のSDHネ ットワーク。 3.各ノードは、入りクロック信号が到着したノードのアイデンティティを読み 出すように動作し、かつクロック信号がその同じノードに戻されるべきである場 合には、クロック信号が同期のために使用されるべきではないと言うことを示す 信号を伝送するように動作することを特徴とする請求の範囲第2項に記載のSD Hネットワーク。 4.クロック信号が使用されるべきではないと言うことを示す信号をSSMBが 搬送することを特徴とする請求の範囲第3項に記載のSDHネットワーク。 5.上記SSMBのS1バイトが上記信号を搬送することを特徴とする請求の範 囲第4項に記載のSDHネットワーク。 6.各ノードは、クロック信号と共に伝送される、クロック信号が通過した複数 の先行するノードを識別するリストに、ノード識別データを追加するように動作 し、かつ上記リストがそれぞれのノードを識別するデータを含む場合には、同期 のためにクロック信号を使用しないように動作することを特徴とする請求の範囲 第1項に記載のSDHネットワーク。 7.各ノードは、クロック信号が通過したノードの数をカウントするように動作 し、かつこの数が予め定められた値を越える場合には、同期のためにクロック信 号を使用しないように動作することを特徴とする請求の範囲第6項に記載のSD Hネットワーク。 8.両方向リンクによって相互接続された複数のノードを含み、かつ外部クロッ ク信号を、同期目的のためにノードからノードへ通すように構成されているSD Hネットワーク内に閉タイミングループが発生することを防止する方法であって 、各ノードを通過するクロック信号にそのノードを識別するデータをスタンプす る段階を含むことを特徴とする方法。 9.図面の図4、図5及び図6を参照して実質的に記載されたSDH。 10.図面の図4、図5及び図6を参照して実質的に記載されたSDHネットワ ークに閉タイミングループが発生することを防止する方法。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9511426A GB2301991B (en) | 1995-06-06 | 1995-06-06 | SDH Network |
GB9511426.0 | 1995-06-06 | ||
PCT/GB1996/001300 WO1996039760A1 (en) | 1995-06-06 | 1996-05-31 | Synchronisation in an sdh network |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH11506591A true JPH11506591A (ja) | 1999-06-08 |
JP3814296B2 JP3814296B2 (ja) | 2006-08-23 |
Family
ID=10775600
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP50021097A Expired - Lifetime JP3814296B2 (ja) | 1995-06-06 | 1996-05-31 | Sdhネットワークにおける同期 |
Country Status (12)
Country | Link |
---|---|
US (1) | US6185216B1 (ja) |
EP (1) | EP0832524B1 (ja) |
JP (1) | JP3814296B2 (ja) |
CN (1) | CN1082288C (ja) |
AU (1) | AU710681B2 (ja) |
DE (1) | DE69617012T2 (ja) |
ES (1) | ES2166891T3 (ja) |
GB (1) | GB2301991B (ja) |
NO (1) | NO975609L (ja) |
RU (1) | RU2176434C2 (ja) |
UA (1) | UA45401C2 (ja) |
WO (1) | WO1996039760A1 (ja) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001168828A (ja) * | 1999-10-26 | 2001-06-22 | Marconi Communications Ltd | 通信システム |
JP2001203636A (ja) * | 1999-12-11 | 2001-07-27 | Alcatel | 同期式デジタル通信システム |
JP2005527227A (ja) * | 2002-05-29 | 2005-09-15 | リジェネロン・ファーマシューティカルズ・インコーポレイテッド | 誘導性の真核生物発現システム |
JP2015534380A (ja) * | 2012-09-28 | 2015-11-26 | ▲ホア▼▲ウェイ▼技術有限公司 | クロックを同期するための方法、システム、および装置 |
Families Citing this family (25)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FI104593B (fi) * | 1996-09-30 | 2000-02-29 | Nokia Networks Oy | Hierarkkinen synkronointimenetelmä |
FI104665B (fi) * | 1996-09-30 | 2000-04-14 | Nokia Networks Oy | Hierarkkinen synkronointimenetelmä |
FI103307B (fi) | 1997-02-11 | 1999-05-31 | Nokia Telecommunications Oy | Tietoliikenneverkon synkronointi |
GB9716195D0 (en) | 1997-07-31 | 1997-10-08 | Plessey Telecomm | MA alternate routeing |
JPH11122278A (ja) * | 1997-10-15 | 1999-04-30 | Nec Corp | 網同期ネットワークシステム及びこれに用いる送受信装置 |
DE19832440A1 (de) * | 1998-07-18 | 2000-01-20 | Alcatel Sa | Synchronisationsverfahren, primärer Referenztaktgenerator und Netzelement für ein synchrones digitales Nachrichtenübertragungsnetz |
GB2341749A (en) * | 1998-09-19 | 2000-03-22 | Nokia Telecommunications Oy | Digital network synchronisation |
JP3761732B2 (ja) * | 1999-01-19 | 2006-03-29 | 富士通株式会社 | ネットワーク同期制御装置 |
JP3485250B2 (ja) * | 1999-02-17 | 2004-01-13 | 富士通株式会社 | 従属同期装置及び該従属同期装置を有するsdh装置 |
JP3835945B2 (ja) * | 1999-02-19 | 2006-10-18 | 富士通株式会社 | ディジタルデータの伝送網におけるシステムクロック再生方法および装置 |
US6714563B1 (en) * | 1999-04-26 | 2004-03-30 | Cisco Technology, Inc. | Network clock synchronization scheme |
US6606362B1 (en) * | 1999-06-29 | 2003-08-12 | Nortel Networks Limited | Synchronization in a telecommunications network |
GB9930132D0 (en) | 1999-12-22 | 2000-02-09 | Ericsson Telefon Ab L M | Telecommunication network synchronisation |
DE10163480A1 (de) * | 2001-12-21 | 2003-07-17 | Siemens Ag | Taktsynchronisationsverfahren in einem Kommunikationsnetzwerk |
JP2005525169A (ja) * | 2002-05-10 | 2005-08-25 | コーディス・コーポレイション | 一定の構造フレームの上に一定の薄い壁部の管状の膜を有する医療装置を作成する方法 |
CN100369426C (zh) * | 2002-11-22 | 2008-02-13 | 中兴通讯股份有限公司 | 在同步数字传送网中判断时钟源成环的方法 |
GB2421671A (en) | 2004-12-22 | 2006-06-28 | Marconi Comm Gmbh | A node selects a source of timing information using network topology and the timing status of network nodes |
GB0428364D0 (en) * | 2004-12-24 | 2005-02-02 | Ibm | Identifying a processor in a multiprocessor system |
FR2903829B1 (fr) * | 2006-07-11 | 2008-08-22 | Alcatel Sa | Procede et dispositif de surveillance des chemins optiques de connexion pour un reseau optique transparent |
FR2903830B1 (fr) * | 2006-07-11 | 2008-08-22 | Alcatel Sa | Procede et dispositif de surveillance des chemins optiques de connexion pour un reseau optique transparent |
US8831435B2 (en) * | 2008-03-28 | 2014-09-09 | Centurylink Intellectual Property Llc | System and method for dual wavelength communications of a clock signal |
CN102368696B (zh) * | 2011-09-14 | 2014-07-30 | 杭州华三通信技术有限公司 | 一种选择同步时钟源的方法及装置 |
EP3396877A4 (en) * | 2016-01-19 | 2019-01-02 | Huawei Technologies Co., Ltd. | Clock packet transmission method and device |
EP3703241B1 (en) | 2019-02-26 | 2022-07-13 | Hitachi Energy Switzerland AG | Communication in a converter device |
CN114389734A (zh) * | 2020-10-21 | 2022-04-22 | 南京中兴新软件有限责任公司 | 时间同步的方法、第一节点、第二节点、网络 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4142069A (en) * | 1977-06-20 | 1979-02-27 | The United States Of America As Represented By The Secretary Of The Army | Time reference distribution technique |
JPH05211479A (ja) * | 1992-01-30 | 1993-08-20 | Fujitsu Ltd | 同一波長双方向伝送装置の光ループバック方法 |
US5355362A (en) * | 1992-10-26 | 1994-10-11 | Nec America, Inc. | Digital loop carrier system |
FI91689C (fi) * | 1992-11-09 | 1994-07-25 | Nokia Telecommunications Oy | Hierarkkinen synkronointimenetelmä sekä sanomapohjaista synkronointia käyttävä tietoliikennejärjestelmä |
JPH0795677A (ja) * | 1993-09-20 | 1995-04-07 | Fujitsu Ltd | シェルフ間の同期用情報と同期クロックの受渡し方法 |
US5473640A (en) * | 1994-01-21 | 1995-12-05 | At&T Corp. | Phase-lock loop initialized by a calibrated oscillator-control value |
-
1995
- 1995-06-06 GB GB9511426A patent/GB2301991B/en not_active Expired - Fee Related
-
1996
- 1996-05-31 DE DE69617012T patent/DE69617012T2/de not_active Expired - Lifetime
- 1996-05-31 RU RU98100102/09A patent/RU2176434C2/ru not_active IP Right Cessation
- 1996-05-31 AU AU58408/96A patent/AU710681B2/en not_active Ceased
- 1996-05-31 JP JP50021097A patent/JP3814296B2/ja not_active Expired - Lifetime
- 1996-05-31 UA UA97125836A patent/UA45401C2/uk unknown
- 1996-05-31 CN CN96194572A patent/CN1082288C/zh not_active Expired - Fee Related
- 1996-05-31 ES ES96919946T patent/ES2166891T3/es not_active Expired - Lifetime
- 1996-05-31 EP EP96919946A patent/EP0832524B1/en not_active Expired - Lifetime
- 1996-05-31 WO PCT/GB1996/001300 patent/WO1996039760A1/en active IP Right Grant
- 1996-05-31 US US08/973,182 patent/US6185216B1/en not_active Expired - Lifetime
-
1997
- 1997-12-04 NO NO975609A patent/NO975609L/no not_active Application Discontinuation
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001168828A (ja) * | 1999-10-26 | 2001-06-22 | Marconi Communications Ltd | 通信システム |
JP2001203636A (ja) * | 1999-12-11 | 2001-07-27 | Alcatel | 同期式デジタル通信システム |
JP2005527227A (ja) * | 2002-05-29 | 2005-09-15 | リジェネロン・ファーマシューティカルズ・インコーポレイテッド | 誘導性の真核生物発現システム |
JP2015534380A (ja) * | 2012-09-28 | 2015-11-26 | ▲ホア▼▲ウェイ▼技術有限公司 | クロックを同期するための方法、システム、および装置 |
US9641268B2 (en) | 2012-09-28 | 2017-05-02 | Huawei Technologies Co., Ltd. | Method, system and device for synchronizing clocks |
JP2017153125A (ja) * | 2012-09-28 | 2017-08-31 | ▲ホア▼▲ウェイ▼技術有限公司Huawei Technologies Co.,Ltd. | クロックを同期するための方法、システム、および装置 |
Also Published As
Publication number | Publication date |
---|---|
NO975609L (no) | 1998-02-06 |
WO1996039760A1 (en) | 1996-12-12 |
CN1082288C (zh) | 2002-04-03 |
CN1187272A (zh) | 1998-07-08 |
GB9511426D0 (en) | 1995-08-02 |
DE69617012D1 (de) | 2001-12-20 |
NO975609D0 (no) | 1997-12-04 |
US6185216B1 (en) | 2001-02-06 |
EP0832524A1 (en) | 1998-04-01 |
GB2301991B (en) | 1999-06-30 |
JP3814296B2 (ja) | 2006-08-23 |
DE69617012T2 (de) | 2002-06-06 |
UA45401C2 (uk) | 2002-04-15 |
AU710681B2 (en) | 1999-09-30 |
ES2166891T3 (es) | 2002-05-01 |
GB2301991A (en) | 1996-12-18 |
EP0832524B1 (en) | 2001-11-14 |
AU5840896A (en) | 1996-12-24 |
RU2176434C2 (ru) | 2001-11-27 |
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