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WO2002075972A1 - Procede et appareil de surveillance d'un reseau optique - Google Patents

Procede et appareil de surveillance d'un reseau optique Download PDF

Info

Publication number
WO2002075972A1
WO2002075972A1 PCT/US2002/006950 US0206950W WO02075972A1 WO 2002075972 A1 WO2002075972 A1 WO 2002075972A1 US 0206950 W US0206950 W US 0206950W WO 02075972 A1 WO02075972 A1 WO 02075972A1
Authority
WO
WIPO (PCT)
Prior art keywords
optical
optical signals
signals
electrical signals
wavelengths
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.)
Ceased
Application number
PCT/US2002/006950
Other languages
English (en)
Inventor
Nicolas William Spiridon
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Verizon Business Global LLC
Original Assignee
Worldcom Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Worldcom Inc filed Critical Worldcom Inc
Publication of WO2002075972A1 publication Critical patent/WO2002075972A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
    • H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
    • H04B10/077—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using a supervisory or additional signal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
    • H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
    • H04B10/079—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using measurements of the data signal
    • H04B10/0795—Performance monitoring; Measurement of transmission parameters
    • H04B10/07955—Monitoring or measuring power

Definitions

  • the present invention relates to network management and restoration, and is more
  • optical cables cany a significantly higher amount of information relative to
  • a fiber cable cut of an OC-192 link which has the capacity to
  • optical cross-connect at the demarcation point between service provider and customer. Also, the
  • POUs passive optical units
  • OMU optical unit
  • POUs passive optical units
  • photodiodes in turn, convert the received optical signals into their electrical equivalents.
  • electrical signals are transmitted to a processing unit, which analyzes the electrical signals to
  • optical signals is disclosed.
  • a plurality of optical splitters are configured to receive the plurality
  • Each of the plurality of optical signals has a different wavelength.
  • the method includes receiving the plurality of optical signals having a
  • the method also includes splitting the plurality of optical signals to output portions of the plurality of optical signals, and converting the portions of the plurality of optical
  • the method further includes transmitting the electrical signals to a
  • a system for monitoring a
  • An optical monitoring unit is configured to receive the plurality of optical signals.
  • the optical monitoring unit comprises a plurality of optical splitters that are
  • the optical monitoring unit also includes a plurality of photo
  • a processing unit is configured to analyze the electrical signals for an
  • sequences of one or more instructions for monitoring a plurality of optical signals is provided.
  • the one or more sequences of one or more instructions include instructions which, when
  • received electrical signals are converted from a plurality of optical signals having a different
  • Other steps include analyzing the electrical signals for an abnormal condition, and
  • an apparatus for monitoring a plurality
  • the apparatus includes means for receiving the plurality of optical signals
  • the apparatus includes means for
  • FIG. 1 is a diagram of a system for monitoring an optical network, in accordance Avith
  • FIG. 17 is a diagram of an optical monitoring unit (OMU), according to an embodiment
  • Figure 3 is a flow chart of a process of monitoring the optical network of Figure 2;
  • FIG. 4 is a flow chart of a provisioning process, in accordance with an embodiment of
  • FIGS 5A-5C are exemplary screens of the graphical user interface (GUI) to provision
  • Figure 6 is a diagi'am of a computer system that can perfo ⁇ n the operations according to
  • FIG. 1 shows a diagi'am of a system employing an optical monitoring unit (OMU),
  • OMU optical monitoring unit
  • An optical communication system 100 is configured according to an embodiment of the present invention.
  • An optical communication system 100 is configured to communicate according to an embodiment of the present invention.
  • Switch 101 utilizes a switch 101 that has connectivity to an optical cross-connect (OXC) 103.
  • OXC optical cross-connect
  • Optical cross-connect 103 For transmission to a terminating switch (not shown) of network 105.
  • Optical cross-connect 103
  • high-speed optical signals e.g., OC-3, OC-48, OC-192, etc.
  • Optical cross-connect 103 operates at the optical layer and does not require
  • system 100 supports any number of physical layer and higher layer protocols; for example,
  • SONET Synchronous Optical NETwork
  • SDH Synchronous Digital Hierarchy
  • ATM Synchronous Optical NETwork
  • Optical cross-connect 103 may operate using a number of different optical carriers of different
  • wavelengths, ⁇ , to ⁇ n and interfaces with an optical monitoring unit 107.
  • OMU 107 also may receive optical signals from various passive optical units (PO Is)
  • POUs 109 can be monitored.
  • OMU 107 may be deployed as an integral part of the POUs 109 so
  • POUs 109 may be an
  • OMU 107 converts the received optical signals from optical cross-connect 103 and POUs
  • Network 109 and transmits their electrical equivalent to a processing unit 111 over network 105.
  • Network 105
  • 105 may contain network elements (e.g., switches, internetworking devices, etc.) that operate at
  • Processing unit 11 1 analyzes the received electrical signals to determine the electrical and/or optical layers.
  • Processing unit 11 1 analyzes the received electrical signals to determine the electrical and/or optical layers.
  • switch 101 such as switch 101.
  • a network card in switch 101 is assumed to
  • processing unit 111 may generate an appropriate alarm signal to alert the switch 101.
  • the processing unit 111 may transmit the alarm to a network management system
  • OMU 107 may be used to monitor optical inputs
  • optical cross-connect 103 which may seive as the
  • This arrangement provides a
  • OMU 107 provides multiple
  • FIG. 2 shows a diagram of an OMU, according to an embodiment of the present
  • OMU 200 has a number of input ports 201, which in this example, totals m and
  • OMU 200 corresponds to the wavelengths, ⁇ , to ⁇ n , of the optical signals. As seen in the figure, OMU 200
  • optical splitters 203 and photo diodes 205 employs optical splitters 203 and photo diodes 205. The number of splitters 203 and photo
  • diodes 205 correspond to the number of input ports 201; accordingly, m number of splitters 203
  • each of the splitters 203a, 203b, 203c, 203d, and 203e permits
  • diodes 205a, 205b, 205c, 205d, and 205e which convert the light into equivalent electrical
  • the maintenance shelf 207 may then supply these electrical signals over a network 209 to
  • RMPU 211 may detect the interruption of
  • the presence of an electrical signal may represent the ON state
  • failure to receive an optical signal at the OMU 200 may cause the corresponding electrical signal
  • the Local Maintenance Shelf 207 and therefore, the associated electrical signals may be
  • RMPU 211 provides remote monitoring for the light wave inputs ( ⁇ , to ⁇ .) into OMU
  • Each optical input ( ⁇ ) will be associated with a particular port 201. If a problem (i.e., fault)
  • RMPU 211 can detect such an occurrence based on a
  • Database 213 which may be located locally or remotely from RMPU 211.
  • RMPU 211 may identify the port associated with that particular wavelength.
  • each wavelength can be associated with a
  • infonnation may also reside within database 213 and be utilized in the
  • the customer that has traffic associated with the particular wavelength may be identified
  • FIG. 3 shows a flowchart of the monitoring process performed in the system of Figure
  • step 301 optical signals are received
  • step 303 is diverted by splitters 203 to photo diodes 205.
  • step 303 is diverted by splitters 203 to photo diodes 205.
  • step 307 the converted electrical signals are transmitted to a remote processor (i.e., remote
  • RMPU 211 then analyzes the electrical signals for any
  • step 309 for example, the ON/OFF state transitions indicate problems with
  • step 311 RMPU 211
  • the alarm infonnation may send the alarm infonnation to a network management system or to the component that is the
  • the present invention can be employ to assist the provisioning of sendees, as
  • FIG. 4 shows a flow chart of the provisioning process, according to an embodiment of
  • the service provisioning is perfonned at an
  • the service representative selects a route that the customer seeks to
  • Figure 5A shows an exemplary provisioning screen 500
  • the provisioning screen 500 is configured to determine the amount of bandwidth between Los Angeles and New York City.
  • Route A and Route B are shown. Under this scenario, two routes, Route A and Route B, exist between LA 501 and LA 501 and LA 501 and LA 501 are shown. Under this scenario, two routes, Route A and Route B, exist between LA 501 and LA 501 are shown. Under this scenario, two routes, Route A and Route B, exist between LA 501 and LA 501 are shown. Under this scenario, two routes, Route A and Route B, exist between LA 501 and LA 501 and Route B.
  • Route A provides a direct link, while Route B traverses through Washington, D.C., as
  • Screen 500 provides a prompt 507, which permits the user to click on
  • buttons 509 and 511 to select either Route A or Route B, respectively.
  • step 403 the capacity along the selected route is examined to determine whether
  • step 405) then the customer is assigned the desired capacity; i.e., an wavelength, ⁇ , is attributed
  • Figure 5B shows a screen 521 that indicates to the service
  • Box 523 may specify any other infonnation with respect to the selected route; for example, if the OMU 107
  • a prompt 525 is displayed, which requests the customer identification
  • the customer ID may be entered using entry box 527. Upon entry of this information,
  • Figure 6 shows a diagram of a computer system that can perform the functions of the
  • Computer system 601 includes a bus 603 or other
  • Computer system 601 also includes a main memory 607,
  • RAM random access memory
  • dynamic storage device such as a random access memory (RAM) or other dynamic storage device, coupled to bus 603 for
  • main memory 605 storing information and instructions to be executed by processor 605.
  • main memory 605 main memory
  • 607 may be used for storing temporary variables or other intermediate information during
  • Computer system 601 furthermore, executes instructions to be executed by processor 605.
  • Computer system 601 furthermore, executes instructions to be executed by processor 605.
  • ROM read only memory
  • static storage device coupled to bus 603 for
  • a storage device 611 such as a
  • magnetic disk or optical disk is provided and coupled to bus 603 for storing information and
  • Computer system 601 may be coupled via bus 603 to a display 613, such as a cathode ray
  • An input device 615 is coupled to bus 603 for communicating information and
  • cursor control 617 Another type of user input device is cursor control 617,
  • the detection of network faults is provided by computer
  • system 601 in response to processor 605 executing one or more sequences of one or more
  • main memory 607 causes processor 605 to perform the
  • One or more processors in a multi-processing arrangement may
  • hard-wired circuitry may be used in place of or in combination with
  • Such a medium may take many forms, including but not limited to, non- volatile
  • Non- volatile media includes, for example,
  • Volatile media includes dynamic memory
  • Transmission media includes coaxial cables, copper wire and fiber
  • Transmission media can also take the form of acoustic or light waves, such as those generated during radio wave and infrared data
  • Computer-readable media include, for example, a floppy disk, a
  • optical medium punch cards, paper tape, any other physical medium with patterns of holes, a
  • RAM random access memory
  • PROM read-only memory
  • EPROM erasable programmable read-only memory
  • FLASH-EPROM any other memory chip or cartridge, a carrier
  • instructions may initially be carried on a magnetic disk of a remote computer.
  • the remote computer may initially be carried on a magnetic disk of a remote computer.
  • a modem local to computer system 601 can receive the data on the telephone line and
  • bus 603 can receive the data carried in the infrared signal and place the data on bus 603.
  • Bus 603 can receive the data carried in the infrared signal and place the data on bus 603.
  • 603 carries the data to main memory 607, from which processor 605 retrieves and executes the
  • main memory 607 may optionally be stored on storage
  • Computer system 601 also includes a communication interface 619 coupled to bus 603.
  • Communication interface 619 provides a two-way data communication coupling to a network
  • link 621 that is connected to a local network 623.
  • communication interface 619 For example, communication interface 619
  • LAN packet switched local area network
  • communication interface 619 may be an asymmetrical digital subscriber line (ADSL) card, an integrated services digital network (ISDN) card or a modem to provide a data
  • ADSL asymmetrical digital subscriber line
  • ISDN integrated services digital network
  • Wireless links may also be
  • communication interface 619 sends and receives
  • Network link 621 typically provides data communication through one or more networks
  • network link 621 may provide a connection through local
  • IP Internet Protocol
  • LAN 623 and IP network 627 both use electrical, electromagnetic or optical signals
  • network link 621 and through communication interface 619, which carry the digital data to and
  • Computer system 601 can transmit notifications and receive data, including program code,
  • An optical monitoring unit utilizes optical splitters that receive
  • optical signals via coiresponding input ports, wherein each of the optical signals has a different
  • the optical monitoring unit also contains photo diodes that are coupled
  • the photo diodes receive a portion of each of the optical components
  • a processing unit which may be located
  • This arrangement advantageously permits a seivice provider to rapidly respond to

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Optical Communication System (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

L'invention porte sur une manière de surveiller plusieurs signaux optiques. A cet effet une unité de surveillance (200) comportant plusieurs séparateurs optiques (203) reçoit plusieurs signaux optiques présentant chacun une longueur d'onde différente. Ladite unité de surveillance comporte également plusieurs photodiodes (205) respectivement couplées aux séparateurs optiques et configurées pour recevoir une partie de chacun des signaux optiques. Les parties de signaux optiques sont converties en signaux électriques. Une unité de traitement (211) est configuré pour analyser les signaux électriques pour y détecter des états anormaux.
PCT/US2002/006950 2001-03-16 2002-03-07 Procede et appareil de surveillance d'un reseau optique Ceased WO2002075972A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US81072101A 2001-03-16 2001-03-16
US09/810,721 2001-03-16

Publications (1)

Publication Number Publication Date
WO2002075972A1 true WO2002075972A1 (fr) 2002-09-26

Family

ID=25204528

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2002/006950 Ceased WO2002075972A1 (fr) 2001-03-16 2002-03-07 Procede et appareil de surveillance d'un reseau optique

Country Status (1)

Country Link
WO (1) WO2002075972A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140006961A1 (en) * 2012-06-29 2014-01-02 Infinera Corporation Digital link viewer
EP3917034A1 (fr) * 2020-05-27 2021-12-01 Telia Company AB Moniteur de fibre optique
CN116659565A (zh) * 2023-05-12 2023-08-29 武汉光迅科技股份有限公司 一种监测方法、装置、设备及存储介质

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5513029A (en) * 1994-06-16 1996-04-30 Northern Telecom Limited Method and apparatus for monitoring performance of optical transmission systems
US5943147A (en) * 1994-11-25 1999-08-24 Pirelli Cavi S.P.A. Telecommunication system and method for wavelength-division multiplexing transmissions with a controlled separation of the outgoing channels and capable of determining the optical signal/noise ratio
US5949560A (en) * 1997-02-05 1999-09-07 Northern Telecom Limited Optical transmission system
US5986782A (en) * 1997-05-29 1999-11-16 Ciena Corporation Signal-to-noise monitoring in WDM optical communication systems
US6178025B1 (en) * 1997-12-03 2001-01-23 Nortel Networks Limited Optical network loss-of-signal detection
US6341024B1 (en) * 1997-12-30 2002-01-22 Lg. Philips Lcd Co., Ltd. Channel monitoring apparatus in a wavelength division multiplexing system

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5513029A (en) * 1994-06-16 1996-04-30 Northern Telecom Limited Method and apparatus for monitoring performance of optical transmission systems
US5943147A (en) * 1994-11-25 1999-08-24 Pirelli Cavi S.P.A. Telecommunication system and method for wavelength-division multiplexing transmissions with a controlled separation of the outgoing channels and capable of determining the optical signal/noise ratio
US5949560A (en) * 1997-02-05 1999-09-07 Northern Telecom Limited Optical transmission system
US5986782A (en) * 1997-05-29 1999-11-16 Ciena Corporation Signal-to-noise monitoring in WDM optical communication systems
US6178025B1 (en) * 1997-12-03 2001-01-23 Nortel Networks Limited Optical network loss-of-signal detection
US6341024B1 (en) * 1997-12-30 2002-01-22 Lg. Philips Lcd Co., Ltd. Channel monitoring apparatus in a wavelength division multiplexing system

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140006961A1 (en) * 2012-06-29 2014-01-02 Infinera Corporation Digital link viewer
US9377921B2 (en) * 2012-06-29 2016-06-28 Infinera Corporation Digital link viewer
EP3917034A1 (fr) * 2020-05-27 2021-12-01 Telia Company AB Moniteur de fibre optique
US11658740B2 (en) 2020-05-27 2023-05-23 Telia Company Ab Monitor of optical fiber
CN116659565A (zh) * 2023-05-12 2023-08-29 武汉光迅科技股份有限公司 一种监测方法、装置、设备及存储介质

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