WO2006080051A1 - Procede de gestion de longueurs d'ondes dans un reseau optique, station terminale et station centrale - Google Patents

Procede de gestion de longueurs d'ondes dans un reseau optique, station terminale et station centrale Download PDF

Info

Publication number
WO2006080051A1
WO2006080051A1 PCT/JP2005/000950 JP2005000950W WO2006080051A1 WO 2006080051 A1 WO2006080051 A1 WO 2006080051A1 JP 2005000950 W JP2005000950 W JP 2005000950W WO 2006080051 A1 WO2006080051 A1 WO 2006080051A1
Authority
WO
WIPO (PCT)
Prior art keywords
wavelength
optical network
occupation
station
client signal
Prior art date
Application number
PCT/JP2005/000950
Other languages
English (en)
Japanese (ja)
Inventor
Toshihisa Kyouno
Original Assignee
Fujitsu Limited
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 Fujitsu Limited filed Critical Fujitsu Limited
Priority to PCT/JP2005/000950 priority Critical patent/WO2006080051A1/fr
Publication of WO2006080051A1 publication Critical patent/WO2006080051A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0227—Operation, administration, maintenance or provisioning [OAMP] of WDM networks, e.g. media access, routing or wavelength allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0227—Operation, administration, maintenance or provisioning [OAMP] of WDM networks, e.g. media access, routing or wavelength allocation
    • H04J14/0241—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths
    • H04J14/0242—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths in WDM-PON
    • H04J14/0245—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths in WDM-PON for downstream transmission, e.g. optical line terminal [OLT] to ONU
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0227—Operation, administration, maintenance or provisioning [OAMP] of WDM networks, e.g. media access, routing or wavelength allocation
    • H04J14/0241—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths
    • H04J14/0242—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths in WDM-PON
    • H04J14/0249—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths in WDM-PON for upstream transmission, e.g. ONU-to-OLT or ONU-to-ONU
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0278—WDM optical network architectures
    • H04J14/0279—WDM point-to-point architectures

Definitions

  • the present invention relates to an optical network wavelength management method, a terminal station, and a center station, and relates to an optical network wavelength management method and a terminal station that perform communication by wavelength division multiplexing by connecting a plurality of terminal stations and a center station with optical fibers. And the center station.
  • Patent Document 1 when communication occurs, the control station is informed of the fact to the master station, and the master station selects an unused wavelength and transmits it to the calling side and the called side, thereby enabling communication. Is described.
  • Patent Document 2 when a communication occurs, a line monitoring node detects an unused wavelength, outputs an unused signal using the wavelength, and a local node that desires transmission detects an unused signal. It is described that communication is possible by outputting a signal requesting establishment of communication at an unused wavelength.
  • Patent Document 3 describes that when communication occurs, one or a plurality of unused wavelengths are reserved, and a minimum number of unused wavelengths is selected from the reserved wavelengths that are duplicated by negotiation. .
  • Patent Document 1 Japanese Patent Laid-Open No. 1-160298
  • Patent Document 2 JP-A-9-83491
  • Patent Document 3 Japanese Patent Application Laid-Open No. 2003-318952
  • the present invention has been made in view of the above points, and it is possible to effectively use the wavelength, and to reduce the increase in cost with respect to the amount of communication traffic.
  • the overall purpose is to provide a center station.
  • the present invention relates to a wavelength management method for an optical network in which a plurality of terminal stations and a center station are connected by optical fibers and communication is performed by wavelength division multiplexing.
  • Wavelength occupancy inquiry information that monitors the usage of wavelengths in the optical network and inquires about the occupancy of unused wavelengths in the optical network when an external client signal is input is transmitted to the center station by the unused wavelengths.
  • the center station monitors the wavelength usage status in the optical network, and if the wavelength inquired by the wavelength occupation inquiry information is operable, the selection to permit the occupation of the unused wavelength is permitted.
  • a wavelength occupation permission notification is transmitted to the terminal station by the unused wavelength, and the terminal station occupies the wavelength permitted by the selected wavelength occupation permission notification and transmits the external client.
  • the client station communicates the client signal in the optical network, and when the center station detects the end of communication of the client signal, it transmits a selective wavelength release notification to the terminal station.
  • the wavelength occupation in the optical network is canceled when the selective wavelength cancellation notification is received
  • FIG. 1 is a block diagram of an embodiment of an optical network system to which an optical network wavelength management method of the present invention is applied.
  • FIG. 2 is a flowchart of the wavelength selection operation of the terminal station.
  • FIG. 3 is a flowchart of wavelength selection operation of the master station.
  • FIG. 4 is a flowchart of wavelength selection cancellation operation of the terminal station.
  • FIG. 5 is a flowchart of wavelength selection cancellation operation of the master station.
  • FIG.6 Wavelength selection and cancellation sequence between terminal station and master station.
  • FIG. 1 shows a block diagram of an embodiment of an optical network system to which an optical network wavelength management method of the present invention is applied.
  • the optical network system is configured by connecting a single master station 10 and a plurality of terminal stations 20 with optical fibers 30 and 31.
  • a configuration may be adopted in which the downstream wavelength band and the upstream wavelength band are separated, and the downstream optical fiber 30 and the upstream optical fiber 31 are combined into one optical fiber.
  • the master station 10 includes an E / O unit 111 that performs electrical Z-optical conversion, a 2-input 1-output optical switch 2: 1 optical 3 unit 112, a wavelength conversion unit 1 13 that converts the wavelength of an optical signal, OZE unit 114 that performs optical Z electrical conversion, light power unit 115 that splits the optical signal, input control unit 11 provided in parallel with N circuits, WDM multiplexing unit 12 that performs wavelength multiplexing, and arbitration unit 13 , A variable wavelength filter unit 141 that varies the pass wavelength, a control termination unit 14 that includes the ⁇ / E unit 142, a variable wavelength filter unit 151 that varies the pass wavelength, a wavelength conversion unit 152, and a PD (photodiode) that outputs an optical signal. From the output control unit 15 provided in parallel with the N circuit, the optical power plastic unit 16, and the N input 4 output optical switch N: 4 light SW unit 17 Made up
  • the terminal station 20 is an E / O unit 211 that performs electrical / optical conversion, a 2-input 1-output optical switch 2
  • FIG. 2 shows a flowchart of the wavelength selection operation of the terminal station.
  • the wavelength monitoring unit 23 monitors all WDM signals on the optical fiber 30 in step S 10 and notifies the control signal termination unit 22 of the presence or absence of each of the wavelengths ⁇ 1-;
  • the input control unit 21 determines whether or not a client signal is input in step S11. If there is a client signal input, the process proceeds to step S12.
  • the control signal termination unit 22 determines the unused wavelength (for example, ⁇ 2) from the unused wavelength recognized in step S12; 1 2 and 4 and selects it as the variable wavelength filter unit 231 in step S13. Wavelength Control to fix to ⁇ 2, control to output the wavelength ⁇ 2 to the wavelength conversion unit 213, and control to select the output of the ⁇ / ⁇ unit 211 to the 2: 1 light SW 212. In step S14, the control signal termination unit 22 notifies the master station 10 of the wavelength occupation inquiry information (occupation inquiry and selection of the selected wavelength ⁇ 2) including the terminal identification ID of the own device.
  • the wavelength occupation inquiry information occupation inquiry and selection of the selected wavelength ⁇ 2
  • step S15 the control signal termination unit 22 determines whether or not the response from the master station 10 has timed out, and returns to step S12 when the response 'timeout is detected. Proceed to S16.
  • step S16 the control signal termination unit 22 receives the selected wavelength occupancy permission notification addressed to its own device from the master station 10 through the wavelength ⁇ 2 and passes the variable wavelength filter unit 241 through the wavelength ⁇ 2 in step S17.
  • the operation of the eaves / outlet section 211 is stopped, and communication using the selected wavelength ⁇ 2 is started.
  • FIG. 3 shows a flowchart of the wavelength selection operation of the master station.
  • the control termination unit 14 monitors the free wavelengths ⁇ 2 and 4 recognized by the arbitration unit 13, and proceeds to step S21 when the free wavelength ⁇ 2 changes from unused to used.
  • the arbitration unit 13 controls the variable wavelength filter 141 to fix the selected wavelength to ⁇ 2 in step S 21, and terminates the wavelength occupation inquiry information in the arbitration unit 13 in step S 22.
  • the arbitration unit 13 determines whether or not the wavelength 2 selected in the wavelength occupation inquiry information is an operable wavelength. If the wavelength is not inoperable, the arbitration unit 13 selects the wavelength selected by the variable wavelength filter 141 in step S24. ; The control to fix to I 2 is canceled and the process returns to step S20. If the wavelength is not operable, the process proceeds to step S25.
  • step S25 the arbitration unit 13 controls the variable wavelength filter 151 to fix the selected wavelength to ⁇ 2 and controls the wavelength conversion unit 113 to output the wavelength ⁇ 2 to the 2: 1 light SW 112.
  • the arbitration unit 13 then transmits a selection wavelength occupation permission notification including the terminal identification ID to the terminal station 20 that has made the wavelength occupation inquiry in step S26. Do this according to length 2.
  • step S27 the arbitration unit 13 cancels the control to fix the variable wavelength filter 141 to the wavelength 2 and changes the recognition of the wavelength 2 of the arbitration unit 13 (wavelength ⁇ 2 is in use).
  • PD153 Monitoring of the client signal input received by the ⁇ unit 114, the wavelength conversion unit 113 is controlled to output the wavelength; 1 2 and the 2: 1 optical SW 112 receives the client signal. Control to select the input ⁇ ⁇ and shift to the data communicable state.
  • FIG. 4 shows a flowchart of the wavelength selection cancellation operation of the terminal station.
  • the control signal termination unit 22 of the terminal station 20 monitors the presence / absence of a client signal in the collar unit 214 of the input control unit 21 in step S30, and proceeds to step S31 when communication of the client signal is completed.
  • step S31 the control signal termination unit 22 controls the 2: 1 optical SW 212 of the terminal station 20 to select the ⁇ part 211 side, cancels the output of the wavelength ⁇ 2 of the wavelength conversion part 213, and the ⁇ / ⁇ part. 21 4 Stop monitoring.
  • control signal termination unit 22 detects the selection wavelength cancellation notification from the master station 10 or the input cutoff of the wavelength ⁇ 2 in step S32, and fixes the wavelength ⁇ 2 of the variable wavelength filter units 231, 241 in step S33. Is released, the output of wavelength converter 2 of wavelength converter 242 is released, communication is stopped, and occupation of wavelength ⁇ 2 is released.
  • FIG. 5 shows a flowchart of the wavelength selection cancellation operation of the master station.
  • the control termination unit 14 monitors the wavelength 2 from the terminal station 20 by monitoring the output value of the PD 153 in step S40, and detects the light stop state in step S41. If the client signal received via 114 is monitored and the input is stopped, the process proceeds to step S42.
  • step S42 the arbitration unit 13 releases the fixed wavelength ⁇ 2 of the variable wavelength filter unit 151, cancels the output of the wavelength of the wavelength conversion unit 152; 1 2 and stops monitoring the output value of the PD 153.
  • the client signal input monitoring by the / ⁇ unit 114 is stopped, and the 2: 1 optical SW unit 112 is changed to the selection on the side of the ⁇ ⁇ unit 111, and the output of the wavelength ⁇ 2 of the wavelength conversion unit 113 is set.
  • the arbitration unit 13 sends a selective wavelength release notification including the terminal identification ID to the terminal station 20 that has occupied the wavelength in step S43.
  • step S44 the arbitration unit 13 releases the control force for fixing the variable wavelength filter 141 to the wavelength ⁇ 2, performs control to fix the 2: 1 light SW112 to the ⁇ / ⁇ portion 111 side, and ⁇ : 4 light. Performs control to release the cross connection between the client signal input of SW unit 17 and the connection between ⁇ 2 outputs and stop the output of ⁇ / ⁇ unit 111.
  • FIG. 6 shows a wavelength selection / cancellation sequence between the terminal station and the master station.
  • Time point tl In the terminal station 20, all the WDM signals on the optical fiber 30 are branched by the optical power plastic units 25 and 27 and supplied to the variable wavelength filter unit 231 of the wavelength monitoring unit 23.
  • the variable wavelength filter unit 231 transmits 4 wavelengths; 1 1 1; 14 at regular intervals regardless of the presence or absence of each wavelength, and supplies the transmitted light to the ⁇ / E unit 232 under the control of the control signal termination unit 22 Do
  • the O / E unit 232 performs optical / electrical conversion to detect the existence of the wavelengths ⁇ , and ⁇ 3 and the absence of the wavelengths ⁇ 2 and ⁇ 4 force S, and the detection result is sent to the control signal termination unit 22 Notify As a result, the terminal station 20 can identify the unused wavelengths ⁇ 2 and ⁇ 4.
  • Time t2 When communication is performed from the terminal station 20, the optical input h input from the client is branched by the optical power bra unit 215 of the input control unit 21 and is transmitted by the ⁇ / E unit 214. After the electrical conversion, the control signal termination unit 22 determines whether or not a client signal is input.
  • the control signal terminator 22 recognizes the unused wavelength ⁇ 2 or ⁇ 4 and selects an arbitrary wavelength (in this case, ⁇ 2) to obtain a variable wavelength.
  • the filter unit 231 is controlled to fix the selected wavelength to ⁇ 2, and the wavelength conversion unit 213 is controlled to output the wavelength ⁇ 2, and the 2: 1 light SW212 is selected to output the unit 211.
  • wavelength occupation inquiry information including the terminal identification ID of its own device (occupation inquiry of selected wavelength ⁇ 2 and matching) is received in accordance with the communication format predetermined for master station 10 ⁇ / ⁇ section 211 The wavelength occupation inquiry information is notified to the master station 10 via the 2: 1 optical SW 212 and the wavelength conversion unit 213.
  • Time t3 In the master station 10, the control termination unit 14 branches all the W DM optical signals received from the optical fiber 31 by the optical power bra unit 16 and supplies the branched signal to the variable wavelength filter unit 141.
  • the unit 141 is controlled at a constant cycle so that only the empty wavelengths 2 and 4 recognized by the arbitration unit 13 pass. As a result, the variable wavelength filter unit 141 transmits only the free wavelength ⁇ 2 or ⁇ 4, detects the presence or absence of each of the optical wavelengths; .
  • Time t4 When the wavelength ⁇ 2 changes from unused to use from the wavelength information recognized by the arbitration unit 13, the arbitration unit 13 performs control to fix the selected wavelength to I2; the variable wavelength filter 141; The wavelength occupation inquiry information from the terminal station 20 is supplied to the arbitration unit 13 via the hook unit 142 and terminated.
  • the arbitration unit 13 controls the variable wavelength filter 151 to fix the selected wavelength to ⁇ 2 when it is determined that the selected wavelength ⁇ 2 of the wavelength occupation inquiry information is not yet used and can be operated. Then, control is performed so that the wavelength ⁇ 2 is output to the wavelength conversion unit 113, and the output of the ⁇ / ⁇ unit 111 is selected for the 2: 1 light SW 11 2.
  • ⁇ Cross-connecting the connection between the client signal input and the ⁇ 2 output using the database held in the arbitration unit 13 in the 4 optical switch unit 17, and in accordance with the communication format determined for the terminal station 20
  • the selected wavelength occupation permission notification including the terminal identification ID of the terminal station 20 that has made the wavelength occupation inquiry is supplied to the E / O unit 111, and this selected wavelength occupation permission notification is a 2: 1 optical SW112, wavelength conversion unit 113, N: 4 optical signal is supplied to the WDM multiplexing unit 12 by the wavelength 2 via the SW unit 17, multiplexed to the WDM signal, and notified to the terminal station 20.
  • the arbitration unit 13 cancels the control to fix the variable wavelength filter 141 to the wavelength ⁇ 2 and changes the recognition of the wavelength ⁇ 2 of the arbitration unit 13 (the wavelength ⁇ 2 is in use). And monitoring of the output value of PD153, monitoring of the client signal input received by ⁇ unit 114, and control to output wavelength; 1 2 to wavelength conversion unit 113, and 2: 1 light SW112 Next, control to select the client signal input ⁇ is performed, and the state shifts to the data communication ready state.
  • Time point t5 The control signal termination unit 22 of the terminal station 20 receives the selected wavelength occupation permission notification addressed to the own apparatus from the master station 10 with the wavelength 2, and performs control according to the selected wavelength occupation permission notification.
  • the variable wavelength filter unit 241 is fixed to pass the wavelength ⁇ 2, and the wavelength conversion unit 242 is controlled to output the wavelength; 1 2 and the 2: 1 light SW212 is input with the client signal ⁇ Control is performed to select the ⁇ side, and control is performed to output the wavelength ⁇ 2 to the wavelength conversion unit 213. Further, the operation of the ⁇ unit 211 is stopped, and communication using the selected wavelength ⁇ 2 is started.
  • control signal termination unit 22 If the control signal termination unit 22 detects no response (response 'timeout) of the master station 10, the control signal termination unit 22 returns to the time t2 and selects another unused wavelength; 14 to execute the wavelength occupation processing again. To do.
  • Time t6 When the control signal termination unit 22 of the terminal station 20 monitors the client signal received via the optical power plastic unit 215 and the OZE unit 214 and communication ends, Control is performed so as to select the unit 21 1 side, the wavelength ⁇ 2 output of the wavelength conversion unit 213 is canceled, and the monitoring of the O / E unit 214 is stopped.
  • Time t7 The arbitration unit 13 of the master station 10 confirms the optical stop state of the wavelength ⁇ 2 from the terminal station 20 by monitoring the output value of the PD 153, and passes through the light power unit 115 and the ⁇ / ⁇ unit 114. If the received client signal input stop is confirmed, and the arbitration unit 13 confirms the optical stop state from the terminal station 20 and the stop of the client signal input, the tunable filter 2 151 of the variable wavelength filter unit 151 is released. Then, cancel the wavelength 2 output of the wavelength conversion unit 152, stop the output value monitoring of the PD153, and stop the client signal input monitoring by the ⁇ / ⁇ unit 114.
  • the 2: 1 optical SW unit 112 is changed to the selection on the ⁇ / ⁇ unit 111 side, the output of the wavelength ⁇ 2 of the wavelength conversion unit 11 3 is set, and the arbitration unit 13 sends the signal to the terminal station 20
  • the selected wavelength release notification including the terminal identification ID of the terminal that has occupied the wavelength is supplied to EZ0 111.
  • This selective wavelength cancellation notification is supplied to the WDM multiplexing unit 12 via the 2: 1 optical SW112, the wavelength conversion unit 113, ⁇ : 4 optical 3 unit 17, and the WDM multiplexing unit 12, and is multiplexed with the WDM signal to the terminal station. 20 will be notified.
  • the arbitration unit 13 stops the E / O unit 1 1 1, cancels the wavelength conversion unit 1 1 3 wavelength; 1 2 output, and N: 4 optical SW unit 17 Cancel the cross-connect.
  • Time t8 In the terminal station 20, when the control signal termination unit 22 detects the cancellation of the selected wavelength from the master station 10 or the input cutoff of the wavelength ⁇ 2, the wavelength of the variable wavelength filter units 231 and 241 is changed to 2 Release the lock, release wavelength 2 output of wavelength converter 242 and stop communication to release the occupation of wavelength ⁇ 2.
  • variable wavelength filter unit 231 transmits the four wavelengths ⁇ 1 to ⁇ 4 at a constant period regardless of the presence or absence of each wavelength under the control of the control signal termination unit 22, and transmits the transmitted light to Supply to part 232
  • the wavelength can be occupied in units of communication time, it is possible to accommodate terminal stations having more than the number of wavelengths and to effectively use the wavelength resources.
  • the wavelength can be occupied in units of communication time, the cost for the amount of data traffic can be reduced.
  • the scale of the apparatus can be reduced, and the number of accommodations can be easily increased or decreased.
  • the terminal station 20 since the unused wavelength is detected autonomously by the terminal station 20, the unused wavelength is notified from other stations, whereas the wavelength occupation can be performed at high speed. Further, the difference in configuration between the terminal station 20 and the master station 10 is whether or not the arbitration unit 13 is provided, and most of the configuration of the terminal station and the master station can be shared to reduce the manufacturing cost.
  • the terminal station 20 has only one input control unit 21 in the circuit. However, as with the master station 10, the terminal station 20 may have a configuration having a plurality of input control units, an optical SW unit, and a WDM multiplexing unit. .
  • the client signal is described as being connected between the terminal station 20 and the master station 10, but the client signal may be connected between a plurality of terminal stations 20. good.
  • Steps S10 and S20 correspond to the monitoring means described in the claims
  • step S14 corresponds to the wavelength occupation inquiry means
  • step S17 corresponds to the wavelength occupation communication means
  • steps S3 3 and S44 include the wavelength occupation.
  • Step S26 corresponds to the selected wavelength occupation permission notification means
  • step S43 corresponds to the selected wavelength release notification means
  • step S31 corresponds to the end of communication.
  • Step S25 corresponds to the communication means.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Optical Communication System (AREA)

Abstract

L'invention porte sur un procédé de gestion des longueurs d'ondes d'un réseau optique, des stations terminales étant connectées à une station centrale par des fibres optiques de façon à établir une communication par multiplexage par répartition en longueur d'onde. Une station terminale surveille l'état utilisé de la longueur d'onde dans le réseau optique. Lorsqu'un signal client extérieur est introduit, la station terminale envoie des informations de consultation concernant l'occupation de la longueur d'onde afin d'obtenir des renseignements sur l'occupation d'une longueur d'ondes non utilisée dans le réseau optique avec une longueur d'onde non utilisées dans la station centrale. Le la station centrale surveille l'état utilisé de la longueur d'onde dans le réseau optique. Lorsqu'on peut utiliser les informations obtenues suite à la consultation sur l'occupation de la longueur d'onde, la station centrale envoie une notification d'autorisation de l'occupation de la longueur d'onde sélectionnée de façon à permettre l'occupation d'une longueur d'onde non utilisée dans la station terminale avec une longueur d'onde non utilisée. La station terminale occupe la longueur d'onde autorisée telle que mentionnée dans la notification d'autorisation de l'occupation de la longueur d'onde sélectionnée et envoie un signal client dans le réseau optique en superposant le signal client extérieur sur l'onde de la longueur d'onde autorisée. Lorsque la station centrale détecte la fin de la transmission du signal client, la station centrale envoie à la station terminale une notification d'annulation de la longueur d'onde sélectionnée. La station terminale annule l'occupation de la longueur d'onde dans le réseau optique à la réception de la notification d'annulation précitée. Les longueurs d'ondes peuvent donc être efficacement utilisées, et il est ainsi possible de réduire l'augmentation du coût du volume du trafic des communications.
PCT/JP2005/000950 2005-01-26 2005-01-26 Procede de gestion de longueurs d'ondes dans un reseau optique, station terminale et station centrale WO2006080051A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP2005/000950 WO2006080051A1 (fr) 2005-01-26 2005-01-26 Procede de gestion de longueurs d'ondes dans un reseau optique, station terminale et station centrale

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2005/000950 WO2006080051A1 (fr) 2005-01-26 2005-01-26 Procede de gestion de longueurs d'ondes dans un reseau optique, station terminale et station centrale

Publications (1)

Publication Number Publication Date
WO2006080051A1 true WO2006080051A1 (fr) 2006-08-03

Family

ID=36740086

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2005/000950 WO2006080051A1 (fr) 2005-01-26 2005-01-26 Procede de gestion de longueurs d'ondes dans un reseau optique, station terminale et station centrale

Country Status (1)

Country Link
WO (1) WO2006080051A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008081545A1 (fr) * 2006-12-28 2008-07-10 Fujitsu Limited Dispositif et procédé de transmission optique

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003298531A (ja) * 2002-04-01 2003-10-17 Fujitsu Ltd 波長多重伝送システムにおける信号伝送方法並びに波長多重伝送システムに使用される波長多重送信装置，光分岐／挿入装置及び伝送装置
JP2004266455A (ja) * 2003-02-28 2004-09-24 Nippon Telegr & Teleph Corp <Ntt> 光波長多重通信システム

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003298531A (ja) * 2002-04-01 2003-10-17 Fujitsu Ltd 波長多重伝送システムにおける信号伝送方法並びに波長多重伝送システムに使用される波長多重送信装置，光分岐／挿入装置及び伝送装置
JP2004266455A (ja) * 2003-02-28 2004-09-24 Nippon Telegr & Teleph Corp <Ntt> 光波長多重通信システム

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008081545A1 (fr) * 2006-12-28 2008-07-10 Fujitsu Limited Dispositif et procédé de transmission optique
JP4751934B2 (ja) * 2006-12-28 2011-08-17 富士通株式会社 光伝送装置および光伝送方法

Similar Documents

Publication Publication Date Title
US9712241B2 (en) Communication system, master station device, slave station device, control unit, and communication control method
US9136968B2 (en) Time and wavelength division multiplexing—passive optical network (TWDM-PON) system and communication link method thereof
US8260133B2 (en) Standby restoration signaling for optical networks
EP1841114B1 (fr) Appareil pour station d&#39;un système PON à multiplexage de longueurs d&#39;onde, procédé d&#39;attribution de longueurs d&#39;onde et d&#39;adresses de réseau, et programme associé
JP5058910B2 (ja) ポイント−マルチポイントシステムにおける冗長化伝送システム
CN105684326A (zh) 从站装置、主站装置、控制装置、通信系统及波长切换方法
JPWO2010023721A1 (ja) Ｐｏｎシステムおよび冗長化方法
JP4994300B2 (ja) 光終端装置
US20150222385A1 (en) Transponder for wdm ring network
CN106576066A (zh) 子站装置、母站装置、光通信系统及异常检测方法
JP5335952B2 (ja) ポイント−マルチポイントシステムにおける冗長化伝送システム
US8406625B2 (en) Apparatus and method for cross-connecting optical path in wavelength division multiplexing system
JP6285611B2 (ja) 局側装置及び波長切替監視方法
JP2010041444A (ja) 光波長多重分割システムの自動波長チューニング制御方式
JP2009296044A (ja) 光送信装置および光送受信装置
WO2006080051A1 (fr) Procede de gestion de longueurs d&#39;ondes dans un reseau optique, station terminale et station centrale
JPH0918596A (ja) 通信ネットワークおよび通信方式
JP2009088785A (ja) 光アクセス網システム
JP4488813B2 (ja) 直接的に接続された光学素子を管理するための方法及びシステム
US20060127094A1 (en) Wavelength division multiple access central station, wavelength division multiple access user interface, and optical layer connection service method in optical network using wavelength division multiple access scheme
JP5655019B2 (ja) 光通信システム
JP6418271B2 (ja) 通信システム、親局装置及び子局装置
JP2010206760A (ja) Ｅｐｏｎシステム及び局側終端装置
WO2004028044A1 (fr) Systeme et procede de determination de signal optique
KR20140068779A (ko) 시간 및 파장 분할 다중화 - 수동형 광가입자 망 시스템 및 이의 통신 연결 방법

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application
122 Ep: pct application non-entry in european phase

Ref document number: 05709333

Country of ref document: EP

Kind code of ref document: A1

WWW Wipo information: withdrawn in national office

Ref document number: 5709333

Country of ref document: EP

NENP Non-entry into the national phase

Ref country code: JP