CN101534164A - Method and system for transmitting signal by optical transmitting network - Google Patents

Method and system for transmitting signal by optical transmitting network Download PDF

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Publication number
CN101534164A
CN101534164A CN 200910135539 CN200910135539A CN101534164A CN 101534164 A CN101534164 A CN 101534164A CN 200910135539 CN200910135539 CN 200910135539 CN 200910135539 A CN200910135539 A CN 200910135539A CN 101534164 A CN101534164 A CN 101534164A
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oms
optical
signal
wavelength
transmitting
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CN 200910135539
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CN101534164B (en
Inventor
阎君
陈亘
张波
何达
曾宇
谭伟
陈旻
裴玲
刘彦
张德江
李时星
张建梅
扶文忠
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Priority to CN 200910135539 priority Critical patent/CN101534164B/en
Publication of CN101534164A publication Critical patent/CN101534164A/en
Priority to PCT/CN2010/071191 priority patent/WO2010121512A1/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/16—Time-division multiplex systems in which the time allocation to individual channels within a transmission cycle is variable, e.g. to accommodate varying complexity of signals, to vary number of channels transmitted
    • H04J3/1605—Fixed allocated frame structures
    • H04J3/1652—Optical Transport Network [OTN]
    • 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
    • H04J14/0254—Optical medium access
    • H04J14/0261—Optical medium access at the optical multiplex section layer
    • H04J14/0263—Multiplex section layer wavelength assignment algorithms
    • 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
    • H04J14/0254—Optical medium access
    • H04J14/0261—Optical medium access at the optical multiplex section layer
    • H04J14/0264—Multiplex identification or labelling
    • 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
    • H04J14/0254—Optical medium access
    • H04J14/0272—Transmission of OAMP information
    • H04J14/0273—Transmission of OAMP information using optical overhead, e.g. overhead processing
    • 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
    • H04J14/0254—Optical medium access
    • H04J14/0272—Transmission of OAMP information
    • H04J14/0275—Transmission of OAMP information using an optical service channel
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0287—Protection in WDM systems
    • H04J14/0289—Optical multiplex section protection
    • H04J14/0291—Shared protection at the optical multiplex section (1:1, n:m)

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

Abstract

An embodiment of the invention discloses a method and a system for transmitting signal by optical transmitting network which relate to the communication field, and solve problem that OMS layer spending and the represent function can not be appropriate used for operating managing maintaining OMS layer. A solution is that: an optical transmitting segment layer OTS corresponds to a plurality of optical compound segment layers OMS with various wave band, wherein, the spending and clean charge among various OMS are mutual independence; when a certain node unit has wave band loading operation or download operation, OMS relative to the wave band is confirmed, and the OMS is finished to regeneration, and other OMS is not finished to regeneration. The method and the system are used for transmitting optical signal by the optical transmitting network.

Description

The method and system of transmitting signal by optical transmitting network
Technical field
The present invention relates to the communications field, relate in particular to a kind of method and system of transmitting signal by optical transmitting network.
Background technology
(Optical Transport Network OTN), is based on wavelength-division multiplex technique, at the transmission net of photosphere organization network to optical transfer network.OTN will solve traditional WDM (Wavelength DivisionMultiplexing, wavelength division multiplexing) network does not have problems such as the long service dispatching ability of wavelength/wavelet, networking capability is weak, protective capability is weak.In the hierarchy of optical transfer network OTN, be subdivided into the light path layer (OpticalChannel, OCh), optical multiplex layer (Optical Multiplex Section, OMS) and optical transport layer (Optical Transmission Section, OTS).
Along with the development and the extensive application of OTN technology, improved the OAM﹠amp of wdm system; P (OperationAdministration Maintenance ﹠amp; Provisioning, operation management maintain configuration) ability.
When transmitting signal by optical transmitting network, because the restriction of device capabilities, C-band need use different amplifiers to amplify with L-band.The multi-wavelength signals of C+L will carry out the partial wave of C and L earlier at OLA (Optical Line Amplifier, optical line amplifier) node, and the C-band behind the partial wave uses the image intensifer of C-band to amplify, and L-band uses the image intensifer of L-band to amplify.That is to say,,, will carry out the partial wave of C and L and close ripple at the OLA node for the application of C+L owing to can only use corresponding image intensifer.
OM (Optical Multiplexing, recovery is used) and ODM (Optical Dcmultiplexing, Optical Demultiplexing) locate to carry out in OMSn/OCh_A function (and OPS16/OChr_A).That is to say that the process of closing ripple or partial wave is a termination regeneration OMS layer, promptly close ripple or the partial wave of C-band wavelength and L-band wavelength are the termination OMS layers of regenerating.
State in realization in the process, the inventor finds that there are the following problems at least in the prior art:
The OMS layer is terminated regeneration in inappropriate place, thereby, operation management maintain OMS level effectively.
Summary of the invention
Embodiments of the invention provide a kind of method and system of transmitting signal by optical transmitting network, can carry out operation management maintain effectively to the OMS layer.
For achieving the above object, embodiments of the invention adopt following technical scheme:
A kind of method of transmitting signal by optical transmitting network comprises:
A plurality of optical multiplex layer OMS of a corresponding different-waveband of optical transmission section layer OTS, wherein, expense and payload between the different OMS are separate;
When a certain node unit has on the wavelength when professional or professional down, determine the OMS of this wavelength correspondence, this OMS of termination regeneration, for other OMS, regeneration does not then terminate.
The method of the transmitting signal by optical transmitting network that the embodiment of the invention provides, OTS and OMS are by the original corresponding one by one OMS that changes the corresponding a plurality of different-wavebands of OTS into, expense and payload between the different OMS are separate, when having wavelength up and down in the wavelength band of some OMS, this OMS of termination regeneration is not that the OMS under this wave band is not terminated regeneration.Therefore, OMS can be in suitable place termination regeneration, and the expense of OMS and the function of representative thereof can be applied to the operation management maintain to OMS rightly.
A kind of optical transport network system comprises:
Optical wavelength conversion element is used under the situation that does not change the optical signal data form optical wavelength being changed again the signal after obtaining changing;
Optical Multiplexer Unit, the different-waveband of the signal after the corresponding conversion is provided with a plurality of, is used for the signal after the conversion of correspondence is recovered usefulness, obtains multiplexing back signal, when having wavelength professional up and down in the wavelength band of Optical Multiplexer Unit correspondence, the OMS under the described wavelength of termination regeneration;
Optical Amplifier Unit, corresponding one by one with Optical Multiplexer Unit, be used for multiplexing back signal is amplified;
Line interface unit connects each Optical Amplifier Unit, is used to transmit the signal after the amplification;
The Optical Supervisory Channel unit is used to transmit optical wavelength conversion element, Optical Multiplexer Unit, Optical Amplifier Unit, the signal overhead of line interface unit.
The optical transport network that the embodiment of the invention provides, the corresponding Optical Multiplexer Unit of Optical Amplifier Unit, a plurality of Optical Amplifier Units connect same line interface unit, and expense between the different Optical Multiplexer Unit and payload are independent separately, and when having wavelength up and down in the wavelength band of some Optical Multiplexer Unit, this OMS of termination regeneration.Therefore, OMS can regenerate in suitable place termination, and then the function of the expense of Optical Multiplexer Unit and representative thereof can be applied to the operation management maintain to OMS rightly.
Description of drawings
The FB(flow block) of the method for the transmitting signal by optical transmitting network that Fig. 1 provides for the embodiment of the invention;
The schematic diagram of the atomic function model that Fig. 2 provides for the embodiment of the invention;
The schematic diagram of the method for the transmitting signal by optical transmitting network that Fig. 3 provides for the embodiment of the invention one;
The atomic function model schematic diagram of the OLA node in the method for the transmitting signal by optical transmitting network that Fig. 4 provides for the embodiment of the invention one;
The atomic function model schematic diagram of the OADM node in the method for the transmitting signal by optical transmitting network that Fig. 5 provides for the embodiment of the invention one;
The schematic diagram of the method for the transmitting signal by optical transmitting network that Fig. 6 provides for the embodiment of the invention two;
The schematic diagram of the method for the transmitting signal by optical transmitting network that Fig. 7 provides for the embodiment of the invention three;
The schematic diagram of the method for the transmitting signal by optical transmitting network that Fig. 8 provides for the embodiment of the invention four;
The structural representation of the optical transport network system that Fig. 9 provides for the embodiment of the invention;
The structural representation of the optical transport network system that Figure 10 provides for this another bright embodiment.
Embodiment
Embodiments of the invention provide a kind of method and system of transmitting signal by optical transmitting network, can carry out operation management maintain effectively to the OMS layer.
The method of the transmitting signal by optical transmitting network that the embodiment of the invention provides, as shown in Figure 1, this method step comprises:
A plurality of optical multiplex layer OMS of S101, a corresponding different-waveband of optical transmission section layer OTS, wherein, expense and payload between the different OMS are separate;
S102, when a certain node unit has on the wavelength when professional or professional down, determine the OMS of this wavelength correspondence, this OMS of termination regeneration, for other OMS, regeneration does not then terminate.
The method of the transmitting signal by optical transmitting network that the embodiment of the invention provides, OTS and OMS are by the original corresponding one by one OMS that changes the corresponding a plurality of different-wavebands of OTS into, expense and payload between the different OMS are separate, when having wavelength up and down in the wavelength band of some OMS, this OMS of termination regeneration is not that the OMS under this wave band is not terminated regeneration.Therefore, OMS can be in suitable place termination regeneration, and the expense of OMS and the function of representative thereof can be applied to the operation management maintain to OMS rightly.
In addition, the atomic function model of the method that the embodiment of the invention provides as shown in Figure 2, wherein dotted portion is place unlike the prior art, and is concrete:
In atomic function illustraton of model 2, OMS by a dotted line oval 101 is represented, the OMS layer has linkage function in the method that the embodiment of the invention provides, and can carry out interconnection, promptly can carry out cross-coupled control to the granularity of a plurality of OMS of comprising the different-waveband signal.So, the control of carrying out at the OCh layer originally can be carried out at the OMS layer, has reduced the level that needs processing, has saved cost, has improved efficient;
Have again, in atomic function illustraton of model 2, the oval leg-of-mutton OMS102 in 101 right sides of OMS represents in the dotted line is the non-intervention function for monitoring of the OMS that adds in embodiments of the present invention, signal is delivered to here and is monitored, can obtain the quality of signals situation by monitoring, report and alarm signal when signal is defective in quality, perhaps, the control protection is switched, and does not change signal, does not influence signal and continues to deliver to other places, delivering to other follow-up nodes continues to handle, the same script that makes can carry out at the OMS layer in the control that the OCh layer carries out, and has reduced the level that needs processing, has saved cost;
The 3rd; in atomic function illustraton of model 2; the a lot of single wavelength of output output of trapezoidal " optical multiplexing section/optical channel " 103 in the dotted line, we use one of them wavelength as the test wavelength, promptly for each OMS; in the scalable scope of EDFA, increase the test wavelength; this wavelength is monitored, can obtain the quality of signals situation by monitoring, can the report and alarm signal when being checked through quality problems; perhaps, can control protection switches.
Embodiment one:
The method of the transmitting signal by optical transmitting network that the embodiment of the invention one provides is that example describes with the signal that transmits the C+L wave band simultaneously, as shown in Figure 3.
Transmit at the same time under the situation of signal of C+L wave band, according to wave band OMS is divided, this enforcement is divided into C-band and L-band, and the OMS of each wave band has separately independently expense and payload, all expenses all monitor on the path OSC at light and transmit, so that monitor.Therefore, C-band has the OMS layer of C-band, and L-band has the OMS layer of L-band.
On the A node of the signal of C-band from Fig. 3, under the E node, promptly concerning C-band, the wavelength of all C-band inside is all on the A node, under the E node; On the A node of the signal of L-band from Fig. 3, under the C node, promptly for L-band, all on the A point, the C point down for the wavelength of all L-band inside.The B node (optical line amplifier, OLA), the D node (optical line amplifier OLA) does not have about the wavelength, the former capital regeneration OMS that do not terminate, the C node has only under the signal of L-band, thus the OMS of termination regeneration L-band only, the OMS of the regeneration C-band that do not terminate; So the OMS path of C-band signal is one, starting point is at the A node, and terminal point is at the E node, and the OMS path of L-band signal also is one, and starting point is at the A node, and terminal point is at the C node.The atomic function model of OLA node among Fig. 3 (comprising B node and D node) as shown in Figure 4, this OLA node only terminate regeneration OTS, OMS and above transparent transmission, shown in the atomic function illustraton of model 5 of C node (optical add/drop multiplexer OADM) (Fig. 5 has only represented unidirectional, i.e. from left to right direction among Fig. 3).
Like this, if the OMS between AE is carried out operation management maintain at the E node, just can operation management maintain C-band signal from last business to professional complete OMS down.
Equally, if the OMS between AC is carried out operation management maintain at the C node, just can operation management maintain L-band signal from last business to professional complete OMS down.
The method of the transmitting signal by optical transmitting network that the embodiment of the invention provides, OTS and OMS are by the original corresponding one by one OMS that changes the corresponding a plurality of different-wavebands of OTS into, expense and payload between the different OMS are separate, when having wavelength up and down in the wavelength band of some OMS, this OMS of termination regeneration is not that the OMS under this wavelength is not terminated regeneration.Therefore, OMS can be in suitable place termination regeneration, and the expense of OMS and the function of representative thereof can be applied to the operation management maintain to OMS rightly.
Embodiment two:
The method of the transmitting signal by optical transmitting network that the embodiment of the invention two provides is that example describes with the signal that transmits thick wavelength-division CWDM and dense wavelength division DWDM mixing, as shown in Figure 6.
Under the situation of the signal of mixed C WDM and DWDM, according to wave band OMS to be divided, this enforcement is divided into CWDM wave band and DWDM wave band, and the OMS of each wave band has independently expense and payload, and all expenses all monitor on the path OSC at light and transmit.Therefore, CWDM has the OMS of CWDM, and DWDM has the OMS of DWDM.
On the A node of CWDM wavelength from Fig. 6, under the C node.The DWDM wavelength is from the B node, under the D node.
Similar with the foregoing description one, because have only the OMS of this wave band of regeneration that just terminates up and down that wavelength is arranged in this wave band, so have 2 OMS path.Be respectively the OMS of the CWDM between AC and the OMS of the DWDM between BD, the do not terminate OMS of regeneration CWDM of B node, C node be the OMS of termination regeneration DWDM also.
Under the situation of mixing for CWDM and DWDM, OMS path is terminated regeneration in appropriate place in other words, and the expense of OMS and the function of representative thereof can be appropriate is applied to operation management maintain OMS level.For example, the wavelength of CWDM is on the A node, under the C node, then the OMS expense to CWDM produces at the A node, monitor at the C node, can be used in management and supervision from professional on the wavelength of CWDM, and then can carry out operation management maintain to this OMS better to professional down full breadth.
The method of the transmitting signal by optical transmitting network that the embodiment of the invention provides, OTS and OMS are by the original corresponding one by one OMS that changes the corresponding a plurality of different-wavebands of OTS into, expense and payload between the different OMS are separate, when having wavelength up and down in the wavelength band of some OMS, this OMS of termination regeneration is not that the OMS under this wavelength is not terminated regeneration.Therefore, OMS can be in suitable place termination regeneration, and the expense of OMS and the function of representative thereof can be applied to the operation management maintain to OMS rightly.
Embodiment three:
The method of the transmitting signal by optical transmitting network that the embodiment of the invention three provides is to realize that the OMS path protection is that example describes, as shown in Figure 7.
2 paths are arranged between A node and the C node, and one is directly to be connected to the C node from the A node, and an other distance is far away, and needing increases an optical relay Node B, promptly is connected to the B node from the A node, is connected to the C node from the B node again.
For the C+L signal, it all is by on the A node, and to the C node down, the B node does not have about the wavelength, thereby do not terminate any OMS that regenerates of B node, so no matter which way to go the warp of the OMS between AC all is 2, i.e. and a C-band OMS and 1 L-band OMS.
Therefore, can dispose the OMS path protection of 1 C-band and the OMS path protection of 1 L-band, just can protect the business up and down of C-band and the professional up and down complete OMS of L-band.
The method of the transmitting signal by optical transmitting network that the embodiment of the invention provides, OTS and OMS are by the original corresponding one by one OMS that changes the corresponding a plurality of different-wavebands of OTS into, expense and payload between the different OMS are separate, when having wavelength up and down in the wavelength band of some OMS, this OMS of termination regeneration is not that the OMS under this wavelength is not terminated regeneration.Therefore, OMS can be in suitable place termination regeneration, and the expense of OMS and the function of representative thereof can be applied to the operation management maintain to OMS rightly.
Embodiment four:
The method of the transmitting signal by optical transmitting network that the embodiment of the invention four provides is to realize that the OMS protection rings is that example describes, as shown in Figure 8.
If all descend professional from B node direction all wavelengths left to the A node, just no longer including wavelength from the A node down to the F node direction among the figure has so descended, the A node can insert the OMS payload and lost index signal (PMI) this moment, and the F node can detect payload signal lossing signal (LOS-P) and PMI simultaneously.The F node detection just means from the A node down to the F node not to be the problem between A node and the F node, so the F node is not used as the condition of switching with LOS-P without any about the wavelength to PMI.
Another kind of situation, if the A node has broken down to optical fiber between the F node, the payload signal and the light that will influence a plurality of wavelength simultaneously monitor path, at this moment, even without payload signal, the F node also can be found fault by the expense that detects light supervision path, promptly detects overhead signal lossing signal (LOS-O), initiates the protocol interaction of switching.
In other words; if the image intensifer of upstream A node breaks down; it only is the payload that has influenced each wavelength; downstream F node still can detect LOS-P and PMI; this moment can be at the F node to each OMS; in the scalable scope of EDFA, increase a test wavelength and monitor; by monitoring that the result judges is because thereby upstream A node is not gone up the professional downstream F node detection that causes to LOS-P and PMI; still because the image intensifer of upstream A node breaks down caused; as determining it is that institute causes because the image intensifer of A node breaks down excessively, then initiate protection and switch.
The method of the transmitting signal by optical transmitting network that the embodiment of the invention provides; can be for each OMS; in the scalable scope of EDFA, increase the test wavelength; this wavelength is monitored; can obtain the quality of signals situation by monitoring; can the report and alarm signal when being checked through quality problems, perhaps, can control protection and switch.
The optical transport network system that the embodiment of the invention provides, as shown in Figure 9, this system comprises:
Optical wavelength conversion element 901 is used under the situation that does not change the optical signal data form optical wavelength being changed again the signal after obtaining changing;
Optical Multiplexer Unit 902, the different-waveband of the signal after the corresponding conversion is provided with a plurality of, is used for the signal after the conversion of correspondence is recovered usefulness, obtains multiplexing back signal, when having wavelength professional up and down in the wavelength band of Optical Multiplexer Unit 902 correspondences, the OMS under this wavelength of termination regeneration;
Optical Amplifier Unit 903, corresponding one by one with Optical Multiplexer Unit, be used for multiplexing back signal is amplified;
Line interface unit 904 connects each Optical Amplifier Unit, is used to transmit the signal after the amplification;
Optical Supervisory Channel unit 905 is used to transmit optical wavelength conversion element 901, Optical Multiplexer Unit 902, Optical Amplifier Unit 903, the signal overhead of line interface unit 904.
The optical transport network that the embodiment of the invention provides, the corresponding Optical Multiplexer Unit of Optical Amplifier Unit, a plurality of Optical Amplifier Units connect same line interface unit, and expense and payload between the different Optical Multiplexer Unit are separate, and when having wavelength up and down in the wavelength band of some Optical Multiplexer Unit, this OMS of termination regeneration.Therefore, OMS can regenerate in suitable place termination, and then the function of the expense of Optical Multiplexer Unit and representative thereof can be applied to the operation management maintain to OMS rightly.
Further, the optical transport network that another embodiment of the present invention provides, as shown in figure 10, Optical Multiplexer Unit 902 further comprises:
Link control module 902A is used for a plurality of granularities that comprise the OMS of different-waveband signal are carried out cross-coupled control;
Non-intervention monitor module 902B is used for signal is monitored, obtains described quality of signals situation, report and alarm signal when signal is defective in quality, and perhaps, the control protection is switched.
Link control module 902A in the embodiment of the invention carries out interconnection, can operate a plurality of wave band integral body, rather than carry out the interconnection operation at original OCh layer, has reduced the level that needs processing, has saved cost, has improved efficient; In addition, the non-intervention monitor module 902B in the present embodiment can carry out monitor protection to OMS, makes the control of carrying out at the OCh layer originally to carry out at the OMS layer, has reduced the level that needs processing, has saved cost.
What present embodiment was enumerated is the system that sends an end, and corresponding, the system's setting that receives an end is similar with it.
The above; only be the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; can expect easily changing or replacing, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion by described protection range with claim.

Claims (9)

1, a kind of method of transmitting signal by optical transmitting network is characterized in that, comprising:
A plurality of optical multiplex layer OMS of a corresponding different-waveband of optical transmission section layer OTS, wherein, expense and payload between the different OMS are separate;
When a certain node unit has on the wavelength when professional or professional down, determine the OMS of described wavelength correspondence, the described OMS of termination regeneration, for other OMS, regeneration does not then terminate.
2, the method for transmitting signal by optical transmitting network according to claim 1 is characterized in that, the expense of described each OMS all monitors that by light path OSC transmits.
3, the method for transmitting signal by optical transmitting network according to claim 1 is characterized in that, the OMS of described a plurality of different-wavebands comprises:
Thick wavelength-division CWDM, the dense wavelength division DWDM of C-band, the dense wavelength division DWDM of L-band.
4, the method for transmitting signal by optical transmitting network according to claim 1 is characterized in that, the down professional node unit of wavelength to from the wavelength professional under the wavelength OMS the business carry out operation management maintain.
5, the method for transmitting signal by optical transmitting network according to claim 1 is characterized in that, described method further comprises:
At the OMS layer granularity of a plurality of OMS of comprising the different-waveband signal is carried out cross-coupled control.
6, the method for transmitting signal by optical transmitting network according to claim 1 is characterized in that, described method further comprises:
At OMS signal is monitored, obtain described quality of signals situation, report and alarm signal when signal is defective in quality, perhaps, the control protection is switched.
7, the method for transmitting signal by optical transmitting network according to claim 1 is characterized in that, described method also comprises:
To the OMS of each wave band, in the scalable scope of erbium-doped fiber amplifier EDFA, increase the test wavelength, described wavelength is monitored, obtain the quality of signals situation, report and alarm signal when being checked through quality problems, perhaps, the control protection is switched.
8, a kind of optical transport network system is characterized in that, comprising:
Optical wavelength conversion element is used under the situation that does not change the optical signal data form optical wavelength being changed again the signal after obtaining changing;
Optical Multiplexer Unit, the different-waveband of the signal after the corresponding described conversion is provided with a plurality of, be used for the signal after the described conversion of correspondence is recovered usefulness, obtain multiplexing back signal, when having wavelength professional up and down in the wavelength band of described Optical Multiplexer Unit correspondence, the OMS under the described wavelength of termination regeneration;
Optical Amplifier Unit, corresponding one by one with described Optical Multiplexer Unit, be used for described multiplexing back signal is amplified;
Line interface unit connects each described Optical Amplifier Unit, is used to transmit the signal after the described amplification;
The Optical Supervisory Channel unit is used to transmit described optical wavelength conversion element, Optical Multiplexer Unit, Optical Amplifier Unit, the signal overhead of line interface unit.
9, optical transport network according to claim 8 system is characterized in that described Optical Multiplexer Unit further comprises:
Link control module is used for a plurality of granularities that comprise the OMS of different-waveband signal are carried out cross-coupled control;
Non-intervention monitor module is used for signal is monitored, obtains described quality of signals situation, report and alarm signal when signal is defective in quality, and perhaps, the control protection is switched.
CN 200910135539 2009-04-21 2009-04-21 Method and system for transmitting signal by optical transmitting network Active CN101534164B (en)

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PCT/CN2010/071191 WO2010121512A1 (en) 2009-04-21 2010-03-23 Data communication method, data communication system and related apparatus

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CN105160124A (en) * 2015-09-23 2015-12-16 烽火通信科技股份有限公司 Overhead simulation system and method for optical transport network
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