CN103840906A - OTN system and method supporting supervisory channel light single-optical-fiber bidirectional transmission - Google Patents
OTN system and method supporting supervisory channel light single-optical-fiber bidirectional transmission Download PDFInfo
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- 230000002457 bidirectional effect Effects 0.000 title claims abstract description 11
- 230000003287 optical effect Effects 0.000 claims abstract description 170
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 52
- 238000012544 monitoring process Methods 0.000 claims description 43
- 239000000835 fiber Substances 0.000 claims description 28
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- 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
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Abstract
The invention discloses an OTN system and method supporting supervisory channel light single-optical-fiber bidirectional transmission and relates to the field of OTN networks. The system comprises an upstream station and a downstream station, two optical amplifier units and one optical supervisory channel unit are arranged inside each station, and each station further comprises a wave combining and separating unit. Each wave combining and dividing unit comprises an optical circulator and a wave combining and separating device, and output of the optical supervisory channel units is connected with upper movable joint optical paths on the optical circulators, and public ports of the optical circulators are connected with optical paths of the wave combining and spearing device. Lower movable joints of the optical circulators are connected with input optical paths of the optical supervisory channel units, the wave combining and separating devices of the two stations are connected through two optical fibers, one optical fiber comprises supervisory channel light in bidirectional transmission and forward-direction service light in bidirectional transmission, and the other optical fiber comprises backward-direction service light. An out-of-band mode is adopted for transmitting an IEEE1588V2 protocol message, so that light with long light waves in the supervisory channel is received and transmitted in the same optical fiber, it is avoided that receiving and transmitting paths are not symmetrical, and uniformity of receiving and transmitting delay is guaranteed.
Description
Technical field
The present invention relates to OTN network field, is specifically a kind of OTN system and method for supporting that monitoring and controlling channels light single fiber bi-directional transmits.
Background technology
Optical-fiber network transmission equipment is as present mobile communication service bearer network time, also can realize by the carrying of IEEE1588V2 agreement the ground transmission of time synchronization information, send time synchronization information to each base station by the load bearing equipment on ground, realize high-precision time synchronized.Along with popularizing of mobile Internet application, the demand of bandwidth has presented growth fast.There is the OTN(Optical Transport Network of the large capacity of multi-wavelength and electric cross scheduling flexibility, optical transfer network) network progressively sink to converge or access aspect use.IEEE1588V2 is in the transmission of OTN network also being widely adopted more and more.
Because IEEE1588V2 is in the mechanism that realizes time synchronized, it is symmetrical requiring to transmit the delay of IEEE1588V2 message on transmitting-receiving path, and traditional OTN network is all generally the network configuration of two fine bidirectional modes, and equidirectional business light and monitoring and controlling channels light is in same optical fiber, most bearer services postpone not symmetrically to be strict with to transmitting-receiving.So between the OTM website of OTN network may there is the difference of increasing path delay in the transmitting-receiving of (may there be multiple simple light amplification websites centre).Although asymmetric difference can, after measuring, be set in the processing unit of processing IEEE1588V2 and make up in this, the popularity of engineering and the complexity of test are promoted great being difficult to of this methods engineering.
In the OTN network equipment, the bearing mode of IEEE1588V2 is mainly contained to (transmission of business light) and outer (transmission of monitoring and controlling channels light) the two kinds of modes of band in band.Because in-band method is to be carried by business optical wavelength, and what business optical wavelength adopted on transmission path is the different optical fiber of transmitting-receiving, exist transmitting-receiving to postpone asymmetric problem, multiplexing and add the variation that also there will be delay in the process of FEC in the mapping of business.
Summary of the invention
For the defect existing in prior art, the object of the present invention is to provide a kind of OTN system and method for supporting that monitoring and controlling channels light single fiber bi-directional transmits, adopt out-band method to transmit the basis of IEEE1588V2, the light of monitoring and controlling channels optical wavelength is received and dispatched all in an optical fiber, avoid the asymmetric of transmitting-receiving path, guaranteed the delay consistency of transmitting-receiving.
For reaching above object, the invention provides a kind of OTN system of supporting that monitoring and controlling channels light single fiber bi-directional transmits, comprise upstream stations and the downstream website of mutual transmission business light, each website inside is equipped with two Optical Amplifier Units and an Optical Supervisory Channel unit, each website also comprise one close partial wave unit, this closes partial wave unit and comprises optical circulator and channel join-splitting device, the output of Optical Supervisory Channel unit is connected with a words mouthful light path on optical circulator, the public port of optical circulator is connected with described channel join-splitting device light path, under optical circulator, words mouthful are connected with the input light path of Optical Supervisory Channel unit, the channel join-splitting device of two websites connects by two optical fiber, the monitoring and controlling channels light that comprises two-way transmission in an optical fiber and forward business light, and another root optical fibre packages is containing reverse traffic light.
On the basis of technique scheme, two Optical Amplifier Units of described upstream stations are divided into the forward transmission amplifying unit that sends forward business light, and the reverse reception amplifying unit of reception reverse traffic light, forward sends amplifying unit and is connected with the channel join-splitting device light path of upstream stations; Two Optical Amplifier Units of described downstream website are divided into the forward reception amplifying unit that receives forward business light, and send the reverse transmission amplifying unit of reverse traffic light, and forward receives amplifying unit and is connected with the channel join-splitting device light path of downstream website.
A kind of method that the present invention also provides support monitoring and controlling channels light single fiber bi-directional based on said system to transmit, after the light amplification of forward business, enter upstream stations and close partial wave unit, with after the bidirectional monitoring channel light of this website optical circulator merges, mail to downstream website by an optical fiber; The business light that transfers to downstream website is separated by the partial wave unit that closes of this website, export to the Optical Amplifier Unit being connected with channel join-splitting device in this website, two-way monitoring and controlling channels light is isolated the light of two different directions by optical circulator, light path is connected to input port and the delivery outlet of this website Optical Supervisory Channel unit respectively; Upstream stations receives the business light from downstream website according to the same manner.
On the basis of technique scheme, described reverse traffic light is after the Optical Amplifier Unit not being connected with channel join-splitting device in the website of downstream amplifies, an Optical Amplifier Unit output by an independent Optical Fiber Transmission to upstream stations, and this Optical Amplifier Unit is not connected with the channel join-splitting device of this website.
The present invention also provides another to support the OTN system that monitoring and controlling channels light single fiber bi-directional transmits, comprise upstream stations and the downstream website of mutual transmission business light, each website inside is equipped with two Optical Amplifier Units and an Optical Supervisory Channel unit, each website also comprises an Optical Line Protection unit, in Optical Line Protection unit, be provided with and close partial wave unit, close partial wave unit and comprise optical circulator and channel join-splitting device, the output of Optical Supervisory Channel unit is connected with a words mouthful light path on optical circulator, the public port of optical circulator is connected with described channel join-splitting device light path, under optical circulator, words mouthful are connected with the input light path of Optical Supervisory Channel unit, the channel join-splitting device of described upstream stations connects a coupler, and the channel join-splitting device of downstream website connects an optical switch, and described coupler is connected with an extension wire optical fiber by a main line optical fiber with optical switch.
On the basis of technique scheme, two Optical Amplifier Units of described upstream stations are divided into the forward transmission amplifying unit that sends forward business light, and the reverse reception amplifying unit of reception reverse traffic light, forward sends amplifying unit and is connected with the channel join-splitting device light path of this website; Two Optical Amplifier Units of described downstream website are divided into the forward reception amplifying unit that receives forward business light, and send the reverse transmission amplifying unit of reverse traffic light, and forward receives amplifying unit and is connected with the channel join-splitting device light path of this website.
On the basis of technique scheme, described upstream stations also comprises an optical switch, oppositely receives amplifying unit and is connected with described optical switch light path; Described downstream website also comprises a coupler, and the reverse transmission amplifying unit of downstream website is connected with the coupler light path of this website; Between the coupler of the optical switch of described upstream stations and downstream website, connect by active and standby circuit optical fiber.
On the basis of technique scheme, described optical switch is 2 × 2 optical switches, and described coupler is 1:2 coupler, and described optical switch also connects an optical power detector.
A kind of method that the present invention also provides support monitoring and controlling channels light single fiber bi-directional based on described system to transmit, forward business light after amplification with through the bidirectional monitoring channel light of circulator after channel join-splitting device merges, output to optical coupler, be distributed on the active and standby circuit optical fiber of forward; At downstream website, optical switch connects an optical power detector, active and standby circuit light is after optical switch is selected, optical power detector is received on one tunnel, a road is received in channel join-splitting device business light is separated with monitoring and controlling channels light, isolated business light outputs to the Optical Amplifier Unit of this website, and isolated monitoring and controlling channels light light path after circulator is connected to the Optical Supervisory Channel unit of this website; Described upstream stations receives the business light from downstream website according to the same manner.
On the basis of technique scheme, described upstream stations also comprises an optical switch, oppositely receives amplifying unit and is connected with described optical switch light path, and optical switch also connects an optical power detector; Described downstream website also comprises a coupler, and the reverse transmission amplifying unit of downstream website is connected with the coupler light path of this website; Between the coupler of the optical switch of described upstream stations and downstream website, connect by active and standby circuit optical fiber, described opposite direction business light is distributed in reciprocal active and standby fibre circuit through the optical coupler that is amplified into downstream website, after arriving upstream stations, selected by this website optical switch, one tunnel business light enters this website optical power detector, and a road outputs to the Optical Amplifier Unit of this website.
Beneficial effect of the present invention is: adopted the not Optical Supervisory Channel of bearer service signal to transmit IEEE1588V2, do not had the delay variation of introducing on bearing mode.By the OTN network settings optical circulator to traditional, become the load mode of single fiber bi-directional, thereby avoided the asymmetric of business transmitting-receiving path, and on the window wavelength of bearer service without any impact.
Brief description of the drawings
Fig. 1 is the single fiber bi-directional OTN system light path figure of first embodiment of the invention business transmitting-receiving path symmetry;
Fig. 2 is the schematic diagram that closes partial wave unit of first embodiment of the invention middle and upper reaches website;
Fig. 3 is the single fiber bi-directional OTN system light path figure of second embodiment of the invention business transmitting-receiving path symmetry;
Fig. 4 is the more system light path figure of detailed structure of Fig. 3.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in further detail.
The first embodiment:
As depicted in figs. 1 and 2, support the OTN system that monitoring and controlling channels light single fiber bi-directional transmits, comprise upstream stations and the downstream website of mutual transmission business light, each website inside is equipped with two OA(optical amplifier, Optical Amplifier Unit) and an Optical Supervisory Channel unit (OSC), each website also comprise one close partial wave unit (OSC AD), described in close partial wave unit and comprise an optical circulator and a channel join-splitting device.The output of Optical Supervisory Channel unit is connected with a words mouthful light path on optical circulator, and the public port of optical circulator is connected with described channel join-splitting device light path, and under optical circulator, words mouthful are connected with the input light path of Optical Supervisory Channel unit.Two OA of described upstream stations are divided into the forward transmission OA that sends forward business light, and receive the reverse reception OA of reverse traffic light, and forward sends OA and is connected with the channel join-splitting device light path of upstream stations.Two OA of described downstream website are divided into the forward reception OA that receives forward business light, and send the reverse transmission OA of reverse traffic light, and forward receives OA and is connected with the channel join-splitting device light path of downstream website.The channel join-splitting device of described two websites connects by two optical fiber, the monitoring and controlling channels light that comprises two-way transmission in an optical fiber and forward business light, and another root optical fibre packages is containing reverse traffic light.In the present embodiment, business light is 1550nm window wavelength light, and the Optical Supervisory Channel light of Optical Supervisory Channel unit is 1510nm wavelength light.
The present invention supports the method that monitoring and controlling channels light single fiber bi-directional transmits, forward business light sends after OA amplification via forward, enter upstream stations and close partial wave unit, with after the bidirectional monitoring channel light of this website optical circulator merges, mail to downstream website by an optical fiber.At downstream website, the business light that transfers to downstream website is separated by the partial wave unit that closes of this website, the forward of exporting to this website receives OA, two-way monitoring and controlling channels light is isolated the light of two different directions by optical circulator, be connected respectively to input port and the delivery outlet of this website Optical Supervisory Channel unit.Owing to sending between upstream stations and downstream website, the mode of business light is identical, is only opposite direction, therefore downstream stations point in the same way upstream website send business light, upstream stations receives the business light from downstream website according to the same manner.
In the present embodiment, the sending and receiving of the business light of 1510nm wavelength are all in same optical fiber, completely with path for the IEEE1588V2 of carrying, so just there will not be the asymmetric situation of sending and receiving, guarantee the time synchronized between upstream and downstream website, in balanced situation, also can not have very high precision.
The second embodiment:
As shown in Figure 3 and Figure 4, support the OTN system that monitoring and controlling channels light single fiber bi-directional transmits to adopt 1+1 protection mode in the present embodiment, i.e. concurrent choosing is received.The present embodiment comprises upstream stations and the downstream website of mutual transmission business light equally, each website inside is equipped with two OA and an Optical Supervisory Channel unit, each website also comprises an Optical Line Protection unit (OLP, Optical Fiber Line Auto Switch Protection Equipment), in Optical Line Protection unit, be provided with and close partial wave unit (OSC AD), close partial wave unit and comprise optical circulator and channel join-splitting device, the output of Optical Supervisory Channel unit is connected with a words mouthful light path on optical circulator, the public port of optical circulator is connected with described channel join-splitting device light path, under optical circulator, words mouthful are connected with the input light path of Optical Supervisory Channel unit, the channel join-splitting device of described upstream stations connects a coupler, the connected optical switch of channel join-splitting device light path of downstream website, and described coupler is connected with an extension wire optical fiber by a main line optical fiber with optical switch.
Two light OA of described upstream stations are divided into the forward transmission OA that sends forward business light, and receive the reverse reception OA of reverse traffic light, and forward sends OA and is connected with the channel join-splitting device light path of this website.Two OA of described downstream website are divided into the forward reception OA that receives forward business light, and send the reverse transmission OA of reverse traffic light, and forward receives OA and is connected with the channel join-splitting device light path of this website.
Described upstream stations also comprises an optical switch, oppositely receives OA and is connected with described optical switch light path; Described downstream website also comprises a coupler, and the reverse transmission OA of downstream website is connected with the coupler light path of this website; Between the coupler of the optical switch of described upstream stations and downstream website, connect by active and standby circuit optical fiber.In the present embodiment; described optical switch is 2 × 2 optical switches; do not shown by the CPU(figure in Optical Line Protection unit, place) control; each optical switch connects an optical power detector; described coupler is 1:2 coupler; business light is 1550nm window wavelength light, and Optical Supervisory Channel light is 1510nm wavelength light.
In the present embodiment, the method of supporting monitoring and controlling channels light single fiber bi-directional to transmit is: forward business light sends through forward after OA amplification in upstream stations, merge through channel join-splitting device with the bidirectional monitoring channel light through this website circulator, be incorporated to an optical fiber, output to again the light splitting that optical coupler carries out 50:50, be distributed on the active and standby circuit optical fiber of forward.At downstream website, active and standby circuit light, after optical switch is selected, does not choose Yi road light to receive optical power detector; Choose Yi road light to receive in channel join-splitting device business light is separated with monitoring and controlling channels light, isolated business light outputs to the Optical Amplifier Unit of this website, output after amplifying.Isolated monitoring and controlling channels light, after circulator separates, is given to respectively receipts light mouth and the light outlets of the Optical Supervisory Channel unit of this website.Owing to sending between upstream stations and downstream website, the mode of business light is identical, is only opposite direction, therefore downstream stations point in the same way upstream website send business light, upstream stations receives the business light from downstream website according to the same manner.
Described opposite direction business light after reverse transmission OA amplifies, enters the Optical Line Protection unit of downstream website at downstream website, after the light splitting of 50:50 optical coupler, in active and standby fibre circuit, and is sent to upstream stations.Arrive after upstream stations, selected by this website optical switch, choose a road business light and output to other unit through oppositely receiving after OA amplifies, another road business light enters this website optical power detector.
Upstream stations, in the active and standby circuit optical fiber of downstream website, includes the 1510nm monitoring and controlling channels light that 1550nm business light and two websites are defended the doctrine, and has carried IEEE1588V2 on 1510nm wavelength monitor channel.At downstream website in the active and standby circuit optical fiber of upstream stations; the business light Optical Line Protection unit (OLP) that only has 1550nm wavelength judges the quality of fibre circuit and completes switching action according to luminous power performance, also guarantees that the transmitting-receiving of 1510nm wavelength light carries out in same optical fiber simultaneously.
The present invention is not limited to above-mentioned execution mode, for those skilled in the art, under the premise without departing from the principles of the invention, can also make some improvements and modifications, within these improvements and modifications are also considered as protection scope of the present invention.The content not being described in detail in this specification belongs to the known prior art of professional and technical personnel in the field.
Claims (10)
1. an OTN system of supporting that monitoring and controlling channels light single fiber bi-directional transmits, comprise upstream stations and the downstream website of mutual transmission business light, each website inside is equipped with two Optical Amplifier Units and an Optical Supervisory Channel unit, it is characterized in that: each website also comprise one close partial wave unit, this closes partial wave unit and comprises optical circulator and channel join-splitting device, the output of Optical Supervisory Channel unit is connected with a words mouthful light path on optical circulator, the public port of optical circulator is connected with described channel join-splitting device light path, under optical circulator, words mouthful are connected with the input light path of Optical Supervisory Channel unit, the channel join-splitting device of two websites connects by two optical fiber, the monitoring and controlling channels light that comprises two-way transmission in an optical fiber and forward business light, and another root optical fibre packages is containing reverse traffic light.
2. the OTN system that support monitoring and controlling channels light single fiber bi-directional as claimed in claim 1 transmits, it is characterized in that: two Optical Amplifier Units of described upstream stations are divided into the forward transmission amplifying unit that sends forward business light, and the reverse reception amplifying unit of reception reverse traffic light, forward sends amplifying unit and is connected with the channel join-splitting device light path of upstream stations; Two Optical Amplifier Units of described downstream website are divided into the forward reception amplifying unit that receives forward business light, and send the reverse transmission amplifying unit of reverse traffic light, and forward receives amplifying unit and is connected with the channel join-splitting device light path of downstream website.
3. the method that the support monitoring and controlling channels light single fiber bi-directional based on system described in claim 1 transmits, it is characterized in that: after the light amplification of forward business, enter upstream stations and close partial wave unit, with after the bidirectional monitoring channel light of this website optical circulator merges, mail to downstream website by an optical fiber; The business light that transfers to downstream website is separated by the partial wave unit that closes of this website, export to the Optical Amplifier Unit being connected with channel join-splitting device in this website, two-way monitoring and controlling channels light is isolated the light of two different directions by optical circulator, light path is connected to input port and the delivery outlet of this website Optical Supervisory Channel unit respectively; Upstream stations receives the business light from downstream website according to the same manner.
4. the method transmitting based on support monitoring and controlling channels light single fiber bi-directional claimed in claim 3, it is characterized in that: described reverse traffic light is after the Optical Amplifier Unit not being connected with channel join-splitting device in the website of downstream amplifies, an Optical Amplifier Unit output by an independent Optical Fiber Transmission to upstream stations, and this Optical Amplifier Unit is not connected with the channel join-splitting device of this website.
5. an OTN system of supporting that monitoring and controlling channels light single fiber bi-directional transmits, comprise upstream stations and the downstream website of mutual transmission business light, each website inside is equipped with two Optical Amplifier Units and an Optical Supervisory Channel unit, it is characterized in that: each website also comprises an Optical Line Protection unit, in Optical Line Protection unit, be provided with and close partial wave unit, close partial wave unit and comprise optical circulator and channel join-splitting device, the output of Optical Supervisory Channel unit is connected with a words mouthful light path on optical circulator, the public port of optical circulator is connected with described channel join-splitting device light path, under optical circulator, words mouthful are connected with the input light path of Optical Supervisory Channel unit, the channel join-splitting device of described upstream stations connects a coupler, and the channel join-splitting device of downstream website connects an optical switch, and described coupler is connected with an extension wire optical fiber by a main line optical fiber with optical switch.
6. the OTN system that support monitoring and controlling channels light single fiber bi-directional as claimed in claim 5 transmits, it is characterized in that: two Optical Amplifier Units of described upstream stations are divided into the forward transmission amplifying unit that sends forward business light, and the reverse reception amplifying unit of reception reverse traffic light, forward sends amplifying unit and is connected with the channel join-splitting device light path of this website; Two Optical Amplifier Units of described downstream website are divided into the forward reception amplifying unit that receives forward business light, and send the reverse transmission amplifying unit of reverse traffic light, and forward receives amplifying unit and is connected with the channel join-splitting device light path of this website.
7. the OTN system that support monitoring and controlling channels light single fiber bi-directional as claimed in claim 6 transmits, is characterized in that: described upstream stations also comprises an optical switch, oppositely receives amplifying unit and is connected with described optical switch light path; Described downstream website also comprises a coupler, and the reverse transmission amplifying unit of downstream website is connected with the coupler light path of this website; Between the coupler of the optical switch of described upstream stations and downstream website, connect by active and standby circuit optical fiber.
8. the OTN system that the support monitoring and controlling channels light single fiber bi-directional as described in claim 5,6 or 7 transmits, is characterized in that: described optical switch is 2 × 2 optical switches, described coupler is 1:2 coupler, and described optical switch also connects an optical power detector.
9. the method that the support monitoring and controlling channels light single fiber bi-directional based on system described in claim 5 transmits, it is characterized in that: forward business light after amplification with through the bidirectional monitoring channel light of circulator after channel join-splitting device merges, output to optical coupler, be distributed on the active and standby circuit optical fiber of forward; At downstream website, optical switch connects an optical power detector, active and standby circuit light is after optical switch is selected, optical power detector is received on one tunnel, a road is received in channel join-splitting device business light is separated with monitoring and controlling channels light, isolated business light outputs to the Optical Amplifier Unit of this website, and isolated monitoring and controlling channels light light path after circulator is connected to the Optical Supervisory Channel unit of this website; Described upstream stations receives the business light from downstream website according to the same manner.
10. the method transmitting based on support monitoring and controlling channels light single fiber bi-directional claimed in claim 9, it is characterized in that: described upstream stations also comprises an optical switch, oppositely receive amplifying unit and be connected with described optical switch light path, optical switch also connects an optical power detector; Described downstream website also comprises a coupler, and the reverse transmission amplifying unit of downstream website is connected with the coupler light path of this website; Between the coupler of the optical switch of described upstream stations and downstream website, connect by active and standby circuit optical fiber, described opposite direction business light is distributed in reciprocal active and standby fibre circuit through the optical coupler that is amplified into downstream website, after arriving upstream stations, selected by this website optical switch, one tunnel business light enters this website optical power detector, and a road outputs to the Optical Amplifier Unit of this website.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410063981.4A CN103840906B (en) | 2014-02-25 | 2014-02-25 | OTN system and method supporting supervisory channel light single-optical-fiber bidirectional transmission |
| RU2016100225A RU2642473C1 (en) | 2014-02-25 | 2014-09-23 | Otn system and method of supporting bidirectional transmission of light from optical supervisory channel on one fiber |
| MYPI2016701518A MY176928A (en) | 2014-02-25 | 2014-09-23 | Otn system and method for supporting single-fiber bidirectional transmission of supervisory channel light |
| PCT/CN2014/087159 WO2015127780A1 (en) | 2014-02-25 | 2014-09-23 | Otn system and method for supporting single-fiber bidirectional transmission of supervisory channel light |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410063981.4A CN103840906B (en) | 2014-02-25 | 2014-02-25 | OTN system and method supporting supervisory channel light single-optical-fiber bidirectional transmission |
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| Publication Number | Publication Date |
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| CN103840906A true CN103840906A (en) | 2014-06-04 |
| CN103840906B CN103840906B (en) | 2017-01-25 |
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| CN201410063981.4A Active CN103840906B (en) | 2014-02-25 | 2014-02-25 | OTN system and method supporting supervisory channel light single-optical-fiber bidirectional transmission |
Country Status (4)
| Country | Link |
|---|---|
| CN (1) | CN103840906B (en) |
| MY (1) | MY176928A (en) |
| RU (1) | RU2642473C1 (en) |
| WO (1) | WO2015127780A1 (en) |
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| WO2015127780A1 (en) * | 2014-02-25 | 2015-09-03 | 烽火通信科技股份有限公司 | Otn system and method for supporting single-fiber bidirectional transmission of supervisory channel light |
| CN105790966A (en) * | 2014-12-18 | 2016-07-20 | 中兴通讯股份有限公司 | Node interleaving searching method and device |
| CN109962735A (en) * | 2019-03-11 | 2019-07-02 | 烽火通信科技股份有限公司 | The adaptation method and system of optical power parameter |
| CN111935566A (en) * | 2020-09-17 | 2020-11-13 | 南京嘉环科技股份有限公司 | OLP channel protection switching system and switching method based on OTN redundant waves |
| WO2021208534A1 (en) * | 2020-04-17 | 2021-10-21 | 烽火通信科技股份有限公司 | Single-fiber bidirectional osc implementation method and device for wavelength division system |
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| US10148386B2 (en) | 2016-09-16 | 2018-12-04 | International Business Machines Corporation | Multichannel optical transceiver for matching data traffic classes to channel numbers |
| US10148356B2 (en) | 2016-09-16 | 2018-12-04 | International Business Machines Corporation | Data transfer over bi-directional links leveraging counter-propagating back channel for low-latency responses |
| CN113115131A (en) * | 2019-12-25 | 2021-07-13 | 迈普通信技术股份有限公司 | Device and method for realizing single-fiber transmission and device and method for realizing single-fiber reception |
| CN112953641B (en) * | 2021-02-09 | 2022-03-18 | 长飞光纤光缆股份有限公司 | OPEN-WDM device and control method |
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- 2014-09-23 WO PCT/CN2014/087159 patent/WO2015127780A1/en not_active Ceased
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| US20020141010A1 (en) * | 2001-03-16 | 2002-10-03 | Dave Rodgers | Coupled data and wavelength reference for optical performance monitoring in fiber optic systems |
| CN1819502A (en) * | 2006-03-10 | 2006-08-16 | 北京澍龙科技开发有限公司 | Wave-length controlling circuit of light communication wavelength division multiplexing |
| CN101369848A (en) * | 2008-10-17 | 2009-02-18 | 烽火通信科技股份有限公司 | Method for monitoring optical transmission network multiplex section and optical passage signal quality |
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| WO2015127780A1 (en) * | 2014-02-25 | 2015-09-03 | 烽火通信科技股份有限公司 | Otn system and method for supporting single-fiber bidirectional transmission of supervisory channel light |
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| CN105790966B (en) * | 2014-12-18 | 2020-02-04 | 中兴通讯股份有限公司 | Node cross search method and device |
| CN109962735A (en) * | 2019-03-11 | 2019-07-02 | 烽火通信科技股份有限公司 | The adaptation method and system of optical power parameter |
| WO2021208534A1 (en) * | 2020-04-17 | 2021-10-21 | 烽火通信科技股份有限公司 | Single-fiber bidirectional osc implementation method and device for wavelength division system |
| CN111935566A (en) * | 2020-09-17 | 2020-11-13 | 南京嘉环科技股份有限公司 | OLP channel protection switching system and switching method based on OTN redundant waves |
| CN114374429A (en) * | 2021-12-08 | 2022-04-19 | 武汉光迅科技股份有限公司 | C + + band EDFA device with single-fiber bidirectional OSC |
| CN114374429B (en) * | 2021-12-08 | 2023-07-04 | 武汉光迅科技股份有限公司 | C++ band EDFA device with single-fiber bidirectional OSC |
Also Published As
| Publication number | Publication date |
|---|---|
| MY176928A (en) | 2020-08-27 |
| RU2642473C1 (en) | 2018-01-25 |
| CN103840906B (en) | 2017-01-25 |
| WO2015127780A1 (en) | 2015-09-03 |
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