CN101931486A - Optical fiber line warning door line protection method of wavelength division system - Google Patents
Optical fiber line warning door line protection method of wavelength division system Download PDFInfo
- Publication number
- CN101931486A CN101931486A CN2009100709888A CN200910070988A CN101931486A CN 101931486 A CN101931486 A CN 101931486A CN 2009100709888 A CN2009100709888 A CN 2009100709888A CN 200910070988 A CN200910070988 A CN 200910070988A CN 101931486 A CN101931486 A CN 101931486A
- Authority
- CN
- China
- Prior art keywords
- insertion loss
- main
- luminous power
- fibre core
- standby
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Optical Communication System (AREA)
Abstract
The invention relates to an optical fiber line warning door line protection method of a wavelength division system, which concretely comprises the following steps of: subtracting the receiving optical power of a local terminal optical protection unit from the optical power of the transmitting port of a paired optical protection unit to obtain the line insertion loss value of a fiber core, and sequentially detecting the line insertion loss values of a main fiber core and a spare fiber core; wherein the line insertion losses are adopted as switching criterions which comprise two switching criterions, one switching criterion is the criterion for switching from a main line to a spare line and comprises the conditions that the line insertion loss value of any fiber core of a main fiber exceeds the set switching threshold value of the line insertion loss, and the line insertion loss values of two spare fiber cores are both above the set warning threshold of the line insertion loss; and the other switching criterion is the criterion for switching from the spare lines to the main line and comprises the conditions that the line insertion loss of any spare fiber core in the two spare fiber cores exceeds the set switching threshold, and the line insertion loss mean value of the two fiber cores is above the set warning threshold. The invention adopts the line insertion loss as the switching criterion for the line protection of the wavelength division system and effectively solves the difficult problem on multi-span section protection of the wavelength division system.
Description
Technical field
The present invention relates to a kind of fibre circuit guard method.Particularly relate to a kind of optical fiber cable line warning door guard method that can solve the wavelength-division system of wavelength-division system multi-span protection effectively.
Background technology
Usually the protection of wavelength-division system adopts the mode of multiplex section Cheng Huan to protect, but this protected mode cost is very high, therefore normally chain, especially a main line of most of wavelength-division systems.Adopt the mode of fibre circuit automatic switching protection more effective for this circuit, and use more and more general.The technology that adopts is at present, when main optical power down with optical fiber, promptly triggers change action, makes the light protection system switch to alternate routing.This mode is applied in the protection of wavelength-division system and has many difficulties, and weak point is mainly reflected on the transfer criterion.
Typical wavelength-division system is protected engineering as shown in Figure 1, and two ends are that wavelength division multiplexing (OTM) is stood, and the centre is that light amplification (OA) is stood, and the section of striding number does not wait.Between middle OTM and the OA, between OA and the OA, all get involved the light protected location.When wherein one section block; the OA of whole wavelength-division system will close; therefore each light protected location all can be received the information of optical power down; thereby trigger the switching action of light protected location; cause all the light protected locations between the whole OTM-OTM to be switched; cause and switch confusion, even cause that system is irrecoverable.
Summary of the invention
Technical problem to be solved by this invention is; provide a kind of with the transfer criterion of circuit Insertion Loss as the wavelength-division system route protection; rather than only with the luminous power of receiving terminal as transfer criterion, thereby the optical fiber cable line warning door guard method that can solve the wavelength-division system of wavelength-division system multi-span protection effectively.
The technical solution adopted in the present invention is: a kind of optical fiber cable line warning door guard method of wavelength-division system, be to adopt the circuit Insertion Loss as transfer criterion, it is to calculate according to the luminous power of each port of light protected location to obtain that described circuit is inserted, it specifically is the received optical power that deducts local terminal light protected location with the luminous power of the emission port of pairing light protected location, obtain the circuit Insertion Loss value of this root fibre core, detect main circuit Insertion Loss value successively with fibre core and standby fibre core according to above-mentioned account form; Described employing circuit Insertion Loss comprises two transfer criterions as transfer criterion, one is the main criterion that switches to extension wire with circuit: use fine any fibre core circuit Insertion Loss value to surpass the handoff threshold value of the circuit Insertion Loss of setting when main, and the circuit Insertion Loss value of two standby fibre cores is all on the alarming threshold of the circuit Insertion Loss of setting; Another is that extension wire switches to main criterion with circuit: any standby fibre core circuit Insertion Loss surpasses the handoff threshold of setting in two standby fibre cores, and main circuit Insertion Loss average with two fibre cores is on the alarming threshold of setting.
The luminous power of described pairing end light protected location is to inform local terminal light protected location by the mode of a communication or a message, specifically adopts standby fibre core communication or main with communication or wireless communications portal in the band of fibre core.
The alarming threshold of described circuit Insertion Loss and handoff threshold are to set in advance reference value in light protected location inside by external interface; adopt circuit Insertion Loss value that protected transmission system can bear as handoff threshold; alarming threshold then on handoff threshold, plays a part to give warning in advance.
The luminous power of described each port is that each protected location carries out luminous power voluntarily and detects and to obtain.
The optical fiber cable line warning door guard method of described wavelength-division system comprises the steps:
1) sets the alarming threshold P that protected system allows
AlarmWith handoff threshold P
Switch
2) the light protected location is gathered the luminous power of each optical port, two protected system equipment ports, and two masters use the fibre core port, two standby fibre core ports, totally 6 ports, the luminous power of being gathered is labeled as P respectively
Tx, P
Rx, P
T1, P
R1, P
T2, P
R2
3) by extension wire, the luminous power of local terminal is passed to the other end;
4) Insertion Loss of every fibre of calculating:
First main Insertion Loss: the P with fibre core
1 T1-P
2 R1
Second main Insertion Loss: the P with fibre core
2 T1-P
1 R1
The Insertion Loss of the first standby fibre core: P
1 T2-P
2 R2
The Insertion Loss of the second standby fibre core: P
2 T2-P
1 R2
Wherein: P
1 T1The main luminous power of using of expression left end OLP equipment;
P
1 T2The standby luminous power of expression left end OLP equipment;
P
1 R1Main the using of expression left end OLP equipment received luminous power;
P
1 R2The standby receipts luminous power of expression left end OLP equipment;
P
2 T1The main luminous power of using of expression right-hand member OLP equipment;
P
2 T2The standby luminous power of expression right-hand member OLP equipment;
P
2 R1Main the using of expression right-hand member OLP equipment received luminous power;
P
2 R2The standby receipts luminous power of expression right-hand member OLP equipment;
5) set up criterion:
(1) the main condition that switches to extension wire with circuit is: when main with any main circuit Insertion Loss value that surpasses handoff threshold and two standby fibre cores with fibre core circuit Insertion Loss value in the fibre core all on alarming threshold, promptly satisfy condition:
P
1 T1-P
2 R1＜P
switch?or?P
2 T1-P
1 R1＜P
switch
P
1 T2-P
2 R2＞P
alarm?and?P
2 T2-P
1 R2＞P
alarm；
(2) extension wire switches to main condition with circuit and is: any standby fibre core circuit Insertion Loss value surpasses the main circuit Insertion Loss value with fibre cores of handoff threshold and two all on alarming threshold in standby fibre core, promptly satisfies condition:
P
1 T2-P
2 R2＜P
switch?or?P
2 T2-P
1 R2＜P
switch
P
1 T1-P
2 R1＞P
alarm?and?P
2 T1-P
1 R1＞P
alarm。
The transfer criterion of circuit Insertion Loss as the wavelength-division system route protection adopted in the optical fiber cable line warning door guard method of wavelength-division system of the present invention, has following characteristics:
(1) avoided leading portion to switch causing the cascade that back segment is switched to switch problem, a difficult problem is switched in the cascade that has solved the protection of wavelength-division system multi-span.
(2) ripple up and down of wavelength-division system causes that receiving terminal gets luminous power and changes, and simply adopts luminous power as criterion, can cause that abnormal mistake switches, and adopts the present invention can avoid mistake to switch.
(3) adopt the circuit Insertion Loss as criterion, can be easy to determine whether optical fiber is blocked, thereby guaranteed the reliability that the wavelength-division system protection is switched.
(4) adopt the extension wire Insertion Loss as assistant criteria simultaneously, can guarantee that wavelength-division system switches to the stable operation of extension wire energy, thereby guarantee the validity that the wavelength-division system protection is switched.
Description of drawings
Fig. 1 is the schematic diagram of wavelength-division system cascade protection when adopting luminous power to judge;
Fig. 2 is a system schematic of the present invention;
Fig. 3 is the schematic diagram of wavelength-division system cascade protection when adopting the present invention to judge.
Fig. 4 is the second embodiment of the present invention.
Wherein:
1: left end OLP equipment 2: right-hand member OLP equipment
The master used optical fiber with 4: the second masters of optical fiber in 3: the first
6: the second standby optical fiber of 5: the first standby optical fiber
The a:OTM b that stands: fiber optic protection unit
The c:OA station
Embodiment
Below in conjunction with the embodiment accompanying drawing optical fiber cable line warning door guard method of wavelength-division system of the present invention is explained.
As shown in Figure 2; the optical fiber cable line warning door guard method of wavelength-division system of the present invention; be to adopt the circuit Insertion Loss as transfer criterion; described circuit insert to be to calculate according to the luminous power of each port of light protected location and to obtain, and the luminous power of described each port is that each protected location carries out luminous power voluntarily and detects and obtain.Specifically be the received optical power that deducts local terminal light protected location with the luminous power of the emission port of pairing light protected location, obtain the circuit Insertion Loss value of this root fibre core, detect main circuit Insertion Loss value successively with fibre core and standby fibre core according to above-mentioned account form; The luminous power of described pairing end light protected location is to inform local terminal light protected location by the mode of a communication or a message, specifically adopts standby fibre core communication or main with communication or wireless communications portal in the band of fibre core.
Described employing circuit Insertion Loss comprises two transfer criterions as transfer criterion, one is the main criterion that switches to extension wire with circuit: use fine any fibre core circuit Insertion Loss value to surpass the handoff threshold value of the circuit Insertion Loss of setting when main, and the circuit Insertion Loss value of two standby fibre cores is all on the alarming threshold of the circuit Insertion Loss of setting; Another is that extension wire switches to main criterion with circuit: any standby fibre core circuit Insertion Loss surpasses the handoff threshold of setting in two standby fibre cores, and main circuit Insertion Loss average with two fibre cores is on the alarming threshold of setting.
The alarming threshold of described circuit Insertion Loss and handoff threshold are to set in advance reference value in light protected location inside by external interface; adopt circuit Insertion Loss value that protected transmission system can bear as handoff threshold; alarming threshold then on handoff threshold, plays a part to give warning in advance.
The optical fiber cable line warning door guard method of wavelength-division system of the present invention comprises the steps:
1) sets the alarming threshold P that protected system allows
AlarmWith handoff threshold P
Switch
2) the light protected location is gathered the luminous power of each optical port, two protected system equipment ports, and two masters use the fibre core port, two standby fibre core ports, totally 6 ports, the luminous power rate of being gathered is labeled as P respectively
Tx, P
Rx, P
T1, P
R1, P
T2, P
R2, as shown in Figure 2;
3) by extension wire, the luminous power of local terminal is passed to the other end;
4) Insertion Loss of every fibre of calculating:
First main Insertion Loss: the P with fibre core (3)
1 T1-P
2 R1
Second main Insertion Loss: the P with fibre core (4)
2 T1-P
1 R1
The Insertion Loss of the first standby fibre core (5): P
1 T2-P
2 R2
The Insertion Loss of the second standby fibre core (6): P
2 T2-P
1 R2
Wherein: P
1 T1The main luminous power of using of expression left end OLP equipment (1);
P
1 T2The standby luminous power of expression left end OLP equipment (1);
P
1 R1Main the using of expression left end OLP equipment (1) received luminous power;
P
1 R2The standby receipts luminous power of expression left end OLP equipment (1);
P
2 T1The main luminous power of using of expression right-hand member OLP equipment (2);
P
2 T2The standby luminous power of expression right-hand member OLP equipment (2);
P
2 R1Main the using of expression right-hand member OLP equipment (2) received luminous power;
P
2 R2The standby receipts luminous power of expression right-hand member OLP equipment (2);
5) set up criterion:
(1) the main condition that switches to extension wire with circuit is: when main with any main circuit Insertion Loss value that surpasses handoff threshold and two standby fibre cores with fibre core circuit Insertion Loss value in the fibre core all on alarming threshold, promptly satisfy condition:
P
1 T1-P
2 R1＜P
switch?or?P
2 T1-P
1 R1＜P
switch
P
1 T2-P
2 R2＞P
alarm?and?P
2 T2-P
1 R2＞P
alarm；
(2) extension wire switches to main condition with circuit and is: any standby fibre core circuit Insertion Loss value surpasses the main circuit Insertion Loss value with fibre cores of handoff threshold and two all on alarming threshold in standby fibre core, promptly satisfies condition:
P
1 T2-P
2 R2＜P
switch?or?P
2 T2-P
1 R2＜P
switch
P
1 T1-P
2 R1＞P
alarm?and?P
2 T1-P
1 R1＞P
alarm。
Embodiment one as shown in Figure 3; when first section D master of this wavelength-division system blocks with optical fiber; the light protected location detects the difference reduction of main luminous power with the luminous power of receiving port with fibre core emission light mouth; and standby fibre core Insertion Loss is normal; take place normally to switch; be that the business of transmission system is protected and recovered, i.e. this section Insertion Loss alarm switches.Though also detecting luminous power, reduces subsequent paragraph F, but because emission light mouth reduces synchronously with the luminous power that receives the light mouth, so the Insertion Loss of the fibre core of work at present is constant, do not reach the condition of transfer criterion, so need not to switch, thereby having avoided switching chaotic phenomenon takes place, guaranteed fail safe and the reliability switched, though i.e. subsequent paragraph luminous power alarm, the circuit Insertion Loss is normal, therefore need not to switch, working properly.
Embodiment two as shown in Figure 4, suppose that wavelength-division system has 4 ripples now, when according to the service dispatching needs 4 ripples being cut 3 ripples, the luminous power of whole system causes the receipts luminous power of whole wavelength-division circuit with decline 6dB, but because luminous power and received power descend synchronously, therefore the circuit Insertion Loss is constant, according to criterion A, does not satisfy switching condition, therefore need not to switch, avoid mistake to switch.Continue supposition, suppose that wavelength-division system is current and have only 1 ripple, need newly-increased 3 ripples, system's luminous power will increase 6dB, if the decay of 4～6dB takes place in circuit after a period of time, this may be fatal to wavelength-division system, only is transfer criterion with the received optical power, may cause the light protective device to switch and the risk that do not have to switch; And according to the present invention, neither can take place switch and the risk that do not switch based on the criterion of Insertion Loss, can not increase yet need be aperiodically according to the variation of circuit situation, the maintenance work of change handoff threshold.
Among Fig. 4:
D ' expression: end office (EO) cuts 3 ripples with 4 ripples, and system's luminous power will reduce by 6 dB;
F ' expression: though whole OTM section luminous power all with decline 6dB because luminous power and received power descend synchronously, so the circuit Insertion Loss is constant, therefore need not to switch, and avoids mistake to switch.
Claims (5)
1. the optical fiber cable line warning door guard method of a wavelength-division system, it is characterized in that, be to adopt the circuit Insertion Loss as transfer criterion, it is to calculate according to the luminous power of each port of light protected location to obtain that described circuit is inserted, it specifically is the received optical power that deducts local terminal light protected location with the luminous power of the emission port of pairing light protected location, obtain the circuit Insertion Loss value of this root fibre core, detect main circuit Insertion Loss value successively with fibre core and standby fibre core according to above-mentioned account form; Described employing circuit Insertion Loss comprises two transfer criterions as transfer criterion, one is the main criterion that switches to extension wire with circuit: use fine any fibre core circuit Insertion Loss value to surpass the handoff threshold value of the circuit Insertion Loss of setting when main, and the circuit Insertion Loss value of two standby fibre cores is all on the alarming threshold of the circuit Insertion Loss of setting; Another is that extension wire switches to main criterion with circuit: any standby fibre core circuit Insertion Loss surpasses the handoff threshold of setting in two standby fibre cores, and main circuit Insertion Loss average with two fibre cores is on the alarming threshold of setting.
2. the optical fiber cable line warning door guard method of wavelength-division system according to claim 1; it is characterized in that; the luminous power of described pairing end light protected location is to inform local terminal light protected location by the mode of a communication or a message, specifically adopts standby fibre core communication or main with communication or wireless communications portal in the band of fibre core.
3. the optical fiber cable line warning door guard method of wavelength-division system according to claim 1; it is characterized in that; the alarming threshold of described circuit Insertion Loss and handoff threshold are to set in advance reference value in light protected location inside by external interface; adopt circuit Insertion Loss value that protected transmission system can bear as handoff threshold; alarming threshold then on handoff threshold, plays a part to give warning in advance.
4. the optical fiber cable line warning door guard method of wavelength-division system according to claim 1 is characterized in that, the luminous power of described each port is that each protected location carries out luminous power voluntarily and detects and to obtain.
5. the optical fiber cable line warning door guard method of wavelength-division system according to claim 1 is characterized in that, comprises the steps:
1) sets the alarming threshold P that protected system allows
AlarmWith handoff threshold P
Switch
2) the light protected location is gathered the luminous power of each optical port, two protected system equipment ports, and two masters use the fibre core port, two standby fibre core ports, totally 6 ports, the luminous power of being gathered is labeled as P respectively
Tx, PR
x, P
T1, P
R1, P
T2, P
R2
3) by extension wire, the luminous power of local terminal is passed to the other end;
4) Insertion Loss of every fibre of calculating:
First main Insertion Loss: the P with fibre core (3)
1 T1-P
2 R1
Second main Insertion Loss: the P with fibre core (4)
2 T1-P
1 R1
The Insertion Loss of the first standby fibre core (5): P
1 T2-P
2 R2
The Insertion Loss of the second standby fibre core (6): P
2 T2-P
1 R2
Wherein: P
1 T1The main luminous power of using of expression left end OLP equipment (1);
P
1 T2The standby luminous power of expression left end OLP equipment (1);
P
1 R1Main the using of expression left end OLP equipment (1) received luminous power;
P
1 R2The standby receipts luminous power of expression left end OLP equipment (1);
P
2 T1The main luminous power of using of expression right-hand member OLP equipment (2);
P
2 T2The standby luminous power of expression right-hand member OLP equipment (2);
P
2 R1Main the using of expression right-hand member OLP equipment (2) received luminous power;
P
2 R2The standby receipts luminous power of expression right-hand member OLP equipment (2);
5) set up criterion:
(1) the main condition that switches to extension wire with circuit is: when main with any main circuit Insertion Loss value that surpasses handoff threshold and two standby fibre cores with fibre core circuit Insertion Loss value in the fibre core all on alarming threshold, promptly satisfy condition:
P
1 T1-P
2 R1＜P
switch?or?P
2 T1-P
1 R1＜P
switch
P
1 T2-P
2 R2＞P
alarm?and?P
2 T2-P
1 R2＞P
alarm；
(2) extension wire switches to main condition with circuit and is: any standby fibre core circuit Insertion Loss value surpasses the main circuit Insertion Loss value with fibre cores of handoff threshold and two all on alarming threshold in standby fibre core, promptly satisfies condition:
P
1 T2-P
2 R2＜P
switch?or P
2 T2-P
1 R2＜P
switch
P
1 T1-P
2 R1＞P
alarm?and P
2T
1-P
1 R1＞P
alarm。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910070988.8A CN101931486B (en) | 2009-10-27 | 2009-10-27 | Optical fiber line warning door line protection method of wavelength division system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910070988.8A CN101931486B (en) | 2009-10-27 | 2009-10-27 | Optical fiber line warning door line protection method of wavelength division system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101931486A true CN101931486A (en) | 2010-12-29 |
| CN101931486B CN101931486B (en) | 2014-12-31 |
Family
ID=43370431
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910070988.8A Active CN101931486B (en) | 2009-10-27 | 2009-10-27 | Optical fiber line warning door line protection method of wavelength division system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101931486B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102684810A (en) * | 2012-01-18 | 2012-09-19 | 徐志国 | Optical network protection method, optical link switching control device and optical link switching control system |
| CN104348541A (en) * | 2013-07-25 | 2015-02-11 | 中国移动通信集团湖北有限公司 | WDM light power early warning method and device |
| CN110086530A (en) * | 2019-04-15 | 2019-08-02 | 北京盟力星科技有限公司 | A kind of Cable's Fault alarm system |
| CN110995336A (en) * | 2019-11-15 | 2020-04-10 | 武汉光迅信息技术有限公司 | OLP transmission link switching method and device, storage medium and OLP |
| CN112350772A (en) * | 2020-10-23 | 2021-02-09 | 西安空间无线电技术研究所 | Method for testing waveguide by using insertion loss value |
| CN114826388A (en) * | 2022-04-19 | 2022-07-29 | 北京中昱光通科技有限公司 | Novel zero-insertion-loss OLP optical line protection switching monitoring method and device |
| CN115833927A (en) * | 2022-10-08 | 2023-03-21 | 中国电信股份有限公司 | Fiber core switching method and device, electronic equipment and storage medium |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1138358C (en) * | 2000-07-12 | 2004-02-11 | 信息产业部武汉邮电科学研究院 | Optical cable real time monitoring system |
| CN1256822C (en) * | 2002-08-30 | 2006-05-17 | 华为技术有限公司 | Light power automatic control method |
| CN100498267C (en) * | 2004-03-30 | 2009-06-10 | 华为技术有限公司 | Optical fiber fault automatic monitoring method |
| CN101252393B (en) * | 2008-04-01 | 2012-05-09 | 武汉光迅科技股份有限公司 | Optic cable automatic monitoring system with optical fiber automatic switch unit |
| CN201323583Y (en) * | 2008-12-12 | 2009-10-07 | 中国移动通信集团山东有限公司 | switching system of optical-fibre circuit and monitoring and switching device |
-
2009
- 2009-10-27 CN CN200910070988.8A patent/CN101931486B/en active Active
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102684810A (en) * | 2012-01-18 | 2012-09-19 | 徐志国 | Optical network protection method, optical link switching control device and optical link switching control system |
| CN102684810B (en) * | 2012-01-18 | 2015-07-22 | 徐志国 | Optical network protection method, optical link switching control device and optical link switching control system |
| CN104348541A (en) * | 2013-07-25 | 2015-02-11 | 中国移动通信集团湖北有限公司 | WDM light power early warning method and device |
| CN104348541B (en) * | 2013-07-25 | 2017-05-03 | 中国移动通信集团湖北有限公司 | WDM light power early warning method and device |
| CN110086530A (en) * | 2019-04-15 | 2019-08-02 | 北京盟力星科技有限公司 | A kind of Cable's Fault alarm system |
| CN110995336A (en) * | 2019-11-15 | 2020-04-10 | 武汉光迅信息技术有限公司 | OLP transmission link switching method and device, storage medium and OLP |
| WO2021093072A1 (en) * | 2019-11-15 | 2021-05-20 | 武汉光迅信息技术有限公司 | Switching method and apparatus of olp transmission link, storage medium and olp |
| CN112350772A (en) * | 2020-10-23 | 2021-02-09 | 西安空间无线电技术研究所 | Method for testing waveguide by using insertion loss value |
| CN114826388A (en) * | 2022-04-19 | 2022-07-29 | 北京中昱光通科技有限公司 | Novel zero-insertion-loss OLP optical line protection switching monitoring method and device |
| CN115833927A (en) * | 2022-10-08 | 2023-03-21 | 中国电信股份有限公司 | Fiber core switching method and device, electronic equipment and storage medium |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101931486B (en) | 2014-12-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101931486A (en) | Optical fiber line warning door line protection method of wavelength division system | |
| CN102136876B (en) | Light line protection acceleration circuit, light line protection system and method | |
| CN102932056B (en) | The method and apparatus of a kind of sensed light signal performance and diagnosis optical fiber link failure | |
| CN101854255B (en) | Method and system for protecting multiplex section in packet transport network | |
| US8873957B2 (en) | Logical-link management method and communication device | |
| CA2548960A1 (en) | System and method for the automatic setup of switched circuits based on traffic prediction in a telecommunications network | |
| JPH11205243A (en) | Automatic power stop system for optical transmission line | |
| CN104393914B (en) | A multiplex route recovering method for an optical fiber differential protection device | |
| CN101640818B (en) | Protection device and protection method of optical network | |
| CN102437875A (en) | Automatic optical fiber switching device for intensive wavelength division multiplexing system | |
| CN105915279A (en) | Method for triggering protection switching based on OTU alarm in WSON | |
| CN202334524U (en) | Optical link protecting system realizing single-end monitoring | |
| US20160127035A1 (en) | Optical network system | |
| CN115632703B (en) | Single-fiber bidirectional optical line protection system and optical line protection device | |
| CN110247700B (en) | Intelligent optical cable monitoring system and method with optical cable protection function | |
| CN105591688B (en) | A kind of optical fiber switch protecting system suitable for optical fiber switch protecting equipment | |
| CN101848034A (en) | Optical path protecting device and method | |
| CN100571078C (en) | Optical communication protection method | |
| CN103532794A (en) | Method for automatically switching stable control strategies based on warning signals of synchronous digital hierarchy equipment | |
| EP2806582B1 (en) | Alarm inhibition method and optical network device | |
| WO2012097611A1 (en) | Method and device for automatic protection switching in optical network | |
| CN101958751A (en) | Protection method and device of optical network | |
| CN209930259U (en) | Intelligent optical cable monitoring system with optical cable protection function | |
| CN101667863B (en) | Device and method for enhancing channel alarm triggering in multiplex section shared ring net protection | |
| JP6252476B2 (en) | Multi-failure optical node, optical communication system using the same, and wavelength path switching method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20160921 Address after: 430074 Wuhan, Hongshan Province District Road, Department of mail, No. 88 hospital Patentee after: Wuhan Accelink Technologies Co., Ltd. Address before: 430074 Wuhan, Hongshan Province District Road, Department of mail, No. 88 hospital Patentee before: Guangxun Science-Technology Co., Ltd., Wuhan |