CN101826917A - Optical line protection device and system - Google Patents
Optical line protection device and system Download PDFInfo
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- CN101826917A CN101826917A CN201010156051A CN201010156051A CN101826917A CN 101826917 A CN101826917 A CN 101826917A CN 201010156051 A CN201010156051 A CN 201010156051A CN 201010156051 A CN201010156051 A CN 201010156051A CN 101826917 A CN101826917 A CN 101826917A
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Abstract
The invention discloses an optical line protection device, which is arranged between a client-side optical fiber and a transmission protected side optical fiber of an optical line. The optical line protection device comprises an optical receiving module 101, an electric crossbar switch 102, an optical transceiver module 103 and an optical transceiver module 104. The optical receiving module 101 is connected with the client-side optical fiber; the optical transceiver module 103 and the optical transceiver module 104 are communicated with a main channel and a backup channel of the transmission protected side optical fiber; and the electric crossbar switch 102 is arranged between the optical receiving module 101 and the optical transceiver module 103 and the optical transceiver module 104 and is used for communicating the optical receiving module 101 with the optical transceiver module 103 or the optical transceiver module 104 according to the preset strategy. The invention also discloses an optical line protection system.
Description
Technical field
The present invention relates to technical field of optical fiber communication, particularly a kind of optical line protection device and system.
Background technology
Optical communication has been present topmost a kind of communication mode, along with wavelength division multiplexing (WDM, Wavelength Division Multiplexing), EPON (PON, Passive OpticalNetwork) development of multiple optical communication technique such as, optical communication equipment is come into building and family gradually, optical fiber also is taped against building (FTTB, Fiber to The Building) and family (FTTH, FiberTo The Home) by the backbone gradually.Volume of business and the kind meanwhile transmitted in optical fiber increase fast; the user requires also more and more higher to quality of optical fiber communication; therefore the reliability and the robustness demand of optical communication network are also more and more higher; the demand of fibre circuit protection is more and more, and the fiber optic protection demand is also then more and more urgent cheaply.
The protection that mainly is based on photosphere of fibre circuit protection commonly used at present.Single fiber bi-directional protection scheme interior lights line structure complexity by the optical device realization; Insertion Loss is bigger; be not suitable for the scale commercialization; the actual at present protected mode that adopts mainly contains two kinds 1: 1 (publishing receipts) and 1+1 (concurrent choosing receipts) protection, can be with reference to the statement of 4.4 joints in the communication industry standard " YD/T 1617.1-2007 intelligence light protection system part 1: Optical Line Protection system ".Two optical switch schemes are used in protection in 1: 1, trigger transmitting-receiving bidirectional according to link condition and switch synchronously; 1+1 protection then uses optical splitter to add the scheme of optical switch usually, and optical switch is positioned at receiving terminal, triggers optical switch according to link condition and realizes switching.The 1+1 of photosphere compares with 1: 1 protected mode respectively pluses and minuses, and the advantage of 1: 1 mode is that Insertion Loss is less, and alternate channel can be used for transmitting secondary service, is fit to the fiber optic protection of main line, and shortcoming is the cost height, switch the implementation complexity; 1+1 then cost is lower slightly, realizes simply, and the reliability height, shortcoming is that Insertion Loss is bigger.
In the prior art, mainly realize the fibre circuit protection by optical devices such as optical switch, optical splitter, photo-detectors.The protection based on photosphere by optical device is realized mainly contains following shortcoming:
1. the use of optical device causes cost higher, can not satisfy the low-cost demand of Access Network and metropolitan area network large scale deployment.
2. the optical switch switching time is slow, along with the raising of current operation quality requirement, switching time directly has influence on professional break period, and the mechanical optical switch switching time that is applied at present in the optical-fiber network is about 10 milliseconds, in the communication that some real-times are had relatively high expectations, can not meet the demands.
3. owing to be based on the protection of photosphere; do not have shaping again (Reshape), amplify (Reamplify) function again; and can bring the optical property damage; as bring extra insertion loss; Wavelength Dependent Loss; the deterioration of optical indexes such as channels crosstalk, and then cause transmission range to shorten, transmission performance descends.
Summary of the invention
In view of this, the present invention proposes a kind of optical line protection device and system, can switch by low-cost realization high speed business.
A kind of optical line protection device that the embodiment of the invention proposes, be arranged between the client's side optical fibers and protection transmission equipment side optical fiber of fibre circuit, this device comprises: optical transceiver module (101), electric cross bar switch (102), optical transceiver module (103) and optical transceiver module (104); Described optical transceiver module (101) is connected with client's side optical fibers; described optical transceiver module (103) and optical transceiver module (104) are respectively with the main channel of described protection transmission equipment side optical fiber be equipped with channel connection; described electric Cross module (102) is arranged between described optical transceiver module (101) and optical transceiver module (103) and optical transceiver module (101) and the optical transceiver module (104); be used for optical transceiver module (101) being communicated with respectively with described optical transceiver module (103) or optical transceiver module (104) according to the strategy that presets.
Preferably, this device comprises light transmit port Tx and the light-receiving port Rx that is used to connect client's side optical fibers, be used to connect main the transmit port T1 and the receiving port R1 of protection transmission equipment side, be used to connect the transmit port T2 and the receiving port R2 of the standby optical fiber of protecting transmission equipment side with optical fiber;
Described electric cross bar switch (102) comprises 6 external electrical interfaces (a～f), electrical interface (a) is connected optical transceiver module (101) with electrical interface (b), electrical interface (c) is connected optical transceiver module (103) with electrical interface (d), and electrical interface (e) is connected optical transceiver module (104) with electrical interface (f); First signal of telecommunication that receives by electrical interface (a) sends by electrical interface (c) and/or electrical interface (e); Electricity cross bar switch (102) sends by electrical interface (b) by second signal of telecommunication that electrical interface (d) or electrical interface (f) receive;
It is light signal that described optical transceiver module (101) is used for second electrical signal conversion from electrical interface (b), and by light transmit port Tx described light signal is sent to protected equipment; And will be converted to first signal of telecommunication, and described first signal of telecommunication is sent to electrical interface (a) by the light signal that light-receiving port Rx receives from protected equipment;
It is light signal that described optical transceiver module (103) is used for first electrical signal conversion from electrical interface (c), and by transmit port T1 described light signal is sent to the main optical fiber of using; And will be converted to second signal of telecommunication, and described second signal of telecommunication is sent to electrical interface (d) by the fine light signal of independently using up that receiving port R1 receives;
It is light signal that described optical transceiver module (104) is used for first electrical signal conversion from electrical interface (e), and by transmit port T2 described light signal is sent to standby optical fiber; And will be converted to second signal of telecommunication, and described second signal of telecommunication is sent to electrical interface (f) by the light signal that receiving port R2 receives from standby optical fiber.
Preferably, described electric cross bar switch (102) is 1 group 4 * 4 electric cross bar switch or 2 group 2 * 2 electric cross bar switch.
Preferably, described optical transceiver module (101), (103) and (104) are separate light receiving unit and light transmitting element, or the integrated module of optical transceiver, or the single fiber bi-directional optical transceiver module.
Preferably, described electric cross bar switch (102) is before switching, and first signal of telecommunication that receives by electrical interface (a) sends by electrical interface (c) and electrical interface (e); Electricity cross bar switch (102) sends by electrical interface (b) by second signal of telecommunication that electrical interface (d) receives;
Described electric cross bar switch (102) is after switching, and first signal of telecommunication that receives by electrical interface (a) sends by electrical interface (c) and electrical interface (e); Electricity cross bar switch (102) sends by electrical interface (b) by second signal of telecommunication that electrical interface (f) receives.
Preferably, described electric cross bar switch (102) is before switching, and first signal of telecommunication that receives by electrical interface (a) sends by electrical interface (c); Electricity cross bar switch (102) sends by electrical interface (b) by second signal of telecommunication that electrical interface (d) receives;
Described electric cross bar switch (102) is after switching, and first signal of telecommunication that receives by electrical interface (a) sends by electrical interface (e); Electricity cross bar switch (102) sends by electrical interface (b) by second signal of telecommunication that electrical interface (f) receives.
Preferably, optical transceiver module (103) is used to monitor and connects main receiving port R1 with optical fiber and received optical power whether occurs and lose alarm, if then trigger the described switching of electric cross bar switch 102 execution.
Preferably, optical line protection device further comprises the CDR module, is used for whether the monitoring connection is main the alarm of receiving optical signals losing lock occurs with optical fiber, if then trigger electric cross bar switch 102 and carry out described switching.
Preferably, optical line protection device further comprises framer, is used for monitoring and connects mainly the alarm of transfiniting of light error code whether to occur receiving with optical fiber, if then trigger the described switching of electric cross bar switch 102 execution.
Preferably, when the receiving port Rx of optical transceiver module (101) receives when unglazed, then the optical transmitting set of the transmit port T2 of the optical transmitting set of the transmit port T1 of optical transceiver module (103) and optical transceiver module (104) cuts out; The receiving port R2 of the receiving port R1 of optical transceiver module (103) or optical transceiver module (104) receives when unglazed, and the optical transmitting set that then will send the transmit port Tx of optical transceiver module (101) cuts out.
The embodiment of the invention also proposes a kind of optical line protection system; comprise first optical fiber circuit-protecting equipment and second optical fiber circuit-protecting equipment; the emission port T1 of first optical fiber circuit-protecting equipment connects the receiving port R1 of second optical fiber circuit-protecting equipment by optical fiber; the emission port T2 of first optical fiber circuit-protecting equipment connects the receiving port R2 of second optical fiber circuit-protecting equipment by optical fiber; the receiving port R1 of first optical fiber circuit-protecting equipment connects the emission port T1 of second optical fiber circuit-protecting equipment by optical fiber; the receiving port R2 of first optical fiber circuit-protecting equipment connects the emission port T2 of second optical fiber circuit-protecting equipment, described first optical fiber circuit-protecting equipment and the foregoing optical fiber circuit-protecting equipment of second optical fiber circuit-protecting equipment by optical fiber.
As can be seen from the above technical solutions; adopt electric cross bar switch to replace the signal shifter spare of traditional optical crossbar switch as optical line protection device; on cost, to have a clear superiority in; the price of electricity cross bar switch is relevant with bandwidth, and bandwidth is that the price of 6.5Gbps electricity cross bar switch only is 1/10 of mechanical optical switch price.The speed of electricity cross bar switch is generally nanosecond (10-9 second) level; and optical switch commonly used is generally millisecond (10-3 level); make the electricity consumption cross bar switch can realize the express passway switching; in some low speed service application; even can accomplish that user's unaware switches, be fit to very much at present more and more the protection of communication service that real-time is had relatively high expectations.And, have photoelectricity light conversion module among the present invention program, therefore also just had regeneration function to signal, can realize the shaping again of signal and amplification are again improved signal quality, expanding transmission distance.By using dissimilar optical transceiver modules, interface conversion function can also be integrated in the optical line protection device, and then realization is to the protection of multiservice interface, as the light protection of single fiber, the light protection of multimode business etc.
Description of drawings
Fig. 1 a is the schematic diagram of the optical line protection device realized of electric cross bar switch that the embodiment of the invention proposes;
Fig. 1 b is the structural representation of the electric cross bar switch in the described optical line protection device;
Fig. 2 is that electric cross bar switch is realized 1+1 protection work schematic diagram in the embodiment of the invention;
Fig. 3 is that electric cross bar switch is realized 1: 1 protection work schematic diagram in the embodiment of the invention;
Fig. 4 a and Fig. 4 b are embodiment of the invention 1+1 protection mode applied topology schematic diagram, and wherein, Fig. 4 a is main with the normal situation of optical fiber, and Fig. 4 b is main situation with fiber failure;
Fig. 4 c realizes the flow chart that protection is switched under the fiber failure situation shown in Fig. 4 b;
Fig. 5 a and Fig. 5 b are 1: 1 protected mode applied topology of embodiment of the invention schematic diagram, and wherein, Fig. 5 a is main with the normal situation of optical fiber, and Fig. 5 b is main situation with fiber failure;
Fig. 5 c realizes the flow chart that protection is switched under the fiber failure situation shown in Fig. 5 b;
Fig. 6 a and Fig. 6 b are that the single fiber bi-directional fibre circuit of 1: 1 protected mode of the embodiment of the invention is protected topological schematic diagram, and wherein, Fig. 6 a is main with the normal situation of optical fiber, and Fig. 6 b is main situation with fiber failure;
Fig. 7 realizes the process chart of automatic laser shutdown for the embodiment of the invention.
Embodiment
At the actual demand of in the optical communication technique evolution fibre circuit being protected, and the shortcoming of existing fibre circuit resist technology, the present invention proposes a kind of fibre circuit protection scheme that utilizes electric cross bar switch to realize.For making the purpose, technical solutions and advantages of the present invention clearer, below by specific embodiment and in conjunction with the accompanying drawings the present invention program is described in detail.
The optical line protection device schematic diagram that the embodiment of the invention proposes wherein comprises electric cross bar switch 102 and at least 3 optical transceiver modules (101,103,104) as shown in Figure 1a at least.Solid arrow be used to indicate torrent of light to, dotted arrow be used to indicate electric signal streams to.This optical line protection device is arranged between the client's side optical fibers and protection transmission equipment side optical fiber of fibre circuit.Described optical transceiver module 101 is connected with client's side optical fibers; described optical transceiver module 103 and optical transceiver module 104 are respectively with the main channel of described protection transmission equipment side optical fiber be equipped with channel connection; described electric Cross module 102 is arranged between described optical transceiver module 101 and described optical transceiver module 103 and the optical transceiver module 104; be used for optical transceiver module 101 being communicated with respectively with described optical transceiver module 103 or optical transceiver module 104 according to the strategy that presets.
Specifically, described electric cross bar switch 102 can be 1 group 4 * 4 electric cross bar switch or 2 group 2 * 2 electric cross bar switch, specifically shown in Fig. 1 b.Electricity cross bar switch 102 externally comprises 6 electrical interfaces at least, is respectively a, b, c, d, e, f.Wherein, electrical interface a is connected optical transceiver module 101 with b, and electrical interface c is connected optical transceiver module 103 respectively with d, and electrical interface e is connected optical transceiver module 104 respectively with f.Optical transceiver module 101 is used to connect client's side optical fibers, and described client is protected equipment.Rx connects the optical sender of protected equipment, and Tx connects the optical receiver of protected equipment.Optical transceiver module 103 and optical transceiver module 104 are used to protect transmission equipment side optical fiber.T1 interface and T2 interface are transmit port, and wherein the T1 interface is used to connect and main uses optical fiber, and the T2 interface is used to connect standby optical fiber.R1 interface and Interface R2 are receiving port, and wherein the R1 interface is used to connect and main uses optical fiber, Interface R2 to be used to connect standby optical fiber.
Optical transceiver module shown in Fig. 1 a (101), (103) and (104) general reference have the functional unit of light-receiving and light transmission, can be the transmitting-receiving separation modules, also can use the integrated module of optical transceiver, also can be single fiber bi-directional optical transceiver modules etc.If the single fiber bi-directional optical transceiver module, then light-receiving port and light transmit port integrate.For example, if optical transceiver module (101) is the single fiber bi-directional optical transceiver module, then interface Tx and Rx integrate.
Electric cross bar switch 102 general references can realize 3 tunnel functional units that intersect with power on signal among Fig. 1 a, and by software arrangements, electric cross bar switch can be realized the protection of 1+1 and 1: 1 flexibly.
Fig. 2 is that electric cross bar switch is realized 1+1 protection work schematic diagram in the embodiment of the invention, and wherein, left figure (a) is for working in the situation of main channel; interface a is connected with interface c; interface b is connected with interface d, and interface a also is connected with interface e simultaneously, and interface f is in idle state.Right figure (b) is for working in the situation of passage fully, and interface a is connected with interface e, and interface b is connected with interface f, and interface a also is connected with interface c simultaneously, and interface d is in idle state.As can be seen, before and after switching, the transmit path of light signal does not change, and just RX path is from the main f interface that switches to standby optical fiber with the d interface of optical fiber.
Fig. 3 is that electric cross bar switch is realized 1: 1 protection work schematic diagram in the embodiment of the invention; Wherein, left figure (a) is for working in the situation of main channel, and interface a is connected with interface c, and interface b is connected with interface d, and interface e and f are in idle state.Right figure (b) is for working in the situation of passage fully, and interface a is connected with interface e, and interface b is connected with interface f, and interface c and d are in idle state.As can be seen, before and after switching, the transmit path and the RX path of light signal change synchronously, all switch to standby optical fiber (interface e, f) from main with optical fiber (interface c, d).
Fig. 4 a and Fig. 4 b are embodiment of the invention 1+1 protection mode applied topology schematic diagram, and band slash blockage represent Optical Receivers, and the black blockage is represented optical transmission module, solid arrow pilot light signal flow to, dotted arrow indicate electric signal streams to.Wherein, Fig. 4 a is main with the normal situation of optical fiber, and Fig. 4 b is main situation with fiber failure;
Automatically the protection flow process is shown in Fig. 4 c, and protection card A wherein and protection card B are the described optical line protection device of the embodiment of the invention.This flow process comprises the steps:
It is unusual that step 402, protection card A detect main fine received optical power;
Specifically can be to connect main Optical Receivers with optical fiber to detect received optical power and lose alarm, perhaps, the CDR chip detection in the protection card A be alarmed to main receiving optical signals losing lock with optical fiber; Perhaps, the framer in the protection card A detects the alarm of transfiniting of main reception light error code with optical fiber.
Step 403: protection card A judges whether be equipped with fine received optical power this moment normal, if then the electric cross bar switch of trigger protection card A receive direction switches to standby optical fiber, promptly the inside of protection card A connects the form that switches to Fig. 2 (b) from the form of Fig. 2 (a).
When being in automatic switchover mode, software drives electric cross bar switch according to the trigger condition of setting, and trigger condition comprises that mainly received optical power loses alarm, the alarm of receiving optical signals losing lock, the reception light error code fault-signal triggering such as alarm etc. of transfiniting.
Fig. 5 a and Fig. 5 b are 1: 1 protected mode applied topology of embodiment of the invention schematic diagram, and wherein, Fig. 5 a is main with the normal situation of optical fiber, and Fig. 5 b is main situation with fiber failure.
Automatically the protection flow process comprises the steps: shown in Fig. 5 c
Step 501: main break down with optical fiber, fault specifically occur in protection card B to master that protection card A sends light signal with optical fiber on (shown in Fig. 5 b);
It is unusual that step 502: protection card A detects main fine received optical power;
Specifically can be to connect main Optical Receivers with optical fiber to detect received optical power and lose alarm, perhaps, the CDR chip detection in the protection card A be alarmed to main receiving optical signals losing lock with optical fiber; Perhaps, the framer in the protection card A detects the alarm of transfiniting of main reception light error code with optical fiber.
Step 503: the fibre that is equipped with of protection card A receives normally as this moment, and then the electric cross bar switch transmitting-receiving of trigger protection card A switches to standby optical fiber synchronously, and promptly the inside of protection card A connects the form that switches to Fig. 3 (b) from the form of Fig. 3 (a).
Step 504: all switch to standby optical fiber because protection card A sends and receives, this moment, protection card B master fibre received unusual.
Step 505: the fibre that is equipped with of protection card B receives normally as this moment, and then the electric cross bar switch transmitting-receiving of trigger protection card B switches to standby optical fiber synchronously.
The same with the 1+1 protection mode; during automatic switchover mode; software drives electric cross bar switch according to the trigger condition of setting, and trigger condition comprises that mainly received optical power loses alarm, the alarm of receiving optical signals losing lock, the reception light error code fault-signal triggering such as alarm etc. of transfiniting.
Based on the hardware composition proposal that provides as Fig. 1, can realize the single fiber protection very easily by the optical transceiver module that uses single fiber bi-directional.In this case, interface a and interface b integrate.In like manner, interface c and interface d also integrate, and interface e and interface f also integrate.Fig. 6 a and Fig. 6 b have provided the fibre circuit protection topology signal of single fiber bi-directional of 1: 1 protected mode of the embodiment of the invention.Wherein, Fig. 6 a is main with the normal situation of optical fiber, and Fig. 6 b is main situation with fiber failure.
The realization of single fiber protection also can divide 1+1 and 1: 1 dual mode, and is the same with 1: 1 protection implementation with the 1+1 of front.When fault took place, the place monitored fault at optical interface, had realized changeing the function of single fiber by the single fiber bi-directional optical transceiver module.
Based on hardware composition proposal as shown in Figure 1, can also realize all multi-functionally by software, comprise functions such as returning and do not return automatically function, manual switchover, pressure are switched, returned automatically, handoff delay, the unglazed bolt-lock of client's side, automatic laser shutdown automatically.With regard to several main basic functions, tell about specific implementation below.
Automatically return and do not return function automatically: under the automatic switchover mode, by main switch to standby optical fiber with optical fiber after, also be divided into and return automatically and backtrack mode not automatically.Under automatic backtrack mode, recover just often the then automatic main optical fiber of using of switchback with optical fiber when main; And backtrack mode not automatically then as long as the standby optical fiber of work at present is in normal condition, does not just trigger switching.
Force to switch: force to switch and be meant that active and standby route can dispatch arbitrarily by device panel and webmaster.
Fault delivery: the function that this fibre circuit protection that is based on the electricity layer should have, in order to guarantee when lines upstream breaks down, rapidly fault message being passed to the downstream.To realize the equipment of fibre circuit protection based on photosphere, then do not need to consider this function.The implementation method of this function is: when client's side (the receiving port Rx of optical transceiver module 101) receives when unglazed, then rapidly the transmission of the active and standby light mouth in line side (optical transmitting set of the optical transmitting set of the transmit port T1 of optical transceiver module 103 and the transmit port T2 of optical transceiver module 104) is closed; Work at present route (the receiving port R1 of optical transceiver module 103 or the receiving port R2 of optical transceiver module 104) receives when unglazed, then rapidly with the optical transmitting set of the transmit port Tx of the transmission optical transceiver module 101 of client's side) close.Under automatic switchover mode, this function acquiescence should be enabled state.As not opening this function, when client's side interface receives when unglazed, this fault message can not be delivered to the line side, can cause distal embolic protection card mistake to be switched.
Switching delay: the switching delay time interval can be set arbitrarily.When having kinds of protect in the network, different protection systems is set different handoff delay, can avoid because kinds of protect is moved simultaneously and caused network unusual.
Automatic laser shutdown (Auto Laser ShutDown): when a certain light mouth receives when unglazed, software control sends this light mouth automatically and turn-offs, and this is to define in " ITU-T is the light safety measure and the requirement of light conveying system G.664 ".Fig. 7 comprises the steps: for the handling process of embodiment of the invention realization automatic laser shutdown
Step 701: judge whether to occur received optical power alarm, if execution in step 702 then, otherwise repeat this step.
Step 702: judge that whether the alarm duration is above threshold value, if then continue execution in step 703, otherwise return step 701.In the present embodiment, described threshold value is set to 500 milliseconds.
Step 703: close the laser that sends light signal.
Step 704: wait for 100-300 second.
Step 705: opened laser 2 seconds, and went to step 701.
Make that using up opens the light and realize the scheme of fibre circuit protection to be compared with at present commonly used, the electricity consumption cross bar switch that makes that the present invention proposes is realized the scheme of fibre circuit protection, has following advantage:
1, the scheme of electricity consumption cross bar switch to be had a clear superiority on cost; the price of electricity cross bar switch is relevant with bandwidth; bandwidth is that the price of 6.5Gbps electricity cross bar switch only is 1/10 of mechanical optical switch price; the bandwidth of 6.5G can satisfy most application in the network at present; especially at Access Network, this is fit to the scale commercialization at Access Network of light protection product very much.To being higher than the application of 6.5G, such electric cross bar switch product is less at present, uses the scheme of optical switch usually.
2, the speed of electric cross bar switch is generally nanosecond (10-9 second) level; and optical switch commonly used is generally millisecond (10-3 level); make the electricity consumption cross bar switch can realize the express passway switching; in some low speed service application; even can accomplish that user's unaware switches, be fit to very much at present more and more the protection of communication service that real-time is had relatively high expectations.
3, compare with protection, make in the scheme of electricity consumption cross bar switch, have photoelectricity light conversion module, therefore also just had regeneration function, can realize the shaping again of signal and amplification are again improved signal quality, expanding transmission distance signal based on photosphere.And the protection of photosphere does not only have and amplifies and shaping feature, also can introduce extra insertion loss, and bring other as return loss, and optical properties such as Wavelength Dependent Loss are damaged, and influences the transmission performance of original system.To insert loss is example, and based on the 1+1 light protection scheme of optical switch, it is 4.5dB that the typical case inserts loss, to the signal of communication of 1550nm wave band, has been equivalent to reduce 20 kilometers transmission range; 1: 1 smooth protection scheme based on optical switch; it is 3dB that the typical case inserts loss; signal of communication to the 1550nm wave band; be equivalent to 15 kilometers transmission range less; this has limited the application of fiber optic protection, also will increase expensive fiber amplifier and dispersion compensation module and come electrode compensation and chromatic dispersion in a lot of protection systems.
4, use optical transceiver module to power up the scheme that cross bar switch is realized the fibre circuit protection among the present invention; can realize the protection of single fiber bi-directional business very easily; and the scheme of use optical switch; then need to increase a plurality of wavelength division multiplexers; this causes cost significantly to increase; and further having increased the insertion loss, complex manufacturing can't the scale commercialization.
5, the present invention is owing to used light to send and receiver module; by selecting for use different types of light to send and receiver module; can also realize different transmission medium translation functions; conversion between multimode fiber and the monomode fiber; conversion between single fiber and the two fibre; the conversion of different wave length, and then expanded the range of application of Optical Line Protection product.And the fibre circuit protection of using optical switch to realize then can't independently realize these functions.
6, the scheme of electric cross bar switch is compared with the scheme of optical crossbar switch, and the realization of electric interleaved scheme is more simple, and volume is small and exquisite, and production technology is simple, is fit to large-scale production.
7, in the scheme of electric cross bar switch, 1+1 and 1: 1 protection can a shared hardware platform, according to user's needs, uses software arrangements to be the corresponding protection mode.And in the scheme of optical switch, 1+1 with 1: 1st, different hardware plan, and cost and performance difference are bigger.
The above only is preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of being done within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (11)
1. optical line protection device, be arranged between the client's side optical fibers and protection transmission equipment side optical fiber of fibre circuit, it is characterized in that this device comprises: optical transceiver module (101), electric cross bar switch (102), optical transceiver module (103) and optical transceiver module (104); Described optical transceiver module (101) is connected with client's side optical fibers; described optical transceiver module (103) and optical transceiver module (104) are respectively with the main channel of described protection transmission equipment side optical fiber be equipped with channel connection; described electric Cross module (102) is arranged between described optical transceiver module (101) and optical transceiver module (103) and optical transceiver module (101) and the optical transceiver module (104); be used for optical transceiver module (101) being communicated with respectively with described optical transceiver module (103) or optical transceiver module (104) according to the strategy that presets.
2. optical line protection device according to claim 1, it is characterized in that, this device comprises light transmit port Tx and the light-receiving port Rx that is used to connect client's side optical fibers, be used to connect main the transmit port T1 and the receiving port R1 of protection transmission equipment side, be used to connect the transmit port T2 and the receiving port R2 of the standby optical fiber of protecting transmission equipment side with optical fiber;
Described electric cross bar switch (102) comprises 6 external electrical interfaces (a～f), electrical interface (a) is connected optical transceiver module (101) with electrical interface (b), electrical interface (c) is connected optical transceiver module (103) with electrical interface (d), and electrical interface (e) is connected optical transceiver module (104) with electrical interface (f); First signal of telecommunication that receives by electrical interface (a) sends by electrical interface (c) and/or electrical interface (e); Electricity cross bar switch (102) sends by electrical interface (b) by second signal of telecommunication that electrical interface (d) or electrical interface (f) receive;
It is light signal that described optical transceiver module (101) is used for second electrical signal conversion from electrical interface (b), and by light transmit port Tx described light signal is sent to protected equipment; And will be converted to first signal of telecommunication, and described first signal of telecommunication is sent to electrical interface (a) by the light signal that light-receiving port Rx receives from protected equipment;
It is light signal that described optical transceiver module (103) is used for first electrical signal conversion from electrical interface (c), and by transmit port T1 described light signal is sent to the main optical fiber of using; And will be converted to second signal of telecommunication, and described second signal of telecommunication is sent to electrical interface (d) by the fine light signal of independently using up that receiving port R1 receives;
It is light signal that described optical transceiver module (104) is used for first electrical signal conversion from electrical interface (e), and by transmit port T2 described light signal is sent to standby optical fiber; And will be converted to second signal of telecommunication, and described second signal of telecommunication is sent to electrical interface (f) by the light signal that receiving port R2 receives from standby optical fiber.
3. optical line protection device according to claim 2 is characterized in that, described electric cross bar switch (102) is 1 group 4 * 4 electric cross bar switch or 2 group 2 * 2 electric cross bar switch.
4. optical line protection device according to claim 2 is characterized in that, described optical transceiver module (101), (103) and (104) are separate light receiving unit and light transmitting element, or the integrated module of optical transceiver, or the single fiber bi-directional optical transceiver module.
5. according to the described optical line protection device of claim 2, it is characterized in that described electric cross bar switch (102) is before switching, first signal of telecommunication that receives by electrical interface (a) sends by electrical interface (c) and electrical interface (e); Electricity cross bar switch (102) sends by electrical interface (b) by second signal of telecommunication that electrical interface (d) receives;
Described electric cross bar switch (102) is after switching, and first signal of telecommunication that receives by electrical interface (a) sends by electrical interface (c) and electrical interface (e); Electricity cross bar switch (102) sends by electrical interface (b) by second signal of telecommunication that electrical interface (f) receives.
6. according to the described optical line protection device of claim 2, it is characterized in that described electric cross bar switch (102) is before switching, first signal of telecommunication that receives by electrical interface (a) sends by electrical interface (c); Electricity cross bar switch (102) sends by electrical interface (b) by second signal of telecommunication that electrical interface (d) receives;
Described electric cross bar switch (102) is after switching, and first signal of telecommunication that receives by electrical interface (a) sends by electrical interface (e); Electricity cross bar switch (102) sends by electrical interface (b) by second signal of telecommunication that electrical interface (f) receives.
7. according to claim 5 or 6 described optical line protection devices; it is characterized in that; optical transceiver module (103) is used to monitor and connects main receiving port R1 with optical fiber and received optical power whether occurs and lose alarm, if then trigger the described switching of electric cross bar switch 102 execution.
8. according to claim 5 or 6 described optical line protection devices; it is characterized in that optical line protection device further comprises the CDR module, be used for whether the monitoring connection is main the alarm of receiving optical signals losing lock occurs with optical fiber; if then trigger electric cross bar switch 102 and carry out described switching.
9. according to claim 5 or 6 described optical line protection devices; it is characterized in that optical line protection device further comprises framer, be used for monitoring and connect mainly the alarm of transfiniting of light error code whether to occur receiving with optical fiber; if then trigger electric cross bar switch 102 and carry out described switching.
10. according to each described optical line protection device of claim 1 to 6, it is characterized in that, when the receiving port Rx of optical transceiver module (101) receives when unglazed, then the optical transmitting set of the transmit port T2 of the optical transmitting set of the transmit port T1 of optical transceiver module (103) and optical transceiver module (104) cuts out; The receiving port R2 of the receiving port R1 of optical transceiver module (103) or optical transceiver module (104) receives when unglazed, and the optical transmitting set that then will send the transmit port Tx of optical transceiver module (101) cuts out.
11. optical line protection system; comprise first optical fiber circuit-protecting equipment and second optical fiber circuit-protecting equipment; the emission port T1 of first optical fiber circuit-protecting equipment connects the receiving port R1 of second optical fiber circuit-protecting equipment by optical fiber; the emission port T2 of first optical fiber circuit-protecting equipment connects the receiving port R2 of second optical fiber circuit-protecting equipment by optical fiber; the receiving port R1 of first optical fiber circuit-protecting equipment connects the emission port T1 of second optical fiber circuit-protecting equipment by optical fiber; the receiving port R2 of first optical fiber circuit-protecting equipment connects the emission port T2 of second optical fiber circuit-protecting equipment by optical fiber; it is characterized in that described first optical fiber circuit-protecting equipment and second optical fiber circuit-protecting equipment are the described optical fiber circuit-protecting equipment of claim 2.
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| CN201010156051A CN101826917A (en) | 2010-04-21 | 2010-04-21 | Optical line protection device and system |
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| CN201010156051A CN101826917A (en) | 2010-04-21 | 2010-04-21 | Optical line protection device and system |
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| CN103368639A (en) * | 2012-03-29 | 2013-10-23 | 京信通信系统（中国）有限公司 | RRU optical fiber switching method and RRU optical fiber switching system |
| CN103795458A (en) * | 2013-11-27 | 2014-05-14 | 国家电网公司 | Optical fiber switching protection system and control method thereof |
| CN104301032A (en) * | 2014-10-29 | 2015-01-21 | 国家电网公司 | Optical line automatic switching protection system |
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| US9191101B2 (en) | 2011-06-21 | 2015-11-17 | Huawei Technologies Co., Ltd. | Optical line transmission protection system and method |
| CN103368639A (en) * | 2012-03-29 | 2013-10-23 | 京信通信系统（中国）有限公司 | RRU optical fiber switching method and RRU optical fiber switching system |
| CN103795458A (en) * | 2013-11-27 | 2014-05-14 | 国家电网公司 | Optical fiber switching protection system and control method thereof |
| CN104301032A (en) * | 2014-10-29 | 2015-01-21 | 国家电网公司 | Optical line automatic switching protection system |
| WO2016095715A1 (en) * | 2014-12-18 | 2016-06-23 | 中兴通讯股份有限公司 | Optical transceiving module and implementation method therefor |
| CN104617553A (en) * | 2015-02-15 | 2015-05-13 | 桂林恒毅金宇通信技术有限公司 | Photo-switch switching protection device |
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| CN109361454A (en) * | 2018-11-20 | 2019-02-19 | 北京见合八方科技发展有限公司 | A kind of smooth protective module and system |
| CN109361454B (en) * | 2018-11-20 | 2024-07-16 | 北京见合八方科技发展有限公司 | Light protection module and system |
| CN109995456B (en) * | 2019-02-27 | 2020-07-24 | 中国人民解放军战略支援部队信息工程大学 | Multi-level straight-through protection device and method for tandem equipment applied to SDH transmission |
| CN109995456A (en) * | 2019-02-27 | 2019-07-09 | 中国人民解放军战略支援部队信息工程大学 | Multi-level straight-through protection device and method for tandem equipment applied to SDH transmission |
| CN110784258A (en) * | 2019-11-04 | 2020-02-11 | 宁波市樱铭电子科技有限公司 | Optical channel control system |
| CN111342928A (en) * | 2020-03-27 | 2020-06-26 | 国网河南省电力公司信息通信公司 | A WDM system with fast switching of optical bypass protection |
| CN112003453A (en) * | 2020-07-15 | 2020-11-27 | 中国南方电网有限责任公司超高压输电公司广州局 | Converter valve triggering framework for realizing charged fault handling |
| CN113794958A (en) * | 2021-09-08 | 2021-12-14 | 北京机电工程研究所 | A multi-area-based intelligent networking control method |
| CN113794958B (en) * | 2021-09-08 | 2024-03-22 | 北京机电工程研究所 | Intelligent networking control method based on multiple areas |
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Application publication date: 20100908 |