CN101179349A - Protection switching coordination control device and method of wavelength division multiplexing system carrying client network - Google Patents
Protection switching coordination control device and method of wavelength division multiplexing system carrying client network Download PDFInfo
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- CN101179349A CN101179349A CNA2006101383317A CN200610138331A CN101179349A CN 101179349 A CN101179349 A CN 101179349A CN A2006101383317 A CNA2006101383317 A CN A2006101383317A CN 200610138331 A CN200610138331 A CN 200610138331A CN 101179349 A CN101179349 A CN 101179349A
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Abstract
The invention discloses a protection switching coordination control device for wavelength division multiplexing system bearing client network and the method. The invention is manufactured in order to realize the protection switching coordination control between a WDM system and a client level system that the WDM system bears. The device comprises an n-wavelength pathway photoelectric receiver, an n-wavelength pathway optical emitter, a protection switching and wavelength division device, a wavelength division multiplexing system signaling processor, a power detector, a protection switching controller, a false frame generator and a 1:n switching circuit. The method comprises the processes that: (1) the wavelength division multiplexing system tests the signals and attains defect information; (2) according to the attained defect information, the wavelength division multiplexing system sends false codes to the client level network or rewrites overhead bytes to shield the defect information; (3) the wavelength division multiplexing system locates the defect reasons and if the defect occurs in the wavelength division multiplexing system, the protection switching control is performed. The invention avoids the resource waste caused by multilayered protection switching design.
Description
Technical field
The present invention relates to the optical communication technique field, relate in particular to wavelength-division multiplex system (WDM) carrying client network protection switching coordination control device and method.
Background technology
The protection and the recovery capability that transmit net are very important.It is to be solved to be exactly under the situation that network breaks down, and can not need manual intervention to take quick emergency measures, guarantees that user's data (business) is not lost or few the losing of trying one's best.Realize network protection, need before network breaks down, be the transmission resource (for example optical fiber, wavelength path, VC-n particle etc.) of the pre-configured backup of a part in the network, after this part lost efficacy, directly enable resource backup and guarantee professional injury-free.The typical protection form of switching comprises 1+1 linear protection, n: m linear protection, looped network protection etc.They use specific resource backup to realize all at the particular network topology.
The SDH/SONET network has all kinds of protection switch functions, and (International Telecommunications Union's standard G.841; G.842; G.873.1; G.873.2); the protection form of switching comprises path protection and multiplex section protection; the protection implementation of switching is: by (the K1 in the SDH signal for example of overhead byte delivery in-band signalling in the client signal; the K2 byte; ODUk in the OTN signal); for example when protection in 1: 1; when receiving terminal is found signal defect, through inbound transmission link defective indication (protection switching request) is sent to the upstream by in-band signalling, upstream node identification back starts transmitting terminal protection switch function; after the identification of downstream, realize that selectivity receives.
Wdm system also has all kinds of protection switch functions, and the typical protection form of switching comprises multiplex section optical fiber share protect, optical wavelength path protection etc.Realize protecting the signaling procedure of switching similar to SDH/SONET, difference is generally to use independently Optical Supervisory Channel carrier signaling.
During wdm system carrying client layer network (for example SDH), there is the situation of multilayer protection.When fault took place, protection is switched only to be needed to take place on a layer, and should be preferential by service layer's network.But in real system, owing to the processing speed reason of service layer's network and client layer network, whose fast situation who switches may take place, or two-layer situation of switching simultaneously takes place.The method of a solution is to switch generation in the method wait lower floor that the client layer network settings are delayed.But owing to the reason of network hierarchy design causes the client layer network not understand service layer's network resource situation and control procedure, the prolongation of switching time of origin appears blindly waiting for, causing protecting.
Summary of the invention
For overcoming defective of the prior art and deficiency; the object of the present invention is to provide a kind of protection switching coordination control device and method of wavelength division multiplexing system carrying client network, to realize the coordination control between the client layer system that the protection reversed process carried in wdm system and it.
For achieving the above object, the present invention by the following technical solutions:
The protection switching coordination control device of wavelength division multiplexing system carrying client network comprises:
The protection switching coordination control device of wavelength division multiplexing system carrying client network, it is characterized in that, comprise: protection is switched with wave splitter device and is linked to each other with signal processor, and this protection is switched with n output of wave splitter device and linked to each other with the photelectric receiver of n wavelength path respectively; The photelectric receiver of n wavelength path links to each other with power detector, and the output of power detector is connected with the protection switch controller; Protection switch controller one end is connected with the wavelength-division multiplex system signal processor, and the other end is connected with pseudo-frame generator; The output of pseudo-frame generator is connected with the 1:n switching circuit, and the n of this a 1:n switching circuit output is connected with the optical transmitting set of n wavelength path respectively, and the corresponding connection of photelectric receiver of the optical transmitting set of n wavelength path and n wavelength path is with the transmission signal;
Switch the n road signal of exporting with wave splitter device through protection and be sent to respectively in the photelectric receiver of n wavelength path, photelectric receiver is sent to the signal that receives in the power detector, realizes that fault detect and fault restoration detect; The testing result of power detector is as the control foundation of protection switch controller, controlling pseudo-frame generator by the protection switch controller sends pseudo-code or rewrites overhead byte, through 1: the n switching circuit is distributed to the optical transmitting set of n wavelength path, outputs to the client layer network, reaches fault masking; Simultaneously, the protection switch controller sends protection to signal processor and switches instruction, and protection is switched with wave splitter device enforcement protection and switched.
Further, the reverse transmitting terminal at wavelength-division multiplex system comprises:
Close ripple and bridge-set, the photelectric receiver of n wavelength path, the optical transmitting set of n wavelength path, n signal discerned and the expense read/write circuit, synchronous and/or overhead processor;
Close ripple and bridge-set is connected in signal processor, and be connected successively with the optical transmitting set of n wavelength path, the photelectric receiver of a n wavelength path; Synchronous and/or overhead processor is connected with the protection switch controller; is connected with the expense read/write circuit with signal identification respectively simultaneously, signal discern and the expense read/write circuit respectively correspondence be connected between the optical transmitting set of the photelectric receiver of n wavelength path and n wavelength path.
Wherein, described signal identification and expense read/write circuit comprise receiving end signal identification and expense read/write circuit and identification of transmitting terminal signal and expense read/write circuit, wherein
Receiving end signal identification and expense read/write circuit for being applicable to the electric signal processing circuit of n the client layer network information that receiving terminal carried, can be realized signal identification and expense rewriting;
Identification of transmitting terminal signal and expense read/write circuit for being applicable to the electric signal processing circuit of n the client layer network information that transmitting terminal carried, are realized signal identification and expense rewriting.
Wherein, also include optical coupler and photodiode array detector; wherein optical coupler be connected in the protection switch and partial wave module and photoelectricity receiver module between, photodiode array detector is connected with optical coupler, each output of photodiode array detector is connected in the input of power detection module.
The protection switching coordination control method of wavelength division multiplexing system carrying client network comprises:
(1) wavelength-division multiplex system detects the signal of each wavelength path carrying, obtains fault message;
(2) according to the fault message that obtains, wavelength-division multiplex system sends pseudo-code or rewrites overhead byte to the client layer network, the shielding fault;
(3) wavelength-division multiplex system carries out fault location to the reason that produces fault, if fault betides wavelength-division multiplex system, then protects and switches control.
Wherein, also comprise after the step (3):
(4) after protection was switched successfully, wavelength-division multiplex system was removed the shielding to fault.
Adopt apparatus and method of the present invention; at wdm system as service layer's network carrying client network network (SDH for example: in the time of the synchronous digital transmission system); can fully utilize service layer's network and client layer protect networks resource, avoid the multilayer protection to switch the wasting of resources that design causes.When multilayer protection structure existed simultaneously, it was chaotic to avoid that same fault is taken place to protect the circuit of switching reaction and avoiding therefore may causing to connect simultaneously in two systems, the reliability of raising network protection.Also avoid the situation of the prolongation of switching time of origin occurring blindly waiting for, causing protecting because the client layer network is not understood service layer's network resource situation and control procedure.
Description of drawings
Fig. 1 is a WDM carrying client network protection switching coordination device schematic diagram;
Fig. 2 is the embodiment schematic diagram of WDM carrying client network protection switching coordination device;
Fig. 3 is the embodiment schematic diagram of wdm system when breaking down;
Fig. 4 is that WDM carrying client network detects and the control procedure schematic diagram is switched in protection;
Applicating example under complicated networking state when Fig. 5 is WDM carrying client network (SDH).
Wherein,
A, b: signal transmission direction
Osc:WDM system Optical Supervisory Channel is handled
Sc: protection switch controller
C: pseudo-frame generator
S: clean culture and broadcasting 1:n switch
Pt: power analysis device
The D:WDM system receiving terminal is switched and wave splitter device
M:WDM system transmitting terminal wave multiplexer
W: operating path
P: protection path
A31, a32 ..., a3n:a direction receiving terminal photelectric receiver
A41, a42 ..., a4n:a direction receiving terminal optical transmitting set
A11, a12 ..., a1n:a direction transmitting terminal photelectric receiver
A21, a22 ..., a2n:a direction transmitting terminal optical transmitting set
A10, the channel level protection optical receiver of a20:a direction wavelength path 1, reflector
B11, b12 ..., b1n:b direction transmitting terminal photelectric receiver optical receiver, reflector
B21, b22 ..., b2n:b direction transmitting terminal optical transmitting set
B10, the channel level protection of b20:b direction wavelength path 1
Ba:a direction channel level 1:1 protects bridge joint
Bb:b direction channel level 1:1 protects bridge joint
B51, b52 ..., b5n:b is to synchronous identification and expense read-write
A61, a62 ..., a6n:a is to synchronous identification and expense read-write
St: synchronous and overhead processor
D: coupler
P: optical power monitoring
W1, the W2:WDM node
S1, S2, SN:SDH node
The work route that signal transmits between SW:S1 and the S2
The protection route that signal transmits between SP:S1 and the S2
The work route that signal transmits between WW:W1 and the W2
The protection route that signal transmits between WP:W1 and the W2
Embodiment
Below in conjunction with the drawings and the specific embodiments the present invention is described in detail.
Fig. 1 has introduced a kind of embodiment of WDM carrying client network protection switching coordination device, is to increase pseudo-frame at the wdm system receiving terminal that has protection to switch ability to produce function formation.In Fig. 1, for convenience of description, this device is defined as receiving terminal at direction a.Particularly, comprise the protection switch and wave splitter device (D) wdm system signal processor (osc); the photelectric receiver of receiving terminal n wavelength path (a31, a32 ... a3n), power detector (pt), protection switch controller (sc); pseudo-frame generator (c); the 1:n switching circuit (s) that clean culture and/or broadcast-capable are arranged, the optical transmitting set of n wavelength path (a41, a42;, a4n).
Protection is switched and wave splitter device (D); be according to the general method for designing of wdm system with protection switch function; (the ITU-T standard G.808.1 to have receiving terminal 1+1 selectivity selector function or m:n intercrossing selector function; G.808.2); and the optical module combination with partial wave ability, can under commands for controlling, realize protecting and switch selection.
Wdm system signal processor (osc) is the general method for designing according to wdm system, has monitor channel in fiber optic transmission system, and bearing system Performance Detection message and signaling message carry out Message Processing and forwarding by this processor.
The photelectric receiver of receiving terminal n wavelength path (a31, a32 ..., a3n), be the reception that realizes each wavelength path signal of wdm system receiving terminal, carry out the opto-electronic conversion output signal of telecommunication, generally have functions such as the signal of telecommunication is retimed, shaping, regeneration.
Power detector (pt) is judged according to the optical power intensity that above-mentioned photelectric receiver received, and can provide luminous power defective (fault) indication.
The optical transmitting set of n wavelength path (a41, a42 ..., a4n), be the signal of telecommunication through regeneration, be modulated at laser output and realize the electric light conversion, finish light and transmit.The photoelectric characteristic of its output signal, and structure mapping satisfy the client layer network insertion requirement carried, link to each other with client layer network input interface.
Pseudo-frame generator (c) can produce the signal of telecommunication of the mapping structure that meets the requirement of client layer network input interface, and comprising can be for the overhead byte of identification, or the message bag.
The 1:n switching circuit (s) that clean culture and/or broadcast-capable are arranged, switching circuit with many outputs, the signal that pseudo-frame generator (c) produces can be sent to optical transmitting set (a41 respectively or simultaneously, a42,, a4n), in order to replace each wavelength path signal of telecommunication, drive above-mentioned optical transmitting set, realize the output of pseudo-code light.
Protect switch controller (sc), be applied in the control program of its internal operation, implement the control of protection switching coordination according to the method described in the present invention.Have the indication input of luminous power defective, pseudo-frame generator control output, WDM protection and switch interfaces such as instruction input and output.
Above-mentioned power detector (pt) and photelectric receiver (a31, a32 ..., a3n) link to each other, can realize that fault detect and fault restoration detect, testing result is input to above-mentioned protection switch controller (sc) as the control foundation; This protection switch controller can be controlled above-mentioned pseudo-frame generator (c), and the signal of formation is through switching circuit (s) dispensing, be used to replace line signal drive above-mentioned optical transmitting set (a41, a42 ..., a4n); Above-mentioned protection switch controller (sc) can produce protection and switch instruction and protection and switch and reply instruction, realizes that through signal processor (osc) transmitting system upstream and downstream equipment protection switches and reply control.
Fig. 2 is another embodiment of WDM carrying client network protection switching coordination device, on basis embodiment illustrated in fig. 1, further comprises reverse transmitting terminal of wdm system and all directions overhead processing function.Particularly, on the basis of the described scheme of last joint, also comprise other direction (direction b) and close ripple and bridge-set (M), (b1 1 for the photelectric receiver of transmitting terminal n wavelength path, b12 ..., b1n), optical transmitting set (b21, b22 ..., b2n), b to the identification of each wavelength path signal of transmitting terminal and expense read/write circuit (b51, b52 ... b5n), a is to receiving end signal identification and expense read/write circuit (a61, a62,, a6n), synchronous and/or overhead processor (st).Whole parts of both direction are included in the same equipment.
Direction b closes ripple and bridge-set (M); be according to the general method for designing of wdm system with protection switch function; having transmitting terminal 1+1 concurrent function or m:n switches bridging functionality (the ITU-T standard G.808.1; G.808.2); and having the optical module combination of closing wave energy power, its m:n defencive function can be realized switching under commands for controlling.
Photelectric receiver (the b11 of n wavelength path of direction b transmitting terminal, b12, b1n), it is the reception that realizes each wavelength path signal of wdm system transmitting terminal, the photoelectric characteristic of its input signal, and structure mapping satisfy the client layer network insertion requirement carried, link to each other with client layer network output interface.
Direction b optical transmitting set (b21, b22 ..., b2n), be modulated at laser output and realize the electric light conversion, finish light and transmit.Its output signal meets the wdm system transmission and requires (the ITU-T standard G.692), so that realize the suitably multiplexing transmission of distance, suitable wavelength interval.
Direction b transmitting terminal each identification of wavelength path signal and expense read/write circuit (b51, b52, b5n), be be applicable to transmitting terminal path i (i=1,2 ... the electric signal processing circuit of the client layer network information of n) being carried can be realized functions such as signal identification (for example extraction synchronously, rate identification, expense identification) and expense rewriting.
Identification of direction a receiving end signal and expense read/write circuit (a61, a62, a6n), be be applicable to receiving terminal path i (i=1,2 ... the electric signal processing circuit of the client layer network information of n) being carried can be realized functions such as signal identification (for example extraction synchronously, Clock Extraction, overhead extraction) and expense rewriting.
Synchronously and/or overhead processor (st), have signal Synchronization and recognition function, can judge that defective takes place, the indication of output defective by expense identification, and can produce the overhead byte that meets client's net signal map call format.
Protect switch controller (sc), be applied in the control program of its internal operation, implement the control of protection switching coordination according to the method described in the present invention.Except that having function embodiment illustrated in fig. 1, also there is interactive interface with processor (st).
Embodiment illustrated in fig. 2 and Fig. 1 difference also is: use optical coupler (d) to sample, realize that by photoelectric diode (p) array luminous power detects, as embodying another embodiment identical with Fig. 1 design concept at each wavelength path of receiving terminal.The method of carrying out the luminous power detection is a lot, herein can not be exhaustive, and use any other concrete design to reach the purpose that this specification is realized but do not get rid of.
Other part in embodiment illustrated in fig. 2, identical according to the legend mark with middle each corresponding part function embodiment illustrated in fig. 1, no longer repeat here.
Embodiment illustrated in fig. 2 except that having repertoire embodiment illustrated in fig. 1, also have following function: synchronous and/or overhead processor (st) is discerned with the signal on the above-mentioned all directions and is linked to each other with the expense read/write circuit, and mutual with protection switch controller (sc).Protection switch controller (sc) can be judged by the defective indication of processor (st) output; start the overhead processing function; according to the suitable signal of telecommunication of classification (speed, data format etc.) control pseudo-code generator (c) output of client signal, and the overhead byte of controlling overhead processor (st) rewriting or transparent transmission client signal as required.
On embodiment basis shown in Figure 2, do not get rid of and use a plurality of pseudo-code generator c, can produce the signal of multiple different data format simultaneously, a plurality of client's net signal defects that WDM carries are simultaneously realized shielding.At this moment require circuit (s) to have the circuit crossing of many inputs.
Fig. 3 is the embodiment of wdm system when breaking down, and is without loss of generality, and has used device embodiment shown in Figure 1 as receiving terminal.The whole parts of transmitting terminal of the receiving terminal of a direction and b direction are included in the same equipment in Fig. 2, and each related part is understood according to function mentioned above according to legend.B direction receiving end device is identical with a direction receiving end device functional configuration among the figure, and therefore a with dashed lines frame table shows.
As giving an example of protection type, there is WDM multi-section shared protection (1: 1 or 1+1) in the drawings, use two fiber transmission links respectively as active link (W) and protection link (P).
As giving an example of protection type, in Fig. 2, also there is optical channel (1: 1) protection, use of the protection of the path of transmitting terminal input port 0 expression as the represented path of port one.Relate to optical receiver (a10), optical transmitting set (a20), the bridger (Ba) of a direction path 0, and the optical receiver (b10), optical transmitting set (b20), the bridger (Bb) that relate to b direction path 0.The control relation of a direction receiving terminal protection switch controller (sc) existence and b direction Optical Channel Protection bridger (Bb) among the figure; The function of b direction similarly.
In system shown in Figure 3, the fault of protection is arranged a situation arises that (being labeled as X among the figure) mainly contains:
When there was multiplex section protection in fault 1:WDM, losing efficacy with a direction multiplex section working optical fibre link (W) was example, the optical receiver of each wavelength channel of a direction receiving terminal (a31, a32 ..., a3n) detect light and lose;
When there was path protection in fault 2:WDM, losing efficacy with a direction passage 1 optical transmitting set (a21) was example, and optical receiver (a31) input of a direction receiving terminal passage 1 is unglazed, detects light and loses;
When there was path protection in fault 3:WDM, losing efficacy with a direction passage 1 optical receiver (a11) was example, and optical receiver (a31) input of a direction receiving terminal passage 1 has light, but receiving terminal is synchronous or expense is lost;
Present embodiment has only been enumerated several typical case that have the protection fault to take place in wdm system, do not get rid of the protection type of other modes and also can use the principle identical with control procedure of the present invention.
Fig. 4 has represented that WDM carrying client network detects and control procedure is switched in protection, is elaborated below in conjunction with the embodiment of Fig. 1 to 3.
The 1st step: fault discovery: wdm system carries out Performance Detection by the signal to each wavelength path carrying or expense reads, and obtains fault generation information.
The 2nd step: defective shielding: wdm system is by sending pseudo-code to the client layer network, or rewrites overhead byte, realizes the defective shielding;
Fault 3 among the embodiment of corresponding system shown in Figure 3, application drawing 2 shown device embodiment, protection switch controller (sc) is if judge dropout according to the signal defect alarm indication that comes motor synchronizing and overhead processor (st), the client's net signal type that is carried according to wavelength path 1 then, instruct pseudo-frame generator (c) to send the complete signal of form, its expense and mapping format conform to client's net signal type, be distributed to the optical transmitting set (a41) of wavelength path 1 through switching circuit (s), output to the client layer network, reach the purpose of defective shielding; Protection switch controller (sc) if according to coming motor synchronizing and overhead processor (st) though signal defect alarm indication judge that signal do not lose, but overhead byte is unusual, the client's net signal type that is carried according to wavelength path 1 then, instruction overhead processor (st) generates normal overhead byte, in the signal that expense read-write (a61) insertion wavelength path 1 is carried, output to the client layer network, reach the purpose of defective shielding; For example when the client layer network was SDH, multiplex section protection exchanging overhead byte " K1 ", " K2 ", defective indication " AIS " etc. need obtain handling.
When other unshielded fault takes place, in device embodiment illustrated in figures 1 and 2, also finish above-mentioned shielding processing process according to the alarm indication.
The 3rd step: fault location: wdm system is for example alarmed distribution and topological connection situation etc., the reason that failure judgement takes place;
If protection switch controller (sc) was judged as the unprotect fault and took place according to the system protection configuration when other unshielded fault take place to take place the 2nd step.
The 4th step: switch control: when confirming that fault betides wdm system, implement protection and switch control;
The 5th step: remove shielding: switch successfully in above-mentioned the 4th step wdm system protection; or above-mentioned the 3rd step affirmation fault can't be when the wdm system layer be repaired automatically; remove the described defective shielding of above-mentioned the 2nd step; promptly protect switch controller (sc) to send instruction and give pseudo-frame generator (c), and overhead processor (st), close the output of pseudo-frame generator (c) and stop interference the optical passage signal expense.
Corresponding said method, the embodiment of application drawing 2 shown devices can also handle following situation.The time of realizing the defective shielding when a direction has surpassed client layer network failure acknowledging time; when causing the b direction to produce the protection switching request; can pass through overhead processor (st) and generate suitable overhead byte; read and write (b51 at b to expense; b52;, b5n) circuit is switched to instruct to client layer protection and is shielded.For example SDH equipment has 24 frames time-delays (being approximately 3ms) the affirmation function to LOF (LOF), when the LOF phenomenon is not recovered, will send the protection switching request in the b direction, among the insertion b direction signal expense (for example K1, K2 byte).The system for the treatment of finishes after the above-mentioned course of work, removes the interference to b direction signal expense again.
Adopt apparatus and method of the present invention; do not get rid of the application of following mode: when the failure event that exists the WDM receiving terminal effectively not detect in a direction takes place yet; because SDH wrap protection; switch signaling at b to existing to protect; WDM goes ahead of the rest to the SDH expense and intercepts at this moment, treats that the whole network is finished back, automatic fault location, releasing shields as required again.
Applicating example under complicated networking state when Fig. 5 is WDM carrying client network (SDH).Part among the figure between WDM node W1 and the W2 is by WDM carrying SDH network, S1, and S2 ..., SN is the SDH node, as the part of complicated mesh network.The work route SW and the protection route SP that between SDH node S1 and S2, exist signal to transmit.The work route WW and the protection route WP that between WDM node W1 and W2, exist signal to transmit.
When W1 among the route WW when the signal of W2 direction breaks down, WDM node W2 detects fault and takes place, and the pseudo-frame of output SDH realizes the defective shielding to S2, makes the SDH network can not perceive the fault generation.When node W2 identification fault is in the time of can recovering fault, to switch by the protection that the wdm system signaling procedure starts between W1 node and the W2 node, make professional being switched to protect path WP by former operating path WW, behind business recovery, remove defective and shield.
Signal beyond the route WW break down or route WW in expendable fault takes place, when causing the signal defect between node S1 and the S2, the WDM node is also rewritten by pseudo-frame output or expense in advance and is realized the defective shielding, when being judged as the W1 node indeterminable fault takes place between the W2 node, remove the defective shielding immediately.Then can start protection by SDH system signaling process between node S1 and the S2 and switch, make operating path be transformed into SP by SW.
Claims (6)
1. the protection switching coordination control device of wavelength division multiplexing system carrying client network, it is characterized in that, comprise: protection is switched with wave splitter device and is linked to each other with signal processor, and this protection is switched with n output of wave splitter device and linked to each other with the photelectric receiver of n wavelength path respectively; The photelectric receiver of n wavelength path links to each other with power detector, and the output of power detector is connected with the protection switch controller; Protection switch controller one end is connected with the wavelength-division multiplex system signal processor, and the other end is connected with pseudo-frame generator; The output of pseudo-frame generator is connected with the 1:n switching circuit, and the n of this a 1:n switching circuit output is connected with the optical transmitting set of n wavelength path respectively, and the corresponding connection of photelectric receiver of the optical transmitting set of n wavelength path and n wavelength path is with the transmission signal;
Switch the n road signal of exporting with wave splitter device through protection and be sent to respectively in the photelectric receiver of n wavelength path, photelectric receiver is sent to the signal that receives in the power detector, realizes that fault detect and fault restoration detect; The testing result of power detector is as the control foundation of protection switch controller, controlling pseudo-frame generator by the protection switch controller sends pseudo-code or rewrites overhead byte, be distributed to the optical transmitting set of n wavelength path through the 1:n switching circuit, output to the client layer network, reach fault masking; Simultaneously, the protection switch controller sends protection to signal processor and switches instruction, and protection is switched with wave splitter device enforcement protection and switched.
2. the protection switching coordination control device of wavelength division multiplexing system carrying client network according to claim 1, it is characterized in that, reverse transmitting terminal at wavelength-division multiplex system comprises: close ripple and bridge-set, the photelectric receiver of n wavelength path, the optical transmitting set of n wavelength path, n signal discerned and the expense read/write circuit, synchronous and/or overhead processor;
Close ripple and bridge-set is connected in signal processor, and be connected successively with the optical transmitting set of n wavelength path, the photelectric receiver of a n wavelength path; Synchronous and/or overhead processor is connected with the protection switch controller; is connected with the expense read/write circuit with signal identification respectively simultaneously, signal discern and the expense read/write circuit respectively correspondence be connected between the optical transmitting set of the photelectric receiver of n wavelength path and n wavelength path.
3. the protection switching coordination control device of wavelength division multiplexing system carrying client network according to claim 2; it is characterized in that; described signal identification and expense read/write circuit comprise receiving end signal identification and expense read/write circuit and identification of transmitting terminal signal and expense read/write circuit, wherein
Receiving end signal identification and expense read/write circuit for being applicable to the electric signal processing circuit of n the client layer network information that receiving terminal carried, can be realized signal identification and expense rewriting;
Identification of transmitting terminal signal and expense read/write circuit for being applicable to the electric signal processing circuit of n the client layer network information that transmitting terminal carried, are realized signal identification and expense rewriting.
4. according to the protection switching coordination control device of claim 2 or 3 described wavelength division multiplexing system carrying client networks; it is characterized in that; also include optical coupler and photodiode array detector; wherein optical coupler be connected in the protection switch and wave splitter device and photelectric receiver between; photodiode array detector is connected with optical coupler, and each output of photodiode array detector is connected in the input of power detector.
5. the protection switching coordination control method of wavelength division multiplexing system carrying client network is characterized in that, comprising:
(1) wavelength-division multiplex system detects the signal of each wavelength path carrying, obtains fault message;
(2) according to the fault message that obtains, wavelength-division multiplex system sends pseudo-code or rewrites overhead byte to the client layer network, the shielding fault;
(3) wavelength-division multiplex system carries out fault location to the reason that produces fault, if fault betides wavelength-division multiplex system, then protects and switches control.
6. the protection switching coordination control method of wavelength division multiplexing system carrying client network according to claim 4 is characterized in that, also comprises:
(4) after protection was switched successfully, wavelength-division multiplex system was removed the shielding to fault.
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| CN101951532A (en) * | 2010-09-07 | 2011-01-19 | 华为技术有限公司 | Transmission and acquirement method, device and system of OTN (Optical Transport Network) network business defect information |
| CN102404048A (en) * | 2011-11-29 | 2012-04-04 | 南京中兴特种软件有限责任公司 | No warning switching method for SONET/SDH network line and monitoring equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101951532A (en) * | 2010-09-07 | 2011-01-19 | 华为技术有限公司 | Transmission and acquirement method, device and system of OTN (Optical Transport Network) network business defect information |
| CN101951532B (en) * | 2010-09-07 | 2013-06-12 | 华为技术有限公司 | Transmission and acquirement method, device and system of OTN (Optical Transport Network) network business defect information |
| CN102404048A (en) * | 2011-11-29 | 2012-04-04 | 南京中兴特种软件有限责任公司 | No warning switching method for SONET/SDH network line and monitoring equipment |
| CN102404048B (en) * | 2011-11-29 | 2014-06-25 | 南京中新赛克科技有限责任公司 | No warning switching method for SONET/SDH network line and monitoring equipment |
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