CN1790952A - Optical crossconnect apparatus and optical transmission system - Google Patents
Optical crossconnect apparatus and optical transmission system Download PDFInfo
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- CN1790952A CN1790952A CN 200510137015 CN200510137015A CN1790952A CN 1790952 A CN1790952 A CN 1790952A CN 200510137015 CN200510137015 CN 200510137015 CN 200510137015 A CN200510137015 A CN 200510137015A CN 1790952 A CN1790952 A CN 1790952A
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Abstract
An optical crossconnect apparatus which includes one terminal connected to a transmission path from one optical transmission terminal station and another terminal connected to a transmission path from another optical transmission terminal station, a first optical signal switch having ''M1'' ports and ''N1'' ports, through which the optical signal can pass, a second optical signal switch having ''M2'' ports and ''N2'' ports, through which the optical signal can pass, and ''L'' optical signal repeaters, one end connected to the ''N1'' ports of the first optical signal switch, and the other end connected to the ''N2'' ports of the second optical switch. The ''N1'' and the ''N2'' ports are equal to ''L'' optical signal repeaters. The ''M1'' ports of the first optical signal switch connected to the one terminal, and the ''M2'' ports of the second optical signal switch connected to the other terminal are larger than, or equal to 2.
Description
The application is dividing an application of following application:
Denomination of invention: optical cross connection device and optical transmission system
Application number: 98103190.0
The applying date: on July 3rd, 1998
Technical field
The present invention relates to carry out the optical cross connection device and the optical-fiber network of the switching of light transmission path, particularly relate to optical cross connection device and the optical-fiber network that to realize economically from the fault restoration of optical-fiber network.
Background technology
In recent years, be used to make that extensively to be penetrated into the preparation of information capital construction in each corner of society for the so-called multimedia of representative by Internet and CATV etc. developed.For constructing of such advanced information society, just need make the transinformation that is equivalent to a user than increasing by leaps and bounds now.In the public network mains system of growing the big volume transport of distance, introduced the fiber optic network that can carry out the low decay transmission of wide bandwidth for this reason.In this mains system fiber optic network, can transmit the data that reach per second 10Gbit in an optical fiber.Like this, it is very big that transmission path fault brings influence of society, and the quality of keeping the network service when transmission path fault is very important.
As improving with effective utilization of the reliability of the corresponding network of transmission path fault and transmission path and safeguarding the scheme of utilization property, the research and development of optical cross connection device enliven, optical cross connection device, in a node of fiber optic network, be set between the optical fiber as light transmitter-receiver and transmission path, carry out the switching of the light transmission path that the input and output light signal of light transmitter-receiver connected.By this function, when in certain lit fiber for example, breaking down, two optical cross connection devices set at the two ends of this lit fiber switch to standby optical fiber to connection the other side of light transmitter-receiver, thus, just can overcome transmission path fault.
On the other hand, in the optical-fiber network of reality, between whole nodes, might not lay enough standby optical fiber.Therefore, when transmission path fault recovers, just need to use the standby optical fiber that between the node at the optical fiber two ends that fault takes place and the 3rd node, is laid, make light signal in the path of not breaking down, make a circulation to repair.In order to compensate decay, just require in optical cross connection device, to have the optical signal repeater function along with the optical cross connection device itself of the prolongationization of this circuitous transmission range and the 3rd node.This function realizes by optical signal repeater devices such as optical cross connection device built in light amplifier and playback repeaters.
As the optical cross connection device of such formation, for example, in communication branch of electronic information communication association in 1996 conference, the lecture collection of thesis, B-1070,555 pages of schemes of being put down in writing are known.In the conference of communication branch of electronic information communication association in 1996, the lecture collection of thesis, B-1083 has put down in writing the optical cross connection device that does not have the optical signal repeater function on 568 pages.
And, in communication branch of electronic information communication association in 1993 conference, the lecture collection of thesis, SB-8-1,4-371,372 pages of technology of being put down in writing are also known.
Summary of the invention
The purpose of this invention is to provide a kind of optical cross connection device and a kind of economic fault restoration of optical transmission system can realize to(for) transmission path fault that can effectively utilize standby optical fiber and optical signal repeater device.
Another object of the present invention provides a kind of optical cross connection device, can carry out the supervision of the light of the signal path in the device by state, when fault takes place, can carry out the identification of abort situation effectively.
Another object of the present invention provides a kind of optical cross connection device, use in the optical switch loop just often the use switching with standby two light transmission paths, can carry out the possibility that fault takes place any place the optical switch loop from failure diagnosis, and can seek the shortening of fault correction time.
And another object of the present invention provides a kind of optical transmission system, can use above-mentioned optical cross connection device to switch the other side or switch former side's light transmission path and optical cross connection device in the viability in optical switch loop and the affirmation of reparation.
First feature of the present invention is, a kind of optical cross connection device is provided, as flexibly connecting standby optical fiber and optical signal repeater device, connect the input of light input element and optical signal repeater device with the light signal switch unit, simultaneously, the output and the light output part that connect above-mentioned optical signal repeater device with the light signal switch unit.Wherein, has the light signal switch unit, can when interconnecting with standby optical fiber, the optical cross connection device with optical signal repeater device select the standby optical fiber that is connected with the optical signal repeater device, thus, just the optical signal repeater device need be on every standby optical fiber, do not prepared, and the cost degradation of optical cross connect can be realized.And, has the light signal switch unit that to select the optical signal repeater device that is connected with standby optical fiber, thus, even also can carry out switching under the situation about in the optical signal repeater device, breaking down immediately to normal optical signal repeater device, thereby, can realize the optical cross connection device that reliability is high.
Second feature of the present invention is that the circuit-switched optical cross connection device that uses the optical switch loop to carry out optical transmission signal comprises: set optical signal monitor unit between optical transmission signal input unit and above-mentioned optical switch loop; By built-in signal source or outside source for example the supervision supplied with of the standby optical transmission portion of optical transmission terminal exchange device send to unit in the signal line with light signal.
The 3rd feature of the present invention is that the circuit-switched optical cross connection device that uses the optical switch loop to carry out optical transmission signal comprises: set optical signal monitor unit between optical transmission signal input unit and above-mentioned optical switch loop; Set optical signal monitor unit between above-mentioned optical switch loop and optical transmission signal output unit, thus, further has such function: use the output of above-mentioned two optical signal monitor unit, come the input part in comparison optical switch loop and the optical transmission signal state of output unit, carry out the failure diagnosis in above-mentioned optical switch loop thus.
Optical cross connection device further comprises: use and standby two optical switch loops of preparing when usual; Selecting respectively, the input to above-mentioned optical switch loop is above-mentioned optical transmission signal or monitors first optical switch element of using light signal; Selection is optical transmission line or second optical switch element of optical signal monitor unit from the output the other side in above-mentioned two optical switch loops respectively, thus, use the output that monitors with light signal and optical signal monitor unit, further having the optical switch loop is the discriminant function of the abort situation when confirming function and fault generation normally.
And, optical cross connection device when usual to standby optical transmission line transmitting monitoring light signal, when fault to the optical transmission line transmitting monitoring light signal that just often uses, thus, has such function: use to monitor with light signal to confirm that just often standby optical transmission line is normal, and the optical transmission line that affirmation is just often used when fault is repaired.In the above-described configuration, of the supervision of the light of the signal path in the device can be carried out, when fault takes place, distinguishing of abort situation can be carried out effectively by state.By the supervision signal optical source is set, use in the optical switch loop in use just often and two standby light transmission paths switchings, can realize the possibility that fault takes place any side the optical switch loop from failure diagnosis, and can expect the shortening of fault correction time.
According to the present invention, can further use supervision to monitor in the optical cross connection device or the state of optical transmission line with light signal, can realize switching the other side or switch former side's light transmission path and optical cross connection device in the viability in optical switch loop and the affirmation of reparation.
The 4th feature of the present invention is, optical transmission system comprises a plurality of optical cross connection devices and the light transmission path that is connected each optical cross connection device, above-mentioned optical cross connection device comprises: the first light signal switching circuit and the second light signal switching circuit have a plurality of smooth transmitter-receivers and are connected on a plurality of smooth transmitter-receivers and the port that light signal can pass through; Optical signal repeater loop, a side are connected on the port of the first light signal switching circuit, and the other end is connected on the port of the second light signal switching circuit.Thus, along with the generation of fault, the light transmitter-receiver communicates by the light transmission path of having removed the fault light transmission path.Wherein, the optical cross connection device of the application of the invention, just can in optical transmission system is all, reduce optical signal repeater device quantity, and can realize quick reparation with respect to the fault of optical signal repeater device, and then, can realize effective utilization of standby optical fiber, therefore, can high reliability and realize optical transmission system economically.
These and other purpose, advantage and feature of the present invention will be in conjunction with the drawings to the description of embodiments of the invention and further specified.In these accompanying drawings:
Description of drawings
Fig. 1 is the block diagram of an embodiment of expression optical cross connection device of the present invention;
Fig. 2 is the block diagram of another example of expression optical cross connection device;
Fig. 3 is the block diagram of another example of expression optical cross connection device;
Fig. 4 is the block diagram of another example of expression optical cross connection device;
Fig. 5 is the block diagram of another example of expression optical cross connection device;
Fig. 6 is the block diagram of another example of expression optical cross connection device;
Fig. 7 is the block diagram of another example of expression optical cross connection device;
Fig. 8 is the block diagram of another example of expression optical cross connection device;
Fig. 9 is the block diagram of another example of expression optical cross connection device;
Figure 10 is the block diagram of another example of expression optical cross connection device;
Figure 11 is the block diagram of another example of expression optical cross connection device;
Figure 12 A, Figure 12 B are system's pie graphs of expression optical transmission system of the present invention;
Figure 13 is system's pie graph of another example of expression optical transmission system.
Embodiment
Embodiments of the invention are described with reference to the accompanying drawings.
Fig. 1 is first embodiment of optical cross connection device of the present invention.In Fig. 1, optical cross connection device 1A is made of optical switch loop 10-1 and 10-2, the light signal input and output 12-1 of portion and 12-2 and at least one image intensifer 11.The input of optical switch loop 10-1 is connected with the light signal input and output 12-1 of portion, the output of optical switch loop 10-1 is connected with the input of optical switch loop 10-2 or the input of image intensifer 11, the output of image intensifer 11 is connected with the input of the optical switch loop 10-2 that is not connected with the output of optical switch loop 10-1, and the output of optical switch loop 10-2 is connected with the light signal input and output 12-2 of portion.Monitor that control part 14 carries out the control in the supervision of optical switch loop 10-1,10-2 and image intensifer 11.Optical switch loop 10-1 has the M that is connected with the light signal input and output 12-1 of portion
1Individual port; The N that is connected with optical switch loop 10-2 with image intensifer 11
1Individual port.Equally, optical switch loop 10-2 has the M that is connected with the light signal input and output 12-2 of portion
2Individual port; The N that is connected with optical switch loop 10-1 with image intensifer 11
2Individual port.
Fig. 2 is the block diagram of another example of expression optical cross connection device.In Fig. 2, optical cross connection device 1B comprises: light input part (12-1) Ts1～Tsn that is connected with optical transmitter; The light output part that is connected with optical receiver (12-1) Tj1～Tjn; With existing light output part (12-2) Ws1～Wsn and light input part (12-2) Wj1～Wjn that is connected with optical fiber; Light output part (12-3) Rs1～Rsm that is connected with standby optical fiber and light input part (12-4) Rj1～Rjm; The optical switch loop 10-1 of 2n output of n input; The optical switch loop 10-2 of n output of 2n input; The optical switch loop 10-3 of n output of m input; The optical switch loop 10-4 of 2m output of m input; The optical switch loop 10-5 of m output of n input; The optical switch loop 10-6 of m output of 2m input; The optical switch loop 10-7 of k output of m input; The optical switch loop 10-8 of m output of k input; K image intensifer 11; Carry out the inside and outside supervision of optical cross connection device and the supervision control part 14 of control.Optical cross connection device 1A, 1B are twocoueses.
At first, the elemental motion to the optical cross connection device 1B shown in the figure describes.Usually, optical switch loop 10-1 is connected respectively to n the light signal of being imported from light input part Ts1～Tsn from optical transmitter on light output part Ws1～Wsn.Relative therewith, when monitoring that control part 14 detects the fault of the optical fiber that is connected with light output part Ws1, optical switch loop 10-1 is by switching to optical switch loop 10-5 to the light signal from light input part Ts1 from the control signal that monitors control part 14.Optical switch loop 10-6 is connected respectively on light output part Rs1～Rsm from from the signal of optical switch loop 10-5 with from selecting an output the signal of optical switch loop 10-8.Optical switch loop 10-5 and 10-6 are by outputing to the light signal from optical switch loop 10-1 among among the light output part Rs1～Rsm that is connected with the optical fiber that has been identified viability one from the control signal that monitors control part 14.
The following describes: optical cross connection device 1B is on the roundabout that restoration after a failure uses, as restoring the action of selecting the optical fiber that is connected with the light input part Rjl optical cross connection device 1B with the light output part Rsm optical fiber that is connected the time with circuitous circuit.Optical switch loop 10-4 is exporting to optical switch loop 10-7 from the light signal of light input part Rj1.Optical switch loop 10-7 is input to being confirmed to be in the image intensifer that can connect normally in k the image intensifer 11 to light signal.The light signal that is enlarged into predetermined power is exported from light output part Rsm by optical switch loop 10-8 and 10-6.Monitoring that control part 14 is known, is not that special loop constitutes selecting on the optical fiber, can constitute like that by existing.
Wherein, image intensifer is connected on the standby optical fiber by optical switch loop 10-7 and 10-8.The number k of image intensifer does not need and equates with the number of the light input part Rj1～Rjm of optical cross connection device 1 or the number of the standby optical fiber that light input part Rj1～Rjm is connected.Therefore, cost and reliability that optical-fiber network is all can be considered, the design of optical cross connection device more flexibly can be realized.
Fig. 3 is another embodiment of optical cross connection device 1C of the present invention.In the present embodiment, in the formation of the Fig. 2 that represents second embodiment, optical switch loop 10-1～10-8 is replaced into an optical switch matrix 10.According to present embodiment, can connect light signal input and output 12-1 of portion and the light signal input and output 12-2 of portion more neatly.
As an alternative embodiment of the invention, in Fig. 4, represented to be applicable to the formation example of optical cross connection device 1 that carries out the optical-fiber network of transmitted in both directions with an optical fiber.In Fig. 4, optical cross connection device 1D comprises existing with interface portion 15; Spare interface portion 16; Optical switch loop portion 17 and supervision control part 14.Now comprise light output input part T1～T10 and W1～W10, optical switch loop 10-a, light monitoring unit 13-1 with interface portion 15.Spare interface portion 16 comprises the light input and output R1～R5 of portion, light monitoring unit 13-2.Optical switch loop portion 17 comprises optical switch loop 10-b～f, image intensifer 11.
In optical cross connection device 1D shown in Figure 4, by controlling optical switch loop 10-a～10-c with supervision control part 14, can export input part T1～T10 to light and be connected respectively on light output input part W1～W10, perhaps, be connected respectively on any of the light input and output R1～R5 of portion.Can interconnect the light input and output R1～R5 of portion respectively by combination arbitrarily by control optical switch loop 10-c～10-f with supervision control part 14.For example, can export to the light input and output R5 of portion to the light signal of being imported from the light input and output R1 of portion by control optical switch loop 10-c, 10-d, 10-e, 10-f.At this moment, by optical switch loop 10-d, even the time, always to the input side light conducting signal of image intensifer 11-1,11-2 from any input optical signal of the light input and output R1～R5 of portion.And, by optical switch loop 10-e, 10-f, can select to be connected to any of light output input part R1～R5 of image intensifer 11-1,11-2.That is,, just can reduce image intensifer quantity owing to can come shared two image intensifer 11-1,11-2 by 5 standby optical fiber that are connected with the light input and output R1～R5 of portion.
In the present embodiment, the quantitaes of the light input and output of optical cross connection device 1D amount under 25 the situation, in fact, can and lay fiber count, desired return rate decides according to the scale of network.In the present embodiment, though the image intensifer quantitaes 2 situation,, also can be and set image intensifer quantity arbitrarily according to desired economy and return rate.And, by time amplifier quantity is more than 1/2 of the light input and output number of spare interface portion 16, group for light input and light output, with respect at least one image intensifer, thus, can promptly solve any the hindering of the caused standby light transmission path of fault of the image intensifer that is connected optical switch loop 10-e and 10-f.
In order do not need to be adapted to the recovery route of optical signal repeater, can be only with optical switch loop 10-e and image intensifer that 10-f is connected in several optical fiber that become.The optical switch loop 10-b～10-f of Shi Yonging can be an optical switch matrix of 14 inputs, 15 outputs in the present embodiment.Wherein, add up to W if be connected showing on the optical cross connection device 1 with optical fiber, standby optical fiber adds up to R, and installing built-in image intensifer number is k, and the size that then can be replaced into the optical switch loop of optical switch loop 10-b～10-f can be minimum (W+2k) individual input R output.
As an alternative embodiment of the invention, in Fig. 5, represented existing interface portion 15, optical switch loop portion 17, the spare interface portion 16 of using shown in Figure 4.
In now using interface portion 15,1 input * 2 output optical switch loops are set respectively between light output input part T1～T10 and light output input part W1～W10, and connection the other side of light output input part T1～T10 switches to light output input part W1～W10 or the light input and output R1～R5 of portion.Optical switch loop portion 17 is made of 5 inputs * 5 output optical switch loop 10-g, 1 input * 4 output optical switch loop 10-h, 1 input * 5 output optical switch loop 10-e and 10-f1, image intensifer 11, as all, constitute the optical switch loop of 10 inputs, 5 outputs.
In the present embodiment, optical cross connection device 1E as can be suitable for transmitted in both directions 15 the input 15 output the optical switch loops and move, but, between light output input part T1～T10 and light output input part W1～W10, only use one section in 1 input * 2 output optical switch loops as switch existing with and standby optical switch loop, therefore, compare with the situation of the optical switch matrix that uses n * m type, can reduce significantly with insertion now and lose with the corresponding optical cross connection device 1 of light transmission path.For example, in the existing square way with optical fiber that is connected with optical cross connection device is D, the existing of each Fang Lu is A with fiber count, the standby fiber count of each Fang Lu is R, built-in image intensifer quantity is under the situation of k, can the optical switch of optical switch loop 10-g, import k the optical switch of exporting to optical switch loop 10-e and 10-f as D respectively optical switch loop 10-g as the optical switch that A D imports D output as D (A+2) individual input R output.
More than Shuo Ming optical cross connection device has the handoff functionality of the such physical medium of optical fiber, and therefore, with the kind of light signal in the medium, promptly transmission code and modulation system and multiplexing number of wavelengths etc. are irrelevant, just can realize above-mentioned functions.
In the above-described embodiments, though represented to use the example of image intensifer as the optical signal repeater device,, even the playback repeater, effect of the present invention is identical.
For concrete optical switch loop, for example, because optical switch loop 10-1 and the 10-2 of Fig. 2; The optical switch loop 10-a of Fig. 4, Fig. 5 etc. is inserted in the used transmission system, just can reduce as far as possible inserting loss.Such optical switch loop is to realize inserting the following optical fiber movable type optical switch of loss 1dB etc. with the optical switch of 1 input * 2 outputs.
Fig. 6 is another example of expression optical cross connection device 1F of the present invention.In Fig. 6, the 24th, the optical signal monitor loop, the 25th, light signal inserts the loop, and the 10th, the optical switch loop, 12-1 and 12-2 are light input and output portions.
Optical cross connection device 1F shown in Figure 6 comprises: the light signal input and output 12-1 of portion, optical switch loop 10, the light signal input and output 12-2 of portion, light signal insert loop 25, optical signal monitor loop 24.This optical cross connection device 1F, by control optical switch loop 10, each optical transmission signal that for example 3 optical transmitters from be arranged on the optical transmission terminal exchange device are imported through the light signal input and output 12-1 of portion sends in 3 transmission lines of the circuit that is defined as just often using in 6 optical transmission lines (optical fiber) for example by the light signal input and output 12-2 of portion, equally, can be on every platform that is connected in 3 optical receivers that are arranged in the optical transmission terminal exchange device of 3 transmission lines of transmission optical transmission signal in 6 optical transmission lines.Like this, optical cross connection device 1F is the key element that limits direction in inside, is suitable for transmitted in both directions.
By constituting by the optical cross connection device 1F of Fig. 6, when supervision is offered light signal insertion loop 25 with light signal, light signal inserts loop 25 differences and uses light signal from the light signal and the supervision of the information in optical switch loop 10, and the 12-2 of portion sends optical transmission line to by the light signal input and output.The optical cross connection device that is connected the receiver side on this optical transmission line receives the information distinguished with light signal or monitor and use light signal, optical signal monitor loop 24 identification is that information is with light signal or monitor and use light signal, by monitoring the level of this light signal, can detect the fault of transmission line.
Optical cross connection device 1F shown in Figure 6, when breaking down in arbitrary at the circuit that just often uses, light output the other side switched to arbitrary of 3 transmission lines that are confirmed as extension wire in 6 optical transmission lines, when the circuit that just often uses that breaks down restores, can carry out switchback to the optical transmission signal of this circuit that just often uses.
Optical cross connection device 1F shown in Figure 6, use built in light signal source or external optical signal to be used as monitoring and use light signal, the light signal that outlet side in optical switch loop 10 is provided for sending from an end that switches the other side or switch former side's optical transmission line this light signal inserts loop 25, and the input side in optical switch loop 10 is provided with the optical signal monitor loop 24 of supervision from the optical transmission signal of optical transmission line.Thus, optical cross connection device 1F can use built in light signal source or external optical signal as monitoring the state that monitors optical transmission line with light signal.The output of above-mentioned built in light signal source can be by being arranged on the linear optical repeater in the transmission line or the light signal of playback repeater.
For easy to understand the present invention in Fig. 6, light signal input optical signal monitoring circuit 24 with information, and then be input to M the port side in optical switch loop 10, transmission line is selected in optical switch loop 10, inserts loop 25 from N the port side in optical switch loop 10 by light signal and delivers to other the transmission line.On this basis, the light signal that can be connected in series between M port side and optical signal monitor loop 24 inserts loop 25.Equally, can insert the optical signal monitor loop 24 that is connected in series between loop 25 and the light signal input and output 12-2 of portion at light signal in N the port side in optical switch loop 10.
And, optical signal monitor loop 24 and light signal can be set in optical cross connection device 1A shown in Figure 1 insert loop 25, and, can between optical switch loop 10-1 and 10-2 and light signal input and output 12-1 of portion and 12-2, be connected be connected in series optical signal monitor loop 24 and light signal respectively and insert the part in loop 25.Optical signal monitor loop 24 is made of photodetector and optical coupler, and light signal inserts loop 25 and is made of optical coupler and optical switch.The port that optical switch loop 10 has is identical in following examples.
Though optical cross connection device 1A, the optical transmission line way that is connected is totally 12 of 6 of 6 of input side and outlet sides, but, in the present invention, the transmission line way that is connected is arbitrarily, effect is not limited in this number, can consider to determine quantity and the fiber count of being laid, the desired survival rate etc. of the transmitter-receiver that is connected with optical cross connection device.This any embodiment to following explanation is identical.
Fig. 7 is the block diagram of the configuration example of expression another optical cross connection device 1G of the present invention.In Fig. 7, the 21st, the light transmitter-receiver that just often uses, the 22nd, standby smooth transmitter-receiver, the 31st, light signal duplexure, other label are the parts identical with Fig. 6.
Optical cross connection device 1G shown in Figure 7 uses light signal from the standby smooth transmitter-receiver 22 of optical transmission terminal exchange device as the supervision signal source among the optical cross connection device 1F shown in Figure 6.That is, optical cross connection device 1G shown in Figure 7 connects two light transmitter-receiver 21 and standby smooth transmitter-receivers 22 of just often using, connects 6 optical transmission signals transmission optical fiber at outlet side; Connect 6 optical transmission signals reception optical fiber at input side.
And, then in running order following owing to standby smooth transmitter-receiver 22 can switch always just often, send received frame signal and control signal always.Send with, receive in totally 6 optical fiber of usefulness, in 3, have light signal at least always.
Optical cross connection device 1G shown in Figure 7 inserts loop 25 by being arranged on light signal duplexure 31 among the optical cross connection device 1G and light signal, can be to sending the output that sends out the standby smooth transmitter-receiver 22 that light signal sends with optical fiber.
In the example of Fig. 7, because switches light switch loop 10 does not send with optical fiber to arbitrarily and sends the supervision light signal, therefore, can not exert an influence, can switch the supervision that the other side is switched former side's optical transmission line by constituting of optical switch loop 10 to the optical transmission signal state.
Fig. 8 is the block diagram of the formation example of expression another optical cross connection device 1H of the present invention.In Fig. 8,24-1,24-2 are the optical transmission signal monitoring circuits, and other label is the parts identical with Fig. 6.
Optical cross connection device 1H shown in Figure 8 comprises optical transmission signal monitoring circuit 24-1, the optical switch loop 10 of the light signal input and output 12-1 of portion, input side, optical transmission signal monitoring circuit 24-2, the light signal input and output 12-2 of portion of outlet side.And optical transmission signal monitoring circuit 24-1 is arranged between light signal input and output 12-1 of portion and the optical switch loop 10; Optical transmission signal monitoring circuit 24-2 is arranged between optical switch loop 10 and the light signal input and output 12-2 of portion.
Optical cross connection device 1H according to formation as described above, optical transmission signal monitoring circuit 24-1 carries out being input to from the light signal input and output 12-1 of portion the Stateful Inspection of the optical transmission signal the optical cross connection device 1H, and optical transmission signal monitoring circuit 24-2 carries out being undertaken that circuit switches and the Stateful Inspection of the optical transmission signal exported from the light signal input and output 12-2 of portion by optical switch loop 10.By the relatively output of these optical transmission signal monitoring circuits 24-1,24-2, can carry out the failure diagnosis in optical switch loop 10.
Optical transmission signal monitoring circuit 24-1,24-2 can be made of the optical coupler and the photodetector of for example 1 input, 2 outputs.Also can be constituted by the optical coupler and the photodetector of for example 2 inputs, 2 outputs.In the latter case, optical cross connection device is suitable for transmitted in both directions.
Fig. 9 is the block diagram of the formation example of expression another optical cross connection device 1J of the present invention.In Fig. 9,24-3,24-4 are the optical signal monitor loops, the 33rd, and control part, other label representatives part identical with Fig. 1.Optical cross connection device 1J shown in Figure 9 is the example of optical cross connection device that has the fault diagnosis functions in optical switch loop 10 by relatively optical transmission signal monitoring circuit 24-1,24-2,24-3,24-4.
Optical cross connection device 1J shown in Figure 9 is connected on 3 light transmitter-receivers of optical transmission terminal exchange device, 6 output sidelight special lines, 6 the input side optical transmission lines.Optical transmission signal monitoring circuit 24-1 is arranged between light signal input and output 12-1 of portion and the optical switch loop 10, optical transmission signal monitoring circuit 24-2 is arranged between optical switch loop 10 and the light signal input and output 12-2 of portion, optical signal monitor loop 24-3 is arranged between light signal input and output 12-1 of portion and the optical switch loop 10, and optical signal monitor loop 24-4 is arranged between light signal input and output 12-2 of portion and the optical switch loop 10.Thus, optical cross connection device 1J is applicable to transmitted in both directions.
Constitute like that according to above-mentioned, come the output of comparison optical transmission signal monitoring circuit 24-1 and 24-2 by control part 33, the connection status in the optical switch loop 10 that keeps by the external device (ED) outside reference control part 33 or the optical cross connection device can realize carrying out the fault detection and diagnosis in optical switch loop 10 of the switching of light signal circuit.
Figure 10 is the block diagram of the formation example of another optical cross connection device of expression 1K.In Figure 10,10-1,10-2 are the optical switch loops, the 24th, and the optical signal monitor loop, the 26th, monitor and use optical signal source, the 34th, input optical signal diverter switch portion, the 35th, output light signal diverter switch portion, other labels are parts identical with Fig. 6.
Optical cross connection device 1K shown in Figure 10 comprises the light signal input and output 12-1 of portion, input optical signal diverter switch portion 34, monitor with optical signal source 26, optical switch loop 10-1 and 10-2, output light signal diverter switch portion 35, optical signal monitor loop 24, the light signal input and output 12-2 of portion, in Figure 10 the not shown control part 33 identical with Fig. 9.Input optical signal diverter switch portion 34 and output light signal diverter switch portion 35 can be made of the optical switch of for example a plurality of 2 inputs, 2 outputs.Like this, optical cross connection device 1K is applicable to transmitted in both directions.
Optical cross connection device 1K shown in Figure 10, high reliability for optical cross connection device 1K, and be arranged in the fault in optical switch loop, prepare the optical switch loop 10-1 of use just often and standby optical switch loop 10-2, by input optical signal diverter switch portion 34 and the 35 interlocks action of output light signal diverter switch portion, the optical switch loop of can the switches light transmission signals passing through.
According to above-mentioned formation, monitor that the output with optical signal source 26 is transfused in the input optical signal diverter switch portion 34, the input in optical signal monitor loop 24 is connected with output light signal diverter switch portion 35, therefore, the circuit that carries out optical transmission signal at the optical switch loop 10-1 that just often uses is between transfer period, can be from monitoring that the supervision with optical signal source 26 sends optical signal monitor loop 24 with light signal to by optical switch loop 10-2.Can use optical signal monitor loop 24 to confirm optical switch loop 10-2 operate as normal.
And, distinguish and switch under the situation of standby optical switch loop 10-2 in the fault of the optical switch loop 10-1 that just often uses, can use from monitoring and carry out the location of abort situation with light signal and optical signal monitor loop 24, and can not exert an influence optical transmission signal with the supervision of optical signal source 26.
Figure 11 is the block diagram of the formation example of expression another optical cross connection device 1L of the present invention.Label is identical with other embodiment among Figure 11.
Optical cross connection device 1L shown in Figure 11, with respect to optical cross connection device 1L shown in Figure 10, at the back segment of the light signal input and output 12-1 of portion and the back segment of output light signal diverter switch portion 35 optical signal monitor loop 24 is set, monitoring that the back segment with optical signal source 26 is provided with the light signal duplexure 31 that carries out branch with the output of optical signal source 26 monitoring, supervision is being set with light signal insertion loop 25 at the leading portion of the light signal input and output 12-2 of portion.Like this, optical cross connection device 1L is applicable to transmitted in both directions.
In optical cross connection device 1L shown in Figure 11, the output in two the optical signal monitor loops 24 of control part 33 by relatively being arranged on just often the 10-1 both sides, optical switch loop of using monitors the having or not of fault of optical switch loop 10-1.Be connected the supervision light signal of optical signal monitor loop 24 supervision of the back segment of exporting light signal diverter switch portion 35, thus, can confirm that standby optical switch loop 10-2 normally works by standby optical switch loop 10-2.
When control part 33 has diagnosed the fault of the optical switch loop 10-1 that just often uses to take place, make input optical signal diverter switch portion 34 switch to standby optical switch loop 10-2 side to optical transmission signal with output light signal diverter switch portion's 35 interlocks.At this moment, the standby optical switch loop 10-2 of control part 33 controls makes optical transmission signal normally carry out the circuit switching, simultaneously, monitor with optical signal source 26 and optical signal monitor loop 24 and the optical switch loop 10-1 that is diagnosed as the fault generation, just can carry out the locking of abort situation by connecting.
When breaking down in the optical transmission line of outlet side, optical cross connection device 1L action shown in Figure 11 is so that sent in the optical transmission line of fault generation by light signal insertion loop 25 with light signal by the supervision of 31 branches of light signal duplexure.Thus, the optical cross connection device 1L of other relevant with this optical transmission line fault, by monitor this supervision light signal with the optical signal monitor loop, just can promptly confirm the recovery of the optical transmission line that fault takes place, and can realize recovery rapidly to just often.
As the optical switch loop of the various embodiments described above, can use the light-guide wave path movable type optical switch loop that comprises optical coupler, and image intensifer can use optical-fiber type image intensifer, semi-conductor type image intensifer, playback repeater.
Use Figure 12 A, 12B to come the embodiment of the optical transmission system that uses optical cross connection device of the present invention is described below.Figure 12 A is the optical transmission system that is made of optical cross connection device 1-1～1-3 of the present invention, light transmitter-receiver 20-1～20-3, used optical fiber 30, standby optical fiber 40-1 and 40-2.
Wherein, for the briefly elemental motion of the transmission line failure recovery of Mingguang City's transmission system, each optical cross connection device 1 is represented annexation with 1 fiber bundle respectively.Two light transmitter-receiver 20-1 are connected by used optical fiber 30 with 1-3 by optical cross connection device 1-1 respectively with 20-2.Meanwhile, connect by standby optical fiber 40-1, optical cross connection device 1-2, standby optical fiber 40-2.
When the fault that detects used optical fiber 30 as optical cross connection device 1-1 and 1-3 takes place, the light signal of propagation in this optical fiber switched to standby optical fiber 40-1 and 40-2.In optical cross connection device 1-2, can interconnect standby optical fiber 40-1 and 40-2.
According to the present invention, the optical signal repeater device that is built among optical cross connection device 1-1～1-3 is connected with standby optical fiber by the optical switch loop, therefore, even in standby optical fiber, break down and then switch under the situation in other the standby optical fiber, need in each standby optical fiber, not prepare the optical signal repeater device yet.Even under the situation about breaking down in the optical signal repeater device in being built in optical cross connection device,, therefore can realize effective utilization of standby optical fiber owing to can promptly switch in other optical signal repeater devices of having confirmed viability.
For simplicity of illustration, as can be seen: omitted the standby optical fiber that is pulled between optical cross connection device 1-1 and the optical cross connection device 1-3, be pulled in existing between optical cross connection device 1-1 and the optical cross connection device 1-2 with optical fiber, be pulled in showing between optical cross connection device 1-2 and the optical cross connection device 1-3 and use optical fiber.
Figure 12 B is to use another embodiment of the optical transmission system of optical cross connection device of the present invention.Wherein, optical transmission system constitutes mesh by 4 nodes.Wherein, at first, consider from the situation of light transmitter-receiver 20-1 to light transmitter-receiver 20-4 transmitting optical signal.Just often transmit with used optical fiber 30-1.When in used optical fiber 30-1, breaking down, select cut-in stand-by optical fiber 40-1 by optical cross connection device 1-1, select cut-in stand-by optical fiber 40-2 by optical cross connection device 1-4.And, in optical cross connection device 1-2, standby optical fiber 40-1 and 40-2 are interconnected by the optical signal repeater device.The direction of the light signal of this moment is to 40-2 from standby optical fiber 40-1.
Consider to transmit to light transmitter-receiver 20-1 the situation of light signal below from light transmitter-receiver 20-3.Just often, by now transmitting, when in now with optical fiber 30-2 and standby optical fiber 40-3, breaking down, select cut-in stand-by optical fiber 40-4 by optical cross connection device 1-3 with optical fiber 30-2; Select cut-in stand-by optical fiber 40-2 by optical cross connection device 1-4; Select cut-in stand-by optical fiber 40-1 by optical cross connection device 1-2.At this moment, standby optical fiber 40-1 and 40-2 are interconnected by the optical signal repeater device by optical cross connection device 1-2, the transmission direction of light signal is to 40-1 from standby optical fiber 40-2.
Optical cross connection device 1-1～the 1-4 of the application of the invention, the route that can resemble the softness when realizing restoring above-mentioned set and effective utilization of standby optical fiber.
As can be seen:, suitably omitted the standby optical fiber that is pulled between the optical cross connection device, now used optical fiber for simplicity of illustration.
Figure 13 is to use optical cross connection device and block diagram that the another kind of the optical transmission system that constitutes constitutes.In Figure 13,20-1,20-2 are the light transmitter-receivers, the 30th, and used optical fiber, the 40th, standby optical fiber.
Optical transmission system shown in Figure 13, by a plurality of used optical fiber 30 and a plurality of standby optical fiber 40 two optical cross connection device 1-1,1-2 being connected between light transmitter-receiver 20-1,20-2 are coupled together and to constitute, can use the optical cross connection device 1 in the above-mentioned various embodiments of the present invention to be used as optical cross connection device 1-1,1-2.
Above-mentioned optical transmission system can monitor the state of optical transmission line in optical cross connection device, therefore, can switch the other side or switch former side's optical transmission line and optical cross connection device in the viability in optical switch loop and the affirmation of recovery, can seek the raising of the reliability of system.
Optical transmission system shown in Figure 13 uses two optical cross connection device 1-1,1-2 to constitute, the present invention also can use more optical cross connection device and optical transmission terminal exchange device, by being formed the network that connects into latticed or chain between each optical cross connection device by the formed transmission line of optical fiber (comprising existing usefulness, standby).
Claims (3)
1, a kind of optical cross connection device, have the side terminal on the transmission line of the optical transmission terminal office that is connected My World and be connected from the opposite side terminal on the transmission line of the opposing party's optical transmission terminal office, when from a direction the opposing party with from other direction one side's transmitting optical signal, can switch above-mentioned transmission line, it is characterized in that, comprising:
The light signal switching device shifter has first port and have second port on opposite side on a side;
With the light transmitter-receiver,
The part of a plurality of first ports is connected with a side terminal,
The part of a plurality of second ports is connected with the opposite side terminal,
Other a plurality of ports of first port are connected with the light transmitter-receiver with a plurality of ports of second port.
2, a kind of optical cross connection device, have the side terminal on the transmission line of the optical transmission terminal office that is connected My World and be connected from the opposite side terminal on the transmission line of the opposing party's optical transmission terminal office, when from a direction the opposing party with from other direction one side's transmitting optical signal, can switch above-mentioned transmission line, it is characterized in that, comprising:
The light signal switching device shifter has first port and have second port on opposite side on a side;
The first optical signal monitor device is connected between an above-mentioned side terminal and above-mentioned first port transmission state of monitoring light signals;
The second optical signal monitor device is connected between above-mentioned opposite side terminal and above-mentioned second port transmission state of monitoring light signals; With
Control part is connected on the above-mentioned first and second optical signal monitor devices, carries out the diagnosis of device internal fault by the transmission state that compares light signal.
3, a kind of optical cross connection device, have the side terminal on the transmission line of the optical transmission terminal office that is connected My World and be connected from the opposite side terminal on the transmission line of the opposing party's optical transmission terminal office, when from a direction the opposing party with from other direction one side's transmitting optical signal, can switch above-mentioned transmission line, it is characterized in that, comprising:
The first light signal switching device shifter that normal transmission is used has first port and have second port on opposite side on a side;
The second light signal switching device shifter of standby transmission usefulness has the 3rd port and have the 4th port on opposite side on a side;
The first light signal selector switch, one side is connected on above-mentioned first port and the 3rd port, opposite side is connected on the above-mentioned side terminal, and, above-mentioned opposite side is connected on the light signal feedway of the light supervisory signal that the action that monitors the above-mentioned first and second light signal switching device shifters is provided, and selecting to the input of the first or second light signal switching device shifter is above-mentioned optical transmission signal or light supervisory signal;
The second light signal selector switch, one side is connected on above-mentioned second port and the 4th port, opposite side is connected on the above-mentioned side terminal, and, above-mentioned opposite side is connected on the light signal feedway of the light supervisory signal that the action that monitors the above-mentioned first and second light signal switching device shifters is provided, and selecting from the output of the first or second light signal switching device shifter is above-mentioned optical transmission signal or light supervisory signal.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17834097A JP3854372B2 (en) | 1997-07-03 | 1997-07-03 | Optical cross-connect device |
| JP178340/97 | 1997-07-03 | ||
| JP18796697A JP3716078B2 (en) | 1997-07-14 | 1997-07-14 | Optical cross-connect device and optical network |
| JP187966/97 | 1997-07-14 |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98103190 Division CN1244206C (en) | 1997-07-03 | 1998-07-03 | Optical crossconnect apparatus and optical transmission system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1790952A true CN1790952A (en) | 2006-06-21 |
| CN1790952B CN1790952B (en) | 2010-05-05 |
Family
ID=16046788
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510137015 Expired - Fee Related CN1790952B (en) | 1997-07-03 | 1998-07-03 | Optical crossconnect apparatus and optical transmission system |
| CN 98103190 Expired - Fee Related CN1244206C (en) | 1997-07-03 | 1998-07-03 | Optical crossconnect apparatus and optical transmission system |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98103190 Expired - Fee Related CN1244206C (en) | 1997-07-03 | 1998-07-03 | Optical crossconnect apparatus and optical transmission system |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP3854372B2 (en) |
| CN (2) | CN1790952B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2310293A1 (en) * | 2000-05-30 | 2001-11-30 | Alan F. Graves | Photonic network node |
| GB0610819D0 (en) * | 2006-06-01 | 2006-07-12 | Polatis Ltd | A fast distributed automatic network optical fibre protection switching mechanism using combined local fibre fault detection and switching control |
| US20080285470A1 (en) * | 2007-05-18 | 2008-11-20 | Catherine Yuan | Determining An Active/Standby State From Service Readiness |
| MX343800B (en) * | 2012-03-01 | 2016-11-23 | Tyco Electronics Corp | Keying for mpo systems. |
| JP6104652B2 (en) * | 2013-03-11 | 2017-03-29 | 株式会社日立製作所 | Switching device and transmission system |
| CN115603801A (en) * | 2021-06-28 | 2023-01-13 | 华为技术有限公司（Cn） | All-optical cross device and wavelength selection switch |
| WO2023166593A1 (en) * | 2022-03-02 | 2023-09-07 | 日本電信電話株式会社 | Optical path switching node, optical fiber network, and test method for optical fiber network |
| WO2024069807A1 (en) * | 2022-09-28 | 2024-04-04 | 日本電信電話株式会社 | Optical communication device and optical communication pathway opening method |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01228328A (en) * | 1988-03-09 | 1989-09-12 | Fujitsu Ltd | Line switching system for transmission line |
| GB8910957D0 (en) * | 1989-05-12 | 1989-06-28 | Plessey Telecomm | Optical transmission apparatus |
| JPH0799816B2 (en) * | 1990-01-10 | 1995-10-25 | 富士通株式会社 | Protection line switching control method |
| JP2928046B2 (en) * | 1993-04-16 | 1999-07-28 | 日本電気株式会社 | Optical network and its fault recovery system |
-
1997
- 1997-07-03 JP JP17834097A patent/JP3854372B2/en not_active Expired - Fee Related
-
1998
- 1998-07-03 CN CN 200510137015 patent/CN1790952B/en not_active Expired - Fee Related
- 1998-07-03 CN CN 98103190 patent/CN1244206C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1205582A (en) | 1999-01-20 |
| JPH1127208A (en) | 1999-01-29 |
| CN1790952B (en) | 2010-05-05 |
| CN1244206C (en) | 2006-03-01 |
| JP3854372B2 (en) | 2006-12-06 |
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