CN100335923C - Line protector for four-fiber bidirectional optical amplification section of WDM optical transmission system - Google Patents
Line protector for four-fiber bidirectional optical amplification section of WDM optical transmission system Download PDFInfo
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- CN100335923C CN100335923C CNB2005100749355A CN200510074935A CN100335923C CN 100335923 C CN100335923 C CN 100335923C CN B2005100749355 A CNB2005100749355 A CN B2005100749355A CN 200510074935 A CN200510074935 A CN 200510074935A CN 100335923 C CN100335923 C CN 100335923C
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Abstract
The present invention relates to a line protecting device of a two-way four-fiber optical amplification section in an optical wavelength division multiplexing transmission system. The protecting device uses optical transmission lines of different routes between two optical transmission nodes to protect the optical transmission line of the other route by one optical transmission line, and is suitable for topology structures of various optical networks. The present invention is not limited by the capacity of the network and the relation of a stripping cascade. The transmission capacity of an optical transmission system can be used for service transmission, and has the advantage of low insertion loss. Thus, the complicated degree and the cost of the optical transmission system are largely reduced, and the adverse effect on the system generated by protection is reduced. Simultaneously, the optical transmission system has good maintainability.
Description
Technical field
The present invention relates to optical wavelength-division multiplex (WDM) transmission system, be specifically related to four-fiber bidirectional optical amplification section protective device in the optical WDM transmission system.
Background technology
Optical wavelength-division multiplex (WDM) transmission system comprises thick wavelength-division (CWDM), dense wavelength division (DWDM), Optical Add Drop Multiplexer (OADM) and light intersection (OXC) transmission system.Wherein, the signal of optical wavelength-division multiplex (WDM) equipment is by Optical Fiber Transmission.Reply owing to transmission signals has, generally all adopt two optical fiber of transmission in opposite directions to finish, in wave transmission system, particularly in long-distance optical transmission system, because optical fiber routing condition complexity, phenomenon of rupture happens occasionally, and this loss that it brought concerning the wavelength-division optical transmission system of having born the high-speed wideband communication traffic will be very huge.Require to have mentioned suitable height so in the transmission of carrier class communication service, just will protect.Generally all in the transmission network of utilizing Optical synchronization digital series (SDH) technology, protect.Recently, along with increasing rapidly of IP operation, the demand of directly transmitting the more weak signal of these autoprotection functions in the wavelength-division Optical Transmission Network OTN is just more and more.Simultaneously, many SDH signals also require wavelength-division system that enough protective capabilities can be provided.Various guard methods such as two fine unidirectional light-path protections like this,, two fine bi-directional light path protections, two fine unidirectional Optical Line Protection, two fine bi-directional light route protections and concurrent choosing receipts Optical Line Protection are just arisen at the historic moment.The protected mode of above-mentioned prior art has played good service protection effect really.Yet all there is such or such defective in above-mentioned various guard method; is the ring network as two fine unidirectional Optical Line Protection and two fine bi-directional light route protection modes except requiring system; also the girth to ring has comparatively strict restriction, thereby is only applicable to the Metropolitan Area Network (MAN) environment.And two fine unidirectional light-pathes protections, two fine bi-directional light path protection modes except also need to have two optical transmission chains sensible, also the light-path number restriction to protection is bigger, comparatively speaking, its equipment cost is higher, and is big too to taking of optical wavelength resources.The Optical Line Protection mode is received in concurrent choosing then has Insertion Loss big, and system link length and span are had problems such as bigger restriction.Because the wavelength-division optical transmission system applies to long distance line Optical Transmission Network OTN or local backbone mostly, system's looping or have two different transmission links not under a lot of situations.And consider and all many-sides such as the adaptability of technology all have necessity of further raising from optical channel utilization factor and system cost.
Summary of the invention
Purpose of the present invention just is to be provided for the four-fiber bidirectional optical amplification section protective device of optical WDM transmission system, overcome that above-mentioned prior art exists be subjected to the network topology structure restriction, be subjected to the optical transmission line length restriction, be subjected to the optical channel restricted number, problem that the optical channel utilization factor is low.Four-fiber bidirectional optical amplification section protective device of the present invention utilizes the optical transmission line of different routes between two optical transmission nodes, protects the optical transmission line of another route with an optical transmission line, and its technical advantage is fairly obvious.Because protective device of the present invention only relates to two light transmission routes between the optical amplifying section, so all can be suitable for various optical-fiber network topological structures, is not subjected to the restriction of network size and stripping cascade relation.Because protection optical channel or protection light passband needn't be set, the transmission capacity of optical transmission system just all can be used for professional transmission simultaneously.The most valuable is to design a transmission link that is used to protect purpose in addition; also optical amplifier apparatus that need not be other; and protective device of the present invention has the little advantage of the loss of insertion; this just can make the complexity of optical transmission system and cost greatly descend; reduce because the adverse effect that protection produces system also makes optical transmission system have good maintainability simultaneously.
A kind of optical transmission nodes four-fiber bidirectional optical amplifying section protective device that is used for of the present invention comprises on side's optical transmission nodes:
The monitoring and controlling channels optical multiplexer is used for sending protection and switching input end of photoswitch closing ripple from the monitoring and controlling channels light signal of luminous-power distributor and main optical path light signal from other equipment of this node, outputing to then;
Luminous-power distributor is used for the monitoring and controlling channels light signal from light monitor message processor is assigned as two-way, and one the tunnel is transferred to the monitoring and controlling channels optical multiplexer, and another road is transferred to send to protect switches another input end of photoswitch;
Send protection and switch photoswitch, be used for to switch to one of sending direction main optical transmission line road and the standby optical transmission line of sending direction road from the light signal of monitoring and controlling channels optical multiplexer, will switch to another road of sending direction main optical transmission line road and the standby optical transmission line of sending direction from the monitoring and controlling channels light signal of luminous-power distributor simultaneously;
Adjustable optical attenuator, be used for from the attenuated optical signal on receive direction main optical transmission line road to consistent with the standby optical transmission line receiving optical signals of receive direction power, the back optical signal transmission that will decay is then given to receive to protect and is switched photoswitch;
Receive protection and switch photoswitch, be used for to switch to from the light signal on one of adjustable optical attenuator and the standby optical transmission line of receive direction road one of monitoring and controlling channels optical branching filter and auxiliary channel input optical signal monitoring device, will switch to another of monitoring and controlling channels optical branching filter and auxiliary channel input optical signal monitoring device simultaneously from the light signal on another road of adjustable optical attenuator and the standby optical transmission line of receive direction;
The monitoring and controlling channels optical branching filter is used for monitoring and controlling channels light signal and main optical path light signal partial wave, and the monitoring and controlling channels light signal that then partial wave is gone out outputs to light monitor message processor and the main optical path light signal that partial wave goes out outputed to other equipment of this node;
Auxiliary channel input optical signal monitoring device is used to monitor from receiving protection and switches the monitoring and controlling channels light signal of photoswitch and lose or recover, and monitoring is transferred to the APS processing controller;
Light monitor message processor, be used to monitor from receiving protection and switch another road light signal of photoswitch and lose or recover, and handle from the information of monitoring and controlling channels light signal and be transferred to the APS processing controller and be used for protection switch messages and light monitor message from the APS processing controller are transferred to luminous-power distributor with monitoring and controlling channels light signal form;
The APS processing controller; be used to receive from the information of auxiliary channel input optical signal monitoring device with from the information of light monitor message processor; to analyze and the control transmission; the reception protection is switched the photoswitch execute protection and is switched; and will send; receive and protect the status information transmission of switching photoswitch also further to be transferred to the other side's node for light monitor message processor, the other side's optical transmission nodes that the APS processing controller sends in receiving from the other side's optical transmission nodes sends; receiving protection switches after the status information of photoswitch and sends in also corresponding this optical transmission nodes of adjustment; receive protection and switch the state of photoswitch.
Of the present invention another be used for optical transmission nodes four-fiber bidirectional optical amplifying section protective device, on side's optical transmission nodes, comprise:
The monitoring and controlling channels optical multiplexer is used for outputing to luminous-power distributor then with closing ripple from the monitoring and controlling channels light signal of light monitor message processor and main optical path light signal from other equipment of this node;
Luminous-power distributor is used for the light signal from the monitoring and controlling channels optical multiplexer is assigned as two-way, is transferred to respectively to send two input ends that photoswitch is switched in protection;
Send protection and switch photoswitch, be used for and switch to one of sending direction main optical transmission line road and the standby optical transmission line of sending direction road from one of two ways of optical signals of luminous-power distributor, will switch to another road of sending direction main optical transmission line road and the standby optical transmission line of sending direction from another of the two ways of optical signals of luminous-power distributor;
Adjustable optical attenuator, be used for from one road attenuated optical signal on receive direction main optical transmission line road to receive another road optical signal power consistent with the standby optical transmission line of receive direction, the back optical signal transmission that will decay is then given and is received protection and switch photoswitch;
Receive protection and switch photoswitch, be used for to switch to from the light signal on one of adjustable optical attenuator and the standby optical transmission line of receive direction road one of monitoring and controlling channels optical branching filter and auxiliary channel input optical signal monitoring device, will switch to another of monitoring and controlling channels optical branching filter and auxiliary channel input optical signal monitoring device from the light signal on another road of adjustable optical attenuator and the standby optical transmission line of receive direction;
The monitoring and controlling channels optical branching filter is used for monitoring and controlling channels light signal and main optical path light signal partial wave, and the monitoring and controlling channels light signal that then partial wave is gone out outputs to light monitor message processor and the main optical path light signal that partial wave goes out outputed to other equipment of this node;
Auxiliary channel input optical signal monitoring device is used to monitor from receiving protection and switches the light signal of photoswitch and lose or recover, and monitoring is transferred to the APS processing controller;
Light monitor message processor, be used to monitor from receiving protection and switch another road light signal of photoswitch and lose or recover, and handle from the information of monitoring and controlling channels light signal and be transferred to the APS processing controller and be used for the protection switch messages from the APS processing controller is transferred to the monitoring and controlling channels optical multiplexer with monitoring and controlling channels light signal form;
The APS processing controller; be used to receive from the information of auxiliary channel input optical signal monitoring device with from the information of light monitor message processor; to analyze and the control transmission; the reception protection is switched the photoswitch execute protection and is switched; and will send; receive and protect the status information transmission of switching photoswitch also further to be transferred to the other side's node for light monitor message processor, the other side's optical transmission nodes that the APS processing controller sends in receiving from the other side's optical transmission nodes sends; receiving protection switches after the status information of photoswitch and sends in also corresponding this optical transmission nodes of adjustment; receive protection and switch the state of photoswitch.
Another kind of the present invention is used for optical transmission nodes four-fiber bidirectional optical amplifying section protective device, comprises on side's optical transmission nodes:
Send protection and switch photoswitch, be used for to switch to one of sending direction main optical transmission line road and the standby optical transmission line of sending direction road from the monitoring and controlling channels light signal of light monitor message processor, will switch to another road of sending direction main optical transmission line road and the standby optical transmission line of sending direction from the main optical path light signal that this section is put other equipment simultaneously;
Adjustable optical attenuator, be used for from the attenuated optical signal on receive direction main optical transmission line road to consistent with the standby optical transmission line receiving optical signals of receive direction power, the back optical signal transmission that will decay is then given to receive to protect and is switched photoswitch;
Receive protection and switch photoswitch, be used for and switch to main optical path input optical signal monitoring device from adjustable optical attenuator with from the main optical path light signal on one of the standby optical transmission line of receive direction road, will switch to light monitor message processor from the monitoring and controlling channels light signal on another road of adjustable optical attenuator and the standby optical transmission line of receive direction simultaneously;
Main optical path input optical signal monitoring device is used to monitor losing or recovering of main optical path light signal, and monitoring result is transferred to the APS processing controller, and the main optical path light signal outputed to other equipment of this node;
Light monitor message processor, be used to monitor from receiving protection and switch the light signal of photoswitch and lose or recover, and handle from the information of monitoring and controlling channels light signal and be transferred to the APS processing controller and be used for sending protection and switching photoswitch being transferred to monitoring and controlling channels light signal form from the protection switch messages of APS processing controller;
The APS processing controller; be used to receive from the information of main optical path input optical signal monitoring device with from the information of light monitor message processor; analyze and the control transmission; the reception protection is switched the photoswitch execute protection and is switched; and will send; receive and protect the status information transmission of switching photoswitch also further to be transferred to the other side's node for light monitor message processor, the other side's optical transmission nodes that the APS processing controller sends in receiving from the other side's optical transmission nodes sends; receiving protection switches after the status information of photoswitch and sends in also corresponding this optical transmission nodes of adjustment; receive protection and switch the state of photoswitch.
Above-mentioned three kinds of four-fiber bidirectional optical amplifying section protective devices of the present invention is characterized in that: have identical protective device on the light amplification node at four-fiber bidirectional optical amplifying section two ends.
A kind of method that is used for the protection of light amplification node four-fiber bidirectional optical amplifying section that above-mentioned protective device of the present invention adopts, this method comprises: upload defeated main optical business signal main with optical transmission line; Divide wave optical signal or dedicated optical signal on standby optical transmission line, to transmit the light signal that is used to monitor with part; Monitor the state and the availability of primary and backup two route optical transmission lines respectively; Analyze the line conditions of primary and backup two route optical transmission lines; Standby optical transmission line just often sends on two optical transmission nodes and receives to protect and switch control information when judging the master to use the light transmission line failure; Jointly the master is being switched with the transmission signals protection on optical transmission line and the standby optical transmission line on transmitting terminal optical transmission nodes and the receiving end optical transmission nodes and recovering with 2 * 2 photoswitches.
Adopt four-fiber bidirectional optical amplifying section protective device of the present invention to have following advantage: the first, the transmission bandwidth in the key light channel can all be used for the transport service light signal, its service transmission bandwidth broad, utilization factor height; The second, protection is switched only relevant with adjacent node, not limited by the network topology of total system; The 3rd, protection is switched and limited by the attenuation of optical fiber transmission line, and irrelevant with other technical parameter, does not promptly limit optical regenerator section length and optical amplifying section span; The 4th, optical transmission chain that need not be other in the system and image intensifer configuration, system cost is cheap, safeguards simple; The 5th, only add two photoswitches in the key light path, little so it is little to have an Insertion Loss to the influence of system, be convenient to the upgrading of old equipment.
Description of drawings
Fig. 1 first kind of four-fiber bidirectional optical amplification section protective device of the present invention is at two end node structural drawing;
Fig. 2 second kind of four-fiber bidirectional optical amplification section protective device of the present invention is at two end node structural drawing;
Fig. 3 the third four-fiber bidirectional optical amplification section protective device of the present invention is at two end point structure figure;
Fig. 4 the third four-fiber bidirectional optical amplification section protective device of the present invention is used the application state of optical transmission line and standby optical transmission line to the master under the normal transmission situation;
Fig. 5 the third four-fiber bidirectional optical amplification section protective device of the present invention is switched under the situation main application state with optical transmission line and standby optical transmission line in protection;
Fig. 6 first kind of four-fiber bidirectional optical amplification section protective device of the present invention is at the structural drawing of an intermediate light transmission node.
Embodiment
Figure 1 shows that first kind of four-fiber bidirectional optical amplification section protective device of the present invention is used to the structural drawing of two light transmission end nodes.Among Fig. 1, end node 1 with between another end node 3, be connected by two-way four optical fiber 8,9,10,11, wherein optical fiber 8 is used as from main the use optical transmission line of end node 1 to end node 3 transmitting optical signals, optical fiber 9 is used as from the standby optical transmission line of end node 1 to end node 3 transmitting optical signals, optical fiber 10 is used as from end node 3 uses optical transmission line, optical fiber 11 to be used as from the standby optical transmission line of end node 3 to end node 1 transmitting optical signal to the main of end node 1 transmitting optical signal.Usually select the less main optical transmission line of using of conduct of optical attenuation in equidirectional two optical transmission lines.The protective device structure of two end nodes is equity fully.Two be used to regulate main adjustable optical attenuator 23,22 and be installed in two masters respectively and switch photoswitch 13,14 with the protection of optical transmission line 8,10 light signal receiving ends with optical transmission line 8,10 light signal strengths before; above-mentioned optical attenuator can also can be installed in the transmitting terminal of light signal according to the light signal receiving end that is installed in shown in Figure 1.Respectively comprise two 2 * 2 photoswitches 12,14 and 13,15 of switching photoswitch as protection in the protective device of two end nodes.Respectively comprise a luminous- power distributor 24 and 25 that is used to isolate the auxiliary channel signal in two end nodes, also respectively comprise a monitoring and controlling channels optical multiplexer 26,27 that is used to mix monitoring and controlling channels light signal and main optical path signal, this wave multiplexer can use special wave multiplexer, also can use the wave multiplexer in the image intensifer.Two end nodes respectively comprise a monitoring and controlling channels optical branching filter that is used for monitoring of separation channel optical signal and main optical path signal, and this channel-splitting filter can use special channel-splitting filter, also can use the channel-splitting filter in the image intensifer.Two end nodes comprise that respectively is used to monitor the auxiliary channel input optical signal monitoring device 30,31 that the auxiliary channel input optical signal is lost and recover.Two end nodes comprise that respectively one is used to receive and dispatch and handle Optical Supervisory Channel information and can monitors the Optical Supervisory Channel dropout that received and the light monitor message processor 18 of recovery; 19; two end nodes comprise respectively that also is used to carry out the APS processing controller 20 that APS is handled; 21; this controller is responsible for receiving the dropout that light monitor message processor and auxiliary channel input optical signal monitoring device send and the variation of recovery; the coding of establishment APS agreement; exchange the APS protocol signal with the monitor message processor; send protection and switch alarm, and the protection of control photoswitch is switched and recovered.
As shown in Figure 1, the main optical path signal 4 of end node 1 is switched photoswitch 12 through send into protection after the part monitoring and controlling channels light signal process monitoring and controlling channels optical multiplexer of telling from the monitoring and controlling channels optical signals luminous-power distributor 24 of light monitor message processor 18 outputs 26 closes ripple.Under the normal transmission situation, close light signal behind the ripple and be fed to mainly with optical transmission line 8, switch in protection that situation is next to be switched into standby optical transmission line 9.Another part monitoring and controlling channels light signal of telling from luminous-power distributor 24 is under normal circumstances imported to standby optical transmission line 9 by photoswitch 12 then as the auxiliary channel light signal, is switched to become owner of with optical transmission line 8 under situation is switched in protection.Two ways of optical signals arrives end node 3 through primary and backup two optical transmission lines transmission back.In end node 3 main lead light decay consumption equilibrium with the optical signals adjustable optical attenuator 23 of optical transmission line 8 with transmission ray road 8 after, all be input to protect with the light signal of standby optical transmission line 9 and switch photoswitch 13.Protect in the switching state that photoswitch 13 is switched in protection and the other side's end node that to switch 12 the switching state of opening the light corresponding; promptly under the normal transmission situation; protection is switched photoswitch 13 and independently is transferred to monitoring and controlling channels optical branching filter 29 with the wave optical signal that closes of optical transmission line 8 process adjustable optical attenuators 23 in the future, gives auxiliary channel input optical signal monitoring device 31 and provide for oneself in the future with the monitoring and controlling channels optical signal transmission of optical transmission line 9.The main optical signal that closes behind the ripple is isolated the monitoring and controlling channels light signal by monitoring and controlling channels optical branching filter 29, sends light monitor message processor 19 to; Under situation is switched in protection; from standby optical transmission line 9 close ripple after the protected photoswitch 13 of switching of main optical signal switch to monitoring and controlling channels optical branching filter 29; and after independently using monitoring and controlling channels light signal process adjustable optical attenuator 23 equilibriums of light transmission line 8; the protected photoswitch 13 of switching switches to auxiliary channel input optical signal monitoring device 31, and subsequent process is consistent with normal condition.Auxiliary channel input optical signal monitoring device 31 carries out the auxiliary channel light signal to be lost and the monitoring that recovers, and monitoring result sends APS processing controller 21 to.Then send into light monitor message processor 19 fully by closing behind the ripple in the light signal isolated monitoring and controlling channels light signal; the losing and return to form of input monitoring channel optical signal of main optical path situation represented in the monitoring of this processor; and the APS request signal sent here of the APS processing controller 21 that receives monitoring and controlling channels information that each node and webmaster send here and this node, send to each node again.This processor 19 is also given APS processing controller 21 with losing of the monitoring and controlling channels light signal of the APS request signal of other node and the input that monitors with restoring signal simultaneously and is carried out analyzing and processing.21 of APS processing controllers receive the input optical signal that all directions of this node send here and lose and restoring signal, for example the auxiliary channel input optical signal sent here of auxiliary channel input optical signal monitoring device 31 lose the representative sent here with restoring signal and light monitor message processor 19 the monitoring and controlling channels light signal of main optical path situation lose and restoring signal.Whether APS processing controller 21 is analyzed to judge according to these signals and is sent the protection switching request or switch alarm to webmaster transmission protection to other node by light monitor message processor 19.Simultaneously, APS processing controller 21 also receives the protection switching request of other node that light monitor message processor 19 sends here, and the protection of controlling this node is switched the protection that photoswitch 13,15 carries out corresponding the other side's node switching state and switched.Above-mentioned text description utilize protective device of the present invention from the process of end node 1 to end node 3 transmitting optical signals.Similar to above-mentioned situation from end node 3 to end node 1 reciprocal optical signal transmission, no longer be repeated in this description here.
Fig. 2 is the structural drawing that second kind of four-fiber bidirectional optical amplification section protective device of the present invention is used to two light amplification end nodes.The difference of Fig. 2 and Fig. 1 is: first kind of protective device of Fig. 1 distributes part monitoring and controlling channels light signal in end node 1 employing by luminous-power distributor and is transported to standby optical transmission line 9 as the auxiliary channel light signal, and main optical path signal and monitoring and controlling channels light signal are transferred to the main optical transmission line 8 of using after closing ripple; Second kind of protective device of Fig. 2 is then after end node 1 adopts main optical path signal 4 and monitoring and controlling channels optical signals monitoring and controlling channels optical multiplexer from light monitor message processor 18 to close ripple; distribute part by luminous-power distributor again and close the ripple signal light power and give standby optical transmission line 9 as the auxiliary channel optical signal transmission, another part optical signal transmission is given main with optical transmission line 8.Subsequently, handle at end node 3 light signals that receive identical with technical scheme shown in Figure 1, all by monitoring and controlling channels optical branching filter 29 with monitoring and controlling channels light signal and main optical path Signal Separation, be transported to light monitor message processor then.From end node 3 to the opposite direction optical signal transmission process of end node 1 and above-mentioned from end node 1 to end node 3 process equity fully, no longer be repeated in this description.
When adopting shown in Figure 2 second kind of protective device of the present invention; also can carry out accommodation to this scheme uses; promptly earlier the main optical path Signal Separation is become two-way by luminous-power distributor; wherein one the tunnel switch photoswitch 12 as the auxiliary channel light signal through overprotection and be transferred to standby optical transmission line, another road and monitoring and controlling channels optical signals monitoring and controlling channels optical multiplexer from light monitor message processor close ripple and send into protection again and switch photoswitch and transmit with optical transmission line through main.
In first and second kinds of protective devices of the present invention shown in Fig. 1,2, described luminous-power distributor can adopt the luminous-power distributor with dynamic luminous power distribution function, also can adopt the luminous-power distributor of fixed mixing ratio.
In first and second kinds of protective devices of the present invention shown in Fig. 1,2; the scheme that the signal that can also adopt special light source to send transmits through standby optical transmission line as the auxiliary channel light signal; this scheme does not need to use luminous-power distributor, only needs the monitoring and controlling channels optical signals monitoring and controlling channels optical multiplexer 26 from light monitor message processor 18 closed behind the ripple to transmit with optical transmission line through main.
In first and second kinds of protective devices of the present invention shown in Fig. 1,2, can also adopt the light detection device on dedicated optical amplifier, optical add/drop multiplexer, the optical branching filter to use as auxiliary channel input optical signal monitoring device 30,31.
In first and second kinds of protective devices of the present invention shown in Fig. 1,2, can also adopt special-purpose optical monitoring signal device on end node, to monitor losing of received main optical path signal and judge whether optical transmission line is normal with recovery.
Fig. 3 is used to the structural drawing of two light transmission end nodes for the third four-fiber bidirectional optical amplification section protective device of the present invention.The difference of Fig. 3 technical scheme and Fig. 1, Fig. 2 technical scheme is: Fig. 3 technical scheme is switched photoswitch 12 and standby optical transmission line 9 transmission as the auxiliary channel signal through overprotection at the monitoring and controlling channels light signal that end node 1 directly utilizes light monitor message processor 18 to produce, and directly is transferred to light monitor message processor 19 and switch photoswitch 13 at end node 3 these monitoring and controlling channels light signals of take over party through overprotection; Main optical path signal 4 is directly switched photoswitch 12 by protection and is transmitted with optical transmission line 8 through main; adopt main optical path input optical signal monitoring devices 16 monitoring light signals to lose or recover at take over party's end node 3; and monitoring result is transferred to APS processing controller 21; like this, in technical scheme shown in Figure 3, no longer need auxiliary channel input optical signal monitoring device 30,31 and luminous- power distributor 24,25 and monitoring and controlling channels light signal wave multiplexer 26,27 and monitoring and controlling channels optical branching filter 28,29 in Fig. 1,2 technical schemes.
In the third protective device technical scheme shown in Figure 3, the main optical path signal 4 of end node 1 is switched photoswitch 12 by protection and be transported to the main transmission ray road 8 of using under the normal transmission situation, switches the next standby transmission ray road 9 that is transported to of situation in protection.Arrive through circuit transmission back in the two ways of optical signals of end node 3 by main light signal with the optical transmission line transmission and at first be adjusted to light signal attenuation equilibrium with standby transmission ray road 9 through adjustable optical attenuator 23; two ways of optical signals is admitted to protection and switches photoswitch 13 then; this switch 13 is given the main optical path optical signal transmission in the main optical path input optical signal monitoring device 16 and is carried out light detection, and then sends main optical path light signal 5.Protection is simultaneously switched photoswitch 13 and also will be imported to light monitor message processor 19 through the monitoring and controlling channels light signal that circuit transmission is sent here and import the monitoring of light pilot signal, and does the processing of light monitor message.The APS request signal that light monitor message that light monitor message processor 19 each node of reception and webmaster are sent here and the APS processing controller 21 of this node are sent here sends to each node again.Light monitor message processor 19 is also given APS processing controller 21 with the APS request signal of other node and is carried out analyzing and processing.21 of APS processing controllers receive the input optical signal that all directions of this node send here and lose and restoring signal, and the Optical Supervisory Channel input signal light that main optical path input optical signal lossing signal of sending here as main optical path input optical signal monitoring device 16 and light monitor message processor 19 are sent here is lost and restoring signal.Whether APS processing controller 21 is analyzed to judge according to these signals and is sent the protection switching request or switch alarm to webmaster transmission protection to other node by light monitor message processor 19.Simultaneously APS processing controller 21 also receives the protection switching request of other node that light monitor message processor 19 sends here, and the protection of control end node 3 is switched photoswitch 13,15 and carried out state and switch.In the technical scheme shown in Figure 3, similar to above-mentioned situation from end node 3 to the opposite direction optical signal transmission of end node 1, no longer be repeated in this description here.
In the technical scheme, each transmission in the optical transmission nodes and reception protection are switched photoswitch 12,13,14,15 and are 2 * 2 photoswitches shown in Fig. 1 to 3.
Shown in Fig. 1 to 3 in the technical scheme, a main optical transmission line road and a standby optical transmission line are respectively arranged on two optical transmission direction between two light transmission end nodes, these two end nodes can be the light amplification nodes, also can be wavelength-division terminal node or Optical Add Drop Multiplexer node, can also be optical switch node.
Fig. 4, Fig. 5 are illustrated respectively in Fig. 1 technical scheme and are switching the state that uses main usefulness optical transmission line and standby optical transmission line under the situation under the normal transmission situation, in protection between two nodes.As shown in Figure 4; under the normal transmission situation; the transmission protection is switched photoswitch 12 and main optical path signal 4 is transferred to main with in the optical transmission line 8; and the main signal that will comprise the monitoring and controlling channels light signal that light monitor message processor sends imports to transmission in the standby optical transmission line 9 as the auxiliary channel light signal; at Return-ing direction, main optical path signal 6 transmits with optical transmission line 10 by main accordingly.So just can be at two optical transmission nodes by the auxiliary channel light signal being monitored the availability of standby optical transmission line 9,11.If auxiliary channel input optical signal monitoring device 30,31 detects input optical signal and loses and illustrate that then standby Transmission Fibers 9,11 is unavailable; 20,21 of APS processing controllers send alarm signal, and do not go to handle the protection switching request of this protection section.If the auxiliary channel input optical signal is normal; then the representative sent here of APS processing controller monitoring light monitor message processor the main light pilot signal input lossing signal that whether ruptures with Transmission Fibers, receive the protection switching request signal that light monitor message processor is sent here simultaneously.As shown in Figure 5; if find to have occurred main fibercuts with optical transmission line 8; then the APS processing controller 21 in this optical transmission line receive direction optical transmission nodes sends to optical transmission line sending direction optical transmission nodes in the mode of protection switching request by light monitor message processor 19 and light pilot signal transmission channel; APS processing controller 20 in two optical transmission nodes; 21 control the transmission on the node separately and receive protection and switch photoswitch 12; 13; 14; 15 protect and switch, and the main optical path signal is switched to optical fiber 9; 11 transmission.APS processing controller in each optical transmission nodes receives protection switching request signal from other node by light monitor message processor, and whether analyze oneself be exactly the destination node of this request, if not, then ignore.If then analyzing is the protection switching request which adjacent node is sent, control then the related side to protection switch photoswitch and also carry out the duty upset and switch, and send protection and switch alarm.The main optical path signal is just switched photoswitch and has been imported in the standby Transmission Fibers and transmit via sending protection like this, switches photoswitch and leads and get back in the main optical path via receiving protection again at receiving terminal node; The auxiliary channel flashlight is then switched photoswitch by the transmission protection and has been imported to main with transmitting in the optical channel; switching photoswitch via the reception of receiving end protection again leads and gets back to auxiliary channel input optical signal monitoring device; this moment, the overall optical span line was in the protection switch status, as shown in Figure 5.
Because the master is ruptured with Transmission Fibers; the auxiliary channel input optical signal monitoring device of receiving end will send input optical signal to the APS processing controller and lose alarm this moment; illustrate that the master does not recover with Transmission Fibers, optical amplifying section remains on the protection switch status and moves down.If the input optical signal that auxiliary channel input optical signal monitoring device sends is lost alarm and is disappeared; then the main connection with Transmission Fibers of explanation recovers; the APS processing controller is judged according to the order of network management configuration and is continued to remain on the transmission of carrying out light signal under the protection switch status; still after auxiliary channel input optical signal monitoring device can stably receive the light signal of a period of time, again the protection photoswitch unification of interdependent node is returned to normal transmission state, promptly return to normal transmission state shown in Figure 4.Those skilled in the art should be noted that owing to active and standbyly have reciprocity with Transmission Fibers, the present invention be not precluded within system works just often the auxiliary channel light signal transmit and the situation that the main optical path signal transmits in Transmission Fibers in standby Transmission Fibers main.
Fig. 4,5 has explained the course of work of first kind of protective device of the present invention shown in Figure 1 under normal condition and protection switch status; principle of work and Fig. 1 protective device of two kinds of protective devices in addition of the present invention are similar shown in Fig. 2,3; with reference to Fig. 2,3; under normal condition; two protective devices transmit the main optical path signals by main with optical transmission line 8,10; under the protection switch status, by standby optical transmission line 9,11 transmission main optical path signals.
Utilize above-mentioned Fig. 1 to 3 to explain that the protection of the optical amplifying section of three kinds of protective devices of the present invention between two end nodes switches principle; Fig. 1 to 3 is depicted as the monolateral equipment on transmission ray road; the protective device structure of in other words conj.or perhaps holding the site type node, promptly Fig. 1,2,3 is depicted as protective device structure on the end node at transmission line two ends.For the light amplification node on the optical transmission line centre position, Optical Add Drop Multiplexer node and optical switch node is two-way or multidirectional middle site type node.For example, adopting first kind of protective device shown in Figure 1 as middle site type node, then this through-station structure as shown in Figure 6, from Fig. 6 and Fig. 1 relatively more visible both distinguish.Except the shared light monitor message processor 33 of two transmission direction protective devices of intermediate node and APS processing controller 32, other structures of middle protective device are equal to two back-to-back protective devices shown in Figure 1 among Fig. 6.Fig. 6 is easy, the fiber section of not shown optical transmission line.Owing to Figure 6 shows that intermediate light transmission node protective device; this intermediate node is crossed on two optical transmission line protection sections; Reference numeral 34,36 and 35,37 among Fig. 6 represents respectively for this intermediate node master in the protection section with, standby optical transmission line, represents main with, standby optical transmission line for this intermediate node in another protection section respectively with Reference numeral 38,40 and 39,41.
Utilize the constituted mode of through-station shown in Figure 6, the optical transmission nodes of site type in the middle of also can constituting with protective device shown in Fig. 2,3, wherein a shared light monitor message processor and an APS processing controller in an intermediate node too.
Claims (6)
1. one kind is used for optical transmission nodes four-fiber bidirectional optical amplifying section protective device, comprises on side's optical transmission nodes:
The monitoring and controlling channels optical multiplexer is used for sending protection and switching input end of photoswitch closing ripple from the monitoring and controlling channels light signal of luminous-power distributor and main optical path light signal from other equipment of this node, outputing to then;
Luminous-power distributor is used for the monitoring and controlling channels light signal from light monitor message processor is assigned as two-way, and one the tunnel is transferred to the monitoring and controlling channels optical multiplexer, and another road is transferred to send to protect switches another input end of photoswitch;
Send protection and switch photoswitch, be used for to switch to one of sending direction main optical transmission line road and the standby optical transmission line of sending direction road from the light signal of monitoring and controlling channels optical multiplexer, will switch to another road of sending direction main optical transmission line road and the standby optical transmission line of sending direction from the monitoring and controlling channels light signal of luminous-power distributor simultaneously;
Adjustable optical attenuator, be used for from the attenuated optical signal on receive direction main optical transmission line road to consistent with the standby optical transmission line receiving optical signals of receive direction power, the back optical signal transmission that will decay is then given to receive to protect and is switched photoswitch;
Receive protection and switch photoswitch, be used for to switch to from the light signal on one of adjustable optical attenuator and the standby optical transmission line of receive direction road one of monitoring and controlling channels optical branching filter and auxiliary channel input optical signal monitoring device, will switch to another of monitoring and controlling channels optical branching filter and auxiliary channel input optical signal monitoring device simultaneously from the light signal on another road of adjustable optical attenuator and the standby optical transmission line of receive direction;
The monitoring and controlling channels optical branching filter is used for monitoring and controlling channels light signal and main optical path light signal partial wave, and the monitoring and controlling channels light signal that then partial wave is gone out outputs to light monitor message processor and the main optical path light signal that partial wave goes out outputed to other equipment of this node;
Auxiliary channel input optical signal monitoring device is used to monitor from receiving protection and switches the monitoring and controlling channels light signal of photoswitch and lose or recover, and monitoring is transferred to the APS processing controller;
Light monitor message processor, be used to monitor from receiving protection and switch another road light signal of photoswitch and lose or recover, and handle from the information of monitoring and controlling channels light signal and be transferred to the APS processing controller and be used for protection switch messages and light monitor message from the APS processing controller are transferred to luminous-power distributor with monitoring and controlling channels light signal form;
The APS processing controller; be used to receive from the information of auxiliary channel input optical signal monitoring device with from the information of light monitor message processor; to analyze and the control transmission; the reception protection is switched the photoswitch execute protection and is switched; and will send; receive and protect the status information transmission of switching photoswitch also further to be transferred to the other side's node for light monitor message processor, the other side's optical transmission nodes that the APS processing controller sends in receiving from the other side's optical transmission nodes sends; receiving protection switches after the status information of photoswitch and sends in also corresponding this optical transmission nodes of adjustment; receive protection and switch the state of photoswitch.
2. one kind is used for optical transmission nodes four-fiber bidirectional optical amplifying section protective device, comprises on side's optical transmission nodes:
The monitoring and controlling channels optical multiplexer is used for outputing to luminous-power distributor then with closing ripple from the monitoring and controlling channels light signal of light monitor message processor and main optical path light signal from other equipment of this node;
Luminous-power distributor is used for the light signal from the monitoring and controlling channels optical multiplexer is assigned as two-way, is transferred to respectively to send two input ends that photoswitch is switched in protection;
Send protection and switch photoswitch, be used for and switch to one of sending direction main optical transmission line road and the standby optical transmission line of sending direction road from one of two ways of optical signals of luminous-power distributor, will switch to another road of sending direction main optical transmission line road and the standby optical transmission line of sending direction from another of the two ways of optical signals of luminous-power distributor;
Adjustable optical attenuator, be used for from one road attenuated optical signal on receive direction main optical transmission line road to receive another road optical signal power consistent with the standby optical transmission line of receive direction, the back optical signal transmission that will decay is then given and is received protection and switch photoswitch;
Receive protection and switch photoswitch, be used for to switch to from the light signal on one of adjustable optical attenuator and the standby optical transmission line of receive direction road one of monitoring and controlling channels optical branching filter and auxiliary channel input optical signal monitoring device, will switch to another of monitoring and controlling channels optical branching filter and auxiliary channel input optical signal monitoring device from the light signal on another road of adjustable optical attenuator and the standby optical transmission line of receive direction;
The monitoring and controlling channels optical branching filter is used for monitoring and controlling channels light signal and main optical path light signal partial wave, and the monitoring and controlling channels light signal that then partial wave is gone out outputs to light monitor message processor and the main optical path light signal that partial wave goes out outputed to other equipment of this node;
Auxiliary channel input optical signal monitoring device is used to monitor from receiving protection and switches the light signal of photoswitch and lose or recover, and monitoring is transferred to the APS processing controller;
Light monitor message processor, be used to monitor from receiving protection and switch another road light signal of photoswitch and lose or recover, and handle from the information of monitoring and controlling channels light signal and be transferred to the APS processing controller and be used for the protection switch messages from the APS processing controller is transferred to the monitoring and controlling channels optical multiplexer with monitoring and controlling channels light signal form;
The APS processing controller; be used to receive from the information of auxiliary channel input optical signal monitoring device with from the information of light monitor message processor; to analyze and the control transmission; the reception protection is switched the photoswitch execute protection and is switched; and will send; receive and protect the status information transmission of switching photoswitch also further to be transferred to the other side's node for light monitor message processor, the other side's optical transmission nodes that the APS processing controller sends in receiving from the other side's optical transmission nodes sends; receiving protection switches after the status information of photoswitch and sends in also corresponding this optical transmission nodes of adjustment; receive protection and switch the state of photoswitch.
3. one kind is used for optical transmission nodes four-fiber bidirectional optical amplifying section protective device, comprises on side's optical transmission nodes:
Send protection and switch photoswitch, be used for to switch to one of sending direction main optical transmission line road and the standby optical transmission line of sending direction road from the monitoring and controlling channels light signal of light monitor message processor, will switch to another road of sending direction main optical transmission line road and the standby optical transmission line of sending direction from the main optical path light signal that this section is put other equipment simultaneously;
Adjustable optical attenuator, be used for from the attenuated optical signal on receive direction main optical transmission line road to consistent with the standby optical transmission line receiving optical signals of receive direction power, the back optical signal transmission that will decay is then given to receive to protect and is switched photoswitch;
Receive protection and switch photoswitch, be used for and switch to main optical path input optical signal monitoring device from adjustable optical attenuator with from the main optical path light signal on one of the standby optical transmission line of receive direction road, will switch to light monitor message processor from the monitoring and controlling channels light signal on another road of adjustable optical attenuator and the standby optical transmission line of receive direction simultaneously;
Main optical path input optical signal monitoring device is used to monitor losing or recovering of main optical path light signal, and monitoring result is transferred to the APS processing controller, and the main optical path light signal outputed to other equipment of this node;
Light monitor message processor, be used to monitor from receiving protection and switch the light signal of photoswitch and lose or recover, and handle from the information of monitoring and controlling channels light signal and be transferred to the APS processing controller and be used for sending protection and switching photoswitch being transferred to monitoring and controlling channels light signal form from the protection switch messages of APS processing controller;
The APS processing controller; be used to receive from the information of main optical path input optical signal monitoring device with from the information of light monitor message processor; analyze and the control transmission; the reception protection is switched the photoswitch execute protection and is switched; and will send; receive and protect the status information transmission of switching photoswitch also further to be transferred to the other side's node for light monitor message processor, the other side's optical transmission nodes that the APS processing controller sends in receiving from the other side's optical transmission nodes sends; receiving protection switches after the status information of photoswitch and sends in also corresponding this optical transmission nodes of adjustment; receive protection and switch the state of photoswitch.
4. according to the described four-fiber bidirectional optical amplifying section protective device of claim 1 or 2 or 3, it is characterized in that: on the optical transmission nodes at four-fiber bidirectional optical amplifying section two ends, have identical protective device.
5. according to the described four-fiber bidirectional optical amplifying section protective device of claim 1 or 2 or 3, it is characterized in that: transmission in optical transmission nodes protection is switched photoswitch and is received protection and switches photoswitch and be 2 * 2 photoswitches.
6. according to the described four-fiber bidirectional optical amplifying section protective device of claim 1 or 2 or 3; it is characterized in that: it is light amplification node or wavelength-division terminal node or Optical Add Drop Multiplexer node or optical switch node that a main optical transmission line road and a standby optical transmission line, these two optical transmission nodes are respectively arranged on two optical transmission direction between two optical transmission nodes.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2005100749355A CN100335923C (en) | 2005-06-07 | 2005-06-07 | Line protector for four-fiber bidirectional optical amplification section of WDM optical transmission system |
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| CNB2005100749355A CN100335923C (en) | 2005-06-07 | 2005-06-07 | Line protector for four-fiber bidirectional optical amplification section of WDM optical transmission system |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101141218B (en) * | 2007-04-18 | 2013-01-16 | 中兴通讯股份有限公司 | Protection switching system and method for wavelength division multiplexing load client network |
| CN101369849B (en) * | 2008-10-17 | 2011-02-16 | 北京北方烽火科技有限公司 | Method for switching optical fibre remote radio module cascade nodes |
| CN101882958B (en) * | 2010-05-12 | 2014-12-10 | 中兴通讯股份有限公司 | APR (Automatic Power Reduction) protection method and device |
| CN102265640B (en) * | 2011-06-21 | 2014-04-16 | 华为技术有限公司 | Optical line transmission protection system and method |
| CN104410444B (en) * | 2014-12-25 | 2018-03-02 | 武汉光迅科技股份有限公司 | A kind of not damaged synchronous handover protector for dynamic optical line |
| CN107846247B (en) * | 2017-11-14 | 2019-08-06 | 烽火通信科技股份有限公司 | A kind of pretection switch system and method |
| CN109613656B (en) * | 2018-12-20 | 2020-10-27 | 博创科技股份有限公司 | Adjustable optical power wavelength division multiplexer and preparation method thereof |
| CN114488398A (en) * | 2022-01-27 | 2022-05-13 | Nano科技(北京)有限公司 | Redundant silicon-based photoelectric integrated chip |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020039348A1 (en) * | 2000-09-29 | 2002-04-04 | Takashi Honda | Method for controlling switching in bidirectional line-switched ring |
| CN1372398A (en) * | 2001-02-27 | 2002-10-02 | 北京邮电大学 | Node protector for changover ring of wave division multiplexing circuit |
| CN1538642A (en) * | 2003-04-15 | 2004-10-20 | 中兴通讯股份有限公司 | Device of full light network reusing segment shared protection |
| US20050025490A1 (en) * | 2003-07-28 | 2005-02-03 | Fujitsu Network Communications, Inc. | Optical network with sub-band rejection and bypass |
| CN1581733A (en) * | 2003-08-15 | 2005-02-16 | 华为技术有限公司 | Two-way circuit protective inverting method |
-
2005
- 2005-06-07 CN CNB2005100749355A patent/CN100335923C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020039348A1 (en) * | 2000-09-29 | 2002-04-04 | Takashi Honda | Method for controlling switching in bidirectional line-switched ring |
| CN1372398A (en) * | 2001-02-27 | 2002-10-02 | 北京邮电大学 | Node protector for changover ring of wave division multiplexing circuit |
| CN1538642A (en) * | 2003-04-15 | 2004-10-20 | 中兴通讯股份有限公司 | Device of full light network reusing segment shared protection |
| US20050025490A1 (en) * | 2003-07-28 | 2005-02-03 | Fujitsu Network Communications, Inc. | Optical network with sub-band rejection and bypass |
| CN1581733A (en) * | 2003-08-15 | 2005-02-16 | 华为技术有限公司 | Two-way circuit protective inverting method |
Non-Patent Citations (1)
| Title |
|---|
| 光通道路由保护技术在工程中的应用探讨 乔月强 等，邮电设计技术，第3期 2003 * |
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