CN1255965C - Optical brancking-complexing node device based on wavelength or waveband protection - Google Patents
Optical brancking-complexing node device based on wavelength or waveband protection Download PDFInfo
- Publication number
- CN1255965C CN1255965C CNB031347770A CN03134777A CN1255965C CN 1255965 C CN1255965 C CN 1255965C CN B031347770 A CNB031347770 A CN B031347770A CN 03134777 A CN03134777 A CN 03134777A CN 1255965 C CN1255965 C CN 1255965C
- Authority
- CN
- China
- Prior art keywords
- switch
- wavelength
- wavestrip
- output
- optical fiber
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Abstract
The present invention relates to an optical division insertion multiplexing node device based on wave length/wave band protection, which comprises two wave separators, two wave synthesizers and a line protection unit, wherein via two contained cascaded 2x2 optical switches, the line protection unit switches optical signals of single wave length/wave band. Thus, an operating wave length/wave band in a fault channel of an optical fiber loop can be switched to a preparative protection wave length/wave band of the other optical fiber loop in the opposite direction; simultaneously, another optical switch can be inserted between the two cascaded optical switches to realize flexible local upper and lower speech functions. The device can realize grain protection on the wave length/wave band for a two-fiber both-way line protection optical division insertion multiplexing system or a two-fiber one-way line protection optical division insertion multiplexing system.
Description
Technical field
The present invention relates to a kind of Optical Add Drop Multiplexer node apparatus, more particularly, the present invention relates to can be applicable to the node apparatus of or two fine unidirectional Optical Add Drop Multiplexer looped networks two-way based on two fibres of wavelength or wavestrip based on wavelength or wavestrip protection.
Background technology
The fast development of data services such as IP makes people more and more to the demand of bandwidth, and some emerging services that emerge in large numbers, as wavelength rent, the light virtual net, also need a large amount of bandwidth.Everything is promoting the trunk optical-fiber network and is developing to Tbit/s level, high performance direction.And in metropolitan area network, have frequent service dispatching.For scheduling bandwidth flexibly, alleviate the trunk communication network the node bottleneck, reduce the network operation expense, strengthen the robustness of photosphere network, Optical Add/Drop Multiplexer (OADM-OpticalAdd/Drop Multiplex) beginning obtains people's attention in optical-fiber network is used.
Dense wave division multipurpose (DWDM) optical transmission system has been realized the signal in transmission multichannel unlike signal source in an optical fiber, thereby makes that the optical transmission cost is reduced significantly.But traditional DWDM optical transmission is the point-to-point transmission, can only adopt the protected mode of point-to-point, at present a large amount of privacy protections that adopt the 1+1 mode in network application.The privacy protection of this 1+1 makes 50% bandwidth be in the state that does not make full use of always.
The same with the SDH transmission system, wavelength-division multiplex system also can make up looped network by technological innovation, the APS (APS) of employing and the similar looped network of SDH.Optical Add Drop Multiplexer (OADM) system is exactly the dwdm system that has possessed the group looped network and talked about function flexibly up and down, thereby makes that the networking capability of dwdm system and flexible dispatching ability are promoted greatly.
By hardware, software and system design, dwdm system can be upgraded to the OADM system, thereby possess the ring network ability and talk about function flexibly up and down.This is a development trend place of present optical transmission system.After dwdm system was upgraded to the OADM system, its looped network protection mode under the situation of annular networking had five kinds, was respectively two fine half-duplex channel protections, two fine duplex channel protections, two fine one-way line protections, two fine bidirectional line protection and SNCPs.Wherein in protection of two fine one-way lines and the two fine bidirectional line protected modes, equal protected mode that is based on multiplex section of employing at present.In case promptly the somewhere fault triggers the looped network protection switching criterion in the network, will switch by the business on the all-network of fault effects.For the OADM equipment based on the protection of multiplex section, at both sides, fault point light path loopback, all are advanced at loopback point/go out to protection with in the channel by the business of fault effects when breaking down, thereby reach the network service protection under the failure condition.Industry has had two fine bidirectional line protection OADM equipment based on multiplex section at present; this bi-directional light route protection belongs to shares the formula protection; under the idle situation of protection path, can transmit some low-grade business; be applicable to the uniform relatively situation of each node traffic flow on the looped network; the shortcoming of this protected mode is certain business when the network carrying; as the SDH business; itself possesses outstanding defencive function and when not needing the OADM looped network that defencive function is provided; can't accomplish it is not protected, thereby cause the unnecessary wasting of resources.Also there are not two fine two-way or one-way line protection OADM equipment at present based on wavelength and wavestrip; this two fine two-way or one-way line protection OADM equipment based on wavelength and wavestrip can be selected flexibly; that need protect makes it by the two fine two-way or one-way line protected locations based on wavelength or wavestrip among the present invention; and the wavelength that need not protect can adopt other mode; like this when breaking down in the circuit; just can all business all not switch, and just need switch just carry out professional switching.
Summary of the invention:
The object of the invention is to provide a kind of Optical Add Drop Multiplexer node apparatus based on wavelength or wavestrip protection; utilize this device can on wavelength or wavestrip granularity, realize two fine two-way or two fine one-way line defencive functions; and can realize support in wavelength or wavestrip to extra traffic in its protection; need like this on the business of Optical Add Drop Multiplexer protection to the wavelength of Optical Add Drop Multiplexer looped network protection; do not need the business of Optical Add Drop Multiplexer protection then to go up on the wavelength that the Optical Add Drop Multiplexer looped network do not protect, reach networking capability flexibly.
A kind of Optical Add Drop Multiplexer node apparatus of the present invention based on wavelength or wavestrip protection, comprise: two channel-splitting filters, to be decomposed into single wavelength of multichannel or the single wavestrip light signal of multichannel from the interior ring of rightabout transmitting optical signal, multi-wavelength in the every road of outer shroud two-way optical fiber or many wavestrips light signal, and single wavelength or single wavestrip signal after these are decomposed be transferred to the route protection unit, or skip the route protection unit and directly give wave multiplexer or direct words up and down; Two wave multiplexers, will be from the single wavelength of multichannel of route protection unit (or channel-splitting filter, local ticket unit up and down) or the single wavestrip signal of multichannel two direction transmitting optical signals according to the synthetic respectively multi-wavelength in the direction of propagation or many wavestrips, and with these two direction light signals after synthetic be sent to respectively two rightabout on the ring, outer shroud two-way optical fiber; Optical Add Drop Multiplexer operation wavelength of transmitting in inner and outer rings optical fiber that needs protection or wavestrip all have correspondence protection wavelength or the wavestrip of reserving in opposite Fiber In The Loop FITE; It is characterized in that this device has the route protection unit, this route protection unit is by the first order, the second level two 2X2 optical switches cascade is formed, every grade of switch all has two inputs and two outputs, an input of the first order is connected respectively from interior with an output, each one tunnel single wavelength or single wavestrip light signal of a channel-splitting filter of outer shroud rightabout two-way optical fiber and a wave multiplexer, a partial output is with in an output is connected respectively, each one tunnel single wavelength or single wavestrip light signal of a channel-splitting filter of outer shroud rightabout two-way optical fiber and a wave multiplexer; In normal operating conditions, first, second grade switch is pass-through state, the first input end, first output that are the straight-through second level of first input end, first output switch of first order switch are to form passage one, service aisle as an operation wavelength or wavestrip, second input of second input of first order switch, the straight-through second level of second output switch, second output are to form passage two, as the reservation protection wavelength of this operation wavelength or wavestrip correspondence or the passage of wavestrip; In guard mode, in the node apparatus of both sides, fault point, be in switch status near the switch of fault point in the first order and the second level switch, be pass-through state away from the switch of fault point; Under pass-through state, the first input end of this switch links to each other with first output, and second input links to each other with second output; The first input end of this switch links to each other with second output under switch status, second input links to each other with first output, thereby the light signal of operation wavelength of normal propagation in the optical fiber or wavestrip is switched in protection wavelength corresponding in another road rightabout optical fiber or the wavestrip propagates, or will be switched in operation wavelength that optical fiber Central Plains, former road direction propagates or the wavestrip at protection wavelength or wavestrip light signal and continue to propagate; The first order at the circuit protected location; between the switch of the second level; can insert two other 2X2 optical switch; be used for the flexible of passage one and passage two; under talk about port; wherein insert the first input end of a switch and first output that first output is connected respectively to first order switch and the first input end of second level switch; second input of this switch and second output respectively as passage one flexibly on; under talk about port; the first input end of another switch that inserts and first output are connected respectively to second output of first order switch and second input of second level switch, second input of this switch and second output respectively also as passage two flexibly on; under talk about port.
Optical Add Drop Multiplexer node apparatus of the present invention, its route protection unit further comprise many group cascaded switchs, and singly the group cascaded switch is identical in the cascade system of first order switch and second level switch and operating state, guard mode and the aforementioned techniques scheme in every group.
Optical Add Drop Multiplexer node apparatus of the present invention; when being used for the one-way line protection; between the first order of circuit protected location, second level switch; only can also insert the upper and lower words port that a 2X2 optical switch is used for passage one; wherein the first input end of institute's insertion switch and first output are connected respectively to first output of first order switch and the first input end of second level switch, and second input of this switch and second output are respectively as upper and lower words port.
Optical Add Drop Multiplexer node apparatus of the present invention; when the route protection unit is used for fixing when talking about node apparatus up and down; do not insert between the first order, second level switch and be used for flexibly the 2X2 optical switch of words up and down, the output of first order switch is directly connected to the corresponding input of second level switch.
Optical Add Drop Multiplexer node apparatus of the present invention, it in the opposite direction all propagates the Optical Add Drop Multiplexer light signal of operation wavelength or wavestrip in the inner and outer rings two-way optical fiber of propagating optical signal, also all reserves corresponding protection wavelength or wavestrip in the two-way optical fiber.
Optical Add Drop Multiplexer node apparatus of the present invention, it in the opposite direction propagates the Optical Add Drop Multiplexer light signal of operation wavelength or wavestrip in one of the inner and outer rings two-way optical fiber of propagating optical signal, reserves corresponding protection wavelength or wavestrip in another road rightabout optical fiber.
Explain the basic functional principle of technical solution of the present invention in detail below in conjunction with Fig. 1 and Fig. 2.
As shown in Figure 1, two fine unidirectional and two fine bi-directional light add drop multiplex nodes 100 realizations based on wavelength or wavestrip comprise following basic unit:
Channel-splitting filter 10 (based on wavelength or based on wavestrip): the partial wave of realizing a plurality of wavelength or wavestrip;
Wave multiplexer 20 (based on wavelength or based on wavestrip): the ripple that closes of realizing a plurality of wavelength or wavestrip;
Based on two fine two-way or one-way line protected locations 30 wavelength or wavestrip.
A, B, C and D are four (two pairs) optical fiber of turnover Optical Add Drop Multiplexer node among Fig. 1.In fact this system and device can also comprise Optical Amplifier Unit, and as putting unit (OPA) and luminous power amplifying unit (OBA) before the light, OPA is before partial wave, and OBA is after deciliter ripple.But Optical Amplifier Unit can be optional according to the circuit situation of reality.As for the unit such as Optical Supervisory Channel of 1510nm, still as the configuration in the wavelength-division system (WDM), relate to the partial wave of Optical Supervisory Channel and key light channel and close ripple etc., do not illustrate in the drawings.
For two fine two-way OADM nodes, all carry operation wavelength and protection wavelength in these two pairs of optical fiber simultaneously.Can half wavelength be operation wavelength promptly, a half-wavelength be the protection wavelength, and this is the mode of typical two fine bidirectional line protections.Can be that base unit is divided arbitrarily also with wavelength and wavestrip.Among Fig. 1 among optical fiber A and the B certain or some wavelength be the work wavelength, and identical certain or some wavelength are necessary for the protection wavelength among C and the D, and other certain or some wavelength or wavestrip can adopt other protected modes such as unprotect mode or 1+1.The protection wavelength can transmit some low-grade extra traffics under idle situation.In Here it is this patent based on two fine bidirectional line protected modes of wavelength or wavestrip.
For two fine unidirectional OADM nodes, if in two pairs of optical fiber a pair of working optical fibre that is is arranged, a pair of protection optical fiber that is is arranged, this is the situation of the OADM of typical two fine one-way line protections.Can be that base unit is divided arbitrarily also with wavelength and wavestrip; some wavelength or wavestrip are gone protection in the mode of two fine unidirectional OADM looped networks; some wavelength or wavestrip are protected with protected modes such as 1+1; and some wavelength or wavestrip can adopt the mode of not protecting, in Here it is this patent based on two fine one-way line protected modes of wavelength or wavestrip.
Optical fiber between each unit connects shown in the solid line among Fig. 1.Wavelength behind the partial wave or wavestrip (as A1, A2, C1, C2 etc.) can be connected to two fine two-way/unidirectional protection unit based on wavelength or wavestrip with specific rule; also can directly lead directly to and (can lead directly to as A2 and be connected to B2 at intranodal; C4 can lead directly to and be connected to D4 etc.), can also be directly in the fixing words down of intranodal.
Channel-splitting filter 10 among Fig. 1 and wave multiplexer 20 can have multiple compound mode as required in different ways, are summarized as follows:
1) be single wavelength with the wavelength multiplexing/demultiplexing in the optical fiber;
2) be wavestrip with the wavelength multiplexing/demultiplexing in the optical fiber;
3) be wavelength+wavestrip with the wavelength multiplexing/demultiplexing in the optical fiber.
Among Fig. 1 just example wherein a road two fine two-way/one-way line defencive functions that carry out the looped network of wavelength/wavestrip level after wavelength/wavestrip multiplex/demultiplex; other protected mode, not even protection can be carried out or adopt to the wavelength/wavestrip of other multiplex/demultiplex according to example.W among Fig. 1 and E have distinguished the both direction of OADM node.
Among Fig. 1 30 promptly can be configured to two fine bidirectional line protected locations; two fine bidirectional line protected location schematic diagrames just shown in Figure 2; can also be configured according to different purposes, but adopted the operation wavelength in the loop or wavestrip are switched to correspondence protection wavelength on another loop of rightabout or the principle of wavestrip is identical.
Adopt Optical Add Drop Multiplexer node apparatus of the present invention to talk about up and down and protect, improved the flexibility of system configuration and the utilance of resource to a great extent at single optical channel (wavelength or wavestrip).When breaking down and when protecting, only the protection passage that breaks down and need protection does not break down, has had the wavelength or the wavelength that does not need protection of other protected modes protections not influenced by it.For just selectively a part of wavelength being linked into the OADM protected location in the DWDM loop network, and to its protection.And remaining wavelength can be used as the DWDM point-to-point, can unprotect or adopt other protected mode, and as 1+1,1: 1 and 1: N etc.Can also be configured to according to a certain percentage switch based on the looped network protection switching of wavestrip or based on the protection of wavelength, even the mixing situation of dual mode.Therefore networking is convenient flexibly.
Description of drawings
Fig. 1: the general construction schematic diagram that the present invention is based on two fine bi-directional light add drop multiplex nodes of wavelength or wavestrip;
Fig. 2: the present invention can be flexibly up and down call business based on two fine bidirectional line protected location schematic diagrames wavelength or wavestrip;
Fig. 3: the fixing call business up and down of the present invention based on two fine bidirectional line protected location schematic diagrames wavelength or wavestrip;
Fig. 4: the present invention can be flexibly up and down call business based on two fine one-way line protected location schematic diagrames wavelength or wavestrip;
Fig. 5: the fixing call business up and down of the present invention based on two fine one-way line protected location schematic diagrames wavelength or wavestrip;
Fig. 6: based on two fine bi-directional light add drop multiplex looped networks of wavelength or wavestrip;
Fig. 7: based on two fine unidirectional Optical Add Drop Multiplexer looped networks of wavelength or wavestrip;
Fig. 8: the two fine bi-directional light add drop multiplex looped network protection view when the optical fiber link between node 1 and the node 4 breaks down based on wavelength;
Fig. 9: the two fine bi-directional light add drop multiplex looped network protection view during node 4 node failures based on wavelength;
Figure 10: the two fine unidirectional Optical Add Drop Multiplexer looped network protection view when the optical fiber link between node 1 and the node 4 breaks down based on wavelength;
Figure 11: the two fine unidirectional Optical Add Drop Multiplexer looped network protection view during node 4 node failures based on wavelength.
Embodiment
Specify the embodiment of Optical Add Drop Multiplexer node apparatus of the present invention below in conjunction with Fig. 2 to Figure 11, these embodiment are only in order to further specify the present invention, rather than restriction the present invention.
Fig. 2 is the structure chart based on two fine bidirectional line protected locations 30 of wavelength or wavestrip.Finish the two fine bidirectional line protections that need protection professional in the OADM ring based on two fine bidirectional line protected locations of wavelength or wavestrip.What this unit further was finished local wavelength talks about function flexibly up and down, and wherein K3 and K4 design in order to talk about wavelength up and down flexibly.With K3 is example, is pass-through state when port 9 and 10 interconnection, does not talk about up and down.And link down the words mouth when port 9, when port one 0 is linked the words mouth, have and talk about wavelength up and down.Adopt the structure of Fig. 3, the words up and down of local wavelength are fixed.
The detailed description of this unit is made up of four 2 * 2 optical switches 32 as shown in Figure 2, is respectively K1, K2, K3 and K4.The optical fiber line as shown in FIG. between each optical switch.Wherein K1 has two states, straight-through and switch status.Port one and 3 connects when straight-through, and 2 and 4 connect.When being in switch status, 1 and 2 connect, and 3 and 4 connect.Same K2 port 5 and 7 when straight-through connects, and 6 and 8 connect.5 and 6 connect when switch status, and 7 and 8 connect.K1 and K2 are the first order switch and the second level switch of protected location; wherein 5 ports of 1 port of K1 and K2 are the first input end mouth; 3 ports of K1 and 7 ports of K2 are first output port; 4 ports of K1 and 8 ports of K2 are second input port, and 2 ports of K1 and 6 ports of K2 are second output port.Middle K3 and K4 are responsible for talking about function flexibly up and down, do not have local service when straight-through and talk about up and down, have local service to talk about up and down during crossing condition.
Lacked optical switch K3 and K4 among Fig. 3, thereby if port 3 and 5 is direct-connected under the mode in Fig. 3, port 4 and 6 is direct-connected, does not then have local service and talks about up and down.
The APS agreement of the collaborative looped network of optical switch K1 among Fig. 2 and Fig. 3 and K2 is finished the APS (APS) of two fine bidirectional line protections of looped network; if this node is the node of both sides, fault point when breaking down; then that optical switch near the fault point is switched among K1 and the K2; and another is for straight-through, and node is in switch status.Other node K1 and K2 away from the fault point all are in pass-through state, and node is in pass-through state.
In the protection of two fine one-way lines, the optical fiber of turnover OADM node is divided into working optical fibre and protection optical fiber, and as in Fig. 1, the optical fiber that A can be linked to each other with B point is as working optical fibre, and the optical fiber that links to each other with D with C is as protecting optical fiber.Business on the network transmits on working optical fibre at ordinary times, and protection optical fiber is reserved as the usefulness of protection.When working optical fibre or OADM node break down,, thereby reach the effect of configuration service on the protecting network at both sides, fault point line loopback.This is the OADM of typical two fine one-way line protections.
By Optical Add Drop Multiplexer node apparatus of the present invention, working optical fibre and protection some wavelength or the wavestrip in the optical fiber can be taken out and done two fine one-way lines protections, and remaining wavelength or wavestrip can adopt other protected modes such as unprotect or 1+1.Solid line based on the OADM node configuration of the two fine one-way lines protection of wavelength or wavestrip still as shown in fig. 1.Based on the structure of two fine one-way line protected locations 30 of wavelength or wavestrip shown in Figure 4 and 5.
According to the difference of OADM unit make up can also select to finish local wavelength talk about function flexibly up and down, if adopted structure shown in Figure 4 could finish local wavelength talk about function flexibly up and down, and adopt the talking about up and down of script for story-telling ground wavelength of the structure of Fig. 5 to fix.The detailed description of this elementary cell is made up of three 2 * 2 optical switches 32 as shown in Figure 4, is respectively K1, K2 and K3.The optical fiber line as shown in FIG. between each optical switch.Wherein K1 has two states, straight-through and switch status.Port one and 3 connects when straight-through, and 2 and 4 connect.When being in switch status, 1 and 2 connect, and 3 and 4 connect.Same K2 port 5 and 7 when straight-through connects, and 6 and 8 connect.5 and 6 connect when switch status, and 7 and 8 connect.Middle K3 is responsible for talking about up and down flexibly function, and port 9 and 10 connects when straight-through, and 11 and 12 connect, and no local service is talked about up and down, and port 9 and 12 connects during crossing condition, and 10 and 11 connect, and have local service to talk about up and down.
Unique optical switch K3 that lacked among Fig. 5, thus if port 3 and 5 is direct-connected under the mode situation in Fig. 5, does not then have local service and talk about up and down.If port 3 and down words mouthful connect and 5 and last words mouthful connect, then talk about up and down for the local service of fixing.
The APS agreement of the collaborative looped network of optical switch K1 among Fig. 4 and Fig. 5 and K2 is finished the APS (APS) of two fine bidirectional line protections of looped network; if this node is the node of both sides, fault point when breaking down; then that optical switch near the fault point is switched among K1 and the K2; and another is for straight-through, and node is in switch status.Other node K1 and K2 away from the fault point all are in pass-through state, and node is in pass-through state.
Protect looped networks to see Fig. 6 and shown in Figure 7 by the two fine two-way and two fine one-way lines that OADM node described above makes up based on wavelength or wavestrip.Wavelength/the wavestrip of operation wavelength/wavestrip, protection wavelength/wavestrip and non-OADM route protection has been described among the figure, and a pair of business configuration between node 1 and the node 3 (this business is protected by OADM two fine two-way/one-way lines).
Can also support extra traffic at Fig. 2 and device shown in Figure 4, the protection path can transmit extra traffic under the normal condition, and can utilize the optical switch K3 or the K4 of the passage at protection path place to talk about up and down flexibly, as Fig. 2 and shown in Figure 4.When master channel breaks down, interrupt extra traffic, pairing optical switch becomes pass-through state.And inherited all advantages of two fine bidirectional line protections, as disposing more extra traffic, under the situation of even branch business, the wavelength in the network can be reused or the like.
Fig. 6 to Figure 11 is the schematic diagram of the normal operating conditions and the guard mode of Optical Add Drop Multiplexer loop.
In two fine two-way OADM looped networks based on wavelength/wavestrip shown in Figure 6, establishing every fibre has 8 wavelength.Four wavelength are wherein arranged for being OADM two fine bidirectional protectives, i.e. λ 1-λ 4.Four wavelength X 5-λ 8 that wavelength is non-OADM route protection.The exceptionally fine and interior fibre of OADM among Fig. 6, then outer fine λ 1 and λ 2 are operation wavelength, and the λ 1 of interior fibre and λ 2 are the protection wavelength, and the λ 3 of interior fibre and λ 4 are operation wavelength, and outer fine λ 3 and λ 4 are the protection wavelength.And λ 5-λ 8 is not influenced by the OADM route protection, can be unprotect, 1+1 protection or the like.
In two fine unidirectional OADM looped networks based on wavelength/wavestrip shown in Figure 7, establishing every fibre has 8 wavelength.Four wavelength are wherein arranged for being OADM two fine bidirectional protectives, i.e. λ 1-λ 4.Four wavelength X 5-λ 8 that wavelength is non-OADM route protection.The exceptionally fine and interior fibre of OADM among Fig. 7, then outer fine λ 1-λ 4 is an operation wavelength, the λ 1-λ 4 of interior fibre is the protection wavelength.And the λ 5-λ 8 on interior fibre and the outer fibre is not influenced by the OADM route protection, can be unprotect, 1+1 protection or the like.
Fig. 8 protection based on two fine two-way OADM looped networks of wavelength and wavestrip when the single-point link failure is switched.Node 1 and node 4 in the both sides, fault point; be looped back on corresponding interior fine or outer fine the protection wavelength or wavestrip by the wavelength or the wavestrip of OADM two fine bidirectional line protections; and be not subjected to the wavelength or the wavestrip of OADM two fine bidirectional line protections unaffected, or start the protected mode (as 1+1 protection) of oneself.
Fig. 9 protection based on two fine two-way OADM looped networks of wavelength and wavestrip when the node failure is switched.Node 1 and node 3 in the both sides, fault point; be looped back on corresponding interior fine or outer fine the protection wavelength or wavestrip by the wavelength or the wavestrip of OADM two fine bidirectional line protections; and be not subjected to the wavelength or the wavestrip of OADM two fine bidirectional line protections unaffected, or start the protected mode (as 1+1 protection) of oneself.
Figure 10 protection based on two fine unidirectional OADM looped networks of wavelength and wavestrip when the single-point link failure is switched.Node 1 and node 4 in the both sides, fault point; be looped back on corresponding interior fine the protection wavelength or wavestrip by the wavelength or the wavestrip of OADM two fine one-way line protections; and be not subjected to the wavelength or the wavestrip of OADM two fine one-way line protections unaffected, or start the protected mode (as 1+1 protection) of oneself.
Figure 11 protection based on two fine unidirectional OADM looped networks of wavelength and wavestrip when the node failure is switched.Node 1 and node 3 in the both sides, fault point; be looped back on corresponding interior fine the protection wavelength or wavestrip by the wavelength or the wavestrip of OADM two fine one-way line protections; and be not subjected to the wavelength or the wavestrip of OADM two fine one-way line protections unaffected, or start the protected mode (as 1+1 protection) of oneself.
At the OADM of both sides, fault point intranodal; be in switch status based on one among K1 in two fine two-way/one-way line protected locations of wavelength/wavestrip and the K2; node is in switch status, as the front to the description of optical switch switch status and the description of node switches state.And other node is in pass-through state.
Claims (5)
1. Optical Add Drop Multiplexer node apparatus based on the protection of wavelength or wavestrip comprises:
Two channel-splitting filters, to be decomposed into single wavelength of multichannel or the single wavestrip light signal of multichannel from the interior ring of rightabout transmitting optical signal, multi-wavelength in the every road of outer shroud two-way optical fiber or many wavestrips light signal, and single wavelength or single wavestrip signal after these are decomposed are transferred to the route protection unit;
Two wave multiplexers, will be from the single wavelength of the multichannel of route protection unit or the single wavestrip signal of multichannel two direction transmitting optical signals according to the synthetic respectively multi-wavelength in the direction of propagation or many wavestrips, and with these two direction light signals after synthetic be sent to respectively two rightabout on the ring, outer shroud two-way optical fiber;
Optical Add Drop Multiplexer operation wavelength of transmitting in inner and outer rings optical fiber that needs protection or wavestrip all have correspondence protection wavelength or the wavestrip of reserving in opposite Fiber In The Loop FITE;
It is characterized in that this device has Optical Add Drop Multiplexer two fine bidirectional protective ring route protection unit, comprise many group cascaded switchs in this route protection unit;
Every group of cascaded switch is made up of the first order, two 2 * 2 optical switch cascades in the second level, every grade of switch all has two inputs and two outputs, an input of the first order is connected respectively from a channel-splitting filter of inner and outer rings rightabout two-way optical fiber and each one tunnel single wavelength or single wavestrip light signal of a wave multiplexer with an output, and a partial input is connected respectively from a channel-splitting filter of inner and outer rings rightabout two-way optical fiber and each one tunnel single wavelength or single wavestrip light signal of a wave multiplexer with an output;
In normal operating conditions, above-mentioned first, second grade switch is pass-through state, the first input end, first output that are first order switch are straight-through, the first input end of second level switch, first output lead directly to, second input of first order switch, second output lead directly to, and second input of second level switch, second output lead directly to;
In guard mode, in the node apparatus of both sides, fault point, be switch status near the switch of fault point in the first order and the second level switch, be pass-through state away from the switch of fault point; Under pass-through state, the first input end of this switch links to each other with first output, and second input links to each other with second output; The first input end of this switch links to each other with second output under switch status, second input links to each other with first output, thereby the light signal of operation wavelength of normal propagation in the optical fiber or wavestrip is switched in protection wavelength corresponding in another road rightabout optical fiber or the wavestrip propagates, or will be switched in operation wavelength that optical fiber Central Plains, former road direction propagates or the wavestrip at protection wavelength or wavestrip light signal and continue to propagate;
The first order at cascaded switch, between the switch of the second level, insert two other 2 * 2 optical switch, be used for the flexible of passage one and passage two, under talk about port, wherein insert the first input end of a switch and first output that first output is connected respectively to first order switch and the first input end of second level switch, second input of this switch and second output respectively as passage one flexibly on, under talk about port, the first input end of another switch that inserts and first output are connected respectively to second output of first order switch and second input of second level switch, second input of this switch and second output respectively also as passage two flexibly on, under talk about port.
2. according to the Optical Add Drop Multiplexer node apparatus of claim 1; it is characterized in that all propagating in the inner and outer rings two-way optical fiber of propagating optical signal in the opposite direction the Optical Add Drop Multiplexer light signal of operation wavelength or wavestrip, also all reserve corresponding protection wavelength or wavestrip in the two-way optical fiber.
3. Optical Add Drop Multiplexer node apparatus based on the protection of wavelength or wavestrip comprises:
Two channel-splitting filters, to be decomposed into single wavelength of multichannel or the single wavestrip light signal of multichannel from the interior ring of rightabout transmitting optical signal, multi-wavelength in the every road of outer shroud two-way optical fiber or many wavestrips light signal, and single wavelength or single wavestrip signal after these are decomposed are transferred to the route protection unit respectively;
Two wave multiplexers, will be from the single wavelength of the multichannel of route protection unit or the single wavestrip signal of multichannel two direction transmitting optical signals according to the synthetic respectively multi-wavelength in the direction of propagation or many wavestrips, and with these two direction light signals after synthetic be sent to respectively two rightabout on the ring, outer shroud two-way optical fiber;
Optical Add Drop Multiplexer operation wavelength of transmitting in inner and outer rings optical fiber that needs protection or wavestrip all have correspondence protection wavelength or the wavestrip of reserving in opposite Fiber In The Loop FITE;
It is characterized in that this device has Optical Add Drop Multiplexer two fine bidirectional protective ring route protection unit, comprise many group cascaded switchs in this route protection unit;
Every group of cascaded switch in the route protection unit is made up of the first order, two 2 * 2 optical switch cascades in the second level, every grade of switch all has two inputs and two outputs, an input of the first order is connected respectively from a channel-splitting filter of inner and outer rings rightabout two-way optical fiber and each one tunnel single wavelength or single wavestrip light signal of a wave multiplexer with an output, and a partial input is connected respectively from a channel-splitting filter of inner and outer rings rightabout two-way optical fiber and each one tunnel single wavelength or single wavestrip light signal of a wave multiplexer with an output;
In normal operating conditions, above-mentioned first, second grade switch in every group of cascaded switch is pass-through state, the first input end, first output that are first order switch are straight-through, the first input end of second level switch, first output lead directly to, second input of first order switch, second output lead directly to, and second input of second level switch, second output lead directly to;
In guard mode, in the node apparatus of both sides, fault point, be switch status near the switch of fault point in the first order and the second level switch, be pass-through state away from the switch of fault point; Under pass-through state, the first input end of this switch links to each other with first output, and second input links to each other with second output; The first input end of this switch links to each other with second output under switch status, second input links to each other with first output, thereby the light signal of operation wavelength of normal propagation in the optical fiber or wavestrip is switched in protection wavelength corresponding in another road rightabout optical fiber or the wavestrip propagates, or will be switched in operation wavelength that optical fiber Central Plains, former road direction propagates or the wavestrip at protection wavelength or wavestrip light signal and continue to propagate;
Be used for fixing when talking about node apparatus up and down at the circuit protected location, at first output of first order switch, second input of first order switch, the first input end of second level switch, second output of second level switch, directly directly connect respectively with the corresponding mouth of words up and down is fixing; Or when the circuit protected location was used for leading directly to the website device, first output of first order switch directly linked to each other with the first input end of second level switch, and second input of first order switch and second output of second level switch are direct-connected.
4. Optical Add Drop Multiplexer node apparatus based on the protection of wavelength or wavestrip comprises:
Two channel-splitting filters, to be decomposed into single wavelength of multichannel or the single wavestrip light signal of multichannel from the interior ring of rightabout transmitting optical signal, multi-wavelength in the every road of outer shroud two-way optical fiber or many wavestrips light signal, and single wavelength or single wavestrip signal after these are decomposed are transferred to the route protection unit;
Two wave multiplexers, will be from the single wavelength of the multichannel of route protection unit or the single wavestrip signal of multichannel two direction transmitting optical signals according to the synthetic respectively multi-wavelength in the direction of propagation or many wavestrips, and with these two direction light signals after synthetic be sent to respectively two rightabout on the ring, outer shroud two-way optical fiber;
Under Optical Add Drop Multiplexer operation wavelength or wavestrip need protection situation in interior ring optical fiber, in the opposite direction reserve corresponding protection wavelength or wavestrip in the outer shroud optical fiber; Perhaps Optical Add Drop Multiplexer operation wavelength or wavestrip need protection under the situation in outer shroud optical fiber, reserve corresponding protection wavelength or wavestrip in the ring optical fiber in the opposite direction;
It is characterized in that this device has Optical Add Drop Multiplexer two fine unidirectional protection ring route protection unit, comprise many group cascaded switchs in the route protection unit:
Every group of cascaded switch is made up of the first order, two 2 * 2 optical switch cascades in the second level, every grade of switch all has two inputs and two outputs, an input of the first order is connected respectively from a channel-splitting filter of inner and outer rings rightabout two-way optical fiber and each one tunnel single wavelength or single wavestrip light signal of a wave multiplexer with an output, and a partial input is connected respectively from a channel-splitting filter of inner and outer rings rightabout two-way optical fiber and each one tunnel single wavelength or single wavestrip light signal of a wave multiplexer with an output;
In normal operating conditions, above-mentioned first, second grade switch is pass-through state, the first input end, first output that are first order switch are straight-through, the first input end of second level switch, first output lead directly to, second input of first order switch, second output lead directly to, and second input of second level switch, second output lead directly to;
In guard mode, in the node apparatus of both sides, fault point, be switch status near the switch of fault point in the first order and the second level switch, be pass-through state away from the switch of fault point; Under pass-through state, the first input end of this switch links to each other with first output, and second input links to each other with second output; The first input end of this switch links to each other with second output under switch status, second input links to each other with first output, propagates thereby the light signal of operation wavelength of normal propagation in the optical fiber or wavestrip is switched in protection wavelength corresponding in another road rightabout optical fiber or the wavestrip;
Between the first order of cascaded switch, second level switch, insert the flexible upper and lower words port that one 2 * 2 optical switch is used for passage one, wherein the first input end of institute's insertion switch and first output are connected respectively to first output of first order switch and the first input end of second level switch, and this institute inserts second input of switch and second output respectively as the flexible upper and lower words port of passage one.
5. Optical Add Drop Multiplexer node apparatus based on the protection of wavelength or wavestrip comprises:
Two channel-splitting filters, to be decomposed into single wavelength of multichannel or the single wavestrip light signal of multichannel from the interior ring of rightabout transmitting optical signal, multi-wavelength in the every road of outer shroud two-way optical fiber or many wavestrips light signal, and single wavelength or single wavestrip signal after these are decomposed are transferred to the route protection unit;
Two wave multiplexers, will be from the single wavelength of the multichannel of route protection unit or the single wavestrip signal of multichannel two direction transmitting optical signals according to the synthetic respectively multi-wavelength in the direction of propagation or many wavestrips, and with these two direction light signals after synthetic be sent to respectively two rightabout on the ring, outer shroud two-way optical fiber;
Under Optical Add Drop Multiplexer operation wavelength or wavestrip need protection situation in interior ring optical fiber, in the opposite direction reserve corresponding protection wavelength or wavestrip in the outer shroud optical fiber; Perhaps Optical Add Drop Multiplexer operation wavelength or wavestrip need protection under the situation in outer shroud optical fiber, reserve corresponding protection wavelength or wavestrip in the ring optical fiber in the opposite direction;
It is characterized in that this device has Optical Add Drop Multiplexer two fine unidirectional protection ring route protection unit, the route protection unit comprises many group cascaded switchs;
Every group of cascaded switch is made up of the first order, two 2 * 2 optical switch cascades in the second level, every grade of switch all has two inputs and two outputs, an input of first order switch is connected respectively from a channel-splitting filter of inner and outer rings rightabout two-way optical fiber and each one tunnel single wavelength or single wavestrip light signal of a wave multiplexer with an output, and an input of second level switch is connected respectively from a channel-splitting filter of inner and outer rings rightabout two-way optical fiber and each one tunnel single wavelength or single wavestrip light signal of a wave multiplexer with an output;
In normal operating conditions, above-mentioned first, second grade switch is pass-through state, the first input end, first output that are first order switch are straight-through, the first input end of second level switch, first output lead directly to, second input of first order switch, second output lead directly to, and second input of second level switch, second output lead directly to;
In guard mode, in the node apparatus of both sides, fault point, be switch status near the switch of fault point in the first order and the second level switch, be pass-through state away from the switch of fault point; Under pass-through state, the first input end of this switch links to each other with first output, and second input links to each other with second output; The first input end of this switch links to each other with second output under switch status, second input links to each other with first output, propagates thereby the light signal of operation wavelength of normal propagation in the optical fiber or wavestrip is switched in protection wavelength corresponding in another road rightabout optical fiber or the wavestrip;
Be used for fixing when talking about node apparatus up and down at the circuit protected location, between second input of second output of first order switch and second level switch, directly connect, and first output of the first input end of first order switch and second level switch is fixing and up and down words mouthful be connected, be used for fixing and talk about up and down; Or when the circuit protected location was used for leading directly to the website device, first output of first order switch directly linked to each other with the first input end of second level switch, and second input of first order switch and second output of second level switch are direct-connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031347770A CN1255965C (en) | 2003-09-30 | 2003-09-30 | Optical brancking-complexing node device based on wavelength or waveband protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031347770A CN1255965C (en) | 2003-09-30 | 2003-09-30 | Optical brancking-complexing node device based on wavelength or waveband protection |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1529450A CN1529450A (en) | 2004-09-15 |
| CN1255965C true CN1255965C (en) | 2006-05-10 |
Family
ID=34286188
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB031347770A Expired - Fee Related CN1255965C (en) | 2003-09-30 | 2003-09-30 | Optical brancking-complexing node device based on wavelength or waveband protection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1255965C (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100388708C (en) * | 2005-01-01 | 2008-05-14 | 华为技术有限公司 | Grouped light channel sharing protection method and system |
| CN1819706B (en) * | 2006-03-15 | 2010-11-10 | 重庆邮电学院 | Light waveband exchanging network node structure based on adjusting filter |
| CN101162949A (en) * | 2006-10-13 | 2008-04-16 | 中兴通讯股份有限公司 | System and method for preventing from loop self-excited optical ring network channel sharing protection |
| CN101227238B (en) * | 2008-02-03 | 2012-05-09 | 中兴通讯股份有限公司 | Method and apparatus for multipoint fault protection |
| CN101729347B (en) * | 2008-10-27 | 2012-08-15 | 华为技术有限公司 | Method, system and device for protecting circuit loop |
| US8929738B2 (en) * | 2012-05-30 | 2015-01-06 | Telefonaktiebolaget L M Ericsson (Publ) | Resilience in an access subnetwork ring |
| JP2015506148A (en) * | 2012-06-15 | 2015-02-26 | ▲ホア▼▲ウェイ▼海洋網絡有限公司 | Method, apparatus and system for disaster recovery of optical communication systems |
| CN104904140B (en) | 2013-12-25 | 2017-04-19 | 华为海洋网络有限公司 | Optical branching unit for optical add drop multiplexing |
-
2003
- 2003-09-30 CN CNB031347770A patent/CN1255965C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1529450A (en) | 2004-09-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6567194B1 (en) | Optical communication network and protection methods | |
| US6195367B1 (en) | Architectural arrangement for bandwidth management in large central offices | |
| CN1245604A (en) | Inter-ring cross-connect for survivable multi-wavelength optical communication networks | |
| CN1805321A (en) | Wavelength-division multiplexing-passive optical network | |
| CN1279548A (en) | Optical spliting device for circular network having wave division multiplex | |
| CN1820438A (en) | Method for providing extra-traffic paths with connection protection in communication network, related network and computer program product therefor | |
| EP1069720A2 (en) | Communications systems | |
| CN1435070A (en) | Four-fiber ring optical cross-connect system using 4*4 switch matrices | |
| CN1516382A (en) | Bidirectional wavelength division multiplexing self recovering ring network | |
| CN1255965C (en) | Optical brancking-complexing node device based on wavelength or waveband protection | |
| US6061482A (en) | Channel layered optical cross-connect restoration system | |
| US7715711B2 (en) | Wavelength selective switch design configurations for mesh light-trails | |
| CN1852051A (en) | Method and apparatus for sharing protection of grouped light path | |
| CN1688909A (en) | Optical cross connect apparatus and method | |
| US7085447B2 (en) | System for optically demultiplexing wavelength bands | |
| US6885822B1 (en) | Wavelength and filter arrangement for WDM networks | |
| CN1235357C (en) | Full optical packet switching node structure for supporting burst or non-burst businesses | |
| CN1684381A (en) | Realizing method and device for optical path shared protection in wave division complex system | |
| CN1162998C (en) | Multifnctional light split/insersion multiplexer | |
| CN1209647C (en) | Optical cross-linking system | |
| US6493118B1 (en) | Add/drop capability for ultra-high speed dense wavelength division multiplexed systems using a wavelength bus architecture | |
| CN101001116B (en) | Method for implementing virtual MSP-ring | |
| CN1168349C (en) | Optical cross connection node for crossing between fiber link and wavelength groups | |
| JP2006345069A (en) | Method for reserving wavelength of spare channel, and optical transmission apparatus | |
| JP4408542B2 (en) | Optical system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060510 Termination date: 20150930 |
|
| EXPY | Termination of patent right or utility model |