CN102437875A - Automatic optical fiber switching device for intensive wavelength division multiplexing system - Google Patents
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- CN102437875A CN102437875A CN2011104464020A CN201110446402A CN102437875A CN 102437875 A CN102437875 A CN 102437875A CN 2011104464020 A CN2011104464020 A CN 2011104464020A CN 201110446402 A CN201110446402 A CN 201110446402A CN 102437875 A CN102437875 A CN 102437875A
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Abstract
本发明涉及一种用于密集波分复用系统切换装置，特别是一种密集波分复用系统中的光纤自动切换装置，其结构要点在于，包括有一条备用光纤、第一光分路器、第一光功率监控模块、光路自动保护模块以及第一光开关模块，第一光分路器以及第一光开关模块依序串接在主用光纤线路中，第一光分路器的光信号输出端与通过第一光功率监控模块与光路自动保护模块连接，备用光纤连接到第一光开关模块的开关端。优点在于，实现了快速切换光路、保证通信的稳定、安全、消除节点失效的安全隐患，避免了环形网络自愈体系瓦解，确保业务通道的畅通，减小了对用户的影响，为电力安全生产提供了数据保证。
The present invention relates to a switching device for dense wavelength division multiplexing system, especially a kind of optical fiber automatic switching device in dense wavelength division multiplexing system. , the first optical power monitoring module, the optical path automatic protection module and the first optical switch module, the first optical splitter and the first optical switch module are sequentially connected in the main optical fiber line, the optical splitter of the first optical splitter The signal output end is connected to the optical path automatic protection module through the first optical power monitoring module, and the spare optical fiber is connected to the switch end of the first optical switch module. The advantage is that it realizes fast switching of optical paths, ensures the stability and security of communication, eliminates the potential safety hazard of node failure, avoids the collapse of the self-healing system of the ring network, ensures the smooth flow of business channels, reduces the impact on users, and contributes to the safety of power production. Data guarantees are provided.
Description
Technical field
The present invention relates to a kind of dense wavelength division multiplexing system switching device shifter that is used for, particularly a kind of optical fiber automatic switching control equipment in dense wavelength division multiplexing system.
Background technology
Transmission network; It is most important basic network in the communication network; The emphasis of transmission network is the development Networks of Fiber Communications, and the construction of the optical cable basis that to be Networks of Fiber Communications build up, and is economizing aspect net, the construction of regional backbone optical cable circuit at present; The main construction has the overhead ground wire composite cable (OPGW) of electric power system characteristic or do not have metal self-support cable (ADSS), and forms Fujian electrical power mains DWDM+SDH optical fiber ring network communication network.
Wherein the construction of OPGW, ADSS receives the restriction that power circuit is built, and generally has only an optical cable in a direction, and the ordinary optical cable of going down town is then opposite, because investment is less, a direction generally has the optical cable of a plurality of different routes.Economizing net DWDM+SDH optical fiber ring network communication network and be with annular optical cable serves as to rely on to have formed the loop network structure, and the SDH system that it carried has all formed optical fiber self-healing looped network with this.
Yet the weak point of above-mentioned optical cable construction and province net DWDM+SDH optical fiber ring network communication network is:
1, economizes net DWDM+SDH optical fiber ring network communication network and receive technical characterstic and the long influence of lightguide cable link that wavelength-division optical link itself can only application 2 core optical cable; Make its concentrated expression have the vulnerability of anti-N-2 fault, this weak problem mainly shows: A, each alternate communication system (mainly being the 2M passage that the optical-fiber network interconnection of 34M PDH digital microwave and 155M area provides) still can't provide enough bandwidth fully; There are the potential safety hazard of wavelength-division node failure in B, irresistible 2 interruptions of current network, in case emersion wave partial node actual effect will cause important service (electrical production and the management service) information of these websites can't send to province company and bring serious consequence.
2, because the development need of electric power networks; These OPGW often face the power circuit maintenance and interrupt; Sometimes need with power circuit cut-off increase or reconfiguration to new transformer station, certainly will cause certain wavelength-division link (multiplex section, i.e. OTM section or Link, Span) to interrupt; The SDH loop network self-healing system that causes being carried is disintegrated, and becomes chain structure.Such as: this state is economized and is the most seriously occurred in 17-December 28 November in 2007, and the plan that OPGW and ordinary optical cable took place in 40 day time is cut-off up to 11 times, and the cumulative time is near 100h.Write down from whole year operation in 2007, such OPGW plan is cut-off accumulative total and has been taken place 18 times, and the cumulative time is near 127h.
3, because current being in during the fast development of city; The built on stilts optical cable of normal appearance need change the ground mode of burying into; Also optical cable is cut off temporarily, also can occur simultaneously unexpected interruption of optical cables (such as hung up by Overheight Vehicles, stolen, cable explodes and burns etc.).
4, in wavelength-division looped network interruption of optical cables case; Cut-offfing of OPGW is planned; And mostly the city interruption of optical cables is uncertain, in case 2 places appear in the looped network optical cable when interrupting, it is out of touch communication node and the province company away from province company to occur between two points of interruption; Cause a large number of services passage to interrupt, have influence on electric power safety production and business administration.
The problems referred to above are traced it to its cause, and the city optical cable that the dense wavelength division system transfers to each ground all has both direction, and can only utilize the ordinary optical cable of this both direction, and reason is that wavelength-division system two equipment rooms are put connection through light, can only connect 2 core tail optical fibers.In addition, the ordinary optical cable of going down town but has the characteristic of multi-direction multirouting, but can't offer wavelength-division system simultaneously and effectively use.
Summary of the invention
The objective of the invention is to weak point according to prior art the optical fiber automatic switching control equipment in the dense wavelength division multiplexing system that a kind of information transmits safety, do not interrupt or reduce break period is provided.
The objective of the invention is to realize through following approach:
Optical fiber automatic switching control equipment in the dense wavelength division multiplexing system; Its structural feature is; Include a subsequent use optical fiber, first optical branching device, the first optical power monitoring module, the automatic protection module of light path and first optical switch module; First optical branching device and first optical switch module are serially connected in main with in the fibre circuit in regular turn; The light signal output end of first optical branching device be connected with the automatic protection module of light path through the first optical power monitoring module, subsequent use optical fiber is connected to the switch terminals of first optical switch module; Wherein: the automatic protection module of light path includes comparison process unit and connected reference cell; The input of comparison process unit is connected with the first optical power monitoring module; Trigger output and be connected, store the switches light performance number of setting in the reference cell with first optical switch module.
Said first optical branching device is from leading with cutting out partial light signal the fibre circuit; This light signal sends the first optical power monitoring module to; The optical power monitoring module records main luminous power data with fibre circuit, and sends the automatic protection module of light path to through computing; Comparison process unit in the automatic protection module of light path compares the switches light performance number of storing in luminous power data that record and the reference cell; If the optical power value that records in reference range, is then represented current main normal with the optical fiber line traffic, need not to carry out light path and switch; If the optical power value that records has departed from the fiducial value scope; Then represent current main break down with the optical fiber line traffic; This moment, the comparison process unit generated triggering command, and sent to first optical switch module through trigger end, by first optical switch module switch terminals was switched on the subsequent use fibre circuit.
Described subsequent use optical fiber can adopt and the main various ordinary optical cables that distribute in the same way with fibre circuit, to make full use of cable resource.Like this, through to main real-time control measurement, obtain optical power value with the fibre circuit luminous power; And judge whether to carry out light path on this basis and switch; Realized quick switching-over light path, guaranteed stable, the safety of communication, the potential safety hazard of elimination node failure, avoided loop network self-healing system to disintegrate, guarantee the unimpeded of service channel; Reduced influence, for electric power safety production provides the data assurance to the user.
The present invention can further be specially:
Also include second optical branching device and the second optical power monitoring module; Second optical branching device is serially connected in the subsequent use fibre circuit; Its mainly the branch light path be connected to the switch terminals of first switch module; Another minute, light path was connected with the second optical power monitoring module, and the receiving terminal of the comparison process unit in the data output end of the second optical power monitoring module and the automatic protection module of light path is connected.
Break down with fibre circuit when main; When first optical switch module switches to subsequent use optical fiber; The automatic protection module of light path will be monitored subsequent use optical fiber through the second optical power monitoring module, obtain the optical power value of subsequent use optical fiber, judge the communication conditions of this subsequent use optical fiber; Connect with optical fiber line upkeep when main, can switch again fibre circuit according to monitor data.
Described optical power monitoring module includes PIN photo-detector, chopper-zero-stabilized programmable amplifier, programmable filter, A/D converter and the microprocessor that connects in regular turn.
Described PIN is meant the silicon face junction diode, the crystal diode of folder one deck intrinsic semiconductor (or semiconductor of low concentration impurity) structure between P district and N district.In the optical power monitoring module, the part luminous power that fibre circuit is separated through optical branching device converts photoelectric current into by the detection of PIN photo-detector; Convert current signal to voltage signal by follow-up chopper-zero-stabilized programmable amplifier; Promptly realize I/V conversion and amplification, after programmable filter filtering copped wave additional components and interference signal, deliver to A/D converter; Become the digital signal corresponding to the input optical power level, (CPU) carries out data processing by microprocessor.CPU can be provided with range state and filter status automatically according to the size of injecting luminous power, can accept input instruction simultaneously, accomplishes assigned work.
Described PIN photo-detector can be selected high speed PIN photo-detector of new generation for use, is the photo-detector of OPD-P-3-A-85-FP like model.The high speed PIN of a new generation photo-detector can cover+and 23dBm is to the power bracket of-50dBm; Effectively survey wavelength and can arrive 850nm to 1700nm, sample rate can reach 1ms, can rule out Link State fast; And then send control command fast; Realize the effect of quick optical link switchover, make customer impact minimum, reach the purpose of uninterrupted business.
In optical fiber telecommunications system, mainly contain two types light path model, technical scheme according to the present invention is set forth these two kinds of light path models:
At first be the light path model of 1:1 type:
Include second optical switch module, its control end is connected with the trigger end of the automatic protection module of light path, and the input light path of second optical switch module is one the tunnel, and output light path is a two-way, and is promptly main with output light path and subsequent use output light path.
In economizing net DWDM+SDH optical fiber ring network communication network, because dense wavelength division system two equipment rooms are put connection through light, can only connect 2 core tail optical fibers, therefore all be the light path pattern of one of a receipts.Receiving on the link; When the main optical-fiber line fault of using; After switching to subsequent use optical fiber through the optical fiber automatic switching control equipment; Its transmission link also should switch on the subsequent use optical fiber and transmit, and therefore realizes that through second optical switch module its handoff trigger signal is provided by the automatic protection module of optical fiber to sending the switching of link.
Like this; In the 1:1 type light path model; Carry out Route Selection with the optical fiber automatic switching control equipment to sending optical channel at transmitting terminal, protected light signal to transmit (publishing) with optical fiber (being also referred to as working optical fibre) or subsequent use optical fiber (perhaps being called protection optical fiber) along main.With the optical fiber automatic switching control equipment main light signal with optical fiber and subsequent use optical fiber is carried out selective reception (choosing is received) equally at receiving terminal; In order to guarantee that receive path and sendaisle can be consistent; When working optical fibre broke down, transmitting terminal and receiving terminal should switch to main with optical fiber (subsequent use optical fiber) simultaneously.The mode of operation that is 1:1 type optical fiber automatic switchover technology is to publish the receipts pattern, receives and receive and send out when to send out any an end disconnected switching together.
Second kind is the light path pattern of 1+1 type:
Include the 3rd optical branching device, its input connects the light path transmitting terminal, and the light signal after the separation connects main with optical fiber and subsequent use optical fiber respectively.
Because the transmitting terminal of 1+1 type light path pattern adopts optical branching device (Splitter) that light signal is separated; Usually adopt the 50:50 optical branching device (in practical application since main with optical fiber and subsequent use optical line by different; Can adopt the optical branching device of different splitting ratios), the light signal after the separation transmits (concurrent) main with optical fiber and subsequent use optical fiber respectively.Adopt the optical channel selector to select (choosing is received) with the light signal of optical fiber and subsequent use optical fiber at receiving terminal optical fiber to main.When main road when breaking down, receiving terminal is selected to receive from subsequent use optical fiber automatically.The mode of operation that is 1+1 type optical fiber automatic switchover technology is that pattern (dual transmitting and receiving) is received in concurrent choosing, and 1+1 makes a start disconnected to switch to make a start during switching.
1+1 light path model is faster switching time than 1:1 light path model, but all satisfies < 50ms (ITU-T standard); Difference is: 1, the major defect of 1+1 is that to insert loss big than 1:1, has objectively reduced the power degree more than needed of original optical link significantly because in engineering design, the redundancy of general light path be 3dB to 5dB, so the scope of application is narrower.(receive and dispatch same cable) and 1:1 can guarantee that optical link always works on the same optical cable,,, the place of particularly suitable is arranged like the current differential protection information in the electric power system for some special users.2,1:1 optical link automatic switchover system can conveniently transmit network management information through subsequent use light path, and 1+1 then can't realize, can only adopt the external autonomous channel to carry out network management communication and transmit.3,1+1 optical fiber automatic switching apparatus transmitting-receiving light path is difficult to guarantee on same optical cable route simultaneously, and is bigger to the influence that designs a model of system, so 1:1 type light path model is an optimal technical scheme.
In sum, the invention provides the optical fiber automatic switching control equipment in a kind of dense wavelength division multiplexing system, the optical power monitoring data that provide according to the optical power monitoring module are as the basis for estimation of diverter switch; Subsequent use optical fiber is provided;, can automatically switch on the subsequent use optical fiber when breaking down main, realize quick switching-over light path, guarantee stable, the safety of communication, the potential safety hazard of elimination node failure with optical fiber; Avoided loop network self-healing system to disintegrate; Guarantee the unimpeded of service channel, reduced influence, for electric power safety production provides the data assurance the user.
Description of drawings
Shown in Figure 1 is the light channel structure sketch map of the optical fiber automatic switching control equipment in the 1:1 type dense wavelength division multiplexing system of the present invention, and R1, T1 are respectively main and receive and dispatch circuit with optical fiber, and R2, T2 are respectively subsequent use optical fiber transmitting-receiving circuit.
Shown in Figure 2 is the light channel structure sketch map of the optical fiber automatic switching control equipment in the 1+1 type dense wavelength division multiplexing system according to the invention, and R1, T1 are respectively main and receive and dispatch circuit with optical fiber, and R2, T2 are respectively subsequent use optical fiber transmitting-receiving circuit.
Shown in Figure 3 is the operation principle structural representation of the optical fiber automatic switching control equipment in the dense wavelength division multiplexing system according to the invention, is example with the 1:1 type.
Below in conjunction with embodiment the present invention is done and to further describe.
Specific embodiment
Most preferred embodiment:
With reference to accompanying drawing 1 and accompanying drawing 2; Optical fiber automatic switching control equipment in the dense wavelength division multiplexing system; Include the master with optical fiber, subsequent use optical fiber, first optical branching device, second optical branching device, the first optical power monitoring module, the second optical power monitoring module, the automatic protection module of light path and first optical switch module.Wherein: first optical branching device and first optical switch module are serially connected in main with in the fibre circuit in regular turn, the light signal output end of first optical branching device be connected with the automatic protection module of light path through the first optical power monitoring module; Second optical branching device is serially connected in the subsequent use fibre circuit; Its mainly the branch light path be connected to the switch terminals of first switch module; Another minute, light path was connected with the second optical power monitoring module, and the first optical power monitoring module and the second optical power monitoring module are connected on first optical switch module through the automatic protection module of light path respectively.
With reference to accompanying drawing 1, in 1:1 type light path model, also include second optical switch module; Its control end is connected with the trigger end of the automatic protection module of light path; The input light path of second optical switch module is one the tunnel, and output light path is a two-way, and is promptly main with output light path and subsequent use output light path.
With reference to accompanying drawing 2, in 1+1 type light path model, also include the 3rd optical branching device, be the splitter of a kind of 50:50, its input connects the light path transmitting terminal, and the light signal after the separation connects main with optical fiber and subsequent use optical fiber respectively.
Among Fig. 1 and Fig. 2, thick line is a light path, and fine rule is a circuit.
With reference to accompanying drawing 3, the optical power monitoring module includes PIN photo-detector, chopper-zero-stabilized programmable amplifier, programmable filter, A/D converter and the microprocessor that connects in regular turn.The automatic protection module of light path includes comparison process unit and connected reference cell; The input of comparison process unit is connected with the first optical power monitoring module; Trigger output and be connected, store the switches light performance number of setting in the reference cell with first optical switch module.
More than each module all can adopt commercially available circuit module or light path module, specifically the PIN photo-detector need be selected high speed PIN photo-detector of new generation for use.Operation principle is said referring to summary of the invention.
Optical fiber automatic switching control equipment in the dense wavelength division multiplexing system of the present invention also has following supplementary module, (not signal in the accompanying drawing):
1, power down protection module.When the power down of optical fiber automatic switching control equipment when (referring to the circuit part dead electricity) system can not break off communication, and remain on original route work, light path can not change its original route equally and works on when device powers up.
2, panel control and indicating section.The user can carry out manual light path switching, the selection of light path switch mode automatically through the button of panel.Indicating section shows the situation that is connected of operational mode state, monitoring optical power indication situation, alarm status, switch prompting and light path.
3, serial ports, network interface control section.The user can be provided with the switches light performance number through serial ports, network interface, the online luminous power situation on the monitoring primary channel.Can also protection system be set through serial ports, network interface and be operated in manual switchover pattern or automatic switchover mode state, and can use the situation of the luminous power of real-time demonstration real-time monitoring equipment passage, and show operating state of current primary channel etc.
4, optical communications module.For the equipment of the automatic light handoff technique of 1:1 type, can adopt the band internal schema to carry out transmission network management information and transmit, realize the real-time monitoring of active and standby optical cable through subsequent use fibre core resource.
The optical fiber automatic switching control equipment is to the impact analysis of dense wavelength division system, and technological difficulties to be solved also comprised when just the optical fiber automatic switching control equipment was used in dense wavelength division multiplexing system:
1, on optical link, increases the optical fiber automatic switchover system; Original system has been produced certain influence, and this is mainly reflected in the intrinsic insertion attenuation of equipment, has increased the total attenuation of link of original link; Therefore reduce collection of letters redundancy, caused original received power to descend.In the test analysis in 5 years, find to design a model as long as the link attenuation still in designing a model, just can directly be prolonged with original.Cross when hanging down in case receive the light receiving power of end, then should adopt EDFA to carry out signal and amplify, on power, make it satisfied.
2, because wavelength-division system is to adopt the monomode fiber transmission as transmission medium, the chromatic dispersion of monomode fiber mainly is material dispersion, waveguide dispersion and refractive profile chromatic dispersion.In the design of dense wavelength division system model; Material dispersion is most important influencing factor, when 10Gbps and above optical link surpass 60 kilometers, brings into use dispersion compensation module; For the communication system of vast capacity, consider to use the functional module that has the slope dispersion compensation.The wavelength-division link is after increasing the optical fiber automatic switching apparatus, because it possesses the transparent transmission characteristic, does not therefore increase material dispersion, explains to possess the condition of using the optical fiber automatic switchover technology.For waveguide dispersion, owing to actually in the engineering have only a kind of pattern (basic mode LP01), the phenomenon of the official post pulse stretching of the group velocity that only needs to consider that propagation constant produces thereupon changing.The wavelength-division link is after increasing the optical fiber automatic switching apparatus, because it possesses the transparent transmission characteristic, propagation constant is unaffected, so waveguide dispersion is also the same with master mould, makes the wavelength-division link possess the condition of using the optical fiber automatic switchover technology.
It is identical with prior art that the present invention does not state part.
Claims (5)
1. the optical fiber automatic switching control equipment in the dense wavelength division multiplexing system; It is characterized in that; Include a subsequent use optical fiber, first optical branching device, the first optical power monitoring module, the automatic protection module of light path and first optical switch module; First optical branching device and first optical switch module are serially connected in main with in the fibre circuit in regular turn; The light signal output end of first optical branching device be connected with the automatic protection module of light path through the first optical power monitoring module, subsequent use optical fiber is connected to the switch terminals of first optical switch module; Wherein: the automatic protection module of light path includes comparison process unit and connected reference cell; The input of comparison process unit is connected with the first optical power monitoring module; Trigger output and be connected, store the switches light performance number of setting in the reference cell with first optical switch module.
2. the optical fiber automatic switching control equipment in the dense wavelength division multiplexing system according to claim 1; It is characterized in that; Also include second optical branching device and the second optical power monitoring module, second optical branching device is serially connected in the subsequent use fibre circuit, its mainly the branch light path be connected to the switch terminals of first switch module; Another minute, light path was connected with the second optical power monitoring module, and the receiving terminal of the comparison process unit in the data output end of the second optical power monitoring module and the automatic protection module of light path is connected.
3. the optical fiber automatic switching control equipment in the dense wavelength division multiplexing system according to claim 1 and 2; It is characterized in that described optical power monitoring module includes PIN photo-detector, chopper-zero-stabilized programmable amplifier, programmable filter, A/D converter and the microprocessor that connects in regular turn.
4. the optical fiber automatic switching control equipment in the dense wavelength division multiplexing system according to claim 1; It is characterized in that; Include second optical switch module, its control end is connected with the trigger end of the automatic protection module of light path, and the input light path of second optical switch module is one the tunnel; Output light path is a two-way, and is promptly main with output light path and subsequent use output light path.
5. the optical fiber automatic switching control equipment in the dense wavelength division multiplexing system according to claim 1 is characterized in that, includes the 3rd optical branching device, and its input connects the light path transmitting terminal, and the light signal after the separation connects main with optical fiber and subsequent use optical fiber respectively.
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| CN103259609A (en) * | 2013-04-18 | 2013-08-21 | 国家电网公司 | Point type high-voltage transmission line optical fiber detection network |
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| CN104753585A (en) * | 2015-04-13 | 2015-07-01 | 国家电网公司 | Intelligent optical fiber distribution device |
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| CN105591688A (en) * | 2015-12-23 | 2016-05-18 | 广东倍增通信设备有限公司 | Fiber switching protection system suitable for fiber switching protection device |
| CN110609214A (en) * | 2019-10-28 | 2019-12-24 | 东北电力大学 | A power system optical cable network online monitoring and fault automatic detection system without blind spots |
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| CN112019262A (en) * | 2020-08-13 | 2020-12-01 | 武汉光迅科技股份有限公司 | Communication station, optical communication system, data transmission method, and storage medium |
| CN112152701A (en) * | 2020-09-01 | 2020-12-29 | 广州汇信特通信技术股份有限公司 | Semi-active WDM wavelength division protection system |
| CN115276794A (en) * | 2022-09-27 | 2022-11-01 | 深圳市光派通信技术有限公司 | Optical fiber link switching method, device, network management equipment and storage medium |
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