CN103441792A - Multi-channel optical fiber automatic backup device for broadcasting network - Google Patents
Multi-channel optical fiber automatic backup device for broadcasting network Download PDFInfo
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Abstract
The invention provides a multi-channel optical fiber automatic backup device for a broadcasting network. A spare optical fiber is added on a framework of an existing broadcasting network, the spare optical fiber and in-use optical fibers are made to be used as an input optical fiber together to work normally, and signals are output to each user group through the multi-channel optical fiber automatic backup device. The multi-channel optical fiber automatic backup device comprises N optical fiber output ports, N optical switches, N+1 optical fiber input ports, N+1 optical splitters, an optical power monitoring unit, a microcontroller, a network management interface and a multi-channel optical change-over switch. The microcontroller performs fault judgment according to optical power of each optical fiber, wherein the optical power is monitored by the optical power monitoring unit; the N optical switches and the one multi-channel optical change-over switch are controlled, and therefore the spare optical fiber is used for replacing the faulted in-use optical fiber. The multi-channel optical fiber automatic backup device has the advantages of solving the problem of automatic detection of the optical fibers, having an optical fiber fault protection function, and being small in existing optical fiber network transformation and low in cost.
Description
Technical field
The present invention relates to optical communication field, CATV Field and broadcast communication field, particularly relate to a kind of automatic backup device of the multi-channel optical fibre for radio network.
Background technology
Along with the deepening constantly of integration of three networks process, China's cable TV network has been obtained development at full speed in recent years.(optical fiber is fibre-optic writing a Chinese character in simplified form to optical fiber, a kind of medium of the light signal transduction that utilizes the total reflection principle of light in the fiber that glass or plastics are made and reach) communication have message capacity large, transmit the characteristics such as signal quality is high, long transmission distance, now become a kind of main communication mode, also be widely applied in the cable TV industry.
At present, nearly all TV in CATV network company is all carrying out large-scale optical cable to cable TV network (optical cable is that the optical fiber of some forms the cable heart according to certain way progressively, be surrounded by sheath outward, in order to realize a kind of communication line of optical signal transmission) transformation.The cable TV main business is unidirectional television broadcasting, initial framework as shown in Figure 1, by machine room directly send multifiber (be actually optical cable, in the present invention in order to express easily, in the situation that do not produce ambiguity, the unified optical fiber that is expressed as) to different customer groups.
Along with the user is more and more, network size is increasing, the distance that signal demand transmits is more and more far away, in order to ensure signal quality, (image intensifer is can be under the condition that keeps the light signal feature invariant to high-power image intensifer for needs, do not need through light-to-current inversion and electro-optical conversion, increase the active equipment of optical signal power) the enhancing light signal strength, framework changes into as shown in Figure 2 thus, but high-power optical amplifier arrangement is not only expensive, once and the customer volume affected after fault very large.
In order to address this problem, the framework of the radio network that current China TV in CATV network company is commonly used as shown in Figure 3, pass through optical branching device, recycle a plurality of normal optical amplifiers and replace a high power amplifier, can effectively reduce cost, and the break down customer volume of rear impact of some normal optical amplifiers is relatively little a lot.
But this framework also just reduces the influence surface after individual equipment produces fault as much as possible, can not when fault, make prompting, can not after fault, automatically repair.
Summary of the invention
In view of the above problems, the invention provides a kind of reasonable in design, reliability is high, the economic automatic backup device of the multi-channel optical fibre for radio network of easily promoting, not only solved the optical fiber real-time monitoring problem in the broadcast communication field, and when breaking down, optical fiber can automatically switch to standby optical fiber, the impact that perfect solution fiber failure brings the user.
Technical scheme provided by the invention is as follows: increase a standby optical fiber on the framework of existing radio network, make standby optical fiber and working as input optical fibre together with optical fiber, signal outputs to each customer group again by the multi-channel optical fibre automatic backup device.
The described automatic backup device of the multi-channel optical fibre for radio network comprises: N fiber-optic output mouth, a N optical switch, a N+1 optic fibre input end mouth, a N+1 optical splitter, and light power monitoring measuring unit, microcontroller (MCU) are as main control module, network management interface and multi-path light diverter switch.N is natural number.
Described multi-channel optical fibre automatic backup device inside, each input optical fibre all connects an optical splitter, and each is with optical fiber, from optical splitter, a light signal part out outputs to light power monitoring measuring unit, and another part outputs to the first via input of an optical switch; From optical splitter, a light signal part out outputs to light power monitoring measuring unit to standby optical fiber, and another part outputs to the multi-path light diverter switch; Each road of described multi-path light diverter switch is connected respectively to the second tunnel input of an optical switch; Each optical switch outputs to each customer group; Light power monitoring measuring unit is connected with microcontroller; The output of described microcontroller connects respectively a described N optical switch and multi-path light diverter switch; Described microcontroller carries out fault verification according to the luminous power of each optical fiber of light power monitoring measuring unit monitoring, controls N optical switch and multi-path light diverter switch, thereby standby optical fiber replacement fault used to optical fiber; Microcontroller also upwards is connected with network management interface by communication module.
The optical splitter splitting ratio is 99:1 normally, and the light signal of 1% branch road part is linked into light power monitoring measuring unit; The light signal of 99% main road part, each is being linked into an optical switch with optical fiber, and each standby optical fiber is linked into a multi-path light diverter switch.
Described light power monitoring measuring unit is comprised of a plurality of light detecting devices, a plurality of input/output port.The major function of light power monitoring measuring unit is to judge the operating state of every optical fiber by the luminous power of every optical fiber of Real-Time Monitoring.
The major function of described microcontroller is to judge whether cut-in stand-by optical fiber by the fault verification algorithm, control each optical switch and multi-path light diverter switch downwards, upwards the connection network interface tube is realized the optical fiber network management report, receives webmaster switches light switch and the instruction that running parameter is set.
Described multi-path light diverter switch is " N selects 1 multi-path light diverter switch " that can carry out the multi-channel optical fibre switching that receives micro-controller instructions.
Described optical switch is " 2 select 1 optical switch " that receives the instruction of microcontroller.
Advantage of the present invention is: the present invention has not only solved the problem that optical fiber detects automatically, but also the function of fiber failure protection is provided.Really accomplished to make prompting when fault, automatically repaired after fault.And the present invention is less to the transformation of existing fiber optic network, required cost and cost are also lower, are that a kind of stability is high, easy care, the automatic backup device of the multi-channel optical fibre for radio network easily promoted.
The accompanying drawing explanation
Fig. 1 is initial fiber optic network configuration diagram.
Fig. 2 is the expansion configuration diagram of having added high-power image intensifer and optical branching device.
Fig. 3 is the expansion configuration diagram that has adopted a plurality of normal optical amplifiers.
Fig. 4 is the configuration diagram that has adopted the multi-channel optical fibre automatic backup device of the present invention's proposition.
Fig. 5 is the internal structure schematic diagram of the multi-channel optical fibre automatic backup device that proposes of the present invention.
Fig. 6 is the internal structure schematic diagram of microcontroller.
Fig. 7 is the schematic diagram that the multi-channel optical fibre automatic backup device is switched to the operating state of standby optical fiber.
Embodiment
Further illustrate specific embodiments of the invention and operation principle below in conjunction with accompanying drawing.
In order to express easily, with 3, at use optical fiber (3 customer groups), 1 standby optical fiber, " 3+1 pattern " is example.In fact, according to the demand of most TV in CATV network company, normally " 11+1 pattern ".Future situation more complicated, require higher optical fiber radio network, can expand to " N+M pattern ", N is main road quantity, M be that N, M are natural number for the way amount.
The framework of a kind of automatic backup device of the multi-channel optical fibre for radio network that has adopted the present invention to propose, as shown in Figure 4, article 3, with optical fiber (optical fiber A, optical fiber A, optical fiber C) and 1 standby optical fiber (optical fiber D), all working, signal outputs to customer group A, B, C again by the multi-channel optical fibre automatic backup device.
As shown in Figure 5, the described automatic backup device of the multi-channel optical fibre for radio network inside comprises: 4 optical splitters (optical splitter A, optical splitter B, optical splitter C, optical splitter D), 1 light power monitoring measuring unit, 1 microcontroller, network management interface, 3 optical switches (optical switch A, optical switch B, optical switch C), 1 multi-path light diverter switch.Described 4 light signals input is respectively by 4 optical splitters, part optical signals outputs to light power monitoring measuring unit, part optical signals outputs to respectively 3 optical switches and 1 multi-path light diverter switch, wherein at the light signal with optical fiber, output to optical switch, the light signal of standby optical fiber outputs to the multi-path light diverter switch.Light power monitoring measuring unit is connected with microcontroller, and the microcontroller other end is connected with 1 multi-path light diverter switch with above-mentioned 3 optical switches, and above-mentioned 3 optical switches output to customer group A, B, C.Microcontroller also upwards is connected with network management interface by communication module, realizes network management function.
Described optical splitter adopts the splitting ratio of 99:1, and wherein the light signal of 1% branch road part is linked into light power monitoring measuring unit, and the light signal of 99% main road part outputs to described 3 optical switches and 1 multi-path light diverter switch.
Described light power monitoring measuring unit is comprised of 4 light detecting devices and input/output port.The luminous power of every input optical fibre of light power monitoring measuring unit Real-Time Monitoring, and Monitoring Data is reported to microcontroller.
As shown in Figure 6, described microcontroller arranges module, optical switch control module and input/output port by control module, communication module, luminous power receiver module, fiber failure judge module, running parameter and forms.Described microcontroller, by analyzing the luminous power working condition of 4 input optical fibres, has judged whether by the fault verification algorithm whether which bar optical fiber breaks down, need to be switched to standby optical fiber; Control 3 optical switches and 1 multi-path light diverter switch downwards; Upwards by network management interface, report optical fiber to report to the police; And can oppositely receive the instruction of network management system switches light switch, after being mainly used in manually repairing fiber failure, by network management system standby optical fiber be switched to former mode of operation with optical fiber; Can also receive the instruction that network management system arranges running parameter, while being mainly used in some constantly unstable or construction of light signal, adjust running parameter, reduce that invalid optical fiber is reported to the police and optical fiber switches.
Consider the complexity of fiber optic network and the randomness that luminous power is shaken may occur, therefore in the judgement fiber failure, be not to be judged to be immediately fiber failure when luminous power is reduced to the low alarm setting threshold values, multi-path light diverter switch and optical switch immediately automatically switch.The fault verification algorithm of microcontroller can effectively avoid invalid optical fiber to report to the police and the optical fiber switching.
Fault verification algorithm one: once find that luminous power is reduced under the lower limit threshold values, continue sampling one end time T, if in the T time period all under the lower limit threshold values, judge fiber failure.
Fault verification algorithm two: in the regular hour section, if find that luminous power is in the shake back and forth up and down of lower limit threshold values, frequency surpasses F, judges fiber failure.And microcontroller can receive the instruction that network management system is revised luminous power low alarm setting threshold values, continued the running parameters such as sampling time T and chattering frequency F, concrete parameter value can be set flexibly according to the real network situation.Add the fault verification algorithm, can significantly improve performance and the stability of system.
Described multi-path light diverter switch is " N selects 1 multi-path light diverter switch " that can carry out the multi-channel optical fibre switching that receives micro-controller instructions.Described optical switch is " 2 select 1 optical switch " that receives the instruction of microcontroller.It is that they are ripe and relatively cheap light shutter device that the present invention selects the reason of " N selects 1 optical switch " and " 2 select 1 optical switch ", significant to cost control and the stability of a system.
Under normal mode of operation as shown in Figure 5, input A, B, C are in the input with optical fiber, by a1, b1, the c1 end of optical switch A, B, C, are connected to output A, B, C respectively.Input D is the input of standby optical fiber, and multi-path light diverter switch acquiescence switches in the d0 end.After received optical power monitoring and fault verification, find input A fault when microcontroller, optical switch A automatically switches to the a2 end, and the multi-path light diverter switch automatically switches to the d1 end simultaneously.As shown in Figure 7, now, the d1 end of input D by the multi-path light diverter switch, be connected to output A, with optical fiber A, becoming fault optical fiber, and standby optical fiber D becomes and using optical fiber.After the fault restoration of optical fiber A, network management system can send the instruction of switches light switch to microcontroller by network management interface, now, recover normal mode of operation, input A is connected to output A by the a1 end of optical switch A, and multi-path light diverter switch acquiescence switches in the d0 end.
More than can find out, the present invention has following characteristics:
1) each operating state at use optical fiber of Real-Time Monitoring, possess self-monitoring function.
2) when when breaking down with optical fiber, automatically switching to standby optical fiber, guarantee the normal operation of fiber optic network, possess self-recovering function.
3) upwards report network management system simultaneously, trigger network management report.
4) introduce the fiber failure decision algorithm, significantly improve performance and the stability of system.
5) can receive the instruction of the switches light switch of network management system, initiatively the diverter switch test macro.
6) low to existing fiber optic network improvement cost, stability is high, easy care.
Claims (5)
1. for the multi-channel optical fibre automatic backup device of radio network, it is characterized in that, comprise: N fiber-optic output mouth, a N optical switch, a N+1 optic fibre input end mouth, a N+1 optical splitter, and light power monitoring measuring unit, microcontroller, network management interface and multi-path light diverter switch; Each input optical fibre all connects an optical splitter, described input optical fibre is included in optical fiber and standby optical fiber, each is with optical fiber, from optical splitter, a light signal part out outputs to light power monitoring measuring unit, and another part outputs to the first via input of an optical switch; From optical splitter, a light signal part out outputs to light power monitoring measuring unit to standby optical fiber, and another part outputs to the multi-path light diverter switch; Each road of described multi-path light diverter switch is connected respectively to the second tunnel input of an optical switch; Each optical switch outputs to each customer group; Light power monitoring measuring unit is connected with microcontroller; The output of described microcontroller connects respectively a described N optical switch and multi-path light diverter switch; Described microcontroller carries out fault verification according to the luminous power of each optical fiber of light power monitoring measuring unit monitoring, controls N optical switch and 1 multi-path light diverter switch, thereby standby optical fiber replacement fault used to optical fiber; Microcontroller also is connected with network management interface by communication module.
2. the automatic backup device of the multi-channel optical fibre for radio network according to claim 1, it is characterized in that: a described N+1 optical splitter all adopts the splitting ratio of 99:1, each optical splitter of the process wherein light signal of 1% branch road part is linked into described light power monitoring measuring unit, and the light signal of 99% main road part outputs to a described N optical switch or multi-path light diverter switch.
3. the automatic backup device of the multi-channel optical fibre for radio network according to claim 1, it is characterized in that: described light power monitoring measuring unit is comprised of a plurality of light detecting devices and a plurality of input/output port.
4. the automatic backup device of the multi-channel optical fibre for radio network according to claim 1 is characterized in that: described multi-path light diverter switch is to receive " N selects 1 multi-path light diverter switch " that micro-controller instructions carries out the multi-channel optical fibre switching.
5. the automatic backup device of the multi-channel optical fibre for radio network according to claim 1 is characterized in that: described optical switch is " 2 select 1 optical switch " that receives the instruction of microcontroller.
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Cited By (6)
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| CN103825650A (en) * | 2014-02-28 | 2014-05-28 | 北京锐锋钝石科技有限公司 | System and method for monitoring optical fibers |
| CN105553547A (en) * | 2015-12-16 | 2016-05-04 | 国网福建省电力有限公司 | Monitoring system of standby optical power cable |
| CN105915280A (en) * | 2016-07-05 | 2016-08-31 | 中国电子科技集团公司第三十四研究所 | Simulation signal optical fiber communication system with hot backup and use method thereof |
| WO2017067368A1 (en) * | 2015-10-23 | 2017-04-27 | Huawei Technologies Co., Ltd. | Control apparatus and methods in photonics applications |
| CN109150295A (en) * | 2018-07-03 | 2019-01-04 | 深圳市中科新业信息科技发展有限公司 | A kind of measuring system and measuring device |
| CN112054843A (en) * | 2020-08-21 | 2020-12-08 | 武汉光迅信息技术有限公司 | Optical signal transmission system and method |
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Patent Citations (4)
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| WO2010083102A1 (en) * | 2009-01-16 | 2010-07-22 | Cisco Technology. Inc. | Sparing for multi-wavelength optical transmitter |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103825650A (en) * | 2014-02-28 | 2014-05-28 | 北京锐锋钝石科技有限公司 | System and method for monitoring optical fibers |
| WO2017067368A1 (en) * | 2015-10-23 | 2017-04-27 | Huawei Technologies Co., Ltd. | Control apparatus and methods in photonics applications |
| CN105553547A (en) * | 2015-12-16 | 2016-05-04 | 国网福建省电力有限公司 | Monitoring system of standby optical power cable |
| CN105915280A (en) * | 2016-07-05 | 2016-08-31 | 中国电子科技集团公司第三十四研究所 | Simulation signal optical fiber communication system with hot backup and use method thereof |
| CN109150295A (en) * | 2018-07-03 | 2019-01-04 | 深圳市中科新业信息科技发展有限公司 | A kind of measuring system and measuring device |
| CN112054843A (en) * | 2020-08-21 | 2020-12-08 | 武汉光迅信息技术有限公司 | Optical signal transmission system and method |
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