CN104378153A - PON backbone line protection device and method - Google Patents
PON backbone line protection device and method Download PDFInfo
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- CN104378153A CN104378153A CN201410648403.7A CN201410648403A CN104378153A CN 104378153 A CN104378153 A CN 104378153A CN 201410648403 A CN201410648403 A CN 201410648403A CN 104378153 A CN104378153 A CN 104378153A
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- pon
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- backhaul
- circulator
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Abstract
The invention discloses a PON backbone line protection device which comprises a PON protection local side device and a PON protection shunt. The PON protection local side device is connected with an OLT device and used for monitoring the state of a main line and the state of a spare line and controlling selection of the main line or the spare line; the PON protection shunt is connected with the PON protection local side device and ONU devices and used for equally dividing PON signals; the PON protection local side device comprises an optical switch, a filter connected with the optical switch, a circulator connected with the filter, a laser device and a detector, and the laser device and detector are connected with the circulator; the PON protection shunt is provided with a reflection membrane used for reflecting monitoring light. Automatic switchover protection of the main line and the spare line of a PON line is achieved through the PON backbone line protection device; when a main optical fiber is disconnected because of a fault, the PON protection local side device can be automatically switched to the spare line, and it is guaranteed that the PON line can normally work.
Description
Technical field
The invention belongs to electrical communication technology design field, particularly relate to one and can be used for PON backhaul protective device and guard method.
Background technology
Along with the enforcement of light entering and copper back and the construction of FTTX network, increasing telecommunication service at present implements carrying by PON.The speed realized due to PON is more and more faster, and any node of PON system lost efficacy, and all can cause large-area service disconnection, this situation for that high reliability request user be unacceptable.Therefore, implement protection to PON, just seeming particularly important with the stable carrying realizing PON, how more effectively to protect the network of PON, is face major issue of EPON and GPON networking from now on.Now commercially, a kind of low cost, the PON backhaul protective device of high reliability and guard method is needed badly.
Summary of the invention
The object of the invention is the problem in order to solve the protection of PON backhaul; according to prior art defect; the invention provides a kind of PON backhaul protective device, achieve primary, the extension wire automatic switching protection of PON circuit, ensure that PON circuit can normally work.
The PON backhaul protective device that the present invention proposes, comprising: PON protects local side apparatus and PON to protect splitter; Wherein, described PON protects local side apparatus to be connected with OLT device, for monitoring the state of primary circuit and extension wire, and controls the selection of primary circuit or extension wire; Described PON protects splitter to protect local side apparatus and ONU equipment to be connected with described PON respectively, for dividing equally PON signal; Described PON protects local side apparatus to comprise: optical switch, the filter be connected with described optical switch, the circulator be connected with described filter, the laser be connected with described circulator and detector; Wherein, described optical switch is connected with described OLT device, switches described primary circuit or described extension wire for controlling; Described laser for generation of monitor optical, and is sent in described circulator; Described circulator is used for described monitor optical to be sent in described filter, and is sent in described detector by the light signal that described filter is separated; Described detector is used for the luminous power of light signal in detection line; Described PON protects on splitter and is provided with reflection diaphragm, for reflecting described monitor optical.
In the PON backhaul protective device that the present invention proposes, described PON protects local side apparatus and described PON to protect between splitter and is connected with at least two optical fiber.
In the PON backhaul protective device that the present invention proposes, described monitor optical is the light signal of 1610nm.
In the PON backhaul protective device that the present invention proposes, described circulator replaces with optical coupler.
In the PON backhaul protective device that the present invention proposes, described optical switch is locking optical switch, continues the route choosing state before keeping power-off after power-off.
In the PON backhaul protective device that the present invention proposes, described optical switch manual switchover circuit or according to described luminous power automatic switching line.
In the PON backhaul protective device that the present invention proposes, described PON protects splitter to be passive optical splitter.
In the PON backhaul protective device that the present invention proposes, it is connected by primary and backup circuit optical fiber that described PON protects local side apparatus and described PON to protect between splitter.
Preferably, described PON protects local side apparatus to comprise three SC optical interfaces, and one of them connects OLT local side apparatus, and one connects primary fibre circuit, and one connects spare fibre circuit.
The invention allows for the guard method of a kind of PON backhaul, comprise the following steps:
Step one: laser generates monitor optical, and by circulator and filter by multiplexing for described monitor optical in PON line downstream signal;
Step 2: described PON protects the reflection diaphragm on splitter that the described monitor optical in described downstream signal is reflected back described filter;
Step 3: the described monitor optical reflected is separated with upward signal with described circulator by described filter, and is sent in detector by described monitor optical;
Step 4: described monitor optical is converted into luminous power by described detector;
Step 5: when described luminous power is lower than the threshold value set, optical switch circuit switched.
The device and method of the PON backhaul protection that the present invention proposes has following beneficial effect:
1. present invention achieves the protection of the primary circuit of PON and extension wire, be switched to extension wire fast when primary circuit disconnects; Be switched to primary circuit fast when extension wire disconnects, ensure that customer service can not be interrupted;
2. the present invention realizes the transparent transmission of PON signal, can be applied in the various PON system such as EPON and GPON circuit, can not have an impact to customer service;
3. the present invention is when device looses power, still can keep the line status before device looses power, can not have an impact to line activities;
4. the present invention is when realizing PON backhaul defencive function, and OLT device, ONU equipment state have nothing to do, and connect, also can realize the function of active and standby road route protection even without ONU user.
Accompanying drawing explanation
Fig. 1 is the structural representation of PON backhaul protective device of the present invention.
Fig. 2 is the flow chart of PON backhaul of the present invention guard method.
Fig. 3 is the structural representation that in embodiment, PON protects local side apparatus.
Fig. 4 is the structural representation that in embodiment, PON protects splitter.
Embodiment
In conjunction with following specific embodiments and the drawings, the invention will be described in further detail.Implement process of the present invention, condition, experimental technique etc., except the following content mentioned specially, be universal knowledege and the common practise of this area, the present invention is not particularly limited content.
In Fig. 1 to Fig. 4,1-PON protects local side apparatus, 11-optical switch, 12-filter, 13-circulator, 14-laser, 15-detector, and 2-PON protects splitter, 21-reflection diaphragm, 3-OLT equipment, 4-ONU equipment.
The present invention proposes a kind of PON backhaul protective device, comprising: PON protects local side apparatus 1 and PON to protect splitter 2.Wherein, PON protects local side apparatus 1 to be connected with OLT device 3, for monitoring the state of primary circuit and extension wire, and controls the selection of primary circuit or extension wire.PON protects splitter 2 to protect local side apparatus 1 and ONU equipment 4 to be connected, for dividing equally PON signal respectively with PON.
In the PON backhaul protective device that the present invention proposes, PON protects local side apparatus 1 to comprise: optical switch 11, the filter 12 be connected with optical switch 11, the circulator 13 be connected with filter 12, the laser 14 be connected with circulator 13 and detector 15.Wherein, optical switch 11 is connected with OLT device 3, switches primary circuit or extension wire for controlling.Laser 14 for generation of monitor optical, and is sent in circulator 13.The light signal that filter 13 is separated for monitor optical being sent in filter 12, and is sent in detector 15 by circulator 13.Detector 15 is for the luminous power of light signal in detection line.PON protects on splitter 2 and is provided with reflection diaphragm 21, for reflecting monitor optical.
In the PON backhaul protective device that the present invention proposes, PON protects local side apparatus 1 and PON to protect between splitter 2 and is connected with at least two optical fiber.
In the PON backhaul protective device that the present invention proposes, monitor optical is the light signal of 1610nm, 1550nm, 1490nm or 1310nm.
In the PON backhaul protective device that the present invention proposes, circulator 13 replaces with optical coupler.
In the PON backhaul protective device that the present invention proposes, optical switch 11 is locking optical switch, continues the route choosing state before keeping power-off after power-off.
In the PON backhaul protective device that the present invention proposes, optical switch 11 manual switchover circuit or according to luminous power automatic switching line.
In the PON backhaul protective device that the present invention proposes, PON protects splitter 2 to be passive optical splitter.
The PON protective device that the present invention proposes and method can be applicable to, in EPON, GPON circuit, also can be applicable to all PON such as 10G EPON, XGPON, WDM-PON.
In the present invention, laser 14, circulator 13 between detector 15 and filter 12 three, is adopted to connect, the light that laser 14 sends only can be transferred to filter 12 after circulator 13, and detector 15 can not be transferred to, and the 1610nm light signal filtered out from filter 12 is after circulator 13, only can be transferred to detector 15, and laser 14 can not be transferred to.
The invention allows for the method for a kind of PON backhaul protection, comprise the following steps:
Step one: laser 14 generates monitor optical, and by circulator 13 and filter 12 by multiplexing for monitor optical in PON line downstream signal;
Step 2: PON protects the reflection diaphragm 21 on splitter 2 that the monitor optical in downstream signal is reflected back filter 12;
Step 3: the monitor optical reflected is separated with upward signal with circulator 13 by filter 12, and monitor optical is sent in detector 15;
Step 4: monitor optical is converted into luminous power by detector 15;
Step 5: when luminous power is lower than the threshold value set, optical switch 11 circuit switched.
Embodiment
PON backhaul protective device in the present embodiment, comprising: PON protects local side apparatus 1 and PON to protect splitter 2.Wherein, PON protects local side apparatus 1 to be connected with OLT device 3, for monitoring the state of primary circuit and extension wire, and controls the selection of primary circuit or extension wire.PON protects splitter 2 to protect local side apparatus 1 and ONU equipment 4 to be connected respectively with PON, realizes PON downstream signal N road and divides equally and divide equally with the active and standby two-way of upward signal.
In the present embodiment PON backhaul protective device, PON protects local side apparatus 1 to comprise: optical switch 11, the filter 12 be connected with optical switch 11, the circulator 13 be connected with filter 12, the laser 14 be connected with circulator 13 and detector 15.Wherein, optical switch 11 is connected with OLT device 3, switches primary circuit or extension wire for controlling.Laser 14 for generation of monitor optical, and is sent in circulator 13.The light signal that filter 13 is separated for monitor optical being sent in filter 12, and is sent in detector 15 by circulator 13.Detector 15 is for the luminous power of light signal in detection line.PON protects on splitter 2 and is provided with reflection diaphragm 21, for reflecting monitor optical.
In the present embodiment, laser 14 sends the monitor optical of 1610nm, and is multiplexed in PON circuit by circulator 13 and 1610nm filter 12, is transferred to 2xN splitter by main road and spare fibre; PON protects splitter two uplink ports with reflection diaphragm 21, and the 1610nm monitor optical of down direction is transmitted toward up direction after reflection diaphragm 21 reflects.The reverberation of up direction 1610nm, after protecting the 1610nm filter 12 of local side apparatus 1 and circulator 13, after being linked into PIN detector 15, is converted into luminous power through opto-electronic conversion by PON.The 1610nm luminous power of primary and backup circuit analyzed by detector 15, and compares with the threshold value pre-set, and when received optical power is greater than threshold value, represents that this circuit is normal, when received optical power is less than threshold value, represents that this circuit disconnects.
In the present embodiment PON backhaul protective device, optical switch 11 has automatic operation mode, according to the state variation of primary and backup circuit, realizes active and standby road fast and automatically switches.When primary circuit disconnection extension wire is normal, be switched to extension wire fast.When extension wire disconnect primary circuit normal time, be switched to primary circuit fast.Meanwhile, optical switch also has manual operation function, realizes primary, extension wire switching by button or order.
In the present embodiment, PON protects splitter 2 to adopt 2xN splitter, and 2xN splitter is connected to N number of ONU equipment.Optical switch 11 adopts 1x2 optical switch.
In the present embodiment, when primary or spare fibre disconnects, the monitor optical signal of 1610nm just no longer reflects, and the 1610nm utilizing emitted light power change that PON protects local side apparatus to detect can weaken greatly, thus judges that this optical fiber disconnects.According to the state of primary and backup optical fiber, fast controls 1x2 optical switch switches, and when main road optical fiber disconnects, is switched to standby road fast, when for the disconnection of road optical fiber, is switched to main road fast, thus realizes the function that PON backhaul protects automatically.
In the present embodiment; PON protects the 1x2 optical switch of local side apparatus 1 to adopt locking-typed optical switch, when the device is powered off, can keep the optical path states before device powers down; service disconnection can not be caused because of the power-off of PON backhaul proterctive equipment, ensure the reliability of system.
In the present embodiment, PON system descending employing 1490nm light signal, up employing 1310nm light signal, and PON backhaul protective device uses the monitor optical of 1610nm, can not produce any interference to PON business.Monitor optical can select other wavelength except 1310nm, 1490nm and 1550nm, as long as original service wavelength is conflicted mutually in discord PON system.
The present embodiment selects 1610nm as monitoring light source, so reflection diaphragm 21 also selects 1610nm wavelength, can the light of 1610nm wavelength in reflected P ON circuit, and interference can not be produced to PON signal.
In the present embodiment; PON backhaul protective device only has local side apparatus to need power supply; splitter side does not need power supply; because PON is passive optical network; OLT device and ONU equipment is only had just to need power supply; middle optical fiber transmission line and optical splitter do not have power supply, and other PON backhaul proterctive equipment existing faces powerup issue usually, and PON backhaul protective device of the present invention well solves this defect.
The device and method of PON backhaul protection of the present invention, has nothing to do with terminal OLT device and ONU equipment, and even without connection OLT device and ONU equipment, the device of PON backhaul protection of the present invention also can normally work.And other PON backhaul protected mode existing relies on the up luminescence of ONU equipment usually; the 1310nm luminous power detecting ONU equipment transmission according to local side apparatus detects main road and realizes switching for route line state; just cannot detect active and standby route line state when not having ONU equipment to connect, also just cannot realize automatic protection switching feature.If fiber failure now occurs again disconnect, OLT with ONU just cannot shake hands and be connected, and ONU equipment can not send 1310nm light before not shaking hands, and now system cannot normally work.PON backhaul protective device of the present invention and method solve this defect.
Protection content of the present invention is not limited to above embodiment.Under the spirit and scope not deviating from inventive concept, the change that those skilled in the art can expect and advantage are all included in the present invention, and are protection range with appending claims.
Claims (8)
1. a PON backhaul protective device, is characterized in that, comprising: PON protects local side apparatus (1) and PON to protect splitter (2); Wherein, described PON protects local side apparatus (1) to be connected with OLT device (3), for monitoring the state of primary circuit and extension wire, and controls to switch described primary circuit or described extension wire; Described PON protects splitter (2) to protect local side apparatus (1) and ONU equipment (4) to be connected, for dividing equally PON signal respectively with described PON;
Described PON protects local side apparatus (1) to comprise: optical switch (11), the filter (12) be connected with described optical switch (11), the circulator (13) be connected with described filter (12), the laser (14) be connected with described circulator (13) and detector (15); Wherein, described optical switch (11) is connected with described OLT device (3), switches described primary circuit or described extension wire for controlling; Described laser (14) for generation of monitor optical, and is sent in described circulator (13); The light signal that described filter (13) is separated for described monitor optical being sent in described filter (12), and is sent in described detector (15) by described circulator (13); Described detector (15) is for the luminous power of light signal in detection line;
Described PON protects on splitter (2) and is provided with reflection diaphragm (21), for reflecting described monitor optical.
2. PON backhaul protective device as claimed in claim 1, is characterized in that, described PON protects local side apparatus (1) and described PON to protect between splitter (2) and is connected with at least two optical fiber.
3. PON backhaul protective device as claimed in claim 1, it is characterized in that, described monitor optical is the light signal of 1610nm.
4. PON backhaul protective device as claimed in claim 1, it is characterized in that, described circulator (13) replaces with optical coupler.
5. PON backhaul protective device as claimed in claim 1, it is characterized in that, described optical switch (11) is locking optical switch, continues the route choosing state before keeping power-off after power-off.
6. PON backhaul protective device as claimed in claim 1, is characterized in that, described optical switch (11) manual switchover circuit or according to described luminous power automatic switching line.
7. PON backhaul protective device as claimed in claim 1, is characterized in that, described PON protects splitter (2) to be passive optical splitter.
8. a PON backhaul guard method for PON backhaul protective device as claimed in claim 1, is characterized in that, comprise the following steps:
Step one: laser (14) generates monitor optical, and by circulator (13) and filter (12) by multiplexing for described monitor optical in PON line downstream signal;
Step 2: described PON protects the reflection diaphragm (21) on splitter (2) that the described monitor optical in described downstream signal is reflected back described filter (12);
Step 3: the described monitor optical reflected is separated with upward signal with described circulator (13) by described filter (12), and described monitor optical is sent in detector (15);
Step 4: described monitor optical is converted into luminous power by described detector (15);
Step 5: when described luminous power is lower than the threshold value set, optical switch (11) circuit switched.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410648403.7A CN104378153A (en) | 2014-11-14 | 2014-11-14 | PON backbone line protection device and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410648403.7A CN104378153A (en) | 2014-11-14 | 2014-11-14 | PON backbone line protection device and method |
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| CN104378153A true CN104378153A (en) | 2015-02-25 |
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| CN201410648403.7A Pending CN104378153A (en) | 2014-11-14 | 2014-11-14 | PON backbone line protection device and method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105472325A (en) * | 2015-11-20 | 2016-04-06 | 武汉微创光电股份有限公司 | Method for dual protection during network video monitoring |
| CN108055082A (en) * | 2017-11-14 | 2018-05-18 | 烽火通信科技股份有限公司 | A kind of single-fiber bidirectional optical line system based on C-RAN systems |
| WO2020186388A1 (en) * | 2019-03-15 | 2020-09-24 | 华为技术有限公司 | Light-emitting assembly, optical module, and optical line terminal |
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| CN201426118Y (en) * | 2009-03-20 | 2010-03-17 | 浙江工业大学 | Protective device for backbone optical fiber link of passive optical network |
| CN102201861A (en) * | 2010-03-24 | 2011-09-28 | 中兴通讯股份有限公司 | Fault detection system and method based on long-distance passive optical network |
| CN102412896A (en) * | 2011-11-28 | 2012-04-11 | 武汉光迅科技股份有限公司 | Optical line protection system for realizing single-end monitoring |
| CN104009799A (en) * | 2013-02-25 | 2014-08-27 | 江宏祥 | Optical bypass switch module and online equipment matched with same |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US20040213564A1 (en) * | 2000-03-04 | 2004-10-28 | Shinji Sakano | Optical network |
| CN201426118Y (en) * | 2009-03-20 | 2010-03-17 | 浙江工业大学 | Protective device for backbone optical fiber link of passive optical network |
| CN102201861A (en) * | 2010-03-24 | 2011-09-28 | 中兴通讯股份有限公司 | Fault detection system and method based on long-distance passive optical network |
| CN102412896A (en) * | 2011-11-28 | 2012-04-11 | 武汉光迅科技股份有限公司 | Optical line protection system for realizing single-end monitoring |
| CN104009799A (en) * | 2013-02-25 | 2014-08-27 | 江宏祥 | Optical bypass switch module and online equipment matched with same |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105472325A (en) * | 2015-11-20 | 2016-04-06 | 武汉微创光电股份有限公司 | Method for dual protection during network video monitoring |
| CN108055082A (en) * | 2017-11-14 | 2018-05-18 | 烽火通信科技股份有限公司 | A kind of single-fiber bidirectional optical line system based on C-RAN systems |
| WO2020186388A1 (en) * | 2019-03-15 | 2020-09-24 | 华为技术有限公司 | Light-emitting assembly, optical module, and optical line terminal |
| CN113574432A (en) * | 2019-03-15 | 2021-10-29 | 华为技术有限公司 | Light emission assembly, optical module and optical line terminal |
| CN113574432B (en) * | 2019-03-15 | 2022-12-27 | 华为技术有限公司 | Light emission assembly, optical module and optical line terminal |
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Application publication date: 20150225 |