CN102684780A - Optical network protecting method and optical fiber line switching equipment - Google Patents
Optical network protecting method and optical fiber line switching equipment Download PDFInfo
- Publication number
- CN102684780A CN102684780A CN2012100452194A CN201210045219A CN102684780A CN 102684780 A CN102684780 A CN 102684780A CN 2012100452194 A CN2012100452194 A CN 2012100452194A CN 201210045219 A CN201210045219 A CN 201210045219A CN 102684780 A CN102684780 A CN 102684780A
- Authority
- CN
- China
- Prior art keywords
- optical fiber
- fiber link
- circuit switching
- switching device
- fibre circuit
- 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.)
- Granted
Links
- 239000013307 optical fiber Substances 0.000 title claims abstract description 168
- 230000003287 optical effect Effects 0.000 title claims abstract description 100
- 238000000034 method Methods 0.000 title claims abstract description 40
- 239000000835 fiber Substances 0.000 claims abstract description 162
- 238000004891 communication Methods 0.000 claims abstract description 126
- 238000011084 recovery Methods 0.000 claims abstract description 18
- 230000005540 biological transmission Effects 0.000 claims description 28
- 230000009977 dual effect Effects 0.000 claims description 14
- 238000012544 monitoring process Methods 0.000 claims description 14
- 230000008569 process Effects 0.000 claims description 10
- 239000004973 liquid crystal related substance Substances 0.000 claims description 4
- 239000004606 Fillers/Extenders Substances 0.000 claims description 3
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 230000000875 corresponding effect Effects 0.000 description 6
- 239000012467 final product Substances 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000006855 networking Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 238000005314 correlation function Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Landscapes
- Optical Communication System (AREA)
Abstract
The invention provides a protecting method for a passive optical network and optical fiber line switching equipment. According to the embodiment of the invention, the optical fiber line switching equipment is connected with two optical communication ports of far-end communication equipment by different optical fiber link circuits; and when a certain branch working optical fiber link circuit connected with the far-end communication equipment goes wrong, the optical fiber line switching equipment is connected with a standby branch optical fiber link circuit to ensure the timely recovery of the communication. Simultaneously, compared with the prior art, the invention has the advantages that the optical fiber line switching equipment is connected with the two optical communication ports of the far-end communication equipment by the optical fiber link circuits of different routes and one of the two optical communication ports is selected to carry out communication as required, so that the optical fiber line protection capacity of the passive optical network is greatly improved and the protecting method and the optical fiber line switching equipment are beneficial for popularizing and applying the FTTH/B (Fiber To The Home/B).
Description
Technical field
The present invention relates to a kind of optical communication technique field, is a kind of guard method and optical link switch device that relates to EPON specifically.
Background technology
Optical-fiber network is the most general a kind of networking mode that present signal post adopts, because optical fiber has advantages such as transmission frequency bandwidth, capacity is big, loss is low, antijamming capability is strong, as the indispensable means of a kind of communication network.
But in optical network line is in the past built; General fiber cable cross connection box place out of doors; Only be to connecting through optical patchcord, or directly carry out welding via the optical fiber in the optical cable of different routes, and for the protection problem of fibre circuit; Generally be finally to arrive the switching of carrying out circuit behind the communications equipment room again by different lightguide cable links, fiber cable cross connection box is present in the optical-fiber network as a passive system.
And the progressively expansion of building along with FTTB/FTTH; Optical Distribution Network (Optical Distributing Network; ODN) net structure has exceeded the complexity of original optical communication net, and is in this type of network, few because of number of, lines for the protection of basic routing line; Simple structure, generally the machine room at the communication equipment place carry out optical line by selection carry out route protection.For example:
Type A protection, the trunk optical fiber route protection like Fig. 1 (a), can be protected the trunk optical fiber circuit, is mainly independently accomplished by OLT (Optical Line Terminal, optical fiber cable termination equipment) equipment;
The type B protection, trunk optical fiber circuit and branch optical fiber route protection are like Fig. 1 (b); Can protect trunk optical fiber circuit and branch optical fiber circuit; But no matter when what line fault problem occurring, provide completely the road to switch, mainly independently accomplish by OLT equipment;
The Type C protection, the branch optical fiber route protection like Fig. 1 (c), can be protected trunk optical fiber circuit and branch terminal fibre circuit, is mainly accomplished by OLT equipment and ONU equipment.
Can find out with in the upper type, mainly be that the trunk optical fiber circuit that is directed against is protected.And in the present FTTH/B scheme that adopts, what generally adopt is to carry out the scheme that user side inserts through secondary beam split mode; In this scheme; The one-level optical splitter of One's name is legion is to the incoming fiber optic circuit of secondary optical splitter in the ODN network; And, only rely on original scheme to provide protection to have all that net structure is complicated, system design is complicated, the degree of constructional difficulties for the protection of this type of branched line.
Summary of the invention
To the defective that exists in the prior art; The object of the present invention is to provide a kind of protection system, fibre circuit switching device of EPON; Select incoming fiber optic circuit with being employed in near-end light-dividing device output increase fibre circuit switching device via different routes; Connect two optical communications ports of apparatus for remote communication, the defencive function of optical network line is provided with this.
The guard method of a kind of EPON that the embodiment of the invention provides comprises:
The fibre circuit switching device obtains the fibre circuit handoff request, and said handoff request comprises: fibre circuit switching device port information or the forked working optical fiber link information that is connected with the apparatus for remote communication input;
According to said fibre circuit switching device port information or with apparatus for remote communication working optical fibre link information, connect candidate branch optical fiber link with apparatus for remote communication; Said fibre circuit switching device is connected through two optical fiber links with the apparatus for remote communication that at least one possesses the dual input port;
Notice OLT equipment, this optical fiber link handover success, the ONU/ONT devices communicating that the recovery of OLT equipment is connected with this optical fiber link.
The guard method of a kind of EPON that the embodiment of the invention provides comprises:
The fibre circuit switching device is monitored the optical transmission signal from this apparatus for remote communication through being connected to the forked working optical fiber link of apparatus for remote communication;
Judge according to said monitoring result whether the forked working optical fiber link breaks down,, then connect the candidate branch optical fiber link if break down; Said fibre circuit switching device is connected through two optical fiber links with the apparatus for remote communication that at least one possesses the dual input port;
Notice OLT equipment, this optical fiber link handover success, the ONU/ONT devices communicating that the recovery of OLT equipment is connected with this optical fiber link.
A kind of fibre circuit switching device that the embodiment of the invention provides comprises:
Information receiving unit is used to receive the relevant handoff request of optical communication system;
Switch control unit is used for obtaining to connect subsequent use optical fiber link according to said information after the handoff request in the information transmit-receive unit, and the connection of notice OLT apparatus optical fiber link, and recovery is communicated by letter with original ONT/ONU equipment.
Switch unit is used to connect several outputs of near-end light-dividing device, and passes through two different fibers links of switch connection of 1X2, and this optical fiber link is connected with the apparatus for remote communication that possesses the dual input port.
A kind of fibre circuit switching device that the embodiment of the invention provides comprises:
Information receiving unit is used to receive the relevant handoff request of optical communication system;
Switch control unit is used for obtaining to connect subsequent use optical fiber link according to said information after the handoff request in the information transmit-receive unit, and the connection of notice OLT apparatus optical fiber link, and recovery is communicated by letter with original ONT/ONU equipment.
Switch unit, by one 1: the switch of the light-dividing device of N or 2: a N and N 1X2 constitutes; Input connects OLT equipment, output and N the corresponding connection of apparatus for remote communication that possesses dual-port.
A kind of fibre circuit switching device that the embodiment of the invention provides comprises:
Optical detecting unit is used to be connected to the forked working optical fiber link that is connected with apparatus for remote communication, the light signal from this apparatus for remote communication is monitored, and feed back the result of said monitoring to switch control unit;
Information receiving unit is used for receiving and the transmission relevant information is given the far-end optical communication system;
Switch control unit judges according to said monitoring result whether the forked working optical fiber link breaks down, if break down, then connects the candidate branch optical fiber link, and the connection of notice OLT apparatus optical fiber link, and recovery is communicated by letter with original ONT/ONU equipment.
Switch unit is used to connect several outputs of near-end light-dividing device, and passes through two different fibers links of switch connection of 1X2, and this optical fiber link is connected with the apparatus for remote communication that possesses the dual input port.
The embodiment of the invention adopts two optical communications ports that the fibre circuit switching device connected apparatus for remote communication through the different fibers link; When some forked working optical fiber links that is connected with apparatus for remote communication break down, through connecting subsequent use branch optical fiber link, ensure the timely recovery of communication by the fibre circuit switching device; Simultaneously with respect to prior art; Adopt between two optical communications ports with apparatus for remote communication optical fiber link connection through different routes; And select one of them to communicate according to demand, and improved the ability of ODN network line protection greatly, help the promotion and application of FTTH/B.
Description of drawings
The present invention has following accompanying drawing:
Fig. 1: the networking sketch map of the guard method of the EPON of prior art;
A kind of flow chart of guard method of EPON among Fig. 2: the embodiment one;
A kind of system configuration sketch map of guard method of EPON among Fig. 3: the embodiment one;
A kind of structural representation of fibre circuit switching device among Fig. 4: the embodiment one;
Fig. 5: the organigram of communicating by letter between local side information transmission system and the fibre circuit switching device information transmit-receive unit;
A kind of organigram of switch unit among Fig. 6: the embodiment one;
A kind of organigram that possesses the switch unit of beam split function among Fig. 7: the embodiment one;
Trigger the flow chart that optical fiber link switches through management system or IP fringe node among Fig. 8: the embodiment one;
The flow chart that OLT device fires optical fiber link switches among Fig. 9: the embodiment one;
A kind of flow chart of guard method of EPON among Figure 10: the embodiment two;
The sketch map that is connected of optical detecting unit and optical switch among Figure 11: the embodiment two;
A kind of organigram that possesses the fibre circuit switching device of beam split function among Figure 12: the embodiment four;
A kind of structural representation of fibre circuit switching device among Figure 13: the embodiment five;
A kind of fibre circuit switching device structural representation among Figure 14: the embodiment six;
A kind of fibre circuit switching device structural representation that possesses 2: 4 shunt functions among Figure 15: the embodiment six.
Embodiment
Understand and embodiment of the present invention for the ease of those of ordinary skills, the present invention is made further detailed description below in conjunction with accompanying drawing and embodiment.
Below will combine the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is carried out complete, clearly description, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the present invention's protection.
The protection system of the open EPON of the present invention, the embodiment of the invention also provides corresponding fibre circuit switching device.Below be elaborated respectively.
The guard method of embodiment one, a kind of EPON, system flow chart is as shown in Figure 2, comprising:
A1, the fibre circuit switching device obtains the fibre circuit handoff request, and said handoff request can comprise: fibre circuit switching device port information or the forked working optical fiber link information that is connected with the apparatus for remote communication input;
In the present embodiment; When the forked working optical fiber link that is connected with certain apparatus for remote communication when OLT device learns fibre circuit switching device breaks down; Thereby cause all ONU/ONT equipment below this optical fiber link can't proper communication the time, OLT equipment sends the fibre circuit handoff request to the fibre circuit switching device.Be appreciated that said handoff request can also be that the ONU/ONT of this OLT equipment subordinate's appearance communication failure sends to the fibre circuit switching device; Can have multiplely to triggering the fibre circuit switching way, specifically not be construed as limiting the invention by which device fires.
For the handoff request that receives; ONU/ONT equipment utilization L2CP or OMC1 message or the Ethernet OAM message informing fibre circuit switching device that can be OLT equipment or IP fringe node or OLT equipment subordinate's appearance communication failure have ONU/ONT equipment to alarm or a certain road optical branch fault, and directly notice fibre circuit switching device starts the fibre circuit switching.
This forked working optical-fiber line fault of OLT device learns or ONU/ONT know that the process of forked working optical-fiber line fault comprises:
OLT equipment can't be received all ONU/ONT optical transmission signals that equipment sends of this forked working fibre circuit subordinate; Or the optical transmission signal that all ONU/ONT equipment of this branch optical fiber circuit subordinate of being received of OLT equipment send is unusual, judges this branch optical fiber line fault.
In the embodiment of the invention, said apparatus for remote communication can be 2: the optical branching device of M (M >=0, M is an integer) can be the equipment of extender or similar functions also, or possess the ONU/ONT equipment of dual communication port.
A2, fibre circuit switching device connect the subsequent use optical fiber link with apparatus for remote communication according to said fibre circuit switching device port information or the forked working optical fiber link information that is connected with the apparatus for remote communication input; Said fibre circuit switching device is connected through two optical fiber links with the apparatus for remote communication that at least one possesses the dual input port;
In the embodiment of the invention; Said according to fibre circuit switching device port information or the forked working optical fiber link information that is connected with the apparatus for remote communication input; The communication interface of unlatching and apparatus for remote communication is to connect the subsequent use optical fiber link that is connected with this apparatus for remote communication.The optical fiber link of opening and closing and apparatus for remote communication can adopt multiple mode to realize, as: optical switch, mechanical switch or electronic switch etc., concrete switch form is not construed as limiting the invention.
A3, notice OLT equipment, this optical fiber link handover success, the ONU/ONT devices communicating that the recovery of OLT equipment is connected with this optical fiber link.
In the embodiment of the invention; Behind the subsequent use optical fiber link of said fibre circuit switching device connection and apparatus for remote communication; System also has lock function; Be used for after device powers down, still can keeping the work on hand state, and after equipment self breaks down, still can return to work on hand state before the fault, ensure the normal operation of communication.
The embodiment of the invention adopts two optical communications ports that the fibre circuit switching device connected apparatus for remote communication through the different fibers link; When some forked working optical fiber links that is connected with apparatus for remote communication break down, through connecting subsequent use branch optical fiber link, ensure the timely recovery of communication by the fibre circuit switching device; Simultaneously with respect to prior art; Adopt between two optical communications ports with apparatus for remote communication optical fiber link connection through different routes; And select one of them to communicate according to demand, and improved the ability of ODN network line protection greatly, help the promotion and application of FTTH/B.
As shown in Figure 3, be one of the system configuration sketch map used of the embodiment of the invention one for example, certain OLT equipment is connected with the near-end optical splitter; This near-end optical splitter can be one 1: the light-dividing device of N (N >=0, N is an integer) also can be one 2: the light-dividing device of N; The output of this near-end light-dividing device passes through fibre circuit switching device and N individual 2: the distal portion light device of M (M >=0, M is an integer) is connected respectively, and this distal portion light device is connected with M ONU/ONT equipment respectively;
Wherein the near-end light-dividing device can be 1: the optical splitter of N also can be 2: the optical splitter of N, or the device of similar this function; For 2: the optical splitter of N, this optical splitter constitutes with various modes can be arranged being connected of OLT equipment, like the module that OLT equipment place is provided with similar optical switch, selects one and selects a certain optical fiber link; Perhaps the PON optical port redundancy backup of OLT equipment through 1: 1 is connected with two optical fiber links; Can have multiplely to OLT equipment to the connected mode between the one-level optical splitter, specifically form and be not construed as limiting the invention by which kind of connected mode.
As shown in Figure 4, be in the embodiment of the invention, the structural representation of fibre circuit switching device comprises: information transmit-receive unit, switch control unit, switch unit.
Said information transmit-receive unit is used to receive the relevant handoff request of optical communication system;
Wherein, said information transmit-receive unit can be to be received and sent messages by the 2G/3G/WIFI wireless system, also can receive and send messages through optical transceiver or embedded ONU, perhaps receives and sends messages through modes such as network interface cards.The embodiment of the invention is stressed is only to need to break down and cause this forked working optical fiber link subordinate's ONU/ONT equipment can't proper communication the time when OLT detects a certain forked working optical fiber link, and the fibre circuit switching device can be known this fault message or the handoff request that is caused by this fault message.
Provided the organigram of communicating by letter between several kinds of local side information transmission systems and the fibre circuit switching device information transmit-receive unit among Fig. 5; The wireless system that wherein adopts among Fig. 5 (a) is received and sent messages, and this wireless receiving processing unit can be radio receivers such as 2G/3G/WIFI; The optical transceiver module that adopts among Fig. 5 (b) is received and sent messages, and this optical transceiver module can be the single fiber bi-directional mode, also can be to adopt two fine one way systems; The embedded ONU that adopts among Fig. 5 (c) receives and sends messages; In this system; From terminal OLT device directly in the fibre circuit switching device embedded ONU module send information, optical branching device among the figure (Tap) is used for dividing expenditure sub-fraction light to give the ONU module from light path, is used to receive and send messages.Mode to the configuration information Transmit-Receive Unit is more, and specifically receiving and sending messages in which way is not construed as limiting the invention.
The embodiment of the invention is stressed is only to need to break down and cause all ONU/ONT equipment of this forked working optical fiber link subordinate can't proper communication the time when OLT detects a certain forked working optical fiber link, and the fibre circuit switching device can be known this fault message or the handoff request that is caused by this fault message.
Said switch control unit is used for obtaining to connect subsequent use optical fiber link according to said information after the handoff request in the information transmit-receive unit, and the connection of notice OLT apparatus optical fiber link, and recovery is communicated by letter with original ONT/ONU equipment.
In this example; The controlled function of said switch unit is independent switch control unit; Being appreciated that also can be by the information transmit-receive unit controls for the control of switch unit; What the embodiment of the invention was stressed is that the inner existence of the fine circuit switching device of a light requirement can realize that in due course the switching of optical fiber link gets final product according to relevant handoff request.Its control appliance can be provided with separately or be integrated on the equipment such as photodetector, signal dispatcher module.
Said switch unit is used to connect several outputs of near-end light-dividing device, and passes through the switch selection connection of 1X2 and two optical fiber links that optical communications port is connected of apparatus for remote communication; Structural representation is as shown in Figure 6.
Generally; The fibre circuit switching device connects a certain optical communications port of apparatus for remote communication; When obtaining associated fiber circuit handoff request, the fibre circuit switching device is closed and being connected of original optical communications port, and opens the subsequent use optical fiber link that is connected with this apparatus for remote communication; The recovery of OLT equipment is communicated by letter with ONT/ONU equipment, in time ensures the recovery of communication.
In the practical application; Also can near-end light-dividing device and fibre circuit switching device be combined a kind of fibre circuit switching device that possesses the beam split function of formation; Relevant switch unit organigram is as shown in Figure 7; The switch unit of this fibre circuit switching device is by one 1: the switch of the light-dividing device of N or 2: a N and N 1X2 constitutes, and this fibre circuit switching device input connects OLT equipment, output and N the corresponding connection of apparatus for remote communication that possesses dual-port; Correlation function no longer repeats at this as previously mentioned.
Below be the embodiment of the invention one application layer two control protocols (Layer 2Control Protocol; L2CP) or optical network unit management and control interface agreement (ONU Management and Control Interface; OMCI) or Simple Network Management Protocol (Simple Network Management) message or Ethernet maintenance management agreement (Operation Administration and Maintenance; OAM) process the switched description of giving an example of being correlated with, flow chart such as Fig. 8 and shown in Figure 9.
Fig. 8 be a kind of through management system or IP fringe node (as wideband network gateway (Broadband Network Gateway, BNG) or BAS Broadband Access Server (Broadband Remote Access Server, BRAS)) trigger the flow process of relevant handoff request.
A (1-1) is when m road forked working optical fiber link fault occurring; OLT Equipment Inspection this moment is to dropout (the Lost ofsignal of all ONU/ONT equipment that belong to this forked working optical fiber link subordinate; LOS)/LOF (Lost OfFrame, LOF) alarm;
A (1-2) OLT equipment can directly be given BNG/BRAS with L2CP/ Ethernet OAM message with this LOS/LOF alarm report, shows m road forked working optical fiber link fault;
A (1-3) BNG/BRAS is owing to receive the LOS/LOF alarm report of L2CP/ Ethernet OAM message, thereby judges m road forked working optical fiber link fault;
A (1-4) BNG/BRAS utilizes L2CP/ Ethernet OAM message informing fibre circuit switching device that m road branch optical fiber link failure is arranged, and can also directly notify the fibre circuit switching device to start the active and standby optical fiber link of m road branch optical fiber link is switched;
The switch of A (1-5) fibre circuit switching device port switching m is connected to the candidate branch optical fiber link;
A (1-6) OLT equipment recovers and the communicating by letter of this branch optical fiber link subordinate's ONU/ONT equipment.
Fig. 9 is the flow process of the relevant handoff request of OLT device fires.
A (2-1) is when m road forked working optical fiber link fault occurring; OLT Equipment Inspection this moment is to dropout (the Lost ofsignal of all ONU/ONT equipment that belong to this forked working optical fiber link subordinate; LOS)/LOF (Lost OfFrame, LOF) alarm;
A (2-2) OLT equipment is alarmed owing to detecting all ONU/ONT equipment LOS/LOF that belong to this forked working optical fiber link subordinate, thereby judges m road forked working optical fiber link fault;
A (2-3) OLT equipment utilization L2CP/ Ethernet OAM message/optical network unit management and control interface (ONU Managementand Control Interface; OMCI) notice of settlement fibre circuit switching device has m road branch optical fiber link failure, can also directly notify the fibre circuit switching device to start the active and standby optical fiber link of m road branch optical fiber link is switched;
The switch of A (2-4) fibre circuit switching device port switching m is connected to the candidate branch optical fiber link;
A (2-5) OLT equipment recovers and the communicating by letter of this branch optical fiber link subordinate's ONU/ONT equipment.
The guard method of embodiment two, a kind of EPON, system flow chart is shown in figure 10, comprising:
B1, the fibre circuit switching device is monitored the optical transmission signal from this apparatus for remote communication through being connected to the forked working optical fiber link of apparatus for remote communication;
In the embodiment of the invention, the forked working optical fiber link that said fibre circuit switching device is connected with said apparatus for remote communication connects through photodetector; Said photodetector is monitored the optical transmission signal from this apparatus for remote communication through being connected to the forked working optical fiber link that is connected with apparatus for remote communication.
B2 judges according to said monitoring result whether the forked working optical fiber link breaks down, if break down, then connects the candidate branch optical fiber link; Said fibre circuit switching device is connected through two optical fiber links with the apparatus for remote communication that at least one possesses the dual input port;
B3, notice OLT equipment, this optical fiber link handover success, the ONU/ONT devices communicating that the recovery of OLT equipment is connected with this optical fiber link.
The embodiment of the invention two is with the difference of embodiment one; Increased monitoring device in the fibre circuit switching device to the forked working optical fiber link; Through to monitoring from the optical transmission signal of the forked working optical fiber link that is connected with the far-end optical communication equipment; Then can obtain state, and start the switching of candidate branch optical fiber link in view of the above the forked working optical fiber link.
In this example, can realize this function through increasing photodetector at the optical switch place, shown in figure 11 is photodetector and the sketch map that is connected of optical switch.Comprise: photodetector and splitter (Tap).
Wherein, photodetector is equivalent to have or not in the detection fiber device of optical transmission signal, can be luminous power device, optical signal receiver; Concrete function is: to the optical transmission signal monitoring from the forked working optical fiber link that is connected with the far-end optical communication equipment; If within a certain period of time, on port, do not monitor any optical transmission signal, perhaps optical transmission signal is unusual; Then directly or through LC trigger the switching of optical switch circuit, connect corresponding candidate branch optical fiber link through photodetector.
In this example; Photodetector can be the luminous power device, also can be optical signal receiver, the light detecting device that perhaps has similar functions; Corresponding photodetector and optical branching device connected mode also can be different; The embodiment of the invention is stressed is that a light requirement detection means is a kind ofly can monitor the optical transmission signal that has or not in the forked working optical fiber link from apparatus for remote communication, or the unusual device of optical transmission signal get final product, specifically be which kind of device not conduct to the restriction of present embodiment.
In this example; That trigger the switching of optical switch circuit is photodetector or LC; The embodiment of the invention is stressed is that the inner existence of the fine circuit switching device of a light requirement can be according to the obtaining the transmission state of forked working optical fiber link that is obtained; Realizing in due course that the optical switch circuit switches gets final product, and its control appliance can be provided with separately or be integrated on the equipment such as photodetector.
Embodiment three, a kind of fibre circuit switching device, structural representation is as shown in Figure 4, comprising: information transmit-receive unit, switch control unit, switch unit.
Said information transmit-receive unit is used to receive the relevant handoff request of optical communication system;
Said switch control unit is used for obtaining to connect subsequent use optical fiber link according to said information after the handoff request in the information transmit-receive unit, and the connection of notice OLT apparatus optical fiber link, and recovery is communicated by letter with original ONT/ONU equipment.
Said switch unit is used to connect several outputs of near-end light-dividing device, and passes through the switch selection connection of 1X2 and two optical fiber links that optical communications port is connected of apparatus for remote communication.
Switch control unit also has lock function described in the embodiment of the invention three; Be used for after device powers down, still can keeping the work on hand state; And after equipment self breaks down, still can return to work on hand state before the fault, ensure the normal operation of communication.
Embodiment four, a kind of fibre circuit switching device are with the difference of fibre circuit switching device among the embodiment three:
The switch unit of said this fibre circuit switching device is by one 1: the switch of the light-dividing device of N or 2: a N and N 1X2 constitutes, and this fibre circuit switching device input connects OLT equipment, output and N the corresponding connection of apparatus for remote communication that possesses dual-port;
Be appreciated that; Fibre circuit switching device in the present embodiment can also for; The system that switch unit group that employing is made up of a plurality of switch units that possess the beam split function and information transmit-receive unit, switch control unit are formed jointly, the system configuration sketch map is shown in figure 12.Wherein, a plurality of switch unit groups of the common composition of switch unit that possess the beam split function, the whole operating state of this system is responsible for controlling in switch control unit and information transmit-receive unit.
Present embodiment is compared with embodiment three, and the fibre circuit switching device possesses the beam split function, is convenient to real project using more, helps of the present invention applying.
Embodiment five, a kind of fibre circuit switching device, and structural representation is shown in figure 13, comprising: optical detecting unit, information transmit-receive unit, switch control unit, switch unit.The difference of the fibre circuit switching device among present embodiment and embodiment three, the embodiment four is:
Said optical detecting unit is used to be connected to the forked working optical fiber link that is connected with apparatus for remote communication, the light signal from this apparatus for remote communication is monitored, and feed back the result of said monitoring to switch control unit;
Said information transmit-receive unit is used for receiving and the transmission relevant information is given the far-end optical communication system;
Said switch control unit judges according to said monitoring result whether the forked working optical fiber link breaks down, if break down, then connects the candidate branch optical fiber link, and the connection of notice OLT apparatus optical fiber link, and recovery is communicated by letter with original ONT/ONU equipment.
The switch unit function is identical among said switch unit function and embodiment three, the embodiment four, no longer repeats at this.
Said information transmit-receive unit in the previous embodiment of the present invention receives the equipment of external information for the fibre circuit switching device; Also can introduce independent information transmission system and OLT equipment or IP fringe node communicates and gets in touch; The fibre circuit switching device is connected with this information transmission system through network interface or other physical interfaces, obtains associated fiber circuit handover information.Should not be regarded as limitation of the present invention to this.
Said switch control unit in the previous embodiment of the present invention is the equipment that fibre circuit switching device inside makes a decision and controls; Can be integrated on the entity hardware of existence, as be integrated in the equipment such as light detecting device, radio receiving transmitting module, optical transceiver module, optical switch.
Embodiment six, a kind of fibre circuit switching device, the difference of the fibre circuit switching device in present embodiment and the previous embodiment is:
Said switch control unit also has the fiber port information display function; Be used for when the needs workmen carries out the fibre circuit operation; Demonstration needs the fiber port information of operation on the liquid crystal display screen/LED screen of fibre circuit switching device, and is opening the demonstration of LED lamp at fiber port; Unnecessary fault appears when avoiding the human operational error.
Figure 14, a kind of fibre circuit switching device structural representation for having this type of function shown in Figure 15 wherein are medium-sized fibre circuit switching device among Figure 14, and Figure 15 is for possessing the fibre circuit switching device of 2: 4 shunt functions; Among the figure in the fibre circuit switching device LED lamp be used for display device fiber port state; LED screen/liquid crystal display screen is used for when the needs workmen carries out the fibre circuit operation in to equipment place fiber cable cross connection box; Demonstration needs the fiber port place fibre circuit switching device positional information of operation on the liquid crystal display screen/LED screen of fibre circuit switching device; Or positional information in the fiber cable cross connection box of fiber port place, and show at associated fiber port open LED lamp.Adopt this mode, can effectively avoid when the needs workmen operates fiber port, can't discerning correct fiber port position, thus the communication failure of avoiding artificial operate miss to cause.
More than guard method, fibre circuit switching device and the system of a kind of EPON that the embodiment of the invention provided carried out detailed introduction; Used concrete example of part among this paper principle of the present invention and implementation method are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept; As far as one of ordinary skill in the art, according to thought of the present invention, on embodiment and range of application, all have certain change simultaneously, in sum, this description should not be construed as limitation of the present invention.
Claims (21)
1. the guard method of an EPON is characterized in that, comprising:
Step 1, when work branch optical fiber link occurs fault that said fibre circuit switching device is connected with certain apparatus for remote communication;
Step 2, fibre circuit switching device are communicated with the candidate branch optical fiber link with this apparatus for remote communication; Said fibre circuit switching device is connected through two optical fiber links with the apparatus for remote communication that at least one possesses the dual input port;
Step 3, fibre circuit switching device notice OLT equipment, this optical fiber link handover success, the ONU/ONT devices communicating that the recovery of OLT equipment is connected with this optical fiber link.
2. the method for claim 1 is characterized in that, the said apparatus for remote communication that possesses the dual input port is 2: the optical branching device of M or extender, or possess the optical network unit ONU/ONT Optical Network Terminal ONT equipment of dual communication port.
3. method as claimed in claim 2 is characterized in that, said light-dividing device is: optical branching device or extender.
4. like any described method of claim 1 to 3, it is characterized in that the process of the work branch optical fiber link occurs fault that said fibre circuit switching device is connected with certain apparatus for remote communication comprises:
If in the time of presetting, OLT fails to receive the optical transmission signal that all ONU/ONT equipment of this work branch optical fiber link subordinate are sent, and shows that then this branch optical fiber link breaks down;
Perhaps if in the time of presetting, it is unusual that OLT obtains the optical transmission signal that all ONU/ONT equipment of this work branch optical fiber link subordinate are sent, and shows that then this branch optical fiber link breaks down.
5. method as claimed in claim 4 is characterized in that, said fibre circuit switching device connection comprises with the process of the candidate branch optical fiber link of this apparatus for remote communication:
When the work branch optical fiber link that is connected with a certain apparatus for remote communication through the fibre circuit switching device when the OLT device learns breaks down; Send handoff request to the fibre circuit switching device, the fibre circuit switching device is communicated with the candidate branch optical fiber link with this apparatus for remote communication.
6. method as claimed in claim 4 is characterized in that, said fibre circuit switching device connection also comprises with the process of the candidate branch optical fiber link of this apparatus for remote communication:
When the work branch optical fiber link that is connected with a certain apparatus for remote communication through the fibre circuit switching device when the OLT device learns breaks down; Send relevant alarm information to the IP fringe node; The IP fringe node sends handoff request to the fibre circuit switching device, and the fibre circuit switching device is communicated with the candidate branch optical fiber link with this apparatus for remote communication.
7. like claim 5,6 any described methods, it is characterized in that said OLT equipment or IP fringe node comprise to the process that the fibre circuit switching device sends handoff request:
OLT equipment sends relevant information to the embedded ONU equipment of fibre circuit switching device;
Or OLT equipment or IP fringe node send relevant information through the 2G/3G/WIFI wireless transmitting system to the fibre circuit switching device;
Or OLT equipment or IP fringe node send relevant information through fiber optical transceiver to the fibre circuit switching device.
8. method as claimed in claim 7; It is characterized in that said OLT equipment or IP fringe node comprise to the handoff request that the fibre circuit switching device sends: fibre circuit switching device port information or the work branch optical fiber link information that is connected with the apparatus for remote communication input.
9. method as claimed in claim 8; It is characterized in that; The candidate branch optical fiber link that said fibre circuit switching device is communicated with this apparatus for remote communication comprises: be specially according to said fibre circuit switching device port information or with apparatus for remote communication work branch optical fiber link information, connect candidate branch optical fiber link with apparatus for remote communication; Said fibre circuit switching device is connected through two optical fiber links with the apparatus for remote communication that at least one possesses the dual input port.
10. like any described method of claim 1 to 3, it is characterized in that the process of the work branch optical fiber link occurs fault that said fibre circuit switching device is connected with certain apparatus for remote communication comprises:
The fibre circuit switching device is monitored the optical transmission signal from this apparatus for remote communication through being connected to the work branch optical fiber link of apparatus for remote communication; And whether break down according to said monitoring result judgment task branch optical fiber link.
11. method as claimed in claim 10 is characterized in that, the work branch optical fiber link that said fibre circuit switching device is connected with said apparatus for remote communication connects through photodetector;
Said fibre circuit switching device comprises monitoring from the optical transmission signal of this apparatus for remote communication through being connected to the work branch optical fiber link that is connected with apparatus for remote communication:
Said photodetector is monitored the optical transmission signal from this apparatus for remote communication through being connected to the work branch optical fiber link that is connected with apparatus for remote communication.
12. method as claimed in claim 11 is characterized in that, the process that whether breaks down according to said monitoring result judgment task branch optical fiber link comprises:
If in the time of presetting, photodetector fails to detect the optical transmission signal from this work branch optical fiber link apparatus for remote communication side, then judgment task branch optical fiber link occurs fault;
Perhaps if in the time of presetting, photodetector detects from the optical transmission signal of this work branch optical fiber link apparatus for remote communication side unusual, then judgment task branch optical fiber link occurs fault.
13. method as claimed in claim 12 is characterized in that, after said monitoring result judgment task branch optical fiber link occurs fault, the fibre circuit switching device is communicated with and the candidate branch optical fiber link of this apparatus for remote communication comprises:
Said fibre circuit switching device is connected the candidate branch optical fiber link with this apparatus for remote communication, and at least one apparatus for remote communication that possesses the dual input port of this fibre circuit switching device is through two optical fiber links connections.
14. a fibre circuit switching device is characterized in that, comprising:
Information receiving unit is used to receive the relevant handoff request of optical communication system;
Switch control unit is used for after the information transmit-receive unit obtains handoff request, connecting the candidate branch optical fiber link according to said information, and the connection of notice OLT apparatus optical fiber link, and recovery is communicated by letter with original ONT/ONU equipment.
Switch unit is used to connect several outputs of near-end light-dividing device, and passes through two different fibers links of switch connection of 1X2, and this optical fiber link is connected with the apparatus for remote communication that possesses the dual input port.
15. fibre circuit switching device as claimed in claim 14 is characterized in that, said information receiving unit is embedded ONU equipment, and perhaps optical transceiver, or 2G/3G/WIFI wireless transmitting system constitutes.
16. fibre circuit switching device as claimed in claim 15 is characterized in that, said switch unit, and by one 1: the switch of the light-dividing device of N or 2: a N and N 1X2 constitutes; Input connects OLT equipment, output and N the corresponding connection of apparatus for remote communication that possesses dual-port.
17. like claim 14 or 16 described fibre circuit switching devices, it is characterized in that the switch of said 1X2 specifically is used for the optical fiber link through opening and closing and apparatus for remote communication, adopt optical switch, mechanical switch or electronic switch.
18. a fibre circuit switching device is characterized in that, comprising:
Optical detecting unit is used to be connected to the forked working optical fiber link that is connected with apparatus for remote communication, the light signal from this apparatus for remote communication is monitored, and feed back the result of said monitoring to switch control unit;
Information receiving unit is used for receiving and the transmission relevant information is given the far-end optical communication system;
Switch control unit judges according to said monitoring result whether the forked working optical fiber link breaks down, if break down, then connects the candidate branch optical fiber link, and the connection of notice OLT apparatus optical fiber link, and recovery is communicated by letter with original ONT/ONU equipment;
Switch unit is used to connect several outputs of near-end light-dividing device, and passes through two different fibers links of switch connection of 1X2, and this optical fiber link is connected with the apparatus for remote communication that possesses the dual input port.
19. fibre circuit switching device as claimed in claim 18 is characterized in that, said optical detecting unit is a kind of photodetector.
20. like claim 17 or 19 described fibre circuit switching devices; It is characterized in that; Said switch control unit; Also have the line lock function, be used for after device powers down, still can keeping the work on hand state, and after equipment self breaks down, still can return to work on hand state before the fault.
21. like claim 17 or 19 described fibre circuit switching devices; It is characterized in that; Said switch control unit; Also have the fiber port information display function, be used for when the needs workmen carries out the fibre circuit operation to belonging in the fiber cable cross connection box, demonstration needs the fiber port place fibre circuit switching device positional information of operation on the liquid crystal display screen/LED screen of fibre circuit switching device; Or positional information in the fiber cable cross connection box of fiber port place, and show at associated fiber port open LED lamp.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210045219.4A CN102684780B (en) | 2012-02-27 | 2012-02-27 | Optical network protecting method and optical fiber line switching equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210045219.4A CN102684780B (en) | 2012-02-27 | 2012-02-27 | Optical network protecting method and optical fiber line switching equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102684780A true CN102684780A (en) | 2012-09-19 |
| CN102684780B CN102684780B (en) | 2015-02-25 |
Family
ID=46816204
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210045219.4A Expired - Fee Related CN102684780B (en) | 2012-02-27 | 2012-02-27 | Optical network protecting method and optical fiber line switching equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102684780B (en) |
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103107840A (en) * | 2013-01-30 | 2013-05-15 | 武汉普林光通科技有限公司 | Method and device for optical-fiber circuit protecting |
| CN103441792A (en) * | 2013-08-19 | 2013-12-11 | 无锡路通视信网络股份有限公司 | Multi-channel optical fiber automatic backup device for broadcasting network |
| CN103780302A (en) * | 2012-10-19 | 2014-05-07 | 京信通信系统（中国）有限公司 | Control link switching method and device and RRU in double fiber transmission system |
| CN104104429A (en) * | 2014-07-10 | 2014-10-15 | 上海盈智科技有限公司 | Automatic light bypassing method achieved through MEMS optical switch |
| CN104125008A (en) * | 2014-07-30 | 2014-10-29 | 中国联合网络通信集团有限公司 | Method and device for protecting distribution fibers |
| CN104811239A (en) * | 2015-03-25 | 2015-07-29 | 常湧 | Timing and locking system and method based on automatic fiber switching protection |
| CN107070543A (en) * | 2017-04-13 | 2017-08-18 | 国家电网公司 | A kind of intelligent substation do not have a power failure carry out optical-fibre channel inspection method |
| CN107196699A (en) * | 2017-06-29 | 2017-09-22 | 中国电力科学研究院 | A kind of method and system for diagnosing multi-layer classification passive optical-fiber network failure |
| CN109639348A (en) * | 2018-12-20 | 2019-04-16 | 常州太平通讯科技有限公司 | Quickly detection optical cable on-off and the method for positioning |
| CN109818671A (en) * | 2017-11-22 | 2019-05-28 | 全球能源互联网研究院有限公司 | A kind of control method and system for intelligent light with measurement |
| CN110493670A (en) * | 2019-07-22 | 2019-11-22 | 中国联合网络通信集团有限公司 | A kind of interruption of optical cables determination method and device |
| CN111277324A (en) * | 2020-01-19 | 2020-06-12 | 国网山东省电力公司青岛供电公司 | Optical fiber link channel monitoring system |
| CN112614323A (en) * | 2020-11-30 | 2021-04-06 | 国网山东省电力公司滨州供电公司 | Electric energy meter with intranet switches function |
| CN112865871A (en) * | 2020-12-31 | 2021-05-28 | 京信网络系统股份有限公司 | Networking method, networking system and communication method of multi-stage remote equipment |
| CN113691306A (en) * | 2021-07-08 | 2021-11-23 | 曙光网络科技有限公司 | Method, system and storage medium for protecting optical fiber circuit |
| WO2022151786A1 (en) * | 2021-01-14 | 2022-07-21 | 华为技术有限公司 | Light-splitting apparatus, dual-mode onu, optical network system and communication method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101667865A (en) * | 2009-09-30 | 2010-03-10 | 中兴通讯股份有限公司 | Device for realizing protection switching in wavelength division multiplexing passive optical network (WDM PON), system and method therefor |
| CN101895792A (en) * | 2009-05-21 | 2010-11-24 | 中兴通讯股份有限公司 | Protection system and method based on passive optical network |
| CN101995606A (en) * | 2009-08-28 | 2011-03-30 | 华为技术有限公司 | Protection switching method for long-range passive optical network and extender box |
-
2012
- 2012-02-27 CN CN201210045219.4A patent/CN102684780B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101895792A (en) * | 2009-05-21 | 2010-11-24 | 中兴通讯股份有限公司 | Protection system and method based on passive optical network |
| CN101995606A (en) * | 2009-08-28 | 2011-03-30 | 华为技术有限公司 | Protection switching method for long-range passive optical network and extender box |
| CN101667865A (en) * | 2009-09-30 | 2010-03-10 | 中兴通讯股份有限公司 | Device for realizing protection switching in wavelength division multiplexing passive optical network (WDM PON), system and method therefor |
Cited By (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103780302B (en) * | 2012-10-19 | 2016-03-30 | 京信通信系统（中国）有限公司 | Control link changing method, device and RRU device in two fine transmission system |
| CN103780302A (en) * | 2012-10-19 | 2014-05-07 | 京信通信系统（中国）有限公司 | Control link switching method and device and RRU in double fiber transmission system |
| CN103107840A (en) * | 2013-01-30 | 2013-05-15 | 武汉普林光通科技有限公司 | Method and device for optical-fiber circuit protecting |
| CN103441792A (en) * | 2013-08-19 | 2013-12-11 | 无锡路通视信网络股份有限公司 | Multi-channel optical fiber automatic backup device for broadcasting network |
| CN103441792B (en) * | 2013-08-19 | 2016-05-04 | 无锡路通视信网络股份有限公司 | For the multi-channel optical fibre automatic backup device of radio network |
| CN104104429A (en) * | 2014-07-10 | 2014-10-15 | 上海盈智科技有限公司 | Automatic light bypassing method achieved through MEMS optical switch |
| CN104125008A (en) * | 2014-07-30 | 2014-10-29 | 中国联合网络通信集团有限公司 | Method and device for protecting distribution fibers |
| CN104811239A (en) * | 2015-03-25 | 2015-07-29 | 常湧 | Timing and locking system and method based on automatic fiber switching protection |
| CN107070543A (en) * | 2017-04-13 | 2017-08-18 | 国家电网公司 | A kind of intelligent substation do not have a power failure carry out optical-fibre channel inspection method |
| CN107070543B (en) * | 2017-04-13 | 2019-07-05 | 国家电网公司 | A kind of intelligent substation does not have a power failure the method for carrying out optical-fibre channel inspection |
| CN107196699A (en) * | 2017-06-29 | 2017-09-22 | 中国电力科学研究院 | A kind of method and system for diagnosing multi-layer classification passive optical-fiber network failure |
| CN109818671B (en) * | 2017-11-22 | 2021-08-06 | 全球能源互联网研究院有限公司 | Control method and system for intelligent optical metrology |
| CN109818671A (en) * | 2017-11-22 | 2019-05-28 | 全球能源互联网研究院有限公司 | A kind of control method and system for intelligent light with measurement |
| CN109639348A (en) * | 2018-12-20 | 2019-04-16 | 常州太平通讯科技有限公司 | Quickly detection optical cable on-off and the method for positioning |
| CN110493670A (en) * | 2019-07-22 | 2019-11-22 | 中国联合网络通信集团有限公司 | A kind of interruption of optical cables determination method and device |
| CN110493670B (en) * | 2019-07-22 | 2022-10-14 | 中国联合网络通信集团有限公司 | Optical cable interruption judgment method and device |
| CN111277324A (en) * | 2020-01-19 | 2020-06-12 | 国网山东省电力公司青岛供电公司 | Optical fiber link channel monitoring system |
| CN112614323A (en) * | 2020-11-30 | 2021-04-06 | 国网山东省电力公司滨州供电公司 | Electric energy meter with intranet switches function |
| CN112865871A (en) * | 2020-12-31 | 2021-05-28 | 京信网络系统股份有限公司 | Networking method, networking system and communication method of multi-stage remote equipment |
| CN112865871B (en) * | 2020-12-31 | 2022-04-01 | 京信网络系统股份有限公司 | Networking method, networking system and communication method of multi-stage remote equipment |
| WO2022151786A1 (en) * | 2021-01-14 | 2022-07-21 | 华为技术有限公司 | Light-splitting apparatus, dual-mode onu, optical network system and communication method |
| CN113691306A (en) * | 2021-07-08 | 2021-11-23 | 曙光网络科技有限公司 | Method, system and storage medium for protecting optical fiber circuit |
| CN113691306B (en) * | 2021-07-08 | 2022-09-23 | 曙光网络科技有限公司 | Method, system and storage medium for protecting optical fiber circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102684780B (en) | 2015-02-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102684780B (en) | Optical network protecting method and optical fiber line switching equipment | |
| CN101854566B (en) | Passive optical network protection method and active/standby switch device and system | |
| CN102684810B (en) | Optical network protection method, optical link switching control device and optical link switching control system | |
| CN102823270B (en) | The method and apparatus of the protection in optical-fiber network | |
| CN101822070B (en) | Communications network | |
| US6005694A (en) | Method and system for detecting optical faults within the optical domain of a fiber communication network | |
| EP2051442B1 (en) | Method, system and apparatus for protecting wavelength division multiplex transmission | |
| CN1258270C (en) | Passive optical network protection method | |
| US6850706B2 (en) | Method for monitoring the operation of optical supply line fibers | |
| CN101630972A (en) | Optical fiber line intelligent detection system and optical fiber line intelligent detection method for wavelength division multiplex (WDM) network | |
| CN102714545A (en) | Optical transceiver module, passive optical network system, optical fiber detection method and system | |
| US6798991B1 (en) | Optical communication systems, optical communication system terminal facilities, optical communication methods, and methods of communicating within an optical network | |
| CN102064885A (en) | Method and device for rapid protection switching of passive optical network (PON) ports in any slot position in 10 Gbit/s Ethernet PON (10G-EPON) system | |
| CN102130717B (en) | Method for realizing distributed protection and passive optical network (PON) system | |
| US11290203B2 (en) | Circuitry for remote optical communications devices and methods utilizing same | |
| CN206481302U (en) | A kind of fibre circuit protector for preparing and carrying fine detection | |
| CN104426625A (en) | Method, device, and system for ranging of passive optical network standby optical fiber link | |
| CN101282586A (en) | Method, system and apparatus for detecting optical fiber fault in passive optical network | |
| CN107666362A (en) | A kind of power communication multi-service isolation access system and cut-in method | |
| CN102340392A (en) | Method and system for improving reliability of service in passive optical network system | |
| CN101707507B (en) | Multi-wavelength passive optical network system and protecting method thereof as well as multi-wavelength far-end nodes | |
| CN110391865A (en) | A kind of new system of the semi-active OLP of WDM | |
| CN101995606B (en) | Protection switching method for long-range passive optical network and extender box | |
| CN103297123A (en) | Method and system for monitoring light splitter | |
| CN106452565A (en) | Double-PON double-MAC protection power collection device and working method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| ASS | Succession or assignment of patent right |
Owner name: WUHAN PULIN GUANGTONG TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: WUHAN PULIN ELECTRONIC CO., LTD. Effective date: 20130201 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20130201 Address after: 430074 Hubei Province, Wuhan city Hongshan District Luoyu Road No. 446 hi tech building B Applicant after: WUHAN PULIN GUANGTONG TECHNOLOGY Co.,Ltd. Address before: 430074 Hubei Province, Wuhan city Hongshan District Luoyu Road No. 446 hi tech building B Applicant before: WUHAN PULIN ELECTRONIC Co.,Ltd. |
|
| 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: 20150225 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |