CN102035599A - FTTH passive optical link monitoring system and method - Google Patents
FTTH passive optical link monitoring system and method Download PDFInfo
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Abstract
The invention relates to a fiber to the home (FTTH) passive optical link monitoring system and an FTTH passive optical link monitoring method. The system comprises an optical distribution network (ODN) connected with an optical network unit (ONU), wherein an input end of the ODN is connected with an optical line terminal (OLT) system end for monitoring and feeding back; and a monitoring center is arranged at the OLT system end. The method comprises that: master control ONU detection equipment transmits a testing command to each ONU in an optical network regularly, receives response data, distinguishes whether an optical link is smooth according to the response data and transmits the response data to a computer; when the communication of the optical link is unsmooth, the computer transmits the testing command to an optical time domain reflectometry (OTDR), and the OTDR tests the states of all passive optical links and transmits the test data to the computer; and when receiving the monitoring data, the computer analyzes the data and acquires fault point data, saves the data and transmits the data to the monitoring center. Therefore, a fault point is rapidly and timely positioned and maintained, and the quality of the optical network transmission is guaranteed.
Description
Technical field
The present invention relates to the communications field, in Fiber to the home (Fiber To The Home, be called for short FTTH) engineering, to a kind of monitoring system and the method for passive optical link.
Background technology
Because optical communication has transmission frequency bandwidth, big, the signal transmission quality advantages of higher of message capacity, optical fiber becomes the backbone in the communication link gradually.Connect local side and user side with optical fiber as transmission medium, to become the main flow mode of optical fiber communication in the future, insert user's degree according to optical fiber, be divided into optical fiber again to commuting case (Fiber To The Cabinet, be called for short FTTC), Fiber-To-The-Building (Fiber To The Building, be called for short FTTB), Fiber to the home (Fiber To The Home, be called for short FTTH) etc., be main flow so that Fiber to the home again wherein,, data directly can be sent to client from local side by Fiber to the home, be the preferred plan that solves Access Network part in the fiber optic communication network, can merge traditional voice comprehensively, data, CATV, the access service that high definition IPTV etc. are nearly all.
In FTTH, EPON is the light chained technology of tool advantage, this network architecture as shown in Figure 1, it is made of optical line terminal OLT, Optical Distribution Network ODN and optical network unit ONU three parts, by the optical line terminal incoming light signal, light signal arrives a plurality of output ports by Optical Distribution Network, finally is connected to the user side optical network unit, thereby realizes that point inserts to the light signal of multiple spot.
The characteristics of EPON cover the region and have a wide reach, the network line complexity, especially the branched optical cable number of links is huge, when optical fiber damage or fracture appear in optical transmission chain, realize that fault location is quite difficult with investigation fast, therefore how each branch's light path is carried out trouble shooting, and after finding there is fault, the fault point is positioned the key that just becomes guarantee optical-fiber network transmission quality.
Summary of the invention
Be directed to the problems referred to above, the invention provides a kind of in the FTTH network engineering, the system and method that the optical link in the EPON is monitored automatically.Its objective is by this passive optical link monitoring system, all optical link states in automatic monitoring and the recording light network, energy Real-time Alarm when the optical link fault occurring, and can carry out the location and the demonstration of fault point, thereby shorten the optical link repair time greatly, reduce the maintenance difficulty, reduce the communication line maintenance cost in a large number.
For achieving the above object, technical scheme provided by the invention is as follows:
A kind of FTTH passive optical link monitoring system, comprise Optical Distribution Network ODN, Optical Distribution Network ODN connects optical network unit ONU, the input of described Optical Distribution Network ODN is connected with and is used to the optical line terminal OLT system end of monitoring and feeding back, and also is connected and installed with the server of monitoring software on the optical line terminal OLT system end as Surveillance center.At first each bar optical link in the EPON is numbered, and be saved in the database, receive the optical link Monitoring Data that OLT system end computer is sent simultaneously, status data and the related preservation of optical link numbering with these optical links, and real-time update, the employing graphical interfaces shows that the administrative staff of Surveillance center can consult the current state of arbitrary optical link at any time.Simultaneously monitoring software is judged the current state of optical links according to these data, and when optical link broke down, prompt alarm reached the purpose of real-time monitoring.
The optical line terminal OLT system end passes through together incoming fiber optic channel of mixer by optical line terminal OLT equipment, optical time domain reflectometer OTDR and master control ONU checkout equipment, and by communication interface optical time domain reflectometer OTDR is connected with computer with master control ONU checkout equipment.Optical time domain reflectometer OTDR is the instrument of optical fiber state in a kind of testing optical network, it is made according to the back scattering and the Fresnel inversion principle of light, by launching light pulse in optical fiber, receiving the information of returning at the OTDR port then tests, this equipment can be tested by computer control at present, and by communication interface test data is transferred to computer.Utilize this equipment energy measurement optical fiber attenuation, fiber failure point location and optical fiber along loss distribution situation of length etc., if optical fiber damage or fracture are arranged, OTDR can locate and damage the position, but in FTTH in the optical-fiber network of this point-to-multipoint, OTDR is difficult to distinguish for branch's light path, therefore also needs master control ONU checkout equipment to assist its test.
A kind of FTTH passive optical link monitoring method: master control ONU checkout equipment adopts timesharing frequency multiplexing technique timing each ONU in optical-fiber network to send test instruction and receive response data, then represent correctly that from the response data of ONU this link is unobstructed, otherwise represent that this link has communication failure, transfers to computer with this status data; When optical link appearance communication was obstructed, computer sent test command to OTDR, and OTDR tests all passive optical link states, and test data is sent to computer; Computer receives the Monitoring Data of OTDR and the Monitoring Data of master control checkout equipment, and faulty line numbering and position of failure point data are analyzed and drawn to data, and Surveillance center is preserved and sent to these data.
The ODN distribution network is that main devices connects into the pyramid form with optical fiber and optical branching device, to user side, can with optical branching device be node therebetween with input channel demultiplexing output channel, and optical link is numbered; User side is based on ONU, and ONU can receive the data that optical line terminal OLT equipment sends, and also can receive the test instruction that master control ONU checkout equipment sends and provide response signal.
By the sending and feed back the information that obtains of signal, the monitor staff can obtain the position of optical link fault point rapidly, and the very first time keeps in repair the fault point, in time removes fault, has ensured the quality of optical-fiber network transmission.
Description of drawings
The FTTH network architecture schematic diagram that Fig. 1 mentions for the present invention;
Fig. 2 is the system architecture diagram of passive optical link monitoring system of the present invention;
Fig. 3 is the flow chart of the monitoring software in the monitoring central server among the present invention;
Fig. 4 is the flow chart of the computer software of OLT system end among the present invention.
Embodiment
Below in conjunction with drawings and the specific embodiments the present invention is further described.
Set up a Surveillance center, this Surveillance center's platform mainly is made of server and monitoring software, and server is equipped with systems soft ware, database software and monitoring software, and server can link to each other with other computer by communication port (generally adopting network interface).The server hardware of Surveillance center is configured to: the above CPU of 2G, the above internal memory of 1G, the above hard disk of 200G, display more than 17 inches.Operating system can adopt WINDOWS2003Server, and database can adopt SQL SERVER 2003.
According to the actual light network configuration, wherein all optical links are numbered, for example, as shown in Figure 2, with the optical branching device is node, the input optical fibre of optical distribution network is numbered A, the output of first order optical branching device is numbered B1, B2 ... Bn, the output of second level optical branching device is numbered C1, C2, Cn, then each bar optical link has all had numbering, for example an AB1C1 in this optical-fiber network from the OLT system end to user side, and this link is again by A, B1, three sections compositions of C1, in the database of monitoring central server, link number and fragment number can be preserved, and corresponding one by one with it preservation of Link State data that test is obtained, thereby obtain Link State situation in the overall optical network.Certainly, according to different optical-fiber networks, also can adopt different numberings.
Monitoring central server links to each other with the computer of OLT system end by network and communicates according to communication protocol, Fig. 3 is the monitoring software flow chart in the monitoring central server, after server receives the packet that computer sends, according to communication protocol packet is resolved, and the validity of data judged and analyze, if be judged as invalid data then abandon, if be judged as valid data then data preserved into database, then the Link State data in the database are judged, whether check has link unusual, if have then alarm, if not then show normal by graphical interfaces.
At the OLT system end, OLT equipment, optical time domain reflectometer OTDR and master control ONU checkout equipment are passed through together incoming fiber optic channel of mixer, and optical time domain reflectometer OTDR is connected with computer with master control ONU checkout equipment by communication interface.Master control ONU checkout equipment adopts timesharing frequency multiplexing technique timing each ONU in optical-fiber network to send test instruction and receive response data, the response data of ONU represents then that correctly this link is unobstructed, otherwise represent that this link has communication failure, transfers to computer with this status data; When optical link appearance communication was obstructed, computer sent test instruction to OTDR, and OTDR tests all passive optical link states, and test data is sent to computer; Computer receives the Monitoring Data of OTDR and the Monitoring Data of master control checkout equipment, and faulty line numbering and position of failure point data are analyzed and drawn to data, and Surveillance center is preserved and sent to these data.
Fig. 4 is the computer software flow chart of OLT system end, after computer receives the test data of master control checkout equipment by communication interface, resolve this data, normal response data to these data and ONU are compared, if data consistent then show that optical link communication is normal, Surveillance center is preserved and be sent to data, if data exception then show have optical link to break down, send test instruction to OTDR, and read the test data of OTDR, obtain the fault point data after data are analyzed, data are preserved packing be sent to Surveillance center.
Claims (4)
1. FTTH passive optical link monitoring system, comprise Optical Distribution Network ODN, Optical Distribution Network ODN connects optical network unit ONU, it is characterized in that: the input of described Optical Distribution Network ODN is connected with and is used to the optical line terminal OLT system end of monitoring and feeding back, and also is connected and installed with the server of monitoring software on the optical line terminal OLT system end as Surveillance center.
2. FTTH passive optical link monitoring system according to claim 1, it is characterized in that: described optical line terminal OLT system end passes through together incoming fiber optic channel of mixer by optical line terminal OLT equipment, optical time domain reflectometer OTDR and master control ONU checkout equipment, and by communication interface optical time domain reflectometer OTDR is connected with computer with master control ONU checkout equipment.
3. described FTTH passive optical link monitoring system according to claim 1 and 2, it is characterized in that: described Optical Distribution Network ODN comprises optical branching device, and optical branching device connects into the pyramid form by optical fiber.
4. FTTH passive optical link monitoring method, it is characterized in that: master control ONU checkout equipment adopts timesharing frequency multiplexing technique timing each optical network unit ONU in optical-fiber network to send test instruction and receive response data, the response data of each optical network unit ONU represents then that correctly this link is unobstructed, otherwise represent that this link has communication failure, transfers to computer with this status data; When optical link appearance communication was obstructed, computer sent test command to OTDR, and OTDR tests all passive optical link states, and test data is sent to computer; Computer receives the Monitoring Data of OTDR and the Monitoring Data of master control checkout equipment, and faulty line numbering and position of failure point data are analyzed and drawn to data, and Surveillance center is preserved and sent to these data.
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| CN102377486A (en) * | 2011-11-23 | 2012-03-14 | 烽火通信科技股份有限公司 | System and method for monitoring non-reflection faults in passive optical network (PON) optical link |
| CN102761375A (en) * | 2012-07-10 | 2012-10-31 | 青岛海信宽带多媒体技术有限公司 | Optical line terminal optical terminal used in Gigabit passive optical network |
| CN102761366A (en) * | 2012-07-10 | 2012-10-31 | 青岛海信宽带多媒体技术有限公司 | Optical line terminal optical terminal used in 10 Gigabit passive optical network |
| WO2013097785A1 (en) * | 2011-12-31 | 2013-07-04 | 中兴通讯股份有限公司 | Optical fiber fault detection method and device |
| CN104467959A (en) * | 2013-09-20 | 2015-03-25 | 弗兰克公司 | Hands-free optical fiber testing using optical loss test instrument |
| CN104796192A (en) * | 2014-08-06 | 2015-07-22 | 深圳市亚光通信有限公司 | Intelligent real-time multichannel optical fibre monitoring system and method |
| CN106686134A (en) * | 2017-02-16 | 2017-05-17 | 国网江苏省电力公司无锡供电公司 | Non-intrusive fiber link cloud monitoring system and method |
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| CN108366251A (en) * | 2018-01-02 | 2018-08-03 | 杭州万隆光电设备股份有限公司 | A kind of cable television system optical link test device |
| CN109510663A (en) * | 2018-12-17 | 2019-03-22 | 潘子俊 | A kind of system and method that fiber optic cable monitor and big data analysis are carried out based on intelligent optical fiber distribution |
| CN110537187A (en) * | 2019-02-25 | 2019-12-03 | 华为技术有限公司 | A kind of topology treating method and apparatus and system |
| CN110706383A (en) * | 2019-11-06 | 2020-01-17 | 广东科徕尼智能科技有限公司 | Communication detection method and device applied to intelligent lock and storage medium |
| CN110809203A (en) * | 2019-10-15 | 2020-02-18 | 四川天邑康和通信股份有限公司 | System and method for expanding FTTH network by master-slave ONT |
| CN112152703A (en) * | 2019-06-27 | 2020-12-29 | 上海欣诺通信技术股份有限公司 | Link monitoring system applied to optical network |
| CN112564785A (en) * | 2020-11-19 | 2021-03-26 | 华为技术有限公司 | ODN device, optical fiber splice closure, network detection device and optical distribution network |
| CN112653511A (en) * | 2020-12-04 | 2021-04-13 | 苏州浪潮智能科技有限公司 | Server optical channel network card link state diagnosis device, method, equipment and medium |
| CN114900230A (en) * | 2022-04-25 | 2022-08-12 | 贵州电网有限责任公司 | Modeling method for digitization of all-optical link |
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| WO2013097785A1 (en) * | 2011-12-31 | 2013-07-04 | 中兴通讯股份有限公司 | Optical fiber fault detection method and device |
| CN102761366B (en) * | 2012-07-10 | 2015-09-30 | 青岛海信宽带多媒体技术有限公司 | Be applied to the optical line terminal optical module in ten gigabit passive optical networks |
| CN102761375A (en) * | 2012-07-10 | 2012-10-31 | 青岛海信宽带多媒体技术有限公司 | Optical line terminal optical terminal used in Gigabit passive optical network |
| CN102761366A (en) * | 2012-07-10 | 2012-10-31 | 青岛海信宽带多媒体技术有限公司 | Optical line terminal optical terminal used in 10 Gigabit passive optical network |
| CN104467959A (en) * | 2013-09-20 | 2015-03-25 | 弗兰克公司 | Hands-free optical fiber testing using optical loss test instrument |
| CN104796192B (en) * | 2014-08-06 | 2018-01-16 | 深圳市亚光通信有限公司 | A kind of intelligent real-time multichannel optic-fiber monitoring system and method |
| CN104796192A (en) * | 2014-08-06 | 2015-07-22 | 深圳市亚光通信有限公司 | Intelligent real-time multichannel optical fibre monitoring system and method |
| WO2017166922A1 (en) * | 2016-03-30 | 2017-10-05 | 中兴通讯股份有限公司 | Multicast service monitoring method and device |
| CN107294858A (en) * | 2016-03-30 | 2017-10-24 | 中兴通讯股份有限公司 | multicast service monitoring method and device |
| CN107294858B (en) * | 2016-03-30 | 2020-10-20 | 南京中兴软件有限责任公司 | Multicast service monitoring method and device |
| CN106788701A (en) * | 2016-12-26 | 2017-05-31 | 中国电信股份有限公司四川分公司 | A kind of method and system of positioning ODN network segment faults |
| CN106788701B (en) * | 2016-12-26 | 2019-06-14 | 中国电信股份有限公司四川分公司 | A kind of method and system positioning the segment fault of ODN network |
| CN106686134A (en) * | 2017-02-16 | 2017-05-17 | 国网江苏省电力公司无锡供电公司 | Non-intrusive fiber link cloud monitoring system and method |
| CN106686134B (en) * | 2017-02-16 | 2023-12-01 | 国网江苏省电力公司无锡供电公司 | Non-invasive optical fiber link cloud monitoring system and method |
| CN108366251A (en) * | 2018-01-02 | 2018-08-03 | 杭州万隆光电设备股份有限公司 | A kind of cable television system optical link test device |
| CN109510663A (en) * | 2018-12-17 | 2019-03-22 | 潘子俊 | A kind of system and method that fiber optic cable monitor and big data analysis are carried out based on intelligent optical fiber distribution |
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| CN110537187B (en) * | 2019-02-25 | 2021-01-26 | 华为技术有限公司 | Topology processing method, device and system |
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| CN110537187A (en) * | 2019-02-25 | 2019-12-03 | 华为技术有限公司 | A kind of topology treating method and apparatus and system |
| CN112152703A (en) * | 2019-06-27 | 2020-12-29 | 上海欣诺通信技术股份有限公司 | Link monitoring system applied to optical network |
| CN110809203A (en) * | 2019-10-15 | 2020-02-18 | 四川天邑康和通信股份有限公司 | System and method for expanding FTTH network by master-slave ONT |
| CN110809203B (en) * | 2019-10-15 | 2022-03-11 | 四川天邑康和通信股份有限公司 | System and method for expanding FTTH network by master-slave ONT |
| CN110706383A (en) * | 2019-11-06 | 2020-01-17 | 广东科徕尼智能科技有限公司 | Communication detection method and device applied to intelligent lock and storage medium |
| CN112564785B (en) * | 2020-11-19 | 2022-08-26 | 华为技术有限公司 | ODN device, optical fiber splice closure, network detection device and optical distribution network |
| CN112564785A (en) * | 2020-11-19 | 2021-03-26 | 华为技术有限公司 | ODN device, optical fiber splice closure, network detection device and optical distribution network |
| CN112653511A (en) * | 2020-12-04 | 2021-04-13 | 苏州浪潮智能科技有限公司 | Server optical channel network card link state diagnosis device, method, equipment and medium |
| CN112653511B (en) * | 2020-12-04 | 2022-11-25 | 苏州浪潮智能科技有限公司 | Server optical channel network card link state diagnosis device, method, equipment and medium |
| CN114900230A (en) * | 2022-04-25 | 2022-08-12 | 贵州电网有限责任公司 | Modeling method for digitization of all-optical link |
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Application publication date: 20110427 |