CN108462530B - Optical line terminal testing device - Google Patents
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- CN108462530B CN108462530B CN201611139775.2A CN201611139775A CN108462530B CN 108462530 B CN108462530 B CN 108462530B CN 201611139775 A CN201611139775 A CN 201611139775A CN 108462530 B CN108462530 B CN 108462530B
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
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Abstract
The invention provides an optical line terminal testing device, which comprises an optical combiner and an optical splitter, wherein the optical splitter comprises N optical fiber interfaces and a convergence interface, the optical combiner comprises a convergence interface and 2 optical fiber interfaces, N is a natural number greater than 1, and the N optical fiber interfaces are used for connecting optical ports of a passive optical network line card of an optical line terminal; the 2 optical fiber interfaces are used for connecting optical network units; the convergence interface is connected with the convergence interface through an optical fiber connector. The invention solves the problems of low test efficiency, complex interface connection and low utilization rate of optical network equipment in the prior art, reduces the test cost and improves the test efficiency.
Description
Technical Field
The present invention relates to the field of communications and computers, and in particular, to an optical line terminal testing apparatus, method, and system.
Background
Passive Optical Network (PON), as an emerging Optical fiber broadband access technology covering the last kilometer, includes Ethernet Passive Optical Network (EPON)/10G EPON/Gigabit Passive Optical Network (Gigabit-Capable PON, GPON)/10G GPON, and other technologies. The technology makes full use of the characteristics of an optical network and a passive optical splitter, reduces the equipment cost and the operation and maintenance cost of an operator, and provides a faster and more stable broadband network for users. The network can simultaneously bear voice and data services, and multi-network integration is achieved. At present, PON technology has become a main solution for broadband access technology. In the face of increasing market demands of PON equipment, equipment suppliers need to ensure reliability and stability of product quality, and the function test of PON line card hardware is particularly important; at present, the passive optical network line card needs to access the optical network units with the same number as the optical interfaces of the line card one by one, so that the interface connection is complex and the cost is high. If the line card supports both GPON and 10GPON, or supports EPON or 10G EOPN, the optical network units of two systems need to be accessed successively for testing, and the optical network unit which completes the test needs to be replaced by the optical network unit of the other system in the testing process to continue the test.
Aiming at the problems of low testing efficiency, complex interface connection and low utilization rate of optical network equipment of the existing optical network testing terminal testing method,
there is currently no effective solution
Disclosure of Invention
The invention provides an optical line terminal testing device, method and system, which at least solve the problems of low testing efficiency, complex interface connection and low utilization rate of optical network equipment in the prior art.
The invention provides an optical line terminal testing device, which comprises an optical combiner and an optical splitter, wherein the optical splitter comprises N optical fiber interfaces and a convergence interface, the optical combiner comprises a convergence interface and 2 optical fiber interfaces, N is a natural number greater than 1, and the N optical fiber interfaces are used for connecting optical ports of a passive optical network line card of an optical line terminal; the 2 optical fiber interfaces are used for connecting optical network units; the convergence interface is connected with the convergence interface through an optical fiber connector.
Further, N is 2, 4, 8, 16, or 32.
Further, the 2 optical fiber interfaces are also used for connecting the optical network units through optical fiber connectors.
Furthermore, the N optical fiber interfaces are respectively connected with the optical module.
Furthermore, the N optical fiber interfaces are respectively connected with the optical module through optical fiber connectors.
The invention also provides a test method of the optical network unit, which comprises the steps of starting 1 path of optical interface for receiving optical signals at a certain time interval, and closing the optical signal reception of other optical interfaces when the optical interface receives the optical signals; the optical signal is transmitted to the optical splitter by two optical network units through an optical combiner, the optical splitter comprises the N optical fiber interfaces and a convergence interface, the optical combiner comprises a convergence interface and 2 optical fiber interfaces, the 2 optical fiber interfaces are connected with the two optical network units in a one-to-one manner through optical fiber connectors, the convergence interface is connected with the convergence interface through optical fiber connectors, and the N optical fiber interfaces are connected with optical ports of the passive optical network line card of the optical line terminal in a one-to-one manner through optical fiber connectors; and testing the optical line terminal optical network line card according to the condition of receiving the optical signal.
The invention also provides an optical line terminal testing system, which comprises a control device, an optical line terminal testing device and an optical network unit, wherein:
the optical splitter optical fiber interface of the optical line terminal testing device is connected with the optical port of the passive optical network line card of the optical line terminal to be tested in a one-to-one manner, and the optical combiner optical fiber interface of the optical line terminal testing device is connected with the optical network unit; the control device is connected with the optical line terminal to be tested;
the control device is used for controlling the optical line terminal to be tested to start 1 path of optical interface at a time to receive optical signals at a certain time interval, and when the optical interface receives the optical signals, the control device simultaneously stops the reception of the optical signals of other optical interfaces;
the optical line terminal to be tested is used for starting 1 path of optical interface at a time at a certain time interval to receive optical signals, and when the optical interface receives the optical signals, closing the optical signal reception of other optical interfaces at the same time, and testing the passive optical network line card according to the condition of receiving the optical signals;
the optical line terminal testing device is used for transmitting optical signals sent by optical network units to optical interfaces of a passive optical network line card, the optical signals are transmitted to the optical splitter by the optical combiner, the optical splitter comprises the N optical fiber interfaces and a convergence interface, the optical combiner comprises a convergence interface and 2 optical fiber interfaces, the 2 optical fiber interfaces are connected with the two optical network units in a one-to-one mode through optical fiber connectors, the convergence interface is connected with the convergence interface through optical fiber connectors, and the N optical fiber interfaces are connected with the optical ports of the passive optical network line card of the optical line terminal in a one-to-one mode through the optical fiber connectors.
The invention provides an optical line terminal testing device, combines an optical splitter and an optical combiner, can test all optical interfaces of a passive optical network line card by only providing at most two optical network units, can simultaneously test the passive optical network line card simultaneously supporting GPON and 10GPON, or simultaneously supporting EPON or 10G EOPN, and does not need to replace the optical network units in the test. The problems of low testing efficiency, complex interface connection and low utilization rate of optical network equipment in the prior art are solved, the testing cost is reduced, and the testing efficiency is improved.
Drawings
Fig. 1 is a logic block diagram of an optical line terminal testing apparatus according to an embodiment of the present invention;
fig. 2 is a flowchart of an optical line terminal testing method according to an embodiment of the present invention;
figure 3 is a logical structure diagram of an optical line termination system according to an embodiment of the present invention;
Detailed Description
The invention will be described in detail hereinafter with reference to the accompanying drawings in conjunction with embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
It should be noted that the terms "first", "second", and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.
An embodiment of the present invention provides an optical line terminal testing apparatus, fig. 1 is a logic block diagram of an optical line terminal testing apparatus according to an embodiment of the present invention, as shown in fig. 1, the apparatus includes an optical combiner 11 and an optical splitter 12, the optical splitter includes N optical fiber interfaces and a convergence interface, the optical combiner includes a convergence interface and 2 optical fiber interfaces, N is a natural number greater than 1, where the N optical fiber interfaces are used to connect optical ports of an optical line terminal passive optical network line card; the 2 optical fiber interfaces are used for connecting optical network units; the convergence interface is connected with the convergence interface through an optical fiber connector.
An Optical port of a Line card of a traditional Optical Line Terminal (Optical Line Terminal, OLT) Passive Optical Network (PON) is tested, an asymmetric XGPON Line card test of an 8-port OLT is taken as an example, a traditional test environment needs to be provided with 16 Optical fibers, 8 GPON ONUs and 8 10G GPON ONUs in order to meet the test of 8 asymmetric XGPON ports of a panel, the test process is that 8 Optical modules connected with the GPON ONUs are inserted into a card port of a tested Line, the Optical fibers need to be pulled out after the test is completed, the Optical fibers connected with the 10G GPON ONUs are inserted again to perform a second test, and then the port function test coverage can be completed. The cost is high, the utilization rate of equipment is low because 16 interconnected optical fibers and 16 ONU need to be arranged, and the test efficiency is low because two sets of ONU optical fibers need to be inserted in the test process.
The apparatus provided in this aspect is shown in fig. 1, where the left side of an optical splitter 12 indicated in fig. 1 is provided with N interfaces for connecting optical ports of a PON line card of an OLT, the apparatus uses two optical interfaces of an optical combiner 11 to converge signals sent by an optical network unit, transmits the two converged optical signals to the optical splitter through an optical fiber connector, and the optical splitter splits optical signals sent by the converged optical network unit and transmitted by the optical fiber connector into N paths and then transmits the N paths to the optical ports of the line card connected to the optical interfaces of the optical splitter.
The device realizes the purpose of completing the function test of any port number optical port only by one type of ONU and only inserting one optical fiber, and can greatly simplify the test environment cost and improve the test efficiency.
The device described in the embodiment of the invention can select different optical splitters according to different numbers of network ports of the line card, and the optical splitters can be selected from any one of optical splitters with splitting ratios of 1: 2, 1: 4, 1: 8, 1: 16 and 1: 32, or optical splitters with other splitting ratios.
The embodiment of the invention can also connect the two optical fiber interfaces of the optical combiner with the optical network unit through the optical fiber connector.
The embodiment of the invention can also directly insert the N optical fiber interfaces of the optical splitter into the optical port of the line card after being respectively connected with the optical module, and can also be directly connected with the optical module on the line card.
The embodiment of the invention can also directly insert the N optical fiber interfaces of the optical splitter into the optical port of the line card after being connected with the optical module through the optical fiber connectors respectively, and can also directly connect with the optical module on the line card through the optical fiber connectors respectively so as to achieve the purpose of increasing the connection distance.
An embodiment of the present invention further provides an optical line terminal testing method, and fig. 2 is a flowchart of the optical line terminal testing method according to the embodiment of the present invention, and as shown in fig. 2, the method includes:
s201: starting 1 path of optical interface at one time according to a certain time interval to receive optical signals, wherein the optical interface receives the optical signals; meanwhile, the optical signal reception of other optical interfaces is closed;
the optical signal is transmitted to the optical splitter by two optical network units through an optical combiner, the optical splitter comprises the N optical fiber interfaces and a convergence interface, the optical combiner comprises a convergence interface and 2 optical fiber interfaces, the 2 optical fiber interfaces are connected with the two optical network units in a one-to-one manner through optical fiber connectors, the convergence interface is connected with the convergence interface through optical fiber connectors, and the N optical fiber interfaces are connected with optical ports of the passive optical network line card of the optical line terminal in a one-to-one manner through optical fiber connectors; and testing the optical line terminal optical network line card according to the condition of receiving the optical signal.
Because one ONU adopted by the device is simultaneously connected to a plurality of optical ports of a PON line card of the OLT, in order to avoid the conflict that a plurality of optical ports of the PON line card of the OLT are simultaneously accessed to the same ONU and product Serial Number (SN) values are the same, the PON optical ports of the OLT need to be specially controlled in a test method, an asymmetric XGPON line card test of an 8-port OLT to be tested is taken as an example, when the 1 st port is tested, the PON line card of the OLT needs to open the 1 st optical port through software configuration, close the 2 nd to 8 th optical ports, complete the test of the GPON ONU and the 10G GPON ONU of the 1 st optical port, then carry out the 2 nd optical port test, and similarly, when the test is carried out, the 1 st optical port and the 3 rd to 8 th optical ports need to be closed, open the 2 nd optical port to carry out the test of the GPON ONU and the 10G GPON ONU, and the like. During testing, only the port to be tested is opened, and other ports are in a closed state during testing, so that the testing is completed in sequence.
The invention also provides an optical line terminal testing system, which comprises a control device, an optical line terminal testing device and an optical network unit, wherein:
the optical splitter optical fiber interface of the optical line terminal testing device is connected with the optical port of the passive optical network line card of the optical line terminal to be tested in a one-to-one manner, and the optical combiner optical fiber interface of the optical line terminal testing device is connected with the optical network unit; the control device is connected with the optical line terminal to be tested;
the control device is used for controlling the optical line terminal to be tested to start 1 path of optical interface at a time to receive optical signals at a certain time interval, and when the optical interface receives the optical signals, the control device simultaneously stops the reception of the optical signals of other optical interfaces;
the optical line terminal to be tested is used for starting 1 path of optical interface at a time at a certain time interval to receive optical signals, and when the optical interface receives the optical signals, closing the optical signal reception of other optical interfaces at the same time, and testing the passive optical network line card according to the condition of receiving the optical signals;
the optical line terminal testing device is used for transmitting optical signals sent by optical network units to optical interfaces of a passive optical network line card, the optical signals are transmitted to the optical splitter by the optical combiner, the optical splitter comprises the N optical fiber interfaces and a convergence interface, the optical combiner comprises a convergence interface and 2 optical fiber interfaces, the 2 optical fiber interfaces are connected with the two optical network units in a one-to-one mode through optical fiber connectors, the convergence interface is connected with the convergence interface through optical fiber connectors, and the N optical fiber interfaces are connected with optical ports of the passive optical network line card of the optical line terminal in a one-to-one mode through optical fiber connectors.
The system described in the present invention is described below with asymmetric XGPON line card testing as an embodiment of the present invention, fig. 3 is a logical structure diagram of an optical line termination system according to an embodiment of the present invention, as shown in fig. 3, the test system needs a set of 31 PC machines, one OLT tester frame 32, an OLT main control environment board 33, one asymmetric XGPON line card 34 to be tested at 8 ports OLT, 8 optical modules connected to optical ports of the OLT PON line card, 10 single-mode fibers, an optical line terminal test device 35, one GPON ONU and one GPON ONU, wherein a network port of the PC machine is connected with a network port of the OLT main control environment board through a network cable, the PC machine and the main control environment board transmit test control instructions through the network cable, the 8 single-mode fibers are used for interconnecting the optical ports of the tested line card and the optical line terminal test device, and the 2 optical fibers are used for interconnecting the optical line terminal test device and the two ONU optical ports.
An ONU adopted by the device is simultaneously connected to 8 optical ports of a PON line card of an OLT, in order to avoid the conflict that a plurality of optical ports of the PON line card of the OLT are simultaneously accessed into the same ONU to bring the same product Serial Number (SN) value, when the 1 st port test is carried out, the PON line card of the OLT needs to enable the 1 st optical port to be opened through software configuration, the 2 nd to 8 th optical ports are closed, after the GPON ONU and the 10G GPON ONU test of the 1 st optical port is completed, the 2 nd optical port test is carried out, the same is true, the 1 st optical port and the 3 rd to 8 th optical ports need to be closed firstly during the test, the 2 nd optical port is opened to carry out the GPON ONU and the 10G GPON test, and the like. During testing, only the port to be tested is opened, and other ports are in a closed state during testing, so that the testing is completed in sequence.
Those skilled in the art will appreciate that the various modules or steps of the invention described above can be implemented using a general purpose computing device, that they can be centralized on a single computing device or distributed across a network of computing devices, and that they can alternatively be implemented using program code executable by a computing device, such that the steps illustrated and described herein can be performed by a computing device stored in a memory device and, in some cases, performed in an order different than that used herein, or separately fabricated into various integrated circuit modules, or multiple modules or steps thereof, and implemented as a single integrated circuit module. Thus, the present invention is not limited to any specific combination of hardware and software.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. An optical line terminal testing method is characterized by comprising the following steps:
starting 1 path of optical interfaces of a passive optical network line card of an optical line terminal at one time according to a certain time interval to receive optical signals, and simultaneously closing the optical signal reception of other optical interfaces of the passive optical network line card of the optical line terminal when the optical interfaces receive the optical signals;
the optical signal is transmitted to an optical splitter by two optical network units through an optical combiner, the optical splitter comprises N optical fiber interfaces and a convergence interface, the optical combiner comprises a convergence interface and 2 optical fiber interfaces, the 2 optical fiber interfaces are connected with the two optical network units in a one-to-one manner through optical fiber connectors, the convergence interface is connected with the convergence interface through optical fiber connectors, and the N optical fiber interfaces are connected with optical interfaces of an optical line terminal passive optical network line card in a one-to-one manner through optical fiber connectors;
and testing the passive optical network line card of the optical line terminal according to the condition of receiving the optical signal.
2. An optical line terminal test system comprises a control device, an optical line terminal test device and an optical network unit, wherein:
the optical splitter optical fiber interface of the optical line terminal testing device is connected with the optical interface of the passive optical network line card of the optical line terminal to be tested in a one-to-one manner, and the optical combiner optical fiber interface of the optical line terminal testing device is connected with the optical network unit; the control device is connected with the optical line terminal to be tested;
the control device is used for controlling the optical line terminal to be tested to start 1 path of optical interfaces of the passive optical network line card of the optical line terminal to receive optical signals at a certain time interval, and when the optical interfaces receive the optical signals, other optical interfaces of the passive optical network line card of the optical line terminal are closed to receive optical signals;
the optical line terminal to be tested is used for starting 1 path of optical interface at a time at a certain time interval to receive optical signals, and when the optical interface receives the optical signals, closing the optical signal reception of other optical interfaces at the same time, and testing the passive optical network line card according to the condition of receiving the optical signals;
the optical line terminal testing device comprises an optical combiner and an optical splitter, and is used for transmitting an optical signal sent by an optical network unit to an optical interface of a passive optical network line card, wherein the optical signal is transmitted to the optical splitter by the optical combiner, the optical splitter comprises N optical fiber interfaces and a convergence interface, and N is a natural number greater than 1; the optical combiner comprises a convergence interface and 2 optical fiber interfaces, wherein the 2 optical fiber interfaces of the optical combiner are connected with the two optical network units in a one-to-one mode through optical fiber connectors, the convergence interface is connected with the convergence interface through the optical fiber connectors, and the N optical fiber interfaces of the optical splitter are connected with the optical interfaces of the optical line terminal passive optical network line card in a one-to-one mode through the optical fiber connectors.
3. The olt testing system of claim 2, wherein N is 2, 4, 8, 16, or 32.
4. The olt testing system of claim 3, wherein each of the N optical fiber interfaces of the splitter is coupled to an optical module.
5. The olt testing system of claim 4, wherein each of the N fiber interfaces of the optical splitter is coupled to an optical module via a fiber connector.
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| CN101459473B (en) * | 2007-12-14 | 2012-01-25 | 华为技术有限公司 | Optical beam splitter, optical beam combiner and point-to-multipoint network system |
| CN102055597A (en) * | 2009-11-03 | 2011-05-11 | 中兴通讯股份有限公司 | Stability test platform and method |
| CN102739306B (en) * | 2012-06-11 | 2015-07-01 | 烽火通信科技股份有限公司 | Method for automatically testing optical link in passive optical network |
| CN203301485U (en) * | 2013-06-07 | 2013-11-20 | 广西师范大学 | PON (Passive Optical Network) line fault monitoring device based on optical mark method |
| CN103957052A (en) * | 2014-05-12 | 2014-07-30 | 华为技术有限公司 | Optical fiber fault positioning method, optical module and optical fiber network unit |
| CN105790831B (en) * | 2016-04-20 | 2018-11-23 | 山东信通电子股份有限公司 | PON network equipment bidirectional transmit-receive optical power self-checking device |
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