CN101534163B - Method for testing optical plate and device thereof - Google Patents
Method for testing optical plate and device thereof Download PDFInfo
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- CN101534163B CN101534163B CN200810084953A CN200810084953A CN101534163B CN 101534163 B CN101534163 B CN 101534163B CN 200810084953 A CN200810084953 A CN 200810084953A CN 200810084953 A CN200810084953 A CN 200810084953A CN 101534163 B CN101534163 B CN 101534163B
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Abstract
The invention discloses a method for testing an optical plate, comprising the following steps: a. a network management system issues a testing instruction to a cross plate and the cross plate generates an SDH testing frame signal according to the received instruction and sends the SDH testing frame signal to the optical plate; b. the optical plate receives the testing frame signal sent by the cross plate and transfers the testing frame signal to the cross plate by a service loop; c. the cross plate analyzes the SDH testing frame signal and reports the obtained testing result to the network management system. The invention also discloses a device for testing the optical plate simultaneously; wherein the device comprises the optical plate, the cross plate and the network management system; SDH frame generators and frame monitors are newly added in each testing passage of the cross plate so that the cross plate has the functions of generating the testing frame and analyzing the monitoring frame; and the testing result of the optical plate can be obtained by analyzing the testing frame signal of the optical plate. The method needs no SDH testers, can carry out parallel test to a plurality of optical plates simultaneously, and improves the testing efficiency.
Description
Technical field
The present invention relates to the measuring technology of the optical transmission device of the communications field, relate in particular to a kind of method and device thereof of bare board test.
Background technology
In SDH (SDH) optical transmission system, often need test the tabula rasa of producing and engineering construction is on-the-spot, can satisfy the requirement of optical transport technology index to confirm the tabula rasa product.Said tabula rasa is the abbreviation of Optical Fiber Interface Board.
Fig. 1 is the connected mode sketch map of SDH tester and each tabula rasa in the existing bare board test device; As shown in Figure 1, tested tabula rasa links to each other with the SDH tester through optical fiber, and the receipts optical port of tested tabula rasa connects the luminous port of SDH tester; The luminous port of tested tabula rasa connects the receipts optical port of SDH tester; Business is looped back to tested tabula rasa through cross board, can test indexs such as tabula rasa error code through the SDH tester, confirms that can the tabula rasa product satisfy the requirement of optical transport technology index.If need must the tabula rasa optical port be connected with the SDH tester through mode manual or increase optical port switching device shifter to the polylith tabula rasa, when a plurality of optical port is tested, just can test.But can simplify under the error code testing situation, this conventional test methodologies needs expensive test instrumentation, and needs time-consuming manual operation, so automaticity is not high, and testing efficiency is lower.
Application number is CN200510056484.2; Disclose a kind of SDH of employing tester in the patent application document of denomination of invention for " utilizing false module to realize the method and the device of bare board test " and arrived the multiplexing of two-forty tabula rasa through the low rate tabula rasa; Realize the scheme of the test of two-forty tabula rasa, its method is following: the SDH tester is sent to the normal tabula rasa that has optical module with business through optical fiber; The cross board of configuration SDH will be crossed on the tested tabula rasa that has false optical module through the business after the normal tabula rasa conversion; The optical module of the vacation on the tested tabula rasa is sent to service loop on the normal tabula rasa through cross board, after normal tabula rasa conversion, sends it back the SDH tester through optical fiber, and realization SDH tester is tested tested tabula rasa.This method is through the connection that utilizes false module and utilizes the multiplexing function of cross board to realize that the low rate tabula rasa is multiplexing to the speed of two-forty tabula rasa, and adopts the SDH tester to realize the test of two-forty tabula rasa.But use this method when a large amount of tabula rasas is tested, still to have complicated operating process and the low deficiency of testing efficiency.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of method of bare board test, can test polylith tabula rasa, a plurality of optical port concurrently, improves testing efficiency, thereby reduces testing cost.
Another object of the present invention is to provide a kind of device of bare board test, can test polylith tabula rasa, a plurality of optical port concurrently, improves testing efficiency, thereby reduces testing cost.
For achieving the above object, technical scheme of the present invention is achieved in that
A kind of device of bare board test, this device comprise tabula rasa, cross board and network management system three parts; Said cross board further comprises SDH SDH frame transmitter, SDH frame grabber and channel controller, also comprises SDH frame maker, SDH frame watch-dog on the said cross board; Wherein,
Tabula rasa is used to receive the SDH test frame signal that the SDH frame transmitter of cross board is sent, and with said SDH test frame signal again loopback give the SDH frame grabber of cross board;
Cross board is used to send multichannel SDH test frame signal and receives and analyze SDH test frame signal, then test result is reported network management system;
Network management system is used to control cross board and tabula rasa and carries out test job, and outputs test result and the analysis report of corresponding test result;
SDH frame maker is used for being used for testing the SDH test frame signal of error code according to the instruction generation that network management system is sent out through channel controller, and is sent to SDH frame transmitter;
SDH frame transmitter is used for giving tabula rasa to be measured with the test frame signal forwarding from SDH frame maker;
The SDH frame grabber is used to receive the SDH test frame signal through tabula rasa institute loopback, and the data clock of accomplishing said frame signal recovers, frame synchronization is located and the function of frame alignment, and said frame signal is transmitted to SDH frame watch-dog;
SDH frame watch-dog is used to receive the SDH test frame signal that the SDH frame grabber sent said test frame signal is carried out frame alarm detection and bit error analyzing, and sends test result to channel controller;
Channel controller; The generation of the one or more TCH test channels and the corresponding SDH test frame signal of said cross board is controlled in the order that is used to receive network management system; Simultaneously, also be used for according to the test result and the analytical test result of the SDH frame watch-dog of the instruction of network management system inquiry TCH test channel and report network management system.
A kind of method of bare board test, this method comprises:
A, network management system issue test instruction to cross board, and cross board produces SDH test frame signal and is sent to tabula rasa according to the instruction of being received;
B, tabula rasa receive the test frame signal that cross board sends, through service loop with said test frame signal forwarding to cross board;
C, cross board are analyzed said SDH test frame signal, and resulting test result are reported network management system.
Wherein, the said network management system of step a issues test instruction to cross board, is to accomplish through the channel controller of cross board.
The said cross board of step a produces SDH test frame signal and also is sent to tabula rasa, and the SDH frame maker that is meant cross board produces behind the SDH test frame signal said signal is forwarded to tabula rasa to be measured through the SDH frame transmitter of cross board.
Said test frame signal is a kind of in the SDH synchronous transfer mode STM-N frame signal, wherein: N=1,4,16,64.
Carry the pseudo random sequence PRBS sign indicating number that SDH frame maker is produced in the information payload district of said test frame signal.
The said tabula rasa of step b through service loop with said test frame signal forwarding to cross board; Be SDH test frame signal through receiving by the SDH frame grabber of cross board behind the tabula rasa, and the data clock of accomplishing said frame signal recover, redispatch to the SDH frame watch-dog of cross board after the function of frame synchronization location and frame alignment.
The said cross board of step c is analyzed said SDH test frame signal, is that the SDH frame watch-dog of cross board is analyzed said SDH test frame signal.
The process that said SDH frame watch-dog is analyzed SDH test frame signal is: SDH frame watch-dog carries out synchronous detecting to the PRBS sign indicating number in the said test frame information payload district; If it is asynchronous; Then provide the alarm indication of pseudo random sequence synchronization loss PLOS; As test result, and the detection of end process; If synchronously, then utilize the original PRBS sign indicating number step-by-step in SDH frame watch-dog self PRBS sign indicating number that produces and the SDH test frame that is received to compare, and add up the warning information that comprises information payload error code TSE, as test result.
Step c is said to report network management system with resulting test result, and being test result that the SDH frame watch-dog through cross board is obtained is transmitted to network management system through the channel controller of cross board.
The SDH frame maker of said cross board produces the different STM-N test frame signal of standard speed grade, and the process tabula rasa finally transfers to the SDH frame watch-dog of said cross board, and by said frame watch-dog said test frame signal is analyzed.
The method of realization bare board test provided by the present invention and device thereof have the following advantages:
The present invention makes cross board have the function that produces the SDH test frame through increased SDH frame maker newly in cross board inside; Make cross board possess the function of analysis and control and measuring frame through newly-increased SDH frame watch-dog; To testing through the signal after the tabula rasa sending and receiving, can draw the test result of institute's photometry plate in conjunction with channel controller, network management system, this method does not need expensive SDH tester; Simultaneously; There are a plurality of TCH test channels cross board inside, thereby can walk abreast simultaneously a plurality of tabula rasas are tested, and has improved testing efficiency.
Description of drawings
Fig. 1 is the connected mode sketch map of SDH tester and each tabula rasa in the existing bare board test device;
Fig. 2 is the system configuration sketch map of bare board test device in the embodiment of the invention;
Fig. 3 is the test process sketch map of bare board test in the embodiment of the invention.
Embodiment
Below in conjunction with accompanying drawing and embodiments of the invention method of the present invention is done further detailed explanation.
Fig. 2 is the system configuration sketch map of bare board test device in the embodiment of the invention, and is as shown in Figure 2, and this device comprises tabula rasa 200, cross board 201 and network management system 202.It is TCH test channel 1～TCH test channel n with a plurality of TCH test channels that a cross board 201 includes a channel controller 2015; Each TCH test channel comprises SDH frame maker 2011, SDH frame transmitter 2012, SDH frame grabber 2013, SDH frame watch-dog 2014; Each TCH test channel can connect a tabula rasa to be tested 200.In the practical application, have a plurality of optical ports on the tabula rasa, therefore, a tabula rasa also can connect a plurality of TCH test channels.Wherein,
Cross board 201 is used to send multichannel SDH test frame signal and receives and analyze SDH test frame signal, then test result is reported network management system 202.
Here; Said SDH frame grabber is according to functions such as clock recovery, frame synchronization location, frame alignment and the verifications of B1 byte; Can also provide the test result of test frame signal, as: warning information such as dropout (LOS), OOF alarm (OOF), alarm indication signal (AIS) and B1 byte error code.
Said frame synchronization location is that institute's transmitting data stream is detected, and finds the position of frame head A1, A2, so that current test frame signal is analyzed.
Said frame alignment is the position that the data flow that a plurality of TCH test channels are received snaps to the inner synchronizing frame head of cross board.
The verification of said B1 byte is used for regenerator section bit error is monitored.
SDH frame watch-dog 2014 is used to receive the SDH test frame signal that SDH frame grabber 2013 is sent, and said test frame signal is carried out frame alarm detection and bit error analyzing, and send test result to channel controller 2015.
Here, said SDH test frame signal is carried out frame alarm detection and bit error analyzing, comprise detection and analysis projects such as pseudo random sequence synchronization loss alarm detection such as (PLOS) and information payload error code (TSE) performance evaluation.
Channel controller 2015; The generation of the one or more TCH test channels and the corresponding SDH test frame signal of said cross board 201 is controlled in the order that is used to receive network management system 202; Simultaneously, also be used for according to the test result and the analytical test result of the SDH frame watch-dog 2014 of the instruction of network management system inquiry TCH test channel and report network management system 202.
Fig. 3 is the test process sketch map of bare board test in the embodiment of the invention, and is as shown in Figure 3, and this method comprises:
Step 301: network management system issues test instruction to cross board, and the SDH frame maker of cross board produces SDH test frame signal, and through SDH frame transmitter the test frame signal is sent to tabula rasa.
Here, to produce SDH test frame signal be that the test instruction of the network management system transmitted according to channel controller realizes to the SDH frame maker of said cross board.
The course of work of said SDH frame maker is specially: network management system issues to cross board and is used to make SDH frame maker to produce N (N=1; 4; 16; 64) test instruction of level synchronous transfer mode (STM-N) test frame signal; After the channel controller of said test instruction through cross board is transmitted to SDH frame maker, SDH frame maker will generate the test frame of STM-1, STM-4, STM-16 or STM-64 according to the requirement of said instruction, and in the information payload district of corresponding test frame the input pseudo random sequence (PRBS) that self produced sign indicating number.SDH frame maker is input to the PRBS sign indicating number in the information payload of standard virtual container VC-4 or VC-4-Xc of STM-N and sends.Said STM-N is that SDH signal standards speed grade: STM-1 is 155.520Mbps, and STM-4 is 622.080Mbps, and STM-16 is that 2488.320Mbps, STM-64 are 9553.280Mbps.
Here, said PRBS sign indicating number is to be produced through linear feedback shift register (LFSR) by SDH frame maker, and the length of its PRBS sign indicating number is 2
23-1.
Step 302: tabula rasa receives the test frame signal that the SDH frame transmitter of cross board sends over, through the SDH frame grabber of service loop with said test frame signal forwarding to cross board.
Here, said service loop can be the signal of telecommunication Loopback Mode of tabula rasa inside chip, also can be the light signal Loopback Mode of the optical port of tabula rasa through the optical patchcord connection.
Said SDH frame grabber carries out functions such as data clock recovery, frame synchronization location, frame alignment to the SDH test frame, so that be the test frame signal that SDH frame watch-dog is provided for further detecting and analyzing error performance.
Step 303:SDH frame watch-dog is analyzed the test frame signal that the SDH frame grabber is brought, and gives network management system with the test result of gained through controller report.
Here, be preset with in the said SDH frame watch-dog with SDH frame maker in identical LFSR, being used to produce code length is 2
23-1 PRBS sign indicating number is so that SDH frame watch-dog compares the PRBS sign indicating number in the test frame signal that is received.
Said SDH frame watch-dog is analyzed the SDH test frame of bringing through the SDH frame grabber; Be specially: SDH frame watch-dog is monitored the VC-4 of SDH test frame STM-N or the PRBS sign indicating number in the VC-4-Xc information payload district; Promptly the PRBS sign indicating number of being imported is carried out synchronous detecting,, just provide the alarm indication of PLOS if asynchronous; As test result, and the detection of end process; If synchronously; Then start LFSR and produce the PRBS sign indicating number; Utilize PRBS sign indicating number that SDH frame watch-dog produced and original PRBS sign indicating number step-by-step in the SDH test frame that is received to compare then, and the number of the PRBS sign indicating number that makes a mistake of statistics is relevant warning information such as TSE, as test result.
In the present embodiment, select the information payload district of PRBS sign indicating number input SDH test frame in the SDH frame maker for use, and in SDH frame watch-dog, receive and the transmission performance analysis of focalization plate is a kind of preferred version.Can also select for use other sign indicating number type to test in actual the use, if this sign indicating number is satisfied send to receiving terminal from transmitting terminal after, receiving terminal can step-by-step compare also can add up make a mistake yard number get final product.
Here, said test result comprises warning information such as LOS, OOF, AIS, B1 byte error code, PLOS, TSE.
Like this, just can judge through test result and fault location information that network management system showed whether each item index of the current tabula rasa of testing satisfies the needs of communications.
Because each piece cross board all comprises the multi-channel test passage; Have a plurality of optical ports on the tabula rasa; That is to say that a cross board can connect a plurality of tabula rasas simultaneously; Therefore, use bare board test scheme of the present invention concurrently focalization plate test, this has improved the testing efficiency of focalization plate greatly.The TCH test channel of said cross board can be without cross-coupled direct-connected transmission channel; Also can be through the interconnection transmission channel after the configuration, if utilize the cross connect function of cross board then can realize in test that the optical port handoff functionality makes test process become more flexible.
The above is merely preferred embodiment of the present invention, is not to be used to limit protection scope of the present invention.
Claims (11)
1. the device of a bare board test, this device comprises tabula rasa, cross board and network management system three parts; Said cross board further comprises SDH SDH frame transmitter, SDH frame grabber and channel controller, it is characterized in that, also comprises SDH frame maker, SDH frame watch-dog on the said cross board; Wherein,
Tabula rasa is used to receive the SDH test frame signal that the SDH frame transmitter of cross board is sent, and with said SDH test frame signal again loopback give the SDH frame grabber of cross board;
Cross board is used to send multichannel SDH test frame signal and receives and analyze SDH test frame signal, then test result is reported network management system;
Network management system is used to control cross board and tabula rasa and carries out test job, and outputs test result and the analysis report of corresponding test result;
SDH frame maker is used for being used for testing the SDH test frame signal of error code according to the instruction generation that network management system is sent out through channel controller, and is sent to SDH frame transmitter;
SDH frame transmitter is used for giving tabula rasa to be measured with the test frame signal forwarding from SDH frame maker;
The SDH frame grabber is used to receive the SDH test frame signal through tabula rasa institute loopback, and the data clock of accomplishing said frame signal recovers, frame synchronization is located and the function of frame alignment, and said frame signal is transmitted to SDH frame watch-dog;
SDH frame watch-dog is used to receive the SDH test frame signal that the SDH frame grabber sent said test frame signal is carried out frame alarm detection and bit error analyzing, and sends test result to channel controller;
Channel controller; The generation of the one or more TCH test channels and the corresponding SDH test frame signal of said cross board is controlled in the order that is used to receive network management system; Simultaneously, also be used for according to the test result and the analytical test result of the SDH frame watch-dog of the instruction of network management system inquiry TCH test channel and report network management system.
2. the method for a bare board test is characterized in that, this method comprises:
A, network management system issue test instruction to cross board, and cross board produces SDH test frame signal and is sent to tabula rasa according to the instruction of being received;
B, tabula rasa receive the test frame signal that cross board sends, through service loop with said test frame signal forwarding to cross board;
C, cross board are analyzed said SDH test frame signal, and resulting test result are reported network management system.
3. method according to claim 2 is characterized in that, the said network management system of step a issues test instruction to cross board, is to accomplish through the channel controller of cross board.
4. method according to claim 2; It is characterized in that; The said cross board of step a produces SDH test frame signal and also is sent to tabula rasa, and the SDH frame maker that is meant cross board produces behind the SDH test frame signal said signal is forwarded to tabula rasa to be measured through the SDH frame transmitter of cross board.
5. method according to claim 4 is characterized in that, said test frame signal is a kind of in the SDH synchronous transfer mode STM-N frame signal, wherein: N=1,4,16,64.
6. method according to claim 5 is characterized in that, carries the pseudo random sequence PRBS sign indicating number that SDH frame maker is produced in the information payload district of said test frame signal.
7. method according to claim 2; It is characterized in that; The said tabula rasa of step b through service loop with said test frame signal forwarding to cross board; Be SDH test frame signal through receiving by the SDH frame grabber of cross board behind the tabula rasa, and the data clock of accomplishing said frame signal recover, redispatch to the SDH frame watch-dog of cross board after the function of frame synchronization location and frame alignment.
8. method according to claim 2 is characterized in that, the said cross board of step c is analyzed said SDH test frame signal, is that the SDH frame watch-dog of cross board is analyzed said SDH test frame signal.
9. method according to claim 8; It is characterized in that; The process that said SDH frame watch-dog is analyzed SDH test frame signal is: SDH frame watch-dog carries out synchronous detecting to the PRBS sign indicating number in the said test frame information payload district, if asynchronous, then provides the alarm indication of pseudo random sequence synchronization loss PLOS; As test result, and the detection of end process; If synchronously, then utilize the original PRBS sign indicating number step-by-step in SDH frame watch-dog self PRBS sign indicating number that produces and the SDH test frame that is received to compare, and add up the warning information that comprises information payload error code TSE, as test result.
10. method according to claim 2 is characterized in that, step c is said to report network management system with resulting test result, and being test result that the SDH frame watch-dog through cross board is obtained is transmitted to network management system through the channel controller of cross board.
11. method according to claim 2; It is characterized in that; The SDH frame maker of said cross board produces the different STM-N test frame signal of standard speed grade; The process tabula rasa finally transfers to the SDH frame watch-dog of said cross board, and by said frame watch-dog said test frame signal is analyzed.
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| CN200810084953A CN101534163B (en) | 2008-03-10 | 2008-03-10 | Method for testing optical plate and device thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101895362A (en) * | 2010-07-27 | 2010-11-24 | 中兴通讯股份有限公司 | Service loopback method and device for synchronizing digital system |
| CN102647228B (en) * | 2012-03-31 | 2014-08-06 | 瑞斯康达科技发展股份有限公司 | Method, device and system for detecting SDH (Synchronous Digital Hierarchy) card |
| CN102611499B (en) * | 2012-04-05 | 2015-01-14 | 烽火通信科技股份有限公司 | Method for realizing ODUK (Optical Channel Data Unit) protection switching by crossed disc of OTN (Optical Transport Network) equipment |
| CN105988073A (en) * | 2015-02-12 | 2016-10-05 | 中兴通讯股份有限公司 | Detection device, detection system and single board |
| CN105634644B (en) * | 2015-12-25 | 2017-12-29 | 潘岭 | A kind of detection method and system of SDH transmission |
| US10236975B2 (en) * | 2017-02-10 | 2019-03-19 | Intel Corporation | Programmable photonic-electronic integrated circuit for optical testing |
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| CN1838619A (en) * | 2005-03-24 | 2006-09-27 | 中兴通讯股份有限公司 | Method for realizing bare board test using false module and its device |
| CN101110641A (en) * | 2007-08-08 | 2008-01-23 | 中兴通讯股份有限公司 | Loopback optical receiving-transmitting module and its testing device and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1838619A (en) * | 2005-03-24 | 2006-09-27 | 中兴通讯股份有限公司 | Method for realizing bare board test using false module and its device |
| CN101110641A (en) * | 2007-08-08 | 2008-01-23 | 中兴通讯股份有限公司 | Loopback optical receiving-transmitting module and its testing device and method |
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