CN115314105B

CN115314105B - BOB test system

Info

Publication number: CN115314105B
Application number: CN202210790083.3A
Authority: CN
Inventors: 李红日
Original assignee: Jiangsu Xinertai Intelligent Equipment Co ltd
Current assignee: Jiangsu Xinertai Intelligent Equipment Co ltd
Priority date: 2022-07-06
Filing date: 2022-07-06
Publication date: 2023-07-21
Anticipated expiration: 2042-07-06
Also published as: CN115314105A

Abstract

The application relates to a BOB test system comprising a full-duplex multitasking subsystem, a local instrument set and an eye-diagram instrument cloud; for testing at least two BOBs simultaneously; the full duplex multitasking subsystem is connected with the local instrument set and the eye diagram instrument cloud in a bidirectional manner; the full duplex multiplexing subsystem has a bi-directional connection with at least two BOBs under test. The BOB test system has the advantages that the BOB test light path and the 1*N flow light path of the traditional test scheme are integrated into the same test system through the full-duplex multitasking light subsystem, so that the BOB test and the 1*N flow test are compatible in the test system, and the effect of an independent flow test procedure is avoided.

Description

BOB test system

Technical Field

The application relates to the field of BOB testing technology, in particular to a BOB testing system.

Background

The ONT BOB test schemes currently on the market require multiple test procedures to complete the BOB test. In general, BOB tuning, eye diagram testing, and flow testing may require different testing procedures to complete. There are many times of turnover, many times of power-up, many times of operations such as optical fiber connection, the test line body is longer, and test efficiency is lower, and the line body needs to dispose more testers.

The current market mainstream BOB service test adopts an error code card, the PRBS code stream is inserted under the error code card, and the PRBS code stream is detected at the ONT. Because the PRBS code stream inserted under the error code card does not contain the content of the protocol layer, the PRBS code stream can only be detected at the physical layer of the ONT and cannot cover the complete service link of the ONT. Meanwhile, as the uplink and downlink rates of the ONTs are asymmetric, the common error code instrument has the same uplink and downlink rates and cannot be compatible with uplink and downlink service tests. The general service test can only cover the service in the downlink direction, and the BOB uplink direction service can not cover the service. Meanwhile, the service test depends on the PRBS function of the service processing chip of the ONT, and if the PRBS function of the service processing chip cannot be opened, the related service test cannot be realized.

To sum up, the current BOB test procedure cannot achieve complete service coverage, so a special traffic procedure must be added to cover complete service paths and directions. The main stream BOB test system in the current market only provides a BOB adjusting and testing light path, and cannot support a 1*N flow testing light path. 1*N flow testing requires a separate process. Meanwhile, the eye pattern instrument generally adopts a non-sharing mode, so that the utilization rate is increased greatly.

Disclosure of Invention

In order to solve the technical problem of low efficiency of the BOB test procedure, the application provides a BOB test system.

The application provides a BOB test system, adopts following technical scheme:

a BOB test system comprising a full-duplex multitasking subsystem, a local instrument set, and an eye-diagram instrument cloud; for testing at least two BOBs simultaneously;

the full duplex multitasking subsystem is connected with the local instrument set and the eye diagram instrument cloud in a bidirectional manner;

the full duplex multiplexing subsystem has a bi-directional connection with at least two BOBs under test.

Preferably, the full duplex multiplexing subsystem comprises:

the system comprises at least two BOB full duplex test light paths, a local meter set and a light path attenuation adjustment, wherein the at least two BOB full duplex test light paths are used for realizing light path connection from the at least two BOBs to be tested to the local meter set, power detection from the at least two BOBs to the local meter set direction, and power detection from the local meter set to the at least two BOB directions;

1*N eye path selection light path for selecting one of the test signals of at least two BOBs for eye test; the 1*N eye path selection light path is in bidirectional connection with the at least two BOB full-duplex test light paths and in bidirectional connection with the eye instrument cloud;

the multi-task switching optical path is used for supporting parallel testing of at least two BOBs to be tested; the multi-task switching optical path is in bidirectional connection with the at least two BOB full duplex test optical paths and the at least two BOBs.

Preferably, the flow meter further comprises a 1*N flow test light path;

the 1*N flow test light path is used for realizing flow test from at least two BOBs to the direction of the local instrument set, and the flow test from the local instrument set to the direction of at least two BOBs; the 1*N flow test light path is in bidirectional connection with the local instrument set and the multitask switching light path.

Preferably, the BOB full-duplex test optical path includes: an uplink test light path module, a downlink test light path module and a combining and splitting module;

the input end and the output end of the uplink test light path module are respectively connected with the 1270/1310nm output end and the 1270/1310nm input end of the multiplexing/demultiplexing and light splitting module;

the input end and the output end of the downlink test light path module are respectively connected with the 1490/1577nm output end and the 1490/1577nm input end of the multiplexing/demultiplexing and light splitting module;

the combining and splitting module is used for realizing the branching and combining of the uplink and downlink optical signals and preventing the mutual interference of the uplink and downlink optical signals.

Preferably, the uplink test optical path module includes: a first integrated power meter and optical splitter;

the optical splitter is used for splitting the uplink 1270/1310nm optical signal decomposed by the combining and splitting module into at least four branches;

the first integrated power meter receives the optical splitter and divides the optical splitter into at least one of four branches, and is used for testing the sending optical power of the optical signal of 1270/1310nm in the uplink direction.

Preferably, the downlink test optical path module includes: a tunable optical attenuator and a second integrated power meter;

the adjustable optical attenuator is used for attenuating the 1490/1577nm downlink optical signals, so that the attenuated 1490/1577nm downlink optical signals meet the test power requirement of a BOB receiving end;

and the second integrated power meter is used for receiving the 1490/1577nm downlink optical signal attenuated by the adjustable optical attenuator and testing optical power.

Preferably, the local meter set includes: a extinction ratio meter, a code error meter or a flow card.

Preferably, the eye pattern instrument cloud adopts an instrument cloud mode to realize that at least two stations share one eye pattern instrument.

In summary, the present application includes at least one of the following beneficial technical effects:

1. through a set of full duplex multitask light path subsystem, can be with the BOB of traditional test scheme transfer and survey the light path and 1*N flow light path is integrated to same test system, just so can compatible BOB transfer and survey and 1*N flow test in a set of test system, avoid solitary flow test process.

2. The test system supports BOB test to perform service test by adopting the flow card, can cover complete uplink and downlink service links at one time, and avoids the need of using 1*N flow to perform service test after the error code card performs service test.

3. The eye diagram instrument cloud scheme is adopted in the testing system, the eye diagram instrument is shared among multiple stations, one-station testing is supported, and the eye diagram instrument is used as required, so that the maximum utilization rate is realized.

Drawings

FIG. 1 is a block diagram of a BOB test system;

FIG. 2 is a diagram of a first embodiment of a full duplex multiplexing subsystem;

FIG. 3 is a diagram of a first embodiment of a full duplex multiplexing subsystem;

FIG. 4 is a logic diagram of BOB full duplex test optical path configuration;

FIG. 5 is a logic diagram of an upstream test optical path module configuration;

fig. 6 is a logic diagram of the downstream test optical path module configuration.

Reference numerals illustrate:

1. a full duplex multitasking subsystem; 2. a local instrument collection;

3. eye diagram instrument cloud; 4. BOB;

101. the BOB full-duplex test optical path 102, 1*N eye channel select optical path;

103. multitasking switches the light path; 104. 1*N flow test light path;

1011. an uplink test light path module; 1012. a downlink test light path module;

1013. a combining and splitting module;

10111. a first integrated power meter; 10112. a beam splitter;

10121. a variable optical attenuator; 10122. a second integrated power meter;

201. a extinction ratio meter; 202. a code error meter;

203. a flow meter.

Detailed Description

Term interpretation:

BOSA: bidirectional optical transceiver (Bidirectional Optical Sub-assembly BOSA)

BOB: and the BOSA On Board is arranged On the bidirectional optical transceiver component On the circuit Board.

ONT: optical Network Terminal an optical network terminal commonly called as an optical cat; the optical signals received from the network receive voice data and video and are transmitted in corresponding formats to residential and commercial users.

And (3) an OLT: optical Line Termination, the fiber-optic line termination, also known as an optical transceiver.

Eye diagram: the persistence effect of the oscilloscope is used for overlapping each symbol waveform obtained by scanning, so that an eye diagram is formed.

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail with reference to fig. 1 to 6 and the embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.

Today, new services such as mobile internet and internet of things are gradually popularized, a broadband network becomes an indispensable carrier for information consumption, a cat becomes a main data access device of an operator, and the annual delivery of ONTs (cat) in China reaches tens of millions. The huge market demand, it becomes important for manufacturers of light cats to increase production efficiency.

The main stream of ONT devices currently consists of the following features:

and the first optical fiber and the single optical fiber transmit uplink and downlink services which adopt different wavelengths. For example, GPON downlink 1490/1577nm and uplink 1270/1310nm;

and second, the uplink and downlink service rates are asymmetric. For example, the main stream of GPON is downlink 2.5Gbps and uplink 1.25Gbps.

In order to reduce the cost, currently, the ONT generally adopts BOB (BOSA ON BOARD), and various devices in the original optical module are directly welded on the PCB of the ONT.

The BOB test system provided by the application, as shown in fig. 1, adopts the following technical scheme:

a BOB test system comprising a full-duplex multitasking subsystem 1, a local instrument set 2, and an eye-diagram instrument cloud 3; for testing at least two BOBs 4 simultaneously; the test system can test a plurality of BOB 4 at the same time, greatly improves the test efficiency and reduces the test cost. The method of time sharing of the eye pattern meters is realized by integrating a plurality of local meters together and realizing low cost and high efficiency.

The full duplex multitasking subsystem 1 is connected with the local instrument set 2 and the eye diagram instrument cloud 3 in a bidirectional manner;

the full duplex multiplexing subsystem 1 has a bi-directional connection with at least two BOBs 4 under test. The full duplex multiplexing subsystem 1 of the present technical solution is located between the local instrument set 2 and the at least two BOBs 4 under test, and also between the eye-diagram instrument cloud 3 and the at least two BOBs 4 under test.

Preferably, as shown in fig. 2, the full duplex multiplexing subsystem 1 includes:

at least two BOB full duplex test optical paths 101 for implementing optical path connection from the at least two BOBs 4 to be tested to the local meter set 2, power detection from the at least two BOBs 4 to the local meter set 2, power detection from the local meter set 2 to the at least two BOBs 4, and optical path attenuation adjustment; any full duplex multi-task subsystem 1 is mainly used for establishing a test light path meeting test conditions between an instrument and a BOB 4 for testing, and also supports a power test function of a receiving end and a transmitting end. The plurality of BOB full duplex test light paths 101 are arranged together, so that the test efficiency can be improved, and the test cost can be reduced.

1*N eye path selection path 102 for selecting one of the test signals of at least two BOBs 4 for eye testing; the 1*N eye path selecting optical path 102 is in bidirectional connection with the at least two BOB full-duplex test optical paths 101 and in bidirectional connection with the eye meter cloud 3; the 1*N eye path selecting optical path 102 mainly comprises a 1*N optical switch, and includes N input ports and an output port, where the N input ports are respectively connected to eye test signals of the BOB full-duplex test optical path 101, and the output port is connected to a test optical path of the external eye meter cloud 3. The method mainly aims at selecting one path from test signals of N paths of BOB test pieces to conduct eye pattern test.

A multiplexed switched optical path 103 for supporting parallel testing of at least two BOBs 4 under test; the multi-task switching optical path 103 is in bidirectional connection with the at least two BOB full-duplex test optical paths 101 and the at least two BOBs 4. The multiplexing optical switching circuit 103 integrates multiple groups of 2 x 2 optical switches. Each 2 x 2 optical switch has two input ports and two output ports, and two BOB test pieces are connected respectively to the input ports, and one of the output ports is connected to the BOB full duplex test optical path 101, and the other port is connected to the branching end of the 1*N flow test optical path 104. By multiplexing the switching light paths 103, the number of the multiple systems simultaneously accessing the tested pieces can be increased, and meanwhile, the selective switching of the multiple tested pieces between the BOB test and the 1*N flow test tasks can be supported. Through the multi-task switching optical path 103, the test system can support multi-path BOB test piece parallel test of the test piece and multi-path flow parallel test.

Preferably, as shown in fig. 3, further comprises a 1*N flow test light path 104;

the 1*N flow test optical path 104 is configured to implement flow tests from at least two BOBs 4 to the local meter set 2, and flow tests from the local meter set 2 to at least two BOBs 4; the 1*N flow test light path 104 is in bidirectional connection with the local instrument set 2 and the multiplexing switching light path 103. The 1*N flow test optical path 104 is integrated with 1*N optical splitters, a public end is connected with a flow card and the OLT, and N optical splitting ports are connected to N multiplexing switching optical paths 103. The flow test code stream sent by the OLT during the test is input from the public end, is distributed to N optical splitting ends in parallel, is connected to corresponding BOB tested pieces through the multi-task switching optical path 103, and realizes the flow test in the downlink direction. Meanwhile, the uplink flow test code stream of each BOB tested piece is input from each light splitting port, output from the public end and enters the OLT and the flow card, so that the uplink flow test can be realized.

Preferably, as shown in fig. 4, the BOB full-duplex test optical path 101 includes: an uplink test optical path module 1011, a downlink test optical path module 1012, and a combining/splitting module 1013; the adjusting and measuring light path of each BOB measured piece can simultaneously support BOB parameter adjusting and measuring and service testing of 1 measured piece. The full duplex test optical path 101 can be configured with a plurality of full duplex BOB modulation optical paths according to the requirement, and supports parallel test of a plurality of BOB tested pieces.

The input end and the output end of the uplink test light path module 1011 are respectively connected with the 1270/1310nm output end and the 1270/1310nm input end of the combining and splitting module 1013; the input end and output end of the uplink test light path module are connected with the 1270/1310nm output end and input port of the combining and splitting module 1013, the first integrated power meter 10111 and the splitter 10112 are integrated, the transmission light power of the BOB tested piece in the uplink direction is mainly tested, meanwhile, the splitter 10112 is integrated, the uplink direction light signal decomposed by the combining and splitting module 1013 is divided into a plurality of branches, one path of light signal is output and connected with the extinction ratio meter 201 for performing the extinction ratio test, the other path of light signal is output and connected with the eye diagram meter cloud 3 after being selected by the 1*8 switch, and the other path of light signal is finally output to the receiving end of the OLT for receiving and testing the service. The beam-splitting optical path can control the insertion loss of the uplink optical path to a proper range through a proper beam-splitting ratio, so that the receiving power of the service instrument falls in a proper power interval during uplink service test.

The input end and the output end of the downlink test light path module 1012 are respectively connected with the 1490/1577nm output end and the 1490/1577nm input end of the combining and splitting module 1013; the input end and the output end of the downlink test light path are connected with the 1490/1577nm output end and the input port of the combining and splitting module 1013, and the integrated adjustable optical attenuator 10121 and the second integrated power meter 10122 are mainly used for attenuating the 1490/1577nm downlink light signal output by the OLT or the error code meter, and the second integrated power meter 10122 is used for testing the attenuated light power so as to enable the attenuated light power to meet the requirements of the power calibration of the receiving end of the BOB tested piece and the RSSI parameter adjustment power and output the attenuated light power to the receiving end of the BOB for receiving. Meanwhile, the downlink service code stream of the error code meter 202 or the flow meter 203 can be adjusted to an overload point or a sensitivity point through a downlink test light path, so that overload or sensitivity service test is completed.

The combining and splitting module 1013 is configured to implement splitting and combining of the uplink and downlink optical signals, and prevent mutual interference between the uplink and downlink optical signals. The combining and splitting module 1013 mainly realizes the splitting and combining of 1270/1310nm signals of an uplink optical path and 1490/1577nm optical signals of a downlink optical path in the BOB full-duplex test optical path 101, prevents the uplink optical signal and the downlink optical signal from interfering with each other, and realizes the full-duplex test of the uplink optical path and the downlink optical path.

Preferably, as shown in fig. 5, the uplink test optical path module 1011 includes: a first integrated power meter 10111 and a beam splitter 10112;

the optical splitter 10112 is configured to split the optical signal of 1270/1310nm in the uplink direction decomposed by the combining and splitting module 1013 into at least four branches;

the first integrated power meter 10111 receives the optical splitter 10112 and divides the optical splitter 10112 into at least four branches, and is used for testing the transmission optical power of the optical signal in the uplink direction 1270/1310 nm.

Preferably, as shown in fig. 6, the downstream test optical path module 1012 includes: a tunable optical attenuator 10121 and a second integrated power meter 10122;

the adjustable optical attenuator 10121 attenuates the 1490/1577nm downlink optical signal, so that the attenuated 1490/1577nm downlink optical signal meets the power requirement of the BOB 4 receiving end;

the second integrated power meter 10122 receives the 1490/1577nm downlink optical signal attenuated by the adjustable optical attenuator 10121, and is used for testing optical power.

Preferably, the local meter set 2 includes: a extinction ratio meter 201, an error meter 202 or a flow card 203. The BOB adjustment instrument comprises an extinction ratio instrument 201, a code error instrument 202 or a flow card 203 and an OLT, and is mainly matched with a BOB test light path to test the extinction ratio of the emitting end of a BOB tested piece, and provides a test light source for power calibration and RSSI adjustment in the downlink direction while up-down service (the code error card can only test down service, and the flow card 203 and the OLT can cover up-down service). The networking test instrument comprises a flow card 203 and an OLT, and is mainly matched with a 1*N networking light path, so that the networking mode uplink and downlink flow test can be realized. In general, if the BOB measurand service test employs the traffic card 203 and OLT schemes, the traffic test optical path 104 and corresponding local meters may not be configured 1*N.

Preferably, the eye pattern instrument cloud 3 adopts an instrument cloud mode to realize that at least two stations share one eye pattern instrument. The optical path is mainly matched with a BOB (Brillouin optical fiber) modulation and measurement optical path and is used for testing the eye pattern index of the DUT. Because the eye pattern instrument is more noble, and each BOB measured piece needs to occupy the eye pattern instrument for a short time, if an eye pattern instrument cloud 3 mode is adopted, a plurality of stations can share the eye pattern instrument, and the maximum utilization rate of the eye pattern instrument is realized.

The foregoing description of the preferred embodiments of the present application is not intended to limit the scope of the application, in which any feature disclosed in this specification (including abstract and drawings) may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise. That is, each feature is one example only of a generic series of equivalent or similar features, unless expressly stated otherwise.

Claims

1. A BOB test system, characterized by: the system comprises a full-duplex multitasking subsystem (1), a local instrument set (2) and an eye diagram instrument cloud (3); for simultaneously testing at least two BOBs (4);

the full duplex multitasking subsystem (1) is connected with the local instrument set (2) and the eye diagram instrument cloud (3) in a bidirectional manner;

the full duplex multitasking subsystem (1) is in bidirectional connection with at least two BOBs (4) to be tested;

the full duplex multiplexing subsystem (1) comprises:

at least two BOB full duplex test light paths (101) for realizing light path connection of the at least two BOBs (4) to be tested to the local instrument set (2), power detection of the at least two BOBs (4) to the local instrument set (2) direction, power detection of the local instrument set (2) to the at least two BOBs (4) direction, and light path attenuation adjustment;

1*N eye path selection optical path (102) for selecting one of the test signals of at least two BOBs (4) for eye testing; the 1*N eye path selection optical path (102) is in bidirectional connection with the at least two BOB full-duplex test optical paths (101) and in bidirectional connection with the eye meter cloud (3); the 1*N eye path selection light path (102) mainly comprises a 1*N optical switch, and comprises N input ports and an output port, wherein the N input ports are respectively connected to eye test signals of the BOB full duplex test light path (101), and the output port is connected to a test light path of an external eye instrument cloud (3);

a multiplexed switched optical path (103) for supporting parallel testing of at least two BOBs (4) under test; the multi-task switching optical path (103) is in bidirectional connection with the at least two BOB full-duplex test optical paths (101) and the at least two BOBs (4); the multitasking switching optical path (103) integrates a plurality of groups of 2 x 2 optical switches; each 2 x 2 optical switch is provided with two input ports and two output ports, the input ports are respectively connected with two BOB test pieces, one output port is connected to a BOB full duplex test optical path (101), and the other port is connected to a branching end of a 1*N flow test optical path (104); through the multitasking switching optical path (103), the number of the tested pieces which are simultaneously accessed by the multitasking system can be increased, and meanwhile, the selective switching of a plurality of tested pieces between BOB testing and 1*N flow testing tasks can be supported;

the 1*N flow test light path (104) is used for realizing flow test from at least two BOBs (4) to the direction of the local instrument set (2), and flow test from the direction of the local instrument set (2) to at least two BOBs (4); the 1*N flow test light path (104) is in bidirectional connection with the local instrument set (2) and the multitask switching light path (103); the 1*N flow test light path (104) is integrated with the 1*N optical splitter, a public end is connected with the flow card and the OLT, and N optical splitting ports are connected to N multitasking switching light paths (103); the flow test code stream sent by the OLT during test is input from the public end, is distributed to N optical splitting ends in parallel, is connected to corresponding BOB tested pieces through a multi-task switching optical path (103) and realizes the flow test in the downlink direction; meanwhile, the uplink flow test code stream of each BOB tested piece is input from each light splitting port, output from the public end and enter the OLT and the flow card, so that the uplink flow test can be realized;

the local instrument set (2) comprises: a extinction ratio meter (201), an error code meter (202) or a flow card (203).

2. The test system of claim 1, wherein the BOB full-duplex test optical path (101) comprises: an uplink test optical path module (1011), a downlink test optical path module (1012) and a combining and splitting module (1013);

the input end and the output end of the uplink test light path module (1011) are respectively connected with the 1270/1310nm output end and the 1270/1310nm input end of the combining and splitting module (1013);

the input end and the output end of the downlink test light path module (1012) are respectively connected with the 1490/1577nm output end and the 1490/1577nm input end of the combining and splitting module (1013);

the combining and splitting module (1013) is configured to implement splitting and combining of the uplink and downlink optical signals, and prevent mutual interference between the uplink and downlink optical signals.

3. The test system of claim 2, wherein the upstream test optical path module (1011) comprises: a first integrated power meter (10111) and a beam splitter (10112);

the optical splitter (10112) is configured to split the optical signal of 1270/1310nm in the uplink direction decomposed by the combining and splitting module (1013) into at least four branches;

the first integrated power meter (10111) receives the optical splitter (10112) and divides the optical splitter into one of at least four branches, and the one branch is used for testing the transmission optical power of the optical signal of 1270/1310nm in the uplink direction.

4. The test system of claim 2, wherein the downstream test light path module (1012) comprises: a tunable optical attenuator (10121) and a second integrated power meter (10122);

the adjustable optical attenuator (10121) attenuates the 1490/1577nm downlink optical signal, so that the attenuated 1490/1577nm downlink optical signal meets the test power requirement of a BOB (4) receiving end;

the second integrated power meter (10122) receives the 1490/1577nm downlink optical signal attenuated by the adjustable optical attenuator (10121) and is used for testing optical power.

5. The test system according to claim 1, wherein the eye diagram instrument cloud (3) is configured to implement sharing of an eye diagram instrument by at least two stations in an instrument cloud manner.