CN106160848A - The error-code testing method of a kind of multichannel system, device and system - Google Patents
The error-code testing method of a kind of multichannel system, device and system Download PDFInfo
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Abstract
The invention discloses the error-code testing method of a kind of multichannel system, emitter enables channel to be measured, forbids other channels, sends single channel test signal at channel to be measured, and receiver carries out Error detection to described single channel test signal；The present invention also discloses error code testing device and the system of a kind of multichannel system.
Description
Technical Field
The present invention relates to optical communication technologies, and in particular, to a method, an apparatus, and a system for testing an error code of a multi-channel system.
Background
With the increasing demand for bandwidth and the advancement of technology, the rate of optical communication is higher and higher, for example, the rate evolution of ethernet interface is known to be 1Gb/s- >10Gb/s- >40Gb/s- >100Gb/s- >400Gb/s, and then may be 800Gb/s, 1Tb/s, 1.6Tb/s, etc. High rate interfaces are typically implemented using a multi-channel (multi lane) scheme, e.g., a 40Gb/s optical interface of 4 × 10Gb/s, and 100Gb/s of 4 × 25Gb/s or 10 × 10 Gb/s. The multi-channel system can adopt a parallel multimode or single-mode optical fiber scheme, and also can adopt a wavelength division multiplexing technical scheme.
Parameters such as receiver sensitivity are important test items of an optical module, and when testing the parameters of a multi-channel system of a wavelength division multiplexing technology, each channel is often separated by using a multiplexer/demultiplexer. Part 2 of the pluggable optical transceiver module is modulated by the intensity of 40Gbps/100Gbps in China communication industry standard: 4 × 25Gbps ], as shown in fig. 1, is a block diagram for testing the sensitivity of a 100G client-side optical module receiver, and divides optical signals into 4 paths of 25G signals by using an optical wavelength division demultiplexer, and then combines the signals by using an optical wavelength division multiplexer, and configures an optical variable attenuator in a channel to be tested, and other channels are directly connected; by adjusting the optical variable attenuator of the channel to be detected, the receiver sensitivity of the channel to be detected can be obtained by monitoring the error rate of the system to reach a design reference value, and the receiver sensitivity of other channels can be obtained by repeating the steps.
However, the disadvantages of the existing test method using the multiplexer/demultiplexer are: the configuration is complex, the cost is high, the extra insertion loss is introduced into the wavelength division multiplexer, and the optical variable attenuator is added, so that the power budget of the test system is limited, the test error is inevitably introduced, and the difficulty in realizing the automatic test is also high.
Disclosure of Invention
In order to solve the existing technical problems, the invention mainly provides a method, a device and a system for testing error codes of a multi-channel system.
The technical scheme of the invention is realized as follows:
the invention provides an error code testing method of a multi-channel system, which comprises the following steps:
enabling a channel to be tested by the transmitter, and forbidding other channels;
and the transmitter sends a single-channel test signal on the channel to be tested.
In the foregoing solution, the sending, by the transmitter, the single-channel test signal on the channel to be tested includes: the transmitter shields a framing signal, generates a single-channel test signal based on the pseudo-random sequence, and transmits the single-channel test signal on a channel to be tested.
The invention provides an error code testing method of a multi-channel system, which comprises the following steps:
the receiver receives a single-channel test signal at a channel to be tested;
and the receiver carries out error code detection on the single-channel test signal.
In the above scheme, the performing, by the receiver, error detection on the single-channel test signal includes: and the receiver carries out error code detection on the single-channel test signal on the channel to be detected based on the test sequence.
The invention provides an error code testing method of a multi-channel system, which comprises the following steps:
enabling a channel to be tested by the transmitter, and forbidding other channels;
the transmitter sends a single-channel test signal on a channel to be tested;
the receiver receives a single-channel test signal at a channel to be tested;
and the receiver carries out error code detection on the single-channel test signal.
In the above scheme, the sending, by the transmitter, the single-channel test signal on the channel to be tested includes: the transmitter shields a framing signal, generates a single-channel test signal based on the pseudo-random sequence, and transmits the single-channel test signal on a channel to be tested.
In the above scheme, the performing, by the receiver, error detection on the single-channel test signal includes: and the receiver carries out error code detection on the single-channel test signal on the channel to be detected based on the test sequence.
In the above scheme, the method further comprises:
after the receiver carries out error code detection on the single-channel test signal, the current error code rate is sent to the management equipment;
the management equipment controls the optical variable attenuator to adjust the power so that the current error rate reaches a reference error rate;
the optical power meter measures the input optical power of the current receiver and records the input optical power as the receiver sensitivity of the channel to be measured.
The present invention provides a transmitter, comprising: the device comprises a single-channel transmitting optical device group, a single-channel test signal generator and a wavelength division multiplexer; wherein,
the single-channel transmitting optical device group is used for enabling a channel to be tested, forbidding other channels and transmitting a single-channel test signal to the wavelength division multiplexer;
a single channel test signal generator for generating a single channel test signal;
and the wavelength division multiplexer is used for sending the single-channel test signal in the channel to be tested.
In the foregoing solution, the single-channel test signal generator is specifically configured to shield a framing signal and generate a single-channel test signal based on a pseudorandom sequence.
The present invention provides a receiver, comprising: the system comprises a wavelength division demultiplexer, a single-channel receiving optical device group and a single-channel error code detector; wherein,
the wavelength division demultiplexer is used for receiving a single-channel test signal in a channel to be tested;
the single-channel receiving optical device group is used for enabling the channel to be tested and forbidding other channels;
and the single-channel error code detector is used for carrying out error code detection on the single-channel test signal.
In the above-mentioned scheme, the single-channel error code detector is specifically configured to perform error code detection on the single-channel test signal on the channel to be tested based on the test sequence.
The invention provides an error code testing system of a multi-channel system, which comprises: a transmitter, a receiver; wherein,
the transmitter is used for enabling the channel to be tested, forbidding other channels and sending a single-channel test signal in the channel to be tested;
and the receiver is used for receiving the single-channel test signal at the channel to be tested and carrying out error code detection on the single-channel test signal.
In the above scheme, the transmitter is specifically configured to shield a framing signal and generate a single-channel test signal based on a pseudorandom sequence.
In the above scheme, the receiver is specifically configured to perform error code detection on the single-channel test signal on the channel to be tested based on the test sequence.
In the above scheme, the system further comprises: and the management equipment is used for configuring the transmitter and the receiver to respectively enter a test mode, wherein the transmitter is configured to shield a framing signal to generate a single-channel test signal, and the receiver is configured to perform error code detection based on a set test sequence.
In the above scheme, the system further comprises: an optical variable attenuator, an optical power meter; wherein,
the receiver is also used for sending the current error rate to the management equipment after carrying out error code detection on the single-channel test signal;
the management equipment is also used for receiving the current bit error rate sent by the receiver and sending a control signal to the optical variable attenuator;
the optical variable attenuator is used for receiving the control signal and adjusting power to enable the current error rate to reach a reference error rate;
and the optical power meter is used for measuring the input optical power of the current receiver and recording the input optical power as the receiver sensitivity of the channel to be measured.
The invention provides a method, a device and a system for testing error codes of a multi-channel system.A transmitter enables a channel to be tested, prohibits other channels, transmits a single-channel test signal in the channel to be tested, and a receiver performs error code detection on the single-channel test signal; therefore, the test configuration is greatly simplified, the effect of no additional multiplexer/demultiplexer is achieved, the test of all channels is completed through one-time connection in the test process, the optical interface does not need to be converted, the test cost is reduced, and the test efficiency is improved.
Drawings
FIG. 1 is a schematic diagram of a system for testing the sensitivity of a 100G client side optical module receiver;
fig. 2 is a schematic flow chart of a method for implementing error code testing of a multi-channel system according to an embodiment of the present invention;
fig. 3 is a schematic flow chart of a method for implementing error code testing of a multi-channel system according to a second embodiment of the present invention;
fig. 4 is a schematic flow chart of a method for implementing error code testing of a multi-channel system according to a third embodiment of the present invention;
fig. 5 is a schematic flow chart illustrating a process of testing the receiver sensitivity of a channel to be tested according to a third embodiment of the present invention;
fig. 6 is a schematic structural diagram of a transmitter according to a fourth embodiment of the present invention;
fig. 7 is a schematic structural diagram of a receiver according to a fifth embodiment of the present invention;
fig. 8 is a schematic structural diagram of an error code testing system for implementing a multi-channel system according to a sixth embodiment of the present invention.
Detailed Description
In the embodiment of the invention, the transmitter enables the channel to be tested, prohibits other channels, transmits a single-channel test signal in the channel to be tested, and the receiver performs error code detection on the single-channel test signal.
The invention is further described in detail below with reference to the figures and the specific embodiments.
Example one
The embodiment of the invention realizes an error code testing method of a multi-channel system, as shown in figure 2, the method comprises the following steps:
step 201: enabling a channel to be tested by the transmitter, and forbidding other channels;
specifically, the single-channel transmitting optical devices in the transmitter correspond to the channels one to one, and when one of the channels needs to be tested, the channel is used as a channel to be tested, the single-channel transmitting optical device corresponding to the channel to be tested is turned on, and the single-channel transmitting optical devices corresponding to other channels are turned off.
Step 202: the transmitter sends a single-channel test signal on a channel to be tested;
specifically, the transmitter shields a framing signal sent by a single board, generates a single channel test signal, and sends the single channel test signal in a channel to be tested;
wherein the single-channel test signal may be generated by a multiplexing and demultiplexing chip in the transmitter, and the generation may be based on a pseudo-random sequence.
Here, the single channel refers to an optical single channel, for example, a 100G signal transmission is multiplexed by 4 paths of 25G optical signals, and the single channel is 25G; in the case of 400G signals, a single channel refers to 50G or 100G.
Example two
The embodiment of the invention realizes an error code testing method of a multi-channel system, as shown in figure 3, the method comprises the following steps:
step 301: the receiver receives a single-channel test signal at a channel to be tested;
specifically, the single-channel receiving optical devices in the receiver correspond to the channels one to one, and according to the tested channel to be tested, the single-channel receiving optical device corresponding to the channel to be tested is started, the single-channel receiving optical devices corresponding to other channels are turned off, and the single-channel test signal is received in the channel to be tested.
Step 302: the receiver carries out error code detection on the single-channel test signal;
specifically, the receiver performs error code detection on the single-channel test signal on the channel to be tested based on a set test sequence.
EXAMPLE III
The embodiment of the invention realizes an error code testing method of a multi-channel system, as shown in figure 4, the method comprises the following steps:
step 401: enabling a channel to be tested by the transmitter, and forbidding other channels;
specifically, the single-channel transmitting optical devices in the transmitter correspond to the channels one to one, and when one of the channels needs to be tested, the channel is used as a channel to be tested, the single-channel transmitting optical device corresponding to the channel to be tested is turned on, and the single-channel transmitting optical devices corresponding to other channels are turned off.
Step 402: the transmitter sends a single-channel test signal on a channel to be tested;
specifically, the transmitter shields a framing signal sent by a single board, generates a single channel test signal, and sends the single channel test signal in a channel to be tested;
wherein the single-channel test signal may be generated by a multiplexing and demultiplexing chip in the transmitter, and the generation may be based on a pseudo-random sequence.
Here, the single channel refers to an optical single channel, for example, a 100G signal transmission is multiplexed by 4 paths of 25G optical signals, and the single channel is 25G; in the case of 400G signals, a single channel refers to 50G or 100G.
Step 403: the receiver receives a single-channel test signal at a channel to be tested;
specifically, the single-channel receiving optical devices in the receiver correspond to the channels one to one, and according to the tested channel to be tested, the single-channel receiving optical device corresponding to the channel to be tested is started, the single-channel receiving optical devices corresponding to other channels are turned off, and the single-channel test signal is received in the channel to be tested.
Step 404: the receiver carries out error code detection on the single-channel test signal;
specifically, the receiver performs error code detection on the single-channel test signal on the channel to be tested based on a set test sequence.
The above steps 401-404 give the error code detection for a single channel to be detected, and the error code detection for all channels to be detected can be completed by repeating the above steps.
In testing the receiver sensitivity of the channel under test, as shown in fig. 5, the method further includes:
step 405: after the receiver carries out error code detection on the single-channel test signal, the current error code rate is sent to the management equipment;
step 406: the management equipment controls the optical variable attenuator to adjust the power so that the current error rate reaches the reference error rate;
here, the management apparatus may determine a value for power adjustment of the optical variable attenuator according to the current bit error rate, and transmit the value to the optical variable attenuator through the control signal.
The reference bit error rate is based on system specification, for example, the 100G system specification bit error rate is 1E-12; the error rate is allowed to be higher if the system has forward error correction coding, e.g. 5E-5.
Step 407: the optical power meter measures the input optical power of the current receiver and records the input optical power as the receiver sensitivity of the channel to be measured.
When other series of parameters of the channel to be tested need to be tested, the calculation can be carried out through the sensitivity of the receiver and the corresponding parameters, for example, the light modulation amplitude of each channel can be obtained through the joint calculation of the sensitivity of the receiver and the extinction ratio.
In this embodiment, the receiver sensitivity and other parameters include, but are not limited to, receiver sensitivity per channel, optical modulation amplitude per channel (OMA) receive sensitivity, OMA pressurized receive sensitivity per channel test, transmitter per channel, and dispersion transmission cost.
Example four
In order to implement the above method, the present invention further provides a transmitter, as shown in fig. 6, including: a single channel transmitting optical device group 61, a single channel test signal generator 62, a wavelength division multiplexer 63; wherein,
the single-channel transmitting optical device group 61 includes N single-channel transmitting optical devices, and is configured to enable a channel to be tested, disable other channels, and transmit a single-channel test signal to the wavelength division multiplexer 63;
a single-channel test signal generator 62, which may be implemented by a multiplexing and demultiplexing chip, for generating a single-channel test signal;
a wavelength division multiplexer 63 for transmitting a single channel test signal on a channel to be tested;
the single-channel transmitting optical devices in the single-channel transmitting optical device group 61 correspond to the channels one to one, and when one of the channels needs to be tested, the channel is used as a channel to be tested, the single-channel transmitting optical device corresponding to the channel to be tested is turned on, and the single-channel transmitting optical devices corresponding to other channels are turned off.
The single channel test signal generator 62 masks the framing signal and may generate a single channel test signal based on a pseudo-random sequence.
EXAMPLE five
In order to implement the above method, the present invention further provides a receiver, as shown in fig. 7, the receiver including: a wavelength division demultiplexer 71, a single-channel receiving optical device group 72, and a single-channel error code detector 73; wherein,
a wavelength division demultiplexer 71 for receiving a single channel test signal at a channel to be tested;
the single-channel receiving optical device group 72 includes N single-channel receiving optical devices, and is configured to enable a channel to be tested and disable other channels;
a single-channel error detector 73 for performing error detection on the single-channel test signal;
the single-channel receiving optical devices in the single-channel receiving optical device group 72 correspond to the channels one to one, and according to the tested channel to be tested, the single-channel receiving optical device corresponding to the channel to be tested is turned on, and the single-channel receiving optical devices corresponding to other channels are turned off;
the single-channel error code detector 73 is specifically configured to perform error code detection on the single-channel test signal on the channel to be tested based on a set test sequence.
EXAMPLE six
The embodiment of the present invention implements an error code testing system of a multi-channel system, as shown in fig. 8, the system includes: a transmitter 81, a receiver 82; wherein,
a transmitter 81 for enabling a channel to be tested, disabling other channels, and transmitting a single-channel test signal in the channel to be tested;
a receiver 82, configured to receive a single-channel test signal at a channel to be tested, and perform error code detection on the single-channel test signal;
the transmitter 81 is specifically configured to shield a framing signal sent by a board, and generate a single channel test signal based on a pseudo random sequence;
the receiver 82 is specifically configured to perform error code detection on the single-channel test signal on the channel to be tested based on a set test sequence.
The system further comprises: and a management device 83, configured to configure the transmitter 81 and the receiver 82 to enter a test mode, respectively, wherein the transmitter 81 is configured to mask the framing signal to generate a single-channel test signal, and the receiver 82 is configured to perform error detection based on the set test sequence. Here, the configuring of the transmitter 81 and the receiver 82 to enter the test mode may be to transmit identification information of the corresponding test mode to the transmitter 81 and the receiver 82, respectively.
In addition, when testing the receiver sensitivity of the channel to be tested, the system further comprises: an optical variable attenuator 84, an optical power meter 85; wherein,
the receiver 82 is further configured to send the current bit error rate to the management device 83 after performing bit error detection on the single channel test signal;
the management device 83 is further configured to receive the current bit error rate sent by the receiver 82, and send a control signal to the optical variable attenuator 84;
the optical variable attenuator 84 is used for receiving the control signal and adjusting power to enable the current bit error rate to reach a reference bit error rate;
and the optical power meter 85 is used for measuring the input optical power of the current receiver and recording the input optical power as the receiver sensitivity of the channel to be measured.
Here, the management device 83 may transmit a measurement start signal to the optical power meter 85 to notify the optical power meter 85 to measure the input optical power of the current receiver.
By integrating the embodiments of the invention, only the channel to be tested is enabled, and the single-channel test signal is sent in the channel to be tested for error code detection, no additional multiplexer/demultiplexer is needed in the test system, so that the test configuration is greatly simplified, the test of all channels can be completed by one-time connection in the test process, no optical interface is needed to be converted, the test cost is reduced, and the test efficiency is improved.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, and any modifications, equivalents, improvements, etc. that are within the spirit and principle of the present invention should be included in the present invention.
Claims (17)
1. A method for testing error codes of a multi-channel system is characterized by comprising the following steps:
enabling a channel to be tested by the transmitter, and forbidding other channels;
and the transmitter sends a single-channel test signal on the channel to be tested.
2. The error code testing method of claim 1, wherein said transmitting a single channel test signal at said channel under test by said transmitter comprises: the transmitter shields a framing signal, generates a single-channel test signal based on the pseudo-random sequence, and transmits the single-channel test signal on a channel to be tested.
3. A method for testing error codes of a multi-channel system is characterized by comprising the following steps:
the receiver receives a single-channel test signal at a channel to be tested;
and the receiver carries out error code detection on the single-channel test signal.
4. The error code testing method of claim 3, wherein the receiver performing error code detection on the single channel test signal comprises: and the receiver carries out error code detection on the single-channel test signal on the channel to be detected based on the test sequence.
5. A method for testing error codes of a multi-channel system is characterized by comprising the following steps:
enabling a channel to be tested by the transmitter, and forbidding other channels;
the transmitter sends a single-channel test signal on a channel to be tested;
the receiver receives a single-channel test signal at a channel to be tested;
and the receiver carries out error code detection on the single-channel test signal.
6. The error code testing method of claim 5, wherein said transmitting a single channel test signal at the channel under test by the transmitter comprises: the transmitter shields a framing signal, generates a single-channel test signal based on the pseudo-random sequence, and transmits the single-channel test signal on a channel to be tested.
7. The error code testing method of claim 5, wherein the receiver performing error code detection on the single channel test signal comprises: and the receiver carries out error code detection on the single-channel test signal on the channel to be detected based on the test sequence.
8. The error code testing method of claim 5, further comprising:
after the receiver carries out error code detection on the single-channel test signal, the current error code rate is sent to the management equipment;
the management equipment controls the optical variable attenuator to adjust the power so that the current error rate reaches a reference error rate;
the optical power meter measures the input optical power of the current receiver and records the input optical power as the receiver sensitivity of the channel to be measured.
9. A transmitter, characterized in that the transmitter comprises: the device comprises a single-channel transmitting optical device group, a single-channel test signal generator and a wavelength division multiplexer; wherein,
the single-channel transmitting optical device group is used for enabling a channel to be tested, forbidding other channels and transmitting a single-channel test signal to the wavelength division multiplexer;
a single channel test signal generator for generating a single channel test signal;
and the wavelength division multiplexer is used for sending the single-channel test signal in the channel to be tested.
10. Transmitter according to claim 9, characterized in that the single-channel test signal generator, in particular for masking the framing signal, generates the single-channel test signal based on a pseudo-random sequence.
11. A receiver, characterized in that the receiver comprises: the system comprises a wavelength division demultiplexer, a single-channel receiving optical device group and a single-channel error code detector; wherein,
the wavelength division demultiplexer is used for receiving a single-channel test signal in a channel to be tested;
the single-channel receiving optical device group is used for enabling the channel to be tested and forbidding other channels;
and the single-channel error code detector is used for carrying out error code detection on the single-channel test signal.
12. The receiver according to claim 11, wherein said single-channel error detector is specifically configured to perform error detection on the single-channel test signal on the channel under test based on a test sequence.
13. An error code testing system for a multi-channel system, the system comprising: a transmitter, a receiver; wherein,
the transmitter is used for enabling the channel to be tested, forbidding other channels and sending a single-channel test signal in the channel to be tested;
and the receiver is used for receiving the single-channel test signal at the channel to be tested and carrying out error code detection on the single-channel test signal.
14. The error code testing system of claim 13, wherein said transmitter, in particular for masking the framing signal, generates the single channel test signal based on a pseudo-random sequence.
15. The error code testing system of claim 13, wherein the receiver is specifically configured to perform error code detection on the single-channel test signal on the channel under test based on a test sequence.
16. The error code testing system of claim 13, further comprising: and the management equipment is used for configuring the transmitter and the receiver to respectively enter a test mode, wherein the transmitter is configured to shield a framing signal to generate a single-channel test signal, and the receiver is configured to perform error code detection based on a set test sequence.
17. The error code testing system of claim 16, further comprising: an optical variable attenuator, an optical power meter; wherein,
the receiver is also used for sending the current error rate to the management equipment after carrying out error code detection on the single-channel test signal;
the management equipment is also used for receiving the current bit error rate sent by the receiver and sending a control signal to the optical variable attenuator;
the optical variable attenuator is used for receiving the control signal and adjusting power to enable the current error rate to reach a reference error rate;
and the optical power meter is used for measuring the input optical power of the current receiver and recording the input optical power as the receiver sensitivity of the channel to be measured.
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| CN201510130696.4A CN106160848B (en) | 2015-03-24 | 2015-03-24 | Error code testing method, device and system for multi-channel system |
| PCT/CN2016/072581 WO2016150249A1 (en) | 2015-03-24 | 2016-01-28 | Error code testing method, apparatus and system for multi-channel system |
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| CN201510130696.4A CN106160848B (en) | 2015-03-24 | 2015-03-24 | Error code testing method, device and system for multi-channel system |
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| CN108259084A (en) * | 2017-12-26 | 2018-07-06 | 武汉电信器件有限公司 | A kind of assessment harden structure of high-speed light receiver test and its test system |
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| CN107919908A (en) * | 2017-12-29 | 2018-04-17 | 上海航天科工电器研究院有限公司 | A kind of optical module receiving terminal sensitivity test system and its test method |
| CN109194391A (en) * | 2018-08-24 | 2019-01-11 | 武汉恒泰通技术有限公司 | A kind of error detection system and its detection method |
| CN109194391B (en) * | 2018-08-24 | 2021-05-18 | 武汉恒泰通技术有限公司 | Error code detection system and detection method thereof |
| CN109194396A (en) * | 2018-10-25 | 2019-01-11 | 福建亿榕信息技术有限公司 | Light sends the system and control method that power and optical receiver sensitivity are tested automatically |
| CN109194396B (en) * | 2018-10-25 | 2024-03-29 | 福建亿榕信息技术有限公司 | System for automatically testing optical transmission power and optical receiving sensitivity and control method |
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| WO2016150249A1 (en) | 2016-09-29 |
| CN106160848B (en) | 2020-06-26 |
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