CN113839709A

CN113839709A - Method and device for calibrating error floor

Info

Publication number: CN113839709A
Application number: CN202010588741.1A
Authority: CN
Inventors: 邓建; 姚海涛; 严晖
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2020-06-24
Filing date: 2020-06-24
Publication date: 2021-12-24
Anticipated expiration: 2040-06-24
Also published as: WO2021259118A1; CN113839709B

Abstract

The embodiment of the application discloses a method and a device for calibrating an error floor, which are used for providing a butted BER floor in a scene that an optical transmitter and an optical receiver are randomly paired. The scheme is as follows: when a first optical transmitter and a first optical receiver are in a pairing connection state, an error-leveling layer calibration device acquires a first Q value, a first contribution value and a second contribution value, wherein the first Q value is a parameter for measuring signal quality when the reference optical transmitter and the reference optical receiver are in the pairing connection state, the first contribution value is an influence component of the first optical transmitter on the parameter for measuring the signal quality when the first optical transmitter is in the pairing connection state, and the second contribution value is an influence component of the first optical receiver on the parameter for measuring the signal quality when the first optical receiver is in the pairing connection state; then, the error code leveling layer calibration equipment calculates a second Q value according to the first Q value, the first contribution value and the second contribution value; and finally, the error code leveling layer calibration equipment calculates the first error code leveling layer according to the second Q value.

Description

Method and device for calibrating error floor

Technical Field

The present application relates to the field of optical communications, and in particular, to a method and an apparatus for calibrating an error floor.

Background

A transceiver (a punder module) is one of the core components of an optical transmission system, the performance of the punder module has direct influence on the performance of the transmission system, and a bit error floor (BER floor) is ponOne of the key indicators of the der module. BER floor refers to a Bit Error Rate (BER) value that is obtained by considering only the imperfect characteristics and noise characteristics of each device of the optical transceiver itself in the absence of other performance degradation factors from the outside, such as Amplified Spontaneous Emission ASE (am) noise generated by the optical amplifier, nonlinearity, Dispersion, Polarization Mode Dispersion (PMD) generated in the optical fiber transmission, Polarization Dependent Loss (PDL), filtering effects, and the like. Experimentally, the BER floor value is basically equivalent to the BER reported by the optical receiver when the optical transmitter and the optical receiver are directly connected. Since Forward-error-correction (FEC) technology is commonly used in the optical transceiver at present, the error rate is actually referred to as pre-error-correction error rate (preffec BER). Theoretically and engineering, one usually describes BER with Q value. Q and BER have a one-to-one correspondence:

therefore, BER floor is the pre fec BER fed back by the receiver when the optical transmitter and the optical receiver are directly connected, not via the optical amplifier (i.e. no ASE noise is present) nor via the transmission fiber (i.e. no transmission impairment effect is present). Similar to the above formula, the Q value corresponding to BER floor can also be defined as:

in practical application, BER floor of the optical transceiver is an important parameter participating in the Q value budget of the optical fiber transmission system, and has obvious influence on the Q value and BER of the system after transmission, and needs to be determined in advance.

And currently there are usually mainly implementations where the BER floor of each optical transceiver is directly measured and calibrated in one possible implementation. For example, a transmitter and a receiver integrated with transceiving are looped, the received optical power is ensured to be in an optimal received optical power interval, the pre fec BER reported by the receiver is recorded, and the BER floor value is recorded in optical module software or a network design library so as to be called in network planning and online calculation. In another implementation mode, for a transceiver integrated transmitter and a receiver of the same type (the modulation code type, the receiving mode, the rate and the like are the same), measuring the BER floor of a plurality of individuals in self-loop, and determining the BER floor as the BER floor of the type punder according to a certain screening probability; even the worst value of the measurements was chosen as the BER floor value for this type of binder.

However, the above solutions cannot cover any combined scene of any combined transmitter and receiver on the existing network, and have no universality.

Disclosure of Invention

The embodiment of the application provides a calibration method and a device of an error floor, which are used for providing a BER floor after butt joint for a scene that an optical transmitter and an optical receiver are randomly paired, and providing key parameters for the prediction and budget of a pre FEC BER/Q value in the online switching-out, tuning-optimization and service distribution of an optical transmission system.

In a first aspect, an embodiment of the present application provides a method for calibrating an error-leveling layer, which is particularly applied to an optical communication system, where the optical communication system includes a first optical receiver and a first optical transmitter, where the first optical receiver and the first optical transmitter have calibrated a first contribution value of the first optical transmitter and a second contribution value of the first optical receiver, the first contribution value is an influence component of the first optical transmitter on a parameter for measuring signal quality when the first optical transmitter is in a paired connection state, and the second contribution value is an influence component of the first optical receiver on the parameter for measuring signal quality when the first optical receiver is in the paired connection state; when the first optical transmitter and the first optical receiver are in a pairing connection state, the error leveling layer calibration device acquires a first Q value, the first contribution value and the second contribution value, wherein the first Q value is a parameter for measuring signal quality when the reference optical transmitter and the reference optical receiver are in the pairing connection state, and the parameter has a corresponding relation with the error leveling layer; then the error code leveling layer calibration equipment calculates a second Q value when the first optical transmitter and the first optical receiver are in a pairing connection state according to the first Q value, the first contribution value and the second contribution value; and finally, the error code leveling layer calibration equipment calculates a corresponding first error code leveling layer when the first optical transmitter and the first optical receiver are paired and in a pairing connection state according to the second Q value.

In this embodiment, the first contribution value may be stored in a register or a memory corresponding to the first optical transmitter or in a server corresponding to the first optical transmitter; similarly, the second contribution value may also be stored in a register or a memory corresponding to the first optical receiver or in a server corresponding to the first optical receiver. Meanwhile, the error-floor calibration device may be a network device in the optical communication system (i.e., a third-party device other than the first optical transmitter and the first optical receiver) or may be the first optical transmitter or the first optical receiver.

In this embodiment, the contribution value to the Q value and the Q value when the reference optical receiver and the reference optical transmitter are connected in a pairing manner are both stored in the optical receiver and the optical transmitter, so that when the optical receiver and the optical transmitter are connected in a pairing manner, the Q value of the optical receiver and the Q value of the optical transmitter in a pairing connection state are calculated according to the respective contribution values to the Q values, and finally, the corresponding error floor when the optical receiver and the optical transmitter are connected in a pairing manner is calculated according to the corresponding relationship between the Q values and the error floors. The optical transmitter and the optical receiver can be arbitrarily paired, a butted BER floor is provided, and key parameters are provided for the prediction and budget of the pre-FEC BER/Q value in the processes of online opening, tuning and service distribution of the optical transmission system. Optionally, the error floor calibration device calculates the second Q value according to the first Q value, the first contribution value, and the second contribution value by using a first formula;

wherein the first formula is:

wherein, the Q_TTE(TX_a,RX_b) The second Q value is the second Q value when the first optical transmitter and the first optical receiver are connected in a pairing way, the Q value is_TTE(TX_ref,RX_ref) For the first Q value when the reference optical transmitter and the reference optical receiver are connected in pairing mode, the first Q value

The first contribution value is the influence component of the first optical transmitter on the parameter for measuring the signal quality under the self-pairing connection state

The second contribution value is the influence component of the first optical receiver on the parameter for measuring the signal quality in the paired connection state. It is understood that, in the present embodiment, the TX_aFor indicating the first optical transmitter, the RX_bFor indicating the first optical receiver, the TX_refFor indicating the reference optical transmitter, the RX_refFor indicating the reference optical receiver.

Optionally, after the error floor calibration device calculates the second Q value, a first error floor corresponding to the first optical transmitter and the first optical receiver in the paired connection state is calculated according to a second formula, where the second formula is:

wherein the BER floor₁For the first error-floor, the Q_TTE(TX_a,RX_b) The second Q value.

Optionally, the first contribution value of the first optical transmitter and the second contribution value of the first optical receiver may be calibrated by using the following technical solutions:

when calibrating the first contribution of the first optical transmitter, the specific operation is as follows:

when the reference optical transmitter and the reference optical receiver are in a matched connection state, acquiring a second error code level layer of the reference optical transmitter and the reference optical receiver; then, the first Q value is obtained by calculation according to the second error code flat layer; then when the first optical transmitter and the reference optical receiver are in a matched connection state, acquiring a third error code level layer corresponding to the first optical transmitter and the reference optical receiver; then, calculating a third Q value corresponding to the first optical transmitter and the reference optical receiver according to the third error code leveling layer; and finally, calculating the first contribution value according to the first Q value and the third Q value, and storing the first Q value and the first contribution value.

Based on the scheme, the third Q value may be calculated according to the third error floor by using a third formula, where the third formula is:

wherein, the Q_TTE(TX_a,RX_ref) The BER floor is the third Q value corresponding to the first optical transmitter and the reference optical receiver in the pairing connection state₃The third error-floor.

When the first contribution value is calculated according to the first Q value and the third Q value, a fourth formula may be used for calculation, where the fourth formula is:

wherein, the

The Q is a first contribution value of the first optical transmitter to a parameter for measuring signal quality in a mated connection state_TTE(TX_a,RX_ref) The third Q value is corresponding to the first optical transmitter and the reference optical receiver in the matching connection state_TTE(TX_ref,RX_ref) The first Q value is corresponding to the condition that the reference optical transmitter and the reference optical receiver are in a matched connection state; wherein, the

The BER floor₂The second error-floor.

When calibrating the second contribution of the first optical receiver, the specific operations are as follows:

when the reference optical transmitter and the reference optical receiver are in a matched connection state, acquiring a second error code level layer of the reference optical transmitter and the reference optical receiver; calculating the first Q value corresponding to the reference optical transmitter and the reference optical receiver according to the second error code level layer; when the first optical receiver and the reference optical transmitter are in a matched connection state, acquiring a fourth error code level layer of the first optical receiver and the reference optical transmitter; calculating a fourth Q value corresponding to the first optical receiver and the reference optical transmitter according to the fourth error code level layer; calculating the second contribution value according to the first Q value and the fourth Q value; the first Q value and the second contribution value are stored at the first optical receiver.

Based on the scheme, the fourth Q value may be calculated according to the fourth error floor by using a fifth formula, where the fifth formula is:

wherein, Q is_TTE(TX_ref,RX_b) The BER floor is the third Q value corresponding to the first optical receiver and the reference optical transmitter in the pairing connection state₄Is the fourth error-floor.

And when calculating the second contribution value according to the first Q value and the fourth Q value, a sixth formula can be used for calculation, where the sixth formula is:

wherein, the

For the second contribution, the Q_TTE(TX_ref,RX_b) The fourth Q value is corresponding to the first optical receiver and the reference optical transmitter in the pairing connection state, Q_TTE(TX_ref,RX_ref) The first Q value is corresponding to the reference optical transmitter and the reference optical receiver in a pairing connection state; wherein, the

The BER floor₂For indicating the second error-floor.

It can be understood that the calibration steps are all calibrated before the first optical transmitter and the first optical receiver leave the factory, so that the second error-level layer, the third error-level layer, and the fourth error-level layer can be directly reported and acquired by the optical receiver or acquired by an error tester.

It is understood that, in this embodiment, the reference optical transmitter and the reference optical receiver may be an integrated optical transceiver (i.e., located on the same binder board); alternatively, the reference optical transmitter and the reference optical receiver may be included in different optical transceivers (i.e., on different punder boards).

In a second aspect, an embodiment of the present application provides an error floor calibration device, where the device has a function of implementing the first aspect. The functions can be realized by hardware, and the functions can also be realized by executing corresponding software by hardware. The hardware or software includes one or more modules corresponding to the above-described functions.

In a possible implementation manner, the error-floor calibration apparatus includes a unit or a module for performing the steps of the first aspect. For example, the error-floor calibration apparatus includes: an obtaining module, configured to obtain a first Q value, a first contribution value, and a second contribution value when a first optical transmitter and a first optical receiver are in a paired connection state, where the first Q value is a parameter for measuring signal quality received by a reference optical receiver when the reference optical transmitter and the reference optical receiver are in a paired connection state, the first contribution value is an influence component of the first optical transmitter on the parameter for measuring signal quality when the first optical transmitter is in the paired connection state, and the second contribution value is an influence component of the first optical receiver on the parameter for measuring signal quality when the first optical receiver is in the paired connection state;

a processing module, configured to calculate a second Q value according to the first Q value, the first contribution value, and the second contribution value, where the second Q value is a parameter used for measuring quality of a signal received by the first optical receiver when the first optical transmitter and the first optical receiver are connected in a paired manner; and calculating a first error code level layer when the first optical transmitter is connected with the first optical receiver in a pairing way according to the second Q value.

Optionally, the device further includes a storage module, configured to store necessary program instructions and data of the error-floor calibration device.

In one possible implementation, the error-floor calibration apparatus includes: a processor and a transceiver, wherein the processor is configured to support the error-floor calibration device to perform the corresponding functions of the method provided by the first aspect. The transceiver is used for supporting the information or instructions related to the error floor calibration equipment in the calibration process. Optionally, the apparatus may further comprise a memory, coupled to the processor, that stores program instructions and data necessary for the error-floor calibration device.

In a possible implementation manner, when the error-level calibration device is a chip in a network device or an optical transceiver, the chip includes: a processing module and a transceiver module, which may be, for example, an input/output interface, a pin, or a circuit on the chip, for obtaining a first Q value, the first contribution value and the second contribution value, and transmitting the first Q value, the first contribution value and the second contribution value to other chips or modules coupled to the chip; the processing module may be, for example, a processor, and the processor is configured to calculate a second Q value according to the first Q value, the first contribution value and the second contribution value, where the second Q value is a parameter for measuring quality of a signal received by the first optical receiver when the first optical transmitter and the first optical receiver are connected in a paired manner; and calculating a first error code level when the first optical transmitter is connected with the first optical receiver in a pairing way according to the second Q value. The processing module can execute computer-executable instructions stored in the storage unit to support the error-floor calibration device to execute the method provided by the first aspect. Alternatively, the storage unit may be a storage unit in the chip, such as a register, a cache, and the like, and the storage unit may also be a storage unit located outside the chip, such as a read-only memory (ROM) or another type of static storage device that can store static information and instructions, a Random Access Memory (RAM), and the like.

In one possible implementation, the apparatus includes: a processor, baseband circuitry, radio frequency circuitry, and an antenna. The processor is used for realizing control of functions of each circuit part, the baseband circuit is used for generating a data packet containing signaling information, and the data packet is subjected to analog conversion, filtering, amplification, up-conversion and the like through the radio frequency circuit and then is sent out through the antenna. Optionally, the apparatus further comprises a memory that stores program instructions and data necessary for the error-floor calibration device.

The processor mentioned in any of the above mentioned places may be a general Processing Unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits for controlling the execution of the program of the calibration method of the error level layer in each of the above mentioned aspects.

In a third aspect, an embodiment of the present application provides a computer-readable storage medium, where computer instructions are stored, and the computer instructions are configured to execute the method described in any possible implementation manner in the first aspect.

In a fourth aspect, embodiments of the present application provide a computer program product containing instructions, which when executed on a computer, cause the computer to perform the method according to any possible implementation manner of the first aspect.

In a fifth aspect, the present application provides a chip system, which includes a processor for enabling an error floor calibration apparatus to implement the functions referred to in the above aspects, such as generating or processing data and/or information referred to in the above methods. In a possible design, the chip system further includes a memory, and the memory is configured to store program instructions and data necessary for the error-floor calibration apparatus to implement the functions of any one of the possible implementation manners described in the above first aspect. The chip system may be formed by a chip, and may also include a chip and other discrete devices.

In a sixth aspect, an embodiment of the present application provides an optical communication system, which includes the optical transmitter, the optical receiver, and the error-level layer calibration apparatus described in the foregoing aspects.

Drawings

Fig. 1 is an exemplary architecture diagram of an optical communication system in an embodiment of the present application;

fig. 2 is a schematic diagram of an embodiment of a method for calibrating an error floor in an embodiment of the present application;

FIG. 3 is a comparison graph of the effect of testing a Ponder template by applying the technical solution provided by the present application and the prior art;

FIG. 4 is a schematic diagram of an exemplary test of a reference optical receiver and a reference optical transmitter in an embodiment of the present application;

FIG. 5 is a schematic diagram of an exemplary test of a reference optical receiver and an optical transmitter to be calibrated in an embodiment of the present application;

FIG. 6 is a schematic diagram of an exemplary test of a reference optical transmitter and an optical receiver to be calibrated in an embodiment of the present application;

FIG. 7 is a flow chart illustrating the calibration of the first contribution of the first optical transmitter according to an embodiment of the present application;

FIG. 8 is a flow chart illustrating the calibration of the second contribution of the first optical receiver in the embodiment of the present application;

fig. 9 is a schematic diagram of an embodiment of an error floor calibration apparatus in an embodiment of the present application;

fig. 10 is a schematic diagram of another embodiment of an error floor calibration apparatus in an embodiment of the present application.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the embodiments of the present application are described below with reference to the accompanying drawings, and it is obvious that the described embodiments are only some embodiments of the present application, but not all embodiments. As can be known to those skilled in the art, with the advent of new application scenarios, the technical solution provided in the embodiments of the present application is also applicable to similar technical problems.

The terms "first," "second," and the like in the description and in the claims of the present application and in the above-described drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It will be appreciated that the data so used may be interchanged under appropriate circumstances such that the embodiments described herein may be practiced otherwise than as specifically illustrated or described herein. Moreover, the terms "comprises," "comprising," and any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or modules is not necessarily limited to those steps or modules explicitly listed, but may include other steps or modules not expressly listed or inherent to such process, method, article, or apparatus. The naming or numbering of the steps appearing in the present application does not mean that the steps in the method flow have to be executed in the chronological/logical order indicated by the naming or numbering, and the named or numbered process steps may be executed in a modified order depending on the technical purpose to be achieved, as long as the same or similar technical effects are achieved. The division of the units presented in this application is a logical division, and in practical applications, there may be another division, for example, multiple units may be combined or integrated into another system, or some features may be omitted, or not executed, and in addition, the shown or discussed coupling or direct coupling or communication connection between each other may be through some interfaces, and the indirect coupling or communication connection between the units may be in an electrical or other similar form, which is not limited in this application. Furthermore, the units or sub-units described as the separate parts may or may not be physically separate, may or may not be physical units, or may be distributed in a plurality of circuit units, and some or all of the units may be selected according to actual needs to achieve the purpose of the present disclosure.

An optical transceiver (also called a binder module) is one of the core components of an optical transmission system. The performance of the binder module has a direct influence on the performance of the transmission system, and the bit error floor (BER floor) is one of the key indicators of the binder module. The BER floor refers to a BER value resulting from considering only imperfect characteristics, noise characteristics, etc. of each device of the optical transceiver itself in the absence of other performance degradation factors from the outside (e.g., ASE noise generated by an optical amplifier, nonlinearity generated in optical fiber transmission, dispersion, PMD, PDL, filter effect, etc.). Experimentally, the BER floor value is basically equivalent to the BER reported by the optical receiver when the optical transmitter and the optical receiver are directly connected. Since the optical transceiver currently adopts the FEC technology, the bit error rate is actually referred to as the pre FEC BER. Theoretically and engineering, one usually describes BER by Q value, which can be defined as a parameter used to measure the quality of the signal received by the optical receiver. Q and BER have a one-to-one correspondence:

the BER floor is the pre fec BER fed back by the receiver when the optical transmitter and the optical receiver are directly connected without passing through the optical amplifier (i.e. without ASE noise) and the transmission fiber (i.e. without transmission impairment effect). Similar to the above formula, the Q value corresponding to BER floor can also be defined as:

in practical application, BER floor of the optical transceiver is an important parameter participating in the Q value budget of the optical fiber transmission system, and has obvious influence on the Q value and BER of the system after transmission, and needs to be determined in advance. In the architecture shown in fig. 1, the optical transmission system includes two optical transceivers, wherein an optical transmitter in one optical transceiver and an optical receiver in the other optical transceiver establish a connection through an optical fiber, wherein the optical transmitter and the optical receiver are connected by the optical fiberThe optical transmitter and the optical receiver can be sequentially connected with optical devices such as a wave combiner, an adjustable attenuator, a wave splitter and the like through optical fibers. The optical transmitter performs an electrical-to-optical conversion on the traffic signal and modulates the traffic signal onto an optical wavelength that carries information of the traffic signal. The optical signal is sent to the optical receiver through the optical fiber, the optical receiver receives the optical signal, and performs operations such as photoelectric conversion, data demodulation and the like on the optical signal, and finally demodulates the service signal. It is understood that the combiner and the splitter are both optical filters, and the filtering bandwidth thereof satisfies the transmission bandwidth required by the binder module, such as 37.5GHz, 50GHz, 75GHz, 100GHz, and so on. The variable optical attenuator is used to adjust the received optical power to a suitable value such that the optical power is not close to the overload optical power value of the optical receiver, nor to its sensitivity value, such that the value of the received BER is around the lowest value. In order to accurately obtain an error code level value after the optical receiver is connected with the optical transmitter in a matching manner, the embodiment of the application provides the following technical scheme:

when the first optical receiver and the first optical transmitter leave a factory, calibrating a first contribution value of the first optical transmitter and a second contribution value of the first optical receiver, wherein the first contribution value is an influence component of the first optical transmitter on a parameter for measuring signal quality when the first optical transmitter is in a pairing connection state, and the second contribution value is an influence component of the first optical receiver on the parameter for measuring signal quality when the first optical receiver is in a pairing connection state; when the first optical transmitter and the first optical receiver are in a pairing connection state, the error leveling layer calibration device acquires a first Q value, the first contribution value and the second contribution value, wherein the first Q value is a parameter for measuring the quality of a signal received by the reference optical receiver when the reference optical transmitter and the reference optical receiver are in the pairing connection state, and the parameter corresponds to the error leveling layer; then the error code leveling layer calibration equipment calculates a second Q value when the first optical transmitter and the first optical receiver are in a pairing connection state according to the first Q value, the first contribution value and the second contribution value; and finally, the error code leveling layer calibration equipment calculates a corresponding first error code leveling layer when the first optical transmitter and the first optical receiver are paired and in a pairing connection state according to the second Q value.

For convenience of understanding, some terms referred to in the embodiments of the present application are described below:

q value: for measuring the signal quality of the traffic signal received by the optical receiver.

Contribution value: the method is used for indicating the influence component of the optical receiver or the optical transmitter on the Q value when the optical receiver or the optical transmitter is in the pairing connection state, and estimating an error floor when the optical receiver and the optical transmitter are in random pairing connection in the optical communication system. For example, when the optical receiver a and the optical transmitter B are in a mated connection state, a Q value corresponding to the optical receiver a and the optical transmitter B is a, and a component of the Q value affected by the device imperfection characteristic and the noise characteristic of the optical receiver a is B, the B is a contribution value stored by the optical receiver a. The contribution values of each optical transmitter and each optical receiver in the optical communication network are calibrated according to the reference optical receiver and the reference optical transmitter at the time of factory shipment, and are stored as fixed values in the storage units corresponding to the respective optical transmitters or optical receivers. And the reference optical transmitter and the reference optical receiver are determined by a user at the time of factory shipment.

Error floor: refers to a BER value resulting from considering only imperfect characteristics, noise characteristics, etc. of each device of the optical transceiver itself in the absence of other performance degradation factors from the outside (e.g., ASE noise generated from an optical amplifier, nonlinearity generated in optical fiber transmission, dispersion, PMD, PDL, filtering effects, etc.). Experimentally, the BER floor value is basically equivalent to the BER reported by the optical receiver when the optical transmitter and the optical receiver are directly connected.

In this embodiment, the error floor calibration device may be a network device (i.e., a third-party device independent of the optical transceiver) in the optical communication system, or may be the optical receiver or the optical transmitter.

Specifically referring to fig. 2, an embodiment of a method for calibrating an error floor in an embodiment of the present application includes:

201. when the first optical transmitter and the first optical receiver are in a paired connection state, the error-leveling layer calibration device obtains a first Q value, the first contribution value, and the second contribution value, where the first Q value is a parameter for measuring signal quality when the reference optical transmitter and the reference optical receiver are in a paired connection, the first contribution value is an influence component of the first optical transmitter on the parameter for measuring signal quality when the first optical transmitter is in the paired connection state, and the second contribution value is an influence component of the first optical receiver on the parameter for measuring signal quality when the first optical receiver is in the paired connection state.

In this embodiment, the first optical transmitter and the first optical receiver calibrate a first contribution value of the first optical transmitter and a second contribution value of the first optical receiver according to the reference optical transmitter and the reference optical receiver before factory shipment, and store the first contribution value and the first Q value in the storage module of the first optical transmitter, and store the second contribution value and the first Q value in the storage module of the first optical receiver. It is understood that the storage module may be a corresponding register or memory of the optical transmitter, etc. When the first optical transmitter and the first optical receiver are applied to an optical communication system, if the first optical transmitter and the first optical receiver are in a pairing connection state, the error-leveling layer calibration device may directly obtain the first Q value, the first contribution value, and the second contribution value from the storage modules corresponding to the first optical transmitter and the first optical receiver.

In this embodiment, the first contribution value of the first optical transmitter is calibrated when the first optical transmitter is paired and connected with a reference optical receiver, and when the first optical transmitter is paired and connected with any other optical receiver in an optical communication network, the first contribution value is used to estimate an error floor, that is, the first contribution value of the first optical transmitter is a fixed value. Similarly, the second contribution value of the first optical receiver is calibrated when the first optical receiver is in paired connection with the reference optical transmitter, and the first optical transmitter estimates the error floor by using the second contribution value when the first optical transmitter is in paired connection with any other optical transmitter in the optical communication network, that is, the second contribution value of the first optical receiver is a fixed value.

202. And the error-level layer calibration equipment calculates a second Q value according to the first Q value, the first contribution value and the second contribution value, wherein the second Q value is a parameter for measuring the signal quality when the first optical transmitter and the first optical receiver are in a pairing connection state.

After obtaining the first Q value, the first contribution value, and the second contribution value, the error floor calibration device calculates the second Q value by using a first formula, where the first formula is:

wherein, the Q_TTE(TX_a,RX_b) Is the second Q value, the Q_TTE(TX_ref,RX_ref) For the first Q value when the reference optical transmitter and the reference optical receiver are connected in pairing mode, the first Q value

The second contribution value is the influence component of the first optical receiver on the parameter for measuring the signal quality in the paired connection state.

It is understood that, in the present embodiment, the TX_aFor indicating the first optical transmitter, the RX_bFor indicating the first optical receiver, the TX_refFor indicating the reference optical transmitter, the RX_refFor indicating the reference optical receiver.

203. And the error code level layer calibration equipment calculates a corresponding first error code level layer when the first optical transmitter and the first optical receiver are in a pairing connection state according to the second Q value.

The error floor calibration device calculates the first error floor according to a formula (i.e. a second formula) corresponding to the Q value and the error floor.

Wherein the second formula is:

In this embodiment, the above scheme is used to perform testing and data calculation on 6 punder modules of 200G 16 Quadrature Amplitude Modulation (QAM), where one of the punder modules is used as a reference punder, and the other 5 punders are used as to-be-calibrated individuals. Arbitrary interconnection was made between the optical transmitters and optical receivers of 5 punders, and the obtained 25 BER floor values were measured, as shown by the abscissa of the scatter plot in fig. 3, with the BER floor distributed at 2.6 × 10^-4～7.4×10^-6The corresponding Q value distribution is 10.8 dB-12.74 dB, and the difference is 2 dB. Since there is a certain degree of randomness in the combination of the optical transmitter and optical receiver modules when a binder module is manufactured, the above 2.6 × 10 module^-4～7.4×10^-6The BER floor values between the two can be regarded as the distribution values of BER floor of the kind of punder.

The BER floor value for the above 5 punders was no longer taken to be the best value (7.4X 10) if done according to the prior art^-6) The worst value (2.6X 10)^-4) Or the average value, the BER floor of the actual optical transmitter and the actual optical receiver under the condition of any combination can not be accurately measured, the error of the Q value can be estimated to be plus or minus 1dB, and the maximum plus or minus 2dB error. Such a large error will bring a great influence on the final result in precision no matter the Q value design in the planning stage of the transmission system or the Q value estimation and prediction of the online network.

In fig. 3, the test result of the test according to the technical solution provided by the present invention is also shown, that is, 1 punder is selected as the reference module, the performance between the optical transmitter and the optical receiver of the other 5 punders is calibrated according to the method of the present invention, and the calibration result is used to calculate any one between the optical transmitter and the optical receiver of the 5 pundersBER floor in case of interconnect. It can be seen from FIG. 3 that the maximum error is 6.6X 10 for the measured value^-3Predicted as a value of 3.3X 10^-6I.e., Q value has 0.37dB error. Compared with the errors of plus or minus 1dB to plus or minus 2dB, which are provided by the first technology and the second technology, the errors provided by the invention are reduced to 37 to 19 percent.

In this embodiment, the contribution value to the Q value and the Q value when the reference optical receiver and the reference optical transmitter are connected in a pairing manner are both stored in the optical receiver and the optical transmitter, so that when the optical receiver and the optical transmitter are connected in a pairing manner, the Q value of the optical receiver and the Q value of the optical transmitter in a pairing connection state are calculated according to the respective contribution values to the Q values, and finally, the corresponding error floor when the optical receiver and the optical transmitter are connected in a pairing manner is calculated according to the corresponding relationship between the Q values and the error floors. The optical transmitter and the optical receiver can be arbitrarily paired, a butted BER floor is provided, and key parameters are provided for the prediction and budget of the pre-FEC BER/Q value in the processes of online opening, tuning and service distribution of the optical transmission system.

In the above solution, when calibrating the first contribution value of the first optical transmitter and the second contribution value of the first optical receiver, the schematic diagrams of the reference optical transmitter and the reference optical receiver and the test performed by using the reference optical transmitter and the reference optical receiver may be as shown in fig. 4 to fig. 6, mainly relating to a factory or an experimental scenario. In an exemplary scenario, fig. 4 is a schematic diagram of a test of a reference optical transmitter and the reference optical receiver; fig. 5 is a schematic diagram of a test of the optical receiver in the reference optical transmitter and the punder module to be calibrated (i.e. the optical receiver to be calibrated, in this embodiment, the first optical receiver is also equivalent to the optical receiver to be calibrated); fig. 6 is a schematic diagram of testing optical transmitters (i.e., optical transmitters to be calibrated, in this embodiment, the first optical transmitter is also equivalent to the optical transmitter to be calibrated) in the reference optical receiver and the punder module to be calibrated. Wherein the TX is used for representing the optical transmitter to be calibrated, the RX is used for representing the optical receiver to be calibrated, and the TX_refFor indicating the reference optical transmitter, the RX_refFor indicating the reference optical receiver. Can understand thatThe coded modulation and reception type of the to-be-calibrated punder module is the same as the coded modulation and reception type of the punder module where the reference optical transmitter and the reference optical receiver are located.

Specifically referring to fig. 7, the working flow of calibrating the first contribution value of the first optical transmitter in the embodiment of the present application is as follows:

701. and when the reference optical transmitter and the reference optical receiver are in a matched connection state, the error code level layer calibration equipment acquires a second error code level layer.

When the reference optical transmitter and the reference optical receiver are connected in a matching manner according to the schematic diagram shown in fig. 4, acquiring a second error code level layer corresponding to the reference optical transmitter and the reference optical receiver by using an error code rate tester; or reading the pre fec BER reported by the reference optical receiver to obtain the second error-level layers corresponding to the reference optical transmitter and the reference optical receiver.

When the error rate tester is used for obtaining the second error code flat layer, the specific process is as follows:

the error rate tester is connected with the optical transmitter through an optical fiber and sends a service signal with a specific frame structure to the optical transmitter to drive the optical transmitter to send an optical signal with a corresponding frame structure. The function of the optical transmitter is to perform electrical-to-optical conversion on the traffic signal and to modulate the traffic signal onto an optical wavelength, which carries the information of the traffic signal. The optical signal is respectively connected with optical devices such as a wave combiner, an adjustable attenuator, a wave splitter and the like through optical fibers and finally connected to an optical receiver. The optical receiver performs operations such as photoelectric conversion reception and data recovery on the optical signal, and finally demodulates the service signal. And the optical receiver transmits the demodulated service signal to the bit error rate tester. The bit error rate tester compares the service signal initially transmitted to the optical transmitter with the service signal received from the optical receiver, calculates the BER and displays and outputs the BER.

702. And the error code level layer calibration equipment calculates the first Q value according to the second error code level layer.

The error floor calibration device calculates the second error floor by using the corresponding relation between the error floor and the Q valueA Q value, wherein the corresponding relation is:

the BER floor₂Is the second error-floor.

703. And when the reference optical receiver and the first optical transmitter are in a matched connection state, the error-level layer calibration equipment acquires a third error-level layer.

When the reference optical receiver and the first optical transmitter (the first optical transmitter is equivalent to the optical transmitter to be calibrated in fig. 6) are connected in a pairing manner according to the schematic diagram shown in fig. 6, acquiring a third error-level layer corresponding to the reference optical receiver and the first optical transmitter by using an error rate tester; or reading the pre fec BER reported by the reference optical receiver to obtain the third error-level layer corresponding to the reference optical receiver and the first optical transmitter.

When the error rate tester is used for obtaining the third error code flat layer, the specific process is as follows:

704. And the error code level layer calibration equipment calculates a third Q value according to the third error code level layer.

The error floor calibration device calculates the third Q value according to the third error floor by using a third formula, where the third formula is:

wherein, Q is_TTE(TX_a,RX_ref) The BER floor is the third Q value corresponding to the first optical transmitter and the reference optical receiver in the pairing connection state₃Is the third error-floor.

705. And the error-level layer calibration equipment calculates a first contribution value according to the third Q value and the first Q value.

The error floor calibration device calculates the first contribution value according to the third Q value and the first Q value by using a fourth formula, where the fourth formula is:

wherein, the

The Q is the first contribution value of the first optical transmitter to the error code level layer in the matched connection state_TTE(TX_a,RX_ref) The third Q value is corresponding to the first optical transmitter and the reference optical receiver in the pairing connection state, and Q is_TTE(TX_ref,RX_ref) The first Q value is corresponding to the first Q value when the reference optical transmitter and the reference optical receiver are in a pairing connection state.

706. The error-floor scaling device stores the first Q value and the first contribution value in the first optical transmitter.

The error-floor scaling device stores the first Q value and the first contribution value in a memory module of the first optical transmitter after determining the first contribution value of the first optical transmitter.

Specifically, referring to fig. 8, the working flow of calibrating the second contribution value of the first optical receiver in the embodiment of the present application is as follows:

801. and when the reference optical transmitter and the reference optical receiver are in a matched connection state, the error code level layer calibration equipment acquires a second error code level layer.

802. And the error code level layer calibration equipment calculates the first Q value according to the second error code level layer.

The error floor calibration device calculates the first Q value by using the corresponding relation between the error floor and the Q value, wherein the corresponding relation is as follows:

the BER floor₂Is the second error-floor.

803. And when the reference optical transmitter and the first optical receiver are in a matched connection state, the error level layer calibration equipment acquires a fourth error level layer.

When the reference optical transmitter and the first optical receiver (the first optical receiver is equivalent to the optical receiver to be calibrated in fig. 5) are connected in a pairing manner according to the schematic diagram shown in fig. 5, acquiring a fourth error-level layer corresponding to the reference optical transmitter and the first optical receiver by using an error rate tester; or reading the pre fec BER reported by the first optical receiver to obtain the fourth error-level layers corresponding to the reference optical transmitter and the first optical receiver.

When the bit error rate tester is used for obtaining the fourth bit error level layer, the specific process is as follows:

the error rate tester is connected with the optical receiver through an optical fiber and sends a service signal with a specific frame structure to the optical receiver to drive the optical receiver to send an optical signal with a corresponding frame structure. The function of the optical receiver is to perform electrical-to-optical conversion on the service signal and modulate the service signal onto an optical wavelength, which carries information of the service signal. The optical signal is respectively connected with optical devices such as a wave combiner, an adjustable attenuator, a wave splitter and the like through optical fibers and finally connected to an optical receiver. The optical receiver performs operations such as photoelectric conversion reception and data recovery on the optical signal, and finally demodulates the service signal. And the optical receiver transmits the demodulated service signal to the bit error rate tester. The bit error rate tester compares the service signal initially transmitted to the optical receiver with the service signal received from the optical receiver, calculates to obtain the BER, and displays and outputs the BER.

804. And the error code level layer calibration equipment calculates a fourth Q value according to the fourth error code level layer.

The error floor calibration device calculates the fourth Q value according to the fourth error floor by using a fifth formula, where the fifth formula is:

wherein, Q is_TTE(TX_ref,RX_b) Is that it isThe third Q value, the BER floor, corresponding to the first optical receiver and the reference optical transmitter in the pairing connection state₄Is the fourth error-floor.

805. And the error-level layer calibration equipment calculates a second contribution value according to the fourth Q value and the first Q value.

The error-floor calibration device calculates the first contribution value according to the fourth Q value and the first Q value by using a sixth formula, where the sixth formula is:

wherein, the

The component of the error floor of the first optical receiver in the matched connection state, namely the second contribution value, Q_TTE(TX_ref,RX_b) The fourth Q value is corresponding to the first optical receiver and the reference optical transmitter in the pairing connection state, Q_TTE(TX_ref,RX_ref) The first Q value is corresponding to the first Q value when the reference optical transmitter and the reference optical receiver are in a pairing connection state.

806. The error-floor calibration device stores the first Q value and the second contribution value in the first optical receiver.

The error-floor calibration device stores the first Q value and the second contribution value in a memory module of the first optical receiver after determining the first contribution value of the first optical receiver.

In this embodiment, because the first optical transmitter and the first optical receiver are applied to an implementation application scenario, the first optical transmitter and the first optical receiver are located in different punder templates, and an optical receiver located in the same punder template as the first optical transmitter may also be calibrated by using the scheme shown in fig. 8, and an optical transmitter located in the same punder template as the first optical receiver may also be calibrated by using the scheme shown in fig. 7.

Meanwhile, in this embodiment, when the same reference optical transmitter and the same reference optical receiver are selected, step 701 to step 702 or step 801 to step 802 may be executed only once, and the first Q value obtained in the above steps may be directly used when all the optical receivers to be calibrated and the optical transmitters to be calibrated are calibrated subsequently.

The above describes the method for calibrating the error floor in the embodiment of the present application, and the following describes the device for calibrating the error floor in the embodiment of the present application.

Specifically referring to fig. 9, the apparatus 900 for calibrating an error floor in the embodiment of the present application includes: an acquisition module 901 and a processing module 902. The error-floor calibration apparatus 900 may be a physical apparatus or may be one or more chips. The device error floor calibration apparatus may be used to perform some or all of the functions in the above-described method embodiments.

For example, the obtaining module 901 may be configured to execute step 201 in the foregoing method embodiment, or configured to execute step 701 and step 703 in the foregoing method embodiment, or configured to execute step 801 and step 803 in the foregoing method embodiment. For example, the obtaining module 901 obtains a first Q value, the first contribution value and the second contribution value when the first optical transmitter and the first optical receiver are in a paired connection state, where the first Q value is a parameter for measuring the signal quality received by the reference optical receiver when the reference optical transmitter and the reference optical receiver are in a paired connection state, the first contribution value is an influence component of the first optical transmitter on the parameter for measuring the signal quality when the first optical transmitter is in the paired connection state, and the second contribution value is an influence component of the first optical receiver on the parameter for measuring the signal quality when the first optical receiver is in the paired connection state;

the processing module 902 may be configured to perform

steps

202 and 203 in the above method embodiment, or to perform

steps

702 and 704 to 705, or to perform

steps

802 and 804 to 805. For example, the processing module 902 calculates a second Q value according to the first Q value, the first contribution value and the second contribution value, where the second Q value is a parameter for measuring the quality of the signal received by the first optical receiver when the first optical transmitter and the first optical receiver are connected in pair; and calculating a first error code level layer when the first optical transmitter is connected with the first optical receiver in a pairing way according to the second Q value.

Optionally, the error floor calibration apparatus 900 further includes a storage module, which is coupled to the processing module, so that the processing module can execute computer execution instructions stored in the storage module to implement the functions of the error floor calibration apparatus in the above method embodiments. In an example, the memory module optionally included in the error floor calibration apparatus 900 may be a memory unit inside the chip, such as a register, a cache, and the like, and the memory module may also be a memory unit located outside the chip, such as a read-only memory (ROM) or another type of static memory device that can store static information and instructions, a Random Access Memory (RAM), and the like.

It should be understood that the flow executed between the modules of the error floor calibration device in the embodiment corresponding to fig. 9 is similar to the flow executed by the error floor calibration device in the corresponding method embodiment of fig. 2 to fig. 8, and details thereof are not repeated here.

Fig. 10 shows a schematic diagram of a possible structure of an error-floor calibration apparatus 1000 in the above embodiment. The error-floor calibration apparatus 1000 may include: a processor 1002, a computer-readable storage medium/memory 1003, a transceiver 1004, an input device 1005, and an output device 1006, and a bus 1001. Wherein the processor, transceiver, computer readable storage medium, etc. are connected by a bus. The embodiments of the present application do not limit the specific connection medium between the above components.

In one example, the transceiver 1004 obtains a first Q value, the first contribution value and the second contribution value when the first optical transmitter and the first optical receiver are in a paired connection state, where the first Q value is a parameter for measuring signal quality received by a reference optical receiver when the reference optical transmitter and the reference optical receiver are in a paired connection state, the first contribution value is an influence component of the first optical transmitter on the parameter for measuring signal quality when the first optical transmitter is in a paired connection state, and the second contribution value is an influence component of the first optical receiver on the parameter for measuring signal quality when the first optical receiver is in a paired connection state;

the processor 1002 calculates a second Q value according to the first Q value, the first contribution value and the second contribution value, where the second Q value is a parameter for measuring the quality of the signal received by the first optical receiver when the first optical transmitter and the first optical receiver are connected in a paired manner; and calculating a first error code level layer when the first optical transmitter is connected with the first optical receiver in a pairing way according to the second Q value.

In one example, the processor 1002 may include baseband circuitry, e.g., may protocol data encapsulation, encoding, etc., of the first error-level layer to generate a data packet. The transceiver 1004 may include a radio frequency circuit to modulate, amplify, etc. the data packets for transmission to the corresponding peer.

In yet another example, the processor 1002 may run an operating system that controls functions between various devices and appliances. The transceiver 1004 may include a baseband circuit and a radio frequency circuit, for example, the data packet may be processed by the baseband circuit and then transmitted to a corresponding peer.

The transceiver 1004 and the processor 1002 may implement corresponding steps in any one of the embodiments of fig. 2 to fig. 8, which are not described herein in detail.

It is understood that fig. 10 only shows a simplified design of the error floor calibration device, and in practical applications, the error floor calibration device may include any number of transceivers, processors, memories, etc., and all of the error floor calibration devices that can implement the present application are within the scope of the present application.

The processor 1002 involved in the apparatus 1000 may be a general-purpose processor, such as a general-purpose Central Processing Unit (CPU), a Network Processor (NP), a microprocessor, etc., or may be an application-specific integrated circuit (ASIC), or one or more integrated circuits for controlling the execution of the program according to the present application. But also a Digital Signal Processor (DSP), a field-programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware components. The controller/processor can also be a combination of computing functions, e.g., comprising one or more microprocessors, DSPs, and microprocessors, among others. Processors typically perform logical and arithmetic operations based on program instructions stored within memory.

The bus 1001 may be a Peripheral Component Interconnect (PCI) bus, an Extended Industry Standard Architecture (EISA) bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in FIG. 10, but this is not intended to represent only one bus or type of bus.

The computer-readable storage medium/memory 1003 referred to above may also hold an operating system and other application programs. In particular, the program may include program code including computer operating instructions. More specifically, the memory may be a read-only memory (ROM), other types of static storage devices that may store static information and instructions, a Random Access Memory (RAM), other types of dynamic storage devices that may store information and instructions, a disk memory, and so forth. The memory 1003 may be a combination of the above memory types. And the computer-readable storage medium/memory described above may be in the processor, may be external to the processor, or distributed across multiple entities including the processor or processing circuitry. The computer-readable storage medium/memory described above may be embodied in a computer program product. By way of example, a computer program product may include a computer-readable medium in packaging material.

Alternatively, embodiments of the present application also provide a general-purpose processing system, such as that commonly referred to as a chip, including one or more microprocessors that provide processor functionality; and an external memory providing at least a portion of the storage medium, all connected together with other supporting circuitry through an external bus architecture. The memory stored instructions, when executed by the processor, cause the processor to perform some or all of the steps of the error floor scaling apparatus in the error floor scaling methods of the embodiments described in fig. 2-8, such as steps 202-203 in fig. 2, and/or other processes for the techniques described herein.

The steps of a method or algorithm described in connection with the disclosure herein may be embodied in hardware or in software instructions executed by a processor. The software instructions may consist of corresponding software modules that may be stored in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium. Of course, the storage medium may also be integral to the processor. The processor and the storage medium may reside in an ASIC. Additionally, the ASIC may reside in user equipment. Of course, the processor and the storage medium may reside as discrete components in user equipment.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be substantially implemented or contributed to by the prior art, or all or part of the technical solution may be embodied in a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.

The above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.

Claims

1. A method for calibrating an error floor, comprising:

when a first optical transmitter and a first optical receiver are in a pairing connection state, acquiring a first Q value, a first contribution value and a second contribution value, wherein the first Q value is a parameter for measuring signal quality when a reference optical transmitter and the reference optical receiver are in pairing connection, the first contribution value is an influence component of the first optical transmitter on the parameter for measuring signal quality when the first optical transmitter is in the pairing connection state, and the second contribution value is an influence component of the first optical receiver on the parameter for measuring signal quality when the first optical receiver is in the pairing connection state;

calculating a second Q value according to the first Q value, the first contribution value and the second contribution value, where the second Q value is a parameter for measuring signal quality when the first optical transmitter and the first optical receiver are in a pairing connection state;

and calculating a first error code level layer when the first optical transmitter is connected with the first optical receiver in a pairing way according to the second Q value.

2. The method of claim 1, wherein calculating a second Q value from the first Q value, the first contribution value, and the second contribution value comprises:

calculating a second Q value corresponding to pairing connection of the first optical transmitter and the first optical receiver by using a first formula according to the first Q value, the first contribution value and the second contribution value;

the first formula is:

wherein, Q is_TTE(TX_a,RX_b) The second Q value is corresponding to the first optical transmitter and the first optical receiver in the pairing connection state, and Q is_TTE(TX_ref,RX_ref) The first Q value is corresponding to the first Q value when the reference optical transmitter and the reference optical receiver are in a pairing connection state

The first contribution value is the influence component of the first optical transmitter on the parameter for measuring the signal quality under the self pairing connection state, namely the first contribution value

And the second contribution value is an influence component of the first optical receiver on a parameter for measuring the signal quality when the first optical receiver is in the pairing connection state.

3. The method of claim 2, wherein calculating a first error floor for the first optical transmitter and the first optical receiver when mated according to the second Q value comprises:

calculating by using a second formula according to the second Q value to obtain a first error code leveling layer when the first optical transmitter is connected with the first optical receiver in a pairing way;

wherein the second formula is:

wherein the BER floor₁For the first error floor, the Q_TTE(TX_a,RX_b) Is the second Q value.

4. The method according to any one of claims 1 to 3, further comprising:

when the reference optical transmitter and the reference optical receiver are in a pairing connection state, acquiring a second error code level layer of the reference optical transmitter and the reference optical receiver;

calculating the first Q value according to the second error code level layer;

when the first optical transmitter and the reference optical receiver are in a pairing connection state, acquiring a third error level layer of the first optical transmitter and the reference optical receiver;

calculating a third Q value corresponding to the first optical transmitter and the reference optical receiver according to the third error level;

calculating the first contribution value according to the first Q value and the third Q value;

storing the first Q value and the first contribution value at the first optical transmitter.

5. The method of claim 4, wherein calculating a third Q value for the first optical transmitter and the reference optical receiver according to the third error-level layer comprises:

calculating a third Q value corresponding to the first optical transmitter and the reference optical receiver by using a third formula according to the third error code level layer;

the third formula is:

6. The method of claim 5, wherein calculating the first contribution value of the first optical transmitter to the third error-leveling layer from the first Q value and the third Q value comprises:

calculating a first contribution value of the first optical transmitter to the third error-leveling layer by using a fourth formula according to the first Q value and the third Q value;

the fourth formula is:

wherein, the

The Q is an influence component of the first optical transmitter on a parameter for measuring signal quality in a paired connection state, namely a first contribution value_TTE(TX_a,RX_ref) The third Q value is corresponding to the first optical transmitter and the reference optical receiver in the pairing connection state, and Q is_TTE(TX_ref,RX_ref) The first Q value is corresponding to the reference optical transmitter and the reference optical receiver in a pairing connection state;

wherein, the

The BER floor₂Is the second error-floor.

7. The method of any of claims 4 to 6, wherein the obtaining the third error-level layers of the first optical transmitter and the reference optical receiver comprises:

and reading the third error level layer reported by the reference optical receiver.

8. The method according to any one of claims 1 to 7, further comprising:

calculating the first Q value corresponding to the reference optical transmitter and the reference optical receiver according to the second error code level layer;

when the first optical receiver and the reference optical transmitter are in a pairing connection state, acquiring a fourth error level layer of the first optical receiver and the reference optical transmitter;

calculating a fourth Q value corresponding to the first optical receiver and the reference optical transmitter according to the fourth error level;

calculating the second contribution value according to the first Q value and the fourth Q value;

storing the first Q value and the second contribution value at the first optical receiver.

9. The method of claim 8, wherein calculating a fourth Q value for the first optical receiver corresponding to the reference optical transmitter based on the fourth error-level layer comprises:

calculating a fourth Q value corresponding to the first optical receiver and the reference optical transmitter by using a fifth formula according to the fourth error code level layer;

the fifth formula is:

10. The method of claim 9, wherein the calculating the second contribution value from the first Q value and the fourth Q value comprises:

calculating a second contribution value of the first optical receiver to the fourth error-leveling layer by using a sixth formula according to the first Q value and the fourth Q value;

the sixth formula is:

wherein, the

For the second contribution, the Q_TTE(TX_ref,RX_b) The fourth Q value is corresponding to the first optical receiver and the reference optical transmitter in the pairing connection state, Q_TTE(TX_ref,RX_ref) The first Q value is corresponding to the reference optical transmitter and the reference optical receiver in a pairing connection state;

wherein, the

The BER floor₂For indicating the second error-floor.

11. The method of any of claims 8 to 10, wherein obtaining the fourth error-level layers for the first optical receiver and the reference optical transmitter comprises:

and reading the fourth error level layer reported by the first optical receiver.

12. The method of any of claims 1 to 11, wherein the reference optical transmitter and the reference optical receiver are an integrated optical transceiver;

or the like, or, alternatively,

the reference optical transmitter and the reference optical receiver are respectively included in different optical transceivers.

13. An error floor calibration device, comprising:

an obtaining module, configured to obtain a first Q value, a first contribution value, and a second contribution value when a first optical transmitter and a first optical receiver are in a paired connection state, where the first Q value is a parameter for measuring signal quality when the reference optical transmitter and the reference optical receiver are in a paired connection state, the first contribution value is an influence component of the first optical transmitter on the parameter for measuring signal quality when the first optical transmitter is in the paired connection state, and the second contribution value is an influence component of the first optical receiver on the parameter for measuring signal quality when the first optical receiver is in the paired connection state;

14. The device according to claim 13, wherein the processing module is specifically configured to calculate, according to the first Q value, the first contribution value, and the second contribution value, a second Q value corresponding to the pairing connection between the first optical transmitter and the first optical receiver by using a first formula;

the first formula is:

wherein, Q is_TTE(TX_a,RX_b) For the second Q value when the first optical transmitter is connected with the first optical receiver in a pairing manner, the Q_TTE(TX_ref,RX_ref) For the first Q value when the reference optical transmitter is connected with the reference optical receiver in a pairing manner, the

The first contribution value is the influence component of the first optical transmitter on the error-level layer in the pairing connection state, namely the first contribution value

The second contribution value is a component of the error-level layer of the first optical receiver in the paired connection state.

15. The device according to claim 14, wherein the processing module is specifically configured to calculate, according to the second Q value, a first error-level layer when the first optical transmitter and the first optical receiver are connected in a pairing manner by using a second formula;

wherein the second formula is:

16. The apparatus according to any one of claims 13 to 15, wherein the obtaining module is further configured to obtain a second error-level layer of the reference optical transmitter and the reference optical receiver when the reference optical transmitter and the reference optical receiver are in a paired connection state;

the processing module is further configured to calculate the first Q value according to the second error floor;

the obtaining module is further configured to obtain a third error floor of the first optical transmitter and the reference optical receiver when the first optical transmitter and the reference optical receiver are in a pairing connection state;

the processing module is further configured to calculate a third Q value corresponding to the first optical transmitter and the reference optical receiver according to the third error level layer; calculating the first contribution value according to the first Q value and the third Q value;

the apparatus also includes a storage module to store the first Q value and the first contribution value at the first optical transmitter.

17. The apparatus of claim 16, wherein the processing module is specifically configured to calculate a third Q value corresponding to the first optical transmitter and the reference optical receiver according to the third error-level layer by using a third formula;

the third formula is:

18. The apparatus of claim 17, wherein the processing module is specifically configured to calculate a first contribution value of the first optical transmitter to the third error-level layer according to the first Q value and the third Q value by using a fourth formula;

the fourth formula is:

wherein, the

The Q is the first contribution value of the first optical transmitter to the error code level layer in the matched connection state_TTE(TX_a,RX_ref) Is a stand forThe third Q value corresponding to the first optical transmitter and the reference optical receiver in the pairing connection state, Q_TTE(TX_ref,RX_ref) The first Q value is corresponding to the reference optical transmitter and the reference optical receiver in a pairing connection state;

wherein, the

The BER floor₂Is the second error-floor.

19. The device according to any one of claims 16 to 18, wherein the obtaining module is specifically configured to read the third error-level layer reported by the reference optical receiver.

20. The apparatus according to any one of claims 13 to 19, wherein the obtaining module is further configured to obtain a second error-level layer of the reference optical transmitter and the reference optical receiver when the reference optical transmitter and the reference optical receiver are in a paired connection state;

the processing module is further configured to calculate the first Q value corresponding to the reference optical transmitter and the reference optical receiver according to the second error level layer;

the obtaining module is further configured to obtain a fourth error floor of the first optical receiver and the reference optical transmitter when the first optical receiver and the reference optical transmitter are in a pairing connection state;

the processing module is further configured to calculate a fourth Q value corresponding to the first optical receiver and the reference optical transmitter according to the fourth error level layer; calculating the second contribution value according to the first Q value and the fourth Q value;

the apparatus also includes a storage module to store the first Q value and the second contribution value at the first optical receiver.

21. The apparatus of claim 19, wherein the processing module is specifically configured to calculate a fourth Q value corresponding to the reference optical transmitter and the first optical receiver according to the fourth error-leveling layer by using a fifth formula;

the fifth formula is:

22. The apparatus of claim 21, wherein the processing module is specifically configured to calculate a second contribution value of the first optical receiver to the fourth error-leveling layer according to the first Q value and the fourth Q value by using a sixth formula;

the sixth formula is:

wherein, the

The component of the error floor of the first optical receiver in the matched connection state, namely the second contribution value, Q_TTE(TX_ref,RX_b) The fourth Q value is corresponding to the first optical receiver and the reference optical transmitter in the pairing connection state, Q_TTE(TX_ref,RX_ref) The first Q value is corresponding to the reference optical transmitter and the reference optical receiver in a pairing connection state;

wherein, the

The BER floor₂For indicating the second error-floor.

23. The device according to any one of claims 20 to 22, wherein the obtaining module is specifically configured to read the fourth error-level layer reported by the first optical receiver.

24. The apparatus of any of claims 13 to 23, wherein the reference optical transmitter and the reference optical receiver are an integrated optical transceiver;

or the like, or, alternatively,

25. An error floor calibration device is characterized by comprising a processor and a memory;

the memory stores computer instructions;

the processor invokes the computer instructions to cause the error floor calibration device to perform the method of any of the preceding claims 1 to 12.

26. A computer-readable storage medium having stored thereon computer instructions which, when executed on a computer, cause the computer to perform the method of any of claims 1 to 12.

27. A computer program product comprising a program which, when run on a computer, causes the computer to perform the method of any one of claims 1 to 12.

28. An optical communication system comprising the error-floor calibration apparatus of any one of claims 13 to 25 and the first optical transmitter and the first optical receiver of any one of claims 1 to 12.