CN116132245A - 5G forwarding device management information monitoring method and device - Google Patents

Abstract

The invention relates to a 5G forwarding device management information monitoring method and a device, wherein the method comprises the following steps: modulating an OAM frame containing management information of an optical module into an OAM carrier signal at an OAM physical layer transmitting end, and converting the OAM carrier signal and a service signal into an optical signal for transmission after superposition; the method comprises the steps of converting a received optical signal into an electric signal at an OAM physical layer receiving end, dividing the electric signal into a plurality of branch signals, and demodulating each branch signal to obtain OAM carrier signals with different carrier frequencies; and decoding the OAM carrier signal to obtain management information of the corresponding tributary signal. Management information can be detected and analyzed through a frequency modulation mode, and monitoring of different module management information by a single PD can be achieved.

Description

A method and device for monitoring management information of 5G fronthaul equipment

technical field

The present invention relates to the field of communication technology, in particular to a method and device for monitoring management information of 5G fronthaul equipment.

Background technique

In the 5G network, the access network is reconstructed into the following three functional entities: CU (Centralized Unit, centralized unit), DU (Distributed Unit, distributed unit), AAU (Active Antenna Unit, active antenna unit). In a 5G network, the part of AAU connected to DU is called 5G Fronthaul, Middlehaul refers to the part of DU connected to CU, and Backhaul is the communication bearer between CU and core network.

With the demand for lightweight OAM in the 5G fronthaul network and the management and controllability of the business, it is necessary to be able to monitor the optical modules on the AAU side and the DU side in real time. The mainstream solution adopted in the related art is to encode the local information into binary, and then represent the digital information 1 and 0 by controlling the output current of the electronic chip in the optical module. This method of transmitting module information by controlling the amplitude of the modulation current is called amplitude modulation mode. The amplitude modulation mode is relatively simple to implement, but the information of each module must be detected by a separate PD (photodetector), so the detection cost is high and the integration level is poor.

Contents of the invention

Embodiments of the present invention provide a method and device for monitoring management information of 5G fronthaul equipment, which detects and analyzes management information through frequency modulation mode, and realizes monitoring management information of different modules by a single PD.

On the one hand, an embodiment of the present invention provides a method for monitoring management information of 5G fronthaul equipment, which is characterized in that it includes the steps of:

Modulate the OAM frame containing the management information of the optical module into an OAM carrier signal at the OAM physical layer sending end, and convert the OAM carrier signal into an optical signal after superimposing the service signal;

At the receiving end of the OAM physical layer, the received optical signal is converted into an electrical signal and then divided into multiple branch signals, and each branch signal is demodulated to obtain OAM carrier signals of different carrier frequencies;

Decoding the OAM carrier signal to obtain management information of the corresponding tributary signal.

In some embodiments, the modulation includes the steps of:

Converting the OAM frame into a binary bit stream and performing Manchester encoding;

The coded data stream is serial-to-parallel converted with each 2-bit data as a symbol to obtain two output signals;

The two output signals are modulated according to a preset modulation frequency to obtain an OAM carrier signal.

In some embodiments, during the serial-to-parallel conversion, two output signals are obtained based on a preset mapping relationship, and the preset mapping relationship is used to make the amplitude of the OAM carrier signal 1.

In some embodiments, the preset mapping relationship includes:

s(t)=Acos(wt+θ),

Wherein, A is the output amplitude, θ=2π*i/M (i=2,3...,M, M is 2n, and n is the number of bits contained in a symbol).

In some embodiments, the modulation of the two output signals according to a preset modulation frequency to obtain an OAM carrier signal includes the steps of:

According to the modulation according to the first formula, the first formula includes:

s(t)=I*sinwt-Q*coswt, wherein, s(t) is the modulated carrier signal, I is the first output signal, Q is the second output signal, and w is the preset modulation frequency.

In some embodiments, the demodulation includes the steps of:

Obtain the modulated carrier signal corresponding to each branch signal;

After demodulating the modulated carrier signal corresponding to each branch signal according to the preset modulation frequency corresponding to the branch, two parallel signal strings are obtained;

The OAM carrier signal is acquired based on the parallel signal string, the OAM carrier signal is a serial binary code stream and the OAM carrier signals corresponding to different branch signals have different carrier frequencies.

In some embodiments, the demodulation according to the preset modulation frequency corresponding to the branch includes the steps of:

After multiplying the modulated carrier signal s(t) by cos(n+1)ω ₀ t, the first parallel signal a _n is obtained through the integration circuit;

After multiplying the modulated carrier signal s(t) by sin(n+1)ω ₀ t, the second parallel signal b _n is obtained through the integration circuit;

(n+1)ω ₀ is the preset modulation frequency of the nth branch, ω ₀ is the modulation frequency interval of adjacent wavelengths, and the value of n ranges from 1 to the total number of branches.

In some embodiments, the decoding of the OAM carrier signal according to the encoding rule of the sending end to obtain the management information of the corresponding branch signal includes the steps of:

Sampling the OAM carrier signal and determining the transition edge of the OAM carrier signal;

The validity of the transition edges is judged, and the transition edges judged to be valid are decoded to obtain management information of corresponding branch signals.

In some embodiments, when judging the validity of the jump edge, the steps include:

If Δt _m is greater than T, it is determined that the m+1th jump edge is valid,

If Δt _m is less than or equal to T, and the mth jump edge is valid, then the m+1th jump edge is invalid,

If Δt _m is less than or equal to T, and the mth jump edge is invalid, and the m-1th jump edge is valid, then the mth jump edge is valid,

Wherein, Δt _m is the time interval between the occurrence moments of the mth transition edge and the (m+1)th transition edge of the OAM carrier signal.

In the second aspect, the embodiment of the present invention also provides a 5G fronthaul equipment management information monitoring device, which is characterized in that it includes:

A modulation module, which is used to modulate the OAM frame containing the management information of the optical module into an OAM carrier signal at the OAM physical layer sending end, and convert the OAM carrier signal into an optical signal after superimposing the service signal;

A demodulation module, which is used to convert the received optical signal into an electrical signal at the OAM physical layer receiving end and divide it into a plurality of branch signals and demodulate each branch signal respectively to obtain OAM carrier signals of different carrier frequencies;

The decoding module is configured to decode the OAM carrier signal to obtain management information of the corresponding branch signal.

The embodiment of the present invention provides a method and device for monitoring management information of 5G fronthaul equipment. The frequency modulation mode is used to detect and analyze the management information. By receiving the top tuning information of different carrier frequencies and simplifying the decoding process, a single photodiode PD can detect For the tuning information of different modules, a simple mcu module can complete the decoding. Therefore, it is easy to realize the expansion of the top tuning information of more wavelengths, and the integration of the multiplexing and demultiplexing discs is higher and the cost is lower.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained based on these drawings without creative effort.

FIG. 1 is a schematic flow diagram of a method for monitoring management information of 5G fronthaul equipment provided by an embodiment of the present invention;

2 is a schematic structural diagram of a 5G fronthaul device management information monitoring device provided by an embodiment of the present invention;

FIG. 3 is a schematic diagram of the operation of the OAM physical layer sending end provided by the embodiment of the present invention;

4 is a schematic diagram of the mapping and adjustment of the MCU module provided by the embodiment of the present invention;

FIG. 5 is a schematic diagram of an application scenario for monitoring management information of 5G fronthaul equipment provided by an embodiment of the present invention;

Fig. 6 is a working schematic diagram of the detection module provided by the embodiment of the present invention;

Fig. 7 is a working diagram of the demodulation module provided by the embodiment of the present invention;

Fig. 8 is a device for monitoring management information of 5G fronthaul equipment provided by an embodiment of the present invention.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

As shown in Figure 1, an embodiment of the present invention provides a method for monitoring management information of 5G fronthaul equipment, including steps:

S100: Modulate the OAM frame containing the management information of the optical module into an OAM carrier signal at the OAM physical layer sending end, and convert the OAM carrier signal and the service signal into an optical signal after being superimposed;

S200: At the OAM physical layer receiving end, the received optical signal is converted into an electrical signal and then divided into a plurality of branch signals, and each branch signal is respectively demodulated to obtain OAM carrier signals of different carrier frequencies;

S300: Decode the OAM carrier signal to obtain management information of the corresponding tributary signal.

It can be understood that, as shown in Figure 2, the OAM function between the AAU and DU of the 5G fronthaul equipment is mainly composed of the OAM application layer and the OAM physical layer. The OAM application layer realizes the encapsulation and decapsulation functions of OAM frames, and realizes functions such as optical module status monitoring and link fault location. The OAM physical layer implements physical layer processing of OAM data, that is, modulation and demodulation of the physical layer.

Preferably, the modulation comprises the steps of:

S110: convert the OAM frame into a binary bit stream and perform Manchester encoding;

S120: Obtain two output signals after serial-to-parallel conversion of the encoded data stream with every 2bit data as a symbol;

S130: Modulate the two output signals according to a preset modulation frequency to obtain an OAM carrier signal.

It should be noted that the Manchester encoding method represents the value bit by changing the level. There is a jump in the middle of each bit. A jump from low to high means '0', and a jump from high to low means '1' , that is, the data bit '0' is represented by the level "01", and the data bit '1' is represented by the level "10".

Further, during the serial-to-parallel conversion in S120, two output signals are obtained based on a preset mapping relationship, and the preset mapping relationship is used to make the amplitude of the OAM carrier signal 1.

Preferably, the preset mapping relationship includes:

s(t)=Acos(wt+θ),

Wherein, A is the output amplitude, θ=2π*i/M (i=2,3...,M, M is 2n, and n is the number of bits contained in a symbol).

For example, when M is 4, n is 2, and the value of A is 1, so based on the preset mapping relationship, you can get:

第二路输出信号为

If the symbol is 00, the first output signal is

The second output signal is

第二路输出信号为

If the symbol is 01, the first output signal is

The second output signal is

第二路输出信号为

If the symbol is 11, the first output signal is

The second output signal is

第二路输出信号为

If the symbol is 10, the first output signal is

The second output signal is

In some embodiments, S130 performs modulation according to a first formula, and the first formula includes:

s(t)=I*sinwt-Q*coswt, wherein, s(t) is the modulated carrier signal, I is the first output signal, Q is the second output signal, and w is the preset modulation frequency.

Preferably, in order to prevent mutual interference, the value of the preset modulation frequency w is between 10 kHz and 1 MHz, and the modulation frequencies of adjacent wavelengths are separated by 20 kHz.

In some embodiments, the demodulation in S200 includes the steps of:

S210: Obtain the modulated carrier signal corresponding to each branch signal;

S220: After demodulating the modulated carrier signal corresponding to each branch signal according to the preset modulation frequency corresponding to the branch, two parallel signal strings are obtained;

S230: Acquire an OAM carrier signal based on the parallel signal string, where the OAM carrier signal is a serial binary code stream and the OAM carrier signals corresponding to different branch signals have different carrier frequencies.

Further, performing demodulation according to the preset modulation frequency corresponding to the branch in S220 includes steps:

S221: After multiplying the modulated carrier signal s(t) by cos(n+1)ω ₀ t, the first parallel signal a _n is obtained through the integrating circuit;

S222: After multiplying the modulated carrier signal s(t) by sin(n+1)ω ₀ t, the second parallel signal b _n is obtained through the integrating circuit;

Among them, (n+1)ω ₀ is the preset modulation frequency of the nth branch, ω ₀ is the modulation frequency interval of adjacent wavelengths, and the value of n ranges from 1 to the total number of branches.

It should be noted that the carrier frequency here is (n+1)ω ₀ , only the carrier signal of this frequency can be demodulated, and the carriers of other frequencies will be 0 after integration. ω ₀ is the modulation frequency interval of adjacent wavelengths. That is, the carrier frequency of the demodulated signal corresponding to the first branch is 2ω ₀ , the carrier frequency of the demodulated signal corresponding to the second branch is 3ω ₀ , and so on. If the value of ω ₀ is 20kHz, the first branch corresponds to the demodulated signal carrier frequency of 40kHz, the second branch corresponds to the demodulated signal carrier frequency of 60kHz, and so on.

In some embodiments, S300 includes the steps of:

S310: Sampling the OAM carrier signal and determining the transition edge of the OAM carrier signal;

S320: Judging the validity of the transition edge and decoding the transition edge judged to be valid to obtain management information of the corresponding branch signal.

It should be noted that since this embodiment adopts Manchester encoding, the encoding module cannot accurately identify the start and end points of each "0" or "1", so multiple transition edges may be generated in the corresponding period. However, this encoding characteristic will lead to a large number of invalid transition edges in the Manchester encoded signal corresponding to the continuous "0" or "1" binary code stream. Therefore, it is necessary to determine whether each jump edge is valid when decoding.

Further, when judging the validity of the jump edge, according to the following judging rules:

If Δt _m is greater than T, it is determined that the m+1th jump edge is valid,

If Δt _m is less than or equal to T, and the mth jump edge is valid, then the m+1th jump edge is invalid,

If Δt _m is less than or equal to T, and the mth jump edge is invalid, and the m-1th jump edge is valid, then the mth jump edge is valid,

Wherein, Δt _m is the time interval between the occurrence moments of the mth transition edge and the (m+1)th transition edge of the OAM carrier signal.

It can be understood that, in this embodiment, whether the transition edge is valid is determined based on the relationship between the time interval between two adjacent transition edges and the preset clock cycle threshold. The received OAM carrier signal is formed based on Manchester encoding. The time interval between every two level transitions during encoding is the clock cycle of Manchester encoding. The clock period can be obtained by calculating the average value of time intervals between two jump edges of the sampling data clock, or by preconfiguring. Comparing the time interval between two jump edges after sampling with the clock cycle threshold T, it can be determined whether the jump edge is valid . The clock period threshold T can be determined by the clock period of the Manchester encoding, and is generally the clock period of the Manchester encoding×0.6.

In this embodiment, by identifying the transition edges of the OAM carrier signal and screening out the effective transition edges, it is possible to effectively suppress a large amount of invalid data resulting from decoding due to bit errors and signal glitches, so that the decoded data can be obtained more accurately. The data. Therefore, the accuracy and effectiveness of the decoded data can be improved, and the decoding process can be realized by a low-cost single-chip microcomputer due to the simplification of the decoding process, without using a dedicated chip or FPGA, thereby reducing hardware costs.

In some embodiments, when performing frame verification on the obtained corresponding branch signal management information, the valid information part is verified, and the filling part is not included in the verification;

The valid information includes module ID, frame length and message content, wherein the message content includes module current, voltage, temperature, transceiver power, TEC temperature and alarm information.

In some embodiments, before the demodulation of each branch signal, a millivolt-level carrier signal is extracted from the current signal through low-frequency filtering and shaping amplification, and the millivolt-level carrier signal is used as a solution tuned input.

As shown in FIG. 3 , in a specific embodiment, the OAM physical layer sending end includes an MCU module and a driver module, wherein the MCU module includes an encapsulation module, a mapping module and a modulation module. Specifically, the encapsulation module encapsulates the management information of the optical module into an OAM frame, wherein the management information is such as DDM information (including module current, voltage, temperature, transceiver power, TEC temperature, alarm, etc.), and then transfers the OAM frame to into a binary bit stream and Manchester encoded and then input to the mapping module. As shown in Figure 4, the mapping module forms each 2bit data (s 1, s0) into a symbol, after serial-to-parallel conversion, s1 is output to the I channel, and s 0 is output to the Q channel. The mapping relationship is shown in Table 1, which can ensure that the output amplitude is 1.

Table 1

Further, the modulation module performs modulation according to s(t)=I*sinwt-Q*coswt. Among them, ω represents the modulation frequency, I and Q represent the signals input by the I channel and the Q channel respectively, s(t) is the modulated OAM carrier signal, and s(t) is input to the drive module. The driver module superimposes the modulated OAM carrier signal carrying OAM information on the service signal, and then converts it into an optical signal and transmits it to the multiplexer/demultiplexer module.

In a specific embodiment, the receiving end of the OAM physical layer can be connected to the PD module after being split by the optical splitter, and the optical signal is converted into a current signal according to the light intensity and output to the detection module as shown in Figure 5, which can monitor the AAU at the same time Optical modules and link status on the side and DU side. As shown in Figure 6, after the detection module receives the current signal, it extracts the millivolt-level low-frequency carrier signal from the current signal through low-frequency filtering and shaping amplification, and then outputs it to the demodulation module in parallel. The low-frequency carrier signal is formed by the superposition of multiple OAM carriers with different modulation frequencies, which can be expressed as: S'(t)=acosω ₀ t-bs inω ₀ t+a ₁ cos2ω ₀ tb ₁ sin2ω ₀ t+a ₂ cos3ω ₀ tb ₂ s in3ω ₀ t+…+a _n cos(n+1)ω ₀ tb _n s in(n+1)ω ₀ t, where, a _n cos(n+1)ω ₀ tb _n sin(n+1 )ω ₀ t is the nth OAM carrier signal, and (n+1)ω ₀ represents the modulation frequency.

Further, as shown in Fig. 7, the demodulation module firstly multiplies the signal sS'(t) by the carrier cos(n+1)ω ₀ t by using the orthogonality of the carrier, and then obtains the signal a _n through the integrating circuit. At the same time, the signal S'(t) is multiplied by the carrier sin(n+1)ω ₀ t, and then the signal b _n is obtained through the integrating circuit. The OAM carrier signals of other modulation frequencies in S'(t) get 0 after passing through the integrating circuit (that is, they are filtered out), thus obtaining two bit information a _n , b _n . Such isochronously output symbols are called a symbol. Each demodulated symbol contains two parallel output bit information a _n , b _n . After parallel-to-serial conversion and amplitude conversion (demapping), the serial binary code stream is obtained and sent to the MCU module for deframing.

In some embodiments, at the OAM application layer, the OAM frame format adopts fixed-length frame encapsulation. The length of each fixed-length frame is 64 bytes, and OAM information is filled into the fixed-length frame. The idle part of the fixed-length frame is filled with a predefined stuffing code, which is not included in the information length. During OAM frame verification, the effective information part is verified, and the filling part is not included in the verification. The OAM frame format is shown in Table 2.

Table 2

Among them, 0x7E7E7E represents the frame header mark, 0x7E represents the frame end mark, the module ID can be filled in the DU side module-0x1～0xc and the AAU side module-0x81～0x8c, the frame length can be filled in the message content length, and the frame check is used according to CRC8 polynomial X ⁸ +X ⁵ +X ⁴ +1 calculation and verification range includes module ID, frame length and message content, and the message content can be filled in the DDM information of the optical module, including the current, voltage, temperature, and transceiver power of the module , TEC temperature, alarm and other information. In addition, padding items are used to fill free byte 0.

It can be understood that the AAU-side optical module and the DU-side optical module can send OAM frames at a rate of 1 frame per second. After the detection module receives the data stream, it first checks whether the first 3 bytes and the 64th byte are 0x7E, so as to judge whether it is an OAM frame. If not, it is discarded, and if it is, the OAM frame is received and analyzed. After parsing the module ID, if a certain line does not receive an OAM frame for 10 consecutive seconds, it is judged that the line is disconnected and an alarm is reported to the central office equipment. Analyze the frame check code and filling content. If there are errors in 3 consecutive frames on a certain line, it is considered that there is an error code on the line, and an alarm is reported to the central office device. If there is no problem with the above verification, then analyze the content of the message, obtain the status of the optical module, and report it to the network management of the central office equipment.

As shown in Figure 8, the embodiment of the present invention also provides a 5G fronthaul equipment management information monitoring device, which is characterized in that it includes:

A modulation module, which is used to modulate the OAM frame containing the management information of the optical module into an OAM carrier signal at the OAM physical layer sending end, and convert the OAM carrier signal into an optical signal after superimposing the service signal;

A demodulation module, which is used to convert the received optical signal into an electrical signal at the OAM physical layer receiving end and divide it into a plurality of branch signals and demodulate each branch signal respectively to obtain OAM carrier signals of different carrier frequencies;

The decoding module is configured to decode the OAM carrier signal to obtain management information of the corresponding branch signal.

In some embodiments, the modulation module is used to:

Converting the OAM frame into a binary bit stream and performing Manchester encoding;

After the coded data stream is serial-to-parallel converted with each 2bit data as a symbol, two output signals are obtained;

The two output signals are modulated according to a preset modulation frequency to obtain an OAM carrier signal.

It should be noted that the Manchester encoding method represents the value bit by changing the level. There is a jump in the middle of each bit. A jump from low to high means '0', and a jump from high to low means '1' , that is, the data bit '0' is represented by the level "01", and the data bit '1' is represented by the level "10".

Further, the modulation module obtains two output signals based on a preset mapping relationship during the serial-to-parallel conversion, and the preset mapping relationship is used to make the amplitude of the OAM carrier signal 1.

Preferably, the preset mapping relationship includes:

s(t)=Acos(wt+θ),

Wherein, A is the amplitude of the output, θ=2π*i/M (i=2,3...,M, M is 2n, and n is the bit number contained in a symbol).

In some embodiments, the modulation module performs modulation according to a first formula, and the first formula includes:

s(t)=I*sinwt-Q*coswt, wherein, s(t) is the modulated carrier signal, I is the first output signal, Q is the second output signal, and w is the preset modulation frequency.

Preferably, in order to prevent mutual interference, the value of the preset modulation frequency w is between 10 kHz and 1 MHz, and the modulation frequencies of adjacent wavelengths are separated by 20 kHz.

In some embodiments, the demodulation module is used for:

Obtain the modulated carrier signal corresponding to each branch signal;

After demodulating the modulated carrier signal corresponding to each branch signal according to the preset modulation frequency corresponding to the branch, two parallel signal strings are obtained;

The OAM carrier signal is acquired based on the parallel signal string, the OAM carrier signal is a serial binary code stream and the OAM carrier signals corresponding to different branch signals have different carrier frequencies.

Further, the demodulation module is also used to demodulate according to the preset modulation frequency corresponding to the branch, specifically including:

After multiplying the modulated carrier signal s(t) by cos(n+1)ω ₀ t, the first parallel signal a _n is obtained through the integration circuit;

After multiplying the modulated carrier signal s(t) by sin(n+1)ω ₀ t, the second parallel signal b _n is obtained through the integrating circuit;

Among them, (n+1)ω ₀ is the preset modulation frequency of the nth branch, ω ₀ is the modulation frequency interval of adjacent wavelengths, and the value of n ranges from 1 to the total number of branches.

In some embodiments, the decoding module is used to:

Sampling the OAM carrier signal and determining the transition edge of the OAM carrier signal;

The validity of the transition edges is judged, and the transition edges judged to be valid are decoded to obtain management information of corresponding branch signals.

Further, when judging the validity of the jump edge, according to the following judging rules:

If Δt _m is greater than T, it is determined that the m+1th jump edge is valid,

If Δt _m is less than or equal to T, and the mth jump edge is valid, then the m+1th jump edge is invalid,

If Δt _m is less than or equal to T, and the mth jump edge is invalid, and the m-1th jump edge is valid, then the mth jump edge is valid,

Wherein, Δt _m is the time interval between the occurrence moments of the mth transition edge and the (m+1)th transition edge of the OAM carrier signal.

Those of ordinary skill in the art can understand that all or some of the steps in the methods disclosed above, the functional modules/units in the system, and the device can be implemented as software, firmware, hardware, and an appropriate combination thereof. In a hardware implementation, the division between functional modules/units mentioned in the above description does not necessarily correspond to the division of physical components; for example, one physical component may have multiple functions, or one function or step may be composed of several physical components. Components cooperate to execute. Some or all of the physical components may be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application-specific integrated circuit . Such software may be distributed on computer-readable storage media, which may include computer-readable storage media (or non-transitory media) and communication media (or transitory media).

It should be noted that in the present invention, relative terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply There is no such actual relationship or order between these entities or operations. Furthermore, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus comprising a set of elements includes not only those elements, but also includes elements not expressly listed. other elements of or also include elements inherent in such a process, method, article, or device. Without further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article or apparatus comprising said element.

The above descriptions are only specific embodiments of the present invention, so that those skilled in the art can understand or implement the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Accordingly, the present invention will not be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims (10)

1. A 5G fronthaul equipment management information monitoring method, is characterized in that, it comprises steps: Modulate the OAM frame containing the management information of the optical module into an OAM carrier signal at the OAM physical layer sending end, and convert the OAM carrier signal into an optical signal after superimposing the service signal; At the receiving end of the OAM physical layer, the received optical signal is converted into an electrical signal and then divided into multiple branch signals, and each branch signal is demodulated to obtain OAM carrier signals of different carrier frequencies; Decoding the OAM carrier signal to obtain management information of the corresponding tributary signal. 2. A method for monitoring management information of 5G fronthaul equipment as claimed in claim 1, wherein said modulation comprises the steps of: Converting the OAM frame into a binary bit stream and performing Manchester encoding; The coded data stream is serial-to-parallel converted with each 2-bit data as a symbol to obtain two output signals; The two output signals are modulated according to a preset modulation frequency to obtain an OAM carrier signal. 3. A method for monitoring management information of 5G fronthaul equipment according to claim 2, wherein, during the serial-to-parallel conversion, two output signals are obtained based on a preset mapping relationship, and the preset mapping relationship is used to make the The amplitude of the OAM carrier signal is 1. 4. A method for monitoring management information of 5G fronthaul equipment according to claim 3, wherein the preset mapping relationship includes: s(t)=Acos(wt+θ), Wherein, A is the output amplitude, θ=2π*i/M (i=2,3...,M, M is 2n, and n is the number of bits contained in a symbol). 5. A method for monitoring management information of 5G fronthaul equipment according to any one of claims 2 to 4, wherein said two-way output signal is modulated according to a preset modulation frequency to obtain an OAM carrier signal, comprising step: According to the modulation according to the first formula, the first formula includes: s(t)=I*sinwt-Q*coswt, wherein, s(t) is the modulated carrier signal, I is the first output signal, Q is the second output signal, and w is the preset modulation frequency. 6. A method for monitoring management information of 5G fronthaul equipment as claimed in claim 5, wherein said demodulation comprises the steps of: Obtain the modulated carrier signal corresponding to each branch signal; After demodulating the modulated carrier signal corresponding to each branch signal according to the preset modulation frequency corresponding to the branch, two parallel signal strings are obtained; The OAM carrier signal is acquired based on the parallel signal string, the OAM carrier signal is a serial binary code stream and the OAM carrier signals corresponding to different branch signals have different carrier frequencies. 7. A method for monitoring management information of 5G fronthaul equipment as claimed in claim 6, wherein said demodulating according to the preset modulation frequency corresponding to the branch comprises the steps of: After multiplying the modulated carrier signal s(t) by cos(n+1)ω ₀ t, the first parallel signal a _n is obtained through the integration circuit; After multiplying the modulated carrier signal s(t) by sin(n+1)ω ₀ t, the second parallel signal b _n is obtained through the integrating circuit; (n+1)ω ₀ is the preset modulation frequency of the nth branch, ω ₀ is the modulation frequency interval of adjacent wavelengths, and the value of n ranges from 1 to the total number of branches. 8. A method for monitoring management information of 5G fronthaul equipment according to claim 1, wherein said decoding the OAM carrier signal according to the coding rules of the transmitting end to obtain the management information of the corresponding branch signal comprises the steps of: Sampling the OAM carrier signal and determining the transition edge of the OAM carrier signal; The validity of the transition edges is judged, and the transition edges judged to be valid are decoded to obtain management information of corresponding branch signals. 9. A method for monitoring management information of 5G fronthaul equipment as claimed in claim 8, wherein, when judging the validity of the transition edge, the steps include: If Δt _m is greater than T, it is determined that the m+1th jump edge is valid, If Δt _m is less than or equal to T, and the mth jump edge is valid, then the m+1th jump edge is invalid, If Δt _m is less than or equal to T, and the mth jump edge is invalid, and the m-1th jump edge is valid, then the mth jump edge is valid, Wherein, Δt _m is the time interval between the occurrence moments of the mth transition edge and the (m+1)th transition edge of the OAM carrier signal. 10. A 5G fronthaul equipment management information monitoring device, characterized in that it comprises: A modulation module, which is used to modulate the OAM frame containing the management information of the optical module into an OAM carrier signal at the OAM physical layer sending end, and convert the OAM carrier signal into an optical signal after superimposing the service signal; A demodulation module, which is used to convert the received optical signal into an electrical signal at the OAM physical layer receiving end and divide it into a plurality of branch signals and demodulate each branch signal respectively to obtain OAM carrier signals of different carrier frequencies; The decoding module is configured to decode the OAM carrier signal to obtain management information of the corresponding branch signal.

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