CN116132245A - 5G forwarding device management information monitoring method and device - Google Patents
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- H04L27/00—Modulated-carrier systems
- H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
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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
Technical Field
The invention relates to the technical field of communication, in particular to a 5G forwarding device management information monitoring method and device.
Background
In a 5G network, the access network is reconfigured into the following 3 functional entities: CU (Centralized Unit), DU (distributed Unit), AAU (Active Antenna Unit ). In a 5G network, the AAU connection DU part is called 5G Fronthaul (Fronthaul), mid haul (Middlehaul) refers to the DU connection CU part, and Backhaul (Backhaul) is the communication bearer between the CU and the core network.
With the requirement of the 5G forwarding network on lightweight OAM and the realization of manageability and controllability in service, the optical modules on the AAU side and the DU side must be monitored in real time. The main scheme adopted in the related technology is that after local information is coded into binary, digital information 1 and 0 are represented by controlling the output current intensity of an electric chip in an optical module. This way of delivering module information by controlling the amplitude of the modulation current is called amplitude modulation mode. The amplitude modulation mode is relatively simple to realize, but the information of each module needs to be detected by a single PD (photo detector), so that the detection cost is high and the integration level is poor.
Disclosure of Invention
The embodiment of the invention provides a 5G forwarding device management information monitoring method and device, which are used for monitoring management information of different modules by a single PD (potential difference) through detecting and analyzing the management information in a frequency modulation mode.
In one aspect, an embodiment of the present invention provides a method for monitoring management information of a 5G forwarding device, which is characterized in that the method includes the steps of:
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.
In some embodiments, the modulating comprises the steps of:
converting the OAM frame into a binary bit stream and then performing Manchester encoding;
the coded data stream is subjected to serial-parallel conversion by taking every 2bit data as a code element to obtain two paths of output signals;
and modulating the two paths of output signals according to a preset modulation frequency to obtain an OAM carrier signal.
In some embodiments, the serial-parallel conversion obtains two paths of output signals based on a preset mapping relationship, where the preset mapping relationship is used to make the amplitude of the OAM carrier signal be 1.
In some embodiments, the preset mapping relationship includes:
s(t)＝Acos(wt+θ)，
where a is the amplitude of the output, θ=2pi×i/M (i=2, 3.. The M, M is 2n, n is the number of bits contained in one symbol).
In some embodiments, the modulating the two paths of output signals according to a preset modulation frequency to obtain an OAM carrier signal includes the steps of:
modulating according to a first formula, the first formula comprising:
s (t) =i sinwt-Q coswt, where s (t) is a modulated carrier signal, I is a first output signal, Q is a second output signal, and w is a preset modulation frequency.
In some embodiments, the demodulating comprises the steps of:
obtaining modulated carrier signals corresponding to the branch signals;
demodulating the modulated carrier signals corresponding to the branch signals according to the preset modulation frequencies corresponding to the branches to obtain two parallel signal strings;
and acquiring an OAM carrier signal based on the parallel signal string, wherein the OAM carrier signal is a serial binary code stream, and the OAM carrier signals corresponding to different tributary signals have different carrier frequencies.
In some embodiments, the demodulating according to the preset modulation frequency corresponding to the branch includes the steps of:
multiplying the modulated carrier signal s (t) by cos (n+1) ω 0 After t, the first parallel signal a is obtained through an integrating circuit n ；
Multiplying the modulated carrier signal s (t) by sin (n+1) ω 0 After t, obtaining a second parallel signal b through an integrating circuit n ；
(n+1)ω 0 For a preset modulation frequency, ω, of the nth branch 0 For the modulation frequency interval of adjacent wavelengths, the value range of n is 1 to the total branch number.
In some embodiments, the decoding the OAM carrier signal according to the encoding rule of the transmitting end to obtain the management information of the corresponding tributary signal includes the steps of:
sampling the OAM carrier signal and determining a jump edge of the OAM carrier signal;
and judging the effectiveness of the jump edge, and decoding the jump edge judged to be effective to obtain the management information of the corresponding branch signal.
In some embodiments, when determining the validity of the jump edge, the method includes the steps of:
if delta t m And is greater than T, the m+1st jump edge is judged to be valid,
if delta t m Less than or equal to T, and the mth transition edge is active, the m +1 th transition edge is inactive,
if delta t m Less than or equal to T, and the mth transition edge is invalid, the mth-1 transition edge is valid, the mth transition edge is valid,
wherein Δt is m Is the time interval between the occurrence time of the mth jump edge and the (m+1) th jump edge of the OAM carrier signal.
In a second aspect, an embodiment of the present invention further provides a 5G forwarding device management information monitoring apparatus, which is characterized in that the apparatus includes:
the modulation module is used for modulating an OAM frame containing management information of the optical module into an OAM carrier signal at an OAM physical layer transmitting end, and converting the OAM carrier signal and the service signal into optical signals for transmission after superposition;
the demodulation module is used for converting the received optical signals into electric signals at the OAM physical layer receiving end, dividing the electric signals into a plurality of branch signals and demodulating the branch signals respectively to obtain OAM carrier signals with different carrier frequencies;
and the decoding module is used for decoding the OAM carrier signal to obtain the management information of the corresponding tributary signal.
The embodiment of the invention provides a 5G forwarding device management information monitoring method and device, which adopt a frequency modulation mode to detect and analyze management information, and can detect the crest modulation information of different modules by a single photodiode PD through receiving crest modulation information of different carrier frequencies and a simplified decoding process, and can finish decoding by a simple mcu module. Therefore, more wavelength top modulation information expansion is easy to realize, and the integration level of the combining and dividing wave disc is higher and the cost is lower.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic flow chart of a method for monitoring management information of a 5G forwarding device according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a 5G forwarding device management information monitoring apparatus according to an embodiment of the present invention;
fig. 3 is a schematic diagram of an OAM physical layer sender according to an embodiment of the present invention;
FIG. 4 is a schematic diagram illustrating the mapping and adjustment of the MCU module according to the embodiment of the present invention;
fig. 5 is a schematic diagram of an application scenario for monitoring 5G forwarding device management information according to an embodiment of the present invention;
FIG. 6 is a schematic diagram illustrating the operation of a detection module according to an embodiment of the present invention;
fig. 7 is a schematic working diagram of a demodulation module according to an embodiment of the present invention;
fig. 8 is a schematic diagram of a 5G forwarding device management information monitoring apparatus according to an embodiment of the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As shown in fig. 1, an embodiment of the present invention provides a method for monitoring management information of a 5G forwarding device, including the steps of:
s100, 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 optical signals for transmission after superposition;
s200, converting a received optical signal into an electrical signal at an OAM physical layer receiving end, dividing the electrical signal into a plurality of branch signals, and demodulating each branch signal to obtain OAM carrier signals with different carrier frequencies;
and S300, decoding the OAM carrier signal to obtain management information of the corresponding tributary signal.
It will be appreciated that, as shown in fig. 2, the OAM function between the 5G forwarding device AAU and DU is mainly composed of an OAM application layer and an OAM physical layer. The OAM application layer realizes the functions of encapsulating and decapsulating OAM frames, and realizes the functions of optical module state monitoring, link fault positioning and the like. The OAM physical layer realizes physical layer processing of OAM data, namely modulation and demodulation of the physical layer.
Preferably, the modulating comprises the steps of:
s110, converting the OAM frame into a binary bit stream and then performing Manchester encoding;
s120, performing serial-parallel conversion on the coded data stream by taking every 2bit data as a code element to obtain two paths of output signals;
s130, modulating the two paths of output signals according to a preset modulation frequency to obtain an OAM carrier signal.
The manchester encoding method is to represent the numerical bits by changing the level, each bit has a transition in the middle, the transition from low to high represents '0', the transition from high to low represents '1', that is, the level "01" represents the data bit '0', and the level "10" represents the data bit '1'.
Further, in S120, two paths of output signals are obtained based on a preset mapping relationship during serial-parallel conversion, where the preset mapping relationship is used to make the amplitude of the OAM carrier signal be 1.
Preferably, the preset mapping relationship includes:
s(t)＝Acos(wt+θ)，
where a is the amplitude of the output, θ=2pi×i/M (i=2, 3.. The M, M is 2n, n is the number of bits contained in one symbol).
For example, when M is 4, n is 2, and a has a value of 1, so based on the preset mapping relationship, it is possible to obtain:
if the code element is 00, the first path of output signal is
The second output signal is->
If the code element is 01, the first path of output signal is
The second output signal is->
If the code element is 11, the first path of output signal is
The second output signal is->
If the code element is 10, the first path of output signal is
The second output signal is->
In some embodiments, S130 modulates according to a first formula, the first formula comprising:
s (t) =i sinwt-Q coswt, where s (t) is a modulated carrier signal, I is a first output signal, Q is a second output signal, and w is a preset modulation frequency.
Preferably, in order to prevent mutual interference, the preset modulation frequency w has a value between 10kHz and 1MHz, and the modulation frequencies of adjacent wavelengths are separated by 20kHz.
In some embodiments, the demodulating in S200 includes the steps of:
s210, obtaining modulated carrier signals corresponding to all branch signals;
s220, demodulating the modulated carrier signals corresponding to the branch signals according to the preset modulation frequencies corresponding to the branches to obtain two parallel signal strings;
s230, an OAM carrier signal is obtained 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 demodulating in S220 according to the preset modulation frequency corresponding to the branch includes the steps of:
s221 multiplying the modulated carrier signal S (t) by cos (n+1) ω 0 After t, the first parallel signal a is obtained through an integrating circuit n ；
S222, multiplying the modulated carrier signal S (t) by sin (n+1) ω 0 After t, obtaining a second parallel signal b through an integrating circuit n ；
Wherein (n+1) ω 0 For a preset modulation frequency, ω, of the nth branch 0 For the modulation frequency interval of adjacent wavelengths, the value range of n is 1 to the total branch number.
The carrier frequency here is (n+1) ω 0 Only the carrier signal of this frequency can be demodulated and the carrier signals of the other frequencies are integrated to obtain 0. Omega 0 The modulation frequencies for adjacent wavelengths are separated. I.e. the carrier frequency of the signal after demodulation corresponding to the 1 st branch is 2ω 0 The carrier frequency of the signal after the 2 nd branch corresponds to demodulation is 3 omega 0 And so on. If omega 0 And the value is 20kHz, the 1 st branch corresponds to the demodulated signal carrier frequency of 40kHz, the 2 nd branch corresponds to the demodulated signal carrier frequency of 60kHz, and the like.
In some embodiments, S300 comprises the steps of:
s310, sampling the OAM carrier signal and determining a jump edge of the OAM carrier signal;
s320, judging the effectiveness of the jump edge, and decoding the jump edge judged to be effective to obtain the management information of the corresponding branch signal.
It should be noted that, since the manchester encoding is adopted in the present embodiment, the encoding module cannot accurately identify the start and end points of each bit "0" or "1", so that multiple jump edges may be generated in the corresponding period. This coding characteristic results in a large number of invalid transition edges in the manchester encoded signal corresponding to the binary code stream of consecutive "0" s or "1" s. It is necessary to determine whether each transition edge is valid at decoding.
Further, when judging the effectiveness of the jump edge, according to the following judgment rule:
if delta t m Greater than T, the m +1 st transition edge is determined to be valid,
if delta t m Less than or equal to T, and the mth transition edge is active, the m +1 th transition edge is inactive,
if delta t m Less than or equal to T, and the mth transition edge is invalid, the mth-1 transition edge is valid, the mth transition edge is valid,
wherein Δt is m For the OAMThe time interval between the occurrence of the mth transition edge and the m+1th transition edge of the carrier signal.
It can be appreciated that in this embodiment, whether the transition edge is valid is determined based on a relationship between a time interval between two adjacent transition edges and a preset clock period threshold. The received OAM carrier signal is formed based on manchester encoding. The time interval between every two level jumps in the encoding is the clock period of Manchester encoding. The clock period may be obtained by calculating an average of the time intervals between a plurality of two transitions of the sampled data clock, or by a pre-configuration.Comparing the time interval between the two jump edges after sampling with the clock period threshold T to determine whether the jump edge is Effective and effective. The clock period threshold T may be determined by the clock period of manchester encoding, typically manchester encoding clock period x 0.6.
In this embodiment, by identifying the transition edge of the OAM carrier signal, the effective transition edge is screened out, which can effectively inhibit the occurrence of a large amount of invalid data caused by decoding due to error codes, signal burrs, and the like, so that the decoded data can be obtained more accurately. Therefore, the accuracy and the effectiveness of the decoding data can be improved, and the decoding process can be realized through a singlechip with lower cost due to the simplification of the decoding process, and a special chip or FPGA is not required, so that the hardware cost is reduced.
In some embodiments, when performing frame verification on the acquired corresponding tributary signal management information, the valid information part is verified, and the filling part does not count the verification;
the effective information comprises a module ID, a frame length and message content, wherein the message content comprises current, voltage, temperature, receiving and transmitting power, TEC temperature and alarm information of the module.
In some embodiments, before said demodulating, each branch signal is further processed by low frequency filtering and shaping amplifying to extract a millivolt carrier signal from the current signal, and using said millivolt carrier signal as an input for demodulation.
As shown in fig. 3, in a specific embodiment, the OAM physical layer transmitting end includes an MCU module and a driving module, where 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, where the management information includes DDM type information (including information of current, voltage, temperature, transmit-receive power, TEC temperature, alarm, etc. of the module), and then converts the OAM frame into a binary bit stream, performs manchester encoding, and inputs the binary bit stream to the mapping module. As shown in fig. 4, the mapping module forms one symbol from every 2bi t data (s 1, s 0), and after serial-parallel conversion, s1 is output to the I path, and s0 is output to the Q path. Wherein the mapping relation is shown in table 1, and the output amplitude can be ensured to be 1.
TABLE 1
Further, the modulation module modulates according to s (t) =i sinwt-Q coswt. Wherein ω represents modulation frequency, I and Q represent signals input by I and Q paths, respectively, s (t) is a modulated OAM carrier signal, and s (t) is input to the driving module. The driving module superimposes the modulated OAM carrier signal carrying the OAM information on the service signal, and then converts the OAM carrier signal into an optical signal to be transmitted to the multiplexing/demultiplexing module.
In a specific embodiment, the OAM physical layer receiving end may be connected to the PD module after splitting light by the optical splitter, convert the optical signal into a current signal according to the light intensity, and output the current signal to the detection module shown in fig. 5, so as to monitor the AAU side, the DU side optical module and the link state simultaneously. As shown in fig. 6, after receiving the current signal, the detection module extracts a millivolt-level low-frequency carrier signal from the current signal through low-frequency filtering and shaping amplification, and then outputs the signal to the demodulation module in parallel. The low-frequency carrier signal is formed by superposing multiple OAM carriers with different modulation frequencies, and can be expressed as: s' (t) =acos ω 0 t-bs inω 0 t+a 1 cos2ω 0 t-b 1 s in2ω 0 t+a 2 cos3ω 0 t-b 2 s in3ω 0 t+…+a n cos(n+1)ω 0 t-b n s in(n+1)ω 0 t, wherein a n cos(n+1)ω 0 t-b n sin(n+1)ω 0 t is the nth path OAM carrier signal, (n+1) omega 0 Representing the modulation frequency.
Further, as shown in fig. 7, the demodulation module multiplies the signal sS' (t) by the carrier cos (n+1) ω using the orthogonality of the carriers 0 t, then obtaining a signal a through an integrating circuit n . At the same time, the signal S' (t) is multiplied by the carrier sin (n+1) ω 0 t, then obtaining a signal b through an integrating circuit n . OAM carrier signals of other modulation frequencies in S' (t) are filtered out after passing through an integrating circuit to obtain 0, thereby obtaining two bit information a n ，b n . The symbol thus isochronously output is referred to as a symbol. Each demodulated symbol contains two bit information a output in parallel n ，b n . And then, obtaining a serial binary code stream through parallel-serial conversion and amplitude conversion (demapping), and sending the serial binary code stream to an MCU module for deframed.
In some embodiments, at the OAM application layer, the OAM frame format employs fixed length frame encapsulation. Each fixed-length frame is 64 bytes in length, and OAM information is stuffed into the fixed-length frames. The idle part of the fixed length frame is filled with a predefined filling code, not taking into account the information length. And when the OAM frame is checked, checking the effective information part, wherein the filling part does not count in the checking. The OAM frame format is shown in table 2.
TABLE 2
Wherein 0X7E7E7E represents a frame header flag, 0X7E represents a frame end flag, a module ID can be filled into DU side modules-0X 1 to 0xc and AAU side modules-0X 81 to 0X8c, a frame length can be filled with a message content length, and a frame check is used for checking 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 DDM type information of the optical module, including current, voltage, temperature, transmit-receive power, TEC temperature, alarm and other information of the module. Further padding is used to pad the free byte 0.
It is understood that the AAU side light module and the DU side light module may transmit 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 64 th byte are 0x7E, so as to determine whether the received data stream is an OAM frame. If not, discarding, if yes, receiving the OAM frame, and analyzing. After analyzing the module ID, if a certain line continues for 10 seconds and no OAM frame is received, judging that the line is broken, and reporting an alarm to the local side equipment. And analyzing the frame check code and the filling content, and if 3 continuous frames on a certain line have errors, judging that the line has errors, and reporting an alarm to local side equipment. And if the verification is free of problems, analyzing the message content, acquiring the state of the optical module, and reporting to a local side device network manager.
As shown in fig. 8, an embodiment of the present invention further provides a 5G forwarding device management information monitoring apparatus, which is characterized in that it includes:
the modulation module is used for modulating an OAM frame containing management information of the optical module into an OAM carrier signal at an OAM physical layer transmitting end, and converting the OAM carrier signal and the service signal into optical signals for transmission after superposition;
the demodulation module is used for converting the received optical signals into electric signals at the OAM physical layer receiving end, dividing the electric signals into a plurality of branch signals and demodulating the branch signals respectively to obtain OAM carrier signals with different carrier frequencies;
and the decoding module is used for decoding the OAM carrier signal to obtain the management information of the corresponding tributary signal.
In some embodiments, the modulation module is to:
converting the OAM frame into a binary bit stream and then performing Manchester encoding;
the coded data stream is subjected to serial-parallel conversion by taking every 2bi t data as a code element to obtain two paths of output signals;
and modulating the two paths of output signals according to a preset modulation frequency to obtain an OAM carrier signal.
The manchester encoding method is to represent the numerical bits by changing the level, each bit has a transition in the middle, the transition from low to high represents '0', the transition from high to low represents '1', that is, the level "01" represents the data bit '0', and the level "10" represents the data bit '1'.
Further, the modulation module obtains two paths of output signals based on a preset mapping relation during serial-parallel conversion, wherein the preset mapping relation is used for enabling the amplitude of the OAM carrier signal to be 1.
Preferably, the preset mapping relationship includes:
s(t)＝Acos(wt+θ)，
where a is the amplitude of the output, θ=2pi×i/M (i=2, 3.. The M, M is 2n, n is the bi number contained in one symbol).
In some embodiments, the modulation module modulates according to a first formula, the first formula comprising:
s (t) =i sinwt-Q coswt, where s (t) is a modulated carrier signal, I is a first output signal, Q is a second output signal, and w is a preset modulation frequency.
Preferably, in order to prevent mutual interference, the preset modulation frequency w has a value between 10kHz and 1MHz, and the modulation frequencies of adjacent wavelengths are separated by 20kHz.
In some embodiments, the demodulation module is configured to:
obtaining modulated carrier signals corresponding to the branch signals;
demodulating the modulated carrier signals corresponding to the branch signals according to the preset modulation frequencies corresponding to the branches to obtain two parallel signal strings;
and acquiring an OAM carrier signal based on the parallel signal string, wherein the OAM carrier signal is a serial binary code stream, and the OAM carrier signals corresponding to different tributary signals have different carrier frequencies.
Further, the demodulation module is further configured to demodulate according to a preset modulation frequency corresponding to the branch, where the specific packet is:
multiplying the modulated carrier signal s (t) by cos (n+1) ω 0 After t, the first parallel signal a is obtained through an integrating circuit n ；
Multiplying the modulated carrier signal s (t) by sin (n+1) ω 0 After t, obtaining a second through an integrating circuitParallel signal b n ；
Wherein (n+1) ω 0 For a preset modulation frequency, ω, of the nth branch 0 For the modulation frequency interval of adjacent wavelengths, the value range of n is 1 to the total branch number.
In some embodiments, the decoding module is to:
sampling the OAM carrier signal and determining a jump edge of the OAM carrier signal;
and judging the effectiveness of the jump edge, and decoding the jump edge judged to be effective to obtain the management information of the corresponding branch signal.
Further, when judging the effectiveness of the jump edge, according to the following judgment rule:
if delta t m Greater than T, the m +1 st transition edge is determined to be valid,
if delta t m Less than or equal to T, and the mth transition edge is active, the m +1 th transition edge is inactive,
if delta t m Less than or equal to T, and the mth transition edge is invalid, the mth-1 transition edge is valid, the mth transition edge is valid,
wherein Δt is m Is the time interval between the occurrence time of the mth jump edge and the (m+1) th jump edge of the OAM carrier signal.
Those of ordinary skill in the art will appreciate that all or some of the steps, systems, functional modules/units in the apparatus, and methods disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof. In a hardware implementation, the division between the 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 performed cooperatively by several physical components. 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, relational terms such as "first" and "second" and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The foregoing is only a specific embodiment of the invention to enable those skilled in the art to understand or practice the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The 5G forwarding device management information monitoring method is characterized by comprising 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.
2. The method for monitoring management information of 5G forwarding device according to claim 1, wherein the modulating comprises the steps of:
converting the OAM frame into a binary bit stream and then performing Manchester encoding;
the coded data stream is subjected to serial-parallel conversion by taking every 2bit data as a code element to obtain two paths of output signals;
and modulating the two paths of output signals according to a preset modulation frequency to obtain an OAM carrier signal.
3. The method for monitoring management information of 5G forwarding device according to claim 2, wherein two paths of output signals are obtained based on a preset mapping relationship during serial-parallel conversion, and the preset mapping relationship is used for enabling the amplitude of the OAM carrier signal to be 1.
4. The method for monitoring 5G forwarding device management information according to claim 3, wherein the preset mapping relationship includes:
s(t)＝Acos(wt+θ)，
where a is the amplitude of the output, θ=2pi×i/M (i=2, 3.. The M, M is 2n, n is the number of bits contained in one symbol).
5. The method for monitoring management information of 5G forwarding devices according to any one of claims 2 to 4, wherein the modulating the two output signals according to a preset modulation frequency to obtain an OAM carrier signal includes the steps of:
modulating according to a first formula, the first formula comprising:
s (t) =i sinwt-Q coswt, where s (t) is a modulated carrier signal, I is a first output signal, Q is a second output signal, and w is a preset modulation frequency.
6. The method for monitoring management information of 5G forwarding device according to claim 5, wherein the demodulating comprises the steps of:
obtaining modulated carrier signals corresponding to the branch signals;
demodulating the modulated carrier signals corresponding to the branch signals according to the preset modulation frequencies corresponding to the branches to obtain two parallel signal strings;
and acquiring an OAM carrier signal based on the parallel signal string, wherein the OAM carrier signal is a serial binary code stream, and the OAM carrier signals corresponding to different tributary signals have different carrier frequencies.
7. The method for monitoring management information of 5G forwarding devices according to claim 6, wherein the demodulating according to the preset modulation frequency corresponding to the branch comprises the steps of:
multiplying the modulated carrier signal s (t) by cos (n+1) ω 0 After t, the first parallel signal a is obtained through an integrating circuit n ；
Multiplying the modulated carrier signal s (t) by sin (n+1) ω 0 After t, obtaining a second parallel signal b through an integrating circuit n ；
(n+1)ω 0 For a preset modulation frequency, ω, of the nth branch 0 For the modulation frequency interval of adjacent wavelengths, the value range of n is 1 to the total branch number.
8. The method for monitoring management information of 5G forwarding device according to claim 1, wherein the decoding the OAM carrier signal according to the encoding rule of the transmitting end to obtain management information of the corresponding tributary signal includes the steps of:
sampling the OAM carrier signal and determining a jump edge of the OAM carrier signal;
and judging the effectiveness of the jump edge, and decoding the jump edge judged to be effective to obtain the management information of the corresponding branch signal.
9. The method for monitoring management information of 5G forwarding device according to claim 8, wherein when determining the validity of the jump edge, the method comprises the steps of:
if delta t m And is greater than T, the m+1st jump edge is judged to be valid,
if delta t m Less than or equal to T, and the mth transition edge is active, the m +1 th transition edge is inactive,
if delta t m Less than or equal to T, and the mth transition edge is invalid, the mth-1 transition edge is valid, the mth transition edge is valid,
wherein Δt is m Is the time interval between the occurrence time of the mth jump edge and the (m+1) th jump edge of the OAM carrier signal.
10. The utility model provides a 5G forward equipment management information monitoring devices which characterized in that, it includes:
the modulation module is used for modulating an OAM frame containing management information of the optical module into an OAM carrier signal at an OAM physical layer transmitting end, and converting the OAM carrier signal and the service signal into optical signals for transmission after superposition;
the demodulation module is used for converting the received optical signals into electric signals at the OAM physical layer receiving end, dividing the electric signals into a plurality of branch signals and demodulating the branch signals respectively to obtain OAM carrier signals with different carrier frequencies;
and the decoding module is used for decoding the OAM carrier signal to obtain the management information of the corresponding tributary signal.
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