Local communication unit testing device and method based on HPLC and HRF

Abstract

The invention provides a local communication unit testing device and testing method based on HPLC and HRF, and relates to the technical field of communication testing, the local communication unit testing device based on HPLC and HRF comprises an HPLC communication module, an HRF communication module, a signal processing module, a control module, an environmental interference simulation module and an output module, according to the invention, the test efficiency and the communication reliability are significantly improved through dynamic spectrum allocation, dual-mode collaborative test and high-precision analysis technologies, a data-driven decision basis is provided for equipment optimization, an FPGA + DSP collaborative architecture is adopted, time-frequency joint demodulation of HPLC and HRF signals is realized, and the performance of the system is improved. And performing dynamic classification comprehensive evaluation on the communication quality in combination with a machine learning algorithm.

Description

Technical Field

[0001] The present invention relates to the technical field of communication testing, and particularly to a local communication unit testing device and testing method based on HPLC and HRF. Background Art

[0002] With the deep integration of smart grid and Internet of Things technologies, local communication units (such as smart meters, data concentrators, Internet of Things gateways) need to support both high-speed power line carrier communication (HPLC) and high-speed radio frequency communication (HRF) simultaneously to achieve complementary coverage of power lines and wireless channels. The HPLC technology uses power lines as the transmission medium, which has the advantages of no need for additional wiring and wide coverage, but its signal is vulnerable to power line noise and impedance changes; the HRF technology transmits data through wireless frequency bands and has the ability to form flexible networks, but faces challenges such as multipath fading and coexistence of interference.

[0003] To overcome the defects of a single communication mode, the HPLC+HRF dual-mode communication technology is proposed. By the collaborative work of power lines and wireless channels, complementary advantages are achieved. For example, the existing publication number CN118869457B discloses an online monitoring method based on HPLC and HRF dual-mode communication. The method of the present invention includes obtaining the node information of the target node electric energy meter, where the node information includes the node number and signal timing information of the target node electric energy meter; obtaining the communication quality monitoring signal between the target node electric energy meter and the previous adjacent node according to the signal timing information of the target node; monitoring the HPLC digital signal between the previous adjacent node and the target node according to the communication quality monitoring signal and obtaining the preliminary judgment result of the abnormal signal; obtaining the reverse test result of the previous adjacent node; and confirming whether to switch the HPLC communication mode of the previous adjacent node to the HRF communication mode according to the reverse test result. This solution realizes real-time monitoring and real-time feedback based on each node and solves communication faults online through HRF, ensuring the rapid discovery, rapid response, and preliminary solution of faults in the operation of the power network.

[0004] However, the existing testing device only supports single-mode switching testing of HPLC and HRF, independently analyzes HPLC and HRF signals, lacks the ability of joint time-frequency domain decoding, and cannot comprehensively evaluate the communication quality.

[0005] Therefore, it is necessary to provide a new local communication unit testing device and testing method based on HPLC and HRF to solve the above technical problems. Summary of the Invention

[0006] To solve the above technical problems, the present invention provides a local communication unit testing device and testing method based on HPLC and HRF.

[0007] The local communication unit test device based on HPLC and HRF provided by the present invention on the one hand includes:

[0008] An HPLC communication module, which is used to simulate or receive high-speed power line carrier communication signals and dock with the power line interface of the unit under test;

[0009] An HRF communication module, which is used to simulate or receive high-speed radio frequency communication signals and dock with the wireless interface of the unit under test;

[0010] A signal processing module, which is connected to the HPLC communication module and the HRF communication module, and is used to perform joint time-domain and frequency-domain analysis on the received bidirectional communication signals, and extract key performance indicators such as bit error rate, signal-to-noise ratio, and transmission delay;

[0011] A control module, which is used for synchronous triggering, parameter configuration and test result fusion analysis of HPLC and HRF signals;

[0012] An environmental interference simulation module, which is used to generate power line noise, multipath interference or wireless channel fading models to verify the anti-interference ability of the unit under test in a complex environment;

[0013] An output module, which is used to output a test report.

[0014] Furthermore, the HPLC communication module includes a tunable impedance matching network, adapts to switch between CENELEC frequency bands and FCC frequency bands, and has a built-in power line coupling circuit to simulate the characteristics of the actual power grid.

[0015] Furthermore, the signal processing module adopts an FPGA+DSP cooperative architecture, which is used for time-frequency joint demodulation of HPLC and HRF signals, and dynamically evaluates the communication quality through machine learning algorithms.

[0016] Furthermore, the environmental interference simulation module includes a power line impulse generator and a wireless channel fading simulator.

[0017] Furthermore, the HRF communication module includes a defined radio architecture and integrates a MIMO antenna array to simulate a spatial diversity scenario.

[0018] On the other hand, the present invention provides a method for testing a local communication unit based on HPLC and HRF. The method includes the following steps:

[0019] Step 1: Configure the test parameters of the HPLC communication module and the HRF communication module through the control module, including modulation mode, coding rate and interference model;

[0020] Step 2: Synchronously trigger the HPLC communication module to send a carrier signal and the HRF communication module to send a radio frequency signal, and record the bidirectional response data of the unit under test;

[0021] Step 3: The signal processing module performs joint decoding on the received signal, calculates the phase noise of the HPLC channel and the bit error rate of the HRF channel;

[0022] Step 4: Combine the real-time data of the environmental interference simulation module to generate a test report containing communication robustness indicators;

[0023] Step 5: Output the test results and conduct a comparative analysis of historical test data.

[0024] A further method is that in Step 3, a cross-validation mechanism is adopted to align the time sequences of the HPLC and HRF signals to ensure the spatio-temporal consistency of the test data of the power line and wireless channels.

[0025] A further method is that the test report includes the following extended content: an HPLC channel quality map based on the power spectral density of OFDM subcarriers, a statistical distribution of the multipath delay spread of the HRF signal, the success rate of communication link switching, and an evaluation of service continuity.

[0026] A further method is that in Step 1, the test frequency band combination of the HPLC communication module and the HRF communication module is optimized through a dynamic spectrum allocation algorithm.

[0027] Compared with the related technologies, the local communication unit test device and test method based on HPLC and HRF provided by the present invention have the following beneficial effects:

[0028] 1. The present invention significantly improves the test efficiency and communication reliability through dynamic spectrum allocation, dual-mode collaborative testing, and high-precision analysis technologies. At the same time, it provides a data-driven decision-making basis for equipment optimization. It adopts an FPGA+DSP collaborative architecture to realize the time-frequency joint demodulation of HPLC and HRF signals, and comprehensively evaluates the communication quality by dynamically classifying it with machine learning algorithms.

[0029] 2. The test device of the present invention covers key indicators such as signal quality, bit error rate, EVM, spectral efficiency, and power consumption, and is applicable to scenarios such as smart grids and industrial Internet of Things. Through dynamic channel allocation and conflict warning technologies, the test efficiency and communication reliability are significantly improved.

[0030] 3. The present invention dynamically assigns the priority of test data packets according to the HPLC and HRF channel qualities, reduces manual intervention, improves the detection efficiency. Through time-frequency domain joint decoding, the test accuracy of the bit error rate is improved, and the error of the signal-to-noise ratio evaluation is reduced. Description of the Drawings

[0031] Figure 1 It is a structural block diagram of the local communication unit test device based on HPLC and HRF provided by the present invention;

[0032] Figure 2 The structural block diagram of the joint decoding provided by the present invention;

[0033] Figure 3 The flow block diagram of the local communication unit test method based on HPLC and HRF provided by the present invention. Specific embodiments

[0034] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0035] Please refer to Figure 1 , Figure 2 and Figure 3 , wherein, Figure 1 The structural block diagram of the local communication unit test device based on HPLC and HRF provided by the present invention; Figure 2 The structural block diagram of the joint decoding provided by the present invention; Figure 3 The flow block diagram of the local communication unit test method based on HPLC and HRF provided by the present invention.

[0036] Embodiment 1

[0037] In the specific implementation process, as Figure 1 shown, the local communication unit test device based on HPLC and HRF includes an HPLC communication module, an HRF communication module, a signal processing module, a control module, an environmental interference simulation module, and an output module;

[0038] The HPLC communication module is used to simulate or receive high-speed power line carrier communication signals and dock with the power line interface of the unit under test. The HPLC communication module includes a tunable impedance matching network, adaptive switching between CENELEC frequency bands and FCC frequency bands, and a built-in power line coupling circuit to simulate the characteristics of the actual power grid;

[0039] It should be noted that the function of the HPLC communication module is realized as follows:

[0040] Signal simulation and reception: The transmission and reception of power line carrier signals are realized through the tunable impedance matching network;

[0041] Power line coupling circuit: Integrating a capacitive coupler and a common mode choke to simulate the characteristics of the actual power grid;

[0042] Frequency band adaptive switching: Switching between CENELEC and FCC frequency bands through software control.

[0043] The HRF communication module is used to simulate or receive high-speed radio frequency communication signals and dock with the wireless interface of the unit under test. The HRF communication module adopts a software-defined radio architecture and integrates a MIMO antenna array to simulate a spatial diversity scenario;

[0044] It should be noted that the function of the HPLC communication module is realized as follows:

[0045] Software-defined radio architecture: The modulation methods include QPSK, 16-QAM, and OFDM.

[0046] MIMO antenna array: Integrate a 4×4 MIMO antenna to simulate a multipath environment through spatial diversity.

[0047] Dynamic spectrum planning: Based on machine learning algorithms, optimize channel selection in real time to avoid interference bands.

[0048] The signal processing module is connected to the HPLC communication module and the HRF communication module, and is used for joint time-domain and frequency-domain analysis of the received two-way communication signals to extract key performance indicators such as bit error rate, signal-to-noise ratio, and transmission delay;

[0049] It should be noted that the signal processing module adopts an FPGA+DSP collaborative architecture for time-frequency joint demodulation of HPLC and HRF signals, and dynamically evaluates the communication quality through machine learning algorithms.

[0050] The control module is used for synchronous triggering, parameter configuration, and fusion analysis of test results of HPLC and HRF signals;

[0051] It should be noted that the control module uses GPSDO to achieve phase synchronization of HPLC and HRF signals, and sets the HPLC modulation method (OFDM-1024), coding rate (3 / 4), forward error correction (RS(255,239)); HRF frequency band (2.4GHz), modulation method (OFDM-20MHz), transmit power (20dBm) through the Web interface.

[0052] The environmental interference simulation module is used to generate power line noise, multipath interference, or wireless channel fading models to verify the anti-interference ability of the unit under test in a complex environment;

[0053] It should be noted that the environmental interference simulation module includes a power line impulse generator and a wireless channel fading simulator. The power line noise simulation of the environmental interference simulation module injects periodic noise through the impulse generator, and the wireless channel fading simulation uses the USRPN320 platform to generate multipath fading signals, and loads the power line impulse group model (pulse width 50μs, repetition frequency 100Hz) and the wireless multipath fading model (Rayleigh fading, delay spread 3μs).

[0054] The output module is used to output test reports.

[0055] It should be noted that the physical connections of the test device are as follows:

[0056] The HPLC port connection connects the HPLC port of the unit under test to the signal generator and spectrum analyzer of the tester through a shielded network cable (RJ45 interface);

[0057] The HRF antenna connection connects the HRF antenna to the vector network analyzer and oscilloscope through an SMA adapter cable;

[0058] Power control uses a DC power supply module (output voltage 5V / 12V, current accuracy ±1%) to supply power to the unit under test and records the startup time (accuracy ±0.1 second).

[0059] Example Two

[0060] In the specific implementation process, refer to Figure 3 As shown, a local communication unit test method based on HPLC and HRF, the method includes the following steps:

[0061] Step 1: Configure the test parameters of the HPLC communication module and the HRF communication module through the control module, including modulation mode, coding rate, and interference model, and optimize the test frequency band combination of the HPLC and HRF modules through the dynamic spectrum allocation algorithm;

[0062] Step 2: Synchronously trigger the HPLC communication module to send a carrier signal and the HRF communication module to send a radio frequency signal, and record the two-way response data of the unit under test;

[0063] Among them, the HPLC signal: transmits an OFDM-1024 frame, including a preamble (length 128 symbols), a frame control field (8 bytes), and payload data (1024 bytes), and the data rate is 10 Mbps.

[0064] The HRF signal: transmits an OFDM-20 MHz frame, including a short training sequence (STS), a long training sequence (LTS), and a data field, and the data rate is 54 Mbps;

[0065] Step 3: The signal processing module performs joint decoding on the received signal and calculates the phase noise of the HPLC channel and the bit error rate of the HRF channel;

[0066] Among them, HPLC reception: captures the reflected signal through AD73322, the sampling rate is 2 MSPS, and the resolution is 12 bit;

[0067] HRF reception: captures the wireless signal through USRP N320, the bandwidth is 20 MHz, and the sampling rate is 25 MSPS;

[0068] Step 4: Combine the real-time data of the environmental interference simulation module to generate a test report including communication robustness indicators;

[0069] Step 5: Output the test results and conduct a comparative analysis of the historical test data.

[0070] It should be noted that when connecting the unit under test, connect the HPLC port of the unit under test to the RJ45 interface of the tester through a shielded network cable, connect the HRF antenna to the spectrum analyzer through an SMA adapter cable, connect to the DC power supply, and record the startup time.

[0071] It should be noted that with reference to Figure 2 as shown, the joint analysis of the signals in Step 3 includes:

[0072] 1. Time-domain analysis

[0073] HPLC signal: Calculate the eye diagram opening (eye height / eye width), and the qualified threshold ≥ 80%;

[0074] HRF signal: Generate the power delay profile (PDP), measure the multipath delay spread (Δτ), and the qualified threshold ≤ 5 μs.

[0075] 2. Frequency-domain analysis

[0076] HPLC channel: Generate the power spectral density (PSD) map with a resolution of 1 Hz, and measure the signal-to-noise ratio (SNR) ≥ 30 dB;

[0077] HRF channel: Generate the channel state information (CSI), and measure the received signal strength indication (RSSI) ≥ -85 dBm.

[0078] 3. Joint decoding

[0079] Timing alignment: Align the timing tags of the HPLC and HRF signals through a cross-validation mechanism to ensure the spatio-temporal consistency of the dual-channel test data (time synchronization error ≤ 10 ns);

[0080] Dynamic evaluation: Run the SVM algorithm, with the input features including SNR, BER, and phase noise, and output the communication quality level.

[0081] Optionally, after combining the real-time data of the environmental interference simulation module in Step 4, an error vector magnitude test is also required. Send a 16-QAM signal, use an oscilloscope to collect I / Q data, and calculate the error vector magnitude EVM;

[0082]

[0083] Among them, I k and Q k are the actual sampling points, and are the ideal reference points, and are the reference signal amplitudes;

[0084] Example: The number of sampling points N = 1024, the root mean square error value is 0.12, and the reference signal RMS is 1.0, then

[0085] Optionally, for the bit error rate test calculation, send 1 million bits of pseudo-random sequence, and compare the original data after forwarding through the unit under test;

[0086] Calculation of the bit error probability:

[0087] Example: 15 error bits are detected, and a total of 1,048,576 bits are transmitted

[0088] Optionally, the dynamic spectrum allocation algorithm allocates the priority of test data packets according to the HPLC and HRF channel qualities;

[0089] Weight calculation:

[0090] Among them, C i is the capacity of channel i, and B is the bandwidth;

[0091] Example:

[0092] The HPLC channel capacity C1 = 20 Mbps, and the HRF channel capacity C2 = 15 Mbps

[0093] Calculate the weight

[0094] It should be noted that in step three, a cross-validation mechanism is used to perform timing alignment on the HPLC and HRF signals to ensure the spatio-temporal consistency of the test data of the power line and wireless channels.

[0095] It should be noted that the test report includes the following extended content: the HPLC channel quality map based on the power spectral density of OFDM subcarriers, the statistical distribution of the multipath delay spread of the HRF signal, the communication link handover success rate, and the service continuity evaluation.

[0096] With the acceleration of the construction of the smart grid and the explosive growth of Internet of Things devices, the market demand for the dual-mode communication unit test device is becoming increasingly urgent.

[0097] The present invention can also be widely applied to:

[0098] Smart meter detection: Verify the communication reliability of the meter in an environment where power line noise and wireless interference coexist;

[0099] Internet of Things gateway test: Evaluate the service continuity of the gateway during the HPLC and HRF link handover.

[0100] Research and Development of Communication Module: Provide a standardized test platform for HPLC / HRF chips and modules to accelerate product iteration.

[0101] The readable storage medium of the above data can be a transient computer-readable storage medium or a non-transient computer-readable storage medium.

[0102] The technical solution of the embodiments of the present disclosure can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes one or more instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in the embodiments of the present disclosure. The foregoing storage medium may be a non-transient storage medium, including: various media such as USB flash drives, mobile hard disks, read-only memories (ROMs), random access memories (RAMs), magnetic disks, or optical discs that can store program codes, or may also be a transient storage medium.

[0103] The above description and the drawings fully illustrate the embodiments of the present disclosure so that those skilled in the art can practice them. Other embodiments may include structural, logical, electrical, process, and other changes. Embodiments only represent possible variations. Unless explicitly required, individual components and functions are optional, and the order of operations may vary. Parts and features of some embodiments may be included in or substituted for parts and features of other embodiments. Moreover, the terms used in this application are only for describing embodiments and are not used to limit the claims. As used in the description of the embodiments and the claims, unless the context clearly indicates otherwise, the singular forms "a", "an", and "the" are intended to also include the plural forms. Similarly, as used in this application, the term "and / or" refers to any and all possible combinations including one or more of the associated listed items. Additionally, when used in this application, the term "comprise" and its variants "comprises" and / or "comprising" etc. mean the presence of the stated features, wholes, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components, and / or groupings of these. Without further limitation, an element defined by the statement "comprising one..." does not exclude the presence of additional identical elements in the process, method, or device including the element. In this article, each embodiment may focus on the differences from other embodiments, and the same or similar parts between the embodiments may be referred to each other. For the methods, products, etc. disclosed in the embodiments, if they correspond to the method part disclosed in the embodiments, the relevant parts may refer to the description of the method part.

[0104] Those skilled in the art can realize that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are executed in a hardware or software manner can depend on the specific application and design constraints of the technical solution. The technician can use different methods for each specific application to implement the described functions, but such implementation should not be considered to exceed the scope of the embodiments of the present disclosure. Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working processes of the systems, devices, and units described above can refer to the corresponding processes in the foregoing method embodiments and will not be elaborated herein.

[0105] In the embodiments disclosed herein, the disclosed methods, products (including but not limited to devices, equipment, etc.) can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the units can be merely a logical function division, and there can be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Additionally, the couplings, direct couplings, or communication connections shown or discussed among each other can be through some interfaces. The indirect couplings or communication connections of the devices or units can be in electrical, mechanical, or other forms. The units described as separate components can be physically separated or not. The components shown as units can be physical units or not, that is, they can be located in one place or distributed to multiple network units. Some or all of the units can be selected according to actual needs to implement this embodiment. Additionally, in the embodiments of the present disclosure, the functional units can be integrated in one processing unit, or each unit can exist physically alone, or two or more units can be integrated in one unit.

[0106] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to embodiments of the present disclosure. In this regard, each block in the flowchart or block diagram may represent a module, a segment of code, or a portion thereof that contains one or more executable instructions for implementing the specified logical function. In some alternative implementations, the functions noted in the blocks may occur in a different order than noted in the accompanying drawings. For example, two consecutive blocks may in fact be executed substantially in parallel, or they may sometimes be executed in the reverse order, depending on the functionality involved. In the description corresponding to the flowcharts and block diagrams in the accompanying drawings, the operations or steps corresponding to different blocks may also occur in a different order than disclosed in the description, and sometimes there is no specific order between different operations or steps. For example, two consecutive operations or steps may in fact be executed substantially in parallel, or they may sometimes be executed in the reverse order, depending on the functionality involved. Each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, can be implemented by a dedicated hardware-based system that performs the specified functions or actions, or can be implemented by a combination of dedicated hardware and computer instructions.

Claims

1. A local communication unit test device based on HPLC and HRF, characterized in that, Including: An HPLC communication module, which is used to simulate or receive high-speed power line carrier communication signals and dock with the power line interface of the unit under test; An HRF communication module, which is used to simulate or receive high-speed radio frequency communication signals and dock with the wireless interface of the unit under test; A signal processing module, connected to the HPLC communication module and the HRF communication module, which is used to perform joint time-domain and frequency-domain analysis on the received two-way communication signals, and extract key performance indicators such as bit error rate, signal-to-noise ratio, and transmission delay; A control module, which is used for synchronous triggering, parameter configuration, and fusion analysis of test results of HPLC and HRF signals; An environmental interference simulation module, which is used to generate power line noise, multipath interference, or wireless channel fading models to verify the anti-interference ability of the unit under test in a complex environment; An output module, which is used to output test reports.

2. The local communication unit test device based on HPLC and HRF according to claim 1, characterized in that, The HPLC communication module includes a tunable impedance matching network, adaptively switches between the CENELEC frequency band and the FCC frequency band, and has a built-in power line coupling circuit to simulate the characteristics of the actual power grid.

3. The local communication unit test device based on HPLC and HRF according to claim 1, characterized in that, The signal processing module adopts an FPGA+DSP collaborative architecture, which is used for time-frequency joint demodulation of HPLC and HRF signals, and dynamically evaluates the communication quality through machine learning algorithms.

4. The local communication unit test device based on HPLC and HRF according to claim 1, wherein The environmental interference simulation module includes a power line impulse generator and a wireless channel fading simulator.

5. The local communication unit test device based on HPLC and HRF according to claim 1, characterized in that, The HRF communication module includes a defined radio architecture and integrates a MIMO antenna array to simulate a space diversity scenario.

6. A local communication unit testing method based on HPLC and HRF, applicable to the local communication unit testing device based on HPLC and HRF according to any one of claims 1-5, characterized in that, The method includes the following steps: Step 1: Configure the test parameters of the HPLC communication module and the HRF communication module through the control module, including modulation mode, coding rate, and interference model; Step 2: Synchronously trigger the HPLC communication module to send a carrier signal and the HRF communication module to send a radio frequency signal, and record the two-way response data of the unit under test; Step 3: The signal processing module performs joint decoding on the received signal, and calculates the phase noise of the HPLC channel and the bit error rate of the HRF channel; Step 4: Combine the real-time data of the environmental interference simulation module to generate a test report including communication robustness indicators; Step 5: Output the test results and perform comparative analysis on historical test data.

7. The local communication unit testing device and testing method based on HPLC and HRF according to claim 6, characterized in that, In Step 3, a cross-validation mechanism is adopted to align the time sequences of HPLC and HRF signals to ensure the spatio-temporal consistency of the test data of the power line and the wireless channel.

8. The local communication unit testing device and testing method based on HPLC and HRF according to claim 7, characterized in that The test report includes the following extended content: an HPLC channel quality map based on the power spectral density of OFDM subcarriers, a statistical distribution of the multipath delay spread of HRF signals, the success rate of communication link switching, and the evaluation of service continuity.

9. The local communication unit testing device and testing method based on HPLC and HRF according to claim 8, characterized in that, In Step 1, the test frequency band combination of the HPLC communication module and the HRF communication module is optimized through a dynamic spectrum allocation algorithm.

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