Cross-mode remote communication integrated networking adaptive method and related device

Abstract

The invention belongs to the technical field of electric power information communication, and discloses a cross-mode remote communication integrated networking adaptive method and a related device. The cross-mode remote communication integrated networking adaptive method comprises the following steps: dividing a channel access mode of an electric power professional data transmission terminal into a control channel access mode and a service channel access mode; a control channel fixedly uses a GMSK modulation and demodulation mode; and the service channel is dynamically switched into one of three modulation and demodulation modes of GMSK, 8PSK and 16QAM according to the indication condition of a keyword in the downlink control signaling of the control channel, and the three modulation and demodulation modes correspond to 25K, 50K and 100K data bandwidths in sequence respectively. According to the technical scheme of the invention, a mode of automatically switching the data bandwidth is provided by considering the difference between the data volume of the control channel and the data volume of the service channel, so that the transmission requirements of larger data services can be met, the utilization efficiency of the 230M frequency band bandwidth can be greatly improved, and the waste of frequency resources is reduced.

Description

Technical Field

[0001] The present invention belongs to the field of electric power information communication technology, and in particular relates to a cross-mode remote communication integrated networking adaptive method and related devices. Background Art

[0002] The smart grid is the future direction of power grid development. It integrates the latest information technology, communications, and computer control technologies with existing transmission and distribution infrastructure to form a new type of power grid, realizing the intelligentization of the power system. The smart grid plays a key role in improving energy efficiency, reducing environmental impact, enhancing the safety and reliability of power supply, and reducing power loss in the transmission network.

[0003] The power wireless communication system is the basic support platform for the construction of smart grids. It is a transmission platform for real-time two-way interaction of various management and control information of smart grids. It can widely cover users in various power grid areas and quickly and securely push services directly to the end of the power grid, playing an important role in the power communication system.

[0004] The 230MHz electric power wireless communication system (EPDT system), based on mature PDT (Public Digital Trunking) technology, is targeted at smart grid communication network applications and primarily meets the following service requirements: power consumption information collection on the distribution and utilization side, distribution network automation and load management, smart power consumption services, and other services within the power Internet of Things. Specifically, the EPDT communication module connects to the power service terminal via a USB serial port, accesses the EPDT base station via the EPDT air interface protocol, and establishes a power service data transmission channel to the EPDT base station. However, due to the PDT system's limited bandwidth of 12.5K, data transmission throughput is currently insufficient to meet the data transmission needs of the electric power wireless communication system, necessitating the development of data transmission methods with higher data bandwidths. Summary of the Invention

[0005] The present invention aims to provide a method and related apparatus for cross-mode telecommunication integrated networking adaptation to address one or more of the aforementioned technical problems. The disclosed technical solution, taking into account the data volume differences between control and traffic channels, provides a method for automatically switching data bandwidth, thereby meeting the transmission needs of larger data services, significantly improving the utilization efficiency of the 230 MHz frequency band, and reducing the waste of frequency resources.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: In a first aspect, the present invention provides a cross-mode telecommunication integrated networking adaptive method, comprising the following steps: Determine the channel access mode of the power professional data transmission terminal; the channel access mode is control channel access or service channel access; Based on the channel access method, the modulation and demodulation method is determined according to preset rules; wherein, when the channel access method is control channel access, the control channel uses Gaussian minimum shift keying GMSK modulation and demodulation method; when the channel access method is service channel access, the service channel dynamically switches to one of the three modulation and demodulation methods of Gaussian minimum shift keying GMSK, 8-phase shift keying 8PSK, and 16-quadrature amplitude modulation 16QAM according to the indication of the keyword in the downlink control signaling of the control channel; the three modulation and demodulation methods of GMSK, 8PSK, and 16QAM correspond to 25K, 50K, and 100K data bandwidths, respectively.

[0007] A further improvement of the technical solution of the present invention lies in that, in the step in which the service channel dynamically switches to one of the three modulation and demodulation modes of Gaussian minimum shift keying GMSK, 8-phase shift keying 8PSK, and 16-quadrature amplitude modulation 16QAM according to the indication of the keyword in the control channel downlink control signaling, the keyword is the BIT[26:27] bit of the control channel downlink signaling PD_GRANG signaling and TD_GRANG signaling; wherein the keyword is defined as: 00 indicates that the service channel uses a 25khz channel bandwidth and a GMSK modulation and demodulation mode, 01 indicates that the service channel uses a 50khz channel bandwidth and a 8PSK modulation and demodulation mode, and 10 indicates that the service channel uses a 100khz channel bandwidth and a 16QAM modulation and demodulation mode.

[0008] A further improvement of the technical solution of the present invention is that the three modulation and demodulation modes of GMSK, 8PSK and 16QAM are divided into two parts, modulation and demodulation, which correspond to the transmitting part and the receiving part of the power professional data transmission equipment respectively; wherein, The transmission part executes the following steps: the protocol layer prepares the transmission data, performs channel coding on the transmission data, determines the value of the keyword, enters the modulation algorithm of GMSK, 8PSK or 16QAM modulation and demodulation mode based on the determination result, and sends the modulated data to the RF circuit through the transmission filter; The execution steps of the receiving part are as follows: the signal is sent to the demodulation function entrance through the RF circuit, the value of the keyword is judged, and the demodulation algorithm of GMSK, 8PSK or 16QAM modulation and demodulation mode is entered according to the judgment result. The demodulated data is decoded by the channel, and the decoded bit data is sent to the protocol layer.

[0009] A further improvement of the technical solution of the present invention is that: The modulation algorithm of the GMSK modulation and demodulation method includes the following steps: the original data after keyword judgment is input into the GMSK modulation function, and the synchronization word is inserted according to the GMSK frame format to obtain GMSK transmission data; the obtained GMSK transmission data is differentially polarized to obtain output data; the output data is passed through a Gaussian filter to obtain filtered data, and the filtered data is phase modulated to obtain modulated output data; The demodulation algorithm of the GMSK modulation and demodulation method includes the following steps: matched filtering is performed on the received GMSK signal; coarse synchronization is performed on the matched filtered data to find the signal frame header; the output data after coarse synchronization is sent to the derotation function for derotation processing and frequency offset estimation, and then fine synchronization is performed to determine the exact position of the synchronization word; the output data after fine synchronization is first subjected to signal distortion correlation compensation and then decision demodulation to obtain the original data.

[0010] A further improvement of the technical solution of the present invention is that: 8PSK and 16QAM modulation and demodulation share the same modulation algorithm. The process includes: The original data, after keyword determination, is fed into the 8PSK or 16QAM modulation function. The synchronization word is inserted according to the 8PSK or 16QAM frame structure to generate the transmitted data. The transmitted data undergoes 8PSK or 16QAM-specific symbol mapping and symbol rotation to generate the modulated output data. The demodulation algorithms for 8PSK and 16QAM modulation and demodulation are the same. The process includes: performing matched filtering on the 8PSK or 16QAM signal inputted by the receiving RF front end through the hardware, using the output after matched filtering as the receiving function data of 8PSK or 16QAM, performing coarse frequency offset estimation based on the receiving function data to obtain a preliminary frequency offset result, and then performing coarse frequency offset compensation on the input signal to obtain the output data after coarse frequency offset compensation; performing coarse synchronization on the output data after coarse frequency offset compensation to roughly locate the synchronization head position of the signal frame, calculating the phase rotation result based on the synchronization head position data, and using the phase The rotation result is used to derotate the input data of the coarse synchronization processing to obtain the derotated data; the derotated data is subjected to precise frequency offset estimation, and the precise frequency offset result is calculated and compensated to obtain the precise frequency offset compensated data; the precise frequency offset compensated data is subjected to precise synchronization to accurately locate the optimal starting position of the synchronization word; according to the frame structure of 8PSK or 16QAM, downsampling is performed at the oversampling rate OSR, and a symbol sequence of the corresponding length of 8PSK or 16QAM is extracted. The sequence is subjected to phase offset compensation to obtain the precise symbol sequence, and finally, the demodulated output data is obtained through decision demodulation.

[0011] A second aspect of the present invention provides a cross-mode remote communication integrated networking adaptive system, comprising: The channel access mode acquisition module is used to determine the channel access mode of the power professional data transmission terminal; wherein the channel access mode is control channel access or service channel access; A modulation and demodulation mode determination module is used to determine the modulation and demodulation mode according to preset rules based on the channel access mode; wherein, when the channel access mode is control channel access, the control channel uses Gaussian minimum shift keying GMSK modulation and demodulation mode; when the channel access mode is service channel access, the service channel dynamically switches to one of the three modulation and demodulation modes of Gaussian minimum shift keying GMSK, 8-phase shift keying 8PSK, and 16-quadrature amplitude modulation 16QAM according to the indication of the keyword in the control channel downlink control signaling; the three modulation and demodulation modes of GMSK, 8PSK, and 16QAM correspond to 25K, 50K, and 100K data bandwidths, respectively.

[0012] A further improvement of the technical solution of the present invention lies in that, in the step in which the service channel dynamically switches to one of the three modulation and demodulation modes of Gaussian minimum shift keying GMSK, 8-phase shift keying 8PSK, and 16-quadrature amplitude modulation 16QAM according to the indication of the keyword in the control channel downlink control signaling, the keyword is the BIT[26:27] bit of the control channel downlink signaling PD_GRANG signaling and TD_GRANG signaling; wherein the keyword is defined as: 00 indicates that the service channel uses a 25khz channel bandwidth and a GMSK modulation and demodulation mode, 01 indicates that the service channel uses a 50khz channel bandwidth and a 8PSK modulation and demodulation mode, and 10 indicates that the service channel uses a 100khz channel bandwidth and a 16QAM modulation and demodulation mode.

[0013] A further improvement of the technical solution of the present invention is that the three modulation and demodulation modes of GMSK, 8PSK and 16QAM are divided into two parts, modulation and demodulation, which correspond to the transmitting part and the receiving part of the power professional data transmission equipment respectively; wherein, The transmission part executes the following steps: the protocol layer prepares the transmission data, performs channel coding on the transmission data, determines the value of the keyword, enters the modulation algorithm of GMSK, 8PSK or 16QAM modulation and demodulation mode based on the determination result, and sends the modulated data to the RF circuit through the transmission filter; The execution steps of the receiving part are as follows: the signal is sent to the demodulation function entrance through the RF circuit, the value of the keyword is judged, and the demodulation algorithm of GMSK, 8PSK or 16QAM modulation and demodulation mode is entered according to the judgment result. The demodulated data is decoded by the channel, and the decoded bit data is sent to the protocol layer.

[0014] A further improvement of the technical solution of the present invention is that: The modulation algorithm of the GMSK modulation and demodulation method includes the following steps: the original data after keyword judgment is input into the GMSK modulation function, and the synchronization word is inserted according to the GMSK frame format to obtain GMSK transmission data; the obtained GMSK transmission data is differentially polarized to obtain output data; the output data is passed through a Gaussian filter to obtain filtered data, and the filtered data is phase modulated to obtain modulated output data; The demodulation algorithm of the GMSK modulation and demodulation method includes the following steps: matched filtering is performed on the received GMSK signal; coarse synchronization is performed on the matched filtered data to find the signal frame header; the output data after coarse synchronization is sent to the derotation function for derotation processing and frequency offset estimation, and then fine synchronization is performed to determine the exact position of the synchronization word; the output data after fine synchronization is first subjected to signal distortion correlation compensation and then decision demodulation to obtain the original data.

[0015] A further improvement of the technical solution of the present invention is that: 8PSK and 16QAM modulation and demodulation share the same modulation algorithm. The process includes: The original data, after keyword determination, is fed into the 8PSK or 16QAM modulation function. The synchronization word is inserted according to the 8PSK or 16QAM frame structure to generate the transmitted data. The transmitted data undergoes 8PSK or 16QAM-specific symbol mapping and symbol rotation to generate the modulated output data. The demodulation algorithms for 8PSK and 16QAM modulation and demodulation are the same. The process includes: performing matched filtering on the 8PSK or 16QAM signal inputted by the receiving RF front end through the hardware, using the output after matched filtering as the receiving function data of 8PSK or 16QAM, performing coarse frequency offset estimation based on the receiving function data to obtain a preliminary frequency offset result, and then performing coarse frequency offset compensation on the input signal to obtain the output data after coarse frequency offset compensation; performing coarse synchronization on the output data after coarse frequency offset compensation to roughly locate the synchronization head position of the signal frame, calculating the phase rotation result based on the synchronization head position data, and using the phase The rotation result is used to derotate the input data of the coarse synchronization processing to obtain the derotated data; the derotated data is subjected to precise frequency offset estimation, and the precise frequency offset result is calculated and compensated to obtain the precise frequency offset compensated data; the precise frequency offset compensated data is subjected to precise synchronization to accurately locate the optimal starting position of the synchronization word; according to the frame structure of 8PSK or 16QAM, downsampling is performed at the oversampling rate OSR, and a symbol sequence of the corresponding length of 8PSK or 16QAM is extracted. The sequence is subjected to phase offset compensation to obtain the precise symbol sequence, and finally, the demodulated output data is obtained through decision demodulation.

[0016] In a third aspect of the present invention, an electronic device is provided, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, the cross-mode remote communication integrated networking adaptive method as described in any one of the first aspects of the present invention is implemented.

[0017] In a fourth aspect, the present invention provides a non-transitory computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the cross-mode remote communication integrated networking adaptation method as described in any one of the first aspects of the present invention is implemented.

[0018] Compared with the prior art, the present invention has the following beneficial effects: The present invention provides a cross-mode remote communication integrated networking adaptive method, which takes into account the difference in data volume between the control channel and the service channel and provides a method for automatically switching data bandwidth, which can meet the transmission needs of larger data services. Specifically, the present invention provides a method for dynamically adjusting the modulation modes of GMSK, 8PSK and 16QAM, which solves the technical problems of insufficient data bandwidth and waste of data bandwidth that may be caused by a single modulation mode, and can be applied to EPDT terminal equipment. In the technical solution of the present invention, a fixed modulation mode is used for the control channel, and the service channel dynamically switches to different modulation modes according to the keyword indication in the downlink control signaling of the control channel, so as to realize dynamic configuration of the service channel bandwidth, greatly improve the utilization efficiency of the 230M frequency band bandwidth, and reduce the waste of frequency resources. To further explain, the technical solution of the present invention uses GMSK, 8PSK, and 16QAM modulation methods, providing data bandwidths of 25K, 50K, and 100K, respectively, to meet the transmission needs of larger data services. Taking into account the difference in data volume between control channels and traffic channels, the present invention provides a method for automatically switching data bandwidth to address the shortcomings of a single data transmission method. For example, using GMSK modulation alone may result in insufficient data bandwidth when transmitting large amounts of data; using 8PSK modulation alone may waste data bandwidth when transmitting small amounts of data, and may result in insufficient bandwidth when transmitting large amounts of data; using 16QAM modulation alone may waste data bandwidth when transmitting small amounts of data; using different hardware devices for data transmission according to different data bandwidths will increase procurement costs. BRIEF DESCRIPTION OF THE DRAWINGS In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below; obviously, the drawings described below are some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 1 is a flow chart of a cross-mode remote communication integrated networking adaptive method according to an embodiment of the present invention; Figure 2 1 is a flow chart of the transmitting end software in an embodiment of the present invention; Figure 3 1 is a flowchart of the receiving end software in an embodiment of the present invention; Figure 4 1 is a flow chart of a GMSK transmission modulation algorithm according to an embodiment of the present invention; Figure 5 1 is a flow chart of a GMSK receiving and demodulating algorithm according to an embodiment of the present invention; Figure 6 1 is a flow chart of a transmission modulation algorithm for 8PSK and 16QAM in an embodiment of the present invention; Figure 7 1 is a flow chart of a receiving and demodulating algorithm for 8PSK and 16QAM in an embodiment of the present invention; Figure 8 It is a schematic diagram of a cross-mode remote communication integrated networking adaptive system in an embodiment of the present invention. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments and technical solutions are only part of the embodiments of the present invention, not all of the embodiments.

[0021] All other embodiments obtained by persons of ordinary skill in the art based on the technical solutions disclosed in the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to these processes, methods, products, or apparatuses.

[0022] See also Figure 1 , an embodiment of the present invention provides a cross-mode remote communication integrated networking adaptive method, comprising the following steps: Step 1: Determine the channel access mode of the power professional data transmission terminal; wherein the channel access mode is control channel access or service channel access; Step 2: Based on the channel access mode, determine the modulation and demodulation mode according to preset rules; wherein, when the channel access mode is control channel access, the control channel uses Gaussian minimum shift keying (GMSK) modulation and demodulation mode; when the channel access mode is service channel access, the service channel dynamically switches to one of three modulation and demodulation modes: Gaussian minimum shift keying (GMSK), 8-phase shift keying (8PSK), and 16-quadrature amplitude modulation (16QAM) according to the indication of the keyword in the control channel downlink control signaling; GMSK, 8PSK, and 16QAM modulation and demodulation modes correspond to 25K, 50K, and 100K data bandwidths, respectively. In a further specific exemplary technical solution, the CHSP keyword can be used.

[0023] The technical solution disclosed in the embodiments of the present invention specifies the modulation and demodulation mode for the service channel by defining the CHSP keyword in the PD_GRANG and TD_GRANG keywords in the downlink control signaling of the control channel access method. Leveraging the proactive nature of the control channel, EPDT terminals are pre-notified to enter the corresponding modulation and demodulation algorithm process, achieving the expansion and dynamic configuration of the EPDT service channel bandwidth. For further terminology explanation, GMSK (Gaussian Minimum Shift Keying) is a modulation method commonly used in wireless communications. It modulates the signal using a Gaussian filter to ensure good spectral characteristics and reduce out-of-band radiation. 8PSK (8-Phase Shift Keying) is a digital modulation method in which the carrier phase is divided into eight possible values, each representing three bits of data. 16QAM (16 Quadrature Amplitude Modulation) is a digital modulation method that uses 16 different complex signals to represent 16 different symbols, each representing four bits of data.

[0024] The technical solutions in this embodiment provide a solution for data transmission in the electric power wireless communication system (EPDT system) with a larger data bandwidth than the PDT system. While maintaining a fixed control channel modulation and demodulation scheme, this solution, through the development of a call control layer transmission protocol, enables dynamic allocation of service channel bandwidth. This significantly improves bandwidth utilization efficiency in the 230 MHz frequency band while ensuring data transmission bandwidth, reducing frequency waste. Furthermore, three modulation and demodulation schemes are implemented on a single EPDT device, improving hardware utilization efficiency and reducing equipment costs.

[0025] See also Figures 2 to 7In a specific embodiment of the present invention, in the step of dynamically switching the traffic channel to one of the three modulation and demodulation modes of GMSK, 8PSK, and 16QAM according to the indication of the CHSP keyword in the downlink control signaling of the control channel: The CHSP keyword is the BIT[26:27] bit of the control channel downlink signaling PD_GRANG signaling and TD_GRANG signaling, and is specifically defined as: 00 indicates that the service channel uses a 25kHz channel bandwidth and GMSK modulation and demodulation method, 01 indicates that the service channel uses a 50kHz channel bandwidth and 8PSK modulation and demodulation method, and 10 indicates that the service channel uses a 100kHz channel bandwidth and 16QAM modulation and demodulation method.

[0026] In a specific embodiment of the present invention, in the step of dynamically switching the traffic channel to one of the three modulation and demodulation modes of GMSK, 8PSK, and 16QAM according to the indication of the CHSP keyword in the downlink control signaling of the control channel, the GMSK, 8PSK, and 16QAM modulation and demodulation modes are divided into two parts: modulation and demodulation, which correspond to the transmitting part and the receiving part of the EPDT device respectively.

[0027] like Figure 2 As shown, in the specific exemplary technical solution, the steps of the transmitting part are as follows: Step 1: The protocol layer prepares the data to be transmitted; Step 2: Transmit data and perform channel coding; Step 3: The software determines whether the value of the CHSP keyword is 00, 01, or 11; Step 4: Enter GMSK, 8PSK or 16QAM modulation algorithm according to the judgment result of step 3; Step 5: The modulated data is sent to the RF circuit through the transmit filter.

[0028] like Figure 3 As shown, in the specific exemplary technical solution, the receiving steps are as follows: Step 1: The signal is sent to the demodulation function entrance through the radio frequency circuit; Step 2: The software determines whether the value of the CHSP keyword is 00, 01, or 11; Step 3: Enter the GMSK, 8PSK or 16QAM demodulation algorithm according to the judgment result of step 2; Step 4: The demodulated data is subjected to channel decoding; Step 5: The decoded bit data is sent to the protocol layer.

[0029] Specifically, the data transmission flow of the traffic channel is as follows: Figure 2As shown in the figure, after the protocol module is ready to transmit data, the data generated by the encoding module is sent to different modulation algorithm modules according to the judgment result of the CHSP keyword: if CHSP is 00, the encoded data is sent to the GMSK modulation algorithm, if CHSP is 01, the encoded data is sent to the 8PSK modulation algorithm, and if CHSP is 11, the encoded data is sent to the 16QAM modulation algorithm. The modulated data will be sent to the RF device through the hardware interface in the form of IQ data. The receiving data flow of the service channel is as follows: Figure 3 As shown in the figure, the data received by the RF front-end device enters the DSP device memory in the form of IQ data through the hardware interface, and is then sent to different demodulation algorithm modules according to the CHSP judgment result: if the CHSP is 00, the IQ data is sent to the GMSK demodulation algorithm, if the CHSP is 01, the IQ data is sent to the 8PSH demodulation algorithm, and if the CHSP is 11, the IQ data is sent to the 16QAM demodulation algorithm. The data generated by the IQ data after passing through the demodulation module is then sent to the protocol module through the decoding module.

[0030] Furthermore, the GMSK transmission modulation algorithm process is as follows Figure 4 As shown in the figure, after CHSP judgment, the original data is sent to the GMSK modulation function, and the synchronization word is inserted according to the GMSK frame format to obtain the GMSK transmission data. The data is then differentially polarized to obtain the output data, and then the data is passed through a Gaussian filter to obtain the filtered data. The data is then phase-modulated to obtain the modulated output data. The GMSK receiving and demodulation algorithm process is as follows: Figure 5 As shown in the figure, the received GMSK signal is matched filtered. The signal recognition ability of the data after the matched filter is enhanced. The data is then sent to the coarse synchronization module to find the frame header of the signal. The output of the function is sent to the derotation function for derotation processing and frequency offset estimation. Its output will be used as the input of the receiving fine synchronization module for precise synchronization. After precise synchronization, the exact position of the synchronization word can be found. After the output data is correlated and compensated, it can be demodulated into the original data after passing through the judgment module.

[0031] Furthermore, the transmission algorithm processes of 8PSK and 16QAM are the same, such as Figure 6 As shown in the figure, after CHSP judgment, the original data is sent to the 8PSK and 16QAM modulation functions, and the corresponding transmission data is obtained after the synchronization word is inserted according to the frame structure of 8PSK or 16QAM. The transmission data is subjected to the specific symbol mapping relationship and symbol rotation of 8PSK or 16QAM to obtain the modulated output data. The receiving algorithm process of 8PSK and 16QAM is the same, as shown in the figure. Figure 7As shown in the figure, the 8PSK or 16QAM input data inputted by the hardware of the receiving RF front end is filtered to improve the signal quality. The output after matched filtering will be used as the receiving function data of 8PSK or 16QAM. The data is sent to the coarse frequency offset estimation module to obtain the preliminary frequency offset result. The input signal is then coarsely compensated for the frequency offset to obtain the output data after coarse frequency offset compensation. The data is then sent to the coarse synchronization module for coarse synchronization, and the synchronization header position of the signal frame is roughly located. The phase rotation result is calculated according to the synchronization header data, and the phase rotation result is used to calculate the phase rotation result. The result is derotated on the input data of the coarse synchronization module to obtain the derotated data, which is sent to the fine frequency deviation estimation module to calculate the accurate frequency deviation result and perform frequency deviation compensation to obtain the compensated data, which is then sent to the fine synchronization module to obtain the optimal starting position of the synchronization word. Then, according to the frame structure of 8PSK and 16QAM, down-sampling is performed at the oversampling rate OSR, and the symbol sequence of the corresponding length of 8PSK and 16QAM is extracted. The sequence is phase-biased compensated to obtain the accurate symbol sequence, and then after judgment, the demodulated output data is obtained.

[0032] To explain the terminology, matched filtering is a signal processing technique that maximizes the correlation between the signal and the filter by designing a filter that matches a known signal waveform, thereby improving signal quality and interpretability. Frequency offset estimation is a technique used to estimate the frequency offset in a received signal's spectrum due to factors such as carrier frequency error or the Doppler effect. Coarse synchronization is the process of quickly finding the start of a signal frame in a communication system to ensure accurate framing for subsequent processing. Fine synchronization, based on coarse synchronization, further precisely aligns data to ensure time synchronization between the receiver and transmitter, enabling efficient data transmission. Derotation is the process of performing the inverse phase rotation on the received signal using a predefined rotation signal, converting the complex baseband signal into a format more suitable for subsequent processing. I / Q refers to the real (in-phase) and imaginary (quadrature) components of a signal, often used in communication systems to represent the two orthogonal components of a modulated signal. DSP (digital signal processing) refers to the process of analyzing, modifying, and synthesizing signals using digital technology.

[0033] In summary, the technical solution of the embodiments of the present invention is characterized by enabling on-demand allocation of traffic channel bandwidth based on the bandwidth requirements of the data, using the value of the CHSP keyword in the common control channel downlink signaling. This effectively improves channel utilization efficiency while ensuring traffic channel bandwidth. The technical solution of the embodiments of the present invention provides a solution for data transmission in the electric power wireless communication system (EPDT system) with a larger data bandwidth than that of the PDT system. While maintaining a fixed control channel modulation and demodulation scheme, the development of a call control layer transmission protocol enables dynamic allocation of traffic channel bandwidth. This significantly improves bandwidth utilization efficiency in the 230 MHz frequency band while ensuring data transmission bandwidth, reducing frequency band waste. Furthermore, three modulation and demodulation schemes are implemented on a single EPDT device, improving hardware utilization efficiency and reducing equipment costs.

[0034] The following are device embodiments of the present invention, which can be used to perform the method embodiments of the present invention. For details not disclosed in the device embodiments, please refer to the method embodiments of the present invention.

[0035] See also Figure 8 In an embodiment of the present invention, a cross-mode remote communication integrated networking adaptive system is provided, comprising: The channel access mode acquisition module is used to determine the channel access mode of the power professional data transmission terminal; wherein the channel access mode is control channel access or service channel access; A modulation and demodulation mode determination module is used to determine the modulation and demodulation mode according to preset rules based on the channel access mode; wherein, when the channel access mode is control channel access, the control channel uses Gaussian minimum shift keying GMSK modulation and demodulation mode; when the channel access mode is service channel access, the service channel dynamically switches to one of the three modulation and demodulation modes of Gaussian minimum shift keying GMSK, 8-phase shift keying 8PSK, and 16-quadrature amplitude modulation 16QAM according to the indication of the keyword in the control channel downlink control signaling; the three modulation and demodulation modes of GMSK, 8PSK, and 16QAM correspond to 25K, 50K, and 100K data bandwidths, respectively.

[0036] In one embodiment of the present invention, a computer device is provided, comprising a processor and a memory, wherein the memory is configured to store a computer program, the computer program including program instructions, and the processor is configured to execute the program instructions stored in the computer storage medium. The processor may be a central processing unit (CPU), or may be another general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. It is the computing core and control core of the terminal, and is suitable for implementing one or more instructions, specifically for loading and executing one or more instructions in the computer storage medium to implement the corresponding method flow or corresponding function. The processor described in this embodiment of the present invention can be used to perform operations of the cross-mode remote communication integrated networking adaptive method.

[0037] In one embodiment of the present invention, a storage medium is provided, specifically a computer-readable storage medium (Memory). The computer-readable storage medium is a memory device in a computer device, used to store programs and data. It is understood that the computer-readable storage medium herein may include both built-in storage media in the computer device and, of course, extended storage media supported by the computer device. The computer-readable storage medium provides storage space that stores the terminal's operating system. Furthermore, the storage space also stores one or more instructions suitable for being loaded and executed by a processor. These instructions may be one or more computer programs (including program code). It should be noted that the computer-readable storage medium herein may be high-speed Random Access Memory (RAM) or non-volatile memory, such as at least one disk drive. The processor may load and execute the one or more instructions stored in the computer-readable storage medium to implement the corresponding steps of the cross-modal telecommunication integrated networking adaptive method described in the above-mentioned embodiment.

[0038] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware. Furthermore, the present application may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, optical storage, etc.) containing computer-usable program code.

[0039] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0040] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0041] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 The steps for the function specified in one or more boxes.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered by the scope of protection of the claims of the present invention.

Claims

1. A cross-mode remote communication integrated networking adaptive method, characterized in that: The following steps are involved: Determine the channel access mode of the power professional data transmission terminal; the channel access mode is control channel access or service channel access; Based on the channel access method, the modulation and demodulation method is determined according to preset rules; wherein, when the channel access method is control channel access, the control channel uses Gaussian minimum shift keying GMSK modulation and demodulation method; when the channel access method is service channel access, the service channel dynamically switches to one of the three modulation and demodulation methods of Gaussian minimum shift keying GMSK, 8-phase shift keying 8PSK, and 16-quadrature amplitude modulation 16QAM according to the indication of the keyword in the downlink control signaling of the control channel; the three modulation and demodulation methods of GMSK, 8PSK, and 16QAM correspond to 25K, 50K, and 100K data bandwidths, respectively.

2. A cross-mode remote communication integrated networking adaptive method according to claim 1, characterized in that: In the step where the service channel dynamically switches to one of the three modulation and demodulation modes of Gaussian minimum shift keying (GMSK), 8-phase shift keying (8PSK), and 16-quadrature amplitude modulation (16QAM) according to the indication of the keyword in the control channel downlink control signaling, the keyword is the BIT[26:27] bit of the control channel downlink signaling PD_GRANG signaling and TD_GRANG signaling; wherein the keyword is defined as: 00 indicates that the service channel uses 25khz channel bandwidth and GMSK modulation and demodulation mode, 01 indicates that the service channel uses 50khz channel bandwidth and 8PSK modulation and demodulation mode, and 10 indicates that the service channel uses 100khz channel bandwidth and 16QAM modulation and demodulation mode.

3. A cross-mode remote communication integrated networking adaptive method according to claim 1, characterized in that: The three modulation and demodulation modes of GMSK, 8PSK and 16QAM are divided into two parts: modulation and demodulation. Modulation and demodulation correspond to the transmitting part and receiving part of the power professional data transmission equipment respectively. The transmission part executes the following steps: the protocol layer prepares the transmission data, performs channel coding on the transmission data, determines the value of the keyword, enters the modulation algorithm of GMSK, 8PSK or 16QAM modulation and demodulation mode according to the determination result, and sends the modulated data to the RF circuit through the transmission filter; The execution steps of the receiving part are as follows: the signal is sent to the demodulation function entrance through the RF circuit, the value of the keyword is judged, and the demodulation algorithm of GMSK, 8PSK or 16QAM modulation and demodulation mode is entered according to the judgment result. The demodulated data is decoded by the channel, and the decoded bit data is sent to the protocol layer.

4. A cross-mode remote communication integrated networking adaptive method according to claim 3, characterized in that: The modulation algorithm of the GMSK modulation and demodulation method includes the following steps: the original data after keyword judgment is input into the GMSK modulation function, and the synchronization word is inserted according to the GMSK frame format to obtain GMSK transmission data; the obtained GMSK transmission data is differentially polarized to obtain output data; the output data is passed through a Gaussian filter to obtain filtered data, and the filtered data is phase modulated to obtain modulated output data; The demodulation algorithm of the GMSK modulation and demodulation method includes the following steps: matched filtering is performed on the received GMSK signal; coarse synchronization is performed on the matched filtered data to find the signal frame header; the output data after coarse synchronization is sent to the derotation function for derotation processing and frequency offset estimation, and then fine synchronization is performed to determine the exact position of the synchronization word; the output data after fine synchronization is first subjected to signal distortion correlation compensation and then decision demodulation to obtain the original data.

5. A cross-mode remote communication integrated networking adaptive method according to claim 3, characterized in that: 8PSK and 16QAM modulation and demodulation share the same modulation algorithm. The process includes: The original data, after keyword determination, is fed into the 8PSK or 16QAM modulation function. The synchronization word is inserted according to the 8PSK or 16QAM frame structure to generate the transmitted data. The transmitted data undergoes 8PSK or 16QAM-specific symbol mapping and symbol rotation to generate the modulated output data. The demodulation algorithms for 8PSK and 16QAM modulation and demodulation are the same. The process includes: performing matched filtering on the 8PSK or 16QAM signal inputted by the receiving RF front end through the hardware, using the output after matched filtering as the receiving function data of 8PSK or 16QAM, performing coarse frequency offset estimation based on the receiving function data to obtain a preliminary frequency offset result, and then performing coarse frequency offset compensation on the input signal to obtain the output data after coarse frequency offset compensation; performing coarse synchronization on the output data after coarse frequency offset compensation to roughly locate the synchronization head position of the signal frame, calculating the phase rotation result based on the synchronization head position data, and using the phase The rotation result is used to derotate the input data of the coarse synchronization processing to obtain the derotated data; the derotated data is subjected to precise frequency offset estimation, and the precise frequency offset result is calculated and compensated to obtain the precise frequency offset compensated data; the precise frequency offset compensated data is subjected to precise synchronization to accurately locate the optimal starting position of the synchronization word; according to the frame structure of 8PSK or 16QAM, downsampling is performed at the oversampling rate OSR, and a symbol sequence of the corresponding length of 8PSK or 16QAM is extracted. The sequence is subjected to phase offset compensation to obtain the precise symbol sequence, and finally, the demodulated output data is obtained through decision demodulation.

6. A cross-mode remote communication integrated networking adaptive system, characterized in that: include: The channel access mode acquisition module is used to determine the channel access mode of the power professional data transmission terminal; wherein the channel access mode is control channel access or service channel access; A modulation and demodulation mode determination module is used to determine the modulation and demodulation mode according to preset rules based on the channel access mode; wherein, when the channel access mode is control channel access, the control channel uses Gaussian minimum shift keying GMSK modulation and demodulation mode; when the channel access mode is service channel access, the service channel dynamically switches to one of the three modulation and demodulation modes of Gaussian minimum shift keying GMSK, 8-phase shift keying 8PSK, and 16-quadrature amplitude modulation 16QAM according to the indication of the keyword in the control channel downlink control signaling; the three modulation and demodulation modes of GMSK, 8PSK, and 16QAM correspond to 25K, 50K, and 100K data bandwidths, respectively.

7. The cross-mode remote communication integrated networking adaptive system according to claim 6, characterized in that: In the step where the service channel dynamically switches to one of the three modulation and demodulation modes of Gaussian minimum shift keying (GMSK), 8-phase shift keying (8PSK), and 16-quadrature amplitude modulation (16QAM) according to the indication of the keyword in the control channel downlink control signaling, the keyword is the BIT[26:27] bit of the control channel downlink signaling PD_GRANG signaling and TD_GRANG signaling; wherein the keyword is defined as: 00 indicates that the service channel uses 25khz channel bandwidth and GMSK modulation and demodulation mode, 01 indicates that the service channel uses 50khz channel bandwidth and 8PSK modulation and demodulation mode, and 10 indicates that the service channel uses 100khz channel bandwidth and 16QAM modulation and demodulation mode.

8. The cross-mode remote communication integrated networking adaptive system according to claim 6, characterized in that: The three modulation and demodulation modes of GMSK, 8PSK and 16QAM are divided into two parts: modulation and demodulation. Modulation and demodulation correspond to the transmitting part and receiving part of the power professional data transmission equipment respectively. The transmission part executes the following steps: the protocol layer prepares the transmission data, performs channel coding on the transmission data, determines the value of the keyword, enters the modulation algorithm of GMSK, 8PSK or 16QAM modulation and demodulation mode according to the determination result, and sends the modulated data to the RF circuit through the transmission filter; The execution steps of the receiving part are as follows: the signal is sent to the demodulation function entrance through the RF circuit, the value of the keyword is judged, and the demodulation algorithm of GMSK, 8PSK or 16QAM modulation and demodulation mode is entered according to the judgment result. The demodulated data is decoded by the channel, and the decoded bit data is sent to the protocol layer.

9. The cross-mode remote communication integrated networking adaptive system according to claim 8, characterized in that: The modulation algorithm of the GMSK modulation and demodulation method includes the following steps: the original data after keyword judgment is input into the GMSK modulation function, and the synchronization word is inserted according to the GMSK frame format to obtain GMSK transmission data; the obtained GMSK transmission data is differentially polarized to obtain output data; the output data is passed through a Gaussian filter to obtain filtered data, and the filtered data is phase modulated to obtain modulated output data; The demodulation algorithm of the GMSK modulation and demodulation method includes the following steps: matched filtering is performed on the received GMSK signal; coarse synchronization is performed on the matched filtered data to find the signal frame header; the output data after coarse synchronization is sent to the derotation function for derotation processing and frequency offset estimation, and then fine synchronization is performed to determine the exact position of the synchronization word; the output data after fine synchronization is first subjected to signal distortion correlation compensation and then decision demodulation to obtain the original data.

10. The cross-mode remote communication integrated networking adaptive system according to claim 8, characterized in that: 8PSK and 16QAM modulation and demodulation share the same modulation algorithm. The process includes: The original data, after keyword determination, is fed into the 8PSK or 16QAM modulation function. The synchronization word is inserted according to the 8PSK or 16QAM frame structure to generate the transmitted data. The transmitted data undergoes 8PSK or 16QAM-specific symbol mapping and symbol rotation to generate the modulated output data. The demodulation algorithms for 8PSK and 16QAM modulation and demodulation are the same. The process includes: performing matched filtering on the 8PSK or 16QAM signal inputted by the receiving RF front end through the hardware, using the output after matched filtering as the receiving function data of 8PSK or 16QAM, performing coarse frequency offset estimation based on the receiving function data to obtain a preliminary frequency offset result, and then performing coarse frequency offset compensation on the input signal to obtain the output data after coarse frequency offset compensation; performing coarse synchronization on the output data after coarse frequency offset compensation to roughly locate the synchronization head position of the signal frame, calculating the phase rotation result based on the synchronization head position data, and using the phase The rotation result is used to derotate the input data of the coarse synchronization processing to obtain the derotated data; the derotated data is subjected to precise frequency offset estimation, and the precise frequency offset result is calculated and compensated to obtain the precise frequency offset compensated data; the precise frequency offset compensated data is subjected to precise synchronization to accurately locate the optimal starting position of the synchronization word; according to the frame structure of 8PSK or 16QAM, downsampling is performed at the oversampling rate OSR, and a symbol sequence of the corresponding length of 8PSK or 16QAM is extracted. The sequence is subjected to phase offset compensation to obtain the precise symbol sequence, and finally, the demodulated output data is obtained through decision demodulation.

11. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the program, the cross-mode remote communication integrated networking adaptive method according to any one of claims 1 to 5 is implemented.

12. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the cross-mode telecommunication integrated networking adaptive method according to any one of claims 1 to 5 is implemented.

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