CN211457135U - Communication radio station - Google Patents
Communication radio station Download PDFInfo
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- CN211457135U CN211457135U CN202020388891.3U CN202020388891U CN211457135U CN 211457135 U CN211457135 U CN 211457135U CN 202020388891 U CN202020388891 U CN 202020388891U CN 211457135 U CN211457135 U CN 211457135U
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Abstract
The application relates to a communication station comprising: the CPRI interface is used for connecting the radio frequency processing circuit; the optical communication module is connected with the CPRI interface; the main control module comprises an embedded chip; the embedded chip is connected with the optical communication module; the business module is connected with the embedded chip; and the analog-digital/digital-analog conversion module is connected with the service module. According to the optical communication module and the high-speed CPRI interface, the analog-digital/digital-analog conversion module and the analog-digital sampling data are processed and separated through the optical communication module and the high-speed CPRI interface, so that the integrated circuit board design of a communication radio station is realized, meanwhile, the digitalized processing of radio frequency signals can be realized through the optical communication module and the high-speed CPRI interface by different board clamping pieces, and the volume of the communication radio station is reduced.
Description
Technical Field
The present application relates to the field of wireless communications technologies, and in particular, to a communication station.
Background
With the development of wireless communication technology, communication technology has emerged. The current mainstream communication radio station can be divided into a control module, an interface adaptation module and a service module according to functions, and a functional block diagram of the communication radio station can be shown in fig. 1. The control module interacts data with the service module through a Universal Asynchronous Receiver Transmitter (UART) INTERFACE, the control module is connected with the INTERFACE adaptation module through an HOST INTERFACE (HPI), and the INTERFACE adaptation module interacts data with the service module through an External Memory INTERFACE (EMIF).
However, in the implementation process, the inventor finds that at least the following problems exist in the conventional technology: the prior art is difficult to carry out the integrated circuit board design, has bulky problem.
SUMMERY OF THE UTILITY MODEL
Therefore, it is necessary to provide a communication station which can be reduced in size and implemented in a board-card design, in order to solve the technical problem that the board-card design is difficult to implement in the conventional technology.
In order to achieve the above object, an embodiment of the present application provides a communication station, including:
the CPRI interface is used for connecting the radio frequency processing circuit;
the optical communication module is connected with the CPRI interface;
the main control module comprises an embedded chip; the embedded chip is connected with the optical communication module;
the business module is connected with the embedded chip;
and the analog-digital/digital-analog conversion module is connected with the service module.
In one embodiment, the embedded chip comprises a processing unit and a programmable logic unit;
the programmable logic unit is respectively connected with the service module and the processing unit; the processing unit is connected with the optical communication module.
In one embodiment, the main control module further comprises a serial port chip and a network port chip;
the serial port chip and the network port chip are both connected with the processing unit.
In one embodiment, the editable logic unit comprises a control serial port and a data transmission serial port;
the control serial port and the data transmission serial port are both connected with the service module.
In one embodiment, the embedded chip further comprises a block memory; the processing unit is connected with the programmable logic unit through the block memory.
In one embodiment, the master control module further comprises an RTC clock; the RTC clock is connected with the processing unit.
In one embodiment, the master control module further comprises an expansion memory; the expansion memory is connected with the processing unit.
In one embodiment, the programmable logic unit further comprises a secret interface and/or an external serial port.
In one embodiment, the system further comprises a sound device;
the sound equipment is respectively connected with the analog-digital/digital-analog conversion module and the service module.
In one embodiment, the embedded chip is a ZYNQ7000 chip, or an OMAP-L138 chip.
One of the above technical solutions has the following advantages and beneficial effects:
the communication radio station in each embodiment of the application comprises a CPRI interface, an optical communication module, a main control module, a service module and an analog-digital/digital-analog conversion module, wherein the main control module comprises an embedded chip; the embedded chip is respectively connected with the service module and the optical communication module; the optical communication module is connected with the CPRI interface; the CPRI interface is used for connecting the radio frequency processing circuit; the service module is connected with the analog-digital/digital-analog conversion module. According to the optical communication module and the high-speed CPRI interface, the analog-digital/digital-analog conversion module and the analog-digital sampling data are processed and separated through the optical communication module and the high-speed CPRI interface, so that the integrated circuit board design of a communication radio station is realized, meanwhile, the digitalized processing of radio frequency signals can be realized through the optical communication module and the high-speed CPRI interface by different board clamping pieces, and the volume of the communication radio station is reduced.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:
FIG. 1 is a functional block diagram of a conventional technique;
FIG. 2 is a first schematic block diagram of a communication station in one embodiment;
FIG. 3 is a second schematic block diagram of a communication station in one embodiment;
fig. 4 is a third schematic block diagram of a communication station in one embodiment.
Detailed Description
To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present application are shown in the drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element and be integral therewith, or intervening elements may also be present. The terms "one end," "the other end," and the like are used herein for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The traditional communication radio station can be divided into a control module, an interface adaptation module and a service module according to functions, wherein the control module can be realized by an Advanced RISC machine (Advanced RISC microprocessor) and is used for completing functions of switching of radio station service waveforms, configuration management of parameters, display and report of states and the like. The interface adaptation module can be implemented by an FPGA (Field Programmable Gate Array), and is used to complete interface adaptation between a communication radio station and an external security interface, a data transmission interface, an RTC (Real-Time Clock) interface, a debugging interface, and the like, and conversion between analog and digital signals of a PTT (Push-to-talk) signal. The service module can be realized by a Digital Signal Processing (DSP) and a Field Programmable Gate Array (FPGA), and is mainly used for completing service waveforms such as fixed frequency, adaptive communication, 412 adaptive communication, automatic control communication and the like and reporting service waveform state information in real time.
In a traditional communication radio station, an A/D chip and A/D sampling data processing are combined together, so that the traditional communication radio station is difficult to design in a board card mode. Meanwhile, the control module, the interface adaptation module and the service module are separately arranged, the control module and the service module are connected through a UART interface, and the control module and the interface adaptation module are connected through an HPI interface. However, in practical development, there is often not enough UART interface between the control module and the service module, so the interface needs to be extended by other means. In addition, additional development of driving software is required to realize data interaction between the control module and the interface adaptation module, applicability is poor, and development efficiency of products is greatly reduced.
The communication radio station in each embodiment of the application comprises a CPRI interface, an optical communication module, a main control module, a service module and an analog-digital/digital-analog conversion module, wherein the main control module comprises an embedded chip; the embedded chip is respectively connected with the service module and the optical communication module; the optical communication module is connected with the CPRI interface; the CPRI interface is used for connecting the radio frequency processing circuit; the service module is connected with the analog-digital/digital-analog conversion module. According to the optical communication module and the high-speed CPRI interface, the analog-digital/digital-analog conversion module and the analog-digital sampling data are processed and separated through the optical communication module and the high-speed CPRI interface, so that the integrated circuit board design of a communication radio station is realized, meanwhile, the digitalized processing of radio frequency signals can be realized through the optical communication module and the high-speed CPRI interface by different board clamping pieces, and the volume of the communication radio station is reduced.
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
In one embodiment, as shown in fig. 2, there is provided a communication station comprising:
the CPRI interface is used for connecting the radio frequency processing circuit;
the optical communication module is connected with the CPRI interface;
the main control module comprises an embedded chip; the embedded chip is connected with the optical communication module;
the business module is connected with the embedded chip;
and the analog-digital/digital-analog conversion module is connected with the service module.
Specifically, the communication radio station can be applied to the board card design of carrier-based, vehicle-mounted, backpack, handheld and other communication radio stations. The main control module in each embodiment of the application is used for supporting various service functions, completing transceiving control, operation interface display control and real-time clock configuration management, and providing an external hardware interface. The service module can be used for completing functions of call link establishment, data transceiving, voice communication, short message transceiving and the like of various service waveforms. Further, the service module can be realized by a DSP and an FPGA.
It should be noted that, when the main control module and the service module of the present application implement the above functions, there is no improvement in the method level, and a person skilled in the art can transplant the method applied in the conventional communication radio station control module and the interface adaptation module to the embedded chip, so that the main control module implements the above functions. Similarly, a person skilled in the art can migrate the method applied in the conventional communication station service module to the service module of the present application, so that the service module can perform the above-mentioned functions.
In this application, the communication radio station may include a CPRI interface, an optical communication module, a main control module, and a service module, where the main control module includes an embedded chip. The CPRI (Common Public Radio Interface) Interface may be an Interface for transmitting data at a high speed; the optical communication module may be a communication module using light as a carrier; the embedded chip can be a processing chip for controlling and assisting the operation of the communication radio station; the service module can be a module used for completing various types of service waveforms and/or reporting service waveform state information in real time in the communication radio station; the analog-to-digital/digital-to-analog conversion module may be a device or a circuit for realizing mutual conversion of an analog signal and a digital signal.
The CPRI interface is used to connect with a radio frequency processing circuit, which may be a circuit for performing signal processing on communication signals, where the signal processing includes, but is not limited to, signal amplification, signal filtering, signal synthesis, signal distribution, and the like. Further, the communication signal processed by the radio frequency processing circuit may be an analog signal; the CPRI interface may be used to connect a power amplifier in the radio frequency processing circuitry.
The optical communication module is respectively connected with the CPRI interface and the embedded chip, the embedded chip is connected with the service module, and the service module is connected with the analog-digital/digital-analog conversion module. The analog-digital/digital-analog conversion module completes digital-analog conversion or analog-digital conversion, the radio frequency processing circuit completes analog/digital sampling data processing, and the CPRI interface, the optical communication module, the embedded chip and the service module are sequentially arranged to form a high-speed data transmission channel. According to the method and the device, the analog-digital/digital-analog conversion module and the analog/digital sampling data are processed and separated through the high-speed data transmission channel, so that the board-card design can be realized.
When voice transmission is performed, the analog signal can complete data processing in the radio frequency signal processing circuit, and then sequentially passes through the CPRI interface, the optical communication module, the embedded chip and the service module, the processed analog signal is transmitted to the analog-digital/digital-analog conversion module, the analog-digital/digital-analog conversion module converts the received analog signal into a digital signal, and the digital signal is transmitted through the service module.
When voice receiving is carried out, the service module transmits the received digital signals to the analog-digital/digital-analog conversion module, the analog-digital/digital-analog conversion module carries out digital-analog conversion on the digital signals and transmits the analog signals obtained by conversion to the service module. The analog signal is transmitted to the radio frequency signal processing circuit through the service module, the embedded chip, the optical communication module and the CPRI interface in sequence, so that the analog signal can be processed through the radio frequency signal processing circuit. Further, the communication signal transmitted between the service module and the analog-to-digital/digital-to-analog conversion module may be a four-wire audio signal.
The communication radio station comprises a CPRI interface, an optical communication module, a main control module, a service module and an analog-digital/digital-analog conversion module, wherein the main control module comprises an embedded chip; the embedded chip is respectively connected with the service module and the optical communication module; the optical communication module is connected with the CPRI interface; the CPRI interface is used for connecting the radio frequency processing circuit; the service module is connected with the analog-digital/digital-analog conversion module. According to the optical communication module and the high-speed CPRI interface, the analog-digital/digital-analog conversion module and the analog-digital sampling data are processed and separated through the optical communication module and the high-speed CPRI interface, so that the integrated circuit board design of a communication radio station is realized, meanwhile, the digitalized processing of radio frequency signals can be realized through the optical communication module and the high-speed CPRI interface by different board clamping pieces, and the volume of the communication radio station is reduced.
In one embodiment, an embedded chip includes a processing unit and a programmable logic unit;
the programmable logic unit is respectively connected with the service module and the processing unit; the processing unit is connected with the optical communication module.
Specifically, the embedded chip may include a Processing unit and a Programmable Logic unit, that is, the embedded chip may be a chip including a PS (Processing System) terminal and a PL (Programmable Logic) terminal, where the Processing unit is the PS terminal and the Programmable Logic unit is the PL terminal.
The processing unit can be used for realizing the functions of the control module, and the programmable logic unit can be used for completing the functions of the interface adaptation module. The processing unit is respectively connected with the optical communication module and the programmable logic unit, and the programmable logic unit is connected with the service module. The CPRI interface, the optical communication module, the processing unit, the programmable logic unit and the service module are sequentially arranged to form a high-speed data transmission channel and can transmit communication signals, so that the analog-digital/digital-analog conversion module and the analog-digital sampling data are processed and separated, and the board-card design of a communication radio station is realized.
In one embodiment, the main control module further comprises a serial port chip and a network port chip;
the serial port chip and the network port chip are both connected with the processing unit.
Specifically, the main control module may further include a debug interface, and the debug interface may include a serial port chip and a network port chip. Further, the serial port chip may be an RS232 serial port chip.
In above-mentioned communication radio station, host system still includes serial ports chip and net gape chip, and serial ports chip and net gape chip are all connected to the processing unit to accessible serial ports chip and net gape chip are debugged the communication radio station, improve the development efficiency of communication radio station.
In one embodiment, the editable logic unit comprises a control serial port and a data transmission serial port;
the control serial port and the data transmission serial port are both connected with the service module.
Specifically, the control serial port may be a serial port that transmits a control signal to the service module; the data transmission serial port can be a serial port for transmitting communication data. The number of the control serial ports can be one or more; the number of the data transmission serial ports can be one or more. The processing unit can be connected with the service module through the control serial port, and the processing unit can be connected with the service module through the data transmission serial port.
The main control module transmits a control signal to the service module through the control serial port so as to configure the service waveform and the state information of the service module to be reported. The main control module can receive the configuration information input by the user, and carries out distribution and protocol adaptation processing on the received configuration information, and sends the corresponding parameters to the service module according to the frame format of the service waveform, and the service module carries out corresponding processing after receiving the parameters. When the service module needs to report the current running state, the state information can be sent to the main control module through the control serial port, further, the state information can be transmitted to the processing unit through the programmable logic unit, the processing unit analyzes the received state information, and reports the analyzed data to the user.
In the communication radio station, the programmable logic unit comprises a control serial port and a data transmission serial port, the control serial port is connected with the processing unit and the service module respectively, the data transmission serial port is connected with the processing unit and the service module respectively, and the peripheral interface adaptation can be met through the embedded chip, so that the volume of the communication radio station can be reduced, the applicability and the product development efficiency of the communication radio station can be improved, and the miniaturization and board-card design of the communication radio station can be realized.
In one embodiment, the embedded chip further comprises a block memory; the processing unit is connected with the programmable logic unit through the block memory.
Specifically, the embedded chip may further include a BRAM (Block RAM, Block memory), and the BRAM is connected between the processing unit and the programmable logic unit, so that data interaction and data sharing between the PS terminal and the PL terminal can be realized.
In one embodiment, the master control module further comprises an RTC clock; the RTC clock is connected with the processing unit.
Specifically, the RTC clock may be connected to the processing unit, and further, may be connected to the processing unit through an I2C (Inter-integrated circuit bus) bus, and may provide an accurate time reference for the processing unit.
In one embodiment, the master control module further comprises an expansion memory; the expansion memory is connected with the processing unit.
Specifically, the master control module further includes an expansion memory, which may be a DDR3(Double data rate) memory, and/or a FLASH memory. The storage space of the main control module can be improved by arranging the expansion memory, so that the communication radio station can complete the receiving and sending of more data.
In one embodiment, the programmable logic unit further comprises a secure interface and/or an external serial port.
Specifically, the main control module may include any one of a secure interface and an external serial port, or the main control module may include the secure interface and the external serial port. The number of the security interfaces can be one or more, and the number of the external serial ports can be one or more.
The external serial port can be connected with the processing unit, and the main control module can receive configuration information configured by a user through configuration of the external serial port, wherein the configuration information can comprise equipment parameters and equipment states. The main control module distributes and adapts the protocol to the received configuration information according to the received configuration information, and sends the corresponding parameters to the service module according to the frame format of the service waveform, and the service module performs corresponding processing after receiving the parameters. Meanwhile, when the master control module receives the state information reported by the service module, the data can be analyzed, and the analyzed data is reported to the user through an external serial port.
The security interface may be coupled to the processing unit, and the security interface may be configured to receive encrypted data for security services. When receiving the encrypted data, the main control module can transmit the encrypted data to the service module to complete the sending process of the confidential service. When the receiving process of the confidential service is carried out, the service module can transmit the received encrypted data to the main control module, and the main control module transmits the encrypted data through the confidential interface. Further, the main control module and the service module can complete the transmission of encrypted data through the data transmission serial port; the secure interface may be an RS232 interface.
In the communication radio station, the main control module comprises a confidential interface and/or an external serial port, so that transmission of confidential data can be realized through the confidential interface, and the confidentiality of the communication radio station is improved; and the data interaction between the user and the communication radio station can be realized through an external serial port, so that the applicability of the communication radio station is improved.
In one embodiment, a sound device is also included;
the sound equipment is respectively connected with the analog-digital/digital-analog conversion module and the service module.
Specifically, the communication station may further include a sound device respectively connected to the analog-to-digital/digital-to-analog conversion module and the service module, and the sound device may be configured to collect a sound signal or play a sound signal. Further, the sound device may be a microphone.
The sound equipment can transmit the PTT signal to the service module so that the service module can acquire the PTT state, the service module can transmit the analog sound signal to the analog-digital/digital-analog conversion module, the analog-digital/digital-analog conversion module converts the analog signal into a PCM (Pulse Code Modulation) Code and transmits the converted PCM Code to the service module, and the service module transmits the PCM Code to finish voice transmission. The voice receiving process is the same as the voice transmitting process in the above embodiment, and is not described again.
The communication radio station further comprises a sound device respectively connected with the analog-digital/digital-analog conversion module and the service module, so that sound signals can be collected or played through the sound device, PTT signals can be transmitted to the service module through the sound device, and the applicability of the communication radio station is improved.
In one embodiment, the embedded chip is a ZYNQ7000 chip, or an OMAP-L138 chip.
Specifically, the traditional power-on radio station is implemented by adopting a discrete ARM + FPGA mode, wherein ARM devices are usually selected from ARM3359, S3C2410 and the like, and FPGA devices are usually selected from XC7K160T, XC7K325T and the like. As shown in fig. 3, when the embedded chip is a ZYNQ7000 chip, the PS terminal is connected to the PL terminal through the BRAM, and the PL terminal is connected to the service module through the UART.
This application chooses SOC (System on Chip, System level Chip) of ZYNQ7000 as embedded Chip for use, has small, the advantage of PL end IP nuclear resource abundance, low power dissipation and easy extension for the communication radio station can satisfy peripheral interface adaptation, thereby can reduce the volume of communication radio station and improve the suitability and the product development efficiency of communication radio station, and then realizes miniaturization, the integrated circuit board design of communication radio station.
Meanwhile, the ZYNQ7000 chip can be developed through a Vivado development tool, provides a data interface for interaction between a PS end and a PL end, and has the advantages of easy expansion and transplantation of software codes, so that the development period can be shortened, and the research and development efficiency can be improved.
The interaction between the ZYNQ7000 chip and the rest modules adopts PL section instantiation UART, and interfaces such as UART, I2C, GPIO (General-purpose Input/Output) and the like can be instantiated through standardized IP verification according to design requirements, so that the ZYNQ7000 chip has the advantages of simplicity in use and strong expandability and portability.
The OMAP-L138 chip is an industrial processor integrating a DSP and an ARM, has the advantages of small size, low power consumption and easiness in expansion, can reduce the size of a communication radio station and improve the applicability and the product development efficiency of the communication radio station, and further realizes the miniaturization and board-card design of the communication radio station.
To facilitate understanding of the aspects of the present application, a specific example will be described below. As shown in fig. 4, a communication radio station is provided, which includes a CPRI interface, an analog-to-digital/digital-to-analog conversion module, a main control module, a service module, and a sound device, where the main control module includes a ZYNQ7000 chip, an RTC clock, a serial port chip, a network interface chip, a DDR3 memory, a FLASH memory, and an optical module, the ZYNQ7000 chip includes a PS terminal and a PL terminal, the PS terminal is connected to the serial port chip, the network interface chip, the DDR3 memory, the FLASH memory, the RTC clock, and the optical module is connected to the CPRI interface, and the CPRI interface is used.
The PL end comprises a confidential interface, an external serial port, a control serial port and a digital transmission serial port, the control serial port and the digital transmission serial port are both connected with a service module, and the service module is respectively connected with an analog-digital/digital-analog conversion module and sound equipment.
The user configures the configuration information of the device through the external serial port, when receiving the configuration information, the main control module performs distribution and protocol adaptation processing of the configuration information, sends corresponding parameters to the service module according to the frame format of the service waveform, and performs corresponding processing after receiving the configuration information. When the service waveform needs to report the current running state, the state information is sent to the main control module through the control serial port, the main control module analyzes the data, and the analyzed data is reported to the user through the external serial port.
The security service receives the encrypted data through the security interface, and the main control module forwards the encrypted data to the service module through the data transmission serial port when receiving the encrypted data, so that the security service is sent. When receiving the confidential service, the service module transmits the received encrypted data to the main control module through the data transmission serial port, and the main control module forwards the encrypted data to the confidential service.
When voice transmission is carried out, a user can transmit a PTT signal to the service module through the sound equipment so that the service module can acquire a PTT state, the service module can transmit an analog sound signal to the analog-digital/digital-analog conversion module, the analog-digital/digital-analog conversion module converts the analog signal into PCM codes, and the service module transmits the PCM codes to finish the voice transmission. The voice receiving process is as described in the above embodiments and will not be described in detail.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A communication station, comprising:
the CPRI interface is used for connecting the radio frequency processing circuit;
the optical communication module is connected with the CPRI interface;
the main control module comprises an embedded chip; the embedded chip is connected with the optical communication module;
the business module is connected with the embedded chip;
and the analog-to-digital/digital-to-analog conversion module is connected with the service module.
2. A communication station as claimed in claim 1, characterized in that the embedded chip comprises a processing unit and a programmable logic unit;
the programmable logic unit is respectively connected with the service module and the processing unit; the processing unit is connected with the optical communication module.
3. The communication radio station of claim 2, wherein the main control module further comprises a serial port chip and a network port chip;
the serial port chip and the network port chip are both connected with the processing unit.
4. The communication radio of claim 2, wherein the editable logic unit comprises a control serial port and a data transfer serial port;
the control serial port and the data transmission serial port are both connected with the service module.
5. A communication station as claimed in claim 2, characterized in that the embedded chip further comprises a block memory; the processing unit is connected with the programmable logic unit through the block memory.
6. A communication station as defined in claim 2, wherein the master module further comprises an RTC clock; the RTC clock is connected with the processing unit.
7. The communication station of claim 2, wherein the master module further comprises an expansion memory; the expansion memory is connected with the processing unit.
8. A communication station as claimed in any one of claims 2 to 7, characterized in that the programmable logic unit further comprises a secure interface and/or an external serial port.
9. A communication station as claimed in any one of claims 1 to 7, characterised by further comprising a sound device;
the sound equipment is respectively connected with the analog-digital/digital-analog conversion module and the service module.
10. A communication station as claimed in any one of claims 1 to 7, characterized in that the embedded chip is a ZYNQ7000 chip or an OMAP-L138 chip.
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| CN112866038A (en) * | 2021-03-09 | 2021-05-28 | 中国南方电网有限责任公司 | Chip communication management system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112866038A (en) * | 2021-03-09 | 2021-05-28 | 中国南方电网有限责任公司 | Chip communication management system |
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