CN115297379A - Multimode broadband carrier power line communication system - Google Patents
Multimode broadband carrier power line communication system Download PDFInfo
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- CN115297379A CN115297379A CN202210920713.4A CN202210920713A CN115297379A CN 115297379 A CN115297379 A CN 115297379A CN 202210920713 A CN202210920713 A CN 202210920713A CN 115297379 A CN115297379 A CN 115297379A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q9/00—Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/54—Systems for transmission via power distribution lines
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/12—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/30—Services specially adapted for particular environments, situations or purposes
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The embodiment of the application provides a multimode broadband carrier power line communication system, which comprises: a carrier circuit; the multimode power communication terminal is electrically connected with the carrier circuit and is used for providing a wireless local area network; the power consumption adjusting module is electrically connected with the carrier circuit and used for adjusting the power consumption of the carrier circuit; the integrated circuit module is used for being connected with the multimode electric power communication terminal and the power consumption adjusting module through the carrier circuit; a processor for electrical connection with the integrated circuit module. The embodiment of the application integrates broadband power carrier, micropower wireless and Bluetooth communication functions, can realize a four-in-one meter reading function, and supports the access of the sensing network node of the power internet of things to realize multi-channel and multi-mode data transmission. In addition, the chip can support various modulation and demodulation modes, support various networking modes and meet most of application scenes of the Internet of things.
Description
Technical Field
The embodiments of the present application belong to the field of communications technologies, and in particular, relate to a multimode broadband carrier power line communication system.
Background
At present, in implementation, construction and related research of a power communication access network of a smart power grid in China, a single transmission communication medium such as optical fiber, HPLC, broadband wireless and micropower wireless is mainly adopted, and system research on fusion of various media and communication chip technology of the media is lacked. At present, the mainstream power access communication mode in China is HPLC, and the technology utilizes a broadband OFDM technology, does not need to additionally lay a special communication line, and can utilize the existing distribution line for transmission, so that the unified management is facilitated, and the investment and construction cost is low; HPLC has disadvantages in that it is generally susceptible to additive and multiplicative interference, nonlinear distortion and channel cross modulation, and it is not easy to pass through a blocking point such as a substation, and most seriously, channel communication is immediately interrupted once a line is damaged. For the problems existing in the HPLC, a general domestic method is to use micro-power wireless for compensation and communication, that is, when an HPLC network cannot communicate, a micro-power wireless ad hoc network mode is used for supplementing communication.
Disclosure of Invention
An object of the embodiment of the application is to provide a multimode broadband carrier power line communication system, which integrates broadband power carrier, micropower wireless and bluetooth communication functions, can realize a 'four-in-one' centralized meter reading function, and supports the access of a sensing network node of the power internet of things to realize multichannel and multimode data transmission. In addition, the chip can support various modulation and demodulation modes, support various networking modes, and meet most of application scenes of the Internet of things, so that the problems in the background art are solved.
In order to solve the above technical problem, a technical solution of the multimode broadband carrier power line communication system provided in an embodiment of the present application is as follows:
the embodiment of the application discloses multimode broadband carrier power line communication system, communication system includes:
a carrier circuit;
the multimode power communication terminal is electrically connected with the carrier circuit and is used for providing a wireless local area network;
the power consumption adjusting module is electrically connected with the carrier circuit and used for adjusting the power consumption of the carrier circuit;
the integrated circuit module is used for being connected with the multimode power communication terminal and the power consumption adjusting module through the carrier circuit;
a processor electrically connected to the integrated circuit module.
In an embodiment of any of the foregoing schemes, the multimode power communication terminal further includes:
and sending beacon frames in a time-sharing manner on two channels of an OFDM technology and a radio frequency technology, and selecting a power line carrier channel or a wireless channel by the multimode power communication terminal to carry out networking, wherein the multimode power communication terminal records the module types and access channel modes of all network access nodes.
In an embodiment preferred in any of the above schemes, the multimode power communication terminal is configured to provide access to a wireless local area network for a data monitoring terminal device, and the multimode power communication terminal is further configured to provide WiFi communication resources for the data monitoring terminal and establish connection with the data monitoring terminal; and the connection with the control center is established through the 3G/4G communication resource channel, so that the receiving and sending of the IP service data between the local area network and the wide area network are realized.
In an embodiment of any of the foregoing schemes, the adjusting power consumption of the carrier circuit specifically includes the following:
the low-power-consumption working mode of the carrier circuit is used for receiving the low-power-consumption working mode of the carrier circuit, and the carrier circuit is awakened at regular time;
the time-sharing working mode of the carrier circuit and the radio frequency technology circuit enables the carrier circuit and the radio frequency technology to work in different time slots under the time-sharing working mode of the carrier circuit and the radio frequency technology circuit and when hardware is matched with an algorithm;
improving a networking mode, automatically detecting the current communication environment in the subnets, adopting a single mode, and adopting a dual mode between the subnets;
in a preferred embodiment of any of the above aspects, the integrated circuit module includes:
designing FPGA software, MCU software and a user operation interface;
the user operation interface design provides an upper computer and a touch screen interface for a user, is used for receiving a test operation instruction of the user to the novel digital micromirror chip and transmits the test operation instruction to the auxiliary controller;
the MCU software is designed for instruction analysis, module communication and system control, the instruction analysis module receives an operation instruction from a user, and transmits the analyzed information to other three modules for different test operations.
Compared with the prior art, the multimode broadband carrier power line communication system integrates broadband power carrier, micropower wireless and Bluetooth communication functions, can realize a four-in-one meter reading function, and supports the power internet of things sensing network node to access to realize multichannel multimode data transmission. In addition, the chip can support various modulation and demodulation modes, support various networking modes and meet most of application scenes of the Internet of things.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. Some specific embodiments of the present application will be described in detail hereinafter by way of illustration and not limitation with reference to the accompanying drawings. The same reference numbers will be used throughout the drawings to refer to the same or like parts or components, it being understood by those skilled in the art that the drawings are not necessarily drawn to scale and wherein:
fig. 1 is a schematic flowchart of a multimode broadband carrier power line communication system according to an embodiment of the present application.
Detailed Description
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It should be apparent that the described embodiments are merely one example of a component of the present application and not an all component embodiment. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Examples
As shown in fig. 1, an embodiment of the present application provides a multimode broadband carrier power line communication system, where the communication system includes:
a carrier circuit;
the multimode power communication terminal is electrically connected with the carrier circuit and is used for providing a wireless local area network; the multimode power communication terminal further comprises: sending beacon frames in a time-sharing manner on two channels of an OFDM technology and a radio frequency technology, and selecting a power line carrier channel or a wireless channel by a multimode electric power communication terminal for networking, wherein the multimode electric power communication terminal records the module types and access channel modes of all network access nodes; the multi-mode power communication terminal is used for providing access of a wireless local area network for the data monitoring terminal equipment, providing WiFi communication resources for the data monitoring terminal and establishing connection with the data monitoring terminal; the IP business data is transmitted and received between the local area network and the wide area network by establishing connection with the control center through the 3G/4G communication resource channel;
the power consumption adjusting module is electrically connected with the carrier circuit and used for adjusting the power consumption of the carrier circuit;
the integrated circuit module is used for being connected with the multimode power communication terminal and the power consumption adjusting module through the carrier circuit; the integrated circuit module includes: designing FPGA software, MCU software and a user operation interface; the user operation interface design provides an upper computer and a touch screen interface for a user, is used for receiving a test operation instruction of the user to the novel digital micromirror chip and transmits the test operation instruction to the auxiliary controller;
the MCU software is designed for instruction analysis, module communication and system control, the instruction analysis module receives an operation instruction from a user, and transmits the analyzed information to other three modules for different test operations
The processor is electrically connected with the integrated circuit module, and is used for adjusting the power consumption of the carrier circuit, and the processor specifically comprises the following contents:
the carrier circuit is in a low-power-consumption working mode, and the carrier circuit is awakened at regular time when the carrier circuit is received in the low-power-consumption working mode;
the time-sharing working mode of the carrier circuit and the radio frequency technology circuit enables the carrier circuit and the radio frequency technology to work in different time slots under the time-sharing working mode of the carrier circuit and the radio frequency technology circuit and when hardware is matched with an algorithm;
the networking mode is improved, the current communication environment is automatically detected in the interior of the sub-networks, a single-mode is adopted, and a double-mode is adopted among the sub-networks.
In the multimode broadband carrier power line communication system according to the embodiment of the invention, the communication module for power line meter reading has strict requirements on power consumption, and in the requirement document of national grid electric academy, static power consumption is not more than 250mW and dynamic power consumption is not more than 1.5W for a single-phase module. In a general carrier mode, especially in an OFDM mode, static power consumption of an existing chip is generally large. If additional RF circuitry is added, the static power consumption requirements are difficult to meet. In the aspect of dynamic power consumption, as the carrier signal is transmitted to the power line as much as possible, the power capacity provided by the electric energy meter is basically fully utilized, and if a radio frequency part is added, the power supply of the power supply is easy to catch the elbow. In practice, the following measures are generally adopted to reduce the power consumption of the dual-mode module:
(1) Low power consumption working mode of carrier circuit
And the carrier circuit is awakened at regular time under the receiving of the low-power-consumption working mode of the carrier circuit, so that the static power consumption of the module can be effectively reduced.
(2) Time sharing mode of operation for carrier and RF circuits
Under the time-sharing working mode of the carrier and the RF circuit and the coordination of hardware in an algorithm, the carrier and the RF are enabled to work in different time slots, thereby reducing the dynamic power consumption of the module.
(3) Improved networking mode
The current communication environment is automatically detected in the interior of the sub-networks, a proper single-mode is adopted, and a flexible double-mode is adopted among the sub-networks, so that the dynamic power consumption is reduced, and the networking efficiency is improved.
In the multi-mode broadband carrier power line communication system described in the embodiment of the present invention, at present, there are two types of mainstream FPGA test methods, one is a BIST-based functional test, and the other is an ATE-based functional test, and both have advantages suitable for large-batch and streamlined tests compared with ATE. The mainstream automatic test equipment in the chip test industry is a J750 series and an UltraFLEX test machine produced by Thoreda corporation, and the two test machines are integrated with functions of a high-precision power supply, a metering instrument, a signal generator, a pattern generator and the like. Two kinds of FPGA test equipment J750Ex and UltraFLEX used by a practice unit currently meet the FPGA chip test requirements in the aspects of the number of test channels (channels), the vector storage depth of a mode generator and the like, but the maximum data rate supported by a J750Ex test machine is only 400bps, namely the maximum data clock frequency is 200MHz. In order to meet the requirement of the XC4VSX55 type FPGA chip on the maximum clock frequency of 400MHz, an UltraFLEX test machine with the data rate of 800Mbps is adopted to build a test platform.
FPGA (field programmable Gate array) overall framework
The software design of the system is mainly divided into three parts, namely FPGA software design, MCU software design and user operation interface design.
The user operation interface provides an upper computer and a touch screen interface for a user, is used for receiving a test operation instruction of the user to the novel digital micromirror chip, and transmits the test operation instruction to the auxiliary controller. The MCU software is responsible for instruction analysis, module communication and system control. The instruction analysis module receives an operation instruction from a user and transmits the analyzed information to other three modules to carry out different test operations; the video processor control module realizes the control of the SiI 9616; the chip internal temperature testing module directly tests the temperature of the novel digital micromirror chip; and the data interconnection Module (MCU) transmits the test information transmitted by the user operation interface to the core processor.
In the multimode broadband carrier power line communication system provided by the embodiment of the invention, the FPGA software is responsible for carrying out function test on the novel digital micromirror chip and realizing the transmission of test data. And the data interconnection module (FPGA) judges the type of the test instruction from the MCU, transmits the test information to the corresponding chip function test module as required, and controls the novel digital micromirror drive module to realize the function test of the chip. The core processor transmits the data obtained by the test back to the MCU, and the MCU transmits the data to the operation interface for data display after receiving the transmitted data, so that the automatic function test of the novel digital micromirror chip is completed.
In the multimode broadband carrier power line communication system according to the embodiment of the present invention, the hardware implementation structure of the FFT processor mainly includes an iteration structure and a pipeline structure. The pipeline structure is suitable for use scenes of high-speed real-time processing. At large numbers, the storage and computing resources are much more demanding than the iterative structure. For a wideband carrier communication system, the FFT size is 1024 points, the sampling rate is only 25MHz, the reception time of a single OFDM symbol is known to be not less than 40.96us, and the data rate is not high. While the system clock of the dedicated chip can be designed to be 4 times or more higher than the sampling rate. Therefore, the iterative structure with a relatively small area can meet the processing time delay requirement of the system, and real-time processing is realized. An effective 2-butterfly parallel iteration architecture, a low-delay shared memory structure can simultaneously realize external data input and reading and writing of a computing unit or simultaneously support result output and reading and writing of the computing unit. The two butterfly computing units compute in parallel. The block floating point unit is responsible for improving the dynamic range of the FFT processing at a finite word length. The control unit coordinates the FFT iterative computation process, memory scheduling, and control twiddle factor generation.
In the multimode broadband carrier power line communication system according to the embodiment of the present invention, data time division diversity transceiving is applied: an OFDM wireless + HPLC broadband carrier power line; the CCO sends beacon frames in a time-sharing mode on an HPLC (high performance liquid chromatography) channel and an RF (radio frequency) channel, and the CCO and STA (station) nodes select power line carrier channels or wireless channels according to parameter indexes such as comprehensive field intensity, signal-to-noise ratio and the like and algorithms thereof. When the networking is not completed, in order to help nodes which are not networked to access the network, the CCO node and the STA node both send and forward beacon frames on an HPLC + RF double channel. The CCO records the module types and access channel modes of all network access nodes, so that it is convenient to select the correct channel when subsequently sending other messages, and the PCO only records the module types and access channels of each sub-node of the node. After networking is finished, beacon sending channels of the CCO and the STA are determined by the link types of the node and the direct connection sub-nodes, and are not uniformly arranged by the CCO. All STAs (smart meter/I type collector communication unit, high speed carrier II type collector) are connected with the CCO as a center and PCOs (smart meter/I type collector communication unit, high speed carrier II type collector) as relay agents.
In the multimode broadband carrier power line communication system according to the embodiment of the present invention, the packet drop rate is improved by diversity communication: due to excellent transmission performance on broadband wireless and a strong physical layer protocol of HPLC, the extremely low packet drop rate of wireless communication is ensured; the diversity communication networking improves the number of neighbor nodes: the increased neighbor nodes shorten the routing path, reduce the system network overhead and improve the system efficiency and the communication network stability; the blind spot node probability is greatly reduced. The multimode system can greatly improve the performance and efficiency of the communication network and meet the requirement of new service of the electricity utilization information acquisition system on the continuous development of the communication network.
In the multimode broadband carrier power line communication system according to the embodiment of the present invention, in a non-transmission state, the multimode AFE periodically performs interference signal detection processing. The multi-mode AFE transforms the received signal to a frequency domain through FFT, and detects whether a large narrow-band interference signal exists in a wired frequency band used by the current wireless communication or not based on a threshold judgment mode. After the detection result is written into the register, an interrupt is sent to the HPLC. The HPLC may read the interference detection result based on an interrupt, or may periodically check the interference detection result status register in a polling (polling) manner. And the HPLC determines whether to carry out carrier avoidance processing according to the interference detection result reported by the multimode AFE.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments can be modified, or technical features of components or all components thereof can be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.
Claims (5)
1. A multi-mode broadband carrier power line communication system, the communication system comprising:
a carrier circuit;
the multimode power communication terminal is electrically connected with the carrier circuit and is used for providing a wireless local area network;
the power consumption adjusting module is electrically connected with the carrier circuit and used for adjusting the power consumption of the carrier circuit;
the integrated circuit module is used for being connected with the multimode electric power communication terminal and the power consumption adjusting module through the carrier circuit;
a processor for electrical connection with the integrated circuit module.
2. The multimode broadband carrier power line communication system of claim 1, wherein the multimode power communication terminal further comprises:
and sending beacon frames in a time-sharing manner on two channels of an OFDM technology and a radio frequency technology, and selecting a power line carrier channel or a wireless channel by the multimode power communication terminal for networking, wherein the multimode power communication terminal records the module types and access channel modes of all network access nodes.
3. The system according to claim 1 or 2, wherein the multimode power communication terminal is configured to provide access to a wireless local area network for a data monitoring terminal device, and the multimode power communication terminal is further configured to provide WiFi communication resources for the data monitoring terminal device, and establish a connection with the data monitoring terminal device; and the connection with the control center is established through the 3G/4G communication resource channel, so that the receiving and sending of the IP service data between the local area network and the wide area network are realized.
4. The system according to claim 3, wherein the adjusting the power consumption of the carrier circuit specifically comprises:
the low-power-consumption working mode of the carrier circuit is used for receiving the low-power-consumption working mode of the carrier circuit, and the carrier circuit is awakened at regular time;
the time-sharing working mode of the carrier circuit and the radio frequency technology circuit enables the carrier circuit and the radio frequency technology to work in different time slots under the time-sharing working mode of the carrier circuit and the radio frequency technology circuit and the matching of hardware in an algorithm;
the networking mode is improved, the current communication environment is automatically detected in the subnets, a single mode is adopted, and a dual mode is adopted among the subnets.
5. The system according to claim 4, wherein said integrated circuit module comprises:
designing FPGA software, MCU software and a user operation interface;
the user operation interface design is used for providing an upper computer and a touch screen interface for a user, receiving a test operation instruction of the user to the novel digital micromirror chip and transmitting the test operation instruction to the auxiliary controller;
the MCU software design is used for instruction analysis, module communication and system control, and the instruction analysis module receives an operation instruction from a user and transmits the analyzed information to other three modules to carry out different test operations.
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| CN202210920713.4A CN115297379A (en) | 2022-08-02 | 2022-08-02 | Multimode broadband carrier power line communication system |
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| CN202210920713.4A CN115297379A (en) | 2022-08-02 | 2022-08-02 | Multimode broadband carrier power line communication system |
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