CN116527572A - Multipath data transmission system based on 5G - Google Patents
Multipath data transmission system based on 5G Download PDFInfo
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- CN116527572A CN116527572A CN202310445715.7A CN202310445715A CN116527572A CN 116527572 A CN116527572 A CN 116527572A CN 202310445715 A CN202310445715 A CN 202310445715A CN 116527572 A CN116527572 A CN 116527572A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/24—Multipath
- H04L45/245—Link aggregation, e.g. trunking
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W40/00—Communication routing or communication path finding
- H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04W76/00—Connection management
- H04W76/10—Connection setup
- H04W76/15—Setup of multiple wireless link connections
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
- H04L43/08—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
- H04L43/0876—Network utilisation, e.g. volume of load or congestion level
- H04L43/0888—Throughput
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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Abstract
The invention discloses a multipath data transmission system based on 5G, which comprises: and the main control module: as the core of the whole system, controlling the operation of the system; 5G module: carrying at least two 5G modules, communicating with a main control module, and aggregating two 5G links through a multipath transmission control protocol to realize the transmission of 5G multipath data; and a data interaction module: forming a local area network with external equipment, and communicating with a main control module to realize data acquisition; and the man-machine interaction module is used for: and the system is communicated with the main control module to realize control and communication of the system. The invention realizes the fusion of MPTCP and 5G technologies, successfully aggregates the 5G communication links of different operators, and solves the problems that the existing 5G network has poor coverage performance, limited uplink rate and uneven base station distribution, and cannot meet the ever-increasing high-speed communication and application requirements based on the Internet of things.
Description
Technical Field
The invention belongs to the technical field of communication, relates to an embedded data transmission system for aggregating 5G links of different operators, and particularly relates to a 5G-based multipath data transmission system.
Background
The development of technologies such as the Internet of things, artificial intelligence and big data at present promotes the progress of digitization, networking and intellectualization of each industry, which leads to the rapid increase of data traffic in the Internet field, and the requirements of each industry on data transmission are continuously improved. Therefore, the fifth generation mobile communication technology with higher transmission bandwidth, lower transmission delay and mass equipment connection is the driving force of new technological revolution and industry revolution worldwide. However, the coverage performance of the 5G network is poor, the uplink rate is limited, and the base stations are unevenly distributed. In order to accelerate the 5G fusion industry and realize the strategic goal of enabling industry and department, the enhancement of the communication performance of 5G becomes a problem and a research hotspot which need to be solved by researchers at home and abroad.
The current proposals for 5G enhancement techniques are largely divided into two aspects. On one hand, the 5G key technology is researched and improved, including technologies such as 5G antenna bandwidth enhancement, large-scale MIMO enhancement, control channel enhancement and the like, but the technical schemes have difficulty in popularization and implementation and higher improvement cost; on the other hand, the 4G technology with good coverage performance at present is used for making up the defect of 5G NR, and although the transmission performance of 5G is improved on the network coverage at the uplink speed, the problem of end-to-network adaptation can seriously influence the experience effect of users.
The multipath data transmission control protocol (MPTCP) is a parallel multipath transmission scheme based on TCP, which is developed and formulated by the Internet engineering task force, has good compatibility with a TCP/IP network architecture, can establish a plurality of transmission paths and aggregate a plurality of network bandwidths; the transmission paths are mutually backed up, so that the fault tolerance of the network is improved; and supporting mobility, and meeting seamless switching among paths of a user in the moving process. Therefore, a scheme of combining the MPTCP technology and the 5G technology is provided, a 5G multipath data transmission system platform is designed according to the scheme, 5G communication links of different operators are aggregated, the limitation of the 5G enhancement technology is overcome, and the problem that the existing 5G network cannot meet the application requirements of high-speed communication and the Internet of things due to poor coverage performance, limited uplink speed and uneven base station distribution is solved.
Disclosure of Invention
In order to solve the problems in the background technology, the invention combines the MPTCP protocol with the 5G technology, aggregates the 5G communication links of different operators to improve the transmission bandwidth, the connection robustness and the network service quality of the 5G in the industrial application, and provides a multipath data transmission system based on the 5G.
The invention adopts the following technical scheme:
a 5G-based multipath data transmission system comprising the following modules:
and the main control module: as the core of the whole system, controlling the operation of the system;
5G module: carrying at least two 5G modules, communicating with a main control module, and aggregating two 5G links through a multipath transmission control protocol to realize the transmission of 5G multipath data;
and a data interaction module: forming a local area network with external equipment, and communicating with a main control module to realize data acquisition;
and the man-machine interaction module is used for: and the system is communicated with the main control module to realize control and communication of the system.
Preferably, the main control module is composed of NAND FLASH of the i.mx6ull carrying 512MB and DDR3, and DDR3 provides a memory space for the operation of the system, and NAND FLASH provides external memory expansion.
Preferably, the 5G module adopts an RM500Q-GL module, is connected with a USB2.0 controller of the I.MX6ULL processor, USB transmission lines USB_N and USB_P belong to differential data lines, signal integrity analysis and impedance matching are carried out on circuit wiring of the USB transmission lines, PWR_OFF and RESET are respectively on-OFF and RESET pins of the 5G module, and are connected with GPIO output control.
Preferably, the data interaction module adopts Ethernet and Wi-Fi equipment to form a local area network, and an I.MX6ULL internal integrated MAC controller is used for processing TCP/IP protocol and supporting RMII interface.
Preferably, the man-machine interaction module is connected with RGBLCD equipment by adopting eLCDIF, and the USB serial port converts the two-wire serial signal into a USB differential signal through a CH340C chip.
Preferably, the system further comprises a power management and conversion module for providing power for the system.
In the preferred technical scheme of the invention, the data acquired by the local area network are aggregated by utilizing the MPTCP protocol and sent to the cloud end, the platform hardware is divided into a core board and a bottom board, wherein the core board takes an I.MX6ULL processor as a core and is provided with a 512MB DDR3 memory module and a 512MB Nand Flash memory module; the base plate is connected with the 5G communication module RM500Q-GL by adopting a USB2.0 interface; the local area network is respectively connected with PHYs to form an Ethernet by using RMII interfaces, and the SDIO interfaces are connected with Wi-Fi modules; the USB to serial port is used as a platform terminal, and the LCD is used as a system application interface display device; the processor MMD interface is connected with the SD card.
Preferably, the software part of the design system of the invention is transplanted with U-boot, MPTCP_Linux0.95 and ubuntu-base to establish an operating environment conforming to the I.MX6ULL of the target processor, and the API interface and the driving framework of the Linux system are used for designing the device driving file and designing the visual display interface of the system.
Preferably, a script file is written to realize the route configuration of the multipath transmission.
Preferably, the driving and application interfaces are loaded into the kernel, and the transplanted U-boot, MPTCP_Linux0.95 and ubuntu-base files are compiled to obtain corresponding image files.
According to the preferable technical scheme, the software is a migration U-boot, MPTCP-Linux0.95 and ubuntu-base, and a bootstrap program, a kernel and a root file system which accord with a target platform are compiled; writing equipment tree information according to the board-level hardware information; and finishing the device driving of the 5G module, the Ethernet, the Wi-Fi, the USB serial port and the LCD, and developing a system application interface. And finally, packaging and downloading all software designs to a system platform, and using two 5G links to perform data transmission so as to complete functional verification and performance test of the system.
Preferably, the SD card is divided into three main partitions, which store a boot program, a kernel image, a device tree file, and a root file system, respectively.
Preferably, the system starting mode is set as SD card starting, the 5G module is dialed to access the Internet, the IP addresses of the Ethernet and Wi-Fi equipment are automatically configured through the router, and the routing configuration script of the multipath transmission of the system is operated.
Preferably, an experimental test environment is built, data transmission is performed on a system platform by using two 5G links, the function of the system is verified, and throughput performance of dual-path and single-path data transmission of the system is tested.
The invention realizes the fusion of MPTCP and 5G technologies, successfully aggregates the 5G communication links of different operators, and solves the problems that the existing 5G network has poor coverage performance, limited uplink rate and uneven base station distribution, and cannot meet the ever-increasing high-speed communication and application requirements based on the Internet of things.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a topology structure diagram of a 5G-based multipath data transmission system according to the present invention.
Fig. 2 is a schematic diagram of the principle of the multipath transmission protocol.
Fig. 3 is a hardware configuration diagram of a 5G-based multipath data transmission system.
Fig. 4 is a hardware configuration diagram of the 5G module.
Fig. 5 is a schematic diagram of a system power topology.
Fig. 6 is a software structural diagram of a 5G-based multipath data transmission system.
Fig. 7 is a system device driver call structure diagram.
Fig. 8 is a schematic diagram of a USB drive configuration.
Detailed Description
The invention is further described below with reference to the drawings and examples.
As shown in fig. 1, the overall framework of the system of the present invention includes four parts, namely a main control module, a 5G module, a data interaction module and a man-machine interaction module, in a preferred embodiment, the main control module uses an i.mx6ull chip of an ARM Cortex-A7 kernel as a main controller to control the operation of the whole system, and complete the receiving and sending of data; the 5G module is main equipment for realizing remote data transmission, two 5G modules are mounted in the embodiment, and two 5G links are aggregated through a multipath transmission control protocol to realize the transmission of 5G multipath data; the data interaction module forms a local area network with external equipment in an Ethernet and Wi-Fi mode, so that data acquisition is realized; the man-machine interaction module uses a USB serial port and LCD equipment to realize control and communication with a system.
As shown in fig. 2, the working principle of MPTCP (Multipath TCP) in a preferred embodiment of the present invention is schematically shown. The MPTCP divides the transport layer into an application-oriented "semantic layer" and a network-oriented "flow and endpoint layer", and according to the goals and roles of MPTCP, it is divided into four main functional modules of packet scheduling, congestion control, path management, and sub-flow interface. The packet scheduling module receives the data stream from the upper layer, performs operations such as data segmentation and sequence number addition, and then selects an available path to allocate the data packet. The congestion control module keeps the network flow balanced by controlling the flow in the transmission process, and prevents congestion. The path management module is responsible for finding out a plurality of paths connected between two hosts and managing a plurality of substreams through a substream interface. The functional modules cooperate with each other to complete data transceiving of a plurality of links.
As shown in fig. 3, a hardware configuration diagram of a 5G-based multipath data transmission system according to a preferred embodiment of the present invention. The main control module mainly comprises NAND FLASH of an I.MX6ULL carrying 512MB and DDR3, the DDR3 provides a memory space for the operation of the system, NAND FLASH provides external storage expansion, and saves the mirror image and the operation data of the system.
The data interaction module forms a local area network by using Ethernet and Wi-Fi equipment, an I.MX6ULL internally integrates an MAC controller, can process protocols such as TCP/IP and the like and supports an RMII (reduced media independent) interface, so that the RMII interface is used for connecting two PHY chips to form a wired Ethernet circuit, and an MDIO (management data input output) bus is used for accessing all registers of the PHY chips; wiFi provides SDIO (secure digital input output) interfacing using a USDHC (ultra secure digital host) controller.
The man-machine interaction module uses eLCDIF (enhanced LCD interface) to connect RGBLCD equipment; the USB serial port needs to use a CH340C chip to convert the two-wire serial signal into a USB differential signal.
The 5G module is connected with a USB2.0 controller of the I.MX6ULL processor by using an RM500Q-GL module, as shown in FIG. 4, USB transmission lines USB_N and USB_P belong to differential data lines, signal integrity analysis and impedance matching are carried out on circuit wires of the USB transmission lines, PWR_OFF and RESET are respectively the on-OFF pin and the RESET pin of the 5G module, and the USB transmission lines are connected with GPIO output control. The 5G module is provided with two SIM card interfaces, CLK is a clock signal, IO is a data input/output port, and CD is SIM card insertion detection.
In addition, in this embodiment, the system further relates to a power management and conversion module, the topology structure of which is shown in fig. 5, and the input voltage 12V is converted into direct current 5V, 3.8V and 3.3V after passing through the filtering voltage stabilizing circuit and the Buck circuit, and the direct current 5V, 3.8V and 3.3V are input into the filtering processing to supply power to the core control board. The power-on time sequence and the power-off time sequence of the processor have strict requirements, the power-on time sequence is that VDD_SNVS_IN must be powered on singly or together with VDD_HIGH_IN IN a short-circuit mode, namely, core board power supply is firstly (1) SNVS (safe nonvolatile storage) power-on, then a request signal output by SNVS is used for enabling a power supply (2) to supply power for CPU internal hardware and DCDC_3.3V, and finally, a core board GPIO (general purpose input/output) control power supply (3) is used for supplying power for bottom board equipment; the power down sequence is that other power supplies must all complete power down before (1) powering down.
In the preferred embodiment of the invention, the software is also related, the software structure of the 5G-based multipath data transmission system is shown in fig. 6, wherein the software structure comprises a system environment and a device driver, and the running environment of the system is constructed by transplanting a U-boot bootstrap program and an MPTCP_Linux0.95 version kernel; the device driver is a hardware information driver program at the level of a conforming board according to the peripheral devices of the system, including devices such as a 5G module, ethernet, wi-Fi, LCD and the like. The application layer uses the Qt to design a display interface, collects the running state information of the system through the API interface of the system, and displays the running state information on the LCD device.
And adding the electrical attribute of the hardware equipment, configuring configuration information conforming to I.MX6ULL, changing a cross compiler, and compiling the U-boot file to generate U-boot. Bin and U-boot. Img.
And according to the configuration information of the electrical attribute and the function of the device added by the hardware in the device tree, writing a device driver by using a Linux driving architecture, selecting and eliminating a functional module of a Linux kernel, and compiling the kernel to obtain zImage and dtb files.
Transplanting ubuntu-base, installing required functional modules, such as FTP, SSH, vim, kmod, etc., and then packaging the files into compressed files ubuntu-base.
The system supports the SD card starting mode and the Nand Flash starting mode, when the SD card is used for starting, the SD card is divided into three main partitions, a 'dd' command is used for programming a u-boot. Bin file into the main partition 1, zImage and a. Dtb file are copied into the main partition 2, ubuntu-base. Tar is copied into the main partition 3, and decompression is carried out.
Device driver of this embodiment as shown in fig. 7, linux provides a corresponding driving architecture for devices with different functions, so that corresponding functions in the structure body need to be implemented. Firstly, calling an entry function of a driver, applying for a device number, registering the device number applied by the device into a kernel to generate a corresponding device node, and determining whether to respond to the driver or not by the system through the name of the driver and the name of the device of a device tree.
The character equipment is equipment for performing read-write operation according to byte stream, the system comprises LCD, UART, GPIO pin control and the like, and the access of the character equipment can be directly performed through a virtual file system.
The block device is a random storage device with a certain structure, the read-write of the device is performed in a block unit, the system comprises an SD card and a NAND Flash storage device, and the access to the device can only be performed through a Block File System (BFS).
Network devices are devices that transmit and receive data over a transmission medium through a network interface, and the system includes ethernet and Wi-Fi communication devices that use Socket to access.
The 5G module belongs to both block equipment and network equipment. The driving architecture is shown in fig. 8, the USB device driver uses the API provided by the USB Core to complete the driving work, and controls the communication between the USB device and the host controller through the pipe (pipe); the USB Core and a USB main controller driver (HCD) form a USB subsystem, so that the complexity of a USB protocol and hardware is hidden; the USB bus associates devices and drivers. The module binds and initializes the network interface of the usb device through the usbnet_probe function, registers the network interface card device to the upper layer, and completes the configuration of the usb network device.
The hardware connection mode of the multipath data transmission system based on 5G is as follows: connecting the system platform with a router and a PC to form a local area network by using a network cable; selecting SIM cards of China Mobile (CMCC) and China Telecom (CTC) to be inserted into the card slot, wherein the radio frequency front end of each 5G module is connected with 4 antennas; the system starting mode is set as SD card starting; and the USB serial port is connected to the PC end to realize the control of the system.
Use of a 5G-based multipath data transmission system: firstly powering on a system kernel, performing dial-up networking on a 5G module, opening network interfaces of an Ethernet and Wi-Fi equipment, connecting a router, acquiring an IP address distributed by the router, and running a routing configuration script for multipath transmission of the system.
The two 5G links and a single 5G link of the 5G-based multipath data transmission system platform are used for respectively transmitting file packets of 10 MB-150 MB, and throughput data is recorded, so that the 5G multipath data transmission system platform can realize bandwidth aggregation of the 5G links of different operators, and the transmission rate of the 5G multipath data transmission system platform is obviously improved compared with that of the single link.
In summary, in this embodiment, the Linux kernel embedded with the MPTCP protocol is transplanted to the architecture conforming to the i.mx6ull processor, the processor-integrated MMDC controller is used to connect the memory space of the DDR3 expansion system of 512MB, the EMI interface is connected to the Nand Flash expansion memory space of 512MB, the USB2.0 interface is carried with two 5G modules to complete the transmission of 5G multipath data, the RMII interface is connected to the PHY chip to form an ethernet interface, the processor-integrated USDHC controller is connected to the wireless Wi-Fi module and the SD card through the SDIO interface, the CH340C chip changes the two-wire serial signal into a USB serial interface, and the ehcdif interface is connected to the LCD display device.
The invention discloses a multipath data transmission system based on 5G, which utilizes a multipath data transmission protocol (MPTCP) to aggregate 5G communication links of different operators, thereby effectively improving the transmission bandwidth, the connection robustness and the network service quality of 5G in industrial application. The preferred embodiment of the invention mainly comprises a core board which takes an I.MX6ULL processor as a core and is provided with a DDR3 memory module of 512MB, a Nand Flash storage module of 512MB, and an external interface and a circuit module of a 5G communication module, an Ethernet, wi-Fi, a USB serial port, an LCD display, a power supply and the like. The specific operation steps are as follows: designing a schematic diagram and a PCB circuit of a 5G multipath data transmission system; establishing an operating environment conforming to a target processor I.MX6ULL; completing a visual display interface of the equipment tree, the driver and the system; and writing a script file to realize the route configuration of multipath transmission. The invention can use MPTCP protocol to transmit data through two 5G communication links, and the transmission rate is obviously improved compared with a single link, can achieve the link aggregation effect of the established target, and has higher practical value.
Claims (9)
1. The multipath data transmission system based on 5G is characterized by comprising the following modules:
and the main control module: controlling the operation of the whole system;
5G module: carrying at least two 5G modules, communicating with a main control module, and aggregating a plurality of 5G links through a multi-path transmission control protocol to realize the transmission of 5G multi-path data;
and a data interaction module: forming a local area network with external equipment, and communicating with a main control module to realize data acquisition;
and the man-machine interaction module is used for: and the system is communicated with the main control module to realize control and communication of the system.
2. The 5G-based multipath data transmission system as claimed in claim 1, wherein: the main control module consists of NAND FLASH of an I.MX6ULL carrying 512MB and DDR3, wherein the DDR3 provides a memory space for the operation of the system and external storage expansion is provided for NAND FLASH.
3. The 5G-based multipath data transmission system as claimed in claim 2, wherein: the 5G module adopts an RM500Q-GL module, is connected with a USB2.0 controller of the I.MX6ULL processor, and USB transmission lines USB_N and USB_P belong to differential data lines, carry out signal integrity analysis and impedance matching on circuit wiring of the differential data lines, and PWR_OFF and RESET are respectively the on-OFF pin and the RESET pin of the 5G module and are connected with GPIO output control.
4. A 5G based multipath data transmission system as claimed in claim 3 wherein: the data interaction module adopts Ethernet and Wi-Fi equipment to form a local area network, and an I.MX6ULL internal integrated MAC controller is used for processing TCP/IP protocol and supporting RMII interface.
5. The 5G-based multipath data transmission system as claimed in claim 4, wherein: the man-machine interaction module is connected with RGBLCD equipment by adopting eLCDIF, and the USB serial port converts two-line serial signals into USB differential signals through a CH340C chip.
6. A 5G-based multipath data transmission system as claimed in any of claims 1 to 5, wherein: the system also comprises a power management and conversion module for providing power for the system.
7. The 5G-based multipath data transmission system as claimed in claim 5, wherein: the main control module is transplanted with U-boot, MPTCP_Linux0.95 and ubuntu-base to establish an operating environment which accords with the I.MX6ULL of the target processor, and the API interface and the driving framework of the Linux system are used for designing a driving file and designing a visual display interface of the system.
8. The 5G-based multipath data transmission system as claimed in claim 6, wherein: and the master control module writes a script file to realize the route configuration of multipath transmission.
9. The 5G-based multipath data transmission system as claimed in claim 7, wherein: in the main control module, a driving and application interface is loaded into a kernel, and transplanted U-boot, MPTCP_Linux0.95 and ubuntu-base files are compiled to obtain corresponding mirror image files.
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| CN118092811A (en) * | 2024-04-18 | 2024-05-28 | 中核武汉核电运行技术股份有限公司 | Safety configuration method for collecting and writing multiple data sources |
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| CN118092811A (en) * | 2024-04-18 | 2024-05-28 | 中核武汉核电运行技术股份有限公司 | Safety configuration method for collecting and writing multiple data sources |
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