CN109413613A - A kind of car networking wireless multi-mode gateway system - Google Patents
A kind of car networking wireless multi-mode gateway system Download PDFInfo
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- CN109413613A CN109413613A CN201811357330.0A CN201811357330A CN109413613A CN 109413613 A CN109413613 A CN 109413613A CN 201811357330 A CN201811357330 A CN 201811357330A CN 109413613 A CN109413613 A CN 109413613A
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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
- H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
-
- 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
- H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
- H04W4/42—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P] for mass transport vehicles, e.g. buses, trains or aircraft
-
- 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
- H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
- H04W4/44—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P] for communication between vehicles and infrastructures, e.g. vehicle-to-cloud [V2C] or vehicle-to-home [V2H]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
- H04W84/10—Small scale networks; Flat hierarchical networks
- H04W84/12—WLAN [Wireless Local Area Networks]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/08—Access point devices
- H04W88/10—Access point devices adapted for operation in multiple networks, e.g. multi-mode access points
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/16—Gateway arrangements
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Aviation & Aerospace Engineering (AREA)
- Small-Scale Networks (AREA)
Abstract
The invention discloses a kind of car networking wireless multi-mode gateway systems, it includes terminal access section, network insertion portion and gateway control portion, wherein, network insertion portion may make interior equipment wirelessly access gateway, to realize communicating with each other for in-vehicle device, and network interface portion may make that gateway accesses different external networks as terminal, and gateway control portion then can control the communication realized between in-vehicle device and external network.Terminal access section in the present invention uses IEEE802.11g wireless interface module.Network interface portion includes 3G module and IEEE802.11g wireless interface module.The problem of wireless multi-mode gateway system in the present invention by setting up vehicle interior WLAN, and provides external network access function for the in-vehicle device in WLAN, and the wireless device network for being able to solve vehicle interior is shared and accesses external network.
Description
Technical field
The present invention relates to a kind of car networking wireless multi-mode gateway systems.
Background technique
The great potential of Internet of Things development is widely applied scene from it.Up to the present, Internet of Things has been applied
In various industries fields such as smart grid, intelligent medical treatment, wisdom logistics, smart home and intelligent transportation.
Car networking is exactly technology of Internet of things in intelligent transportation system (ITS, Intelligent Transportation
System one of application in) is the specific implementation that Internet of Things is applied to intelligent transportation system.
Car networking is that one of the critical issue of intelligent transportation is solved on the basis of Internet of Things, and car networking is basic with vehicle
Information unit, by sensing technology, information acquiring technology, access technology, transmission technology, networking technology, by pedestrian, vehicle, road
The roads such as side facility entity is connect with traffic management network, mobile network and backup network；Serve vehicle safety, traffic control
The applications such as system, information service, user network access；Final goal is to realize integral intelligent railway and highway system and ubiquitous
Network.
Vehicle driving is typical case of the car networking in terms of improving driving safety on a highway, if public in high speed
Car networking is realized in road, the information of vehicles of front and back and adjacent lane can by board unit on vehicle (On-Board Unit,
OBU) communication obtains, once emergency occurs in nearby vehicle, driver can avoid in time according to prompt, effectively reduces accident
Generation；And by using the roadside unit (Road-Side Unit, RSU) for being mounted on roadside, traffic control department can utilize
On the one hand RSU collects the more detailed operating condition of vehicle in real time, the level of IT application of road management is improved, on the other hand by road
Condition information and other multimedia service informations are notified to traveling in all vehicles in specified section in real time, and it is effective to improve information publication
Property.It can be said that there is vast potential for future development, be the following intelligent transportation using car networking as the broad sense intelligent transportation system of core
Developing direction；Simultaneously as the emphasis tackling key problem field specified in " National Program for Medium-to Long-term Scientific and Technological Development ", vehicle
The application of networking can be improved intelligent transportation system service level, promote urban informationization system Construction, to develop and building number
Zi Hua cyber city provides strong support.However in car networking system, the wireless device of vehicle interior needs to access external
Network realizes acquisition of information and transfer function, while the wireless device of vehicle interior is also required to directly or indirectly connect mutually,
Realize that vehicle internal information sharing functionality, this two-part function need to realize by the wireless multi-mode gateway of vehicle interior.
Therefore, car networking wireless multi-mode gateway system how is designed, is connect to provide broadband wireless for vehicle interior
Entering service has important practical value and realistic meaning for the development level for providing intelligent transportation system.
Summary of the invention
It is an object of the invention to propose a kind of car networking wireless multi-mode gateway system, to solve vehicle generally existing at present
The problem of internal wireless device network is shared and access external network.
The present invention to achieve the goals above, adopts the following technical scheme that
A kind of car networking wireless multi-mode gateway system, comprising:
Terminal access section is configurable for providing the access of WLAN；
Network interface portion is configurable for realizing gateway accessing to different external networks；And
Gateway control portion is configurable for realizing the communication between in-vehicle device and external network.
Preferably, the terminal access section uses IEEE802.11g wireless interface module.
Preferably, the network interface portion includes 3G module and IEEE802.11g wireless interface module.
Preferably, the gateway control portion includes a gateway controller；
Terminal access section and network inter-face portion do not pass through USB interface and are connected with gateway controller.
The present invention to achieve the goals above, adopts the following technical scheme that
Gateway system in the present invention, including terminal access section, network insertion portion and gateway control portion, wherein network
Access section may make interior equipment wirelessly access gateway, thus realize communicating with each other for in-vehicle device, and network
Interface portion may make that gateway accesses different external networks as terminal, and gateway control portion then can control realize in-vehicle device with
Communication between external network.The present invention is the car in WLAN by setting up vehicle interior WLAN
Equipment provides external network access function, and asking for external network is shared and accessed to the wireless device network for being able to solve vehicle interior
Topic.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of interior WLAN；
Fig. 2 is the structural schematic diagram of gateway accessing external network；
Fig. 3 is the schematic diagram of car networking wireless multi-mode gateway system in the present invention；
Fig. 4 is the hardware block diagram of car networking wireless multi-mode gateway system in the present invention；
Fig. 5 is usb bus topological structure schematic diagram；
Fig. 6 is the software Booting sequence figure of car networking wireless multi-mode gateway system in the present invention.
Specific embodiment
With reference to the accompanying drawing and specific embodiment invention is further described in detail:
The embodiment of the present invention has addressed a kind of car networking wireless multi-mode gateway system, which mainly realizes two-part function
Can:
1) access is provided for wireless terminal
An interior WLAN is constructed, so that interior equipment is wirelessly after access gateway, Ke Yishi
Existing in-vehicle device communicates with each other, and system structure is as shown in Figure 1.
2) wireless network access function
The terminal that wireless multi-mode gateway can be used as accesses different networks, such as 3G network and WLAN.
On this basis, when being linked into the in-vehicle device needs and external network communication of gateway, so that it may be selected by gateway
A suitable external network access is selected, system structure is as shown in Figure 2.
This comprehensive two-part function, the master-plan structure of available system are as shown in Figure 3.
A kind of car networking wireless multi-mode gateway system, including terminal access section, network interface portion and gateway control portion.Its
In:
Terminal access section, for providing the access function of WLAN；
Network interface portion, for realizing gateway accessing to different external networks；And
Gateway control portion is configurable for realizing the communication between in-vehicle device and external network.
Gateway control portion manages each network module and peripheral module, is the core of gateway in the embodiment of the present invention,
Application program and driver are run, realizes routing, data packet forwarding, the functions such as user configuration.
Gateway control portion in the present embodiment includes a gateway controller；
Terminal access section and network inter-face portion do not pass through USB interface and are connected with gateway controller.
As shown in figure 4, gateway controller is using the S3C6410 chip of ARM11 series as core processor, outside extension
256M RAM and 2GB MLC2Nand Flash, gateway controller have 3 USB Host interfaces, 1 mini USB interface,
3 serial ports, 1 SD card interface, 1 Ethernet interface and 1 LCD display with touch function.
Wherein, SD card interface is used for programming system, and LCD display is for showing gateway status and input information.
S3C6410 is that Samsung releases the 32-bit microprocessor based on ARM1176JZF-S core, it is intended to be mobile device
One high-performance, the application processor solution of low-power consumption are provided.The dominant frequency of S3C6410 reaches 667MHz, using in 32
Portion's bus structures are made of AXI, AHB and APB bus, are contained many effective hardware accelerators, can be completed to regard well
The functions such as frequency is handled, audio processing, 2D image procossing, and image shows and scales.
In order to save system cost and improve system performance, the built-in many hardware interfaces of S3C6410, such as camera are connect
Mouthful, TFT-24 true color LCD controllers, system controller (power control), 4 channel UART, 32 channel DMA have PWM defeated
5 channel, the 32 bit timing device of function out, general purpose I/O Interface, I2S bus interface, I2C bus interface, USB Host interface, USB
OTG equipment operation function, 3 channel SD/MMC master controllers and the PLL for generating clock signal.
Universal serial bus (USB, Universal Serial Bus) is a kind of string for connecting computer and peripheral equipment
Row communication standard, is widely used in computer and mobile device.Peripheral module is all to pass through USB interface in designed gateway
It is connected with controller.The most significant feature of USB is to support hot plug and plug and play, and gateway controller is added at any time
With deletion network module, the flexibility of gateway application is greatly improved.
Current newest USB standard is USB 3.0, and backward compatible, can be divided into Low Speed, Full by rate
The transmission rate of Speed, Hi-speed and Super Speed, Low Speed are 1.5Mbps, i.e. USB1.0 standard；Full
The transmission rate of Speed is 12Mbps, i.e. USB1.1 standard；The transmission rate of Hi-speed is 480Mbps, i.e. USB2.0 mark
It is quasi-；The transmission rate of Super Speed theoretically reaches 5Gbps, i.e., newest USB3.0 standard.There are two USB by S3C6410
Host interface can support Low Speed and Full Speed USB device simultaneously.Since the network module needs of periphery are more
USB interface, so gateway controller needs be extended on the basis of USB Host interface.
As shown in figure 5, usb bus structure mainly comprises the following steps: USB Host controller is responsible for processing host
The connection of physical layer and protocol layer between equipment is the control centre of USB system, passes through internal bus and processor phase
Even.USB Hub is used for the extension of USB system, and each USB Host controller includes a USB Hub, referred to as Root Hub,
USB Hub can connect USB device, can also meet USB Hub for further expanding.USB device, each USB device have
One unique address, by host assignment to equipment, Root Hub can with 127 USB devices of direct or indirect connection, and
And guarantee that the transmission of each USB device will not generate interference.
Gateway controller is extended USB Host controller using AU9245 chip, and AU9245 is a integrated list
Piece USB Hub controller, single AU9245 chip supports the extension of 4 tunnel standard USB interfaces, and each interface has power
Switch control and over-current detection.Gateway controller by the USB Host control unit interface XUHDP and XUHDN of S3C6410 and
The connection of AU9245 chip expands 3 road USB Host interfaces and uses for connecting peripheral equipment, 1 road USB Slave interface
MiniUSB interface is used for transmission data for connecting with PC machine.
Ethernet interface in gateway controller mainly has both sides function:
1. Ethernet interface can be used as one and the high speed of PC machine data exchange is logical in system and program development process
Road, to improve exploitation and debugging efficiency.Using Network File System (NFS, Network File System) realize PC machine and
Development board data sharing is transmitted using the data that FTP realizes PC machine to development board, will use Ethernet interface；
2. gateway controller can be connected in computer LAN by Ethernet interface, in the environment of having local area network
A kind of more modes for accessing Internet can provide faster and more cheap network connection for wireless device.
For system using DM9000 chip as ethernet controller, DM9000 is the Fast Ethernet of a integrated monolithic
Mac controller has adaptive 10/100M PHY and 4K DWORD SRAM.DM9000 supports 3.3V and 5V voltage simultaneously,
It can be connected directly with S3C6410 processor, Media Independent Interface (MII, the Media Independent of standard is provided
Interface) interface meets IEEE802.3 standard, can be in access to LAN by network interface.
In hardware circuit design, 16 universaling I/O ports of S3C6410 connect DM9000's with data multiplexing line as address
SD0-SD15 pin, IOR#, IOW# and INT pin of I/O mouthfuls of the other three connection DM9000, control processor reads life respectively
It enables, processor write order and initialization command.
Serial port circuit is common a kind of interface in embedded system, although transmission rate is slower, has and simply may be used
By the advantages of, as long as single line realizes two-way communication.Serial ports in gateway controller be mainly used for connecting with PC machine into
Row communication and debugging can be in the terminal operation gateways of PC machine by setting minicom tool under the linux system of PC machine
Controller greatly improves debugging and testing efficiency；On the other hand, some network modules all have monolithic solution party at present
Case, such as some Zigbee chips are all integrated with microprocessor, due to cost problem or processing speed problem, these micro processs
Device is all without USB interface, but basic major part has serial ports, connects in this way with some low rate monolithic embedded radio modules
When connecing, it can be connected by serial ports.Based on the considerations of this scalability, gateway controller extends 3 serial ports.
Serial ports has multiple standards such as RS232-C, RS422 and RS485 etc., and general PC machine uses RS232 standard, and serial ports connects
Mouth uses DB9 interface.S3C6410 has 3 Asynchronous Serial Interface (UART, Universal Asynchronous Receive
Transmitter), the level of UART uses the Transistor-Transistor Logic level of 3.3V, and RS232-C uses negative logic level, and -3V~-15V is
Logical one, 3V~15V is logical zero, so needing to carry out level conversion with SP3232 chip.SP3232 operating voltage is 3v
Two-way level conversion can be provided to 5.5V, every SP3232, system uses the UART0- of two panels SP3232 connection S3C6410
The RXD and TXD of UART2, the TXD after conversion connect standard DB9 interface with RXD.
LCD display can show the state of current gateway, and Debugging message, while LCD can be shown in debugging process
Display screen has touch function, can carry out information input by dummy keyboard or carry out touch-control on the interface of program,
Realize human-computer interaction function.Gateway controller creates 7 cun of LCD modules using group, has carried liquid crystal driver in module, only need to be with
The respective pin of S3C6410 connects.
Terminal access section needs to realize wireless local area network AP function, it is contemplated that more and more integration of equipments wifi mould
Block can obtain maximum applicability using the most IEEE802.11g wireless network card of current application.
IEEE802.11g wireless interface module uses the TL-WN321G+ wireless network card of TP-LINK company, TL-WN321G+
Wireless network card uses USB interface, peak transfer rate 54Mbps, 100m, outdoor 300m in maximum transmission distance room.
TL-WN321G+ work in 2.4GHz frequency range, maximum transmission power 20dBm, while support IEEE802.11b and
IEEE802.11g standard, peak transfer rate is 11Mbps, maximum under IEEE802.11g standard under IEEE802.11b standard
Transmission rate is 54Mbps.It can be worked under IEEE802.11g mode in Master mode, Managed mode and Ad
Hoc mode.TL-WN321G+ interface supports USB1.1 and USB2.0 standard.TL-WN321G+ can be supported currently in secure context
WPA-PSK/WPA2-PSK, WPA/WPA2 and WEP of mainstream are encrypted.
The 3G network and rate that network interface portion provides wide coverage are fastly but only in the wireless of hot zones covering
Lan interfaces.Wherein, 3G network includes tri- kinds of network modules of WCDMA, TD-SCDMA and cdma2000, to guarantee that gateway exists
Different location can select optimal 3G network.WLAN uses IEEE802.11g interface module, because of current big portion
WLAN is divided all to support IEEE802.11g standard.
WCDMA module uses Huawei Company E1750 3G network interface card.
E1750 supports 3G and 2G both of which, and HSUPA, HSDPA and UMTS are supported under 3G mode, is supported under 2G mode
EDGE, GPRS and GSM.The downlink transmission data rate of E1750 is up to 7.2Mbps, and higher uplink bit rate is up to
5.76Mbps supports data and short message service.E1750 uses USB interface, can be with plug and play.
TD-SCDMA module uses the MU351 3G network interface card of Zhong Xing company.
MU351 supports 3G and 2G both of which, and TD-SCDMA network is supported under 3G mode, supported under 2G mode EDGE,
GPRS and GSM.The downlink transmission data rate of MU351 is up to 2.8Mbps, and higher uplink bit rate is up to
236.8kbps.MU351 uses USB interface, can be with plug and play.
Cdma2000 module uses the AC8710 3G network interface card of Zhong Xing company.AC8710 supports 3G and 2G both of which, network
Type supports cdma2000 1x EV-DO Rev.A and cdma2000 1x RTT, message transmission rate 3.1Mbps.AC8710
Support that data, voice and SMS function can be with plug and play using USB interface.
As shown in fig. 6, the software section of wireless multi-mode gateway system be hardware platform realize on the basis of develop answer
With software, function that system platform may be implemented wireless aps function and 3G dials up on the telephone.
Application software mainly completes two-part function: a part is wireless aps and 3G network configuration and monitoring function, packet
AP parameter configuration is included, AP, 3G network dialing and break function are started and stopped；Another part function be realize WLAN and
3G network connectivity capabilities, to allow wireless device by wireless multi-mode gateway accessing into external 3G network, because of system
Design can access three kinds of 3G networks simultaneously, so software will also be realized to three kinds of network monitorings, and the suitable 3G net of selection
The function of network, network selection, which is divided into, automatically selects and manually selects two ways.As can be seen that software from the flow chart of software
It is broadly divided into three parts: AP function management, 3G network management and routing and network selected section.Wherein, AP function management part
Realize that AP parameter configuration, Dhcp parameter configuration start and stop AP function, the functions such as wireless device of detection access AP.3G net
Network administrative section realizes the function that 3G dials up on the telephone, and 3G network information collection and 3G network information are shown.Due to actually using
In the process, 3G network covers bad place in some signals and can often go offline, and dials again automatically so being added to 3G network
Function.Routing and network selected section are embodied as the function that wireless device selects suitable 3G network access, provide automatic choosing
Select and manually select two kinds of selection modes.Flow control control can be provided for wireless device simultaneously, that is, limits some access
Equipment network rate obtained can also complete the function in terms of load balancing and link backup.
Certainly, described above is only that presently preferred embodiments of the present invention is answered the present invention is not limited to enumerate above-described embodiment
When explanation, anyone skilled in the art is all equivalent substitutes for being made, bright under the introduction of this specification
Aobvious variant, all falls within the essential scope of this specification, ought to be by protection of the invention.
Claims (4)
1. a kind of car networking wireless multi-mode gateway system characterized by comprising
Terminal access section is configurable for providing the access of WLAN；
Network interface portion is configurable for realizing gateway accessing to different external networks；And
Gateway control portion is configurable for realizing the communication between in-vehicle device and external network.
2. a kind of car networking wireless multi-mode gateway system according to claim 1, which is characterized in that the terminal access section
Using IEEE802.11g wireless interface module.
3. a kind of car networking wireless multi-mode gateway system according to claim 1, which is characterized in that the network interface portion
Including 3G module and IEEE802.11g wireless interface module.
4. a kind of car networking wireless multi-mode gateway system according to claim 1, which is characterized in that the gateway control portion
Including a gateway controller, terminal access section and network inter-face portion do not pass through USB interface and are connected with gateway controller.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810261211.9A CN108668259A (en) | 2018-03-28 | 2018-03-28 | A kind of car networking wireless multi-mode gateway system |
| CN2018102612119 | 2018-03-28 |
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| CN201811357330.0A Pending CN109413613A (en) | 2018-03-28 | 2018-11-15 | A kind of car networking wireless multi-mode gateway system |
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| CN113905461A (en) * | 2021-10-27 | 2022-01-07 | 奇瑞商用车（安徽）有限公司 | Wireless communication module of integrated gateway |
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| CN111010622A (en) * | 2019-12-20 | 2020-04-14 | 扬州扬吉信息科技有限公司 | Base gateway device |
| CN115004730A (en) * | 2020-01-29 | 2022-09-02 | 沃尔沃卡车集团 | Wireless network access for user terminal device and gateway device in vehicle |
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| Publication number | Publication date |
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| CN108668259A (en) | 2018-10-16 |
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Application publication date: 20190301 |