CN102752201A - Ethernet-based car multimedia information transmission system and method - Google Patents
Ethernet-based car multimedia information transmission system and method Download PDFInfo
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- CN102752201A CN102752201A CN2012102150822A CN201210215082A CN102752201A CN 102752201 A CN102752201 A CN 102752201A CN 2012102150822 A CN2012102150822 A CN 2012102150822A CN 201210215082 A CN201210215082 A CN 201210215082A CN 102752201 A CN102752201 A CN 102752201A
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Abstract
The invention discloses an Ethernet-based car multimedia information transmission system and a method. The Ethernet-based car multimedia information transmission system comprises a switch which is arranged on a car body and a plurality of Ethernet devices, wherein the switch is connected with the Ethernet devices through a wire or in a wireless way; the switch is an Ethernet switch; and each Ethernet device comprises a car-mounted multimedia device and an Ethernet module which is connected with the car-mounted multimedia device, and each Ethernet module is arranged on the car-mounted multimedia device. According to the Ethernet-based car multimedia information transmission system and method, a car-mounted local area network model adopting the Ethernet as a medium is realized, so that the problems of difficulty in car multimedia information sharing and slowness in transmission speed can be solved.
Description
Technical field
The present invention relates to the vehicle electronics field, relate in particular to a kind of car multimedia information transmission system and method based on Ethernet.
Background technology
Along with development of technology, the multimedia equipment on the automobile is more and more, generally connects each multimedia equipment through buses such as CAN, LIN on the current automobile.Though it is high to adopt bussing techniques such as CAN, LIN to connect reliability, data dissemination speed is slow, does not reach the requirement of multi-medium data transmission.And the MOST bussing technique that has just grown up that is that all right is ripe, use cost and technical difficulty are too high on automobile, temporarily are not suitable for general-utility car.
Therefore, prior art awaits to improve and development.
Summary of the invention
Deficiency in view of above-mentioned prior art the object of the present invention is to provide a kind of car multimedia information transmission system and method based on Ethernet, is intended to solve the existing slow problem of automobile inner multimedia data transfer between devices.
Technical scheme of the present invention is following:
A kind of car multimedia information transmission system based on Ethernet; Wherein, Comprise a switching equipment and several ethernet devices on the vehicle body that is used to be arranged on automobile, be connected through wired or wireless mode between wherein said switching equipment and the ethernet device;
Said switching equipment is an ethernet switching device, and said switching equipment is switch or router; Said ethernet device comprises vehicle mounted multimedia equipment, and with the ethernet module that is connected with said vehicle mounted multimedia equipment, said ethernet module is arranged on the said vehicle mounted multimedia equipment;
Said vehicle mounted multimedia equipment sends to switching equipment through the ethernet module of self with multimedia messages; Switching equipment receives said multimedia messages, and according to the destination-address that said multimedia messages comprised, said multimedia messages is forwarded to the corresponding vehicle mounted multimedia equipment of destination-address; The vehicle mounted multimedia equipment of destination-address correspondence receives said multimedia messages through the ethernet module of self.
The described car multimedia information transmission system based on Ethernet, wherein, the mode of wired connection comprises a kind of in twisted-pair feeder, coaxial cable or the optical fiber between said switching equipment and the said ethernet device, the mode of wireless connections comprises wifi.
The described car multimedia information transmission system based on Ethernet; Wherein, The said car multimedia information transmission system based on Ethernet also comprises an internet module; Said internet module links to each other with said switching equipment, and said internet module is used for access internet, obtains the information of the Internet.
A kind of method of using above-mentioned car multimedia information transmission system transmitting multimedia information based on Ethernet wherein, may further comprise the steps:
S100, vehicle mounted multimedia equipment send to switching equipment through the ethernet module of self with multimedia messages;
S200, switch receive said multimedia messages, and according to the destination-address that said multimedia messages comprised, said multimedia messages are forwarded to the corresponding vehicle mounted multimedia equipment of destination-address;
The vehicle mounted multimedia equipment of S300, destination-address correspondence receives said multimedia messages through the ethernet module of self.
Beneficial effect: adopt the car multimedia information transmission system and the method based on Ethernet provided by the present invention, transmission speed is fast, can satisfy the requirement of multi-medium data transmission, and cost is low.When said ethernet device and the switching equipment mode through wifi links to each other, can also reduce wire harness in the car, conveniently install vehicle mounted multimedia equipment additional, reduce destruction to car body.
Description of drawings
Fig. 1 is the overall structure sketch map of the car multimedia information transmission system based on Ethernet of the present invention.
Fig. 2 is the functional block diagram of the car multimedia information transmission system based on Ethernet of the present invention.
Fig. 3 is the flow chart of the method that adopts the car multimedia information transmission system transmitting multimedia information based on Ethernet of the present invention.
Embodiment
The present invention provides a kind of car multimedia information transmission system and method based on Ethernet, and is clearer, clear and definite for making the object of the invention, technical scheme and effect, below to further explain of the present invention.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
Because existing automotive engineering is more next and flourishing, the multimedia equipment that is provided with on the automobile is more and more, but the transmission of the multi-medium data between each multimedia equipment does not reach user's requirement.And Ethernet uses for many years at civilian and industrial control field; Very ripe; And great advantage is also arranged on the cost, and therefore, a kind of the car multimedia information transmission system and method provided by the present invention based on Ethernet; Be with the vehicle-mounted local area network (LAN) model of Ethernet as medium, the car multimedia information sharing is difficult to solve, the slow problem of transmission speed.
The said car multimedia information transmission system based on Ethernet; Be connected through wired or wireless mode between the switching equipment and several ethernet devices that comprises on the vehicle body that is used to be arranged on automobile as shown in Figure 1, wherein said switching equipment and ethernet device.
Said switching equipment is an ethernet switching device, and said exchange is set to switch or router, and said switching equipment can be arranged on vehicle body Anywhere, as long as it does not influence automobilism.As shown in Figure 2, said ethernet device comprises vehicle mounted multimedia equipment, and with the ethernet module that is connected with said vehicle mounted multimedia equipment, said ethernet module is arranged on the said vehicle mounted multimedia equipment.Each vehicle mounted multimedia equipment all is connected with an ethernet module.Said ethernet module is used for multi-medium data is sent to switching equipment and receives the multi-medium data of transmitting through switching equipment, and said ethernet module can be for ethernet nic etc.Said vehicle mounted multimedia equipment can pass through pci bus, spi bus or USB network interface card and link to each other with said ethernet module, carries out the multi-medium data exchange then.Because Ethernet can be expanded numerous node, so the number of the ethernet device in the said car multimedia information transmission system is not had restriction, the CAN bus is then not all right, can only expand 60 nodes at most.
The mode of wired connection comprises a kind of in twisted-pair feeder, coaxial cable or the optical fiber etc. between said switching equipment and the said ethernet device, and the mode of wireless connections comprises wifi.When passing through twisted-pair feeder, coaxial cable or optical fiber connection between said switching equipment and the said ethernet device; Its multimedia data dissemination speed is faster than the propagation velocity of bus; If when adopting optical fiber to connect, the antijamming capability of said multimedia transmission is very strong.Among multiple connected mode; Be preferably and select for use the mode of wifi to connect; Because adopt the mode of wifi to connect the wire harness setting that can reduce in the automobile, and can reduce the threading that in vehicle body, burrows, and conveniently install said vehicle mounted multimedia equipment additional with the destruction of minimizing to car body.
Said vehicle mounted multimedia equipment comprises CD-ROM drive, digital media player, broadcast receiver, display, loud speaker, satellite navigation system or in first-class one or more of making a video recording.The multimedia messagess such as video image of camera image, audiovideo, multimedia equipment output are sent on the Ethernet, can share these information between the equipment in each Ethernet, transmission speed is fast, can satisfy the requirement of automobile to the multimedia messages transmission.
To be the said car multimedia information transmission system embodiment based on Ethernet of connected mode through wifi between said switching equipment and the said ethernet device, the present invention will be described below.
Particularly, saidly be connected with ethernet module through pci bus, spi bus or USB network interface card based on the vehicle mounted multimedia equipment in the car multimedia information transmission system of Ethernet, ethernet module links to each other with switching equipment through the mode of wireless wifi.Switching equipment is supported wifi; Ethernet device can send to switching equipment with multi-medium data through ethernet module when having multi-medium data to send, the destination-address information that switching equipment comprises through multi-medium data again judges that the object (doing judgement with MAC Address) that this multi-medium data will send is forwarded to this multimedia data information and the corresponding ethernet device of said destination-address.If the destination-address that this multimedia data information comprises is the data of wide hair style, then switching equipment can send to all ethernet devices in this vehicle-mounted local area network (LAN) with this multimedia data information.When corresponding ethernet device receives that switching equipment sends to sign and self MAC address or sign arranged when the Frame of wide hair style data is arranged; Will receive this data message, be transferred in the vehicle mounted multimedia equipment through pci bus interface, spi bus interface or USB interface.
The said car multimedia information transmission system based on Ethernet can also comprise an internet module, and said internet module links to each other with said switching equipment, and said internet module is used for access internet, obtains the information of the Internet.Like this, said car multimedia information transmission system network based on Ethernet can not only link to each other with the Internet, can also be connected with the vehicle mounted multimedia equipment of other automobiles.Such as; Fleet's trip, the automobile of taking the lead is taken the road surface situation through camera, and the video recording of camera sends to switching equipment through ethernet module with data message then; Switching equipment can send to data message the display of this car according to the MAC Address of the display that comprises in the data message; Play back through display, also can be through internet module with in said data information sharing other automobiles in the fleet, other automobiles in the fleet also can be seen road surface, the place ahead situation simultaneously like this; And need the road surface situation not informed mutually through other communication modes, reduce the trouble of communication.
The method of using said car multimedia information transmission system transmitting multimedia information based on Ethernet also is provided among the present invention, and as shown in Figure 3, its concrete steps are following:
S100, vehicle mounted multimedia equipment send to switching equipment through the ethernet module of self with multimedia messages;
S200, switching equipment receive said multimedia messages, and according to the destination-address that said multimedia messages comprised, said multimedia messages are forwarded to the corresponding vehicle mounted multimedia equipment of destination-address;
The vehicle mounted multimedia equipment of S300, destination-address correspondence receives said multimedia messages through the ethernet module of self.
Among the said step S200, the destination-address that in said multimedia messages, comprises is the MAC Address of certain vehicle mounted multimedia equipment, and then said switching equipment is forwarded to the pairing vehicle mounted multimedia equipment of said destination-address with said multimedia messages.The destination-address that in said multimedia messages, comprises is wide hair style address information, and then said switching equipment is forwarded to other the vehicle mounted multimedia equipment except that the vehicle mounted multimedia equipment that sends said multimedia messages with said multimedia messages.
Adopt the car multimedia information transmission system and the method based on Ethernet provided by the present invention, transmission speed is fast, can satisfy the requirement of multi-medium data transmission, and cost is low.When said ethernet device and the switching equipment mode through wifi links to each other, can also reduce wire harness in the car, conveniently install vehicle mounted multimedia equipment additional, reduce destruction to car body.
Should be understood that application of the present invention is not limited to above-mentioned giving an example, concerning those of ordinary skills, can improve or conversion that all these improvement and conversion all should belong to the protection range of accompanying claims of the present invention according to above-mentioned explanation.
Claims (4)
1. car multimedia information transmission system based on Ethernet; It is characterized in that; Comprise a switching equipment and several ethernet devices on the vehicle body that is used to be arranged on automobile, be connected through wired or wireless mode between wherein said switching equipment and the ethernet device;
Said switching equipment is an ethernet switching device, and said ethernet switching device is switch or router; Said ethernet device comprises vehicle mounted multimedia equipment, with the ethernet module that is connected with said vehicle mounted multimedia equipment;
Said vehicle mounted multimedia equipment sends to switching equipment through the ethernet module of self with multimedia messages; Switching equipment receives said multimedia messages, and according to the destination-address that said multimedia messages comprised, said multimedia messages is forwarded to the corresponding vehicle mounted multimedia equipment of destination-address; The vehicle mounted multimedia equipment of destination-address correspondence receives said multimedia messages through the ethernet module of self.
2. the car multimedia information transmission system based on Ethernet according to claim 1; It is characterized in that; The mode of wired connection comprises a kind of in twisted-pair feeder, coaxial cable or the optical fiber between said switching equipment and the said ethernet device, and the mode of wireless connections comprises wifi.
3. the car multimedia information transmission system based on Ethernet according to claim 1; It is characterized in that; The said car multimedia information transmission system based on Ethernet also comprises an internet module; Said internet module links to each other with said switching equipment, and said internet module is used for access internet, obtains the information of the Internet.
4. a method of using the car multimedia information transmission system transmitting multimedia information based on Ethernet as claimed in claim 1 is characterized in that, may further comprise the steps:
S100, vehicle mounted multimedia equipment send to switching equipment through the ethernet module of self with multimedia messages;
S200, switching equipment receive said multimedia messages, and according to the destination-address that said multimedia messages comprised, said multimedia messages are forwarded to the corresponding vehicle mounted multimedia equipment of destination-address;
The vehicle mounted multimedia equipment of S300, destination-address correspondence receives said multimedia messages through the ethernet module of self.
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| CN2012102150822A CN102752201A (en) | 2012-06-27 | 2012-06-27 | Ethernet-based car multimedia information transmission system and method |
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| CN2012102150822A CN102752201A (en) | 2012-06-27 | 2012-06-27 | Ethernet-based car multimedia information transmission system and method |
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| CN103856492A (en) * | 2012-11-28 | 2014-06-11 | 德尔福电子(苏州)有限公司 | In-vehicle media shared system based on DLNA |
| CN105812234A (en) * | 2015-01-21 | 2016-07-27 | 宝马股份公司 | System expandability in respect of Ethernet in vehicle |
| CN106487688A (en) * | 2015-08-28 | 2017-03-08 | 惠州市德赛西威汽车电子股份有限公司 | A kind of vehicle-mounted multichannel method for routing and system |
| CN108494646A (en) * | 2018-05-23 | 2018-09-04 | 深圳湾趣堂科技有限公司 | A kind of network equipment for dense deployment intelligent terminal |
| CN111865424A (en) * | 2020-05-25 | 2020-10-30 | 深圳市周立功单片机有限公司 | Automobile optical fiber Ethernet communication device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103856492A (en) * | 2012-11-28 | 2014-06-11 | 德尔福电子(苏州)有限公司 | In-vehicle media shared system based on DLNA |
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| CN106487688A (en) * | 2015-08-28 | 2017-03-08 | 惠州市德赛西威汽车电子股份有限公司 | A kind of vehicle-mounted multichannel method for routing and system |
| CN108494646A (en) * | 2018-05-23 | 2018-09-04 | 深圳湾趣堂科技有限公司 | A kind of network equipment for dense deployment intelligent terminal |
| CN111865424A (en) * | 2020-05-25 | 2020-10-30 | 深圳市周立功单片机有限公司 | Automobile optical fiber Ethernet communication device |
| CN111865424B (en) * | 2020-05-25 | 2022-01-11 | 深圳市周立功单片机有限公司 | Automobile optical fiber Ethernet communication device |
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Application publication date: 20121024 |