CN102752201A - Ethernet-based car multimedia information transmission system and method - Google Patents
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Abstract
本发明公开一种基于以太网的汽车多媒体信息传输系统及方法，所述基于以太网的汽车多媒体信息传输系统，包括用于设置在汽车的车身上的一交换机和若干个以太网设备，其中所述交换机与以太网设备之间通过有线或无线的方式进行连接；所述交换机为以太网交换机；所述以太网设备包括车载多媒体设备，和与所述车载多媒体设备连接的以太网模块，所述以太网模块设置在所述车载多媒体设备上。本发明所提供的基于以太网的汽车多媒体信息传输系统及方法，是将以太网作为介质的车载局域网模型，以解决汽车多媒体信息共享难、传输速度慢的问题。
The present invention discloses an Ethernet-based car multimedia information transmission system and method. The Ethernet-based car multimedia information transmission system includes a switch and several Ethernet devices for setting on the car body, wherein the The switch is connected to the Ethernet device in a wired or wireless manner; the switch is an Ethernet switch; the Ethernet device includes a vehicle-mounted multimedia device, and an Ethernet module connected to the vehicle-mounted multimedia device, the The Ethernet module is set on the vehicle multimedia equipment. The Ethernet-based automotive multimedia information transmission system and method provided by the present invention is a vehicle-mounted local area network model using Ethernet as a medium to solve the problems of difficult sharing and slow transmission speed of automotive multimedia information.
Description
技术领域 technical field
本发明涉及汽车电子设备领域，尤其涉及一种基于以太网的汽车多媒体信息传输系统及方法。 The invention relates to the field of automotive electronic equipment, in particular to an Ethernet-based automotive multimedia information transmission system and method.
背景技术 Background technique
随着技术的进步，汽车上的多媒体设备越来越多，当今汽车上普遍通过CAN、LIN等总线来连接各个多媒体设备。采用CAN、LIN等总线技术连接虽然可靠性高，但数据传播速率慢，达不到多媒体数据传输的要求。而刚刚发展起来的MOST总线技术还不成熟，在汽车上使用成本及技术难度太高，暂时不适用于普通汽车。 With the advancement of technology, there are more and more multimedia devices on the car. Today's cars generally connect various multimedia devices through buses such as CAN and LIN. Although CAN, LIN and other bus technologies are used to connect, although the reliability is high, the data transmission rate is slow, which cannot meet the requirements of multimedia data transmission. However, the newly developed MOST bus technology is still immature, and the cost and technical difficulty of using it in automobiles are too high, so it is not suitable for ordinary automobiles for the time being.
因此，现有技术还有待于改进和发展。 Therefore, the prior art still needs to be improved and developed.
发明内容 Contents of the invention
鉴于上述现有技术的不足，本发明的目的在于提供一种基于以太网的汽车多媒体信息传输系统及方法，旨在解决现有汽车内多媒体设备之间的数据传输慢的问题。 In view of the above deficiencies in the prior art, the object of the present invention is to provide an Ethernet-based automotive multimedia information transmission system and method, aiming at solving the problem of slow data transmission between multimedia devices in existing vehicles.
本发明的技术方案如下： Technical scheme of the present invention is as follows:
一种基于以太网的汽车多媒体信息传输系统，其中，包括用于设置在汽车的车身上的一交换设备和若干个以太网设备，其中所述交换设备与以太网设备之间通过有线或无线的方式进行连接； A car multimedia information transmission system based on Ethernet, which includes a switching device and several Ethernet devices for setting on the body of the car, wherein the switching device and the Ethernet device are connected by wired or wireless way to connect;
所述交换设备为以太网交换设备，所述交换设备为交换机或路由器；所述以太网设备包括车载多媒体设备，和与所述车载多媒体设备连接的以太网模块，所述以太网模块设置在所述车载多媒体设备上； The switching device is an Ethernet switching device, and the switching device is a switch or a router; the Ethernet device includes a vehicle-mounted multimedia device, and an Ethernet module connected to the vehicle-mounted multimedia device, and the Ethernet module is arranged on the on-board multimedia equipment;
所述车载多媒体设备通过自身的以太网模块将多媒体信息发送到交换设备；交换设备接收所述多媒体信息，并根据所述多媒体信息所包含的目的地地址，将所述多媒体信息转发到目的地地址对应的车载多媒体设备；目的地地址对应的车载多媒体设备通过自身的以太网模块接收所述多媒体信息。 The in-vehicle multimedia device sends the multimedia information to the switching device through its own Ethernet module; the switching device receives the multimedia information, and forwards the multimedia information to the destination address according to the destination address contained in the multimedia information Corresponding vehicle-mounted multimedia equipment; the vehicle-mounted multimedia equipment corresponding to the destination address receives the multimedia information through its own Ethernet module.
所述的基于以太网的汽车多媒体信息传输系统，其中，所述交换设备和所述以太网设备之间有线连接的方式包括双绞线、同轴电缆或光纤中的一种，无线连接的方式包括wifi。 The Ethernet-based automotive multimedia information transmission system, wherein the wired connection between the switching device and the Ethernet device includes one of twisted pair, coaxial cable or optical fiber, and the wireless connection including wifi.
所述的基于以太网的汽车多媒体信息传输系统，其中，所述基于以太网的汽车多媒体信息传输系统还包括一互联网模块，所述互联网模块与所述交换设备相连，所述互联网模块用于访问互联网，获取互联网的信息。 The Ethernet-based automotive multimedia information transmission system, wherein, the Ethernet-based automotive multimedia information transmission system also includes an Internet module, the Internet module is connected to the switching device, and the Internet module is used to access Internet, access to information on the Internet.
一种使用上述的基于以太网的汽车多媒体信息传输系统传输多媒体信息的方法，其中，包括以下步骤： A method for transmitting multimedia information using the above-mentioned Ethernet-based automobile multimedia information transmission system, wherein, comprising the following steps:
S100、车载多媒体设备通过自身的以太网模块将多媒体信息发送到交换设备； S100, the vehicle multimedia device sends the multimedia information to the switching device through its own Ethernet module;
S200、交换机接收所述多媒体信息，并根据所述多媒体信息所包含的目的地地址，将所述多媒体信息转发到目的地地址对应的车载多媒体设备； S200. The switch receives the multimedia information, and forwards the multimedia information to the vehicle-mounted multimedia device corresponding to the destination address according to the destination address contained in the multimedia information;
S300、目的地地址对应的车载多媒体设备通过自身的以太网模块接收所述多媒体信息。 S300. The in-vehicle multimedia device corresponding to the destination address receives the multimedia information through its own Ethernet module.
有益效果：采用本发明所提供的基于以太网的汽车多媒体信息传输系统和方法，传输速度快，能满足多媒体数据传输的要求，而且成本低。当所述以太网设备与交换设备通过wifi的方式相连时，还能减少车内线束，方便加装车载多媒体设备，减少对车体的破坏。 Beneficial effects: the Ethernet-based automotive multimedia information transmission system and method provided by the present invention have high transmission speed, can meet the requirements of multimedia data transmission, and have low cost. When the Ethernet device is connected to the switching device through wifi, it can also reduce the wiring harness in the vehicle, facilitate the installation of vehicle multimedia equipment, and reduce damage to the vehicle body.
附图说明 Description of drawings
图1为本发明的基于以太网的汽车多媒体信息传输系统的整体结构示意图。 FIG. 1 is a schematic diagram of the overall structure of the Ethernet-based automobile multimedia information transmission system of the present invention.
图2为本发明的基于以太网的汽车多媒体信息传输系统的功能结构框图。 Fig. 2 is a functional structural block diagram of the Ethernet-based automotive multimedia information transmission system of the present invention.
图3为采用本发明的基于以太网的汽车多媒体信息传输系统传输多媒体信息的方法的流程图。 FIG. 3 is a flowchart of a method for transmitting multimedia information using the Ethernet-based automotive multimedia information transmission system of the present invention.
具体实施方式 Detailed ways
本发明提供一种基于以太网的汽车多媒体信息传输系统及方法，为使本发明的目的、技术方案及效果更加清楚、明确，以下对本发明进一步详细说明。应当理解，此处所描述的具体实施例仅仅用以解释本发明，并不用于限定本发明。 The present invention provides a car multimedia information transmission system and method based on Ethernet. In order to make the purpose, technical solution and effect of the present invention clearer and clearer, the present invention will be further described in detail below. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
由于现有汽车技术越来与发达，汽车上设置的多媒体设备越来越多，但各多媒体设备之间的多媒体数据的传输却达不到用户的要求。而以太网在民用及工控领域使用多年，已非常成熟，而且成本上也有极大的优势，因此，本发明所提供的一种基于以太网的汽车多媒体信息传输系统及方法，是将以太网作为介质的车载局域网模型，以解决汽车多媒体信息共享难、传输速度慢的问题。 As the existing automobile technology is more and more developed, more and more multimedia devices are installed on the car, but the transmission of multimedia data between each multimedia device cannot meet the requirements of users. However, Ethernet has been used in civil and industrial control fields for many years, and it is very mature, and it also has great advantages in cost. Therefore, a kind of Ethernet-based automobile multimedia information transmission system and method provided by the present invention is to use Ethernet as The vehicle-mounted local area network model of the medium solves the problems of difficult sharing and slow transmission speed of multimedia information in vehicles.
所述基于以太网的汽车多媒体信息传输系统，如图1所示包括用于设置在汽车的车身上的一交换设备和若干个以太网设备，其中所述交换设备与以太网设备之间通过有线或无线的方式进行连接。 Described Ethernet-based automotive multimedia information transmission system, as shown in Figure 1, includes a switching device and several Ethernet devices for being arranged on the vehicle body of the car, wherein the switching device and the Ethernet device are wired or connect wirelessly.
所述交换设备为以太网交换设备，所述交换设置为交换机或路由器，所述交换设备可以设置在车身的任何地方，只要其不影响汽车运行即可。如图2所示，所述以太网设备包括车载多媒体设备，和与所述车载多媒体设备连接的以太网模块，所述以太网模块设置在所述车载多媒体设备上。每个车载多媒体设备均与一以太网模块连接。所述以太网模块用于将多媒体数据发送到交换设备，和接收通过交换设备转发的多媒体数据，所述以太网模块可以为以太网网卡等。所述车载多媒体设备可以通过PCI总线、SPI总线或USB网卡与所述以太网模块相连，然后进行多媒体数据交换。由于以太网可以扩展无数个节点，所以对所述汽车多媒体信息传输系统中的以太网设备的个数不会有限制，而CAN总线则不行，最多只能扩展60个节点。 The switching device is an Ethernet switching device, and the switching device is configured as a switch or a router, and the switching device can be arranged anywhere on the vehicle body as long as it does not affect the operation of the vehicle. As shown in FIG. 2 , the Ethernet device includes a vehicle-mounted multimedia device, and an Ethernet module connected to the vehicle-mounted multimedia device, and the Ethernet module is arranged on the vehicle-mounted multimedia device. Each vehicle multimedia device is connected with an Ethernet module. The Ethernet module is used to send the multimedia data to the switching device and receive the multimedia data forwarded by the switching device, and the Ethernet module may be an Ethernet network card or the like. The vehicle-mounted multimedia device can be connected to the Ethernet module through a PCI bus, an SPI bus or a USB network card, and then perform multimedia data exchange. Since the Ethernet can expand countless nodes, there is no limit to the number of Ethernet devices in the automotive multimedia information transmission system, but the CAN bus cannot, and can only expand 60 nodes at most.
所述交换设备和所述以太网设备之间有线连接的方式包括双绞线、同轴电缆或光纤等中的一种，无线连接的方式包括wifi。所述交换设备和所述以太网设备之间通过双绞线、同轴电缆或光纤连接时，其多媒体的数据传播速度比总线的传播速度快，而且若是采用光纤连接时，所述多媒体的传输的抗干扰能力很强。在多种连接方式之中，优选为选用wifi的方式进行连接，因为采用wifi的方式连接可减少汽车内的线束设置，并且可以减少在车身内打洞穿线以减少对车体的破坏，而且方便加装所述车载多媒体设备。 The wired connection between the switching device and the Ethernet device includes one of twisted pair, coaxial cable, or optical fiber, and the wireless connection includes wifi. When the switching device and the Ethernet device are connected by a twisted pair, a coaxial cable or an optical fiber, the transmission speed of the multimedia data is faster than that of the bus, and if the optical fiber connection is used, the transmission of the multimedia The anti-interference ability is very strong. Among the various connection methods, it is preferred to use wifi for connection, because the use of wifi connection can reduce the wiring harness settings in the car, and can reduce the number of holes and threads in the car body to reduce damage to the car body, and it is convenient The vehicle-mounted multimedia equipment is installed additionally.
所述车载多媒体设备包括光驱、数字媒体播放器、收音机、显示器、扬声器、卫星导航系统或摄像头等中的一种或多种。将摄像头图像、声音图像、多媒体设备输出的视频图像等多媒体信息发送到以太网上，各个以太网内设备之间能共享这些信息，传输速度快，可以满足汽车对多媒体信息传输的要求。 The vehicle multimedia equipment includes one or more of optical drive, digital media player, radio, display, speaker, satellite navigation system or camera. Send multimedia information such as camera images, audio images, and video images output by multimedia devices to the Ethernet. The information can be shared between devices in the Ethernet, and the transmission speed is fast, which can meet the requirements of automobiles for multimedia information transmission.
下面以所述交换设备和所述以太网设备之间通过wifi为连接方式的所述基于以太网的汽车多媒体信息传输系统实施例，对本发明进行说明。 The present invention will be described below by taking the embodiment of the Ethernet-based automotive multimedia information transmission system in which the switching device and the Ethernet device are connected via wifi.
具体地，所述基于以太网的汽车多媒体信息传输系统中的车载多媒体设备通过PCI总线、SPI总线或USB网卡与以太网模块相连接，以太网模块通过无线wifi的方式与交换设备相连。交换设备支持wifi，以太网设备在有多媒体数据发送的时候会通过以太网模块将多媒体数据发送到交换设备，交换设备再通过多媒体数据包含的目的地地址信息判定这个多媒体数据要发送的对象（以MAC地址来做判定）将这个多媒体数据信息转发到与所述目的地地址相对应的以太网设备。如果这个多媒体数据信息包含的目的地地址是广发型的数据，则交换设备会将这个多媒体数据信息发送给这个车载局域网内的所有的以太网设备。当相应的以太网设备收到交换设备发送到标志有自身MAC地址或者标志有广发型数据的数据帧时，就会接收这个数据信息，通过PCI总线接口、SPI总线接口或USB接口传输到车载多媒体设备中。 Specifically, the vehicle multimedia equipment in the Ethernet-based vehicle multimedia information transmission system is connected to the Ethernet module through the PCI bus, SPI bus or USB network card, and the Ethernet module is connected to the switching device through wireless wifi. The switching device supports wifi. When the Ethernet device has multimedia data to send, it will send the multimedia data to the switching device through the Ethernet module. MAC address to make a decision) forward this multimedia data information to the Ethernet device corresponding to the destination address. If the destination address contained in the multimedia data message is broadcast data, the switching device will send the multimedia data message to all the Ethernet devices in the vehicle local area network. When the corresponding Ethernet device receives a data frame marked with its own MAC address or marked with broadcast data sent by the switching device, it will receive this data information and transmit it to the vehicle multimedia through the PCI bus interface, SPI bus interface or USB interface. in the device.
所述基于以太网的汽车多媒体信息传输系统，还可以包括一互联网模块，所述互联网模块与所述交换设备相连，所述互联网模块用于访问互联网，获取互联网的信息。这样，所述基于以太网的汽车多媒体信息传输系统网络不仅能与互联网相连，还能与其他汽车的车载多媒体设备进行连接。比如，车队出行，带头的汽车通过摄像头拍摄路面情况，然后摄像头的录像通过以太网模块将数据信息发送到交换设备，交换设备可以根据数据信息中包含的显示器的MAC地址将数据信息发送到本车的显示器，通过显示器播放出来，也可以通过互联网模块将所述数据信息共享到车队中的其他汽车中，这样车队中的其他汽车也能同时看到前方路面情况，而不需要通过其他的通讯方式将路面情况互相告知，减少通讯联络的麻烦。 The Ethernet-based vehicle multimedia information transmission system may also include an Internet module connected to the switching device, and the Internet module is used for accessing the Internet and obtaining information on the Internet. In this way, the Ethernet-based car multimedia information transmission system network can not only be connected with the Internet, but also be connected with other car multimedia devices. For example, when a convoy travels, the leading car shoots the road conditions through the camera, and then the camera video sends the data information to the switching device through the Ethernet module, and the switching device can send the data information to the vehicle according to the MAC address of the display contained in the data information. The display can be played through the display, and the data information can also be shared with other cars in the fleet through the Internet module, so that other cars in the fleet can also see the road conditions ahead at the same time without using other communication methods Inform each other of the road conditions to reduce the trouble of communication.
本发明中还提供使用所述基于以太网的汽车多媒体信息传输系统传输多媒体信息的方法，如图3所示，其具体步骤如下： The present invention also provides the method of using the Ethernet-based automotive multimedia information transmission system to transmit multimedia information, as shown in Figure 3, and its specific steps are as follows:
S100、车载多媒体设备通过自身的以太网模块将多媒体信息发送到交换设备； S100, the vehicle multimedia device sends the multimedia information to the switching device through its own Ethernet module;
S200、交换设备接收所述多媒体信息，并根据所述多媒体信息所包含的目的地地址，将所述多媒体信息转发到目的地地址对应的车载多媒体设备； S200. The switching device receives the multimedia information, and forwards the multimedia information to the vehicle-mounted multimedia device corresponding to the destination address according to the destination address contained in the multimedia information;
S300、目的地地址对应的车载多媒体设备通过自身的以太网模块接收所述多媒体信息。 S300. The in-vehicle multimedia device corresponding to the destination address receives the multimedia information through its own Ethernet module.
所述步骤S200中，当所述多媒体信息中包含的目的地地址为某个车载多媒体设备的MAC地址，则所述交换设备将所述多媒体信息转发到所述目的地地址所对应的车载多媒体设备。当所述多媒体信息中包含的目的地地址为广发型地址信息，则所述交换设备将所述多媒体信息转发到除发出所述多媒体信息的车载多媒体设备以外的其他的车载多媒体设备。 In the step S200, when the destination address contained in the multimedia information is the MAC address of a vehicle multimedia device, the switching device forwards the multimedia information to the vehicle multimedia device corresponding to the destination address . When the destination address contained in the multimedia information is broadcast address information, the switching device forwards the multimedia information to other vehicle-mounted multimedia devices except the vehicle-mounted multimedia device sending the multimedia information.
采用本发明所提供的基于以太网的汽车多媒体信息传输系统和方法，传输速度快，能满足多媒体数据传输的要求，而且成本低。当所述以太网设备与交换设备通过wifi的方式相连时，还能减少车内线束，方便加装车载多媒体设备，减少对车体的破坏。 The Ethernet-based automotive multimedia information transmission system and method provided by the present invention have high transmission speed, can meet the requirements of multimedia data transmission, and have low cost. When the Ethernet device is connected to the switching device through wifi, it can also reduce the wiring harness in the vehicle, facilitate the installation of vehicle multimedia equipment, and reduce damage to the vehicle body.
应当理解的是，本发明的应用不限于上述的举例，对本领域普通技术人员来说，可以根据上述说明加以改进或变换，所有这些改进和变换都应属于本发明所附权利要求的保护范围。 It should be understood that the application of the present invention is not limited to the above examples, and those skilled in the art can make improvements or transformations according to the above descriptions, and all these improvements and transformations should belong to the protection scope of the appended claims of the present invention.
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