WO2018192585A1

WO2018192585A1 - Transmission method and transmission device

Info

Publication number: WO2018192585A1
Application number: PCT/CN2018/084027
Authority: WO
Inventors: 祝建松
Original assignee: 罗伯特·博世有限公司; 祝建松
Priority date: 2017-04-21
Filing date: 2018-04-23
Publication date: 2018-10-25
Also published as: CN108737345A

Abstract

The present invention relates to a transmission method and a transmission device, the transmission method comprising: receiving a controller area network (CAN) message; and transmitting a signal related to the CAN message using low voltage difference signal (LVDS) technology. With the described method and device, an LVDS chip may be used to transmit a CAN message without increasing the cost of hardware.

Description

Transmission method and transmission device

The present application claims priority to Chinese Patent Application Serial No. JP-A No. No. No. No. No. No. No. No. No.

Technical field

The invention relates to the field of intelligent driving of automobiles, in particular to a transmission method and a transmission device.

Background technique

Conventional vehicles that are manually operated by the driver use a Controller Area Network (CAN) protocol to be used in various vehicle systems of the vehicle (eg, on-board computers, navigation devices, multimedia players, engine systems, braking systems, security systems, etc.) Transmit CAN messages.

Compared with a conventional vehicle, an intelligent driving vehicle that does not require manual manipulation by a driver adds an imaging device for collecting information around the vehicle in a video signal manner to assist the vehicle in intelligent driving. Since the CAN protocol cannot transmit video signals, low voltage differential signaling (LVDS) chips (ie, LVDS serializers and LVDS deserializers) are commonly used in intelligently driven vehicles to transmit video signals. LVDS is a technical standard that specifies the electrical characteristics of a differential serial communication protocol. Typical applications based on LVDS technology are high speed video, image and camera data transmission, and general purpose computer buses.

Conventional LVDS chips (ie, LVDS serializers and LVDS deserializers) are typically designed to transmit only video signals and I2C (Inter-Integrated Circuit) signals (eg, CMOS control signaling). In order to meet the requirements of both transmitting video signals and transmitting CAN messages in intelligently driven vehicles, the LVDS chips currently used in intelligently driven vehicles are usually added with additional cables and connectors for transmitting CAN messages, but this will increase the system. Hardware costs.

Summary of the invention

Embodiments of the present invention provide a transmission method and transmission apparatus that are capable of transmitting CAN messages using an LVDS chip without increasing hardware costs.

A transmission method according to an embodiment of the present invention includes: receiving a controller area network CAN message; and transmitting a signal related to the CAN message using a low voltage differential signal LVDS technique.

A transmission method according to an embodiment of the present invention includes: receiving a signal related to a controller area network CAN message transmitted using a low voltage differential signal LVDS technique; and acquiring the CAN message according to the received signal.

A transmission apparatus according to an embodiment of the present invention includes: a receiving module for receiving a controller area network CAN message; and a transmission module for transmitting a CAN message related to the CAN message by using a low voltage differential signal LVDS technique signal.

A transmission apparatus according to an embodiment of the present invention, comprising: a receiving module, configured to receive a signal related to a controller area network CAN message transmitted by using a low voltage differential signal LVDS technology; and an acquisition module for receiving according to the received The signal is obtained by the CAN message.

A serializer in accordance with an embodiment of the present invention includes: a processor; and a memory storing executable instructions that, when executed, cause the processor to perform the aforementioned method.

A deserializer according to an embodiment of the present invention includes: a processor; and a memory storing executable instructions that, when executed, cause the processor to perform the aforementioned method.

A machine readable storage medium in accordance with an embodiment of the present invention stores executable instructions that, when executed, cause a machine to perform the aforementioned method.

As can be seen from the above, the solution of the embodiment of the present invention does not add additional cables and connectors for CAN message transmission on the LVDS chip, and directly uses the LVDS technology to transmit CAN messages. Therefore, the embodiment of the present invention The solution can use the LVDS chip to transmit CAN messages without increasing hardware costs.

DRAWINGS

The features, characteristics, advantages and benefits of the present invention will become apparent from the following detailed description.

1 shows a block diagram of a transmission system in accordance with one embodiment of the present invention.

Figure 2 shows a general flow diagram of a transmission method in accordance with one embodiment of the present invention.

Figure 3A shows a flow chart of a transmission method in accordance with one embodiment of the present invention.

Figure 3B shows a flow chart of a transmission method in accordance with another embodiment of the present invention.

Figure 4A shows a schematic diagram of a transmission device in accordance with one embodiment of the present invention.

Figure 4B shows a schematic diagram of a transmission device in accordance with another embodiment of the present invention.

Figure 5A shows a schematic diagram of a serializer in accordance with one embodiment of the present invention.

Figure 5B shows a schematic diagram of a deserializer in accordance with one embodiment of the present invention.

detailed description

Hereinafter, various embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 shows a block diagram of a transmission system in accordance with one embodiment of the present invention. The transmission system 10 shown in Fig. 1 is applied to an image pickup apparatus T1 of a vehicle and an onboard computer T2. As shown in FIG. 1, transmission system 10 can include LVDS serializer 20, LVDS deserializer 30, and LVDS cable 40. Both the LVDS serializer 20 and the LVDS deserializer 30 are connected to the LVDS cable 40.

The LVDS serializer 20 is installed in the imaging device T1 of the vehicle, and can receive the video signal, the I2C signal and/or the CAN message generated by the imaging device T1, and convert the received video signal, I2C signal and/or CAN message into LVDS. The signals, as well as the converted LVDS signals, are transmitted via the LVDS cable 40.

The LVDS deserializer 30 is mounted in the onboard computer T2 of the vehicle, which can receive the LVDS signals transmitted via the LVDS cable 40, and convert the received LVDS signals into video signals, I2C signals, and/or CAN messages and provide Give the car computer T2.

Figure 2 shows a general flow diagram of a transmission method in accordance with one embodiment of the present invention. The transmission method shown in Fig. 2 will be described in detail below with reference to the transmission system shown in Fig. 1.

As shown in FIG. 2, at block 202, the LVDS serializer 20 can receive a video signal, an I2C signal, and/or a CAN message generated by the camera device T1 of the vehicle.

At block 204, LVDS serializer 20 may convert the received video signal, I2C signal, and/or CAN message to an LVDS signal, respectively. The LVDS signal may have a flag for indicating whether the information carried by it is a video signal, an I2C signal, or a CAN message. Here, the manner in which a CAN message is converted into an LVDS signal is similar to the manner in which an I2C signal is converted into an LVDS signal.

At block 206, the LVDS serializer 20 transmits the converted LVDS signal via the LVDS cable 40.

At block 208, the LVDS deserializer 30 can receive the LVDS signal transmitted by the LVDS serializer 20 from the LVDS cable 40.

At block 210, LVDS deserializer 30 may convert the received LVDS signal to obtain a video signal, an I2C signal, and/or a CAN message. The resulting video signal, I2C signal and/or CAN message is provided by the LVDS deserializer 30 to the onboard computer T2 of the vehicle.

As can be seen from the above description, this embodiment converts a CAN message into an LVDS signal and transmits it via an LVDS cable, and does not need to add an additional hardware device for transmitting a CAN message on the LVDS chip. Therefore, this embodiment can The LVDS chip is used to transmit CAN messages without increasing hardware costs.

In addition, since in this embodiment, it is not necessary to add an additional hardware device for transmitting CAN messages on the LVDS chip to transmit the CAN message using the LVDS chip, the present embodiment does not increase the area of the LVDS chip and volume.

Other variants

It will be understood by those skilled in the art that although in the above embodiments, the transmission of CAN messages by LVDS technology is implemented by converting CAN messages into LVDS signals and transmitting them via LVDS cables, the present invention is not limited to this. In other embodiments of the invention, such as, but not limited to, the LVDS technique may be modified such that it can transmit CAN messages via the LVDS cable in a manner that transmits CAN messages over the CAN bus, ie the LVDS technology is modified to have CAN The function of the transport protocol.

It will be understood by those skilled in the art that although in the above embodiment, the transmission system 10 is applied to an image pickup apparatus of a vehicle and an on-board computer, the present invention is not limited thereto. In other embodiments of the invention, transmission system 10 may be applied to any device of the vehicle or to other devices and/or systems other than the vehicle.

Figure 3A shows a flow chart of a transmission method in accordance with one embodiment of the present invention. The method 300 shown in FIG. 3A can be implemented, for example, by, for example, the LVDS serializer 20.

As shown in FIG. 3A, method 300 can include, at block 302, receiving a CAN message.

Method 300 can also include, at block 304, utilizing LVDS techniques to transmit signals related to the received CAN message.

In one aspect, block 304 can include converting the received CAN message to an LVDS signal and transmitting the converted LVDS signal via an LVDS cable.

In another aspect, block 304 can include transmitting the received CAN message via the LVDS cable in a manner that the CAN message is sent over the CAN bus.

Figure 3B shows a flow chart of a transmission method in accordance with another embodiment of the present invention. The method 350 shown in FIG. 3B can be implemented, for example, by, for example, the LVDS deserializer 30.

As shown in FIG. 3B, method 350 can include, at block 352, receiving a signal associated with a controller area network CAN message transmitted using low voltage differential signaling LVDS techniques.

The method 350 can also include, at block 354, obtaining the CAN message based on the received signal.

In one aspect, the received signal can be an LVDS signal converted by the CAN message, and block 354 can include converting the LVDS signal to the CAN message.

In another aspect, the received signal can be the CAN message.

Figure 4A shows a schematic diagram of a transmission device in accordance with one embodiment of the present invention. The transmission device 400 shown in FIG. 4A can be implemented in a combination of software, hardware, or both hardware and software, and is, for example, but not limited to, an LVDS serializer 20 or any other suitable device or the like can be installed.

As shown in FIG. 4A, the transmission device 400 can include a receiving module 402 and a transmission module 404. The receiving module 402 can be configured to receive a controller area network CAN message. Transmission module 404 can be used to transmit signals related to the CAN message using low voltage differential signaling LVDS techniques.

In one aspect, the transmission module 404 can include a conversion module for converting the CAN message into an LVDS signal, and a transmitting module for transmitting the converted LVDS signal via the LVDS cable.

In another aspect, the transmission module 404 can be further configured to: transmit the received CAN message via the LVDS cable in a manner to transmit the CAN message over the CAN bus.

Figure 4B shows a schematic diagram of a transmission device in accordance with another embodiment of the present invention. The transmission device 450 shown in FIG. 4B can be implemented in a combination of software, hardware, or both hardware and software, and can be installed, for example, but not limited to, in the LVDS deserializer 30 or any other suitable device or the like.

As shown in FIG. 4B, the transmission device 450 can include a receiving module 452 and an acquisition module 454. The receiving module 452 can be configured to receive signals related to the controller area network CAN message transmitted using the low voltage differential signaling LVDS technique. The obtaining module 454 can be configured to acquire the CAN message according to the received signal.

In one aspect, the received signal can be an LVDS signal converted by the CAN message, and the acquisition module 454 is further configured to convert the LVDS signal to the CAN message.

In another aspect, the received signal can be the CAN message.

Figure 5A shows a schematic diagram of a serializer in accordance with one embodiment of the present invention. As shown in FIG. 5A, the serializer 500 can include a processor 502 and a memory 504. Therein, the memory 504 stores executable instructions that, when executed, cause the processor 502 to perform the method 300 illustrated in FIG. 3A.

Figure 5B shows a schematic diagram of a deserializer in accordance with one embodiment of the present invention. As shown in FIG. 5B, the deserializer 550 can include a processor 552 and a memory 554. Therein, the memory 554 stores executable instructions that, when executed, cause the processor 552 to perform the method 350 illustrated in FIG. 3B.

Embodiments of the present invention also provide a machine readable storage medium storing executable instructions that, when executed, cause a machine to perform the method 300 illustrated in FIG. 3A or the method 350 illustrated in FIG. 3B.

It will be understood by those skilled in the art that the various embodiments of the present invention may be variously modified, modified and/or modified without departing from the spirit of the invention. Within the scope of protection. Accordingly, the scope of the invention is defined by the appended claims.

Claims

A transmission method comprising:

Receiving a controller area network CAN message;

The signal associated with the CAN message is transmitted using low voltage differential signaling LVDS techniques.
The method of claim 1 wherein said transmitting signal comprises:

Converting the CAN message to an LVDS signal;

The converted LVDS signal is transmitted via an LVDS cable.
The method of claim 1 wherein said transmitting signal comprises:

The received CAN message is transmitted via the LVDS cable in a manner that the CAN message is sent via the CAN bus.
A transmission method comprising:

Receiving signals related to controller area network CAN messages transmitted using low voltage differential signaling LVDS techniques;

The CAN message is obtained based on the received signal.
The method of claim 4, wherein

The received signal is an LVDS signal converted by the CAN message, and

The acquiring the CAN message includes converting the LVDS signal into the CAN message.
The method of claim 4, wherein

The received signal is the CAN message.
A transmission device comprising:

a receiving module, configured to receive a controller area network CAN message;

A transmission module for transmitting signals related to the CAN message using low voltage differential signaling LVDS techniques.
The transmission device of claim 7, wherein the transmission module comprises:

a conversion module for converting the CAN message into an LVDS signal;

And a sending module, configured to send the converted LVDS signal via the LVDS cable.
The transmission device according to claim 7, wherein

The transmission module is further configured to: transmit the received CAN message via the LVDS cable in a manner of transmitting the CAN message via the CAN bus.
A transmission device comprising:

a receiving module, configured to receive a signal related to a controller area network CAN message transmitted by using a low voltage differential signaling LVDS technology;

And an obtaining module, configured to acquire the CAN message according to the received signal.
The transmission device according to claim 10, wherein

The received signal is an LVDS signal converted by the CAN message, and

The obtaining module is further configured to: convert the LVDS signal into the CAN message.
A serializer that includes:

Processor;

A memory, which stores executable instructions that, when executed, cause the processor to perform the method of any of claims 1-3.
A deserializer, including:

Processor;

A memory, which stores executable instructions that, when executed, cause the processor to perform the method of any one of claims 4-6.
A machine readable storage medium storing executable instructions that, when executed, cause a machine to perform the method of any of claims 1-6.