WO2022205256A1

WO2022205256A1 - Data transmission method and apparatus

Info

Publication number: WO2022205256A1
Application number: PCT/CN2021/084798
Authority: WO
Inventors: 鲍鹏鑫
Original assignee: 华为技术有限公司
Priority date: 2021-03-31
Filing date: 2021-03-31
Publication date: 2022-10-06
Also published as: CN113287288B; CN113287288A

Abstract

Provided are a data transmission method and apparatus. The method comprises: acquiring a mapping relationship table including identification information of display devices, and information sink numbers (S201), wherein the identification information of each display device corresponds to one or more information sink numbers; converting a first data packet into a second data packet (S202), wherein the first data packet comprises DP data, the second data packet comprises identification information of a destination device, and a destination information sink number, and the destination information sink number is used for indicating the destination information sink of the second data packet; and sending the second data packet (S203). By using the present method, single-cable transmission of DP data can be realized, and the transmission distance of the DP data is increased.

Description

A method and device for data transmission

technical field

The present application belongs to the technical field of Internet of Vehicles communication, and in particular, relates to a method and device for data transmission.

Background technique

With the development of the automobile industry, there are more and more display screens in the car, and multiple display screens can obtain different display contents from the vehicle terminal and display them separately. The deployment rule of existing in-vehicle display screens is generally that the display screen is farther away from the vehicle terminal, and the distance between the display screens is relatively short. Therefore, multiple display screens can be linked by a daisy chain to greatly reduce the number of in-vehicle displays. the length of the cable. Currently, video transmission supports daisy-chain connection with Display Port (DP), which consists of a main channel (Main link), an auxiliary channel (AUX CH), and a hot plug detection channel (Hot Plug Detect). The main channel is one-way high-speed transmission, consisting of 4 pairs of wires, that is, 8 wires. In use, it can be configured as 1/2/4 pairs of wire transmission to carry audio and video services. The auxiliary channel is bidirectional low-speed transmission, consisting of 1 pair of wires or 2 wires, and is used to carry services such as link management and data management. The hot-plug detection channel is a one-way transmission signal composed of 1 wire, which is used for hot-plug detection.

Since DP needs 11 wires to complete the transmission, many cables are required, and the DP transmission distance is only 3 meters. In the vehicle scenario, it is desired to reduce the transmission cable and increase the transmission distance, so the existing DP transmission scheme cannot meet the requirements. The needs of in-vehicle scenarios.

SUMMARY OF THE INVENTION

The technical problem to be solved by the embodiments of the present application is to provide a data transmission method and device to solve the problem of more cables and shorter transmission distance.

In a first aspect, the embodiments of the present application provide a method for data transmission. The method is applied to a vehicle-mounted terminal, and may include:

The vehicle-mounted terminal obtains a mapping relationship table that includes the identification information of the display device and the number of the sink, wherein the identification information of each display device corresponds to one or more sink numbers;

Convert the first data packet into a second data packet, wherein the first data packet includes DP data, and the second data packet includes destination device identification information and a destination sink number, and the destination sink number is used to indicate the The destination destination of the second data packet;

The second data packet is sent.

By acquiring the mapping relationship table between the identification information of the display device and the number of the sink, the data packet can be converted between the vehicle terminal and the first display device, and the destination device identification information and the destination sink number can be added to the converted second data packet. , so that the destination address of the second data packet transmission can be determined according to the destination device identification information and the destination sink number, and the non-DP interface can be used to transmit DP data, which reduces the number of cables and increases the distance of data transmission.

In a possible implementation manner, the acquisition of the mapping relationship table containing the identification information of the display device and the number of the sink includes:

The on-board terminal broadcasts the first message and receives at least one response message, where the response message includes a set of mapping information consisting of one identification information and one or more sink numbers; or, the on-board terminal receives at least one report message, and the The above-mentioned report message includes a set of mapping information consisting of one identification information and one or more sink numbers;

The mapping relationship table is established according to the received one or more sets of mapping information.

A corresponding mapping relationship table can be established by acquiring the identification information and sink number of one or more display devices by responding to a message or reporting a message. The DP interface in the vehicle terminal determines the destination sink of the first data packet according to the mapping relationship table, and adds the destination device identification information and the destination sink number to the converted data packet, so that the DP data can be transmitted on the non-DP interface.

The in-vehicle terminal acquires the mapping relationship table from pre-stored data.

By maintaining the mapping relationship table in a pre-stored manner, the processing efficiency of the in-vehicle terminal is higher.

In a possible implementation manner, the identification information of the display device includes:

the MAC address of the transmission chip in the display device; or

the MAC address of the display device; or

Preset character or string.

In a possible implementation manner, the response message or the reporting message further includes Extended Display Identification Data (EDID) of the display device, and the mapping relationship table also includes the EDID of the display device .

The identification information of the display device and the information of the sink number can be combined in the existing message for transmitting the EDID information and transmitted together, which can realize the multiplexing of the existing message, reduce the modification of the existing message, and reduce the cost.

In a second aspect, an embodiment of the present application provides a data transmission method, the method is applied to a first display device, and the method includes:

receiving a second data packet, where the second data packet is converted from the first data packet, the first data packet includes DP data, and the second data packet includes destination device identification information and destination sink number;

Under the condition that the identification information of the destination device matches the identification information of the first display device, the second data packet is converted into a third data packet, and the type of the third data packet corresponds to the destination sink interface type;

sending the third data packet to the destination sink indicated by the destination sink number;

Under the condition that the identification information of the destination device does not match the identification information of the first display device, the second data packet is sent to the second display device.

It can be understood that the first display device may be directly connected to the second display device.

By comparing whether the identification information of the first display device matches the identification information of the destination device, the attribution of the second data packet can be determined, and when it is attributable to the first display device, the second data packet can be converted to the interface of the destination sink. The third packet received is supported. The DP data transmitted between the vehicle terminal and the first display device can be converted through the data packet, and the converted second data packet includes the destination device identification information and the destination sink number, so that the destination device identification information and the destination sink number can be used according to the destination device identification information. The number determines the destination address of the second data packet transmission, and the non-DP interface can be used to transmit DP data, which reduces the number of cables and increases the distance of data transmission.

In a possible implementation manner, the type of the third data packet includes any one of the following:

Support DP data packets of DP interface;

Support the eDP data package of the embedded display interface eDP;

Support to display DSI data packets of serial DSI interface;

oLDI data packets that support open low-voltage differential signaling oLDI interfaces.

In a possible implementation manner, the identification information of the first display device includes:

The MAC address of the transmission chip in the first display device; or

the MAC address of the first display device; or

Preset character or string.

In a third aspect, an embodiment of the present application provides a method for data transmission, which is applied to the first transmission chip, and may include:

The first transmission chip receives a first data packet, and the first data packet includes DP data;

Obtain the mapping relationship table between the identification information of the display device and the number of the sink, wherein the identification information of each display device corresponds to one or more number of sinks;

Converting the first data packet into a second data packet, where the second data packet includes destination device identification information and a destination sink number, wherein the destination sink number is used to indicate the destination sink of the second data packet;

The second data packet is sent.

The first transmission chip broadcasts the first message and receives at least one response message, where the response message includes a set of mapping information consisting of one identification information and one or more sink numbers; or, the vehicle-mounted terminal receives at least one report message , the reporting message includes a set of mapping information consisting of an identification information and one or more sink numbers;

In a possible implementation manner, the acquiring the mapping relationship table including the identification information of the display device and the number of the sink includes: the sending apparatus acquiring the mapping relationship table from pre-stored data.

In a possible implementation manner, the response message or the reporting message further includes extended display identification data EDID of the display device, and the mapping relationship table further includes the EDID of the display device.

the MAC address of the transmission chip in the display device; or

the MAC address of the display device; or

Preset character or string.

In a fourth aspect, an embodiment of the present application provides a method for data transmission, applied to a second transmission chip, which may include:

The second transmission chip receives a second data packet, the second data packet is converted from the first data packet, the first data packet includes DP data, and the second data packet includes the destination device identification information and the destination sink. Numbering;

Under the condition that the identification information of the destination device does not match the identification information of the first display device, the second data packet is sent to the third transmission chip in the second display device.

It can be understood that the second transmission chip may be located in the first display device and directly connected to the third transmission chip in the second display device. Further, the second transmission chip and the third transmission chip may have the same function and/or structure.

Support DP data packets of DP interface;

Support the eDP data package of the embedded display interface eDP;

Support to display DSI data packets of serial DSI interface;

The MAC address of the transmission chip in the first display device; or

the MAC address of the first display device; or

Preset character or string.

In a fifth aspect, an embodiment of the present application provides a device for data transmission, which may include:

a processing unit, configured to obtain a mapping relationship table containing the identification information of the display device and the number of the sinks, wherein the identification information of each display device corresponds to one or more sink numbers;

a transceiver unit, configured to send the second data packet.

In a possible implementation manner, the transceiver unit is specifically used for:

Broadcast the first message, and receive at least one response message, where the response message includes a set of mapping information consisting of one identification information and one or more sink numbers; or, the vehicle-mounted terminal receives at least one report message, and the report message includes A set of mapping information consisting of one identification information and one or more sink numbers;

The processing unit is specifically used for:

In a possible implementation manner, the processing unit is specifically used for:

The mapping relationship table is obtained from pre-stored data.

the MAC address of the transmission chip in the display device; or

the MAC address of the display device; or

Preset character or string.

In a possible implementation manner, the device is a vehicle-mounted terminal.

In a sixth aspect, an embodiment of the present application provides a device for data transmission, which may include:

a transceiver unit, configured to receive a second data packet, the second data packet is converted from the first data packet, the first data packet includes DP data, and the second data packet includes destination device identification information and destination sink number ;

A processing unit, configured to convert the second data packet into a third data packet under the condition that the identification information of the destination device matches the identification information of the first display device, the type of the third data packet corresponds to the interface type of the destination sink;

The transceiver unit is further configured to send the third data packet to the destination sink indicated by the destination sink number; and, under the condition that the destination device identification information does not match the identification information of the first display device , and send the second data packet to the second display device.

Support DP data packets of DP interface;

Support the eDP data package of the embedded display interface eDP;

Support to display DSI data packets of serial DSI interface;

In a possible implementation manner, the apparatus is a display device.

The MAC address of the transmission chip in the first display device; or

the MAC address of the first display device; or

Preset character or string.

In a seventh aspect, an apparatus is provided. The apparatus provided in the present application has the function of implementing the behavior of the vehicle-mounted terminal in the above method aspect, and includes means for executing the steps or functions described in the above method aspect. The steps or functions can be implemented by software, or by hardware (eg, circuits), or by a combination of hardware and software.

In one possible design, the apparatus described above includes one or more processors and communication units. The one or more processors are configured to support the apparatus to perform the corresponding functions of the in-vehicle terminal in the above method. For example, acquiring the mapping relationship table between the identification information of the display device and the number of the sink; converting the first data packet into the second data packet. The communication unit is used to support the communication between the apparatus and other devices, and realize the function of receiving and/or sending. For example, broadcasting the first message, receiving a response message or reporting message, sending the second data packet, and so on.

Optionally, the apparatus may further include one or more memories, which are coupled to the processor and store necessary program instructions and/or data for the apparatus. For example, a mapping relationship table may be stored, and the one or more memories may be integrated with the processor, or may be provided separately from the processor. This application is not limited.

The communication unit may be a transceiver, or a transceiver circuit. Optionally, the transceiver may also be an input/output circuit or an interface.

The device may also be a communication chip. The communication unit may be an input/output circuit or an interface of a communication chip.

In another possible design, the above device includes a processor, a memory and a bus. The processor is used to control the transceiver or the input/output circuit to send and receive signals, the memory is used to store a computer program, and the processor is used to execute the computer program in the memory, so that the apparatus performs the first aspect or any one of the first aspects. In the implementation manner, the vehicle-mounted terminal completes the method.

In an eighth aspect, an apparatus is provided. The apparatus provided by the present application has the function of implementing the behavior of the display device in the above method aspect, and includes means for performing the steps or functions described in the above method aspect. The steps or functions can be implemented by software, or by hardware (eg, circuits), or by a combination of hardware and software.

In one possible design, the apparatus described above includes one or more processors and communication units. The one or more processors are configured to support the apparatus to perform the corresponding functions of the display device in the above method. For example, when the destination device identification information contained in the received second data packet matches the identification information of the display device, the second data packet is converted into a third data packet. The communication unit is used to support the communication between the apparatus and other devices, and realize the function of receiving and/or sending. For example, receiving the second data packet, sending a response message or a report message, etc.

Optionally, the apparatus may further include one or more memories, which are coupled to the processor and store necessary program instructions and/or data for the apparatus. The one or more memories may be integrated with the processor, or may be provided separately from the processor. This application is not limited.

In another possible design, the above device includes a processor, a memory and a bus. The processor is used to control the transceiver or the input/output circuit to send and receive signals, the memory is used to store a computer program, and the processor is used to run the computer program in the memory, so that the apparatus performs the second aspect or any of the second aspects. In the implementation, the method completed by the display device is displayed.

In a ninth aspect, a system is provided, the system comprising the apparatus in the aforementioned fifth aspect and any possible design thereof, and/or the aforementioned apparatus in the sixth aspect and any possible design thereof; or, The system includes the apparatus of the aforementioned seventh aspect and any possible designs thereof, and/or the aforementioned apparatus of the eighth aspect and any possible designs thereof. For example, the system may include the above-mentioned vehicle-mounted terminal and at least one display device.

A tenth aspect provides a transmission chip, comprising:

a transceiver unit, configured to receive a first data packet, where the first data packet includes DP data;

A processing unit, used to obtain the mapping relationship table of the identification information of the display device and the number of the sinks, wherein the identification information of each display device corresponds to one or more sink numbers; convert the first data packet into a second data packet , the second data packet includes destination device identification information and a destination sink number, wherein the destination sink number is used to indicate the destination sink of the second data packet;

The transceiver unit is further configured to send the second data packet.

The processing unit is specifically configured to: establish the mapping relationship table according to the received one or more sets of mapping information.

The mapping relationship table is obtained from pre-stored data.

the MAC address of the transmission chip in the display device; or

the MAC address of the display device; or

Preset character or string.

In an eleventh aspect, a transmission chip is provided, including:

The transceiver unit is further configured to send the third data packet to the destination sink indicated by the destination sink number; and, under the condition that the destination device identification information does not match the identification information of the first display device , and send the second data packet to the third transmission chip in the second display device.

Support DP data packets of DP interface;

Support the eDP data package of the embedded display interface eDP;

Support to display DSI data packets of serial DSI interface;

The MAC address of the transmission chip in the first display device; or

the MAC address of the first display device; or

Preset character or string.

A twelfth aspect provides a transmission chip, comprising: a processor, a memory, an input interface, and an output interface, wherein the processor, the memory input interface, and the output interface are connected by a bus, wherein the input interface is used to receive data , the output interface is used to send data, the memory is used to store program codes, the processor is used to call the program codes stored in the memory, and execute the third aspect or any one of the possible implementations of the third aspect method described in.

A thirteenth aspect provides a transmission chip, comprising:

A processor, a memory, an input interface, and an output interface, the processor, the memory input interface, and the output interface are connected by a bus, wherein the input interface is used for receiving data, and the output interface includes a first interface for sending data to the sink. an output interface and a second output interface for sending data to another transmission chip; the memory is used for storing program codes, and the processor is used for calling the program codes stored in the memory to execute the fourth aspect or the first The method described in any one of the four possible implementations.

A fourteenth aspect provides a computer-readable storage medium for storing a computer program, the computer program comprising instructions for executing the method in the first aspect or any possible implementation manner of the first aspect, or the A computer program comprising instructions for performing the method of the second aspect or any of the possible implementations of the second aspect, or the computer program comprising instructions for performing the third aspect or any of the possible implementations of the third aspect Instructions for the method, or the computer program comprising instructions for performing the method of the fourth aspect or any of the possible implementations of the fourth aspect.

A fifteenth aspect provides a computer program product, the computer program product comprising: computer program code, when the computer program code is run on a computer, causing the computer to execute the first aspect or any one of the first aspects A method in a possible implementation manner, or causing a computer to execute the method in the above-mentioned second aspect or any one of the possible implementation manners of the second aspect, or causing a computer to perform the above-mentioned third aspect or any one of the possible implementation manners of the third aspect The method in the above fourth aspect or the method in any possible implementation manner of the fourth aspect is caused to the computer.

A sixteenth aspect provides a vehicle, the vehicle comprising the fifth to eighth aspects and the device of any one of possible implementations of the fifth to eighth aspects, or the system of the ninth aspect, or the tenth aspect A chip in any one possible implementation manner of the thirteenth aspect and the tenth aspect to the thirteenth aspect.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application or the background technology, the accompanying drawings required in the embodiments or the background technology of the present application will be described below.

FIG. 1 is a schematic diagram of the architecture of a vehicle-mounted communication system provided by an embodiment of the present application;

2 is a schematic flowchart of a method for data transmission provided by an embodiment of the present application;

3 is a schematic flowchart of another data transmission method provided by an embodiment of the present application;

FIG. 4 is a schematic diagram of the architecture of another vehicle-mounted communication system provided by an embodiment of the present application;

FIG. 5 is a schematic diagram of the composition of a data transmission apparatus provided by an embodiment of the present application;

6 is a schematic diagram of the composition of another apparatus for data transmission provided by an embodiment of the present application;

FIG. 7 is a schematic diagram of the composition of another apparatus for data transmission provided by an embodiment of the present application;

FIG. 8 is a schematic diagram of the composition of another apparatus for data transmission provided by an embodiment of the present application;

FIG. 9 is a schematic diagram of the composition of a transmission chip provided by an embodiment of the present application;

FIG. 10 is a schematic diagram of the composition of another transmission chip provided by an embodiment of the present application;

FIG. 11 is a schematic diagram of the composition of another transmission chip provided by an embodiment of the present application;

FIG. 12 is a schematic diagram of the composition of another transmission chip according to an embodiment of the present application.

Detailed ways

The embodiments of the present application will be described below with reference to the accompanying drawings in the embodiments of the present application.

The terms "comprising" and "having", and any variations thereof, in the description and claims of this application and the above figures are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but optionally also includes unlisted steps or units, or optionally also includes For other steps or units inherent to these processes, methods, products or devices.

Please refer to FIG. 1 , which is a schematic structural diagram of an in-vehicle communication system according to an embodiment of the present application. It includes a vehicle-mounted terminal 10 , a first display device 20 and a second display device 30 .

The in-vehicle terminal 10 may include an in-vehicle device, an in-vehicle device, or an in-vehicle terminal device, etc., and may include a signal source 11 and a first transmission chip 12 .

The information source 11 is called Stream Source in the DP protocol, and can be used to provide a data stream, such as audio data, video data or control data.

The first transmission chip 12 is connected to the source 11 through the DP interface (shown by the thick connecting line in FIG. 1 ), and can receive the DP data provided by the source 11, decapsulate the first data packet including the DP data, and add it to the destination device The identification information and the destination sink number are then repackaged into a second data packet that supports single-cable transmission. Then, it is sent to the first display device 20 through a single cable (shown as a thin connecting line in FIG. 1 ). Optionally, the type and format of the data may also be indicated in the second data packet, for example, audio data, video data, or control data.

The first display device 20 may be an in-vehicle display, which includes a second transmission chip 21 and a first sink 22 . The second transmission chip 21 is connected to the first transmission chip 12 through a single cable, and can be used to receive the second data packet sent by the first transmission chip 12 and determine whether the second data packet is based on the destination device identification information included in the second data packet. Data to be sent to the first display device 20 for display. When the destination device identification information matches the identification information of the first display device 20, the second data packet is converted into a third data packet corresponding to the interface type of the first sink 22, and then the third data packet is sent to the first sink. twenty two. When the identification information of the destination device is different from the identification information of the first display device 20 , the second data packet is sent to the directly connected second display device 30 .

The first sink 22 is called Stream Sink in the DP protocol, and can be used to receive a data stream. In the display device, after receiving the data stream, the first sink 22 can display the data, such as playing audio or video. When the data type is control data, the corresponding control command is executed according to the control data.

The composition of the third display device 30 is similar to that of the second display device 20 , including a third transmission chip 31 with the same function as the second transmission chip 21 , and a second sink 32 with the same function as the first sink 22 . It will not be repeated here.

It should be noted that, for simplicity of description, only two display devices are shown in FIG. 1 , and the data transmission method in this application can be applied to the scenario of one display device, and is also applicable to two or more display devices connected by a daisy chain. Scenario, this embodiment of the present application does not make any limitation. In addition, in the vehicle terminal, the number of sources can be one or more, and multiple sources share a DP interface; in the display device, the number of sinks can also be one or more, and multiple sinks can also share an interface. When data packets of multiple data streams need to be transmitted in the first transmission chip 22, they can be distinguished by adding the destination device identifier information to the destination sink number (which may be the same as or corresponding to the stream identifier).

The data transmission method applied in the above architecture is not only suitable for in-vehicle scenarios, but also for other scenarios where daisy-chain connections are used, such as multiple screen connections in a conference room, or multiple audio connections. It can also be applied to other non-daisy-chain connection scenarios that need to increase the number of cables or transmission distance. In the following, description is made by taking a vehicle scene as an example with reference to FIGS. 2 to 4 .

Please refer to FIG. 2, which is a schematic flowchart of a method for data transmission provided by an embodiment of the present application; applied to a vehicle-mounted terminal, including:

S201, acquiring a mapping relationship table including identification information of the display device and a number of a sink.

Wherein, the identification information of each display device corresponds to one or more sink numbers.

In a possible implementation manner, the identification information of the display device may be the MAC address of the transmission chip in the display device; or may be the MAC address of the display device; or may also be a preset character or character string.

When the MAC address of the transmission chip is used as the identification information, the transmission chip does not need to obtain the information from the display device, so it can be directly sent to the vehicle terminal as the destination address for sending data packets. When the MAC address or other information of the display device is used as the identification information, the transmission chip can first obtain the MAC address or other information of the display device and send it to the vehicle terminal, and at the same time store the above information itself. When the packet is sent, it can be matched with the destination device identification information in the data packet according to the stored information.

Taking the MAC address of the transmission chip in the display device as the identification information as an example, in a daisy-chain scenario or other scenarios, multiple display devices can be included, and each display device can have a set of mappings between the MAC address of the transmission chip and the number of the sink. relation. Therefore, the mapping relationship table may also include multiple sets of mapping relationships between MAC addresses and sink numbers. For example, the composition of the mapping relationship table can be as shown in Table 1:

Table 1

各个显示设备中传输芯片的MAC地址The MAC address of the transmission chip in each display device	与MAC地址具备映射关系的信宿编号The number of the sink that has a mapping relationship with the MAC address
MAC地址1MAC address 1	信宿1、信宿2、信宿3Sink 1, Sink 2, Sink 3
MAC地址2MAC address 2	信宿4、信宿5Sink 4, Sink 5

In the mapping relationship table, it indicates that there are currently two display devices, the MAC address of the transmission chip in the first display device is MAC address 1, and the first display device includes three sinks: sink 1, sink 2 and sink 3, The three sinks all have a mapping relationship with the MAC address 1 . The MAC address of the transmission chip in the second display device is MAC address 2 , and the second display device includes two sinks, sink 4 and sink 5 , both of which have a mapping relationship with MAC address 2 . When there is a third display device or more display devices, the mapping relationship between the MAC address of the transmission chip in the third display device and the sink number can be added to the above mapping relationship table.

The in-vehicle terminal can obtain the mapping table in the following ways:

In step S201, the vehicle-mounted terminal may broadcast the first message and receive at least one response message, where the response message includes a set of mapping information consisting of one identification information and one or more sink numbers; or, the vehicle-mounted terminal receives at least one a report message, the report message includes a set of mapping information consisting of an identification information and one or more sink numbers;

The in-vehicle terminal can actively send a broadcast message to request to obtain the above-mentioned information, or the display device can actively report the above-mentioned information. The broadcast message may be an existing message, such as a request message for obtaining an EDID, where the EDID contains parameters related to the display device and its performance, including supplier information, maximum image size, color settings, manufacturer presets, frequency Scope limits and strings that display device names and serial numbers, etc. At this time, the number of the sink can be sent as sub-information in the EDID information, and the identification information of the display device can be sent simultaneously as the information in parallel with the EDID; therefore, the response message or the report message can also include the EDID of the display device. , the mapping relationship table may also include the EDID of the display device. At this time, a column for storing the EDID of the display device may be added in Table 1, and each set of mapping relationships includes MAC address-sink number-EDID. Of course, the broadcast message may also be a newly constructed message, which is not limited here.

When acquiring the identification information and the sink number, for example, the number of display devices is two, the vehicle terminal can broadcast the first message to the two display devices, and if the display device has acquired its own identification information and sink number, it can reply In response to the message, the identification information and the sink number are sent to the vehicle terminal. If the display device has not acquired its own identification information and sink number, it can acquire the information within the timeout period and reply to the vehicle terminal through a response message. If a certain display device does not reply to the response message within the timeout period, the in-vehicle terminal may resend the broadcast message within a preset time, or temporarily stop sending data to the display device. The display device prompts the user with a reminder message, so that the user can perform maintenance in time.

In another way of acquiring the mapping relationship table, the mapping relationship table may be pre-stored on the vehicle-mounted terminal, and the vehicle-mounted terminal directly acquires the mapping relationship table from the memory and uses it.

S202, converting the first data packet into a second data packet, wherein the first data packet includes DP data, the second data packet includes destination device identification information and a destination sink number, and the destination sink number is used to indicate the destination sink of the second data packet.

After acquiring the mapping relationship table, the vehicle-mounted terminal can convert the first data packet including the DP data into the second data packet including the destination device identification information and the destination sink number. In this way, there is no need to transmit through the DP interface, and it is no longer limited by the large number of cables and the short transmission distance in the DP protocol. The display device to which the second data packet belongs can be indicated by the destination device identification information, and the destination sink of the second data packet can be indicated by further using the destination sink number.

S203. Send the second data packet.

As shown in FIG. 1 , the vehicle terminal is composed of a signal source 11 and a first transmission chip 12 . When the above method is executed, the main steps are completed by the first transmission chip 12 , which may specifically include receiving the first data packet of the signal source 11 first. , obtain the mapping relationship table, convert the first data packet into the second data packet, and send the second data packet. The first transmission chip 12 can realize the role of a sink agent by acquiring the mapping relationship table between the identification information of the display device and the number of the information sink. For the information source 11, the first transmission chip 12 belongs to a virtualized and contains one or more The virtual display device of the virtual sink, where the virtual sink corresponds to the sinks in all actual display devices one-to-one, the source 11 sends the first data packet including the DP data to the first transmission chip 12 through the DP interface, and passes The auxiliary channel in the DP protocol and the first transmission chip agree on a time slot for each virtual sink to receive data packets. When the first transmission chip 12 receives the data packet in the appointed time slot, it can determine which virtual sink the data packet is sent to according to the appointed time slot, so as to further determine the destination sink of the data packet, and then pass The mapping relationship table completes the destination agent, and the non-DP interface transmission of DP data can be completed by adding the destination device identification information and the destination sink number to the converted data packet.

In the embodiment of the present application, by acquiring the mapping relationship table between the identification information of the display device and the number of the sink, the on-board terminal and the first display device can be converted into the second data packet after the conversion through the conversion of the data packet, adding the purpose Device identification information and destination sink number, so that the destination address of the second data packet transmission can be determined according to the destination device identification information and destination sink number, and the non-DP interface can be used to transmit DP data, reducing the number of cables and improving data. transmission distance.

Referring to FIG. 3, another method for data transmission provided by an embodiment of the present application, applied to the first display device 20, includes:

S301. Receive a second data packet, where the second data packet is converted from the first data packet, the first data packet includes DP data, and the second data packet includes destination device identification information and destination sink number.

For the description of converting the first data packet into the second data packet, the identification information of the destination device, and the number of the destination sink, reference may be made to the previous description of S202, which will not be repeated here.

S302, under the condition that the identification information of the destination device matches the identification information of the first display device, convert the second data packet into a third data packet, and the type of the third data packet corresponds to the The interface type of the destination sink.

The interface types of the destination sink include DP interface, Embedded Display Port (eDP for short), Display Serial Interface (DSI for short), Open Low Voltage Differential Signaling Display Interface for short oLDI) interface, etc., therefore the type of the third data packet includes any of the following:

Support DP data packets of DP interface;

Support the eDP data package of the embedded display interface eDP;

Support to display DSI data packets of serial DSI interface;

S303: Send the third data packet to the destination sink indicated by the destination sink number.

Optionally, the second data packet further includes data stream attribute information (Stream Attribute), and before sending the third data packet to the destination sink according to the destination sink number, the method further includes:

The first display acquires the data stream attribute information included in the second data packet, and sends it to the destination sink. The data stream attribute information can be used to indicate the bit rate, resolution and other information of the video data.

Another case in parallel with S302-S303 also includes:

S304, under the condition that the identification information of the destination device does not match the identification information of the first display device, send the second data packet to the second display device.

As shown in FIG. 1 , the first display device 20 is composed of a second transmission chip 21 and a first sink 22. When the above method is executed, the main steps are completed by the second transmission chip 21. Specifically, it may include receiving a second data packet, then Whether the second data packet belongs to the first display device 20 is determined according to whether the identification information of the destination device matches the identification information of the first display device, and when the identification information matches, the second data packet is converted into a third data packet and sent to the destination destination such as The first sink 22. When the identification information does not match, the second data packet is forwarded to the third transmission chip 31 in the directly connected second display device 30 . The second transmission chip 21 in the first display device 20 can function as a source agent by comparing it with the identification information of the destination device and obtaining the number of the destination sink. The second transmission chip 21 and the first transmission chip 12 and the second transmission chip 21 and the third transmission chip 31 do not need to be connected through the DP interface, and the DP data transmission can be completed through the destination device identification information and the destination sink number. .

In this embodiment of the present application, by comparing whether the identification information of the first display device matches the identification information of the destination device, the attribution of the second data packet can be determined, and when belonging to the first display device, the second data packet can be Converted to the third data packet received by the interface of the destination sink. The DP data transmitted between the vehicle terminal and the first display device can be converted through the data packet, and the converted second data packet includes the destination device identification information and the destination sink number, so that the destination device identification information and the destination sink number can be used according to the destination device identification information. The number determines the destination address of the second data packet transmission, and the non-DP interface can be used to transmit DP data, which reduces the number of cables and increases the distance of data transmission.

It should be noted that when the interface type of the destination sink is a DP interface or an eDP interface, the system architecture can be seen in Figure 1. When the interface type of the destination sink is a DSI or oLDI interface, the third data packet passes through the DSI or oLDI interface. interface transfer. For details, reference may be made to FIG. 4 , which is a schematic structural diagram of another vehicle-mounted communication system provided by an embodiment of the present application. Wherein, when the first transmission chip 12 actively broadcasts the first message to obtain information such as the identification information of the first display device 20 and the number of the sink, the first transmission chip 12 also includes an integrated circuit bus (Inter-integrated Circuit, referred to as I ² C) Main control module. The first transmission chip 12 can obtain the above information through I ² C; when the second transmission chip 21 actively reports the above information, the second transmission chip 21 also includes an I ² C main control module, which can pass the I ² C to obtain information such as the number of the sink, and report it to the first transmission chip together with the identification information of the first display device 20 .

Please refer to FIG. 5, which is a schematic diagram of the composition of a data transmission apparatus provided by an embodiment of the present application; including:

A processing unit 100, configured to obtain a mapping relationship table that includes the identification information of the display device and the number of the sinks, wherein the identification information of each display device corresponds to one or more sink numbers;

The transceiver unit 200 is configured to send the second data packet.

Optionally, the transceiver unit 200 is specifically configured to:

The processing unit 100 is specifically configured to: establish the mapping relationship table according to one or more groups of received mapping information.

Optionally, the processing unit 100 is specifically configured to:

The mapping relationship table is obtained from pre-stored data.

Optionally, the MAC address of the transmission chip in the display device; or

the MAC address of the display device; or

Preset character or string.

For concepts related to the technical solutions provided by the embodiments of the present application involved in the device, for explanations and detailed descriptions and other steps, please refer to the description of the vehicle-mounted terminal in the foregoing method or other embodiments, which will not be repeated here.

Please refer to FIG. 6, which is a schematic diagram of the composition of another apparatus for data transmission provided by an embodiment of the present application; including:

Processor 110 , memory 120 and transceiver 130 . The processor 110, the memory 120 and the transceiver 130 are connected through the bus 140, the memory 120 is used for storing instructions, and the processor 110 is used for executing the instructions stored in the memory 120, so as to realize the execution of the on-board terminal in the method corresponding to FIG. 2 above. step.

The processor 110 is configured to execute the instructions stored in the memory 120 to control the transceiver 130 to receive and transmit signals, and to complete the steps performed by the vehicle-mounted terminal in the above method. The memory 120 may be integrated in the processor 110 , or may be provided separately from the processor 110 .

As an implementation manner, the function of the transceiver 130 may be implemented by a transceiver circuit or a dedicated chip for transceiver. The processor 110 can be considered to be implemented by a dedicated processing chip, a processing circuit, a processor or a general-purpose chip.

As another implementation manner, a general-purpose computer may be used to implement the terminal provided by the embodiments of the present application. The program codes that will implement the functions of the processor 110 and the transceiver 130 are stored in the memory 120 , and a general-purpose processor implements the functions of the processor 110 and the transceiver 130 by executing the codes in the memory 120 .

As another form of this embodiment, a computer-readable storage medium is provided, on which an instruction is stored, and when the instruction is executed, the method on the vehicle terminal side in the above method embodiment is executed.

As another form of this embodiment, a computer program product including an instruction is provided, and when the instruction is executed, the method on the vehicle terminal side in the above method embodiment is executed.

Please refer to FIG. 7 , which is a schematic diagram of the composition of a data transmission apparatus provided by an embodiment of the present application; including:

The transceiver unit 300 is configured to receive a second data packet, where the second data packet is converted from the first data packet, the first data packet includes DP data, and the second data packet includes destination device identification information and destination sink. Numbering;

The processing unit 400 is configured to convert the second data packet into a third data packet under the condition that the identification information of the destination device matches the identification information of the first display device, and the type of the third data packet is the interface type corresponding to the destination sink;

The transceiver unit 300 is further configured to send the third data packet to the destination sink indicated by the destination sink number; and, in the condition that the destination device identification information does not match the identification information of the first display device Next, send the second data packet to the second display device.

Optionally, the type of the third data packet includes any one of the following:

Support DP data packets of DP interface;

Support the eDP data package of the embedded display interface eDP;

Support to display DSI data packets of serial DSI interface;

Optionally, the identification information of the first display device includes:

The MAC address of the transmission chip in the first display device; or

the MAC address of the first display device; or

Preset character or string.

For concepts related to the technical solutions provided by the embodiments of the present application, explanations and detailed descriptions and other steps involved in the apparatus refer to the description of the first display device in the foregoing method or other embodiments, which will not be repeated here.

Please refer to FIG. 8 , which is a schematic diagram of the composition of another apparatus for data transmission provided by an embodiment of the present application; as shown in FIG. 8 , the apparatus may include a processor 210 , a memory 220 and a transceiver 230 . The processor 210, the memory 220 and the transceiver 230 are connected through the bus 240, the memory 220 is used for storing instructions, and the processor 210 is used for executing the instructions stored in the memory 220, so as to realize the first display device in the method corresponding to FIG. 3 above. steps to perform.

The processor 210 is configured to execute the instructions stored in the memory 220 to control the transceiver 230 to receive and transmit signals, and to complete the steps performed by the first display device in the above method. The memory 220 may be integrated in the processor 210, or may be provided separately from the processor 210.

As an implementation manner, the function of the transceiver 230 may be implemented by a transceiver circuit or a dedicated chip for transceiver. The processor 210 can be considered to be implemented by a dedicated processing chip, a processing circuit, a processor or a general-purpose chip.

As another implementation manner, a general-purpose computer may be used to implement the terminal provided by the embodiments of the present application. The program codes that will implement the functions of the processor 210 and the transceiver 230 are stored in the memory 220 , and a general-purpose processor implements the functions of the processor 210 and the transceiver 230 by executing the codes in the memory 220 .

As another form of this embodiment, a computer-readable storage medium is provided, on which an instruction is stored, and when the instruction is executed, the method on the first display device side in the above method embodiment is executed.

As another form of this embodiment, a computer program product including an instruction is provided, and when the instruction is executed, the method on the side of the first display device in the above method embodiment is executed.

Please refer to FIG. 9 , which is a schematic diagram of the composition of a transmission chip provided by an embodiment of the present application; including:

a transceiver unit 500, configured to receive a first data packet, where the first data packet includes DP data;

The processing unit 600 is used to obtain the mapping relationship table of the identification information of the display device and the number of the sinks, wherein the identification information of each display device corresponds to one or more sink numbers; the first data packet is converted into the second data packet, the second data packet includes destination device identification information and a destination sink number, wherein the destination sink number is used to indicate the destination sink of the second data packet;

The transceiver unit 500 is further configured to send the second data packet.

Optionally, the transceiver unit 500 is specifically configured to:

The processing unit 600 is specifically configured to: establish the mapping relationship table according to one or more groups of received mapping information.

Optionally, the processing unit 600 is specifically configured to:

The mapping relationship table is obtained from pre-stored data.

Optionally, the MAC address of the transmission chip in the display device; or

the MAC address of the display device; or

Preset character or string.

Optionally, one or more sinks are included in a single display device.

For the concepts related to the technical solutions provided by the embodiments of the present application involved in the transmission chip, please refer to the description of the first transmission chip in the foregoing method or other embodiments for explanations and detailed descriptions and other steps, which will not be repeated here.

Please refer to FIG. 10, which is a schematic diagram of the composition of another transmission chip provided by an embodiment of the present application; including:

The processor 310, the memory 320, the input interface 330 and the output interface 340, the processor 310, the memory 320, the input interface 330 and the output interface 340 are connected by the bus 350, wherein the input interface 330 is used for receiving data, which can is a DP interface, and the output interface 340 is used for sending data, which may be a non-DP interface supporting single-cable transmission. The memory 320 is used to store a set of program codes, and the processor 310 is used to call the program codes stored in the memory 320 to implement the steps performed by the first transmission chip in the method corresponding to FIG. 2 above.

The processor 310 is configured to execute the instructions stored in the memory 320 to control the input interface 330 to receive data and control the output interface 340 to send data, so as to complete the steps performed by the first transmission chip in the above method. The memory 320 may be integrated in the processor 310 , or may be provided separately from the processor 310 .

As an implementation manner, the functions of the input interface 330 or the output interface 340 can be considered to be implemented by a transceiver circuit or a dedicated chip for transceiver. The processor 310 can be considered to be implemented by a dedicated processing chip, a processing circuit, a processor or a general-purpose chip.

Please refer to FIG. 11 , which is a schematic diagram of the composition of another transmission chip provided by an embodiment of the present application; including:

The transceiver unit 700 is configured to receive a second data packet, the second data packet is converted from the first data packet, the first data packet includes DP data, and the second data packet includes destination device identification information and destination sink. Numbering;

The processing unit 800 is configured to convert the second data packet into a third data packet under the condition that the identification information of the destination device matches the identification information of the first display device, and the type of the third data packet is the interface type corresponding to the destination sink;

The transceiver unit 700 is further configured to send the third data packet to the destination sink indicated by the destination sink number; and, in the condition that the destination device identification information does not match the identification information of the first display device Next, the second data packet is sent to the third transmission chip in the second display device.

Support DP data packets of DP interface;

Support the eDP data package of the embedded display interface eDP;

Support to display DSI data packets of serial DSI interface;

The MAC address of the transmission chip in the first display device; or

the MAC address of the first display device; or

Preset character or string.

For the concepts related to the technical solutions provided by the embodiments of the present application involved in the transmission chip, please refer to the description of the second transmission chip in the foregoing method or other embodiments for explanations and detailed descriptions and other steps, which will not be repeated here.

Please refer to FIG. 12 , which is a schematic diagram of the composition of another transmission chip provided by an embodiment of the present application; including:

The processor 410, the memory 420, the input interface 430 and the output interface 440 (including the first output interface 441 and the second output interface 442), the processor 410, the memory 420, the input interface 430 and the output interface 440 are connected through the bus 450, Wherein, the input interface 430 is used to receive data, which may be a non-DP interface supporting single-cable transmission, the output interface 440 is used to send data, and the output interface 440 includes a first interface for sending data to the sink. An output interface 441 and a second output interface 442 for sending data to another transmission chip; the first output interface 441 can be a DP interface/eDP interface/DSI interface/oLDI interface of the same type as the destination sink interface, and the second output interface 442 is a non-DP interface that supports single-cable transmission. The memory 420 is used to store a set of program codes, and the processor 410 is used to call the program codes stored in the memory 420 to implement the steps performed by the second transmission chip in the method corresponding to FIG. 3 above.

The processor 410 is configured to execute the instructions stored in the memory 420 to control the input interface 430 to receive data and control the output interface 440 to send data, so as to complete the steps performed by the first transmission chip in the above method. The memory 420 may be integrated in the processor 410, or may be provided separately from the processor 410.

As an implementation manner, the functions of the input interface 430 or the first output interface 441 or the second output interface 442 can be considered to be implemented by a transceiver circuit or a dedicated chip for transceiver. The processor 410 may be considered to be implemented by a dedicated processing chip, a processing circuit, a processor or a general-purpose chip.

Those skilled in the art can understand that, for the convenience of description, only one memory and one processor are shown in FIG. 6 , FIG. 8 , FIG. 10 and FIG. 12 . In an actual controller, there may be multiple processors and memories. The memory may also be referred to as a storage medium or a storage device, etc., which is not limited in this embodiment of the present application.

An embodiment of the present application further provides a vehicle, which may include a data transmission device as in any of the embodiments corresponding to FIG. 5 to FIG. 8 , or a data transmission device as in any of the embodiments corresponding to FIG. 9 to FIG. 12 . chip. It can be understood that the vehicles in the embodiments of the present application may be "cars", "vehicles" and "vehicles" or other similar terms including general motor vehicles, such as cars, SUVs, MPVs, buses, trucks and other vehicles. Cargo or passenger vehicles, watercraft including various ships and boats, and aircraft, including hybrid vehicles, electric vehicles, fuel vehicles, plug-in hybrid vehicles, fuel cell vehicles and other alternative fuel vehicles. Wherein, a hybrid vehicle refers to a vehicle having two or more power sources, and an electric vehicle includes a pure electric vehicle, an extended-range electric vehicle, etc., which is not specifically limited in this application.

It should be understood that, in this embodiment of the present application, the processor may be a central processing unit (Central Processing Unit, referred to as CPU), and the processor may also be other general-purpose processors, digital signal processors (Digital Signal Processing, referred to as DSP), Application Specific Integrated Circuit (ASIC), Field-Programmable Gate Array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc.

It should also be understood that the memory mentioned in the embodiments of the present invention may be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. Among them, the non-volatile memory may be a read-only memory (Read-Only Memory, referred to as ROM), a programmable read-only memory (Programmable ROM, referred to as PROM), an erasable programmable read-only memory (Erasable PROM, referred to as EPROM) , Electrically Erasable Programmable Read-Only Memory (Electrically EPROM, EEPROM for short) or flash memory. The volatile memory may be Random Access Memory (RAM for short), which is used as an external cache memory. By way of example but not limitation, many forms of RAM are available, such as Static Random Access Memory (SRAM), Dynamic RAM (DRAM), Synchronous DRAM, referred to as SDRAM), double data rate synchronous dynamic random access memory (Double Data Rate SDRAM, referred to as DDR SDRAM), enhanced synchronous dynamic random access memory (Enhanced SDRAM, referred to as ESDRAM), synchronous connection dynamic random access memory (Synchlink DRAM, referred to as SLDRAM) and direct memory bus random access memory (Direct Rambus RAM, referred to as DR RAM).

It should be noted that when the processor is a general-purpose processor, DSP, ASIC, FPGA or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components, the memory (storage module) is integrated in the processor.

It should be noted that the memory described herein is intended to include, but not be limited to, these and any other suitable types of memory.

In addition to the data bus, the bus may also include a power bus, a control bus, a status signal bus, and the like. However, for the sake of clarity, the various buses are labeled as buses in the figure.

It should also be understood that the first, second, third, fourth and various numeral numbers mentioned herein are only for the convenience of description, and are not used to limit the scope of the present application.

It should be understood that the term "and/or" in this document is only an association relationship to describe associated objects, indicating that there can be three kinds of relationships, for example, A and/or B, which can mean that A exists alone, and A and B exist at the same time , there are three cases of B alone. In addition, the character "/" in this document generally indicates that the related objects are an "or" relationship.

In the implementation process, each step of the above-mentioned method can be completed by a hardware integrated logic circuit in a processor or an instruction in the form of software. The steps of the methods disclosed in conjunction with the embodiments of the present application may be directly embodied as executed by a hardware processor, or executed by a combination of hardware and software modules in the processor. The software modules may be located in random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, registers and other storage media mature in the art. The storage medium is located in the memory, and the processor reads the information in the memory, and completes the steps of the above method in combination with its hardware. To avoid repetition, detailed description is omitted here.

According to the method provided by the embodiment of the present application, the embodiment of the present application further provides a system, which includes the aforementioned vehicle-mounted terminal, at least one display device, and the like.

In various embodiments of the present application, the size of the sequence numbers of the above-mentioned processes does not mean the sequence of execution, and the execution sequence of each process should be determined by its functions and internal logic, rather than the implementation process of the embodiments of the present application. constitute any limitation.

Those of ordinary skill in the art can realize that various illustrative logical blocks (ILBs) and steps described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. accomplish. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functionality using different methods for each particular application, but such implementations should not be considered beyond the scope of this application.

In the several embodiments provided in this application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the apparatus embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not implemented. On the other hand, the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit.

In the above-mentioned embodiments, it may be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented in software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of the present application are generated. The computer may be a general purpose computer, special purpose computer, computer network, or other programmable device. The computer instructions may be stored in or transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions may be downloaded from a website site, computer, server or data center Transmission to another website site, computer, server, or data center by wire (eg, coaxial cable, optical fiber, digital subscriber line) or wireless (eg, infrared, wireless, microwave, etc.). The computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that includes an integration of one or more available media. The usable media may be magnetic media (eg, floppy disks, hard disks, magnetic tapes), optical media (eg, DVDs), or semiconductor media (eg, solid state drives), and the like.

The above are only specific embodiments of the present application, but the protection scope of the present application is not limited to this. should be covered within the scope of protection of this application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

A method for data transmission, characterized in that the method is applied to a vehicle-mounted terminal, and the method comprises:

Obtain a mapping relationship table containing the identification information of the display device and the number of the sink, wherein the identification information of each display device corresponds to one or more number of sinks;

Convert the first data packet into a second data packet, wherein the first data packet includes DP data, and the second data packet includes destination device identification information and a destination sink number, and the destination sink number is used to indicate the The destination destination of the second data packet;

The second data packet is sent.
The method according to claim 1, wherein the acquiring the mapping table containing the identification information of the display device and the number of the sink includes:

The on-board terminal broadcasts the first message and receives at least one response message, where the response message includes a set of mapping information consisting of one identification information and one or more sink numbers; or, the on-board terminal receives at least one report message, and the The above-mentioned report message includes a set of mapping information consisting of one identification information and one or more sink numbers;

The mapping relationship table is established according to the received one or more sets of mapping information.
The method according to claim 1, wherein the acquiring the mapping table containing the identification information of the display device and the number of the sink includes:

The in-vehicle terminal acquires the mapping relationship table from pre-stored data.
The method according to any one of claims 1-3, wherein the identification information of the display device comprises:

the MAC address of the transmission chip in the display device; or

the MAC address of the display device; or

Preset character or string.
A method for data transmission, characterized in that the method is applied to a first display device, and the method comprises:

receiving a second data packet, where the second data packet is converted from the first data packet, the first data packet includes DP data, and the second data packet includes destination device identification information and destination sink number;

Under the condition that the identification information of the destination device matches the identification information of the first display device, the second data packet is converted into a third data packet, and the type of the third data packet corresponds to the destination sink interface type;

sending the third data packet to the destination sink indicated by the destination sink number;

Under the condition that the identification information of the destination device does not match the identification information of the first display device, the second data packet is sent to the second display device.
The method according to claim 5, wherein the type of the third data packet includes any one of the following:

Support DP data packets of DP interface;

Support the eDP data package of the embedded display interface eDP;

Support to display DSI data packets of serial DSI interface;

oLDI data packets that support open low-voltage differential signaling oLDI interfaces.
The method according to claim 5 or 6, wherein the identification information of the first display device comprises:

The MAC address of the transmission chip in the first display device; or

the MAC address of the first display device; or

Preset character or string.
A method for data transmission, characterized in that, applied to a first transmission chip, comprising:

The first transmission chip receives a first data packet, and the first data packet includes DP data;

Obtain a mapping relationship table containing the identification information of the display device and the number of the sink, wherein the identification information of each display device corresponds to one or more number of sinks;

Converting the first data packet into a second data packet, where the second data packet includes destination device identification information and a destination sink number, wherein the destination sink number is used to indicate the destination sink of the second data packet;

The second data packet is sent.
The method according to claim 8, wherein the acquiring a mapping relationship table including the identification information of the display device and the number of the sink includes:

The first transmission chip broadcasts the first message and receives at least one response message, where the response message includes a set of mapping information consisting of one identification information and one or more sink numbers; or, the vehicle-mounted terminal receives at least one report message , the reporting message includes a set of mapping information consisting of an identification information and one or more sink numbers;

The mapping relationship table is established according to the received one or more sets of mapping information.
The method according to claim 8, wherein the acquiring a mapping relationship table including the identification information of the display device and the number of the sink includes:

The sending device acquires the mapping relationship table from pre-stored data.
The method according to any one of claims 8-10, wherein the identification information of the display device comprises:

the MAC address of the transmission chip in the display device; or

the MAC address of the display device; or

Preset character or string.
A method for data transmission, characterized in that, applied to a second transmission chip, comprising:

The second transmission chip receives a second data packet, the second data packet is converted from the first data packet, the first data packet includes DP data, and the second data packet includes the destination device identification information and the destination sink. Numbering;

Under the condition that the identification information of the destination device matches the identification information of the first display device, the second data packet is converted into a third data packet, and the type of the third data packet corresponds to the destination sink interface type;

sending the third data packet to the destination sink indicated by the destination sink number;

Under the condition that the identification information of the destination device does not match the identification information of the first display device, the second data packet is sent to the third transmission chip in the second display device.
The method according to claim 12, wherein the type of the third data packet includes any one of the following:

Support DP data packets of DP interface;

Support the eDP data package of the embedded display interface eDP;

Support to display DSI data packets of serial DSI interface;

oLDI data packets that support open low-voltage differential signaling oLDI interfaces.
The method according to claim 12 or 13, wherein the identification information of the first display device comprises:

The MAC address of the transmission chip in the first display device; or

the MAC address of the first display device; or

Preset character or string.
A device for data transmission, comprising:

a processing unit, configured to obtain a mapping relationship table containing the identification information of the display device and the number of the sinks, wherein the identification information of each display device corresponds to one or more sink numbers;

Convert the first data packet into a second data packet, wherein the first data packet includes DP data, and the second data packet includes destination device identification information and a destination sink number, and the destination sink number is used to indicate the The destination destination of the second data packet;

a transceiver unit, configured to send the second data packet.
The device according to claim 15, wherein the transceiver unit is specifically configured to:

Broadcast the first message, and receive at least one response message, where the response message includes a set of mapping information consisting of one identification information and one or more sink numbers; or, the vehicle-mounted terminal receives at least one report message, and the report message includes A set of mapping information consisting of one identification information and one or more sink numbers;

The processing unit is specifically configured to: establish the mapping relationship table according to one or more groups of received mapping information.
The apparatus according to claim 15, wherein the processing unit is specifically configured to:

The mapping relationship table is obtained from pre-stored data.
The apparatus according to claim 16, wherein the identification information of the display device comprises:

the MAC address of the transmission chip in the display device; or

the MAC address of the display device; or

Preset character or string.
The device according to any one of claims 15-18, wherein the device is a vehicle-mounted terminal.
A device for data transmission, comprising:

a transceiver unit, configured to receive a second data packet, the second data packet is converted from the first data packet, the first data packet includes DP data, and the second data packet includes destination device identification information and destination sink number ;

A processing unit, configured to convert the second data packet into a third data packet under the condition that the identification information of the destination device matches the identification information of the first display device, the type of the third data packet corresponds to the interface type of the destination sink;

The transceiver unit is further configured to send the third data packet to the destination sink indicated by the destination sink number; and, under the condition that the destination device identification information does not match the identification information of the first display device , and send the second data packet to the second display device.
The apparatus according to claim 20, wherein the type of the third data packet includes any one of the following:

Support DP data packets of DP interface;

Support the eDP data package of the embedded display interface eDP;

Support to display DSI data packets of serial DSI interface;

oLDI data packets that support open low-voltage differential signaling oLDI interfaces.
The apparatus according to claim 20, wherein the identification information of the first display device comprises:

The MAC address of the transmission chip in the first display device; or

the MAC address of the first display device; or

Preset character or string.
The apparatus according to any one of claims 20-22, wherein the apparatus is a display device.
A transmission chip, characterized in that it includes:

a transceiver unit, configured to receive a first data packet, where the first data packet includes DP data;

A processing unit, used to obtain the mapping relationship table of the identification information of the display device and the number of the sinks, wherein the identification information of each display device corresponds to one or more sink numbers; convert the first data packet into a second data packet , the second data packet includes destination device identification information and a destination sink number, wherein the destination sink number is used to indicate the destination sink of the second data packet;

The transceiver unit is further configured to send the second data packet.
The transmission chip according to claim 24, wherein the transceiver unit is specifically used for:

Broadcast the first message, and receive at least one response message, where the response message includes a set of mapping information consisting of one identification information and one or more sink numbers; or, the vehicle-mounted terminal receives at least one report message, and the report message includes A set of mapping information consisting of one identification information and one or more sink numbers;

The processing unit is specifically configured to: establish the mapping relationship table according to one or more groups of received mapping information.
The transmission chip according to claim 24, wherein the processing unit is specifically used for:

The mapping relationship table is obtained from pre-stored data.
The transmission chip according to claim 25, wherein the identification information of the display device comprises:

the MAC address of the transmission chip in the display device; or

the MAC address of the display device; or

Preset character or string.
A transmission chip, characterized in that it includes:

a transceiver unit, configured to receive a second data packet, the second data packet is converted from the first data packet, the first data packet includes DP data, and the second data packet includes destination device identification information and destination sink number ;

A processing unit, configured to convert the second data packet into a third data packet under the condition that the identification information of the destination device matches the identification information of the first display device, the type of the third data packet corresponds to the interface type of the destination sink;

The transceiver unit is further configured to send the third data packet to the destination sink indicated by the destination sink number; and,

Under the condition that the identification information of the destination device does not match the identification information of the first display device, the second data packet is sent to the third transmission chip in the second display device.
The transmission chip according to claim 28, wherein the type of the third data packet includes any one of the following:

Support DP data packets of DP interface;

Support the eDP data package of the embedded display interface eDP;

Support to display DSI data packets of serial DSI interface;

oLDI data packets that support open low-voltage differential signaling oLDI interfaces.
The transmission chip according to claim 28 or 29, wherein the identification information of the first display device comprises:

The MAC address of the transmission chip in the first display device; or

the MAC address of the first display device; or

Preset character or string.
A device for data transmission, comprising:

a processor, a memory, a transceiver and a bus, the processor, the memory and the transceiver are connected by a bus, wherein the memory is used to store program codes, the transceiver is used to send and receive signals, and the processor is used to call the Program code stored in the memory to perform the method of any one of claims 1-4.
A computer-readable storage medium, comprising:

The computer-readable storage medium has stored therein instructions which, when executed on a computer, implement the method of any one of claims 1-4.
A device for data transmission, comprising:

a processor, a memory, a transceiver and a bus, the processor, the memory and the transceiver are connected by a bus, wherein the memory is used to store program codes, the transceiver is used to send and receive signals, and the processor is used to call the Program code stored in the memory to perform the method of any one of claims 5-7.
A computer-readable storage medium, comprising:

The computer-readable storage medium stores instructions that, when executed on a computer, implement the method of any one of claims 5-7.
A transmission chip, characterized in that it includes:

a processor, a memory, an input interface and an output interface, the processor, memory, input interface and output interface are connected by a bus, wherein the input interface is used for receiving data, the output interface is used for sending data, the memory For storing program codes, the processor is configured to call the program codes stored in the memory to execute the method according to any one of claims 8-11.
A transmission chip, characterized in that it includes:

A processor, a memory, an input interface, and an output interface, the processor, memory, input interface, and output interface are connected by a bus, wherein the input interface is used for receiving data, and the output interface includes a A first output interface and a second output interface for sending data to another transmission chip; the memory is used for storing program codes, and the processor is used for calling the program codes stored in the memory, and executes the process as claimed in claim 12- The method of any one of 14.
A system for data transmission, comprising:

The device of any one of claims 15-19, and the device of any one of claims 20-23;

Alternatively, a transmission chip as claimed in any one of claims 24-27, and a transmission chip as claimed in any one of claims 28-30.
A vehicle, characterized by comprising: the device as claimed in any one of claims 15-23, or the transmission chip as claimed in any one of claims 24-30, or the device as claimed in claim 37 system.