A vehicle-mounted network communication method for high-speed optical fiber transmission

Abstract

The present invention provides a vehicle-mounted network communication method for high-speed optical fiber transmission, including: the main controller communicates with the regional optical gateway in the vehicle-mounted network node through an optical fiber; the main controller transmits an optical control signal and an optical data signal, and the regional optical gateway controls and processes the optical data signal according to the optical control signal; the optical control signal and the optical data signal are transmitted through different optical channels, the optical data signal is transmitted through one or more optical data channels, and the optical data channels are divided into multiple data time slices during transmission; when the optical control signal reaches the regional optical gateway, the regional optical gateway obtains a copy of the optical control signal through an optical coupler and analyzes and processes the copy of the optical control signal. At the same time, the optical control signal continues to be transmitted forward through the optical coupler. The present invention controls the corresponding data time slices through the optical control signal to perform corresponding operations, thereby realizing high-bandwidth transmission and real-time communication of the entire vehicle-mounted network.

Description

Technical Field

[0001] The present invention relates to the field of intelligent vehicle communication, and particularly to a vehicle network communication method with high-speed optical fiber transmission. Background Art

[0002] In recent years, with the continuous development of automotive technology, users' demands for vehicle intelligence, automation, and networking have also been continuously increasing. Without a doubt, vehicles with good user experience will win the favor of car buyers, prompting automobile manufacturers to continuously add new services to meet users' needs. The implementation of continuously increasing services requires a large number of ECUs to be installed in the vehicle to complete preset functions. These ECUs will increase the number of network ports and the amount of data transmitted in the vehicle. The massive data transmission makes the traditional in-vehicle communication bus unable to meet the requirements.

[0003] At present, although the in-vehicle Ethernet bus has been applied for data transmission in the vehicle, the transmission bandwidth of the in-vehicle Ethernet bus is still 100 Mbps, and the maximum transmission does not exceed 1 Gbps. Its transmission medium still uses copper. However, with the comprehensive development of ADAS, autonomous driving, and in-vehicle entertainment, more sensors are required to receive more and more low-latency and deterministic data transmissions, high-resolution video traffic transmissions, and faster wireless connection technologies such as 5G enable intelligent vehicles to exchange sensor and control information with each other, etc., resulting in an explosive growth in the communication bandwidth requirements of the vehicle network. This makes the current 1 Gbps in-vehicle Ethernet transmission bandwidth difficult to meet the increasing transmission requirements of vehicle network data. Therefore, in order to support a higher transmission bandwidth and make up for the drawbacks of the existing in-vehicle Ethernet using unshielded copper twisted pair for data transmission, there is an urgent need for a new communication method to meet the high-bandwidth and real-time data transmission in existing vehicle communications. Summary of the Invention

[0004] Based on one of the defects existing in the prior art, the present invention provides a vehicle network communication method with high-speed optical fiber transmission, which at least includes:

[0005] The main controller communicates with the regional optical gateway in the vehicle network node through an optical fiber;

[0006] The main controller transmits an optical control signal and an optical data signal, and the regional optical gateway controls and processes the optical data signal according to the optical control signal;

[0007] The optical control signal and the optical data signal are transmitted through different optical channels, and the optical data signal is transmitted through one or more optical data channels;

[0008] The regional optical gateway uses a modulation and detection optical circuit to read and update the optical data signal in the optical data channel;

[0009] When the optical control signal arrives at the regional optical gateway, the regional optical gateway obtains a copy of the optical control signal through the optical coupler and analyzes and processes the copy of the optical control signal. At the same time, the optical control signal continues to be transmitted forward through the optical coupler.

[0010] A vehicle network communication method for high-speed fiber-optic transmission. Further optionally, the optical data channel is divided into fixed-length or variable-length data time slices;

[0011] If there are corresponding preset operations set according to the optical control signal in the regional optical network node for the corresponding data time slice, the regional optical network node updates the gateway configuration so that the upcoming data time slice is forwarded or input to the modulation and detection optical circuit for signal processing.

[0012] A vehicle network communication method for high-speed fiber-optic transmission. Further optionally, the optical control signal at least includes:

[0013] The first control function signal. The regional optical gateway selected by the main controller can receive the signal from the main controller in the matching data time slice;

[0014] The second control function signal. The regional optical gateway selected by the main controller can send the optical data signal to the main controller in the matching data time slice;

[0015] The third control function signal. The matching data slice is not used.

[0016] A vehicle network communication method for high-speed fiber-optic transmission. Further optionally, when the optical control signal received by the regional optical gateway is the first control function signal, the regional optical gateway obtains the matching data time slice for the first control function signal and obtains the optical data signal sent by the main controller from the matching data time slice;

[0017] The regional optical gateway converts the optical data signal into an electrical signal through the modulation and optical detection circuit and then sends it to the target ECU.

[0018] A vehicle network communication method for high-speed fiber-optic transmission. Further optionally, the main controller transmits the optical control signal at least through the first optical fiber; the main controller transmits the optical control signal at least through the second optical fiber.

[0019] A vehicle network communication method for high-speed fiber-optic transmission. Further optionally, when the main controller needs to send data to the ECU that transmits based on different communication protocols, after the main controller encapsulates the electrical data signal using the corresponding protocol according to the protocol transmission configuration file, it is transmitted using the wavelength matching the corresponding protocol;

[0020] Each type of wavelength transmits data of one protocol.

[0021] A vehicle network communication method for high-speed fiber optic transmission. Further optionally, when transmitting data packets of multiple different communication protocols, each protocol uses an independent optical channel for transmission;

[0022] The transmission wavelengths of each optical channel are different.

[0023] A vehicle network communication method for high-speed fiber optic transmission. Further optionally, when the regional optical gateway extracts the required optical data signal from the matching data time slice according to the control optical signal, it converts the required optical data signal into an electrical signal;

[0024] After the regional optical gateway converts the optical signal into an electrical signal, it selects the communication protocol corresponding to the wavelength and forwards the corresponding electrical signal to the corresponding ECU.

[0025] A vehicle network communication method for high-speed fiber optic transmission. Further optionally, in the main controller, the in-vehicle Ethernet protocol data packet uses a wavelength of 650nm, with an error range of plus or minus 10nm;

[0026] The CAN protocol uses a wavelength of 660nm, with an error range of plus or minus 10nm;

[0027] The LIN protocol uses a wavelength of 670nm, with an error range of plus or minus 10nm.

[0028] A vehicle network communication method for high-speed fiber optic transmission. Further optionally, when the optical control signal received by the regional optical gateway is the second control function signal, the regional optical gateway obtains the matching data time slice in the second control function signal. The regional optical gateway converts the data that needs to be uploaded to the main controller in the connected ECU into an optical signal through the modulation and optical detection circuit and transmits it into the optical fiber within the matching data time slice.

[0029] A vehicle network communication method for high-speed fiber optic transmission. Further optionally, when a regional optical gateway needs to exchange information with other regional optical gateways, the regional optical gateway that needs to send information first sends the optical data signal to the main controller, and the main controller sends it to the corresponding regional optical gateway in the next cycle.

[0030] A vehicle network communication method for high-speed fiber optic transmission. Further optionally, in the optical data channel, a safety time slice is set between each time slice. The safety time is used to protect the optical data signal being transmitted and for switching between different data time slices.

[0031] A vehicle network communication method for high-speed fiber optic transmission. Further optionally, when the optical control signal received by the regional optical gateway is the third control function signal, the regional optical gateway obtains the matching data time slice in the third control function signal, and the regional optical gateway does not perform any operation on the matching data time slice.

[0032] A vehicle network communication method for high-speed fiber optic transmission. Further optionally, there are at least two or more regional optical gateways. Among them, when the number of regional optical gateways is three, the positions of the regional optical gateways are respectively set at the front, middle, and rear positions of the vehicle body;

[0033] Or when the number of regional optical gateways is four, the positions of the regional optical gateways are respectively set at the left front, right front, left rear, and right rear positions of the vehicle body;

[0034] The ECU of the vehicle network is connected to the regional optical gateway closest to it.

[0035] A vehicle network communication method for high-speed fiber optic transmission. Further optionally, each data time slice is allocated for data transmission of the regional optical gateway of the node of the backbone network;

[0036] The main controller determines and controls the allocation of data time slices to the regional optical gateway. The main controller notifies the regional network node about the allocation of data time slices by sending an optical control signal on the control channel before sending the relevant data time slice.

[0037] Beneficial effects:

[0038] In the technical solution provided by the present invention, an optical control signal and an optical data signal are generated by the main controller and independently transmitted respectively. In the regional optical gateway, the optical control signal is used to operate the optical data signal. And during transmission, in each transmission cycle, the optical data channel is divided into multiple different data time slices, and the corresponding data time slice is controlled by the optical control signal to perform corresponding operations, thereby realizing high-bandwidth transmission and real-time communication of the entire vehicle network.

[0039] In addition, in this embodiment, multiple different optical data channels are used for transmission, and each optical channel uses different wavelengths to transmit corresponding protocols, avoiding the delay caused by converting multiple different communication protocols into a unified protocol for transmission in the prior art and then converting back to the corresponding protocol after receiving the unified protocol, and improving real-time performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The following drawings only illustrate and explain the present invention and do not limit the scope of the present invention.

[0041] Figure 1 It is a schematic diagram of a vehicle network of a regional centralized EE architecture for high-speed fiber optic transmission according to an embodiment of the present invention.

[0042] Figure 2 It is a schematic diagram of the process of the main controller transmitting optical data according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0043] For a clearer understanding of the technical features, objectives, and effects of this article, the specific embodiments of the present invention will now be described with reference to the accompanying drawings. The same reference numerals in each figure represent the same parts. To simplify the drawings, only the parts related to the present invention are schematically shown in each figure, and they do not represent the actual structure of the product. Additionally, for the sake of simplicity and ease of understanding of the drawings, in some figures, only one of the components with the same structure or function is schematically shown, or only one of them is labeled.

[0044] Regarding control systems, functional modules, and application programs (APPs), those skilled in the art are familiar with the fact that they can be in any suitable form, either hardware or software, either discrete multiple functional modules or multiple functional units integrated onto one piece of hardware. In the simplest form, the control system can be a controller, such as a combinational logic controller, a microprogram controller, etc., as long as it can implement the operations described in this application. Of course, the control system can also be integrated into a physical device as different modules, and these do not deviate from the basic principles and protection scope of the present invention.

[0045] In the present invention, "connection" can include direct connection, indirect connection, communication connection, and electrical connection, unless otherwise specifically stated.

[0046] The terms used in this article are only for the purpose of describing specific embodiments and are not intended to limit this disclosure. As used herein, the singular forms "a", "an", and "the" are also intended to include the plural forms, unless the context clearly dictates otherwise. It will also be understood that when used in the specification, the terms "comprises" and / or "comprising" mean the presence of the stated features, values, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, values, steps, operations, elements, components, and / or groups thereof. As used herein, the term "and / or" includes any and all combinations of one or more of the listed related items.

[0047] It should be understood that the term "vehicle" or "vehicular" or other similar terms used herein generally include motor vehicles, such as passenger cars including sport utility vehicles (SUVs), buses, trucks, various commercial vehicles, vessels including various boats and ships, aircraft, etc., and include hybrid vehicles, electric vehicles, plug-in hybrid electric vehicles, hydrogen-powered vehicles, and other alternative fuel vehicles (e.g., fuels derived from non-petroleum energy sources). As mentioned herein, a hybrid vehicle is a vehicle with two or more power sources, such as a vehicle with both gasoline power and electric power.

[0048] In addition, the controller of the present disclosure can be embodied as a non-transitory computer-readable medium on a computer-readable medium, which contains executable program instructions executed by a processor, a controller, or the like. Examples of computer-readable media include, but are not limited to, ROM, RAM, compact disc (CD)-ROM, magnetic tape, floppy disk, flash drive, smart card, and optical data storage devices. The computer-readable recording medium can also be distributed in computer systems coupled through a network, such that the computer-readable medium is stored and executed in a distributed manner, for example, through a telematics server or a controller area network (CAN).

[0049] The present invention provides a vehicle network communication method for high-speed optical fiber transmission, which is applied to a centralized EE architecture in a vehicle. Figure 1 and Figure 2 as shown.

[0050] Specifically, in the existing vehicle network architecture, the main domain controller is mainly connected to the ECUs belonging to it, and the domain controller controls the subordinate ECUs. The domain controllers communicate with each other through a backbone network, which can improve the safety level and unified management.

[0051] However, there are some problems with this solution in the prior art. Since the vehicle body is relatively long, the distance between the domain controller and the ECUs of the domain is far, resulting in too long wiring harnesses, causing too high vehicle costs and increased weight. To solve this problem in this embodiment, a centralized architecture based on a regional optical gateway is adopted. Specifically, regional optical gateways are set in different regions of the vehicle body, and each ECU only needs to be connected to the regional optical gateway closest to it;

[0052] The regional optical gateways are connected through optical fiber as the backbone network;

[0053] The regional optical gateway is controlled by a main controller, and the main controller can be configured as a central computing platform;

[0054] In the prior art, for optical fiber used for communication transmission, the control signal and the data signal are usually transmitted together, and then identified through the identification code after parsing. And as for optical fiber communication, it is not currently used in vehicles, but only in network communication, such as the home broadband. The reason is that the environmental requirements for vehicle communication are relatively strict. On the one hand, the vehicle optical fiber needs to embed the wiring harness into the vehicle body, and the optical fiber should have limited bending resistance;

[0055] On the other hand, the operating temperature of the vehicle is required to be between -40° and 105°, and the existing optical fiber network transmission technology is not suitable for use in vehicles.

[0056] In the vehicle network communication method provided in this embodiment, in order to improve the transmission rate of large traffic, reduce the transmission delay, and improve the real-time performance, the method specifically includes at least:

[0057] The main controller communicates with the regional optical gateway in the vehicle network node via optical fiber;

[0058] The main controller transmits optical control signals and optical data signals, and the regional optical gateway controls and processes the optical data signals according to the optical control signals;

[0059] The optical control signals and the optical data signals are transmitted through different optical channels, and the optical data signals are transmitted through one or more optical data channels;

[0060] The regional optical gateway uses modulation and detection optical circuits to read and update the optical data signals in the optical data channels;

[0061] When the optical control signal arrives at the regional optical gateway, the regional optical gateway obtains a copy of the optical control signal through an optical coupler and analyzes and processes the copy of the optical control signal. At the same time, the optical control signal continues to be transmitted forward through the optical coupler.

[0062] In this embodiment, the optical control signals and the optical data signals are separated, and the two are transmitted independently and through different optical channels respectively;

[0063] The optical control signals are transmitted through only one optical channel;

[0064] The optical data signals can be transmitted through one or more optical channels;

[0065] The optical control signals are generated by the main controller. The main controller transmits all the optical control signals to the regional optical gateway through one optical channel. The main controller is transmitted to the optical fiber coupler set by the regional optical gateway through optical fiber. In order to quickly transmit the optical controller signals, the regional optical gateway directly copies a copy of the optical control signal for processing. The optical control signals sent by the main controller are directly transmitted to the next regional optical gateway through the optical fiber coupler set by the regional optical gateway. Through the above design, there is no pause when the optical control signals are transmitted. In the transmission process of the prior art, first, the optical data needs to be converted into an electrical signal by the regional optical gateway, and then after analyzing the electrical signal to obtain useful information, the remaining signals are converted into optical signals and then transmitted. However, in this embodiment, in order to reduce latency and improve the real-time performance of the system, the main controller generates all the optical control signals. For example, if the main controller generates 10 optical controller signals, the first to fifth optical control signals are for the regional optical gateway, the sixth to ninth optical control signals are for regional optical gateway 2, and the tenth optical control signal is for regional optical gateway 3;

[0066] After passing through the regional optical gateway, the total amount of 10 optical controller signals remains unchanged. After receiving the optical control signal, the regional optical gateway continues to transmit it forward through the optical coupler. At the same time, after parsing the copied copy, only the signals associated with itself are acquired, and the irrelevant signals are discarded.

[0067] In this way, the optical controller signals are transmitted without staying, reducing latency.

[0068] Specifically, in order to facilitate the control of optical data signals, the following method is adopted in this embodiment:

[0069] The optical data channel is divided into fixed-length or variable-length data time slices;

[0070] If there are corresponding preset operations set according to the optical control signal in the regional optical network node for the corresponding data time slice, the regional optical network node updates the gateway configuration so that the upcoming data time slice is forwarded or input to the modulation and detection optical circuit for signal processing;

[0071] Specifically, the optical control signal is defined in this embodiment:

[0072] The optical control signal at least includes:

[0073] The first control function signal. The regional optical gateway selected by the master controller can receive signals from the master controller at the matching data time slice;

[0074] The second control function signal. The regional optical gateway selected by the master controller can send optical data signals to the master controller at the matching data time slice;

[0075] The third control function signal. The matching data slice is not used.

[0076] Process the optical data signal according to the function of the optical control signal.

[0077] As Figure 1 shown, in the vehicle-mounted network structure diagram of the regional centralized EE architecture with high-speed fiber optic transmission, one master controller plus three regional optical gateways are adopted, and two independent optical paths are used. The first optical path is dedicated to transmitting optical control signals, and the second optical path is dedicated to transmitting optical data signals.

[0078] Each regional optical gateway is connected to the ECU closest to it. The ECU can have different types of protocol interfaces, such as ECU1, ECU2, and ECU3 are respectively the in-vehicle Ethernet interface ECU, CAN interface ECU, and LIN interface ECU;

[0079] ECU4, ECU5, and ECU6 are respectively the in-vehicle Ethernet interface ECU, CAN interface ECU, and MOST interface ECU;

[0080] ECU7, ECU8, and ECU9 are respectively the in-vehicle Ethernet interface ECU, the CAN interface ECU, and the FlexRay interface ECU;

[0081] The optical transmission path of the main controller first passes through Area Optical Gateway 1, then through Area Optical Gateway 2, and after passing through Area Optical Gateway 3, it returns to the main controller.

[0082] Specifically, in the prior art, the control signal and the data signal are randomly generated and can be generated at various stages, such as at the area gateway. In this embodiment, the main controller generates the control signal and the corresponding data time slice of the control signal at the information generation stage, that is, the data time slice is only generated by the main controller together with the control signal in each cycle period.

[0083] Specifically, the modulation and optical detection circuit can be configured as a circuit and device with the functions of an optical emission module and an optical reception module.

[0084] As shown in Figure 2, the main controller generates an optical control channel and multiple optical data channels. In the optical data channels, each transmission cycle is divided into different data time slices, and each data time slice corresponds to the optical data of an optical control channel. LD to LD5 are laser light sources for converting electrical signals into optical signals. The wavelengths of the laser light sources can be the same or different. In different optical data channels, the wavelengths of the laser light sources are different.

[0085] The light source of the optical control signal can have the same wavelength as one of the light sources of the optical data channels.

[0086] For example: After the main controller generates data and sends it to the area optical gateway, and then passes through multiple different area optical gateways and returns to the main controller, it forms a cycle period.

[0087] At the beginning of each cycle period, the main controller generates a control signal and a data time slice;

[0088] No new control signals and data time slices are generated at the area optical gateway.

[0089] The main controller generates a control signal and a data time slice, and defines the corresponding data time slice in the optical control signal and performs corresponding data operations within the data time slice;

[0090] Specifically, the area optical gateway operates on the optical data signal in the matching data time slice according to the received optical control signal, which is reflected in at least one or all of the following aspects:

[0091] The optical control signal received by the area optical gateway is the first control function signal. The area optical gateway acquires the matching data time slice for the first control function signal, and obtains the optical data signal sent by the master controller from the matching data time slice;

[0092] The area optical gateway converts the optical data signal into an electrical signal through the modulation and optical detection circuit and then sends it to the target ECU.

[0093] The optical control signal received by the area optical gateway is the second control function signal. The area optical gateway acquires the matching data time slice for the second control function signal. The area optical gateway converts the data that needs to be uploaded to the master controller in the connected ECU into an optical signal through the modulation and optical detection circuit and then transmits it into the optical fiber within the matching data time slice.

[0094] The optical control signal received by the area optical gateway is the third control function signal. The area optical gateway acquires the matching data time slice for the third control function signal, and the area optical gateway does not perform any operation on the matching data time slice.

[0095] To reduce latency, this embodiment provides one of the feasible real-time methods. The master controller transmits through two optical fibers respectively, and the data is connected to different interfaces;

[0096] Specifically, the master controller transmits the optical control signal through at least the first optical fiber; the master controller transmits the optical control signal through at least the second optical fiber.

[0097] The first optical fiber is directly connected to the optical fiber coupler provided in the area optical gateway;

[0098] The second optical fiber is directly connected to the modulation and optical detection circuit provided in the area optical gateway;

[0099] Specifically, in this embodiment, since each different protocol in automotive communication has its own characteristics and there are different protocols in the communication system, in the existing communication benchmarks, when transmitting different protocols through optical fibers, all protocols are uniformly converted into the same protocol data packets and then forwarded. Although this method is feasible, protocol conversion and unpacking take time, which will cause an increase in latency. Because the unified standard protocol is converted during transmission at the sending end, and the standard protocol is parsed at the receiving end.

[0100] To solve this problem, the following method is adopted in this embodiment:

[0101] When the master controller needs to send data to the ECU that transmits based on different communication protocols, the master controller encapsulates the electrical data signal using the corresponding protocol according to the protocol transmission configuration file, and then transmits it using the wavelength matching the corresponding protocol;

[0102] Each wavelength of a category transmits data of one protocol;

[0103] When transmitting data packets of multiple different communication protocols, each protocol uses an independent optical channel for transmission;

[0104] The transmission wavelengths of each optical channel are different.

[0105] Specifically, there are multiple different protocols in the in-vehicle network, such as CAN protocol, LIN protocol, FlexRay protocol, and MOST protocol.

[0106] Different wavelength bands can be selected for transmission according to different protocols;

[0107] Specifically, in optical communication, there are errors in the manufacturing of light sources with the same wavelength. In order to overcome the influence of manufacturing errors in this embodiment, the errors in the transmission of each wavelength are controlled. Specifically, it can be plus or minus 2 - 10 nm. In this embodiment, plus or minus 10 nm is selected, which can reduce the manufacturing process difficulty.

[0108] In this embodiment, visible light is used for transmission. For example, red light, blue light, and green light can be used for transmission;

[0109] In a feasible embodiment, a wavelength band of 650 nm of a red light source is used for transmission, and a POF optical fiber is used as the transmission medium;

[0110] Data packets of the in-vehicle Ethernet protocol use a wavelength of 650 nm, and the error range is plus or minus 10 nm;

[0111] The CAN protocol uses a wavelength of 660 nm, and the error range is plus or minus 10 nm;

[0112] The LIN protocol uses a wavelength of 670 nm, and the error range is plus or minus 10 nm.

[0113] The FlexRay protocol uses a wavelength of 680 nm, and the error range is plus or minus 10 nm.

[0114] The MOST protocol uses a wavelength of 640 nm, and the error range is plus or minus 10 nm.

[0115] It should be noted that the above is only a feasible wavelength embodiment scheme. In fact, the following can also be adopted: in the wavelength bands of 640 nm, 650 nm, 660 nm, 670 nm, and 680 nm, the in-vehicle Ethernet protocol, CAN protocol, MOST protocol, LIN protocol, and FlexRay protocol can also be randomly matched, which does not affect the implementation of the solution of the present invention.

[0116] Specifically, each data time slice is allocated for data transmission between the area optical gateway of the node and the backbone network;

[0117] The main controller determines and controls the allocation of data time slices to the regional optical gateways. The main controller notifies the regional optical gateway nodes about the allocation of data time slices by sending optical control signals on the control channel before sending the relevant data time slices.

[0118] Specifically, in this embodiment based on a centralized regional architecture, the regional optical gateways are set at preset positions on the vehicle body, and can be specifically set as follows:

[0119] There are at least two or more regional optical gateways. Among them, there are 2 regional optical gateways, and their positions are respectively set at the front and rear positions of the vehicle body;

[0120] When the number of regional optical gateways is three, their positions are respectively set at the front, middle, and rear positions of the vehicle body;

[0121] Or when the number of regional optical gateways is four, their positions are respectively set at the left front, right front, left rear, and right rear positions of the vehicle body;

[0122] The ECU of the in-vehicle network is connected to the regional optical gateway closest to it.

[0123] The above are only the preferred embodiments of the present invention, and the present invention is not limited to the above embodiments. Those skilled in the art can clearly understand that the form in this embodiment is not limited to this, and the adjustable methods are not limited to this. It can be understood that other improvements and changes directly derived or associated by those skilled in the art without departing from the basic concept of the present invention should be considered to be included within the protection scope of the present invention.

Claims

1. A vehicle-mounted network communication method for high-speed optical fiber transmission, characterized in that, At least include: The main controller communicates with the regional optical gateway in the vehicle network node through optical fiber; The main controller transmits optical control signals and optical data signals, and the regional optical gateway controls and processes the optical data signals according to the optical control signals; The optical control signals and the optical data signals are transmitted through different optical channels, and the optical data signals are transmitted through one or more optical data channels; The regional optical gateway uses a modulation and detection optical circuit to read and update the optical data signals in the optical data channels; When the optical control signal reaches the regional optical gateway, the regional optical gateway obtains a copy of the optical control signal through an optical coupler and analyzes and processes the copy of the optical control signal. At the same time, the optical control signal continues to be transmitted forward through the optical coupler.

2. The vehicle-mounted network communication method for high-speed optical fiber transmission according to claim 1, characterized in that, The optical data channels are divided into fixed-length or variable-length data time slices; If a corresponding preset operation is set in the regional optical network node according to the optical control signal for the corresponding data time slice, the regional optical network node updates the gateway configuration so that the upcoming data time slice is forwarded or input to the modulation and detection optical circuit for signal processing.

3. The vehicle-mounted network communication method for high-speed optical fiber transmission according to claim 1, wherein, The optical control signal at least includes: The first control function signal, and the regional optical gateway selected by the main controller can receive the signal from the main controller in the matching data time slice; The second control function signal, and the regional optical gateway selected by the main controller can send optical data signals to the main controller in the matching data time slice; The third control function signal, and the matching data time slice is not used.

4. The on-vehicle network communication method for high-speed optical fiber transmission according to claim 1, characterized in that, When the optical control signal received by the regional optical gateway is the first control function signal, the regional optical gateway obtains a matching data time slice for the first control function signal and obtains the optical data signal sent by the main controller from the matching data time slice; The regional optical gateway converts the optical data signal into an electrical signal through a modulation and optical detection circuit and then sends it to the target ECU.

5. The vehicle-mounted network communication method for high-speed optical fiber transmission according to claim 1, characterized in that The main controller transmits the optical control signal at least through the first optical fiber; the main controller transmits the optical control signal at least through the second optical fiber.

6. The on-vehicle network communication method for high-speed optical fiber transmission according to claim 1, characterized in that, When the main controller needs to send data to an ECU that transmits based on different communication protocols, after the main controller encapsulates the electrical data signal according to the protocol transmission configuration file using the corresponding protocol, it transmits it using a wavelength matching the corresponding protocol; Each type of wavelength transmits data of one protocol.

7. The vehicle-mounted network communication method for high-speed optical fiber transmission according to claim 1, characterized in that, When transmitting data packets of multiple different communication protocols, each protocol is transmitted through an independent optical channel; The transmission wavelengths of each optical channel are different.

8. The vehicle-mounted network communication method for high-speed optical fiber transmission according to claim 2, characterized in that, When the regional optical gateway extracts the required optical data signal from the selected matching data time slice according to the optical control signal, it converts the required optical data signal into an electrical signal; After the regional optical gateway converts the optical signal into an electrical signal, it selects the communication protocol corresponding to the wavelength and forwards the corresponding electrical signal to the corresponding ECU.

9. The on-vehicle network communication method for high-speed optical fiber transmission according to claim 1, characterized in that When in the main controller, the in-vehicle Ethernet protocol data packet uses a wavelength of 650 nm, and the error range is plus or minus 10 nm; The CAN protocol uses a wavelength of 660 nm, and the error range is plus or minus 10 nm; The LIN protocol uses a wavelength of 670 nm, and the error range is plus or minus 10 nm.

10. The vehicle-mounted network communication method for high-speed optical fiber transmission according to claim 1, characterized in that, The optical control signal received by the area optical gateway is the second control function signal. The area optical gateway obtains the matching data time slice for the second control function signal. The area optical gateway converts the data that needs to be uploaded to the main controller in the connected ECU into an optical signal through the modulation and optical detection circuit and transmits it to the optical fiber within the matching data time slice.

11. The on-vehicle network communication method for high-speed optical fiber transmission according to claim 1, characterized in that When an area optical gateway needs to exchange information with other area optical gateways, the area optical gateway that needs to send information first sends the optical data signal to the main controller, and the main controller sends it to the corresponding area optical gateway in the next cycle.

12. The vehicle-mounted network communication method for high-speed optical fiber transmission according to claim 2, characterized in that, In the optical data channel, a safety time slice is set between each time slice. The safety time is used to protect the optical data signal being transmitted and for switching between different data time slices.

13. The vehicle-mounted network communication method for high-speed optical fiber transmission according to claim 2, characterized in that, The optical control signal received by the area optical gateway is the third control function signal. The area optical gateway obtains the matching data time slice for the third control function signal. The area optical gateway does not perform any operation on the matching data time slice.

14. The vehicle-mounted network communication method for high-speed optical fiber transmission according to claim 2, characterized in that, There are at least two or more area optical gateways. Among them, when the number of area optical gateways is three, the positions of the area optical gateways are respectively set at the front, middle, and rear positions of the vehicle body; Or when the number of area optical gateways is four, the positions of the area optical gateways are respectively set at the left front, right front, left rear, and right rear positions of the vehicle body; The ECU of the in-vehicle network is connected to the area optical gateway closest to it.

15. The vehicle-mounted network communication method for high-speed optical fiber transmission according to claim 1, characterized in that, Each data time slice is allocated for the data transmission of the area optical gateway of the backbone network node; The main controller determines and controls the allocation of data time slices to the area optical gateways. The main controller notifies the area network node about the allocation of data time slices by sending an optical control signal on the control channel before sending the relevant data time slice.

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