Electric vehicle domain control communication architecture and communication method

Abstract

The invention provides an electric vehicle domain control communication architecture and a communication method, and solves the technical problem that the existing domain control scheme is incomplete. The architecture comprises domain controllers corresponding to independent domain control parts, TSN network node modules and TSN gateways, the TSN network node modules and the TSN gateways are matched with the domain controllers, controlled communication links among control domains are established through the TSN network node modules and the TSN gateways, and data interaction among the control domains is formed. And establishing a TSN network controllable communication environment for the application scene among domain controllers formed according to the function type correlation. A domain controller set by a relatively independent control domain performs information interaction through TSN equipment supporting TSN gateway function information exchange, so that stable time delay transmission in a communication network is ensured, and the driving safety of a vehicle is ensured. Network bandwidth and bus nodes in a control domain are distributed in a TSN network environment according to the requirements of priority of equipment task requirements, communication channel capacity, real-time performance of information transmission and the like, and transmission reliability between a network and a control bus is guaranteed.

Description

Technical Field

[0001] The present invention relates to the field of communication technology, and in particular to an electric vehicle domain control communication architecture and a communication method. Background Art

[0002] At present, electric vehicles are facing the characteristics of "electrification, intelligence, and networking", with higher and higher requirements for safety, comfort, and reliability. On-board electronic and electrical products are growing at a geometric rate, which makes the distributed EEA (electronic and electrical architecture) system based on ECU more complex and resource utilization difficult to control and coordinate. For example, the electric vehicle network and control bus need to carry the service request traffic of all devices. These services include real-time data such as audio and video, control, and status monitoring, requiring stable and reliable information transmission to achieve the purpose of real-time control. When the internal communication and control equipment of electric vehicles is large in scale and the communication traffic is large, if the network and control bus architecture is not designed reasonably, the network and bus are likely to become performance bottlenecks. When problems occur in the network and control bus, the functions of some devices will be affected. In more serious cases, an avalanche effect will occur, and the problem status will be loaded to other nodes, which will affect the normal operation of other nodes, and eventually paralyze the entire system, resulting in irreversible consequences. Therefore, the concept of domain control is introduced in the electric vehicle field to manage and control electronic and electrical products in a hierarchical and classified manner. The purpose is to improve the coordination efficiency between the relevant devices of each subsystem, reduce the coupling intensity of the subsystem, and improve the information transmission rate and communication stability of the network and control bus. Summary of the invention

[0003] In view of the above problems, an embodiment of the present invention provides an electric vehicle domain control communication architecture and a communication method to solve the technical problems of imperfect existing domain control solutions.

[0004] The electric vehicle domain control communication architecture of the embodiment of the present invention includes:

[0005] The domain controller corresponding to the independent domain control part, the TSN network node module and the TSN gateway adapted to the domain controller establish controlled communication links between the control domains through the TSN network node module and the TSN gateway to form data interaction between the control domains.

[0006] In one embodiment of the present invention, the independent domain control part includes a cloud communication domain control part, an infotainment domain control part, an assisted driving domain control part, a power system domain control part and a body domain control part.

[0007] In one embodiment of the present invention, the cloud communication domain control part includes a cloud domain controller, and further includes:

[0008] 5G communication link, used to establish continuous communication with cloud servers and store vehicle operation and maintenance data;

[0009] Two-way short digital message link, used to establish navigation communication with Beidou satellites, and establish real-time vehicle navigation and road condition information interaction;

[0010] Local wireless communication link, used to form wireless access nodes such as WiFi and Bluetooth, to meet the needs of vehicle control and vehicle status information reading of smart devices such as mobile phones and control terminals;

[0011] Inter-vehicle communication link, used to establish communication with other vehicles and conduct language and video interaction when the vehicles are running in formation;

[0012] The cloud domain controller uses a baseband signal processor.

[0013] In one embodiment of the present invention, the infotainment domain control portion includes an information domain controller, and further includes:

[0014] Smart display touch screen, control buttons, audio, vehicle-mounted T-Box, and AI smart interactive service function modules connected to the MOST bus data;

[0015] The information domain controller uses a general-purpose processor based on the ARM architecture.

[0016] In one embodiment of the present invention, the auxiliary driving domain control part includes an intelligent domain controller, and further includes:

[0017] integrated lane keeping assist, automatic parking assist, brake assist, reverse assist, adaptive cruise control;

[0018] Assisted driving equipment, including but not limited to LiDAR and cameras;

[0019] The intelligent domain controller uses a general-purpose automotive-grade processor.

[0020] In one embodiment of the present invention, the power system domain control part includes a CAN bus controller, and further includes:

[0021] The underlying subsystem assemblies include power batteries and BMS management modules, motors and drivers, steering gears, brakes, heat dissipation devices, power system domain controllers, DCDC converters, power supply and distribution protection devices, etc. connected to the CAN bus.

[0022] In one embodiment of the present invention, the body domain control part includes a bus controller, and further includes:

[0023] Controlled windows, electric rearview mirrors, air conditioners, headlights, turn signals and other automotive controlled terminals connected to the CAN bus or LIN bus.

[0024] In one embodiment of the present invention, the TSN gateway includes:

[0025] Clock synchronization error optimization module, used to form clock synchronization of network nodes to meet real-time communication requirements;

[0026] Scheduling and traffic shaping module, used to form processing rules for data transmission and forwarding between network nodes, and to establish the division of bandwidth and delay indicators;

[0027] The communication path selection module is used to form multi-path transmission fault tolerance through communication paths, reserved bandwidth and time slot planning to ensure transmission reliability;

[0028] The transmission instruction priority optimization module is used to identify the transmission priority according to the control instruction type to ensure stable delay transmission in the communication network.

[0029] The electric vehicle domain control communication method according to the embodiment of the present invention utilizes the electric vehicle domain control communication architecture described above, and includes:

[0030] The clock of each TSN network node module is synchronized through the TSN gateway;

[0031] The default bandwidth configuration and reserved bandwidth configuration between each TSN network node module are formed through the TSN gateway;

[0032] The TSN gateway forms a service transmission priority identifier based on the control instruction type, and adjusts the communication link bandwidth configuration and delay guarantee parameters according to the priority identifier sent by the domain controller.

[0033] The electric vehicle domain control communication architecture and communication method of the embodiment of the present invention establishes a TSN network controllable communication environment for application scenarios between domain controllers formed according to the correlation of functional types. The domain controllers set up in relatively independent control domains exchange information through TSN devices that support TSN gateway function information exchange, ensuring stable time-delay transmission in the communication network and ensuring vehicle driving safety. In the TSN network environment, the network bandwidth and bus nodes in the control domain are allocated according to the priority of the device task requirements, the capacity of the communication channel, the real-time nature of information transmission, etc., to ensure the transmission reliability between the network and the control bus. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 FIG. 1 is a schematic diagram of an electric vehicle domain control communication architecture according to an embodiment of the present invention.

[0035] Figure 2 The figure is a schematic diagram of the topological structure of device communication in the electric vehicle domain control communication architecture according to an embodiment of the present invention.

[0036] Figure 3 FIG. 1 is a flow chart of an electric vehicle domain control communication method according to an embodiment of the present invention. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the present invention clearer and more understandable, the present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] The electric vehicle domain control communication architecture of an embodiment of the present invention is as follows Figure 1 As shown. Figure 1 In this embodiment, the present invention comprises:

[0039] The cloud communication domain control part 01 is used to form computing resources, communication resources and storage resources of integrated functions or subordinate devices in the domain independent of other control domains by setting up a cloud domain controller; and to form data exchange with other domain controllers through a TSN network node module adapted to the cloud domain controller.

[0040] In one embodiment of the present invention, a control mechanism is formed by a cloud domain controller to establish a corresponding type of communication link between the vehicle-mounted device and the external system or terminal, thereby controlling the link management, data forwarding and data caching between the vehicle-mounted device and the external system or terminal.

[0041] The infotainment domain control part 02 is used to form computing resources, communication resources and storage resources of integrated functions or subordinate devices within the domain independent of other control domains by setting up an information domain controller; and to form data exchange with other domain controllers through a TSN network node module adapted to the information domain controller.

[0042] In one embodiment of the present invention, a control mechanism of a broadband communication link between vehicle-mounted audio and video interactive devices is formed through an information domain controller to control signal collection and processing of in-vehicle perception sensors.

[0043] The assisted driving domain control part 03 is used to form computing resources, communication resources and storage resources of integrated functions or subordinate devices within the domain that are independent of other control domains by setting up an intelligent domain controller; and to form data exchange with other domain controllers through a TSN network node module adapted to the intelligent domain controller.

[0044] In one embodiment of the present invention, the functional modules or functional subsystems of vehicle assisted driving are integrated through an intelligent domain controller to perform data processing, data forwarding and data caching of corresponding functions.

[0045] The power system domain control part 04 is used to form computing resources, communication resources and storage resources of integrated functions or subordinate devices within the domain independent of other control domains by setting up a CAN bus controller; and to form data exchange with other domain controllers through a TSN network node module adapted to the CAN bus controller.

[0046] In one embodiment of the present invention, a control mechanism for the corresponding communication link of the underlying subsystem assembly of the automobile is formed through a CAN bus controller, and data processing is performed according to feedback signals from the subsystem assembly to form control data and forward it to the subsystem assembly.

[0047] The body domain control part 05 is used to form computing resources, communication resources and storage resources of integrated functions or subordinate devices within the domain independent of other control domains by setting up a body domain controller; and to form data exchange with other domain controllers through a TSN network node module adapted to the body domain controller.

[0048] In one embodiment of the present invention, a control mechanism is established through the vehicle body domain controller and the vehicle controlled terminal to establish a corresponding type of communication link, thereby forming direct control data for real-time control.

[0049] The TSN (Time Sensitive Network) gateway 06 is used to establish a controlled communication link between each control domain by setting a device with TSN information exchange gateway function, thereby forming data interaction between each control domain.

[0050] Those skilled in the art will understand that the domain controller of each control domain needs to be professionally configured according to the integrated function configuration type within the domain, the number of functional equipment deployed, the data throughput bandwidth of the deployed equipment, the complexity of the associated external systems, and the data support needs of the integrated functions, so as to meet the basic requirements and redundancy requirements for computing power, bandwidth, and storage.

[0051] TSN gateway and TSN network node modules can use TSN switch modules and TSN board modules to form a TSN network environment. Network configuration and management are performed through the TSN switch module.

[0052] In one embodiment of the present invention, the TSN gateway and the TSN network node integrate the communication network architecture of the above domain control part to ensure stable transmission of bus data of different priorities and different rates in a unified network architecture.

[0053] The electric vehicle domain control communication architecture of the embodiment of the present invention establishes a TSN network controllable communication environment for application scenarios between domain controllers formed according to the correlation of functional types. The domain controllers set up in relatively independent control domains exchange information through TSN devices that support TSN gateway function information exchange, ensuring stable time-delay transmission in the communication network and ensuring vehicle driving safety. In the TSN network environment, the network bandwidth and bus nodes in the control domain are allocated according to the priority of the equipment task requirements, the capacity of the communication channel, the real-time nature of information transmission, etc., to ensure the transmission reliability between the network and the control bus.

[0054] The device communication topology structure in the electric vehicle domain control communication architecture according to an embodiment of the present invention is as follows: Figure 2 As shown. Figure 2 In the cloud communication domain control part 01, it includes:

[0055] 5G communication link, used to establish continuous communication with cloud servers and store vehicle operation and maintenance data;

[0056] Two-way short digital message link, used to establish navigation communication with Beidou satellites, and establish real-time vehicle navigation and road condition information interaction;

[0057] Local wireless communication link, used to form wireless access nodes such as WiFi and Bluetooth, to meet the needs of vehicle control and vehicle status information reading of smart devices such as mobile phones and control terminals;

[0058] The inter-vehicle communication link is used to establish communication with other vehicles and conduct language and video interaction when the vehicles are operating in a platoon.

[0059] In one embodiment of the present invention, the cloud domain controller may use a general baseband signal processor. The external system or terminal includes but is not limited to a remote server, a navigation satellite, a mobile phone-type smart terminal, other vehicles, and the like.

[0060] like Figure 2 As shown, in one embodiment of the present invention, the infotainment domain control part 02 includes:

[0061] The intelligent display touch screen, control buttons, audio, vehicle T-Box, AI intelligent interactive service function module, etc. connected to the MOST (Media Oriented System Transport) bus data can realize the linkage of automobile hardware equipment, complete intelligent lighting control, intelligent voice prompts and other functions; and combine the detection capabilities of the dedicated camera and AI intelligent interactive service function module to detect the driver's fatigue level and give corresponding level prompt information. Use WIFI or Bluetooth link to interact with portable smart devices.

[0062] In one embodiment of the present invention, the information domain controller may adopt a general-purpose processor of ARM architecture.

[0063] like Figure 2 As shown, in one embodiment of the present invention, the auxiliary driving domain control part 03 includes:

[0064] Lane keeping assist system, automatic parking assist system, brake assist system, reversing assist system, adaptive cruise control system and other functional modules or functional subsystems;

[0065] Assisted driving equipment, including but not limited to various sensors such as lidar and cameras.

[0066] The functional module communicates with the auxiliary driving equipment through the local area network, which is used for vehicle auxiliary driving and improves driving safety. For example, it communicates with the laser radar, camera and other various sensors through Ethernet to realize the lane keeping assistance function, automatic parking assistance function, brake assistance function, reversing assistance function and adaptive cruise control function.

[0067] In one embodiment of the present invention, the intelligent domain controller may adopt a general-purpose processor of an automotive-grade SoC.

[0068] like Figure 2 As shown, in one embodiment of the present invention, the power system domain control part 04 includes:

[0069] The CAN bus is connected to the power battery and BMS management module, motor and driver, steering gear, brake, heat dissipation device, power system domain controller, DCDC converter, power supply and distribution protection device and other underlying subsystem assemblies. The CAN bus controller exchanges information through the CAN bus and is used for vehicle power supply and distribution and vehicle driving, steering and braking control.

[0070] like Figure 2 As shown, in one embodiment of the present invention, the body domain control part 05 includes:

[0071] Controlled windows, electric rearview mirrors, air conditioners, headlights, turn signals, etc. are controlled by the bus controller or bus master unit to control the windows, electric rearview mirrors, air conditioners, headlights, turn signals, etc.

[0072] like Figure 2 As shown, in one embodiment of the present invention, the TSN gateway 06 includes (not shown):

[0073] Clock synchronization error optimization module, used to form clock synchronization of network nodes to meet real-time communication requirements;

[0074] Scheduling and traffic shaping module, used to form processing rules for data transmission and forwarding between network nodes, and to establish the division of bandwidth and delay indicators;

[0075] The communication path selection module is used to form multi-path transmission fault tolerance through communication paths, reserved bandwidth and time slot planning to ensure transmission reliability. For example, transmission paths and bandwidth are planned according to task requirements to ensure reliable transmission of business data that meets the task in the communication network.

[0076] The transmission instruction priority optimization module is used to identify the transmission priority according to the control instruction type to ensure stable delay transmission in the communication network. For example, safety braking, steering control and other instructions are the highest priority transmission instructions, matching the shortest delay transmission link and bandwidth.

[0077] An electric vehicle domain control communication method according to an embodiment of the present invention is as follows Figure 3 As shown. Figure 3 In the embodiment, the electric vehicle domain control communication architecture of the above embodiment is used, and the present embodiment includes:

[0078] Configure TSN network node modules on the upstream side of each domain controller, and each TSN network node module is connected to the TSN gateway;

[0079] The clock of each TSN network node module is synchronized through the TSN gateway;

[0080] The default bandwidth configuration and reserved bandwidth configuration between each TSN network node module are formed through the TSN gateway;

[0081] The TSN gateway forms a service transmission priority identifier based on the control instruction type, and adjusts the communication link bandwidth configuration and delay guarantee parameters according to the priority identifier sent by the domain controller.

[0082] The electric vehicle domain control communication method of the embodiment of the present invention forms signal synchronization between control domains through the TSN network environment, coordinates the communication performance bottleneck caused by differences in bandwidth, rate and data encapsulation between various heterogeneous buses in each control domain, and realizes real-time communication quality assurance for business needs.

[0083] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. An electric vehicle domain control communication architecture, characterized in that: include: The domain controller corresponding to the independent domain control part, the TSN network node module and the TSN gateway adapted to the domain controller establish controlled communication links between the control domains through the TSN network node module and the TSN gateway to form data interaction between the control domains.

2. The electric vehicle domain control communication architecture according to claim 1, characterized in that: The independent domain control part includes a cloud communication domain control part, an infotainment domain control part, an assisted driving domain control part, a power system domain control part and a body domain control part.

3. The electric vehicle domain control communication architecture as claimed in claim 2, characterized in that: The cloud communication domain control part includes a cloud domain controller, and also includes: 5G communication link, used to establish continuous communication with cloud servers and store vehicle operation and maintenance data; Two-way short digital message link, used to establish navigation communication with Beidou satellites, and establish real-time vehicle navigation and road condition information interaction; Local wireless communication link, used to form wireless access nodes such as WiFi and Bluetooth, to meet the needs of vehicle control and vehicle status information reading of smart devices such as mobile phones and control terminals; Inter-vehicle communication link, used to establish communication with other vehicles and conduct language and video interaction when the vehicles are running in formation; The cloud domain controller uses a baseband signal processor.

4. The electric vehicle domain control communication architecture as claimed in claim 2, characterized in that: The infotainment domain control part includes an information domain controller, and also includes: Smart display touch screen, control buttons, audio, vehicle-mounted T-Box, and AI smart interactive service function modules connected to the MOST bus data; The information domain controller uses a general-purpose processor based on the ARM architecture.

5. The electric vehicle domain control communication architecture as claimed in claim 2, characterized in that: The auxiliary driving domain control part includes an intelligent domain controller and also includes: integrated lane keeping assist, automatic parking assist, brake assist, reverse assist, adaptive cruise control; Assisted driving equipment, including but not limited to LiDAR and cameras; The intelligent domain controller uses a general-purpose automotive-grade processor.

6. The electric vehicle domain control communication architecture as claimed in claim 2, characterized in that: The power system domain control part includes a CAN bus controller, and also includes: The underlying subsystem assemblies include power batteries and BMS management modules, motors and drivers, steering gears, brakes, heat dissipation devices, power system domain controllers, DCDC converters, power supply and distribution protection devices, etc. connected to the CAN bus.

7. The electric vehicle domain control communication architecture as claimed in claim 2, characterized in that: The body domain control part includes a bus controller and also includes: Controlled windows, electric rearview mirrors, air conditioners, headlights, turn signals and other automotive controlled terminals connected to the CAN bus or LIN bus.

8. The electric vehicle domain control communication architecture as claimed in claim 2, characterized in that: The TSN gateway includes: Clock synchronization error optimization module, used to form clock synchronization of network nodes to meet real-time communication requirements; Scheduling and traffic shaping module, used to form processing rules for data transmission and forwarding between network nodes, and to establish the division of bandwidth and delay indicators; The communication path selection module is used to form multi-path transmission fault tolerance through communication paths, reserved bandwidth and time slot planning to ensure transmission reliability; The transmission instruction priority optimization module is used to identify the transmission priority according to the control instruction type to ensure stable delay transmission in the communication network.

9. An electric vehicle domain control communication method, characterized in that: The electric vehicle domain control communication architecture as claimed in any one of claims 1 to 9 includes: The clock of each TSN network node module is synchronized through the TSN gateway; The default bandwidth configuration and reserved bandwidth configuration between each TSN network node module are formed through the TSN gateway; The TSN gateway forms a service transmission priority identifier based on the control instruction type, and adjusts the communication link bandwidth configuration and delay guarantee parameters according to the priority identifier sent by the domain controller.

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