Vehicle Control Device Multi-Layer Map Segmentation Narrow Bandwidth
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Solution Overview
Problem
Current vehicle control systems face challenges in efficiently transmitting and processing map information due to narrow bandwidth in cellular communication and degraded inter-vehicle communication sensitivity in weak signal areas, particularly in autonomous driving scenarios.
Innovation Solution
A vehicle control device with a communication unit that receives a map with multiple layers from a server and a processor that generates control signals based on a defined control region, using data relevant to the vehicle's location and excluding irrelevant data to optimize autonomous driving, with the control region defined by factors such as traffic, speed, road type, and driving direction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If map information is transmitted using cellular communication, then location information can be transmitted to external servers, but bandwidth is narrow and map information reception is difficult
Solution Approach 1:
The map information is divided into multiple layers (first layer, second layer, third layer) with different levels of detail and data quantities. The communication unit selectively receives and transmits only the necessary layers based on current driving conditions, thereby reducing the total quantity of data transmitted over the narrow bandwidth cellular communication channel while ensuring essential map information is always available.
Solution Approach 2:
Different layers of map information are assigned different qualities and levels of detail. The first layer contains essential navigation information with smaller data volume, while subsequent layers contain progressively more detailed information. The system dynamically selects which layers to transmit based on local driving conditions, ensuring that the most relevant information is prioritized for transmission over the limited bandwidth channel.
2Reliability
If V2X communication is used to receive location information of external vehicles, then inter-vehicle communication is enabled, but communication sensitivity is degraded in weak signal areas and update frequency is limited
Solution Approach 1:
The communication unit is designed to support multiple communication methods including both V2X communication and cellular communication. This multi-functional capability allows the system to switch between or combine different communication channels depending on signal conditions, thereby maintaining reliable inter-vehicle communication even in weak signal areas where V2X performance degrades.
Solution Approach 2:
The server acts as an intermediary that receives map information from the communication unit and processes it into multiple layers before transmitting back to the terminal device. This intermediary processing allows the system to optimize data transmission by sending only essential information through unreliable channels while maintaining communication flexibility.
3Loss of information
If all map data is used for control signal generation, then comprehensive information is available, but processing time increases and system efficiency decreases
Solution Approach 1:
The processor extracts and uses only the necessary map information from the received multi-layer map data for control signal generation. By selectively processing only the relevant layers and portions of map data that are essential for current driving decisions, the system maintains information completeness for safety-critical functions while dramatically reducing processing time and computational load.
Solution Approach 2:
The system processes only the partial set of map information that is currently necessary for vehicle control, rather than processing all available map data. This partial action approach ensures that essential control decisions are made quickly using only the minimum required information, improving real-time response while maintaining adequate information completeness for safe operation.
Data Source
AI summary
The present disclosure relates to a vehicle control device provided in a vehicle and a method for controlling the vehicle. A vehicle control device provided in a vehicle according to the present disclosure, as a vehicle control device for controlling the vehicle, may include a communication unit configured to receive a map having a plurality of layers from a server; and a processor configured to generate a control signal for driving the vehicle using the map, wherein a control region that is a reference for the generation of the control signal around a location of the vehicle is defined differently according to a preset reference.