Edge Device HD Map Version Selection for Wireless Channel Constraints
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Solution Overview
Problem
The existing high-definition (HD) map delivery systems face challenges in delivering accurate and timely HD maps to vehicles due to fluctuating wireless communication channel status, which can lead to delays and safety issues in autonomous driving.
Innovation Solution
An edge device that determines the appropriate HD map version based on the wireless channel status and task type requested by the vehicle, optimizing the data transmission to ensure timely and accurate map delivery for autonomous driving.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If high-speed transmission of HD map is required for autonomous driving, then map accuracy and timeliness are improved, but wireless communication bandwidth requirements increase and transmission delays occur when channel status is poor
Solution Approach 1:
The patent segments HD map data into multiple versions with different levels of detail and information completeness. The edge device transmits only the appropriate version based on channel conditions, dividing the complete HD map into hierarchical layers of information that can be selectively delivered to meet timing requirements while maintaining essential accuracy.
Solution Approach 2:
The patent changes the parameter of map data by providing multiple versions with varying levels of detail, resolution, and information completeness. The edge device selects and transmits the appropriate version based on wireless channel status, task type, and deadline requirements, optimizing the balance between map accuracy and transmission timing.
2Reliability
If complete HD map data is transmitted to ensure autonomous driving safety, then reliability is improved, but transmission bandwidth requirements increase and delivery timeliness deteriorates under fluctuating channel conditions
Solution Approach 1:
The patent applies partial action by transmitting only the necessary portion of HD map data required for the specific autonomous driving task. The edge device determines the appropriate map version based on task requirements and channel status, delivering sufficient information for safe operation without transmitting unnecessary complete data, thus improving delivery speed while maintaining reliability.
Solution Approach 2:
The patent makes the HD map transmission dynamic by adapting the map version selected for transmission based on real-time wireless channel status, vehicle task type, and deadline requirements. The edge device dynamically adjusts the level of map detail transmitted, ensuring reliability is maintained while optimizing delivery speed under varying conditions.
3Productivity
If different sizes of HD maps are transmitted based on communication channel status, then transmission efficiency is improved, but system complexity increases due to multiple map versions and selection logic
Solution Approach 1:
The patent applies universality by designing a multi-functional edge device that handles multiple tasks: storing multiple HD map versions, evaluating wireless channel status, determining task requirements, selecting appropriate map versions, and managing transmissions. This universal device consolidates complexity into a single component rather than requiring separate systems for each function.
Solution Approach 2:
The patent applies preliminary action by pre-preparing multiple versions of HD maps in advance at the edge device. The different map versions are stored ready for transmission, and the selection logic is pre-programmed to evaluate channel status and task requirements, enabling rapid selection and transmission without real-time processing complexity.
4Reliability
If HD map delivery meets strict deadlines for autonomous driving tasks, then task completion reliability is improved, but transmission buffer requirements increase to handle channel fluctuations
Solution Approach 1:
The patent segments the transmission buffer requirements by allocating different buffer needs to different map versions. Smaller, less detailed map versions require smaller buffers and can be transmitted more quickly, while larger versions have larger buffer allocations. This segmentation allows the system to meet deadline requirements with reduced overall buffer requirements by selecting appropriate versions based on available time and channel conditions.
Data Source
AI summary
An edge device for providing an HD map to a vehicle is provided. The edge device includes a controller programmed to obtain an HD map request including a task type from a vehicle, obtain a status of a wireless channel between the vehicle and the edge device, determine an HD map version among a plurality of versions based on the status of the wireless channel and the task type, and transmit the determined HD map version to the vehicle.