Vehicle OTA Update Frame Allocation for Bandwidth Control
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Solution Overview
Problem
Existing Over-The-Air (OTA) software update technologies face challenges in efficiently utilizing limited communication bandwidth without affecting other vehicle services and completing updates within a predetermined period.
Innovation Solution
A center system manages software updates by allocating permission and multiplex frames to control the number of vehicles and distribution packages, respectively, ensuring efficient transmission without overburdening the communication band.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If OTA software update services are provided to multiple vehicles simultaneously, then software update capability is improved, but communication band pressure increases and other vehicle services are affected
Solution Approach 1:
The patent segments the software update process into distinct phases: inquiry phase (checking update availability) and transmission phase (downloading distribution packages). It further segments the communication band allocation by introducing permission frames that limit the number of simultaneous update operations. This segmentation allows the system to manage multiple vehicles efficiently while preventing communication band overload.
Solution Approach 2:
The patent implements preliminary action by having vehicles first send an inquiry to the server to check whether software updates are available before actually downloading the distribution package. The server responds with information about available update slots (permission frames) in advance, allowing vehicles to plan their update requests accordingly and avoid simultaneous transmission requests that would congest the communication band.
2Speed
If multiple vehicles request software updates simultaneously, then update processing speed is improved, but communication band is overburdened
Solution Approach 1:
The patent introduces dynamic control through permission frames that can be allocated and released based on real-time conditions. The server dynamically manages the number of active update permissions by allocating permission frames to vehicles that need updates and releasing them when updates complete or slots are full. This dynamic mechanism allows the system to optimize update processing speed while adapting to communication band availability to prevent overload.
Solution Approach 2:
The patent introduces an intermediary mechanism (the permission frame system) between vehicle update requests and actual distribution package transmissions. The server acts as a mediator that receives update requests, checks availability, allocates permission frames, and controls the transmission process. This intermediary layer coordinates multiple vehicles' update operations to ensure efficient use of communication bandwidth without overburdening the system.
3Productivity
If communication band is allocated for OTA updates, then software update function is improved, but other vehicle services are affected
Solution Approach 1:
The patent applies partial action by allocating only the necessary communication resources for software updates through permission frames, rather than reserving the entire communication band. The system allows update operations to proceed using a controlled portion of available bandwidth, while other vehicle services can use the remaining bandwidth. This partial allocation approach enables software update functionality to coexist with other vehicle communication needs without completely blocking other services.
Data Source
AI summary
A center that is configured to communicate with an Over-The-Air (OTA) master that controls software update for an electronic control unit mounted on a vehicle is provided. The center includes one or more processors configured to determine availability of permission frames when an inquiry for software update is received from the OTA master and update data for the electronic control unit exists, and, when at least one of the permission frames is available, allocate the permission frame available among the permission frames to the OTA master and permit update processing. The one or more processors are configured to determine availability of a multiplex frame when a transmission request for the distribution package is received from the OTA master, and, when at least one of the multiplex frames is available, allocate a multiplex frame available among the multiplex frames to the OTA master and control transmission of the distribution package.