Video Data Download via Distributed Wireless Hotspots
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Solution Overview
Problem
Transit vehicles face limited wireless bandwidth at depots, resulting in only a subset of video data being downloaded, with potentially important scenes being lost as newer data overwrites the older recordings.
Innovation Solution
Implementing a video system that allows transit vehicles to automatically download video data throughout the day by connecting to inexpensive wireless hotspots encountered along their routes, enabling more complete data transfer and providing administrators with the ability to preview and prioritize relevant video data for earlier access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If video data is downloaded only at the depot using limited bandwidth, then download operations are simple, but video data completeness deteriorates and important scenes are lost
Solution Approach 1:
The patent segments the single depot download operation into multiple distributed download points along the vehicle route. Wireless access points are placed at various locations (traffic courts, transfer stations, maintenance facilities) throughout the service area, allowing video data to be downloaded in segments at multiple locations rather than requiring a single large transfer at the depot.
Solution Approach 2:
The patent adds a spatial dimension to the download operation by distributing wireless access points across the geographic service area. Instead of a single download location at the depot, the system creates a three-dimensional download network spanning the entire service region, allowing vehicles to access multiple download points during their routes.
2Productivity
If multiple vehicles download video data simultaneously at the depot, then centralized storage is simplified, but bandwidth availability deteriorates and download speed decreases
Solution Approach 1:
The patent segments the集中ized bandwidth resource into multiple distributed bandwidth sources at different geographic locations. Each wireless access point provides local bandwidth resources, so multiple vehicles can download simultaneously at different locations without competing for the same bandwidth pool.
Solution Approach 2:
The patent transforms the single-bandwidth-source model into a multi-dimensional bandwidth network. Bandwidth resources are distributed across multiple spatial locations, allowing parallel download operations to occur simultaneously without bandwidth contention.
3Loss of information
If only identified video scenes are downloaded, then bandwidth usage is optimized, but risk of losing unidentfied important scenes increases
Solution Approach 1:
The patent performs preliminary actions by making video data available for download at multiple locations before the end of the shift. Rather than waiting until the shift ends to download data, the system enables opportunistic downloads at intermediate points, ensuring data is transferred while still in memory and not yet overwritten.
Solution Approach 2:
The patent applies partial download action by transferring video data in portions at multiple locations rather than requiring complete data transfer at a single point. This allows selective downloading of data based on availability and bandwidth conditions at each location.
4Reliability
If video data is stored in memory during the shift, then real-time access is enabled, but data overwriting risk increases when memory capacity is exceeded
Solution Approach 1:
The patent performs preliminary data transfer actions at multiple intermediate points during the shift rather than waiting until the end. This preliminary action reduces the duration that data remains in vulnerable memory storage, minimizing the window of opportunity for data overwriting.
Solution Approach 2:
The patent establishes continuous data transfer opportunities throughout the shift by positioning wireless access points along vehicle routes. Instead of a single discrete download event at the end of the shift, the system provides continuous download capability at multiple points in time and space.
Data Source
AI summary
A video system includes at least one video subsystem including a video source coupled to a mobile platform. The video source is configured to capture and transmit video data. A video processing system is configured to receive transmission of the video data from the video subsystem at a plurality of locations in which the video subsystem is configured to transmit the video data to the video processing system automatically when the video subsystem is in range of the video processing system at each of the plurality of locations.