UAV State Data Slicing for Bandwidth Reduction
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Solution Overview
Problem
Existing methods for state sharing in UAV teams face inefficiencies due to high bandwidth consumption and delayed data transmission, particularly when UAVs are far apart, as they rely on compressing data or reducing sampling frequency, which can lead to inadequate real-time environmental perception and coordination.
Innovation Solution
A method that automatically segments and summarizes state data into non-uniform slices, adjusting the slice length based on the speed of state changes, allowing for adaptive and efficient data transmission without compromising real-time performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If active sharing mode is used to send state information in real time, then real-time performance and information sharing are improved, but bandwidth consumption increases significantly
Solution Approach 1:
The patent segments the continuous state data stream into discrete state changes or events. Instead of transmitting all state data continuously, only significant state changes are segmented and transmitted, reducing bandwidth consumption while maintaining real-time performance for critical updates.
Solution Approach 2:
The patent extracts only the essential state information that needs to be shared among UAVs, rather than transmitting complete sensor data. By taking out only the relevant state changes, the system reduces bandwidth consumption while preserving real-time coordination capability.
2Quantity of substance
If data compression is used to reduce bandwidth consumption, then bandwidth consumption decreases, but data transmission delay increases
Solution Approach 1:
The patent dynamically adjusts the data transmission strategy based on the current state of UAVs and environmental conditions. When bandwidth is available and state changes are frequent, more detailed information is transmitted. When bandwidth is limited, only critical state changes are transmitted, optimizing the balance between bandwidth consumption and transmission delay in real-time.
Solution Approach 2:
The patent changes the parameters of data transmission by adjusting the granularity and frequency of state information sent based on mission requirements, UAV positions, and communication conditions. This allows the system to adapt transmission parameters to minimize both bandwidth consumption and delay according to current operational needs.
3Quantity of substance
If sampling frequency is decreased to reduce the number of transmissions, then bandwidth consumption decreases, but real-time environmental perception capability deteriorates
Solution Approach 1:
The patent implements periodic transmission of state information based on significant events or state changes rather than fixed-time intervals. This event-driven periodic action ensures that critical environmental changes are captured and transmitted promptly, maintaining perception capability while reducing unnecessary transmissions during stable states.
Solution Approach 2:
The patent uses feedback mechanisms where UAVs monitor their own state changes and the states of other team members, transmitting information only when changes exceed certain thresholds. This feedback-driven approach ensures real-time perception of environmental changes while minimizing the number of transmissions by filtering out insignificant updates.
Data Source
AI summary
Methods and systems of synchronous sending are described for state sharing of UAV teams. Most state data of UAV is nonstationary time series, the state data collected or perceived by sensors of UAV is segmented automatically with changepoint detection methods in real time. Each segment is sliced non-uniformly, and all the data of each slice is summarized. The summary result of each slice is finally sent for sharing among UAV teams. The changing of state generation parameters of UAV flight or working can be discovered and the segments are non-uniformly sliced automatically in the invention. The shared data is sent in time when the state changes irregularly while it is sent at large intervals when the state changes regularly. The invention reduces the number of sending substantially and then decreases the bandwidth consumption of state sharing of UAV teams, without decreasing the real time of state sharing.