UAV Telemetry Multipathing Across Networks for Low-Latency Reliability
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Solution Overview
Problem
Unmanned Aerial Vehicles (UAVs) face challenges in transmitting telemetry information reliably and with low latency due to the unreliability and high latency of single communication networks, necessitating a method to ensure consistent and timely data transmission.
Innovation Solution
Implementing a system where UAVs transmit the same telemetry information simultaneously over multiple networks using UDP, with duplicate messages marked by identifiers, allowing the ground system to process only the first received message and discard duplicates, thereby ensuring reliability and low latency even if one network experiences issues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If telemetry information is transmitted over a single communication network, then device complexity is reduced, but reliability and latency performance deteriorate
Solution Approach 1:
The communication system is segmented into multiple independent network paths (e.g., cellular network and satellite network). The UAV transmits telemetry information simultaneously over these separate networks, dividing the communication task into parallel segments to improve reliability without requiring a single complex redundant system
Solution Approach 2:
The telemetry transmission system is designed to operate universally across multiple types of communication networks. The same telemetry data can be transmitted over different network infrastructures (cellular, satellite, hybrid) simultaneously, making the system multi-functional and adaptable to various network conditions while maintaining consistent reliability
2Reliability
If duplicate messages are transmitted over multiple networks, then reliability improves, but processing complexity increases
Solution Approach 1:
Duplicate messages are transmitted in advance over multiple networks before any potential reception failure occurs. By proactively sending redundant copies through different communication paths, the system ensures that at least one message arrives reliably, eliminating the need for complex retransmission protocols or error checking mechanisms
Solution Approach 2:
The system creates and transmits identical copies of telemetry messages over multiple independent networks. Instead of transmitting the original message through a single complex error-correcting channel, simple copies are sent through multiple simpler channels, reducing processing complexity at the source while improving reception reliability
3Loss of time
If messages are transmitted over multiple networks simultaneously, then latency is reduced, but energy consumption increases
Solution Approach 1:
The system transmits telemetry messages partially redundantly by sending copies over multiple networks simultaneously. This excessive action of sending more messages than strictly necessary ensures that at least one arrives with minimal latency, while the energy cost is distributed across multiple simpler transmission paths rather than requiring a single high-power optimized channel
Data Source
AI summary
A method may include receiving, from an unmanned aerial vehicle (UAV), a first message via a first network using User Datagram Protocol (UDP). The method may further include determining whether a second message that is identical to the first message has been received from the UAV via a second network that is different than the first network. The method may additionally include processing the first message when the second message has not been received and discarding the first message when the second message has been received.