UAV TDM Communication Channel Sharing
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Solution Overview
Problem
Current unmanned aerial vehicle (UAV) communication systems require separate equipment for remote control and image transmission, leading to increased space and cost, and are prone to interference, which affects stability and distance of operations.
Innovation Solution
Implementing a method using cyclically repeating time division multiplexing (TDM) frames to share the same communication channel for uplink and downlink data transmission, with different coding and modulation schemes to avoid interference and ensure robust uplink and wideband downlink data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate equipment is used for remote control and image transmission, then transmission reliability is improved, but device complexity and space requirements increase
Solution Approach 1:
The patent combines separate remote control and image transmission systems into a single integrated communication system that shares the same physical equipment and frequency spectrum. Time-division multiplexing is used to separate the data streams, allowing one set of equipment to perform multiple functions simultaneously, thereby reducing device complexity and space requirements while maintaining transmission reliability through dedicated time slots for each function
2Adaptability or versatility
If separate equipment operates simultaneously on the same channel, then transmission functionality is improved, but interference between systems increases
Solution Approach 1:
The patent segments the communication channel into distinct time slots using time-division multiplexing. Each time slot is dedicated to either remote control transmission or image transmission, preventing simultaneous operation on the same channel. This temporal segmentation eliminates interference between the two functions while maintaining full transmission functionality, as each function has dedicated time periods for operation
3Device complexity
If time division multiplexing is used to share communication channel, then device complexity is reduced, but transmission bandwidth for each direction is limited
Solution Approach 1:
The patent implements periodic time-division multiplexing where communication channels are allocated in repeating cycles. Each cycle contains dedicated time slots for uplink and downlink transmissions. This periodic allocation ensures that each direction receives sufficient bandwidth over time, while the periodic nature allows efficient reuse of the same physical channel resources, reducing overall device complexity
Data Source
AI summary
A method for wireless communication includes transferring uplink data to a movable object during a first time slot, measuring channel quality associated with one or more frequency channels during a second time slot to select a working frequency channel from the one or more frequency channels, and receiving downlink data from the remote terminal using the working frequency channel during a third time slot. The first, second, and third time slots do not overlap each other. The uplink data includes synchronization information for synchronizing data transmission with the movable object.