Drone Communication TDMA Frame Segmentation for Latency and Reliability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Unmanned mobile device systems face challenges in ensuring reliable wireless communications over long distances, managing multiple devices, and maintaining low latency for conversational audio signals while transmitting various data types, including radar traces, images, and video streams, within specific frequency bands.
Innovation Solution
A communication system utilizing time division multiple access (TDMA) with frame-based communication, sector antennas, and advanced channel coding techniques, including LDPC and BCH coding, along with minimum displacement continuous phase modulation, to ensure reliable and efficient data exchange between command stations and unmanned mobile devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If wireless communication is used for remote control and data transmission, then the unmanned mobile device can operate remotely, but communication reliability deteriorates over long distances
Solution Approach 1:
The communication frame is segmented into multiple time intervals with different functions (synchronization interval, data transmission interval, acknowledgment interval). This segmentation allows optimized handling of different communication aspects, improving overall reliability while maintaining remote operation capability
Solution Approach 2:
Synchronization signals and timing references are transmitted in advance at the beginning of each frame. This preliminary action ensures that devices are properly synchronized before actual data transmission begins, preventing communication errors over long distances
2Adaptability or versatility
If multiple unmanned mobile devices are controlled simultaneously, then system versatility improves, but communication management complexity increases
Solution Approach 1:
Time intervals within each frame are segmented and assigned to specific devices or functions. Each device has dedicated time slots for transmission and reception, allowing multiple devices to operate simultaneously without interference while simplifying the management of each individual device's communication schedule
Solution Approach 2:
Communication follows a periodic frame structure that repeats with fixed intervals. This periodicity allows devices to anticipate when they will transmit or receive data, reducing the complexity of real-time communication management while supporting multiple devices in a systematic manner
3Loss of time
If frame duration is shortened to reduce latency, then audio conversation quality improves, but data transmission completeness may deteriorate
Solution Approach 1:
Data transmission is segmented across multiple time intervals within the frame rather than attempting to transmit all data in a single continuous stream. This allows the frame duration to be kept short for low latency while ensuring complete data transmission through structured segmentation of synchronization, data, and acknowledgment phases
Solution Approach 2:
The frame structure ensures continuous useful action by immediately following synchronization with data transmission and then acknowledgment, without idle gaps. This continuous progression maintains low latency while ensuring reliable completion of each communication phase
Data Source
Figure 1~2
Figure 3~4B
Figure 5
AI summary
Communication system, used in a system of drones, based on a communication technique of TDMA type in which the time is divided into a plurality of levels of hierarchy of temporal decomposition. The set of the hierarchy levels is adapted to comply with a plurality of constraints related to the system of drones comprising a first constraint implying that each communication between a drone and a control station for the system of drones must be compatible with a transmission of audio conversation data, a second constraint implying that the control station must be capable of controlling a predefined number of drones simultaneously and a third constraint implying that, the system of drones using transmissions based on data blocks, each data block must be transmitted on a stationary channel.