Managed Time Division Duplex Baseband Signaling for Satellite Terminals
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Solution Overview
Problem
Current communication protocols over a single communication link, such as those used in satellite user terminals, face challenges with high error rates and latency due to data collisions and the need for multiple wires, which increase costs and complexity.
Innovation Solution
A managed time division duplex baseband signaling protocol is implemented, where each node has a designated transmission period, reducing data collisions and allowing for low error rate, low latency, and high bandwidth communication over a single communication link, with adaptive management of transmission periods and the ability to switch between different baseband signaling protocols based on signal quality parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple wires are used for parallel bus communication, then data transmission bandwidth is improved, but device complexity and cost increase
Solution Approach 1:
The patent merges multiple communication functions (data transmission, acknowledgment, error detection) into a single communication link. Instead of using separate wires for parallel bus communication, the invention combines bidirectional communication between IDU and ODU into one link, using time division multiplexing to achieve both high bandwidth and low complexity.
Solution Approach 2:
The patent implements periodic time division duplexing where transmission periods are allocated alternately to IDU and ODU. This periodic action allows the single communication link to efficiently handle bidirectional data flow with proper timing, achieving parallel bus-like bandwidth through sequential time slots.
2Productivity
If data transmission is allowed simultaneously in both directions, then communication efficiency is improved, but data collisions and error rates increase
Solution Approach 1:
The patent uses periodic time division duplexing to alternate transmission directions. During IDU transmission periods, ODU remains silent and vice versa. This periodic separation of transmission directions eliminates data collisions while maintaining high communication efficiency through proper time slot allocation and switching.
Solution Approach 2:
The patent implements preliminary switching actions before data transmission begins. Switches at both IDU and ODU are pre-configured to the correct input/output ports based on the current transmission period, ensuring that data is routed correctly before transmission starts, thereby preventing collisions and improving reliability.
3Device complexity
If a single communication link is used, then device complexity is reduced, but bandwidth and transmission capacity decrease
Solution Approach 1:
The patent achieves high transmission capacity on a single link through periodic time division multiplexing. By rapidly alternating between IDU and ODU transmission periods and using efficient baseband signaling, the single link delivers aggregate bandwidth comparable to multiple parallel links, thus maintaining low device complexity while maximizing productivity.
Solution Approach 2:
The patent implements dynamic time allocation where transmission periods can be adaptively adjusted based on traffic requirements. This dynamic approach allows the single communication link to flexibly accommodate varying data loads, optimizing transmission capacity without requiring multiple fixed links.
4Device complexity
If transmission periods are fixed, then system simplicity is improved, but adaptability to different signal qualities decreases
Solution Approach 1:
The patent implements dynamic transmission period management where the system can adaptively switch between different baseband signaling protocols (e.g., NRZ, PRS, PAM) based on detected signal quality parameters. This dynamic adaptation allows the system to maintain optimal performance across varying channel conditions without requiring complex fixed-period management for each scenario.
Solution Approach 2:
The patent changes signaling parameters (protocol type, transmission period duration, data rate) based on signal quality feedback. When signal quality degrades, the system can switch to more robust protocols or adjust transmission parameters, providing adaptability while keeping the underlying time division duplexing framework simple and manageable.
Data Source
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AI summary
The present disclosure relates to one or more techniques for communicating across multiple nodes using a single communication link. In certain embodiments, the nodes may be an indoor unit and an outdoor unit of a satellite user terminal for a satellite system. The multiple nodes may communicate with each other using a managed time division duplexed baseband signaling protocol over a single communication link.