Satellite ACM Control Loop for Transparent Packet Transmission
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Solution Overview
Problem
Current satellite telecommunications systems face challenges in optimizing spectral resource usage and reducing onboard complexity for high-speed data packet switching, particularly with DVB-S2 frame transport, leading to data losses and inefficient spectral efficiency.
Innovation Solution
Implementing an end-to-end adaptive coding and modulation (ACM) control loop that estimates signal-to-noise and interference ratios across inter-satellite links to dynamically adjust modulation and coding parameters, allowing for transparent data packet transport with minimal onboard processing and optimized spectral resource use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If local adaptive coding and modulation (ACM) is used per ground station-satellite link, then spectral resource optimization is improved, but onboard processing complexity increases and data losses occur in satellite buffers
Solution Approach 1:
The patent segments the communication link into multiple independent hops (ground station to satellite, satellite to ground station) and applies separate ACM control loops for each direction. This segmentation allows each satellite to operate with simplified processing while maintaining overall system reliability through end-to-end adaptive control.
Solution Approach 2:
The patent implements feedback mechanisms where each satellite measures the SNIR of incoming and outgoing links and adjusts its transmission parameters accordingly. The destination satellite feeds back quality information to the source ground station, which then adapts its transmission parameters to prevent buffer overflows and data losses without requiring complex onboard processing at intermediate satellites.
2Productivity
If local ACM is applied to optimize each link, then spectral efficiency is improved, but modulation and coding parameters become inconsistent across different links requiring complex segmentation or concatenation processing
Solution Approach 1:
The patent creates a universal ACM control mechanism that operates consistently across all links in the network. Each satellite and ground station follows the same adaptive control logic, measuring local SNIR conditions and adjusting parameters independently. This universal approach eliminates the need for complex segmentation or concatenation processing while maintaining spectral efficiency across diverse link conditions.
3Speed
If high-speed data packet switching is implemented through satellites, then data transmission speed is improved, but spectral resource optimization becomes difficult and onboard processing complexity increases
Solution Approach 1:
The patent enables each satellite and ground station to autonomously manage its own transmission parameters through local SNIR measurement and adaptive adjustment. This self-service approach allows high-speed packet switching without requiring complex centralized control or extensive onboard processing, as each node independently optimizes its transmissions based on real-time channel conditions.
Data Source
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AI summary
An end-to-end transparent data packet transport method is implemented by a telecommunications system (2) comprising a first starting station (4), a second destination station (6), a first starting satellite (8) directly connected to the first station (4), and a second destination satellite (10) directly connected to the second station (6), the first and second satellites (8, 10) being interconnected by a space network (42). The transport method includes steps enabling the implementation of an end-to-end transparent loop for adaptive control of the modulation and coding of the access links (22, 24, 32, 34) between the first station (4) and the first satellite (8) and between the second station (6) and the second satellite (10).