Variable-Length Superframes for Satellite Beam-Hopping
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current DVB-S2X standard's fixed-length superframes lead to inefficiencies in satellite bandwidth utilization and latency due to rigid dwell times, which are inadequate for varying traffic demands and multi-beam operations.
Innovation Solution
A transceiver configured to transmit and receive superframes with variable lengths, using payload capacity units and dummy symbols, allowing flexible hop durations and synchronization, and enabling splitting of regular frames between superframes, with parameters calculated based on symbol rates and hop times.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If fixed-length superframes are used in DVB-S2X standard, then standard compatibility is maintained, but bandwidth utilization efficiency deteriorates due to rigid dwell times
Solution Approach 1:
The patent implements dynamic superframe length adjustment by introducing a variable number of capacity units (CUs) and optional dummy CUs, allowing the superframe structure to adapt its duration to match actual traffic demands. This enables the system to extend or shorten superframe lengths dynamically, optimizing bandwidth utilization while maintaining DVB-S2X standard compatibility through structured flexibility.
Solution Approach 2:
The patent changes the parameter of superframe length from fixed to variable by introducing configurable capacity units and dummy capacity units. The number of CUs and dummy CUs can be adjusted to modify superframe duration, enabling the system to adapt to varying traffic patterns and optimize bandwidth efficiency without breaking standard compatibility.
2Loss of time
If fixed-length superframes are used, then frame structure simplicity is maintained, but latency increases due to inability to adjust dwell times
Solution Approach 1:
The patent segments the superframe into discrete capacity units (CUs) that can be individually configured. By dividing the superframe structure into modular CUs and optional dummy CUs, the system can adjust the number of units to optimize latency for different traffic scenarios while maintaining a manageable and structured framework that avoids excessive complexity.
Solution Approach 2:
The patent introduces dynamic configurability to the superframe structure through variable numbers of capacity units and dummy capacity units. This allows the system to adapt superframe duration to traffic requirements, reducing latency when needed while maintaining a structured approach that prevents uncontrolled complexity growth.
3Adaptability or versatility
If variable superframe lengths are implemented, then traffic pattern adaptability improves, but synchronization difficulty increases
Solution Approach 1:
The patent introduces dummy capacity units as intermediary elements that facilitate synchronization in variable-length superframes. These dummy CUs serve as recognizable markers or delimiters that help terminals detect superframe boundaries and maintain synchronization despite variations in actual data payload lengths, thereby reducing synchronization difficulty while preserving adaptability.
Solution Approach 2:
The patent manages synchronization by carefully controlling the parameter of superframe length through structured configuration of capacity units and dummy units. By establishing clear rules for variable length adjustment and incorporating synchronization-friendly elements like dummy CUs, the system achieves traffic adaptability while keeping synchronization complexity manageable through parameterized control.
4Adaptability or versatility
If beam hopping is implemented with variable dwell times, then capacity allocation flexibility improves, but power consumption increases
Solution Approach 1:
The patent implements dynamic capacity unit configuration that allows beam hopping systems to adjust dwell times according to actual traffic demands. By using variable numbers of capacity units and dummy capacity units, the system can allocate beam resources more efficiently, concentrating power on high-demand beams while reducing or eliminating dwell time on low-demand beams, thereby improving capacity flexibility while actually optimizing power consumption through targeted resource allocation.
Data Source
AI summary
A transceiver is provided which is configured to be used in a satellite communications network and adapted to superframes having variable lengths, wherein at least one of the received superframes has standard payload capacity units (P) and known symbols (D).