Dynamic MODCOD Selection for Satellite Multicast Streams
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Solution Overview
Problem
Conventional satellite communication systems use static multicast MODCOD configurations, which are inefficient and unreliable due to varying terminal conditions, leading to bandwidth wastage and service disruptions, especially in high-throughput satellite networks with diverse terminal capabilities and changing environmental conditions.
Innovation Solution
A method and system that dynamically determine and adjust the multicast MODCOD based on the current operating conditions of each terminal in a satellite network, identifying the optimal MODCOD for efficient spectral usage and reliable service delivery by using processing circuitry to analyze terminal capabilities and adjust MODCOD settings in real-time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a static multicast MODCOD configuration is used, then the system is simple to operate, but spectral efficiency deteriorates due to inability to adapt to varying terminal conditions
Solution Approach 1:
The patent implements dynamic MODCOD selection for multicast streams by determining the operating MODCOD of each terminal and selecting an optimal MODCOD based on current terminal conditions. The system periodically updates the multicast MODCOD assignment to adapt to changing channel conditions, transforming the static configuration into a dynamic adaptive system that optimizes spectral efficiency while maintaining operational simplicity through automated selection.
2Reliability
If lower order MODCODs are used to ensure service reliability, then service reliability improves, but bandwidth efficiency deteriorates
Solution Approach 1:
The patent changes the MODCOD parameter dynamically based on terminal operating conditions. By evaluating each terminal's current channel quality and capability, the system selects the appropriate MODCOD level, allowing terminals with good conditions to use higher order MODCODs for better bandwidth efficiency while ensuring terminals with poor conditions use lower order MODCODs for reliable service delivery.
3Productivity
If dynamic MODCOD adjustment is implemented, then spectral efficiency improves, but system complexity increases
Solution Approach 1:
The patent implements a feedback mechanism where terminals report their operating MODCOD and channel conditions to the satellite system. The system uses this feedback information to determine the optimal multicast MODCOD, creating a closed-loop control system that achieves dynamic adaptation without requiring complex centralized control, thereby managing system complexity through information feedback.
4Reliability
If multicast MODCOD is configured regardless of terminal operating conditions, then service availability improves, but bandwidth waste increases
Solution Approach 1:
The patent applies local quality by assigning different MODCOD levels to different terminals based on their individual operating conditions and capabilities. Instead of using a uniform multicast MODCOD for all terminals, the system tailors the MODCOD selection to each terminal's local channel characteristics, ensuring reliable service delivery to each terminal while optimizing overall bandwidth utilization across the network.
Data Source
AI summary
Provided is a method, system, and computer readable medium for satellite communication. The method includes determining an operating modulation and coding scheme (MODCOD) associated with each terminal of a plurality of terminals, the plurality of terminals being a part of an iNet; identifying an optimal MODCOD based on operating MODCODs associated with the plurality of terminals; associating the optimal MODCOD with the iNet; and transmitting a multicast stream to the plurality of terminals based on the optimal MODCOD.