Satellite Transmitter Time Slice Selector
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Solution Overview
Problem
Current satellite communication systems face challenges in implementing time slicing efficiently, particularly in managing the bandwidth and throughput requirements for high-throughput satellites, where receivers with lower decoder throughput specifications struggle to process consecutive frames without packet loss, and existing solutions do not adequately address the need for sufficient time spacing between frames with different time slice numbers.
Innovation Solution
The proposed solution involves an earth station transmitter device that uses a time slice selector to manage virtual carrier baseband frames, allowing for continuous transmission without guard times by inserting dummy frames when necessary, and dynamically configuring virtual carrier symbol rates to ensure efficient multiplexing and decoding capabilities for receivers with lower throughput specifications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If time slicing is implemented to manage bandwidth for high-throughput satellites, then bandwidth utilization is improved, but receivers with lower decoder throughput specifications experience packet loss due to insufficient time between frames
Solution Approach 1:
The patent applies preliminary action by having the transmitter pre-calculate and insert dummy frames before actual data frames are transmitted. This ensures that sufficient time intervals are created between frames with the same time slice number, allowing receivers with lower decoder throughput specifications to process frames without packet loss, while still maintaining efficient bandwidth utilization through time slicing
2Productivity
If continuous transmission without guard times is used, then productivity is improved, but receivers cannot decode frames properly due to insufficient processing time
Solution Approach 1:
The patent uses dummy frames as intermediary elements between actual data frames. These dummy frames act as placeholders that create necessary time intervals without interrupting the continuous transmission stream. They mediate between the desire for continuous transmission and the need for receivers to have sufficient processing time, thereby maintaining both transmission efficiency and frame decoding capability
3Adaptability or versatility
If virtual carrier symbol rates are dynamically configured, then adaptability is improved, but system complexity increases
Solution Approach 1:
The patent applies dynamics by implementing dynamically configurable virtual carrier symbol rates that can be adjusted based on traffic conditions and receiver capabilities. The system can adaptively change the symbol rates of multiple virtual carriers within a physical carrier, allowing optimal resource allocation while maintaining manageability through structured control mechanisms
Data Source
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AI summary
The present invention relates to an earth station transmitter device (1) arranged for generating a signal to be transmitted to a plurality of earth station receiver devices (3) of a satellite communication system. The earth station transmitter device comprises - a plurality of shapers (100), each arranged for shaping and encapsulating data traffic to a different subset of earth station receiver devices, so obtaining for each subset a virtual carrier outputting at a virtual carrier symbol rate a plurality of virtual carrier baseband frames, - a modulator (104) comprising a time slice selector (102) arranged for receiving and storing said virtual carriers outputted by said plurality of shapers, for selecting a stored virtual carrier baseband frame from a list of allowable virtual carriers as next frame to be multiplexed on a single stream, and for assigning to said selected virtual carrier baseband frame, from a list of allowable time slice numbers, a time slice number associated to the virtual carrier to which said selected virtual carrier baseband frame belongs, said modulator further comprising encoding and modulation means (103) to convert said single stream into symbols of a continuous physical carrier to be transmitted at a physical carrier symbol rate greater than or equal to the sum of said virtual carrier symbol rates, - a central unit (107) arranged for conveying to each shaper of said plurality its virtual carrier symbol rate and for conveying to said modulator a list of possible time slice numbers for each of said virtual carriers.