Multibeam Satellite Dynamic Frequency Routing
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Solution Overview
Problem
Current multibeam telecommunications systems reserve excessive bandwidth and complicate handover processes due to fixed frequency channel configurations and the need for frequent modem reconfigurations as mobile users move between beams.
Innovation Solution
A multibeam telecommunications satellite with a reconfigurable payload that dynamically routes microwave signals and frequency transposes them to maintain a single frequency channel for mobile user terminals, optimizing bandwidth usage and simplifying handover procedures through a combination of routing and transposition modules.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a dedicated bandwidth is reserved for each user terminal for each possible path between the user spot and the docking station, then the monitoring of established communications is guaranteed without interruption of service, but the bandwidth reserved is much higher than that actually used
Solution Approach 1:
The patent implements dynamic bandwidth allocation where the system transitions from static reserved bandwidth to dynamic on-demand allocation. The satellite payload dynamically configures routing paths and allocates bandwidth only when needed for handover operations, allowing the same physical bandwidth to serve multiple users at different times, thus reducing total bandwidth requirements while maintaining communication continuity.
Solution Approach 2:
Instead of reserving full bandwidth for all possible paths simultaneously (excessive action), the system reserves bandwidth partially and only activates specific paths when handover is actually needed. The bandwidth is allocated temporarily for the duration of handover operations and then released, ensuring communication reliability without permanently consuming excessive bandwidth resources.
2Adaptability or versatility
If multiple frequency channels are reserved on the anchor station side to cover different positions of mobile user terminals, then all positions are covered, but only a fraction of the reserved frequency band is used at any given time
Solution Approach 1:
The patent makes the anchor station's frequency resources universal by implementing a single frequency channel that can serve any user terminal position through dynamic routing. Instead of dedicating specific frequency channels to specific positions, the system uses one flexible frequency channel that can be dynamically configured to serve different terminals as they move, allowing the same frequency resource to perform multiple functions and serve different users at different times.
Solution Approach 2:
The system changes the parameter of frequency channel configuration from static multi-channel to dynamic single-channel. The single frequency channel dynamically changes its routing parameters and associated user spot accesses based on real-time terminal positions, allowing the system to maintain full coverage capability while using only one frequency channel at a time, thus optimizing frequency band utilization.
3Reliability
If the frequency plan uses M colors with no overlap between colors, then each beam has a dedicated frequency band, but the modem of the user terminal must be reconfigured each time the mobile user changes beam
Solution Approach 1:
The patent merges multiple beam-specific frequency channels into a single unified frequency channel on the anchor station side. Instead of maintaining separate frequency channels for each beam (which causes modem reconfiguration), the system combines all beam communications into one frequency channel and uses dynamic routing to direct traffic to the appropriate user spot access, thereby eliminating the need for modem reconfiguration during handover while maintaining beam-specific communication stability.
Solution Approach 2:
The patent introduces a routing module as an intermediary between the single frequency channel and multiple user spot accesses. This intermediary dynamically directs the single frequency channel's resources to the appropriate user spot access based on the terminal's current beam position, acting as a mediator that maintains communication stability without requiring terminal modem reconfiguration, thus simplifying handover while preserving beam-specific reliability.
4Ease of manufacture
If fixed routing configuration is used between anchor spot access and user spot accesses, then the system structure is simple, but the system cannot adapt to mobile user terminal movement between beams
Solution Approach 1:
The patent transforms the static routing configuration into a dynamic one where the routing module can automatically reconfigure paths between the anchor spot access and user spot accesses based on real-time terminal positions. This dynamic capability allows the system to adapt to user mobility while maintaining a relatively simple overall structure, as the complexity is managed through automated control rather than manual reconfiguration.
Data Source
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AI summary
Multibeam telecommunications satellite (22) comprising a reconfigurable payload, at least one anchor spot access (221) and a plurality of user spot accesses (222) in which, for a given mobile terminal (23), said anchor spot access is associated with a single frequency channel (250) and said user spot accesses are each associated with a frequency channel, and in which the payload comprises at least one routing module configured to dynamically route the user spot access to the anchor spot access associated with the anchor station (21) and vice versa depending on the position of the mobile terminal and a transposition module configured to frequency transpose the microwave signals from the user spot accesses to the frequency associated with the frequency channel of the anchor spot access and vice versa, the transposition of the signals for a given mobile terminal always being to the same frequency.