Satellite Beamforming for Dynamic Multi-Area Coverage Allocation
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Solution Overview
Problem
Existing satellite communications systems lack flexibility in adjusting service coverage areas and spot beam arrangements due to inflexible capacity distribution and uniform resource allocation, which limits adaptability to changing user demands and deployment conditions.
Innovation Solution
Implementing end-to-end beamforming with multiple areas of simultaneous user coverage using a satellite as a relay, utilizing geographically distributed access nodes and dynamic allocation of transponders between user link feed arrays to form and switch forward and return beams, enabling flexible capacity allocation based on channel estimates and user terminal locations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If uniform capacity distribution is used across service coverage area, then simple capacity allocation is achieved, but flexibility to adapt to changing user demands is reduced
Solution Approach 1:
The patent implements dynamic capacity allocation by allowing the satellite to reconfigure spot beam coverage areas and allocate transponders in real-time based on changing user demands. The system can dynamically adjust the number of active spot beams, their locations, and transponder assignments to match actual traffic patterns, transforming a static uniform allocation into a dynamic adaptive allocation mechanism.
Solution Approach 2:
The patent changes key parameters including spot beam locations, beam widths, and transponder allocation ratios based on detected user terminal positions and traffic conditions. By varying these parameters dynamically, the system achieves flexible capacity distribution without requiring complete system redesign, resolving the contradiction between adaptability and complexity.
2Adaptability or versatility
If spot beam coverage areas are fixed in location, then simple beam configuration is achieved, but ability to move beams to accommodate service coverage changes is lost
Solution Approach 1:
The patent implements dynamic beamforming where spot beams can be electronically steered and repositioned without physical antenna movement. The system dynamically adjusts beam directions and coverage areas based on user terminal locations, enabling flexible adaptation to changing service requirements while maintaining relatively simple beam configuration through digital signal processing.
Solution Approach 2:
The patent replaces mechanical antenna repositioning with electronic beamforming techniques. Instead of physically moving antennas to change coverage areas, the system uses electronic signal processing to dynamically steer beams, achieving beam movement capability while keeping the physical antenna structure simple and fixed.
3Adaptability or versatility
If predetermined bandwidth is allocated to every spot beam, then simple bandwidth allocation is achieved, but flexibility in capacity allocation is reduced
Solution Approach 1:
The patent implements dynamic bandwidth allocation where transponder bandwidth can be dynamically assigned to different spot beams based on actual traffic demands. Instead of fixed predetermined bandwidth, the system can allocate varying bandwidth portions to different coverage areas in real-time, achieving flexible capacity distribution through dynamic transponder assignment.
Solution Approach 2:
The patent changes the bandwidth allocation parameter from fixed predetermined values to dynamic variable values. The system adjusts transponder bandwidth assignments based on detected user demands and traffic patterns, allowing flexible capacity allocation while managing complexity through automated parameter adjustment algorithms.
Data Source
AI summary
A satellite communications system and method of operation provides service to pluralities of user terminals in multiple non-overlapping user coverage areas, based on performing ground-based, end-to-end beamforming simultaneously with respect to the multiple user coverage areas. A satellite communications system and method of operation provides service to pluralities of user terminals in multiple non-overlapping user coverage areas, based on performing ground-based, end-to-end beamforming simultaneously with respect to the multiple user coverage areas. The system provides a number of simultaneous beams in the forward or reverse directions and controlling the allocation of beams to respective user coverage areas determines the capacity allocations for the respective user coverage areas. A multiplicity of transmit/receive paths onboard a satellite in the system supports the end-to-end beamforming and controlling the beam allocations is based on controlling the allocation of such paths to the respective user coverage areas.