Satellite Beam Hopping Capacity Allocation Method
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Solution Overview
Problem
Communication satellites face challenges in uniformly distributing capacity across different geographic zones due to varying user demand, leading to underutilization in low-demand areas and insufficient capacity in high-demand areas, while also requiring minimal hardware and flexibility to adapt to changing demand patterns.
Innovation Solution
A method for distributing satellite capacity by defining capacity needs for each beam based on user density, forming groups of beams with similar average capacity, and allocating resources to minimize the number of amplifiers and antennas required, while allowing for flexible reconfiguration based on demand variations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If uniform capacity distribution is implemented across all spots, then simplicity of capacity allocation is improved, but underutilization in low-demand areas and insufficient capacity in high-demand areas occurs
Solution Approach 1:
The patent implements non-uniform capacity distribution by allocating different bandwidth resources to different spots based on their specific demand characteristics. High-density spots receive larger bandwidth allocations while low-density spots receive smaller allocations, allowing each local region to have quality tailored to its actual communication needs rather than applying a uniform standard across all areas.
2Productivity
If spots of different sizes are used to match user density, then capacity distribution is improved, but boundary interference between spots increases
Solution Approach 1:
The patent segments the total coverage zone into multiple spots of uniform geometric size, each served by dedicated beams. This segmentation approach avoids the boundary interference problems that would arise from creating irregularly shaped spots of different sizes, while still enabling non-uniform capacity distribution through differential bandwidth allocation to each standardized spot.
3Adaptability or versatility
If multiple antennas of different reflector sizes are deployed, then spot coverage flexibility is improved, but number of antennas and system complexity increases
Solution Approach 1:
The patent employs multiple antennas with identical reflector sizes and beamforming capabilities, where each antenna can serve multiple spots through electronic beam steering. This universal antenna design eliminates the need for different-sized reflectors for different spot sizes, reducing the total number of antennas required while maintaining the flexibility to serve various spot configurations through software-controlled beam allocation.
4Measurement precision
If narrow filters are used for low-demand spots, then capacity allocation precision is improved, but hardware complexity and cost increases
Solution Approach 1:
The patent replaces physical narrow-band filters with software-based beamforming and frequency assignment mechanisms. Instead of using complex hardware filters to allocate capacity precisely to different spots, the system uses electronic beam steering and digital signal processing to achieve precise capacity allocation, thereby avoiding the hardware complexity and cost associated with implementing narrow physical filters for each spot.
Data Source
AI summary
A method for defining the flexible payload of a telecommunications satellite with low-interference-level beam hopping includes: a first step of defining the capacity from which each beam must benefit on account of the density of exchanges to be delivered by the beam; a second step of determining, depending on the various power-amplifier sharing schemes, the maximum number Pi of beams that an amplifier is able to deliver and the average capacity allocated to each beam; a third step of forming groups of beams, each characterized by the average value of the cumulative capacity of the beams that form it, and determining the number of amplifiers required for each formed group; a fourth step, during which the various beams are distributed between various amplifiers, in such a way that the average value of the load placed on these beams is substantially equal to the average load of the group in question.