Satellite Programmable Bandwidth Allocation for Dynamic Traffic
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Solution Overview
Problem
Satellite communication systems face challenges in dynamically adjusting the forward-to-reverse data traffic ratio and bandwidth allocation due to changes in network usage patterns over time, as replacing transponders in orbit is expensive and impractical.
Innovation Solution
Implementing a programmable signal filtering facility in satellites that allows for altering the frequency bandwidth allocations and data rate ratios between forward and return links by receiving filter parameters, enabling flexible adjustment of frequency bands and data traffic capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If transponders are replaced in orbit to adjust bandwidth allocation, then bandwidth allocation adaptability is improved, but operation and maintenance cost increases significantly
Solution Approach 1:
The patent applies dynamics by making the transponder's frequency band allocation adjustable and reconfigurable through programmable signal filtering facilities. The system can dynamically change bandwidth allocation ratios between forward and return links by receiving filter parameters and reprogramming the signal filter, allowing the transponder to adapt to different traffic demands without physical replacement.
Solution Approach 2:
The patent implements parameter changes by modifying the operational parameters of the signal filter through programmable control. By changing filter parameters such as frequency band boundaries and bandwidth allocation ratios, the system achieves flexible bandwidth reallocation. This allows the transponder to adapt to varying traffic patterns by adjusting parameters rather than replacing hardware.
2Adaptability or versatility
If fixed bandwidth allocation is used in transponders, then device complexity is reduced, but adaptability to changing traffic patterns deteriorates
Solution Approach 1:
The patent applies universality by designing a multi-functional signal filtering facility that can handle multiple frequency bands and allocation ratios within a single transponder. The programmable signal filter can be reconfigured to serve different bandwidth allocation requirements, making the transponder universally applicable to various traffic patterns and service requirements without needing multiple specialized transponders.
3Productivity
If bandwidth allocation does not match actual traffic demand, then device complexity is simplified, but productivity and resource utilization deteriorate
Solution Approach 1:
The patent implements feedback by monitoring actual traffic demands and using this information to adjust bandwidth allocation dynamically. The system receives filter parameters based on traffic conditions and reconfigures the signal filter accordingly, creating a closed-loop control system that optimizes bandwidth utilization according to real-time traffic patterns and demands.
Data Source
AI summary
A satellite includes a programmable facility including circuitry responsive to programmable control information. One or more filter parameters, or other forms of instructions for allocating channel capacity (i.e. bits/second/Hz), are received at the satellite in orbit to direct the programmable facility to separate particular sub-signals from an input signal. In one embodiment, the programmable facility can be programmed to change the allocation of channel capacity dedicated to the forward and return links based on the ratio forward and return traffic through a satellite. Changing the allocation of channel capacity may be achieved by changing the portions of the total allocated frequency bandwidth that are used for forward and return links. Alternatively, the changes may be made to the forward and/or return data rates, either alone or in combination with frequency bandwidth allocations.