Dynamic Resource Allocation for Satellite Terrestrial Co-Channel Sharing
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Solution Overview
Problem
Current satellite and terrestrial radio services face interference issues when sharing the same frequency band, particularly due to the use of omni-directional antennas by terrestrial services, leading to inefficient resource allocation and restricted frequency usage for satellite services.
Innovation Solution
A method for allocating resources, such as frequency and power, between satellite and terrestrial systems based on user demand ratios, where the number of users and power per user are considered to dynamically allocate RF power and frequency usage, ensuring efficient co-channel sharing while minimizing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If satellite and terrestrial services use the same frequency band, then resource utilization efficiency is improved, but interference between services occurs
Solution Approach 1:
The patent implements dynamic resource allocation where the satellite system and terrestrial system continuously monitor and adjust their frequency usage based on real-time conditions. The satellite handsets dynamically select frequencies that are currently available in their local area, and the system adapts to changing terrestrial usage patterns, thereby resolving the contradiction between sharing frequencies and avoiding interference.
Solution Approach 2:
The patent applies local quality by allowing frequency sharing on a localized basis rather than globally. Each satellite handset determines availability of frequencies based on its specific geographic location and the presence of terrestrial systems in that local area. This enables different frequency assignments in different locations, allowing overall resource utilization improvement while preventing interference in specific local contexts.
2Object-affected harmful factors
If satellite services are denied frequency usage in areas with terrestrial systems, then interference is avoided, but satellite service coverage area is reduced
Solution Approach 1:
The system dynamically determines satellite service availability in different geographic areas based on real-time terrestrial system presence. Rather than statically denying satellite service in entire regions, the system allows satellite handsets to operate on frequencies that are currently available in their specific location, thereby maintaining coverage area while avoiding interference through dynamic adaptation.
Solution Approach 2:
The patent segments the frequency allocation decision-making process by individual satellite handsets and locations. Each satellite handset independently determines which frequencies are available in its local area, rather than applying a blanket denial across the entire satellite service area. This segmentation allows satellite service to continue in areas where terrestrial systems are not present while avoiding interference where they are present.
3Area of stationary object
If terrestrial services use omni-directional antennas, then coverage area is improved, but frequency sharing with satellite services becomes problematic
Solution Approach 1:
The patent implements dynamic frequency selection where satellite handsets continuously monitor terrestrial system activity and adjust their frequency choices accordingly. This dynamic approach allows terrestrial systems to maintain their beneficial omni-directional antenna coverage while satellite services adapt in real-time to avoid causing or receiving interference, resolving the contradiction through temporal adaptation rather than spatial restriction.
Data Source
AI summary
There is provided a method for improving an allocation of resources, i.e., frequency and power, to terrestrial services and satellite services that use a same frequency band. The method includes determining a demand (DS) for a resource by users of a satellite system, determining a demand (DT) for the resource by users of a terrestrial system, and allocating the resource between the satellite system and the terrestrial system based on a ratio of DS to DT.