Forward–Return Satellite Link Scheduling with Dynamic MCS Allocation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Satellite networks face challenges in managing limited spectral resources and ensuring efficient connectivity for a large number of users with varying data rates and timing requirements, particularly for voice data communication.
Innovation Solution
A method and system for scheduling forward and return link resource allocations in satellite communication by determining link quality, data rate requirements, and modulation and coding schemes, and adjusting transmission power to meet timing and data requirements while minimizing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If satellite networks allocate more spectral resources to support a large number of users with varying data rates, then the quantity of users served increases, but the limited spectral resources become insufficient and resource allocation complexity increases
Solution Approach 1:
The patent segments the resource allocation process into separate forward link and return link scheduling operations. The base station independently determines forward link resource allocations based on downlink channel conditions and return link resource allocations based on uplink channel conditions, allowing parallel optimization without mutual interference and reducing overall allocation complexity
Solution Approach 2:
The patent implements dynamic resource allocation where the base station continuously monitors forward link quality metrics (such as downlink channel state information) and return link quality metrics (such as uplink channel state information), and adjusts modulation and coding schemes (MCS) and resource block allocations in real-time to adapt to changing channel conditions and user requirements
2Manufacturing precision
If satellite networks implement rigid timing for voice data communication, then timing precision is improved, but adaptability to varying data rate requirements deteriorates
Solution Approach 1:
The patent employs dynamic modulation and coding scheme selection that allows the system to maintain rigid timing structures while adapting to varying data rate requirements. By adjusting MCS based on channel conditions and user needs, the system can vary effective data rates within the fixed timing framework, achieving both timing precision and adaptability
Solution Approach 2:
The patent changes key transmission parameters (modulation order, coding rate, resource block allocation) dynamically based on forward link quality and return link quality assessments. This allows the system to maintain precise timing while adapting data rates to match user requirements and channel conditions
3Productivity
If satellite networks increase transmission power to meet data rate requirements, then data rate achievement is improved, but interference to other users increases
Solution Approach 1:
The patent applies local quality optimization by determining transmission power and resource allocation individually for each user equipment based on its specific channel conditions, quality requirements, and interference environment. This allows high data rates for users who need them while limiting power for users with good channel conditions, reducing overall interference
Solution Approach 2:
The patent implements feedback-based power control where the base station monitors return link quality metrics and adjusts forward link transmission power accordingly. This closed-loop approach ensures data rate requirements are met while automatically reducing power when interference levels become excessive or when channel conditions improve
Data Source
AI summary
Apparatuses, methods, and systems of scheduling wireless communication through a satellite link are disclosed. One method includes determining a forward link quality of a forward link and a return link quality of a return link, determining a forward data rate requirement for a forward timing interval and a return data rate requirement for a return timing interval, determining a modulation and coding scheme (MCS) of the forward link based on the forward link quality, the return link quality, the forward data rate requirement, the return data rate requirement, a MCS of the return link, the forward timing, and the return timing interval, scheduling forward link resource allocations and return link resource allocations based on the MCS of the forward link, the MCS of the return link, forward data rate requirement and a return data rate requirement, the forward timing interval, and the return timing interval.