Gateway Diversity for Satellite Network Reliability
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Solution Overview
Problem
Satellite communication systems face challenges in maintaining quality of service due to environmental conditions and system load imbalances, as conventional VSATs are limited to a single gateway, leading to service interruptions and reduced quality during adverse conditions.
Innovation Solution
A method and system that allow diverse terminals to selectively use different gateways based on link conditions and load imbalances, assigning diverse channel sets with forward channels from primary and secondary gateways, enabling terminals to reconfigure and switch between gateways to maintain service quality and balance loads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a VSAT is linked to a particular gateway for all communications, then the link is stable and easy to manage, but the system cannot handle service interruptions or load imbalances effectively
Solution Approach 1:
The VSAT is configured with multiple channel sets (primary and secondary) that can be used to communicate with different gateways. The terminal can selectively activate different channel sets based on service conditions, allowing it to switch between home gateway and foreign gateway communications, thus achieving multi-functionality and improved service continuity
2Device complexity
If each VSAT has a fixed link to a gateway, then the system configuration is simple, but load distribution among gateways becomes difficult to manage
Solution Approach 1:
The system implements dynamic gateway selection where VSATs can switch between primary and secondary channel sets based on real-time conditions. The network controller monitors system state and directs terminals to use appropriate channel sets, enabling flexible load distribution across multiple gateways while maintaining relatively simple individual terminal configurations
3Ease of operation
If VSATs use a single gateway, then the communication setup is straightforward, but service quality deteriorates during environmental disturbances
Solution Approach 1:
The system pre-configures secondary channel sets as backup pathways before service interruptions occur. When environmental conditions degrade service quality on the primary channel, the network controller directs the VSAT to switch to the pre-configured secondary channel set, providing cushioning against service degradation without requiring complex real-time reconfiguration
Data Source
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AI summary
A method and system for selectively using different gateways with a diverse terminal includes assigning a diverse channel set to each of a plurality of diverse terminals, and designating a primary gateway and a secondary gateway as either a home gateway or a foreign gateway for the each diverse terminal. During normal operations, link conditions for the channel between each diverse terminal and its home gateway are monitored. Diverse terminals can be reconfigured to communicate with a different their link conditions fall below a predetermined threshold.