LEO Satellite Traffic Replication via Predictive Outage Detection
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Solution Overview
Problem
Users of Low Earth Orbit (LEO) satellite networks experience temporary network outages due to impairments, leading to disruptions in services like video conferencing, which are unpredictable and often beyond user control, affecting productivity and user experience.
Innovation Solution
Implementing a system where a router maintains both a primary communication link over a LEO satellite network and a backup link, using predictive models and machine-learning to detect impending outages, and replicating traffic streams over the backup link to ensure continuous communication, utilizing encapsulation protocols like VXLAN or GRE to manage replicated traffic.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If LEO satellite networks are used to provide WAN connectivity to remote users, then network coverage and bandwidth are improved, but network reliability deteriorates due to temporary outages and impairments
Solution Approach 1:
The system performs preliminary actions by proactively replicating traffic streams before outages occur. The head-end router detects impending outages using predictive models and machine-learning algorithms, then pre-replicates critical traffic over alternative paths (terrestrial networks or other satellites) before the primary LEO satellite link fails, ensuring continuous service delivery
Solution Approach 2:
The system dynamically changes operational parameters by adjusting traffic replication based on detected outage conditions. When outages are detected or predicted, the system automatically activates backup paths and modifies traffic routing parameters, transitioning from single-path to multi-path communication to maintain service reliability
2Reliability
If traffic replication is implemented over backup links, then network reliability is improved, but device complexity increases due to multiple communication links and replication management
Solution Approach 1:
The system introduces intermediary components (head-end router with predictive capabilities, encapsulation protocols like VXLAN or GRE) that automate the complexity of managing multiple communication links. These intermediaries handle traffic replication, path selection, and outage detection, shielding end users from the underlying system complexity while maintaining high availability
Solution Approach 2:
The system creates copies of traffic streams over alternative paths when outages are detected or predicted. By replicating traffic data and transmitting it through backup links (terrestrial networks or other satellites), the system ensures service continuity without requiring complex real-time switching, as the backup copy is already in transit
Data Source
AI summary
Techniques for a proxy to replicate traffic being communicated between a client device and a destination device based on determining an outage or impairment in a LEO satellite network. The proxy may be communicating a traffic stream between a source device and a destination device using a primary WAN that includes the LEO satellite network. However, the proxy may determine that the primary WAN has experienced or will experience an outage or other impairment. In such examples, the proxy may then replicate the traffic stream and send the replicated traffic stream over a backup communication link. The backup communication link may a different path through the primary WAN, and/or may be a communication path through a secondary WAN. Once the outage or impairment has cleared, the proxy may stop replicating the traffic and again use the primary WAN to communicate traffic.