Community Gateway Antenna Switching for Continuous ISP Satellite Backhaul
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Solution Overview
Problem
In locations without traditional Internet access, it is not feasible or affordable for individuals or institutions to install sufficient user terminals for satellite communication, necessitating a high-throughput link via an Internet Service Provider (ISP) using a satellite communication system.
Innovation Solution
Implementing a community gateway with multiple high-throughput gateway terminal antennas and a network switch to manage satellite mesh topology, allowing direct inter-satellite communication and reducing downtime by leveraging commercial off-the-shelf network switch capabilities to handle rollover between antennas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single gateway terminal antenna is used for high-throughput satellite communication, then the system complexity and cost are reduced, but the downtime increases due to mechanical slewing requirements between satellite passes
Solution Approach 1:
The system divides the gateway function into multiple independent antenna segments (first gateway terminal antenna and second gateway terminal antenna) that can operate independently. Each antenna handles satellite passes separately, eliminating the need for complex coordination between antennas while maintaining continuous connectivity through parallel operation
Solution Approach 2:
A network switch acts as an intermediary device that automatically routes data packets between the ISP router and the appropriate gateway terminal antenna based on real-time connection status. This intermediary handles the coordination logic, freeing the antennas from complex inter-communication requirements while ensuring seamless failover
2Reliability
If multiple gateway terminal antennas are deployed to reduce downtime, then the connection availability improves, but the complexity and cost of coordination between antennas increases
Solution Approach 1:
Each gateway terminal antenna independently monitors its own connection status to satellites and autonomously determines when it needs to switch states. The antennas self-manage their operational state without requiring complex inter-antenna communication or coordination protocols
Solution Approach 2:
The network switch serves as a centralized intermediary that receives connection status information from all antennas and automatically routes traffic accordingly. This centralizes the coordination logic in a simple device that does not require complex inter-antenna communication, simplifying operation
3Device complexity
If the gateway-wavelength antenna is used for both community gateway communication and conventional gateway terminal communication, then the system complexity is reduced, but conflicts occur that prevent simultaneous communications
Solution Approach 1:
The system segments the communication functions by deploying separate gateway terminal antennas dedicated to ISP backhaul communication, distinct from the community gateway's gateway-wavelength antenna. This physical segmentation eliminates resource conflicts and enables simultaneous operations without interference
Solution Approach 2:
The satellite's gateway-wavelength antenna maintains its universal function of communicating with both community gateways and conventional gateway terminals, while the dedicated gateway terminal antennas provide specialized ISP backhaul capability. This multi-functionality approach allows the satellite antenna to serve multiple purposes without conflict
Data Source
AI summary
A community gateway for a satellite communication system can include a network switch configured to route data packets received from an Internet Service Provider (ISP); and a plurality of community gateway (CGW) antennas. The satellite communication system includes terrestrial gateway terminals in communication with the Internet. Each CGW antenna is configured to communicate with the satellites via a CGW-SAT link, and each CGW antenna includes a network interface processor configured to route data packets between the network switch and the CGW antenna. The network interface processor is configured to report to the network switch a connection status of a connection between the CGW antenna and a node of the satellite communication system. The network switch is configured to route the data packets to the CGW antennas for transmission through the satellite communication system based on the reported connection status of the CGW antennas.