What is the handover strategy between satellites in a LEO constellation for continuous service?
LEO Handover
Inter-satellite links (ISLs) add another dimension to handover: traffic can be routed through the constellation mesh between satellites, so a handover at the user terminal does not necessarily require a handover at the gateway. This reduces the gateway handover frequency and enables global routing without ground relays. SpaceX's Starlink V2 satellites include laser ISLs operating at 100+ Gbps, enabling global mesh networking above the atmosphere.
| Parameter | GEO | MEO | LEO |
|---|---|---|---|
| Altitude | 35,786 km | 2,000-35,786 km | 200-2,000 km |
| Latency (one-way) | ~270 ms | 50-150 ms | 1-20 ms |
| Coverage per Sat | Full hemisphere | Regional | Local footprint |
| Handover | None | Periodic | Frequent |
| Path Loss (Ku-band) | ~206 dB | 190-206 dB | 170-190 dB |
Link Budget Allocation
When evaluating the handover strategy between satellites in a leo constellation for continuous service?, engineers must account for the specific requirements of their target application. The optimal choice depends on the frequency range, power level, environmental conditions, and cost constraints of the overall system design.
Propagation Effects
When evaluating the handover strategy between satellites in a leo constellation for continuous service?, engineers must account for the specific requirements of their target application. The optimal choice depends on the frequency range, power level, environmental conditions, and cost constraints of the overall system design.
- Performance verification: confirm specifications against the application requirements before finalizing the design
- Environmental factors: temperature range, humidity, and vibration affect long-term reliability and parameter drift
- Cost vs. performance: evaluate whether the application demands premium components or standard commercial grades
Terminal Requirements
When evaluating the handover strategy between satellites in a leo constellation for continuous service?, engineers must account for the specific requirements of their target application. The optimal choice depends on the frequency range, power level, environmental conditions, and cost constraints of the overall system design.
Frequently Asked Questions
How does handover affect latency?
During a well-executed make-before-break handover: the latency increase is minimal (< 50 ms). During a break-before-make handover: there is a brief outage (100-500 ms) that may cause TCP retransmissions and noticeable glitches in real-time applications. The network-level protocol stack must handle these transitions gracefully with buffering and multi-path redundancy.
What happens at high latitudes?
At high latitudes (> 60°), inclined-orbit LEO satellites have more frequent overpasses and longer visibility windows, actually improving the handover situation. Polar regions may have coverage gaps with non-polar orbits (the Starlink constellation includes a polar shell for coverage at > 70° latitude).