Abstract
We present an analytical model for computing call-blocking probabilities in a low earth orbit (LEO) satellite network that carriers voice calls. Both satellite- and earth-fixed constellations with interorbit links and handoffs are considered. In this model, we assume a single beam per satellite. Also, we assume that call arrivals are Poisson with a fixed arrival rate that is independent of the geographic area. The model is analyzed approximately by decomposing it into subsystems. Each subsystem is solved in isolation exactly using a Markov process and the individual results are combined together through an iterative method. Numerical results demonstrate that our method is accurate for a wide range of traffic patterns. We also derive an upper and lower bound for the link-blocking probabilities that can be computed efficiently. These bounds can be used for constellations of realistic size where each satellite has multiple beams.
Original language | English |
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Pages (from-to) | 622-636 |
Number of pages | 15 |
Journal | IEEE Transactions on Vehicular Technology |
Volume | 52 |
Issue number | 3 |
DOIs | |
Publication status | Published - May 2003 |
Externally published | Yes |
Keywords
- Call blocking
- Handoffs
- Low earth orbit (LEO) satellite constellations