Abstract
This paper studies the communication problem at the counter-rotating seam of the low-orbit satellite based on the walker constellation. The counter-rotating seam has a short life cycle, low capacity, and dynamic geometric parameters. To better utilize the scarce link resources at the seam, increase network throughput, and approach the physical limits of the link throughput at the seam, an initial phase condition that maximizes the relative rotational joint link throughput is calculated. In the experimental simulation results using the Iridium system as an example, it is shown that better throughput can be obtained under the initial conditions, and the throughput is improved by about 30%.
Highlights
Large-span real-time communications under current global coverage of low-orbit satellite networks provide lower latency performance for communications than terrestrial networks
This paper studies the communication problem at the counter-rotating seam of the low-orbit satellite based on the walker constellation
In the experimental simulation results using the Iridium system as an example, it is shown that better throughput can be obtained under the initial conditions, and the throughput is improved by about 30%
Summary
Large-span real-time communications under current global coverage of low-orbit satellite networks provide lower latency performance for communications than terrestrial networks. If the inter-satellite link at the counter-rotation seam is considered, the propagation delay of the communication may be greatly reduced, and the average network delay is reduced by nearly 50% [3]. The lack of inter-satellite links at the dynamic counter-rotation seam limits the delay in satellite network delay, and limits the reliability of communication and the throughput of the network. The main reason for limiting the reliability of communication is that the earth’s rotation leads to the rapid movement of the reverse gap coverage area (the equatorial attachment is 1677 km/h) Under such rapid movement, the switching of the satellite link near the reverse gap may lead to the delay of real-time communication service. How to efficiently utilize the link resources in the counter-rotation seam to improve the link throughput, so that it no longer becomes a limitation of the network service capability
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