High speed and global store and forward communication system using LEO satellites

Low earth orbit (LEO) satellite systems, an important part of the next generation of global communication systems, have the advantages of low transmission delay, low satellite cost and low launch cost. The construction of an LEO satellite network with global coverage has become the direction of future space network transmission development. Although extensive research has been conducted on the routing of LEO satellite networks, most papers focus on only space segment routing, with little attention paid to the route between the satellite and ground station. This paper introduces the transmission scenario of ground station switching with connected satellites and analyzes the problem of data packet loss caused by ground station and satellite communication link switching. Two optimization strategies based on static routing and dynamic routing are proposed as solutions to the problem of data packet loss, with software-simulated test results showing that both approaches can effectively avoid packet loss.

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“…The centripetal force F required for the satellite to circle the earth is provided by gravity, which is derived from the following (2) [33].…”

Section: A Motion Model Of Leo Satellitementioning

confidence: 99%

Optimization Strategy to Solve Transmission Interruption Caused by Satellite-Ground Link Switching

Zhang

Zhu

Bai³

et al. 2020

IEEE Access

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“…Some links, especially for low-earth orbit (LEO) satellites, are inherently time varying in a deterministic manner and offer possibilities for increased performance by using adaptive methods. For example, inter-satellite links (ISLs) have been in use for decades in a variety of applications (see References [2][3][4]) and while recent research has focused on routing and network issues, at the physical layer there appears to be little attention to the question of how to optimize performance. This investigation was motivated by assuming that wireless ISLs are used in LEO orbits within a network of custom payloads that make relatively modest demands on the satellite platform in terms of power, mass, volume and pointing requirements.…”

Section: Introductionmentioning

confidence: 99%

Performance comparisons for adaptive LEO satellite links

Cowley

2006

Int. J. Satell. Commun. Network.

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SUMMARYThis paper considers the potential to achieve improved throughput in time-varying satellite links which have flexibility in information bit rate and/or transmit power. We assume that other parameters of the link budget such as antenna gains and operating frequency are fixed. Simple results are derived, which illustrate what improvements in data throughput or power consumption are possible under two low-earth orbit scenarios: inter-satellite links and satellite to ground communications.

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“…In addition to the applications noted previously, orbiting random number generators enable the implementation of a resource known as a randomness beacon 20 . While a number of randomness beacons are currently accessible via the internet 20,21 , an orbiting beacon would be available to remote infrastructures with only sporadic, high-latency internet access, for example, monitoring stations connected via store-and-forward satellite services 22,23 . These installations could then make use of beacon pulses in applications such as time-stamping algorithms to increase the integrity of record-keeping, or for auditable input to a sampling process 24 .…”

mentioning

confidence: 99%

A quantum random number generator on a nanosatellite in low Earth orbit

et al. 2022

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Quantum random number generators find applications in both quantum and classical communications schemes, particularly in security protocols where they can be used as a source of random seed or key material. In this work, we describe the implementation of a quantum random number generator on-board a nanosatellite deployed in low Earth orbit. Our generator samples shot noise from an entangled photon-pair source based on spontaneous parametric down-conversion, linking the entropy of the output to the quantization of the down-converted beam. We present analyzed data from the orbiting instrument alongside data taken from a ground-based engineering model where the statistical test suites indicate a good match to the output from a uniform distribution. Finally, we use the source to implement a prototype for an off-grid randomness beacon. This work paves the way to future low Earth orbit based public quantum randomness beacons.

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High speed and global store and forward communication system using LEO satellites

Cited by 5 publications

References 1 publication

Optimization Strategy to Solve Transmission Interruption Caused by Satellite-Ground Link Switching

Optimization Strategy to Solve Transmission Interruption Caused by Satellite-Ground Link Switching

Performance comparisons for adaptive LEO satellite links

A quantum random number generator on a nanosatellite in low Earth orbit

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