Data Transmission Time Minimization for LEO Satellite-Terrestrial Integrated Networks

In this paper, we investigate data transmission time minimization problem in low earth orbits (LEO) satellite-terrestrial integrated networks (STINs) with a central earth station (CES) for relay, which non-orthogonal multiple access (NOMA) scheme is used for data transmission from the Internet of Th...

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Vydáno v:International Conference on Wireless Communications and Signal Processing s. 642 - 647
Hlavní autoři: Gao, Zhixiang, Liu, Aijun, Liang, Xiaohu
Médium: Konferenční příspěvek
Jazyk:angličtina
Vydáno: IEEE 21.10.2020
Témata:
Data communication
data transmission time minimization
Low earth orbit satellites
many-to-one matching
min-max algorithm
Minimization
NOMA
Relays
Resource management
Satellites
ISSN:2472-7628
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Popis
Shrnutí:In this paper, we investigate data transmission time minimization problem in low earth orbits (LEO) satellite-terrestrial integrated networks (STINs) with a central earth station (CES) for relay, which non-orthogonal multiple access (NOMA) scheme is used for data transmission from the Internet of Things (IoT) devices to CES, and orthogonal multiple access (OMA) scheme is used for data transmission from CES to satellite. Firstly, to tackle this problem, we decouple this problem into two sub-problems: subcarriers assignment in terrestrial network and data allocation in satellite subcarriers. Secondly, we formulate the subcarriers assignment as a many-to-one matching, and proposed the matching algorithm for subcarriers assignment. To keep fairness in satellite channels, we make that the rate in each satellite subcarriers is the same, and propose a minmax algorithm to minimize the max completion time. Finally, the simulations have shown that our proposed scheme has better performance than the existing approach, and the NOMA scheme always outperforms the OMA scheme.
ISSN:2472-7628
DOI:10.1109/WCSP49889.2020.9299799