Time Estimation of the Link Stability in Inter-Satellite Optical Communications

Siyuan, 于思源 Yu; Shen, 闫珅 Yan; Liying, 谭立英 Tan; Jing, 马晶 Ma

doi:10.3788/cjl201542.1105004

Cited by 7 publications

(6 citation statements)

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“…• Connection Rate: the proportion of total link duration in a planning cycle, calculated by ( t j δ ′ i )/T . • Benefits: the total weighted data volume sent to CLSs, which is the objective value of (27). From TABLE V, some conclusions can be summarized as follows.…”

Section: A Results and Indicator Analysismentioning

confidence: 99%

“…Solve (27) subject to ( 19),( 22),( 30)-( 31),( 33)-(34) to obtain q i , M H i , taking δ ′ i as parameters;…”

Section: Distributed System Solution Approachmentioning

confidence: 99%

“…We assume each observation task of RLS takes 6-10 minutes, importance factor m ω i,m = 1 and ω i,t are generated by ω i,m . Other simulation parameters are listed in TABLE IV, referring to the data in [19], [26], [27]. The system is solved on a computer Dell 7080MT Optiplex with Intel(R) Core(TM) i7-10700 CPU@ 2.90GHz, 32GB RAM, Windows 11, and MATLAB R2022b.…”

Section: Simulation and Analysismentioning

confidence: 99%

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Task-Aware Distributed Inter-Layer Topology Optimization Method in Resource-Limited LEO-LEO Satellite Networks

Guo¹,

Liu²,

Zhong³

2023

Preprint

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<p>Due to the increasing demand for real-time observation data, remote-sensing satellites can be considered as users to access mega communication constellations, which can constitute a Low Earth Orbit (LEO) Double-Layered Satellite Network (DLSN) composed of Remote-sensing Layer Satellites (RLSs) and Communication Layer Satellites (CLSs). In this LEO DLSN, a Distributed Inter-Layer Topology Optimization (DITO) method is proposed based on time-space relationships between two layers, which can maximize task-aware observation benefits with limited onboard resources. For practical purposes, we take link switching interval constraints into account for the recapture and track of laser communicators. Besides, we put forward a new time-slot division method based on the link switching interval for the linear modeling of the time-sequential coupling problem. With the simulation results in four constellation systems, the proposed distributed interactive method can obtain an optimal solution close to the centralized global solution with much less time. Simulation analysis indicates that the work of this paper can support onboard optimization for future space networks.</p>

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Section: A Results and Indicator Analysismentioning

confidence: 99%

“…Solve (27) subject to ( 19),( 22),( 30)-( 31),( 33)-(34) to obtain q i , M H i , taking δ ′ i as parameters;…”

Section: Distributed System Solution Approachmentioning

confidence: 99%

Section: Simulation and Analysismentioning

confidence: 99%

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Task-Aware Distributed Inter-Layer Topology Optimization Method in Resource-Limited LEO-LEO Satellite Networks

Guo¹,

Liu²,

Zhong³

2023

Preprint

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“…Let da i,j,t be the logical variable of this constraint and describe it as: (11) where the azimuth calculation equations can be found in [31], and the azimuth range constraints can also be added to this model. 6) Transmitting Power Change Rate Constraint: Due to the rapid change of satellites' distances, the transmitting power has to be adjusted rapidly [25], [26]. But the change rate is limited by the laser transceiver.…”

Section: A Potential Inter-layer Link Modelmentioning

confidence: 99%

“…Especially in LEO DLSNs, the inter-layer communication challenge brought by the high-speed relative motion has not been considered. As pointed out in [25], [26], the relative velocity and position of satellites have significant effects on tracking and precision-pointing of laser communication. Besides, laser transceivers need a certain time for recapturing and tracking when performing link switching [27], [28].…”

Section: Introductionmentioning

confidence: 99%

Task-Aware Distributed Inter-Layer Topology Optimization Method in Resource-Limited LEO-LEO Satellite Networks

Guo,

Liu,

Zhong

2024

Preprint

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Due to the increasing demand for real-time observation data, remote-sensing satellites can be considered as users to access mega communication constellations, which can constitute a Low Earth Orbit (LEO) Double-Layered Satellite Network (DLSN) composed of Remote-sensing Layer Satellites (RLSs) and Communication Layer Satellites (CLSs). In this LEO DLSN, a Distributed Inter-Layer Topology Optimization (DITO) method is proposed based on time-space relationships between two layers, which can maximize task-aware observation benefits with limited onboard resources. For practical purposes, we take link switching interval constraints into account for the recapture and track of laser transceivers. Besides, we put forward a new time-slot division method based on the link switching interval for the linear modeling of the time-sequential coupling problem. With the simulation results in four constellation systems, the proposed distributed interactive method can obtain an optimal solution close to the centralized global solution with much less time. Simulation results indicate that the proposed method can support onboard optimization for future space networks.

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Introduction

2022

Optical Wireless Communication Theory and Technology

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Time Estimation of the Link Stability in Inter-Satellite Optical Communications

Cited by 7 publications

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Task-Aware Distributed Inter-Layer Topology Optimization Method in Resource-Limited LEO-LEO Satellite Networks

Task-Aware Distributed Inter-Layer Topology Optimization Method in Resource-Limited LEO-LEO Satellite Networks

Task-Aware Distributed Inter-Layer Topology Optimization Method in Resource-Limited LEO-LEO Satellite Networks

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