Enhancing Transmission Efficiency of Mega-Constellation LEO Satellite Networks

Lü, Yong; Zhao, Youjian; Sun, Fuchun; Yang, Faquan; Liang, Ruishi; Shen, Jun; Zuo, Zhihong

doi:10.1109/tvt.2022.3197321

Cited by 22 publications

(8 citation statements)

References 39 publications

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“…Furthermore, the satellite attitude in these studies is always regarded as a zero attitude. Some researchers simply assumed that the antennas used for the inter-plane ISLs are located at both sides of the pitch axis [13,14]. However, considering the shading of solar wings, cameras, antennas, and so on, the antennas used for the interplane ISLs may be installed at sides of the roll or yaw axes.…”

Section: Literature Reviewmentioning

confidence: 99%

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Onboard Centralized ISL-Building Planning for LEO Satellite Constellation Networks

et al. 2023

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Large-scale low earth orbit (LEO) satellite constellation projects are increasingly adopting inter-satellite links (ISLs) to enable their autonomous and collaborative operation. Due to the large number of satellite constellation network nodes and their continuous movement in orbit, the network nodes may not remain visible to each other at all times, so the ISL-building choices among satellites are diverse and vary with time. As a result, maintaining a network topology requires onboard planning and management. In this paper, we creatively propose an onboard centralized ISL-building planning scheme with the goal of autonomous topology management. A multi-antenna visibility calculation method that takes the antenna installation angle and the turntable rotation threshold into account is provided for the visibility calculation procedure. Additionally, the link-building planning process is modeled using integer linear programming (ILP); however, to tackle the computational complexity problem of ILP, a link-building planning method based on topology stability optimization is presented. The simulation results show that the proposed onboard centralized ISL-building planning scheme can operate among satellites to successfully realize network status collection, visibility calculation, link-building planning, and planning result distribution, as conducted by the dynamic primary satellite. Moreover, the inter-plane link-building planning method based on topology stability optimization improves the network topology stability on the basis of reducing the network delay.

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Section: Literature Reviewmentioning

confidence: 99%

“…In this study, the end-to-end delay includes the table-lookup delays of all forwarding nodes and ISL latency of wireless signal propagation on the routing path. For the end-to-end delay, we adopt the hop-count metric [14,31,32].…”

Section: Modelingmentioning

confidence: 99%

Onboard Centralized ISL-Building Planning for LEO Satellite Constellation Networks

et al. 2023

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“…Recently, LEO satellites have become a crucial component of satellite communication technology 1–3 . For example, several LEO constellations, such as OneWeb, Starlink, and Telesat, 4–6 are under construction with the aim of providing global seamless coverage and diverse services. However, the limited frequency spectrum resources means these satellites share the same spectrum to offer services for ground users.…”

Section: Introductionmentioning

confidence: 99%

Joint beam power and pointing management in multi‐beam low earth orbit and low earth orbit co‐existing satellite system

He,

Cui,

et al. 2024

Satell Commun Network

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SummaryRecently, the low earth orbit (LEO) satellite has attracted much attention due to its advantages of low latency and construction costs. However, the scarcity of frequency spectrum resources has resulted in these satellites sharing the same spectrum to provide services for ground users. So, challenges such as overlapping beam coverage and inter‐beam interference occur in the multi‐beam LEO satellite coexistence scenario. Therefore, this paper focuses on the issue of interference coexistence in LEO and LEO (LEO–LEO) co‐existing scenario, where the initially established system is the primary system, and the later established system is the secondary system. The interference coexistence problem is modeled as a multi‐objective optimization problem. The joint beam power and pointing management (JBPPM) based on particle swarm optimization (PSO) is proposed. The power control is applied to the LEO satellites in the secondary system to reduce the interference to the primary system user. Meanwhile, beam pointing optimization is adopted by the LEO users in the secondary system to avoid interference from the primary system and ensure the minimum communication ability. The simulation results verify that the proposed technique can adapt to various coexistence conditions and outperform the existing method.

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“…Yan et al [20] analyzed the inter-layer topology and link establishment strategy of MEO-LEO DLSNs. Lu et al [21] optimized LEO DLSNs with the same inclined orbit from the view of constellation structure. Huang et al [22] proposed an inter-layer link allocation scheme in MEO-LEO DLSNs, based on the weighted sum of multiple objectives.…”

Section: Introductionmentioning

confidence: 99%

“…However, both [20] and [21] focus on the constellations' structures, but are not applicable for remote-sensing satellites in solar synchronous orbits. Besides, to the best of the authors' knowledge, all existing link allocation researches [17]- [19], [22], [23] judged potential links with rough connectable conditions.…”

Section: Introductionmentioning

confidence: 99%

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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Enhancing Transmission Efficiency of Mega-Constellation LEO Satellite Networks

Cited by 22 publications

References 39 publications

Onboard Centralized ISL-Building Planning for LEO Satellite Constellation Networks

Onboard Centralized ISL-Building Planning for LEO Satellite Constellation Networks

Joint beam power and pointing management in multi‐beam low earth orbit and low earth orbit co‐existing satellite system

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

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