Dynamic Handover in Satellite-Terrestrial Integrated Networks

Dai, Cui‐Qin; Yang, Liu; Fu, Shu; Wu, Jinsong; Chen, Qianbin

doi:10.1109/gcwkshps45667.2019.9024370

Cited by 17 publications

(4 citation statements)

References 19 publications

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“…In satellite networks, a reasonable routing decision algorithm can make the routing path have a longer life cycle and converge faster. In order to solve the intermittent interruption caused by inter-satellite link changes, Dai et al [169] studied the prediction of logical topology and proposed a multi-attribute dynamic graph (MADG) scheme to find the optimal routing path. This scheme ensures that the selected path has a longer life cycle.…”

Section: Routing Mechanismmentioning

confidence: 99%

Threat analysis for space information network based on network security attributes: a review

Fan

et al. 2022

Complex Intell. Syst.

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Space Information Network (SIN) is a multi-purpose heterogeneous network. Due to the large-scale of SIN, its secure and stable operation is vulnerable to various threats. Much of current threat analysis for SIN is based on the network function or architecture. However, this approach cannot clearly divide the relation between threats and secure communication measures for a highly integrated network. Furthermore, it will lead to overlapping in segregation of secure duties. This paper presents a comprehensive review of threats and corresponding solutions in SIN from the perspective of network security attributes. In order to make the analysis applicable to more scenarios, the following three most essential attributes, confidentiality, integrity and availability, are selected as the threatened objectives. At the same time, for cross-reference with the analysis based on network function or architecture, this paper relates network layers to network security attributes through secure communication mechanisms. Specifically, the confidentiality includes confidential information-exchange and Authentication and Key Agreement (AKA), the integrity includes information identification and information restoration, and the availability includes link establishment, routing mechanism, and mobility management. According to above framework, this paper provides a cross-layer perspective for analyzing threat and enhancing the security and stability of SIN. Finally, this paper concludes with a summary of challenges and future work in SIN.

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Section: Routing Mechanismmentioning

confidence: 99%

Threat analysis for space information network based on network security attributes: a review

Fan

et al. 2022

Complex Intell. Syst.

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“…According to the design of LEO-SIN from the NTN project, LEO-SIN is composited by satellites, User Equipment (UE), Earth Station (ES), and channels as Figure 2 shows. In our assumptions, satellites would be the nodes with transparent forwarding, on-board signal regeneration, radio network accessing or switching, and routing [20,21]. Those functions of satellite nodes can be dynamically reconstructed.…”

Section: System Model Of Leo-sinmentioning

confidence: 99%

A Novel Simulation Modeling Method and Hardware Implementation for Doppler Power Spectrum of LEO Satellite Based on Error Compensations by Parting Sinusoid with Random AOA and Correlation Piecewise Convergence

Lin

Deng²,

Wang³

et al. 2021

Electronics

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Low Earth Orbit (LEO) Satellite Internet Network (LEO-SIN) is a promising approach to global Gigabit per second (Gbps) broadband communications in the coming sixth-generation (6G) era. This paper mainly focuses on the innovation of accuracy improvement of simulation modeling of the Doppler Power Spectrum (DPS) of satellite channels in LEO-SIN. Existing DPS modeling methods are based on Rice’s Sum-of-Sinusoids (SOS) which have obvious modeling errors in scenarios with main signal propagation paths, asymmetrical power spectrum, and random multi-path signals with a random Angle of Arrival (AOA) in LEO-SIN. There are few state-of-art researches devoted to higher accuracy of DPS modeling for simulation. Therefore, this paper proposes a novel Random Method of Exact Doppler Spread method Set Partitioning (RMEDS-SP). Distinct from existed researches, we firstly model the DPS of LEO-SIN, which more accurately describes the characteristics of frequency dispersion with the main path and multi-path signals with random AOA. Furthermore, piecewise functions to the Autocorrelation Function (ACF) of RMEDS-SP is first exploited to converge the modeling error supposition with time by periodic changes, which further improve the accuracy of the DPS model. Experimental results show that the accuracy of DPS in our proposed model is improved by 32.19% and 18.52%, respectively when compared with existing models.

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“…Hu et al [23] utilized the timeexpanded graph to predict handover for mobile users to avoid the handover prediction failure. Dai et al [24] proposed a handover scheme based on dynamic space-time graph and used Floyd algorithm to obtain the optimal solution.…”

Section: Introductionmentioning

confidence: 99%

A LEO Satellite Handover Strategy Based on Graph and Multiobjective Multiagent Path Finding

Zhiyun

Wang

et al. 2023

International Journal of Aerospace Engineering

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Low earth orbit (LEO) satellite network can provide services to users anywhere on the earth. However, the high-speed mobility of satellites leads to a dynamic environment, which brings challenges for handover and network performance optimization, especially in the scenario of multiuser using the networks meanwhile. In this paper, we exploit multiple directed graphs to model the handover process for multiuser. The nodes in a graph represent the satellites that the corresponding user may choose to access. The edges represent the possible handovers between adjacent timestamps. The path from the start node to the end node in each graph is the handover strategy of the corresponding user, and the path length is the reward that the user can get. Therefore, the handover strategy problem is transformed into a path planning problem. To minimize the average handover times, maximize the average received power, and minimize the average number of conflicts, we propose a novel handover strategy based on multiobjective multiagent path finding (MOMAPF). The simulated handover experiment on Starlink successfully derives the Pareto-optimal solution set, which corroborates the effectiveness of the proposed handover strategy. The results also show that the proposed strategy has better comprehensive performance than other strategies.

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Dynamic Handover in Satellite-Terrestrial Integrated Networks

Cited by 17 publications

References 19 publications

Threat analysis for space information network based on network security attributes: a review

Threat analysis for space information network based on network security attributes: a review

A Novel Simulation Modeling Method and Hardware Implementation for Doppler Power Spectrum of LEO Satellite Based on Error Compensations by Parting Sinusoid with Random AOA and Correlation Piecewise Convergence

A LEO Satellite Handover Strategy Based on Graph and Multiobjective Multiagent Path Finding

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