Virtual topology dynamics and handover mechanisms in Earth-fixed LEO satellite systems

Korçak, Ömer; Alagöz, Fatíh

doi:10.1016/j.comnet.2009.01.010

Cited by 34 publications

(16 citation statements)

References 10 publications

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“…It can be seen ∆P max is reduced and more ISLs become available in the optimized mode. According to (9) and Theorem 1, ∆P max is proved to be the minimum as…”

Section: B With Inter-plane Phase Differencementioning

confidence: 99%

“…When the elevation angle σ decreases to zero, GRD-VN topology cannot be maintained by satellite switches in the same orbit. While in CSD-VN, the antenna is not required to point to the fixed ( Note: GRD-VN 1 allows only intra-plane switches [6], GRD-VN 2 also enables inter-plane switches [9].…”

Section: A Topology Dynamicsmentioning

confidence: 99%

“…The seam blocking effect [5] and inter-plane phase difference may also introduce connectivity changes to the virtual network [3]. Moreover, the application of conventional VN method requires antenna supporting Earth-fixed mode [9], adding complexity for the satellite platform and causing severe call dropping problems when switches occur. This To overcome the defects of conventional VN method, we develop an improved VN method based on celestial sphere division.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Topology Virtualization and Dynamics Shielding Method for LEO Satellite Networks

et al. 2020

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Virtual Node (VN) method is widely adopted to handle satellite network topological dynamics. However, conventional VN method is insufficient when earth rotation and interplane phase difference are considered. An improved VN method based on Celestial Sphere Division is proposed to overcome the defects of the conventional method. An optimized inter-satellite link connecting mode is derived to achieve maximal available links. The optimal VN division solution and addressing scheme are designed to generate a nearly static virtual network and solve the asynchronous switches caused by inter-plane phase difference. Comparison results demonstrate the advantages of proposed method.

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“…It can be seen ∆P max is reduced and more ISLs become available in the optimized mode. According to (9) and Theorem 1, ∆P max is proved to be the minimum as…”

Section: B With Inter-plane Phase Differencementioning

confidence: 99%

Section: A Topology Dynamicsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Topology Virtualization and Dynamics Shielding Method for LEO Satellite Networks

et al. 2020

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“…Availability can be increased by binding a virtual attachment point with multiple satellites [6]. Therefore, in our evaluation, the availability of a virtual attachment point is simply defined as average number of satellites per footprint area, which is equal to, in numeral, the average number of satellites per unit angular length.…”

Section: Availability Analyses Of Satellite-fixed Footprints Based Scmentioning

confidence: 99%

Availability Analyses of Virtual Satellite Network Attachment Point Constructed by Satellite-fixed Footprints Technique

Zhang¹,

Zhao²,

Yu³

et al. 2017

Proceedings of the International Conference on Computer Networks and Communication Technology (CNCT 2016)

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Abstract. Virtual satellite network attachment point approach is explored to hide the mobility of satellites from the mobile endpoints in the highly dynamic NGEO satellite network. In this work, a mathematical model for the satellite-fixed footprint technique and a new evaluation criterion are introduced to analyze the availability of a virtual attachment point. Analyzing the quantitative evaluation results, we conclude with the benefits and some drawbacks of constructing a satellite-fixed footprint based virtual attachment point.

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“…If we consider an instant and think the network as static, the routing can be done easier. According to our assumption, we associate the routing information with the virtual network model [17]. In the virtual network model, the Earth is uniformly divided…”

Section: Discrete-time Intervals Determinationmentioning

confidence: 99%

A Discrete-Time Traffic and Topology Adaptive Routing Algorithm for LEO Satellite Networks

Jiang¹,

Zong²

2011

IJCNS

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“Minimizing path delay” is one of the challenges in low Earth orbit (LEO) satellite network routing algo-rithms. Many authors focus on propagation delays with the distance vector but ignore the status information and processing delays of inter-satellite links. For this purpose, a new discrete-time traffic and topology adap-tive routing (DT-TTAR) algorithm is proposed in this paper. This routing algorithm incorporates both inher-ent dynamics of network topology and variations of traffic load in inter-satellite links. The next hop decision is made by the adaptive link cost metric, depending on arrival rates, time slots and locations of source-destination pairs. Through comprehensive analysis, we derive computation formulas of the main per-formance indexes. Meanwhile, the performances are evaluated through a set of simulations, and compared with other static and adaptive routing mechanisms as a reference. The results show that the proposed DT-TTAR algorithm has better performance of end-to-end delay than other algorithms, especially in high traffic areas

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Virtual topology dynamics and handover mechanisms in Earth-fixed LEO satellite systems

Cited by 34 publications

References 10 publications

Topology Virtualization and Dynamics Shielding Method for LEO Satellite Networks

Topology Virtualization and Dynamics Shielding Method for LEO Satellite Networks

Availability Analyses of Virtual Satellite Network Attachment Point Constructed by Satellite-fixed Footprints Technique

A Discrete-Time Traffic and Topology Adaptive Routing Algorithm for LEO Satellite Networks

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