Evaluation of the guaranteed handover algorithm in satellite constellations requiring mutual visibility

Boedhihartono, Poethi; Maral, G.

doi:10.1002/sat.737

Cited by 17 publications

(16 citation statements)

References 8 publications

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“…In that study the supported traffic was categorized into two classes, one that accounted for real-time multimedia calls and another that accounted for non-real-time data services. The technique that was used for real-time services was similar to the one that was proposed in [4], whereas the strategy that was employed for non-real-time calls was similar to the one that was applied to data calls in [28].…”

Section: Review Of Cac and Handover Schemesmentioning

confidence: 99%

“…Moreover, different satellite selection criteria were described which can be used for both new and handover calls. It should also be noted that, in both [11] and [4], the scheme was tested for voice traffic.…”

Section: Review Of Cac and Handover Schemesmentioning

confidence: 99%

“…The study in [4] assessed the "guaranteed handover" scheme as a satellite handover technique for LEO constellations that require at least one satellite to be visible to both the user terminal and the gateway earth station. Moreover, different satellite selection criteria were described which can be used for both new and handover calls.…”

Section: Review Of Cac and Handover Schemesmentioning

confidence: 99%

“…Hereafter we consider LEO satellite systems with inter-satellite links (ISLs), hence at least one satellite needs to be visible to the source terminal. In systems that do not employ ISLs at least one satellite should be in view of both the user terminal and a gateway earth station [4]. In recent satellite systems, the coverage area of a satellite, which is referred to as its footprint, is divided into several cells in order to increase the capacity of the network.…”

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confidence: 99%

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QoS handover management for multimedia LEO satellite networks

Karapantazis

Pavlidou

2006

Telecommun Syst

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Low earth orbit (LEO) satellite systems gained considerable interest towards the end of the previous decade by virtue of some of the appealing features that are endowed with, such as low propagation delay and the ability to communicate with handheld terminals. However, after the limited commercial success of the first networks of this kind, future satellite networks are now conceived as complementary rather than competitive to terrestrial networks. In this paper, we focus on one of the most influential factors in system performance, that is, the handover of a call. First, we provide a succinct review of the handover strategies that have been proposed in the literature. Then we propose two different satellite handover techniques for broadband LEO satellite systems that capitalize upon the satellite diversity that a system may provide. The proposed schemes cater for multimedia traffic and are based on the queuing of handover requests. Moreover, a deallocation scheme is also proposed according to which capacity reservation requests are countermanded when the capacity that they strive to reserve is unlikely to be used. Simulation studies further document and confirm the positive characteristics of the proposed handover schemes.

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Section: Review Of Cac and Handover Schemesmentioning

confidence: 99%

Section: Review Of Cac and Handover Schemesmentioning

confidence: 99%

Section: Review Of Cac and Handover Schemesmentioning

confidence: 99%

mentioning

confidence: 99%

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QoS handover management for multimedia LEO satellite networks

Karapantazis

Pavlidou

2006

Telecommun Syst

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“…The satellite selection criteria proposed in [13] and [37] use link quality, system geometry and local blockage of channels as criteria for satellite selection. However, LEO satellite systems which strictly depends on these issues for satellite selection may often fail to choose the correct satellite due to local obstructions.…”

Section: • Visibility Time With Early Channel Release (Vt/ecr)mentioning

confidence: 99%

Handover schemes in satellite networks: state-of-the-art and future research directions

Chowdhury¹,

Atiquzzaman²,

Ivancic³

2006

IEEE Commun. Surv. Tutorials

128

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Abstract-Low Earth Orbit (LEO) satellites will work as an important component in future data communication networks. LEO satellites provide low end-to-end delays and efficient frequency spectrum utilization, making it suitable for personal communication. However, due to high satellite speed, the ongoing communication using LEO constellations experiences frequent handover. In this paper, we provide an up-to-date comprehensive literature survey on proposed handover schemes for LEO satellite systems. We also present a detailed classification of handover schemes based on a common framework. We first classify the schemes into link layer and network layer handover schemes. Link layer handover schemes are further classified into three categories: (a) spotbeam handover schemes, (b) satellite handover schemes, and (c) ISL handover schemes. Spotbeam handover schemes are categorized based on channel capacity, handover guarantee, and handover prioritization techniques. Network layer handover schemes are also classified depending on connection transfer strategies. Finally, we compare the handover schemes using different Quality of Service.

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Velocity‐aware handover prediction in LEO satellite communication networks

Song

Liu

et al. 2018

Satell Commun Network

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The previous satellite handover prediction and ground cellular network were mainly studied in the static steady satellite links. Rare work has been conducted to resolve the dynamic satellite handover prediction. The complexity of this problem comes from that the multiple link states of the satellite change with the users' movements. To reckon with these challenges, the time-expanded graph, in which the covering satellite and the handover strategy are treated as its node and arc weight respectively, is constructed in this paper. And the handover prediction is viewed as finding the shortest path of the time-expanded graph dynamically based on the previous state with the perception of velocity. Compared with the previous approaches in the satellite handover prediction, the proposed method can effectively avoid the handover prediction failure and reduce the redundant computation triggered by static update algorithms. Simulation results are presented to show the improvements. KEYWORDS dynamic update, intersatellite link (ISL) handover, LEO satellite network, satellite handover 1 | INTRODUCTIONIn contrast with geostationary and medium earth orbit, low Earth orbit (LEO) satellite communication networks take on a shorter propagation delay. The demand for a seamless real-time voice and data coverage can be met as the LEO systems are integrated with terrestrial links. Because the position of base station in the ground cellular network is fixed, the user generally performs handover through the real-time signal-to-interference-plus-noise ratio measurement. However, arising from the low altitudes and high speeds of LEO satellite communication networks, their footprints on the earth's surface shall be changed rapidly so that the real-time signal-to-interference-plus-noise ratio measurement is not fully applicable to the LEO satellite communication. Consequently, the prediction of the handover needs to be performed so as to elevate the frequency of satellite handover to sustain a real-time service connection.In contrast with the spot-beam handover and ground cellular network handover, the intersatellite link (ISL) handover has aroused less concern.With the increase in the number of LEO satellites, more satellites at any time can be approved by the user. In this regard, it is the general trend of research on ISL handover. A hard handover scheme 1 and a hybrid channel adaptive handover scheme 2,3 were proposed by Gkizeli et al. Seyedi et al analyzed the coverage time for the users in LEO satellite networks and initially derived a lower bound for the expected quantity of ISL handover. 4,5 The foregoing ISL handover criterions were concluded, and a graph-based ISL handover prediction framework 6 was proposed by Zhaofeng Wu et al to incorporate all the existing satellite handover criterions flexibly. Unfortunately, most of the works can be merely geared into the scenario where the satellite link states are stable. They hypothesize if the velocity of the user is negligible. Yet practically, the velocity of the user is not negligible ...

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Evaluation of the guaranteed handover algorithm in satellite constellations requiring mutual visibility

Cited by 17 publications

References 8 publications

QoS handover management for multimedia LEO satellite networks

QoS handover management for multimedia LEO satellite networks

Handover schemes in satellite networks: state-of-the-art and future research directions

Velocity‐aware handover prediction in LEO satellite communication networks

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