On the Analysis of Random Coverage Time in Mobile LEO Satellite Communications

Seyedi, Younes; Safavi, S.M.

doi:10.1109/lcomm.2012.031912.112323

Cited by 53 publications

(32 citation statements)

References 7 publications

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“…In particular, they analyzed the global coverage performance and the relationship between the coverage percentage and the orbital altitude by mapping every orbit pass into its ascending and descending nodes on different latitude circles, and by evaluating the performance at different altitudes. For the constraint on the elevation angle, Ulybyshev et al [20] and Seyedi et al [21] proposed statistical methods for the computation of satellite coverage times and service areas, based on the analysis of satellites coverage capacity to each latitude. Such procedures eliminate the errors of traditional techniques, due to points with discrete values in the latitude direction.…”

Section: Literature Reviewmentioning

confidence: 99%

Analysis of Satellite Constellations for the Continuous Coverage of Ground Regions

Dai¹,

Chen²,

Wang³

et al. 2017

Journal of Spacecraft and Rockets

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This paper studies the problem of analyzing multisatellite constellations with respect to their coverage capacity of areas on Earth's surface. The geometric configuration of constellation projection points on Earth's surface is investigated. A geometric subdivision approach is described, and the coverage target area belonging to each satellite and its maximum circle radius are defined and calculated. Accordingly, the target area can be decomposed into subregions, and thus the multisatellite coverage problem is decomposed into a one-satellite coverage problem. An accurate and effective solution method is proposed that solves both continuous and discontinuous coverage problems for any type of ground area. In addition, a procedure for calculating satellite orbital parameters is also proposed. The performance of our approach is analyzed using the Globalstar system as an example, and it is shown that it compares favorably with the classical grid-point technique and the longitude method.

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Section: Literature Reviewmentioning

confidence: 99%

Analysis of Satellite Constellations for the Continuous Coverage of Ground Regions

Dai¹,

Chen²,

Wang³

et al. 2017

Journal of Spacecraft and Rockets

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“…The and 0 are constant values for the specified constellation and are given in [13] while , shown in Fig. 1 denotes the trace angle corresponding to the ℎ visible satellite.…”

Section: The Scenario Settingmentioning

confidence: 99%

A simple real-time handover management in the mobile satellite communication networks

Seyedi

et al. 2015

2015 17th Asia-Pacific Network Operations and Management Symposium (APNOMS)

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Low earth orbit (LEO) satellite networks are capable of providing global or regional mobile services for a large number of users. Since the user's service duration may be greater than the coverage time of a LEO satellite, the user may be handed over to another visible satellite to prevent interruption of the ongoing communication. On the other hand, a mobile user may be covered by more than one satellite at the instant of connection handover. When the user is about to be handed over to another satellite, the serving satellite minimizing the number of handovers would in general be the one that provides the largest service time which is not necessarily equal to the coverage time of the very satellite. In this paper, we propose a new handover algorithm which exploits both the Global Positioning System (GPS) infrastructure and satellite diversity to provide a simple and real-time handover management in LEO satellite networks. The proposed algorithm not only minimizes the expected number of satellite handover, but is also efficient and easy to be implemented in hand-held devices, thus facilitating the mobile users' access to the satellite networks. Numerical simulations performed for two typical mobile satellite networks, viz. Iridium and Globalstar, corroborate the advantages gained by the proposed algorithm.

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“…Nowadays Several LEO constellations (Globalstar, Iridium, Ellipso) are active and operational [7], [8]. For complete coverage of the Earth's surface some overlapping between the adjacent satellites is necessary, to keep the continuity of real time services [9]. The global coverage can be considered as an interoperable complementary networking process of multiple satellites organized in constellation, each of them contributing with its individual coverage.…”

Section: Leo Satellites and Coveragementioning

confidence: 99%

“…The analyses are particularly useful for probabilistic investigation of intersatellite handovers in LEO satellite networks [8]. The probability of service interruption and hand over mechanism becomes important for the overall system performance [9].…”

Section: Leo Satellites and Coveragementioning

confidence: 99%