Modeling handover in mobile satellite diversity based systems

Gkizeli, M.; Tafazolli, Rahim; Evans, B.G.

doi:10.1109/vtc.2001.956570

Cited by 20 publications

(13 citation statements)

References 8 publications

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“…Gkizeli et al [34] [35] [36] proposed two handover schemes for systems with satellite diversity: (a) hard handover scheme, and (b) hybrid Channel Adaptive Selective (CASD) scheme. Hard handover scheme uses two thresholds during handover while hybrid CASD scheme uses dual satellite diversity coupled with two thresholds under critical channel conditions [36].…”

Section: Satellite Handovermentioning

confidence: 99%

“…Hard handover scheme uses two thresholds during handover while hybrid CASD scheme uses dual satellite diversity coupled with two thresholds under critical channel conditions [36].…”

Section: Satellite Handovermentioning

confidence: 99%

“…This scheme reduces handover signalling overhead and has better performance in terms of call dropping rate [36]. It has a reduced handover rate compared to "pure" satellite handover which switches satellites whenever the current signal drops below the fade margin.…”

Section: A Hard Handover Schemementioning

confidence: 99%

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

Chowdhury¹,

Atiquzzaman²,

Ivancic³

2006

IEEE Commun. Surv. Tutorials

132

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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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Section: Satellite Handovermentioning

confidence: 99%

“…Hard handover scheme uses two thresholds during handover while hybrid CASD scheme uses dual satellite diversity coupled with two thresholds under critical channel conditions [36].…”

Section: Satellite Handovermentioning

confidence: 99%

See 1 more Smart Citation

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

Chowdhury¹,

Atiquzzaman²,

Ivancic³

2006

IEEE Commun. Surv. Tutorials

132

View full text Add to dashboard Cite

show abstract

“…Therefore, handover strategy can be considered as the most important issue that greatly affects the system performance. There are several handover strategies for intra-and inter-satellites handovers in the literatures [5][6][7][8][9][10][11][12][13][14][15]. Handovers between different spotbeams are discussed in [13][14][15].…”

Section: Introductionmentioning

confidence: 99%

“…Handovers between different spotbeams are discussed in [13][14][15]. The mainly object in [5,9,10,11,12] is the analysis of the impact of handover strategies on the system performances, such as time propagation delay, handover frequency, call dropping probability (CDP) and elevation angle. Using some predictive characteristics in mobile satellites systems, a strategy based on user terminal position and signal strength measurement is proposed in [6], and a reliable handover rerouting protocol is proposed in [7], and the system performance metrics including the number of handover and the routing delay are discussed in [8].…”

Section: Introductionmentioning

confidence: 99%

A handover strategy in the LEO satellite constellation networks with ISLs

Liu

Gou

2004

SPIE Proceedings

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This paper proposes a new handover strategy named Minimal-Hops Handover (MHH) strategy for the LEO satellite-based constellation networks equipped with Inter-Satellites Links (ISL). MHH strategy, which is based on the hops of the end-to-end connection paths and makes good use of the regularity of the constellation network topology, can appropriately combine the handover procedure with routing and efficiently solve the inter-satellites handover issue.Moreover, MHH strategy can provide QoS guarantees to some extent. The system performances of the MHH strategy, such as time propagation delay and handover frequency, are evaluated and also are compared with that of other previous strategies. The simulation results show that MHH strategy performs better than them.

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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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Modeling handover in mobile satellite diversity based systems

Cited by 20 publications

References 8 publications

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

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

A handover strategy in the LEO satellite constellation networks with ISLs

Velocity‐aware handover prediction in LEO satellite communication networks

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