Satellite-5G Integration: A Network Perspective

Giambene, Giovanni; Kota, Sastri; Pillai, Prashant

doi:10.1109/mnet.2018.1800037

Cited by 277 publications

(149 citation statements)

References 8 publications

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“…For the look-aside mitigation technique, one random available satellite out of those which have a separation angle of at least 5 to all interfering satellites is selected, if possible. 2 When the GSO protection technique is used, one random available satellite out of those which have a separation angle of 30 to all GSO satellites is selected. We note that for band-splitting, the link selection is similar to the case where no interference mitigation technique is applied.…”

Section: Simulation Setupmentioning

confidence: 99%

“…In this context, satellite communication systems are being increasingly used for e.g. backhaul infrastructure for on-board wireless connectivity in airplanes [1] and integration with cellular 5G to offer terrestrial broadband services [2]. Recently, a large number of satellite operators have applied to the US spectrum regulator FCC for permission to launch new non-geostationary-satellite orbit (NGSO) systems [3].…”

Section: Introductionmentioning

confidence: 99%

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Should We Worry About Interference in Emerging Dense NGSO Satellite Constellations?

Braun

Voicu

Simić

et al. 2019

2019 IEEE International Symposium on Dynamic Spectrum Access Networks (DySPAN)

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Many satellite operators are currently planning to deploy non-geostationary-satellite orbit (NGSO) systems for broadband communication services in the Ku-, Ka-, and V-band, where some of them have already started launching. Consequently, new challenges are expected for inter-system satellite coexistence due to the increase in the interference level and the complexity of the interactions resulting from the heterogeneity of the constellations. This is especially relevant for the Kuband, where the NGSO systems are most diverse and existing geostationary-satellite orbit (GSO) systems, which often support critical services, must be protected from interference. It is thus imperative to evaluate the impact of mutual inter-system interference, the efficiency of the basic interference mitigation techniques, and whether regulatory intervention is needed for these new systems. We conduct an extensive study of intersatellite coexistence in the Ku-band, where we consider all recently proposed NGSO and some selected GSO systems. Our throughput degradation results suggest that existing spectrum regulation may be insufficient to ensure GSO protection from NGSO interference, especially due to the high transmit power of the low Earth orbit (LEO) Kepler satellites. This also results in strong interference towards other NGSO systems, where traditional interference mitigation techniques like look-aside may perform poorly. Specifically, look-aside can be beneficial for large constellations, but detrimental for small constellations. Furthermore, we confirm that band-splitting among satellite operators significantly degrades throughput, also for the Ku-band. Our results overall show that the complexity of the inter-satellite interactions for new NGSO systems is too high to be managed via simple interference mitigation techniques. This means that more sophisticated engineering solutions, and potentially even more strict regulatory requirements, will be needed to ensure coexistence in emerging, dense NGSO deployments.

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Section: Simulation Setupmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Should We Worry About Interference in Emerging Dense NGSO Satellite Constellations?

Braun

Voicu

Simić

et al. 2019

2019 IEEE International Symposium on Dynamic Spectrum Access Networks (DySPAN)

View full text Add to dashboard Cite

show abstract

“…Several works exist in the literature that study satellite integration with cellular networks [7], [8], [9], [10], [11], [12], [13], [14]. Different satellite-5G integration use cases as well as the latest initiatives and challenges in future 5G terrestrial and satellite integration are summarized in [7]. In [7], the authors have also investigated the impact of impairments in a typical satellite channel in LTE waveform design as well as in L1 and L2 procedures.…”

Section: Motivation and Related Workmentioning

confidence: 99%

On the Impact of Satellite Communications Over Mobile Networks: An Experimental Analysis

Zeydan¹,

Türk²

2019

IEEE Trans. Veh. Technol.

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Future telecommunication systems are expected to co-exist with different backhauling nodes such as terrestrial or satellite systems. Satellite connectivity can add flexibility to backhauling networks and provide an alternative route for transmission. This paper presents experimental comparisons of satellite and terrestrial based backhaul networks and evaluates their performances in terms of different Key Performance Indicators (KPIs) including Channel Quality Index (CQI), Modulation Coding Scheme (MCS) index, Downlink (DL) throughput, Frame Usage (FU) ratio and number of Resource Block (RB) utilization. Our experimental satellite network system uses a real satellitebased backhaul deployment and works in Ka band. As a benchmark, we compare our system with terrestrial network with regular cellular backhaul connection. Our experiments reveal three main observations: The first observation is that problems with FU ratio and number of RB utilization exist in satellite eNodeB even though a single test user equipment (UE) with high CQI and MCS index values is connected. The second observation is that in satellite link relatively low numbers of Protocol Data Units (PDUs) are generated at Radio Link Controller (RLC) layer compared to the Packet Data Convergence Control (PDCP) layer. Finally, our third observation concludes that the excessive existence of PDCP PDUs can be due to utilization of General Packet Radio Service (GPRS) Tunneling Protocol-User Plane (GTP-U) accelerator where an optimal balance between the caching size and the number of UEs using satellite eNodeB is needed. Hence, the existence of a trade-off between the supported number of UEs using satellite link and the GTP-U acceleration rate is also revealed with our experimental results.

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“…Benefiting from the ubiquitous coverage and emergency broadcast provision, satellite networks are expected to not only effectively offload traffic for terrestrial networks, but also provide satisfactory services for rural/harsh areas where deployments of terrestrial components are economically unfavorable in the upcoming 5G era [1], [2]. However, con- ventional orthogonal multiple access (OMA) scheme, such as time/frequency/code-division multiple access, largely limit the improvements in spectrum utilization efficiency and the number of served users [3].…”

Section: Introductionmentioning

confidence: 99%

Genetic Algorithm Optimized Support Vector Machine in NOMA-based Satellite Networks with Imperfect CSI

Yan

Wang

et al. 2020

ICASSP 2020 - 2020 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)

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With the help of a power-domain non-orthogonal multiple access (NOMA) scheme, satellite networks can simultaneously serve multiple users within limited time/spectrum resource block. However, the existence of channel estimation errors inevitably degrade the judgment on users' channel state information (CSI) accuracy, thus affecting the user pairing processing and suppressing the superiority of the NOMA scheme. Inspired by the advantages of machine learning (ML) algorithms, we propose an improved support vector machine (SVM) scheme to reduce the inappropriate user pairing risks and enhance the performance of NOMA based satellite networks with imperfect CSI. Particularly, a genetic algorithm (GA) is employed to optimize the regularization and kernel parameters of the SVM, which effectively improves the classification accuracy of the proposed scheme. Simulations are provided to demonstrate that the performance of the proposed method is better than that with random user paring strategy, especially in the scenario with a large number of users.Index Terms-Power-domain non-orthogonal multiple access, satellite networks, genetic algorithm, support vector machine, user paring.

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Satellite-5G Integration: A Network Perspective

Cited by 277 publications

References 8 publications

Should We Worry About Interference in Emerging Dense NGSO Satellite Constellations?

Should We Worry About Interference in Emerging Dense NGSO Satellite Constellations?

On the Impact of Satellite Communications Over Mobile Networks: An Experimental Analysis

Genetic Algorithm Optimized Support Vector Machine in NOMA-based Satellite Networks with Imperfect CSI

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