Satellite Internet services using DVB/MPEG-2 and multicast Web caching

Linder, Hilmar; Clausen, H.D.; Collini-Nocker, Bernhard

doi:10.1109/35.846088

Cited by 23 publications

(12 citation statements)

References 2 publications

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“…On the other hand, the satellite backhaul can use its wide area coverage and broadcast content to all BSs or multi-cast contents to multiple groups of BSs. The application of satellite communications in feeding several network caches at the same time using broad/multi-cast is investigated in [12], [13]. The work of [12] proposes using the broad/multi-cast ability of the satellite to send the requested contents to the caches located at the user side.…”

Section: Introductionmentioning

confidence: 99%

“…The application of satellite communications in feeding several network caches at the same time using broad/multi-cast is investigated in [12], [13]. The work of [12] proposes using the broad/multi-cast ability of the satellite to send the requested contents to the caches located at the user side. Online satelliteassisted caching is studied in [13].…”

Section: Introductionmentioning

confidence: 99%

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Cache-Assisted Hybrid Satellite-Terrestrial Backhauling for 5G Cellular Networks

Kalantari

Fittipaldi

Chatzinotas

et al. 2017

GLOBECOM 2017 - 2017 IEEE Global Communications Conference

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Abstract-Fast growth of Internet content and availability of electronic devices such as smart phones and laptops has created an explosive content demand. As one of the 5G technology enablers, caching is a promising technique to off-load the network backhaul and reduce the content delivery delay. Satellite communications provides immense area coverage and high data rate, hence, it can be used for large-scale content placement in the caches. In this work, we propose using hybrid mono/multi-beam satellite-terrestrial backhaul network for off-line edge caching of cellular base stations in order to reduce the traffic of terrestrial network. The off-line caching approach is comprised of content placement and content delivery phases. The content placement phase is performed based on local and global content popularities assuming that the content popularity follows Zipf-like distribution. In addition, we propose an approach to generate local content popularities based on a reference Zipf-like distribution to keep the correlation of content popularity. Simulation results show that the hybrid satellite-terrestrial architecture considerably reduces the content placement time while sustaining the cache hit ratio quite close to the upper-bound compared to the satellite-only method.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Cache-Assisted Hybrid Satellite-Terrestrial Backhauling for 5G Cellular Networks

Kalantari

Fittipaldi

Chatzinotas

et al. 2017

GLOBECOM 2017 - 2017 IEEE Global Communications Conference

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“…In this context, the work in [51] has focused on off-line caching and has shown that this architecture can improve the cache hit ratio while reducing the overall required backhaul rate. In a more general context, the application of satellite communications in feeding several network caches at the same time using broad/multi-cast has also been investigated in [52], [53]. The work of [52] proposes using the broad/multi-cast ability of the satellite to send the requested content to the caches located at the user side.…”

Section: B Integrated Satellite-terrestrial Backhauling Architecturementioning

confidence: 99%

“…In a more general context, the application of satellite communications in feeding several network caches at the same time using broad/multi-cast has also been investigated in [52], [53]. The work of [52] proposes using the broad/multi-cast ability of the satellite to send the requested content to the caches located at the user side. Online satellite-assisted caching is studied in [53].…”

Section: B Integrated Satellite-terrestrial Backhauling Architecturementioning

confidence: 99%

Signal Processing for High-Throughput Satellites: Challenges in New Interference-Limited Scenarios

Pérez-Neira

Vázquez

Maleki

et al. 2019

IEEE Signal Process. Mag.

141

127

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The field of satellite communications is enjoying a renewed interest in the global telecom market, and very high throughput satellites (V/HTS), with their multiple spot-beams, are key for delivering the future rate demands. In this article the state-of-the-art and open research challenges of signal processing techniques for V/HTS systems are presented for the first time, with focus on novel approaches for efficient interference mitigation. The main signal processing topics for the ground, satellite, and user segment are addressed. Also, the critical components for the integration of satellite and terrestrial networks are studied, such as cognitive satellite systems and satellite-terrestrial backhaul for caching. All the reviewed techniques are essential in empowering satellite systems to support the increasing demands of the upcoming generation of communication networks.2 SatCom system when compared to its terrestrial counterparts, including satellite channels, system constraints, and processing.Today there are approximately 1300 fully operational communication satellites. Every type of orbit has an important role to play in the overall communications system. Geostationary earth orbit (GEO), at 35,000 km, present an end-to-end propagation delay of 250 ms; therefore, they are suitable for the transmission of delay-tolerant data. Medium earth orbit (MEO), at 10,000 km, introduce a typical delay of 90 ms; based on that, they can offer a compromise in latency and provide fiber-like data rates. Finally, low earth orbit (LEO) is at between 350 and 1,200 km, and introduce short delays that range from 20 to 25 ms. In all these cases, the satellite is a very particular wireless relaying node, whose specificities lead to a communication system that cannot be treated like a wireless terrestrial one. This is because the channel, communication protocols, and complexity constraints of the satellite system create unique set of features [2], notably:• Due to the long distance to be covered from the on-ground station to the satellite, the satellite communication link may introduce both a high round-trip delay and a strong path-loss of hundreds of dB. To counteract the latter, satellites are equipped with highpower amplifiers (HPA) that may operate close to saturation and create intermodulation and nonlinear impairments.• Satellite communications traverse about 20 km of atmosphere and introduce high molecular absorption, which is even higher in the presence of rain and clouds, particularly for frequencies above 10 GHz. Therefore, satellite links are designed based on thermal noise limitations and on link budget analysis that considers large protection margins for additional losses (e.g., rain attenuation).• In the non-geostationary orbits (i.e., MEO and LEO), there are high time-channel variations due to the relative movement of the satellites with respect to the ground station.• Due to the long distance and carrier frequencies, the satellite antenna feeds are generally seen as a point in the far-field, thus making the use of spat...

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“…The application of satellite communications in feeding several network caches at the same time using broad/multi-cast is investigated in [5], [6], [7]. The work of [6] proposes using the broad/multi-cast ability of the satellite to send the requested contents to the caches located at the user side. Online satellite-assisted caching is studied in [7].…”

mentioning

confidence: 99%

Modeling and implementation of 5G edge caching over satellite

Poirier²,

Chatzinotas

et al. 2020

Satell Commun Network

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The fifth generation (5G) wireless networks have to deal with the high data rate and stringent latency requirements due to the massive invasion of connected devices and data-hungry applications.Edge caching is a promising technique to overcome these challenges by prefetching the content closer to the end users at the edge node's local storage. In this paper, we analyze the performance of edge caching 5G networks with the aid of satellite communication systems. Firstly, we investigate the satellite-aided edge caching systems in two promising use cases: a) in dense urban areas, and b) in sparsely populated regions, e.g., rural areas. Secondly, we study the effectiveness of satellite systems via the proposed satellite-aided caching algorithm, which can be used in three configurations: i) mono-beam satellite, ii) multi-beam satellite, and iii) hybrid mode. Thirdly, the proposed caching algorithm is evaluated by using both empirical Zipf-distribution data and the more realistic Movielens dataset. Last but not least, the proposed caching scheme is implemented and tested by our developed demonstrators which allow real-time analysis of the cache hit ratio and cost analysis.

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Satellite Internet services using DVB/MPEG-2 and multicast Web caching

Cited by 23 publications

References 2 publications

Cache-Assisted Hybrid Satellite-Terrestrial Backhauling for 5G Cellular Networks

Cache-Assisted Hybrid Satellite-Terrestrial Backhauling for 5G Cellular Networks

Signal Processing for High-Throughput Satellites: Challenges in New Interference-Limited Scenarios

Modeling and implementation of 5G edge caching over satellite

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