The Satellite Internet

2011 ◽  
pp. 131-149
Author(s):  
Agnieszka Chodorek ◽  
Robert R. Chodorek
Keyword(s):  
Satellite Data ◽  
Satellite Communication ◽  
Internet Access ◽  
Data Networks ◽  
Broadband Internet ◽  
Ip Multicasting ◽  
Isolated Communities ◽  
The World ◽  
Corporate Network ◽  
High Bandwidth

The aim of this chapter is to show the satellite Internet as a new quality, which was created thanks to the convergence of satellite communication and data networks. The chapter describes the development of satellite communication and satellite data networks, presents methods of Internet access via satellite and discuss the opportunities and challenges of building effective commercial services based on satellite Internet. The main advantages of the satellite Internet are high bandwidth, very good availability (in practice: anywhere in the world), and natural IP multicasting. Although getting broadband Internet access by satellite is considered very expensive, independence from the local infrastructure results in the satellite Internet being a good solution for both business communications (a corporate network or its fragments) and remote area communications (rural communications and services to isolated communities).

Examining the Influence of Government Policy on Broadband Internet Access

2011 ◽  
pp. 48-56
Author(s):  
Qiuyan Fan
Keyword(s):  
Government Policy ◽  
Internet Access ◽  
Action Plans ◽  
Broadband Internet ◽  
Multiple Perspective ◽  
Performance Targets ◽  
The World ◽  
Broadband Market ◽  
And Performance ◽  
Perspective Model

Governments worldwide are driving initiatives to deploy broadband infrastructure and services. China has topped the world broadband market with the total broadband user base exceeding 320 million (CNNIC, 2009). However, a closer analysis indicates that broadband in China is less advanced in terms of penetration rate, access speed and price. Why China is lagging? Despite the fact that broadband performance and adoption are determined by both non-policy factors and policy factors, the OECD experience shows that smart national broadband policies are the key to broadband success. This chapter reviews and analyzes relevant regulations and government policies pertaining to broadband development in China using a multiple perspective model. The primary goal of this chapter is to examine how various policy factors interplay to affect broadband deployment and performance in the case of China. This research shows that the Chinese approach to broadband development has not produced desirable results. Several factors affect the growth of broadband. The most significant is lack of a detailed national broadband plan with clearly stated goals, performance targets and action plans for implementation. China’s regulatory arrangement and approaches to regulating broadband industry have failed to establish a well functioning and competitive market and to drive high levels of broadband performance, investment and innovation.

scholarly journals BROADBAND SATELLITE DATA NETWORKS IN THE CONTEXT OF AVAILABLE PROTOCOLS AND DIGITAL PLATFORMS

2021 ◽  
Vol 11 (2) ◽  
pp. 56-60
Author(s):  
Jacek Wilk-Jakubowski
Keyword(s):  
Satellite Data ◽  
End Users ◽  
Satellite Networks ◽  
Data Networks ◽  
Regional Networks ◽  
Technical Aspects ◽  
Digital Platforms ◽  
The World ◽  
Point To Point ◽  
Broadband Satellite Networks

Satellites are the transmission medium for providing connectivity and building global, continental, or regional networks around the world (satellite operators effectively use satellites to support Internet traffic), and point-to-point connections are also possible. In practical use, there are combinations of VSAT networks with terrestrial wireless extensions, allowing end users to increase the capabilities offered via satellite. This paper provides selected information on broadband satellite networks using VSAT technology, including available protocols and transmission platforms. The aim of the article is also to present the chosen technical aspects of satellite networks working with the usage of VSAT technology.

Performance of 4G-LTE Communication and Navigation System in Blended Wing-Body UAS

2019 ◽  
Vol 8 (4) ◽  
pp. 9538-9542
Keyword(s):  
Satellite Communication ◽  
Line Of Sight ◽  
Multiple Factors ◽  
The World ◽  
New Type ◽  
Blended Wing Body ◽  
4G Lte ◽  
The Right ◽  
And Control ◽  
Technology Demonstrator

In vision of searching for the right Unmanned Aerial System (UAS) for a specific mission, there are multiple factors to be considered by the operator such as mission, endurance, type of payload and range of the telemetry and control. This research is focusing on extending control range of the UAS by using 4G-LTE network to enable beyond-line-of-sight flying for the commercial UAS. Major UAS such Global Hawk, Predator MQ-1 are able to fly thousands of kilometers by the use of satellite communication. However, the satellite communication annual license subscription can be very expensive. With this situation in mind, a new type of flight controller with 4G-LTE communication has been developed and tested. Throughout the research, blended-wing-body (BWB) Baseline B2S is used as the platform for technology demonstrator. Result from this analysis has proven that the proposed system is capable to control a UAS from as far as United Kingdom, with a latency less than 881 ms in average. The new added capability can potentially give the commercial UAS community a new horizon to be able to control their UAS from anywhere around the world with the availability of 4G-LTE connection

scholarly journals The Core of the Global Corporate Network

2021 ◽  
Author(s):  
Ricardo Giglio ◽  
Thomas Lux
Keyword(s):  
Network Topology ◽  
World Wide ◽  
Data Set ◽  
The Core ◽  
Comprehensive Data ◽  
The World ◽  
Corporate Network ◽  
Board Membership ◽  
National Networks ◽  
Wide Population

AbstractWe investigate the network topology of a comprehensive data set of the world-wide population of corporate entities. In particular, we have extracted information on the boards of all companies listed in Bloomberg’s archive of company profiles in October, 2015, a total of almost 100,000 firms. We provide information on board membership overlaps at various levels, and, in particular, show that there exists a core of directors who accumulate a large number of seats and are highly connected among themselves both at the level of national networks and at the worldwide aggregated level.

Radio Frequency Support for Space Systems Based on Multi-Satellite Constellations Taking into Account the ITU-R Requirements and the WRC-19 Results

2021 ◽  
Vol 8 (4) ◽  
pp. 72-76
Author(s):  
А. А. Talanov ◽  
◽  
S. А. Fedotov ◽  
А. М. Stepanov ◽  
◽  
...  
Keyword(s):  
Radio Frequency ◽  
Frequency Spectrum ◽  
Communication Systems ◽  
Electromagnetic Compatibility ◽  
Satellite Communication ◽  
Space Systems ◽  
Satellite Constellations ◽  
Broadband Internet ◽  
State Commission ◽  
Radio Frequency Spectrum

Deployment of space systems based on multi-satellite constellations to provide broadband Internet access and communication services acutely raises the question of their radio frequency support including issues of electromagnetic compatibility (EMC) between competing space systems using multi-satellite constellations (StarLink, OneWeb, Kuiper, etc.), their EMC with traditional space systems (satellite communication systems that employ spacecraft in geostationary and non-geostationary orbits, space systems of other services), as well as regulatory issues of entering into service and staged deployment of space systems. The article formulates the problematic issues of radio frequency support of modern space systems taking into account the trends of satellite constellations deployment and proposes the solutions with consideration to international and national requirements in the regulation of radio frequency spectrum including the ITU requirements and the requirements of Russian State Commission for Radio Frequencies. The paper shows the ways to share the radio frequency spectrum to meet new requirements of the World Radiocommunication Conference 2019 (WRC-19).

scholarly journals Turning Need into Demand for Wi-Fi Broadband Internet Access on Trains

2012 ◽  
Vol 53 (4) ◽  
pp. 29-42 ◽  
Author(s):  
Sajjad Karim ◽  
Shoaib Khan ◽  
Ahmed Qureshi ◽  
Imran Daud
Keyword(s):  
Internet Access ◽  
Broadband Internet

scholarly journals Show or Tell? Teaching with language outperforms demonstration but only when context is shared

2021 ◽  
Author(s):  
Theodore Sumers ◽  
Mark K Ho ◽  
Robert Hawkins ◽  
Tom Griffiths
Keyword(s):  
Real Time ◽  
Comparative Approach ◽  
High Fidelity ◽  
Linguistic Communication ◽  
Communicative Acts ◽  
Wide Range ◽  
The World ◽  
High Bandwidth ◽  
Abstract Language ◽  
Shared Context

People use a wide range of communicative acts, from concrete demonstrations to abstract language. What are the strengths and weaknesses of such different modalities? We present a series of real-time, multi-player experiments asking participants to teach (Boolean) concepts using either demonstrations or language. Our first experiment (N = 454) manipulated the complexity of the concept, finding that linguistic (but not demonstrative) teaching enables high-fidelity transmission of more complex concepts. Why, then, do humans use both demonstrations and language? As a form of conventionalized communication, language relies on shared context between speaker and listener, whereas demonstrations are inherently grounded in the world. We hypothesized linguistic communication would be more sensitive to perturbations of shared context than demonstrations. Our second experiment (N = 568) manipulated teachers’ ability to see the features that defined the concept. This restriction severely impaired linguistic (but not demonstrative) teaching. Our comparative approach confirms language relies on shared context to permit high bandwidth communication; in contrast, demonstrations are lower-bandwidth but more robust.

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