QoS provisioning by power control for video communication via satellite links

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Video transmissions over satellite links are sensitive to signal fades because of rain, especially in the tropics. We performed a video-streaming experiment over a satellite link for 24 days distributed over 1 year to investigate the effects of rain fade. Based on the measurements, models for the relationships between rainfall rate, power level, packet loss, and video quality are proposed. Furthermore, for both uplink and downlink channel, an adaptive closed loop power control algorithm, with a Proportional–Integral–Derivative controller is designed. This is used for the mitigation of the rain-induced attenuation in order to guarantee a certain level of Quality of Service and Quality of Experience.

Ma T., Lee Y. H., Winkler S. and Ma M. “QoS provisioning by power control for video communication via satellite links” Wiley, 1 September 2014. Web. 2 September 2014.


Welcome to our Satellite Blog

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In the context of spaceflight, a satellite is an artificial object which has been intentionally placed into orbit. Such objects are sometimes called artificial satellites to distinguish them from natural satellites such as the Moon. The world’s first artificial satellite, the Sputnik 1, was launched by the Soviet Union in 1957. Since then, thousands of satellites have been launched into orbit around the Earth. Read More

Rain granularity effects on bandwidth demand for faded DVB-RCS systems

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Broadband satellite communication networks, operating at Ka band and above, play a vital role in today’s worldwide telecommunication infrastructure. The problem, however, is that rain can be the most dominant impairment factor for radio propagation above 10 GHz. This paper studies bandwidth and time slot allocation problem for rain faded DVB-RCS satellite networks. We investigate how using finer rain granularity can improve bandwidth utilization in DVB-RCS return links.

Al-Mosawi, M., Khusainov, R. and Gremont, B. “Rain granularity effects on bandwidth demand for faded DVB-RCS systems” Wiley, 25 August 2014. Web. 26 August 2014.


Intelsat Napa Teleport in Epicenter of 6.0 Earthquake [Industry update]

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The earthquake lies within a 70-km-wide (44 miles) set of major faults of the San Andreas Fault system that forms the boundary between the Pacific and North American tectonic plates. The persistent northwestward movement of the Pacific plate relative to North America primarily causes right-lateral slip across the major faults, but also causes deformation between the major faults. Read More

Dynamic satellite system QoS architecture integrated with IP Multimedia Subsystem core network

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Convergence is one of the most important challenges for Next Generation Networks (NGN). This includes service convergence as well as fixed-mobile convergence. The integration of satellite telecommunication system into NGN is a key to increasing the coverage of future networks and opening satellite access networks to a wider range of terrestrial solutions. Digital Video Broadcast (DVB) Return Channel via Satellite system (DVB-RCS) and its evolution (DVB-RCS2) are widely used European standards that are specified for broadband satellite systems using dynamic capacity assignment and multifrequency TDMA.

Baudoin C., Gineste M., Emmanuel C., Gelard P., and Bernard J. “Dynamic satellite system QoS architecture integrated with IP Multimedia Subsystem core network” Wiley, 30 July 2014. Web. 30 July 2014.


Emergency Satellite for School District

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Dallas, Texas (PRWEB) August 07, 2013 – Today Katonah-Lewisboro School District announced the acquisition of the Squire Tech Solutions LLC Business Continuity 600 satellite communications package providing alternative emergency communications for the K-12 critical administrative location. The selection of Squire Tech came after months of research and analysis of alternative communications options should local telephone, internet, data, and cellular infrastructure become unavailable.

Emergency Satellite for School District

The Business Continuity 600 solution that was selected for the Katonah-Lewisboro school district is a integrated package that provides internet, phones, data, Wi-Fi and wired IP communications via a small roof mounted satellite system. The package can be installed in under a day and provides 50 to 100 times the speeds of residential grade satellite internet.
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Texas Universities Weather Hurricane Ike

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First the good news: Universities and research institutions in Texas suffered far less damage than some had feared from Hurricane Ike. Now, the bad news: It could take weeks for the University of Texas Medical Branch (UTMB) on the flooded island of Galveston and satellite Texas A&M campuses in the Galveston area to be fully up and running.

With winds of 160 kilometers per hour and torrential rains, Hurricane Ike hit the Texas coast early on Saturday morning, submerging most of Galveston and blowing out glass windows of skyscrapers in Houston. Read More