In order to assess the performance of TCP/IP based applications and protocols for communication over heterogeneous networks, simulation and emulation activities are of great importance. In particular, real time emulation provides the opportunity to reproduce realistic environment thanks to the implementation in laboratory of real architectures and protocols, avoiding utilizing real networks and...

The paper presents an experimental approach to provide a guaranteed Quality of Service (QoS) over a satellite network based on the Internet Protocol (IP). The aim is to get a proper environment for data, voice and video transmission to be used for tele-working and distance learning. The experimental scenario, where the tests have been performed, is composed of three remote LANs: two of them are...

The demand for Internet bandwidth has grown rapidly in the past few years A new generation of broadband satellite constellations promise to provide high speed Internet connectivity to areas not served by optical ber cable or other high speed terrestrial connections However using satellite links to supply high bandwidth has been di cult due to problems with ine cient performance of the Internet ...

This issue presents the second of the two-part special topic series, ‘Cross-Layer Protocols for Satellite Communication Networks’. Cross-layer protocols for satellite networks is an emerging research area addressing the major issues of protocol design, analysis and optimization for efficient use of satellite resources and system deployment. The cross-layer design research is an interdisciplinar...

This paper presents an element of a 2×2-element array antenna for Inmarsat BGAN/GPS applications. The element is an axial mode printed quadrifilar helical antenna that has been integrated with a compact feed network to provide sequential phase rotation for circular polarization (CP) radiation. The novel integrated lumped-element feed network is designed to provide a balanced RF power to the fou...

Satellite cells are crucial for maintaining muscle homeostasis and for regeneration following injury. In this issue, Kuang et al. (2007) reveal that muscle satellite cells are a heterogeneous mixture of stem cells and committed myogenic progenitors. They show that asymmetric division of stem cells in the satellite cell niche is a mechanism for generating these two populations.

In the future mobile network, satellites will operate alongside cellular networks in order to provide seamless connectivity irrespective of the location of the user. Such a service scenario requires that the next generation of mobility management (MM) procedures are able to ensure terminal and user mobility on a global scale. This paper considers how the principles of Mobile-IP can be used to d...

Increase in the scientific disciplines has caused large data collections as important community resources. The volume of interesting data is already measured in terabytes and will soon total in peta-bytes. This research proposal presents the issue of processing massive amount of satellite data. A single LEO satellite sends around 2 GB of data in 24 hours of a day. To process this huge amount of...

The satellite industry is clearly committed to revisit and revamp the role of satellite communications within the 5G ecosystem. Central technologies being adopted in 5G networks such as Software Defined Networking (SDN) and Network Function Virtualization (NFV) are also anticipated to become key technological enablers for improved and more flexible hybridization of both satellite and terrestria...