The Space Software Laboratory is developing a self-configuring distributed kernel to be used on future satellite missions. The completion of this system will allow a network of heterogeneous processor nodes to communicate and broadcast in a scalable, self-configuring manner. Node applications software will be transparent to the underlying network architecture, message routing, and number of net...

Current wireless world witnesses multiple heterogeneous systems such as Bluetooth, IEEE 802.11, UMTS, and satellite networks. These systems are envisioned to coordinate with each other to provide ubiquitous communications to mobile users. A novel architecture, Architecture for ubiquitous Mobile Communications (AMC), is introduced in this paper that integrates these heterogeneous wireless system...

A new network has been recently proposed for the provision of fixed broadband services via high altitude platform stations (HAPS) in the 48/47 GHz band. One of the critical issues of this technology is spectrum sharing with the fixed satellite service. This paper examines the effect of Earth-to-stratosphere co-channel interference produced by ground stations of HAPS network to geostationary orb...

As the communication becomes a global affair today, engineers had begin to look into the heterogeneous network solution for faster and cheaper deployment. For heterogeneous network to function properly, efficient and effective mobility management is vital to ensure uninterruptable and ubiquitous connection. Recently there has been many works done to replace the traditional handoff decision algo...

Mobile satellite communication channels are characterized by long transmission delays, variation of these delays, high bit-error-rates, shadowing and the multipath e!ect which severely reduce the quality of video services. Error control techniques including feedback mechanisms, error concealment methods, forward error correction techniques and error resilience schemes are examined in this paper...

The paper presents results from the first SUITED (multi-segment System for broadband Ubiquitous access to InTErnet services and Demonstrator) demonstration campaign, focusing on the GMBS (Global Mobile Broadband System) terminal. A practical user mobility solution for a heterogeneous access network and a trial realisation is described. A new vehicular satellite active antenna concept, developed...

public diplomacy is an idiom that has been noticed increasingly in last decades due to extension of internet and satellite news networks. this type of diplomacy be used related to influence, guidance and mobilization of public opinion for the aims of governmental and non-governmental agents. in this article, the author tried to give analytical answer to this question: in spite of being newest, ...

In this paper some simple cooperative relaying strategies which rely on the exploitation of the Delay Diversity technique and the Maximal Ratio Combining (MRC) receive diversity algorithm are proposed for a DVB-SH compliant hybrid satellite/terrestrial network. These strategies are investigated in a public emergency scenario where the adoption of an integrated heterogeneous network combined wit...

The topology of repeated sequences in mouse plasmocytoma DNA was studied by high-resolution CsCl density gradient centrifugation and heterogeneous nuclear RNA.DNA hybridization. Satellite region DNA of plasmocytoma cells contains additional components and hybridizes specifically with entire heterogeneous nuclear RNA molecules. A linkage is demonstrated between the A+T-rich satellite sequences a...