Geostationary satellite networks are currently considered as one of the most promising broadband access network technology for narrowing the digital divide. Though technically attractive and cost effective, the provisioning of endto-end QoS services in satellite access remains largely undefined. In order to bridge this gap, the European SATIP6 project defines a complete QoS architecture involvi...

Practical experiments in a satellite network environment assist in the design and understanding of future global networks. This paper describes the practical experiences gained from TCP/IP on ATM networks over a high speed satellite link and presents performance comparison studies of such networks with the same host/traac conngurations over local area (LAN) and wide area (WAN) networks. These c...

Following their discovery in 1961, it was speculated that satellite cells were dormant myoblasts, held in reserve until required for skeletal muscle repair. Evidence for this accumulated over the years, until the link between satellite cells and the myoblasts that appear during muscle regeneration was finally established. Subsequently, it was demonstrated that, when grafted, satellite cells cou...

Research and development activities have been implemented for the Satellite/Terrestrial Integrated Mobile Communication System (STICS) that enables mobile phones to seamlessly switch terrestrial communication links/satellite communication links. In STICS, through taking advantage of a large-antenna multi-beam satellite communication system, the satellite/terrestrial communications links are sup...

Broadcast satellite networks are going to play an important role in the global information infrastructure. Several systems including DirecWay from Hughes Network System use satellites to provide direct-to-user high speed Internet services. TCP works well in the terrestrial fiber networks but does not work well in satellite hybrid (satellite-terrestrial) networks. In this paper we analyze the pr...

Low earth orbit (LEO) satellite has the advantages of global coverage, low propagation delay and low path losses, etc. Combined with orthogonal frequency division multiplexing (OFDM) transmission, LEO satellite system can support very high capacity suitable for wideband multimedia traffic. This paper analyzes the channel model and throughput for LEO OFDM satellite communication system. First, s...

In this document we describe the architecture of BRAHMS (Broadband Access for High speed Multimedia via Satellite), project sponsored by EU in the framework of IST research programme. BRAHMS aims at specifying an IP-based architecture for broadband satellite access independently of the particular GEO or LEO satellite technology adopted in the satellite link. Broadband Multimedia Satellite Syste...

Geostationary satellite networks are currently considered as one of the most promising broadband access network technology for narrowing the digital divide. Though technically attractive and cost effective, the provisioning of endto-end QoS services in satellite access remains largely undefined. In order to bridge this gap, the European SATIP6 project defines a complete QoS architecture involvi...

The satellite communication data traffic is increasing dramatically over the coming years. High throughput multibeam satellite networks in Ka band are potentially able to accommodate the upcoming high data rate demands. However, there is only 500 MHz of exclusive band for download and the same amount for upload. This spectrum shortage impose a barrier in order to satisfy the increasing demands....