The satellite environment may severly limit TCP performance; achieving high data rates using TCP over satellite networks can be diÆcult. In this text we describe why TCP underperforms in satellite environment and the ways to deal with those diÆcilties.

Numerous studies have shown that packet reordering is common, especially in satellite networks where there are regular handoffs occurring between neighboring satellites. Reordering of packets decreases the TCP performance of a network, mainly because it leads to overestimation of the congestion of the network. We consider satellite networks and analyze the performance of such networks when reor...

The growth in use of Internet-based applications in recent years has led to telecommunication networks transporting an increasingly large amount of Internet Protocol (IP)-based traffic. Proposed broadband satellite constellation networks, currently under development, will be required to transport IP traffic. A case can be made for implementing IP routing directly within the constellation networ...

ROUTING AND NETWORK MOBILITY MANAGEMENT IN NEXT GENERATION SATELLITE NETWORKS Satellite networks are an attractive option to provide broadband telecommunication services to globally scattered users, due to their extensive geographic coverage, high bandwidth availability, inherent broadcast capabilities, etc. Satellites rotating in geostationary orbit (GEO) are very well suited for broadcast ser...

Based on the study of HLA (High Level Architecture) and OPNET-HLA interface, the dynamic control of simulation process and the real-time update of simulation for LEO (Low-Earth-Orbit) satellite communication system were achieved on multiple computers. In the distributed interactive simulation, a satellite’s location is controlled, then the end-to-end delay time and the routing table of Iridium ...

The recent paradigm shift in the Internet’s usage, from the host-centric communication model to a model where users request information irrespectively of its location, is coupled with an increasing need for converged and seamless access over heterogeneous wired and wireless (fixed, cellular, and satellite) networks. Using a satellite network emulator within a publish/subscribe Information Centr...

Reliable data on economic livelihoods remain scarce in the developing world, hampering efforts to study these outcomes and to design policies that improve them. Here we demonstrate an accurate, inexpensive, and scalable method for estimating consumption expenditure and asset wealth from high-resolution satellite imagery. Using survey and satellite data from five African countries--Nigeria, Tanz...