Satellite communications are destined to play an important role in future telecommunications infrastructure, thus the increasing interest in transporting Internet traac over satellite links. Many studies have shown that TCP has a poor performance in the context of satellite communications. This is due to many factors inherent to satellite communications and for which TCP originally designed for...

Satellite communication networks can provide multimedia broadband services to fixed and mobile users in several scenarios where terrestrial networks are not present or where they need to be complemented. Moreover, satellite links can be useful to bypass crowded terrestrial networks, thus helping in reducing congestion. In such a scenario, characterized by a high propagation delay and a radio ch...

Low earth orbit (LEO) satellite systems gained considerable interest towards the end of the previous decade by virtue of some of the appealing features that are endowed with, such as low propagation delay and the ability to communicate with handheld terminals. However, after the limited commercial success of the first networks of this kind, future satellite networks are now conceived as complem...

Several Ka-band satellite systems have been proposed that will use ATM technology to seamlessly transport Internet traffic. The ATM UBR, GFR and ABR service categories have been designed for data. However, several studies have reported poor TCP performance over satellite-ATM networks. We describe techniques to improve TCP performance over satellite-ATM networks. We first discuss the various des...

Title of Dissertation: Error Control for Multicasting in Satellite and Hybrid Communication Networks Daniel E. Friedman, Doctor of Philosophy, 2000 Dissertation directed by: Professor Anthony Ephremides Department of Electrical Engineering A problem inherent in ARQ multicasting over a broadcast channel is that a retransmission typically benefits only a minority of destinations while all others ...

Future Low Earth Orbiting spacecrafts will contain several IP-enabled devices that are accessible by users through ground stations. As the spacecraft moves around the Earth, mobility solution, such as Mobile IPv6 can be used to handle the mobility of the devices when satellites handover between ground stations. However, if the devices are connected to an on-board Local Area Network, the mobilit...

A multiple access protocol that is particularly suitable for cellular Internet access and satellite-based networks with on-board processing is developed in this paper. The basic idea is that when a user wishes to send a message, it transmits with a probability paccess that depends on the load on the channel. Under conditions of low load, the probability paccess approaches 1, while at high load ...

There are a growing number of small satellites that are being launched and operated to accomplish novel science and technology missions. Scientists and mission operators are seeking to download large quantities of data from these small satellites, however they are resource-constrained and communicate to capacity-constrained ground networks. Motivated by the need for intelligent operational sche...

The Transmission Control Protocol (TCP) is the mostly used protocol for data transmission over terrestrialwire line networks. However, TCP‟s congestion control algorithm wasn‟t created to match the special characteristics (long delay and high Bit Error Rate) of satellite links, resulting in a drastically performance degradation. For high speed satellite communication networks to match its chara...

| We propose a new framework for the link assignment (i.e., topological design) problem that arises from the use of inter-satellite links (ISL's) in Low-Earth Orbit (LEO) satellite networks. In the proposed framework, we model a LEO satellite network as a Finite State Automaton (FSA) where each state corresponds to an equal-length interval in the system period of the LEO satellite network. This...