We study the performance of Selective Acknowledgments with TCP over the ATM-UBR service category. We examine various UBR drop policies, TCP mechanisms and network con gurations to recommend optimal parameters for TCP over UBR. We discuss various TCP congestion control mechanisms compare their performance for LAN and WAN networks. We describe the e ect of satellite delays on TCP performance over...

Achieving QoS for TCP traffic in Satellite Networks with Differentiated Services Arjan Durresi, Sastri Kota, Mukul Goyal, Raj Jain, Venkata Bharani Department of Computer and Information Science, The Ohio State University, 2015 Neil Ave, Columbus, OH 43210-1277, USA Tel: 614-688-5610, Fax: 614-292-2911, Email: {durresi, mukul, bharani}@cis.ohio-state.edu Lockheed Martin 60 East Tasman Avenue MS...

Middleware promises seamless integration of heterogeneous networks and computing/telecommunications environments by providing distributed services to user applications. With Low Earth Orbit satellite networks being deployed as communications infrastructure, it is important that middleware can operate efficiently over these networks. For applications to have good performance, efficient and robus...

The design and development of future satellite networks includes preferably, besides a thorough system definition phase, the simulation of the entire satellite network with special interest on the network behavior and the (prototype based) development of system components. Especially with respect to the development of MAC protocols which should preferably included at an earliest stage in the ne...

Satellite is going to play an important role in the global information infrastructure. Satellite can provide direct to home Internet service (i.e. DirecPC from Hughes Network System) and it can also serve as traffic trunk in the middle of the network. About 98 percent of the Internet traffic is TCP traffic. TCP works well in the terrestrial fiber network. However, in the satellite hybrid networ...

This paper investigates the performance of two TCP enhancements (i.e., Scalable TCP and HighSpeed TCP), recently proposed for high-speed backbone networks with a very large bandwidth-delay product, in a geostationary satellite environment. Both persistent and elastic traffic patterns are considered, performance being evaluated in terms of TCP throughput and mean session delay, respectively. The...

MAC Architecture for Broadband Satellite Access Systems Tallal O. Elshabrawy In recent years, the telecommunications industry has expanded tremendously. A tendency of integrating various business revenues with the conventional communication systems is becoming more and more popular to achieve global information services. The integration is triggered by increasing demands of costumers to access ...

Where dense on-ground water resources monitoring networks do not exist, satellite observation can play a key role. The Australian water resources assessment system (AWRA) couples hydrological models and combines these with on-ground and satellite observations. Some satellite observations are currently being used in the operational system but there is potential for much greater use. Opportunitie...