The aim of this paper is to present a suitable satellite multimedia network architecture and the results of simulated medium access control (MAC) protocols. The new generation of satellite multimedia networks is going to handle different types of traffic such as multimedia traffic. The ATM technology was developed for the integrated transmission of various types of traffic. The future networks ...

IP satellite networks are gaining a considerable interest and this is mainly due to their ability to deliver high bandwidth services to nation-wide areas. Some difficulties exist, however, to implement IP based transport mechanisms on geo-stationary satellite networks. TCP based protocols performance are heavily affected by the large delay-bandwidth product on GEO satellites and by the coexiste...

Globalization constitutes ideas, behavior and personality of people according to values and norms and affects different aspects of life of people (individually and socially). This research has been done in order to study the effect of globalization on moral values of the youth regarding sociology perspective. Statistical universe of this research includes 800 persons in Tehran. This research ha...

This paper describes a reusable architecture that has been used to develop network management systems for data-centric satellite-based networks. The satellite-transport characteristics and networks impose unique constraints on the management systems. Under the data-centric scheme, the manager keeps the network configuration management information that is automatically downloaded by the agents r...

Satellite networks have been widely investigated both in the business and academia for many years, with many important routing algorithms reported in the literatures. However, fewer existing routing algorithms focus on the trade-off between the routing survivability and the routing computation and storage overheads. Due to topological dynamics, it is difficult to effectively apply the conventio...

Broadband satellite-based IP networks have been considered as the technology to enable a strong and promising next-generation market. In satellite communication systems, the channel performance might be severely degraded due to the dynamic weather conditions such as the precipitation, and thereby lead to network congestion. Therefore, congestion control is critical in such networks to satisfy Q...

1 0-7803-7651-X/03/$17.00 © 2003 IEEE 2 IEEEAC paper #1197, Updated December 10, 2002 Abstract—Proposed satellite constellation networks, based on Geostationary Earth Orbit (GEO) satellites, Medium Earth Orbit (MEO), and Low Earth Orbit (LEO) systems, will be required to transport IP traffic and to provide quality of service (QoS). This paper proposes a new Diffserv-based scheme of IP bandwidth...

This paper proposes a design for key management for secure multicast in hybrid satellite networks. Communication satellites offer an efficient way to extend IP multicast services for groups in wide-area networks. In order to be commercially viable, the multicast traffic should be accessible only to paying subscribers. Access control can be achieved by data encryption. This requires secure and e...