W e propose a n optimistic Quality-of-Service (QoS) provisioning scheme f o r multimedia traffic in wireless networks. The scheme uses the standard classification of network traffic into two priority classes based o n their bandwidth requirement and delay tolerance. W e classify the users as local or departing based o n their current coordinates in the cell. A call admission algorithm, a call m...

Recent advances in Grid technology have made it possible to build so-called computational Grids, or simply Grids, which couple unique or rare resources that are geographically separated and span multiple administrative domains. Such Grids are invariably composed of heterogeneous networks in which, at the least, a high-performance switch accommodates intracluster messages and a separate, sometim...

With the rapid expansion of the Internet, it has become possible for end hosts that are separated long apart to be connected through high bandwidth links. This environment, called a Large Bandwidth Delay Network, poses a major challenge to the performance of the Internet. A long-delay connection usually suffers from being treated unfairly when competing with short-delay connections. A link, to ...

We present a simulation approach for assessment of quality of service and bandwidth utilization for a meshed broadband VSAT system over a geostationary (GEO) satellite. The model includes a bent-pipe satellite with a number of broadband VSATs carrying multimedia traffic. A multi-frequency time division multiple access (MF-TDMA) is used with an integrated call admission control (CAC) and bandwid...

This paper presents an adaptive algorithm for managing the weights of a weighted round robin (WRR) scheduler. The weights calculation depends on the capacity variations present in a Digital Video Broadcasting-Second Generation (DVB-S2) satellite link. The algorithm optimizes the bandwidth utilization while satisfying the QoS requirements for different traffic classes. The operation of the propo...

High bandwidth requirements in multimedia transmission make the efficient use of limited network resource a challenging task, especially when multiple clients make their requests to the server simultaneously. In this paper, we propose a self-adjusted network transmission mechanism for multiple clients. Instead of assigning a fixed bandwidth for each client, the server determines the transmissio...

Due to the inherent bandwidth burstness, variable-bit-rate (VBR) encoded videos are very difficult to be effectively transmitted over clustered video servers for achieving high server bandwidth utilization and efficiency while guaranteeing QoS. Previous bandwidth smoothing schemes tend to cause long initial delay, data loss and playback jitters. In this paper, we propose a content-based bandwid...

In communication networks (CNs), the uncertainty is caused by the dynamic nature of the traffic demands. Therefore there is a need to incorporate the uncertainty into the network bandwidth capacity design. For this purpose, this paper developed a fuzzy methodology for network bandwidth design under demand uncertainty. This methodology is usually used for offline traffic engineering optimization...