Due to the high bandwidth requirement and rate variability of compressed video, delivering video across wide area networks (WANs) is a challenging issue. Proxy servers have been used to reduce network congestion and improve client access time on the Internet by caching passing data. In this paper, we investigate ways to store or stage partial video in proxy servers to reduce the network bandwid...

We study systems of parallel queues with finite buffers, a single server with random connectivity to each queue, and arriving job flows with random or class-dependent accessibility to the queues+ Only currently connected queues may receive ~preemptive! service at any given time, whereas an arriving job can only join one of its accessible queues+ Using the coupling method, we study three key mod...

We consider herein a single-server queueing system with finite buffer and batch Markovian arrival process. Customers staying in the may have lower or higher priority. Immediately after each of customer is assigned lowest priority timer set for it, which defined as random variable distributed according to phase law having two absorbing states. After enters one states, leave forever (get lost) ch...

In this paper, loss probabilities and steady state probabilities of data packets for an asynchronous transfer mode (ATM) network are investigated under the buffer division and push-out schemes. Data packets are classified in classes k which arrive in Poisson fashion to the service facility and are served with general service rate under buffer division scheme, finite buffer space N is divided in...

In this paper, we propose an asynchronous cluster video server architecture, which is quite different from synchronous video server architecture in various aspects such as striping policy, placement policy, and server scheduling algorithm. This architecture has the benefits that the system scales unlimitedly with the number of disks and videos. We discuss the main design issues and compute the ...