Previous approaches to supporting video on packet-switched networks include deterministic service, statistical service, predicted service , and feedback-based schemes. These schemes represent diierent trade-oos in quality of service (QOS), achievable network utilization, and method of dealing with overload. In this paper, we propose a new service called REnegotiated Deterministic Variable Bit R...

The focus of our paper is on superposed and perprocess performance evaluation of network node in terms of losses, delays and jitter. We consider the case of discrete-time queuing system, which is fed by finite superposition of discretetime batch Markovian arrival processes (D-BMAPs), and denoted in Kendall’s notation by P D-BMAP/D/1/K. Given such system we obtain probability distribution functi...

Live media services in mobile environments are fetching more essential with the explosion of technologies. Live Media streaming, in particular, is a promising technology for providing services such as live news clips, live sports. To avoid service interruption when the users keep moving, proper data management strategies must be engaged. In an earlier paper, the ideas and benefits of two-level ...

A framework for studying QOS mapping between various levels in the information transport protocol stack and a platform for evaluating the mapping rules by performing concurrent network and application level measurements of QOS are presented. An empirical loss mapping rule between the application (frame) level and network (cell) level is given. The rule was tested using two 10 minutes motion JPE...

The current expectation of teachers in Australia is that they are able to collect, interpret, and use data related to teaching and learning. Digital technologies in schools, such as electronic methods of record-keeping, offer enhanced opportunities for teachers to perform this skill, and its application has been growing steadily in education. The aim of this exploratory study was to examine fou...

We propose a new bandwidth allocation scheme for VBR video traac in ATM networks. The scheme is tailored to MPEG-coded video sources that require stringent and deterministic quality-of-service guarantees. By exploiting the temporal structure of MPEG sources, we show that our scheme results in an eeective bandwidth which, in most cases, is less than the source peak rate. The reduction in the ban...

This paper proposes a novel phase assignment algorithm “Silent Wave Algorithm (SWA)” for periodic VBR trafJic in ATM networks. Our algorithm decides when a new periodic VBR connection should begin to transmit based on its noti$cation parameters and trafJic measurement of going connections. Simulation results showed that it is dificult to accommodate pseudo periodic VBR trafJic effectively witho...

We consider the admission control problem in video servers that retrieve video data from disk storage. Admission control decides whether or not a new client can be accepted without affecting the quality of service promised to the already admitted clients. Assuming variable bit rate (VBR) video streams, we consider an admission control policy that provides statistical service guarantees and eval...

Previous approaches to supporting video on packet-switched networks include deterministic service, statistical service, predicted service , and feedback-based schemes. These schemes represent diierent trade-oos in quality of service (QOS), achievable network utilization, and method of dealing with overload. In this paper, we propose a new service that attempts to strike an eecient balance with ...

Guarantees of quality-of-service (QoS) in the real-time transmission of video on the Internet is a challenging task for the success of many video applications. The Internet Engineering Task Force (IETF) has proposed the Guaranteed Service (GS) in the Integrated Service model with firm delay and bandwidth guarantees. For the GS, it is necessary to provide traffic sources with the capability of c...