A real time-based architecture for qos multimedia provisioning

In this paper, we focus on Internet-based multimedia data delivery services (e.g., services provided by Web, FTP, and video-on-demand servers). According the ITU-T (working group SG 12), the Quality of a multimedia service is defined subjectively as perceived by the user and it has defined by a set of user-related parameters: i) delay, ii) delay variation, and iii) information loss. To provide multimedia applications with end-to-end QoS guarantees, an efficient resource reservation and management strategy has to be taken into account. In this paper we present a schema for satisfying multimedia QoS parameters over a real-time operating system, which adopts the Rate Monotonic as a scheduling algorithm (RMA). We also present the design and implementation of a real-time based architecture for Quality Of Service multimedia provisioning. The system allows to define classes of services with different quality attributes concerning the multimedia data delivery.