DMIF based QoS Management for MPEG-4 Multimedia Streaming: ATM and RSVP/IP Case Studies
Victor Marques, Ricardo Cadime, Amaro de Sousa, A. Manuel de Oliveira Duarte · 2001
This paper addresses the issue of QoS management under the framework of Delivery Multimedia Integration Framework (DMIF) protocol stack for the support of MPEG-4 multimedia streaming. In this paper, we describe how QoS was dealt in the implementation of a DMIF protocol stack over two different network technologies: IP networks with RSVP signaling and Asynchronous Transfer Mode (ATM) with Q.2931 signaling. In the RSVP/IP case, we address a strategy where the Token Bucket model is used to declare the traffic source as a variable bit rate source. In this case, we explore the fact that the network can support the delivery of variable bit rate data. In the ATM case, we address a strategy based on CBR connections where data bit rate variations are accommodated in the sending host. Particular attention is given to a video-on-demand service scenario where a server delivers MPEG-4 multimedia objects, each one composed by a video stream and an audio stream. Two key aspects are investigated. The first aspect is the mapping strategy of QoS DMIF parameters into the two different network QoS parameters. We propose two mapping methods that require pre-processing of stored media streams. The second aspect is the influence of multiplexing and packing streams in the efficiency of the mapping methods. The mapping strategies were tested on multimedia objects composed by H.263 video streams and G.723 audio streams. I.