QoS mapping mechanism for MPEG video transport in a DiffServ network
Johann Max Hofmann Magalhães, Paulo Roberto Guardieiro · Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 2002
In this paper, we propose a new QoS mapping mechanism for video transport in a network using the DiffServ architecture. Video packets mapping is based on the QoS index, which represents the preference of each video flow in terms of loss and delay. Then, in a specified video application, the QoS mapping will be given by prioritizing certain packets according to its importance in MPEG video streams and the desired end-to-end quality. In order to verify the efficiency of this mechanism, the end-to-end system performance was evaluated by means of modeling and simulation of MPEG-4 video transmission over a DiffServ domain. The results showed that the proposed QoS mapping mechanism can take advantage of the DiffServ architecture, making possible enhanced end-to-end video quality according to the user, and applications needs.