Dynamic QoS mapping control for streaming video in relative service differentiation networks

A dynamic quality of service (QoS) mapping control scheme, which includes feedforward and feedback QoS control, is proposed for the differentiated services (DiffServ) networks in this work. To achieve reliable and consistent end-to-end video streaming with relative service differentiation, the proposed solution consists of two parts: (1) relative priority-based indexing and categorization of streaming video content at the sending end-system and (2) dynamic and aggregate QoS mapping control with packet, session, and class-based granularity level for categorized packets at the edge of the DiffServ domain, called the video gateway (VG), based upon the load variation of the network. In particular, we focus on dynamic solutions to handle QoS demand variations of continuous media applications (e.g. varying priorities from aggregated/categorized packets) and QoS supply variations of the DiffServ network (e.g. varying loss/delay due to fluctuating network loads). Thus, with the proposed dynamic QoS mapping control, video streaming with enhanced quality is demonstrated under a pricing model.