Chapter 3. General QoS Mapping Framework

Introduction

Ongoing research efforts regarding service differentiation can be classified into two approaches: absolute differentiated service and relative differentiated service, as mentioned in Section 2.5.

Absolute differentiated service assures an admitted user of the promised performance level of the DiffServ classes, independent of the traffic status of the network. Therefore, such an approach is useful for applications that require strict QoS guarantees. On the other hand, realization of absolute differentiated service requires stringent admission control.

On the application side, much intelligence can be added to application-layer protocols nowadays. In the case of a multimedia application, the transmission ...

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