Evaluation of building blocks for passive one-way-delay measurements

Abstract

Service Level Agreements (SLAs) specify the Quality of Services (QoS) negotiated between provider and customer. QoS Measurements provide a suitable way to proof the fulfillment of the given guarantees. During service usage the traffic of interest is already present in the network. This traffic can be utilized for passive (non-intrusive) measurement methods avoiding the disadvantages of sending test traffic for active (intrusive) measurements. Some applications (e.g. interactive applications like IP telephony) rely on guarantees for one-way metrics like one-way delay. One-way metrics usually cannot be derived from round trip measurements. Therefore specific methods are required to measure one-way metrics.