Design and Implementation of One-Way IP Performance Measurement Tool

Abstract

Abstract. In this paper, we propose an architecture of measurement system which can measure IETF's IP Performance Metrics (IPPM) such as one-way delay, one-way packet loss and packet delay variation in the Internet. As the synchronization among measurement systems is very important in one-way delay measurement, we used the Global Positioning System (GPS) to synchronize the measurement systems and provided the precision up to one micro-second. To improve the accuracy of one-way delay measurement, the proposed system employs timestamps at the Ethernet frame level. We carried out measurements on the real Internet with the implemented system. It is seen that delay differs largely between path directions. Through these measurements, we present the need of one-way delay measurement.

A New Mechanism for Available Bandwidth Estimation

“…The increasing trend in the wireless Internet services means that the requested performance for a certain service might not be guaranteed, not only because of the air interface bandwidth limitation, but also due to a limitation in the transport network"s available bandwidth. Measuring IP performance metrics is a very challenging task due to the heterogeneity of the current systems and the different traffic characteristics of different data flows [4] [5]. In the recent decade, the IP Performance Metrics (IPPM) working group in Internet Engineering Task Force (IETF) defined a set of standard metrics and has developed schemes for accurately measuring these performance metrics.…”