Improving Active Measurement Estimates Using One-Way Delays

Understanding network characteristics is essential to build accurate models necessary to improve the quality of multimedia real time applications. Some performance network parameters such as the round trip time (RTT) can be easily obtained in most cases. However, variables such as one-way delay (OWD) distributions and link capacities may be difficult to estimate without the use of special hardware, such as GPS equipment. Recently, several active measuring techniques have been proposed to cope with the problems that arise when one tries to measure such quantities based solely on probes sent between two end points and without the use of special hardware. In this work, we further extend previous techniques for measuring the one-way delay and bottleneck capacity, and present a few results to illustrate the proposed techniques.