Dataset of One-Way Delay in Local and Global Networks

One-way delay (OWD) is the transmission time of the network packet from the first to the last bit from the sender node to the receiver node. The data set presented here was obtained as a result of measurements performed for the paper “Improving the Accuracy of One-Way Delay Measurements”.One-way delay measurements were performed using three different utilities:* the utility from the OWAMP protocol;* first version of our utility, owping1; and* the new version of our utility, owping2.These measurement utilities differ critically in the way that they set timestamps. The first generation of utilities (OWAMP and owping1) set the time stamp arbitrarily during the assembly of the measurement package and later during its interpretation after being received. Thus, the processing time on the measuring device is added to the delay value.The new version of the utility for setting timestamps uses the capabilities that were provided for in the Linux kernel, starting with version 2.6.30. In this and later versions of the kernel the SO_TIMESTAMPING socket option was added, which enables the interrogation of information, from the OS kernel, about the times at which packets are sent and received. Timestamps set/obtained in this way are the most accurate, since the OS kernel sets/interrogates them directly at the time of the physical sending or receiving of packets. Thus, the uncertainty associated with the time interval, associated with the assembly and subsequent interpretation of the packet, has been eliminated.