GPS clock based one way delay measurement and modeling in web environment

Delay is one of the main parameters in determining quality of service and topology of network. One way delay provides us with more information than that a round trip time does and it also involves more intricate calculations. In this paper, two measuring devices are designed and implemented that can measure the one way delay present between two distant points in web environment using GPS clock and based on active measurement. The results obtained from these measurements were then analyzed and modeled, meanwhile VPN network behavior and packet size effect on the amount of delay were also investigated as well. Delay could be measured at anywhere and anytime with low costs and accuracy of 20 microseconds and accuracy of synchronization of 30 nanoseconds with only IP, MAC and Gateway addresses in hand, utilizing the devices made based on this approach.