  With the increasing usage of mobile devices to ubiquitously access
heterogeneous applications in wireless Internet, the measurement and analysis
of Internet traffic has become a key research area. In this paper, we present
the results of our measurements for VBR traffic over UDP in 802.11g and GPRS
networks. We focus on Inter-Packet Arrival Time (IPRT) and Inter-Packet
Transmission Delay (IPTD) and observe that the later has a significant impact
on the round trip delay. Numerical parameters for Weibull, Exponential and
Normal distribution in order to represent such traffic are also presented.
