2002 International Telecommunications Symposium

"We consider and compare four Internet distance metrics and analyze the predictive power of these metrics in selecting, from a given source, the lowest latency destination from among a candidate set. The four metrics are: IP path length; autonomous system (AS) path length; great circle geographic distance; and previously measured round trip time (RTT)....

"This paper presents a new HTTP traffic model based on the aggregation concept. The model development, evaluation and application are shown. In addition to the basic HTTP traffic characteristics, the traffic model has an easy and accurate load control. Some examples are provided to present the traffic model usage."

"This work presents a new algorithm based on the Minimum Output Variance Least Mean Square Estimator when the influence of the secondary path can not be neglected and its output is constrained by a saturation nonlinearity. This situation is typical in several adaptive modeling and control systems where the associated hardware and transducers have a...

"Multihop regular networks are analyzed for applications under non-uniform traffic distribution, taking the conventional SPF (short path first) algorithm as the routing protocol. Simulations of Manhattan Street and Shuffle Net topologies without buffer memories, under constant bit rate and variable bit rate traffic flow distributions, are analyzed using...

"This paper describes an experimental methodology for previewing path characteristics of interconnecting networks between two given sites on the Internet. The methodology is based on the analysis of Traceroute path samples collected in a regular time basis through a period of time. Paths are classified on either typical paths or minimum typical paths in...

"We demonstrate a broadband low loss dispersion compensating fiber, using Raman amplification. The device is optimized for the L and L+ bands. Only two pump sources have been used. Pump power and pump wavelength are varied in order to reduce and flatten the dispersion compensating loss. This device should prove useful for upgrading bit rate of WDM systems."

"We carry out numerical simulations to compare the impact of the fiber nonlinear effects on transmission of 40 and 80 WDM channels modulated at 10 Gb/s, for three different fiber types, standard single mode fiber, large effective area NZDSF, and reduced dispersion slope NZDSF. By comparing the results with single channel transmission, we explain the...

"This paper describes a model for rate prediction in video transcoding applications. The model is based on a log-linear approximation of rate-quantisation characteristics. It is shown that such a model is capable of accurately predicting the rate of transcoded pictures, given one R-Q point derived from the original coded signal. Its application in mobile...

"In this paper we examined the performance of the M/G/infty and fBm models to represent video traffic with different time-dependence or scaling degrees. The queueing behavior was also investigated when fed by these models. Several encoded video sequences were used for the experiments to validate the models performance results."

"The capacity of the GSM/EDGE Radio Access Network (GERAN) is expected to be limited by interference, particularly in urban areas, and by the quality of service (QoS) requirements demanded by the users. Smart antenna arrays employing beam-forming techniques, commonly known as adaptive antennas (AA), are an efficient technology in mitigating interference...