2002 International Telecommunications Symposium

"This paper discusses an integrated Finite Element Modeling package to derive an to analyze two and three-dimensional formulations of Maxwell’s equations governing classical electromagnetic propagation. In fact, the interactive developer here presented converts the point-wise partial differential operators to equivalent scalar integral operators,...

"This work presents an algorithm to perform radiowave coverage predictions in urban environments using the Uniform Theory of Diffraction (UTD). The ray-tracing algorithm is based on the image theory for a quasi-3D environment. Multiple reflections and diffractions are considered through the separation of multipath components into four different classes,...

"With the exponential development of wireless communication and miniaturization of RF transceivers, the need for small and low profile antennas has been growing. Besides that, the Third Generation wireless communication system, 3G, will be more focused and driven largely by advances in the antennas array performance. The PIFA, Planar inverted-F antenna,...

"The triangular microstrip resonator with steps in the width is a way to simulate the triangular form by the triangular discrete. The analysis is made using the full wave and concise Transverse Transmission Line (TTL) method in the Fourier Transformed Domain (FTD), in conjunction with the Moment Method. Numerical results of the resonance frequency are...

"This paper presents the development of a modeling framework to evaluate the quality of service of ATM switched virtual connections (SVCs). The proposed modeling framework not only encloses all ATM Traffic Management functions and their complex relationship, but also encloses ATM cell transport/processing, ATM traffic contract negotiation, and ATM SVCs...

"In this paper, we applied the virtual buffer measurement technique to estimate near-minimal sets of ATM traffic descriptors for transport of stored MPEG coded video over ATM networks. To evaluate estimated traffic descriptors (TDs) accuracy, we simulate the transport of the MPEG-4 SPTSs over an ATM network with a traffic policing function in the access...

"In this paper a combined input-output queuing ATM switch with m internal links for cell transfer is proposed. A single buffer is used at each input, whereas each output needs m buffers, where m is the number of internal links (or channels) that connect each input to m output buffers. The proposed structure uses physical internal links instead of time...

"The paper presents the analysis and results of traffic measurements in the 155 Mbit/s ATM backbone network. The traffic is described as an ordered sequence of real\u2013time cells. We present an evaluation of cell flow characteristics in a real working ATM network, analysis of cell distribution based on experimental data, and analysis of cell...

"Handoff behavior induced by user mobility is a unique phenomenon existing in wireless mobile communication networks. A connection once established may have to undergo a number of handoffs before it is hung up or dropped. A two-state Markovian queueing model is constructed in this paper to understand the performance of a VBR call in a wireless ATM...

"Several adaptive transmission schemes have been proposed to improve the performance of wireless networks. In this context, adaptive modulation has received a lot of attention in the last few years. In this paper we have compared, based on analytical expressions, the adaptive FEC (Forward Error Correction) and adaptive modulation approaches. We have...