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Sociedade Brasileira de Telecomunicações

2010 - VII International Telecommunications Symposium



An Evaluation of the Effects of Propagation Channels on the Performance of WiMAX (IEEE 802.16-2004)

The purpose of this paper is to evaluate the performance of fixed-WiMAX (IEEE 802.16-2004) operating in seven propagation channel models, by implementing a W...

SBrT 2010


Fiber Bragg Grating Compression-based Tuning Device for Reconfigurable OADM

In this work a fast Bragg grating-based tuning device, working according to the mechanical compression of the fiber, is demonstrated. The device achieves a...

SBrT 2010


An Application Server Approach for Number Portability in IMS networks

Number portability (NP) is an important requirement present in most telephony networks. Typically, NP is regulated by local legislation and is inherently a...

SBrT 2010


A New Model for VoIP Traffic Generation

In this work a new model for VoIP traffic generation is proposed. The innovation of this model consists in modeling the user behavior instead of the aggreg...

SBrT 2010