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Sociedade Brasileira de Telecomunicações

2010 - VII International Telecommunications Symposium



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 First Glance Comparison of Next and New Generation Network Approaches

ext Generation etworks ( xG ), as pursued by international standards development organizations, represent the telecommunication operator approach to ...

SBrT 2010


Improving EGPRS Capacity using Orthogonal Sub Channels (OSC)

Due to the increasing demand for data services in mobile networks, operators are observing the quality of data services to degrade as their packed switched...

SBrT 2010


Self-similar QoS Manager: a bio-inspired approach

This work presents a Self-similar QoS Manager using a immunological algorithm to optimize a MPLS network. The system receives a set of requirements, impose...

SBrT 2010


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