Planejamento e gerenciamento de recursos para redes IEEE 802.16 baseadas em rádio sobre fibra / Resource planning and management for IEEE 802.16 networks based on radio over fiber

AUTOR(ES)
FONTE

IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia

DATA DE PUBLICAÇÃO

17/06/2011

RESUMO

The Radio over Fiber technology allows the reduction of the cost of installation and maintenance of wireless access networks, since it can allow an optimized use of radio frequency (RF). Moreover, it employs simplified and inexpensive antennas. The IEEE 802.16 wireless networks, known as WiMAX, are low cost solutions for the last mile access to the Internet. Its characteristics are very similar to those of cellular networks, which makes attractive the use of RoF technology for the installation and expansion of WiMAX networks at low cost. This dissertation studies the use of RoF technology for WiMAX networks, which considers the parameters of physical layer and medium access synchronization. Results can be used as guideline for planning of these networks. This dissertation also studies the optimization of the use of radio resources of the network, specifically the problem of positioning base stations. The proposed architecture considers a wireless network with several layers of antennas, each layer with cells of different radii of coverage. The cells are deployed dynamically by the association between antennas and the available base stations. It is proposed a network optimization model based on integer linear programming that optimally distributes the radio resources and finds the best configuration to either minimize the number of Base Stations used in the network, or to maximize the operator revenue, as well as ato try to achieve both criteria simultaneously. The computational cost of the proposed optimization problem is quite high, which prevents its use in mobile networks. To circumvent this problem, it is also presented fast algorithms based on linear relaxation of the integer linear programming model, which enable the obtainment of good solutions in short time frames

ASSUNTO(S)

radiofrequência sistemas de comunicação sem fio sistemas de telecomunicação programação linear métodos de relaxação (matemática) radio frequency wireless communication systems telecommunication systems linear programming relaxation methods (mathematics)

ACESSO AO ARTIGO

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