Estimação de vazão baseada em modelagem e simulação do controle de acesso ao meio em redes PLC

• Autor(a) principal: VASQUES, Thiago Lara
• Data de Publicação: 2010
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Repositório Institucional da UFG
• dARK ID: ark:/38995/0013000002dq6
• Texto Completo: http://repositorio.bc.ufg.br/tede/handle/tde/959
• topic: PLC; BPL; HomePlug; CSMA/CA; Vazão; Simulador; Redes PLC; BPL; HomePlug; CSMA/CA; Simulador; PLC; BPL; HomePlug; CSMA/CA; Throughput; Simulation; CNPQ::ENGENHARIAS

We carried out a study on throughput estimation based on analysis and modeling of the medium access control in HomePlug 1.0 standard based PLC networks. The data communication using electrical energy wires has advantages such as presenting characteristics of ubiquity due to the existent infrastructure, but faces significant obstacles as fading and noise. The main standard of this kind of home network is the HomePlug, which defines a protocol based on the method of multiple access with collision avoidance (CSMA/CA). The HomePlug adds to the CSMA/CA a technique called deferral counter (DC) that adapts the contention of the nodes in accessing the medium according to network load. The objective of this work is todo a comparative study of the throughput, which is the ratio of the packet payload, i.e., the amount of data that is inserted into the body of the datagram, and the frame transmission time. To this end, we evaluate what is the theoretical maximum throughput of the PLC channel, we developed a simulator for the CSMA/CA and we propose a simple probabilistic model to describe the throughput on the network PLC. Finally, we make a comparison between the results obtained with the simulator and the probabilistic model to those observed from a real PLC network, proving that the results of the theoretical maximum throughput and the simulation results are close and that the probability model becomes a tool for calculating throughput in PLC networks.