AnÃlise experimental da degradaÃÃo imposta por sistemas Ãpticos a aplicaÃÃes IP / Experimental analysis of the degradation imposed by optical systems on IP

AUTOR(ES)

Victor Ishizuca Teles

DATA DE PUBLICAÇÃO

2010

RESUMO

The objective of this work is to experimentally evaluate how physical impairments on the network can affect the performance of IP applications. Especially This work encompasses the analysis of the cross-layer effect caused by all-optical wavelength converters in the video signal. For this purpose, it was evaluated the packet error rate degradationcaused by physical layer parameters. Such analysis was made for a video signal propagation through the KyaTera Network, followed by an all optical wavelength conversion. The experimental results allowed concluding that converted signals separated by up to 1.5 THz from the original signal may experience 2.1-dB penalty. This fact indicates that for each wavelength conversion the signal propagation range will be reduced in 10 km (Considering an attenuation of 0.2 dB/km in the transmission fibers). It was also verified that the presence of the all-optical wavelength converter in the network implies a 16-dB power penalty. For this reason the wavelength conversion is a viable option for cases where the propagation distance for the unconverted signal is larger than 80 km. Results indicate the existence of a strong relation between the packet error rate and the degradation of the optical signal-noise ratio caused by the mentioned converter. It was not found any reference in the literature of any work with this type of characterization. Additionally, experiments to emulate the degradation of the video signals transmitted through links with a cascade of optical amplifiers were also performed. The results indicate that the packet error rate is related not only with optical signal-noise ratio, but also with the received signal power.

ASSUNTO(S)

cross- layer cross-layer conversÃo de comprimentos de onda totalmente Ãptica all-optical wavelength conversion telecomunicacoes taxa de erro de pacotes packet error rate

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