Розробка моделі оцінювання впливу архітектурних перешкод на основні параметри безпровідного каналу стандарту 802.11

Abstract

The main structural unit of 802.11 networks is the wireless channel. Its characteristics are influenced by a large number of destabilizing factors. The most important of them are interference and noise, architectural noise, multi-beam propagation, receiver sensitivity and more. The most reliable way to assess such factors is to create empirical models that would expand the possibilities of technical diagnostics of 802.11 wireless networks at the design stages and during the connection to the networks of new devices. The paper proposes an empirical model for estimating the impact of architectural obstacles on the main parameters of the 802.11 wireless channel on the basis of energy and information efficiency of the channel. The model is valid for short channels up to 16 m long and is independent of the effect of multi-beam propagation of waves that bring objects into the room. In contrast to existing research, this model takes into account the attenuation and attenuation coefficients, which makes it possible to take into account the density, thickness or number of interferences, and their impact on the multipath propagation of waves. But to increase the reliability of the assessment using the proposed model, it is necessary to conduct a significant amount of empirical research and create a base of coefficients, which is a minor drawback. The study of the obtained model showed that a high level of adequacy can be obtained on the basis of empirical studies with reference regression models of diagnostic parameters that can be obtained for direct visibility between transmitter and receiver with the exception of destabilizing factors. In addition, it was found that the use of only the signal attenuation factor in assessing the impact of architectural interference, can lead to significant errors. The obtained model can be used as an extension of the channel model based on energy and information efficiency coefficients to increase the reliability of the assessment of diagnostic parameters during the technical diagnostics of 802.11 wireless channels.