Дослідження факторів впливу на оцінювання основних параметрів безпровідних каналів 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 reliable way to assess such factors is experimental research and the creation of empirical models based on them. The use of such models makes it possible to predict the efficiency of channels at the design stages and during connection to networks for fixed and mobile subscribers. To determine the factor influencing the characteristics of 802.11 devices from different manufacturers, empirical studies were conducted on the basis of an 802.11 wireless network, where there was one wireless channel based on a radio circuit and with minimal interference. The main parameters for the study were selected , such as effective data rate, bandwidth, signal strength at the input of the receiver. Based on the results of empirical research, new empirical models for estimating the basic parameters of 802.11 wireless channels on the basis of empirical research using monitoring algorithms are proposed. A feature of the proposed models is the ability to establish the factor of influence of the parameters of the receiving and transmitting equipment of different manufacturers, taking into account the length of the channel and the factor of limiting the speed of the internal data bus. Studies of the obtained models have shown that the decay coefficients have a negligible influence on the evaluation of the main parameters of the channel, but they are more dependent on other influencing factors. In most cases, differences in the transceiver path of different manufacturers can be estimated based on the initial levels of the models. Such parameters can be measured at a specific control point and evaluated along the entire length of the channel directly for the device under study using monitoring algorithms.