Development of Information Models for Increasing the Evaluation Efficiency of Wireless Channel Parameters of 802.11 Standard

Abstract

The objective of the research is to develop information models in order to improve the efficiency of evaluating the parameters of the wireless channels in 802.11 standard. A feature of the information model of the wireless channel of 802.11 standard is an opportunity to evaluate the efficiency of transferring the information block taking into account the complete packet and frame transmission cycle in the event of errors in frames. In addition, the model accounts for the existence of other subscribers in the network and the mechanism of competition for the physical resource of the frequency channel. It has been established that channel efficiency is mostly affected by the presence of destabilizing factors in the channel, which lead to an increase in the number of service information and an increase in the transmission cycle due to the creation of reciprocal queries.

Method for estimating the effective data rate in 802.11 channels by using a monitoring algorithm

“…Given construction of the package (Mykhalevskiy & Kychak, 2019), the amount of useful information is expressed through an MPDU or MSDU frame: where L s.MPDU -is length of service information in the MPDU frame; L MSDU -is MSDU frame length; L MPDU -is MPDU frame length; L s.TCP / IP -is the length of TCP / IP protocol stack of service information.…”

“…The most commonly used estimations of this parameter are provided by the analytical calculation models based on the specifications of the channel construction standard. One of such studies is the work (Mykhalevskiy & Kychak, 2019) where it is proposed to use new mathematical models for estimation of information and energy efficiency of 802.11x family standard wireless channels. These models give possibility to evaluate the transmission efficiency of the block of information taking into account the full cycle of packet and frame transmission when errors occur in frames.…”

Оцінювання Надійності Виробів Електронної Техніки За Рівнем Низькочастотних Шумів

“…Шуми можуть бути викликані різними факторами впливу, включаючи як дефекти внутрішньої структури так і дією електромагнітних завад, механічних вібрацій, теплових шумів і ін. Відповідно, виробники електроніки повинні встановлювати межі допустимих рівнів шуму, на основі яких можна забезпечити відповідний рівень надійності та стабільної роботи пристроїв на основі ВЕТ (вироби електронної техніки) [1]. Контроль ВЕТ за рівнем низькочастотних шумів, полягає у порівнянні основного інформативного параметра низькочастотного шуму із встановленими границями допуску [2].…”

Devising a technique to evaluate fluctuations in the main parameters of a wireless channel of the 802.11 standard

“…Deviations in the ΔP and ΔV parameters from the average statistical value is insignificant, in the worst cases, it is possible to obtain approximately ΔP±1.5 dBm and ΔV±0.5 Mb/s for the chi-square distribution, which is a rather high result. Such deviations are relatively small for fluctuations obtained empirically and can be automatically taken into consideration when setting a certain margin under bitrate control conditions and assessing channel capabilities [12,18].…”