Abstract
Objectives: The growing demand of Wireless connectivity supported in the 802.11 standard has caused a high demand of wireless networks by the users, due to the benefits of mobility and low-cost implementation. Such networks have been used in common places such as houses, offices, schools among others. The objective of this article is to propose an empiric propagation model, supported in the Log-Normal-Shadowing Path Loss model for 2.4 GHz and 5 GHz bands in Indoor environments, compatible with University campus building. Methods/Statistical Analysis: A scenario of a six-storey building on a university campus was proposed, with dimensions of 60 m long, 34 m wide and 24 m high. Additionally, such building has 24 Access Points (AP) distributed in such a way that allow network to serve connectivity to its students. In order to establish the expressions that describe the Log-Normal-Shadowing Path Loss propagation model, an experimental design of factorial mixed type was considered involving three factors: frequency band (2.4 GHz or 5 GHz), condition of the media (Free space or with obstacles) and the distance between the receiver and the AP. The experiment aims to assess how each factor influences on the Received Signal Strength Indicator RSSI. Topic Significance: The proposed model will be used to run analysis of radio propagation in indoor environments using institutional educational buildings and holding a capacity of carrying out prediction processes of RSSI, in the 2.4 GHz and 5 GHz bands. Findings: Based on obtained results, it was possible to evidence that the established models allow predicting the behavior the reception power and signal damping, with a level of confidence of 95%. Additionally, it was possible to verify, in the 5 GHZ band, the damping levels are bigger that those in 2.4 GHz band. Such aspect holds great importance when it comes to perform design processes of Wireless networks. Applications/Improvements: In future research papers, it would be significantly important to establish the expression for outdoor environments, supported in the Shadowing Path model. Keywords: Channels Allocation, Efficiency, Optimization, Performance, SINR, WLAN
Highlights
During the last years, the demand of wireless networks by users has grown due to the benefits of mobility and low-cost implementation
Within the range of wireless networks, it is possible to locate the WLAN (Wireless Local Area Network), which have been used in common area s such as homes, offices, schools among others
Design of Empirical Propagation Models Supported in the Log-Normal Shadowing Model for the 2.4 GHz and 5 GHz Bands under Indoor Environments power of the transmission signal and the obstacles found by the signal in the environment in order to reach the user[1]
Summary
The demand of wireless networks by users has grown due to the benefits of mobility and low-cost implementation. Within the range of wireless networks, it is possible to locate the WLAN (Wireless Local Area Network), which have been used in common area s such as homes, offices, schools among others These kinds of networks are mainly formed by the use of aggregating devices called Access Point (AP), which allow users to connect wirelessly to the network, performing the same job that a switch in a wired network. In3 the most important propagation models in terms of WLAN are described Through those models it is possible to estimate the losses and the scope in the coverage, both conditions of the cannel when it comes to carry out a transmission process in both outdoor and indoor environments. It is possible to find: Log-Distance, ITU-R propagation model, COST 231 Keenan and Motleys model, COST 231 Multi-Wall model, and the list goes on
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