WiFi

Open architecture wireless lan

Quick Explanation

  • Supports RTS-CTS-Frame-acknowledgement protocol
  • Supports frame fragmentation with acknowledgement
  • Supports slot contention arbiter

Protocol

  • IEEE 802.11
  • IEEE 802.11a
  • IEEE 802.11b
  • IEEE 802.11g
  • IEEE 802.11n
  • IEEE 802.11ac
  • IEEE 802.11aj

Overview

VisualSim Wireless-Fidelity library provides a unique system level modelling environment to the users. This library is used for identifying different issues related to hidden terminal problem and exposed terminal problems. Wi-Fi provides a secure computer networking gateway, firewall, DHCP server and an intrusion detection system among many other features. VisualSim has been employed for design, validation, and evaluation of new protocols for Wi-Fi networks since it offers cost efficiency, scalability, and reproducibility.

Parameters used

An access point or a wireless router acting as an access point is typically configured with a utility program provided by the manufacturer of the device. Some of the blocks and parameters used in this library are:

  • WIF_Source: This block provides the user with the required traffic
  • Data_Rate: This parameter is used to specify the rate at which packets are sent
  • Operating_Freq: This parameter specifies the frequency at which packets are being sent

Features

A Basic Service Set is a set of wireless stations (STA) controlled by a single coordination function (CF). The CF is a logical function that determines when a STA transmits and when it receives. IEEE 802.11 wireless LANs use a media access control protocol called Carrier Sense Multiple Access with Collision Avoidance(CSMA/CA). The VisualSim Wi-Fi library uses Distributed Control Function (DCF) for collision avoidance

Some of the key features of this block are:

  • WPA and WPA2
  • EAP authentication standard
  • Full Duplex

WiFi

Wi-Fi stands for Wireless Fidelity. It was developed by the Institute of Electrical and Electronics Engineers (IEEE) in 1997. Wi-Fi is a technology for wireless local area networking with devices on the IEEE 802.11 standards. Wi-Fi most commonly uses the 2.4 GHz and 5.8 GHz SHF ISM radio bands. Wi-Fi nodes operating in ad-hoc mode refers to devices talking directly to each other without the need to talk first to an access point. The IEEE 802.11 standard is a set of media access control (MAC) and physical layer (PHY) specifications for implementing wireless local area network (WLAN) computer communication in the 2, 4, 3.6, 5 and 60 GHz frequency bands.

WiFi - Implements 802.11 wireless protocol