scholarly journals TECHNICAL PRINCIPLES FOR CREATING A WIRELESS LOCAL NETWORK WI-FI

T-Comm ◽  
2021 ◽  
Vol 15 (7) ◽  
pp. 28-33
Author(s):  
Albina Y. Sharifullina ◽  
◽  
Roman R. Galyamov ◽  
Rimma S. Zaripova ◽  
◽  
...  
Keyword(s):  
Wireless Networks ◽  
Wireless Network ◽  
Wireless Lan ◽  
Wireless Local Area Network ◽  
Local Area Network ◽  
Local Area ◽  
Local Network ◽  
Area Network ◽  
Access Points ◽  
Basic Service

This article discusses the stages of development, characteristics of a wireless local area network Wi-Fi, options for its topology and equipment used. Currently, there are such different types of wireless networks as Wireless Wide Area Network, Wireless Metropolitan Area Networks (Wireless Neighborhood Area Network), Wireless Local Area Network, Wireless Personal Area Network. Each of the listed wireless networks has its own specific range and application. Wireless LAN Wi-Fi refers to the Wireless Local Area Network. The first wireless LAN standard, Wi-Fi, was approved in 1997. From the moment of their appearance to the present day, the following standards of this network have appeared: 802.11a, 802.11b, 802.11g, 802.11n, 802.11ac, 802.11ad, 802.11ax. For each standard, the speeds and frequency ranges at which the data transmission was carried out are indicated, and the technologies on which they are built are described. Wireless LAN Wi-Fi has three topologies: 1) Ad-Hoc (point-to-point) or Independent Basic Service Set; 2) Basic Service Set (“client / server”) and 3) Extended Service Set (“extended service areas”). To build a Wi-Fi network, network adapters, access points, routers, ADSL modems, Wi-Fi phones, Wi-Fi antennas, Wi-Fi repeaters are used. Wi-Fi adapters are used by devices that do not have a built-in Wi-Fi module. Wi-Fi access points are designed for organizing wireless access within a local network. Wi-Fi routers are designed to route traffic on a computer network. ADSL modems are used to access the Internet over a telephone line. Wi-Fi repeaters are used to expand the coverage of a wireless network using already installed equipment. Wi-Fi phones are wireless IP phones. Wi-Fi antennas are used to extend the range of a wireless network.

Channel Assignment Algorithm in Centralized WLAN

2014 ◽  
Vol 721 ◽  
pp. 728-731
Author(s):  
Da Wei Dong ◽  
Xiao Guo Liu ◽  
Tian Jing
Keyword(s):  
Channel Assignment ◽  
Wireless Lan ◽  
Wireless Local Area Network ◽  
Local Area Network ◽  
Local Area ◽  
Area Network ◽  
Dynamic Adjustment ◽  
Access Points ◽  
Received Power ◽  
Assignment Algorithm

To reduce the number of inter-disturb access points and the interference among access points in same channel, with research on interference issus and channel assignment algorithms of wireless local area network, a scheme suitable for centralized wireless local area network was proposed aiming to minimize the total interference among access points, which comprehensively considerate the number of neighbor and the received power. And then the algorithm with cases was simulated and analyzed, the result of NS2 simulation indicated that the algorithm was simple, effective and feasible, which could realize dynamic adjustment to the wireless LAN RF channel and had a better load balance effect among non-overlapping channels.

Wireless Security

2008 ◽  
pp. 409-446
Author(s):  
Manuel Mogollon
Keyword(s):  
Wireless Networks ◽  
Access Control ◽  
Metropolitan Area ◽  
Wireless Lan ◽  
Wireless Local Area Network ◽  
Local Area Network ◽  
Local Area ◽  
Area Network ◽  
Metropolitan Area Network ◽  
Personal Area Network

The nature of wireless is that of a physically open medium which makes authentication, access control, and confidentiality necessary in the implementation of a wireless LAN. There are three primary categories of networks: wireless local area network (WLAN), wireless metropolitan-area network (WMAN), and wireless personal area network (WPAN). The security for each of these types of wireless networks is discussed in this chapter.

PERANCANGAN ANTENA MIKROSTRIPRECTANGULAR

Jurnal Teknik ◽  
2018 ◽  
Vol 7 (1) ◽  
Author(s):  
Heru Abrianto
Keyword(s):  
Dielectric Constant ◽  
Patch Antenna ◽  
Wireless Lan ◽  
Microstrip Antenna ◽  
Wireless Local Area Network ◽  
Local Area Network ◽  
Local Area ◽  
Area Network ◽  
Dual Polarization ◽  
Feeding Technique

Microstrip antenna which designed with dual feeding at 2.4 GHz and 5.8 GHz can meet WLAN (Wireless Local Area Network) application.Antenna fabrication use PCB FR4 double layer with thickness 1.6 mm and dielectric constant value 4.4. The length of patch antenna according to calculation 28.63 mm, but to get needed parameter length of patch should be optimized to 53 mm. After examination, this antenna has VSWR 1.212 at 2.42 GHz and 1.502 at 5.8 GHz, RL -13.94 dB at 2.42 GHz and -20.357 dB at 5.8 GHz, gain of antenna 6.16 dB at 2.42 GHz and 6.91 dB at 5.8 GHz, the radiation pattern is bidirectional. Keywords : microstrip antenna, wireless LAN, dual polarization, single feeding technique

Wireless Local Area Network Based Fire Monitoring Robot Design

2013 ◽  
Vol 278-280 ◽  
pp. 582-585
Author(s):  
Rong Gao ◽  
Qi Sheng Wu ◽  
Lan Bai
Keyword(s):  
Wireless Lan ◽  
Wireless Local Area Network ◽  
Local Area Network ◽  
Infrared Image ◽  
Local Area ◽  
Area Network ◽  
Fire Event ◽  
Fire Monitoring ◽  
Remote Terminal ◽  
Long Wave Infrared

A tms320dm642 and wireless fidelity based fire monitoring robot is designed. Flame features, both static and dynamic detecting algorithm, combine with long wave infrared (LWIR) is equipped to achieve the goal of monitoring fire. When the suspected fire event happens, Fire warning message will be sent to remote terminal through the wireless LAN automatically. Infrared image of the fire can be transmitted through the wireless network under the control of remote terminal. As LWIR camera can even look through the dense smoke of fire, fire source will be located accurately, rescuing and fire fighting work will carry on better and with less injury.

Implementation of a Digital Radiographic Image Acquisition and Retrieval System (DRIARS) Using a Wireless Network in an Orthodontic Department

2008 ◽  
Vol 9 (4) ◽  
pp. 115-123 ◽  
Author(s):  
Muralidhar Mupparapu ◽  
Robert E. Binder ◽  
John M. Cummins ◽  
Cecile A. Feldman ◽  
Mark A. Cappelli ◽  
...  
Keyword(s):  
Wireless Network ◽  
Retrieval System ◽  
Wireless Local Area Network ◽  
Local Area Network ◽  
Image Acquisition ◽  
Local Area ◽  
Dental School ◽  
Area Network ◽  
Radiographic Image ◽  
X Ray

Abstract Aim The objective of this report is to describe the implementation and pilot-test of an integrated wireless local area network (WLAN) system that incorporated the Planmeca Promax® CCD based digital panoramic/ cephalometric x-ray system, Dolphin® software, and multiple remote user units to increase the efficiency of data management by the residents in the Department of Orthodontics. Background The Department of Orthodontics of the New Jersey Dental School (NJDS) acquired the Dolphin® cephalometric analysis software and the Planmeca Promax® digital panoramic/cephalometric x-ray units on separate occasions. Dolphin has been in use for many years at this institution, the current version being 10, and the Promax was acquired in the Fall of 2002. The digital panoramic and cephalometric radiographs were acquired and stored separately in the Planmeca's Dimaxis database. Report During the incorporation of the WLAN, there was an opportunity to research and install the best available security system for the WLAN so it could be a network model for the other departments within the dental school and perhaps other dental schools around the nation. Summary Digital radiographs, once obtained, can be stored locally or transmitted securely to remote locations via a local area network. This article describes the selection criteria and methodology that would optimize the transmission and retrieval of such images instantaneously on demand at chair side locations. This will not only save significant clinical time but will enhance the productivity of the clinic in the long run. Citation Mupparapu M, Binder RE, Cummins JM, Feldman CA, Cappelli MA, Matheson PB. Implementation of a Digital Radiographic Image Acquisition and Retrieval System (DRIARS) Using a Wireless Network in an Orthodontic Department. J Contemp Dent Pract 2008 May; (9)4:115-123.

scholarly journals A Cross-Layer Key Management Scheme for MIPv6 Fast Handover over IEEE 802.11 Wireless LAN

2015 ◽  
Vol 2015 ◽  
pp. 1-11
Author(s):  
Chang-Seop Park ◽  
Hyun-Sun Kang ◽  
Jaijin Jung
Keyword(s):  
Ieee 802.11 ◽  
Key Management ◽  
Wireless Lan ◽  
Wireless Local Area Network ◽  
Local Area Network ◽  
Local Area ◽  
Mobile Ipv6 ◽  
Area Network ◽  
Fast Handover ◽  
Security Scheme

A new key management and security scheme is proposed to integrate Layer Two (L2) and Layer Three (L3) keys for secure and fast Mobile IPv6 handover over IEEE 802.11 Wireless Local Area Network (WLAN). Unlike the original IEEE 802.11-based Mobile IPv6 Fast Handover (FMIPv6) that requires time-consuming IEEE 802.1x-based Extensible Authentication Protocol (EAP) authentication on each L3 handover, the newly proposed key management and security scheme requires only one 802.1x-EAP regardless of how many L3 handovers occur. Therefore, the proposed scheme reduces the handover latency that results from a lengthy 802.1x-based EAP. The proposed key management and security scheme is extensively analyzed in terms of security and performance, and the proposed security scheme is shown to be more secure than those that were previously proposed.

scholarly journals The concept of Virtual Contention Window for 802.11 IBSS wireless local area network mathematic modeling

2012 ◽  
Vol 16 (6) ◽  
pp. 39-45
Author(s):  
A.V. Lazebnyi ◽  
Volodymyr Semenovych Lazebnyi
Keyword(s):  
Packet Loss ◽  
Wireless Lan ◽  
Wireless Local Area Network ◽  
Local Area Network ◽  
Local Area ◽  
Wireless Channel ◽  
Contention Window ◽  
Transmission Time ◽  
Area Network ◽  
Mathematic Modeling

The concept of a virtual contention window for assessment of temporal and probabilistic characteristics of the processes occurring in the wireless LAN 802.11 is considered. The relations for determining the transmission time delay of the data package, the uneven of transmission time, throughput of wireless channel, the probability of packet loss for networks with saturated load are proposed in this paper.

scholarly journals Anticipating WPS PIN Vulnerability to Secure Wireless Network

2013 ◽  
Vol 4 (2) ◽  
pp. 1116
Author(s):  
Indra Dwi Rianto
Keyword(s):  
Wireless Network ◽  
Wireless Local Area Network ◽  
Local Area Network ◽  
Access Point ◽  
Local Area ◽  
Area Network ◽  
Security Vulnerability ◽  
Design Flaw ◽  
Set Up

WiFi Protected Setup (WPS) is a standardized function supported by numerous vendors of wireless routers and access point to help set up connection to a wireless local area network. It is designed to simplify the set up and generally enabled by default. Due to design flaw, the WPS or QSS PIN is susceptible to a brute forceattack. In this paper, we test the security vulnerability occurred, evaluate the performance and give recommendations to anticipate the attack.

Sign in / Sign up

Export Citation Format

Share Document