Wireless local area networks (WLANs) have appeared in many venues, including academic and corporate campuses, residences, and wireless ‘‘hotspots.’’ It becomes increasingly important to understand how these networks are used, as they continue to appear in more numerous and varied environments. Measuring and collecting data from production WLANs in a usage study is one way of fulfilling this nee...

*Correspondence to: Gilbert Held, 4-Degree Consulting, 4736 Oxford Road, Macon, GA 31210, USA. E-mail: [email protected] Over the past few years the use of wireless LANs has evolved from a curiosity to a necessity. When we travel to many Starbucks or McDonalds, visit an airport or check into a hotel or motel the chances are high that we are able to access the Internet via a wireless LAN connec...

Wireless networking is becoming increasingly prevalent in modern networked environments. This paper examined methods used to secure wireless networks from intrusion and eavesdropping. WEP, WPA and RSN were examined to see the progression from weak to much stronger security for wireless LANs. WEP was incredibly insecure, but these vulnerabilities were addressed to produce significantly more secu...

Real-time applications such as phone, videoconference, multimedia streaming, are typical applications which require relatively small delay and small delay fluctuation. To meet the QoS requirements of these applications, network infrastructures should have the ability to accommodate real-time traffic. Recently, IEEE802.11 wireless LANs, fundamentally based on CSMA/CA, have been widely used as pa...

Wi-Fi applications have blossomed tremendously over the last few years. What started out as cable replacement for static desktops in indoor networks has been extended to fully mobile broadband applications involving wide-area outdoor community networks, moving vehicles, high-speed trains, and even airplanes. Wi-Fi data rates have also continued to increase from 2 to 54 Mbit/s with current 802.1...

Real-time applications such as phone, videoconference, multimedia streaming, are typical applications which require relatively small delay and small delay fluctuation. To meet the QoS requirements of these applications, network infrastructures should have the ability to accommodate real-time traffic. Recently, IEEE802.11 wireless LANs, fundamentally based on CSMA/CA, have been widely used as pa...

Wireless Communication is an application of science and technology that has come to be vital for modern existence. From the early radio and telephone to current devices such as mobile phones and laptops, accessing the global network has become the most essential and indispensable part of our lifestyle. Wireless communication is an ever developing field, and the future holds many possibilities i...

In recent years, propagation channel characteristics have been effectively used in several applications such as motion sensing and position detection. Considerable attention has paid to channel-sounding methods that are easy utilize using low-cost devices. This paper presents a device-free indoor location estimation method the spatio-temporal features of radio channels 2.4 GHz-band three-by-thr...