Foreword: The Public Safety Wireless Network (PSWN) Program is conducting an ongoing assessment of advancements in the wireless communications industry. The scope of this assessment is to identify emerging wireless services and technologies for potential public safety use in the near future and beyond. This document is the third in a series of studies on emerging wireless technologies. This par...

Wireless LAN (WLAN) positioning has received much attention due to its advantages with respect to indoor positioning. “Location fingerprinting” has been widely accepted as an effective method of implementing signal strength based positioning. In WLAN positioning, the mobile user’s (MU) orientation has a significant impact on the received signal strength from an Access Point, and has been addres...

This paper present our color constancy investigation in the hybridization of Wireless LAN and Camera positioning in the mobile phone. Five typical color constancy schemes are analyzed in different location environment. The results can be used to combine with RF signals from Wireless LAN positioning by using model fitting approach in order to establish absolute positioning output. There is no co...

Abstrnct In this paper, we design a novel fuzzy controller to dynamically adjust the packet length to against the interference from microwave oven over the IEEE 802.11 FHSS (Frequency Hopping Spread Spectrum) wireless LAN card. The idea of adjusting the packet length under the noise environment is referring from the measurement results about the effects of microwave ovens over the wireless LAN ...

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...

Wireless automation is today an emerging topic. Industrial wireless solutions are based on Bluetooth, Wireless LAN, IEEE 802.15.4 or even proprietary radio technologies. This paper describes the functions of different wireless technologies within a Virtual Automation Network (VAN). It is shown how the VAN device architecture is applied to wireless solutions. This includes the definition of gene...

With the rapid growth of wireless technologies, there will be coexistent heterogeneous wireless networks environment within a few years. For example, there may be coexistent current wireless LAN systems based on widely available IEEE 802.11 and a wireless system based on proprietary wireless standard with different AAA mechanisms such as RADIUS and Diameter. In case of being coexistent the hete...