June 22, 2007
AirMagnet updates WLAN site survey
AirMagnet has released a version of its wireless LAN mapping application that includes a companion program for creating and refining the initial WLAN design.
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June 19, 2007
P2P-Based Roaming Between Home WLAN Hotspots
The increased amount of broadband Internet connections at home, combined with the low cost of WLAN access points and other WLAN hardware, has made it possible for individual end-users to contribute to the wireless landscape by allowing open access to their WLAN access points. Consumers’ WLAN access points and emerging handsets equipped with WLAN capability provide an opportunity for P2P-type of wireless coverage. Current metropolitan areas are already to some extent covered by consumer home WLAN networks and can ideally form one big network which then can be used freely by members of a community. This paper concentrates on describing the current situation in P2P-based roaming between home WLAN hotspots, what are its pros and cons, and why it is being done.
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Voice over WLAN (VoWLAN) is a natural evolution of VoIP. It is also a potential supplement or a potential competitor to 3G mobile systems. This paper presents an overview of WLAN technologies and the issues that are relevant for voice communication over WLAN. The basic IEEE 802.11 mechanisms are described, as well as new security and QoS mechanisms recently being standardised by IEEE. Handover issues are addressed. A review of available papers on real-time communication over WLAN highlights the challenges to VoWLAN. There is also a short discussion on 3G-VoWLAN interworking. Finally user equipment aspects and the market potentials are discussed.
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