Individuals increasingly work from nontraditional office environments and expect to use their mobile phones wherever they work. At the same time that the mobile workforce is growing, enterprises are deploying Internet Protocol (IP) Telephony (IPT) and unified communications (UC) solutions. IPT systems provide new capabilities to virtualize communications across the enterprise, breaking the linkage between [...]
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This is the fifth post in a series that delves into the subject of beamforming. In this post, we compare all three beamforming methods (static, transmit, dynamic). Although all three beamforming technologies provide SNR gain, they are quite different. In addition, all types of beamforming can exacerbate the following problems: Sticky client problem: The sticky client [...] Dynamic beamforming focuses RF energy in a particular direction and with a particular shape in order to increase the Signal to Noise Ratio (SNR). In a sense, it is like static beamforming in that it focuses RF energy, but it is different because the antenna array’s radiation pattern can change from frame to frame (see [...] In this post, we continue my discussion of beamforming by focusing on transmit beamforming. As previously mentioned, beamforming is a method of concentrating radio frequency (RF) energy in order to improve the signal to noise ratio (SNR) at the receiver, thereby improving network performance and predictability. Transmit beamforming (TxBF) is a method of transmitting two or [...] This post continues my discussion on beamforming which is a method of concentrating radio frequency (RF) energy in order to improve the signal to noise ratio (SNR) at the receiver, thereby improving network performance and predictability. In this post, we discuss static beamforming. Static beamforming provides a fixed radiation pattern by using a directional antenna. Virtually [...] Beamforming is a method of concentrating radio frequency (RF) energy in order to improve the signal to noise ratio (SNR) at the receiver, thereby improving network performance and predictability. Enterprise WLAN vendors are now integrating beamforming technology into their access points (APs) so it is important to understand the types of beamforming and the benefits [...] Does anyone really care that the IEEE finally ratified the 802.11n wireless standard…anyone…anyone…Bueller? The sorry fact is that the final ratification will have virtually no impact on the wireless industry. This is because what customers care about most is product interoperability. The Wi-Fi Alliance stepped into the standards void in 2007 and began certifying [...] Introduction Back in November of 2008 I wrote about the Wi-Fi Protected Access (WPA) attack by the German graduate students Erik Tews and Martin Beck. They discovered a limited method to crack WPA, or more specifically, to crack the My new report entitled “Demystifying Radio Management“ is now published. Thank you to everyone who provided feedback on my drafts. Fortunately, Burton Group has decided to make this report available for free. Below is a summary and also a link to the free report. As always, comments are welcome. Summary:Wireless local area network (WLAN) vendors have [...] One of the problems that enterprise customers unfortunately endure is the endless stream of vendor-invented wireless terminology. Vendors use this techno-jargon marketing-speak to differentiate themselves but oftentimes the terminology simply confuses customers. So, over the past month I’ve been working on a W-Fi lexicon with Joanie Wexler (a well known wireless journalist) and Devin Akin [...] |
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