John, The 2.5 GHz will push better for two reasons, one the power is higher, and two, the product sophistication is much higher, with multiple diversity options to dramatically improve link budgets.
Tower height is the same you'd plan for with 2.4 GHz. CPE choices will range from outdoor mounted models to self-install with integrated antennas using beam-forming and other advanced techniques. Some also offer self-install with an external connector option for a window mount antenna (at least ours does). Our outdoor uses a single antenna. Our Si uses 6 built-in antennae that implement a dynamic/real time patent-pending fast switching algorithm. 900MHz will still get you farther I would think. Patrick Leary AVP, Market Development Alvarion, Inc. o: 650.314.2628 c: 760.580.0080 [EMAIL PROTECTED] -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of John Valenti Sent: Thursday, October 04, 2007 9:57 AM To: WISPA General List Subject: [WISPA] RF propagation map: WiFi vs WiMax? Just curious if anyone has seen a coverage map that compares WiFi and WiMax? I spent a little bit of time researching WiMax, but decided I would be unlikely to have a license and to just go with what I have that mostly works (unlicensed). But I would like to know what WiMax means in a rural, tree filled environment. As a novice WISP (about 18 months now), I can only hope for good coverage with 2.4GHz to maybe a mile. A rare house might have LOS farther than that, but generally there will be enough trees in the way by a mile to block my signal. (this is using farm grain legs/ silos for the AP, so maybe 150' max AGL) If I switch to 900MHz, maybe the distance gets out to 2.5 miles. Would a 2.5GHz Wimax AP push the signal much better thru trees? I suppose it would make a difference what was at the customer end - a laptop with a WiMax card vs a fixed, outdoor radio. And does AP height help a lot? I don't see an advantage to paying commercial tower rates to get above 200' in my situation, but maybe that changes with WiMax. ------------------------------------------------------------------------ -------- ** Join us at the WISPA Reception at 6:30 PM on October the 16th 2007 at ISPCON ** ** ISPCON Fall 2007 - October 16-18 - San Jose, CA www.ispcon.com ** ** THE INTERNET INDUSTRY EVENT ** ** FREE Exhibits and Events Pass available until August 31 ** ** Use Customer Code WSEMF7 when you register online at http://www.ispcon.com/register.php ** ------------------------------------------------------------------------ -------- WISPA Wants You! Join today! http://signup.wispa.org/ ------------------------------------------------------------------------ -------- WISPA Wireless List: [email protected] Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/ ************************************************************************ ************ This footnote confirms that this email message has been scanned by PineApp Mail-SeCure for the presence of malicious code, vandals & computer viruses(190). ************************************************************************ ************ ************************************************************************ ************ This footnote confirms that this email message has been scanned by PineApp Mail-SeCure for the presence of malicious code, vandals & computer viruses(43). ************************************************************************ ************ ************************************************************************************ This footnote confirms that this email message has been scanned by PineApp Mail-SeCure for the presence of malicious code, vandals & computer viruses(84). ************************************************************************************ ************************************************************************************ This footnote confirms that this email message has been scanned by PineApp Mail-SeCure for the presence of malicious code, vandals & computer viruses. ************************************************************************************ -------------------------------------------------------------------------------- ** Join us at the WISPA Reception at 6:30 PM on October the 16th 2007 at ISPCON ** ** ISPCON Fall 2007 - October 16-18 - San Jose, CA www.ispcon.com ** ** THE INTERNET INDUSTRY EVENT ** ** FREE Exhibits and Events Pass available until August 31 ** ** Use Customer Code WSEMF7 when you register online at http://www.ispcon.com/register.php ** -------------------------------------------------------------------------------- WISPA Wants You! Join today! http://signup.wispa.org/ -------------------------------------------------------------------------------- WISPA Wireless List: [email protected] Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/
