Oops.... not offlist good thing it wasn't a secret ;) Scott Carullo Brevard Wireless 321-205-1100 x102
---------------------------------------- From: "Jeremie Chism" <jchi...@gmail.com> Sent: Monday, April 19, 2010 10:18 AM To: "WISPA General List" <wireless@wispa.org> Subject: Re: [WISPA] Alvarion 3.65ghz NLOS as good as 900mhz? All I can say is that the effects of a lower modulated customer on my alvarion system seem to have a more profound impact on the system than what I have seen so far on 3.65. Granted I've only had the wimax up for 8 months and that's the only data I have to go on. Sent from my iPhone On Apr 19, 2010, at 9:10 AM, Rubens Kuhl <rube...@gmail.com> wrote: > There is no protocol design that can achieve that. A TDD system is a > population of time slots; if a bunch of users (not just a couple) with > high traffic demand (not low traffic or small bursts) have low > modulation, it will talke more time slots to serve them. If a fairness > system based on bandwidth is in place them all of the users will still > suffer; if a fairness system based on time-slots is in place they > won't get the service you promised them. There is no free lunch. > > I've run a 3.5 GHz WiMAX system with 3.5 MHz channels and the base > station was always complaining the system was too oversubscribed; > guess what, it was right, we were trying to serve more than feasible > CIR/MIR traffic on those BSTs. Having a rule that only QAM16/QAM64 > stations were allowed improved this problem a lot. > > > Rubens > > > > > On Mon, Apr 19, 2010 at 10:55 AM, Kurt Fankhauser > <k...@wavelinc.com> wrote: >> I too have heard from others that WIMAX was designed so that the >> customers >> with poor connections don't take performance away from the rest >> with good >> connections. So far I have yet to hear ANYONE disprove this. >> >> Kurt Fankhauser >> WAVELINC >> P.O. Box 126 >> Bucyrus, OH 44820 >> 419-562-6405 >> www.wavelinc.com >> >> >> >> -----Original Message----- >> From: wireless-boun...@wispa.org [mailto:wireless- >> boun...@wispa.org] On >> Behalf Of Jeremie Chism >> Sent: Monday, April 19, 2010 9:24 AM >> To: WISPA General List >> Subject: Re: [WISPA] Alvarion 3.65ghz NLOS as good as 900mhz? >> >> I am not using alvarion 3.65 but I am using wimax. I have a couple >> customers with lower modulation because of non line of site >> situations >> and have seen no impact on the entire system in general. "Supposedly" >> wimax is engineered to handle some of this better than my alvarion >> 900. >> >> Sent from my iPhone >> >> On Apr 19, 2010, at 8:15 AM, Rubens Kuhl <rube...@gmail.com> wrote: >> >>> That would only be true if the data services are somewhat >>> purpose-specific and not Internet access. Doing what this vendor >>> told >>> you would seriously affect aggregate performance of the cell because >>> of low rate modulation of the NLOS and/or distant customers. >>> >>> If you are doing sensor networks or POS connection you will be fine >>> with all those BPSK/QPSK customers, indeed. >>> >>> >>> Rubens >>> >>> >>> On Mon, Apr 19, 2010 at 10:09 AM, Kurt Fankhauser >>> <k...@wavelinc.com> wrote: >>>> Has anyone seen the Alvarion 3.65ghz 802.16e equipment in >>>> operation? Was >>>> talking to one vendor that claimed if you run the system in MIMO >>>> that with >>>> the diversity you can do NLOS as good as 900mhz and if you get the >>>> AP on a >>>> 300ft tower that it starts to "feel" like 700mhz. He claimed the >>>> NLOS was so >>>> good that people are ripping out complete old systems of 900mhz and >>>> 2.4ghz >>>> and putting in the single system of 3.65ghz to serve their entire >>>> customer >>>> base. >>>> >>>> >>>> >>>> Just wondering if anyone has experience or having seen this >>>> firsthand. >>>> >>>> >>>> >>>> Kurt Fankhauser >>>> WAVELINC >>>> P.O. Box 126 >>>> Bucyrus, OH 44820 >>>> 419-562-6405 >>>> www.wavelinc.com >>>> >>>> >>>> >>>> >>>> >>>> >>>> >>>> >>>> >>>> --- >>>> --- >>>> --- >>>> --- >>>> --- >>>> ----------------------------------------------------------------- >>>> WISPA Wants You! Join today! >>>> http://signup.wispa.org/ >>>> --- >>>> --- >>>> --- >>>> --- >>>> --- >>>> ----------------------------------------------------------------- >>>> >>>> WISPA Wireless List: wireless@wispa.org >>>> >>>> Subscribe/Unsubscribe: >>>> http://lists.wispa.org/mailman/listinfo/wireless >>>> >>>> Archives: http://lists.wispa.org/pipermail/wireless/ >>>> >>> >>> >>> --- >>> --- >>> --- >>> --- >>> -------------------------------------------------------------------- >>> WISPA Wants You! Join today! >>> http://signup.wispa.org/ >>> --- >>> --- >>> --- >>> --- >>> -------------------------------------------------------------------- >>> >>> WISPA Wireless List: wireless@wispa.org >>> >>> Subscribe/Unsubscribe: >>> http://lists.wispa.org/mailman/listinfo/wireless >>> >>> Archives: http://lists.wispa.org/pipermail/wireless/ >> >> >> --- >> --- >> --- >> ------------------------------------------------------------------- >> ---- >> WISPA Wants You! Join today! >> http://signup.wispa.org/ >> --- >> --- >> --- >> ------------------------------------------------------------------- >> ---- >> >> WISPA Wireless List: wireless@wispa.org >> >> Subscribe/Unsubscribe: >> http://lists.wispa.org/mailman/listinfo/wireless >> >> Archives: http://lists.wispa.org/pipermail/wireless/ >> >> >> >> --- >> --- >> --- >> --- >> -------------------------------------------------------------------- >> WISPA Wants You! Join today! >> http://signup.wispa.org/ >> --- >> --- >> --- >> --- >> -------------------------------------------------------------------- >> >> WISPA Wireless List: wireless@wispa.org >> >> Subscribe/Unsubscribe: >> http://lists.wispa.org/mailman/listinfo/wireless >> >> Archives: http://lists.wispa.org/pipermail/wireless/ >> > > > --- > --- > --- > --- > -------------------------------------------------------------------- > WISPA Wants You! 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