They actually have over 200 tower sites from what I've been told. Each site has three or more transmitters. Our building for instance has 8x45° sectors (Kathrein cross polarized) and Motorola wi4 radios. We get up to 8Mbit burst speeds on the USB dongle but average speeds are between 2Mbit and the advertised 4Mbit. The residential units seem to perform as advertised (3Mibt or 6Mbit depending on your service package) under normal circumstances. Depends on your location of course.
As for oversubscription, we're still dealing with physics here and this is a shared medium. Expect to handle about 100-200 subscribers on the radio, but no more than 20-30 active users depending on usage patterns. The first thing to go will be latency, as each subscriber is given a window with which they can transmit (wimax is a polling protocol). Next you will see bandwidth drop as more and more time slots are taken up by other users. "At what point is an access point oversubscribed" is a loaded question.....but for the most part, oversubscription is an ISPs business model and we would all be paying $300/month for basic internet service if ISPs didn't oversubscribe their residential and small business services. Tyler Booth // President ph. 503.548.2000 | fx. 503.548.2002 921 SW Washington St, Suite 224 Portland OR 97205 On Jan 7, 2009, at 1:52 PM, Joe Christensen wrote: > I have had a modem since December 2nd. I have a business account > and my speeds are nice and consistent: > http://www.speedtest.net/result/385493173.png > > I have been taking the modem with me around town and testing the > service (using a power inverter in the car). It has good reception > more often then not. 3/5 bars tend to deliver full throughput, but > 2 or less will start to drop the speeds. > > Of course the one place it does not work well is my home. I'm in > the Garden Home area. We have an elevation change between us and > the tower. At the top of the hill, good signal. At the bottom, 1 > bar. > > Do you know if the speeds will be maintainable once subscribers > start to load the network? At what point is an access point > oversubscribed? > > Joe > > > On Wed, Jan 7, 2009 at 1:41 PM, Tyler van Houwelingen <[email protected] > > wrote: > Has anyone tried out the clear service in Portland? we are hearing > that it is pretty awesome but have not tried it yet ourselves. I > know they have over 100 base stations out there, each with three > access points (samsung gear I believe) running 10MHz wide channels. > > tyler > > > > > > > --~--~---------~--~----~------------~-------~--~----~ The Personal Telco Project - http://www.personaltelco.net/ Donate to PTP: http://www.personaltelco.net/donate Archives: http://news.gmane.org/gmane.network.wireless.portland.general/ Etiquette: http://www.personaltelco.net/index.cgi/MailingListEtiquette List information: http://lists.personaltelco.net To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] -~----------~----~----~----~------~----~------~--~---
