Good point. On Aug 31, 2010, at 10:58 PM, Blair Davis wrote:
> Yes. That is why we have ACK time settings in 802.11 radios. > > Greg Ihnen wrote: >> >> At near the speed of light is the distance of a 20~40 miles really a factor? >> >> Greg >> On Aug 31, 2010, at 5:32 PM, MDK wrote: >> >> >>> As the distances go up, the longer it takes for the packet to be >>> transmitted >>> from one point to another, and the round trip time grows, which reduces the >>> throughput. >>> >>> My experience is, that it would be all but impossible to do two parallel >>> links in 5 ghz with UBNT stuff, as the antennas are not sufficiently >>> isolated from each other, and despite being on channels that don't overlap, >>> they still seem to have issues from strong nearby signals. And that >>> would >>> be even more true, using 40 mhz channels, as the spectrum it's "listening" >>> to is so much wider. >>> >>> >>> Perhaps my early hardware hasn't the selectivity of later, but I haven't >>> heard there's significant differences. >>> >>> It was really my first thought, but so far I don't see it as viable unless >>> somehow I can physically isolate the two links so they don't hear the >>> closer >>> transmitter. >>> >>> ++++++++++++++++++++++++++++++ >>> Neofast, Inc, Making internet easy >>> 541-969-8200 509-386-4589 >>> ++++++++++++++++++++++++++++++ >>> >>> -------------------------------------------------- >>> From: "Faisal Imtiaz" <fai...@snappydsl.net> >>> Sent: Tuesday, August 31, 2010 8:49 AM >>> To: "WISPA General List" <wireless@wispa.org> >>> Subject: Re: [WISPA] Suggestions for high bandwidth @ 25 miles. >>> >>> >>>> On 8/31/2010 11:44 AM, MDK wrote: >>>> >>>>> Even when the radio rates stay up, throughput falls. >>>>> >>>> Haven't seen that..... There are some issues as such due to alignment, >>>> firmware and Ack settings... that affect all links, medium range & long >>>> range. >>>> >>>> To get to higher end of the throughput / over the air rate, you will >>>> need to use 40meg channel / have a nice clean connection in the -60's... >>>> >>>> Faisal >>>> >>>> >>>> -------------------------------------------------------------------------------- >>>> 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/
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