For clarity I think your statement needs to be expanded on just to make sure the strong points of GPS isn't lost.
For a single AP/PtP/PtMP link that's not geographically close to another AP which could cause mutual interference, performance with GPS on will be less than without GPS. For a situation with multiple APs/PtP/PtMP links geographically close enough to each other so that they would cause mutual interference then performance with GPS on will be better than without GPS. GPS helps in a very specific situation for which it is intended. Does anyone know if enabling GPS on with a solitary MOTO link causes a degradation? It seems like if it's designed and implemented right it wouldn't cause a degradation. Greg On Nov 9, 2011, at 8:15 PM, Faisal Imtiaz wrote: > Below attached email is the closest detailed description of someone > running Rocket M with GPS, was posted on WISPA_UBNT list. > > Folks @ Ubiquity have stated this before... > The GPS option is not to get more Performance on a single link... but > is to allow radios (AP's) to exist on the same tower or roof top to use > overlapping frequencies when pointing in different directions.. and > provide stable performance under these circumstances... > > i.e. performance with GPS on will be less than without GPS. > > and FWIW.. check the firmware you are using.. 5.4.3 is more stable, but > 5.5beta4 is also getting close to a full release.. > > > ========================= > On 6/24/2011 3:45 PM, Chuck Hogg wrote: >> I wanted to touch base as this is our first case of actually using >> GPS/AirSync. We have 2 dishes shooting about 15-20 degrees off of >> each other, same height, about 7' of separation. One link is 14 >> miles, the other 32 miles. Channel 5805 and 5825 and 20mhz Channels. >> >> Airsync off, both transferring data: >> 8x1Mbps each (best case, some tests wouldn't even work) >> pings all over the place >> >> Airsync on, both transferring data: >> 30x23Mbps on 32 miles >> 40x30Mbps on 14 miles >> pings stable >> >> Airsync off, only one passing traffic: >> 70Mbps transmit one way >> 30Mbps receive one way >> >> Very happy to see Airsync do it's job, but would be nice to have more >> bandwidth. The signals are -57 on each link with a noise floor of >> -91. We do have a larger dish on the 32 mile link. >> >> Regards, >> Chuck > ======================================== > > Faisal Imtiaz > Snappy Internet& Telecom > 7266 SW 48 Street > Miami, Fl 33155 > Tel: 305 663 5518 x 232 > Helpdesk: 305 663 5518 option 2 Email: supp...@snappydsl.net > > > On 11/9/2011 7:28 PM, Matt wrote: >>> They aren't really designed to work at 5 feet. There has to be a ton of >>> multipath. >> That MIGHT be true. But I have power turned all way down and aligned >> carefully at 40+ foot. Without GPS turned on throughput is as >> expected. So I assume it is not a multipath issue. Either GPS sync >> does not like that close range due to some timing issue or GPS sync >> just works poorly. >> >>> From looking at Ubiquiti forums I am guessing the latter. >> >> Am using Mikrotik to test and not the built in test. >> >> >> -------------------------------------------------------------------------------- >> 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/
