Frans,
I tend to agree with you. LTE is a pretty awesome standard when you step back and look at just what it can do. However, a few crucial differences between it and 802.11: 1. LTE typically uses an order of magnitude higher or more transmit power. My smartphone can blast out a 2W (!!!) signal on T-Mobile's 2700MHz band. This, obviously, affects SNR substantially. 2. LTE has always been deployed in licensed radio bands meaning that any interference is effectively zero. 3. LTE, while employing OFDM like 802.11, usually uses TDMA rather than CSMA/CA My point in this is that LTE was designed for an ideal environment where same-band interference is low/nonexistent, SNRs are higher, and the tower controls who talks and when. It IS a far more spectrally efficient standard but only when you give it ideal working conditions. At 100mW of output power and dealing with 802.11 and other interference, I'd be interested to see how it fairs. Thank you! -Matthew Hinson Network Operations Supervisor ________________________________ From: The EDUCAUSE Wireless Issues Constituent Group Listserv <WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU> on behalf of Frans Panken <frans.pan...@surfnet.nl> Sent: Friday, August 28, 2015 4:21 AM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: Re: [WIRELESS-LAN] LTE over Wi-Fi spectrum sets up industry-wide fight over interference My observations: the current pre-standard product suite that use the LTE-protocol on the 5Gh band are targeting indoor, not outdoor. All marketing and communications on LTE and 5Ghz band is around mobile operators and their need for spectrum. From a technical perspective, I must admit that LTE is a more efficient protocol than Wi-Fi is. So, in addition to preventing that operators ruin the spectrum at our Wi-Fi facilities we should also knock on the doors of our Wi-Fi vendors and asking them how they integrate LTE-U (or another flavour) in their Wi-Fi product offering for our benefits. Frankly speaking, I do not care whether the radio communication uses Wi-Fi, LTE or what ever protocol as long as it does its job well and efficiently. -Frans Brian Helman schreef op 28/08/15 om 03:42: Mike, I was just about to post the same quote, and I looked down and saw it in your post. How viable is 5GHz in this situation? I mean, we've now rolled out two AC buildings. The signals go through 1 wall fine, but 2 walls or a single outside wall and the signal is non-existent. If they won't be allowed to crank it up to 11, is it useful? What am I missing? -Brian ' ________________________________ From: The EDUCAUSE Wireless Issues Constituent Group Listserv [WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU<mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU>] on behalf of Mike King [m...@mpking.com<mailto:m...@mpking.com>] Sent: Thursday, August 27, 2015 8:08 PM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU<mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU> Subject: Re: [WIRELESS-LAN] LTE over Wi-Fi spectrum sets up industry-wide fight over interference Quote from the article: T-Mobile wrote. Qualcomm said its testing<http://apps.fcc.gov/ecfs/document/view?id=60001104452> shows that Wi-Fi access points often have better throughput when sharing a channel with LTE-U than when sharing a channel with another Wi-Fi access point. Here's my comment: We'll duh. Two AP's on the same channel is something we try to avoid, because "It's Bad®". How about comparing throughput of an AP with no interference (Cause that's what we call two AP's on the same channel), and a AP with LTE-U on the same channel. Mike On Thu, Aug 27, 2015 at 5:49 PM, Coehoorn, Joel <jcoeho...@york.edu<mailto:jcoeho...@york.edu>> wrote: The good news is that LTE-U still has the same power limitations as other unlicensed uses. Telecom companies won't be able to easily provision an LTE-U "tower" every 30 meters within our campus, limiting their ability to cause interference. Instead, I see them mostly using this fill coverage gabs by selling wifi routers with an LTE-U service built-in for rural and other underserved areas. Additionally, I see them using this to try to push their backhaul costs onto other providers. A Verizon could get a Cox to help foot their transit bill by selling their special routers to customers at just below their cost. Consumers would buy these routers because they are cheaper, and suddenly Verizon gets some "free" spectrum in that area and can manage things so the call terminates at the Verizon location nearest the other end of the conversation. The biggest risk on our end is probably having students bringing routers with this ability into their residences, but we can deal with that the same way we've always done... well, almost, depending on how the whole Mariott thing turns out. [http://www.york.edu/Portals/0/Images/Logo/YorkCollegeLogoSmall.jpg] Joel Coehoorn Director of Information Technology 402.363.5603<tel:402.363.5603> jcoeho...@york.edu<mailto:jcoeho...@york.edu> The mission of York College is to transform lives through Christ-centered education and to equip students for lifelong service to God, family, and society On Thu, Aug 27, 2015 at 4:12 PM, Thomas Carter <tcar...@austincollege.edu<mailto:tcar...@austincollege.edu>> wrote: Don’t forget the WiFi SLA discussion – another source of interference outside of our control. Thomas Carter Network and Operations Manager Austin College From: The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU<mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU>] On Behalf Of Philippe Hanset Sent: Thursday, August 27, 2015 2:17 PM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU<mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU> Subject: Re: [WIRELESS-LAN] LTE over Wi-Fi spectrum sets up industry-wide fight over interference We can now combine three threads that we have had over the summer on this list 5 GHz, Containment, and the LTE-U controversy (this thread just started) LTE-U and Jamming…will my Wi-Fi equipment provider enable LTE-U “containment” and as a University/College how can I prevent LTE-U from interfering with my 5GHz deployment. Oh boy… Philippe Philippe Hanset www.eduroam.us<http://www.eduroam.us> On Aug 27, 2015, at 2:55 PM, Hinson, Matthew P <matthew.hin...@vikings.berry.edu<mailto:matthew.hin...@vikings.berry.edu>> wrote: Source: http://arstechnica.com/information-technology/2015/08/verizon-and-t-mobile-join-forces-in-fight-for-wi-fi-airwaves/#p3 It was only a matter of time. Thank you! Matthew Hinson Supervisor, Network Operations ********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/. ********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/. ********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/. ********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/. ********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/. ********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/. ********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/. ********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.
