nanog mailing list archives
Re: New minimum speed for US broadband connections
From: "Forrest Christian (List Account)" <lists () packetflux com>
Date: Thu, 3 Jun 2021 06:40:03 -0600
I think you're really out of touch with what is going on in the WISP space. See the following product as an example: https://www.cambiumnetworks.com/products/pmp-450/5-ghz-pmp-450m-fixed-wireless-access-point/ 14x14 beam-steering Massive Multi-User MIMO. This is able to talk, in the same channel, at the same time, to up to 7 endpoints using both vertical and horizontal polarities at the same time. Total throughput per 40Mhz channel: 1.2Gb/s per AP. Because of the TDMA synchronization, you can actually hang two of these on the same tower front to back using the same channel. So 2.4Gb/s per Frequency. And there are dozens of channels available at this point. Many WISPs are also using LTE hardware. In fact, most gear that WISPs use anymore has little resemblance to the "hang a Wifi radio on a tower" past of the WISP industry. They're all TDMA synchronization (since there is little possibility for a FDMA scheme in half-duplex channels), not CSMA like traditional wifi. They're all moving to various advanced modulations including multiple streams, spatial diversity, and a lot of other high-sophistication modulations to squeeze every bit out of the available bandwidth. Note that by pointing this out I'm not arguing for a "WISP everywhere" model. Many WISPs operate a hybrid model, deploying FTTH where it makes economical sense to do so, and using WISP technology where it doesn't. It's not uncommon to find areas where it's 'miles per home passed' instead of 'homes passed per mile'. In these environments, it is not uncommon to see situations where the money spent deploying the fiber will never be paid back, even if 100% of the customer revenue is deployed strictly to pay for the fiber. On Thu, Jun 3, 2021 at 2:50 AM Baldur Norddahl <baldur.norddahl () gmail com> wrote:
On Thu, Jun 3, 2021 at 12:47 AM Seth Mattinen <sethm () rollernet us> wrote:UBNT's AirMax line is not "wifi". Their LTU line isn't either. Mike and Josh are actual WISP operators. You've stated you have no WISP experience. Listen to them.Neither will listen to me when it comes to FTTH so nah :-) Seriously, it appears to me that both are speaking from a legacy point of view. The equipment deployed does neither use the new frequencies available now, nor OFDMA which is a game changer. If nothing changes, 5G will beat their pants off hands down. Regards, Baldur
-- - Forrest
Current thread:
- Re: New minimum speed for US broadband connections, (continued)
- Re: New minimum speed for US broadband connections Josh Luthman (Jun 02)
- Re: New minimum speed for US broadband connections Baldur Norddahl (Jun 02)
- Re: New minimum speed for US broadband connections Josh Luthman (Jun 02)
- Re: New minimum speed for US broadband connections Baldur Norddahl (Jun 02)
- Re: New minimum speed for US broadband connections Mike Hammett (Jun 02)
- Re: New minimum speed for US broadband connections Baldur Norddahl (Jun 02)
- Re: New minimum speed for US broadband connections Mike Hammett (Jun 02)
- Re: New minimum speed for US broadband connections Josh Luthman (Jun 02)
- Re: New minimum speed for US broadband connections Seth Mattinen (Jun 02)
- Re: New minimum speed for US broadband connections Baldur Norddahl (Jun 03)
- Re: New minimum speed for US broadband connections Forrest Christian (List Account) (Jun 03)
- Re: New minimum speed for US broadband connections Baldur Norddahl (Jun 03)
- Re: New minimum speed for US broadband connections Forrest Christian (List Account) (Jun 03)
- Re: New minimum speed for US broadband connections Mike Hammett (Jun 03)
- Re: New minimum speed for US broadband connections Baldur Norddahl (Jun 03)
- Re: New minimum speed for US broadband connections Forrest Christian (List Account) (Jun 03)
- Re: New minimum speed for US broadband connections Mike Hammett (Jun 04)
- Re: New minimum speed for US broadband connections Baldur Norddahl (Jun 04)
- Re: New minimum speed for US broadband connections Josh Luthman (Jun 04)
- Re: New minimum speed for US broadband connections Mike Hammett (Jun 03)
- Re: New minimum speed for US broadband connections Josh Luthman (Jun 03)