[gascan]

Couple things- the range of 5G is pretty limited. Getting a cell down the block from your house would seem to be nearly as hard as running a line to your door. Also, with wireless, never forget about bandwidth. Bandwidth is the reason living next to thirty other WiFi networks tanks your speeds (but not your cat5 speeds!)

[rayiner]

> Getting a cell down the block from your house would seem to be nearly as hard as running a line to your door

A 5G cell will be 0.1-1.0 km in radius and cover dozens to hundreds of users. In a suburban area, that might be an entire large subdivision. The cost of getting fiber to the cell might be just as much as getting it to a fiber distribution hub in the subdivision, but with 5G once you do that you're done. With FTTH, you have to then run it to each house, which will take (in the aggregate) way longer than it took to run fiber to the subdivision. The branch factor kills you--yeah, it's just a couple of hundred feet to each house, but it's a very labor-intensive couple of hundred feet (under yards, into basements) that you have to do for each subscriber.

Also, all bandwidth is shared--it's just a question of where the sharing starts. GPON--what's typically used for FTTH--involves sharing 2.4 gigabit down/1.2 gigabit up between 16-32 users per PON. That comfortably supports gigabit service with reasonable oversubscription. A 5G small cell will have less bandwidth shared between more users, but will be in the same ballpark.

[zaphod12]

that's incorrect. contention is the reason being next to all of those other wifi networks tanks your speed. Only 1 device can transmit on a given channel at a time. It's as if everyone is plugged into the same handful of ethernet cables.

[gascan]

Ok, maybe I used the wrong word, but I meant the bandwidth of the air. As you say, only 1 device can transmit at a time.