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Comment by rayiner | Hacker News Reader

5G changes things dramatically. 5G deployment will be heavily focused on small cells. That means you can go to higher frequencies, because you don't care as much about propagation, and you've got much more bandwidth available at higher frequencies. So cell size goes down, users per cell goes down, and bandwidth per cell goes up.

That still ends up being massively cheaper than FTTP. Getting fiber into peoples' houses is an incredibly labor-intensive and high-touch process. I just had fiber installed at my house. It took half a day to run fiber down the main road about 1/3 of a mile to my subdivision. Another half day to run it 200 feet down my residential road. Almost a full day to dig under my driveway into my house. And a solid half day to install the CPE. With small cells, you'd basically only have to do the first step. You could've installed a small cell serving hundreds of people in the time it took to retrofit just my house.

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5G might end up cheaper than FTTP, but I wouldn't get my hopes up on it being massively cheaper.

Higher frequencies will require either line of sight or very short distances to the small cell. The small cells themselves will incur costs both CAPEX and OPEX.

Basically the only part 5G will replace in a FTTP network is the drop. And that's where the density and the topography is cooperating. Whereas if you install a fiber drop, you'll be set for 20+ years and you won't have to install, maintain and power a small cell forever.

You’re not just getting rid of the drop, but also the last 100 meters or so through the subdivision. Moreover, the drop and CPE install is 30-40% of the cost of deployment.

Also, fiber is not fire and forget. Just the other day a tree took out the cable to my house. Buried cable has less maintenance, but also much higher initial costs, increasing the cost advantage of wireless for the last 200m.

Like I wrote in the grandparent, it's a density thing. How many subscribers have line of sight (or close enough) for the 5G small cell to work? At some point it's going to be more cost effective to do FTTP.

The CPE cost is negligible. You can pick one up for $20. True, the drop will cost you, but it has a far longer lifespan than the small cell. It's not like the small cell, it's installation, permits, engineering, pole rental or tower, power, etc. are free either.

Like I stated earlier, 5G may be cheaper than FTTP. Or it may not. It may not even be available in your area due to insufficient density. Even if 5G is cheaper, it's not going to be massively more cheaper.

Sorry, how is this any different to LTE on 3.4GHz or 2.6GHz? There is literally nothing different between 4G and 5G on this. 4G deployment on 3.4 or 2.6 could equally be said to be focussed on small cell, but we also have massive worldwide deployments on 450, 600, 700 and 800MHz. So is LTE also about long range?

US 5G deployment will leverage spectrum above 24 GHz where it is feasible: https://arstechnica.com/information-technology/2015/10/5g-mo.... The FCC is working on auctions of 100+ MHz channels in these bands: http://www.telecompetitor.com/fcc-proposes-schedule-for-28-g.... AT&T already spent more than a billion dollars buying up that spectrum. It’s starting 5G trials at 15 GHz: http://www.lightreading.com/mobile/5g/atandt-5g-trials-to-st...

In the US, almost all LTE deployment is below 2 GHz.

24GHz will require line of sight. I can't see how this is going to work for anything more than cell backhaul or fixed wireless access in very rural areas (without trees)?

At relatively short distances (hundreds of meters), enough radio waves bounce around in the environment to still make it to the receiever. https://spectrum.ieee.org/telecom/wireless/smart-antennas-co.... You need beam forming antennas to take advantage of this fact.

See: http://about.att.com/innovationblog/two_years_of_5g_tria

> Learned mmWave signals can penetrate materials such as significant foliage, glass and even walls better than initially anticipated.

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