5G is not standalone --it requires 4G!

jobeard

TS Ambassador
Cnet.com has a handle on the rollout timeline of 5G that may shock many.

5G isn't replacing 4G, like how 4G overtook 3G. Instead, 5G is building on 4G LTE, using updated radios and software. "For operators in many parts of the world, LTE is and will be the foundation for the next 10 years at least," the GSMA report said. "LTE speeds are improving, which makes 5G less compelling without new services such as AR/VR."​
Right now, 5G networks in the US are something called "non standalone." "With non standalone mode, [carriers] retain the same 4G core network and simply add 5G radios," Most of the 5G networks in the US today also rely on 4G for uploads and use only 5G connections for downloads. Parts of the US, particularly some rural areas, may not have 5G for years, and there are some devices, like smart locks and other smart home products, that may use 4G for a decade or longer.​
Something called spectrum refarming lets carriers shift older spectrum to new wireless networks, like moving from 3G to 4G. That's essential to free up spectrum for new uses. "The problem with refarming was it could take 10 years, ..."​
Instead of having different roads for buses and cars, DSS (dynamic spectrum sharing) is like having one big highway with separate lanes for buses and cars. A software update can quickly turn the current 4G LTE networks into 5G. DSS will make it easier for carriers to keep some 4G lanes open for 4G smart home products or for people who are slow with moving to 5G.​
Carrier aggregation
That magic results in faster and broader 5G network launches. When 5G carrier aggregation happens, operators can combine millimeter wave (mmWave) for downloads and sub-6Ghz for uploads. Or they can do a combination of sub-6Ghz and sub-6Ghz, or sub-6Ghz plus 4G LTE and so on and so forth.​
[editor's comment] hmm, don't hold your breath on aggregating mmWave with the lower sub-6Ghz! Takes TWO connections and RF propagation differences will be implementaion difficults. IMO, the comment is purely theoretical. [/editor]​

Please see the article for more details
 
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cliffordcooley

TS Redneck
So does this mean there is no big hurry to go 5G. Unless you are just looking to upgrade your phone.

Sounds as if carriers will not have need in dropping 4G. Unless they simply want to be anal about promoting 5G.
 

jobeard

TS Ambassador
So does this mean there is no big hurry to go 5G. Unless you are just looking to upgrade your phone.
Unless you're located near the very few cities with ANY form of 5G (google 5g deployment), I wouldn't even consider 5G issues -- there's just TOO much yet to be seen from the technology.
 

cliffordcooley

TS Redneck
I get that. I was referring to when 5G is a bit more wide spread. There wouldn't be a requirement to upgrade, unless you just wanted too.

Are you thinking 5G may not become wide spread? If that is the case. I may never get the opportunity.
 

jobeard

TS Ambassador
4G will not go away! According to the article, the non-standalone implementation may take several years and for rural communities even decades.
 
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