Hello Experts,
When is 6G coming?
Where this G will end up?
Analogy proven even no always successful, odd failed.
2G, 4G now it’s 6G
1G, 3G, 5G… will it last long?
Changes happen very fast indeed.
Sometimes so fast that you don’t know what to read about first.
Yes human brain having limitations as well.
But what I am surprised, how come nobody invented laser transmission between sites up to now?
It’s huge capacity, cheap (think about all those pointing laser lanterns that reach 20-30 km and cost few dollars one).
Is laser modulation so difficult?
If you do this you won’t need IAB feature between 5G sites…
Small, low cost LEO satellite also being planned for 5G sites.
Oneweb is an example.
Few other compainies also waiting for lite their satellites.
But how they will be dealing with UE power shortage in uplink?
Battery won’t last 20 minute with satellite communication.
Especially for heavy uplods of data.
It’s for backhaul, 20 Gbps per beam per site.
Not bad at all.
For example, 10-15 sites in a dense urban where fiber not available, then 1 site can have backhaul of say 50-100 Gbps from satellite.
Then rest of the sites can be meshed with this site sharing overall bandwidth.
Or each site also can have seperate beams, based on cost analysis.
I think IAB feature will be cheaper than this satellite solution.
Satellite usually introduces delay of few hundreds of microseconds, right?
For high numerology this will be a problem.
3-4 LEO companies are going to provide in that region, say Asia, country specific coverage also and these satellite keep beaming to these sites, making circular moves continuously.
These are very low cost than 100-200 USD per month or so.
Today appx 5000-6000 USD per month for say 10-50mbps satellite BH… may vary country to country.
Next step, think…
Google, Netflix is hiring space in satellite to put their Edge Computing, caching which keeps refreshed based on usage pattern.
So server on real cloud!
Yea, even on RAN every layer will move to cloud (PDCP/RLC/MAC/PHY).
On site will remain pure RF (high frequency, intermediate frequency and demodulators).
Everything will move to cloud/virtualization.
But RF parameters and optimization will remain for long time.
They will never be able to pull a wire between the UE and the basestation.
That immobile. 
Unless they will soon laser beam each UE?
Just curious to know if operators will be capable of honoring high capacity / low latency requirements in order to integrate these rf frontends to the cloud.
Latin America, Africa, parts of Europe, Russia… imho, cloud is becoming more a hype than 5G itself.
I think they can manage small distributed data centers for this like no more than 100 km distance from each distributed RAN equipment.
But even cloud processing takes time.
And at PHY layer low there is no time for delays even microseconds count.
Especially for beamforming analog and digital.
Has anyone noticed that for some vendors Aggregation level 1 for 5G PDCCH is never used?
Only 2, 4, 8 and 16.
Exactly my point.
As a proof of concept, I see it working.
Lab environment is typically more friendly.
I reached 2 Gbps per user on lab testing everyday. 
Only 2, 4, 8 and 16 that i have seen. Never saw AL1 tested even on iodts.
Thanks, good to know… so I will not expect any.
I think 1 would be too risky for coding purpose… even in best RF conditions.
Maybe that’s why!?
It might be right.
Overhead benefit shouldn’t pay off performance risks.
And just confirmed around: DCI agg level >= 2.
Maybe 1 does exist, but I’m not aware of any comercial testing or deployment.
Others might chime in…
6G Study starts from 3GPP R21 Onwards as per ZTE on 3GPP Timelines.
1 Like