Combination of sub-6 & mmWave

Hainm · May 31, 2021, 3:00am

Demo: dual connectivity for standalone 5G

Test device is: MediaTek’s M80 modem.

ankgitm · June 30, 2021, 10:40pm

If you read this it’s mentioned NR-DC between different Nodes.
No where mentioned for CA in NR between different Nodes.

Hainm · June 30, 2021, 11:09pm

I know it is NR-DC, not CA.
I just mentioned combination of sub6 & mmWave.
I have searched Huawei 5G feature, still not have inter-fr CA, but 3gpp already declare.

It mean CA between FR1 & FR2 is possible.

ankgitm · June 30, 2021, 11:11pm

Yes but is it possible between 2 nodes.
In my view FR1 and FR2 has to be on same node.

sadanandk2 · June 30, 2021, 11:11pm

There is simple definition.
If FR1 and FR2 belong to same node its CA.
If they belong to different node in DC.
Same aplies to LTE also. Inter site CA is nothing but LTE-DC.
Or EUTRA-RC.

ankgitm · June 30, 2021, 11:12pm

There is feature in LTE CA over X2.

sadanandk2 · June 30, 2021, 11:13pm

Yes that is DC.
Similarly NR DC will work on Xn interface.

ankgitm · June 30, 2021, 11:14pm

Ok so CA = DC good catch here between different nodes.

Any idea for such feature in NR between different node for CA?

sadanandk2 · June 30, 2021, 11:15pm

I don’t think development have reached to that level. Need to check.

ankgitm · June 30, 2021, 11:15pm

But DC between different technology is not CA its only DC.

sadanandk2 · June 30, 2021, 11:16pm

Yes yes
It’s variant ENDC.

eta004 · June 30, 2021, 11:19pm

DC is always different technology resource aggregation and CA is always same technology aggregation be it same site or intersite. Correct?

Nitin · June 30, 2021, 11:20pm

DC can be same technology also. NR NR DC.

eta004 · June 30, 2021, 11:20pm

Oh ok, thanks.

sadanandk2 · June 30, 2021, 11:21pm

Whenever 2 nodes are connected with Non ideal BH. It’s always DC no matter which technology.

ankgitm · June 30, 2021, 11:21pm

Yes for CA it can be between FR1 and FR2 carriers but not still proven possible or not as we have FR1 and FR2 on different nodes.

ran_core_consultant · June 30, 2021, 11:22pm

DC also uses 2 separate antennas and 2 streams are/can-be totally independent (EN-DC, NR-NR DC)
CA is same antenna and streams are dependent on scheduler and resources.

sadanandk2 · June 30, 2021, 11:22pm

There is no relation of antenna in CA.

This is technical definition of DC.

ran_core_consultant · June 30, 2021, 11:23pm

Thanks. Didn’t know DC was based on backhaul.
I thought it was more to do with UEs and separate antenna technology.
I have understanding that DC is superior to CA since it needs more complex UE.
Generally networks don’t have DC and CA is being used since 3G days.

eta004 · June 30, 2021, 11:24pm

By non ideal bh.
What it means exactly for e.g. in ENDC I have same gNB/eNB node and say 10G cap bh?