Commonly used 5G carrier aggregation (CA)

1

Can someone let me know the commonly used 5G carrier aggregations? Is it only 2-band aggregation that is currently used or are 3-bands, 4-bands, and 5-bands also used? Within 2-bands what are the most commonly used bands for aggregation?

Thanks.

2

NSA N78-n78 2cc or n1-n78
Sa - n78-n78-n38
Sa - n78-n78-n1

3

Thank you.

Please let me know why do you write n78 twice? Is it to convey that you have CA in DL (or UL) and not in the other direction?

4

It is 5G Carrier aggregation, you have 2 carriers in N78. Ex 100mhz plus 60 mhz
in UL, UEs generally support only 1 UL cc, in DL todays use is 3CC in the markets.

Operators generally have 1 Tdd layer , n41 or n78
and refarmed legacy Lte layer like 2100 Fdd in 5G.
Therefore most used Ca combo is n1 + n78 I can definitely say.