When UE looks for its DCIs how does it differentiate UL one vs DL one?

Specs & Protocol Testing
1

Hi Experts.

When UE looks for its DCIs how does it differentiate UL one vs DL one?

2

Each DCI has different format and message size. If 2 formats have same size, there is aflag to differentiate

3

DCI 1 is for DL.
DCI 0 is for UL.