When we get ACK or NACK to inform transmitter, how much is the Latency?

[Ryan]

@Nitin

Yes. Fallback one is predefined. The other ones are user defined.

Do you mean for dci 1_1 we define the table? And others like user defined?
Not getting you when you said fallback predefined and user defined…

@Nitin

But that fixed pdcch might be sending some fixed dci with a fixed format?

Yes.