How many RNTIs UE has to monitor to decode PDCCH in a slot?

Specs & Protocol Testing
1

Hello Experts.

How many RNTIs UE has to monitor to decode PDCCH in a slot at a time?

2

If UE is expecting SI then SI- RNTI (for SIB decoding), if paging then P-RNTI, if waiting for Random Access then RA-RNTI.

Other experts may comment

3

That’s fine.

But for how many different RNTIs UE has to do blind decoding in a slot?

4

UE will decode all RNTI’s one by one.

Check Nitin Tayal’s blog:

He has explained how UE decode DCI and RNTI.

2 Likes
5

CRNTI as well for UE specific search space

6

The type of RNTI UE has to decode varies depending on the situation (mostly RRC status). Of course, modem stack force UE to decode every RNTI but it would be too much overhead.

The minimum number (types) of RNTI UE had to decode is specified in 3gpp :
http://www.sharetechnote.com/html/5G/5G_RNTI.html
http://www.sharetechnote.com/html/Handbook_LTE_RNTI.html