LTE PDCCH: What is fallback DCI in NR?

Question

N numbers of UEs can be scheduled at a particular TTI. So How does an UE get to know its own DCI ?

Answer 1

Hi,

Fallback DCI format used to support MCS table of LTE in NR. NR supports 256QAM MCS table and lte doesn't support 256QAM MCS table. So If UE receives normal DCI format then it parse MCS according to the 256QAM mcs table, and If UE receives fallback DCI format then it parse the MCS according to LTE standard.

Comments

Hi Jagannathan, would you please like to explain, where the concept of fallback DCI for NR is described!