5G/NR - RNTI Home : www.sharetechnote.com
RNTI stands for Radio Network Temporary Identifier. This is exactly same concept as LTE RNTI. So I would suggest you to read LTE RNTI part first and get the general understandings on how this works.
< 38.202 - Table 6.2-1: Downlink "Reception Types" >
< 38.202 - Table 6.2-2: Downlink “Reception Type” Combinations >
q : the number of downlink component carriers configured for the UE
j : the number of cell groups configured for the UE.
j=1 indicates non-DC
j=2 indicates NR-NR
< 38.321 - Table 7.1-1: RNTI values. >