As i know CRM ID will be same of Msg3 but what is the content in message 3.
Hi,
msg3 content will be 40bits random number or an s-TMSI
CRM will be used to resolve contention between UE's , but on which channel it will be transferred to UE.
How ever ENB will send either BI or RAPID in RAR, then if ENB sends only RAPID then how ue gets BI to apply for rach failure ?