I will share the exact case:
UE is on LTE B2 (1900 Band) and NR is n5 (850 Band).
-UE makes new RRC connection on LTE
-UE gets b1 thresh in RrcReconfig to add NR leg and b1 thresh is pretty relaxed.
-UE starts downloading the data right away after making LTE RRC
-But There is no eventb1 triggered by UE right after receiving b1 from eNB. Even though NR coverage/quality is very good and way under b1 thresh
-UE shares b1 measurements very late randomly after 10 seconds or 20s and sometimes after 40-45 seconds.
-Since its new LTE RRC conn so no penalty timer running also there is no data thresh.
-One strange scenario is, in RRC conn mode when UE does LTE HO while NR leg is also present. It sends b1 MR right after latching to target LTE cell.
-So what could the issue that UE is taking too long to send b1 MR after new LTE RRC conn? (Vendor:Ericsson)