if cross carrier scheduling is enabled then primary cell can schedule the secondary ENB, then will UE monitor the PDCCH of secondary cell? if yes Why it is required?
It's not required to monitor pdcch of secondary cell for which scheduling is happening from pcell using cross carrier scheduling.
gNB can intiate RACH procedure for PDCCH order. But If UE is configured with NUL and SUL , then How UE comes to know for which UL carrier it has to initiate PDCCH order.
What is the possibility of cross carrier scheduling in dual connectivity?
In normal case HARQ re- transmission will be 4 in UL, But What should be the ideal value if TTI bundling is enabled?
Pcell will be expecting the HARQ feedback of Scell but UE failed to decode the Scell PDCCH . This case UE doesn't send the CA HARQ and uses different PUCCH format But PCELL will be expecting different format to receive the feedback. How to overcome this issue.