How Inter-Band Handover Works in LTE?

Question

1 ->What are all the Handover failure situations in LTE ( apart from mentioned)

HO failure situations :- Like Target fails to
->get security context (mismatch in integrity/ciphering)
->max number of ue's in connected mode reached
->failed to admit atleast on erab n other

and what the message source eNodeB forwards to UE ( to inform a failure in handover) which leads to reestablishment ?

2->How or what are the possibilities that a UE fails to configure with RRC connection reconfiguration sent n does this happen only during Handover.

Answer 1

If I assume your query is related to inter-frequency handover then please find my answer as follow.
- eNodeB does radio configuration for an LTE UE with the required frequency.
- eNodeB does report configuration for an LTE UE with the configured frequency. I meant to say that when an UE meets configured thresholds then it sends associated events to eNodeB and eNodeB takes necessary actions.

I have not worked for LTE handover as such but based on the specification understanding UE reports A3, A4 or A5 events.