How target enodeb will validate the new incoming user during x2 or s1 handover?

Question

How target enodeb will confirm if the incoming user is a genuine user or not?

Is there any IE exchanged during HO preparation phase? I am expecting that during X2 handover AS SECURITY INFO in UE context is very helpful? Is that or not?

Answer 1

X2 handover request message may carry optional IE "handover restriction list" . IE contains majorly PLMNs information. Using this IE, somehow we can restrict admission of UE at target eNodeB through handover procedure.

Comments

I am expecting that
1. KeNB*: AS security base key generated by the source eNB for the target eNB’s use, i.e. KeNB to be used by the target eNB
2. based on the E-RAB QoS information, the target eNB reserves RRC resources to be used by the UE over the radio link (e.g. DRB ID allocation, etc.), and allocates C-RNTI

so I am expecting that Enodeb validate the UE based on AS security and if any UE is accessing the C-RNTI and DRB-ID of Target Enodeb, because target enodeb may assume that these identities are given to UE by source Enodeb.

correct me if i am wrong