How RRC Inactive to RRC Idle transition happen in NR SA?

[S_K]

@pradeep

RRC inactive mode is more or less same as idle mode with the exception that UE will store the RRC context for some time.

Yes, this I know.

@pradeep

After some timer expiry, UE will just delete that context and move to RRC idle mode.

Which timer? There is no timer given to UE in SuspendConfig except T380, which is used for periodic RNA update.

3GPP has given below statement.
In response to a request to resume the RRC connection, the network may resume the suspended RRC connection and send UE to RRC_CONNECTED, or reject the request to resume and send UE to RRC_INACTIVE (with a wait timer), or directly re-suspend the RRC connection and send UE to RRC_INACTIVE, or directly release the RRC connection and send UE to RRC_IDLE, or instruct the UE to initiate NAS level recovery (in this case the network sends an RRC setup message).