Wireless Oom

The U-RNTI is assigned by the SRNC and uniquely identifies the UE within the UTRAN.
It is used when a UE cannot be identified in the UTRAN, e.g.,
first access after a UE did cell change (cell update or URA update) or for UTRAN originated paging.
U-RNTI: RNC id + S-RNTI
32 bits