Wireless Oom

UMTS address can be classified
1. CN address
- IMSI
-TMSI
-P-TMSI
2. UTRAN address
- S-RNTI
- U-RNTI
- C-RNTI
3. UE ID dedicated channels

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

S-RNTI is assigned by the SRNC.
It is uniquely identified within the SRNC.
It is 20 bits.
This id is used by UE, SRNC, DRNC.

There are three types of UTRAN addresses:
1. s-RNTI
2. u-RNTI
3. c-RNTI