Function
A mechanisms for cell and PLMN
selection;
A mechanism for the network to
know the Routeing Area for MSs in STANDBY, PMM‑IDLE, READY, and PMM‑CONNECTED
states;
A mechanism for the 2G‑SGSN to
know the cell identity for MSs in READY state;
A mechanism for the UTRAN to know
the URA identity or cell identity for MSs in PMM‑CONNECTED state;
A mechanism for the UTRAN to
indicate to an MS in RRC Connected mode when a Routeing Area Update procedure
shall be performed by providing the RAI;
A mechanism for the network to
know the address of the serving RNC handling an MS in PMM‑CONNECTED state. This
mechanism is the serving RNC relocation procedure