TLLI
Encyclopedia
The TLLI is used in GSM and GPRS services. It provides the signaling address used for communication between the user equipment and the SGSN (Serving GPRS Support Node).
The TLLI can be classified into three groups:
The TLLI can be classified into three groups:
- Local TLLI: for normal operation between SGSN and user equipment.
- Foreign TLLI: primarily used when crossing a routing area boundary.
- Random TLLI: used for initial access or if the user equipment does not possess any of the above.