Mobility Management Services
The services offered by mobility management are described in the following:

Registration
After power-on or SIM insertion the mobile station searches for a cell and tries to register on it. Selecting
a network is the sense of the registration procedure.

Normal Location Updating
If the mobile station is not registered by the network or changes a location area a normal location updating
is processed. That means the registration by the network is updated.

Periodic Location Updating
If the network uses periodic location updating this procedure is used by the mobile station to update its
registration by the network in periodic times.

IMSI Attach
If indicated by the network the mobile station updates its registration after initial cell selection althought
the SIM card shows the updated state.

IMSI Detach
If indicated by the network the mobile station de-registers itself during SIM removing or power-off.

TMSI Reallocation
The TMSI Reallocation procedure is used by the network to assign a new or changed temporary subscriber
identity to the mobile station.

Authentication
The authentication procedure is used to calculate and compare the authentication parameter.
Identification
The base station uses the identication procedure to request the various identifications from a mobile
station.

MM-Connection Management
MM handles the various connections from call control, supplementary services and short message
services.

Net Request
The net request procedure requests all available networks and presents it to the man machine interface.