The mobile station visiting a location registration area at the present time
plans to move to another location registration area at a future time. The mobile
station sends the moving schedule information to the location management agent
in a prescribed format to notify it of the scheduled destination. Receiving the
moving schedule information, the location management agent learns the location
registration area corresponding to the scheduled destination among the plurality
of location registration areas. The location management agent sets a moving schedule
flag in the location registration database in accordance with the moving schedule
information with that format, which is received from the mobile station, and makes
an additional registration of the moving time and the destination location registration
area. Then, at the future time, it updates the location registration database,
thereby making a new location registration.
