The identifier may be, for example, a paging area identifier, a registration area identifier, or a network exchange identifier.

The information may be e.g. a location area identity, cell identity or switching centre area identity which is used in the public land mobile network.

The geographic area identifier is determined by comparison with a user inputted geographic area identifier.

A notification system for the emergency area identifier is also disclosed in the present invention.

A PDSN zone ID may be utilized in lieu of the full IP address.

Upon receipt of the request, one service area identifier is selected from a plurality of possible service area identifiers.

In accordance with the method a service area identifier is requested that associates with a mobile station.

In a second embodiment, a sinle timer, which is reset after reaching T1, is employed in a similar location update-method.

The telecommunications system comprises a plurality of service areas, each of the service areas being identified by a service area identifier.

The first location area (A) and each first cell (a) are assigned a first location area identifier (LAI-A) and a first code (200).

A method, device and system for updating routing area identifier are provided by the embodiments of the present invention.

The origin of an emergency voice call can be determined based on a location area identifier that corresponds to a geographical area encompassing a geographical location being represented by the location data.

The first length is the length of the second section, which is a service area ID of a group of network nodes.

When the transmitted television signals are received at a tuner (18), the transmitted identifiers are compared with a user inputted geographic area identifier.