Gemalto Sa

Thales Dis France Sa

Julien Baudouin

Jean-Yves Fine

The invention relates to a method for accessing an Internet protocol Multimedia Subsystem type subsystem, said subsystem. According to the invention, a device is firstly connected to a mobile communication network, as a visited network, said first network. The method comprises the following steps. The first network sends to the device a first message comprising current location data relating to a location where the device is currently present. The device analyzes whether at least one roaming rule associated with the current location data is or is not stored within the device. The at least one roaming rule includes, each, at least one parameter for accessing the subsystem. And if the device does store the at least one roaming rule associated with the current location data, then the device sends to the subsystem a second message including a request for connecting to the subsystem. The invention also pertains to a corresponding device.

Method and device for accessing an internet protocol multimedia subsystem type subsystem

The invention relates, in particular, to a method for registering at least one public address in an IMS network including a terminal that interacts with a security element. According to the invention, the security element includes an application that invites the user of the terminal, upon the occurrence of an event, to enter a public address, selected by the user, via the man/machine interface of the terminal, the application transmitting the public address, accompanied by at least one identifier of the security element, to a remote network via the terminal such that the remote network associates the public address with the identifier.

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Gemenos, France

Julien Baudouin