Patent ID: 8295830
Filing Date: 2012-10-23
Classification: H04L,H04W

Abstract:
1. A mobile communication terminal, comprising: a registration module configured to initiate a registration of the mobile communication terminal with Internet protocol (IP) multimedia subsystems (IMS) within a home network when the mobile communication terminal is roaming in a visited network; a session module configured to initiate a session set-up with the IMS to enable use of IMS resources, wherein at least one of the registration module and the session module is configured to provide a first IP address to the IMS during at least one of the registration and the session set-up, and wherein the mobile communication terminal is configured to communicate with a first packet data network (PDN) that is local to the visited network using the first IP address in order to use at least one of the IMS resources; a connection module configured to initiate connectivity with each of the home network and the visited network prior to the registration; a reception module configured to receive the first IP address based on the connectivity with the visited network, wherein the reception module is further configured to receive a second IP address from the IMS, wherein the second IP address differs from the first IP address, wherein the reception module is configured to receive the second IP address prior to receiving the first IP address; and an analysis module configured to select the first IP address.