Patent ID: 9730074
Date: 2017-08-08
CPC Classifications: H04L,H04W

Claim:
1. A method in a system for providing information about an association between an IP address assigned to a User Equipment (UE) and an Integrated Circuit Card Identifier (ICCID) of a Subscriber Identity Module (SIM) card used in the UE in a first security domain to an entity in a second security domain, the system comprising a Mobility Management Entity (MME), a Home Subscriber Server (HSS), and a Packet Data Network Gateway (PDN-GW), the method comprising: the MME retrieving at least the ICCID of the SIM card used by the UE and optionally an Internet Protocol (IP) address for the UE from the HSS, and sending the ICCID and, when retrieved, the IP address towards the PDN-GW; the HSS receiving a request for the ICCID and optionally for the IP address from the MME, and sending the ICCID and, when requested, the IP address to the MME; and the PDN-GW receiving the ICCID for the SIM card used by UE and optionally the IP address for the UE, and when no IP address is received then the PDN-GW assigning an IP address for the UE, associating the IP address with the ICCID and informing the entity in the second security domain about the association between the IP address assigned to the UE and ICCID of the SIM card used by the UE in the first security domain.