Patent ID: 8270418

Claim:
A method of controlling access to services of an IP Multimedia Subsystem by a user equipment based upon an access point used to access the IP Multimedia Subsystem, the method comprising: upon joining of the user equipment with the access point, storing a Media Access Control (MAC) address of the access point in a Connectivity Session Location and Repository Function (CLF); subsequently, in response to the user equipment requesting access to a service of the IP Multimedia Subsystem, providing information by the CLF identifying the access point to the IP Multimedia Subsystem, the identifying information comprising the MAC address of the access point used to access the IP Multimedia Subsystem; within the IP Multimedia Subsystem, comparing the provided identification information with authorization information stored in a database, the authorization information comprising information identifying prohibited or allowed access points; and dependent upon the result of the comparison, allowing or denying access to the IP Multimedia Subsystem services.