Method for authenticating mobile units attached to a femtocell in communication with a secure core network such as an ims

The invention claims a relates to a millimicro microcellular method of Internet protocol multimedia subsystem (IMS) communication network. In one embodiment, millimicro to microcellular code division multiple access (CDMA) on standard. The method comprises: The first safety entity in IMS network, from the millimicro microcellular and mobile device using millimicro microcellular the first authentication information of the first power of any of the integral condition searching playing. The farther method comprising: A safety entity and at least one based on integral condition of safenet inquired form's safety key and a inquires mobile device and authentication method without. In one embodiment, the second safety entity based on a CDMA authentication server. The farther method comprising: In response to the second authentication communication authentication mobile device, microcellular claims a button to the millimicro.