| 摘要 |
<p>Methods and apparatuses for ensuring that a first subscriber in an unlicensed mobile access system is prevented from unauthorized use of a second subscriber's identity when the first subscriber requests services from a mobile station to a core network are presented. In a method a mobile station (202) is authenticated before higher-layer messages are sent from the mobile station to a core network (206), a service request from the mobile station is forwarded to the core network, wherein a IMSI for the mobile station is included in the service request, an authentication request is transmitted from the core network to the mobile station and an authentication response is sent in response to the authentication request. Higher-layer messages from the mobile station (202) to the core network (206) are examined to ensure that identifying means associated with mobile station is contained in the higher-layer message.</p> |
