MOBILE COMMUNICATION METHOD, SWITCH, AND SUBSCRIBER INFORMATION SERVER

摘要

In the provided mobile communication method, a process to register the location of a mobile station (UE) includes the following steps: a step (A) in which a switcher (SGSN/MME) sends a subscriber information server (HSS) first information for determining whether or not IMS voice service provision capability is the same for each supported area; and a step (B) wherein, when the subscriber information server (HSS) receives a status inquiry from an application server (AS), the first information is used to determine whether or not the switcher (SGSN/MME) should be queried as to whether or not an IMS voice service can be provided to the area where the mobile station (UE) is.