Patent ID: 9185546
Filing Date: 2015-11-10
Classification: H04W

Abstract:
1. A mobile communication method comprising: a step A in which, in location registration processing of a mobile station, a switch of a first communication scheme and a switch of a second communication scheme send location update information to a subscriber information server, wherein the location update information includes an information element the information element being used to determine whether or not all coverage areas covered by the switches have a same capability of providing a telephony service by packet switching; and a step B in which, when a status inquiry request made upon receipt of a terminating-call signal destined for the mobile station is received from an application server, the subscriber information server determines based on the location update information whether or not to make an inquiry at the switch of the first communication scheme or the switch of the second communication scheme about whether or not providing the telephony service by packet switching is possible in an area where the mobile station is located.