Patent ID: 10980000

Abstract:
It is aimed to provide a mobility management device that can normally provide a UE with a notification of an incoming voice call made when ISR is activated and when a mobile communication device is moving from a location registration area under control of an MME to a location registration area under control of an SGSN. A mobility management device (10) makes an ISR feature operate in collaboration with an SGSN (20). It is assumed that a location registration area (60) managed by the mobility management device (10) exists within a location registration area (50) managed by the SGSN (20), and an incoming voice call is made to a mobile communication device (30) during when the mobile communication device (30) is moving out of the location registration area (60). The mobility management device (10) includes an incoming voice call control unit (11) that, in the above case, sends a response message indicating that the mobile communication device (30) is moving to a switching device (40) and, when an incoming voice call message is sent again from the switching device (40) to a switching device (40) after the lapse of a specified period of time, performs call attempt to the mobile communication device (30).