Mobile communication system, mobile station, switching station, and location registration method for mobile station

A location management node comprising:

• a controller configured to assign a temporary identifier of a circuit switched (CS) domain for a mobile terminal, the temporary identifier including a network resource identifier (NRI) of the CS domain, the NM identifying the location management node in the CS domain;
• a transmitter configured to send a message including the temporary identifier to the mobile terminal via a second mobility management node;
• and
• a receiver configured to receive a request message for updating a location information of the mobile terminal from the mobile terminal via a first mobility management node upon a change of a mobility management node to the first mobility management node from the second mobility management node, the first mobility management node selecting the location management node, from a plurality of location management nodes serving a current location area of the mobile terminal, based on the temporary identifier including NRI.

A system comprising:

• a controller;
• and
• a memory operatively coupled with the controller, wherein the controller is configured to:
• assign a temporary identifier of a circuit switched (CS) domain for a mobile terminal, the temporary identifier including a network resource identifier (NRI) of the CS domain, the NRI identifying a location management node in the CS domain;
• send a message including the temporary identifier to the mobile terminal via a second mobility management node;
• receive, by a first mobility management node, an attach request message from the mobile terminal upon a change of a mobility management node to the first mobility management node from a second mobility management node, the attach request message including the temporary identifier including the NRI;
• select, by the first mobility management node, the location management node, from a plurality of location management nodes serving a current location area of the mobile terminal, based on the temporary identifier including the NRI;
• and
• receive a request message for updating a location information of the mobile terminal from the first mobility management node.