Patent ID: 9402234
Filing Date: 2016-07-26
CPC Classification: H04W,Y02D

Claim Text:
1. A mobile station for a mobile communication system which supports a procedure for the mobile station connected to a first communication system which comprises a first network node, to use a second communication system which comprises a second network node, the mobile station comprising: a receiver configured to receive a paging message from a base station connected to the first network node, the first network node having received a request message from the second network node, the second network node having received a voice call and responded to receipt of the voice call by sending the request message to the first network node; and a transmitter configured to transmit, to the second network node, a message which responds to the paging message, wherein the mobile station requests a unified location registration for the procedure with only the first communication system from among the first communication system and the second communication system, wherein the mobile station establishes a connection with the second network node, wherein the first communication system operates a first radio technology and the second communication system operates a second radio technology different from the first radio technology.