Patent ID: 8953561
Filing Date: 2015-02-10
Classification: H04M,H04W

Abstract:
1. A mobile communication method of switching a path for a voice communication data signal between a first mobile station and a second mobile station from a path via a first radio access network not supporting a circuit switch communication to a path via a second access network supporting a circuit switch communication, the mobile communication method comprising the steps of: causing a predetermined server for the second radio access network to transmit a path switching signal and activate a timer; causing the second mobile station to switch a transmission destination of the voice communication data signal addressed to the first mobile station from a gateway apparatus connected with the first radio access network to the predetermined server based on the path switching signal; causing the predetermined server to transmit a path restoration instruction signal instructing return from the path via a second access network to the path via a first radio access network to the second mobile station if not detecting that handover of the first mobile station from the first radio access network to the second radio access network is completed before the timer expires; and causing the second mobile station to switch the transmission destination of the voice communication data signal addressed to the first mobile station from the predetermined server to the gateway apparatus in response to the path restoration instruction signal.