Patent ID: 8428600
Filing Date: 2013-04-23
Classification: H04W

Abstract:
1. A mobile communication method in a mobile communication system including a plurality of radio access technologies, the mobile communication method comprising the steps of: notifying, from a mobile station to an access node in a first radio access technology of a target for connection, a desired call type for communication and a radio access capability of the mobile station; determining, at the access node in the first radio access technology, whether or not a radio access technology of a target for the connection of the mobile station is to be switched from the first radio access technology to a second radio access technology, on the basis of the notified desired call type for the communication and the notified radio access capability of the mobile station; making, at the access node in the first radio access technology, an instruction to the mobile station, when determining that the radio access technology of the target for the connection of the mobile station is to be switched from the first radio access technology to the second radio access technology, the instruction instructing the mobile station to switch to the second radio access technology in response to the notifying; and transmitting, from the mobile station to an access node in the second radio access technology, a connection request signal, in accordance with the instruction from the access node in the first radio access technology, wherein the access node in a first radio access technology is configured not to transmit, to a mobile exchange station, an initial signal for setting up the connection, when it is determined that the radio access technology of the target for the connection of the mobile station is to be switched from the first radio access technology to the second radio access technology.