Patent ID: 9198102
Filing Date: 2015-11-24
Classification: H04W

Abstract:
1. A mobile communication method, comprising the steps of: in a state where a first radio base station forwards downlink user data addressed to a mobile station, which is received from a gateway apparatus, to a second radio base station and the second radio base station transmits the downlink user data addressed to the mobile station to the mobile station, determining, by the second radio base station, to perform handover processing for the mobile station from a cell under the second radio base station to a cell under a third radio base station; transmitting, by the second radio base station, a handover request signal to the third radio base station, the handover request signal notifying that forwarding of the downlink user data addressed to the mobile station from the first radio base station to the second radio base station is ongoing; transmitting, by the third radio base station, a forwarding request signal for the downlink user data addressed to the mobile station, to the first radio base station; in response to the forwarding request signal, switching, by the first radio base station, a forwarding destination of the downlink user data addressed to the mobile station, which is received from the gateway apparatus, from the second radio base station to the third radio base station; and transmitting, by the third radio base station, the downlink user data addressed to the mobile station, which is received from the first radio base station, to the mobile station.