Patent ID: 8218505
Filing Date: 2012-07-10
Classification: H04W

Abstract:
1. A mobile communication method in which a mobile station performs a handover from a handover source cell under control of a handover source radio base station to a handover target cell under control of a handover target radio base station, the mobile communication method comprising the steps of: transmitting, from the handover source radio base station to the handover target radio base station directly or through a switching center, a handover preparation signal including verification information on the handover target cell and a first cell other than the handover target cell under control of the handover target radio base station; performing, at the mobile station, a cell selection when the handover to the handover target cell has failed; transmitting, from the mobile station to the handover target radio base station, a connection re-establishment request to the first cell including the verification information related to the first cell, when the first cell is selected in the cell selection; and verifying, at the handover target radio base station, the validity of the mobile station, by using the verification information related to the first cell transmitted by the handover source radio base station and the verification information related to the first cell transmitted by the mobile station.