Patent ID: 8699454
Filing Date: 2014-04-15
Classification: H04W

Abstract:
1. A mobile communication method comprising the steps of: (A) transferring, from a first radio base station to a second radio base station, the downlink data which are among the downlink data received from an upper level node and whose transmission to a mobile station is not completed yet, when the first radio base station determines that the mobile station is to perform a handover from a cell controlled by the first radio base station to a cell controlled by the second radio base station; and (B) performing, at the second radio base station, sequence control between downlink data received from the upper level node and the downlink data received from the first radio base station by use of transfer completion notification data, when receiving the transfer completion notification data, wherein in the step (A), when a receiving intermediate storage at the first radio base station has become empty and when receiving no downlink data from the upper level node for a predetermined period of time, the first radio base station transmits the transfer completion notification data to the second radio base station, and wherein the transfer completion notification data contains no downlink data.