Mobile communication method and mobile station

摘要

In a mobile communication method of the invention, when communication of a mobile station (UE) in a “RRC_Connected state” in a cell (#1) under the control of a radio base station (eNB#1) is performed through an EPS bearer formed of a U-plane bearer between the mobile station (UE) and the radio base station (eNB#1) and an S1-U bearer between the radio base station (eNB#1) and a gateway device (S-GW), and if the radio base station (eNB#1) detects that a cell (#10) is located around the mobile station (UE), the radio base station (eNB#1) sends the mobile station (UE) “RRC Connection Reconfiguration” which contains information correlating identification information on the EPS bearer with identification information on the cell (#10).

主权项

1. A mobile communication method comprising:
a step A of, when communication of a mobile station in a connected state in a first cell under control of a first radio base station is performed through an evolved packet system (EPS) bearer, wherein the EPS bearer is formed of a Data radio bearer between the mobile station and the first radio base station and an S1-U bearer between the first radio base station and a gateway device, and when a second cell under control of a second radio base station is located in a coverage of the first cell and the first radio base station detects that the second cell is located around the mobile station from a result of a radio measurement on the mobile station, causing the first radio base station to send the mobile station a setting change signal containing information correlating identification information on the EPS bearer with identification information on the second cell; a step B of causing the mobile station to set a Data radio bearer between the mobile station and the second radio base station in response to the setting change signal; and a step C of changing the EPS bearer, wherein the EPS bearer is formed of the Data radio bearer between the mobile station and the second radio base station, an S1-U bearer between the second radio base station and the first radio base station, and the S1-U bearer between the first radio base station and the gateway device.