Mobile communication method, mobile station, and radio base station

Abstract

A reconnection procedure is successfully performed even when a connection destination radio base station does not manage “UE Context” for a mobile station UE. A mobile communication method according to the present invention includes a step B in which the mobile station UE transmits CGI of cell # 1 to a radio base station eNB#2 in the reconnection procedure, and a step C in which the radio base station eNB#2 acquires “UE Context” for the mobile station UE from a radio base station eNB#1 managing cell # 1 designated based on the CGI when not managing “UE Context” for the mobile station UE in the reconnection procedure.

1 . A mobile communication method comprising:
 a step A in which when detecting a radio link failure in a first cell under a first radio base station, a mobile station starts a reconnection procedure for a second radio base station managing a second cell selected in a cell selection processing;   a step B in which in the reconnection procedure, the second radio base station transmits ELF report to the first radio base station;   
       and
 a step C in which in the reconnection procedure, when managing context information of the mobile station matching with information contained in the RLF report, the first radio base station performs HO preparation processing and transmits the context information of the mobile station to the second radio base station, 
 
     
     
         2 . The mobile communication method according to  claim 1 , wherein the information contained in the RLF report includes PCI, C-RNTI and short MAC-I therein. 
     
     
         3 . The mobile communication method according to  claim 1 , wherein in the step B, the second radio base station designates the first radio base station using a cell identity transmitted from the mobile station. 
     
     
         4 . The mobile communication method according to  claim 1 , wherein the RLF report and the HO preparation processing are performed through X2 interface.