Mobile communication method and radio base station

• US 8,380,201 B2
• Filed: 10/14/2010
• Issued: 02/19/2013
• Est. Priority Date: 10/14/2009
• Status: Active Grant

• Current Assignee: NTT Docomo Incorporated (Nippon Telegraph and Telephone Corporation)
• Original Assignee: NTT Docomo Incorporated (Nippon Telegraph and Telephone Corporation)
• Inventors: Takahashi, Hideaki, Hapsari, Wuri Andarmawanti, Iwamura, Mikio, Ishii, Minami, Okamoto, Takeshi
• Primary Examiner(s): MITCHELL, NATHAN A
• Application Number:
  US13/502,000
• Publication Number:
  US 20120258768A1
• Time in Patent Office: 859 Days
• Field of Search: 455436-444, 370331-334
• US Class Current: 455/436
• CPC Class Codes: H04W 36/0033 with transfer of context information
• CPC Class Codes: H04W 36/00835 Determination of neighbour cell lists
• CPC Class Codes: H04W 36/08 Reselecting an access point
• CPC Class Codes: H04W 76/10 Connection setup
• CPC Class Codes: H04W 84/045 using private Base Stations, e.g. femto Base Stations, home Node B
• CPC Class Codes: H04W 88/08 Access point devices
• CPC Class Codes: H04W 92/20 between access points

Abstract

A radio base station managing a handover source cell decides a method for achieving a handover in consideration of CSG-ID and Access Mode of a handover destination cell. A mobile communication method comprises: a step of notifying, by a radio base station HeNB#1, a radio base station HeNB#2 of CSG-ID and Access Mode of cell subordinate to a radio base station HeNB#1, when establishing an X2 connection with the radio base stations HeNB#2; the radio base station HeNB#2 managing the CSG-ID and the Access Mode of the cell subordinate to the radio base station HeNB#1; a step of deciding the method for performing the handover of the mobile station UE from the cell subordinate to the radio base station HeNB#2 to the cell subordinate to the radio base station HeNB#1 on the basis of the managed CSG-ID and Access Mode of the cell subordinate to the radio base station HeNB#1.

Claims

1. A mobile communication method, comprising a step of deciding, by a second radio base station, a method for performing a handover of a mobile station from a cell subordinate to the second radio base station to a cell subordinate to a first radio base station, wherein

in the step, the second radio base station considers an X2 handover as the method for performing the handover, when registered-group identification information of the cell subordinate to the first radio base station is the same as registered-group identification information of the cell subordinate to the second radio base station and when an access mode of the cell subordinate to the first radio base station is not “

Open”

.

2. A mobile communication method, comprising a step of deciding, by a second radio base station, a method for performing a handover of a mobile station from a cell subordinate to the second radio base station to a cell subordinate to a first radio base station, wherein

in the step, the second radio base station considers an S1 handover as the method for performing the handover, when registered-group identification information of the cell subordinate to the first radio base station is different from registered-group identification information of the cell subordinate to the second radio base station and when an access mode of the cell subordinate to the first radio base station is not “

Open”

.

3. A radio base station, comprising a handover processing unit configured to decide a method for achieving a handover of a mobile station from a cell subordinate to a radio base station to a cell subordinate to a neighboring radio base station, wherein

the handover processing unit is configured to consider an X2 handover as the method for performing the handover, when registered-group identification information of the cell subordinate to the neighboring radio base station is the same as registered-group identification information of the cell subordinate to the radio base station and when an access mode of the cell subordinate to the first radio base station is not “

Open”

.

4. A radio base station, comprising a handover processing unit configured to decide a method for achieving a handover of a mobile station from a cell subordinate to a radio base station to a cell subordinate to a neighboring radio base station, wherein

the handover processing unit is configured to consider an S1 handover as the method for performing the handover, when registered-group identification information of the cell subordinate to the neighboring radio base station is different from registered-group identification information of the cell subordinate to the radio base station and when an access mode of the cell subordinate to the first radio base station is not “

Open”

.