BASE STATION CONTROLLER, BASE STATION AND COMMUNICATION METHOD

• US 20100056145A1
• Filed: 08/05/2009
• Published: 03/04/2010
• Est. Priority Date: 08/26/2008
• Status: Active Grant

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: Motohashi, Kayo, Miyazaki, Nao, Hashimoto, Masanori, Tezuka, Yasuo
• Granted Patent: US 9,020,506 B2
• Time in Patent Office: Days
• US Class Current: 455/435.200
• CPC Class Codes: H04W 36/10 Reselecting an access point controller
• CPC Class Codes: H04W 88/12 Access point controller devices

Abstract

A base station controller that manages a plurality of cells includes a receiving part configured to receive, from another base station controller that manages a cell sharing a communication area with each of the plurality of cells, identification information of a cell group to which a cell formed by a base station of connection destination candidate of a mobile station connected to a base station under control of the another base station controller belongs, and a control part configured to exercise control to transmit a message requesting connection to the mobile station to each base station forming the cells contained in the cell group.

Claims

1. A base station controller that manages a plurality of cells, the base station controller comprising:

a receiving part configured to receive, from another base station controller that manages a cell sharing a communication area with each of the plurality of cells, identification information of a mobile station connected to a base station under control of the another base station controller, and identification information of a cell group to which a cell, among the plurality of cells, formed by a base station as a connection destination candidate of the mobile station belongs; and

a control part configured to determine, based on the identification information of the mobile station, a cell, among the plurality of cells, belonging to the cell group determined by the cell group identification information and formed by a base station permitting connection to the mobile station, and to exercise control to allow transmission of a message, requesting connection to the mobile station, to the base station forming the determined cell.

2. The base station controller according to claim 1, wherein, if no cell formed by the base station permitting connection to the mobile station among the plurality of cells belonging to the cell group determined by the identification information of the cell group is determined, the control part exercises control not to allow transmission, to the base station forming any cell belonging to the cell group, of a message requesting connection to the mobile station.

3. The base station controller according to claim 1, wherein when a message notifying the control part of permission to connect to the mobile station is received from the determined base station forming the cell, the control part exercises control to allow transmission of the message to the another base station controller by including an identifier of the cell in the message.

4. The base station controller according to claim 1, wherein the control part has a correspondence table associating, with each other, identification information of the mobile station, identification information of the cell formed by the base station permitting connection to the mobile station, and identification information of the cell group in which the cell formed by the base station permitting the connection is contained, and determines the cell based on the correspondence table.

5. A base station controller that manages a plurality of cells, the base station controller comprising:

a receiving part configured to receive, from another base station controller that manages a cell sharing a communication area with each of the plurality of cells, identification information of a cell group to which a cell formed by a base station of connection destination candidate of a mobile station connected to a base station under control of the another base station controller belongs; and

a control part configured to exercise control to transmit a message requesting connection to the mobile station to each base station forming the cells contained in the cell group.

6. The base station controller according to claim 5, wherein when a message notifying the control part of permission to connect to the mobile station is received from one of the cells contained in the cell group, the control part exercises control to allow transmission of the message to the another base station controller by including identification information of the cell in the message.

7. The base station controller according to claim 5, wherein the control part has a correspondence table associating identification information of the cell group with identification information of the cell contained in the cell group, and exercises control to transmit a message, requesting connection to the mobile station connected to the base station forming the cell under the another base station controller, to the base station forming each cell contained in the cell group based on the correspondence table.

8. A base station that forms one of a plurality of cells managed by a base station controller, the base station comprising:

a receiving part configured to receive, from the base station controller, identification information of a mobile station connected to a base station under control of an another base station controller that manages a cell sharing a communication area with each of the plurality of cells; and

a control part configured to determine the mobile station to which a local station permits connection based on the identification information of the mobile station, and to exercise control to transmit a message of notification that connection to the determined mobile station is permitted to the another base station controller via the base station controller.

9. The base station according to claim 8, wherein when a mobile station not permitted to connect to the local station is determined based on the identification information of the mobile station, the control part exercises control to transmit a message of notification that connection to the mobile station is not permitted to the base station controller.