Radio communication system, radio communication method, radio base station and control station

• US 10,219,165 B2
• Filed: 08/24/2016
• Issued: 02/26/2019
• Est. Priority Date: 03/13/2009
• Status: Active Grant

• Current Assignee: NEC Corporation
• Original Assignee: NEC Corporation
• Inventors: Futaki, Hisashi
• Primary Examiner(s): Sams, Matthew C
• Application Number:
  US15/245,701
• Publication Number:
  US 20160366595A1
• Time in Patent Office: 916 Days
• CPC Class Codes: H04L 43/16 Threshold monitoring
• CPC Class Codes: H04W 16/18 Network planning tools
• CPC Class Codes: H04W 24/02 Arrangements for optimising operational condition
• CPC Class Codes: H04W 36/0061 of neighbour cell information
• CPC Class Codes: H04W 52/40 during macro-diversity or soft handoff
• CPC Class Codes: H04W 72/29 between an access point and the access point controlling device
• CPC Class Codes: H04W 84/18 Self-organising networks, e.g. ad-hoc networks or sensor networks
• CPC Class Codes: H04W 88/08 Access point devices
• CPC Class Codes: H04W 88/12 Access point controller devices
• CPC Class Codes: H04W 92/20 between access points
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

A radio communication system includes a plurality of radio base stations and a control station connected to the radio base stations. One of the radio base stations notifies state control information including information regarding state control to the control station before or after execution of state control in the one radio base station. The control station notifies at least one of management information regarding the radio parameter updated in accordance with the state control and the state control information to the radio base stations connected to the control station, with the exclusion of the one radio base station that notified the state control information.

Claims

1. A radio base station in a radio communication system, comprising:

a processor configured to operate a cell;

an X2 interface connected with another radio base station; and

a transceiver configured to communicate with a radio terminal in the cell;

wherein the processor is further configured to;

control a coverage state of the cell operated by the radio base station; and

transmit, via the X2 interface, control information regarding a change of the coverage state to the another radio base station,

wherein the control information includes;

an advance notice of the change of the coverage state to be changed by the radio base station;

ECGI (E-UTRAN Cell Global Identifier) of the cell; and

an index value indicating the coverage state after the change by the radio base station.

2. The radio base station according to claim 1, wherein the processor is configured to control the coverage state using transmission power control of the radio base station or antenna control thereof.

3. The radio base station according to claim 1, wherein the control information is used to avoid failure regarding a handover.

4. A radio communication system comprising

at least a first radio base station and a second radio base station, wherein

the first radio base station comprises:

a processor configured to operate a cell;

an X2 interface connected with the second radio base station; and

a transceiver configured to communicate with a radio terminal in the cell;

wherein the processor is configured to;

control a coverage state of the cell operated by the first radio base station; and

transmit, via the X2 interface, control information regarding a change of the coverage state to the second radio base station, and

wherein the control information includes;

an advance notice of the change of the coverage state to be changed by the first radio base station;

ECGI (E-UTRAN Cell Global Identifier) of the cell; and

an index value indicating the coverage state after the change by the first radio base station.

5. The radio communication system according to claim 4, wherein the processor is configured to control the coverage state using transmission power control of the first radio base station or antenna control thereof.

6. The radio communication system according to claim 4, wherein the control information is used to avoid failure regarding a handover.

7. A method for a radio station, the method comprising:

operating a cell;

communicating with a radio terminal in the cell;

controlling a coverage state of the cell operated by the radio base station; and

transmitting, via an X2 interface connected between the radio base station and another radio base station, control information regarding a change of the coverage to the another radio base station,

wherein the control information includes;

an advance notice of the change of the coverage to be changed by the radio base station;

ECGI (E-UTRAN Cell Global Identifier) of the cell; and

an index value indicating the coverage state after the change by the radio base station.

8. The method according to claim 7, wherein the radio base station controls the coverage state using transmission power control of the radio base station or antenna control thereof.

9. The method according to claim 7, wherein the control information is used to avoid failure regarding a handover.