ANTI-INTERFERENCE APPARATUS AND METHOD IN WIRELESS COMMUNICATION SYSTEM

• US 20110070881A1
• Filed: 05/21/2009
• Published: 03/24/2011
• Est. Priority Date: 05/21/2008
• Status: Active Grant

• Current Assignee: Nokia Technologies Oy (Nokia Corporation)
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Yun, Sang-Boh, Hwang, Sung-Soo, Lee, Joo-Hyun
• Granted Patent: US 8,838,107 B2
• Time in Patent Office: Days
• US Class Current: 455/423
• CPC Class Codes: H04W 24/10 Scheduling measurement reports ; Arrangements for measurement reports
• CPC Class Codes: H04W 28/04 Error control
• CPC Class Codes: H04W 52/0206 in access points, e.g. base stations access point devices per se H04W88/08
• CPC Class Codes: H04W 84/045 using private Base Stations, e.g. femto Base Stations, home Node B
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

The present invention relates to an apparatus and method for reducing the interference caused by a femtocell in a wireless communication system. The method comprises the steps of: measuring the intensity of a signal received from a terminal when the transmission mode is deactivated; and controlling the transmission mode to be activated according to the signal intensity, and thus has the advantage of decreasing the influence effects caused by the femtocell and reducing the power consumption in a femto base station.

Claims

1. A method for controlling a transmit mode in a femto base station of a wireless communication system, the method comprising:

when the transmission mode is deactivated, measuring the intensity of a signal received from a terminal; and

controlling the transmission mode to be activated considering the signal intensity.

2. The method of claim 1, wherein the controlling of the transmission mode to be activated comprises:

comparing the measured signal intensity with a reference value; and

if the signal intensity is greater than the reference value, controlling the transmission mode to be activated.

3. The method of claim 2, wherein the controlling of the transmission mode to be activated comprises increasing a transmit power gradually and converting the transmit power into an ON state.

4. The method of claim 2, further comprising:

if the signal intensity is less than or is equal to the reference value, maintaining the deactivation state of the transmission mode.

5. The method of claim 1, further comprising:

if a handover completion signal for a terminal having provided a service is received in a state where the transmission mode is activated, identifying if a terminal providing a service exists; and

if a terminal providing a service no longer exists, controlling the transmission mode to be deactivated.

6. The method of claim 1, further comprising:

if a call connection with a terminal providing a service is released in a state where the transmission mode is activated, identifying if a terminal providing a service exists; and

if a terminal providing a service no longer exists, controlling the transmission mode to be deactivated.

7. The method of claim 5, wherein the controlling of the transmission mode to be deactivated comprises decreasing a transmit power gradually and converting the transmit power into an OFF state.

8. An apparatus for controlling a transmission mode in a femto base station of a wireless communication system, the apparatus comprising:

a receiving unit for receiving a signal;

a signal intensity measurement unit for measuring the intensity of a signal received through the receiving unit; and

a transmission mode controller for, when the transmission mode is deactivated, controlling the transmission mode to be activated considering the signal intensity measured in the signal intensity measurement unit.

9. The apparatus of claim 8, wherein, when the transmission mode is deactivated, in case that the signal intensity is greater than a reference value, the transmission mode controller controls the transmission mode to be activated and, when the transmission mode is deactivated, in case that the signal intensity is less than or is equal to the reference value, the transmission mode controller controls to maintain the deactivation state of the transmission mode.

10. The apparatus of claim 9, wherein, when controlling the transmission mode to be activated, the transmission mode controller increases a transmit power gradually and converts the transmit power into an ON state.

11. The apparatus of claim 8, further comprising a transmitting unit activated or deactivated according to the control of the transmission mode controller.

12. The apparatus of claim 8, wherein, in a state where the transmission mode is activated, when a terminal providing a service no longer exists, the transmission mode controller controls the transmission mode to be deactivated.

13. The apparatus of claim 12, wherein, when controlling the transmission mode to be deactivated, the transmission mode controller decreases a transmit power gradually and converts the transmit power into an OFF state.

14. The apparatus of claim 12, wherein, when a handover completion signal for a terminal having provided a service is received, the transmission mode controller identifies if a terminal providing a service exists.

15. The apparatus of claim 12, wherein, when a call connection with a terminal having provided a service is released, the transmission mode controller identifies if a terminal providing a service exists.