METHOD AND APPARATUS FOR MEASURING INTERFERENCE IN WIRELESS COMMUNICATION SYSTEM

• US 20140286189A1
• Filed: 10/30/2012
• Published: 09/25/2014
• Est. Priority Date: 10/31/2011
• Status: Abandoned Application

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Kang, Ji Won, Chun, Jin Young, Kim, Ki Tae, Kim, Su Nam, Ihm, Bin Chul, Park, Sung Ho
• Application Number:
  US14/355,191
• Publication Number:
  US 20140286189A1
• Time in Patent Office: Days
• US Class Current: 370/252
• CPC Class Codes: H04B 17/345 Interference values signal-to-interference ratio [SIR] or carrier-to-interference ratio [CIR] H04B17/336
• CPC Class Codes: H04B 7/0417 Feedback systems
• CPC Class Codes: H04B 7/063 Parameters other than those covered in groups H04B7/0623 - H04B7/0634, e.g. channel matrix rank or transmit mode selection
• CPC Class Codes: H04B 7/0632 Channel quality parameters, e.g. channel quality indicator [CQI]
• CPC Class Codes: H04B 7/0639 Using selective indices, e.g. of a codebook, e.g. pre-distortion matrix index [PMI] or for beam selection
• CPC Class Codes: H04W 24/06 Testing, supervising or monitoring using simulated traffic
• CPC Class Codes: H04W 24/10 Scheduling measurement reports ; Arrangements for measurement reports
• CPC Class Codes: H04W 52/244 Interferences in heterogeneous networks, e.g. among macro and femto or pico cells or other sector / system interference [OSI]
• CPC Class Codes: H04W 52/283 Power depending on the position of the mobile
• CPC Class Codes: H04W 52/325 Power control of control or pilot channels

Abstract

Provided is a method for measuring interference by a user equipment (UE) in a multi-node system comprising inside a cell a base station and a plurality of nodes that are controlled by the base station, and the user equipment for same. The method comprises: receiving from the base station a cell-specific interference measurement setting message; and measuring the interference in a resource region indicated by the cell-specific interference measurement setting message, wherein the cell-specific interference measurement setting message is characterized by all of the nodes in the cell comprising information for setting a cell-specific interference measurement region for transmitting a zero-power channel state information (CSI) reference signal (RS).

Claims

1. A method of measuring, by User Equipment (UE), interference in a multi-node system comprising a base station and a plurality of nodes controlled by the base station within a cell, the method comprising:

receiving a cell-specific interference measurement region configuration message from the base station, and

measuring interference in a resource region indicated by the cell-specific interference measurement region configuration message,

wherein the cell-specific interference measurement region configuration message comprises information for configuring a cell-specific interference measurement region in which all the nodes within the cell send a zero-power Channel State Information (CSI) Reference Signal (RS).

2. The method of claim 1, wherein the cell-specific interference measurement region configuration message is received through a System Information Block (SIB).

3. The method of claim 1, wherein the zero-power CSI-RS is an RS whose transmission power is set to 0.

4. The method of claim 1, wherein the interference measured in the cell-specific interference measurement region is a resource region in which interference outside the cell that is affected by the UE from the outside of the cell is measured.

5. The method of claim 4, further comprising receiving a UE-specific CSI-RS configuration message, wherein the UE-specific CSI-RS configuration message is information indicative of a resource region of a non-zero-power CSI-RS that needs to be measured by the UE.

6. The method of claim 5, wherein the resource region of the non-zero-power CSI-RS comprises a resource region in which interference inside the cell that is attributable to a node that gives inference to the UE is measured.

7. The method of claim 6, wherein a Channel Quality Indicator (CQI) is computed based on a total amount of interference of a sum of the interference inside the cell and the interference outside the cell, and the computed CQI is fed back to the base station.

8. The method of claim 6, wherein at least one of the interference inside the cell, the interference outside the cell, and a total amount of interference of a sum of the interference inside the cell and the interference outside the cell is fed back to the base station.

9. User Equipment (UE) measuring interference in a multi-node system comprising a base station and a plurality of nodes controlled by the base station within a cell, the UE comprising:

a Radio Frequency (RF) unit sending or receiving radio signals; and

a processor connected to the RF unit,

wherein the processor receives a cell-specific interference measurement region configuration message from the base station and measures interference in a resource region indicated by the cell-specific interference measurement region configuration message, and

the cell-specific interference measurement region configuration message comprises information for configuring a cell-specific interference measurement region in which all the nodes within the cell send a zero-power Channel State Information (CSI) Reference Signal (RS).

10. The UE of claim 9, wherein the cell-specific interference measurement region configuration message is received through a System Information Block (SIB).

11. The UE of claim 9, wherein the interference measured in the cell-specific interference measurement region is a resource region in which interference outside the cell that is affected by the UE from an outside of cell is measured.

12. The UE of claim 11, wherein:

the processor further receives a UE-specific CSI-RS configuration message, and

the UE-specific CSI-RS configuration message is information indicative of a resource region of a non-zero-power CSI-RS that needs to be measured by the UE.

13. The UE of claim 12, wherein the resource region of the non-zero-power CSI-RS comprises a resource region in which interference inside the cell that is attributable to a node that gives inference to the UE is measured.

14. The UE of claim 13, wherein the processor compute a Channel Quality Indicator (CQI) based on a total amount of interference of a sum of the interference inside the cell and the interference outside the cell, and feeds the computed CQI back to the base station.

15. The UE of claim 12, wherein at least one of the interference inside the cell, the interference outside the cell, and a total amount of interference of a sum of the interference inside the cell and the interference outside the cell is fed back to the base station.