METHOD AND APPARATUS FOR PERFORMING MEASUREMENT IN WIRELESS COMMUNICATION SYSTEM

• US 20150043369A1
• Filed: 03/18/2013
• Published: 02/12/2015
• Est. Priority Date: 03/18/2012
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Kim, Eunsun, Yoon, Sukhyon, Seo, Hanbyul, Kim, Byounghoon, Kim, Kijun
• Granted Patent: US 9,661,516 B2
• Time in Patent Office: Days
• US Class Current: 370/252
• CPC Class Codes: H04J 11/005 of intercell interference
• CPC Class Codes: H04W 24/08 Testing, supervising or monitoring using real traffic
• CPC Class Codes: H04W 52/34 TPC management, i.e. sharing limited amount of power among users or channels or data types, e.g. cell loading

Abstract

A method and apparatus for performing measurement are disclosed. The method for performing radio link monitoring by a user equipment (UE) in a wireless communication system includes: performing cancellation of a reference signal (RS) of a neighbor cell; and determining whether to declare a radio link failure (RLF) on the basis of a reference signal (RS) of a serving cell by using information of a predetermined power ratio related to the neighbor cell.

Claims

1. A method for performing radio link monitoring by a user equipment (UE) in a wireless communication system, the method comprising:

performing cancellation of a reference signal (RS) of a neighbor cell; and

determining whether to declare a radio link failure (RLF) on the basis of a reference signal (RS) of a serving cell by using information of a predetermined power ratio related to the neighbor cell.

2. The method according to claim 1, wherein the predetermined power ratio information is the ratio of a transmission power of a physical downlink control channel (PDCCH) of the neighbor cell to a transmission power of a cell-specific reference signal.

3. The method according to claim 1, further comprising:

receiving a ratio of a transmission power of a physical downlink control channel (PDCCH) of the neighbor cell to a transmission power of a cell-specific reference signal from the serving cell.

4. The method according to claim 2, wherein:

the ratio of a transmission power of PDCCH of the neighbor cell to a transmission power of cell-specific reference signal is transmitted to the UE through higher layer signaling.

5. The method according to claim 1, wherein the neighbor cell is a cell used as an interference source when the UE receives a signal from the serving cell.

6. A method for receiving system information by a user equipment (UE) in a wireless communication system, the method comprising:

performing cancellation of a physical broadcast channel (PBCH) signal of a neighbor cell; and

receiving system information through a PBCH of a serving cellby using information of a predetermined power ratio related to the neighbor cell.

7. The method according to claim 6, wherein the predetermined power ratio information is the ratio of a transmission power of a physical broadcast channel (PBCH) of the neighbor cell to a transmission power of a cell-specific reference signal.

8. The method according to claim 6, wherein the UE performs channel estimation when receiving the PBCH of the serving cell using the predetermined power ratio information.

9. The method according to claim 6, wherein the serving cell and the neighbor cell are identical in terms of at least one of a radio frame and a subframe boundary.

10. The method according to claim 6, wherein:

if the UE receives the ratio of a transmission power of a physical downlink control channel (PDCCH) of the neighbor cell to a transmission power of a cell-specific reference signal (RS), the ratio of the PDCCH transmission power to cell-specific RS transmission power is used for channel estimation during PBCH reception of the serving cell.

11. The method according to claim 6, wherein:

the ratio of a transmission power of PDCCH of the neighbor cell to a transmission power of cell-specific reference signal is transmitted to the UE through higher layer signaling.

12. The method according to claim 6, wherein the neighbor cell is a cell used as an interference source when the UE receives a signal from the serving cell.

13. A user equipment (UE) apparatus for use in a wireless communication system comprising:

a reception (Rx) module; and

a processor,

wherein the processor performs cancellation of a reference signal (RS) of a neighbor cell, and determines whether to declare a radio link failure (RLF) on the basis of a reference signal (RS) of a serving cell by using information of a predetermined power ratio related to the neighbor cell.

14. A user equipment (UE) apparatus for use in a wireless communication system comprising:

a reception (Rx) module; and

a processor,

wherein the processor performs cancellation of a physical broadcast channel (PBCH) signal of a neighbor cell, and receives system information through a PBCH of a serving cell by using information of a predetermined power ratio related to the neighbor cell.