METHOD FOR PERFORMING MEASUREMENT IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS FOR SAME

• US 20170215097A1
• Filed: 08/07/2015
• Published: 07/27/2017
• Est. Priority Date: 08/08/2014
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: PARK, Jonghyun, YI, Yunjung, YOU, Hyangsun
• Granted Patent: US 10,721,640 B2
• Time in Patent Office: Days
• CPC Class Codes: H04B 17/318 Received signal strength
• CPC Class Codes: H04B 7/00 Radio transmission systems, i.e. using radiation field H04B10/00, H04B15/00 take precedence
• CPC Class Codes: H04L 5/0035 Resource allocation in a cooperative multipoint environment
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04L 5/005 of common pilots, i.e. pilots destined for multiple users or terminals
• CPC Class Codes: H04W 24/02 Arrangements for optimising operational condition
• CPC Class Codes: H04W 24/08 Testing, supervising or monitoring using real traffic
• CPC Class Codes: H04W 48/16 Discovering, processing access restriction or access information
• CPC Class Codes: H04W 52/343 taking into account loading or congestion level
• CPC Class Codes: H04W 8/005 Discovery of network devices, e.g. terminals
• CPC Class Codes: H04W 84/045 using private Base Stations, e.g. femto Base Stations, home Node B

Abstract

A method for performing a measurement in a wireless communication system and an apparatus for the same are disclosed. Particularly, a method by which a terminal performs a measurement in a wireless communication system comprises the steps of: receiving, by the terminal, a discovery signal; and measuring, by the terminal, reference signal received power (RSRP) and/or reference signal received quality (RSRQ) on the basis of the discovery signal, wherein the number of antenna ports of a cell-specific reference signal (CRS) cannot be applied to the discovery signal-based measurement.

Claims

1. A method of performing, by a user equipment, measurement in a wireless communication system, the method comprising:

receiving a discovery signal by the user equipment; and

measuring, by the user equipment, a reference signal receive power (RSRP) and/or a reference signal received quality (RSRQ) based on the discovery signal,

wherein a number of antenna ports of a cell-specific reference signal (CRS) is not applied to measurement based on the discovery signal.

2. The method of claim 1, further comprising receiving antenna ports number information of the discovery signal from a base station.

3. The method of claim 2, wherein the antenna ports number information of the discovery signal indicates whether antenna port 1 is used for transmission of the discovery signal.

4. The method of claim 3, wherein the antenna ports number information of the discovery signal indicates not using the antenna port 1, antenna port 0 is used to determine the RSRP and/or the RSRQ.

5. The method of claim 4, wherein if the antenna port 1 is reliably detected, the antenna port 1 as well as the antenna port 0 is used to determine the RSRP and/or the RSRQ.

6. The method of claim 3, wherein when the antenna ports number information of the discovery signal indicates using the antenna port 1, the antenna port 0 and the antenna port 1 are used to determine the RSRP and/or the RSRQ.

7. The method of claim 1, wherein the antenna ports number of the discovery signal is predetermined.

8. The method of claim 1, further comprising receiving, by the user equipment, a first subframe pattern for CRS-based restricted measurement and a cell list having the first subframe pattern applied thereto.

9. The method of claim 8, wherein the measurement based on the discovery signal is performed in a subframe indicated by the first subframe pattern within a discovery signal measurement timing configuration (DMTC) duration monitoring the discovery signal.

10. The method of claim 8, further comprising receiving, by the user equipment, a second subframe pattern for restricted measurement based on the discovery signal within the DMTC duration monitoring the discovery signal and a cell list having the second subframe pattern applied thereto.

11. The method of claim 9, wherein the measurement based on the discovery signal is performed in a subframe indicated by the second subframe within the DMTC duration.

12. The method of claim 10, wherein when a cell belonging to the cell list having the first subframe pattern applied thereto and a cell belonging to the cell list having the second subframe pattern applied thereto are overlapped, only a restricted measurement based on the discovery signal or a restricted measurement based on the CRS is performed for the overlapped cell.

13. The method of claim 10, wherein when a cell belonging to the cell list having the first subframe pattern applied thereto and a cell belonging to the cell list having the second subframe pattern applied thereto are overlapped, the CRS-based restricted measurement is performed for the overlapped cell in a subframe indicated by the first subframe pattern within the DMTC duration.

14. The method of claim 10, wherein when a cell belonging to the cell list having the first subframe pattern applied thereto and a cell belonging to the cell list having the second subframe pattern applied thereto are overlapped, a restricted measurement based on the discovery signal is performed for the overlapped cell in a subframe indicated by the second subframe pattern in the DMTC duration, and the CRS-based restricted measurement is performed in a subframe indicated by the first subframe pattern in a duration other than the DMTC duration.

15. A user equipment for performing measurement in a wireless communication system, the user equipment comprising:

a radio frequency (RF) unit for transmitting and receiving a wireless signal; and

a processor for controlling the user equipment,

wherein the processor is configured to;

receive the discovery signal; and

measure a reference signal receive power (RSRP) and/or a reference signal received quality (RSRQ) based on the discovery signal,

wherein a number of antenna ports of a cell-specific reference signal (CRS) is not applied to measurement based on the discovery signal.