Method and Apparatus for Reporting a Logged Measurement in a Wireless Communication System

• US 20130137379A1
• Filed: 08/11/2011
• Published: 05/30/2013
• Est. Priority Date: 08/12/2010
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Jung, Sung Hoon, Yi, Seung June, Lee, Young Dae, Chun, Sung Duck, Park, Sung Jun
• Granted Patent: US 9,526,014 B2
• Time in Patent Office: Days
• US Class Current: 455/67.11
• CPC Class Codes: H04W 24/00 Supervisory, monitoring or testing arrangements
• CPC Class Codes: H04W 24/10 Scheduling measurement reports ; Arrangements for measurement reports

Abstract

The present invention relates to a method and apparatus for performing a logged measurement in a wireless communication system. A terminal receives a measurement configuration and a terminal selection parameter from a base station. The terminal determines whether or not to apply the measurement configuration based on the terminal selection parameter. If the measurement configuration is determined to be applied, the terminal logs a measurement based on the measurement configuration.

Claims

1. A method for reporting a logged measurement in a wireless communication system, the method comprising:

receiving, by a user equipment, a measurement configuration;

storing, by the user equipment, a logged measurement by logging measurements based on the measurement configuration; and

reporting, by the user equipment, the logged measurement to a base station,

wherein the logged measurement includes one or more log entries, and wherein at least one of items in each log entry is selectively logged.

2. The method of claim 1, wherein each log entry includes at least one of a logging location, a logging time, a serving cell identifier, a serving cell measurement result and a neighboring cell measurement result.

3. The method of claim 2, wherein when the serving cell of the user equipment is changed, the serving cell identifier is included in a corresponding log entry.

4. The method of claim 2, wherein when a specific event occurs, the logging time is included in a corresponding log entry.

5. The method of claim 2, wherein when a distance between a current location and a logging location included in a previous log entry is larger than a threshold value, the current location is included as the logging location in a corresponding log entry.

6. The method of claim 1, wherein the measurements are logged in a Radio Resource Control (RRC) idle mode.

7. The method of claim 6, wherein the measurement configuration is a Minimization of Drive Tests (MDT) configuration for MDT measurement.

8. The method of claim 7, further comprising:

starting a validity timer upon receiving the measurement configuration,

wherein while the validity timer is running, the user equipment is in the RRC idle mode logs the measurements based on the MDT configuration to collect the logged measurement.

9. The method of claim 8, further comprising:

when the validity timer expires, discarding the MDT configuration while keeping the logged measurement.

10. The method of claim 9, further comprising:

entering, by the user equipment, into an RRC connection mode; and

transmitting, by the user equipment, a logging indicator indicating an availability of the logged measurement to the base station.

11. A wireless device configured for reporting a logged measurement in a wireless communication system, the wireless device comprising:

a radio frequency unit configured to transmit and receive a radio signal; and

a processor operably connected to the radio frequency unit and configured to;

receive a measurement configuration;

store a logged measurement by logging measurements based on the measurement configuration; and

report the logged measurement to a base station,

wherein the logged measurement includes one or more log entries, and wherein at least one of items in each log entry is selectively logged.

12. The wireless device of claim 11, wherein each log entry includes at least one of a logging location, a logging time, a serving cell identifier, a serving cell measurement result and a neighboring cell measurement result.

13. The wireless device of claim 12, wherein when the serving cell of the terminal is changed, the serving cell identifier is included in a corresponding log entry.

14. The wireless device of claim 12, wherein when a specific event occurs, the logging time is included in a corresponding log entry.

15. The wireless device of claim 12, wherein when a distance between a current location and a logging location included in a previous log entry is larger than a threshold value, the current location is included as the logging location in a corresponding log entry.