APPARATUS AND METHOD OF REPORTING LOGGED MEASUREMENT IN WIRELESS COMMUNICATION SYSTEM

• US 20110195668A1
• Filed: 02/08/2011
• Published: 08/11/2011
• Est. Priority Date: 02/09/2010
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Park, Sung Jun, Lee, Sung Min, Yi, Seung June, Jung, Sung Hoon, Chun, Sung Duck
• Granted Patent: US 8,787,834 B2
• Time in Patent Office: Days
• US Class Current: 455/67.11
• CPC Class Codes: H04W 24/08 Testing, supervising or monitoring using real traffic
• CPC Class Codes: H04W 24/10 Scheduling measurement reports ; Arrangements for measurement reports
• CPC Class Codes: H04W 76/27 Transitions between radio resource control [RRC] states

Abstract

A method and apparatus of reporting logged measurements in a wireless communication system is provided. A user equipment in a Radio Resource Control (RRC) connected mode receives Minimization of Drive Tests (MDT) configuration from a base station and starts a validity timer upon receiving the MDT configuration. The user equipment in an RRC idle mode logs measurements based on the MDT configuration to collect logged measurements while the validity timer is running. When the validity timer is expired, the user equipment discards the MDT configuration.

Claims

1. A method of reporting logged measurements of a user equipment in a wireless communication system, the method comprising:

receiving, by a user equipment in a Radio Resource Control (RRC) connected mode from a base station, a Minimization of Drive Tests (MDT) configuration;

upon receiving the MDT configuration, starting a validity timer;

logging, by the user equipment in an RRC idle mode, measurements based on the MDT configuration to collect logged measurements while the validity timer is running; and

when the validity timer is expired, discarding the MDT configuration.

2. The method of claim 1, wherein the MDT configuration includes a timer value for the validity timer.

3. The method of claim 2, wherein the MDT configuration includes a logging interval indicating periodicity for storing measurement results.

4. The method of claim 1, further comprising:

stopping to log the measurements and keeping the logged measurements when the validity timer is expired.

5. The method of claim 1, further comprising:

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

6. The method of claim 5, wherein the logging indicator is transmitted by the user equipment in the RRC connected mode.

7. The method of claim 1, further comprising:

receiving, by the user equipment from the base station, an information request to request the logged measurements; and

transmitting, by the user equipment to the base station, an information response to send the logged measurements.

8. The method of claim 7, wherein the logged measurements includes measurement results of at least one serving cell and time information.

9. An apparatus of reporting logged measurements in a wireless communication system, the apparatus comprising:

a radio frequency unit for transmitting and receiving radio signals; and

a processor operatively coupled with the radio frequency unit and configured for;

receiving, from a base station, a Minimization of Drive Tests (MDT) configuration;

upon receiving the MDT configuration, starting a validity timer;

logging measurements based on the MDT configuration to collect logged measurements while the validity timer is running; and

when the validity timer is expired, discarding the MDT configuration.

10. The apparatus of claim 9, wherein the MDT configuration includes a timer value for the validity timer.

11. The apparatus of claim 10, wherein the MDT configuration includes a logging interval indicating periodicity for storing measurement results.

12. The apparatus of claim 9, wherein the processor is configured for:

stopping to log the measurements and keeping the logged measurements when the validity timer is expired.

13. The apparatus of claim 9, wherein the processor is configured for:

transmitting, to the base station, a logging indicator indicating an availability of the logged measurements.

14. The apparatus of claim 13, wherein the processor is configured for:

receiving, from the base station, an information request to request the logged measurements; and

transmitting, to the base station, an information response to send the logged measurements.

15. The apparatus of claim 14, wherein the logged measurements includes measurement results of at least one serving cell and time information.