Power-efficient channel quality measuring method in a mobile communication system in which carrier aggregation is employed, and a device for the same

• US 9,462,483 B2
• Filed: 01/06/2011
• Issued: 10/04/2016
• Est. Priority Date: 01/07/2010
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Jung, Sung Hoon, Chun, Sung Duck, Yi, Seung June, Lee, Young Dae, Park, Sung Jun
• Primary Examiner(s): Vu, Huy D
• Assistant Examiner(s): Duffy, James P
• Application Number:
  US13/521,031
• Publication Number:
  US 20130128754A1
• Time in Patent Office: 2,098 Days
• US Class Current: 1/1
• CPC Class Codes: H04W 24/00 Supervisory, monitoring or testing arrangements
• CPC Class Codes: H04W 24/10 Scheduling measurement reports ; Arrangements for measurement reports
• CPC Class Codes: H04W 52/02 Power saving arrangements in wired systems H04L12/12; signaling of mobile application services, e.g. low battery notifications H04W4/20
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

The present invention relates to a method in which a terminal carries out channel quality measurement in a power-efficient fashion in a mobile communication system in which carrier aggregation is employed. If the terminal supports measurement based on serving cell quality, then an additional judgment is made as to whether the terminal is configured for simultaneous communication with a plurality of serving cells and, if the terminal does support measurement based on serving cell quality and is configured for simultaneous communication with a plurality of serving cells, then a decision is made as to whether the quality-representing value for the plurality of serving cells is at or above a threshold value and, if the quality-representing value for the plurality of serving cells is at or above the threshold value, then a quality measurement is carried out within a limited range taking into account the plurality of serving cells.

Claims

1. A method of performing measurement at a user equipment (UE) in a wireless communication system, the method comprising:

receiving measurement configuration information including a plurality of measurement objects and a s-measure value related to a neighbor cell measurement;

measuring activated serving cells indicated by the plurality of measurement objects to obtain a plurality of measurement results, the activated serving cells including a s-measure associated serving cell and at least one s-measure non-associated serving cell;

comparing the s-measure value only with a first measured value from the plurality of measurement results, the first measured value being related to the s-measure associated serving cell;

when the first measured value is lower than the s-measure value, measuring the s-measure associated serving cell and the at least one s-measure non-associated serving cell;

comparing a measurement of the at least one s-measure non-associated serving cell from with a threshold for a reporting event configured in the UE; and

transmitting a measurement report of the at least one s-measure non-associated serving cell when the measurement of the at least one s-measure non-associated serving cell satisfies the threshold for the reporting event,

wherein the s-measure value is dedicated to the UE and received via radio resource control (RRC) signaling.

2. The method of claim 1, wherein the measurement configuration information further includes measurement gaps required to perform inter-frequency measurement without uplink or downlink schedule.

3. The method of claim 1, wherein the measuring the s-measure associated serving cell and the at least one s-measure non-associated serving cell comprises:

performing an intra-frequency neighboring cell measurement for a frequency corresponding to any of the activated serving cells; and

performing an inter-frequency neighboring cell measurement for a second frequency excluding the frequency corresponding to any of the activated serving cells.

4. The method of claim 1, wherein a number of the s-measure value configured in the UE does not match with a number of the activated serving cells measured by the UE.

5. The method of claim 1, further comprising:

receiving a plurality of weight values from the network; and

obtaining a linear combination value indicating a reference quality of the activated serving cells by applying to plurality of weight values to a plurality of measured values of the measurement of activated serving cells,

wherein a total sum of the plurality of weight is equals to ‘

1’

.

6. The method of claim 1, further comprising:

when the first measured value is greater than the s-measure value,

only measuring the s-measure associated serving cell;

comparing the measurement of the s-measure associated serving cell with the threshold for the reporting event configured in the UE; and

transmitting a measurement report when the measurement of the s-measure associated serving cell satisfies the threshold for the reporting event.

7. A user equipment (UE) comprising:

a transmitter;

a receiver; and

a processor configured to;

receive measurement configuration information including a plurality of measurement objects and a s-measure value related to a neighbor cell measurement;

measure activated serving cells indicated by the plurality of measurement objects to obtain a plurality of measurement results, the activated serving cells including a s-measure associated serving cell and at least one s-measure non-associated serving cell;

compare the s-measure value only with a first measured value from the plurality of measurement results, the first measured value being related to the s-measure associated serving cell;

when the first measured value is lower than the s-measure value, measure the s-measure associated serving cell and the at least one s-measure non-associated serving cell;

compare a measurement of the at least one s-measure non-associated serving cell from with a threshold for a reporting event configured in the UE; and

transmit a measurement report of the at least one s-measure non-associated serving cell when the measurement of the at least one s-measure non-associated serving cell satisfies the threshold for the reporting event,

wherein the s-measure value is dedicated to the UE and received via radio resource control (RRC) signaling.

8. The UE of claim 7, wherein the measurement configuration information further includes measurement gaps required to perform inter-frequency measurement without uplink or downlink schedule.

9. The UE of claim 7, wherein the processor performs an intra-frequency neighboring cell measurement for a frequency corresponding to any of the activated serving cells and performs an inter-frequency neighboring cell measurement for a second frequency excluding the frequency corresponding to any of the activated serving cells.

10. The UE of claim 7, wherein a number of the s-measure value configured in the UE does not match with a number of the activated serving cells measured by the UE.

11. The UE of claim 7,

wherein the processor is further configured to:

receives receive a plurality of weight values from the network, and

obtain a linear combination value indicating a reference quality of the activated serving cells by applying to plurality of weight values to a plurality of measured values of the measurement of the activated serving cells, and wherein a total sum of the plurality of weight is equals to ‘

1’

.

12. The UE of claim 7, wherein, when the first measured value is greater than the s-measure value, the processor is configured to:

only measure the s-measure associated serving cell;

compare the measurement of the s-measure associated serving cell with the threshold for the reporting event configured in the UE; and

transmit a measurement report when the measurement of the s-measure associated serving cell satisfies the threshold for the reporting event.