METHOD FOR REPORTING THE RESULTS OF SPECIFIC REFERENCE-CELL-BASED QUALITY MEASUREMENT IN A MOBILE COMMUNICATION SYSTEM USING CARRIER AGGREGATION, AND APPARATUS FOR THE METHOD

• US 20120294184A1
• Filed: 01/20/2011
• Published: 11/22/2012
• Est. Priority Date: 01/21/2010
• 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
• Granted Patent: US 8,891,394 B2
• Time in Patent Office: Days
• US Class Current: 370/252
• CPC Class Codes: H04L 5/001 the frequencies being arranged in component carriers
• 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 36/0058 Transmission of hand-off measurement information, e.g. measurement reports
• CPC Class Codes: H04W 36/0085 Hand-off measurements
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 76/15 Setup of multiple wireless link connections
• CPC Class Codes: H04W 88/06 adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals

Abstract

The present invention relates to a method in which a terminal reports the results of quality measurement based on a specific reference cell from among a plurality of serving cells for the terminal in a mobile communication system using carrier aggregation. The present invention also relates to a terminal apparatus for the method. For this purpose, the terminal receives measurement configuration information from a network, performs a quality measurement in accordance with the received measurement configuration information, determines whether or not a report criterion based on a specific reference cell from among the plurality of cells for the terminal is met in accordance with the measurement result, and, if the report criterion based on the specific reference cell is met, sends a report message, including the measurement results and an indicator that indicates the specific reference cell, to the network.

Claims

1. A method for performing, by a user equipment (UE), a quality measurement report on the basis of a specific reference cell in a mobile communication system using a carrier aggregation (CA) scheme, the method comprising:

receiving measurement configuration information from a network;

performing, by the user equipment (UE), quality measurement according to the received measurement configuration information;

determining whether a quality measurement report criterion is satisfied on the basis of a specific reference cell from among a plurality of cells configured in the user equipment (UE) based upon quality measurement result; and

reporting a report message including the quality measurement result and an indicator indicating the specific reference cell to the network if the quality measurement report criterion is satisfied on the basis of the specific reference cell.

2. The method according to claim 1, wherein the user equipment (UE) selects the specific reference cell according to any one scheme predetermined between the user equipment (UE) and the network from among a first scheme for selecting a cell having the highest quality from among a plurality of cells configured in the UE, a second scheme for selecting a cell having the lowest quality from among a plurality of cells configured in the UE, and a third scheme for allowing the UE to randomly select one of a plurality of cells configured in the UE.

3. The method according to claim 1, wherein the received measurement configuration information includes information regarding the scheme for enabling the UE to select the specific reference cell from among the plurality of cells configured in the user equipment (UE).

4. The method according to claim 3, wherein the scheme for selecting the specific reference cell includes at least one of the first scheme for selecting one cell having the highest quality from among the plurality of cells configured in the UE, the second scheme for selecting one cell having the lowest quality from among the plurality of cells configured in the UE, and the third scheme for allowing the UE to randomly select one of a plurality of cells configured in the UE.

5. The method according to claim 1, wherein the received measurement configuration information includes information regarding the quality measurement report criterion,

wherein the quality measurement report criterion includes at least one of

a first criterion (1) in which a quality of a serving cell is better than a threshold value,

a second criterion (2) in which the quality of the serving cell is worse than a threshold value,

a third criterion (3) in which a quality of a neighbor cell is higher than the quality of the serving cell by a measurement offset or higher,

a fourth criterion (4) in which the quality of the serving cell is worse than a first threshold value and the quality of the neighbor cell is better than a second threshold value, and

a fifth criterion (5) in which the quality of the serving cell is worse than the first threshold value and a neighbor cell quality of a heterogeneous network (inter-Radio Access Technology) is better than a second threshold value,

wherein the user equipment (UE) considers the serving cell for use in the first to fifth criteria (1) to (5) to be a specific reference cell so as to determine whether the first to fifth criteria (1) to (5) were satisfied.

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

upon receiving the measurement configuration information, determining whether a plurality of serving cells are configured in the UE,

wherein, if the plurality of serving cells are configured in the user equipment (UE), the quality measurement operation and the operation of determining whether the quality measurement report criterion is satisfied are carried out.

7. A method for performing, by a user equipment (UE), a quality measurement report on the basis of a specific reference cell in a mobile communication system using a carrier aggregation (CA) scheme, the method comprising:

receiving measurement configuration information from a network, wherein the measurement configuration information includes a measurement object, a quality measurement report criterion, a measurement identity for connecting the measurement object to the quality measurement report criterion, and an identifier which indicates a specific reference cell to be used for determining whether the quality measurement report criterion is satisfied from among a plurality of cells configured in the user equipment (UE);

performing, by the user equipment (UE), quality measurement according to the received measurement configuration information;

determining whether a quality measurement report criterion is satisfied on the basis of the specific reference cell based upon quality measurement result; and

reporting a report message including the quality measurement result to the network if the quality measurement report criterion is satisfied on the basis of the specific reference cell.

8. A user equipment (UE) for performing a quality measurement report on the basis of a specific reference cell in a mobile communication system using a carrier aggregation (CA) scheme, the user equipment (UE) comprising:

a reception module configured to receive measurement configuration information from a network; and

a processor configured to control a quality measurement operation in response to the measurement configuration information received through the reception module,

wherein the processor, if a quality measurement report criterion is satisfied on the basis of a specific reference cell from among a plurality of cells configured in the user equipment (UE) upon receiving the quality measurement result, reports a report message including the quality measurement result and an indicator indicating the specific reference cell to the network.

9. The user equipment (UE) according to claim 8, wherein the processor selects the specific reference serving cell according to any one scheme predetermined between the user equipment (UE) and the network from among a first scheme for selecting a cell having the highest quality from among a plurality of cells configured in the UE, a second scheme for selecting a cell having the lowest quality from among a plurality of cells configured in the UE, and a third scheme for allowing the UE to randomly select one of a plurality of cells configured in the UE.

10. The user equipment (UE) according to claim 8, wherein the received measurement configuration information includes information regarding the scheme for enabling the processor to select the specific reference cell from among the plurality of cells configured in the user equipment (UE).

11. The user equipment (UE) according to claim 10, wherein the scheme for selecting the specific reference cell includes at least one of the first scheme for selecting one cell having the highest quality from among the plurality of cells configured in the UE, the second scheme for selecting one cell having the lowest quality from among the plurality of cells configured in the UE, and the third scheme for allowing the UE to randomly select one of a plurality of cells configured in the UE.

12. The user equipment (UE) according to claim 8, wherein the received measurement configuration information includes information regarding the quality measurement report criterion,

wherein the quality measurement report criterion includes at least one of

a first criterion (1) in which a quality of a serving cell is better than a threshold value,

a second criterion (2) in which the quality of the serving cell is worse than a threshold value,

a third criterion (3) in which a quality of a neighbor cell is higher than the quality of the serving cell by a measurement offset or higher,

a fourth criterion (4) in which the quality of the serving cell is worse than a first threshold value and the quality of the neighbor cell is better than a second threshold value, and

a fifth criterion (5) in which the quality of the serving cell is worse than the first threshold value and a neighbor cell quality of a heterogeneous network (inter-Radio Access Technology) is better than a second threshold value,

wherein the user equipment (UE) considers the serving cell for use in the first to fifth criteria (1) to (5) to be a specific reference cell so as to determine whether the first to fifth criteria (1) to (5) were satisfied.

13. A user equipment (UE) for performing a quality measurement report on the basis of a specific reference cell in a mobile communication system using a carrier aggregation (CA) scheme, the user equipment (UE) comprising:

a reception module configured to receive measurement configuration information from a network, wherein the measurement configuration information includes a measurement object, a quality measurement report criterion, a measurement identity for connecting the measurement object to the quality measurement report criterion, and an identifier which indicates a specific reference cell to be used for determining whether the quality measurement report criterion is satisfied from among a plurality of cells configured in the user equipment (UE); and

a processor configured to control a quality measurement operation in response to the measurement configuration information received through the reception module,

wherein the processor, if the quality measurement report criterion is satisfied on the basis of the specific reference cell upon receiving the quality measurement result, reports a report message including the quality measurement result to the network.