Method by which terminal reports channel state information in wireless communication system and apparatus therefor
AssigneeLG Electronics Inc.
InventorsHanbyul Seo, Kijun Kim
Life of this patent
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Abstract
A method by which a terminal reports CSI in a wireless communication system, according to an embodiment of the present invention, comprises the steps of: calculating CSI for at least one interference measurement resource selected from among a plurality of interference measurement resources respectively having unique indices in a specific subframe; and reporting the CSI to a base station, wherein the CSI can be reported with a subframe index of the specific subframe and the unique index of the at least one interference measurement resource.
Claims6
A method of reporting channel status information (CSI) by a user equipment in a wireless communication system, the method comprising:
- receiving information on a plurality of interference measurement resources respectively having unique indexes in a specific subframe and information for a report type indicating a type of information to be reported further when reporting the CSI, from a base station;
- calculating the CSI on the plurality of interference measurement resources;
- selecting at least one interference measurement resource for which interference below a predetermined first threshold is calculated from the plurality of interference measurement resources based on the calculated CSI;
- reporting only the CSI calculated for the selected at least one interference measurement resource to the base station based on the information for the report type;
- and
- additionally reporting aggregation information including the unique indexes for interference measurement resources for which interference above a predetermined second threshold higher than the predetermined first threshold is calculated among the plurality of interference measurement resources based on the calculated CSI,
- wherein the CSI is reported together with a subframe index of the specific subframe and a unique index of the selected at least one interference measurement resource when the report type of the CSI is a first report type,
- wherein the CSI is reported together with a bitmap corresponding to the plurality of interference measurement resources when the report type of the CSI is a second report type, and
- wherein the bitmap is configured such that a bit value of a position corresponding to the selected at least one interference measurement resource is configured to 1.
A user equipment configured to report channel status information (CSI) in a wireless communication system, the user equipment comprising:
- a transceiver;
- and
- a processor,
- wherein the processor is configured to:
- control the transceiver to receive information on a plurality of interference measurement resources respectively having unique indexes in a specific subframe and information for a report type indicating a type of information to be reported further when reporting the CSI, from a base station,
- calculate the CSI on the plurality of interference measurement resources,
- select at least one interference measurement resource for which interference below a predetermined first threshold is calculated from the plurality of interference measurement resources based on the calculated CSI,
- report only the CSI calculated for the selected at least one interference measurement resource to the base station based on the information for the report type, and
- additionally report aggregation information including the unique indexes for interference measurement resources for which interference above a predetermined second threshold higher than the predetermined first threshold is calculated among the plurality of interference measurement resources based on the calculated CSI
- wherein the CSI is reported together with a subframe index of the specific subframe and a unique index of the selected at least one interference measurement resource when the report type of the CSI is a first report type,
- wherein the CSI is reported together with a bitmap corresponding to the plurality of interference measurement resources when the report type of the CSI is a second report type, and
- wherein the bitmap is configured such that a bit value of a position corresponding to the selected at least one interference measurement resource is configured to 1.
Dependencies are inferred from the claim text.