APPARATUS AND METHOD FOR TRANSMITTING CHANNEL STATE INFORMATION IN A WIRELESS COMMUNICATION SYSTEM
First Claim
1. A method for transmitting channel state information in a wireless communication system, the method comprising the following steps:
- receiving, from a base station, information indicating a linkage between a cell set including a serving cell and a subset including a subframe;
configuring channel state information for the subframe on the serving cell;
receiving, from the base station, channel-state-information-request information indicating the cell set; and
transmitting the channel state information to the base station.
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Abstract
The present description relates to a method and apparatus for transmitting channel state information in a wireless communication system. The method comprises the following steps: receiving, from a base station, information indicating a linkage between a cell set including a serving cell and a subset including a subframe; configuring channel state information for the subframe on the serving cell; receiving, from the base station, channel-state-information-request information indicating the cell set; and transmitting the channel state information to the base station. According to the present invention, channel state information, which varies as time elapses, may be accurately measured, and channel state information of the point in time desired by the base station may be provided.
29 Citations
17 Claims
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1. A method for transmitting channel state information in a wireless communication system, the method comprising the following steps:
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receiving, from a base station, information indicating a linkage between a cell set including a serving cell and a subset including a subframe; configuring channel state information for the subframe on the serving cell; receiving, from the base station, channel-state-information-request information indicating the cell set; and transmitting the channel state information to the base station. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A user equipment (UE) for transmitting channel state information in a wireless communication system, the UE comprising:
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a downlink reception unit which receives, from a base station, information indicating a linkage between a cell set including a serving cell and a subset including a subframe, and channel-state-information-request information indicating the cell set; a channel state information configuration unit which measures a channel state for the subframe on the serving cell, and configures channel state information indicating the measured channel state; and an uplink transmission unit which transmits the channel state information to the base station. - View Dependent Claims (10, 11, 12)
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13. A method for receiving channel state information by a base station in a wireless communication system, the method comprising the steps of:
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transmitting, to a user equipment (UE), information indicating a linkage between a cell set including a serving cell and a subset including a subframe; transmitting, to the UE, channel-state-information-request information indicating the cell set; and receiving the channel state information from the UE. - View Dependent Claims (14, 15)
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16. A base station for receiving channel state information in a wireless communication system, the base station comprising:
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a downlink transmission unit which transmits, to a user equipment (UE), information indicating a linkage between a cell set including a serving cell and a subset including a subframe, and channel-state-information-request information indicating the cell set; a channel-state-information-request generation unit which generates the channel-state-information-request information to be transmitted on a physical downlink control channel (PDCCH); and an uplink reception unit which receives the channel state information from the UE.
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17. A method for periodically transmitting channel state information by a user equipment (UE) in a wireless communication system, the method comprising the steps of:
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determining whether there exists at least one of a change in the report period of channel state information, a subset change, and an almost blank subframe (ABS) pattern change; measuring a channel state for the changed subset if a subset change exists; and transmitting, to a base station, channel state information indicating the measured channel state, based on the changed report period of channel state information if there exists a change in the report period of channel state information, wherein the subset comprises at least one subframe for which the channel state information is to be reported.
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Specification