Method and apparatus for transmitting channel status information in carrier aggregation system
AssigneeLG Electronics Inc.
InventorsDong Youn Seo, Min Gyu Kim, Suck Chel Yang, Joon Kui Ahn
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Abstract
Provided are a method and apparatus for transmitting channel status information (CSI) of a user equipment (UE) in a carrier aggregation system. The method includes: receiving an uplink grant including a CSI request field from a base station (BS); and transmitting aperiodic CSI for a first serving cell, a first serving cell set or a second serving cell set according to a bit value of the CSI request field to the BS via the first serving cell.
Claims15
A method of transmitting channel status information (CSI) of a user equipment (UE) in a carrier aggregation system, the method comprising:
- receiving an uplink grant including a CSI request field from a base station (BS);
- generating CSI for a specific serving cell according to a bit value of the CSI request field;
- and
- transmitting the generated CSI to the BS via a first serving cell,
- wherein if the CSI request field consists of 1 bit and the bit value of the CSI request field is ‘1’, aperiodic CSI for the first serving cell is transmitted, and
- wherein, in a case where the CSI request field consists of 2 bits and is decoded in a UE-specific search space, the aperiodic CSI for the first serving cell is transmitted if the bit value of the CSI request field is ‘01’, aperiodic CSI for a first serving cell set configured in a higher layer is transmitted if the bit value of the CSI request field is ‘10’, and aperiodic CSI for a second serving cell set configured in the higher layer is transmitted if the bit value of the CSI request field is ‘11’.
A user equipment (UE) comprising:
- a radio frequency (RF) unit for transmitting and receiving a radio signal;
- and
- a processor coupled to the RF unit,
- wherein the processor receives an uplink grant including a channel status information (CSI) request field, generates CSI for a specific serving cell according to a bit value of the CSI request field, and transmits transmitting the generated CSI via a first serving cell,
- wherein if the CSI request field consists of 1 bit and the bit value of the CSI request field is ‘1’, aperiodic CSI for the first serving cell is transmitted, and
- wherein, in a case where the CSI request field consists of 2 bits and is decoded in a UE-specific search space, the aperiodic CSI for the first serving cell is transmitted if the bit value of the CSI request field is ‘01’, aperiodic CSI for a first serving cell set configured in a higher layer is transmitted if the bit value of the CSI request field is ‘10’, and aperiodic CSI for a second serving cell set configured in the higher layer is transmitted if the bit value of the CSI request field is ‘11’.
Dependencies are inferred from the claim text.