Method and apparatus for transmitting channel status information in carrier aggregation system

摘要

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.

主权项

1. A method of transmitting channel status information (CSI) of a user equipment (UE) in a carrier aggregation system, the method comprising:
receiving a higher layer signal comprising a bitmap from a base station (BS); receiving a downlink control information (DCI) format including a CSI request field from the BS, wherein a size of the CSI request field is 1 bit and a size of the bitmap is N bits, N being a natural number larger than 1; generating CSI for a specific downlink component carrier (DL CC), based on the bitmap, among N DL CCs which are configured for the UE when the CSI request field triggers a CSI reporting; and transmitting the generated CSI to the BS, wherein each bit of the bitmap is mapped to a corresponding one of the N DL CCs and indicates a DL CC for which CSI is generated.