Method and apparatus for transmitting channel state information in wireless access system supporting machine type communication
AssigneeLG Electronics Inc.
InventorsBonghoe KIM, Joonkui AHN
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Abstract
The present invention provides a method by which an MTC terminal measures channel state information (CSI), a method for transmitting CSI, and apparatuses supporting the same. A method by which the MTC terminal feeds back CSI in a wireless access system supporting machine type communication (MTC), according to one embodiment of the present invention, comprises the steps of: receiving allocation information on a limited MTC bandwidth allocated to the MTC terminal; calculating CSI; and feeding back the CSI. Here, the CSI can include MTC wideband channel state information (MTC W-CQI) for the limited MTC bandwidth.
Claims10
A method for transmitting a channel status information (CSI) report at a machine type communication (MTC) user equipment (UE) in a wireless access system supporting a MTC, the method comprising:
- receiving, from a base station, an uplink grant including a CSI request field triggering an aperiodic CSI report;
- and
- transmitting the aperiodic CSI report including the CSI to the base station through a physical uplink shared channel (PUSCH) according to the CSI request field,
- wherein the CSI includes only a wideband channel quality information (W-CQI) value for a restricted bandwidth allocated for the MTC-UE and does not include subband CQI when the CSI report mode is configured as a mode 2-0 representing a UE selected subband CQI feedback, and
- wherein a size of the restricted bandwidth is 6 resource blocks (RBs) and the W-CQI value is calculated conditioned on rank 1.
A machine type communication (MTC) user equipment (UE) for transmitting channel status information (CSI) report in a wireless access system supporting MTC, the MTC UE comprising:
- a transmitter;
- a receiver;
- and
- a processor configured to control the transmitter and the receiver to support feedback of a CSI,
- wherein the processor is configured to:
- control the receiver to receive, from a base station, an uplink grant including a CSI request field triggering an aperiodic CSI report;
- and
- control the transmitter to transmit to the base station, the aperiodic CSI report including the CSI through a physical uplink shared channel (PUSCH) according to the CSI request field,
- wherein the CSI includes only a wideband channel quality information (W-CQI) value for a restricted bandwidth allocated for the MTC-UE and does not include subband CQI when the CSI report mode is configured as a mode 2-0 representing a UE selected subband CQI feedback, and
- wherein a size of the restricted bandwidth is 6 resource blocks (RBs) and the wideband CQI value is calculated conditioned on rank 1.
Dependencies are inferred from the claim text.