Method for feeding back channel state information, method for transmitting channel state information reference signal, ue and base station
AssigneeFujitsu Limited
InventorsJian ZHANG, Yi ZHANG, Yi WANG, Hongchao LI, Hua ZHOU
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Abstract
A method for feeding back CSI, a method for transmitting CSI-RS, UE and a base station. The method for feeding back includes: feeding back respectively, by UE, CSI corresponding to the vertical dimension and CSI corresponding to the horizontal dimension. Thereby, overhead for performing feedback of CSI in a 3D MIMNO system, or overhead for transmitting CSI-RS, may be further reduced.
Claims20
UE, configured in an MIMO system using a 2D antenna array comprising a vertical dimension and a horizontal dimension, the UE comprising:
- a feedback unit configured to feed back respectively CSI corresponding to the vertical dimension and CSI corresponding to the horizontal dimension.
A base station, configured in an MIMO system using a 2D antenna array comprising a vertical dimension and a horizontal dimension, the base station comprising:
- a configuring unit configured to configure independently information of the vertical dimension and the horizontal dimension;
- and
- a receiving unit configured to receive CSI corresponding to the vertical dimension and CSI corresponding to the horizontal dimension fed back by UE according to the configured information.
A base station, configured in an MIMO system using a 2D antenna array, the base station comprising:
- a transmitting unit configured to transmit a CSI-RS by using any row of antenna array elements and any column of antenna array elements in the 2D antenna array.
UE, configured in an MIMO system using a 2D antenna array, the UE comprising:
- a receiving unit configured to receive a CSI-RS transmitted by a base station, the CSI-RS being transmitted by the base station by using any row of antenna array elements and any column of antenna array elements in the 2D antenna array.
A communication system, comprising:
- UE, configured to feed back respectively CSI corresponding to the vertical dimension and CSI corresponding to the horizontal dimension;
- a base station, configured to configure independently information of the vertical dimension and the horizontal dimension;
- and receive CSI corresponding to the vertical dimension and CSI corresponding to the horizontal dimension fed back by the UE.
A communication system, comprising:
- a base station, configured to transmit a CSI-RS by using any row of antenna array elements and any column of antenna array elements in the 2D antenna array;
- UE, configured to receive the CSI-RS transmitted by the base station.
Dependencies are inferred from the claim text.