Network Node, Terminal Device and Methods Therein for Data Transmission using Beamforming
AssigneeTelefonaktiebolaget LM Ericsson (publ)
InventorsQi Zhang, Wei Zhou, Chunhui Liu
Life of this patent
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Abstract
The present disclosure provides a method (200) in a network node. The method (200) includes: selecting (210) a number, N, of beams for data transmission to a terminal device, where N is an integer larger than one; transmitting (220) to the terminal device Channel State Information-Reference Signal, CSI-RS, having N ports using the N beams; receiving (230) from the terminal device a first measurement report containing a Rank Indicator, RI, obtained by the terminal device measuring the CSI-RS; and transmitting (240) data to the terminal device based on the RI using the N beams.
Claims21
1-28. (canceled)
A method in a network node, comprising:
- selecting a number, N, of beams for data transmission to a terminal device, where N is an integer larger than one;
- transmitting to the terminal device a channel state information reference signal (CSI-RS) having N ports, using the N beams;
- receiving from the terminal device a first measurement report containing a rank indicator (RI) obtained by the terminal device measuring the CSI-RS;
- and
- transmitting data to the terminal device based on the RI using the N beams.
A method in a terminal device, comprising:
- receiving a channel state information reference signal (CSI-RS) having a number, N, of ports transmitted from a network node using N beams, where N is an integer larger than one;
- transmitting to the network node a first measurement report containing a rank indicator (RI) obtained by measuring the CSI-RS;
- and
- receiving data transmitted from the network node based on the RI using the N beams.
A terminal device, comprising a transceiver, a processor and a memory, the memory comprising instructions executable by the processor whereby the terminal device is operative to:
- receive a channel state information reference signal (CSI-RS) having a number, N, of ports transmitted from a network node using N beams, where N is an integer larger than one;
- transmit to the network node a first measurement report containing a rank indicator (RI) obtained by measuring the CSI-RS;
- and
- receive data transmitted from the terminal device based on the RI using the N beams.
Dependencies are inferred from the claim text.