US 2019/0097710 A1 · METHOD FOR TRANSMITTING A UPLINK SIGNAL BASED ON A CODEBOOK IN A WIRELESS COMMUNICATION SYSTEM AND APPARATUS THEREFOR

Abstract

This specification provides a method of transmitting an uplink signal based on a codebook in a wireless communication system. More specifically, the method performed by a UE includes receiving, from a base station, downlink control information (DCI) including a first transmit precoding matrix indicator (TPMI), determining a codebook subset related to the transmission of the uplink signal based on the first TPMI, and transmitting, to the base station, the uplink signal based on the determined codebook subset. Accordingly, there is an advantage in that flexibility in the transmission antenna design of a UE can be increased because the degree of freedom of antenna port selection is increased.

Claims14

Dependent claims

A method of transmitting, by a user equipment (UE), a uplink signal based on a codebook in a wireless communication system, the method comprising:

receiving, from a base station, downlink control information (DCI) including a first transmit precoding matrix indicator (TPMI);
determining a codebook subset related to a transmission of the uplink signal based on the first TPMI;
and
transmitting, to the base station, the uplink signal based on the determined codebook subset,
wherein the codebook subset is included in a codebook for a rank 1 using four antenna ports, and
wherein the codebook subset includes at least one codeword for selecting one antenna port.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application

16/124,550Filed 7 Sep 2018

Priority

7 Sep 2017

Published

28 Mar 2019

Term ends

Not estimatedThe source records don’t support an estimate.

Classification17 codes

H04B 7/0639
Feedback format: using selective indices, e.g. of a codebook, e.g. pre-distortion matrix index [PMI] or for beam selection
H04B 7/0481
Special codebook structures directed to feedback optimisation: using subset selection of codebooks
H04B 7/063
Feedback content: parameters other than those covered in groups H04B7/0623 - H04B7/0634, e.g. channel matrix rank or transmit mode selection
H04L 1/1614
Details of the supervisory signal: using bitmaps

Method for transmitting a uplink signal based on a codebook in a wireless communication system and apparatus therefor

Life of this patent

Method for transmitting a uplink signal based on a codebook in a wireless communication system and apparatus therefor

Life of this patent

Abstract

Claims14