Patent · US Active

Reference signal transmission method, channel state information feedback method, base station and mobile station

US11245450B2 · kind B2 · utility

3Cited by

1References

6Claims

0Family size

Assignee

NTT DOCOMO, INC. · JP

Inventors

Chongning Na · Beijing, CN
Huiling Jiang · Beijing, CN
Yuichi Kakishima · Tokyo, JP
Satoshi Nagata · Tama, JP

Key dates

Filing date	Mar 30, 2017
Grant date	Feb 8, 2022
Priority date	—
Expiry date	Dec 2, 2037

Classification

Technology area (CPC H)Electricity
CPC primaryH04B7/06956
WIPO fieldTelecommunications
WIPO sectorElectrical engineering

Abstract

A terminal is disclosed that includes a processor that performs channel measurement based on a first Channel State Information-Reference Signal (CSI-RS) and performs channel measurement based on a second CSI-RS; and a transmission section that transmits a first Channel State Information (CSI) feedback based on the first CSI-RS and a second CSI feedback based on the second CSI-RS. Additionally, when the first CSI-RS is an un-precoded CSI-RS, the first CSI feedback only includes a part of information of CSI feedback based on the un-precoded CSI-RS that is a precoding matrix indicator (PMI) or are the PMI and a rank indicator (RI). In another aspect, a CSI feedback method for a terminal is also disclosed.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.