Granted Patent B2

US 12,659,780 · App. 18/277,479 · Granted Jun 16, 2026

Inventors: Shohei Yoshioka (Tokyo, JP); Shinya Kumagai (Tokyo, JP); Yuki Takahashi (Tokyo, JP); Mayuko Okano (Tokyo, JP); Masaya Okamura (Tokyo, JP); Satoshi Nagata (Tokyo, JP)

Assignee: NTT DOCOMO, INC.

H04W24/10H04W24/08

Abstract

Claims (15)

1 . A communication apparatus comprising:

a receiver configured to receive, from another communication apparatus, a signal requesting a CSI (Channel State Information) report and a CSI reference signal, in a resource autonomously selected by the another communication apparatus;

a processor configured to perform measurement by using the CSI reference signal; and

a transmitter configured to transmit, to the another communication apparatus, a CSI report based on a result of the measurement,

wherein the processor is configured to autonomously determine a signal from among a data signal, a control signal, a reference signal, and a preamble signal received from the another communication apparatus after a predetermined timing from a timing at which the signal requesting the CSI report is received, as the CSI reference signal to be used for the measurement, and

wherein the predetermined timing is specified by a control signal.

2 . The communication apparatus according to claim 1 , wherein the transmitter transmits the CSI report to the another communication apparatus, when the receiver fails to receive data transmitted from the another communication apparatus for a predetermined number of times or for a predetermined time.

3 . The communication apparatus according to claim 1 , wherein the transmitter autonomously determines the resource to be used for transmitting the CSI report.

4 . The communication apparatus according to claim 3 , wherein the transmitter transmits the CSI report by a predetermined time point after the receiver receives the signal requesting the CSI report.

5 . A communication method executed by a communication apparatus, the communication method comprising:

receiving, from another communication apparatus, a signal requesting a CSI (Channel State Information) report, in a first resource autonomously selected by the another communication apparatus, and to receive a CSI reference signal, in a second resource autonomously selected by the another communication apparatus;

performing measurement by using the CSI reference signal; and

transmitting, to the another communication apparatus, a CSI report based on a result of the measurement,

wherein the communication apparatus autonomously determines a signal from among a data signal, a control signal, a reference signal, and a preamble signal received from the another communication apparatus after a predetermined timing from a timing at which the signal requesting the CSI report is received, as the CSI reference signal to be used for the measurement, and

wherein the predetermined timing is specified by a control signal.

Assignments (1)

Continuity (1)

References Cited (25)