EP-4742738-A1 - TERMINAL, WIRELESS COMMUNICATION METHOD, AND BASE STATION

EP4742738A1EP 4742738 A1EP4742738 A1EP 4742738A1EP-4742738-A1

Abstract

A terminal according to an aspect of the present disclosure includes: a receiving section that receives information related to a plurality of channel measurement resources and information related to a report quantity; and a control section that performs, based on the information related to the report quantity, control to report an offset related to one or more parameters between one or more reference channel measurement resources selected from the plurality of channel measurement resources and the rest of the channel measurement resources other than the reference channel measurement resources, wherein the control section judges, based on at least one of the information related to the report quantity and a band type for reporting to be performed, a mapping order for channel state information.

Inventors

MATSUMURA, YUKI
NAGATA, SATOSHI
WANG, JING
CHEN, LAN

Assignees

NTT DOCOMO, INC.

Dates

Publication Date: 20260513
Application Date: 20230705

Claims (6)

A terminal comprising: a receiving section that receives information related to a plurality of channel measurement resources and information related to a report quantity; and a control section that performs, based on the information related to the report quantity, control to report an offset related to one or more parameters between one or more reference channel measurement resources selected from the plurality of channel measurement resources and the rest of the channel measurement resources other than the reference channel measurement resources, wherein the control section judges, based on at least one of the information related to the report quantity and a band type for reporting to be performed, a mapping order for channel state information.
The terminal according to claim 1, wherein the control section reports, in a case of reporting an offset related to a plurality of parameters, information related to one reference channel measurement resource.
The terminal according to claim 1, wherein the control section reports, in a case of reporting an offset related to a plurality of parameters, information related to a plurality of reference channel measurement resources.
The terminal according to claim 1, wherein the control section reports, in a case where subband reporting is configured as the band type, an offset value corresponding to the rest of the channel measurement resources corresponding to every subband.
A radio communication method for a terminal, the radio communication method comprising: receiving information related to a plurality of channel measurement resources and information related to a report quantity; and performing, based on the information related to the report quantity, control to report an offset related to one or more parameters between one or more reference channel measurement resources selected from the plurality of channel measurement resources and the rest of the channel measurement resources other than the reference channel measurement resources, wherein a mapping order for channel state information is judged, based on at least one of the information related to the report quantity and a band type for reporting to be performed.
A base station comprising: a transmitting section that transmits, to a terminal, information related to a plurality of channel measurement resources and information related to a report quantity; and a control section that indicates, to the terminal, based on the information related to the report quantity, reporting of an offset related to one or more parameters between one or more reference channel measurement resources selected from the plurality of channel measurement resources and the rest of the channel measurement resources other than the reference channel measurement resources, wherein the control section indicates, based on at least one of the information related to the report quantity and a band type for reporting to be performed, a mapping order for channel state information.

Description

Technical Field The present disclosure relates to a terminal, a radio communication method, and a base station in next-generation mobile communication systems. Background Art In a Universal Mobile Telecommunications System (UMTS) network, the specifications of Long-Term Evolution (LTE) have been drafted for the purpose of further increasing high speed data rates, providing lower latency and so on (see Non-Patent Literature 1). In addition, for the purpose of further high capacity, advancement and the like of the LTE (Third Generation Partnership Project (3GPP (registered trademark)) Release (Rel.) 8 and Rel. 9), the specifications of LTE-Advanced (3GPP Rel. 10 to Rel. 14) have been drafted. Successor systems of LTE (for example, also referred to as "5th generation mobile communication system (5G)," "5G+ (plus)," "6th generation mobile communication system (6G)," "New Radio (NR)," "3GPP Rel. 15 (or later versions)," and so on) are also under study. Citation List Non-Patent Literature Non-Patent Literature 1: 3GPP TS 36.300 V8.12.0 "Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access Network (E-UTRAN); Overall description; Stage 2 (Release 8)," April, 2010 Summary of Invention Technical Problem For future radio communication systems (for example, NR), it is under study to report channel state information (CSI) based on reception of a reference signal. In addition, it is under study that a plurality of transmission/reception points (multiple Transmission/Reception Points (TRPs), multi-TRP (Multi TRP (MTRP))) or a plurality of panels (multiple panels, multi-panel) perform DL transmission to a terminal (user terminal, User Equipment (UE)). Coherent joint transmission (CJT) using multi-TRP/multi-panel is also under study. For Rel. 18 or later versions, it is assumed to employ CJT even in a case where connection between TRPs is not an ideal environment (for example, non-ideal backhaul environment). However, studies have not sufficiently been made on how communication control (for example, CSI reporting or the like) in CJT using multi-TRP/multi-panel is performed. In view of this, an object of the present disclosure is to provide a terminal, a radio communication method, and a base station that enable communication to be appropriately performed even in a case where CJT using multi-TRP/multi-panel is supported. Solution to Problem A terminal according to an aspect of the present disclosure includes: a receiving section that receives information related to a plurality of channel measurement resources and information related to a report quantity; and a control section that performs, based on the information related to the report quantity, control to report an offset related to one or more parameters between one or more reference channel measurement resources selected from the plurality of channel measurement resources and the rest of the channel measurement resources other than the reference channel measurement resources, wherein the control section judges, based on at least one of the information related to the report quantity and a band type for reporting to be performed, a mapping order for channel state information. Advantageous Effects of Invention An aspect of the present disclosure enables communication to be appropriately performed even in a case where CJT using multi-TRP/multi-panel is supported. Brief Description of Drawings [FIG. 1] FIG. 1 is a diagram to show an example of reporting of an offset of delay/doppler/phase between a plurality of TRPs/CMRs according to a first embodiment.[FIG. 2] FIGS. 2A to 2C are each a diagram to show an example of an offset of delay/doppler/phase between a plurality of TRPs/CMRs according to a second embodiment.[FIG. 3] FIGS. 3A and 3B are each a diagram to show an example of an offset of delay/doppler/phase between a plurality of TRPs/CMRs according to the second embodiment.[FIG. 4] FIGS. 4A and 4B are each a diagram to show an example of association between UCI (or codepoint) and a value range of offset according to the second embodiment.[FIG. 5] FIGS. 5A to 5C are each a diagram to show an example of an offset of delay/doppler/phase between a plurality of TRPs/CMRs for a case that subband reporting is configured, according to a third embodiment.[FIG. 6] FIGS. 6A to 6C are each a diagram to show an example of a CSI mapping order according to a fifth embodiment.[FIG. 7] FIGS. 7A to 7C are each a diagram to show another example of the CSI mapping order according to the fifth embodiment.[FIG. 8] FIGS. 8A to 8C are each a diagram to show another example of the CSI mapping order according to the fifth embodiment.[FIG. 9] FIG. 9 is a diagram to show another example of the CSI mapping order according to the fifth embodiment.[FIG. 10] FIG. 10 is a diagram to show an example of association between UCI (or codepoint) and a value range of offset according to a sixth embodiment.[FIG. 11] FIG. 11 is a diagram to show an example of a schema