Ntt Docomo, Inc.

Yuki Matsumura

Satoshi Nagata

Kazuki Takeda

Xiaolin Hou

Jing Wang

Shaozhen Guo

Lihui Wang

Shohei Yoshioka

Yuichi Kakishima

Hideaki Takahashi

Hiroki Harada

Kazuaki Takeda

Xin Wang

Weiqi Sun

Nadisanka Rupasinghe

Hideyuki Moroga

Masaya Okamura

Wenjia Liu

Tooru Uchino

Lan Chen

Min Liu

Ryosuke Osawa

Daisuke Murayama

Huiling Li

Runxin Wang

Haralabos Papadopoulos

Tomoya Ohara

Huan Wang

Yousuke Sano

Takayuki Furuta

Yuta Oguma

Lu Jiang

Syouichi Higuchi

A terminal is disclosed including a processor that measures for beam management: a Doppler spread or a coherence time associated with a beam and one or more reporting quantities. The terminal also includes a transceiver that reports the Doppler spread or the coherence time. In other aspects, a method for a terminal and a base station are also disclosed.

Doppler spread based beam measurement and reporting for high speed mobility

A terminal according to an aspect of the present disclosure includes a receiving section that performs reception in at least one of a zero power channel state information reference signal (ZP-CSI-RS) resource and a non zero power channel state information reference signal (NZP-CSI-RS) resource configured for a plurality of transmission/reception points, and a control section that controls interference measurement for at least one of a periodic channel state information (CSI) report, a semi-persistent CSI report, and an aperiodic CSI report based on the reception. According to an aspect of the present disclosure, measurement and reporting of CSI for a multi panel/TRP can be appropriately performed.

Terminal, radio communication method, and base station

A method of channel state information (CSI) reporting is disclosed that includes determining, with a user equipment (UE), whether CSI to be reported includes a matrix based on network (NW) triggering and performing, with the UE, CSI reporting based on the determination. The CSI reporting may be periodic, semi-persistent, or aperiodic CSI reporting. The matrix may be W, W, or both. The NW triggering may be explicitly performed using one or more downlink control information (DCI) bits. The NW triggering may be implicitly performed based on a location of DCI detected by the UE. In other aspects, a user equipment is also disclosed.

Method of sounding reference signal (SRS)-assisted SD beam and FD vector reporting for type II channel state information (CSI)

A terminal according to one aspect of the present disclosure includes a receiving section that receives downlink control information and a downlink shared channel scheduled by the downlink control information on a cell different from a cell for the downlink control information, and a control section that determines, on the basis of at least one of a TCI state (Transmission Configuration Indication state) list or spatial relation list configured for each cell and information notified by the downlink control information, a spatial relation or TCI state applied to an uplink channel corresponding to the downlink control information.

Terminal, radio communication method, base station, and system for configuring uplink or downlink channel based on codepoint of downlink control information field

In order to assume an appropriate base station beam (TCI state) during a period after an RRC reconfiguration procedure and before MAC CE activation in future radio communication systems, one aspect of a user terminal of the present disclosure includes: a receiving section that receives a PDCCH (Physical Downlink Control Channel) after transmission of an RRC (Radio Resource Control) reconfiguration complete message; and a control section, when the RRC reconfiguration involves a random access procedure, assumes that a synchronization signal block or a channel state information reference signal identified during the random access procedure and the PDCCH are quasi-co-located.

Terminal, communication method, base station, and system for random access procedure

A user terminal () includes a reception section that receives a first radio signal transmitted by a first transmission point using a first radio resource and a second radio signal transmitted by a second transmission point using a second radio resource, and a control section that controls reception processing of the first radio signal transmitted by the first transmission point using the first radio resource and the second radio signal transmitted by the second transmission point using the second radio resource on assumption that the first radio resource and the second radio resource are permitted to be configured to at least one of different times and different frequency bands.

User terminal and radio communication method

A terminal according to an aspect of the present disclosure includes: a receiving section that receives information indicating a plurality of transmission configuration indication (TCI) states for a same demodulation reference signal (DMRS) port for physical downlink shared channel (PDSCH); and a control section that determines, based on downlink control information, at least one of a TCI state and resource allocation of each of a plurality of PDSCHs that carry same downlink data. According to an aspect of the present disclosure, it is possible to appropriately receive downlink data from a plurality of transmission points.

A terminal according to one aspect of the present disclosure has a control section that judges indexing of Physical Downlink Control Channel (PDCCH) monitoring occasions or Downlink Control Information (DCI) formats associated with joint feedback, when the terminal is not provided with any CORESET pool index or is provided with a CORESET pool index with a value of '0' for one or more first control resource sets (COntrol REsource SETs (CORESETs)) and is provided with a CORESET pool index with a value of “1” for one or more second CORESETs on an active Downlink Bandwidth Part (DL BWP) of a serving cell, and Acknowledgement (ACK)/Negative Acknowledgement (ACNACK) feedback mode=joint feedback is provided for the serving cell, and a transmitting section that transmits a HARQ-ACK using a Hybrid Automatic Repeat reQuest (HARQ)-ACK codebook or Physical Uplink Control Channel (PUCCH) resource determined based on the indexing. According to one aspect of the present disclosure, in the case of using multi-panel/TRP, it is possible to suitably perform HARQ-ACK feedback.

A terminal according to one aspect of the present disclosure includes a transmitting section that transmits a random access preamble in a given cell when beam failure is detected, and a control section that assumes a same antenna port quasi-co-location parameter as that associated with an index of a reference signal corresponding to the random access preamble for monitoring of a downlink control channel in a given control resource set after a given period from timing at which contention resolution is successful in random access procedure corresponding to the random access preamble and until specific information related to a Transmission Configuration Indication state (TCI state) for a downlink control channel is received. According to one aspect of the present disclosure, it is possible to appropriately update a beam in relation to BFR.

A terminal according to an aspect of the present disclosure includes a receiving section that receives information indicating one or more pathloss reference signals, and a control section that counts the number of active durations of the one or more pathloss reference signals in a specific period, based on the information and performs, while not assuming that the number is greater than a specific value, pathloss estimation.

As for appropriate settings in the case of configuration in which search space other than search space for a beam failure recovery request response (BFRQR) signal is monitored in a beam recovery procedure of a future radio communication system, one aspect of a user terminal of the present disclosure includes: a control section that controls monitor setting related to first search space and second search space other than the first search space in accordance with a carrier for which the first search space for a beam failure recovery request response signal is set; and a receiving section that monitors at least one of the first search space and the second search space based on the setting.

A user terminal according to one aspect of the present disclosure includes: a control section that, when capability information that indicates that full power transmission is supported is transmitted, and when a non coherent or partial and non coherent codebook subsets are configured, assumes that downlink control information can indicate a fully coherent codebook subset; and a transmitting section that performs the full power transmission by applying the fully coherent codebook subset to uplink transmission based on the downlink control information. According to one aspect of the present disclosure, it is possible to appropriately control full power transmission.

The present disclosure provides a terminal and a base station in a communication system. The terminal includes: a receiving unit configured to receive, from a base station, first information indicating a first parameter, where the first parameter indicates a number of candidate transform domain vectors regarding a subcarrier-level precoding matrix, and a value of the first parameter is smaller than a number of subcarriers of the communication system; the receiving unit being further configured to receive, from the base station, second information indicating a second parameter, where the second parameter indicates a number of transform domain vectors used to determine the subcarrier-level precoding matrix; and a control unit configured to determine, from the number of candidate transform domain vectors indicated by the first information, the number of transform domain vectors indicated by the second information.

Terminal and base station in communication system

A terminal according to an aspect of the present disclosure includes a receiving section that receives single downlink control information (DCI) for a plurality of uplink shared channels (Physical Uplink Shared Channels (PUSCHs)), and a control section that controls transmission of the plurality of PUSCHs, based on an extended transmit power control (TPC) command field included in the DCI and spatial relation information (SRI) corresponding to an index associated with the TPC. According to an aspect of the present disclosure, even when multi-TRP is applied, PUSCH repetitive transmission can be appropriately controlled.

A terminal according to an aspect of the present disclosure includes a control section that determines a parameter related to an initial value for generating a scrambling sequence applied to a specific uplink shared channel (Physical Uplink Shared Channel (PUSCH)) based on whether already having a valid cell radio network temporary identifier (C-RNTI), and a transmitting section that transmits, on the specific PUSCH, bits to which scrambling based on the parameter is applied. According to an aspect of the present disclosure, scrambling can be appropriately performed for the PUSCH.

Growing community of inventors

Tokyo, Japan

Yuki Matsumura