User terminal and radio communication method

Patent metadata

Field	Value
Publication number	US-11564203-B2
Application number	US-201716637911-A
Country	US
Kind code	B2
Filing date	Aug 18, 2017
Priority date	Aug 18, 2017
Publication date	Jan 24, 2023
Grant date	Jan 24, 2023

Abstract

A user terminal according to one aspect of the present disclosure includes: a transmitting section that performs uplink (UL) data transmission, independently of a UL transmission indication from a radio base station; a receiving section that receives information of a plurality of candidates, regarding a value of a parameter used for the UL data transmission; and a control section that determines application of a value determined based on the information of the plurality of candidates to the UL data transmission. According to one aspect of the present disclosure, communication throughput reduction and so on can be prevented even when UL grant-free transmission is performed.

First claim

The invention claimed is:

1. A terminal comprising:
a receiver that receives Radio Resource Control (RRC) configuration including multiple configuration information used for Physical Uplink Shared Channel (PUSCH) transmission without reception of an uplink grant for scheduling; and
a processor that controls the PUSCH transmission based on at least one of the multiple configuration information,
wherein each of the multiple configuration information is a parameter set that includes waveform information and Modulation and Coding Scheme (MCS) information,
wherein each of the multiple configuration information is associated with a certain parameter set index,
wherein the waveform information, included in each of the multiple configuration information, indicates a DFT spread OFDM (DFT-S-OFDM) to the PUSCH of a plurality of types,
wherein the plurality of types comprises a transmission of a type 1 based on the RRC configuration, and a transmission of a type 2 based on PDCCH, and
wherein the processor determines a default value of the MCS information.

2. The terminal according to claim 1 , wherein the processor autonomously determines information to apply to the PUSCH transmission among the multiple configuration information.

3. A radio communication method for a terminal comprising:
receiving Radio Resource Control (RRC) configuration including multiple configuration information used for Physical Uplink Shared Channel (PUSCH) transmission without reception of an uplink grant for scheduling; and
controlling the PUSCH transmission based on at least one of the multiple configuration information,
wherein each of the multiple configuration information is a parameter set that includes waveform information and Modulation and Coding Scheme (MCS) information,
wherein each of the multiple configuration information is associated with a certain parameter set index,
wherein the waveform information, included in each of the multiple configuration information, indicates a DFT spread OFDM (DFT-S-OFDM) to the PUSCH of a plurality of types,
wherein the plurality of types comprises a transmission of a type 1 based on the RRC configuration, and a transmission of a type 2 based on PDCCH, and
wherein the radio communication method further comprises determining a default value of the MCS information.

4. A base station comprising:
a transmitter that transmits Radio Resource Control (RRC) configuration including multiple configuration information used for Physical Uplink Shared Channel (PUSCH) transmission without reception of an uplink grant for scheduling; and
a processor that controls reception of a PUSCH that is transmitted based on at least one of the multiple configuration information,
wherein each of the multiple configuration information is a parameter set that includes waveform information and Modulation and Coding Scheme (MCS) information,
wherein each of the multiple configuration information is associated with a certain parameter set index,
wherein the waveform information, included in each of the multiple configuration information, indicates a DFT spread OFDM (DFT-S-OFDM) to the PUSCH of a plurality of types,
wherein the plurality of types comprises a transmission of a type 1 based on the RRC configuration, and a transmission of a type 2 based on PDCCH, and
wherein a default value of the MCS information is determined by a terminal.

5. A system comprising: a base station and a terminal,
wherein the base station comprises:
a transmitter that transmits Radio Resource Control (RRC) configuration including multiple configuration information used for Physical Uplink Shared Channel (PUSCH) transmission without reception of an uplink grant for scheduling; and
a first processor that controls reception of a PUSCH that is transmitted based on at least one of the multiple configuration information,

wherein the terminal comprises:
a receiver that receives the RRC configuration; and
a second processor that controls the PUSCH transmission based on at least one of the multiple configuration information; and

wherein each of the multiple configuration information is a parameter set that includes waveform information and Modulation and Coding Scheme (MCS) information,
wherein each of the multiple configuration information is associated with a certain parameter set index,
wherein the waveform information, included in each of the multiple configuration information, indicates a DFT spread OFDM (DFT-S-OFDM) to the PUSCH of a plurality of types,
wherein the plurality of types comprises a transmission of a type 1 based on the RRC configuration, and a transmission of a type 2 based on PDCCH, and
wherein the second processor determines a default value of the MCS information.

Assignees

• Ntt Docomo Inc

Inventors

• Osawa Ryosuke

Classifications

• H04W52/365

  Power headroom reporting · CPC title

• H04W72/02 Primary

  Selection of wireless resources by user or terminal · CPC title

• H04W74/004

  in the uplink, i.e. towards network · CPC title

• H04L27/26

  Systems using multi-frequency codes (H04L27/32 takes precedence) · CPC title

• H04W28/18 Primary

  Negotiating wireless communication parameters · CPC title