# US 12,120,665 B2 · Terminal and radio communication method

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- Number: US 12,120,665 B2
- Document ID: US12120665B2
- Status: Granted
- Kind: B2
- Application number: 17/617,843
- Filed: 2019-06-13
- Published: 2022-08-04
- Granted: 2024-10-15
- Earliest claimed: 2019-06-13
- Assignees: Ntt Docomo, Inc.
- Applicants: Ntt Docomo, Inc.
- Inventors: Yuki Matsumura; Satoshi Nagata; Shaozhen Guo; Jing Wang; Xiaolin Hou
- Web page: https://patentgrep.com/patent/US12120665B2

## CPC

- H04W 72/1263: Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
- H04L 1/08: by repeating transmission, e.g. Verdan system {(H04L1/1858 and H04L1/189 take precedence)}
- H04L 1/1642: {Formats specially adapted for sequence numbers}
- H04L 1/1819: {with retransmission of additional or different redundancy}
- H04L 1/1864: {ARQ related signaling (H04L1/1607 takes precedence)}
- H04L 1/1896: {ARQ related signaling}
- H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)

## Abstract

A terminal according to one aspect of the present disclosure includes a control section that determines mapping of a sequence of a redundancy version (RV) which is to be applied for a channel that is repeatedly transmitted, to each transmission occasion, based on a field of downlink control information (DCI) for scheduling the channel, and a receiving section that receives the channel based on the mapping. According to one aspect of the present disclosure, repetition processing can be appropriately controlled.

## Claims

### Claim 1

A terminal comprising:
a processor that determines, based on a field regarding redundancy version (RV) and a transmission configuration indication (TCI) field indicating a number of TCI in downlink control information (DCI) scheduling a channel repetitively transmitted, a mapping between a plurality of indices of the RV applied for the channel and each transmission occasion of the channel; and
a receiver that receives the channel based on the mapping,
wherein the processor determines the mapping based on a codepoint of the TCI field, in response to an offset between a reception of the DCI and a reception of the channel being less than a threshold.

### Claim 2

A radio communication method for a terminal, comprising:
determining, based on a field regarding redundancy version (RV) and a transmission configuration indication (TCI) field indicating a number of TCI in downlink control information (DCI) scheduling a channel repetitively transmitted, a mapping between a plurality of indices of the RV applied for the channel and each transmission occasion of the channel; and
receiving the channel based on the mapping,
wherein the mapping is determined based on a codepoint of the TCI field, in response to an offset between a reception of the DCI and a reception of the channel being less than a threshold.

### Claim 3

A base station comprising:
a processor that controls generation of downlink control information (DCI) that schedules a channel repetitively transmitted and contains a field regarding redundancy version (RV) and a transmission configuration indication (TCI) field indicating a number of TCI for determining a mapping between a plurality of indices of the RV applied for the channel and each transmission occasion of the channel, wherein the mapping is determined based on a codepoint of the TCI field, in response to an offset between a reception of the DCI and a reception of the channel being less than a threshold; and
a transmitter that transmits the DCI and transmits the channel.

### Claim 4

A system comprising a terminal and a base station, wherein
the terminal comprises:
a processor of the terminal that determines, based on a field regarding redundancy version (RV) and a transmission configuration indication (TCI) field indicating a number of TCI in downlink control information (DCI) scheduling a channel repetitively transmitted, a mapping between a plurality of indices of the RV applied for the channel and each transmission occasion of the channel; and
a receiver that receives the channel based on the mapping,
wherein the processor determines the mapping based on a codepoint of the TCI field, in response to an offset between a reception of the DCI and a reception of the channel being less than a threshold, and
the base station comprises:
a processor of the base station that controls generation of the DCI, and
a transmitter that transmits the DCI and transmits the channel.