# US 12,604,315 B2 · Terminal, radio communication method, and base station

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- Number: US 12,604,315 B2
- Document ID: US12604315B2
- Status: Granted
- Kind: B2
- Application number: 18/283,415
- Filed: 2021-03-24
- Published: 2024-05-23
- Granted: 2026-04-14
- Earliest claimed: 2021-03-24
- Assignees: Ntt Docomo, Inc.
- Applicants: Ntt Docomo, Inc.
- Inventors: Yuki Matsumura; Satoshi Nagata; Jing Wang; Lan Chen
- Web page: https://patentgrep.com/patent/US12604315B2

## CPC

- H04W 72/1273: of downlink data flows
- H04L 5/0048: {Allocation of pilot signals, i.e. of signals known to the receiver (allocation of control signalling H04L5/0053; use of control signalling H04L5/0091)}
- H04L 5/0051: {of dedicated pilots, i.e. pilots destined for a single user or terminal}
- H04L 27/26025: {Numerology, i.e. varying one or more of symbol duration, subcarrier spacing, Fourier transform size, sampling rate or down-clocking (allocating sub-channels of the transmission path H04L5/003)}
- H04W 56/0015: {one node acting as a reference for the others}
- 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 judges allocation of a downlink shared channel or a reference signal for the downlink shared channel, based on at least one of a cell index, a control resource set pool index, and a group index configured for a control resource set to which each of the synchronization signal block and the downlink shared channel corresponds; and a reception section that receives at least one of the synchronization signal block and the downlink shared channel.

## Claims

### Claim 1

A terminal comprising:
a processor that determines an allocation of a demodulation reference signal (DM-RS) for a physical downlink shared channel (PDSCH) based on physical cell IDs to which a synchronization signal/physical broadcast channel (SS/PBCH) block and the PDSCH correspond; and
a receiver that receives at least one of the SS/PBCH block and the DM-RS for the PDSCH,
wherein if the SS/PBCH block and the PDSCH are transmitted from a same cell, the processor does not expect to receive the DM-RS for the PDSCH in a resource element that overlaps with a resource element for the SS/PBCH block, and
wherein if the SS/PBCH block and the PDSCH are transmitted from different cells, the PDSCH is associated with a transmission configuration indication (TCI) state.

### Claim 2 (depends on 1)

The terminal according to claim 1, wherein a different allocation condition is applied to the SS/PBCH block and the PDSCH transmitted from the different cells than an allocation condition applied to the SS/PBCH block and the PDSCH transmitted from the same cell.

### Claim 3

A radio communication method for a terminal, comprising:
determining an allocation of a demodulation reference signal (DM-RS) for a physical downlink shared channel (PDSCH) based on physical cell IDs to which a synchronization signal/physical broadcast channel (SS/PBCH) block and the PDSCH correspond; and
receiving at least one of the SS/PBCH block and the DM-RS for the PDSCH,
wherein if the SS/PBCH block and the PDSCH are transmitted from a same cell, the DM-RS for the PDSCH is not expected to be received in a resource element that overlaps with a resource element for the SS/PBCH block, and
wherein if the SS/PBCH block and the PDSCH are transmitted from different cells, the PDSCH is associated with a transmission configuration indication (TCI) state.

### Claim 4

A system comprising:
a terminal; and
a base station;
wherein the terminal comprises:
a processor that determines an allocation of a demodulation reference signal (DM-RS) for a physical downlink shared channel (PDSCH) based on physical cell IDs to which a synchronization signal/physical broadcast channel (SS/PBCH) block and the PDSCH correspond; and
a receiver that receives at least one of the SS/PBCH block and the DM-RS for the PDSCH,
wherein if the SS/PBCH block and the PDSCH are transmitted from a same cell, the processor does not expect to receive the DM-RS for the PDSCH in a resource element that overlaps with a resource element for the SS/PBCH block, and
wherein if the SS/PBCH block and the PDSCH are transmitted from different cells, the PDSCH is associated with a transmission configuration indication (TCI) state, and
the base station comprises:
a transmitter that transmits at least one of the SS/PBCH block and the DM-RS for the PDSCH.