IP Library › Granted Patent US 12,323,821
Granted Patent B2
US 12,323,821 · App. 17/906,587 · Granted Jun 3, 2025

Terminal, radio communication method, and base station

Inventors: Yuki Matsumura (Tokyo, JP); Satoshi Nagata (Tokyo, JP); Jing Wang (Beijing, CN); Shaozhen Guo (Beijing, CN)
Assignee: NTT DOCOMO, INC.
H04W16/28H04W72/1268H04W80/02
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Quick Facts
Patent No.
US 12,323,821
App. No.
17/906,587
Granted
Jun 3, 2025
Kind
B2
Abstract

A terminal according to an aspect of the present disclosure includes: a receiving section that receives information relating to an uplink signal; and a control section that uses, when medium access control (MAC) control element (CE) is indicated and the information satisfies an applicable condition, a specific spatial relation based on the MAC CE for transmitting the uplink signal instead of a spatial relation indicated for the uplink signal. According to an aspect of the present disclosure, QCL parameters can be appropriately determined.

Claims (17)

1. A terminal comprising:

a receiver that receives a configuration of uplink transmission; and

a processor that, when a spatial relation and a pathloss reference signal are not configured by the configuration, a radio resource control (RRC) information element for determining the spatial relation and the pathloss reference signal following a transmission configuration indication (TCI) state based on a specific medium access control (MAC) control element (CE) is received, and the specific MAC CE is received, determines the spatial relation and the pathloss reference signal based on the TCI state indicated by the specific MAC CE.

2. The terminal according to claim 1 , wherein the uplink transmission is at least one of a physical uplink control channel, a physical uplink shared channel, and a sounding reference signal.

3. The terminal according to claim 1 , wherein the processor reports capability information indicating support of the determining the spatial relation and the pathloss reference signal based on the TCI state indicated by the specific MAC CE.

4. The terminal according to claim 2 , wherein the processor reports capability information indicating support of the determining the spatial relation and the pathloss reference signal based on the TCI state indicated by the specific MAC CE.

5. A radio communication method for a terminal, comprising:

receiving a configuration of uplink transmission; and

when a spatial relation and a pathloss reference signal are not configured by the configuration, a radio resource control (RRC) information element for determining the spatial relation and the pathloss reference signal following a transmission configuration indication (TCI) state based on a specific medium access control (MAC) control element (CE) is received, and the specific MAC CE is received, determining the spatial relation and the pathloss reference signal based on the TCI state indicated by the specific MAC CE.

6. A base station comprising:

a transmitter that transmits a configuration of uplink transmission; and

a processor that, when a spatial relation and a pathloss reference signal are not configured by the configuration, a radio resource control (RRC) information element for determining the spatial relation and the pathloss reference signal following a transmission configuration indication (TCI) state based on a specific medium access control (MAC) control element (CE) is received, and the specific MAC CE is received, determines the spatial relation and the pathloss reference signal based on the TCI state indicated by the specific MAC CE.

7. A system comprising a terminal and a base station, wherein

the terminal comprises:

a receiver that receives a configuration of uplink transmission; and

a processor that, when a spatial relation and a pathloss reference signal are not configured by the configuration, a radio resource control (RRC) information element for determining the spatial relation and the pathloss reference signal following a transmission configuration indication (TCI) state based on a specific medium access control (MAC) control element (CE) is received, and the specific MAC CE is received, determines the spatial relation and the pathloss reference signal based on the TCI state indicated by the specific MAC CE, and

the base station transmits the configuration.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Sep 22, 2022
From: MATSUMURA, YUKI; NAGATA, SATOSHI; WANG, JING; GUO, SHAOZHEN
To: NTT DOCOMO, INC.
Reel/Frame 061181/0294 →
Continuity (1)
Related Publication 20230119019A1 · Apr 20, 2023
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