IP Library › Granted Patent US 12689491
Granted Patent B2
US 12689491 · App. 18/280,131 · Granted Jul 21, 2026

Terminal, base station, radio communication system and radio communication method for applying subcarrier spacing

Inventors: Hiroki Harada (Tokyo, JP); Shinya Kumagai (Tokyo, JP); Naoya Shibaike (Tokyo, JP); Satoshi Nagata (Tokyo, JP)
Assignee: NTT DOCOMO, INC.
H04L5/0092
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Quick Facts
Patent No.
US 12689491
App. No.
18/280,131
Granted
Jul 21, 2026
Kind
B2
Abstract

A terminal comprises a control unit that applies a target subcarrier spacing lower than a specific subcarrier spacing in a target frequency band, the target frequency band includes at least a prat of a specific frequency range defined with the specific subcarrier spacing as a minimum subcarrier spacing or a frequency band lower than the specific frequency range, wherein the control unit applies a method different from an initial access method related to the specific subcarrier spacing, for at least a part of an initial access method related to the target subcarrier spacing.

Claims (18)

1 . A terminal comprising:

a control unit that applies a target subcarrier spacing lower than a specific subcarrier spacing in a target frequency band, the target frequency band includes at least a part of a specific frequency range defined with the specific subcarrier spacing as a minimum subcarrier spacing or a frequency band lower than the specific frequency range,

wherein the control unit applies a method different from an initial access method related to the specific subcarrier spacing, for at least a part of an initial access method related to the target subcarrier spacing, and

wherein the initial access method related to the target subcarrier spacing is different from the initial access method related to the specific subcarrier spacing in at least one of a support for a synchronization signal and a support for a control resource set.

2 . A base station comprising:

a control unit that applies a target subcarrier spacing lower than a specific subcarrier spacing in a target frequency band, the target frequency band includes at least a part of a specific frequency range defined with the specific subcarrier spacing as a minimum subcarrier spacing or a frequency band lower than the specific frequency range,

wherein the control unit applies a method different from an initial access method related to the specific subcarrier spacing, for at least a part of an initial access method related to the target subcarrier spacing, and

wherein the initial access method related to the target subcarrier spacing is different from the initial access method related to the specific subcarrier spacing in at least one of a support for a synchronization signal and a support for a control resource set.

3 . A radio communication system comprising:

a terminal; and

a base station; wherein:

the terminal and the base station comprise a control unit that applies a target subcarrier spacing lower than a specific subcarrier spacing in a target frequency band, the target frequency band includes at least a part of a specific frequency range defined with the specific subcarrier spacing as a minimum subcarrier spacing or a frequency band lower than the specific frequency range, and

the control unit applies a method different from an initial access method related to the specific subcarrier spacing, for at least a part of an initial access method related to the target subcarrier spacing,

wherein the initial access method related to the target subcarrier spacing is different from the initial access method related to the specific subcarrier spacing in at least one of a support for a synchronization signal and a support for a control resource set.

4 . A radio communication method comprising:

applying, by a processor of a terminal, a target subcarrier spacing lower than a specific subcarrier spacing in a target frequency band, the target frequency band includes at least a part of a specific frequency range defined with the specific subcarrier spacing as a minimum subcarrier spacing or a frequency band lower than the specific frequency range, and

applying, by the processor of the terminal, a method different from an initial access method related to the specific subcarrier spacing, for at least a part of an initial access method related to the target subcarrier spacing,

wherein the initial access method related to the target subcarrier spacing is different from the initial access method related to the specific subcarrier spacing in at least one of a support for a synchronization signal and a support for a control resource set.