Terminal and base station

Patent metadata

Field	Value
Publication number	US-2023023821-A1
Application number	US-202017758431-A
Country	US
Kind code	A1
Filing date	Jan 31, 2020
Priority date	Jan 31, 2020
Publication date	Jan 26, 2023
Grant date	—

Abstract

A terminal includes a reception unit that receives configuration information in a high frequency band higher than or equal to a frequency band of a frequency range 2 (FR2), the FR2 being in a range including a frequency range 1 (FR1) that is a low frequency band and the FR2 that is a high frequency band in a new radio (NR) system; and a control unit that configures at least one of a format of a random access preamble, a sequence of the random access preamble, or a subcarrier spacing applied to a channel on which the random access preamble is to be transmitted, wherein the at least one of the format, the sequence, or the subcarrier spacing is associated with an index included in the configuration information.

First claim

1 . A terminal comprising:
a reception unit that receives configuration information in a high frequency band higher than or equal to a frequency band of a frequency range 2 (FR2), the FR2 being in a range including a frequency range 1 (FR1) that is a low frequency band and the FR2 that is a high frequency band in a new radio (NR) system; and a control unit that configures at least one of a format of a random access preamble, a sequence of the random access preamble, or a subcarrier spacing applied to a channel on which the random access preamble is to be transmitted, wherein the at least one of the format, the sequence, or the subcarrier spacing is associated with an index included in the configuration information.

2 . The terminal according to claim 1 , wherein the format of the random access preamble includes a short guard period corresponding to a propagation loss characteristic of a radio wave in the high frequency band higher than or equal to the frequency band of the FR2.

3 . The terminal according to claim 1 , wherein the format of the random access preamble is a format in which a cyclic prefix is inserted per OFDM symbol of the random access preamble.

4 . The terminal according to claim 1 , wherein two or more subcarrier spacings are applied to the channel for transmitting the random access preamble associated with the index included in the configuration information.

5 . A base station comprising:
a control unit that configures configuration information including an index associated with at least one of a format of a random access preamble, a sequence of the random access preamble, or a subcarrier spacing applied to a channel on which the random access preamble is to be transmitted, wherein the at least one of the format, the sequence, or the subcarrier spacing is configurable for a terminal in a high frequency band higher than or equal to a frequency band of a frequency range 2 (FR2), the FR2 being in a range including a frequency range 1 (FR1) that is a low frequency band and the FR2 that is a high frequency band in a new radio (NR) system; and a transmission unit that transmits the configuration information to the terminal.

Assignees

• Ntt Docomo Inc

Inventors

• Harada Hiroki
• Ohara Tomoya
• Nagata Satoshi
• Wang Jing

Classifications

• H04L5/0048 Primary

  Allocation of pilot signals, i.e. of signals known to the receiver (allocation of control signalling H04L5/0053; use of control signalling H04L5/0091) · CPC title

• H04W16/14

  Spectrum sharing arrangements {between different networks} · CPC title

• H04W72/0453

  Resources in frequency domain, e.g. a carrier in FDMA · CPC title

• H04W74/0833 Primary

  Random access procedures, e.g. with 4-step access · CPC title

• H04L27/2666

  Acquisition of further OFDM parameters, e.g. bandwidth, subcarrier spacing, or guard interval length · CPC title