公开(公告)号：US10945292B2

公开(公告)日：2021-03-09

申请号：US16446391

申请日：2019-06-19

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Xiaohu You ,  Mao Wang ,  Yalin Liu ,  Jun Zhang ,  Min Hua ,  Junping Sun

IPC: H04W74/08 ,  H04W72/04 ,  H04W72/08 ,  H04W74/00 ,  H04W72/02 ,  H04L29/08

Abstract: A random access method and a device are provided, to enable a device in the Internet of Things to implement random access. The method includes: selecting, by a terminal from at least two frequencies, frequencies used to send a physical random access channel PRACH signal, as frequencies occupied by target PRACH resources, where the at least two frequencies each have a preset bandwidth, and there is no intersection between frequency bands of the at least two frequencies; generating, by the terminal, a target PRACH signal based on the frequencies occupied by the target PRACH resources, a root allocated by a base station, and a cyclic shift corresponding to the root allocated by the base station; and sending, by the terminal, the target PRACH signal to the base station on the target PRACH resources.

公开(公告)号：US11026197B2

公开(公告)日：2021-06-01

申请号：US16530460

申请日：2019-08-02

Applicant: Huawei Technologies Co., Ltd.

Inventor： Xiaohu You ,  Mao Wang ,  Jun Zhang ,  Yalin Liu ,  Hengjie Hu ,  Jun Zou

IPC: H04W56/00 ,  H04W72/04 ,  H04L5/00

Abstract: A communication method includes: determining, by a first device, a first synchronization signal, where the first synchronization signal is used by a second device for symbol timing alignment and frequency synchronization; and sending, by the first device, the first synchronization signal on each group of subcarriers of M groups of subcarriers, where M is a positive integer greater than or equal to 2. According to the communication method in this application, the first device sends the first synchronization signal on each group of subcarriers of a plurality of groups of subcarriers, so that the second device can select, based on a reception capability of the second device, an appropriate bandwidth to receive the first synchronization signal.

公开(公告)号：US20190357162A1

公开(公告)日：2019-11-21

申请号：US16530460

申请日：2019-08-02

Applicant: Huawei Technologies Co., Ltd.

Inventor： Xiaohu You ,  Mao Wang ,  Jun Zhang ,  Yalin Liu ,  Hengjie Hu ,  Jun Zou

IPC: H04W56/00 ,  H04L5/00 ,  H04W72/04

Abstract: This application provides a communication method and device. The method includes: determining, by a first device, a first synchronization signal, where the first synchronization signal is used by a second device for symbol timing alignment and frequency synchronization; and sending, by the first device, the first synchronization signal on each group of subcarriers of M groups of subcarriers, where M is a positive integer greater than or equal to 2. According to the communication method in this application, the first device sends the first synchronization signal on each group of subcarriers of a plurality of groups of subcarriers, so that the second device can select, based on a reception capability of the second device, an appropriate bandwidth to receive the first synchronization signal. In this way, a device with wideband reception performance and a device with narrowband reception performance can be supported.