公开(公告)号：US20190306894A1

公开(公告)日：2019-10-03

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

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：US20190306821A1

公开(公告)日：2019-10-03

申请号：US16446291

申请日：2019-06-19

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Hengjie HU ,  Jun ZHANG ,  Junping SUN

IPC: H04W56/00

Abstract: In a time deviation determining method, a terminal determines an uplink timing advance between the terminal and a base station; determines a one-way transmission delay based on the uplink timing advance; and determines a clock time deviation between the terminal and the base station based on the one-way transmission delay, a time difference between a base-station clock time of a system frame in two system frames and a terminal clock time of a following system frame in the two system frames, and a time difference between the two system frames. In the solution provided in this application, the clock deviation between the terminal and the base station can be determined more flexibly and accurately. In addition, signaling interaction between the terminal and the base station is reduced, and network resources are saved.