公开(公告)号：US20210022191A1

公开(公告)日：2021-01-21

申请号：US16981547

申请日：2019-02-15

Applicant: VIVO MOBILE COMMUNICATION CO., LTD.

Inventor： Lei JIANG ,  Kai WU ,  Zhi LU

IPC: H04W74/08 ,  H04W56/00

Abstract: A signal transmission method and a network device are provided. The method is applied to the network device and includes: performing LBT for a channel in an SSB transmission direction before a transmission of an SSB in an unlicensed band; and transmitting the SSB when the channel is detected as idle.

公开(公告)号：US20200374821A1

公开(公告)日：2020-11-26

申请号：US16959445

申请日：2019-01-02

Applicant: VIVO MOBILE COMMUNICATION CO., LTD.

Inventor： Kai WU ,  Peng SUN ,  Xueming PAN

IPC: H04W56/00 ,  H04W52/02 ,  H04W76/28 ,  H04J13/00 ,  H04W76/11 ,  H04L29/12 ,  H04W76/27 ,  H04W68/00

Abstract: The present disclosure provides a time-and-frequency synchronization method, a network device, and a terminal. The time-and-frequency synchronization method for the terminal includes: subsequent to determining that the terminal in an idle state or a DRX state needs to be woken up to receive a downlink signal, receiving a physical signal for time-and-frequency synchronization from the network device; and performing time-and-frequency synchronization in accordance with the physical signal.

公开(公告)号：US20200351760A1

公开(公告)日：2020-11-05

申请号：US16765110

申请日：2018-10-11

Applicant: VIVO MOBILE COMMUNICATION CO., LTD.

Inventor： Kai WU ,  Jingzhi MA ,  Zichao JI ,  Wei BAO ,  Siqi LIU ,  Yu DING

IPC: H04W48/12 ,  H04W72/04

Abstract: A method of indicating a system information type, a network device and a user equipment are provided. The method includes: determining indication information configured to indicate a System Information (SI) type; sending, to a user equipment, a Physical Downlink Control Channel (PDCCH) carrying the indication information.