公开(公告)号：US20230014413A1

公开(公告)日：2023-01-19

申请号：US17950532

申请日：2022-09-22

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Hang LIU ,  Xingxin ZHANG ,  Changqing YANG

IPC: H04W48/02 ,  H04W4/48

Abstract: This application relates to an access control method, applied to the field of short-range communication, for example, cockpit domain communication. The method includes: determining that a status of a first device is a first status; and sending first indication information, where the first indication information is used to indicate whether access of at least one second device to the first device is allowed. A system broadcast message carrying system status information is sent, so that after a non-vehicle-mounted device receives the system broadcast message, the non-vehicle-mounted device determines, based on the system status information, whether to initiate a random access request. This avoids impact, caused by random access request initiation performed by the non-vehicle-mounted device in this phase, on checking a status of a vehicle-mounted device performed by a CDC and self-check and access performed by the vehicle-mounted device.

公开(公告)号：US20210045156A1

公开(公告)日：2021-02-11

申请号：US17079125

申请日：2020-10-23

Applicant: Huawei Technologies Co., Ltd.

Inventor： Pan ZHANG ,  Xingxin ZHANG ,  Xuehuan WANG

IPC: H04W74/08 ,  H04W74/00

Abstract: A method is described wherein a user equipment (UE) receives first information indicating a direction of data received by a base station in each one of a plurality of time periods. The UE maintains a first list including a sequence of the directions in which the base station receives the data. The sequence indicates channel quality when the base station receives, in the different directions, the data. The UE receives second information indicating listening durations to listen on a channel in the different directions in the first list, and a listening duration corresponding to a direction ranked higher is shorter. The UE determines, in accordance with the start of the first time period and based on the second information, a first listening duration corresponding to the first direction. If the channel is idle within the first listening duration, the UE accesses the channel.

公开(公告)号：US20190215223A1

公开(公告)日：2019-07-11

申请号：US16358207

申请日：2019-03-19

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Qingyong CHEN ,  Bo WANG ,  Xingxin ZHANG ,  Chunhui ZHU

IPC: H04L27/36 ,  H04L27/38

CPC classification number: H04L27/362 ,  H04L27/36 ,  H04L27/38

Abstract: Embodiments of the present application disclose a modulation method, including: performing coding processing on raw data to obtain a coded sequence; performing constellation mapping on the coded sequence based on a preset constellation diagram, to obtain M symbols; dividing the M symbols into N segments; obtaining a constellation phase of each symbol in the N segments; adjusting a constellation phase of a symbol in each of the N segments according to a preset phase adjustment rule, where the N segments are concurrently adjusted; and modulating M symbols obtained through phase adjustment, to obtain a modulated signal, and sending the modulated signal. Correspondingly, this application further provides a demodulation method, a sending device, a receiving device, and a communications system.

公开(公告)号：US20130083781A1

公开(公告)日：2013-04-04

申请号：US13689445

申请日：2012-11-29

Applicant: Huawei Technologies Co., Ltd.

Inventor： Xingxin ZHANG ,  Xun YANG ,  Tianyu WU ,  Menghong LIU

IPC: H04W72/04

CPC classification number: H04W72/14 ,  H04B7/0452 ,  H04L1/1614 ,  H04L1/1685 ,  H04L2001/0092 ,  H04W72/0406 ,  H04W72/042 ,  H04W72/0446 ,  H04W74/0833 ,  H04W84/12

Abstract: Embodiments of the present invention disclose a method and an apparatus for retrieving transmit opportunity control in reverse direction grant, so that a conflict occurring between a case where an RD Initiator continues sending another frame to an RD Responder after retrieving TXOP control and a case where a terminal other than the RD Initiator sends a block acknowledgement to the RD Responder can be avoided. The method provided in the embodiments of the present invention includes: when an RD Initiator fails to correctly demodulate a frame sent by an RD Responder, retrieving, by the RD Initiator, TXOP control by using a PIFS if it is impossible for the RD Responder to enable an MU-MIMO mode, and retrieving, by the RD Initiator, the TXOP control by using a duration if it is possible for the RD Responder to enable the MU-MIMO mode, where the duration is longer than the PIFS.

Abstract translation: 本发明的实施例公开了一种用于在反向授权中检索发送机会控制的方法和装置，使得在RD发起者在检索TXOP控制之后继续向RD响应者发送另一帧的情况之间发生冲突， 除RD启动器之外的终端发送块确认给RD响应者可以避免。 本发明实施例中提供的方法包括：当RD启动器未能正确地解调由RD响应器发送的帧时，由RD启动器检索通过使用PIFS的TXOP控制，如果RD应答器不可能 启用MU-MIMO模式，并且如果RD响应器能够启用MU-MIMO模式（其持续时间长于PIFS），则RD启动器通过使用持续时间来检索TXOP控制。