公开(公告)号：US20230228818A1

公开(公告)日：2023-07-20

申请号：US18007944

申请日：2021-04-06

Applicant: Huawei Technologies Co., Ltd.

Inventor： Pinhui Chen ,  Weicai Zeng ,  Yuanji He ,  Bo Xie ,  Xiujiang Ma

IPC: G01R31/327 ,  G01R19/165

CPC classification number: G01R31/3278 ,  G01R19/165

Abstract: A fault diagnosis method includes detecting a state of a relay device, sending a fault diagnosis trigger signal to the relay device based on the stateto enable the relay device to enter a fault diagnosis mode, where the fault diagnosis trigger signal includes one or more of a variable supply voltage value, a transmit/receive control signal, and a diagnosis control signal, detecting a state of the relay device in the fault diagnosis mode, determining a fault code based on the state, and determining a fault based on the fault code.

公开(公告)号：US20210345083A1

公开(公告)日：2021-11-04

申请号：US17343319

申请日：2021-06-09

Applicant: Huawei Technologies Co., Ltd.

Inventor： Xuehuan Wang ,  Chao Li ,  Xiujiang Ma

IPC: H04W4/90 ,  H04W24/04 ,  H04W4/44 ,  H04W72/04

Abstract: An emergency call method applied to a vehicle-mounted communications system and the method includes a telematics box that activates a host function. The host function includes controlling a first transmission node and a peripheral connected to the first transmission node. The telematics box is coupled to the first transmission node, and the telematics box may perform data transmission with the first transmission node using the host function. The first transmission node is in a master node mode.

公开(公告)号：US20220337988A1

公开(公告)日：2022-10-20

申请号：US17857310

申请日：2022-07-05

Applicant: Huawei Technologies Co., Ltd.

Inventor： Xuehuan Wang ,  Chao Li ,  Xiujiang Ma

IPC: H04W4/90 ,  H04W4/44 ,  H04W24/04 ,  H04W72/04

Abstract: An emergency call method is applied to a vehicle-mounted communications system. The emergency call method includes a telematics box activating a host function. The host function includes controlling a first transmission node and a peripheral connected to the first transmission node. The telematics box is connected to the first transmission node, and the telematics box performs data transmission with the first transmission node using the host function. The first transmission node is in a master node mode.

公开(公告)号：US11388576B2

公开(公告)日：2022-07-12

申请号：US17343319

申请日：2021-06-09

Applicant: Huawei Technologies Co., Ltd.

Inventor： Xuehuan Wang ,  Chao Li ,  Xiujiang Ma

IPC: H04W4/90 ,  H04W4/44 ,  H04W24/04 ,  H04W72/04 ,  H04W76/50

Abstract: An emergency call method applied to a vehicle-mounted communications system and the method includes a telematics box that activates a host function. The host function includes controlling a first transmission node and a peripheral connected to the first transmission node. The telematics box is coupled to the first transmission node, and the telematics box may perform data transmission with the first transmission node using the host function. The first transmission node is in a master node mode.