公开(公告)号：US20190045337A1

公开(公告)日：2019-02-07

申请号：US16153455

申请日：2018-10-05

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Jizhong SUN ,  Liang Chen ,  Rui Yue ,  Hui Yan

IPC: H04W4/46 ,  H04W72/12 ,  H04W40/02

CPC classification number: H04W4/46 ,  H04W4/00 ,  H04W40/02 ,  H04W72/1289

Abstract: The present invention provides a vehicle to vehicle (V2V) communication method, a device, and a system, and relates to the field of communications technologies, to resolve a problem that scheduling overheads of physical downlink control channel (PDCCH) information are relatively large in existing V2V communication. The method may include receiving, by a first vehicle terminal, a first SPS configuration parameter that includes a first semi-persistent scheduling (SPS) period and that is sent by the base station. The method may also include receiving first scheduling control information that is used to instruct the first vehicle terminal to perform SPS activation and that is sent by the base station, and sending a V2V data packet to a second vehicle terminal.

公开(公告)号：US10148182B2

公开(公告)日：2018-12-04

申请号：US15785206

申请日：2017-10-16

Applicant: Huawei Technologies Co., Ltd.

Inventor： Jiake Wang ,  Liang Chen

IPC: H02M3/158 ,  H03K17/687 ,  H02M1/32

Abstract: The present disclosure discloses a voltage conversion circuit, including: a first power transistor; a second power transistor, where the second power transistor is cut off when the first power transistor is conductive and is conductive when the first power transistor is cut off; a first energy storage element; a second energy storage element, a bleed module, configured to be coupled to the first power transistor, where when the first power transistor is cut off and a voltage of a source of the first power transistor reaches a source threshold, provide a current path for a current flowing from the source of the first power transistor to the ground. By means of the foregoing, a voltage difference between a drain and the source of the first power transistor can be decreased, thereby reducing a risk of burning out the first power transistor, and avoiding an increase in manufacturing costs.

公开(公告)号：US20140079104A1

公开(公告)日：2014-03-20

申请号：US14082395

申请日：2013-11-18

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Liang Chen ,  Xiaodong Li ,  Fengbin Pan ,  Xueren Yang

IPC: H04M3/00 ,  H04M3/22

CPC classification number: H04M3/007 ,  H04B3/32 ,  H04L12/28 ,  H04M3/2209 ,  H04M3/30 ,  H04M11/062

Abstract: A method for reducing power consumption on an xDSL subscriber board, includes: obtaining a maximum downlink service bandwidth, a downlink signal-to-noise ratio margin in line connection parameters of the user port, and transmission mode information in a line template bound to the user port; determining whether the downlink signal-to-noise ratio margin is larger than a preset value, if yes, reducing a maximum downlink nominal total transmission power; otherwise, configuring the maximum downlink nominal total transmission power as a downlink transmit power in line connection parameters of the current port; calculating a minimum undistorted power supply voltage required by a corresponding line driver of each registered user port under the current configuration of the bound template, comparing minimum undistorted power supply voltage values, to find the largest value; and controlling an output voltage of a power module of a line driver equaling to the largest value.

Abstract translation: 一种用于降低xDSL用户板上的功耗的方法，包括：获得最大下行链路业务带宽，用户端口的线路连接参数中的下行链路信噪比裕度以及绑定到该用户端口的线路模板中的传输模式信息 用户端口 确定下行链路信噪比裕度是否大于预设值，如果是，则降低最大下行标称总发射功率; 否则，将最大下行标称总发射功率配置为当前端口的线路连接参数中的下行发射功率; 计算在绑定模板的当前配置下每个注册用户端口的相应线路驱动器所需的最小未失真电源电压，比较最小未失真电源电压值，以找到最大值; 以及控制等于最大值的线路驱动器的功率模块的输出电压。