公开(公告)号：US20170070224A1

公开(公告)日：2017-03-09

申请号：US15354488

申请日：2016-11-17

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Zhen CAO ,  Yunfeng LIU ,  Yanzhong ZHANG

IPC: H03K17/567 ,  H03K7/08 ,  H03B28/00 ,  H03K4/08

CPC classification number: H03K17/567 ,  G01R31/026 ,  H03B28/00 ,  H03K4/085 ,  H03K7/08 ,  H03K17/08122 ,  H03K17/122 ,  H03K17/162 ,  H03K17/18

Abstract: A wave loss detection circuit includes: an anode of the diode receives a first drive signal, and a cathode of the diode is connected to a first end of the first resistor; a second end of the first resistor is connected to a first end of the first energy storage unit, a first end of the second resistor, and a first input end of the comparison unit; a second end of the first energy storage unit and a second end of the second resistor are connected to a ground level, and a resistance of the first resistor is less than a resistance of the second resistor; a second input end of the comparison unit is configured to receive a threshold voltage, and if a voltage signal received by the first input end is less than the threshold voltage, which indicates that a wave loss occurs in the first drive signal.

Abstract translation: 波浪损失检测电路包括：二极管的阳极接收第一驱动信号，二极管的阴极连接到第一电阻器的第一端; 第一电阻器的第二端连接到第一能量存储单元的第一端，第二电阻器的第一端和比较单元的第一输入端; 第一能量存储单元的第二端和第二电阻器的第二端连接到地电平，并且第一电阻器的电阻小于第二电阻器的电阻; 比较单元的第二输入端被配置为接收阈值电压，并且如果由第一输入端接收的电压信号小于阈值电压，其指示在第一驱动信号中发生波浪损耗。

公开(公告)号：US20210391709A1

公开(公告)日：2021-12-16

申请号：US17446492

申请日：2021-08-31

Applicant: Huawei Technologies Co., Ltd.

Inventor： Xun WANG ,  Zhen CAO ,  Yongbing GAO

IPC: H02H7/122 ,  H02H1/00 ,  H02M7/44 ,  H02H9/02 ,  H02M3/04

Abstract: A breaker apparatus and an inverter system are configured to disconnect an electrical connection when a fault occurs in a protected circuit. The breaker apparatus is connected in series in a protected circuit, and is configured to disconnect the electrical connection when a fault occurs in the protected circuit. The breaker apparatus includes a first branch, and a second branch. The first branch includes an overcurrent-automatic-disconnection unit and a first current limiting unit that are connected in series, where the overcurrent-automatic-disconnection unit is configured to be automatically disconnected when a current flowing through the overcurrent-automatic-disconnection unit exceeds a breaking current threshold. The a second branch is configured to be open or closed under control of the controller. The controller is configured to control the first controllable switch unit to be closed when the protected circuit operates normally, and control the first controllable switch unit to be open when a fault occurs in the protected circuit.

公开(公告)号：US20210135944A1

公开(公告)日：2021-05-06

申请号：US17145932

申请日：2021-01-11

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Nagesh S ,  Zhen CAO ,  Jianjian ZHU

IPC: H04L12/24 ,  H04L12/707 ,  H04L29/06

Abstract: This application provides example data transmission methods and corresponding example devices. One example method includes sending, by a first device, a first packet to a second device, where the first packet includes transmission policy negotiation information, and where the transmission policy negotiation information is used to negotiate a transmission policy used when the second device uses a multipath connection. The first device can then receive a second packet from the second device, where the second packet includes first policy information, and where the first policy information indicates a transmission policy used when the second device uses the multipath connection. The first device can then transmit data with the second device based on the first policy information by using a transmission policy corresponding to the first policy information.

公开(公告)号：US20130286854A1

公开(公告)日：2013-10-31

申请号：US13927891

申请日：2013-06-26

Applicant: Huawei Technologies Co., Ltd.

Inventor： Zhen CAO ,  Shi TANG ,  Jun PAN ,  Zhijian SUN ,  Hua SHEN

IPC: H04L12/24

CPC classification number: H04L41/0645 ,  H04L61/103 ,  H04L61/2046 ,  H04L61/2069

Abstract: The present invention discloses a method and network device for detecting IP address conflict. The method for detecting IP address conflict comprises: collecting all the ARP entries from a broadcasting network segment; and carrying out a data check on the ARP entries collected, and determining that there is an IP address conflicted when it is detected that there are ARP entries with the same IP address but different media access control (MAC) addresses. The network device includes a collecting module and a detecting module. The present invention may achieve the function of IP address conflict detection in a broadcasting network segment by employing one or several network devices and uses the ARP flexibly. The outer appearance of the ARP protocol is not changed, and the other devices in the broadcast network segment do not need to modify the protocol or provide special function support.

Abstract translation: 本发明公开了一种用于检测IP地址冲突的方法和网络设备。 IP地址冲突检测方法包括：从广播网段收集所有ARP表项; 并对收集到的ARP表项进行数据检查，并且当检测到存在具有相同IP地址但不同的媒体访问控制（MAC）地址的ARP条目时，确定存在IP地址冲突。 网络设备包括收集模块和检测模块。 本发明可以通过采用一个或多个网络设备实现广播网段中IP地址冲突检测的功能，并灵活使用ARP。 ARP协议的外观不改变，广播网段中的其他设备不需要修改协议或提供特殊功能支持。

公开(公告)号：US20220060406A1

公开(公告)日：2022-02-24

申请号：US17379408

申请日：2021-07-19

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Rahul Arvind JADHAV ,  Rabi Narayan SAHOO ,  Zhen CAO

IPC: H04L12/727 ,  G06F16/901 ,  H04L12/755 ,  H04L12/707 ,  H04L12/721 ,  H04L12/753 ,  H04W84/18 ,  H04L12/751 ,  H04L12/703

Abstract: The present disclosure relates to apparatus and methods for route invalidation. In one example method, a common ancestor node of a network determines switching of a parent node of a node based on an update message received from the node using a new routing path established based on the switching of the parent node. The common ancestor node generates a No-Path message based on the update message. The No-Path message is for invalidating a previous routing path associated with the node on the switching of the parent node. The update message comprises at least one bit authorizing generation of the No-Path message by the common ancestor node. The at least one bit is placed in a transit information option in the update message.

公开(公告)号：US20200304240A1

公开(公告)日：2020-09-24

申请号：US16899046

申请日：2020-06-11

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Baicheng FU ,  Zhen CAO ,  Ke JIN ,  Fei ZHENG

IPC: H04L1/18 ,  H04L1/00 ,  H04L29/06 ,  H04L29/08

Abstract: An Internet of Things data transmission method includes sending, by a terminal device, a first data request to a server, and continuously receiving, by the terminal device, N data packets from the server. The first data request instructs the server to continuously send a plurality of data packets. The first data request includes a quantity N of data packets, that the terminal device is capable of continuously receiving, and a time interval for sending two consecutive data packets, where N is an integer greater than 1. The N data packets include at least one non-confirmable Constrained Application Protocol (NON) data packet, a sending time interval between two consecutive data packets in the N data packets and the at least one NON data packet indicates that sending a receiving response from the terminal device to the server is unnecessary.

公开(公告)号：US20190306048A1

公开(公告)日：2019-10-03

申请号：US16445805

申请日：2019-06-19

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Rahul Arvind JADHAV ,  Rabi Narayan SAHOO ,  Zhen CAO

IPC: H04L12/727 ,  H04L12/755 ,  G06F16/901 ,  H04L12/707 ,  H04L12/721

Abstract: Apparatus and method for optimized route invalidation using modified no-path DAO signaling are disclosed. According to the present invention, a node switching its current parent is adapted to send a regular Destination Oriented Directed Acyclic Graph (DODAG) Advertisement Object (DAO) message. Using the changed signaling, the common ancestor node generates an NPDAO on behalf of the switching node on receiving a refreshed DAO from an alternate path. The common ancestor node according to the present invention reuses a same PathSequence from the regular DAO based on which the NPDAO gets generated. The common ancestor node detects routing anomaly using next hop mismatch on reception of the DAO to generate the NPDAO on behalf of the target node. The No-Path DAO traverses downward/downstream along the previous path, unlike any other DAO messages traverses upstream according to convention approaches. The present invention provides a new signaling mechanism for route invalidation in constrained networks.