Patents by Inventor Dekun LIU
Dekun LIU has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20250026204Abstract: Provided is a two-series spring damping type current collector for subway vehicles including an insulating back plate connected to one side of each of second tooth-shaped plates through a corresponding one of first tooth-shaped plates arranged at two lateral portions of the insulating back plate, and an other side of the second tooth-shaped plates is connected to a mounting plate. One end of the tension steel spring is connected to a first spring connecting piece, an other end of the tension steel spring is connected to a second spring connecting piece, the tension steel spring is internally provided with the rubber block in a shape of cylinder, a diameter of the rubber block is equal to that of an inner cavity of the tension steel spring, a length of the rubber block is equal to that of the tension steel spring in a pre-tightened state.Type: ApplicationFiled: July 15, 2024Publication date: January 23, 2025Applicant: BEIJING JIAOTONG UNIVERSITYInventors: Yongjun LIU, Xingzhi YANG, Dekun XIONG, Jinchao LIU, Yezheng LI
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Patent number: 12149337Abstract: An upstream resource grant method, a device, a passive optical network, and a computer-readable storage medium are provided. The upstream resource grant method includes: obtaining, by an optical line terminal, an upstream grant message on which transformation processing has been performed, wherein a transformation parameter used for the transformation processing includes a physical identity of an optical network unit (ONU); and sending, by the optical line terminal, the upstream grant message on which the transformation processing has been performed, wherein the upstream grant message carries an upstream resource grant indication of the optical network unit, and the upstream resource grant indication indicates an upstream resource granted to the optical network unit. According to this application, an occurrence probability of a rogue ONU phenomenon is reduced, thereby improving service running stability of a PON system.Type: GrantFiled: May 27, 2022Date of Patent: November 19, 2024Assignee: Huawei Technologies Co., Ltd.Inventors: Xuming Wu, Shiwei Nie, Xiaofei Zeng, Dekun Liu, Gang Zheng, Jun Zhou
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Publication number: 20230246741Abstract: A data processing method including receiving a data flow sent by an encoder side, where the data flow is a bit stream on which interleaving encoding is used, the data flow includes synchronization information, and the synchronization information is distributed in the data flow based on a first permutation interval, obtaining, from the data flow, first data information based on a first value interval and a first value length, where the first value interval is equal to the first permutation interval, and a difference between the first value length and a length of the synchronization information is less than or equal to a preset error value, and when a similarity between the first data information and the synchronization information exceeds a preset similarity threshold, performing de-interleaving on the data flow based on a start location of the first data information.Type: ApplicationFiled: March 29, 2023Publication date: August 3, 2023Inventors: Xuming Wu, Xu Wang, Dekun Liu
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Patent number: 11656896Abstract: A remote desktop system includes a primary virtual machine, a plurality of secondary virtual machines, a primary terminal configured to log in to the primary virtual machine, and a secondary terminal configured to log in to a secondary virtual machine. When a user of the primary virtual machine needs to share image data of the primary virtual machine with a user of the secondary terminal for viewing, the primary virtual machine sends the image data to the primary terminal, and then the primary terminal shares the image data with the secondary terminal. This reduces data transmission pressure on a communications network between a virtual machine center and a terminal center.Type: GrantFiled: June 17, 2020Date of Patent: May 23, 2023Assignee: Huawei Cloud Computing Technologies Co., Ltd.Inventors: Xin Dai, Dekun Liu
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Patent number: 11646796Abstract: The present disclosure relates to information transmission methods in a passive optical network (PON) system. One example method includes sending, by an optical line terminal (OLT), a first power range and time indication to an unregistered optical network unit (ONU), where the first power range and the time indication indicate the ONU to send a serial number of the ONU to the OLT at a time indicated by the time indication in case a downlink receive power of the ONU is within the first power range, and receiving, by the OLT, the serial number of the ONU.Type: GrantFiled: April 20, 2022Date of Patent: May 9, 2023Assignee: Huawei Technologies Co., Ltd.Inventors: Dekun Liu, Wei Ling, Zhicheng Ye
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Publication number: 20220294551Abstract: Embodiments of this application provide an upstream resource grant method, a device, a passive optical network, and a computer-readable storage medium. The upstream resource grant method includes: An optical line terminal obtains an upstream grant message on which transformation processing has been performed, where a transformation parameter used for the transformation processing includes a physical identity of an optical network unit (ONU); and the optical line terminal sends the upstream grant message on which the transformation processing has been performed, where the upstream grant message carries an upstream resource grant indication of the optical network unit, and the upstream resource grant indication is used to indicate an upstream resource granted to the optical network unit. The technical solutions provided in the embodiments of this application help reduce an occurrence probability of a rogue ONU phenomenon, and further improve service running stability of a PON system.Type: ApplicationFiled: May 27, 2022Publication date: September 15, 2022Inventors: Xuming WU, Shiwei NIE, Xiaofei ZENG, Dekun LIU, Gang ZHENG, Jun ZHOU
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Publication number: 20220256264Abstract: A communication method, a device, and a system, the method including sending, by an optical line terminal (OLT) of a passive optical network that comprises the OLT and a plurality of optical network units (ONUs), a first downstream frame to the activated ONU using at least one downstream wavelength path, where the OLT and the at least one ONU of the plurality of ONUs communicate with each other using at the least one downstream wavelength path and a plurality of upstream wavelength paths, the plurality of ONUs comprises an activated ONU, wherein the first downstream frame comprises a first path identifier used to identify a first upstream wavelength path, and the first upstream wavelength path is one of the plurality of upstream wavelength paths, and receiving, by the OLT, upstream service data from the activated ONU using the first upstream wavelength path.Type: ApplicationFiled: April 27, 2022Publication date: August 11, 2022Inventors: Xuming Wu, Dekun Liu, Shiwei Nie
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Publication number: 20220255624Abstract: The present disclosure relates to information transmission methods in a passive optical network (PON) system. One example method includes sending, by an optical line terminal (OLT), a first power range and time indication to an unregistered optical network unit (ONU), where the first power range and the time indication indicate the ONU to send a serial number of the ONU to the OLT at a time indicated by the time indication in case a downlink receive power of the ONU is within the first power range, and receiving, by the OLT, the serial number of the ONU.Type: ApplicationFiled: April 20, 2022Publication date: August 11, 2022Inventors: Dekun LIU, Wei LING, Zhicheng YE
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Patent number: 11368223Abstract: The present disclosure relates to message transmission methods in a PON system. One example method includes sending, by an optical line terminal (OLT), a first message to an unregistered optical network unit (ONU), where the first message includes at least one piece of indication message, and one piece of indication message of the at least one piece of indication message indicates a first power range and a first time range associated with the first power range, and receiving, by the OLT in the first time range, a registration message sent by the ONU, where a downstream receive power of the ONU falls within the first power range.Type: GrantFiled: July 22, 2020Date of Patent: June 21, 2022Assignee: Huawei Technologies Co., Ltd.Inventors: Dekun Liu, Wei Ling, Zhicheng Ye
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Patent number: 11245490Abstract: A data encoding method and apparatus and a data decoding method and apparatus in a passive optical network (PON) system include collecting N data blocks at a physical coding sublayer and generating valid data by combining the N data blocks, generating a payload, where the payload includes the valid data, performing FEC encoding on the payload to generate a check part, and generating a codeword structure. The synchronization header may be located at the head or the tail of the codeword structure.Type: GrantFiled: June 1, 2020Date of Patent: February 8, 2022Assignee: HUAWEI TECHNOLOGIES CO., LTD.Inventors: Lei Jing, Bo Gao, Shiwei Nie, Dekun Liu
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Patent number: 10939190Abstract: The present invention discloses a passive optical network communications method: reporting, by an optical network unit, ONU, a calibration record of the ONU, where the calibration record includes an ID of a calibrated wavelength channel; sending a first message to the ONU when the OLT determines, according to the calibration record, that a target wavelength channel ID corresponding to a target wavelength channel to which the ONU needs to switch is not in the calibration record, where the first message includes a forced wavelength switching flag; and instructing the ONU to switch to the calibrated target wavelength channel. In this way, the ONU can implement wavelength switching quickly after calibrating a new wavelength channel so as to perform data communication over the calibrated new wavelength channel.Type: GrantFiled: October 18, 2018Date of Patent: March 2, 2021Assignee: Huawei Technologies Co., Ltd.Inventors: Bo Gao, Dekun Liu, Xuming Wu, Jianhe Gao
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Publication number: 20200350992Abstract: The present disclosure relates to message transmission methods in a PON system. One example method includes sending, by an optical line terminal (OLT), a first message to an unregistered optical network unit (ONU), where the first message includes at least one piece of indication message, and one piece of indication message of the at least one piece of indication message indicates a first power range and a first time range associated with the first power range, and receiving, by the OLT in the first time range, a registration message sent by the ONU, where a downstream receive power of the ONU falls within the first power range.Type: ApplicationFiled: July 22, 2020Publication date: November 5, 2020Inventors: Dekun LIU, Wei LING, Zhicheng YE
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Publication number: 20200319910Abstract: This application discloses a remote desktop system, including a primary virtual machine, a plurality of secondary virtual machines, a primary terminal configured to log in to the primary virtual machine, and a secondary terminal configured to log in to a secondary virtual machine. When a user of the primary virtual machine needs to share image data of the primary virtual machine with a user of the secondary terminal for viewing, the primary virtual machine sends the image data to the primary terminal, and then the primary terminal shares the image data with the secondary terminal. This reduces data transmission pressure on a communications network between a virtual machine center and a terminal center.Type: ApplicationFiled: June 17, 2020Publication date: October 8, 2020Applicant: HUAWEI TECHNOLOGIES CO., LTD.Inventors: Xin Dai, Dekun Liu
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Publication number: 20200295870Abstract: A data encoding method and apparatus and a data decoding method and apparatus in a passive optical network (PON) system include collecting N data blocks at a physical coding sublayer and generating valid data by combining the N data blocks, generating a payload, where the payload includes the valid data, performing FEC encoding on the payload to generate a check part, and generating a codeword structure. The synchronization header may be located at the head or the tail of the codeword structure.Type: ApplicationFiled: June 1, 2020Publication date: September 17, 2020Inventors: Lei Jing, Bo Gao, Shiwei Nie, Dekun Liu
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Patent number: 10439724Abstract: A passive optical network (PON) includes a first optical line terminal (OLT), a second OLT, and an optical network unit (ONU). The first OLT sends an equalization delay change message to the ONU, wherein the equalization delay change message includes an equalization delay, an upstream channel ID and a downstream channel ID corresponding to the equalization delay. The ONU receives the equalization delay change message. When the ONU tunes from the first OLT to the second OLT, the ONU obtains the equalization delay for upstream transmission according to the upstream channel ID and the downstream channel ID.Type: GrantFiled: June 25, 2018Date of Patent: October 8, 2019Assignee: Futurewei Technologies, Inc.Inventors: Xuming Wu, Yuanqiu Luo, Dekun Liu, Jianhe Gao
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Patent number: 10419122Abstract: A multiplexer/demultiplexer and a passive optical network system are provided. The multiplexer/demultiplexer includes N optical multiplexing/demultiplexing modules. The optical multiplexing/demultiplexing modules multiplex signals with different wavelengths from a plurality of ports to a same port, or demultiplex signals with different wavelengths from one port to different ports. The N optical multiplexing/demultiplexing modules correspond to the signals with different wavelengths. In the optical multiplexing/demultiplexing modules, a negative dispersion amount and an insertion loss of an Mth optical multiplexing/demultiplexing module are less than those of an (M+1)th optical multiplexing/demultiplexing module, where N is a positive integer, and M is a positive integer less than or equal to N. The multiplexer/demultiplexer and the passive optical network system increase an optical power budget between an optical transmitter and an optical transceiver.Type: GrantFiled: September 3, 2018Date of Patent: September 17, 2019Assignee: HUAWEI TECHNOLOGIES CO., LTD.Inventors: Dekun Liu, Shengping Li
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Publication number: 20190052940Abstract: The present invention discloses a passive optical network communications method, reporting, by an optical network unit, ONU, a calibration record of the ONU, where the calibration record includes an ID of a calibrated wavelength channel; sending a first message to the ONU when the OLT determines, according to the calibration record, that a target wavelength channel ID corresponding to a target wavelength channel to which the ONU needs to switch is not in the calibration record, where the first message includes a forced wavelength switching flag; and instructing the ONU to switch to the calibrated target wavelength channel. In this way, the ONU can implement wavelength switching quickly after calibrating a new wavelength channel so as to perform data communication over the calibrated new wavelength channel.Type: ApplicationFiled: October 18, 2018Publication date: February 14, 2019Inventors: Bo GAO, Dekun LIU, Xuming WU, Jianhe GAO
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Publication number: 20190036609Abstract: A multiplexer/demultiplexer and a passive optical network system are provided. The multiplexer/demultiplexer includes N optical multiplexing/demultiplexing modules. The optical multiplexing/demultiplexing modules multiplex signals with different wavelengths from a plurality of ports to a same port, or demultiplex signals with different wavelengths from one port to different ports. The N optical multiplexing/demultiplexing modules correspond to the signals with different wavelengths. In the optical multiplexing/demultiplexing modules, a negative dispersion amount and an insertion loss of an Mth optical multiplexing/demultiplexing module are less than those of an (M+1)th optical multiplexing/demultiplexing module, where N is a positive integer, and M is a positive integer less than or equal to N. The multiplexer/demultiplexer and the passive optical network system increase an optical power budget between an optical transmitter and an optical transceiver.Type: ApplicationFiled: September 3, 2018Publication date: January 31, 2019Inventors: Dekun LIU, Shengping LI
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Patent number: 10129614Abstract: The present invention discloses a passive optical network communications method: reporting, by an optical network unit, ONU, a calibration record of the ONU, where the calibration record includes an ID of a calibrated wavelength channel; sending a first message to the ONU when the OLT determines, according to the calibration record, that a target wavelength channel ID corresponding to a target wavelength channel to which the ONU needs to switch is not in the calibration record, where the first message includes a forced wavelength switching flag; and instructing the ONU to switch to the calibrated target wavelength channel. In this way, the ONU can implement wavelength switching quickly after calibrating a new wavelength channel so as to perform data communication over the calibrated new wavelength channel.Type: GrantFiled: February 13, 2017Date of Patent: November 13, 2018Assignee: Huawei Technologies Co., Ltd.Inventors: Bo Gao, Dekun Liu, Xuming Wu, Jianhe Gao
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Publication number: 20180302164Abstract: A passive optical network (PON) includes a first optical line terminal (OLT), a second OLT, and an optical network unit (ONU). The first OLT sends an equalization delay change message to the ONU, wherein the equalization delay change message includes an equalization delay, an upstream channel ID and a downstream channel ID corresponding to the equalization delay. The ONU receives the equalization delay change message. When the ONU tunes from the first OLT to the second OLT, the ONU obtains the equalization delay for upstream transmission according to the upstream channel ID and the downstream channel ID.Type: ApplicationFiled: June 25, 2018Publication date: October 18, 2018Inventors: Xuming Wu, Yuanqiu Luo, Dekun Liu, Jianhe Gao