公开(公告)号：US20190052940A1

公开(公告)日：2019-02-14

申请号：US16164309

申请日：2018-10-18

Applicant: Huawei Technologies Co., Ltd.

Inventor： Bo GAO ,  Dekun LIU ,  Xuming WU ,  Jianhe GAO

IPC: H04Q11/00 ,  H04J14/02 ,  H04B10/073

Abstract: 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.

公开(公告)号：US20230379072A1

公开(公告)日：2023-11-23

申请号：US18364545

申请日：2023-08-03

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Jianlin XUE ,  Jingfei LYU ,  Xuming WU

IPC: H04J3/06 ,  H04J14/02 ,  H04Q11/00

CPC classification number: H04J3/0661 ,  H04J14/0227 ,  H04Q11/0067

Abstract: This application discloses a communication method and a device, and belongs to the communication field. The method includes: generating a passive optical network PON data frame, where the PON data frame includes an overhead area, the overhead area includes at least a part of a first timestamp, and the first timestamp is for time synchronization; and sending the PON data frame. This application can reduce operation overheads for parsing a PON data frame. This application is for time synchronization between an OLT and an ONU.

公开(公告)号：US20220224429A1

公开(公告)日：2022-07-14

申请号：US17707534

申请日：2022-03-29

Applicant: Huawei Technologies Co., Ltd.

Inventor： Shengping LI ,  Lei JING ,  Jun ZHOU ,  Xuming WU

IPC: H04J3/06 ,  H04J14/02

Abstract: A status control method, applied to an optical network unit (ONU) or an optical network terminal (ONT) of a passive optical network (PON) includes: receiving a first downlink data frame, where the first downlink data frame includes data of N different rates and indication information, the indication information includes length information of data of each rate in the first downlink data frame, and N≥2; determining length information of first data in the data of the N different rates, where a rate of the first data is higher than a working rate of a clock and data recovery (CDR) module; and generating control information based on the length information of the first data, to control the CDR module to be in a specified state within a period of time corresponding to the length information of the first data.

公开(公告)号：US20220294551A1

公开(公告)日：2022-09-15

申请号：US17827467

申请日：2022-05-27

Applicant: Huawei Technologies Co., Ltd.

Inventor： Xuming WU ,  Shiwei NIE ,  Xiaofei ZENG ,  Dekun LIU ,  Gang ZHENG ,  Jun ZHOU

IPC: H04J14/02 ,  H04L9/40

Abstract: 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.

公开(公告)号：US20190116404A1

公开(公告)日：2019-04-18

申请号：US16218665

申请日：2018-12-13

Applicant: Huawei Technologies Co., Ltd.

Inventor： Jianyu ZHENG ,  Shengping LI ,  Xuming WU

IPC: H04Q11/00

Abstract: Embodiments relate to the field of PON technologies, and provide a method, apparatus, and system. The method includes: receiving capability information that is sent by an ONU by using a first preamble; calculating a tap coefficient based on the received first preamble if the capability information indicates that the ONU has an equalization capability; sending the tap coefficient to the ONU, where the ONU updates a tap coefficient of a first equalizer in the ONU based on the received tap coefficient, and when subsequently sending upstream data, sends, by using a second preamble, the upstream data equalized by using the first equalizer, and a length of the second preamble is less than a length of the first preamble; receiving the upstream data; and equalizing the received upstream data based on the second preamble by using a second equalizer in an OLT. In this way, upstream overheads can be reduced.

公开(公告)号：US20230353279A1

公开(公告)日：2023-11-02

申请号：US18347829

申请日：2023-07-06

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Xuming WU

IPC: H04L1/00 ,  H04B10/27

CPC classification number: H04L1/0057 ,  H04B10/27 ,  H04L1/0061

Abstract: This application provides a method for uplink FEC encoding. On example method includes: obtaining a grant length of an uplink slot, where the grant length is equal to a product of a grant quantity of the uplink slot and a grant granularity, and the grant granularity is a grant granularity supported by a device to which the uplink slot belongs; and obtaining an FEC codeword of uplink data based on the grant length and an LDPC coding scheme, where the FEC codeword includes an LDPC codeword data bit, and in the LDPC coding scheme, N times the LDPC codeword data bit is divisible by the grant granularity, where N is a positive integer greater than or equal to 1.

公开(公告)号：US20180343065A1

公开(公告)日：2018-11-29

申请号：US16054388

申请日：2018-08-03

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Shengping LI ,  Zhicheng YE ,  Xuming WU

IPC: H04B10/516 ,  H04Q11/00

CPC classification number: H04B10/516 ,  H04B10/27 ,  H04Q11/0005 ,  H04Q11/0067 ,  H04Q2011/0045 ,  H04Q2011/0079

Abstract: Embodiments of the present invention disclose a method for switching a modulation format of a passive optical network, an apparatus, and a system. The method includes: separately delivering, by an OLT, a registration message to an optical network unit in all supported upstream modulation formats and/or downstream modulation formats; receiving, by the OLT, a first message reported by the optical network unit, where the first message includes an upstream modulation format capability and/or a downstream modulation format capability; and determining, by the OLT, a target upstream modulation format and/or a target downstream modulation format of the optical network unit according to the first message, and instructing the optical network unit to switch to the target upstream modulation format and/or the target downstream modulation format. Therefore, in a PON system that supports a plurality of modulation formats, a modulation format reporting capability of the ONU is improved.

公开(公告)号：US20170155982A1

公开(公告)日：2017-06-01

申请号：US15431390

申请日：2017-02-13

Applicant: Huawei Technologies Co., Ltd.

Inventor： Bo GAO ,  Dekun LIU ,  Xuming WU ,  Jianhe GAO

IPC: H04Q11/00 ,  H04J14/02

CPC classification number: H04Q11/0005 ,  H04B10/073 ,  H04J14/02 ,  H04J14/0242 ,  H04Q11/00 ,  H04Q11/0062 ,  H04Q2011/0016 ,  H04Q2011/0086

Abstract: 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.