公开(公告)号：US20220256264A1

公开(公告)日：2022-08-11

申请号：US17730668

申请日：2022-04-27

Applicant: Huawei Technologies Co., Ltd.

Inventor： Xuming Wu ,  Dekun Liu ,  Shiwei Nie

IPC: H04Q11/00 ,  H04J14/02

Abstract: 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.

公开(公告)号：US10601515B2

公开(公告)日：2020-03-24

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 ,  H04B10/27 ,  H04Q11/00

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：US20190207680A1

公开(公告)日：2019-07-04

申请号：US16298677

申请日：2019-03-11

Applicant: Huawei Technologies Co., Ltd.

Inventor： Zhenping Wang ,  Bo Gao ,  Shiwei Nie ,  Lei Jing ,  Xuming Wu

IPC: H04B10/27 ,  H04J14/08 ,  H04L29/12

CPC classification number: H04B10/27 ,  H04J14/08 ,  H04L29/06 ,  H04L61/6022

Abstract: Embodiments of the present invention disclose an EPON communication method, an ONU, and an OLT. The method includes: generating, by an ONU, a first control frame, where the first control frame includes a first data field, and the first data field includes a bandwidth requirement of the at least one LLID; and sending, by the ONU, the first control frame to an OLT. In addition, the OLT generates a second control frame, where the second control frame includes a second data field, and the second data field includes grant information of the at least one LLID; and the OLT sends the second control frame to the ONU. In the embodiments of the present invention, the first control frame may carry bandwidth requirements of a plurality of LLIDs, so that one first control frame can be used to report bandwidth requirements of a plurality of LLIDs.

公开(公告)号：US10129614B2

公开(公告)日：2018-11-13

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: H04J14/02 ,  H04Q11/00 ,  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.