公开(公告)号：US20220128434A1

公开(公告)日：2022-04-28

申请号：US17451397

申请日：2021-10-19

Applicant: EXFO Inc.

Inventor： Stephane PERRON ,  Michel LECLERC ,  Pascal GOSSELIN-BADAROUDINE

IPC: G01M11/00

Abstract: There are provided methods and systems for testing the continuity of optical fiber links under test and/or a fiber arrangement, polarity or mapping of optical fiber connections within optical devices under test using the backscattering pattern as a signature. The device under test may comprises a single fiber, a duplex link, a multifiber cable or another multi-port device such as a backplane device.

公开(公告)号：US20220035104A1

公开(公告)日：2022-02-03

申请号：US17443496

申请日：2021-07-27

Applicant: EXFO Inc.

Inventor： Jean Filion ,  Olivier Cote

IPC: G02B6/38 ,  G02B21/00

Abstract: There is provided an adapter tip to be employed with an optical-fiber connector endface inspection microscope and an optical-fiber connector endface inspection microscope system suitable for imaging the optical-fiber endface of an angled-polished optical-fiber connector deeply recessed within a connector adapter. The adapter tip or microscope system comprises a relay optical system comprising a Rhomboid prism. The Rhomboid prism being disposed so as to receive light reflected from said optical-fiber endface during inspection and laterally shift the light beam reflected from the angled-polished optical-fiber endface.

公开(公告)号：US11125648B2

公开(公告)日：2021-09-21

申请号：US16892767

申请日：2020-06-04

Applicant: EXFO Inc.

Inventor： Stephane Perron

IPC: G01M11/00 ,  H04B10/071

Abstract: There is provided a method, system and computer program for detecting duplicate OTDR measurements performed on a same fiber. It is determined whether OTDR traces are likely to have been acquired over the same optical fiber link by comparing the backscattering pattern associated with a given fiber span along the OTDR traces, which corresponds to a continuous optical fiber section.

公开(公告)号：US20210273722A1

公开(公告)日：2021-09-02

申请号：US17183415

申请日：2021-02-24

Applicant: EXFO Inc.

Inventor： Gang HE ,  Daniel GARIEPY

IPC: H04B10/079 ,  H04B10/073

Abstract: There is herein provided a method for measuring the GOSNR that can be implemented using commercial-grade transceivers and which accounts for linear optical impairments (e.g. PMD, PDL and CD) and transceiver intrinsic impairments. The method may be implemented using an Optical Spectrum Analyzer (OSA) and either the system transceivers or other commercial-grade transceivers. The proposed measurement method is based on mixed optical and electronic technologies, using an OSA and a transceiver pair. By measuring a signal quality metric Qm and the OSNR under varied power and ASE noise conditions, a constant value RBW that relates the GOSNR to the signal quality metric Qm is derived. The GOSNR is then obtained from these results.

公开(公告)号：US10936396B2

公开(公告)日：2021-03-02

申请号：US16284585

申请日：2019-02-25

Applicant: EXFO Inc.

Inventor： Marc Rondeau ,  Michael Proctor

IPC: G06F11/00 ,  G06F11/07 ,  G06F11/22

Abstract: A network testing system includes one or more test devices each including a media-specific testing module and a processing device with a network interface, wherein the processing device is configured to test a network with the media-specific testing module; one or more servers configured to receive test results from the test of the network either directly from the one or more test devices or an intermediate data source communicatively coupled to the one or more test devices; and a validator module executed on the one or more servers configured to perform automated post-processing on the test results to compare the test results to a pre-defined Method of Procedure (MOP), to auto-correct one or more errors in the test results, and to provide a report based on the comparison.

公开(公告)号：US20210011890A1

公开(公告)日：2021-01-14

申请号：US16669033

申请日：2019-10-30

Applicant: EXFO Inc.

Inventor： Maha Mdini ,  Justin Whatley ,  Sylvain Nadeau

IPC: G06F16/21 ,  G06F16/22 ,  H04L12/24

Abstract: An embodiment may involve obtaining a set of data records including features characterizing operational aspects of a communication network. Each data record may include a feature vector and performance metrics of the communication network. Each feature vector may include a multiple elements corresponding to feature-value pairs. A first statistical analysis may be applied to the set of data records and their performance metrics to identify major contributors to degraded network performance. A second statistical analysis may be applied to identify elements that negatively influence the major contributors, and to discriminate between additive effects and incompatibilities as the source of negative influence. For each major contributor, a hierarchical dependency tree may be constructed with the major contributor as the root node and influencer elements as other nodes. Redundant dependencies may be removed, mutually dependent influencer elements grouped, and only the longest edges retained, in order to create dependency graph.

公开(公告)号：US10735109B1

公开(公告)日：2020-08-04

申请号：US16739812

申请日：2020-01-10

Applicant: EXFO Inc.

Inventor： Dominic Lapierre ,  Luc Germain ,  Robert Matesevac

IPC: H04W24/00 ,  H04B15/04 ,  H04L12/26 ,  G01R23/16 ,  H04B17/30 ,  H04W24/02

Abstract: Systems and methods e to automatically analyze and display results of tests of a link include obtaining data from one or more tests of a link, wherein the data includes samples for Antenna Carriers (AxC) for one or more AxCs auto-detected on the link; processing the data to detect peaks on any of the auto-detected AxCs on the link; performing an analysis of any detected peaks to identify any issues on the link; and causing display of a user interface that includes a reporting of any identified issues with the user interface including a display of the identified issues and a spectrum graph.

公开(公告)号：US10659178B2

公开(公告)日：2020-05-19

申请号：US16159013

申请日：2018-10-12

Applicant: EXFO Inc.

Inventor： Jean-Sébastien Martel ,  Stéphane Perron

IPC: H04B17/15 ,  H04B10/2575 ,  H04B10/071 ,  H04B17/29 ,  G01M11/00 ,  G02B6/35 ,  G02B6/122

Abstract: Fronthaul monitoring systems and methods include a Radio Frequency (RF) analysis module configured to receive an optical RF signal for RF testing thereof; a fiber monitoring module configured to perform fiber monitoring testing; an optical switch configured to switch a port connected to the RF analysis module and the fiber monitoring module between one or more Remote Radio Heads (RRH); and a test coordinator software module configured to coordinate the RF testing and the fiber monitoring testing. The optical RF signal is at different wavelengths than a fiber test signal for the fiber monitoring testing, such that the RF testing and the fiber monitoring testing can be performed concurrently.

公开(公告)号：US20200068552A1

公开(公告)日：2020-02-27

申请号：US16543962

申请日：2019-08-19

Applicant: EXFO INC.

Inventor： MARTIN LEVESQUE ,  ROBERT MATESEVAC ,  ERIC CARIGNAN

IPC: H04W72/04 ,  H04W24/10 ,  H04B10/077 ,  H04B10/2575

Abstract: A device and method for providing a mapping of antenna data into antenna containers within a common public radio interface (CPRI) signal exchanged between a radio equipment controller (REC) and at least one radio equipment (RE) are described. The method comprises finding a location of activity within the multiple CPRI basic frames; extracting a candidate antenna signal from the multiple CPRI basic frames starting from the location using a set of mapping parameters used in a standard antenna signal; comparing a candidate frequency content of the candidate antenna signal to a standard frequency content of the standard antenna signal to derive a validity score; associating the set of mapping parameters of the standard antenna signal to the observed mapping if the validity score meets predetermined conditions; and causing a report of the observed mapping.

公开(公告)号：US20200059428A1

公开(公告)日：2020-02-20

申请号：US16543803

申请日：2019-08-19

Applicant: EXFO Inc.

Inventor： Sylvain NADEAU

IPC: H04L12/26 ,  H04L29/06

Abstract: A telecommunications network and service QoE assessment method and system comprising calculating a service score; calculating a network score; calculating a global score by combining the service score and the network score, the global score being for a quality of experience of a user on the network.