公开(公告)号：US11134496B2

公开(公告)日：2021-09-28

申请号：US16543962

申请日：2019-08-19

Applicant: EXFO INC.

Inventor： Martin Levesque ,  Robert Matesevac ,  Eric Carignan

IPC: H04W24/02 ,  H04W72/04 ,  H04W24/10 ,  H04B10/2575 ,  H04B10/077

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：US11067478B2

公开(公告)日：2021-07-20

申请号：US16776692

申请日：2020-01-30

Applicant: EXFO Inc.

Inventor： Gang He

IPC: G01M11/00

Abstract: There is provided an optical loss testing system for multi-fiber array cables an optical loss test method and a reference method therefor which overcomes at least part of the multi-powermeter uncertainty. A prior calibration step serves to characterize the relative difference in optical power response of the multiple power meters. This relative difference can then be used to correct the optical loss measurement so as to eliminate its effect.

公开(公告)号：US20210176716A1

公开(公告)日：2021-06-10

申请号：US17108716

申请日：2020-12-01

Applicant: EXFO Inc.

Inventor： Marco DI PIETRO ,  Martin LEVESQUE

IPC: H04W52/34 ,  H04W52/36 ,  H04W24/10

Abstract: A method comprising obtaining, via a test system, data from one or more tests of a mobile network having at least one antenna, wherein the data includes a stream of RF samples captured over-the-air or from a Common Public Radio Interface (CPRI) or enhanced CPRI (eCPRI) link; processing the data to detect peaks; performing an analysis of any detected peaks to identify any issues on the mobile network, the analysis including determining a relative power of the detected peaks; and causing display of a user interface that includes a reporting of any the relative power. Determining a relative power includes obtaining a baseline of a subset of the data and comparing an absolute power of the peak to the baseline.

公开(公告)号：US11025524B2

公开(公告)日：2021-06-01

申请号：US16543803

申请日：2019-08-19

Applicant: EXFO Inc.

Inventor： Sylvain Nadeau

IPC: G06F15/173 ,  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.

公开(公告)号：US20210135752A1

公开(公告)日：2021-05-06

申请号：US17088157

申请日：2020-11-03

Applicant: EXFO Inc.

Inventor： Mario L'HEUREUX ,  Stephane PERRON

IPC: H04B10/071 ,  G01M11/00 ,  H04B10/035 ,  G01D5/353 ,  H05B45/20 ,  H05B45/22

Abstract: There is provided an OTDR receive device and an OTDR system comprising an OTDR receive device wherein the OTDR unit and the OTDR receive device are to be connected at opposite ends of an optical fiber link under test. The OTDR receive device comprises means for the OTDR system to detect an established connectivity between the OTDR unit and the OTDR receive device via the optical fiber link under test and a status indicator to notify a user of the receive device of the connectivity status and optionally an OTDR measurement status. Connectivity detection allows to check for continuity between the OTDR unit and the OTDR receive device before launching an OTDR measurement. A user of the OTDR unit does not need to communicate with the user of the OTDR receive device to know when to start the acquisition.

公开(公告)号：US10900866B2

公开(公告)日：2021-01-26

申请号：US16447383

申请日：2019-06-20

Applicant: EXFO Inc.

Inventor： Robert Baribault

IPC: G01M11/08 ,  G01M11/00

Abstract: There is provided an optical-fiber connector endface inspection microscope system comprising optical power measurement capability, wherein optical power measurement is provided via an optical power meter device implemented within an extension unit positioned along an optical path between the inspected optical-fiber connector endface and the optical-fiber connector endface inspection microscope, i.e. between the inspected optical-fiber connector endface and objective optics of the optical-fiber connector endface inspection microscope.

公开(公告)号：US10727940B2

公开(公告)日：2020-07-28

申请号：US16445992

申请日：2019-06-19

Applicant: EXFO Inc.

Inventor： Normand Cyr ,  Gang He ,  Bernard Ruchet

IPC: H04B10/00 ,  H04B10/079

Abstract: Method and systems for characterizing an optical signal propagating along a communication link are disclosed. The signal includes a data-carrying signal contribution, modulated at a symbol frequency, and a noise contribution. The method includes measuring an optical power spectrum of the signal, which includes a data-carrying signal spectrum component and a noise spectrum component. The method also includes determining a measured spectral correlation function within pairs of spectral components of the signal as a function of center frequency of the pairs, the spectral components in each pair being spectrally separated from each other by the symbol frequency. The method further includes obtaining a solution for the data-carrying signal spectrum component based on the measured optical power spectrum, such that a calculated spectral correlation function based on the solution matches the measured spectral correlation function. In some embodiments, the spectral correlation function is measured as a low-frequency beatnote amplitude function.

公开(公告)号：USD865548S1

公开(公告)日：2019-11-05

申请号：US29640238

申请日：2018-03-13

Applicant: EXFO INC.

Designer： Francois Gaucher ,  Olivier Patry

公开(公告)号：US10288524B2

公开(公告)日：2019-05-14

申请号：US15427474

申请日：2017-02-08

Applicant: EXFO INC.

Inventor： Michel Leclerc ,  Mario L'Heureux ,  Stephane Perron

IPC: G01M11/00

Abstract: There is provided a system and a test instrument for identifying or verifying the fiber arrangement and/or the cable type of multi-fiber array cables (such as MPO cables) which employs a light source and a polarity detector at the near end of the multi-fiber array cable under test, and a loopback device at the far end. The polarity detector comprises light presence detectors used to detect which one of the optical fibers of the multi-fiber array cable returns light looped back at the far end and thereby determine the fiber arrangement and/or the cable type of the multi-fiber array cable.

公开(公告)号：USD842144S1

公开(公告)日：2019-03-05

申请号：US29614126

申请日：2017-08-16

Applicant: EXFO INC.

Designer： Michel Blier ,  Patrice Gonay ,  Sebastien Nadeau ,  Pascal Recoura-Massaquant