-
公开(公告)号：US12015886B2
公开(公告)日：2024-06-18
申请号：US17495076
申请日：2021-10-06
Applicant: Nokia Solutions and Networks OY
Inventor： Doutje Van Veen , Vincent Houtsma , Amitkumar Mahadevan , Edward Harstead
IPC: H04Q11/00 , H04B10/27 , H04B10/293 , H04B10/564 , H04J14/02
CPC classification number: H04Q11/0067 , H04B10/27 , H04B10/293 , H04B10/564 , H04J14/0282 , H04Q2011/0049
Abstract: Various embodiments of the disclosed PON system enable approximate leveling of the optical-modulation amplitudes in a sequence of optical bursts received by a system's OLT from a plurality of ONUs. Some embodiments additionally enable approximate leveling of the average optical power, received at the OLT from different ONUs, in such a sequence. Some embodiments may rely on control messaging between the OLT and ONUs to perform one or both types of leveling. The disclosed leveling may advantageously provide an effective tool for optimizing upstream transmission for high-speed TDM-PONs.
-
12.发明授权公开(公告)号：US11902720B2
公开(公告)日：2024-02-13
申请号：US17683870
申请日：2022-03-01
Applicant: Nokia Solutions and Networks Oy
Inventor： Doutje Van Veen , Amitkumar Mahadevan , Vincent Houtsma
CPC classification number: H04Q11/0062 , H04B10/27 , H04J3/16 , H04Q2011/0064
Abstract: An optical line terminal (OLT) operating within a multi-rate PON is configured to perform downstream timeslot scheduling among an associated number of ONUs so as to minimize the change in information rate from one scheduled ONU timeslot to the next. In this manner, the clock recovery component at each ONU is best able to follow the change in information rates, remaining locked on the system clock regardless of the specific implementation of the clock and data recovery (CDR) functionality at a given ONU. The OLT may schedule timeslot assignments that span a pair of adjacent parts (referred to as a two-part cycle), with the first part having timeslots assigned from the lowest information rate (e.g., NRZ) to the highest (e.g., PAM4) and the second part's timeslots assigned in the reverse order; that is, from the highest to the lowest information rate.
-
13.发明公开公开(公告)号：US20230379607A1
公开(公告)日：2023-11-23
申请号：US17746658
申请日：2022-05-17
Applicant: Nokia Solutions and Networks Oy
Inventor： Doutje Van Veen , Amitkumar Mahadevan , Vincent Houtsma
IPC: H04Q11/00 , H04B10/073 , H04B10/2557
CPC classification number: H04Q11/0067 , H04B10/0731 , H04B10/2557 , H04Q2011/0083
Abstract: A method and apparatus is proposed for accurately evaluating the performance of optical transmitters under test conditions (such as high bit-rate modulation formats) that compromise the operability of standard test equipment used for this purpose. The proposed apparatus and method are similar to the elements associated with existing testing standards based on an optical eye diagram, with an important distinction that allows for accurate measurements of the transmitter's performance to be made. In particular, the sampling point for collecting eye diagram data samples in the inventive arrangement is shifted by half a period with respect to the conventional mid-eye sampling point, eliminating the need to include representative reference equalizer in the test equipment and providing an evaluation not influenced by the test equipment, resulting in a more accurate measurement of transmitter-related distortions.
-
14.发明公开公开(公告)号：US20230283933A1
公开(公告)日：2023-09-07
申请号：US17683870
申请日：2022-03-01
Applicant: Nokia Solutions and Networks Oy
Inventor： Doutje Van Veen , Amitkumar Mahadevan , Vincent Houtsma
CPC classification number: H04Q11/0062 , H04B10/27 , H04J3/16 , H04Q2011/0064
Abstract: An optical line terminal (OLT) operating within a multi-rate PON is configured to perform downstream timeslot scheduling among an associated number of ONUs so as to minimize the change in information rate from one scheduled ONU timeslot to the next. In this manner, the clock recovery component at each ONU is best able to follow the change in information rates, remaining locked on the system clock regardless of the specific implementation of the clock and data recovery (CDR) functionality at a given ONU. The OLT may schedule timeslot assignments that span a pair of adjacent parts (referred to as a two-part cycle), with the first part having timeslots assigned from the lowest information rate (e.g., NRZ) to the highest (e.g., PAM4) and the second part's timeslots assigned in the reverse order; that is, from the highest to the lowest information rate.
-
公开(公告)号：US20240413902A1
公开(公告)日：2024-12-12
申请号：US18331919
申请日：2023-06-08
Applicant: NOKIA SOLUTIONS AND NETWORKS OY
Inventor： Robert Borkowski , Vincent Houtsma , Doutje Van Veen , Amitkumar Mahadevan , Kovendhan Vijayan
IPC: H04B10/079
Abstract: Various example embodiments of a signal analysis capability are presented herein. The signal analysis capability may be configured to support analysis of a signal for determining the signal integrity of the signal, where the signal integrity of the signal corresponds to a set of one or more measures of the quality of an electrical signal (e.g., one or more signal integrity metrics indicative of the signal integrity of the signal). The signal analysis capability may be configured to support analysis of a signal for determining the signal integrity of the signal for various types of signals which may be communicated within various types of communication networks. The signal analysis capability may be configured to support analysis of a signal for determining the signal integrity of the signal where the signal may include various types of data traffic (e.g., live data traffic, user data traffic, test data traffic, or the like).
-
Patent Agency Ranking
公开(公告)号：US12088439B1
公开(公告)日：2024-09-10
申请号：US18125225
申请日：2023-03-23
Applicant: Nokia Solutions and Networks Oy
Inventor： Doutje Van Veen , Vincent Houtsma
IPC: H04L25/03 , H04B10/2575
CPC classification number: H04L25/03878 , H04B10/25759 , H04L25/03006 , H04L2025/03815
Abstract: A phased approach to training of an upstream burst mode receiver equalizer is disclosed that proceeds incrementally through modulation schemes requiring increasing levels of equalization in a manner where the equalizer maintains the capability to accurately recover data transmitted during each training phase. The phased approach includes an initial training phase (one or more upstream bursts) using a simple modulation format, one or more intermediate phases of different modulation schemes, and a final training phase using the PON-defined (high) line rate upstream modulation format. Equalizer settings generated during the initial phase are used as a starting point for the equalization process in the next training phase, and so on, until the equalizer training reaches the final phase where the ONU uses the PON-defined upstream data rate and the burst mode equalizer is updated accordingly.
-
公开(公告)号：US12034620B2
公开(公告)日：2024-07-09
申请号：US16811405
申请日：2020-03-06
Applicant: Nokia Solutions and Networks Oy
Inventor： Amitkumar Mahadevan , Doutje Van Veen , Noriaki Kaneda , Vincent Houtsma , Paul Cautereels , Carl Mertens , Michael Fivez
IPC: H04L43/0823 , G06F30/20 , H03M13/11 , G06F111/10
CPC classification number: H04L43/0847 , G06F30/20 , H03M13/1102 , G06F2111/10
Abstract: Various example embodiments for supporting forward error correction (FEC) in a communication system are presented. Various example embodiments for supporting FEC in a communication system may include selection of a FEC setting (e.g., an amount of puncturing and/or shortening of a FEC code, a FEC code, or the like) for a communication channel from a transmitter to a receiver based on channel characteristic information of the communication channel from the transmitter to the receiver (e.g., transfer function information, channel loss information, noise characteristic information, error information (e.g., bit error rate, error modeling, or the like), or the like). Various example embodiments for supporting FEC in a communication system, based on selection of a FEC setting for a communication channel based on channel characteristic information of the communication channel, may be applied within various types of communication systems, including various types of wired and/or wireless communication systems.
-
公开(公告)号：US11764902B2
公开(公告)日：2023-09-19
申请号：US17470293
申请日：2021-09-09
Applicant: Nokia Solutions and Networks Oy
Inventor： Yannick Lefevre , Adriaan de Lind van Wijngaarden , Jochen Maes , Vincent Houtsma , Doutje Van Veen , Amitkumar Mahadevan , Michaël Fivez
IPC: H04L1/00 , H03M13/00 , H04B10/516 , H04B10/60
CPC classification number: H04L1/0068 , H03M13/6362 , H04B10/516 , H04B10/60 , H04L1/0041 , H04L1/0045
Abstract: Various example embodiments for supporting forward error correction (FEC) in a communication system are presented. Various example embodiments for supporting FEC in a communication system may include the selection of a FEC setting for a communication channel from a transmitter to a receiver, e.g., the selection of a FEC setting for a communication channel, the selection of a FEC setting for a data burst sent over a communication channel, the selection of a FEC setting for a portion of a data burst sent over a communication channel, switching between FEC settings for different portions of a data burst over a communication channel, or the like, as well as various combinations thereof.
-
公开(公告)号：US20210281501A1
公开(公告)日：2021-09-09
申请号：US16811405
申请日：2020-03-06
Applicant: Nokia Solutions and Networks Oy
Inventor： Amitkumar Mahadevan , Doutje Van Veen , Noriaki Kaneda , Vincent Houtsma , Paul Cautereels , Carl Mertens , Michael Fivez
Abstract: Various example embodiments for supporting forward error correction (FEC) in a communication system are presented. Various example embodiments for supporting FEC in a communication system may include selection of a FEC setting (e.g., an amount of puncturing and/or shortening of a FEC code, a FEC code, or the like) for a communication channel from a transmitter to a receiver based on channel characteristic information of the communication channel from the transmitter to the receiver (e.g., transfer function information, channel loss information, noise characteristic information, error information (e.g., bit error rate, error modeling, or the like), or the like). Various example embodiments for supporting FEC in a communication system, based on selection of a FEC setting for a communication channel based on channel characteristic information of the communication channel, may be applied within various types of communication systems, including various types of wired and/or wireless communication systems.
-
公开(公告)号：US20190207702A1
公开(公告)日：2019-07-04
申请号：US15858449
申请日：2017-12-29
Applicant: Nokia Solutions and Networks OY
Inventor： Doutje van Veen , Vincent Houtsma
IPC: H04J14/08 , H04B10/61 , H04B10/50 , H04B10/27 , H04B10/572
CPC classification number: H04J14/08 , H04B10/27 , H04B10/272 , H04B10/503 , H04B10/572 , H04B10/61 , H04B10/616 , H04J14/0221 , H04J14/0246 , H04J14/0282 , H04Q11/0067
Abstract: A coherent optical receiver capable of receiving data encoded in optical bursts whose optical power can vary significantly from burst to burst. In an example embodiment, the coherent optical receiver comprises a variable optical attenuator connected between an optical local oscillator and an optical hybrid and configured to controllably vary the intensity of the local-oscillator signal in response to a control signal generated by a control circuit. In an example embodiment, the control circuit is configured to generate the control signal for the variable optical attenuator using power-control settings read from a memory and further using a transmission schedule according to which different remote optical transmitters are scheduled to transmit their respective optical bursts. The power-control settings can be loaded into the memory, e.g., using a suitable calibration method configured to determine a respective nearly optimal coherent gain for receiving data from each of the remote optical transmitters.
-
-
-
-
-
-
-
-
-
Search Results
27
records
(took 0.026 seconds)
