公开(公告)号：US12113611B2

公开(公告)日：2024-10-08

申请号：US18061668

申请日：2022-12-05

Applicant: Nokia Solutions and Networks Oy

Inventor： Yannick Lefevre

IPC: H04J14/02 ,  H04Q11/00

CPC classification number: H04J14/0245 ,  H04Q11/0067

Abstract: In one embodiment, an apparatus is configured to perform mapping an interleaved bit stream into a sequence of 4-level pulse amplitude modulation (PAM4) labels according to a mapping scheme, with a respective PAM4 label including a least significant bit (LSB) and a most significant bit (MSB) respectively corresponding to a bit in the interleaved bit stream; transmitting a sequence of PAM4 symbols generated based on the sequence of PAM4 labels to the ONUs; and wherein, bits from respective one of the N codewords are assigned to LSBs of a first subset of labels, and to MSBs of a second subset of labels, with the first and the second subset of labels being determined based on the interleaving scheme and the mapping scheme and respectively comprising labels located N labels apart in the sequence of PAM4 labels.

公开(公告)号：US11388494B2

公开(公告)日：2022-07-12

申请号：US17136766

申请日：2020-12-29

Applicant: Nokia Solutions and Networks Oy

Inventor： Yannick Lefevre ,  Paul Henri Marie Cautereels ,  Jochen Maes

IPC: H04Q11/00 ,  H04L1/00

Abstract: According to example embodiments, the OLT includes at least one processor and at least one memory including computer program code, the at least one memory and computer program code configured to, with the at least one processor, cause the OLT to perform grouping data units for the ONUs in groups, wherein a group includes data units for a subset of the ONUs, encoding the groups of data units into respective sets of at least one codeword, interleaving the at least one codeword of the respective sets thereby obtaining a stream of codewords, and sequentially transmitting the stream of codewords to the ONUs.

公开(公告)号：US11196676B2

公开(公告)日：2021-12-07

申请号：US16594492

申请日：2019-10-07

Applicant: Nokia Solutions and Networks OY

Inventor： Bart Pauwels ,  Yannick Lefevre ,  Jochen Maes

IPC: H04L12/823 ,  H04L12/851 ,  H04L12/861 ,  H04L29/06 ,  H04L12/64 ,  H04L12/875 ,  H04L12/863 ,  H04W28/24

Abstract: Example embodiments describe a transmitter including data encapsulation circuitry configured to encapsulate data packets into Data Transport Units, DTUs, for further transmission over a communication medium. The data packets have respective Quality of Service, QoS, tolerances. The data encapsulation circuitry is configured to delay transmission of first data packets with a lower QoS tolerance and to group the first data packets in a subset of DTUs available for transportation of the first data packets.

公开(公告)号：US12191995B2

公开(公告)日：2025-01-07

申请号：US17861140

申请日：2022-07-08

Applicant: Nokia Solutions and Networks Oy

Inventor： Yannick Lefevre ,  Amitkumar Mahadevan ,  Michiel Verplaetse

IPC: H04L1/00 ,  H04B10/27

Abstract: A digital receiver based on one-dimensional hard demapping of an input symbol stream (FEC encoded) is configured to utilize LLRs created to have bit-specific magnitude values to improve the probability that the included decoder (such as an LDPC decoder) properly recovers each bit from the original stream. The digital receiver may be used with various types of data modulation schemes (e.g., PAM3, PAM4, DSQ8, etc.), with a specific set of LLR magnitudes created for each modulation scheme.

公开(公告)号：US12081926B2

公开(公告)日：2024-09-03

申请号：US17949553

申请日：2022-09-21

Applicant: Nokia Solutions and Networks Oy

Inventor： Yannick Lefevre ,  Wouter Lanneer ,  Werner Coomans

IPC: H04B10/00 ,  H04J14/02 ,  H04Q11/00 ,  H04B10/27 ,  H04J14/00

CPC classification number: H04Q11/0067 ,  H04J14/0282 ,  H04B10/27

Abstract: The method includes sending a first frame of a first modulation format that is suitable for a first group of receivers before sending a second frame of a second modulation format that is suitable for a second group of receivers, wherein the first modulation format is a higher modulation format than the second modulation format, and wherein the method further includes inserting into the first frame at least one symbol of the second modulation format at at least one outer edge of the first frame.

公开(公告)号：US11909523B2

公开(公告)日：2024-02-20

申请号：US17573930

申请日：2022-01-12

Applicant: Nokia Solutions and Networks Oy

Inventor： Yannick Lefevre ,  Amitkumar Mahadevan ,  Werner Van Hoof

IPC: H04B10/27 ,  H04L1/00

CPC classification number: H04L1/0042 ,  H04B10/27

Abstract: An upstream (US) optical line terminal (OLT) for a passive optical network having at least one downstream (DS) optical network unit (ONU). The OLT generates a trigger signal indicating a need to receive at least one US burst having a shortened codeword for a first forward error-correction (FEC) code. Based on the trigger signal, the OLT transmits a DS message instructing the ONU to transmit an US burst having a shortened codeword. The OLT receives and decodes the US burst having the shortened codeword using the first FEC code. During periods of high bit-error rate, the shortened codewords increase the ability of the OLT to decode the US bursts and keep communications from the ONU alive. The OLT can use the decoded US bursts to measure BER and, if appropriate, instruct the ONU to use a different FEC code.

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：US20220248110A1

公开(公告)日：2022-08-04

申请号：US17166966

申请日：2021-02-03

Applicant: Nokia Solutions and Networks Oy

Inventor： Yannick Lefevre ,  Amitkumar Mahadevan ,  Werner Van Hoof

IPC: H04Q11/00

Abstract: An optical network unit (ONU) includes a transmitter and receiver to optically communicate with an optical line terminal (OLT) of a passive optical network. The ONU is configured to send an acknowledgment message to the OLT in response to a burst-profile message unicast by the OLT. The acknowledgement message indicates unsupported forward error correction (FEC) code in response to the burst-profile message identifying an FEC code for upstream transmission and the ONU not supporting the FEC code for upstream transmission to the OLT.

公开(公告)号：US20250113126A1

公开(公告)日：2025-04-03

申请号：US18478951

申请日：2023-09-29

Applicant: Nokia Solutions and Networks Oy

Inventor： Yannick Lefevre ,  Amitkumar Mahadevan ,  Werner Van Hoof

IPC: H04Q11/00 ,  H04J14/02

Abstract: Various example embodiments for supporting optical communications in an optical communication system are presented herein. Various example embodiments for supporting optical communications in an optical communication system may be configured to support optical communications within a passive optical network (PON) including an optical line terminal (OLT) and an optical network unit (ONU) where communications between the OLT and the ONU is supported based on support for multiple ONU instances of the ONU within the PON.

公开(公告)号：US11979191B2

公开(公告)日：2024-05-07

申请号：US17701046

申请日：2022-03-22

Applicant: Nokia Solutions and Networks Oy

Inventor： Jochen Maes ,  Yannick Lefevre

IPC: H04B10/272 ,  H04J14/02 ,  H04L5/00 ,  H04Q11/00

CPC classification number: H04B10/272 ,  H04J14/0282 ,  H04L5/0044 ,  H04Q11/0067

Abstract: An apparatus grouping data units for optical network units into groups of Encapsulation Method, EM, frame(s), wherein a respective group of EM frame(s) include data units addressed to a respective subset of ONUs, generating, based on the groups of EM frame(s), a Framing Sublayer payload including at least one specific frame, wherein, the specific frame includes a length indicator determined in relation to the length of the group(s) of EM frame(s) that is(are) directly following the specific frame and is(are) addressed to at least one subset of ONUs; instructing the ONUs assigned to at least one of said at least one subset to process the EM frame directly following the specific frame, and instructing the ONUs not assigned to the at least one subset to process the EM frame that is indicated by the length indicator of the specific frame; and transmitting the Framing Sublayer payload to the ONUs.