公开(公告)号：US20230179319A1

公开(公告)日：2023-06-08

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：US20220248111A1

公开(公告)日：2022-08-04

申请号：US17562273

申请日：2021-12-27

Applicant: Nokia Solutions and Networks Oy

Inventor： Yannick LEFEVRE ,  Amitkumar MAHADEVAN ,  Werner VAN HOOF

IPC: H04Q11/00 ,  H04B10/272

Abstract: An apparatus, for use by an Optical Network Unit, performs receiving, from an Optical Line Terminal, a broadcast message including code set information indicating a first code set selected from a plurality of error correction code sets; determining whether the first code set is comprised in a group of code sets supported by the Optical Network Unit, wherein, the group of code sets includes at least one code set of the plurality of error correction code sets; and encoding an upstream transmission with the first code set, in case the first code set is included in the group of code sets.

公开(公告)号：US20240305917A1

公开(公告)日：2024-09-12

申请号：US18597337

申请日：2024-03-06

Applicant: Nokia Solutions and Networks Oy

Inventor： Yannick LEFEVRE ,  Laurens BREYNE ,  Michiel VERPLAETSE

IPC: H04Q11/00 ,  H04L1/00

CPC classification number: H04Q11/0067 ,  H04L1/0041 ,  H04L1/0071

Abstract: An apparatus configured to perform obtaining a stream of codewords, including a first type codeword and a second type codeword, wherein, the first type codeword is an idle codeword, and the second type codeword includes data intended for at least one of the ONUs; obtaining, an interleaved bitstream from the stream of codewords based on an interleaving scheme, wherein, in the interleaved bitstream, bits at positions corresponding the first type codeword include redundant bits, and bits at positions corresponding to the second type codeword include information bits; determining values for one or more redundant bits placed between two adjacent information bits in the interleaved bitstream based on the values of either or both of the two adjacent information bits; and transmitting the interleaved bitstream to one or more of the ONUs.

公开(公告)号：US20230010009A1

公开(公告)日：2023-01-12

申请号：US17701046

申请日：2022-03-22

Applicant: Nokia Solutions and Networks Oy

Inventor： Jochen MAES ,  Yannick LEFEVRE

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

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.

公开(公告)号：US20240322913A1

公开(公告)日：2024-09-26

申请号：US18610432

申请日：2024-03-20

Applicant: Nokia Solutions and Networks Oy

Inventor： Yannick LEFEVRE ,  Michiel VERPLAETSE ,  Wouter LANNEER

IPC: H04B10/69 ,  H04B10/079 ,  H04B10/27

CPC classification number: H04B10/6971 ,  H04B10/0795 ,  H04B10/27

Abstract: The present invention discloses an apparatus, comprising means for: determining a rate for a received signal in a passive optical network, PON; selecting, based on the determined rate, a set of coefficients for an equalizer from a plurality of predetermined sets of coefficients for the equalizer, wherein, the plurality of predetermined sets respectively corresponds to a plurality of rates; equalizing the received signal with the equalizer based on the selected set of coefficients, obtaining an equalized signal.

公开(公告)号：US20230100191A1

公开(公告)日：2023-03-30

申请号：US17949553

申请日：2022-09-21

Applicant: Nokia Solutions and Networks Oy

Inventor： Yannick LEFEVRE ,  Wouter LANNEER ,  Werner COOMANS

IPC: H04Q11/00 ,  H04J14/02

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：US20240397243A1

公开(公告)日：2024-11-28

申请号：US18673902

申请日：2024-05-24

Applicant: Nokia Solutions and Networks Oy

Inventor： Michiel VERPLAETSE ,  Yannick LEFEVRE

IPC: H04Q11/00

Abstract: Example embodiments describe an optical line terminal, OLT, configured to communicate in a passive optical network with one or more optical network units, ONUs. Optical burst signals transmitted by the one or more ONUs have respective symbol rates. The optical line terminal includes a burst-mode receiver configured to decode an optical burst signal from an ONU to a decoded output signal by one or more digital signal processing circuitries that process a signal at respective configurable processing rates. The optical line terminal is configured to perform obtaining the symbol rate of a next optical burst signal; and adjusting, during an interval between reception of valuable symbols within a previous optical burst signal and reception of valuable symbols within the next optical burst signal, the configurable processing rate of one or more digital signal processing circuitries based on the symbol rate of the next optical burst signal.

公开(公告)号：US20240106536A1

公开(公告)日：2024-03-28

申请号：US18449409

申请日：2023-08-14

Applicant: Nokia Solutions and Networks Oy

Inventor： Yannick LEFEVRE

IPC: H04B10/2507 ,  H04B10/54 ,  H04L25/03 ,  H04Q11/00

CPC classification number: H04B10/2507 ,  H04B10/54 ,  H04L25/03878 ,  H04Q11/0067

Abstract: An apparatus including at least one processor configured to execute instructions and cause the apparatus to perform, obtaining for a first possible state (s) of a received sample at the current time step (k), log-likelihood ratio, Ilr, values Ilrold,min, Ilrold,max of a first transmitted bit (bj), wherein, the Ilr values Ilrold,min, Ilrold,max are respectively associated with a most likely state and a less likely state related to a received sample at the previous time step (k−1); determining based on path metrics and branch metrics corresponding to the received sample at the current time step (k); a first parameter (Q) related to a difference between likelihoods of the most likely state and the less likely state; updating magnitude of the Ilr value Ilrold,min at least based on the Ilr value Ilrold,min, the Ilr value Ilrold,max, and the first parameter, to obtain an updated Ilr value Ilrold,updated.

公开(公告)号：US20220271979A1

公开(公告)日：2022-08-25

申请号：US17670889

申请日：2022-02-14

Applicant: Nokia Solutions and Networks Oy

Inventor： Wouter LANNEER ,  Yannick LEFEVRE ,  Paschalis TSIAFLAKIS ,  Werner COOMANS

IPC: H04L25/03 ,  H04L25/02

Abstract: The present disclosure relates to an equalizer training unit for deriving equalization parameters for compensating data-dependent distortion in received samples by use of a training sequence including a sequence p>1 times and cyclically comprising N sub-sequences of respective combinations of L time-domain symbols of a modulation scheme, wherein the N sub-sequences are cyclically arranged in a selected order and such that L−1 symbols of a respective sub-sequence overlap with symbols in the preceding and following sub-sequences. The present disclosure further relates to a training sequence generator unit for generative the training sequence and an equalizer employing the equalizer training unit.

公开(公告)号：US20240129652A1

公开(公告)日：2024-04-18

申请号：US18486751

申请日：2023-10-13

Applicant: Nokia Solutions and Networks Oy

Inventor： Michiel VERPLAETSE ,  Yannick LEFEVRE

IPC: H04Q11/00 ,  H04B10/508 ,  H04B10/524

CPC classification number: H04Q11/0067 ,  H04B10/508 ,  H04B10/524

Abstract: A method for transmitting a first segment of a first modulation format, a second segment of a second modulation format and a third segment of a third modulation format, wherein the second segment is transmitted between the first segment and the third segment, wherein the first modulation format includes a first set of constellation points, wherein the second modulation format includes a second set of constellation points, wherein the third modulation format includes a third set of constellation points, wherein the second set is included in an intersection of the first set and the third set, wherein the first set and the third set differ by at least one constellation point.