公开(公告)号：US20250055670A1

公开(公告)日：2025-02-13

申请号：US18791992

申请日：2024-08-01

Applicant: Nokia Solutions and Networks Oy

Inventor： Eric VAN DEN BERG ,  Michiel VERPLAETSE

IPC: H04L9/00 ,  H04Q11/00

Abstract: Example embodiments describe an optical network unit, ONU, configured to transmit data to an optical line terminal, OLT, during upstream timeslots within a passive optical network; wherein the ONU includes a scrambler circuitry configured to scramble at least one data stream according to a periodic scrambling pattern, and a descrambler circuitry configured to descramble the at least one scrambled data stream according to the periodic scrambling pattern; and wherein the ONU further includes at least one data channel for exchanging the at least one scrambled data stream between the scrambler circuitry and the descrambler circuitry; and wherein the scrambler circuitry is further configured to perform, during a period between the upstream timeslots: scrambling a predetermined reference sequence according to the periodic scrambling pattern, thereby obtaining a scrambled reference sequence; and sending the scrambled reference sequence to the descrambler circuitry over the at least one data channel.