公开(公告)号：US11258537B2

公开(公告)日：2022-02-22

申请号：US17101083

申请日：2020-11-23

Applicant: Cisco Technology, Inc.

Inventor： Gilberto Loprieno ,  Stefan Langenbach

IPC: H04B10/69 ,  H04L1/00 ,  H04B10/50 ,  H04B10/66

Abstract: A first device receives a first container frame having a payload of a first length. The payload of the container frame includes multiple optical transport unit (OTU) frames, each of which includes an optical data unit (ODU) frame and a sequence of forward error correction (FEC) bits for the ODU frame. Each OTU frame is associated with a first sequence of error-identifying bits. The first device determines, for each OTU frame, a second sequence of error-identifying bits, and forms a second container frame including the OTU frames, the first sequences of error-identifying bits, and the second sequences of error-identifying bits. The first device transmits the second container frame to a second device.

公开(公告)号：US09647696B2

公开(公告)日：2017-05-09

申请号：US14704385

申请日：2015-05-05

Applicant: Cisco Technology, Inc.

Inventor： Andreas Bisplinghoff ,  Stefan Langenbach ,  Norbert Beck

IPC: H03M13/00 ,  H03M13/37 ,  H03M13/11 ,  H03M13/25 ,  H03M13/45 ,  H03M13/29 ,  H03M13/33

CPC classification number: H03M13/3746 ,  H03M13/1102 ,  H03M13/1111 ,  H03M13/258 ,  H03M13/2957 ,  H03M13/336 ,  H03M13/3715 ,  H03M13/3784 ,  H03M13/45 ,  H03M13/458 ,  H03M13/616 ,  H03M13/6325 ,  H03M13/6337 ,  H04L1/0045

Abstract: A forward error correction and differentially encoded signal obtained via a communication channel is supplied to a soft-input soft-output (SISO) differential decoder that is bi-directionally coupled to a SISO forward error correction decoder. Over a first portion of a plurality of decoding iterations of the differentially encoded signal, the SISO differential decoder and the SISO forward error correction decoder are operated in a turbo decoding mode in which decoded messages generated by the SISO differential decoder are supplied to the SISO forward error correction decoder and forward error correction messages are supplied to the differential decoder. Over a second portion of the plurality of decoding iterations of the differentially encoded signal, the SISO forward error correction decoder is operated in a non-turbo decoding mode without any messages passing to and from the SISO differential decoder. Decoder output is obtained from the SISO forward error correction decoder.

公开(公告)号：US08601357B2

公开(公告)日：2013-12-03

申请号：US13733372

申请日：2013-01-03

Applicant: Cisco Technology, Inc.

Inventor： Nebojsa Stojanovic ,  Stefan Langenbach

IPC: H03M13/03

CPC classification number: H03M13/03 ,  H04L25/03184 ,  H04L25/03191

Abstract: This invention relates to methods for obtaining a bin number of path metrics. When performing such methods, a histogram is provided, which composes a bin number of values, a maximum value and a tail region left or right of the maximum value. A bin number of path metrics is obtained from said values. According to an embodiment a local extremum is removed from said tail region. According to another embodiment the tail region is forced to be convex. According to a further embodiment a maximum metric difference between neighboring metrics is ensured.

Abstract translation: 本发明涉及获得路数量度的箱数的方法。 当执行这样的方法时，提供直方图，其构成最大值的左边或右边的值的二进制数，最大值和尾部区域。 从所述值获得二进制数的路径度量。 根据实施例，从所述尾部区域移除局部极值。 根据另一个实施例，尾部区域被迫凸起。 根据另一实施例，确保相邻度量之间的最大度量差异。