Computation of a delay difference in an optical network
    22.
    发明公开
    Computation of a delay difference in an optical network 有权
    Berechnung einerVerzögerungsdifferenz在einem optischen Netzwerk

    公开(公告)号:EP2615752A1

    公开(公告)日:2013-07-17

    申请号:EP12305053.6

    申请日:2012-01-16

    申请人: Alcatel Lucent

    IPC分类号: H04J3/06

    CPC分类号: H04J3/0638 H04J3/0682

    摘要: A method for computing a difference between a first propagation delay of a first transmission line and a second propagation delay of a second transmission line. The first and second transmission lines connect a first node and a second node of an optical network. The method comprises, at the second node: receiving first data from the first node along the first transmission line; computing a time offset between a first clock signal recovered from the first data and a second clock signal generated at the second node; receiving second data from the first node along the second transmission line; and computing the difference on the basis of the first data, the second data and the time offset.

    摘要翻译: 一种用于计算第一传输线的第一传播延迟与第二传输线的第二传播延迟之间的差的方法。 第一和第二传输线连接光网络的第一节点和第二节点。 该方法包括:在第二节点处:沿第一传输线从第一节点接收第一数据; 计算从所述第一数据恢复的第一时钟信号与在所述第二节点处产生的第二时钟信号之间的时间偏移; 从所述第一节点沿着所述第二传输线接收第二数据; 以及基于第一数据,第二数据和时间偏移来计算差值。

    Correction of errors in a codeword
    23.
    发明公开
    Correction of errors in a codeword 有权
    肯尼克斯特的Korrektur von Fehlern

    公开(公告)号:EP2285003A1

    公开(公告)日:2011-02-16

    申请号:EP09305751.1

    申请日:2009-08-12

    申请人: Alcatel Lucent

    IPC分类号: H03M13/09 G06F17/30

    摘要: It is disclosed a method for correcting one or more errors in a codeword received at a network element of a communication network. The method comprises, before receiving the codeword, storing at the network element an error correction table comprising N correction information allowing to correct N correctable error patterns possibly affecting the codeword. The method further comprises, upon reception of the codeword at the network element: calculating a syndrome of the codeword; calculating an address applying an hash function to the calculated syndrome; using the calculated address for selecting in the error correction table one of the N correction information; and using the selected correction information for correcting one or more errors affecting the codeword.

    摘要翻译: 公开了一种用于校正在通信网络的网络单元处接收的码字中的一个或多个错误的方法。 所述方法包括:在接收到所述码字之前,在所述网络单元处存储包括N个校正信息的纠错表,所述纠错表允许修正可能影响所述码字的N个可校正错误模式。 所述方法还包括:在所述网元处接收到所述码字;计算所述码字的综合征; 计算应用散列函数到所计算的综合征的地址; 使用所计算的地址在所述纠错表中选择所述N个校正信息之一; 以及使用所选择的校正信息来校正影响码字的一个或多个错误。