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10 条记录 (耗时 0.017 秒)

    DIGITAL TRANSMISSION SYSTEM AND DIGITAL TRANSMISSION METHOD
    1.
    发明公开
    DIGITAL TRANSMISSION SYSTEM AND DIGITAL TRANSMISSION METHOD 审中-公开

    公开(公告)号：EP3493433A1

    公开(公告)日：2019-06-05

    申请号：EP18215726.3

    申请日：2008-01-16

    申请人： Nippon Telegraph and Telephone Corporation ,  NTT Electronics Corporation

    发明人： KISAKA, Yoshiaki ,  OHARA, Takuya ,  AISAWA, Shigeki ,  MIYAMOTO, Yutaka ,  TAKEI, Kazuhito ,  ENDOH, Yasuyuki ,  MIURA, Katsuyoshi ,  NIKAIDO, Tadanobu ,  TOMIZAWA, Masahito

    IPC分类号： H04J3/00 ,  H04L1/00 ,  H04L29/08

    摘要： A digital transmission system (1403-1409) includes a rate adjusting means (1403, 1404) for adjusting the bit rate of a plurality of types of client signals to a bit rate range that can be accommodated in a digital frame transparently by inserting a dummy pattern, comprising a frame synchronization pattern, using a specific fixed frame, into the fixed frame for client signals other than the client signal having the highest bit rate among the plurality of types of client signals to increase the bit rate of the client signals. The number of bits of the dummy pattern and the number of bits of the client signal before the rate adjustment results in a rate M:N (where M and N are natural numbers) to construct the specific fixed frame, and the values N and M are set so that (Bc ±Ac) x (M + N)/N results in a bit rate range that can be accommodated in the digital frame, where the bit rate and the frequency accuracy of the client signal are Bc and ±Ac, respectively, wherein the dummy pattern of M bits is inserted to every N bits of the client signals.
    The digital transmission system (1403-1409) further comprises rate restoring means (1408, 1409) for restoring the rate to an original bit rate of a client signal by discriminating the dummy pattern area using the frame synchronization pattern and deleting the dummy pattern on a receiver side.

    OPTICAL TRANSMISSION SYSTEM AND METHOD
    4.
    发明公开
    OPTICAL TRANSMISSION SYSTEM AND METHOD 审中-公开
    OPTISCHESÜBERTRAGUNGSSYSTEMUND VERFAHREN

    公开(公告)号：EP1965528A1

    公开(公告)日：2008-09-03

    申请号：EP06835092.5

    申请日：2006-12-21

    申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION ,  NTT ELECTRONICS CORPORATION

    发明人： KISAKA, Yoshiaki ,  AISAWA, Shigeki ,  MIYAMOTO, Yutaka ,  TOMIZAWA, Masahito ,  ENDOH, Yasuyuki ,  TAKEI, Kazuhito

    IPC分类号： H04J3/00 ,  H04J14/00 ,  H04J14/02 ,  H04L12/28 ,  H04L12/56

    CPC分类号： H04J3/1652 ,  H04J3/07 ,  H04J2203/0085

    摘要： An optical transmission system for performing frequency synchronization even with a client signal with low frequency accuracy, and for transmitting thereof by accommodating/multiplexing without causing a bit slip. A new overhead is added to the entire client signal, and the signal including the new overhead being stuffed is transmitted in conjunction with a plurality of stuffing bits as an optical signal wherein a data storing bit for a negative stuffing, a stuffing information notification bit, and a stuff bits inserting bit for a positive stuffing in the payload are defined in plurality as stuffing bits for adjusting clock frequencies of the client signal in this new overhead.

    摘要翻译： 一种即使使用低频精度的客户端信号进行频率同步的光传输系统，也可以通过容纳/多路复用而不产生位滑动进行发送。 在整个客户端信号中增加新的开销，并且包括填充的新开销的信号与多个填充位一起作为光信号发送，其中，用于负填充的数据存储位，填充信息通知位， 并且用于在有效载荷中的正填充的填充比特插入位被定义为多个作为填充位，用于在该新开销中调整客户端信号的时钟频率。

    OPTICAL DIGITAL TRANSMISSION SYSTEM
    7.
    发明公开
    OPTICAL DIGITAL TRANSMISSION SYSTEM 有权
    OPTISCHESDIGITALÜBERTRAGUNGSSYSTEM

    公开(公告)号：EP2348654A1

    公开(公告)日：2011-07-27

    申请号：EP09825930.2

    申请日：2009-11-13

    申请人： Nippon Telegraph And Telephone Corporation ,  NTT Electronics Corporation

    发明人： AISAWA, Shigeki ,  TOMIZAWA, Masahito ,  MIYAMOTO, Yutaka ,  KISAKA, Yoshiaki ,  ENDO, Yasuyuki ,  MIURA, Katsuyoshi ,  TAKEI, Kazuhito

    IPC分类号： H04J3/00

    CPC分类号： H04J3/1652 ,  H04J3/076 ,  H04J2203/0089

    摘要： An optical digital transmission system of the present invention newly defines one second negative stuff byte in an overhead area for accommodation of the client signals with multiplexing into the OTU frame, newly defines one third positive stuff byte in a corresponding tributary slot in a payload area for accommodation of client signals with multiplexing, newly defines stuff control bits that is used for decision of the use of the second negative stuff byte and the third positive stuff byte in three different places in the overhead area for client signal accommodation with multiplexing, performs control by using the newly defined stuff control bits when accommodation of the client signal with the third positive stuff byte or the second negative stuff byte is required, and performs stuff control without using the newly defined stuff control bits when accommodation of the client signal by the third positive stuff byte and the second negative stuff byte is not required.

    摘要翻译： 本发明的光数字传输系统新定义了用于将客户端信号复用到OTU帧中的开销区域中的一个第二负填充字节，新定义了有效载荷区域中相应支路时隙中的三分之一正填充字节 客户端信号采用多路复用，新定义了用于决定使用第二负填充字节和第三正填充字节的填充控制位，用于客户端信号调制的开销区域中的三个不同位置进行多路复用，执行控制 当需要用第三正填充字节或第二负填充字节调节客户端信号时使用新定义的填充控制位，并且在将客户端信号调节到第三正值时，不使用新定义的填充控制位执行填充控制 填充字节和第二个负面填充字节不是必需的。

    CLIENT SIGNAL MAPPING CIRCUIT AND MAPPING METHOD
    9.
    发明公开
    CLIENT SIGNAL MAPPING CIRCUIT AND MAPPING METHOD 有权
    ABBLDUGSVERFAHRENDAFÜRSCHLISUNG ZUR ABBILDUNG VON

    公开(公告)号：EP2651056A1

    公开(公告)日：2013-10-16

    申请号：EP11846946.9

    申请日：2011-12-09

    申请人： Nippon Telegraph And Telephone Corporation

    发明人： SUZUKI, Masahiro ,  OHARA, Takuya ,  ONO, Takashi ,  AISAWA, Shigeki ,  TOMIZAWA, Masahito

    IPC分类号： H04J3/07 ,  H04J3/00

    CPC分类号： H04J3/0658 ,  H04J3/07 ,  H04J3/1652 ,  H04J14/0227 ,  H04Q11/0005 ,  H04Q2011/0045

    摘要： A client signal mapping circuit for accommodating a client signal in a transmission frame, including: a buffer unit configured to temporarily store the client signal; a buffer used amount monitoring unit configured to report a used amount of the buffer unit; a stuff processing determination unit configured to compare the used amount of the buffer unit with a predetermined reference value, and a pseudo random sequence signal and the comparison result; an overhead insertion unit configured to add an overhead to the client signal read from the buffer unit to form a transmission frame; and a reading control unit configured to perform control for reading the client signal from the buffer unit based on determination by the stuff processing determination unit.

    摘要翻译： 一种用于在传输帧中容纳客户信号的客户端信号映射电路，包括：缓冲单元，被配置为临时存储客户端信号; 缓冲器使用量监视单元，被配置为报告缓冲单元的使用量; 填补处理确定单元，被配置为将缓冲单元的使用量与预定参考值进行比较，以及伪随机序列信号和比较结果; 开销插入单元，被配置为向从缓冲器单元读取的客户端信号添加开销以形成传输帧; 以及读取控制单元，被配置为基于所述填充处理确定单元的确定来执行从所述缓冲器单元读取所述客户端信号的控制。