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    MODULATION METHOD, MODULATION PROGRAM, RECORDING MEDIUM, MODULATION DEVICE, AND LIGHT TRANSMITTER
    1.
    发明公开
    MODULATION METHOD, MODULATION PROGRAM, RECORDING MEDIUM, MODULATION DEVICE, AND LIGHT TRANSMITTER 有权
    调查报告，调查报告，澳大利亚证券交易所

    公开(公告)号：EP2249492A1

    公开(公告)日：2010-11-10

    申请号：EP09711758.4

    申请日：2009-02-20

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

    发明人： NAKAMURA, Hirotaka ,  KIMURA, Shunji ,  HARA, Kazutaka ,  KITAHARA, Koji

    IPC分类号： H04B10/04 ,  G02F1/01 ,  H01S5/06 ,  H04B10/06 ,  H04B10/14 ,  H04B10/26 ,  H04B10/28

    CPC分类号： H01S5/042 ,  G02F1/0123 ,  H01S5/0427

    摘要： A modulation method according to the invention is applied to a modulation device in which a light source is driven by a differential signal while a modulation circuit and the light source are capacitively coupled. In the modulation method of the invention, when an average potential fluctuates at an input terminal of the light source, a potential fluctuation is externally provided using a control circuit such that a normal phase side and a reverse phase side become equal to each other in a time constant of the fluctuation in average potential, and transient states of the average potentials at the normal phase side and reverse phase side are equalized and cancel each other as in-phase components of a signal input to the light source, which allows an optical signal to be normally transmitted from the light source. The optical signal can normally be transmitted from the light source even before the average potentials at a normal phase input terminal and a reverse phase input terminal of the light source are stabilized.

    摘要翻译： 根据本发明的调制方法被应用于其中在调制电路和光源电容耦合时由差分信号驱动光源的调制装置。 在本发明的调制方法中，当平均电位在光源的输入端波动时，使用控制电路外部提供电位波动，使得正常相位侧和反相侧在 平均电位波动的时间常数以及正相侧和反相侧的平均电位的过渡状态均衡并相互抵消，作为输入到光源的信号的同相分量，这允许光信号 从光源正常传输。 即使在光源的正相输入端子和反相输入端子的平均电位稳定之前，也可以从光源发送光信号。

    BAND ALLOCATION DEVICE, BAND ALLOCATION METHOD, AND BAND ALLOCATION PROGRAM
    4.
    发明公开
    BAND ALLOCATION DEVICE, BAND ALLOCATION METHOD, AND BAND ALLOCATION PROGRAM 审中-公开

    公开(公告)号：EP3823221A1

    公开(公告)日：2021-05-19

    申请号：EP19852069.4

    申请日：2019-08-16

    申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION

    发明人： UZAWA, Hiroyuki ,  UJIKAWA, Hirotaka ,  NAKAMURA, Hirotaka

    IPC分类号： H04L12/44

    摘要： A bandwidth allocation apparatus includes an acquisition unit acquiring scheduling information related to transmission of uplink data from a first subscriber line termination apparatus corresponding to a subscriber line termination apparatus needing to transfer uplink data with low latency, a requested amount reception unit receiving, from second subscriber line termination apparatus corresponding to a subscriber line termination apparatus not needing to transfer uplink data with low latency, information representing a requested amount related to transmission of uplink data from the second subscriber line termination apparatus, in a requested amount reception cycle corresponding to a cycle equal to or longer than a predetermined maximum round-trip time, and an allocation unit allocating, in an allocation amount determination cycle shorter than the requested amount reception cycle, a bandwidth to the uplink data from the first subscriber line termination apparatus on a basis of the scheduling information, and allocating, in the allocation amount determination cycle, a bandwidth to the uplink data from the second subscriber line termination apparatus on a basis of the information representing the requested amount.

    OPTICAL WAVELENGTH MULTIPLEX ACCESS SYSTEM
    5.
    发明公开
    OPTICAL WAVELENGTH MULTIPLEX ACCESS SYSTEM 有权
    OPTISCHESWELLENLÄNGENMULTIPLEXZUGANGSSYSTEM

    公开(公告)号：EP1628423A1

    公开(公告)日：2006-02-22

    申请号：EP04735400.6

    申请日：2004-05-28

    申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION

    发明人： NAKAMURA, Hirotaka ,  KANI, Junichi ,  SUZUKI, Hiroo ,  TESHIMA, Mitsuhiro ,  YAMAGUCHI, Ukyo ,  ONISHI, Hidetaka ,  IWATSUKI, Katsumi

    IPC分类号： H04J14/02 ,  H04B10/08

    CPC分类号： H04J14/0294 ,  H04J14/0226 ,  H04J14/0227 ,  H04J14/0246 ,  H04J14/025 ,  H04J14/028 ,  H04J14/0282 ,  H04J14/0283

    摘要： A dual structure for a multiplexing section extended to an OSU is obtained without adding a dynamic function, such as an optical switch, to a W-MULDEM. The W-MULDEM of an optical wavelength division multiplexing access system divides, among ports corresponding to the individual ONUs, downstream optical signals having wavelengths λd1 to λdn, which are received along a current-use optical fiber, or downstream optical signals having wavelengths λd1+Δλ to λdn+Δλ, which are received along a redundant optical fiber. The W-MULDEM also multiplexes, for the port that corresponds to the current-use optical fiber or the redundant optical fiber, upstream optical signals having wavelengths λu1 to λun or wavelengths λu1+Δλ to λun+Δλ, which are received along optical fibers corresponding to the ONUs. A wavelength difference between the downstream optical signal and the upstream optical signal that are consonant with each ONU is defined as an integer times the FSR of an AWG.

    摘要翻译： 获得扩展到OSU的复用部分的双重结构，而不向诸如光开关的动态功能添加到W-MULDEM。 光波分复用接入系统的W-MULDEM在对应于各个ONU的端口之间划分沿着当前使用的光纤接收的具有波长»d1至»dn的下行光信号或具有波长的下行光信号 »d1 +“»至»dn +”»，沿冗余光纤接收。 W-MULDEM还针对与当前使用的光纤或冗余光纤相对应的端口复用具有波长»u1至»un或波长»u1 +“»至»un +”»的上行光信号，这些信号被接收 沿着与ONU对应的光纤。 与每个ONU相关联的下游光信号和上游光信号之间的波长差被定义为AWG的FSR的整数倍。