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    • 2. 发明授权
    • Scheduling incoming packet traffic on an output link of a network device associated with a data network
    • 在与数据网络相关联的网络设备的输出链路上调度传入的分组流量
    • US07688734B2
    • 2010-03-30
    • US11435371
    • 2006-05-16
    • Jan Willem HellenthalJean Gerardus Leonardus Jennen
    • Jan Willem HellenthalJean Gerardus Leonardus Jennen
    • G01R31/08
    • H04L47/10H04L47/2441H04L47/36H04L47/39H04L47/50H04L47/527H04L47/6225H04L47/623
    • The present invention provides a method and an apparatus for scheduling a flow on an output link among a plurality of flows of incoming packet traffic at a network device associated with a data network. A scheduler comprises scheduler logic that uses a credit counter per flow to keep track of the service difference received between two or more flows and selects the flow for service next that has the maximum credit value. The scheduler logic updates an amount of credit value in a counter of the next flow with the front-end packet currently being served among the first and second flows with a value that substantially equals a packet size value divided by a flow weight value of the front-end packet currently being served. The scheduler logic further updates an amount of credit value in the first and second counters of the first and second flows having packets waiting with a value that substantially equals the size of the front-end packet currently being served.
    • 本发明提供一种用于在与数据网络相关联的网络设备处的输入分组业务的多个流中的输出链路上调度流的方法和装置。 调度器包括调度器逻辑,其使用每个流的信用计数器来跟踪在两个或更多流之间接收到的服务差异,并选择具有最大信用值的接下来的服务流。 调度器逻辑在第一和第二流当前正在服务的前端分组之间更新下一个流的计数器中的信用值的量,其值大致等于分组大小值除以前面的流量权重值 当前正在提供的-end数据包。 调度器逻辑进一步更新第一和第二流的第一和第二计数器中的信用量的量,其具有以等于当前服务的前端分组的大小的值等待的分组。
    • 3. 发明授权
    • Optical device for extracting a sideband signal from a composite signal including orthogonally modulated signals
    • 用于从包括正交调制信号的复合信号中提取边带信号的光学装置
    • US07315699B2
    • 2008-01-01
    • US10832156
    • 2004-04-26
    • Jean Gerardus Leonardus JennenKyriakos Vlachos
    • Jean Gerardus Leonardus JennenKyriakos Vlachos
    • H04B10/06
    • H04B10/69H04B10/66
    • An optical device extracts an information bearing sideband such as an FSK or SCM signal (label) from a composite signal that includes the sideband and an orthogonally modulated signal such as an intensity modulated signal (payload) by splicing the composite signal into a polarization maintaining fiber at a desired angle so that the composite signal is separated into two orthogonal polarizations that experience differential group delay in the fiber. The polarized output signals from the fiber are then coupled to a polarization beam splitter at an equivalent or complementary angle to the desired angle so that one sideband of the composite signal appears at a first output of the beam splitter while another sideband appears at a second output of the beam splitter. The sidebands can then be converted to an electrical data signal by using an appropriate receiver, such as a balanced receiver for FSK signals. In one embodiment of the present invention, an input polarization beam splitter is coupled to the polarization maintaining fiber which, in turn, is coupled to an output polarization beam splitter. The coupling at each end of the fiber is made at approximately 45° to one polarization axis of the fiber. The fiber is characterized by a beat length Lbeat and the fiber is designed to have a length substantially equal to (Lbeat×fc)/2δf, wherein the sidebands of the composite signal are separated by a wavelength difference δf and fc is the nominal center frequency of the composite signal. This device has been shown to be useful for extracting GMPLS LSC level wavelength labels from either an FSK/IM composite signal or an SCM/IM composite signal.
    • 光学装置通过将复合信号拼接成偏振保持光纤,从包括边带的复合信号和诸如强度调制信号(有效载荷)的正交调制信号中提取诸如FSK或SCM信号(标签)的信息承载边带 以使所述复合信号被分成两个在光纤中经历差分群延迟的正交偏振。 然后,来自光纤的偏振输出信号以与期望角度等效或互补的角度耦合到偏振分束器,使得复合信号的一个边带出现在分束器的第一输出处,而另一边带出现在第二输出 的分束器。 然后可以通过使用适当的接收器(例如FSK信号的平衡接收器)将边带转换成电数据信号。 在本发明的一个实施例中,输入偏振分束器耦合到偏振保持光纤,偏振保持光纤又耦合到输出偏振分束器。 在光纤的每个端部处的耦合在与光纤的一个偏振轴成约45°的位置。 光纤的特征在于拍子长度L> beat and and and and / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / 2deltaf,其中复合信号的边带由波长差Δt分隔,并且f C是复合信号的标称中心频率。 该装置已被证明可用于从FSK / IM复合信号或SCM / IM复合信号中提取GMPLS LSC电平波长标签。
    • 5. 发明授权
    • Optical device for extracting a sideband signal from a composite signal including orthogonally modulated signals
    • 用于从包括正交调制信号的复合信号中提取边带信号的光学装置
    • US07376360B2
    • 2008-05-20
    • US11018028
    • 2004-12-21
    • Jean Gerardus Leonardus Jennen
    • Jean Gerardus Leonardus Jennen
    • H04B10/06
    • H04B10/66H04B10/5165H04B10/5563H04B10/69H04B2210/07
    • An optical device extracts an information bearing sideband such as an FSK or SCM signal (label) from a composite signal that includes the sideband and an orthogonally modulated signal such as an intensity modulated signal (payload) by employing polarization beam splitting and polarization transformation. Polarization transformation is accomplished by splicing the optical signal into a polarization maintaining fiber at a desired angle so that it is separated into two orthogonal polarizations that experience differential group delay in the fiber. The fiber is characterized by a beat length Lbeat and the fiber is designed to have a length substantially equal to (Lbeat×fc)/2δf, wherein the sidebands of the composite signal are separated by a wavelength difference δf and fc is the nominal center frequency of the composite signal. This device has been shown to be useful for extracting GMPLS LSC level wavelength labels from either an FSK/IM composite signal or an SCM/IM composite signal.
    • 光学装置通过使用偏振光束分离和偏振变换,从包括边带的复合信号和诸如强度调制信号(有效载荷)的正交调制信号中提取诸如FSK或SCM信号(标签)的信息承载边带。 通过将光信号拼接成所需角度的偏振保持光纤来实现极化转换,使得其被分离成在光纤中经历差分群延迟的两个正交偏振。 光纤的特征在于拍子长度L> beat and and and and / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / / 2deltaf,其中复合信号的边带由波长差Δt分隔,并且f C是复合信号的标称中心频率。 该装置已被证明可用于从FSK / IM复合信号或SCM / IM复合信号中提取GMPLS LSC电平波长标签。
    • 8. 发明授权
    • Method and system for increasing the spectral efficiency of binary coded digital signals
    • 提高二进制编码数字信号频谱效率的方法和系统
    • US07421204B2
    • 2008-09-02
    • US10934610
    • 2004-09-02
    • Jean Gerardus Leonardus Jennen
    • Jean Gerardus Leonardus Jennen
    • H04J14/00
    • H04B10/505H04B10/5055H04B10/5563H04J14/02H04L27/2014H04L27/2096H04L27/223
    • A method and system for increasing the spectral efficiency of binary coded signals includes encoding an input binary bit sequence such that the input binary bit sequence is converted into a series of rectangular pulses having varying repetition rates. A continuous wave carrier signal is then modulated via a control signal representative of the encoded signal. The modulated optical signal is filtered by a narrow band optical filter to generate a minimum shift keying (MSK) encoded optical signal. In accordance with the present invention, an input binary bit sequence is encoded via a minimum shift keying (MSK) modulation format to improve the spectral efficiency of a binary coded digital signal and to contemporaneously limit distortion of the optical signal induced by optical nonlinear effects during transmission in an optical transmission system.
    • 用于提高二进制编码信号的频谱效率的方法和系统包括编码输入二进制比特序列,使得输入二进制比特序列被转换成具有不同重复率的一系列矩形脉冲。 然后通过表示编码信号的控制信号调制连续波载波信号。 经调制的光信号被窄带光滤波器滤波以产生最小移位键控(MSK)编码的光信号。 根据本发明,通过最小移位键控(MSK)调制格式对输入的二进制位序列进行编码,以提高二进制编码数字信号的频谱效率,同时限制由光学非线性效应引起的光信号的失真 在光传输系统中的传输。