ABR flow control using single bit congestion indication and wavelet transform filtering
    31.
    发明授权
    ABR flow control using single bit congestion indication and wavelet transform filtering 有权
    ABR流量控制采用单位拥塞指示和小波变换滤波

    公开(公告)号:US06584111B1

    公开(公告)日:2003-06-24

    申请号:US09185635

    申请日:1998-11-04

    IPC分类号: H04L1228

    摘要: A flow control system and methodology controls and avoids congestion in an Asynchronous Transfer Mode (ATM) network. The congestion state of a network switch is determined based on incoming Available Bit Rate (ABR) traffic, Constant Bit Rate (CBR) traffic, and Variable Bit Rate (VBR) traffic. High-frequency fluctuations due to VBR traffic are filtered out of the CBR/VBR traffic to determine the underlying trend of network traffic. A filtering mechanism is based on wavelet transforms. The switch congestion state is determined based on the current ABR traffic, the filtered CBR/VBR traffic, and the current status of buffers in the switch. The congestion state can then be used to adjust the ABR rate according to a feedback scheme such as Explicit Forward Congestion Indication (EFCI).

    摘要翻译: 流控制系统和方法控制并避免异步传输模式(ATM)网络中的拥塞。 基于传入的可用比特率(ABR)流量,恒定比特率(CBR)流量和可变比特率(VBR)流量来确定网络交换机的拥塞状态。 由于VBR流量引起的高频波动被从CBR / VBR流量中滤除,以确定网络流量的潜在趋势。 滤波机制是基于小波变换的。 交换机拥塞状态根据当前ABR流量,CBR / VBR流量的过滤和交换机缓冲区的当前状态确定。 然后可以使用拥塞状态根据诸如显式前向拥塞指示(EFCI)的反馈方案来调整ABR速率。

    Method and apparatus for encoding a plurality of pre-defined codes into a search key and for locating a longest matching pre-defined code
    32.
    发明授权
    Method and apparatus for encoding a plurality of pre-defined codes into a search key and for locating a longest matching pre-defined code 失效
    用于将多个预定义代码编码到搜索关键字中并用于定位最长匹配的预定义代码的方法和装置

    公开(公告)号:US07324519B2

    公开(公告)日:2008-01-29

    申请号:US11034839

    申请日:2005-01-14

    IPC分类号: H04L12/56

    摘要: A method and apparatus for locating in a list of pre-defined codes, a longest code matching a given code. The method and apparatus involve producing a search mask encoding at least one portion of said given code and comparing the search mask to a search key having a Prefix Node Bit Array (PNBA) in which a bit is set active in at least one of a plurality of bit positions corresponding to possible bit combinations of bits in a bit string having a length equal to or less than the longest predefined code in the plurality of pre-defined codes and arranged by the lengths of possible bit combinations and by numeric values of the bit combinations, to identify a common active bit position in the search key and the search mask corresponding to one of the pre-defined codes having a length greater than all others of said pre-defined codes which correspond to common active bit positions.

    摘要翻译: 用于定位在预定义代码列表中的方法和装置,其是与给定代码匹配的最长代码。 所述方法和装置包括产生编码所述给定代码的至少一部分的搜索掩码,并且将搜索掩码与具有前缀节点位阵列(PNBA)的搜索关键字进行比较,其中将位设置为多个 对应于具有等于或小于多个预定义代码中的最长预定义代码的长度的比特串中的比特的可能比特组合的比特位置,并且由可能的比特组合的长度和比特的数值 组合,以识别搜索关键字中的公共活动比特位置和对应于具有大于对应于公共活动比特位置的所述预定义码的所有其他长度的预定义码之一的搜索掩码。

    Rotator communication switch having redundant elements
    33.
    发明授权
    Rotator communication switch having redundant elements 有权
    旋转通信开关具有冗余元件

    公开(公告)号:US07184431B2

    公开(公告)日:2007-02-27

    申请号:US09954192

    申请日:2001-09-18

    IPC分类号: H04L12/50

    CPC分类号: H04L49/10 H04L49/25 H04L49/90

    摘要: A rotator switch includes active and redundant tandem buffers used to switch information units through the switch. The tandem buffers are interconnected to inputs and outputs by way of commutators. Information provided to one or more of the active buffers is provided to a redundant buffer. If an active tandem buffer fails, the switch may use the redundant buffer in place of the failed active buffer. A further rotator switch is formed using a plurality of switching blocks. Each switching block includes its own set of tandem buffers, and ingress and egress commutators to interconnect the tandem buffers to inputs and outputs. The plurality of switching blocks is interconnected using additional commutators. At least one of these switching blocks is redundant and is provided with information provided to an active switching block. In the event of failure of an active block, the switch may use a redundant switching block in place of the failed or replaced active block.

    摘要翻译: 旋转开关包括用于通过开关切换信息单元的主动和冗余串联缓冲器。 串联缓冲器通过换向器与输入和输出互连。 提供给一个或多个活动缓冲器的信息被提供给冗余缓冲器。 如果主动串联缓冲区出现故障,则交换机可能会使用冗余缓冲区来代替故障的主动缓冲区。 使用多个切换块形成另外的旋转开关。 每个切换块包括其自己的串联缓冲器集合,以及用于将串联缓冲器互连到输入和输出的入口和出口换向器。 多个切换块使用附加换向器互连。 这些切换块中的至少一个是冗余的并且被提供有提供给有源切换块的信息。 在活动块发生故障的情况下,交换机可以使用冗余交换块来代替故障或更换的活动块。

    Method and apparatus for adjusting packet transmission volume from a source
    34.
    发明授权
    Method and apparatus for adjusting packet transmission volume from a source 失效
    用于从源调节分组传输量的方法和装置

    公开(公告)号:US06990070B1

    公开(公告)日:2006-01-24

    申请号:US09465705

    申请日:1999-12-17

    IPC分类号: H04J1/16

    摘要: A method and apparatus are provided for adjusting the volume of data communicated between a transmitter and a receiver on a network, in a time interval. The method involves producing a desired volume value in response to a volume value specified by the receiver and a difference between a target departure volume and an estimate of arrival volume of data at a queue through which data passes from the transmitter to the receiver, and communicating the desired volume value to the transmitter in response to an acknowledgement signal produced by the receiver.

    摘要翻译: 提供了一种用于在时间间隔内调整在网络上的发射机和接收机之间传送的数据量的方法和装置。 该方法涉及响应于由接收机指定的音量值产生期望的音量值,以及目标出发音量与数据从发射机到接收机的队列间到达音量的估计之间的差异,以及通信 响应于由接收机产生的确认信号而向发射机发送期望的音量值。

    Techniques for time transfer via signal encoding
    35.
    发明授权
    Techniques for time transfer via signal encoding 失效
    通过信号编码进行时间传输的技术

    公开(公告)号:US08675686B2

    公开(公告)日:2014-03-18

    申请号:US13162242

    申请日:2011-06-16

    IPC分类号: H04J3/06

    摘要: Techniques for time transfer via signal encoding are disclosed. In one particular exemplary embodiment, the techniques may be realized as a method for time transfer via signal encoding comprising generating a time service ordered-set for inclusion in a physical coding sublayer frame of a physical layer device, generating time service data for inclusion in the physical coding sublayer frame of the physical layer device, and transmitting the physical coding sublayer frame.

    摘要翻译: 公开了通过信号编码进行时间传递的技术。 在一个特定的示例性实施例中,这些技术可以被实现为用于经由信号编码的时间传送的方法,包括生成用于包括在物理层设备的物理编码子层帧中的时间服务有序集,生成包括在 物理层设备的物理编码子层帧,并发送物理编码子层帧。

    TECHNIQUES FOR TIME TRANSFER VIA SIGNAL ENCODING
    36.
    发明申请
    TECHNIQUES FOR TIME TRANSFER VIA SIGNAL ENCODING 有权
    通过信号编码进行时间传输的技术

    公开(公告)号:US20100080248A1

    公开(公告)日:2010-04-01

    申请号:US12347314

    申请日:2008-12-31

    IPC分类号: H04J3/06

    摘要: Techniques for time transfer via signal encoding are disclosed. In one particular exemplary embodiment, the techniques may be realized as a method for time transfer via signal encoding comprising generating a time service ordered-set for inclusion in a physical coding sublayer frame of a physical layer device, generating time service data for inclusion in the physical coding sublayer frame of the physical layer device, and transmitting the physical coding sublayer frame.

    摘要翻译: 公开了通过信号编码进行时间传递的技术。 在一个特定的示例性实施例中,这些技术可以被实现为用于经由信号编码的时间传送的方法,包括生成用于包括在物理层设备的物理编码子层帧中的时间服务有序集,生成包括在 物理层设备的物理编码子层帧,并发送物理编码子层帧。

    Differential clock recovery in packet networks
    37.
    发明授权
    Differential clock recovery in packet networks 有权
    分组网络中的差分时钟恢复

    公开(公告)号:US07492732B2

    公开(公告)日:2009-02-17

    申请号:US11294146

    申请日:2005-12-05

    IPC分类号: H04B7/212

    CPC分类号: H04J3/0658

    摘要: Where a common network clock is available at both a TDM receiver and a TDM transmitter which communicate via a packet network, differential clock recovery can be accomplished by matching the number of service clock pulses in a network reference clock period at the transmitter and receiver. In one embodiment the transmitter need only send a counter value from a counter that is clocked and reset, respectively, by the service clock and network reference clock, thereby allowing use of different types of oscillators, both analog and digital, to be implemented at the transmitter and receiver. The technique is also general enough to be applied in a wide variety of packet networks including but not limited to IP, MPLS and Ethernet. In an alternative embodiment, a faster derived network clock fdnc drives both the transmitter and receiver counters, which in turn are reset, respectively by the slower transmitter service clock fsc and slower receiver service clock frc.

    摘要翻译: 在通过分组网络进行通信的TDM接收机和TDM发射机都可以使用公共网络时钟的情况下,差分时钟恢复可以通过在发射机和接收机的网络参考时钟周期内匹配服务时钟脉冲的数量来实现。 在一个实施例中,发射机仅需要通过服务时钟和网络参考时钟分别从计时器发送计数器值并将其复位,从而允许使用不同类型的模拟和数字振荡器来实现 发射机和接收机。 该技术也足以应用于各种分组网络,包括但不限于IP,MPLS和以太网。 在替代实施例中,更快的导出网络时钟fdnc驱动发射机和接收机计数器,发射机和接收机计数器又分别被较慢的发射机业务时钟fsc和较慢的接收机业务时钟frc复位。

    Three-way message exchange clock synchronization
    38.
    发明申请
    Three-way message exchange clock synchronization 有权
    三路信息交换时钟同步

    公开(公告)号:US20070097947A1

    公开(公告)日:2007-05-03

    申请号:US11362697

    申请日:2006-02-27

    IPC分类号: H04J3/06

    CPC分类号: H04J3/065 H04J3/0667

    摘要: The invention includes a technique for clock recovery in a network having master and slave clocks in respective Time Division Multiplexing (“TDM”) network segments which are interconnected by a non-TDM segment. Master clock timestamps are sent to the slave. The slave measures a master clock timestamp inter-arrival interval, and sends slave clock timestamps to the master. The master measures a slave clock timestamp inter-arrival interval, and sends that slave clock timestamp inter-arrival interval to the slave. The slave then calculates an error signal based at least in-part on the difference between the master clock timestamp inter-arrival interval and the slave clock timestamp inter-arrival interval, and employs the difference to recover the first service clock in the second TDM segment.

    摘要翻译: 本发明包括一种用于在通过非TDM分段互连的相应时分复用(“TDM”)网段中的主时钟和从时钟的网络中的时钟恢复技术。 主时钟时间戳被发送到从站。 从站测量主时钟时间戳到达间隔时间,并向主机发送从时钟时间戳。 主机测量从时钟时间戳到达间隔时间,并将从属时钟时间戳到到达间隔发送到从机。 然后,从设备至少部分地基于主时钟间隔到达间隔和从时钟时间戳到达间隔之间的差异来计算误差信号,并且采用差异来恢复第二TDM段中的第一服务时钟 。

    Technique for filter-enhanced clock synchronization
    40.
    发明授权
    Technique for filter-enhanced clock synchronization 失效
    滤波增强时钟同步技术

    公开(公告)号:US07409020B1

    公开(公告)日:2008-08-05

    申请号:US10732532

    申请日:2003-12-11

    IPC分类号: H04B1/10

    CPC分类号: H03L7/093 H04J3/0632

    摘要: A technique for filter-enhanced clock synchronization is disclosed. In one particular exemplary embodiment, the technique may be realized by/as a method for filter-enhanced clock synchronization. The method comprises subjecting a clock error signal to a first exponentially weighted moving average (EWMA) filter to generate a first output signal, where the first EWMA filter comprises a first gain element. And the method further comprises subjecting the first output signal to a second EWMA filter to generate a second output signal, where the second EWMA filter comprises a second gain element and the second EWMA filter is coupled with a feedback loop having a delay element and a summing junction.

    摘要翻译: 公开了一种用于滤波器增强时钟同步的技术。 在一个特定的示例性实施例中,该技术可以通过/作为滤波器增强时钟同步的方法来实现。 该方法包括使时钟误差信号经受第一指数加权移动平均(EWMA)滤波器以产生第一输出信号,其中第一EWMA滤波器包括第一增益元件。 并且该方法还包括使第一输出信号经受第二EWMA滤波器以产生第二输出信号,其中第二EWMA滤波器包括第二增益元件,而第二EWMA滤波器与具有延迟元件的反馈回路耦合, 交界处