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    Differential clock recovery in packet networks
    1.
    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

    申请人： James Aweya ,  Michel Ouellette ,  Delfin Montuno ,  Kent Felske

    发明人： James Aweya ,  Michel Ouellette ,  Delfin Montuno ,  Kent Felske

    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
    2.
    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

    申请人： James Aweya ,  Michel Ouellette ,  Delfin Montuno ,  Kent Felske

    发明人： James Aweya ,  Michel Ouellette ,  Delfin Montuno ,  Kent Felske

    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 。

    Rate-based integral control scheme for active queue management
    4.
    发明授权
    Rate-based integral control scheme for active queue management 失效
    主动队列管理的基于速率的积分控制方案

    公开(公告)号：US07298699B1

    公开(公告)日：2007-11-20

    申请号：US10426289

    申请日：2003-04-30

    申请人： Delfin Montuno ,  James Aweya ,  Michel Ouellette ,  Kent Felske

    发明人： Delfin Montuno ,  James Aweya ,  Michel Ouellette ,  Kent Felske

    IPC分类号： H04L12/26

    CPC分类号： H04L47/31 ,  H04L41/142 ,  H04L43/00 ,  H04L43/022 ,  H04L43/0894 ,  H04L43/16 ,  H04L47/10 ,  H04L47/18

    摘要： Disclosed is an Active Queue Management method and apparatus which uses traffic rate information for congestion control. Using a nonlinear fluid-flow model of Traffic Control Protocol, an integral controller in a closed loop configuration with gain settings characterized for stable operation allows a matching of the aggregate rate of the active TCP connections to the available capacity. Further disclosed is a method for calculation of the regime of gains for which stable operation of a given network obtains. This approach allows for capacity matching while maintaining minimal queue size and high link utilization.

    摘要翻译： 公开了一种使用业务速率信息进行拥塞控制的活动队列管理方法和装置。 使用流量控制协议的非线性流体流模型，具有以稳定操作为特征的增益设置的闭环配置中的集成控制器允许活动TCP连接的总速率与可用容量的匹配。 进一步公开了一种用于计算给定网络的稳定运行获得的增益方案的方法。 这种方法允许容量匹配，同时保持最小的队列大小和高的链路利用率。

    Method and apparatus for synchronizing clock timing between network elements
    5.
    发明申请
    Method and apparatus for synchronizing clock timing between network elements 有权
    用于在网络元件之间同步时钟定时的方法和装置

    公开(公告)号：US20060056563A1

    公开(公告)日：2006-03-16

    申请号：US11172335

    申请日：2005-06-30

    申请人： James Aweya ,  Delfin Montuno ,  Michel Ouellette ,  Kent Felske

    发明人： James Aweya ,  Delfin Montuno ,  Michel Ouellette ,  Kent Felske

    IPC分类号： H03D3/24 ,  H04L7/00

    CPC分类号： H03L7/0805 ,  H03D13/002 ,  H03L7/085 ,  H03L7/093 ,  H03L7/0992 ,  H03L7/10 ,  H03L2207/50 ,  H04J3/0658 ,  H04J3/0664

    摘要： Network elements may be synchronized over an asynchronous network by implementing a master clock as an all digital PLL that includes a Digitally Controlled Frequency Selector (DCFS), the output frequency of which may be directly controlled through the input of a control word. The PLL causes the control word input to the master DCFS to be adjusted to cause the output of the master DCFS to lock onto a reference frequency. Information associated with the control word is transmitted from the master clock to the slave clocks which are also implemented as DCFSs. By using the transmitted information to recreate the master control word, the slaves may be made to assume the same state as the master DCFS without requiring the slaves to be implemented as PLLs. The DCFS may be formed as a digitally controlled oscillator (DCO) or as a Direct Digital Synthesizer (DDS).

    摘要翻译： 网络元件可以通过将主时钟实现为包括数字控制频率选择器（DCFS）的全数字PLL的主时钟同步，其输出频率可以通过控制字的输入直接控制。 PLL会导致对主DCFS的输入控制字进行调整，使主DCFS的输出锁定在参考频率上。 与控制字相关的信息从主时钟发送到也被实现为DCFS的从时钟。 通过使用所发送的信息来重建主控制字，可以使从属设备呈现与主DCFS相同的状态，而不需要将从机实现为PLL。 DCFS可以形成为数字控制振荡器（DCO）或直接数字合成器（DDS）。

    Method and system for content detection and interception in communication networks
    6.
    发明授权
    Method and system for content detection and interception in communication networks 有权
    通信网络中内容检测和拦截的方法和系统

    公开(公告)号：US09064093B1

    公开(公告)日：2015-06-23

    申请号：US10745065

    申请日：2003-12-22

    申请人： Kent Felske ,  James Aweya ,  Delfin Montuno ,  Michel Ouellette

    发明人： Kent Felske ,  James Aweya ,  Delfin Montuno ,  Michel Ouellette

    IPC分类号： G06F21/00

    CPC分类号： G06F21/00 ,  G06F21/16 ,  G06F2221/0788

    摘要： A system in which data signatures are used to identify copyrighted content passing through a network. The data signatures are derived from files containing copyrighted content to be identified. The signatures are used to search within peer-to-peer data streams flowing through one or more network nodes in a communications network. Any specific technique may be used for pattern recognition between the signatures and the monitored traffic. When a particular file of interest is identified, the system may operate to perform one or more of several possible actions, including stopping the transmission, allowing the transmission but recording the event, making an offer to the recipient allowing them to legally purchase the file, or sending alternative information or intentionally corrupting the information to render it useless to the recipient.

    摘要翻译： 使用数据签名来识别经过网络的受版权保护的内容的系统。 数据签名是从包含要识别的受版权保护的内容的文件导出的。 这些签名用于在流经通信网络中的一个或多个网络节点的对等数据流中搜索。 任何具体技术可用于签名和被监视业务之间的模式识别。 当识别出感兴趣的特定文件时，系统可以操作以执行几种可能的动作中的一种或多种，​​包括停止传输，允许传输但记录事件，向接收者提供允许他们合法购买文件的提议， 或发送替代信息或故意破坏信息，使其对接收者无效。

    Rate-based proportional-integral control scheme for active queue management
    7.
    发明授权
    Rate-based proportional-integral control scheme for active queue management 有权
    基于速率的比例积分控制方案主动队列管理

    公开(公告)号：US07424546B1

    公开(公告)日：2008-09-09

    申请号：US10426286

    申请日：2003-04-30

    申请人： James Aweya ,  Michel Ouellette ,  Delfin Montuno ,  Kent Felske

    发明人： James Aweya ,  Michel Ouellette ,  Delfin Montuno ,  Kent Felske

    IPC分类号： G06F15/16 ,  G06F15/173 ,  G06F11/00

    CPC分类号： H04L47/10 ,  H04L43/0894 ,  H04L43/16 ,  H04L47/12 ,  H04L47/193 ,  H04L47/31 ,  H04L47/32 ,  H04L69/02 ,  H04L69/28

    摘要： Disclosed is an Active Queue Management method and apparatus which uses traffic rate information for congestion control. Using a nonlinear fluid-flow model of Traffic Control Protocol, a proportional-integral controller in a closed loop configuration with gain settings characterized for stable operation allows a matching of the aggregate rate of the active TCP connections to the available capacity. Further disclosed is a method for calculation of the regime of gain settings for which stable operation of a given network obtains. This approach allows for capacity matching while maintaining minimal queue size and high link utilization.

    摘要翻译： 公开了一种使用业务速率信息进行拥塞控制的活动队列管理方法和装置。 使用流量控制协议的非线性流体流模型，闭环配置中的比例积分控制器，其特征在于稳定操作的增益设置允许活动TCP连接的总速率与可用容量的匹配。 还公开了一种用于计算给定网络的稳定操作获得的增益设置的方案的方法。 这种方法允许容量匹配，同时保持最小的队列大小和高的链路利用率。

    Adaptive jitter buffer control
    8.
    发明授权
    Adaptive jitter buffer control 有权
    自适应抖动缓冲控制

    公开(公告)号：US07359324B1

    公开(公告)日：2008-04-15

    申请号：US10796321

    申请日：2004-03-09

    申请人： Michel Ouellette ,  Delfin Montuno ,  James Aweya ,  Kent Felske

    发明人： Michel Ouellette ,  Delfin Montuno ,  James Aweya ,  Kent Felske

    IPC分类号： H04L12/26

    CPC分类号： H04L43/087 ,  H04L43/0852

    摘要： A method for dynamically adjusting jitter buffer size according to buffer fill dynamics is disclosed. In one embodiment, an upper threshold and lower threshold for the jitter buffer are identified, wherein the lower buffer threshold identifies a minimum desirable number of packets in the jitter buffer, and the upper buffer threshold identifies a maximum desirable number of packets in the jitter buffer. Operating characteristics of the jitter buffer are monitored to identify instances when the jitter buffer size falls below or exceeds the desired thresholds. When a threshold is crossed, the adaptive algorithm alters the playback offset time, by introducing or deleting packets into the transmission path, to allow the jitter buffer size to return to a desirable target size within the threshold boundaries.

    摘要翻译： 公开了一种根据缓冲区填充动态动态调整抖动缓冲区大小的方法。 在一个实施例中，识别抖动缓冲器的上阈值和下阈值，其中下缓冲器阈值标识抖动缓冲器中最小期望数量的分组，并且高缓冲器阈值识别抖动缓冲器中的最大期望数量的分组 。 当抖动缓冲区大小低于或超过所需阈值时，监视抖动缓冲区的操作特性以识别实例。 当超过阈值时，自适应算法通过将分组引入或删除到传输路径来改变播放偏移时间，以允许抖动缓冲器大小在阈值边界内返回到期望的目标大小。

    Rate-based multi-level active queue management with drop precedence differentiation
    9.
    发明授权
    Rate-based multi-level active queue management with drop precedence differentiation 有权
    基于速率的多级主动队列管理与丢弃优先级差异化

    公开(公告)号：US07336611B1

    公开(公告)日：2008-02-26

    申请号：US10633459

    申请日：2003-08-01

    申请人： James Aweya ,  Michel Ouellette ,  Delfin Montuno ,  Kent Felske

    发明人： James Aweya ,  Michel Ouellette ,  Delfin Montuno ,  Kent Felske

    IPC分类号： H04J1/16

    CPC分类号： H04L47/10 ,  H04L47/193 ,  H04L47/2408 ,  H04L47/263 ,  H04L47/31 ,  H04L47/32

    摘要： Disclosed is a rate-based multi-level Active Queue Management with drop precedence differentiation method and apparatus which uses traffic rate information for congestion control. Using a nonlinear fluid-flow model of Traffic Control Protocol, an integral controller in a closed-loop configuration with gain settings characterized for stable operation allows a matching of the aggregate rate of the active TCP connections to the available capacity. Further disclosed is a method for calculation of the regime of gains over which stable operation of a given network obtains. An enhancement of the basic algorithm provides the ability to drop low-precedence packets in preference to higher precedence packets. This approach allows for a rate-based AQM approach for application in a differentiated service environment.

    摘要翻译： 公开了一种基于速率的多级活动队列管理，其具有使用流量信息进行拥塞控制的丢弃优先级分化方法和装置。 使用流量控制协议的非线性流体流模型，闭环配置的集成控制器具有以稳定操作为特征的增益设置，可以将活动TCP连接的总速率与可用容量进行匹配。 进一步公开的是一种用于计算给定网络获得的稳定运行的增益方案的方法。 基本算法的增强提供了优先级较低的优先级报文丢弃能力。 这种方法允许基于速率的AQM方法在差异化服务环境中应用。

    Three-way message exchange clock synchronization
    10.
    发明授权
    Three-way message exchange clock synchronization 有权
    三路信息交换时钟同步

    公开(公告)号：US07835366B2

    公开(公告)日：2010-11-16

    申请号：US11362697

    申请日：2006-02-27

    申请人： James Aweya ,  Michel Ouellette ,  Delfin Montuno ,  Kent Felske

    发明人： James Aweya ,  Michel Ouellette ,  Delfin Montuno ,  Kent Felske

    IPC分类号： H04L12/28 ,  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机。 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 。