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公开(公告)号：US20080273460A1
公开(公告)日：2008-11-06
申请号：US11782895
申请日：2007-07-25
CPC分类号： H04L67/1095 , H04J3/0635 , H04L7/02
摘要： A system for synchronizing a first network device and a second network device. The first network device comprises an interface configured to release over a communication link a first signal carrying a first data stream clocked by a first clock signal. The second network device comprises an interface configured to receive the first signal over the communication link. The second network device also comprises a clock extraction module configured to generate an extracted clock signal from the received first signal; and a data coding module configured to clock a second data stream with an output clock signal selected based on a speed of a locally generated clock signal relative to the first clock signal or the extracted clock signal, thereby to produce a second signal for transmission from the second network element to the first network element. By clocking the second data stream with the fastest available clock signal, greater link utilization can be achieved. Furthermore, synchronism between the first and second network elements reduces the incidence of sync slips, which permits a reduction in the size of inter-frame gaps and also affords the use of a clock frequencies exceeding the nominal rate, leading to even greater link utilization.
摘要翻译： 一种用于同步第一网络设备和第二网络设备的系统。 第一网络设备包括被配置为通过通信链路释放承载由第一时钟信号定时的第一数据流的第一信号的接口。 第二网络设备包括被配置为通过通信链路接收第一信号的接口。 第二网络设备还包括：时钟提取模块，被配置为从接收到的第一信号产生提取的时钟信号; 以及数据编码模块，被配置为使用基于相对于所述第一时钟信号或所提取的时钟信号的本地生成的时钟信号的速度选择的输出时钟信号对第二数据流进行时钟，由此产生用于从 第二网络元件到第一网络元件。 通过以最快的可用时钟信号计时第二数据流，可以实现更大的链路利用率。 此外，第一和第二网络元件之间的同步减少了同步滑移的入射，这允许减小帧间间隙的大小，并且还提供使用超过标称速率的时钟频率，导致甚至更大的链路利用率。
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公开(公告)号：US08467417B2
公开(公告)日：2013-06-18
申请号：US11782895
申请日：2007-07-25
IPC分类号： H04J3/06
CPC分类号： H04L67/1095 , H04J3/0635 , H04L7/02
摘要： A system for synchronizing a first network device and a second network device. The first network device comprises an interface configured to release over a communication link a first signal carrying a first data stream clocked by a first clock signal. The second network device comprises an interface configured to receive the first signal over the communication link. The second network device also comprises a clock extraction module configured to generate an extracted clock signal from the received first signal; and a data coding module configured to clock a second data stream with an output clock signal selected based on a speed of a locally generated clock signal relative to the first clock signal or the extracted clock signal, thereby to produce a second signal for transmission from the second network element to the first network element. By clocking the second data stream with the fastest available clock signal, greater link utilization can be achieved. Furthermore, synchronism between the first and second network elements reduces the incidence of sync slips, which permits a reduction in the size of inter-frame gaps and also affords the use of a clock frequencies exceeding the nominal rate, leading to even greater link utilization.
摘要翻译： 一种用于同步第一网络设备和第二网络设备的系统。 第一网络设备包括被配置为通过通信链路释放承载由第一时钟信号定时的第一数据流的第一信号的接口。 第二网络设备包括被配置为通过通信链路接收第一信号的接口。 第二网络设备还包括：时钟提取模块，被配置为从接收到的第一信号产生提取的时钟信号; 以及数据编码模块，被配置为使用基于相对于所述第一时钟信号或所提取的时钟信号的本地生成的时钟信号的速度选择的输出时钟信号对第二数据流进行时钟，由此产生用于从 第二网络元件到第一网络元件。 通过以最快的可用时钟信号计时第二数据流，可以实现更大的链路利用率。 此外，第一和第二网络元件之间的同步减少了同步滑移的入射，这允许减小帧间间隙的大小，并且还提供使用超过标称速率的时钟频率，导致甚至更大的链路利用率。
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公开(公告)号：US08675686B2
公开(公告)日：2014-03-18
申请号：US13162242
申请日：2011-06-16
申请人： James Aweya , Michel Ouellette
发明人： James Aweya , Michel Ouellette
IPC分类号： H04J3/06
CPC分类号： H04J3/065 , H04J3/0682 , H04J3/0697 , H04L67/06 , H04W56/0055
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。
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公开(公告)号：US08559412B1
公开(公告)日：2013-10-15
申请号：US12006151
申请日：2007-12-31
IPC分类号： H03D3/24
CPC分类号： H04W56/0015 , G06F1/12 , H04J3/0664 , H04J3/0667 , H04J3/0673
摘要： A first node in a network receives a timing packet containing time information, where the timing packet is originated by a time server. The first node then updates the time information in the timing packet to reflect a delay associated with communicating the timing packet over a network link. The first node then updates the time information in the timing packet to reflect the delay associated transfer of the timing packet through the node. The first node sends the timing packet with the updated time information to a second node to enable the second node to use the updated time information for synchronization of the second node. The process repeats across an arbitrary number of nodes to enable time alignment between the first node and final destination node.
摘要翻译： 网络中的第一节点接收包含时间信息的定时分组，其中定时分组由时间服务器发起。 然后，第一节点更新定时分组中的时间信息，以反映与通过网络链路传送定时分组相关联的延迟。 然后，第一节点更新定时分组中的时间信息，以反映通过节点的定时分组的延迟相关传输。 第一节点将具有更新的时间信息的定时分组发送到第二节点，以使第二节点能够使用更新的时间信息用于第二节点的同步。 该过程在任意数量的节点上重复以实现第一节点和最终目的地节点之间的时间对准。
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5.发明申请公开(公告)号：US20110199941A1
公开(公告)日：2011-08-18
申请号：US13028656
申请日：2011-02-16
IPC分类号： H04L12/56
CPC分类号： H04L12/1836 , G06F1/14
摘要： In at least some embodiments, the disclosure includes an apparatus a root node in a packet based network that multicasts a plurality of packets. The apparatus also includes an intermediary node coupled to the root node and a plurality of leaf nodes coupled to the intermediary node. The root node, the intermediary node, and the plurality of leaf nodes are arranged in a tree topology. The packets are received at the intermediary node from the root node at a data rate equal to the data rate of the leaf node having the maximum data rate. The packets are multicast from the intermediary node to each of the plurality of leaf nodes at a plurality of different data rates such that each particular one of the plurality of leaf nodes receives the packets at a data rate corresponding to the data rate for the particular one of the plurality of leaf nodes.
摘要翻译： 在至少一些实施例中，本公开包括：设备，基于分组的网络中的根节点，其组播多个分组。 该装置还包括耦合到根节点的中间节点和耦合到中间节点的多个叶节点。 根节点，中间节点和多个叶节点以树形拓扑布置。 以等于具有最大数据速率的叶节点的数据速率的数据速率从根节点在中间节点处接收分组。 分组以多个不同的数据速率从中间节点多播到多个叶节点中的每一个，使得多个叶节点中的每个特定的叶节点以对应于特定一个叶节点的数据速率的数据速率接收分组 的多个叶节点。
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公开(公告)号：US20100080248A1
公开(公告)日：2010-04-01
申请号：US12347314
申请日：2008-12-31
申请人： James Aweya , Michel Ouellette
发明人： James Aweya , Michel Ouellette
IPC分类号： H04J3/06
CPC分类号： H04J3/065 , H04J3/0682 , H04J3/0697 , H04L67/06 , H04W56/0055
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。
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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。
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公开(公告)号：US07336672B1
公开(公告)日：2008-02-26
申请号：US10422796
申请日：2003-04-25
IPC分类号： H04L12/28
CPC分类号： H04L47/10 , H04L47/283 , H04L47/30 , H04L47/32
摘要： Various techniques for queue management based on random early detection (RED) are disclosed herein. In particular, a method for generating a drop probability for an incoming packet in a device having a queue to buffer packets between segments of a network is provided. The method comprises determining, upon receipt of an incoming packet, a size of the queue and determining an error based at least in part on a difference between the queue size and a threshold. The method further comprises determining a drop probability for the incoming packet based at least in part on the error and a constant gain factor. The constant gain factor may be based at least in part on a linearized second order dynamic model of the network.
摘要翻译： 本文中公开了基于随机早期检测（RED）的队列管理的各种技术。 特别地，提供了一种用于在具有队列以在网络的段之间缓冲分组的设备中生成用于输入分组的丢弃概率的方法。 该方法包括在接收到传入分组时确定队列的大小并且至少部分地基于队列大小与阈值之间的差异来确定错误。 该方法还包括至少部分地基于误差和恒定增益因子确定输入分组的丢弃概率。 恒定增益因子可以至少部分地基于网络的线性化二阶动态模型。
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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 。
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10.发明授权Method, apparatus, media, and signals for controlling packet transmission rate from a packet source 失效用于控制来自分组源的分组传输速率的方法，装置，媒体和信号公开(公告)号：US06894974B1
公开(公告)日：2005-05-17
申请号：US09566391
申请日：2000-05-08
申请人： James Aweva , Michel Ouellette , Delfin Y. Montuno
发明人： James Aweva , Michel Ouellette , Delfin Y. Montuno
CPC分类号： H04L1/1607 , H04L1/0001 , H04L1/1825 , H04L1/1835 , H04L47/10 , H04L47/263 , H04L47/30
摘要： A method, apparatus, computer readable media and signal embodied in a carrier wave for controlling the rate at which data packets are transmitted from a source responsive to acknowledgement signals in a packet network involves adjusting an acknowledgement rate at which acknowledgement signals are sent to the source, in response to the difference between target queue occupancy and measured queue occupancy of a queue buffer in which data packets from the source are received.
摘要翻译： 包含在载波中的方法，装置，计算机可读介质和信号，用于响应于分组网络中的确认信号来控制从源发送数据分组的速率，包括调整确认信号被发送到源的确认速率 响应于来自源的数据分组的队列缓冲器的目标队列占用与测量队列占有率之间的差异。
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