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    Method of reducing packet loss by resonance identification in communication networks
    1.
    发明授权
    Method of reducing packet loss by resonance identification in communication networks 有权
    通信网络中通过共振识别减少丢包的方法

    公开(公告)号：US07551560B1

    公开(公告)日：2009-06-23

    申请号：US09846451

    申请日：2001-04-30

    申请人： Minh Duong-van ,  Han C. Wen ,  Mark Crane ,  Tomas J. Pavel

    发明人： Minh Duong-van ,  Han C. Wen ,  Mark Crane ,  Tomas J. Pavel

    IPC分类号： H04L12/26

    CPC分类号： H04L47/10 ,  H04L43/0864 ,  H04L47/22 ,  H04L47/25 ,  H04L47/283

    摘要： A control node of a communication network is operated at a packet bandwidth determined according to observations of performance metrics of the network at the control point. These performance metrics may be one or more of throughput, average fetch time and packet loss. The control node is operated so as to set a control bandwidth to corresponding resonance points of the performance metrics. The resonance points are determined by scanning across a range of control bandwidths, until one or more of the performance metrics is/are optimized. The packet bandwidth is set by varying an inter-packet delay time over selected communication links at the control node.

    摘要翻译： 通信网络的控制节点以根据在控制点的网络的性能度量的观察确定的分组带宽操作。 这些性能度量可以是吞吐量，平均获取时间和分组丢失中的一个或多个。 控制节点被操作以便将控制带宽设置到性能度量的相应共振点。 共振点通过扫描跨越一定范围的控制带宽来确定，直到性能度量的一个或多个被优化为止。 通过在控制节点处通过选择的通信链路改变分组间延迟时间来设置分组带宽。

    Method for reducing fetch time in a congested communication network
    2.
    发明授权
    Method for reducing fetch time in a congested communication network 有权

    公开(公告)号：US06990071B2

    公开(公告)日：2006-01-24

    申请号：US09846174

    申请日：2001-04-30

    申请人： Ian Adam ,  Tomas J. Pavel ,  Han C. Wen ,  Minh Duong-van ,  Mark Crane

    发明人： Ian Adam ,  Tomas J. Pavel ,  Han C. Wen ,  Minh Duong-van ,  Mark Crane

    IPC分类号： H04L12/26

    CPC分类号： H04L12/5602 ,  H04L2012/5635 ,  H04L2012/5636 ,  H04L2012/5647 ,  H04L2012/568 ,  H04Q11/0478

    摘要： Congestion within a communication is controlled by rate limiting packet transmissions over selected communication links within the network and modulating the rate limiting according to buffer occupancies at control nodes within the network. Preferably, though not necessarily, the rate limiting of the packet transmissions is performed at an aggregate level for all traffic streams utilizing the selected communication links. The rate limiting may also be performed dynamically in response to measured network performance metrics; such as the throughput of the selected communication links input to the control points and/or the buffer occupancy level at the control points. The network performance metrics may be measured according to at least one of: a moving average of the measured quantity, a standard average of the measured quantity, or another filtered average of the measured quantity. The rate limiting may be achieved by varying an inter-packet delay time over the selected communication links at the control points. The control points themselves may be located upstream or even downstream (or both) of congested nodes within the network and need only be located on only a few of a number of communication links that are coupled to a congested node within the network. More generally, the control points need only be associated with a fraction of the total number of traffic streams applied to a congested node within the network.

    Method for reducing packet loss by phase transition identification in communication networks
    3.
    发明授权
    Method for reducing packet loss by phase transition identification in communication networks 有权
    通信网络中通过相变标识减少丢包的方法

    公开(公告)号：US06947381B2

    公开(公告)日：2005-09-20

    申请号：US09846449

    申请日：2001-04-30

    申请人： Han C. Wen ,  Minh Duong-van ,  Tomas J. Pavel ,  Mark Crane

    发明人： Han C. Wen ,  Minh Duong-van ,  Tomas J. Pavel ,  Mark Crane

    IPC分类号： G06F11/00 ,  H04J3/14 ,  H04L12/26

    CPC分类号： H04L43/0829

    摘要： End-to-end packet losses of one or more traffic streams transmitted across a congested network may be reduced by setting the bandwidths of the corresponding traffic streams at critical values thereof at one or more control points along the network topology. The critical value of the bandwidths may be determined by monitoring buffer occupancy at the control point(s). Buffer occupancy may be determined by periodically sweeping down from a maximum bandwidth value according to a monotonically decaying exponential function.

    摘要翻译： 通过在网络拓扑的一个或多个控制点将相应业务流的带宽设置为临界值，可以减少在拥塞网络上传输的一个或多个业务流的端到端分组丢失。 带宽的临界值可以通过监视控制点处的缓冲器占用来确定。 可以通过根据单调衰减指数函数从最大带宽值周期性地向下扫描来确定缓冲器占用。

    Method for accelerating TCP flows in communication networks with dynamic control
    4.
    发明授权
    Method for accelerating TCP flows in communication networks with dynamic control 有权
    在动态控制通信网络中加速TCP流的方法

    公开(公告)号：US07333431B2

    公开(公告)日：2008-02-19

    申请号：US09846452

    申请日：2001-04-30

    申请人： Han C. Wen ,  Ian Adam ,  Minh Duong-van ,  Tomas J. Pavel ,  Mark Crane

    发明人： Han C. Wen ,  Ian Adam ,  Minh Duong-van ,  Tomas J. Pavel ,  Mark Crane

    IPC分类号： H04L12/56

    CPC分类号： H04L12/5602 ,  H04L2012/5635 ,  H04L2012/5636 ,  H04L2012/5647 ,  H04L2012/568 ,  H04Q11/0478

    摘要： Predictions of congestion conditions for a traffic stream in a communication network are applied to modify an initial congestion window size for the traffic stream; and dynamic bandwidth control is thereafter applied to the traffic stream. This dynamic bandwidth control may include modulating inter-packet bandwidths of the traffic stream according to a capacity of a bottleneck in a communication path through which the traffic stream passes in the communication network. The predictions of congestion conditions may be based on monitoring packet losses and/or round trip times within the communication network for a selected period of time. The monitoring may be performed on at least one of a traffic stream-by traffic stream basis, a connection-by-connection basis, a link-by-link basis, or a destination-by-destination basis.

    摘要翻译： 应用通信网络中的业务流的拥塞状况的预测来修改业务流的初始拥塞窗口大小; 然后将动态带宽控制应用于业务流。 该动态带宽控制可以包括根据业务流在通信网络中通过的通信路径中的瓶颈的容量来调制业务流的分组间带宽。 拥塞状况的预测可以基于在选定的时间段内监视通信网络内的分组丢失和/或往返时间。 监视可以基于业务流，业务流，基于连接的连接，逐个链路的基础或目的地的目的地中的至少一个来执行。

    Distributed network monitoring system
    5.
    发明申请
    Distributed network monitoring system 审中-公开
    分布式网络监控系统

    公开(公告)号：US20060280207A1

    公开(公告)日：2006-12-14

    申请号：US11148055

    申请日：2005-06-08

    申请人： Stephen Guarini ,  Tomas Pavel ,  Mark Crane ,  Erik Seilnacht ,  Romain Kang

    发明人： Stephen Guarini ,  Tomas Pavel ,  Mark Crane ,  Erik Seilnacht ,  Romain Kang

    IPC分类号： H04J3/12

    CPC分类号： H04L43/12 ,  H04L41/0853 ,  H04L63/0428

    摘要： A distributed network monitoring system includes a central monitoring device configured to store global configuration information for all monitoring devices which make up the distributed system, and one or more remote monitoring devices configured to receive, in response to a request therefor, at least a portion of the configuration information from the central monitoring device. The remote monitoring devices and the central monitoring device may be communicatively coupled through respective secure communications paths (e.g., SSH communication tunnels) established on an as-needed basis by secure communication tunnel processes executing at the central monitoring device and remote monitoring devices. The central network monitoring device may further include a configuration servlet configured to provide requested portions of the configuration information to the one or more remote monitoring devices.

    摘要翻译： 分布式网络监控系统包括中央监控设备，其配置为存储构成分布式系统的所有监控设备的全局配置信息，以及一个或多个远程监控设备，被配置为响应于该请求而接收至少一部分 来自中央监控设备的配置信息。 远程监视设备和中央监控设备可以通过在中央监控设备和远程监控设备上执行的安全通信隧道进程在根据需要建立的相应的安全通信路径（例如，SSH通信隧道）上进行通信耦合。 中央网络监视设备还可以包括被配置为向所述一个或多个远程监视设备提供所述配置信息的所请求部分的配置小服务器。