公开(公告)号：US08589530B2

公开(公告)日：2013-11-19

申请号：US11092226

申请日：2005-03-28

申请人： Dimitris Stassinopoulos ,  George Zioulas ,  Han C. Wen

发明人： Dimitris Stassinopoulos ,  George Zioulas ,  Han C. Wen

IPC分类号： G06F15/173

CPC分类号： H04L43/024 ,  H04L41/042 ,  H04L43/062 ,  H04L43/0823 ,  H04L43/0852 ,  H04L43/0876

摘要： Network traffic information for nodes of a first logical hierarchy is stored at a monitoring device according to ranks of the nodes within the logical hierarchy as determined by each node's position therein and user preferences. At least some of the network traffic information stored at the network monitoring device may then be reported to another network monitoring device, where it can be aggregated with similar information from other network monitoring devices. Such reporting may occur according to rankings of inter-node communication links between nodes of different logical hierarchies of monitored nodes.

摘要翻译： 第一逻辑层次结构的节点的网络流量信息根据每个节点在其中的位置确定的逻辑层级中的节点的排列以及用户偏好来存储在监视设备处。 存储在网络监视设备中的网络流量信息中的至少一些可以被报告给另一个网络监控设备，在该监视设备可以将其与来自其他网络监控设备的类似信息进行聚合。 这种报告可以根据受监视节点的不同逻辑层次的节点之间的节点间通信链路的排名而发生。

公开(公告)号：US20140036688A1

公开(公告)日：2014-02-06

申请号：US14051813

申请日：2013-10-11

申请人： Dimitris STASSINOPOULOS ,  George Zioulas ,  Han C. Wen

发明人： Dimitris STASSINOPOULOS ,  George Zioulas ,  Han C. Wen

IPC分类号： H04L12/26

CPC分类号： H04L43/024 ,  H04L41/042 ,  H04L43/062 ,  H04L43/0823 ,  H04L43/0852 ,  H04L43/0876

摘要： Network traffic information for nodes of a first logical hierarchy is stored at a monitoring device according to ranks of the nodes within the logical hierarchy as determined by each node's position therein and user preferences. At least some of the network traffic information stored at the network monitoring device may then be reported to another network monitoring device, where it can be aggregated with similar information from other network monitoring devices. Such reporting may occur according to rankings of inter-node communication links between nodes of different logical hierarchies of monitored nodes.

摘要翻译： 第一逻辑层次结构的节点的网络流量信息根据每个节点在其中的位置确定的逻辑层级中的节点的排列以及用户偏好来存储在监视设备处。 存储在网络监视设备中的网络流量信息中的至少一些可以被报告给另一个网络监控设备，在该监视设备可以将其与来自其他网络监控设备的类似信息进行聚合。 这种报告可以根据受监视节点的不同逻辑层次的节点之间的节点间通信链路的排名而发生。

公开(公告)号：US07443870B2

公开(公告)日：2008-10-28

申请号：US10923576

申请日：2004-08-20

申请人： George Zioulas ,  Dimitris Stassinopoulos ,  Han C. Wen

发明人： George Zioulas ,  Dimitris Stassinopoulos ,  Han C. Wen

IPC分类号： H04L12/56

CPC分类号： H04L47/11 ,  H04L41/0893 ,  H04L43/00 ,  H04L43/026

摘要： Nodes of a network may be allocated to a number of logical groups thereof, and storage space within a network traffic monitoring device coupled to the network then allocated so as to ensure network traffic data for at least a minimum number of the nodes of each of the logical groups is stored.

摘要翻译： 可以将网络的节点分配给其多个逻辑组，以及耦合到网络的网络业务监控设备内的存储空间，然后被分配，以便确保网络业务数据中的每一个的至少最小数量的节点 存储逻辑组。

公开(公告)号：US07337206B1

公开(公告)日：2008-02-26

申请号：US10195904

申请日：2002-07-15

申请人： Han C. Wen ,  Tomas J. Pavel

发明人： Han C. Wen ,  Tomas J. Pavel

IPC分类号： G06F15/16

CPC分类号： H04L47/29 ,  H04L43/00 ,  H04L43/022 ,  H04L43/0829 ,  H04L43/0852 ,  H04L43/0864 ,  H04L43/0882 ,  H04L43/0888 ,  H04L43/0894 ,  H04L43/16 ,  H04L47/10 ,  H04L47/11 ,  H04L47/283

摘要： A baseline for internet traffic duration is established by (i) collecting internet traffic data regarding file size, server response time, packet loss and round trip time, (ii) removing from this data outliers associated with file size, server response time and packet loss per client type, and (iii) organizing any remaining data into round trip time bins according to median values of round trip time per client type. Thereafter, historical or newly collected Internet traffic data is compared against threshold values for each round trip time bin to locate duration outliers. These duration outliers are indicators of congestion and congestion episodes may be identified by the continued presence of such outliers over successive time intervals.

摘要翻译： 互联网流量持续时间的基准是通过（i）收集关于文件大小，服务器响应时间，分组丢失和往返时间的互联网流量数据建立的，（ii）从与文件大小，服务器响应时间和分组丢失相关联的这些数据异常值中移除 根据客户端类型，以及（iii）根据每个客户端类型的往返时间的中值将所有剩余数据组织到往返时间段。 此后，将历史或新收集的因特网流量数据与每个往返时间仓的阈值进行比较以定位持续时间异常值。 这些持续时间异常值是拥塞的指标，并且可以通过连续的时间间隔继续存在这样的异常值来识别拥塞发生。

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。

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.

公开(公告)号：US09055092B2

公开(公告)日：2015-06-09

申请号：US10937986

申请日：2004-09-10

申请人： Han C. Wen ,  George Zloulas ,  Masood Ahmed

发明人： Han C. Wen ,  George Zloulas ,  Masood Ahmed

IPC分类号： G06F15/173 ,  H04L29/06 ,  H04L12/24 ,  H04L12/26 ,  H04M7/00

CPC分类号： H04L63/1408 ,  H04L41/0893 ,  H04L43/0876 ,  H04M7/0084

摘要： Client network traffic data and server network traffic data regarding a number of network nodes is collected and then grouped by IP address. The network nodes are divided into logical groupings and the network traffic data is presented in the aggregate for all IP addresses in each logical group. The logical groupings may be further divided by protocol, application, port and/or logical group-to-group. Each logical group can be further generalized as either a set of IP addresses (e.g., a business group) or a specific logical link between one set of IP addresses to another set of IP addresses (e.g., a business group link). Either or both of these “groups” may be divided in further logical sub-groups: for example, by protocol, application, port and in the case of business groups, group-to-group. The logical groups provide facilities for initial problem detection and identification while the logical sub-groups provide facilities for troubleshooting and problem isolation.

摘要翻译： 收集关于多个网络节点的客户端网络流量数据和服务器网络流量数据，然后按IP地址分组。 网络节点分为逻辑分组，网络流量数据以每个逻辑组中的所有IP地址的汇总形式呈现。 逻辑组可以进一步由协议，应用，端口和/或逻辑组到组进一步划分。 每个逻辑组可以进一步推广为一组IP地址（例如，业务组）或一组IP地址之间的特定逻辑链路到另一组IP地址（例如，业务组链路）。 这些“组”中的任何一个或两个可以被分成另外的逻辑子组：例如，通过协议，应用，端口以及在业务组的情况下，组到组。 逻辑组提供初始问题检测和识别的设施，而逻辑子组提供故障排除和问题隔离的设施。

公开(公告)号：US06928472B1

公开(公告)日：2005-08-09

申请号：US10205101

申请日：2002-07-23

申请人： Han C. Wen

发明人： Han C. Wen

IPC分类号： G06F15/173 ,  H04L12/24 ,  H04L12/26

CPC分类号： H04L43/0864 ,  H04L41/142 ,  H04L41/22 ,  H04L41/5009 ,  H04L43/045 ,  H04L43/0829 ,  H04L43/106

摘要： For each of a number of network performance metrics, an associated value rpm that represents a difference between a first correlation coefficient r1 computed for a baseline data set and a second correlation coefficient r2 computed for a second data set that includes the baseline data set and other data points classified as duration outliers is computed. The first and second correlation coefficients for each network performance metric represent correlation between that network performance metric and durations of network connections. The network performance metric that has a largest associated rpm value of all rpm values computed is selected as representing the probable root cause of the duration outliers.

摘要翻译： 对于多个网络性能度量中的每一个，表示针对基线数据集计算的第一相关系数r 1与第二相关性之间的差的相关联的值r < 计算对于包括基线数据集和分类为持续时间异常值的其他数据点的第二数据集计算的系数r 2 2 。 每个网络性能度量的第一和第二相关系数表示该网络性能度量和网络连接的持续时间之间的相关性。 选择所计算的所有r个pm 值相关联的最大相关值的网络性能指标，表示持续时间异常值的可能根本原因。

公开(公告)号：US06674717B1

公开(公告)日：2004-01-06

申请号：US09539434

申请日：2000-03-30

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

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

IPC分类号： H04L1226

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

摘要： End-to-end packet losses of one or more traffic streams transmitted across a congested network may be reduced by modulating the bandwidths of the corresponding traffic streams applied to node(s) of the network from one or more control points along the network topology. This reduction in packet loss results in a reduction in fluctuations or variability of the controlled traffic streams, an increase in bandwidth utilization and a reduction in times to transmit files. The control points can be either upstream or downstream of one or more congestion points along the network. The modulation of the bandwidths are governed by a nonlinear differential equation that involves feedback of the throughput and buffer occupancy level. The control terms involve a relaxation time, coupling constant, control constant and nonlinear feedback constants.

摘要翻译： 可以通过沿着网络拓扑从一个或多个控制点调制应用于网络节点的相应业务流的带宽来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。 分组丢失的这种减少导致受控业务流的波动或变化的减少，带宽利用率的增加和传输文件的次数的减少。 控制点可以是沿着网络的一个或多个拥塞点的上游或下游。 带宽的调制由涉及吞吐量和缓冲器占用等级的反馈的非线性微分方程控制。 控制项涉及松弛时间，耦合常数，控制常数和非线性反馈常数。

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。