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1. 发明申请

US20110013525A1 Indirect measurement methodology to infer routing changes using statistics of flow arrival processes 有权
标题翻译：使用统计流量到达过程来推断路由更改的间接测量方法
公开(公告)号：US20110013525A1
公开(公告)日：2011-01-20
申请号：US12460113
申请日：2009-07-14
申请人： Lee Breslau , Amogh Dhamdhere , Nicholas Duffield , Cheng Ee , Alexandre Gerber , Carsten Lund , Subhabrata Sen
发明人： Lee Breslau , Amogh Dhamdhere , Nicholas Duffield , Cheng Ee , Alexandre Gerber , Carsten Lund , Subhabrata Sen
IPC分类号： H04L12/26 , H04L12/56
CPC分类号： H04L43/18 , H04L43/062 , H04L45/70
摘要： Statistical methods are used to observe packet flow arrival processes and to infer routing changes from those observations. Packet flow arrivals are monitored using NetFlow or another packet flow monitoring arrangement. Packet flow arrivals are quantified by counting arrivals per unit time, or by measuring an inter-arrival time between flows. When a change in packet flow arrivals is determined to be statistically significant, a change in network routing protocol is reported.
摘要翻译：统计方法用于观察分组流到达过程，并从这些观察中推断出路由变化。使用NetFlow或另一个分组流监视装置来监视分组流到达。通过对每单位时间的到达时间进行计数，或通过测量流之间的到达之间的时间来量化分组流到达。当分组流到达的变化被确定为具有统计学意义时，报告了网络路由协议的变化。

2. 发明授权

US08477772B2 System and method for determination of routing information in a network 有权
标题翻译：用于确定网络中路由信息的系统和方法
公开(公告)号：US08477772B2
公开(公告)日：2013-07-02
申请号：US12335868
申请日：2008-12-16
申请人： Alexandre Gerber , Lee Breslau , Subhabrata Sen , Nicholas Duffield , Carsten Lund , Cheng Ee , Amogh Dhamdhere
发明人： Alexandre Gerber , Lee Breslau , Subhabrata Sen , Nicholas Duffield , Carsten Lund , Cheng Ee , Amogh Dhamdhere
IPC分类号： H04L12/56
CPC分类号： H04L12/56 , H04L41/12 , H04L45/70
摘要： A system and method to use network flow records to generate information about changes in network routing and to understand the impact of these changes on network traffic. The inferences made can be determinative, if sufficient information is available. If sufficient information is not available to make determinative inferences, inferences may be made that narrow the range of possible changes that may have occurred to network traffic and the underlying network.
摘要翻译：一种使用网络流记录生成有关网络路由更改的信息并了解这些更改对网络流量的影响的系统和方法。如果有足够的信息可用，所做的推论可以是决定性的。如果没有足够的信息可用于作出决定性推论，可以推测可能缩小网络流量和底层网络可能发生的可能变化的范围。

3. 发明授权

US08165019B2 Indirect measurement methodology to infer routing changes using statistics of flow arrival processes 有权
标题翻译：使用统计流量到达过程来推断路由更改的间接测量方法
公开(公告)号：US08165019B2
公开(公告)日：2012-04-24
申请号：US12460113
申请日：2009-07-14
申请人： Lee Breslau , Amogh Dhamdhere , Nicholas Duffield , Cheng Ee , Alexandre Gerber , Carsten Lund , Subhabrata Sen
发明人： Lee Breslau , Amogh Dhamdhere , Nicholas Duffield , Cheng Ee , Alexandre Gerber , Carsten Lund , Subhabrata Sen
IPC分类号： H04L12/26 , H04L12/56
CPC分类号： H04L43/18 , H04L43/062 , H04L45/70
摘要： Statistical methods are used to observe packet flow arrival processes and to infer routing changes from those observations. Packet flow arrivals are monitored using NetFlow or another packet flow monitoring arrangement. Packet flow arrivals are quantified by counting arrivals per unit time, or by measuring an inter-arrival time between flows. When a change in packet flow arrivals is determined to be statistically significant, a change in network routing protocol is reported.
摘要翻译：统计方法用于观察分组流到达过程，并从这些观察中推断出路由变化。使用NetFlow或另一个分组流监视装置来监视分组流到达。通过对每单位时间的到达时间进行计数，或通过测量流之间的到达之间的时间来量化分组流到达。当分组流到达的变化被确定为具有统计学意义时，报告了网络路由协议的变化。

4. 发明申请

US20100150005A1 SYSTEM AND METHOD FOR DETERMINATION OF ROUTING INFORMATION IN A NETWORK 有权
标题翻译：用于确定网络中路由信息的系统和方法
公开(公告)号：US20100150005A1
公开(公告)日：2010-06-17
申请号：US12335868
申请日：2008-12-16
申请人： Alexandre Gerber , Lee Breslau , Subhabrata Sen , Nicholas Duffield , Carsten Lund , Cheng Ee , Amogh Dhamdhere
发明人： Alexandre Gerber , Lee Breslau , Subhabrata Sen , Nicholas Duffield , Carsten Lund , Cheng Ee , Amogh Dhamdhere
IPC分类号： H04L12/26 , H04L12/56
CPC分类号： H04L12/56 , H04L41/12 , H04L45/70
摘要： A system and method to use network flow records to generate information about changes in network routing and to understand the impact of these changes on network traffic. The inferences made can be determinative, if sufficient information is available. If sufficient information is not available to make determinative inferences, inferences may be made that narrow the range of possible changes that may have occurred to network traffic and the underlying network.
摘要翻译：一种使用网络流记录生成有关网络路由更改的信息并了解这些更改对网络流量的影响的系统和方法。如果有足够的信息可用，所做的推论可以是决定性的。如果没有足够的信息可用于作出决定性推论，可以推测可能缩小网络流量和底层网络可能发生的可能变化的范围。

5. 发明授权

US07924739B2 Method and apparatus for one-way passive loss measurements using sampled flow statistics 有权
标题翻译：使用采样流统计的单向无源损耗测量的方法和装置
公开(公告)号：US07924739B2
公开(公告)日：2011-04-12
申请号：US12317420
申请日：2008-12-22
申请人： Subhabrata Sen , Lee Breslau , Nicholas Duffield , Yu Gu
发明人： Subhabrata Sen , Lee Breslau , Nicholas Duffield , Yu Gu
IPC分类号： H04J3/14 , H04L12/26 , G06F11/30
CPC分类号： H04L43/0835 , H04L41/0213 , H04L41/142 , H04L41/5009 , H04L43/026 , H04L43/103 , Y02D50/30
摘要： A packet loss estimation technique is disclosed that utilizes the sampled flow level statistics that are routinely collected in operational networks, thereby obviating the need for any new router features or measurement infrastructure. The technique is specifically designed to handle the challenges of sampled flow-level aggregation such as information loss resulting from packet sampling, and generally comprises: receiving a first record of sampled packets for a flow from a first network element; receiving a second record of sampled packets for the flow from a second network element communicating with the first network element; correlating sampled packets from the flow at the first network element and the second network element to a measurement interval; and estimating the packet loss using a count of the sampled packets correlated to the measurement interval.
摘要翻译：公开了一种利用在操作网络中常规收集的采样流量统计信息的分组丢失估计技术，从而避免了对任何新的路由器特征或测量基础设施的需要。该技术专门设计用于处理采样流级聚合的挑战，例如由分组采样导致的信息丢失，并且通常包括：从第一网络元件接收流的第一采样分组记录; 从与第一网络元件通信的第二网络元件接收用于流的采样分组的第二记录; 将来自第一网元和第二网元的流的采样分组相关联到测量间隔; 以及使用与测量间隔相关联的采样分组的计数来估计分组丢失。

6. 发明授权

US08005010B2 Method and apparatus for providing performance measurement for a network tunnel 有权
标题翻译：为网络隧道提供性能测量的方法和装置
公开(公告)号：US08005010B2
公开(公告)日：2011-08-23
申请号：US12022733
申请日：2008-01-30
申请人： Lee Breslau , Nicholas Duffield , Yu Gu , Subhabrata Sen
发明人： Lee Breslau , Nicholas Duffield , Yu Gu , Subhabrata Sen
IPC分类号： H04L12/26
CPC分类号： H04L12/4633 , H04L43/0864
摘要： A method and apparatus for providing performance measurements on network tunnels in packet networks are disclosed. For example, the method establishes two tunnels between a first measurement host and a first router, and establishes a tunnel between the first router and a second measurement host. The method also establishes a multicast group having a plurality of members, and sends one or more packets addressed to the multicast group from the first measurement host. The method measures the frequencies of directly and/or indirectly received responses from the plurality of members of the multicast group, and provides a plurality of estimated values for a plurality of packet transmission rates from measurement of the frequencies for one or more of said tunnels.
摘要翻译：公开了一种用于在分组网络中的网络隧道上提供性能测量的方法和装置。例如，该方法在第一测量主机和第一路由器之间建立两个隧道，并在第一路由器和第二测量主机之间建立隧道。该方法还建立具有多个成员的多播组，并且从第一测量主机发送寻址到多播组的一个或多个分组。该方法测量来自多播组的多个成员的直接和/或间接接收的响应的频率，并从测量一个或多个所述隧道的频率提供多个分组传输速率的多个估计值。

7. 发明申请

US20100157840A1 Method and apparatus for one-way passive loss measurements using sampled flow statistics 有权
标题翻译：使用采样流统计的单向无源损耗测量的方法和装置
公开(公告)号：US20100157840A1
公开(公告)日：2010-06-24
申请号：US12317420
申请日：2008-12-22
申请人： Subhabrata Sen , Lee Breslau , Nicholas Duffield , Yu Gu
发明人： Subhabrata Sen , Lee Breslau , Nicholas Duffield , Yu Gu
IPC分类号： G06F11/30
CPC分类号： H04L43/0835 , H04L41/0213 , H04L41/142 , H04L41/5009 , H04L43/026 , H04L43/103 , Y02D50/30
摘要： A packet loss estimation technique is disclosed that utilizes the sampled flow level statistics that are routinely collected in operational networks, thereby obviating the need for any new router features or measurement infrastructure. The technique is specifically designed to handle the challenges of sampled flow-level aggregation such as information loss resulting from packet sampling, and generally comprises: receiving a first record of sampled packets for a flow from a first network element; receiving a second record of sampled packets for the flow from a second network element communicating with the first network element; correlating sampled packets from the flow at the first network element and the second network element to a measurement interval; and estimating the packet loss using a count of the sampled packets correlated to the measurement interval.
摘要翻译：公开了一种利用在操作网络中常规收集的采样流量统计信息的分组丢失估计技术，从而避免了对任何新的路由器特征或测量基础设施的需要。该技术专门设计用于处理采样流级聚合的挑战，例如由分组采样导致的信息丢失，并且通常包括：从第一网络元件接收流的第一采样分组记录; 从与第一网络元件通信的第二网络元件接收用于流的采样分组的第二记录; 将来自第一网元和第二网元的流的采样分组相关联到测量间隔; 以及使用与测量间隔相关联的采样分组的计数来估计分组丢失。

8. 发明申请

US20090190487A1 METHOD AND APPARATUS FOR PROVIDING PERFORMANCE MEASUREMENT FOR A NETWORK TUNNEL 有权
标题翻译：提供网络隧道性能测量的方法和装置
公开(公告)号：US20090190487A1
公开(公告)日：2009-07-30
申请号：US12022733
申请日：2008-01-30
申请人： Lee Breslau , Nicholas Duffield , Yu Gu , Subhabrata Sen
发明人： Lee Breslau , Nicholas Duffield , Yu Gu , Subhabrata Sen
IPC分类号： H04L12/26
CPC分类号： H04L12/4633 , H04L43/0864
摘要： A method and apparatus for providing performance measurements on network tunnels in packet networks are disclosed. For example, the method establishes two tunnels between a first measurement host and a first router, and establishes a tunnel between the first router and a second measurement host. The method also establishes a multicast group having a plurality of members, and sends one or more packets addressed to the multicast group from the first measurement host. The method measures the frequencies of directly and/or indirectly received responses from the plurality of members of the multicast group, and provides a plurality of estimated values for a plurality of packet transmission rates from measurement of the frequencies for one or more of said tunnels.
摘要翻译：公开了一种用于在分组网络中的网络隧道上提供性能测量的方法和装置。例如，该方法在第一测量主机和第一路由器之间建立两个隧道，并在第一路由器和第二测量主机之间建立隧道。该方法还建立具有多个成员的多播组，并且从第一测量主机发送寻址到多播组的一个或多个分组。该方法测量来自多播组的多个成员的直接和/或间接接收的响应的频率，并从测量一个或多个所述隧道的频率提供多个分组传输速率的多个估计值。

9. 发明授权

US07953020B2 Method for implementing and reporting one-way network measurements 有权
标题翻译：实现和报告单向网络测量的方法
公开(公告)号：US07953020B2
公开(公告)日：2011-05-31
申请号：US11478948
申请日：2006-06-30
申请人： Lee Breslau , Nicholas G. Duffield , Subhabrata Sen
发明人： Lee Breslau , Nicholas G. Duffield , Subhabrata Sen
IPC分类号： H04L12/28
CPC分类号： H04L43/10 , H04L43/026 , H04L43/50 , Y02D50/30
摘要： A method is disclosed for implementing and reporting network measurements between a source of probe packets and an element, such as a router. The invention exploits commonly implemented features on commercial elements. By exploiting these features, the expense of deploying special purpose measurement devices can be avoided. In one aspect of the invention, a plurality of probe packets is transmitted in a packet network with each of the probe packets having the same key and the same aggregation characteristic. A report is then received from an instructionless element regarding the plurality of probe packets, thereby enabling measurement of a parameter of the packet network.
摘要翻译：公开了一种用于实现和报告探测分组的源和诸如路由器的元件之间的网络测量的方法。本发明利用了商业元素上普遍实现的功能。通过利用这些功能，可以避免部署专用测量设备的费用。在本发明的一个方面，在分组网络中发送多个探测分组，每个探测分组具有相同的密钥和相同的聚合特性。然后从关于多个探测分组的无指令元素接收到报告，从而能够测量分组网络的参数。

10. 发明申请

US20070268882A1 Method for implementing and reporting one-way network measurements 有权
标题翻译：实现和报告单向网络测量的方法
公开(公告)号：US20070268882A1
公开(公告)日：2007-11-22
申请号：US11478948
申请日：2006-06-30
申请人： Lee Breslau , Nicholas G. Duffield , Subhabrata Sen
发明人： Lee Breslau , Nicholas G. Duffield , Subhabrata Sen
IPC分类号： H04J3/16
CPC分类号： H04L43/10 , H04L43/026 , H04L43/50 , Y02D50/30
摘要： A method is disclosed for implementing and reporting network measurements between a source of probe packets and an element, such as a router. The invention exploits commonly implemented features on commercial elements. By exploiting these features, the expense of deploying special purpose measurement devices can be avoided. In one aspect of the invention, a plurality of probe packets is transmitted in a packet network with each of the probe packets having the same key and the same aggregation characteristic. A report is then received from an instructionless element regarding the plurality of probe packets, thereby enabling measurement of a parameter of the packet network.
摘要翻译：公开了一种用于实现和报告探测分组的源和诸如路由器的元件之间的网络测量的方法。本发明利用了商业元素上普遍实现的功能。通过利用这些功能，可以避免部署专用测量设备的费用。在本发明的一个方面，在分组网络中发送多个探测分组，每个探测分组具有相同的密钥和相同的聚合特性。然后从关于多个探测分组的无指令元素接收到报告，从而能够测量分组网络的参数。

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