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1. 发明授权

US07219047B2 Simulation with convergence-detection skip-ahead 有权
标题翻译：模拟与收敛检测跳过
公开(公告)号：US07219047B2
公开(公告)日：2007-05-15
申请号：US10112179
申请日：2002-03-28
申请人： Alain Cohen , Pradeep K. Singh , Arun Pasupathy , Stefan Znam
发明人： Alain Cohen , Pradeep K. Singh , Arun Pasupathy , Stefan Znam
IPC分类号： G06F17/50
CPC分类号： G06F17/5009 , H04L67/38
摘要： A sub-system is provided to a discrete event simulator (DES) to expedite simulation execution by first detecting a non-quiescent steady-state condition in the simulated system, and when the steady-state condition is detected, the simulator determines a state, and subsequently simulates the system at a skip-ahead time using this determined state, or a predicted state based on the determined state. Convergence analysis is used to determine whether the system is at, or approaching, a steady-state condition. This convergence skip-ahead process achieves faster analysis by avoiding the computation that would conventionally be required to simulate the system behavior during the time interval that is skipped.
摘要翻译：将子系统提供给离散事件模拟器（DES），以通过首先检测模拟系统中的非静态稳态条件来加速模拟执行，并且当检测到稳态条件时，模拟器确定状态，并且随后使用该确定的状态或基于所确定的状态的预测状态在跳过预测时间模拟系统。收敛分析用于确定系统是处于或接近稳态条件。这种汇聚跳过进程通过避免在跳过的时间间隔期间模拟系统行为通常需要的计算来实现更快的分析。

2. 发明授权

US07139692B2 Flow propagation analysis using iterative signaling 有权
标题翻译：使用迭代信令的流传播分析
公开(公告)号：US07139692B2
公开(公告)日：2006-11-21
申请号：US10325148
申请日：2002-12-20
申请人： Alain Cohen , Pradeep K. Singh , Arun Pasupathy , Stefan Znam , Marius Popa
发明人： Alain Cohen , Pradeep K. Singh , Arun Pasupathy , Stefan Znam , Marius Popa
IPC分类号： G06F9/44
CPC分类号： H04L41/145
摘要： A method and system for flow propagation analysis uses ‘tracers’ that are iteratively propagated through a simulated network between source and destination elements. These tracers are structured to contain traffic flow information from source to destination, and to reflect changes as the flow is affected by each element along the path from source to destination. The resultant flow information at the destination corresponds to the effective throughput from the source to the destination, and the flow information at the output of each intermediate element in the network corresponds to the potentially achievable throughput through that element for the given source-to-destination flow.
摘要翻译：用于流传播分析的方法和系统使用通过源和目标元素之间的模拟网络迭代地传播的“示踪物”。这些跟踪器被构造成包含从源到目的地的流量信息，并且当流被源从源到目的地的路径的每个元素影响时反映改变。目的地的结果流信息对应于从源到目的地的有效吞吐量，并且网络中的每个中间元素的输出处的流信息对应于通过该元素对于给定源到目的地的潜在可实现的吞吐量流。

3. 发明申请

US20070036088A1 Wireless MAC and link-layer simulation modeling 有权
标题翻译：无线MAC和链路层仿真建模
公开(公告)号：US20070036088A1
公开(公告)日：2007-02-15
申请号：US11501388
申请日：2006-08-09
申请人： Pradeep Singh , Alain Cohen , Alejandro Talavera-Martinez , Arun Pasupathy , Poonam Singh , Ibrahim Moral
发明人： Pradeep Singh , Alain Cohen , Alejandro Talavera-Martinez , Arun Pasupathy , Poonam Singh , Ibrahim Moral
IPC分类号： H04J1/16 , H04L12/413
CPC分类号： H04W16/225 , H04W74/00
摘要： Simulation models of media access control and physical layer characteristics facilitate the simulation/emulation of a variety of phenomena that affect transmissions via a wireless media. Such phenomena include media access contention delays, packet drops, and retransmissions that are generally dependent upon changes in transmitter/receiver locations. Each wireless environment is characterized by a model of the communication channel that characterizes transmission effects based on the number of competing transmitters in the environment, which is dynamically determined based on the location of each node in the environment. Additionally, the location of nodes is used to simulate the effects of ‘hidden nodes’, nodes that are unknown to a transmitting node but can interfere with the reception of transmissions at a receiving node. Each device/node model in the wireless environment preferably accesses the same model of the communication channel, thereby minimizing the amount of detail required at each device model.
摘要翻译：介质访问控制和物理层特性的仿真模型有助于模拟/仿真影响通过无线介质传输的各种现象。这种现象包括通常取决于发射机/接收机位置的改变的媒体接入争用延迟，分组丢弃和重传。每个无线环境的特征在于基于环境中的竞争发射机的数量来表征传输效应的通信信道的模型，其基于环境中的每个节点的位置动态地确定。另外，节点的位置用于模拟“隐藏节点”，发送节点未知的节点的影响，但可能会干扰接收节点的传输接收。无线环境中的每个设备/节点模型优选地访问通信信道的相同模型，从而最小化每个设备模型所需的细节量。

4. 发明申请

US20120207161A1 NETWORK MULTI-PATH DISCOVERY 有权
标题翻译：网路多路径发现
公开(公告)号：US20120207161A1
公开(公告)日：2012-08-16
申请号：US13210351
申请日：2011-08-15
申请人： Raghavendra Uppalli , James Mark Shaw , Pradeep Natarajan , Alain Cohen
发明人： Raghavendra Uppalli , James Mark Shaw , Pradeep Natarajan , Alain Cohen
IPC分类号： H04L12/56
CPC分类号： H04L45/26 , H04L41/0213 , H04L41/12
摘要： Potential paths between a source and destination of a network are identified based on trace-route information, then filtered to eliminate paths or links that are not supported by ancillary information associated with the network so as to identify feasible/actual paths between the source and destination. The ancillary information includes, for example, routing tables and ARP tables. If a feasible path cannot be identified based on the ancillary information, supplemental information regarding nodes further along the potential path is assessed to provide a basis for inferring the nodes that may provide a feasible path. The determined feasible paths are displayed for review, and provided to serve as filters for subsequent path-analysis tools.
摘要翻译：基于跟踪路由信息来识别网络的源和目的地之间的潜在路径，然后被过滤以消除与网络相关联的辅助信息不支持的路径或链路，以便识别源和目的地之间的可行/实际路径。辅助信息包括例如路由表和ARP表。如果不能基于辅助信息识别可行路径，则评估关于沿潜在路径进一步的节点的补充信息，以提供推断可能提供可行路径的节点的基础。确定的可行路径被显示以供审查，并提供用作后续路径分析工具的过滤器。

5. 发明申请

US20080037532A1 Managing service levels on a shared network 审中-公开
标题翻译：管理共享网络上的服务级别
公开(公告)号：US20080037532A1
公开(公告)日：2008-02-14
申请号：US11507113
申请日：2006-08-19
申请人： Edward Sykes , Shobana Narayanaswamy , Alain Cohen , Pradeep Singh , Vinod Jeyachandran , Vivek Narayanan , Yevgeny Gurevich , Michael Brauwerman
发明人： Edward Sykes , Shobana Narayanaswamy , Alain Cohen , Pradeep Singh , Vinod Jeyachandran , Vivek Narayanan , Yevgeny Gurevich , Michael Brauwerman
IPC分类号： H04L12/56
CPC分类号： H04L65/80 , H04L41/0893 , H04L41/0896 , H04L41/147 , H04L41/22 , H04L41/5003 , H04L41/5009 , H04L41/5012 , H04L41/5019 , H04L41/5025 , H04L41/5087 , H04L41/509 , H04L43/0829 , H04L43/0852
摘要： Devices and methods for modeling and analysis of services provided over a common network include a processor configured to track services connected to the common network through nodes and links; run service models associated with the services under selected conditions, the selected conditions including failure and repair of one of the nodes or links; and propose corrective action and/or change of network resources of the common network to minimize impact of the failure. The processor may also run Network model(s). The models may be executed successively or simultaneously, and outputs of one model may be used as input to other models, including any necessary conversions for compatibility.
摘要翻译：用于对通过公共网络提供的服务进行建模和分析的设备和方法包括：处理器，被配置为通过节点和链路跟踪连接到公共网络的服务; 在选定条件下运行与服务相关联的服务模型，所选条件包括其中一个节点或链接的故障和修复; 并提出纠正措施和/或改变公共网络的网络资源，以尽量减少故障的影响。处理器还可以运行网络模型。模型可以连续或同时执行，一个模型的输出可以用作其他模型的输入，包括任何必要的兼容性转换。

6. 发明申请

US20060190231A1 Tracking, analyzing, and visualizing application delay 有权
公开(公告)号：US20060190231A1
公开(公告)日：2006-08-24
申请号：US11358538
申请日：2006-02-21
申请人： Patrick Malloy , Mahesh Lavannis , Marc Schneider , John Strohm , Alain Cohen , Sukanya Sreshta , Jerome Plun , Stephen Pendleton
发明人： Patrick Malloy , Mahesh Lavannis , Marc Schneider , John Strohm , Alain Cohen , Sukanya Sreshta , Jerome Plun , Stephen Pendleton
IPC分类号： G06F17/50
CPC分类号： G06F17/5009 , G06F2217/10 , H04W16/22
摘要： Performance metrics related to the processing and propagation of messages related to select applications are collected during a simulation of a network. Each message associated with an application is tagged, and each simulated packet that contains some or all of a tagged message is correspondingly tagged to facilitate the creation of transmit records and receive records. A post processor is configured to collate transmit and receive records of each tagged message to identify delays associated with each node that processes the message, and each link that propagates the message from node to node within the network. The processed timing information is provided to the user via an interactive user interface that allows the user to view the timing information from an application layer perspective.

7. 发明授权

US09077642B2 Application level interface to network analysis tools 有权
标题翻译：应用级接口网络分析工具
公开(公告)号：US09077642B2
公开(公告)日：2015-07-07
申请号：US13487895
申请日：2012-06-04
申请人： Patrick J. Malloy , Alain Cohen , William E. Bardon, Jr. , Antoine Dunn , Ryan Gehl , Nishant Gupta , Mahesh Lavannis , John Strohm , Prasanna Sukumar
发明人： Patrick J. Malloy , Alain Cohen , William E. Bardon, Jr. , Antoine Dunn , Ryan Gehl , Nishant Gupta , Mahesh Lavannis , John Strohm , Prasanna Sukumar
IPC分类号： G06F17/50 , G06F9/44 , H04L12/24
CPC分类号： H04L41/145 , H04L41/22
摘要： A user interface to a network simulator facilitates the use of application layer parameters and application layer logic. The user interface is configured to allow the user to define the input in a graphic form, or a text/programming form, or a combination of both. The user interface provides common graphic forms for both inputting the data to the simulator as well as for displaying the resultant data from the simulator. In response, the simulator and user interface may provide updated information to reflect the impact of changes made to application layer parameters and logic.
摘要翻译：到网络仿真器的用户界面有利于应用层参数和应用层逻辑的使用。用户界面被配置为允许用户以图形形式或文本/编程形式或两者的组合来定义输入。用户界面提供用于将数据输入到模拟器以及用于显示来自模拟器的结果数据的通用图形。作为响应，模拟器和用户界面可以提供更新的信息以反映对应用层参数和逻辑的改变的影响。

8. 发明授权

US08095645B2 Traffic flow inference based on link loads and gravity measures 有权
标题翻译：基于链路负载和重力测量的交通流推理
公开(公告)号：US08095645B2
公开(公告)日：2012-01-10
申请号：US11755089
申请日：2007-05-30
申请人： Bobby Ninan , Gordon M. Bolt , Edward Sykes , Scott Glasser , Alain Cohen , Yevgeny Gurevich
发明人： Bobby Ninan , Gordon M. Bolt , Edward Sykes , Scott Glasser , Alain Cohen , Yevgeny Gurevich
IPC分类号： G06F15/173
CPC分类号： H04L41/22 , H04L43/0882
摘要： Traffic flow between each pair of nodes in a network are determined based on loads measured at each link and based on gravity measures associated with each node. The gravity measures correspond to a relative likelihood of the node being a source or a sink of traffic, and may be assigned based on ‘soft’ characteristics associated with each node, such as the demographics of the region in which the node is located, prior sinking and sourcing statistics, and so on. Because the assigned gravities are relatively subjective, the gravity measures are used to generate an objective function for solving a system of linear equations, rather than as criteria that must be satisfied in the solution. The measured link loads are allocated among the traffic flows between nodes to at least a given allocation efficiency criteria by solving a system of linear equations with an objective of minimizing a difference between the assigned gravities and the resultant gravities corresponding to the determined flows.
摘要翻译：基于在每个链路处测量的负载并且基于与每个节点相关联的重力测量来确定网络中每对节点之间的业务流。重力测量对应于节点是业务的源或信宿的相对似然性，并且可以基于与每个节点相关联的“软”特性来分配，诸如节点所在的区域的人口统计下沉和采购统计等等。由于分配的重力是相对主观的，所以使用重力测量来产生用于求解线性方程组的目标函数，而不是解决方案中必须满足的标准。测量的链路负载在节点之间的业务流中被分配到至少给定的分配效率标准，通过求解线性方程组的系统，目的是最小化与所确定的流对应的所分配的重力与所得到的重力之间的差异。

9. 发明申请

US20070047438A1 Identifying a transaction of interest within a network 审中-公开
标题翻译：识别网络中的兴趣交易
公开(公告)号：US20070047438A1
公开(公告)日：2007-03-01
申请号：US11506649
申请日：2006-08-18
申请人： Patrick Malloy , Russell Elsner , John Strohm , Alain Cohen , Steven Niemczyk , Marc Schneider
发明人： Patrick Malloy , Russell Elsner , John Strohm , Alain Cohen , Steven Niemczyk , Marc Schneider
IPC分类号： H04L12/26
CPC分类号： H04L41/5067 , H04L41/22
摘要： Transactions within a transmission stream are identified that are related to an activity. The transactions are classified utilizing characteristics that identify the activity. Packets of the transaction are extracted from the transmission stream that corresponds to the activity. The extracted packets are presented in a visualization that identifies the packets and source and sink devices of the packets. The packets may be identified from a network trace. Classifying transactions includes identifying patterns present in packets to identify related transactions and/or packets that are temporally correlated. The characteristics may include heuristics related to a communication protocol of the transactions, examining temporal relationships of the packets, and/or identifying DNS requests related to the packets. The extracted packets may be presented as a tier pair circle wherein related devices are presented around a circumference of the tier pair circle and packet traffic between devices is indicated by a joining line.
摘要翻译：识别与活动相关的传输流内的事务。交易根据识别活动的特征进行分类。从与活动相对应的传输流中提取事务的分组。提取的分组被呈现在标识分组的分组和分组的源和宿设备的可视化中。可以从网络迹线识别分组。分类事务包括识别分组中存在的模式以识别与时间上相关的相关事务和/或分组。特征可以包括与交易的通信协议相关的启发式，检查分组的时间关系和/或识别与分组相关的DNS请求。提取的分组可以呈现为层对圆，其中相关设备围绕层对圆的周围呈现，并且设备之间的分组业务由连接线指示。

10. 发明申请

US20070025328A1 Tracing routing differences 有权
标题翻译：跟踪路由差异
公开(公告)号：US20070025328A1
公开(公告)日：2007-02-01
申请号：US11494692
申请日：2006-07-27
申请人： Alain Cohen , Pradeep Singh , Vinod Jeyachandran , Nitin Gupta
发明人： Alain Cohen , Pradeep Singh , Vinod Jeyachandran , Nitin Gupta
IPC分类号： H04L12/28 , H04L12/56
CPC分类号： H04L45/28 , H04L45/02 , H04L45/54
摘要： A routing validation method and system identifies routers that are likely to be the cause of differences in forwarding tables associated with two versions of a network. Each destination sub-network prefix is processed to identify all the routers that exhibit differences in their forwarding table for this prefix. Each router exhibiting a difference is assessed to determine whether the difference may have been propagated to this router from another router. If the difference could not have been propagated from another router, this router is identified as a potential source of the observed difference. By eliminating routers that could have received the effects of the differences from another router, the task of identifying the root cause of the observed differences is substantially reduced in complexity.
摘要翻译：路由验证方法和系统识别可能是与两个网络版本相关联的转发表中的差异的原因的路由器。处理每个目标子网络前缀以标识在其前缀的转发表中表现出差异的所有路由器。评估每个出现差异的路由器，以确定差异是否可能已经从另一个路由器传播到该路由器。如果差异不能从另一个路由器传播，则该路由器被识别为观察到的差异的潜在来源。通过消除可能已经接收到来自另一个路由器的差异的影响的路由器，识别所观察到的差异的根本原因的任务在复杂性上显着降低。

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