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1. 发明授权

US08955032B2 Assessing network and device compliance with security policies 有权
标题翻译：评估网络和设备符合安全策略
公开(公告)号：US08955032B2
公开(公告)日：2015-02-10
申请号：US11776721
申请日：2007-07-12
申请人： Ankit Agarwal , Nick Bastin , Pradeep K. Singh , Seth Martin
发明人： Ankit Agarwal , Nick Bastin , Pradeep K. Singh , Seth Martin
IPC分类号： H04L29/00 , H04L29/06
CPC分类号： H04L63/20
摘要： All of the transit services that each device is expected to provide are determined and contrasted with the transit configuration of each device. Because the transit configuration of each device may be state-dependent, the service items within each application service are processed in sequential order. Sequences of service items are associated with connection groups, and each of the routes associated with each connection group is determined based on the sequential order of the service items. The configuration of each device along each route is processed to determine the services that will be permitted or denied, based on its current configuration. Each desired transit service item is compared to the transit configuration provided by each device to identify any inconsistencies and/or violations.
摘要翻译：每个设备预期提供的所有过境服务都被确定，并与每个设备的传输配置进行对比。由于每个设备的传输配置可能与状态有关，因此每个应用服务中的服务项目按顺序进行处理。服务项目的顺序与连接组相关联，并且基于服务项目的顺序来确定与每个连接组相关联的每个路线。根据其当前配置，处理每个路由上每个设备的配置，以确定将被允许或拒绝的服务。将每个期望的中转服务项目与由每个设备提供的传输配置进行比较，以识别任何不一致和/或违规。

2. 发明申请

US20120316856A1 METHODS AND SYSTEM FOR MODELING WIRELESS COMMUNICATIONS IN A NETWORK 有权
标题翻译：网络无线通信建模方法与系统
公开(公告)号：US20120316856A1
公开(公告)日：2012-12-13
申请号：US13590088
申请日：2012-08-20
申请人： PRADEEP K. SINGH , ALAIN J. COHEN , ALEJANDRO TALAVERA-MARTINEZ , ARUN PASUPATHY , POONAM SINGH , IBRAHIM UTKU MORAL
发明人： PRADEEP K. SINGH , ALAIN J. COHEN , ALEJANDRO TALAVERA-MARTINEZ , ARUN PASUPATHY , POONAM SINGH , IBRAHIM UTKU MORAL
IPC分类号： G06F17/50
CPC分类号： H04W16/225 , H04W74/00
摘要： The embodiments relate to modeling wireless communications in a network. In wireless communications, the nodes share one or more wireless communication channels. When a node has data to transmit, it must contend with the other nodes for access to the wireless communication channel. In the embodiments, the model is configured to simulate the throughput effects of contention including delays caused by retransmissions due to interference and collisions, listen-and-backoff, unavailability of time slots, etc. The occurrence of failed/dropped transmissions due to buffer overflows, excessive retransmission attempts, and unintended collisions are modeled as well. In addition, the embodiments may simulate the effect of mobility by the nodes and the effect of the location of the nodes relative to each other.
摘要翻译：实施例涉及对网络中的无线通信进行建模。在无线通信中，节点共享一个或多个无线通信信道。当节点具有要发送的数据时，它必须与其他节点进行竞争以访问无线通信信道。在实施例中，该模型被配置为模拟由于干扰和冲突，收听和回退，时隙不可用等引起的重传引起的争用的吞吐量效应。由于缓冲区溢出而发生故障/丢弃的传输，过多的重传尝试和意外的冲突也被建模。此外，实施例可以模拟节点的移动性的影响以及节点相对于彼此的位置的影响。

3. 发明授权

US08135990B2 Multi-variate network survivability analysis 有权
标题翻译：多变量网络生存性分析
公开(公告)号：US08135990B2
公开(公告)日：2012-03-13
申请号：US11834058
申请日：2007-08-06
申请人： Vanko Vankov , Vinod Jeyachandran , Pradeep K. Singh , Alain J. Cohen , Shobana Narayanaswamy
发明人： Vanko Vankov , Vinod Jeyachandran , Pradeep K. Singh , Alain J. Cohen , Shobana Narayanaswamy
IPC分类号： G06F11/00
CPC分类号： H04L41/0681 , H04L41/5009 , H04L43/0876 , H04L43/16
摘要： Network survivability is quantified in such a way that failure cases can be compared and ranked against each other in terms of the severity of their impact on the various performance measures associated with the network. The degradation in network performance caused by each failure is quantified based on user-defined sets of thresholds of degradation severity for each performance measure. Each failure is simulated using a model of the network, and a degradation vector is determined for each simulated failure. A comparison function is defined to map the degradation vectors into an ordered set, and this ordered set is used to create an ordered list of network failures, in order of the network degradation caused by each failure.
摘要翻译：网络生存能力被量化，使得故障案例可以根据其对与网络相关联的各种性能测量的影响的严重性彼此进行比较和排名。基于用户定义的每个性能测量的劣化严重性阈值集，量化每个故障导致的网络性能的下降。使用网络模型模拟每个故障，并为每个模拟故障确定劣化矢量。定义比较函数将劣化向量映射到有序集合中，并且该有序集合用于按照由每个故障引起的网络劣化的顺序来创建网络故障的有序列表。

4. 发明授权

US07688743B2 Tracing routing differences 有权
标题翻译：跟踪路由差异
公开(公告)号：US07688743B2
公开(公告)日：2010-03-30
申请号：US11494692
申请日：2006-07-27
申请人： Alain J. Cohen , Pradeep K. Singh , Vinod Jeyachandran , Nitin Gupta
发明人： Alain J. Cohen , Pradeep K. Singh , Vinod Jeyachandran , Nitin Gupta
IPC分类号： H04L12/26 , H04L12/28
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。

5. 发明申请

US20080040088A1 MULTI-VARIATE NETWORK SURVIVABILITY ANALYSIS 有权
标题翻译：多变网络可行性分析
公开(公告)号：US20080040088A1
公开(公告)日：2008-02-14
申请号：US11834058
申请日：2007-08-06
申请人： Vanko VANKOV , Vinod Jeyachandran , Pradeep K. Singh , Alain J. Cohen , Shobana Narayanaswamy
发明人： Vanko VANKOV , Vinod Jeyachandran , Pradeep K. Singh , Alain J. Cohen , Shobana Narayanaswamy
IPC分类号： G06G7/62 , G06F11/30 , G06F11/34
CPC分类号： H04L41/0681 , H04L41/5009 , H04L43/0876 , H04L43/16
摘要： Network survivability is quantified in such a way that failure cases can be compared and ranked against each other in terms of the severity of their impact on the various performance measures associated with the network. The degradation in network performance caused by each failure is quantified based on user-defined sets of thresholds of degradation severity for each performance measure. Each failure is simulated using a model of the network, and a degradation vector is determined for each simulated failure. A comparison function is defined to map the degradation vectors into an ordered set, and this ordered set is used to create an ordered list of network failures, in order of the network degradation caused by each failure.
摘要翻译：网络生存能力被量化，使得故障案例可以根据其对与网络相关联的各种性能测量的影响的严重性彼此进行比较和排名。基于用户定义的每个性能测量的劣化严重性阈值集，量化每个故障导致的网络性能的下降。使用网络模型模拟每个故障，并为每个模拟故障确定劣化矢量。定义比较函数将劣化向量映射到有序集合中，并且该有序集合用于按照由每个故障引起的网络劣化的顺序来创建网络故障的有序列表。

6. 发明授权

US08743742B2 System and method for modeling a system that comprises networks connected across a third party external network based on incomplete configuration data 有权
标题翻译：用于对包括基于不完整配置数据跨第三方外部网络连接的网络的系统进行建模的系统和方法
公开(公告)号：US08743742B2
公开(公告)日：2014-06-03
申请号：US13448389
申请日：2012-04-16
申请人： Pradeep K. Singh , Venuprakash Barathan
发明人： Pradeep K. Singh , Venuprakash Barathan
IPC分类号： H04L12/28 , G06F15/177
CPC分类号： H04L41/12 , H04L41/0853 , H04L41/145 , H04L41/22
摘要： The present system includes a system, method and device for inferring connectivity between network devices across a third party network. Configuration data related to the network devices is examined and configuration data about the network is inferred. The inferred configuration data may be related to a communication protocol, network bandwidth, and the like. A model representing the network is then created to indicate inferred interfaces and connections through the external network between network devices. The representation may be rendered in various forms, such as a display or data exported to another system. Various studies may also be performed using the model, such as traffic, routing, or planning studies.
摘要翻译：本系统包括用于推断跨第三方网络的网络设备之间的连接性的系统，方法和设备。检查与网络设备相关的配置数据，并推断有关网络的配置数据。所推断的配置数据可以与通信协议，网络带宽等相关。然后创建表示网络的模型，以指示通过网络设备之间的外部网络的推断的接口和连接。该表示可以以各种形式呈现，例如显示或导出到另一系统的数据。还可以使用模型进行各种研究，例如交通，路线或规划研究。

7. 发明授权

US08693493B2 Methods and system for modeling wireless communications in a network 有权
标题翻译：网络无线通信建模方法及系统
公开(公告)号：US08693493B2
公开(公告)日：2014-04-08
申请号：US13590088
申请日：2012-08-20
申请人： Pradeep K. Singh , Alain J. Cohen , Alejandro Talavera-Martinez , Arun Pasupathy , Vinod Jeyachandran , Ibrahim Utku Moral
发明人： Pradeep K. Singh , Alain J. Cohen , Alejandro Talavera-Martinez , Arun Pasupathy , Vinod Jeyachandran , Ibrahim Utku Moral
IPC分类号： H04L12/413
CPC分类号： H04W16/225 , H04W74/00
摘要： The embodiments relate to modeling wireless communications in a network. In wireless communications, the nodes share one or more wireless communication channels. When a node has data to transmit, it must contend with the other nodes for access to the wireless communication channel. In the embodiments, the model is configured to simulate the throughput effects of contention including delays caused by retransmissions due to interference and collisions, listen-and-backoff, unavailability of time slots, etc. The occurrence of failed/dropped transmissions due to buffer overflows, excessive retransmission attempts, and unintended collisions are modeled as well. In addition, the embodiments may simulate the effect of mobility by the nodes and the effect of the location of the nodes relative to each other.
摘要翻译：实施例涉及对网络中的无线通信进行建模。在无线通信中，节点共享一个或多个无线通信信道。当节点具有要发送的数据时，它必须与其他节点进行竞争以访问无线通信信道。在实施例中，该模型被配置为模拟由于干扰和冲突，收听和回退，时隙不可用等引起的重传引起的争用的吞吐量效应。由于缓冲区溢出而发生故障/丢弃的传输，过多的重传尝试和意外的冲突也被建模。此外，实施例可以模拟节点的移动性的影响以及节点相对于彼此的位置的影响。

8. 发明授权

US08493883B2 Identifying and analyzing network configuration differences 有权
标题翻译：识别和分析网络配置差异
公开(公告)号：US08493883B2
公开(公告)日：2013-07-23
申请号：US11505228
申请日：2006-08-16
申请人： Pradeep K. Singh , Alain J. Cohen , Ankit Agarwal
发明人： Pradeep K. Singh , Alain J. Cohen , Ankit Agarwal
IPC分类号： H04L12/28
CPC分类号： H04L41/0866 , H04L41/0859
摘要： A contextual and semantic analysis of network entities facilitates a mapping and comparison of the entities between network models. The system includes a plurality of refine handler and match handler pairs that use rules that are specific to the type of network entities being analyzed. The refine handler analyzes the network model to identify the entities for which its rules apply, and the match handler processes these identified entities to establish a pairing between corresponding entities in each model. A sequence of refine-match processes are applied to the network models, typically in accordance with a hierarchy of rules until each entity is identified as a matched, added, or removed entity. A difference handler processes the identified pairings to provide a difference analysis that facilitates a meaningful interpretation of the configuration changes, and a user interface provides an interactive environment to view the differences from different perspectives.
摘要翻译：网络实体的上下文和语义分析有助于网络模型之间的实体的映射和比较。该系统包括使用特定于正在分析的网络实体的类型的规则的多个精简处理程序和匹配处理程序对。精简处理程序分析网络模型以识别其规则适用的实体，匹配处理程序处理这些标识的实体以在每个模型中的对应实体之间建立配对。精细匹配过程的序列通常根据规则的层次结构应用于网络模型，直到每个实体被识别为匹配的，添加的或移除的实体。差异处理程序处理识别的配对以提供有助于对配置更改进行有意义的解释的差异分析，并且用户界面提供交互式环境以从不同的角度来查看差异。

9. 发明授权

US08249094B2 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：US08249094B2
公开(公告)日：2012-08-21
申请号：US11501388
申请日：2006-08-09
申请人： Pradeep K. Singh , Alain J. Cohen , Alejandro Talavera-Martinez , Arun Pasupathy , Poonam Singh , Ibrahim Utku Moral
发明人： Pradeep K. Singh , Alain J. Cohen , Alejandro Talavera-Martinez , Arun Pasupathy , Poonam Singh , Ibrahim Utku Moral
IPC分类号： 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。

10. 发明申请

US20120163197A1 ROUTING VALIDATION 有权
标题翻译：路由验证
公开(公告)号：US20120163197A1
公开(公告)日：2012-06-28
申请号：US13412604
申请日：2012-03-05
申请人： Alain J. COHEN , Pradeep K. SINGH , Vinod JEYACHANDRAN , Nitin GUPTA
发明人： Alain J. COHEN , Pradeep K. SINGH , Vinod JEYACHANDRAN , Nitin GUPTA
IPC分类号： H04L12/26
CPC分类号： H04L45/28 , H04L41/0631 , H04L41/08 , H04L41/0866 , H04L41/14 , H04L41/145 , H04L45/02 , H04L45/124
摘要： A simulator simulates routing system protocols to build routing tables corresponding to a modeled network, and a comparator compares the routing tables in the actual network to these simulator-created routing tables. Because the modeled system represents a fault-free version of the actual system, and assuming that the modeled routing system protocols are representative of the algorithms used in the actual routers, these simulator-produced routing tables can represent steady-state routing tables that should be present in the routers of the actual network at steady state. By querying each router in the actual network for its routing table and comparing each routing table to the corresponding simulator-produced routing table, any differences from the steady state can be identified.
摘要翻译：模拟器模拟路由系统协议以构建与建模网络相对应的路由表，并且比较器将实际网络中的路由表与这些模拟器创建的路由表进行比较。因为建模的系统代表了实际系统的无故障版本，并且假设建模的路由系统协议代表了实际路由器中使用的算法，这些模拟器生成的路由表可以表示应该是稳态路由表存在于稳定状态下实际网络的路由器。通过查询实际网络中的每个路由器的路由表，并将每个路由表与相应的模拟器生成的路由表进行比较，可以识别与稳态的任何差异。

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