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1. 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。

2. 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。

3. 发明授权

US07843840B2 Traffic independent survivability analysis 有权
标题翻译：交通独立生存能力分析
公开(公告)号：US07843840B2
公开(公告)日：2010-11-30
申请号：US12195393
申请日：2008-08-20
申请人： Vanko Vankov , Arun Pasupathy , Vinod Jeyachandran , Pradeep K. Singh , Alain J. Cohen , Yonghuan Cao
发明人： Vanko Vankov , Arun Pasupathy , Vinod Jeyachandran , Pradeep K. Singh , Alain J. Cohen , Yonghuan Cao
IPC分类号： G06F11/30
CPC分类号： H04L43/50
摘要： First-order effects of hypothesized fault conditions are determined by propagating discrete test packets between select nodes and noting the change of path, if any, taken by the test packet under each condition relative to the fault-free path. Tools are provided to create classes of node pairs of interest, and test packets are created only for select classes. The network is analyzed to identify fault conditions that are likely to impact system performance, and only these fault conditions are simulated. By providing a methodology for selecting classes of node pairs to test, and prioritizing the faults to simulate, a first-order survivability analysis of large networks can be performed efficiently and effectively. The efficiency of this technique is also enhanced by providing test packets that are representative of a wide range of possible source-destination combinations, and by evaluating only the source-destination combinations that may be directly affected by each fault condition.
摘要翻译：通过在选择节点之间传播离散的测试包，并注意到每个条件下相对于无故障路径，由测试包采取的路径（如果有的话）的变化来确定假设故障条件的一阶影响。提供工具来创建感兴趣的节点对类，并且只为选择类创建测试包。分析网络以识别可能影响系统性能的故障状况，并且仅模拟这些故障条件。通过提供一种选择要测试的节点对的类别并对故障进行优先级模拟的方法，可以有效和高效地执行大型网络的一阶生存性分析。通过提供表示广泛范围的可能的源 - 目的地组合的测试分组以及通过仅评估可能由每个故障状况直接影响的源 - 目的地组合来增强该技术的效率。

4. 发明申请

US20090052333A1 TRAFFIC INDEPENDENT SURVIVABILITY ANALYSIS 有权
标题翻译：交通费独立生存率分析
公开(公告)号：US20090052333A1
公开(公告)日：2009-02-26
申请号：US12195393
申请日：2008-08-20
申请人： Vanko Vankov , Arun Pasupathy , Vinod Jeyachandran , Pradeep K. Singh , Alain J. Cohen , Yonghuan Cao
发明人： Vanko Vankov , Arun Pasupathy , Vinod Jeyachandran , Pradeep K. Singh , Alain J. Cohen , Yonghuan Cao
IPC分类号： G06F11/30
CPC分类号： H04L43/50
摘要： First-order effects of hypothesized fault conditions are determined by propagating discrete test packets between select nodes and noting the change of path, if any, taken by the test packet under each condition relative to the fault-free path. Tools are provided to create classes of node pairs of interest, and test packets are created only for select classes. The network is analyzed to identify fault conditions that are likely to impact system performance, and only these fault conditions are simulated. By providing a methodology for selecting classes of node pairs to test, and prioritizing the faults to simulate, a first-order survivability analysis of large networks can be performed efficiently and effectively. The efficiency of this technique is also enhanced by providing test packets that are representative of a wide range of possible source-destination combinations, and by evaluating only the source-destination combinations that may be directly affected by each fault condition.
摘要翻译：通过在选择节点之间传播离散的测试包，并注意到每个条件下相对于无故障路径，由测试包采取的路径（如果有的话）的变化来确定假设故障条件的一阶影响。提供工具来创建感兴趣的节点对类，并且只为选择类创建测试包。分析网络以识别可能影响系统性能的故障状况，并且仅模拟这些故障条件。通过提供一种选择要测试的节点对的类别并对故障进行优先级模拟的方法，可以有效和高效地执行大型网络的一阶生存性分析。通过提供表示广泛范围的可能的源 - 目的地组合的测试分组以及通过仅评估可能由每个故障状况直接影响的源 - 目的地组合来增强该技术的效率。

5. 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。

6. 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。

7. 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。

8. 发明授权

US08898734B2 Analyzing security compliance within a network 有权
标题翻译：分析网络中的安全合规性
公开(公告)号：US08898734B2
公开(公告)日：2014-11-25
申请号：US11505171
申请日：2006-08-16
申请人： Pradeep K. Singh , Ankit Agarwal , Alain J. Cohen , Venuprakash Barathan , Vinod Jeyachandran
发明人： Pradeep K. Singh , Ankit Agarwal , Alain J. Cohen , Venuprakash Barathan , Vinod Jeyachandran
IPC分类号： H04L29/06 , H04L12/26 , H04L12/24
CPC分类号： H04L41/28 , H04L12/2697 , H04L41/0866 , H04L41/0893 , H04L41/145 , H04L41/22 , H04L43/50 , H04L63/1433 , H04L63/20
摘要： A security policy database identifies the intended security policies within a network, a traffic generator provides test traffic that is configured to test each defined security policy, and a simulator simulates the propagation of this traffic on a model of the network. The model of the network includes the configuration data associated with each device, and thus, if devices are properly configured to enforce the intended security policies, the success/failure of the simulated test traffic will conform to the intended permit/deny policy of each connection. Differences between the simulated message propagation and the intended security policies are reported to the user, and diagnostic tools are provided to facilitate identification of the device configuration data that accounts for the observed difference. Additionally, if a network's current security policy is unknown, test traffic is generated to reveal the actual policy in effect, to construct a baseline intended security policy.
摘要翻译：安全策略数据库标识网络中的预期安全策略，流量生成器提供被配置为测试每个定义的安全策略的测试流量，并且模拟器模拟该流量在网络模型上的传播。网络模型包括与每个设备相关联的配置数据，因此，如果设备被正确配置以实施预期的安全策略，则模拟测试流量的成功/失败将符合每个连接的预期允许/拒绝策略。向用户报告模拟消息传播与预期安全策略之间的差异，并提供诊断工具以便于识别出所观察到的差异的设备配置数据。此外，如果网络当前的安全策略未知，则生成测试流量以显示实际的实际策略，以构建基准预期的安全策略。

9. 发明授权

US08130759B2 Routing validation 有权
标题翻译：路由验证
公开(公告)号：US08130759B2
公开(公告)日：2012-03-06
申请号：US11494441
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： H04L12/28
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 will represent the ‘ideal’ routing tables that should be present in the routers of the actual network. 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 ‘ideal’ 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实际路由器中使用的算法，则这些模拟器生成的路由表将表示应该应用的“理想”路由表存在于实际网络的路由器中。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“ideal”的任何差异。

10. 发明授权

US08700958B2 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：US08700958B2
公开(公告)日：2014-04-15
申请号：US13412623
申请日：2012-03-06
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。

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