公开(公告)号：US06563517B1

公开(公告)日：2003-05-13

申请号：US09236622

申请日：1999-01-29

申请人： Pravin Bhagwat ,  Richard Yeh-whein Han ,  Richard Orville LaMaire ,  Todd William Mummert ,  James Rubas

发明人： Pravin Bhagwat ,  Richard Yeh-whein Han ,  Richard Orville LaMaire ,  Todd William Mummert ,  James Rubas

IPC分类号： G06F1500

CPC分类号： H04N21/658 ,  G06F17/30905 ,  H04L67/28 ,  H04L67/2823 ,  H04L67/306 ,  H04L67/32 ,  H04L69/24 ,  H04N19/40 ,  H04N21/6377

摘要： The present invention provides methods, devices and systems for dynamically adjusting transcoding parameters so as to increase the benefits of transcoding. Methods of adaptation are designed to cope with the variability of network characteristics and of the size of transcoded images. The invention also provides a method and apparatus to enable the transcoding proxy to adjust a quality-size tradeoff on a per-image and/or a per-client basis. The adaptive transcoder chooses different parameters for each object, and provides performance improvements. The invention further provides a general framework for making policy decisions taking into account available bandwidth, content and type of image, and user preferences. The invention also includes methods for generating feedback about the choice of optimal transcoding parameters to the user.

摘要翻译： 本发明提供了用于动态调整代码转换参数的方法，装置和系统，以便增加转码的益处。 适应方法旨在应对网络特性和代码转换图像大小的变化。 本发明还提供一种使代码转换代理能够在每个图像和/或每个客户端基础上调整质量尺寸权衡的方法和装置。 自适应代码转换器为每个对象选择不同的参数，并提供性能改进。 本发明进一步提供了考虑可用带宽，图像的内容和类型以及用户偏好来制定策略决策的一般框架。 本发明还包括用于产生关于对用户的最佳代码转换参数的选择的反馈的方法。

公开(公告)号：US07764648B2

公开(公告)日：2010-07-27

申请号：US12329644

申请日：2008-12-08

申请人： Krishnamurthy N Gopinath ,  Pravin Bhagwat

发明人： Krishnamurthy N Gopinath ,  Pravin Bhagwat

IPC分类号： H04W4/02

CPC分类号： H04W48/04 ,  H04W8/26 ,  H04W12/12

摘要： A method for arbitrating use of wireless medium for transmission of wireless signals within a selected local geographic region. The selected local geographic region comprises a first set of a plurality of devices to be allowed to transmit wireless signals and a second set of one or more devices to be substantially restricted from transmitting wireless signals. The method includes providing identity information associated with the first set of wireless devices. The method includes transmitting over a wireless medium at least one packet for each of the wireless devices in the first set. The at least one packet for each of the wireless devices includes an identity information, including an address, associated with that wireless device. That wireless device is a recipient of the one packet on the wireless medium. The at least one packet also has a selected value in a duration field of at least the one packet. The selected value is associated with a portion of time for which that wireless device is to be allowed to transmit wireless signals within the selected local geographic region while restricting at least the wireless devices in the second set.

摘要翻译： 一种用于在选定的本地地理区域内仲裁使用无线介质传输无线信号的方法。 所选择的本地地理区域包括要允许发送无线信号的多个设备的第一组，以及基本上限制发射无线信号的一个或多个设备的第二组。 该方法包括提供与第一组无线设备相关联的身份信息。 该方法包括通过无线介质发送用于第一组中的每个无线设备的至少一个分组。 用于每个无线设备的至少一个分组包括与该无线设备相关联的身份信息，包括地址。 该无线设备是无线介质上的一个分组的接收者。 至少一个分组在至少一个分组的持续时间字段中也具有选择的值。 所选择的值与所述无线设备将被允许在所选择的本地地理区域内发送无线信号的时间的一部分相关联，同时至少限制第二组中的无线设备。

公开(公告)号：US07496094B2

公开(公告)日：2009-02-24

申请号：US11230436

申请日：2005-09-19

申请人： Krishnamurthy N. Gopinath ,  Pravin Bhagwat

发明人： Krishnamurthy N. Gopinath ,  Pravin Bhagwat

IPC分类号： H04L12/56

CPC分类号： H04W48/04 ,  H04W8/26 ,  H04W12/12

摘要： A method for arbitrating use of wireless medium for transmission of wireless signals within a selected local geographic region. The selected local geographic region comprises a first set of a plurality of devices to be allowed to transmit wireless signals and a second set of one or more devices to be substantially restricted from transmitting wireless signals. The method includes providing identity information associated with the first set of wireless devices. The method includes transmitting over a wireless medium at least one packet for each of the wireless devices in the first set. The at least one packet for each of the wireless devices includes an identity information, including an address, associated with that wireless device. That wireless device is a recipient of the one packet on the wireless medium. The at least one packet also has a selected value in a duration field of at least the one packet. The selected value is associated with a portion of time for which that wireless device is to be allowed to transmit wireless signals within the selected local geographic region while restricting at least the wireless devices in the second set.

摘要翻译： 一种用于在选定的本地地理区域内仲裁使用无线介质传输无线信号的方法。 所选择的本地地理区域包括要允许发送无线信号的多个设备的第一组，以及基本上限制发射无线信号的一个或多个设备的第二组。 该方法包括提供与第一组无线设备相关联的身份信息。 该方法包括通过无线介质发送用于第一组中的每个无线设备的至少一个分组。 用于每个无线设备的至少一个分组包括与该无线设备相关联的身份信息，包括地址。 该无线设备是无线介质上的一个分组的接收者。 至少一个分组在至少一个分组的持续时间字段中也具有选择的值。 所选择的值与所述无线设备将被允许在所选择的本地地理区域内发送无线信号的时间的一部分相关联，同时至少限制第二组中的无线设备。

公开(公告)号：US20090013073A1

公开(公告)日：2009-01-08

申请号：US12207502

申请日：2008-09-10

申请人： Hemant Chaskar ,  Murthy Jonnalagadda ,  Sharad Mittal ,  Pravin Bhagwat

发明人： Hemant Chaskar ,  Murthy Jonnalagadda ,  Sharad Mittal ,  Pravin Bhagwat

IPC分类号： G06F15/173 ,  H04Q7/24

CPC分类号： H04W8/005

摘要： A system and method is provided for detecting wireless access devices coupled to local area network of computers. The method includes coupling a sniffer device to a local area network. The method includes transferring one or more packets to be directed to a selected device over the local area network. The selected device is preferably coupled to the local area network. The method includes intercepting the one or more packets to be directed to the selected device at the sniffer device. Moreover, the method includes deriving information from the intercepted one or more packets using the sniffer device. The method can generate one or more marker packets in a selected format using the sniffer device. The marker packets are provided based upon at least a portion of the information derived from the intercepted packets. The method includes transferring the one or more marker packets from the sniffer device over the local area network to the selected device and monitoring an airspace within a vicinity of the selected device using one or more sniffer devices

摘要翻译： 提供了一种用于检测耦合到计算机的局域网的无线接入设备的系统和方法。 该方法包括将嗅探器设备耦合到局域网。 该方法包括通过局域网传送要被定向到所选择的设备的一个或多个分组。 所选择的设备优选地耦合到局域网。 该方法包括在嗅探器设备处拦截要被引导到所选择的设备的一个或多个分组。 此外，该方法包括使用嗅探装置从拦截的一个或多个分组中导出信息。 该方法可以使用嗅探器设备生成所选格式的一个或多个标记分组。 基于从截获的分组导出的信息的至少一部分来提供标记分组。 该方法包括将来自嗅探装置的一个或多个标记分组经由局域网转移到所选择的装置，并使用一个或多个嗅探装置监视所选装置附近的空域

公开(公告)号：US08789191B2

公开(公告)日：2014-07-22

申请号：US13399626

申请日：2012-02-17

申请人： Pravin Bhagwat ,  Shantanu Gogate ,  David C. King

发明人： Pravin Bhagwat ,  Shantanu Gogate ,  David C. King

IPC分类号： H04L29/06

CPC分类号： G06F21/55 ,  H04L43/00 ,  H04L63/1416 ,  H04L69/16 ,  H04L69/161 ,  H04L69/163 ,  H04W12/00 ,  H04W12/08 ,  H04W12/12

摘要： An apparatus for wireless communication including an automated intrusion detection process is provided. The apparatus includes a processing unit. It includes a wireless network interface device and an Ethernet (or like) wired network interface device that are coupled to the processing unit. One or more memories are coupled to the processing unit. A code is directed to perform a process for detection of wireless activity within a selected local geographic region. According to a specific embodiment, the wireless activity is derived from a wireless access point device that is operational about the selected local geographic region. A code is directed to performing connectivity test using one or more marker packets to determine connectivity status of the wireless access point device to network to be protected from intrusion. Depending upon the embodiment, other codes may exist to carry out the functionality described herein.

摘要翻译： 提供了一种包括自动入侵检测过程的无线通信装置。 该装置包括处理单元。 它包括耦合到处理单元的无线网络接口设备和以太网（或类似的）有线网络接口设备。 一个或多个存储器耦合到处理单元。 代码被指示执行用于检测所选局部地理区域内的无线活动的过程。 根据具体实施例，无线活动是从关于所选择的本地地理区域可操作的无线接入点设备导出的。 代码旨在使用一个或多个标记分组来执行连接测试，以确定无线接入点设备到网络的连接状态以防止入侵。 根据实施例，存在其他代码以执行本文所描述的功能。

公开(公告)号：US07856656B1

公开(公告)日：2010-12-21

申请号：US12210184

申请日：2008-09-13

申请人： Shrinivas Kharvandikar ,  Pravin Bhagwat

发明人： Shrinivas Kharvandikar ,  Pravin Bhagwat

IPC分类号： H04L29/12

CPC分类号： H04W12/12 ,  H04L63/126 ,  H04L63/1408

摘要： Methods and systems for detecting a masquerading wireless device in a local area network are provided. The method includes receiving a first packet and a second packet. Preferably, the first packet includes a first identity information and a first time information, and the second packet includes a second identity information and a second time information. The method can compute, using the first time information, a first approximation to a starting time of a wireless device associated with the first identity information. The method can also compute, using the second time information, a second approximation to a starting time of a wireless device associated with the second identity information. The method further includes determining whether a masquerading wireless device is present in the local area network based on at least the first and second approximations.

摘要翻译： 提供了用于检测局域网中伪装无线设备的方法和系统。 该方法包括接收第一分组和第二分组。 优选地，第一分组包括第一身份信息和第一时间信息，并且第二分组包括第二身份信息和第二时间信息。 该方法可以使用第一时间信息来计算与第一身份信息相关联的无线设备的开始时间的第一近似。 该方法还可以使用第二时间信息来计算与第二身份信息相关联的无线设备的开始时间的第二近似。 该方法还包括基于至少第一和第二近似来确定伪装无线设备是否存在于局域网中。

公开(公告)号：US07804808B2

公开(公告)日：2010-09-28

申请号：US11532811

申请日：2006-09-18

申请人： Pravin Bhagwat ,  Hemant Chaskar ,  David C. King ,  Jai Rawat

发明人： Pravin Bhagwat ,  Hemant Chaskar ,  David C. King ,  Jai Rawat

IPC分类号： H04W4/00

CPC分类号： H04W12/12 ,  H04K3/65 ,  H04K3/86 ,  H04K3/94 ,  H04K2203/18 ,  H04L29/12028 ,  H04L29/12367 ,  H04L41/28 ,  H04L61/103 ,  H04L61/2514 ,  H04L63/102 ,  H04L63/1408 ,  H04L63/1416 ,  H04L63/1466 ,  H04W12/06 ,  H04W12/08

摘要： A method for monitoring a selected region of an airspace associated with local area networks of computing devices is provided. The method includes providing one or more segments of a legacy local area network to be protected in a selected geographic region. The legacy local area network is characterized by an unsecured airspace within the selected geographic region. The method includes determining a security policy associated with the one or more segments of the legacy local area network. The security policy at least characterizes a type of wireless activity in the unsecured airspace to be permitted, denied, or ignored. Additionally, the method includes connecting one or more sniffer devices into the legacy local area network. The one or more sniffer devices are spatially disposed within the selected geographic region to cause at least a portion of the unsecured airspace to be secured according to the security policy.

摘要翻译： 提供了一种用于监视与计算设备的局域网相关联的空域的选定区域的方法。 该方法包括提供要在所选择的地理区域中保护的传统局域网的一个或多个段。 遗留的局域网的特征在于所选地理区域内的无安全空域。 该方法包括确定与传统局域网的一个或多个段相关联的安全策略。 安全策略至少表征了无担保空域中允许，拒绝或忽略的一种无线活动。 此外，该方法包括将一个或多个嗅探器设备连接到传统局域网中。 一个或多个嗅探装置被空间地布置在所选择的地理区域内，以使至少一部分无担保空域根据安全策略得到固定。

公开(公告)号：US20070171885A1

公开(公告)日：2007-07-26

申请号：US11695569

申请日：2007-04-02

申请人： Pravin Bhagwat ,  Shantanu Gogate ,  David King

发明人： Pravin Bhagwat ,  Shantanu Gogate ,  David King

IPC分类号： H04Q7/24

CPC分类号： H04W12/12 ,  H04L43/00 ,  H04L63/1408 ,  H04L63/1416 ,  H04L63/1466 ,  H04L63/1475 ,  H04L69/16 ,  H04L69/161 ,  H04L69/163 ,  H04W8/26 ,  H04W12/06 ,  H04W84/04 ,  H04W84/12

摘要： A method for protecting local area networks within a selected local geographic region (e.g. office, apartment, building, coffee shop, hot-spot etc.) from wireless attacks, using a wireless sniffer apparatus. The method includes placing one or more wireless sniffer apparatus spatially to provide substantial radio coverage over at least a portion of the selected local geographic region comprising one or more local area networks. Moreover the method includes coupling one or more of the wireless sniffer apparatus to one or more of the local area networks.

摘要翻译： 使用无线嗅探装置从无线攻击中保护选定的本地地理区域（例如办公室，公寓，建筑物，咖啡店，热点等）内的局域网的方法。 该方法包括在空间上放置一个或多个无线嗅探装置，以在包括一个或多个局域网的所选择的局部地理区域的至少一部分上提供实质的无线电覆盖。 此外，该方法包括将无线嗅探装置中的一个或多个耦合到一个或多个局域网。

公开(公告)号：US20070025313A1

公开(公告)日：2007-02-01

申请号：US11532811

申请日：2006-09-18

申请人： Pravin Bhagwat ,  Hemant Chaskar ,  David King ,  Jai Rawat

发明人： Pravin Bhagwat ,  Hemant Chaskar ,  David King ,  Jai Rawat

IPC分类号： H04Q7/24

CPC分类号： H04W12/12 ,  H04K3/65 ,  H04K3/86 ,  H04K3/94 ,  H04K2203/18 ,  H04L29/12028 ,  H04L29/12367 ,  H04L41/28 ,  H04L61/103 ,  H04L61/2514 ,  H04L63/102 ,  H04L63/1408 ,  H04L63/1416 ,  H04L63/1466 ,  H04W12/06 ,  H04W12/08

摘要： A method for monitoring a selected region of an airspace associated with local area networks of computing devices is provided. The method includes providing one or more segments of a legacy local area network to be protected in a selected geographic region. The legacy local area network is characterized by an unsecured airspace within the selected geographic region. The method includes determining a security policy associated with the one or more segments of the legacy local area network. The security policy at least characterizes a type of wireless activity in the unsecured airspace to be permitted, denied, or ignored. Additionally, the method includes connecting one or more sniffer devices into the legacy local area network. The one or more sniffer devices are spatially disposed within the selected geographic region to cause at least a portion of the unsecured airspace to be secured according to the security policy. Moreover, the method includes coupling a security appliance to the legacy local area network. The method also includes determining if at least one of the sniffer devices is coupled to each of the one or more segments of the legacy local area network to be protected and determining if the one or more sniffer devices substantially covers the portion of the unsecured airspace to be secured The method additionally includes monitoring wireless activity in the airspace using the one or more sniffer devices, and automatically classifying, using a classification process, a portion of information associated with the monitoring of the wireless activity to at least determine if the wireless activity communicates to at least one of the one or more segments to be protected. Further, the method includes detecting a violation of the security policy based upon at least the classifying of the portion of the information from the monitoring of the wireless activity, and automatically processing an action associated with the violation in accordance to the security policy for the one or more segments in the legacy local area network to be protected

公开(公告)号：US07139268B1

公开(公告)日：2006-11-21

申请号：US09240374

申请日：1999-01-29

申请人： Pravin Bhagwat ,  John Michael Tracey

发明人： Pravin Bhagwat ,  John Michael Tracey

IPC分类号： H04L12/28

CPC分类号： H04L47/40 ,  H04L47/10 ,  H04L47/127 ,  H04L47/2416 ,  H04L47/2441 ,  H04L47/283

摘要： A method and apparatus for splicing a first data flow inbound to an intermediate node and second data flow outbound from the intermediate node transforms the first data flow and the second data flow into a single composite data flow originating at the source of the first data flow and terminating at the destination of the second data flow. The method allows any other data flows associated with the first or second data flow, such as other data flows associated with connections that encompass either the first or second data flow, to remain unaffected by the splice. The method allows intermediate nodes in a network to influence data flow between a pair of nodes at or above the transport layer without incurring all the overhead commonly associated with transport and higher layer processing.

摘要翻译： 用于拼接入中间节点的第一数据流和从中间节点出站的第二数据流的方法和装置将第一数据流和第二数据流转换为源自第一数据流的源的单个复合数据流，以及 终止于第二数据流的目的地。 该方法允许与第一或第二数据流相关联的任何其他数据流，例如与包含第一或第二数据流的连接相关联的其他数据流，以保持不受拼接影响。 该方法允许网络中的中间节点影响传输层之上或之上的一对节点之间的数据流，而不会导致通常与传输和更高层处理相关联的所有开销。