公开(公告)号：US20110231680A1

公开(公告)日：2011-09-22

申请号：US12729194

申请日：2010-03-22

申请人： Venkata N. Padmanabhan ,  Ramachandran Ramjee ,  Tathagata Das ,  Pradeep Padala

发明人： Venkata N. Padmanabhan ,  Ramachandran Ramjee ,  Tathagata Das ,  Pradeep Padala

IPC分类号： G06F1/32 ,  G06F1/00 ,  G06F15/16 ,  G06F15/173

CPC分类号： G06F1/3209 ,  G06F9/5077 ,  G06F9/5094 ,  Y02D10/22 ,  Y02D10/36

摘要： Energy saving virtualization technique embodiments are presented that save energy by virtualizing a network-connected client computer's computing session (or a part thereof) as a virtual machine (VM) and then migrating it between the client computer and a VM server, depending on whether the computing session is active or idle. The client computer VM is migrated to the VM server when the client computer is deemed to be idle, and the VM is migrated back when the client computer is deemed to have re-entered an active condition. When the VM has been migrated away from the client computer and is residing on the VM server, the client computer is put into a sleep mode, thereby saving energy. However, the user's computing session remains alive on the VM server so that ongoing network connections and other activity are not disturbed.

摘要翻译： 提出了节能虚拟化技术实施例，其通过将网络连接的客户端计算机的计算会话（或其一部分）虚拟化为虚拟机（VM）并随后在客户端计算机和VM服务器之间迁移来节省能量，这取决于是否 计算会话处于活动状态或空闲状态。 当客户端计算机被认为是空闲时，客户端计算机VM被迁移到VM服务器，并且当客户端计算机被认为已经重新进入活动状态时，VM被迁移回来。 当VM已经从客户端计算机迁移并驻留在VM服务器上时，客户端计算机进入休眠模式，从而节省能源。 然而，用户的计算会话在VM服务器上仍然存在，从而不会妨碍正在进行的网络连接和其他活动。

公开(公告)号：US20090323516A1

公开(公告)日：2009-12-31

申请号：US12147522

申请日：2008-06-27

申请人： Ranjita Bhagwan ,  Bhavish Aggarwal ,  Venkata N. Padmanabhan ,  Geoffrey M. Voelker

发明人： Ranjita Bhagwan ,  Bhavish Aggarwal ,  Venkata N. Padmanabhan ,  Geoffrey M. Voelker

IPC分类号： G06F11/00

CPC分类号： H04L41/0866 ,  H04L41/0636 ,  H04L41/0853 ,  H04L41/0856

摘要： The method collects configuration data about the network, compares it to known good configurations to see if a corrective configuration is available. In addition, the method will review known bad configurations and determine if any of the successful corrective configurations for the bad configuration would be appropriate for the bad configuration under consideration.

摘要翻译： 该方法收集有关网络的配置数据，将其与已知的良好配置进行比较，以查看校正配置是否可用。 此外，该方法将检查已知的不良配置，并确定坏配置的成功校正配置是否适合所考虑的不良配置。

公开(公告)号：US07640215B2

公开(公告)日：2009-12-29

申请号：US11064677

申请日：2005-02-24

申请人： Yi-Min Wang ,  Qixiang Sun ,  Daniel R. Simon ,  Wilfred Russell ,  Lili Qiu ,  Venkata N. Padmanabhan

发明人： Yi-Min Wang ,  Qixiang Sun ,  Daniel R. Simon ,  Wilfred Russell ,  Lili Qiu ,  Venkata N. Padmanabhan

IPC分类号： G06F17/30

CPC分类号： H04L63/0407 ,  G06F2221/2107 ,  G06F2221/2119 ,  G06Q20/10 ,  G06Q20/102 ,  G06Q20/1085 ,  G06Q20/40 ,  H04L63/1408

摘要： A system and method is provided for evaluating the effectiveness of data encryption for hiding the identity of the source of Web traffic. A signature is constructed from encrypted Web traffic for a Web page sent by a target Web site, and the signature is compared with archived traffic signatures obtained by accessing various Web pages of interest in advance. If the signature of the detected encrypted Web traffic matches a stored traffic signature beyond a pre-set statistical threshold, a positive match is found, and the source of the traffic is identified. Countermeasures for reducing the reliability of source identification based on traffic signature matching are provided.

摘要翻译： 提供了一种系统和方法，用于评估数据加密的有效性，以隐藏Web流量来源的身份。 由目标网站发送的网页的加密Web流量构建签名，并将签名与通过预先访问各种感兴趣的网页获得的归档流量签名进行比较。 如果检测到的加密Web流量的签名与存储的流量签名匹配超过预定的统计阈值，则找到正匹配，并且识别流量的来源。 提供了基于流量特征匹配降低源识别可靠性的对策。

公开(公告)号：US07436772B2

公开(公告)日：2008-10-14

申请号：US11088130

申请日：2005-03-23

申请人： Jitendra D. Padhye ,  Venkata N. Padmanabhan

发明人： Jitendra D. Padhye ,  Venkata N. Padmanabhan

IPC分类号： G01R31/08 ,  H04J1/16 ,  H04J3/22 ,  H04J3/18 ,  G08C15/00 ,  H04L12/26 ,  H04L12/28

CPC分类号： H04L43/12 ,  H04L43/0858 ,  H04L43/0882

摘要： A new system and method of available bandwidth estimation applies even where the narrow link and tight link in a network path are in different locations. In embodiments of the invention, a unique packet probe series structure and processing is employed to estimate available bandwidth. In an embodiment of the invention, the spacing between probe packets is adjusted at the source to account for dilation caused by links leading to the tight link, so that the spacing is appropriate when the probes arrive at the tight link. Moreover, the multi-packet probe comprises a large packet followed by two much smaller packets. The large packet is then dropped once it has traversed the tight link. The two small packets, which are impacted little by subsequent narrow links, preserve the spacing set by the tight link, encoding the delay induced by the tight link, all the way to the destination.

摘要翻译： 即使在网络路径中的窄链路和紧密链路位于不同位置的情况下，也可以使用新的可用带宽估计系统和方法。 在本发明的实施例中，使用唯一的分组探测器序列结构和处理来估计可用带宽。 在本发明的一个实施例中，探测分组之间的间距在源处被调整以考虑由导致紧密连接的链路引起的扩张，使得当探针到达紧密连接时，间隔是适当的。 此外，多分组探测器包括大分组，后面是两个小得多的分组。 一旦该数据包已经穿过紧密链接，该数据包将被丢弃。 两个小包被后续的窄链接影响很小，保留了紧密链接设置的间距，将由紧密链接引起的延迟编码到目的地。

公开(公告)号：US20080165701A1

公开(公告)日：2008-07-10

申请号：US11765873

申请日：2007-06-20

申请人： Ganesh Ananthanarayanan ,  Venkata N. Padmanabhan ,  Chandramohan A. Thekkath ,  Lenin Ravindranath Sivalingam

发明人： Ganesh Ananthanarayanan ,  Venkata N. Padmanabhan ,  Chandramohan A. Thekkath ,  Lenin Ravindranath Sivalingam

IPC分类号： H04L12/28

CPC分类号： H04L67/06 ,  G06Q30/06 ,  H04L67/04 ,  H04L67/10

摘要： A system is disclosed for collaborative downloading that uses both the WLAN and the WWAN in combination, in an attempt to bridge the range-speed dichotomy. Devices in close vicinity band together their WWAN links, with the high-speed WLAN serving as the glue, to boost the effective wide-area bandwidth available to the active nodes.

摘要翻译： 公开了一种用于协同下载的系统，其组合使用WLAN和WWAN，以试图弥合范围速度二分法。 附近的设备将其WWAN链路捆绑在一起，高速WLAN用作胶水，以提升主动节点可用的有效宽带带宽。

公开(公告)号：US20070274324A1

公开(公告)日：2007-11-29

申请号：US11420616

申请日：2006-05-26

申请人： Yunnan Wu ,  Jitendra D. Padhye ,  Ranveer Chandra ,  Venkata N. Padmanabhan ,  Philip A. Chou ,  Mohamed Jawad Khaki

发明人： Yunnan Wu ,  Jitendra D. Padhye ,  Ranveer Chandra ,  Venkata N. Padmanabhan ,  Philip A. Chou ,  Mohamed Jawad Khaki

IPC分类号： H04L12/56

CPC分类号： H04L1/1874 ,  H04L1/0076 ,  H04L67/327 ,  H04W28/06 ,  H04W48/08 ,  H04W84/12

摘要： A local network coding framework and method including techniques to improve efficiency in a wireless network by reducing overhead. The local network coding method includes exchanging data availability between nodes on the wireless network by sending Bloom filters of lists of packets to neighboring nodes. Based on data availability, optimized mixing of pure packets is performed to form mixture packets for output. A separate acknowledgement buffer keeps track of the pure packets transmitted but not acknowledged. If an acknowledgement does not arrive after a certain time period, the packet is assumed to be lost and is retransmitted. An optimized packet mixing process generates mixture packets and decides which nodes to send the mixture packets. The local network coding framework and method also includes methods for representing the composition of a mixture packet and using mixing at a wireless access point to improve the performance of the wireless local area network.

摘要翻译： 本地网络编码框架和方法包括通过减少开销来提高无线网络的效率的技术。 本地网络编码方法包括通过向相邻节点发送分组列表的Bloom过滤器来在无线网络上的节点之间交换数据可用性。 基于数据可用性，执行纯数据包的优化混合，形成混合数据包进行输出。 单独的确认缓冲区跟踪发送但未确认的纯数据包。 如果确认在某个时间段之后未到达，则假定该分组丢失并被重发。 优化的分组混合过程产生混合分组，并决定哪些节点发送混合分组。 本地网络编码框架和方法还包括用于表示混合分组的组合并在无线接入点使用混合来改善无线局域网的性能的方法。

公开(公告)号：US07222285B2

公开(公告)日：2007-05-22

申请号：US10802648

申请日：2004-03-17

申请人： Philip Andrew Chou ,  Venkata N. Padmanabhan ,  Helen Wang

发明人： Philip Andrew Chou ,  Venkata N. Padmanabhan ,  Helen Wang

IPC分类号： H03M13/00

CPC分类号： H04N21/6405 ,  H04N19/39

摘要： A data sequence may be encoded in a plurality of layers of multiple description coding. The layers of multiple description coding may include a first and a second layer of multiple description coding. The first layer of multiple description coding may include an initial part of a data sequence as well as forward error correction code for the initial part. The second layer of multiple description coding may include a next part of the data sequence as well as forward error correction code for the next part. A first set of data sequence breakpoints may be determined for the first layer of multiple description coding. A second set of data sequence breakpoints may be determined for the second layer. The data sequence may be encoded in the plurality of layers of multiple description coding as a function of the first and second sets of data sequence breakpoints.

公开(公告)号：US06839560B1

公开(公告)日：2005-01-04

申请号：US09513155

申请日：2000-02-25

申请人： Paramvir Bahl ,  Venkata N. Padmanabhan

发明人： Paramvir Bahl ,  Venkata N. Padmanabhan

IPC分类号： G01S5/02 ,  G01S19/02 ,  G01S19/06 ,  H04L12/28 ,  H04L12/56 ,  H04W24/00 ,  H04W64/00 ,  H04W88/08 ,  H04Q7/20 ,  G01S3/02 ,  H04M11/00

CPC分类号： H04W64/00 ,  G01C21/206 ,  G01S5/0252 ,  G01S11/06 ,  H04W24/00 ,  H04W88/08

摘要： A method for locating a user in a wireless network is disclosed. A mobile computer seeking to determine its location within a building detects the signal strength of one or more wireless base stations placed at known locations throughout the building. The mobile computer uses this measured signal strength to determine its location via a signal-strength-to-location table look-up. A table of known locations within the building and the base station signal strength at those locations is searched to find the most similar stored signal strength to the signal strength detected. The location corresponding to the most similar stored signal strength is determined to be the current location of the mobile computer. Alternatively, a number of signal strengths from the table can be used and the corresponding locations can be spatially averaged to determine the location of the mobile computer. The table can be derived empirically, by placing a mobile computer at the known locations and detecting the signal strength of the wireless base stations at those locations, or the table can be derived mathematically by taking into account a reference signal strength, the distance between the reference point and the known location, and the number of walls between the reference point and the known location. As an alternative, the base stations can detect the signal strength of the mobile computer. In such a case, the table would relate a known position of the mobile computer to the signal strength of the mobile computer at that location as detected by the one or more base stations.

摘要翻译： 公开了一种用于定位无线网络中的用户的方法。 寻求确定其在建筑物内的位置的移动计算机检测放置在整个建筑物的已知位置处的一个或多个无线基站的信号强度。 移动计算机使用该测量的信号强度来通过信号强度到位置表查找来确定其位置。 搜索建筑物内已知位置的表格以及那些位置处的基站信号强度，以找到与检测到的信号强度最相似的存储信号强度。 将与最相似的存储信号强度对应的位置确定为移动计算机的当前位置。 或者，可以使用来自表格的多个信号强度，并且可以在空间上平均对应的位置以确定移动计算机的位置。 通过将移动计算机置于已知位置并检测在那些位置处的无线基站的信号强度，该表可以凭经验得出，或者可以通过考虑参考信号强度，数学上的参考信号强度， 参考点和已知位置，以及参考点和已知位置之间的壁数。 作为替代，基站可以检测移动计算机的信号强度。 在这种情况下，该表将将移动计算机的已知位置与由一个或多个基站检测到的该位置处的移动计算机的信号强度相关联。

公开(公告)号：US06799047B1

公开(公告)日：2004-09-28

申请号：US09513355

申请日：2000-02-25

申请人： Paramvir Bahl ,  Venkata N. Padmanabhan

发明人： Paramvir Bahl ,  Venkata N. Padmanabhan

IPC分类号： H04Q720

CPC分类号： G01C21/206 ,  G01S5/0252

摘要： A method for locating a user in a wireless network is disclosed. A mobile computer which seeks to determine its location within a building detects the signal strength of one or more wireless base stations placed at known locations throughout the building. An environmentally profiled table of known locations within the building and the base station signal strength at those locations is searched to find the stored signal strength most similar to the signal strength detected. The location corresponding to the most similar stored signal strength is determined to be the current location of the mobile computer. The table can be derived empirically, by placing a mobile computer at the known locations and measuring the signal strength of the wireless base stations at those locations, or it can be derived mathematically by taking into account a reference signal strength, the distance between the reference point and the known location, and the number of intervening walls between the reference point and the known location. As an alternative, the base stations can measure the signal strength of the mobile computer. In such a case, the table would relate a known position of the mobile computer to the signal strength of the mobile computer as measured by the one or more base stations. Environmental profiling is achieved by comparing several different tables, corresponding to several different environments, and using the table that minimizes the error. Environmental profiling can be applied to tables determined empirically or mathematically.

摘要翻译： 公开了一种用于定位无线网络中的用户的方法。 寻求确定其在建筑物内的位置的移动计算机检测放置在整个建筑物的已知位置处的一个或多个无线基站的信号强度。 搜索建筑物内已知位置的环境分析表以及那些位置处的基站信号强度，以找到与检测到的信号强度最相似的存储信号强度。 将与最相似的存储信号强度对应的位置确定为移动计算机的当前位置。 通过将移动计算机置于已知位置并测量那些位置处的无线基站的信号强度，或者可以通过考虑参考信号强度，参考信号的距离 点和已知位置，以及参考点和已知位置之间的居间壁数。 作为替代，基站可以测量移动计算机的信号强度。 在这种情况下，该表将将移动计算机的已知位置与由一个或多个基站测量的移动计算机的信号强度相关联。 通过比较几个不同的表，对应于几个不同的环境，并使用最小化错误的表来实现环境分析。 环境分析可以应用于凭经验或数学确定的表。