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    • 91. 发明授权
    • Passive system for recovering cryptography keys
    • 用于恢复加密密钥的被动系统
    • US08675863B2
    • 2014-03-18
    • US12645123
    • 2009-12-22
    • Robert J. Anderson
    • Robert J. Anderson
    • H04L9/00H04L29/06
    • H04L63/30H04W12/02H04W12/04
    • Modern cellular wireless communications providers strive to keep their network and subscribers secure through various means. The identity of the subscriber may be obfuscated through the use of a temporary identifier for most network transactions including signaling events, voice calls, SMS messages and data sessions. A subscriber's unique identity may only be transmitted over the air in an encrypted form. Similarly, the content of voice calls, SMS messages and data sessions may also be encrypted when transmitted over the air and even when transferred over internal network interfaces. However, the use of encryption presents significant challenges for law enforcement communities when court ordered lawful intercept is required to monitor and locate subscribers utilizing the wireless networks for illegal and/or terrorist purposes. A technique to aid in the determination of a subscriber's unique wireless identity and the decryption of encrypted signals would be very useful for lawful intercept. In this document we describe an architecture and technique to aid in the decryption of encrypted wireless signals for lawful intercept by determining the current encryption key. It may also be used to decrypt encrypted signals on internal interfaces of the wireless and wireline networks.
    • 现代蜂窝无线通信提供商努力通过各种方式保持网络和用户的安全。 可以通过对大多数网络事务使用临时标识符来混淆订户的身份,包括信令事件,语音呼叫,SMS消息和数据会话。 用户的唯一身份只能以加密形式通过空中传输。 类似地,即使在通过内部网络接口传输时,语音呼叫,SMS消息和数据会话的内容也可以通过空中传输进行加密。 然而,当法院命令合法拦截需要监视和定位利用无线网络进行非法和/或恐怖活动的用户时,加密使用对执法团体来说是一个重大的挑战。 一种帮助确定用户唯一无线身份和加密信号解密的技术对于合法拦截将是非常有用的。 在本文中,我们描述了一种通过确定当前加密密钥来帮助解密加密无线信号以进行合法拦截的架构和技术。 它也可以用于解密无线和有线网络的内部接口上的加密信号。
    • 92. 发明授权
    • Unauthorized location detection and countermeasures
    • 未经授权的位置检测和对策
    • US08627484B2
    • 2014-01-07
    • US12976908
    • 2010-12-22
    • Frederic A. BeckleyRobert J. AndersonMatthew L. Ward
    • Frederic A. BeckleyRobert J. AndersonMatthew L. Ward
    • G06F21/00
    • H04W12/02H04W4/02H04W4/50H04W12/08H04W12/12
    • A location sentry system is provided for use within a mobile device. The sentry system can be configured to detect unauthorized attempts to locate mobile devices by monitoring messages passed between the mobile device and the wireless network and/or messages passed between components of the mobile device, and determining that one or more of the messages is/are indicative of an attempt to locate the mobile device. In response to a determination that an unauthorized attempt has been detected, the location sentry can be configured to take one or more actions. For example, the location sentry system could prevent location information from being sent back to the wireless network and/or the location sentry system could cause incorrect information to be sent to the wireless network.
    • 位置哨兵系统被提供用于在移动设备内使用。 哨兵系统可被配置为通过监视在移动设备和无线网络之间传递的消息和/或在移动设备的组件之间传递的消息来检测未经授权的尝试来定位移动设备,并且确定一个或多个消息是 指示尝试定位移动设备。 响应于已经检测到未经授权的尝试的确定,位置哨兵可被配置为采取一个或多个动作。 例如,位置哨兵系统可以防止位置信息被发送回无线网络和/或位置哨兵系统可能导致不正确的信息被发送到无线网络。
    • 93. 发明授权
    • Network based location of mobile transmitters
    • 移动发射机的基于网络的位置
    • US08526391B2
    • 2013-09-03
    • US12842861
    • 2010-07-23
    • Simon IssakovRashidus S. MiaRobert J. Anderson
    • Simon IssakovRashidus S. MiaRobert J. Anderson
    • H04W4/00
    • H04W24/02G01S5/0221G01S5/06H04W24/10H04W28/18H04W64/00H04W72/12
    • In an LTE environment, the sensitivity of wireless location system receivers to narrowband transmissions, and the resolution of the receivers to wideband transmissions, may be improved by using tailored uplink transmission parameters, thereby increasing location accuracy and decreasing latency in developing a location. A first method for increasing TDOA performance allows LMU receivers to integrate TDOA and/or AOA measurements over longer periods of time, and thus achieve higher sensitivity. This method employs the Semi-Persistent-Scheduling (SPS) feature of the LTE communications system. A second method for increasing TDOA performance allows LMUs to collect signals over a broader bandwidth, and thus achieve higher resolution. This method uses the Sounding Reference Signal (SRS) feature of the LTE system. Using both the SPS and SRS functions for U-TDOA locations provides the benefit of increased sensitivity and greater resolution, thereby providing the potential for significantly improved location performance.
    • 在LTE环境中,可以通过使用定制的上行链路传输参数来改善无线定位系统接收机对窄带传输的灵敏度以及接收机对宽带传输的分辨率,从而在开发位置时增加定位精度和降低延迟。 增加TDOA性能的第一种方法允许LMU接收机在更长的时间内集成TDOA和/或AOA测量,从而实现更高的灵敏度。 该方法采用LTE通信系统的半持续调度(SPS)特性。 增加TDOA性能的第二种方法允许LMU在更宽的带宽上收集信号,从而实现更高的分辨率。 该方法使用LTE系统的探测参考信号(SRS)特征。 对于U-TDOA位置同时使用SPS和SRS功能提供了增加灵敏度和更高分辨率的优点,从而提供了显着提高位置性能的潜力。
    • 97. 发明授权
    • Hybrid GNSS and TDOA wireless location system
    • 混合GNSS和TDOA无线定位系统
    • US08059028B2
    • 2011-11-15
    • US12192057
    • 2008-08-14
    • Pete A. BoyerRonald LeFeverRashidus S. MiaRobert J. Anderson
    • Pete A. BoyerRonald LeFeverRashidus S. MiaRobert J. Anderson
    • G01S19/46
    • G01S19/46
    • A method and apparatus for position determination is provided using measurements from both Global Positioning System (GPS) receivers and terrestrial-based Uplink Time Difference of Arrival (UTDOA) receivers. The method involves the transformation of downlink satellite measurements into equivalent UTDOA measurements by computing comparable cross-correlation coefficients and time differences of arrival with respect to a UTDOA reference station. The method includes a weighting operation whereby the relative weights of the UTDOA measurements and the relative weights of the GPS measurements are adjusted based on a theoretical scaling followed by empirical adjustments. The method further involves the efficient computation and combining of metrics that are used to minimize the weighted error between candidate location solutions and the UTDOA and GPS measurements. This is done efficiently in two dimensions for UTDOA and in three dimensions for GPS measurements by increasing the complexity of searching operations as the optimal location solution is approached. A technique is also described that improves upon a particular location solution by changing the measurement weightings using criteria specific to GPS and UTDOA.
    • 使用来自全球定位系统(GPS)接收机和基于地面的上行链路到达时差(UTDOA)接收机的测量来提供用于位置确定的方法和装置。 该方法涉及通过计算相对于UTDOA参考站的可比互相关系数和到达时间差来将下行链路卫星测量转换成等效的UTDOA测量。 该方法包括一个加权操作,其中UTDOA测量的相对权重和GPS测量的相对权重基于经验调整后的理论缩放来调整。 该方法还涉及用于最小化候选位置解决方案与UTDOA和GPS测量之间的加权误差的度量的有效计算和组合。 对于UTDOA,这在二维方面有效地进行,并且通过在接近最佳位置解决方案时通过增加搜索操作的复杂度来进行GPS测量。 还描述了一种技术,其通过使用针对GPS和UTDOA的标准改变测量权重来改进特定位置解决方案。
    • 99. 发明授权
    • Systems and methods for a snapshot of data
    • 数据快照的系统和方法
    • US08010493B2
    • 2011-08-30
    • US12717840
    • 2010-03-04
    • Robert J. AndersonNeal T. FachanEric M. LemarAaron J. PasseyDavid W. RichardsDarren P. Schack
    • Robert J. AndersonNeal T. FachanEric M. LemarAaron J. PasseyDavid W. RichardsDarren P. Schack
    • G06F7/04G06F17/30
    • G06F17/30088G06F17/3015Y10S707/99955
    • In one embodiment, a user or client device is connected to a distributed file system comprised of one or more physical nodes. The data on each of the physical nodes store metadata about files and directories within the file system. Some of the embodiments permit a user to take a snapshot of data stored on the file system. The snapshot may include a single file, a single directory, a plurality of files within a directory, a plurality of directories, a path on the file system that includes nested files and subdirectories, or more than one path on the file system that each includes nested files and directories. In one embodiment, the metadata comprises mini-snapshots for directories representing a path from the root of the file system to the root of the snapshot. The mini-snapshots serve as stand-ins for portions of the file system which are not included in the snapshot, but which permit access to the snapshot data in an intuitive way.
    • 在一个实施例中,用户或客户端设备连接到由一个或多个物理节点组成的分布式文件系统。 每个物理节点上的数据存储有关文件系统内的文件和目录的元数据。 一些实施例允许用户拍摄存储在文件系统上的数据的快照。 快照可以包括单个文件,单个目录,目录内的多个文件,多个目录,文件系统上包括嵌套文件和子目录的路径,或者文件系统上的多于一个路径,每个路径包括 嵌套文件和目录。 在一个实施例中,元数据包括用于表示从文件系统的根到快照的根的路径的目录的小型快照。 微型快照作为文件系统中未包含在快照中的部分的备用,但允许以直观的方式访问快照数据。