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    • 1. 发明授权
    • Navigation signal receiver trajectory determination
    • 导航信号接收机轨迹确定
    • US07439907B2
    • 2008-10-21
    • US11561758
    • 2006-11-20
    • Chi-Shin WangDavid WangWentao ZhangJun MoLei Dong
    • Chi-Shin WangDavid WangWentao ZhangJun MoLei Dong
    • G01S3/14
    • G01S19/49G01S19/40
    • The present invention provides methods and systems that enable a mobile navigation receiver to accurately determine its trajectory with non-current ephemeris in stand-alone mode. In an embodiment, the receiver computes the position for the same location using non-current ephemeris and current ephemeris at different time instances. The receiver then determines a position correction by finding the difference between these two computed positions, and applies this correction to the trajectory generated with non-current ephemeris to obtain a more accurate trajectory. In another embodiment, the receiver computes an initial position of the receiver using non-current ephemeris and finds the difference between the computed initial position and an accurate approximation of the initial position. The receiver then shifts the subsequent receiver trajectory computed using non-current ephemeris by the difference to obtain a more accurate trajectory.
    • 本发明提供使移动导航接收机能够以独立模式的非当前星历精确地确定其轨迹的方法和系统。 在一个实施例中,接收机使用不同时间的非当前星历和当前星历表计算相同位置的位置。 然后,接收机通过找到这两个计算位置之间的差异来确定位置校正,并将该校正应用于由非当前星历产生的轨迹,以获得更准确的轨迹。 在另一个实施例中,接收机使用非当前星历表计算接收机的初始位置,并且找出所计算的初始位置与初始位置的精确近似之间的差。 然后,接收器将使用非当前星历计算的后续接收器轨迹移动该差,以获得更准确的轨迹。
    • 2. 发明申请
    • NAVIGATION SIGNAL RECEIVER TRAJECTORY DETERMINATION
    • 导航信号接收机测距
    • US20080117100A1
    • 2008-05-22
    • US11561758
    • 2006-11-20
    • Chi-Shin WangDavid WangWentao ZhangJun MoLei Dong
    • Chi-Shin WangDavid WangWentao ZhangJun MoLei Dong
    • G01S5/14
    • G01S19/49G01S19/40
    • The present invention provides methods and systems that enable a mobile navigation receiver to accurately determine its trajectory with non-current ephemeris in stand-alone mode. In an embodiment, the receiver computes the position for the same location using non-current ephemeris and current ephemeris at different time instances. The receiver then determines a position correction by finding the difference between these two computed positions, and applies this correction to the trajectory generated with non-current ephemeris to obtain a more accurate trajectory. In another embodiment, the receiver computes an initial position of the receiver using non-current ephemeris and finds the difference between the computed initial position and an accurate approximation of the initial position. The receiver then shifts the subsequent receiver trajectory computed using non-current ephemeris by the difference to obtain a more accurate trajectory.
    • 本发明提供使移动导航接收机能够以独立模式的非当前星历精确地确定其轨迹的方法和系统。 在一个实施例中,接收机使用不同时间的非当前星历和当前星历表计算相同位置的位置。 然后,接收机通过找到这两个计算位置之间的差异来确定位置校正,并将该校正应用于由非当前星历产生的轨迹,以获得更准确的轨迹。 在另一个实施例中,接收机使用非当前星历表计算接收机的初始位置,并且找出所计算的初始位置与初始位置的精确近似之间的差。 然后,接收器将使用非当前星历计算的后续接收器轨迹移动该差,以获得更准确的轨迹。
    • 4. 发明授权
    • Systems and methods of communication in an assisted navigation system
    • 辅助导航系统中的通信系统和方法
    • US08635016B2
    • 2014-01-21
    • US13564468
    • 2012-08-01
    • Shaowei HanWentao Zhang
    • Shaowei HanWentao Zhang
    • G01C21/00
    • G01S19/25G01S19/05G01S19/27
    • Provided herein are methods and systems for efficient communication between a server and a client in an assisted navigation system. In one or more embodiments, the server transmits a set of parameters for a satellite to the client, e.g., a GPS receiver, via a wireless or wired connection. The set of parameters includes a force parameter, initial condition parameters and time correction coefficients for the satellite. The receiver uses the received parameters in a numerical integration to compute the position of the satellite at a desired time. The set of parameters needed for the integration is small. To further reduce the amount of data transmitted, reference parameters may be subtracted from the original parameters before transmission from the server. The receiver is able to reconstruct the original parameters from the received parameters and the identically computed reference parameters. The parameters may be further compressed using data compression techniques.
    • 这里提供了用于在辅助导航系统中的服务器和客户端之间的有效通信的方法和系统。 在一个或多个实施例中,服务器经由无线或有线连接向卫星发送一组用于卫星的参数,例如GPS接收机。 该组参数包括一个力参数,初始条件参数和卫星的时间校正系数。 接收机使用数字积分中接收到的参数来计算卫星在所需时间的位置。 集成所需的一组参数很小。 为了进一步减少发送的数据量,可以在从服务器发送之前从原始参数中减去参考参数。 接收机能够从接收的参数和相同计算的参考参数重建原始参数。 可以使用数据压缩技术来进一步压缩参数。
    • 6. 发明申请
    • SYSTEMS AND METHODS OF COMMUNICATION IN AN ASSISTED NAVIGATION SYSTEM
    • 辅助导航系统中的通信系统和通信方法
    • US20090237300A1
    • 2009-09-24
    • US12476458
    • 2009-06-02
    • Shaowei HANWentao Zhang
    • Shaowei HANWentao Zhang
    • G01S1/00
    • G01S19/25G01S19/05G01S19/27
    • Provided herein are methods and systems for efficient communication between a server and a client in an assisted navigation system. In one or more embodiments, the client, e.g., a GPS receiver, receives a set of parameters for a satellite from the server via a wireless or wired connection. The set of parameters includes a force parameter, initial condition parameters and time correction coefficients for the satellite. The receiver uses the received parameters in a numerical integration to compute the position of the satellite at a desired time. The set of parameters needed for the integration is small compared to current methods which require sending more data to the client. Thus these parameters require less communication resources to transmit. To further reduce the amount of data that needs to be transmitted, reference parameters may be subtracted from the original parameters before transmission from the server. The receiver is able to reconstruct the original parameters from the received parameters and the identically computed reference parameters. The parameters may be further compressed using data compression techniques.
    • 这里提供了用于在辅助导航系统中的服务器和客户端之间的有效通信的方法和系统。 在一个或多个实施例中,客户端,例如GPS接收器经由无线或有线连接从服务器接收卫星的一组参数。 该组参数包括一个力参数,初始条件参数和卫星的时间校正系数。 接收机使用数字积分中接收到的参数来计算卫星在所需时间的位置。 与需要向客户端发送更多数据的当前方法相比,集成所需的一组参数较小。 因此,这些参数需要更少的通信资源进行传输。 为了进一步减少需要传输的数据量,可以在从服务器发送之前从原始参数中减去参考参数。 接收机能够从接收的参数和相同计算的参考参数重建原始参数。 可以使用数据压缩技术来进一步压缩参数。
    • 7. 发明授权
    • Packet switched communication precedence at a multi-mode communication device
    • 分组交换通信优先级在多模式通信设备
    • US09319853B2
    • 2016-04-19
    • US13812136
    • 2010-08-27
    • Yan LiLu GaoWentao Zhang
    • Yan LiLu GaoWentao Zhang
    • H04L12/16H04W4/12H04W88/06
    • H04W4/12H04W88/06
    • A circuit switched (CS) paging message is received at a multi-mode communication device. The CS paging message is received when a packet switched (PS) service is active at the multi-mode communication device. A PS precedence feature is activated at the multi-mode communication device that prioritizes PS communications over CS communications. A CS bearer connection is established with a CS network in response to receiving the CS paging message, and an incoming call notification message that identifies a calling party is received from the CS network. Upon receipt of the incoming call notification message, the CS bearer connection with the CS network is released. A notification of a missed incoming call from the calling party is displayed (e.g., substantially in real-time) via a user interface.
    • 在多模式通信设备处接收电路交换(CS)寻呼消息。 当分组交换(PS)服务在多模式通信设备处于活动状态时,CS寻呼消息被接收。 在多模式通信设备中激活PS优先级特征,通过CS通信优先考虑PS通信。 响应于CS寻呼消息,与CS网络建立CS承载连接,并且从CS网络接收到识别呼叫方的呼入通知消息。 在接收到来电通知消息时,释放与CS网络的CS承载连接。 来自主叫方的未接来电的通知经由用户界面显示(例如,基本上实时地)。