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    • 1. 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。
    • 2. 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方法
    • US20130021202A1
    • 2013-01-24
    • US13564468
    • 2012-08-01
    • Shaowei HANWentao ZHANG
    • Shaowei HANWentao ZHANG
    • G01S19/25
    • 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。