Information distribution system
    11.
    发明申请
    Information distribution system 审中-公开
    信息分发系统

    公开(公告)号:US20050237934A1

    公开(公告)日:2005-10-27

    申请号:US11108056

    申请日:2005-04-18

    CPC分类号: G08G1/07 H04L1/0003

    摘要: Disclosed is an information distribution system capable of distributing high quality data without lowering throughput of a network even in a communication area where many movable bodies could be traveling. The information distribution system comprises a radio transmission unit for transmitting data signals at a transmission rate being variable; a detection unit for detecting speed control information for a mobile object having a receiver for receiving data signals transmitted without wires from the radio transmission unit; and a transmission rate setting unit for changing the transmission rate of the data signals according to the speed control information.

    摘要翻译: 公开了一种即使在许多移动体可以行进的通信区域中也能够分配高质量数据而不降低网络吞吐量的信息分配系统。 信息分发系统包括:无线传输单元,用于以可变的传输速率传输数据信号; 检测单元,用于检测具有接收机的移动对象的速度控制信息,所述接收机用于从所述无线电传输单元接收无线传输的数据信号; 以及传输速率设定单元,用于根据速度控制信息改变数据信号的传输速率。

    Apparatus and method for positioning of a GPS receiver
    14.
    发明授权
    Apparatus and method for positioning of a GPS receiver 失效
    GPS接收机定位装置及方法

    公开(公告)号:US5248981A

    公开(公告)日:1993-09-28

    申请号:US657784

    申请日:1991-02-20

    IPC分类号: G01S1/00

    CPC分类号: G01S19/14 G01S19/36 G01S19/42

    摘要: A GPS receiver and related method for positioning on the Globe. The GPS receiver receives satellite signals in a sequential manner with a plurality of antennas, whereby any of the plurality of antennas which receives satellite signals from the maximum number of GPS satellites is selected by an antenna switching unit under the control of a control unit, a combination of GPS satellites having the smallest PDOP value or the signal strength in due order is selected by the control unit from among all of GPS satellites in contact with respective antennas when each of the antennas fails to receive satellite signals transmitted by the predetermined minimum number of GPS satellites. The related positioning method is for use with a motor vehicle-mounted GPS receiver having a plurality of receiving channels, wherein each receiving channel independently receives satellite signals from the GPS satellites in contact, a required number of GPS satellites which are currently considered to be the most suitable for positioning in view of PDOP value are selected from among all of GPS satellites in contact through each receiving channel, and thereby a GPS satellite other than the selected ones may be substituted for the obstructed GPS satellite for carrying out the positioning by making use of navigation data of the newly selected GPS satellite without any intermission.

    System for identifying a responding station for a radio communications
system
    15.
    发明授权
    System for identifying a responding station for a radio communications system 失效
    用于识别无线电通信系统的响应站的系统

    公开(公告)号:US4628537A

    公开(公告)日:1986-12-09

    申请号:US543056

    申请日:1983-10-18

    IPC分类号: H04W12/06 H04B7/00

    CPC分类号: H04W88/022

    摘要: A communications system for identifying a responding station called by a communications system caller station over a call channel and a plurality of speech channels. The system transmits information from the caller station, such as the selected speech channel and the designated responding station through the call channel, and receives information from a responding station on the selected speech channel. The communication between the communications system and the responding station on the selected speech channel is enabled only when information from the responding station is identical to information of the designated responding station transmitted from the communications system.

    摘要翻译: 一种通信系统,用于通过呼叫信道和多个语音信道识别由通信系统呼叫者呼叫的响应站。 该系统通过呼叫信道从诸如所选择的语音信道和指定的响应站之类的主叫站发送信息,并且在所选语音信道上从响应站接收信息。 只有当来自响应站的信息与从通信系统发送的指定的响应站的信息相同时,才能启用通信系统与所选语音信道上的响应站之间的通信。