Abstract: A method and system for detecting the position of a mobile unit efficiently and with high precision in a multipath environment. A wireless position detection system made up of a mobile station containing a wireless communication means to allow sending and receiving multiple to and from mutually different antenna positions and, a base station for performing wireless communication with mobile stations containing a wireless communication means and, multiple wireless receivers for receiving each of the multiple signals sent by the wireless communication means between the base stations and, a server for detecting the position of the mobile station from each wireless receiver and from the position of the base station, and the time relating to received signals measured by the multiple wireless receivers.

Abstract: A position detection method employed in a position detection system for detecting the position of a terminal of a radio communication system is provided which determines propagation times of a signal between the terminal and a plurality of access points located around the terminal by the principle of trilateration, thus permitting reduction in position detection time. The invention comprises means for determining a movement velocity of the terminal from a temporal history of positional information about the terminal obtained by position detection with the trilateration, means for grouping the terminals with low relative velocities based on the terminal movement velocities, a control database including the terminal position information, the terminal movement velocities, and the group information as components, and means for determining a detection cycle of the terminal of interest for position detection using the control database.

Abstract: A position detection method employed in a position detection system for detecting the position of a terminal of a radio communication system is provided which determines propagation times of a signal between the terminal and a plurality of access points located around the terminal by the principle of trilateration, thus permitting reduction in position detection time. The invention comprises means for determining a movement velocity of the terminal from a temporal history of positional information about the terminal obtained by position detection with the trilateration, means for grouping the terminals with low relative velocities based on the terminal movement velocities, a control database including the terminal position information, the terminal movement velocities, and the group information as components, and means for determining a detection cycle of the terminal of interest for position detection using the control database.

Abstract: A method and system for detecting the position of a mobile unit efficiently and with high precision in a multipath environment. A wireless position detection system made up of a mobile station containing a wireless communication means to allow sending and receiving multiple to and from mutually different antenna positions and, a base station for performing wireless communication with mobile stations containing a wireless communication means and, multiple wireless receivers for receiving each of the multiple signals sent by the wireless communication means between the base stations and, a server for detecting the position of the mobile station from each wireless receiver and from the position of the base station, and the time relating to received signals measured by the multiple wireless receivers.

Abstract: A hybrid cellular mobile communication system is disclosed that contains a first layer having a plurality of radio communication micro-cells, and a second layer of radio communication cells of a larger size which, in operation, overlay the micro-cells. The hybrid cellular system provides that when a control switching center detects rapid amounts of micro-cell to micro-cell transfers of an ongoing call (such as when a call is occurring from a car moving on a highway), the call is transferred to the second cellular layer for handling. The second cellular layer includes cells which cover a larger geometric area, thereby reducing the number of "hand-offs" or transfers that the call would undergo when the mobile telephone user is traveling quickly across the geographic areas covered by the micro-cells.