Patent ID: 9144082
Filing Date: 2015-09-22
Classification: G08C,H04B,H04J,H04L,H04W

Abstract:
1. A system for locating and tracking cellular mobile transceiver devices within corresponding areas covered by corresponding RF beams generated by an agile beam forming antenna subsystem, the system comprising: a cellular LTE base transceiver station adapted for RF frequency division duplexing (FDD) communication with a plurality of mobile transceiver devices within a cell coverage area of the cellular LTE base transceiver station, a cell being a sector operating a single carrier, the cellular LTE base transceiver station comprising an agile beam forming antenna subsystem that generates a number m different sets of fixed-position patterns of a number N RF beams, m and N being fixed positive integers, each RF beam covering a sub-area of the cell coverage area where the m sets of N RF beams cover the cell coverage area, and wherein m=1, 2, 3, or 4, and the agile beam forming antenna subsystem is adapted to generate each of the m sets of N RF beams in a different one-millisecond sub-frame of an LTE frame such that the m sets of N RF beams are generated in a sequence across four contiguous one-millisecond sub-frames and to enable operation of Hybrid-ARQ functionality with a 4 millisecond interval between a data packet transmission from a respective one of the plurality of mobile transceiver devices to the cellular LTE base transceiver station and an ACK or NAK sent from the cellular LTE base transceiver station in response to receipt of the data packet transmission, and with an 8 millisecond interval between the data packet transmission and a retransmission of the same data packet from the respective one of the plurality of mobile transceiver devices if a NAK is received, and further, wherein the cellular LTE base transceiver station is adapted to generate at least one of a CQI (channel quality index) measurement command and an SRS (sounding reference signal) command to the respective one of the plurality of mobile transceiver devices and 4 milliseconds later, the respective one of the plurality of mobile transceiver devices transmits at least one of a CQI measurement report and an SRS signal back to the base transceiver station, and wherein when a target mobile transceiver device first accesses the cellular LTE base transceiver station via one of a Random Access Procedure, a Handover Procedure, and a Service Request Procedure, the cellular LTE base transceiver station initiates an initial location determination algorithm that determines an initial location of the target mobile transceiver device by sending commands to the target mobile transceiver device commanding it to send at least one of an aperiodic CQI measurement report and an aperiodic SRS signal to the cellular LTE base transceiver station in each of at least m sub-frames, where each of the m sub-frames is one in which a different set of N RF beams is generated by the agile beam forming antenna subsystem, and wherein the responses received by the cellular LTE base transceiver station from the target mobile transceiver device are analyzed to determine at least one of the m times N RF beams generated by the agile beam forming antenna subsystem as being the best RF beam to cover the current location of the target mobile transceiver device for communication transmissions.