DISPLACEMENT POSITIONING SIGNALING AND REPORTING

    公开(公告)号:US20240337720A1

    公开(公告)日:2024-10-10

    申请号:US18295784

    申请日:2023-04-04

    摘要: A first network node may receive a first set of sounding reference signals (SRSs) and a second set of SRSs from a wireless device. The first network node may measure the first set of SRSs and the second set of SRSs. The first network node may calculate a set of displacement radio frequency fingerprint (RFFP) measurements based on the measured first set of SRSs and measured second set of SRSs. The first network node may output the set of displacement RFFP measurements to a positioning model by locally calculating the set of displacement information using the positioning model based on the set of displacement RFFP measurements or by transmitting the set of displacement RFFP measurements to a second network node to calculate a set of displacement information using the positioning model.

    In-building tracking system for distributed antenna systems

    公开(公告)号:US12004044B2

    公开(公告)日:2024-06-04

    申请号:US17403591

    申请日:2021-08-16

    申请人: Nextivity, Inc.

    摘要: A system and method for determining a position of a first responder in a building, where the first responder is using a radio, and using a distributed antenna system. Each antenna has a level detector to detect and measure a strength of an input signal from the radio of the first responder to produce a level signal, a time tagger to tag the detected input signal with a timing signal, and a communication module to transmit the level signal and timing signal. A sensor processor connected with a signal distribution network is configured to receive the signal level and timing signal from the signal distribution network of each of the plurality of antennas, to determine the position of the radio relative to each of the plurality of antennas according to the level signal and timing signal.

    INDOOR WIRELESS POSITIONING METHOD BASED ON VARIABILITY FEATURE, SYSTEM AND DEVICE THEREFOR

    公开(公告)号:US20240129890A1

    公开(公告)日:2024-04-18

    申请号:US18223955

    申请日:2023-07-19

    IPC分类号: H04W64/00 H04B17/27

    CPC分类号: H04W64/006 H04B17/27

    摘要: An indoor wireless positioning method according to one embodiment of the present invention includes receiving initial received signal strength indicator (RSSI) information from a reception unit; searching for a fingerprint matching measured initial RSSI information in a fingerprint database; determining a first location corresponding to the retrieved fingerprint to be an initial location of the reception unit; receiving additional RSSI information from the reception unit; extracting features of variability between the additional RSSI information and the initial RSSI information; searching for variability fingerprints matching the initial location and extracted RSSI variability features in a variability fingerprint database; and updating a second location to a current location of the reception unit when the second location corresponding to the retrieved variability fingerprint is different from the initial location, wherein the second location is a location in a candidate area within a preset distance range centered on the first location.