PROCÉDÉ DE LOCALISATION D'UN DISPOSITIF MOBILE DANS UN ESPACE MULTIDIMENSIONNEL ET INFRASTRUCTURE CORRESPONDANTE

    公开(公告)号:EP4095543A1

    公开(公告)日:2022-11-30

    申请号:EP22173691.1

    申请日:2022-05-17

    申请人: Be Spoon

    发明人: JAMMES, Fabien

    摘要: Des satellites fixes (Si) émettent des signaux de synchronisation, mutuellement temporellement asynchrones. Un dispositif récepteur fixe (DR) reçoit ces signaux de synchronisation (SSYi) au même titre que le dispositif mobile (DM).
    Comme les signaux de synchronisation émis par les satellites ne sont pas temporellement synchronisés entre eux, le dispositif récepteur fixe va transmettre des informations temporelles manquantes (INFT) au dispositif mobile, élaborées à partir de la réception par le dispositif fixe de ces signaux de synchronisation, afin que le dispositif mobile puisse déterminer sa position.
    A l'inverse, si le dispositif récepteur fixe, ou bien une entité couplée au dispositif fixe, souhaite déterminer la position du dispositif mobile, c'est le dispositif mobile qui va transmettre au dispositif fixe les informations temporelles manquantes qui vont permettre au dispositif fixe ou à l'entité, de déterminer la position du dispositif mobile.

    CLOCK-ERROR ESTIMATION FOR TWO-CLOCK ELECTRONIC DEVICE

    公开(公告)号:EP3866019A1

    公开(公告)日:2021-08-18

    申请号:EP20305147.9

    申请日:2020-02-17

    申请人: Be Spoon

    发明人: FABRE, Pascal

    IPC分类号: G06F13/42 H04W56/00

    摘要: A method is disclosed for deriving an estimation value of a clock-error (E) for a slave clock (3), wherein the slave clock (3) is set at a nominal slave period (TLCLK_n) and outputs a sequence of slave clock signals (3') at an actual slave period (TLCLK) and wherein the difference between the actual slave period (TLCLK) and the nominal slave period (TLCLK_n) is approximated by the estimation value of the clock-error (E). The method includes:
    - receiving a sequence of master clock signals (5') at a master period (THCLK) that is output from a master clock (5), and a sequence of slave clock signals (3') at an actual slave period (TLCLK) that is output from the slave clock (3),
    - providing a measurement time period (43) that begins at a starting time point (43_s) and ends at an ending time point (43_e), wherein the measurement time period (43) includes a common multiple time period, the common multiple time period ends at the ending time point (43_e) and has a length in time that is a first multiple (n) of the nominal slave period (TLCLK_n) and is a second multiple (m) of the master period (THCLK),
    - providing a sequence of storing time points (43_i) temporally displaced within the common multiple time period by the actual slave period (TLCLK), the last of the storing time points being the ending time point (43_e) of the measurement time period (43),
    - starting to count the slave signals (3') and the master signals (5') at the starting time point (43_s),
    - for more than one storing time point (43_i), storing a master count value that represents the counted master signals (5') in association with the respective storing time point (43_i),
    - deriving an actual master count sum value by adding the stored master count values,
    - deriving, for the more than one storing time points, a nominal master count sum value, and
    - deriving the estimation of the clock-error (E) for the slave clock (3) by relating the actual master count sum value to the nominal count sum value.