public void updateGlobleTime(Long globalTime, String imsi) {
        for (Map.Entry<String, User> entry: detectors.entrySet()) {
            String currImsi = entry.getKey();
            User user = entry.getValue();
            if (!(imsi.equals(currImsi)) && (user != null)) {
                user.updateGlobleTime(globalTime);
            }
        }
    }