Decreasing RSSI settling time in low-power mode systems

摘要

Methods and apparatuses presented herein advantageously enable more accurate RSSI measurements by waking up a mobile device from a low-power mode in certain pre-designated situations. These situations include detecting certain trends in RSSI values, detecting changes in transmit power, or detecting motion. The trigger which causes the mobile device to enter the active mode from the low power mode may differ in varying examples.

主权项

1. A method for measuring RSSI comprising:
receiving a first plurality of RSSI values at a first rate during operation of a mobile device in a reduced power mode; processing the first plurality of RSSI values to identify a current movement of the mobile device with respect to a base unit during the reduced power mode, wherein the processing comprises identifying a trend in the first plurality of RSSI values; entering an active mode at the mobile device responsive to identification of the current movement of the mobile device with respect to the base unit, the active mode comprising receiving a plurality of RSSI values at a second rate higher than the first rate; receiving a second plurality of RSSI values at the second rate during operation of the mobile device in the active mode; and processing the second plurality of RSSI values to determine a range of the mobile device with respect to the base unit.