WI-FI SCAN SCHEDULING AND POWER ADAPTATION FOR LOW-POWER INDOOR LOCATION

摘要

Embodiments of a mobile station and method for Wi-Fi scan scheduling and power adaption for low-power indoor location are generally described herein. In some embodiments, the mobile station may identify channels, beacon timing and rough signal strength levels of nearby access points (APs) from at least one of a previous full-channel scan or a Wi-Fi fingerprint database and may configure receiver sensitivity based on the rough signal strength levels for receipt of subsequent beacons. The mobile station may wake-up from a low-power state to receive beacons for the nearby access points on the identified channels at times based on the identified beacon timing. The received signal strength indicators (RSSIs) levels of the received beacons may be used for location determination.

主权项

1. A method performed by a mobile station (STA) for determining access points for use for location references, the method comprising:
ranking channels, based on a number of access points detected on each channel; identifying a group of the access points operating on a particular set of the ranked channels; determining timing and channel predictions for beacons from each of the identified access points of the group; waking from a low-power state to receive the beacons on predicted channels at predicted times based on the timing and channel predictions; updating received signal strength indicators (RSSIs) for each access point, based on signal strengths of the beacons; and updating an indoor location based on the RSSIs and known locations of the access points in the group.