| 摘要 |
During access point discovery, an initial list of access points available for connection is generated (e.g. obtained by passive scan). The received signal strength indication (RSSI) and round trip time (RTT) delay for the access points in the initial list are measured, e.g., during discovery and by a plurality of active measurements (e.g. an initial and a subsequent RTT and RSSI measurements, or e.g. a quick succession of a plurality of active measurements in the order of few hundred microseconds). The initial list is pruned based on an initial and subsequent RSSI and RTT measurements to produce a master list of access points. The pruning of the initial list of access points may be based on the differentials in the RSSI measurements and the RTT measurements as well as a determination of access points that the mobile device is moving away from (or towards them). As the mobile device moves to different locations, access points from the master list may be selected and connected with based on the expected duration of availability as determined by RSSI and RTT measurements. |
