| 摘要 |
Method, apparatus, and computer program product for wireless position determination. According to an example embodiment, location determination of a mobile device may be performed by network elements using RSSI and/or RCPI of a mobile device measured beacon from each of a plurality of access point devices. Location determination of a mobile device may be performed by network elements using WiFi Timing Measurement Action Frames to enable receiving the location of the mobile device, derived from flight times of respective signals over a plurality of the signal paths for a plurality of access point devices connected in a common network. Location determination may be performed by a mobile device using WiFi Timing Measurement Request Frames to enable receiving the location of the mobile device, derived from flight times of signal paths for a plurality of access point devices that are not connected in a common network. |
| 主权项 |
1. A method, comprising:
while a connection exists between a mobile device and an access point; receiving, by the access point, a request from the mobile device, to identify the location of the mobile device; transmitting, by the access point, a response message requesting the mobile device to repeat the request after a comeback delay that is specified in the response message; transmitting, by the access point, a beacon measurement request to the mobile device, requesting the mobile device to perform a scan and report a beacon measurement back to the access point, the beacon measurement request indicating a measurement time shorter than the comeback delay; receiving, by the access point, a beacon measurement report message from the mobile device, including at least a first measurement of at least one of a received signal strength indication or a received channel power indication of beacons received by the mobile device from the access point and at least a second measurement of at least one of a received signal strength indication or a received channel power indication of beacons received by the mobile device from at least one other access point within range of the mobile device; estimating, by the access point, before expiration of the comeback delay, the location of the mobile device, based on known locations of the access point and the at least one other access point reported in the beacon measurement report message and based on known approximate footprints of the access point and the at least one other access point reported in the beacon measurement report message, receiving, by the access point, at a time corresponding to expiration of the comeback delay, a subsequent request from the mobile device, to identify the location of the mobile device, the subsequent request; and transmitting, by the access point, a location estimation message to the mobile device, including an estimation of the location of the mobile device, based on known locations of the access point and the at least one other access point reported in the beacon measurement report message and based on known approximate footprints of the access point and the at least one other access point reported in the beacon measurement report message. |
