Abstract:
In one example embodiment, a certified location service enables a mobile device to access a location-based service when a determined location meets a location requirement and an overall confidence score for the determined location exceeds a confidence threshold. A data package is received including identifiers of beacons observed by the mobile device, and a location of the mobile device is determined based on a calculated location of one or more of the beacons. An overall confidence score for the determined location is calculated based on one or more individual confidence scores for the one or more beacons used in determining the location or composite confidence scores for types of the one or more beacons. The determined location and the overall confidence score are provided to one or more provider servers that allow the mobile device to access a location-based service based thereon.
Abstract:
In one embodiment, a processing technique is provided that utilizes multiple network address observations. One or more records are obtained that maintain network address observations, each network address observation associating one or more attributes with a network address observed by one or more source devices. Multiple network addresses from the network address observations are clustered into one or more discrete groups of network addresses based on a clustering criteria. For a selected group of network addresses, an association is formed associating one or more refined attributes derived from the selected group with an individual network address that is a member of the selected group.
Abstract:
In one embodiment, techniques approximate concurrent monitoring of a large number of geo-fences, potentially beyond a number supported by a mobile device, The mobile device may obtain a set of geo-fences and maintain a first subset of the geo-fences as an active subset of geo-fences and a second subset of the geo-fences as an inactive subset of geo-fences. The mobile device may also establish and monitor an envelope geo-fences that excluded the inactive subset of geo-fence. In response to detecting that the mobile device has moved to a new location proximate to the envelope geo-fence, one or more geo-fences are moved between the active subset of geo-fences and the inactive subset of geo-fences to produce a new active subset of geo-fences and a new inactive subset of geo-fences.
Abstract:
In one embodiment, a technique is provided for building a reference database used to estimate a position of a wireless local area network (WLAN) enabled device. Samples are obtained for WLAN access points, the samples for each WLAN access point being based on WLAN signals transmitted by the WLAN access point and received by one or more scanning devices. Software of a WLAN positioning system executing on one or more computing devices estimates a position of each WLAN access point based on the samples of the WLAN access point. The software also estimates a geographical area covered by the samples of each WLAN access point and determines a quality metric of each WLAN access point based on the estimated geographical area covered by the samples of the WLAN access point. The software then builds the reference database based on the estimated position and quality metric of each WLAN access point.
Abstract:
In one embodiment, a filtering technique is provided for ensuring data quality of network address observations. A network address observation is obtained of a network address associated with a source device, the network address observation associating the network address with one or more directly observed attributes. The network address observation is filtered based on a comparison of a selected one of the one or more directly observed attributes to a predetermined criteria, and using a result of the comparison as indicative of whether the network address observation should be used for association of the network address with one or more directly observed attributes. The filtering either associates one or more indicators with the network address observation, or removes the network address observation. A network address to attribute association system executed on one or more electronic devices stores a record that maintains any network address observation that has not been removed and any indicator.
Abstract:
In one embodiment, a system determines a designated wireless device lacks a fixed geographic location, and uses the determination that the designated wireless device lacks a fixed geographic location to improve location estimates. The system determines one or more neighboring wireless devices have relationships with the designated wireless device, wherein a relationship is established when wireless signals from a neighboring wireless device and the designated wireless device are detected by a same receiver. A measure of likelihood is calculated that the designated wireless device lacks a fixed geographic location based at least in part on a number of the relationships or a duration of the relationships. Based on the measure of likelihood, the designated wireless device is excluded from being used in the wireless positioning system as a beacon for estimating the location of a client device.
Abstract:
In one embodiment, techniques are provided for efficiently selecting and distributing wireless local area network (WLAN) access point (AP) data to a mobile client device. A reference database is maintained on a network server. An expected future location of the mobile client device is determined. The expected future location represents a location different than a present location of the mobile client device, which the mobile client device is expected to visit in the future. One or more tiles are transferred from the reference database to the mobile client device for a bounded geographic region that includes the expected future location. The one or more tiles are stored on the mobile client device to be available for use in satisfying one or more subsequently received requests for estimation of location of the mobile device.
Abstract:
In one embodiment, a system determines a designated wireless device lacks a fixed geographic location, and uses the determination that the designated wireless device lacks a fixed geographic location to improve location estimates. The system determines one or more neighboring wireless devices have relationships with the designated wireless device, wherein a relationship is established when wireless signals from a neighboring wireless device and the designated wireless device are detected by a same receiver. A measure of likelihood is calculated that the designated wireless device lacks a fixed geographic location based at least in part on a number of the relationships or a duration of the relationships. Based on the measure of likelihood, the designated wireless device is excluded from being used in the wireless positioning system as a beacon for estimating the location of a client device.
Abstract:
In one embodiment, when it is determined that one or more Wi-Fi positioning system (WPS) tiles that are necessary to estimate a location of a mobile client device are not present in a WPS tile store on the mobile client device, or are present in the WPS tile store on the mobile client device but out of date, one or more new WPS tiles are requested from a remote server. Each WPS tile is a set of Wi-Fi access point data for Wi-Fi access points within a bounded geographical region. The one or more new WPS tiles are received from the remote server, and are cached in the WPS tile store on the mobile client device. Subsequent to the caching, one or more further locations of the mobile client device are estimated autonomously from the remote server, utilizing Wi-Fi access point data in the WPS tile store.
Abstract:
Systems for and methods of determining likelihood of relocation of reference points in a positioning system are disclosed. A method of determining a measure of likelihood that an estimated geographic location of a designated wireless device is not its accurate present location includes determining a set of reference points associated with the device, which are a geographic position at which signals from the device were detected and/or other devices having a relationship with the designated device. The existence of the relationship is based on the devices being within signal reception range of a same position within a selected period of time. The method includes retrieving attributes of the reference points and/or of the relationships and determining a measure of likelihood that an estimated geographic location associated with the designated device is not its present location based on the attributes of the reference points of the set and/or of the relationships.