Abstract:
Systems, apparatus and methods disclosed herein facilitate mobile station (MS) location determination using MS captured images of known points of interest (POIs). In some embodiments, each POI is associated with a corresponding visibility map comprising a set of grid points, and a subset of the POIs may be identified from the MS captured images by matching the MS captured images of each POI in the subset with corresponding stored images. A cumulative grid point weight for a plurality of grid points in the visibility maps associated with the POIs in the subset may be computed. The cumulative grid point weight for each grid point represents the probability that the MS is located at that grid point. The location of the MS may be estimated based on the cumulative grid point weights of the plurality of grid points.
Abstract:
The subject matter disclosed herein relates to systems, methods, apparatuses, articles, etc. for mobile device locating in conjunction with localized environments. For certain example implementations, a method may comprise obtaining at a mobile device one or more signals comprising information indicative of a location thereof. The information may be transmitted to one or more servers. A location context identifier (LCI) may be received responsive to the transmitting, with the LCI corresponding to a localized environment at which the mobile device is located. The LCI may be transmitted to the one or more servers. Location-based data may be received responsive to the transmitting of the LCI, with the location-based data being associated with the LCI and pertaining to the localized environment. The location of the mobile device may be determined with respect to the localized environment based, at least in part, on the location-based data. Other example implementations are described herein.
Abstract:
Systems, apparatus and methods for estimating a location of a mobile device are presented. Before computing a location estimate, the mobile device groups a plurality of access points into two or more categories (for example, a first list of access points having a first characteristic and a second list of access points having a second characteristic). Round-trip time (RTT) measurements are computed for access points in the first list. A Short Interframe Space (SIFS) value may be determined for each access point in the first list or generally SIFT representing the first list as a whole. The RTT measurements are compensated with the appropriate SIFS value. The mobile device then computes its location or position fix estimate using the compensated RTT values while excluding less accurate RTT values from other access points. As a result, the location estimate eliminates adverse influent from some access points.
Abstract:
Techniques are provided in which a mobile station may determine a first round-trip time (RTT) for a first measurement related communication between the transceiver and a first network device, wherein the first RTT comprises a uniform delay of time applied during the first measurement related communication by the first network device; Determine a second RTT for a second measurement related communication between the transceiver and a second network device, wherein the second RTT comprises the uniform delay of time applied during the second measurement related communication by the second network device; and determine, at least in part, a position of the mobile station with regard to at least the first and second network devices based, at least in part, on the first RTT and the second RTT.
Abstract:
An example method for determining a processing time for wirelessly determining a position of a mobile station includes: measuring a round trip time delay to each of multiple wireless access points; estimating an initial processing time for each of the wireless access points; calculating the position of the mobile station based upon the measured round trip time delays and estimated processing times; and updating the initial processing time for each of the wireless access points based upon the calculated position of the mobile station.
Abstract:
Systems and methods are provided herein for assistance data generation based on raster images, such as raster images of floor plans. A method provided herein for generating positioning assistance data includes obtaining a first raster image including a floor plan of an area; obtaining geographic reference information corresponding to the area, the geographic reference information including a location of the area; extracting structural features of the area from the floor plan of the area via the first raster image; and generating assistance data for the area based on the extracted structural features and the geographic reference information.
Abstract:
Techniques for determining a position of a mobile device in an indoor environment are provided. An example method includes receiving a request for the position of the mobile device within the indoor environment from an application running on the mobile device, estimating the position of the mobile device within the indoor environment based on signals received from a plurality of wireless access points responsive to receiving the request for the position of the mobile device, identifying an ambiguity in estimating the position of the mobile device, identifying disambiguation information for resolving the ambiguity in the position, requesting disambiguation information for resolving the ambiguity associated with the position, receiving the disambiguation information for resolving the ambiguity associated with the position; resolving the ambiguity in estimating the position using the disambiguation information; and determining the position of the mobile device in the indoor environment.
Abstract:
Disclosed are systems, apparatus, devices, methods, computer program products, computer media, and other implementations, including a method that includes communicating data representative of one or more location-based restrictions corresponding to a venue area to a mobile device determined to be located within the venue area, and controlling, by at least one venue server, use at the mobile device of services available at the venue area from one or more nodes associated with the venue area based, at least in part, on a determination, by the at least one venue server, of whether the mobile device complies with the location-based restrictions corresponding to the venue area.
Abstract:
In one implementation, a method may comprise: determining a topological representation of an indoor portion of a building based, at least in part, on positions or number of lines in an image of the indoor portion of the building; and comparing the topological representation to one or more stored topological representations, for example in a digital map of the building, to determine a potential position of the indoor portion of the building.
Abstract:
Disclosed are systems, methods and techniques for obtaining round trip time (RTT) measurements from acquisition of signals at one or more mobile devices, the signals being transmitted by one or more transmitters; approximating locations of the one or more mobile devices while obtaining the RTT measurements; and combining the measurements to determine expected RTT signature values at discrete positions in the area based, at least in part, on the obtained RTT measurements and the approximated locations.