Abstract: Systems and methods for estimating the minimum geographic coverage of a wireless base station. In an embodiment, the present invention estimates coverage by (1) receiving real-time wireless base station information from the mobile device; (2) extracting a set of location points and system specific information based on the real-time wireless base station information; (3) determining a coverage area based on the set of location points and the system specific information; (4) adjusting for errors based on various factors (5) storing the determined coverage area.

Abstract: A wireless base station allows a mobile device to communicate with a wireless network. An estimate of the location of the wireless base station may allow a location based service to determine the location of a mobile device. In an embodiment, location may be estimated using a collection of data samples obtained from a mobile device. These data samples may contain carrier related timing information, for example GSM (Global System for Mobile Communications) timing information and received signal strength indication (RSSI). Data from the GSM timing information and RSSI may be analyzed to estimate a distance of a mobile device from a wireless base station. In another embodiment, a centroid of the data samples is computed. The centroid may then be used to estimate the direction of a cell phone tower relative to the centroid. In this way, using an estimate of distance and direction, location of wireless base station may be estimated.

Abstract: A method and system for accuracy analysis of wireless base station location is provided. In one embodiment, data from a set of mobile devices using a wireless base station is collected. A location of a wireless base station is estimated based on locations of the mobile devices (i.e. points) in the collected set. To provide a more accurate location estimation for the wireless base station, the estimated location is analyzed for accuracy based on the collected data. A confidence score is calculated using a weight function with weights for the collected data based on factors, such as, collection size, platform types of the mobile devices, quality, temporal diversity and/or spatial diversity of points corresponding to the mobile devices, etc. An estimated location of the wireless base station may be adjusted based on the calculated confidence score. An estimated coverage region of the wireless base station may be also estimated and adjusted.

Abstract: In general, the subject matter described in this specification can be embodied in methods, systems, and program products. Data representing a plurality of power management profiles for a battery-operated wireless computing device are stored on the device. The power management profiles correspond to different power consumption levels. Each power management profile defines a feature for determining a geographic location of the device from among a plurality of features that are available for determining the geographic location of the device, and a frequency for employing the feature to determine the geographic location of the device. A first battery level of the device is determined. If the determined battery level is lower than a first predetermined amount, the device switches from a first power management profile having a first consumption level to a second power management profile having a second consumption level that is lower than the first consumption level.

Abstract: In general, the subject matter described in this specification can be embodied in methods, systems, and program products. Data representing a plurality of power management profiles for a battery-operated wireless computing device are stored on the device. The power management profiles correspond to different power consumption levels. Each power management profile defines a feature for determining a geographic location of the device from among a plurality of features that are available for determining the geographic location of the device, and a frequency for employing the feature to determine the geographic location of the device. A first battery level of the device is determined. If the determined battery level is lower than a first predetermined amount, the device switches from a first power management profile having a first consumption level to a second power management profile having a second consumption level that is lower than the first consumption level.

Abstract: An immersed metallurgical pouring nozzle, such as a submerged entry nozzle for pouring molten steel, comprises a body of refractory material, such as graphite alumina, which defines a flow passage. An annular member of refractory material, such as zirconia with a very low or no-content of carbon, whose erosion resistance is higher than that of the body of the nozzle is wholly encapsulated in the material of the body of the nozzle.