Abstract:
PROBLEM TO BE SOLVED: To provide a method and system which assists a mobile station to locate a satellite.SOLUTION: A system 100 comprises a location assistance server 130, a data provider 150, a data provider 110, and a data host 160. The location assistance server 130 receives a real-time orbit from the data provider 150 via a network 164, and receives a predicted orbit from the data provider 110 via a network 162. The server 130 generates correction data 140 from the real-time orbit and the predicted orbit. The correction data 140 is transmitted directly to a mobile station 120 from the data host 160 via a network 166.
Abstract:
PROBLEM TO BE SOLVED: To reduce datalink requirements for a method and a system in which a network location specification server specifies a location of a mobile station is specified.SOLUTION: Data link requirements are reduced by two methods. A method 1 includes: (i) a step 132 for acquiring a raw measurement value; (ii) a step 134 for updating estimation based on the raw measurement value and a previous raw measurement value and/or combination of estimation; (iii) and a step 136 for transmitting the updated estimation to a location specification server. A method 2 includes: (i) a step for acquiring a raw measurement value from a plurality of signals at various time instances; (ii) a step for updating estimation based on the raw measurement value; (iii) a step for performing extrapolation at a certain common time instance; (iiii) and a step for transmitting the extrapolation to the location specification server.
Abstract:
PROBLEM TO BE SOLVED: To a method and apparatus for setting boundaries and marking the positions of obstacles associated with the boundaries for such applications for applications to activities which are played outdoors, for example, a soccer game played within a boundary of the soccer field.SOLUTION: A wireless communications device with positioning capabilities is used to mark the boundary of a virtual operations area, and used to mark one or more obstacles within the boundary. Virtual operations may be conducted by users having a wireless communications device, and the wireless communications device generates an alert when a user violates the boundary or is within a preset proximity to an obstacle.
Abstract:
PROBLEM TO BE SOLVED: To provide a method for supporting a mobile station to find a position of a satellite by using an effective message format including extended SPS (satellite positioning system) orbit correction information.SOLUTION: A server calculates correction between rough orbit data of the satellite and accurate orbit data of the satellite. A coordinate system is selected so that a change of correction is sharply smoothed with time. The server further calculates the correction roughly by using a mathematical function in order to reduce the number of bits necessary for transmission to the mobile station. When receiving a coefficient, the mobile station evaluates the mathematical function by using the coefficient and application time (e.g. present time), converts the evaluated result into a standard coordinate system and applies the converted result to the rough orbit data to acquire the accurate orbit data.
Abstract:
PROBLEM TO BE SOLVED: To solve the problem that location information obtained by a receiver from an external source may not always be reliable.SOLUTION: A position determining system (PDS) receiver collects location information independent from a plurality of sources. The plurality of sources is analyzed to determine consistency of a location. If the location is consistent among the various independently collected location information, the location information is injected into a PDS positioning process for more efficient acquisition and positioning. Otherwise, if inconsistency is found, no location information is injected into the PDS positioning process.
Abstract:
PROBLEM TO BE SOLVED: To reduce the frequency of necessary almanac and/or ephemeris download directly from a satellite or from a location assistance server. SOLUTION: A server computes correction between coarse orbit data of a satellite and precise orbit data of the satellite. A coordinate system is selected so that a variation of the correction is substantially smooth over a time. The server further approximates the correction with a mathematical function to reduce the number of bits necessary for transmission to a mobile station. Upon receiving the coefficients, the mobile station evaluates the mathematical function using coefficient and a time of applicability (e.g., the current time), converts the evaluated result to a standard coordinate system, and applies the conversion result to the coarse orbit data to obtain the precise orbit data. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
A method and system for assisting mobile stations to locate a satellite use an efficient messaging format. A server computes a correction between coarse orbit data of a satellite and precise orbit data of the satellite. A coordinate system is chosen such that variation of the correction is substantially smooth over time. The server further approximates the correction with mathematical functions to reduce the number of bits necessary for transmission to a mobile station. The mobile station, upon receiving the coefficients, evaluates the mathematical functions using the coefficients and a time of applicability (e.g., the current time), converts the evaluated result to a standard coordinate system, and applies the conversion result to the coarse orbit data to obtain the precise orbit data.
Abstract:
A mobile device comprises one or more processors, a display, and a camera configured to capture an image of a live scene. The one or more processors are configured to determine a location of the mobile device and display an augmented image based on the captured image. The augmented image includes at least a portion of the image of the live scene and a map including an indication of the determined location of the mobile device. The one or more processors are also configured to display the at least a portion of the image of the live scene in a first portion of the display and displaying the map in a second portion of the display. The augmented image is updated as the mobile device is moved, and the map is docked to the second portion of the display as the augmented image is updated.
Abstract:
A method and system for a mobile station to determine its position (or velocity) and time using a hybrid combination of satellite orbit data. In one aspect, the mobile station combines predicted orbit data from one satellite and real-time orbit data from another satellite in the determination of a fix. The combination can be made to the satellites in the same or different satellite systems. The mobile station can use the real-time orbit data of a satellite at one time period and the predicted orbit data of the same satellite at another time period. In another aspect, the mobile station can use the real-time orbit data to correct the clock bias in the predicted orbit data. The correction to the clock bias can be made to the same satellite that provides the real-time orbit data, or to a different satellite in the same or in another satellite system.