Patent application number | Description | Published |
20090073030 | Transfer of position information of mobile terminal - The invention provides a method of combining satellite positioning system signals and position information derived from such signals in a mobile terminal, when these are available at a first location, with cellular communication signals and a method, system and apparatus for determining the approximate position information for the said mobile terminal when SPS signals are not available at a second location. The approximate position is determined in the mobile terminal only using a position difference vector derived from the cellular communication signals using time offsets in a method based on the observed time difference of arrival. The computations of cellular position and position difference information are made within the network infrastructure. The invention provides for the security of the user as only position difference information is communicated over the air interface, or transmission time offset measurements which require non-transmitted information to determine a solution. In a further aspect of the invention, the approximate position information is used to provide position assistance information to an SPS receiver for the purposes of (a) satellite signal acquisition with reduced search time and/or (b) initial position information for the calculation of SPS location which thereby avoids the ‘integer ambiguity’ problem resulting from the repetitive nature of the SPS ranging signals. In a further aspect of the invention, a method is disclosed whereby a plurality of cellular positioning measurements are combined, initially with SPS measurements and then without such measurements, to provide a combined cellular position information with improved accuracy and a dynamic model. | 03-19-2009 |
20090111482 | Method and Apparatus for Determining Whether a Mobile Terminal Has Moved Outside a Given Locale - A method and apparatus are described for determining whether a mobile terminal | 04-30-2009 |
20090160703 | Assistance to a mobile sps receiver - A method is described, for use with an SPS mobile terminal receiver | 06-25-2009 |
20090281729 | Integrated Mobile Terminal Navigation - A navigation system is described which includes a mobile terminal | 11-12-2009 |
20100234048 | DETERMINING THE CHANGE IN TIME AT A MOBILE TERMINAL - In a terminal | 09-16-2010 |
20100295727 | PROCESSING RECEIVED SATELLITE RADIO SIGNALS - A method of processing received satellite radio signals is disclosed in which signals are received the signals from plural satellites through a common antenna. The received signals are digitised to produce a time-series of digitised signal samples and a plurality of replicas representing the signals of each of the plurality of satellites are obtained. At least one sample is selected from each of the replicas and the elements of a register are set equal to the selected replica samples. Thereafter, in turn, for each one of said digitised signal samples, the value of the digitised signal sample is combined with each of the values of the elements of the register to produce corresponding modified values; and the modified values corresponding to each of said register elements are accumulated. | 11-25-2010 |
20110043406 | FINDING THE POSITION OF A MOBILE TERMINAL - A method and apparatus are disclosed for determining the position, or change in the position, of a mobile terminal. The terminal has a receiver for receiving the signals from one or more transmission sources at unknown positions and an independent positioning device able to find, when operative, the position of the mobile terminal. The method uses the independent positioning device to measure the position of the mobile terminal at one or more first locations. A respective first set of time or phase offset values of signals received from the transmission sources relative to each other or to a reference in the mobile terminal is measured in the mobile terminal, at each first location. A second set of time or phase offset values are measured in the mobile terminal at a second terminal location where the independent positioning device is not operative and a second set of time or phase offset values of the signals received from the transmission sources, relative to each other or to a reference in the mobile terminal is measured. The values and said first measured terminal position or positions are combined, to thereby calculate the position of the mobile terminal at the second location, or the change in position of the mobile terminal between a first location and the second location. | 02-24-2011 |
20110187595 | TRANSFER OF CALIBRATED TIME INFORMATION IN A MOBILE TERMINAL - A method of and system for calibrating un-calibrated time information within a mobile terminal | 08-04-2011 |