Method for determining position by obtaining directional information from spatial division multiple access (SDMA)-equipped and non-SDMA-equipped base stations
Positioning system and method
Method and system for position determination using video dial tone
Prediction system for RF power distribution
Positioning system having an RF-measurements databank
Indoor radio frequency coverage tool
Method for predicting the location of a mobile station in a mobile communications network
Differential GPS landing system
Communication network control method and apparatus Patent #: 6084955
ApplicationNo. 321729 filed on 05/28/1999
US Classes:455/456.3, Position based personal service342/357.02With accuracy enhancing
ExaminersPrimary: Urban, Edward F.
Assistant: Jackson, Blane J.
Attorney, Agent or Firm
International ClassH04Q 007/20
AbstractThe location of a mobile unit in the service area of a CDMA wireless communications system is determined by a location probability distribution procedure that is based entirely on analytical results derived from an integrated model of the wireless communications system, its RF environment and attribute measurement. The mobile unit measures and reports attribute values of pilot signal strength of all pilot signals visible to the mobile unit at its present location, whereupon a location probability distribution is computed based on a Bayesian probability algorithm including a set of stored model parameters.