Patent ID: 6928292

Claim:
A mobile handset capable of determining its position using radio waves, the mobile handset comprising: GPS receiver means for receiving GPS-oriented signals and generating received GPS signals; GPS position calculation means for calculating the mobile handset's position from the received GPS signals and outputting a GPS-based position result; GPS reliability calculation means for calculating GPS positioning reliability based on the GPS-based position result; cellular receiver means for receiving cellular-oriented signals and generating received cellular signals; cellular position calculation means for calculating the mobile handset's position from the received cellular signals and outputting a cellular-based position result; cellular reliability calculation means for calculating cellular positioning reliability based on the cellular-based position result; and GPS/cellular positioning results combining means for combining the GPS-based position result and the cellular-based position result with the GPS positioning reliability and the cellular positioning reliability, wherein said GPS and cellular receiver means are adapted to receive GPS and cellular-oriented signals simultaneously.