Patent ID: 8251819

Claim:
A method performed by a first device operating in an interactive augmented reality game environment with a second device, the method comprising: constructing in the first device a virtual world coordinate system of the interactive augmented reality game environment, the virtual world coordinate system based on an initial position and orientation of the first device in a real world coordinate system obtained from sensors in the first device and an initial position and orientation of the second device in the real world coordinate system obtained from sensors in the second device and received in a communication from the second device to the first device, the initial position and orientation of the first device and the initial position and orientation of the second device each obtained while users of the first device and the second device perform a first game convention with each other; displaying on a display of the first device any first device actions and any second device actions occurring within a field of view of the display of the first device, the first device actions based on any user input information of the first device and a new position and orientation of the first device in the real world coordinate system obtained from sensors in the first device, the second device actions based on any user input information of the second device and a new position and orientation of the second device in the real world coordinate system obtained from sensors in the second device and received in a communication from the second device to the first device; and directing the user of the first device to perform a second game convention if a sensor error of the first device or a sensor error of the second device exceeds a predefined limit.