Patent ID: 8320938

Claim:
A method for localizing terminal devices, comprising: determining ambient information by means of the terminal device; determining a position of the terminal device based on the ambient information; determining a deviation of the ambient information from reference ambient information allocated with the position of the terminal device; and undertaking an updating measure when a deviation is determined, the method further comprising managing reference ambient information of surroundings of a terminal device, comprising: receiving update information of the surroundings of the terminal device; assessing a reliability of the update information; changing the reference ambient information of the surroundings of the terminal device when a reliability criterion is fulfilled when assessing the reliability, wherein assessing the reliability of the update information comprises assessing a value of trust of the terminal device, and wherein a value of trust signalizes a high trustworthiness when update information of the terminal device were correct in the past, or wherein the value of trust signalizes a high trustworthiness when an accuracy of the position determination of the terminal device is improved when considering the update information.