Patent ID: 8818362

Claim:
A method of determining a location of a mobile device for use in a first communication network and a second communication network, and in communication with a cellular base station in the second communication network, the method comprising: the mobile device obtaining a list of records of communication units within the first or second communication network that are located within a predetermined geographical area, the communication unit records comprising information representative of the identity of each respective communication units, information representative of a position of each respective communication units, and a reliability indication of each respective communication unit; the mobile device detecting communication units within the first or second communication network; and the mobile device determining the location of the mobile device based on the information representative of the position of selected detected communication units, wherein such selection is based on the information representative of the position, the reliability indication, and an accuracy indication of the detected communication units, wherein the selection is further based on a distance between positions of the detected communication units indicated by the information representative of the position of respective communication units.