Abstract: A position location system, apparatus and method are disclosed. A coordinating device identifies a group of wireless devices for position location processing. The number of wireless devices in the group may vary according to the number of coordinates used to define a position within the system. The coordinating device obtains range measurements from which a distance between each pair of wireless devices in the group can be determined. In addition, the coordinating device acquires the known position of one wireless device in the group. Using this information, a position is determined for one or more devices in the group for which position data is not available. Optionally, the position data is validated by the coordinating device or another wireless device in the system and a final position is returned to the one or more wireless devices.