Patent ID: 8654010

Claim:
A server which is external to a radio access network, the server comprising: a signaling interface through which the server is adapted to receive, from a wireless terminal of the radio access network and without invoking any radio access network protocol: a first report comprising at least two information elements determined at a known universal clock time, the at least two information elements comprising: a wireless terminal position; and a location certain time of arrival measurement for a downlink radio frame received by the wireless terminal from a node associated with a cell of a radio access network; a second report comprising: a location uncertain time of arrival measurement for a subsequent downlink radio frame received by the wireless terminal; a timer value indicative of time elapsed since determination of the known universal clock time; a controller configured to: estimate an estimated time of transmission of the subsequent downlink radio frame; determine a current radio travel time as a difference between the estimated time of transmission of the subsequent downlink radio frame and the location uncertain time of arrival measurement of the subsequent downlink radio frame; estimate a distance between the node and the wireless terminal using the current radio travel time and a geographical position of the node; use the timer value to estimate a clock drift error of the wireless terminal; use the distance between the node and the wireless terminal generate an ellipsoid arc for describing a range of possible geographical positions of the wireless terminal and use the timer value generating a thickness dimension of the ellipsoid arc.