Patent ID: 8055272
Filing Date: 2011-11-08
Classification: H04W

Abstract:
1. A method of adjusting processing duration in a position-determining system, wherein the position-determining system applies a primary mechanism to determine a position and, if the primary mechanism fails to determine the position, then applies a secondary mechanism to determine the position, the method comprising: receiving into the position-determining system a request to determine the position, the request including a designation of total allowed processing duration for determining the position, wherein the request comprises a Geo Position Request (GPOSREQ) from a mobile positioning center (MPC); responsively computing a primary allowed processing duration as a difference between (i) the designated total allowed processing duration and (ii) a predefined value representing an expected duration for successfully applying the secondary mechanism to determine the position; detecting that the computed primary allowed processing duration has passed while applying the primary mechanism without yet successfully determining the position, and responsively transitioning to apply the secondary mechanism in an effort to determine the position; and outputting to the MPC a GPOSREQ return result (gposreq_rr) that designates the position determined by the secondary mechanism.