Patent ID: 8509102

Claim:
A method in a wireless communication terminal, the method comprising: receiving a Positioning Reference Signal (PRS) transmission from a serving cell and a PRS from a neighbor cell; estimating a signal quality metric (SQM) based on the PRS of the neighbor cell; estimating a time difference of arrival (TDOA) measurement for the neighbor cell based on the PRS of the neighbor cell; determining if the estimated SQM satisfies a first criterion threshold T_X 1 <=SQM<=threshold T_X 2 , wherein at least one of the thresholds T_X 1 or T_X 2 is based at least in part on a signal received from the serving cell; sending a report to the serving cell that includes the estimated TDOA if the first criterion is satisfied; determining at least one of T_X 1 and T_X 2 based on a serving cell signal power received at the wireless communication terminal; determining whether a strength of a signal received from the serving cell satisfies a second criterion: threshold T_Y 1 <=SCSS<=threshold T_Y 2 ; and sending the report to the serving cell only if the first and second criteria are satisfied.