Patent ID: 8447319

Claim:
A method for estimating a location of a wireless device receiving signals from a plurality of nodes of a communication system, the method comprising: (a) determining a first value based on a network timing characteristic for one of said nodes; (b) determining a second value based on a network measurement report characteristic; (c) calculating an observed time difference of arrival (“OTDOA”) hyperbola based on said first and second values; and (d) estimating a location of said wireless device as a function of said OTDOA hyperbola, wherein said plural nodes include a serving node and a neighboring node and wherein the calculating of the OTDOA includes using a second value determined from a difference between a connection frame number (“CFN”) of said serving node and a system frame number (“SFN”) of said neighboring node, and wherein the estimating of the location of said wireless device includes determining a third value selected from the group consisting of: a round trip time (“RTT”) value, a cell identification value, a signal strength value, and combinations thereof.