Patent ID: 8738042

Claim:
A method for determining a closest base station to a multi-mode mobile device, the method comprising: determining a plurality of propagation delays with respect to a common reference time between the multi-mode mobile device and each of a first plurality of base stations, wherein each of the first plurality of base stations is associated with a different wireless communications technology from a plurality of wireless communications technologies, wherein determining the propagation delays comprises: determining a plurality of event markers, each of the plurality of event markers representing an event associated with a transmission from a base station of the first plurality of base stations; determining a plurality of receive times and a plurality of transmission times associated with the event markers; and determining the propagation delays based on the receive times and the transmission times; comparing the plurality of propagation delays between the multi-mode mobile device and the first plurality of base stations associated with the different wireless communications technologies; and identifying a closest base station to the multi-mode mobile device from the first plurality of base stations based on the comparison.