Patent ID: 7133685

Claim:
A method of providing location-based services for a mobile unit operating in a wireless network including a processing platform, data storage associated with the processing platform, and a plurality of cell sites; the method comprising: receiving an identifier associated with the mobile unit; receiving geographic zone boundary information; storing the geographic zone boundary information in the data storage associated with the processing platform; identifying a number of cell sites characterized by a cell site coverage area intersected by the geographic zone boundary, wherein each of the identified number of cell sites comprise a plurality of cell sectors having a cell sector coverage area and having a cell sector boundary; identifying a subset of cell sectors characterized by a cell sector coverage area intersected by the geographic zone boundary; defining a service zone region formed by the union of the subset of cell sectors; defining a service zone boundary formed by portions of the boundaries of the identified subset of cell sectors; monitoring a location of the mobile unit using the identifier and a network-assisted location finding system to identify a crossing of the service zone boundary by the mobile unit; and transmitting service information to a system user in response to the crossing of the service zone boundary.