Patent ID: 6788253
Filing Date: 2004-09-07
Classification: G01S,H04L

Abstract:
A method for use in a geo-location system of a mobile wireless communication network, the network including at least one mobile wireless terminal and at least one base station, the mobile wireless terminal having at least one transceiver capable of operating in a first operational system and an at least second operational system, said operational systems including pilot signals transmitted along with signals transmitted in the first and at least second operational systems by said at least one base station, the method comprising the steps of:measuring a first interference level in said first operational system; comparing said measured first interference level to a first threshold level; if said first measured interference level is equal to or less than said measured first threshold level, performing a geo-location process in said first operational system to obtain a location of said at least one mobile wireless terminal; if said measured first interference level is greater than said first threshold level, switching in accordance with first prescribed criteria to said at least second operational system; measuring a second interference level in said at least second operational system; comparing said measured second interference level to a second threshold level; if said measured second interference level is equal to or greater than said second threshold level, reducing said interference level utilizing second prescribed criteria until said measured second interference level is less than said second threshold level; and performing said geo-location process in said second operational system to obtain a location of said at least one mobile wireless terminal.