Patent ID: 7043242

Claim:
A method of avoiding adjacent channel interference and reducing disconnections caused thereby, during communication between a mobile device ( 102 ) and a base station ( 202 ) that communicate via a communication channel in a wireless communication network, comprising the steps of: measuring ( 302 ) received power of a received signal at a point before the received signal is filtered by at least one selected filter within the mobile device ( 102 ), for providing a received power measurement signal having a magnitude indicative thereof, filtering ( 304 ) the received signal, for providing a filtered signal, remeasuring ( 306 ) post-filter power of the filtered signal, for providing a filtered power measurement signal having a magnitude indicative thereof, estimating ( 308 ) from the received power measurement signal and the filtered power measurement signal a power ratio having a magnitude indicative of a degree to which the adjacent channel interference exceeds communication channel power, and requesting ( 314 ) a handover to an alternative communication channel available for data transmission to and from the mobile device via said alternative communication channel, if ( 310 ) said power ratio is greater than a certain threshold, wherein the steps of measuring ( 302 ), filtering ( 304 ), remeasuring ( 306 ), and estimating ( 308 ) are performed while the mobile device is capable of using the communication channel for receiving and transmitting data, wherein both the communication channel and the alternative communication channel are for communication between the mobile device ( 102 ) and the base station ( 202 ); and wherein the power ratio is substantially determined by adjacent channel power divided by communication channel power, the communication channel power being substantially given by the magnitude of the filtered signal, and the adjacent channel power being calculated as a function of both the magnitude of the filtered signal and the magnitude of the received signal.