Patent ID: 6167260
Filing Date: 2000-12-26
Classification: H04W

Abstract:
A method of operating a radiotelephone to perform an on demand channel change in a cellular system including at least one central device, the radiotelephone including a transceiver, a manually actuated user input and a controller, the method comprising the steps of:generating a channel change request responsive to actuation of the manually actuated user input during an active call;controlling the transceiver to transmit a channel change request to the central device responsive to the channel change request;changing to a new channel identified by the central device if a first reply signal is received from the central device;controlling the user interface to generate a display signal for a user confirming that a channel change is not available if a second reply signal is received from the central device; andperforming a channel scan if a channel scan request signal is received from the central device, wherein the step of performing a channel scan includes scanning a list of channels received from the central device and said step of scanning includes scanning those channels in the list.