Patent ID: 6205334
Filing Date: 2001-03-20
Classification: H03J,H04W

Abstract:
A method for identifying a control channel in a cellular radiotelephone, from among a plurality of candidate control channels that are transmitted by a cellular radiotelephone network, the control channel identifying method comprising the steps of:providing initial probability indications for each of the plurality of candidate control channels, that indicate a probability that the associated control channel includes a predetermined type of control channel signal, before the plurality of candidate control channels are received;tuning the cellular radiotelephone to a selected one of the candidate control channels;receiving a signal on the selected one of the candidate control channels;updating the initial probability indication for the selected one of the candidate control channels based upon the received signal to provide an updated probability indication for the selected one of the candidate control channels;performing the steps of tuning, receiving and updating for remaining ones of the candidate control channels until one of the updated probability indications for a corresponding one of the candidate control channels exceeds a threshold;attempting to decode the corresponding one of the candidate control channels; andif the corresponding one of the candidate control channels is successfully decoded, further updating the initial probability indication for the successfully decoded candidate control channel.