Patent ID: 8078132

Claim:
A method of selectively skipping one or more listen windows during sleep mode in a multi-mode radio handset capable of operating on a plurality of radio access networks (RANs) comprising: determining whether a remaining length of a sleep window is adequate to complete a scan of the plurality of RANs; in response to determining the remaining length of the sleep window is not adequate to complete the scan, signaling a serving base station to which the multi-mode radio handset is currently in communication to request that one or more listen windows be skipped wherein the request includes data defining an altered listen and sleep window sequence; receiving an acknowledgment from the serving base station indicating that the request has been granted wherein the acknowledgement includes a start frame parameter that defines when the altered listen and sleep window sequence will begin; and reverting back to the original alternating sequence of listen and sleep windows upon completion of the altered listen and sleep window sequence.