Patent ID: 7623861
Filing Date: 2009-11-24
Classification: H04W,Y02D

Abstract:
1. A method for operating a wireless mobile station, comprising: operating in an idle mode including wakeup cycles and sleep cycles, wherein each of the wakeup cycles includes an on-frequency searching time period and an off-frequency searching time period, wherein the wireless mobile telephone has a first power requirement during the wakeup cycles and has a second power requirement less than the first power requirement during the sleep cycles, wherein the wireless mobile telephone is adapted to enable a receiving function during the wakeup cycles and to disable the receiving function during the sleep cycles, and wherein the wireless mobile telephone is adapted to disable a transmitting function during the idle mode and to enable the transmitting function when not in the idle mode; transitioning from a sleep cycle in the idle mode to a wakeup cycle in the idle mode; determining whether an off-frequency searching condition is satisfied during the wakeup cycle, the off-frequency searching condition being satisfied when a maximum signal-to-noise ratio for one or more base stations in an active set of the wireless mobile telephone is less than a prescribed level and there are no on-frequency base stations included in a candidate set of the wireless mobile telephone; performing off-frequency pilot signal searching during the off-frequency searching time period in the wakeup cycle upon at least one other frequency for at least one neighboring base station not in the active set for the wireless mobile telephone when the off-frequency searching condition is satisfied; performing on-frequency pilot signal searching during the on-frequency searching time period in the wakeup cycle upon at least one frequency for at least one base station in the active set for the wireless mobile telephone when the off-frequency searching condition is satisfied or not satisfied, wherein the performing the on-frequency pilot signal searching occurs before or after the performing of the off-frequency pilot signal searching when the off-frequency searching condition is satisfied; and transitioning from the wakeup cycle to the sleep cycle if additional communication is not required.