Wireless device battery conservation method and system

Abstract

In general, the invention provides a method for detecing a bad RF state, and saving battery power by entering different sleep mode levels or stages according to the RF state. When a mobile device detects the bad RF state and enters a deep sleep opertion mode, the life time of the battery of the mobile device can be kept. In the deep sleep opertion mode, the mobile device periodically samples the RF state, when the RF state is not improved, time intervals between samples are gradually increased. Because even in a good RF coverage region, the movability can changes the RF state of a wireless device, the mobile device operated in the deep sleep mode is able to detect the movability and increase the possibility of entering an idle state, or slectively, entering a longer power saving mode. When the RF state is improved, the mobile device exits from the deep sleep mode, and returns the idle state.

Description

technical field [0001] The present invention generally relates to mobile wireless communication devices. More specifically, the present invention relates to a method and system for improving battery life of wireless communication devices in poor coverage areas. [0002] Background technique [0003] In CDMA mobile devices, there are mechanisms to conserve battery power when operating in areas with good coverage and in areas without coverage. In areas with good coverage, or in areas where relatively strong RF signals are present, the mobile device battery power is conserved by entering sleep mode using the slot cycle index, while the mobile device is idle, as described in the CDMA standard . Slot cycle indexing is well known to those skilled in the art and will be discussed briefly below. In areas of no coverage, the mobile device can enter a deep sleep cycle during which the mobile device can occasionally "wake up" to check for the presence of RF signals. [0004] Before...

AI Technical Summary

Problems solved by technology

However, due to the same state (where the original signal was lost), the new reacquired signal can be lost again, and the mobile device continues to repeat the reacquisition process until the RF state is improved so that the paging channel is not lost , or the mobile device becomes unusable due to excessive battery drain

Therefore, the periodic nature of the slot cycle index and the power savings it provides cannot be maintained

As a result, mobile devices spend most of their time in active mode rather than sleep mode, where precious battery life is consumed due to frequent acquisition and loss of paging channels

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