Adaptive Receive Diversity during Discontinuous Reception in Mobile Wireless Device

摘要

A mobile wireless device adapts receive diversity during discontinuous reception based on downlink signal quality, page indicators and page messages. When the downlink signal quality exceeds a pre-determined threshold, the mobile wireless device decodes a page indicator channel through an initial antenna, and otherwise, decodes a paging channel through the initial antenna without decoding the page indicator channel. The mobile wireless device switches to decoding the paging channel through an alternate antenna when a page indicator decodes as an erasure. When a paging message received through a single antenna decodes with an incorrect error checking code, the mobile wireless devices enables receive diversity through multiple antennas for subsequent decoding. The mobile wireless device switches between single antenna reception and multiple antenna reception based on tracking multiple consecutive error checking code failures and successes.

主权项

1. A mobile wireless device in communication with a wireless network, comprising:
a first receiver and a second receiver interconnected with a first antenna and a second antenna through a switch; and a processor configured to, during a discontinuous reception cycle in the mobile wireless device:
decode at least one page indicator received on a page indicator channel through the first antenna when a measured downlink signal quality exceeds a pre-determined threshold;decode one or more page messages received on a paging channel through the first antenna without decoding the page indicator channel when the measured downlink signal quality does not exceed the pre-determined threshold;where the paging channel and the page indicator channel are separate;decode one or more page messages received on the paging channel through the second antenna when a first page indicator received on the page indicator channel through the first antenna decodes as an erasure value, where the erasure value indicates that an unequivocal value is not present; anddecode one or more page messages received on the paging channel through the first antenna and through the second antenna together and ignoring the page indicator channel when no paging message received on the paging channel through the first antenna or through the second antenna alone decodes with a correct error checking code for a pre-determined period of time during the discontinuous reception cycle.