System unavailablity power reduction method with early failure a

Details System unavailablity power reduction method with early failure a System unavailablity power reduction method with early failure a

1996-08-09

2000-06-06

Bost, Dwayne D.

Telecommunications

Transmitter and receiver at same station

Radiotelephone equipment detail

455434, H04B 138, H04M 100, H04Q 720

Patent

active

060730358

ABSTRACT:
The present invention includes a method and an apparatus for reducing power consumption in a wireless telephone. The wireless telephone is programmed to enter a reduced power mode for a sleep interval of time upon failing to access a base station. Additionally, the overall base station accessing process is considerably shortened by only searching once through the sequence of available carrier spectrums (e.g., digital and analog carriers for multi-mode mobile stations) before entering the reduced power mode. Also, when searching through a code division multiple access (CDMA) channel, the present invention includes searching only once through all pseudo-random number (PN) code timing locations when searching for a base station.

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