Patent Number: 6,434,376

Title: Slotted idle mode for dual mode subscriber stations

Abstract: A system and method for reducing average idle current in a telecommunications system handset by decreasing the power when demodulation of the incoming signal and decoding of FOCC data stream is unnecessary is provided. The system and method supplant the need to decode all five repeated FOCC data words. The system performs various testing on each of the five data words as they are received. If the data words satisfy particular conditions, such as comprising control filler words or match one another based on the result of testing, no further processing of words occurs until the next sync is received and sleep mode is initiated. According to a further feature, the system may erase the sync/dotting sequence if and only if the prior sync word is successfully decoded. The system and method support both A and B slotting and power down components of the handset, such as RF circuitry and/or data sync timers.

Inventors: Black; Peter J. (La Jolla, CA)

Assignee: Qualcomm, Inc.

International Classification: H04B 1/16 (20060101); H04Q 7/32 (20060101); H04B 001/16 ()

Expiration Date: 08/13/2019