Invention Grant
- Patent Title: Embedded wake-up signaling
- Patent Title (中): 嵌入式唤醒信号
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Application No.: US15017500Application Date: 2016-02-05
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Publication No.: US09525540B1Publication Date: 2016-12-20
- Inventor: Stephen Jay Shellhammer , Peter Pui Lok Ang , Joseph Patrick Burke , Tingfang Ji , Cong Nguyen , Joseph Binamira Soriaga
- Applicant: QUALCOMM Incorporated
- Applicant Address: US CA San Diego
- Assignee: QUALCOMM INCORPORATED
- Current Assignee: QUALCOMM INCORPORATED
- Current Assignee Address: US CA San Diego
- Agency: Haynes and Boone, LLP
- Main IPC: H04L7/00
- IPC: H04L7/00 ; H04L5/00 ; H04W40/00 ; H04L27/04 ; H04L7/04

Abstract:
When embedding a signal into a selected subcarrier of a multicarrier downlink waveform of regular data/control signaling, a base station modulates the embedded signal with a different modulation scheme than the other data in the downlink waveform. The base station nulls adjacent subcarriers to minimize interference at a low-power wake-up receiver of an IOE device(s). The IOE device wakes up the low-power wake-up receiver at scheduled times to listen for the signal. For synchronization signals, the IOE device corrects a local clock based on a correlation value of the signal to a predetermined sequence. For wake-up signals, the IOE device correlates whatever is detected at the antenna to a predetermined sequence and compares the correlation value to a predetermined threshold. If the threshold is met, the IOE device registers a wake-up signal and wakes the primary transceiver of the device. If not, the receiver goes back to sleep.
Public/Granted literature
- US20160373237A1 EMBEDDED WAKE-UP SIGNALING Public/Granted day:2016-12-22
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