Invention Application
- Patent Title: UTILIZING DC NULLS IN TRANSMISSION OF LOW POWER WAKE-UP PACKETS
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Application No.: US15277740Application Date: 2016-09-27
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Publication No.: US20180091344A1Publication Date: 2018-03-29
- Inventor: Shahrnaz AZIZI , Thomas J. KENNEY , Minyoung PARK , Juan FANG
- Applicant: INTEL CORPORATION
- Main IPC: H04L27/26
- IPC: H04L27/26 ; H04W52/02

Abstract:
Techniques have been proposed to transmit a wake-up packet at the central 26-tone resource unit of the IEEE 802.11ax OFDMA structure with a low-power wake-up radio packet within the OFDMA allocation. Prior techniques proposed to multiplex transmission of the wake-up packet with IEEE 802.11ax OFDMA PPDUs; leaving the RUs adjacent to the central 26-tone unassigned to function as guard bands. These guard bands are needed to reduce the impact of the adjacent channel interference on the LP-WUR. One embodiment transmits the 26×20 MHz/256=2.03125 MHz wake-up pulse at the center of (or in general anywhere within) the band (e.g., RU5) without requiring the nulling of the seven DC subcarriers. This moves the wakeup pulse inward leaving larger guard bands between the wake-up packet and the adjacent OFDMA allocations. This at least improves the LP-WUR detection performance and will allow assignment of more RUs to IEEE 802.11ax OFDMA PPDUs—Thereby improving overall system throughput and efficiency.
Public/Granted literature
- US10237826B2 Utilizing DC nulls in transmission of low power wake-up packets Public/Granted day:2019-03-19
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