公开(公告)号：US20180092117A1

公开(公告)日：2018-03-29

申请号：US15277472

申请日：2016-09-27

Applicant: INTEL CORPORATION

Inventor： Shahrnaz AZIZI ,  Eldad PERAHIA ,  Thomas J. KENNEY

IPC: H04W72/12 ,  H04W76/04 ,  H04L5/00

CPC classification number: H04W76/27 ,  H04L5/0048 ,  H04L5/0055 ,  H04W74/006 ,  H04W84/12 ,  Y02D70/00 ,  Y02D70/10 ,  Y02D70/1224 ,  Y02D70/1242 ,  Y02D70/1244 ,  Y02D70/1246 ,  Y02D70/1262 ,  Y02D70/1264 ,  Y02D70/14 ,  Y02D70/142 ,  Y02D70/144 ,  Y02D70/146 ,  Y02D70/162 ,  Y02D70/166 ,  Y02D70/21 ,  Y02D70/26

Abstract: A new staggered trigger scheme is described herein to address and optimize deployments using a mix of narrowband (NB) data packets with existing Wi-Fi devices. The approach has the access point (AP) sending staggered wideband trigger frames prepended with a legacy preamble. This signalling method allows frequency multiplexing of low-power NB (LP-NB) devices, in addition to time and frequency multiplexing of both LP-NB and wideband devices in both the downlink (DL) and uplink (UL) direction. Furthermore, the scheme allows for the multiplexing of the new wake-up packets with future narrowband and IEEE 802.11ax data packets. Thus, with this unique staggered trigger frame proposal, LP-NB and wake-up devices unable to transmit or decode the legacy 20 MHz preamble, can share the spectrum with legacy devices with full coexistence provided.

公开(公告)号：US20180092036A1

公开(公告)日：2018-03-29

申请号：US15278489

申请日：2016-09-28

Applicant: INTEL CORPORATION

Inventor： Shahrnaz AZIZI ,  Minyoung PARK ,  Thomas J. KENNEY ,  Eldad PERAHIA ,  Ilan SUTSKOVER

IPC: H04W52/02 ,  H04W72/04

CPC classification number: H04W52/0235 ,  H04L5/0048 ,  H04L5/0064 ,  H04W12/06 ,  H04W84/12 ,  Y02D70/00 ,  Y02D70/10 ,  Y02D70/12 ,  Y02D70/1224 ,  Y02D70/1242 ,  Y02D70/1244 ,  Y02D70/1246 ,  Y02D70/126 ,  Y02D70/1262 ,  Y02D70/1264 ,  Y02D70/14 ,  Y02D70/142 ,  Y02D70/144 ,  Y02D70/146 ,  Y02D70/166 ,  Y02D70/21 ,  Y02D70/26

Abstract: Devices, methods, and media described herein can employ the central 26-tone allocation of 802.11ax for transmission of NB beacons and wake-up packets. Having a dedicated narrowband channel for transmission of NB beacons and/or wake-up packets improves the overall spectrum efficiency. Further, the embodiments may use the central 26-tone subchannel for LP-WUR and legacy IEEE 802.11ax OFDMA transmission, but not for the LP-NB IoT devices that have a OFDM waveform. This configuration reduces the implementation cost and test/certification time & cost of IoT devices.

公开(公告)号：US20180007627A1

公开(公告)日：2018-01-04

申请号：US15196349

申请日：2016-06-29

Applicant: Intel Corporation

Inventor： Shahrnaz AZIZI ,  Thomas J. KENNEY ,  Eldad PERAHIA

IPC: H04W52/02 ,  H04L27/26

Abstract: The devices and methods herein can produce a new waveform for transmission that is robust to carrier frequency offset (CFO) errors, and hence, enables implementation of low cost and low power consumption local oscillators at the Internet of Things (IoT) devices. The proposed method builds upon the existing 802.11ax OFDMA architecture, and adds block filtering to each resource unit to reduce out of band (OOB) emissions. Embodiments also define a modified Universal Filtered OFDM (UF-OFDM) technique that adds a Guard Interval (GI) to UF-OFDM, and thus, provides a GI-UF-OFDM architecture. The added GI helps prevent inter-symbol interference (ISI) at the receiver.

公开(公告)号：US20180139761A1

公开(公告)日：2018-05-17

申请号：US15352981

申请日：2016-11-16

Applicant: INTEL CORPORATION

Inventor： Minyoung PARK ,  Ilan SUTSKOVER ,  Shahrnaz AZIZI ,  Thomas J. KENNEY ,  Eldad PERAHIA

IPC: H04W72/08 ,  H04W24/08

CPC classification number: H04W24/08 ,  H04W74/0808

Abstract: Today's IEEE 802.11 devices operating in the 2.4/5 GHz bands use a 20 MHz channel as a basic operation unit to maintain coexistence with other 802.11 devices. One exemplary aspect is directed toward using a narrower signal bandwidth (e.g. 2 MHz) in the 2.4/5 GHz bands to reduce transmit/receive power consumption or increase transmission range. However, one problem with introducing a narrow bandwidth signal is how to maintain the coexistence between a legacy IEEE 802.11 device that uses a 20 MHz signal bandwidth and a new IEEE 802.11 device that uses a narrower signal bandwidth.