Waking up internet of things devices in a high efficiency wireless local-area network

Patent metadata

Field	Value
Publication number	US-2016366644-A1
Application number	US-201514868643-A
Country	US
Kind code	A1
Filing date	Sep 29, 2015
Priority date	Jun 11, 2015
Publication date	Dec 15, 2016
Grant date	—

Abstract

Apparatuses, computer readable media, and methods for waking up Internet of Things (IoT) devices in a high-efficiency wireless local-area network are disclosed. The apparatus of a high-efficiency wireless local-area network (HEW) device may include processing circuitry and transceiver circuitry configured to generate a packet for one or more stations comprising one or more sub-channels. Each sub-channel may include a common wake up physical synchronization in a physical layer and a station dedicated wake up preamble in a media access control (MAC) layer. The station dedicated wake up preamble may include a wake-up identifier for a corresponding station of the one or more stations. The processing circuitry and transceiver circuitry may be further configured to transmit the packet to the one or more stations in accordance with orthogonal frequency division multiple access (OFDMA).

First claim

1 . A wireless apparatus comprising a memory, and processing circuitry including (Physical Layer) PHY circuitry and (Medium Access Control) MAC circuitry, wherein:
the processing circuitry is configured to generate one or more packets to be transmitted on one or more sub-channels to one or more stations; the PHY circuitry is configured to generate a common wake-up physical synchronization field as part of each packet of the one or more packets; and the MAC circuitry is configured to generate a station dedicated wake-up preamble as part of each packet of the one or more packets corresponding to each station of the one or more stations; and encode the one or more packets in accordance with orthogonal frequency division multiple access (OFDMA), wherein the one or more packets are to be transmitted on the corresponding one or more sub-channels.

2 . The wireless apparatus of claim 15 , wherein the processing circuitry is further configured to:
transmit the packet in accordance with a predefined wake-up schedule of the one or more stations.

3 . The apparatus of claim 1 , wherein the one or more sub-channels have a bandwidth of one the following group: 2 Mega-Hertz (MHz), 2.03 MHz, a second bandwidth having exactly 26 data tones, 5 MHz, 10 MHz, and 20 MHz.

4 . The apparatus of claim 3 , wherein the one or more sub-channels are to be transmitted on a channel with a bandwidth of one of the following group: 2 Mega-Hertz (MHz), 2.03 MHz, 5 MHz, 10 MHz, 20 MHz, 40 MHz, 80 MHz, 160 MHz, and 320 MHz.

5 . The apparatus of claim 4 , wherein the PHY circuitry is configured to generate a legacy short-training field (L-STF), a legacy long training field (L-LTF), and a legacy signal (L-SIG) field before the common wake up physical synchronization and wherein the L-STF, L-LTF, and L-SIG are transmitted on the full bandwidth of the channel.

6 . (canceled)

7 . The apparatus of claim 1 , wherein the common wake-up physical synchronization indicates that the station dedicated wake up preamble is to be decoded to determine if the wake-up identifier identifies the corresponding station of the one or more stations.

8 . The apparatus of claim 1 , wherein the wake-up identifier is one from the following group: an identifier generated when the station associates with the wireless local-area network device, a group identifier identifying a group of stations, a unique signage generated when the station associates with the wireless local-area network device, and a unique signage generated based on association parameters when the station associates with the wireless local-area network device.

9 . The apparatus of claim 1 , wherein the wireless local-area network device is one from the following group: an Institute of Electrical and Electronic Engineers (IEEE) 802.11ax access point, a sensor hub, an IEEE 802.11ax sensor hub, an IEEE 802.11ax station, and an access gateway.

10 . The apparatus of claim 9 , wherein each of the one or more stations is one or more from the following group: an Internet of Things wireless device, a battery constrained device, an IEEE 802.11ax station, and a narrow bandwidth device of less than 20 MHz.

11 . The apparatus of claim 1 , wherein the PHY circuitry is further configured to configured to generate a common physical layer element sub-field before the common wake-up physical synchronization field.

12 . The apparatus of claim 1 , wherein PHY circuitry is further configured to generate for each packet of the one or more packets a signal A (SIG-A) sub-field after the station dedicated wake-up preamble.

13 . The apparatus of claim 12 , wherein the PHY circuitry is further configured to generate for each packet of the one or more packets a signal B (SIG-B) sub-field after the SIG-A sub-field, wherein the SIG-A sub-field comprises a modulation and coding scheme for the SIG-B sub-field.

14 . The apparatus of claim 1 , wherein the one or more packets are to be transmitted in response to a query based trigger for the one or more stations, and wherein the MAC circuitry is further configured to generate for each packet of the one or more packets a query for the corresponding station to transmit a report to the wireless apparatus.

15 . The apparatus of claim 1 further comprising and one or more antennas coupled to the transceiver circuitry.

16 . A non-transitory computer-readable storage medium that stores instructions for execution by one or more processors, the instructions to configure the one or more processors to cause a wireless apparatus to:
generate one or more packets to be transmitted on one or more sub-channels to one or more stations; generate a common wake-up physical synchronization field as part of each packet of the one or more packets; and generate a station dedicated wake-up preamble as part of each packet of the one or more packets corresponding to each station of the one or more stations; and encode the one or more packets in accordance with orthogonal frequency division multiple access (OFDMA), wherein the one or more packets are to be transmitted on the corresponding one or more sub-channels.

17 . The non-transitory computer-readable storage medium of claim 16 , wherein the instructions are further to configure the one or more processor to cause the wireless apparatus to:
transmit the packet in accordance with a predefined wake-up schedule of the one or more stations.

18 . The non-transitory computer-readable storage medium of claim 16 , wherein the one or more sub-channels have a bandwidth of one the following group: 2 Mega-Hertz (MHz), 2.03 MHz, a second bandwidth having exactly 26 data tones, 5 MHz, 10 MHz, and 20 MHz, and wherein the one or more sub-channels are to be transmitted on a channel with a bandwidth of one of: 2 Mega-Hertz (MHz), 2.03 MHz, 5 MHz, 10 MHz, 20 MHz, 40 MHz, 80 MHz, 160 MHz, and 320 MHz.

19 . A method performed by a wireless local-area network device, the method comprising:
generating one or more packets to be transmitted on one or more sub-channels to one or more stations; generating a common wake-up physical synchronization field as part of each packet of the one or more packets; and generating a station dedicated wake-up preamble as part of each packet of the one or more packets corresponding to each station of the one or more stations: and encoding the one or more packets in accordance with orthogonal frequency division multiple access (OFDMA), wherein the one or more packets are to be transmitted on the corresponding one or more sub-channels.

20 . The method of claim 19 , wherein the one or more sub-channels have a bandwidth of one the following group: 2 Mega-Hertz (MHz), 2.03 MHz, a second bandwidth having exactly 26 data tones, 5 MHz, 10 MHz, and 20 MHz, and wherein the the one or more sub-channels are to be transmitted on a channel with a bandwidth of one of: 2 mega Hertz (MHz), 2.03 MHz, 5 MHz, 10 MHz, 20 MHz, 40 MHz, 80 MHz, 160 MHz, and 320 MHz.

21 . An wireless apparatus comprising a memory, and processing circuitry including (Physical Layer) PHY circuitry and (Medium Access Control) MAC circuitry, wherein:
the PHY circuitry is configured to operate in a shallow sleep mode, and to enter a non-shallow sleep mode in response to reception on a sub-channel of a common wake-up physical synchronization field, wherein in shallow sleep mode in shallow sleep mode a portion of the MAC circuitry is asleep; and the MAC circuitry is configured to operate in a non-shallow sleep mode, wherein in non-shallow sleep mode the wireless appa

Assignees

• Ghosh Chittabrata
• Alpert Yaron

Inventors

• Ghosh Chittabrata
• Alpert Yaron

Classifications

• H04W4/005

  Electricity · mapped topic

• H04W52/0229 Primary

  where the received signal is a wanted signal · CPC title

• H04W72/0446

  Resources in time domain, e.g. slots or frames · CPC title

• H04W84/12

  WLAN [Wireless Local Area Networks] · CPC title

• H04L5/0007

  the frequencies being orthogonal, e.g. OFDM(A) or DMT · CPC title