Pre-high-efficiency (he)-short training field preamble transmission for the he-trigger based physical layer convergence protocol (plcp) protocol data unit (ppdu)

Patent metadata

Field	Value
Publication number	US-2018007179-A1
Application number	US-201615386916-A
Country	US
Kind code	A1
Filing date	Dec 21, 2016
Priority date	Jun 29, 2016
Publication date	Jan 4, 2018
Grant date	—

Abstract

Embodiments of an access point (AP) may comprise memory and processing circuitry coupled to the memory, and transceiver circuitry coupled to the processing circuitry. The processing circuitry of the AP may be configured to generate a trigger frame to allocate a center 26 tone RU for an HE-trigger-based PPDU, the center 26 tone RU having an adjacent upper 20 MHz subchannel and an adjacent lower 20 MHz subchannel. In an embodiment, the center 26 tone RU is for a station (STA) and wherein the trigger frame indicates to the STA to transmit a pre-HE-STF preamble on one of the adjacent upper 20 MHz subchannel, the adjacent lower 20 MHz subchannel, or both the adjacent upper and lower 20 MHz subchannels, and configure the wireless device to transmit the trigger frame to the station.

First claim

What is claimed is:

1 . An apparatus of a wireless device comprising memory; and processing circuitry coupled to the memory, the processing circuitry configured to:
generate a trigger frame to allocate a center 26 tone RU for an HE-trigger-based PPDU, the center 26 tone RU having an adjacent upper 20 MHz subchannel and an adjacent lower 20 MHz subchannel, wherein the center 26 tone RU is for a station (STA) and wherein the trigger frame indicates to the STA to transmit a pre-HE-STF preamble on one of the adjacent upper 20 MHz subchannel, the adjacent lower 20 MHz subchannel, or both the adjacent upper and lower 20 MHz subchannels; and configure the wireless device to transmit the trigger frame to the STA.

2 . The apparatus of claim 1 , wherein the processing circuitry is further configured to decode the pre-HE-STF preamble, received from the STA, on one of the adjacent upper 20 MHz subchannel, the adjacent lower 20 MHz subchannel, or both the adjacent upper and lower 20 MHz subchannels.

3 . The apparatus of claim 1 , wherein: a working bandwidth of the wireless device is 80 MHz

4 . The apparatus of claim 1 , wherein the HE-trigger-based PPDU is scheduled on the center 26 tone RU of 80 MHz bandwidth, or 80 MHz+80 MHz bandwidth or 160 MHz bandwidth.

5 . The apparatus of claim 1 , wherein the pre-HE-STF preamble includes a legacy preamble RL-SIG and HE-SIG-A.

6 . The apparatus of claim 1 , wherein the wireless device and the one or more stations are each one from the following group: an Institute of Electrical and Electronic Engineers (IEEE) 802.11ax access point, an IEEE 802.11ax station, an IEEE 802.11 station, and an IEEE 802.11 access point.

7 . The apparatus of claim 1 , further comprising transceiver circuitry coupled to the processing circuitry.

8 . The apparatus of claim 7 , further comprising one or more antennas coupled to the transceiver circuitry.

9 . The apparatus of claim 1 , wherein the processing circuitry is further configured to prevent the generation of a trigger frame to allocate only a center 26 tone RU for an HE-trigger based PPDU.

10 . 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 device to:
generate a trigger frame to allocate a center 26 tone RU for an HE-trigger-based PPDU, the center 26 tone RU having an adjacent upper 20 MHz subchannel and an adjacent lower 20 MHz subchannel, wherein the center 26 tone RU is for a station (STA) and wherein the trigger frame indicates to the STA to transmit a pre-HE-STF preamble on one of the adjacent upper 20 MHz subchannel, the adjacent lower 20 MHz subchannel, or both the adjacent upper and lower 20 MHz subchannels; and configure the wireless device to transmit the trigger frame to the STA

11 . The non-transitory computer-readable storage medium according to claim 10 , wherein:
the HE-trigger-based PPDU is scheduled on the center 26 tone RU of 80 MHz bandwidth, or 80 MHz+80 MHz bandwidth or 160 MHz bandwidth.

12 . The non-transitory computer-readable storage medium according to claim 10 , wherein:
a working bandwidth of the wireless device is 80 MHz.

13 . The non-transitory computer-readable storage medium according to claim 10 , wherein:
the pre-HE-STF preamble includes a legacy preamble RL-SIG and HE-SIG-A.

14 . An apparatus of a station comprising memory; and processing circuitry coupled to the memory, the processing circuitry configured to:
decode a trigger frame, wherein the trigger frame allocates a center 26 tone RU for an HE-trigger-based PPDU, the center 26 tone RU having an adjacent upper 20 MHz subchannel and an adjacent lower 20 MHz subchannel; and configure the station to transmit a pre-HE-STF preamble on one of the adjacent upper 20 MHz subchannel, the adjacent lower 20 MHz subchannel, or both the adjacent upper and lower 20 MHz subchannels.

15 . The apparatus of claim 14 , further comprising transceiver circuitry coupled to the processing circuitry.

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

17 . The apparatus of claim 14 , wherein the wireless device is one of an Institute of Electrical and Electronic Engineering (IEEE) 802.11ax station or 802.11 station.

18 . A method performed by a wireless device, the method comprising:
generating a trigger frame to allocate a center 26 tone RU for an HE-trigger-based PPDU, the center 26 tone RU having an adjacent upper 20 MHz subchannel and an adjacent lower 20 MHz subchannel, wherein the center 26 tone RU is for a station (STA) and wherein the trigger frame indicates to the STA to transmit a pre-HE-STF preamble on one of the adjacent upper 20 MHz subchannel, the adjacent lower 20 MHz subchannel, or both the adjacent upper and lower 20 MHz subchannels; and configure the wireless device to transmit the trigger frame to the STA.

19 . The method of claim 18 , wherein a working bandwidth of the wireless device is 80 MHz.

20 . The method of claim 18 , further comprising including in the pre-HE-STF preamble a legacy preamble RL-SIG and HE-SIG-A.

21 . The method of claim 18 , further comprising using transceiver circuitry coupled to the processing circuitry to transmit the trigger frame to the station.

22 . The method of claim 21 , further comprising using one or more antennas coupled to the transceiver circuitry to transmit the trigger frame to the station.

23 . The method of claim 18 , further comprising configuring the processing circuitry to prevent the generation of a trigger frame that allocates only a center 26 tone RU for an HE-trigger based PPDU.

24 . The method of claim 18 , wherein the wireless device is an access point operable in a wireless local area network.

25 . A method performed by a station, the method comprising:
decoding a trigger frame, wherein the trigger frame allocates a center 26 tone RU for an HE-trigger-based PPDU, the center 26 tone RU having an adjacent upper 20 MHz subchannel and an adjacent lower 20 MHz subchannel; and configuring the station to transmit a pre-HE-STF preamble on one of the adjacent upper 20 MHz subchannel, the adjacent lower 20 MHz subchannel, or both the adjacent upper and lower 20 MHz subchannels.

26 . The method of claim 25 , further comprising using transceiver circuitry coupled to the processing circuitry to transmit the HE-trigger-based PPDU.

27 . The method of claim 26 , further comprising one or more antennas coupled to the transceiver circuitry to transmit the HE-trigger-based PPDU.

28 . The method of claim 25 , wherein the wireless device is one of an Institute of Electrical and Electronic Engineering (IEEE) 802.11ax station or 802.11 station.

29 . The method of claim 28 , wherein the trigger frame is received from an access point (AP) operating in a wireless local area network (WLAN).

Assignees

• Chen Xiaogang
• Cariou Laurent
• Li Qinghua
• Stacey Robert J

Inventors

• Chen Xiaogang
• Cariou Laurent
• Li Qinghua
• Stacey Robert J

Classifications

• H04W88/08

  Access point devices · CPC title

• H04L69/22

  Parsing or analysis of headers · CPC title

• H04L69/323

  in the physical layer [OSI layer 1] · CPC title

• H04L69/324 Primary

  in the data link layer [OSI layer 2], e.g. HDLC · CPC title

• H04W84/12

  WLAN [Wireless Local Area Networks] · CPC title