Method and apparatus for resource allocation for multiple user transmission in a high efficiency wireless lan

Patent metadata

Field	Value
Publication number	US-2016174200-A1
Application number	US-201514965701-A
Country	US
Kind code	A1
Filing date	Dec 10, 2015
Priority date	Dec 12, 2014
Publication date	Jun 16, 2016
Grant date	—

Abstract

Methods and apparatus for resource allocation for multiple user transmission in a High Efficiency WLAN (HEW) are described. An embodiment is a method for transmitting a Physical layer Protocol Data Unit (PPDU) by an access point (AP) to a plurality of stations (STAs). The method may include transmitting, to the plurality of STAs, a preamble including a High-Efficiency SIGNAL (HE-SIG) field, an HE-Short Training Field (HE-STF) field and an HE-Long Training Field (HE-LTF) field in the PPDU on a transmission channel; and transmitting, on the transmission channel, a data field including a group addressed frame transmitted in a first subchannel among a plurality of subchannels into which the transmission channel is divided.

First claim

What is claimed is:

1 . A method for transmitting a Physical layer Protocol Data Unit (PPDU) by an access point (AP) to a plurality of stations (STAs), the method comprising:
transmitting, to the plurality of STAs, a preamble including a High-Efficiency SIGNAL (HE-SIG) field, an HE-Short Training Field (HE-STF) field and an HE-Long Training Field (HE-LTF) field in the PPDU on a transmission channel; and transmitting, on the transmission channel, a data field including a group addressed frame transmitted in a first subchannel among a plurality of subchannels into which the transmission channel is divided.

2 . The method according to claim 1 , wherein an individually addressed frame is transmitted in a second subchannel among the plurality of subchannels.

3 . The method according to claim 2 , wherein the first subchannel is different from the second subchannel.

4 . The method according to claim 3 , wherein the group addressed frame is intended for multiple STAs and the individually addressed frame is intended for a single STA.

5 . The method according to claim 4 , wherein STAs for which the group addressed frame is intended do not overlap with a STA for which the individually addressed frame is intended.

6 . The method according to claim 5 , wherein the HE-SIG field includes resource allocation information intended for the plurality of STAs.

7 . The method according to claim 6 , wherein the resource allocation information intended for the plurality of STAs includes resource allocation information of STAs for which the group addressed frame is intended and resource allocation information of a STA for which the individually addressed frame is intended,
wherein the resource allocation information of STAs for which the group addressed frame is intended indicates the first subchannel, and wherein the resource allocation information of the STA for which the individually addressed frame is intended indicates the second subchannel.

8 . The method according to claim 7 , wherein the resource allocation information intended for the plurality of STAs indicates that one or more STAs are assigned to each of the plurality of subchannels, wherein a single subchannel is assigned for a given STA.

9 . The method according to claim 8 , wherein the resource allocation information intended for the plurality of STAs includes subchannel allocation structure information and subchannel assignment information.

10 . The method according to claim 9 , wherein the subchannel allocation structure information indicates subchannel structure in a frequency domain, and
wherein the subchannel assignment information includes STA identification information indicating a STA assigned to a subchannel.

11 . The method according to claim 10 , wherein the resource allocation information intended for the plurality of STAs further includes information indicating whether a subchannel is allocated for Multiple User-Multiple Inputs and Multiple Outputs (MU-MIMO).

12 . The method according to claim 11 , wherein the resource allocation information intended for the plurality of STAs further includes information on number of spatial streams used for one or more STAs assigned to a subchannel.

13 . The method according to claim 12 , wherein the resource allocation information further includes information on modulation and coding scheme (MCS) used for a subchannel.

14 . The method according to claim 13 , wherein the resource allocation information includes resource allocation information per 20 MHz channel.

15 . The method according to claim 1 , wherein the PPDU includes information eliciting uplink transmission from one or more of the plurality of STAs to the AP.

16 . The method according to claim 15 , wherein the transmission channel includes a plurality of 20 MHz channels, and
uplink transmission by one or more STAs of the plurality of STAs is performed in a 20 MHz channel on which at least one data unit including the information eliciting uplink transmission is transmitted.

17 . The method according to claim 16 , wherein the uplink transmission by the one or more STAs is performed on at least one subchannel in the 20 MHz channel on which the information eliciting uplink transmission is transmitted, and the at least one subchannel is allocated by the information eliciting uplink transmission.

18 . A method for receiving a Physical layer Protocol Data Unit (PPDU) by a station (STA) from an access point (AP), the method comprising:
receiving, from the AP, a preamble including a High-Efficiency SIGNAL (HE-SIG) field, an HE-Short Training Field (HE-STF) field and an HE-Long Training Field (HE-LTF) field in the PPDU on a transmission channel; and receiving, from the AP, a group addressed frame transmitted in a first subchannel among a plurality of subchannels into which the transmission channel is divided, the group addressed frame included in a data field transmitted by the AP on the transmission channel.

19 . The method according to claim 18 , wherein an individually addressed frame is transmitted in a second subchannel among the plurality of subchannels.

20 . The method according to claim 19 , wherein the first subchannel is different from the second subchannel.

Assignees

• Newracom Inc

Inventors

• Seok Yongho

Classifications

• H04B7/0452

  Multi-user MIMO systems · CPC title

• H04W84/12

  WLAN [Wireless Local Area Networks] · CPC title

• H04W72/04 Primary

  Wireless resource allocation · CPC title

• H04L5/003

  Arrangements for allocating sub-channels of the transmission path · CPC title

• H04L5/0001

  Arrangements for dividing the transmission path (two-way operation using the same type of signal, i.e. duplex H04L5/14) · CPC title