Method and apparatus for transmitting frame in wireless lan

Patent metadata

Field	Value
Publication number	US-2016374085-A1
Application number	US-201515123415-A
Country	US
Kind code	A1
Filing date	Feb 16, 2015
Priority date	Mar 3, 2014
Publication date	Dec 22, 2016
Grant date	—

Abstract

A method and an apparatus for transmitting a frame in a wireless LAN are disclosed. The method for transmitting a frame in a wireless LAN comprises: by an STA, receiving an uplink transmission instruction frame from an AP; and by the STA, transmitting, to the AP, a first uplink frame as a response to the uplink transmission instruction frame, wherein the uplink transmission instruction frame instructs transmission of the first uplink frame and a second uplink frame on overlapping time resources, the first uplink frame is transmitted at a transmission timing determined on the basis of UIFS, and the UIFS may be a fixed value.

First claim

1 - 8 . (canceled)

9 . A method for transmitting a frame in a wireless local area network (LAN), comprising:
transmitting, by an access point (AP), a physical layer protocol data unit (PPDU) comprising an uplink transmission indication frame triggering transmission of a plurality of uplink frames from a plurality of stations, wherein uplink transmission power indexes for the plurality of stations are separately configured by the uplink transmission indication frame, wherein modulation and coding scheme (MCS) indexes for the plurality of uplink frames are separately configured by the uplink transmission indication frame; and in response to the uplink transmission indication frame, receiving, by the AP, the plurality of uplink frames from the plurality of stations on an overlapped time duration, wherein the plurality of uplink frames are configured based on the uplink transmission power indexes and the MCS indexes.

10 . The method of claim 9 , wherein frequency resources for the plurality of uplink frames are separately configured by the uplink transmission indication frame.

11 . The method of claim 10 , wherein the plurality of uplink frames are received based on multiple-user (MU) orthogonal frequency division multiple access (OFDMA) scheme.

12 . The method of claim 9 , wherein the uplink transmission indication frame indicates identifiers of the plurality of stations,

13 . The method of claim 9 , wherein the PPDU comprises a first physical control signal field indicating an identifier of a basic service set (BSS) associated to which the AP belongs.

14 . The method of claim 12 , wherein the PPDU further comprises a second physical control signal field and a data field, wherein the second physical control signal field indicates a MCS index for the data field, wherein the first physical control signal field indicates a MCS index for the second physical control signal field.

15 . An access point (AP) in a wireless local area network (LAN), comprising:
a radio frequency unit configured to transmit and receive a radio signal; and a processor coupled to the radio frequency unit and configured to:
transmit a physical layer protocol data unit (PPDU) comprising an uplink transmission indication frame triggering transmission of a plurality of uplink frames from a plurality of stations, wherein uplink transmission power indexes for the plurality of stations are separately configured by the uplink transmission indication frame, wherein modulation and coding scheme (MCS) indexes for the plurality of uplink frames are separately configured by the uplink transmission indication frame; and
in response to the uplink transmission indication frame, receive the plurality of uplink frames from the plurality of stations on an overlapped time duration, wherein the plurality of uplink frames are configured based on the uplink transmission power indexes and the MCS indexes.

16 . The access point of claim 15 , wherein frequency resources for the plurality of uplink frames are separately configured by the uplink transmission indication frame.

17 . The access point of claim 16 , wherein the plurality of uplink frames are received based on multiple-user (MU) orthogonal frequency division multiple access (OFDMA) scheme.

18 . The access point of claim 15 , wherein the uplink transmission indication frame indicates identifiers of the plurality of stations,

19 . The access point of claim 15 , wherein the PPDU comprises a first physical control signal field indicating an identifier of a basic service set (BSS) associated to which the AP belongs.

20 . The access point of claim 19 , wherein the PPDU further comprises a second physical control signal field and a data field, wherein the second physical control signal field indicates a MCS index for the data field, wherein the first physical control signal field indicates a MCS index for the second physical control signal field.

21 . A wireless station in a wireless local area network (LAN), comprising:
a radio frequency unit configured to transmit and receive a radio signal; and a processor coupled to the radio frequency unit and configured to:
receive, from an access point (AP), a physical layer protocol data unit (PPDU) comprising an uplink transmission indication frame triggering transmission of a plurality of uplink frames from a plurality of stations, wherein the uplink transmission indication frame includes uplink transmission power indexes separately configured for the plurality of stations, wherein the uplink transmission indication frame further includes modulation and coding scheme (MCS) indexes separately configured for the plurality of uplink frames;
in response to the uplink transmission indication frame, configure a uplink frame based on a corresponding uplink transmission power index and a corresponding MCS index for the wireless station; and
transmit the configured uplink frame to the AP on an overlapped time duration, during which the plurality of uplink frame are transmitted to the AP.

22 . The wireless station of claim 21 , wherein frequency resources for the plurality of uplink frames are separately configured by the uplink transmission indication frame.

23 . The wireless station of claim 22 , wherein the plurality of uplink frames are transmitted based on multiple-user (MU) orthogonal frequency division multiple access (OFDMA) scheme.

24 . The wireless station of claim 21 , wherein the uplink transmission indication frame indicates identifiers of the plurality of stations,

25 . The wireless station of claim 21 , wherein the PPDU comprises a first physical control signal field indicating an identifier of a basic service set (BSS) associated to which the AP belongs.

26 . The wireless station of claim 25 , wherein the PPDU further comprises a second physical control signal field and a data field, wherein the second physical control signal field indicates a MCS index for the data field, wherein the first physical control signal field indicates a MCS index for the second physical control signal field.

Assignees

• Lg Electronics Inc

Inventors

• Chun Jinyoung
• Lee Wookbong
• Ryu Kiseon
• Choi Jinsoo
• Lim Dongguk
• Cho Hangyu

Classifications

• H04W72/23

  in the downlink direction of a wireless link, i.e. towards a terminal · CPC title

• H04W72/20

  Control channels or signalling for resource management · CPC title

• H04W74/04

  Scheduled access (hybrid access H04W74/02) · CPC title

• H04W52/362

  Aspects of the step size · CPC title

• H04W84/12

  WLAN [Wireless Local Area Networks] · CPC title