Method and apparatus for transmitting control information in wlan system

Patent metadata

Field	Value
Publication number	US-2016308591-A1
Application number	US-201615192730-A
Country	US
Kind code	A1
Filing date	Jun 24, 2016
Priority date	Sep 9, 2009
Publication date	Oct 20, 2016
Grant date	—

Abstract

A method and a radio apparatus for signal transmission in a Wireless Local Area Network (WLAN) system are discussed. The method according to an embodiment includes generating first and second very high throughput (VHT) fields including first and second control information, respectively; and transmitting a physical layer protocol data unit (PPDU) including the first and second VHT fields to at least one target station. The first VHT field includes an indicator indicating whether the PPDU is to be transmitted by using a single-user multiple input multiple output (SU-MIMO) scheme or a multi-user multiple input multiple output (MU-MIMO) scheme.

First claim

What is claimed is:

1 . A method of signal transmission in a Wireless Local Area Network (WLAN) system, the method comprising:
generating, by a processor in a station, first and second very high throughput (VHT) fields including first and second control information, respectively; and transmitting, by a transceiver in the station, a physical layer protocol data unit (PPDU) including the first and second VHT fields to at least one target station, wherein the first VHT field includes an indicator indicating whether the PPDU is to be transmitted by using a single-user multiple input multiple output (SU-MIMO) scheme or a multi-user multiple input multiple output (MU-MIMO) scheme.

2 . The method of claim 1 , wherein the second VHT field includes a modulation and coding scheme (MCS) index indicating an MCS used in the transmitting of the PPDU.

3 . The method of claim 1 , wherein the second VHT field is generated by using an MU-MIMO steering matrix.

4 . The method of claim 1 , wherein the first VHT field is transmitted over 48 data subcarriers and the second VHT field is transmitted over 52 data subcarriers.

5 . The method of claim 1 , wherein different scrambling codes are applied to signals transmitted to a plurality of target stations.

6 . The method of claim 1 , wherein an identification value indicating one of the at least one target station is included in the first VHT field.

7 . The method of claim 1 , wherein the second VHT field is generated by using an MU-MIMO steering matrix, and a number of rows of the column matrix is determined based on a number of spatial streams for each of the at least one target station.

8 . The method of claim 1 , wherein a first cyclic shift is applied to the first VHT field and a second cyclic shift is applied to the second VHT field.

9 . The method of claim 1 , wherein the first VHT field indicates a number of spatial streams for the at least one target station.

10 . The method of claim 1 , wherein the first VHT field indicates a total number of spatial streams for a plurality of target stations.

11 . The method of claim 1 , wherein the first control information includes indication information indicating at least one spatial stream of another target station.

12 . The method of claim 11 , wherein the indication information is used to reduce interference caused by the at least one spatial stream of another target station.

13 . A radio apparatus for signal transmission in a Wireless Local Area Network (WLAN) system, the radio apparatus comprising:
a processor configured to generate first and second very high throughput (VHT) fields including first and second control information, respectively; and a transceiver coupled to the processor and configured to transmit a physical layer protocol data unit (PPDU) including the first and second VHT fields to at least one target station, wherein the first VHT field includes an indicator indicating whether the PPDU is to be transmitted by using a single-user multiple input multiple output (SU-MIMO) scheme or a multi-user multiple input multiple output (MU-MIMO) scheme.

14 . The radio apparatus of claim 13 , wherein the second VHT field includes a modulation and coding scheme (MCS) index indicating an MCS used in the transmitting of the PPDU.

15 . The radio apparatus of claim 13 , wherein the second VHT field is generated by using an MU-MIMO steering matrix.

16 . The radio apparatus of claim 13 , wherein the first VHT field is transmitted over 48 data subcarriers and the second VHT field is transmitted over 52 data subcarriers.

17 . The radio apparatus of claim 13 , wherein different scrambling codes are applied to signals transmitted to a plurality of target stations.

18 . The radio apparatus of claim 13 , wherein an identification value indicating one of the at least one target station is included in the first VHT field.

19 . The radio apparatus of claim 13 , wherein the second VHT field is generated by using an MU-MIMO steering matrix, and a number of rows of the column matrix is determined based on a number of spatial streams for each of the at least one target station.

20 . The radio apparatus of claim 13 , wherein a first cyclic shift is applied to the first VHT field and a second cyclic shift is applied to the second VHT field.

21 . The radio apparatus of claim 13 , wherein the first VHT field indicates a number of spatial streams for the at least one target station.

22 . The radio apparatus of claim 13 , wherein the first VHT field indicates a total number of spatial streams for a plurality of target stations.

23 . The radio apparatus of claim 13 , wherein the first control information includes indication information indicating at least one spatial stream of another target station.

24 . The radio apparatus of claim 23 , wherein the indication information is used to reduce interference caused by the at least one spatial stream of another target station.

25 . A radio apparatus for signal transmission in a Wireless Local Area Network (WLAN) system, the radio apparatus comprising:
a first means for generating first and second very high throughput (VHT) fields including first and second control information, respectively; and a second means for transmitting a physical layer protocol data unit (PPDU) including the first and second VHT fields to at least one target station, wherein the first VHT field includes an indicator indicating whether the PPDU is to be transmitted by using a single-user multiple input multiple output (SU-MIMO) scheme or a multi-user multiple input multiple output (MU-MIMO) scheme.

Assignees

• Lg Electronics Inc

Inventors

• Lee Dae Won
• Roh Dong Wook
• Kang Byeong Woo
• Seok Yong Ho
• Noh Yu Jin
• Kim Bong Hoe

Classifications

• H04W72/20

  Control channels or signalling for resource management · CPC title

• H04B7/0486

  taking channel rank into account · CPC title

• H04W84/12

  WLAN [Wireless Local Area Networks] · CPC title

• H04B7/0452 Primary

  Multi-user MIMO systems · CPC title

• H04B7/0473

  taking constraints in layer or codeword to antenna mapping into account · CPC title