Method for setting modulation and coding scheme in wireless RAN system and apparatus supporting the same

• US 9,629,129 B2
• Filed: 10/17/2016
• Issued: 04/18/2017
• Est. Priority Date: 08/27/2009
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Seok, Yong Ho
• Primary Examiner(s): Shah, Chirag
• Assistant Examiner(s): PANCHOLI, RINA C
• Application Number:
  US15/295,417
• Publication Number:
  US 20170041913A1
• Time in Patent Office: 183 Days
• Field of Search: None
• CPC Class Codes: H04B 7/0452 Multi-user MIMO systems
• CPC Class Codes: H04B 7/0617 for beam forming
• CPC Class Codes: H04B 7/0697 using spatial multiplexing
• CPC Class Codes: H04L 1/0003 by switching between different modulation schemes
• CPC Class Codes: H04L 1/0009 by adapting the channel coding H04L1/1812 takes precedence
• CPC Class Codes: H04L 1/0031 Multiple signaling transmission H04L1/1664, F15 take precedence
• CPC Class Codes: H04L 1/1607 Details of the supervisory signal
• CPC Class Codes: H04L 27/2626 Arrangements specific to the transmitter only
• CPC Class Codes: H04W 72/046 the resource being in the space domain, e.g. beams
• CPC Class Codes: H04W 72/20 Control channels or signalling for resource management
• CPC Class Codes: H04W 84/12 WLAN [Wireless Local Area Networks]

Abstract

A method and a transmitting station for transmitting data by using a multi-user multiple input multiple output (MU-MIMO) in a wireless local area network system are discussed. The method according to an embodiment includes transmitting a physical layer convergence procedure (PLCP) protocol data unit (PPDU) including a bundled interface field, a modulation and coding scheme (MCS) index field and a data field. The bundled interface field indicates a number of at least one spatial stream allocated to each of a plurality of receiving stations and a total number of spatial streams allocated to the plurality of receiving stations. The MCS index field indicates a same MCS index used for modulating and coding the at least one spatial stream. The data field is modulated and coded by an MCS scheme indicated by the MCS index field and transmitted via the plurality of spatial streams indicated by the bundled interface field.

Claims

1. A method of transmitting data by a transmitting station by using a multi-user multiple input multiple output (MU-MIMO) in a wireless local area network system, the method comprising:

generating a physical layer convergence procedure (PLCP) protocol data unit (PPDU), the PPDU including a bundled interface field, a modulation and coding scheme (MCS) index field and a data field; and

transmitting the PPDU to a plurality of receiving stations,

wherein the bundled interface field indicates a number of at least one spatial stream allocated to each of the plurality of receiving stations and a total number of a plurality of spatial streams allocated to the plurality of receiving stations,

wherein the MCS index field indicates a same MCS index used for modulating and coding the at least one spatial stream allocated to each of the plurality of receiving stations, and

wherein the data field is modulated and coded by an MCS scheme indicated by the MCS index field and transmitted via the plurality of spatial streams indicated by the bundled interface field.

2. The method of claim 1, wherein the transmitting station is an access point (AP).

3. The method of claim 1, wherein the PPDU further includes a legacy-short training field (L-STF), a legacy-long training field (L-LTF) and a legacy-signal field (L-SIG).

4. The method of claim 1, wherein a maximum number of the total number of the plurality of spatial streams is 8.

5. The method of claim 1, wherein the PPDU is transmitted in a bandwidth of 40 MHz or 80 MHz.

6. A device configured to transmit data by using a multi-user multiple input multiple output (MU-MIMO) in a wireless local area network system, the device comprising:

a transceiver configured to receive and transmit radio signals; and

a processor operatively coupled with the transceiver and configured to;

generate a physical layer convergence procedure (PLCP) protocol data unit (PPDU), the PPDU including a bundled interface field, a modulation and coding scheme (MCS) index field and a data field, and

instruct the transceiver to transmit the PPDU to a plurality of receiving stations,

wherein the bundled interface field indicates a number of at least one spatial stream allocated to each of the plurality of receiving stations and a total number of a plurality of spatial streams allocated to the plurality of receiving stations,

wherein the MCS index field indicates a same MCS index used for modulating and coding the at least one spatial stream allocated to each of the plurality of receiving stations, and

wherein the data field is modulated and coded by an MCS scheme indicated by the MCS index field and transmitted via the plurality of spatial streams indicated by the bundled interface field.

7. The device of claim 6, wherein the device is an access point (AP).

8. The device of claim 6, wherein the PPDU further includes a legacy-short training field (L-STF), a legacy-long training field (L-LTF) and a legacy-signal field (L-SIG).

9. The device of claim 6, wherein a maximum number of the total number of the plurality of spatial streams is 8.

10. The device of claim 6, wherein the PPDU is transmitted in a bandwidth of 40 MHz or 80 MHz.