US 12,237,920 B2
Physical layer frame format for WLAN
Hongyuan Zhang, Fremont, CA (US); Hui-Ling Lou, Sunnyvale, CA (US); Rohit U. Nabar, Sunnyvale, CA (US); Sudhir Srinivasa, Los Gatos, CA (US); Mao Yu, San Jose, CA (US); and Raja Banerjea, Sunnyvale, CA (US)
Assigned to RAKUTEN GROUP, INC., Tokyo (JP)
Filed by RAKUTEN GROUP, INC., Tokyo (JP)
Filed on Sep. 11, 2023, as Appl. No. 18/244,792.
Application 18/244,792 is a continuation of application No. 17/334,496, filed on May 28, 2021, granted, now 11,757,570.
Application 17/334,496 is a continuation of application No. 15/595,116, filed on May 15, 2017, granted, now 11,025,368, issued on Jun. 1, 2021.
Application 15/595,116 is a continuation of application No. 12/758,603, filed on Apr. 12, 2010, granted, now 9,655,002, issued on May 16, 2017.
Claims priority of provisional application 61/319,773, filed on Mar. 31, 2010.
Claims priority of provisional application 61/252,290, filed on Oct. 16, 2009.
Claims priority of provisional application 61/244,779, filed on Sep. 22, 2009.
Claims priority of provisional application 61/241,760, filed on Sep. 11, 2009.
Claims priority of provisional application 61/240,945, filed on Sep. 9, 2009.
Claims priority of provisional application 61/240,604, filed on Sep. 8, 2009.
Claims priority of provisional application 61/234,943, filed on Aug. 18, 2009.
Claims priority of provisional application 61/233,440, filed on Aug. 12, 2009.
Claims priority of provisional application 61/232,724, filed on Aug. 10, 2009.
Claims priority of provisional application 61/229,900, filed on Jul. 30, 2009.
Claims priority of provisional application 61/228,911, filed on Jul. 27, 2009.
Claims priority of provisional application 61/227,360, filed on Jul. 21, 2009.
Claims priority of provisional application 61/181,518, filed on May 27, 2009.
Claims priority of provisional application 61/168,732, filed on Apr. 13, 2009.
Prior Publication US 2023/0421295 A1, Dec. 28, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H04L 1/00 (2006.01); H04L 27/26 (2006.01); H04L 69/18 (2022.01); H04W 28/06 (2009.01); H04W 84/12 (2009.01); H04W 99/00 (2009.01)
CPC H04L 1/0079 (2013.01) [H04L 1/0072 (2013.01); H04L 1/009 (2013.01); H04L 27/2613 (2013.01); H04L 69/18 (2013.01); H04W 28/06 (2013.01); H04L 27/26132 (2021.01); H04W 84/12 (2013.01); H04W 99/00 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for generating and transmitting a physical layer (PHY) data unit for transmission via a communication channel, the PHY data unit conforming to a first communication protocol, the method comprising:
generating, at a communication device, the PHY data unit, including generating a preamble of the PHY data unit, wherein
the preamble is generated to include a first legacy portion and a first non-legacy portion that follows the first legacy portion,
the first non-legacy portion is generated to include i) a first orthogonal frequency division multiplexing (OFDM) symbol that immediately follows the first legacy portion and that is modulated using binary phase shift keying (BPSK), and ii) a second OFDM symbol that immediately follows the first OFDM symbol and that is modulated using BPSK modulation rotated by 90 degrees (Q-BPSK),
the first OFDM symbol being modulated using BPSK modulation and the second OFDM symbol being modulated using Q-BPSK indicate to a receiver device that conforms to the first communication protocol that the data unit conforms to the first communication protocol,
the first non-legacy portion is generated to further include fields that follow the second OFDM symbol and that conform to the first communication protocol,
a second communication protocol defines a preamble format that includes i) a second legacy portion corresponding to the first legacy portion, and ii) a second non-legacy portion that follows the second legacy portion, the second communication protocol specifying that a third OFDM symbol that immediately follows the second legacy portion is modulated using Q-BPSK, and
the first OFDM symbol is modulated using BPSK modulation to cause a receiver device that conforms to the second communication protocol to determine that the PHY data unit conforms to a third communication protocol that is different than the first communication protocol and the second communication protocol; and
transmitting, with the communication device, the PHY data unit via the communication channel.