US 12,171,024 B2
Scrambling sequences for request-to-send (RTS) and clear-to-send (CTS) frames
Lin Yang, San Diego, CA (US); Youhan Kim, Saratoga, CA (US); and Bin Tian, San Diego, CA (US)
Assigned to QUALCOMM Incorporated, San Diego, CA (US)
Filed by QUALCOMM Incorporated, San Diego, CA (US)
Filed on Jun. 1, 2021, as Appl. No. 17/335,243.
Claims priority of provisional application 63/045,186, filed on Jun. 28, 2020.
Prior Publication US 2021/0410188 A1, Dec. 30, 2021
Int. Cl. H04W 74/0816 (2024.01); H04L 27/26 (2006.01); H04W 74/00 (2009.01); H04W 84/12 (2009.01)
CPC H04W 74/0816 (2013.01) [H04L 27/2617 (2013.01); H04W 74/002 (2013.01); H04W 84/12 (2013.01)] 26 Claims
OG exemplary drawing
 
1. A method for wireless communication performed at a transmitting device, the method comprising:
generating a second scrambler seed value being associated with at least 11 bits, the generation being based on 7 least significant bits (LSBs) associated with a first scrambler seed value, wherein each of the 7 LSBs has a value of zero;
generating a scrambling sequence based on the second scrambler seed value and a polynomial, wherein at least one bit of a portion of the at least 11 bits has a non-zero value, the portion comprising 7 LSBs of the second scrambler seed value;
constructing a physical layer convergence protocol (PLCP) protocol data unit (PPDU) that includes a multi-user (MU) request-to-send (RTS) frame and the second scrambler seed value;
scrambling one or more portions of the PPDU based on the scrambling sequence;
transmitting the one or more scrambled portions of the PPDU; and
receiving, after transmitting the one or more scrambled portions, clear-to-send (CTS) frames, via PPDU duplicates, wherein each of the PPDU duplicates carries the CTS frame and is received over a corresponding 20 MHz frequency subband.