US 9,813,210 B2
Wireless communication method and wireless communication terminal using same
Jinsam Kwak, Gyeonggi-do (KR); Juhyung Son, Gyeonggi-do (KR); and Geonjung Ko, Gyeonggi-do (KR)
Assigned to Wilus Institute Of Stands And Technology Inc., Seoul (KR)
Filed by WILUS INSTITUTE OF STANDARDS AND TECHNOLOGY INC., Seoul (KR)
Filed on Feb. 21, 2017, as Appl. No. 15/438,720.
Application 15/438,720 is a continuation of application No. PCT/KR2015/008892, filed on Aug. 25, 2015.
Claims priority of application No. 10-2014-0111018 (KR), filed on Aug. 25, 2014; and application No. 10-2014-0165686 (KR), filed on Nov. 25, 2014.
Prior Publication US 2017/0163395 A1, Jun. 8, 2017
Int. Cl. H04W 28/06 (2009.01); H04L 5/00 (2006.01); H04L 27/26 (2006.01); H04L 27/18 (2006.01)
CPC H04L 5/0048 (2013.01) [H04L 27/18 (2013.01); H04L 27/2613 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A wireless communication terminal comprising:
a transceiver configured to transmit and receive a wireless signal;
and a processor configured to control an operation of the wireless communication terminal, wherein the processor is configured to:
generate a packet including a first preamble and a second preamble, and transmit the generated packet, wherein the second preamble comprises a first signal field (SIG) and a high efficiency signal field A (HE-SIG-A), the first SIG is composed of a first orthogonal frequency division multiplexing (OFDM) symbol of the second preamble, and the high efficiency signal field A (HE-SIG-A) at least includes a second OFDM symbol and a third OFDM symbol of the second preamble, wherein the first OFDM symbol and the second OFDM symbol of the second preamble are modulated using binary phase shift keying (BPSK), and wherein a modulation scheme used for the third OFDM symbol of the second preamble indicates whether or not the second preamble comprises a repeated HE-SIG-A (RHE-SIG-A)
wherein when the third OFDM symbol is modulated using quadrature binary phase shift keying (QBPSK), the second preamble comprises the RHE-SIG-A, and wherein when the third OFDM symbol is modulated using BPSK, the second preamble does not comprise the RHE-SIG-A.