US RE49,622 E1
Wireless communication device and wireless communication method
Toshihisa Nabetani, Kawasaki (JP); Tsuguhide Aoki, Kawasaki (JP); and Hiroki Mori, Kawasaki (JP)
Assigned to INTERNATIONAL SEMICONDUCTOR GROUP, Seoul (KR)
Filed by INTERNATIONAL SEMICONDUCTOR GROUP, Seoul (KR)
Filed on Aug. 28, 2020, as Appl. No. 17/6,357.
Application 15/192,403 is a continuation of application No. PCT/JP2015/050420, filed on Jan. 5, 2015.
Application 17/006,357 is a reissue of application No. 15/192,403, filed on Jun. 24, 2016, granted, now 10,063,342, issued on Aug. 28, 2018.
Claims priority of application No. 2013-273109 (JP), filed on Dec. 27, 2013.
Int. Cl. H04L 1/00 (2006.01); H04B 7/06 (2006.01); H04B 7/0452 (2017.01); H04L 5/00 (2006.01)
CPC H04L 1/0026 (2013.01) [H04B 7/0452 (2013.01); H04B 7/068 (2013.01); H04B 7/0697 (2013.01); H04L 5/00 (2013.01); H04L 5/0094 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A wireless communication device, comprising:
a transmitter configured to transmit a first frame containing notification information to specify a first wireless terminal and a second wireless terminal and a second frame for channel estimation; and
a receiver configured to receive a third frame transmitted from the first wireless terminal in response to the first frame and a fourth frame transmitted from the second wireless terminal; in response to the first frame,
wherein the third frame and the fourth frame are transmitted in a multiplexing scheme by the first wireless terminal and the second wireless terminal,
wherein the third frame contains first channel information estimated based on the second frame,
wherein the fourth frame contains second channel information estimated based on the second frame, and
wherein
the first frame contains first information to specify a preamble of the third frame and a preamble of the fourth frame, the preamble of the third frame and the preamble of the fourth frame include mutually-orthogonal bit patterns for channel estimation, and the receiver receives the third frame and the fourth frame whose preambles include the bit patterns specified by the first information from the first terminal and the second terminal in same frequency band, or
the first frame contains second information to specify a first subcarrier used for transmission of a preamble of the third frame and a second subcarrier orthogonal to the first subcarrier, used for transmission of a preamble of the fourth frame, the receiver receives the preambles of the third frame and the fourth frame transmitted via the first subcarrier and the second subcarrier specified by the second information from the first wireless terminal and the second wireless terminal, the preambles include any bit patterns for channel estimation,
and receives parts following the preambles of the third frame and the fourth frame in same frequency band.