US 12,149,285 B2
Optical wireless communication system and optical wireless communication method
Kazumitsu Sakamoto, Musashino (JP); Yohei Katayama, Musashino (JP); Kento Yoshizawa, Musashino (JP); Takeshi Kinoshita, Musashino (JP); Etsushi Yamazaki, Musashino (JP); Takayuki Mizuno, Musashino (JP); and Takuya Ohara, Musashino (JP)
Assigned to NIPPON TELEGRAPH AND TELEPHONE CORPORATION, Tokyo (JP)
Appl. No. 18/008,473
Filed by NIPPON TELEGRAPH AND TELEPHONE CORPORATION, Tokyo (JP)
PCT Filed Jun. 12, 2020, PCT No. PCT/JP2020/023234
§ 371(c)(1), (2) Date Dec. 6, 2022,
PCT Pub. No. WO2021/250895, PCT Pub. Date Dec. 16, 2021.
Prior Publication US 2023/0208521 A1, Jun. 29, 2023
Int. Cl. H04B 10/112 (2013.01); H04B 10/079 (2013.01); H04B 10/114 (2013.01)
CPC H04B 10/1143 (2013.01) [H04B 10/0795 (2013.01); H04B 10/1123 (2013.01)] 7 Claims
OG exemplary drawing
 
1. An optical wireless communication system comprising:
an optical wireless communication apparatus configured to move along with a first optical wireless station; and
a second optical wireless station opposed to the first optical wireless station, wherein
the optical wireless communication apparatus includes
at least one reference light transmitter configured to transmit reference light to the second optical wireless station with a position in front in a moving direction of the first optical wireless station defined as a transmission position,
the second optical wireless station includes
a reference light receiver configured to receive the reference light transmitted from the at least one reference light transmitter,
an estimator configured to estimate an influence of atmospheric air on transmission of signal light based on a reception state of the reference light received by the reference light receiver,
a compensator configured to perform compensation processing on the signal light based on the influence of the atmospheric air estimated by the estimator, and
a signal light transmitter configured to transmit the signal light on which the compensation processing has been performed by the compensator in a direction of the transmmission position,
wherein the first optical wireless station is configured to receive the signal light transmitted by the second optical wireless station,
wherein optical wireless communciation apparatus is configured to define, as the transmission position, a position at a distance by which the first optical wireless station moves in a round-trip propagation time of light between the first optical wireless station and the second optical wireless station in front in the moving direction of the first optical wireless station.