US 12,244,368 B2
Reflection direction control method, reflection direction control system, reflection direction control device, and reflection direction control program
Riku Omiya, Musashino (JP); Masashi Iwabuchi, Musashino (JP); Tomoki Murakami, Musashino (JP); Tomoaki Ogawa, Musashino (JP); and Yasushi Takatori, Musashino (JP)
Assigned to NIPPON TELEGRAPH AND TELEPHONE CORPORATION, Tokyo (JP)
Appl. No. 18/017,480
Filed by NIPPON TELEGRAPH AND TELEPHONE CORPORATION, Tokyo (JP)
PCT Filed Jul. 28, 2020, PCT No. PCT/JP2020/028906
§ 371(c)(1), (2) Date Jan. 23, 2023,
PCT Pub. No. WO2022/024223, PCT Pub. Date Feb. 3, 2022.
Prior Publication US 2023/0275624 A1, Aug. 31, 2023
Int. Cl. H04B 7/0413 (2017.01); H04B 7/14 (2006.01)
CPC H04B 7/0413 (2013.01) [H04B 7/14 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A reflection direction control method comprising:
an arrival direction estimation step of estimating an arrival direction of radio waves transmitted by a wireless terminal to one or more reflection units each including a plurality of reflection elements capable of dynamically changing phase characteristics when the radio wave is reflected;
a phase control step of controlling a phase of a radio wave reflected by each of the plurality of reflection elements so that the reflection unit reflects, in a predetermined direction, the radio wave transmitted from the estimated arrival direction; and
a switching step of switching between an antenna mode in which the reflection unit is caused to receive the radio wave of which the arrival direction is estimated and a reflection mode in which the reflection unit is caused to reflect the radio wave;
wherein, when switching to the reflection mode is performed in the switching step, the reflection unit reflects a radio wave at a frequency different from that when the switching unit performs switching to the antenna mode.