US 12,395,872 B2
Radio communication method, radio communication system, radio base station, and reflector
Masashi Iwabuchi, Musashino (JP); Tomoaki Ogawa, Musashino (JP); and Tomoki Murakami, Musashino (JP)
Assigned to NIPPON TELEGRAPH AND TELEPHONE CORPORATION, Tokyo (JP)
Appl. No. 17/922,080
Filed by NIPPON TELEGRAPH AND TELEPHONE CORPORATION, Tokyo (JP)
PCT Filed May 27, 2020, PCT No. PCT/JP2020/020991
§ 371(c)(1), (2) Date Oct. 28, 2022,
PCT Pub. No. WO2021/240699, PCT Pub. Date Dec. 2, 2021.
Prior Publication US 2023/0171624 A1, Jun. 1, 2023
Int. Cl. H04W 24/08 (2009.01); H04W 16/26 (2009.01)
CPC H04W 24/08 (2013.01) [H04W 16/26 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A radio communication method of performing communication between
a radio base station and a radio terminal via a reflector,
wherein the radio base station is configured to form a transmission beam and transmit a signal by the transmission beam,
the reflector is configured to reflect the signal transmitted from the radio base station, the radio terminal is configured to receive the signal reflected by the reflector, and the radio communication method comprises:
measurement signal transmission processing that transmits a measurement signal including a beam ID of the transmission beam from the radio base station, the measurement signal being for measuring a quality of communication between the radio base station and the radio terminal;
measurement signal reflection processing that reflects the measurement signal incident on the reflector in a plurality of reflection directions to generate a plurality of reflected measurement signals, and modulates the incident measurement signal during reflection to add information about a reflection direction ID to each of the plurality of reflected measurement signals, the reflection direction ID being different for each of the plurality of reflection directions; and
communication quality evaluation processing that, by the radio terminal, demodulates a reflected measurement signal received from the reflector to acquire the reflection direction ID and the beam ID, and evaluates the quality of communication for each combination of the beam ID and the reflection direction ID based on a reception state of the received reflected measurement signal;
wherein the measurement signal includes the beam ID and does not include the reflection direction ID.