US 11,863,261 B2
Base station and base station communication method
Nobuhide Nonaka, Tokyo (JP); Tatsuki Okuyama, Tokyo (JP); Satoshi Suyama, Tokyo (JP); and Yukihiko Okumura, Tokyo (JP)
Assigned to NTT DOCOMO, INC., Tokyo (JP)
Appl. No. 17/603,144
Filed by NTT DOCOMO, INC., Tokyo (JP)
PCT Filed Dec. 23, 2019, PCT No. PCT/JP2019/050348
§ 371(c)(1), (2) Date Oct. 12, 2021,
PCT Pub. No. WO2020/217586, PCT Pub. Date Oct. 29, 2020.
Claims priority of application No. 2019-085355 (JP), filed on Apr. 26, 2019.
Prior Publication US 2022/0200672 A1, Jun. 23, 2022
Int. Cl. H04B 7/0456 (2017.01); H04B 7/08 (2006.01); H04W 72/044 (2023.01); H04W 72/21 (2023.01)
CPC H04B 7/0456 (2013.01) [H04B 7/08 (2013.01); H04W 72/046 (2013.01); H04W 72/21 (2023.01)] 5 Claims
OG exemplary drawing
 
1. A base station, comprising:
a processor that assigns a common downlink reference signal to a plurality of beams based on a Doppler shift estimated using an uplink reference signal; and
a transmitter that transmits the common downlink reference signal in the plurality of beams,
wherein the processor assigns a separate downlink reference signal different from the common downlink reference signal to one or more beams different from the plurality of beams.