US 12,244,527 B2
User terminal and radio communication method
Kazuaki Takeda, Tokyo (JP); Satoshi Nagata, Tokyo (JP); Chongning Na, Beijing (CN); and Yuichi Kakishima, Palo Alto, CA (US)
Assigned to NTT DOCOMO, INC., Tokyo (JP)
Appl. No. 16/483,136
Filed by NTT DOCOMO, INC., Tokyo (JP)
PCT Filed Feb. 2, 2018, PCT No. PCT/JP2018/003542
§ 371(c)(1), (2) Date Aug. 2, 2019,
PCT Pub. No. WO2018/143391, PCT Pub. Date Aug. 9, 2018.
Claims priority of application No. 2017-018950 (JP), filed on Feb. 3, 2017.
Prior Publication US 2020/0244413 A1, Jul. 30, 2020
Int. Cl. H04L 5/00 (2006.01); H04B 7/06 (2006.01); H04W 16/28 (2009.01); H04W 24/10 (2009.01); H04W 36/08 (2009.01); H04W 72/23 (2023.01); H04W 74/00 (2009.01); H04W 74/0833 (2024.01)
CPC H04L 5/0048 (2013.01) [H04B 7/0695 (2013.01); H04W 16/28 (2013.01); H04W 24/10 (2013.01); H04W 36/085 (2023.05); H04W 72/23 (2023.01); H04W 74/004 (2013.01); H04W 74/0833 (2013.01)] 7 Claims
OG exemplary drawing
 
7. A radio communication system comprising a terminal and a base station, wherein:
the terminal comprises:
a first processor that detects a beam failure based on reception power of a synchronization block (SSB); and
a first transmitter that transmits an uplink (UL) signal that requires beam recovery in response to detection of the beam failure,
wherein the first transmitter transmits the UL signal using a UL resource having an association with an SSB of a candidate beam,
wherein the first processor controls reception of a response signal to the UL signal based on the SSB of the candidate beam, and
wherein information representing the association between the UL resource and the SSB of the candidate beam is signaled by higher layer signaling, and
the base station comprises;
a second transmitter that transmits the SSB; and
a second processor that controls reception of the UL signal that requires beam recovery from the terminal,
wherein the UL signal is received using the UL resource having the association with the SSB of the candidate beam, and
wherein the second transmitter transmits the response signal to the UL signal based on the SSB of the candidate beam.