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US 11,444,676 B2Granted
User terminal and radio communication method
AssigneeNtt Docomo, Inc.
InventorsKazuki Takeda, Satoshi Nagata, Lihui Wang, Chongning Na, Xiaolin Hou
Life of this patent
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Abstract
To perform a beam failure recovery procedure by using an appropriate radio resource, a user terminal includes a transmitting section that transmits a beam failure recovery request, and a control section that controls transmission of the beam failure recovery request by using at least one of an uplink shared channel, an uplink control channel, a sounding reference signal, and a random access channel indicated by a downlink control channel.
Claims4
A terminal comprising:
- a processor that detects a beam failure in a secondary cell;
- and
- a transmitter that transmits a beam failure recovery request by using a scheduling request (SR), applicable for beam failure recovery on the secondary cell, on a physical uplink control channel, based on a configuration of the physical uplink control channel for the beam failure recovery by higher layer signaling, and transmits on a physical uplink shared channel, a Medium Access Control Control Element (MAC CE) including a reference signal ID corresponding to a candidate beam.
A radio communication method for a terminal, comprising:
- detecting a beam failure in a secondary cell;
- transmitting a beam failure recovery request by using a scheduling request (SR), applicable for beam failure recovery on the secondary cell, on a physical uplink control channel, based on a configuration of the physical uplink control channel for the beam failure recovery by higher layer signaling;
- and
- transmitting on a physical uplink shared channel, a Medium Access Control Control Element (MAC CE) including a reference signal ID corresponding to a candidate beam.
1 more element
A system comprising a terminal and a base station, wherein
- the terminal comprises:
- a processor that detects a beam failure in a secondary cell;
- and
- a transmitter that transmits a beam failure recovery request by using a scheduling request (SR), applicable for beam failure recovery on the secondary cell, on a physical uplink control channel, based on a configuration of the physical uplink control channel for the beam failure recovery by higher layer signaling, and transmits on a physical uplink shared channel, a Medium Access Control Control Element (MAC CE) including a reference signal ID corresponding to a candidate beam, and
- the base station comprises:
- a receiver that receives the beam failure recovery request and the MAC CE.
3 more elements
Dependencies are inferred from the claim text.