User terminal, base station, and communication apparatus
AssigneeKYOCERA Corporation
InventorsNaohisa MATSUMOTO, Takahiro SAIWAI, Kugo MORITA
Life of this patent
Estimating the term…
Abstract
A user terminal according to first to third embodiments is used in a mobile communication system defined to observe a use state of an unlicensed band channel within an observation period before transmitting an uplink signal within an uplink transmission period in the channel. The user terminal includes a controller configured to perform transmission restriction to restrict transmission of the uplink signal during a last fixed section or a first fixed section of the uplink transmission period when transmitting the uplink signal within the uplink transmission period in the channel.
Claims6
A user terminal in a mobile communication system, comprising:
- a transmitter configured to transmit an uplink signal within an uplink subframe allocated by a base station, to the base station, in an unlicensed band;
- a receiver configured to receive, from the base station, a first instruction that instruct to stop of transmission of the uplink signal in a last symbol of the uplink subframe;
- and
- a controller configured to stop of transmission of the uplink signal in the last symbol of the uplink subframe, in response to receiving the first instruction.
A base station in a mobile communication system, comprising:
- a receiver configured to receive an uplink signal within an uplink subframe allocated by the base station, from a user terminal, in an unlicensed band;
- and
- a transmitter configured to transmit, to the user terminal, a first instruction that instruct to stop of transmission of the uplink signal in a last symbol of the uplink subframe.
A communication control method in a mobile communication system, comprising:
- allocating, by a base station, an uplink subframe used by a user terminal to transmit an uplink subframe in an unlicensed band;
- transmitting, from the base station to the user terminal, a first instruction that instruct to stop of transmission of the uplink signal in a last symbol of the uplink subframe;
- transmitting, from the user terminal to the base station, an uplink signal within the uplink subframe, in an unlicensed band;
- and
- stopping of transmission of the uplink signal in the last symbol within the uplink subframe, in response to receiving the first instruction.
Dependencies are inferred from the claim text.