Terminal apparatus, base station apparatus, and communication method for transmitting resource information and transmission power control information to the terminal device with a grant-free access resource allocation or a scheduled access resource allocation
To improve throughput in a communication environment in which a large number of terminal apparatuses access, a receiver receives information indicating whether a radio resource allocated by a base station apparatus is a grant free access resource or a scheduled access resource, as well as transmission power control information in the scheduled access resource and transmission power control information in the grant free access resource; and a transmitter configured to transmit a transmission signal to the base station apparatus. In a case of communicating by using the scheduled access resource, a transmission power control is performed based on the first transmission power control information to transmit the transmission signal. In a case of communicating by using the grant-free access resource, the transmission power control is performed based on the second transmission power control information to transmit the transmission signal.
1. A terminal apparatus for communicating with a base station apparatus, the terminal apparatus comprising:
a receiver configured to receive first radio resource control (RRC) information for indicating a first resource, second RRC information for indicating a second resource, first transmission power control information and second transmission power control information that are for transmitting an uplink shared channel; and
a transmitter configured to transmit a transmission signal to the base station apparatus by using the first resource or the second resource, wherein
the first resource is one part of frequency resources in a first serving cell,
the second resource is another part of the frequency resources in a second serving cell,
the first RRC information and the second RRC information are configured in advance by the base station apparatus,
in a case of communicating by using the first resource, a transmission power control is performed based on the first transmission power control information to transmit the transmission signal,
in a case of communicating by using the second resource, the transmission power control is performed based on the second transmission power control information to transmit the transmission signal, and
the terminal apparatus is configured to communicate with the base station apparatus by using a plurality of serving cells in a carrier aggregation,
the plurality of serving cells include a primary cell and at least a secondary cell, and
the first serving cell is the primary cell and the second serving cell is the secondary cell.
2. The terminal apparatus according to claim 1 , wherein
the first transmission power control information includes a transmission power value or a transmission power control parameter, and in a case that the transmission power value is included, a transmission is performed at the transmission power, and in a case that the transmission power control parameter is included, the transmission is performed at a transmission power calculated based on the transmission power control parameter.
3. The terminal apparatus according to claim 1 , wherein
in a case of communicating by using the second resource, a transmission is performed at a transmission power obtained by adding a random power offset to a power calculated based on a transmission control parameter included in the second transmission power control information.
4. The terminal apparatus according to claim 1 , wherein
in a case of communicating by using the second resource, a power headroom is calculated that is a difference between a maximum transmission power and a transmission power calculated based on a transmission power control parameter included in the second transmission power control information, and in a case that the power headroom has a negative value, the terminal apparatus requests a scheduled access to the base station apparatus.
5. A base station apparatus for communicating with a terminal apparatus, the base station apparatus comprising:
a transmitter configured to transmit first radio resource control (RRC) information for indicating a first resource, second RRC information for indicating a second resource, first transmission power control information and second transmission power control information that are for transmitting an uplink shared channel; and
a receiver configured to receive a signal from the terminal apparatus by using the first resource or the second resource, wherein
the first resource is one part of frequency resources in a first serving cell,
the second resource is another part of the frequency resources in a second serving cell,
the first RRC information and the second RRC information are configured in advance,
by using the first resource, the signal subjected to a transmission power control based on the first transmission power control information is received,
by using the second resource, the signal subjected to the transmission power control based on the second transmission power control information is received, and
the base station apparatus is configured to communicate with the terminal apparatus by using a plurality of serving cells in a carrier aggregation,
the plurality of serving cells include a primary cell and at least a secondary cell, and
the first serving cell is the primary cell and the second serving cell is the secondary cell.
6. The base station apparatus according to claim 5 , wherein
the first transmission power control information includes a transmission power value or a transmission power control parameter, and in a case that the transmission power value is included, the signal transmitted at the transmission power is received, and in a case that the transmission power control parameter is included, the signal transmitted at a transmission power calculated based on the transmission power control parameter is received.
7. The base station apparatus according to claim 5 , wherein,
by using the second resource, the base station apparatus receives the signal transmitted at a transmission power obtained by adding a random power offset to a power calculated based on a transmission control parameter included in the second transmission power control information.
8. A communication method of a terminal apparatus for communicating with a base station apparatus, the method comprising steps of:
receiving first radio resource control (RRC) information for indicating a first resource, second RRC information for indicating a second resource, first transmission power control information and second transmission power control information that are for transmitting an uplink shared channel; and
transmitting a transmission signal to the base station apparatus by using the first resource or the second resource, wherein
the first resource is one part of frequency resources in a first serving cell,
the second resource is another part of the frequency resources in a second serving cell,
the first RRC information and the second RRC information are configured in advance by the base station apparatus,
in a case of communicating by using the first resource, a transmission power control is performed based on the first transmission power control information to transmit the transmission signal, and
in a case of communicating by using the second resource, the transmission power control is performed based on the second transmission power control information to transmit the transmission signal and
the terminal apparatus is configured to communicate with the base station apparatus by using a plurality of serving cells in a carrier aggregation,
the plurality of serving cells include a primary cell and at least a secondary cell, and
the first serving cell is the primary cell and the second serving cell is the secondary cell.
9. A communication method of a base station apparatus for communicating with a terminal apparatus, the method comprising steps of:
transmitting first radio resource control (RRC) information for indicating a first resource, second RRC information for indicating a second resource, first transmission power control information and second transmission power control information that are for transmitting for transmitting an uplink shared channel; and
receiving a signal from the terminal apparatus by using the first resource or the second resource, wherein
the first resource is one part of frequency resources in a first serving cell,
the second resource is another part of the frequency resources in a second serving cell,
the first RRC information and the second RRC information are configured in advance,
by using the first resource, the signal subjected to a transmission power control based on the first transmission power control information is received,
by using the second resource, the signal subjected to the transmission power control based on the second transmission power control information is received, and
the base station apparatus is configured to communicate with the terminal apparatus by using a plurality of serving cells in a carrier aggregation,
the plurality of serving cells include a primary cell and at least a secondary cell, and
the first serving cell is the primary cell and the second serving cell is the secondary cell.