Communication apparatus, base station, and communication method

1 . A communication apparatus comprising:

a receiver configured to:

receive, from a base station, a radio resource control (RRC) signaling including first information and second information, the first information being used for configuring a list of physical cell identifiers including a second physical cell identifier that is different from a first physical cell identifier of a serving cell, the second information being used for configuring a resource for a random access preamble transmission based on information used for indicating the second physical cell identifier, and

receive, from the base station, a downlink control information format used for a physical downlink control channel (PDCCH) order for indicating performing of a random access procedure;

a controller configured to:

perform the random access preamble transmission by using the resource configured based on the second information in a case where the information used for indicating the second physical cell identifier corresponding to the random access preamble transmission is included in the downlink control information format, the second physical cell identifier being included in the list of physical cell identifiers, and

perform the random access preamble transmission corresponding to the first physical cell identifier in a case where the information used for indicating the first physical cell identifier corresponding to the random access preamble transmission is included in the downlink control information format.

2 . The communication apparatus according to claim 1 , wherein

the receiver is configured to:

receive, from the base station, information used for configuring each of an identifier of a first timing advance group and an identifier of a second timing advance group, and

receive, from the base station, a random access response based on the random access preamble transmission; and

the controller is configured to control, based on a timing advance command corresponding to the second timing advance group included in the random access response, an alignment value of timing for an uplink transmission of the second timing advance group.

3 . The communication apparatus according to claim 1 , wherein

the receiver is configured to receive, from the base station, configuration information including the first information and information used for configuring SS/PBCH Block (SSB), and

the controller is configured to perform a measurement based on the information used for configuring the SSB.

4 . The communication apparatus according to claim 1 , wherein

the receiver is configured to receive on the serving cell, from the base station, the downlink control information including the information used for indicating the second physical cell identifier corresponding to the random access preamble transmission.

5 . A base station comprising:

a transmitter configured to:

transmit, to a communication apparatus, a radio resource control (RRC) signaling including first information and second information, the first information being used for configuring a list of physical cell identifiers including a second physical cell identifier that is different from a first physical cell identifier of a serving cell, the second information being used for configuring a resource for a random access preamble transmission based on information used for indicating the second physical cell identifier, and

transmit, to the communication apparatus, a downlink control information format used for a physical downlink control channel (PDCCH) order for indicating performing of a random access procedure;

a receiver configured to:

receive by using the resource configured based on the second information, from the communication apparatus, a random access preamble in a case where the information used for indicating the second physical cell identifier, corresponding to the random access preamble transmission is included in the downlink control information format, the second physical cell identifier being included in the list of physical cell identifiers, and

receive, from the communication apparatus, the random access preamble corresponding to the first physical cell identifier in a case where the information used for indicating the first physical cell identifier corresponding to the random access preamble transmission is included in the downlink control information format.

6 . The base station according to claim 5 , wherein

the transmitter is configured to:

transmit, to the communication apparatus, information used for configuring each of an identifier of a first timing advance group and an identifier of a second timing advance group, and

transmit, to the communication apparatus, a random access response based on the reception of the random access preamble, and

an alignment value of timing for an uplink transmission of the second timing advance group is controlled based on a timing advance command corresponding to the second timing advance group included in the random access response.

7 . The base station according to claim 5 , wherein

the transmitter is configured to transmit, to the communication apparatus, configuration information including the first information and information used for configuring SS/PBCH Block (SSB).

8 . The base station according to claim 5 , wherein

the transmitter is configured to transmit on the serving cell, to the communication apparatus, the downlink control information including the information used for indicating the second physical cell identifier corresponding to the random access preamble transmission.

9 . A communication method executed by a communication apparatus comprising the steps of:

receiving, from a base station, a radio resource control (RRC) signaling including first information and second information, the first information being used for configuring a list of physical cell identifiers including a second physical cell identifier that is different from a first physical cell identifier of a serving cell, the second information being used for configuring a resource for a random access preamble transmission based on information used for indicating the second physical cell identifier, and

receiving, from the base station, a downlink control information format used for a physical downlink control channel (PDCCH) order for indicating performing of a random access procedure;

performing the random access preamble transmission by using the resource configured based on the second information in a case where the information used for indicating the second physical cell identifier corresponding to the random access preamble transmission is included in the downlink control information format, the second physical cell identifier being included in the list of physical cell identifiers; and

performing the random access preamble transmission corresponding to the first physical cell identifier in a case where the information used for indicating the first physical cell identifier corresponding to the random access preamble transmission is included in the downlink control information format.

10 . The communication method according to claim 9 , further comprising:

receiving, from the base station, information used for configuring each of an identifier of a first timing advance group and an identifier of a second timing advance group,

receiving, from the base station, a random access response based on the random access preamble transmission, and

controlling, based on a timing advance command corresponding to the second timing advance group included in the random access response, an alignment value of timing for an uplink transmission of the second timing advance group.

11 . The communication method according to claim 9 , further comprising:

receiving, from the base station, configuration information including the first information and information used for configuring SS/PBCH Block (SSB), and

performing a measurement based on the information used for configuring the SSB.

12 . The communication method according to claim 9 , wherein

in the step of receiving the downlink control information format, the downlink control information including the information used for indicating the second physical cell identifier corresponding to the random access preamble transmission is received from the base station on the serving cell.