User equipment and control method
A user equipment includes a receiving unit configured to receive, from a base station apparatus, an instruction designating a method in which a random access procedure is performed, and includes a control unit configured to determine, in accordance with the instruction, whether to execute a random access procedure of a method in which a first message is transmitted using a preamble resource and a PUSCH resource.
1 . A terminal comprising:
a receiver configured to receive configuration information on a random access procedure; and
a processor configured to execute a two-step random access procedure when the configuration information includes information explicitly indicating the two-step random access procedure, and to execute a four-step random access procedure when the configuration information includes information explicitly indicating the four-step random access procedure,
wherein the receiver receives, from a base station, the configuration information relating to a number of synchronization signal blocks (SSBs) for the two-step random access procedure and the configuration information relating to a number of SSBs for the four-step random access procedure separately,
wherein the processor is configured to determine whether to execute the two-step random access procedure or to execute the four-step random access procedure in accordance with determining that the configuration information relates to which one of the number of SSBs for the two-step random access procedure or the number of SSBs for the four-step random access procedure,
wherein the processor determines to execute the two-step random access procedure in response to a Reference Signal Received Power (RSRP) measurement result of a DL signal being above a threshold and to execute the four-step random access procedure in response to the RSRP measurement result of the DL signal being below the threshold, and
wherein the configuration information for the two-step random access procedure includes a preamble index set for the two-step random access procedure, and the configuration information for the four-step random access procedure includes a preamble index set for the four-step random access procedure.
2 . The terminal as claimed in claim 1 , wherein the configuration information for the two-step random access procedure includes a PRACH occasion for the two-step random access procedure, and the configuration information for the four-step random access procedure includes a PRACH occasion for the four-step random access procedure.
3 . A communication method executed by a terminal, comprising:
receiving configuration information on a random access procedure;
executing a two-step random access procedure when the configuration information includes information explicitly indicating the two-step random access procedure, and executing a four-step random access procedure when the configuration information includes information explicitly indicating the four-step random access procedure,
wherein the terminal receives, from a base station, the configuration information relating to a number of synchronization signal blocks (SSBs) for the two-step random access procedure and the configuration information relating to a number of SSBs for the four-step random access procedure separately;
determining whether to execute the two-step random access procedure or to execute the four-step random access procedure in accordance with determining that the configuration information relates to which one of the number of SSBs for the two-step random access procedure or the number of SSBs for the four-step random access procedure; and
determining to execute the two-step random access procedure in response to a Reference Signal Received Power (RSRP) measurement result of a DL signal being above a threshold and to execute the four-step random access procedure in response to the RSRP measurement result of the DL signal being below the threshold,
wherein the configuration information for the two-step random access procedure includes a preamble index set for the two-step random access procedure, and the configuration information for the four-step random access procedure includes a preamble index set for the four-step random access procedure.
4 . A base station comprising:
a transmitter configured to transmit configuration information on a random access procedure; and
a processor configured to execute a two-step random access procedure when the configuration information includes information explicitly indicating the two-step random access procedure, and to execute a four-step random access procedure when the configuration information includes information explicitly indicating the four-step random access procedure,
wherein the transmitter transmits, to the terminal, the configuration information relating to a number of synchronization signal blocks (SSBs) for the two-step random access procedure and the configuration information relating to a number of SSBs for the four-step random access procedure separately,
wherein the processor configures the terminal to determine whether to execute the two-step random access procedure or to execute the four-step random access procedure in accordance with the configuration information being related to which one of the number of SSBs for the two-step random access procedure or the number of SSBs for the four-step random access procedure,
wherein the processor configures the terminal to execute the two-step random access procedure in response to a Reference Signal Received Power (RSRP) measurement result of a DL signal being above a threshold and to execute the four-step random access procedure in response to the RSRP measurement result of the DL signal being below the threshold, and
wherein the configuration information for the two-step random access procedure includes a preamble index set for the two-step random access procedure, and the configuration information for the four-step random access procedure includes a preamble index set for the four-step random access procedure.
5 . A communication system comprising a base station and a terminal,
the base station comprising:
a transmitter configured to transmit configuration information on a random access procedure; and
a processor configured to execute a two-step random access procedure when the configuration information includes information explicitly indicating the two-step random access procedure, and to execute a four-step random access procedure when the configuration information includes information explicitly indicating the four-step random access procedure, and
the terminal comprising:
a receiver configured to receive the configuration information on a random access procedure; and
a processor configured to execute a two-step random access procedure when the configuration information includes information explicitly indicating the two-step random access procedure, and to execute a four-step random access procedure when the configuration information includes information explicitly indicating the four-step random access procedure,
wherein the receiver receives, from the base station, the configuration information relating to a number of synchronization signal blocks (SSBs) for the two-step random access procedure and the configuration information relating to a number of SSBs for the four-step random access procedure separately,
wherein the processor of the terminal is configured to determine whether to execute the two-step random access procedure or to execute the four-step random access procedure in accordance with determining that the configuration information relates to which one of the number of SSBs for the two-step random access procedure or the number of SSBs for the four-step random access procedure,
wherein the processor of the terminal determines to execute the two-step random access procedure in response to a Reference Signal Received Power (RSRP) measurement result of a DL signal being above a threshold and to execute the four-step random access procedure in response to the RSRP measurement result of the DL signal being below the threshold, and
wherein the configuration information for the two-step random access procedure includes a preamble index set for the two-step random access procedure, and the configuration information for the four-step random access procedure includes a preamble index set for the four-step random access procedure.