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US 12,598,652 B2Granted
User equipment and control method
AssigneeNtt Docomo, Inc.
InventorTomoya Ohara
Life of this patent
Estimating the term…
Abstract
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.
Claims5
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.
4 more elements
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 more elements
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.
4 more elements
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.
9 more elements
Dependencies are inferred from the claim text.