Terminal and radio communication method
A terminal repeatedly transmits a message in a random access channel procedure, and configures a random access resource according to whether the repeated transmission is present, based on configuration of a radio resource control layer.
1 . A terminal comprising:
a receiver that receives, via a radio resource control layer, configuration information including a first index corresponding to a first preamble for another terminal that does not support repeated transmission of a physical uplink shared channel (PUSCH) in a random access procedure, a second index corresponding to a second preamble, which is different from the first preamble, for the terminal that supports the repeated transmission of the PUSCH in the random access procedure and the number of the second preambles;
a processor that determines transmission of the second preamble based on the second index and the number of the second preambles; and
a transmitter that performs the repeated transmission of the PUSCH after transmitting the second preamble,
wherein the processor determines a threshold of an RSRP based on a configuration of the radio resource control layer, and determines whether to perform the repeated transmission of the PUSCH based on whether a received quality of a downlink signal exceeds the threshold of the RSRP, and
wherein the repeated transmission of the PUSCH is scheduled by downlink control information format 0_0 associated with a temporary identifier for the random access procedure.
2 . The terminal according to claim 1 , wherein the second index is a start index of the second preamble.
3 . A radio communication system comprising a base station and a terminal, wherein
the base station comprises a transmitter that transmits, via a radio resource control layer, configuration information including a first index corresponding to a first preamble for another terminal that does not support repeated transmission of a physical uplink shared channel (PUSCH) in a random access procedure, a second index corresponding to a second preamble, which is different from the first preamble, for the terminal that supports the repeated transmission of the PUSCH in the random access procedure and the number of the second preambles, and
the terminal comprises:
a receiver that receives the configuration information;
a processor that determines transmission of the second preamble based on the second index and the number of the second preambles; and
a transmitter that performs the repeated transmission of the PUSCH after transmitting the second preamble,
wherein the processor determines a threshold of an RSRP based on a configuration of the radio resource control layer, and determines whether to perform the repeated transmission of the PUSCH based on whether a received quality of a downlink signal exceeds the threshold of the RSRP, and
wherein the repeated transmission of the PUSCH is scheduled by downlink control information format 0_0 associated with a temporary identifier for the random access procedure.
4 . A radio communication method performed by a terminal, comprising:
receiving, via a radio resource control layer, configuration information including a first index corresponding to a first preamble for another terminal that does not support repeated transmission of a physical uplink shared channel (PUSCH) in a random access procedure, a second index corresponding to a second preamble, which is different from the first preamble, for the terminal that supports the repeated transmission of the PUSCH in the random access procedure and the number of the second preambles;
determining transmission of the second preamble based on the second index and the number of the second preambles;
determining a threshold of an RSRP based on a configuration of the radio resource control layer;
determining whether to perform the repeated transmission of the PUSCH based on whether a received quality of a downlink signal exceeds the threshold of the RSRP; and
performing the repeated transmission of the PUSCH after transmitting the second preamble,
wherein the repeated transmission of the PUSCH is scheduled by downlink control information format 0_0 associated with a temporary identifier for the random access procedure.