Method performed by user equipment, and user equipment

A method performed by a user equipment (UE) for wireless communication, the method comprising:

• transmitting a random access preamble;
• and
• instructing, by a higher layer of the UE, a physical layer to retransmit the random access preamble if the UE does not detect, in a random access response (RAR) window, a downlink control information (DCI) format 1_0 with a cyclic redundancy check (CRC) scrambled with a random access radio network temporary identifier (RA-RNTI), or if the UE does not correctly receive, in the RAR window, a transport block in a physical downlink shared channel (PDSCH) scheduled by the DCI format 1_0, or if the UE does not identify a random access preamble identity (RAPID), wherein:
• a time for the UE to retransmit the random access preamble is no later than a first time after a last symbol of the RAR window or a first time after a last symbol of a PDSCH reception,
• the first time is determined according to a duration of N1 symbols,
• N1 is an integer, and
• a value of N1 corresponds to at least one of the following:
• a physical downlink shared channel (PDSCH) decoding time defined by PDSCH processing capability 1 when a reference processing capability assumption is true,
• a PDSCH decoding time defined by the PDSCH processing capability 1 when a PDSCH demodulation reference signal (DM-RS) is configured, the PDSCH decoding time is determined based on a minimum subcarrier spacing (SCS) among a SCS of a physical downlink control channel (PDCCH) carrying the DCI format 1_0, a SCS of a corresponding PDSCH when the PDSCH DM-RS is configured, and a SCS of the random access preamble, and N1 is 14 when the minimum SCS is 15 kHz.

A method performed by a user equipment for wireless communication, the method comprising:

• receiving a random access response (RAR) uplink grant included in an RAR message on a physical downlink shared channel (PDSCH);
• and
• transmitting a physical uplink shared channel (PUSCH) scheduled by the received RAR uplink grant, wherein:
• a minimum time between a last symbol of the PDSCH reception and the first symbol of the PUSCH transmission is determined according to a duration of N1 symbols, and
• a value of N1 corresponds to at least one of the following:
• a physical downlink shared channel (PDSCH) decoding time defined by PDSCH processing capability 1 when a reference processing capability assumption is true,
• a PDSCH decoding time defined by the PDSCH processing capability 1 when a PDSCH demodulation reference signal (DM-RS) is configured, the PDSCH decoding time is determined based on a minimum subcarrier spacing (SCS) among SCSs of the PDSCH and the PUSCH, and N1 is 14 when the minimum SCS is 15 kHz.

A user equipment (UE) for wireless communication, the UE comprising:

• a processor;
• and
• a memory, storing instructions, wherein the processor is configured to execute the instructions to:
• receive a timing advance command in uplink slot n;
• and
• determine, according to a time when the timing advance command is received, a time for applying an uplink transmission timing adjustment starting from a start of uplink slot n+k+1,
• wherein:
• k is determined according to a duration of N1 symbols;
• n, k, and N1 are all integers;
• and
• a value of N1 corresponds to at least one of the following:
• a physical downlink shared channel (PDSCH) decoding time defined by PDSCH processing capability 1 when a reference processing capability assumption is true;
• a PDSCH decoding time defined by the PDSCH processing capability 1 when a PDSCH demodulation reference signal (DM-RS) is configured, the PDSCH decoding time is determined based on a minimum subcarrier spacing (SCS) among SCSs of all configured uplink bandwidth parts (BWPs) for all uplink carriers in a timing advance group (TAG) and of all configured downlink BWPs for corresponding downlink carriers, and N1 is 14 when the minimum SCS is 15 kHz.