Method and apparatus for resource determination, resource configuration, transmitting random access preamble and random access

A method performed by a base station in a wireless communication system, the method comprising:

• transmitting, to a user equipment (UE), system information including first information on a number of physical random access channel (PRACH) transmission occasions, and second information on a frequency offset for a lowest PRACH transmission occasion in a frequency domain with respect to a physical resource block (PRB) 0 of an initial uplink bandwidth part (UL BWP);
• and
• receiving, from the UE, a random access preamble on a PRACH transmission occasion,
• wherein, in case that the PRACH transmission occasion is associated with multiple synchronization signal blocks, a synchronization signal block of the multiple synchronization signal blocks is associated with a group of random access preambles,
• wherein the random access preamble is from the group of random access preambles, and
• wherein the PRACH transmission occasion is from the PRACH transmission occasions.

A user equipment (UE) in a wireless communication system, the UE comprising:

• a transceiver;
• and
• at least one processor coupled with the transceiver and configured to:
• receive, from a base station, system information including first information on a number of physical random access channel (PRACH) transmission occasions, and second information on a frequency offset for a lowest PRACH transmission occasion in a frequency domain with respect to a physical resource block (PRB) 0 of an initial uplink bandwidth part (UL BWP),
• select a PRACH transmission occasion from the PRACH transmission occasions,
• select a random access preamble from a group of random access preambles, and
• transmit, to the base station, the random access preamble based on the PRACH transmission occasion,
• wherein, in case that the PRACH transmission occasion is associated with multiple synchronization signal blocks, a synchronization signal block of the multiple synchronization signal blocks is associated with the group of random access preambles.

A base station in a wireless communication system, the base station comprising:

• a transceiver;
• and
• at least one processor coupled with the transceiver and configured to:
• transmit, to a user equipment (UE), system information including first information on a number of physical random access channel (PRACH) transmission occasions, and second information on a frequency offset for a lowest PRACH transmission occasion in a frequency domain with respect to a physical resource block (PRB) 0 of an initial uplink bandwidth part (UL BWP), and
• receive, from the UE, a random access preamble on a PRACH transmission occasion,
• wherein, in case that the PRACH transmission occasion is associated with multiple synchronization signal blocks, a synchronization signal block of the multiple synchronization signal blocks is associated with a group of random access preambles, wherein the PRACH transmission occasion is from the PRACH transmission occasions, and
• wherein the random access preamble is from the group of random access preambles.