Random access method, apparatus, and system

A communications apparatus, comprising at least one processor and a transceiver;

• wherein the at least one processor is configured to:
• receive, via the transceiver from a network device, information about a physical random access channel (PRACH) resource set and information about one or more physical uplink shared channel (PUSCH) resources associated with each PRACH resource in the PRACH resource set, wherein each PUSCH resource associated with each PRACH resource is associated with one preamble sequence set;
• and
• upon determination that a first PUSCH resource associated with a valid first PRACH resource in the PRACH resource set is valid, send a first preamble sequence to the network device on the first PUSCH resource via the transceiver, and send uplink data to the network device on the first PUSCH resource via the transceiver, wherein the first preamble sequence is in a preamble sequence set associated with the first PUSCH resource,
• wherein validity of the first PUSCH resource associated with the valid first PRACH resource is determined by the communications apparatus based on at least one time unit occupied by the first PUSCH resource.

A communications apparatus, comprising at least one processor and a transceiver;

• the at least one processor is configured to:
• send, to a terminal device via the transceiver, information about a physical random access channel (PRACH) resource set and information about one or more physical uplink shared channel (PUSCH) resources associated with each PRACH resource in the PRACH resource set, wherein each PUSCH resource associated with each PRACH resource is associated with one preamble sequence set;
• and
• upon determination that a first PUSCH resource associated with a valid first PRACH resource in the PRACH resource set is valid, receive a first preamble sequence from the terminal device on the first PRACH resource via the transceiver, and receive uplink data from the terminal device on the first PUSCH resource via the transceiver, wherein the first preamble sequence is in a preamble sequence set associated with the first PUSCH resource,
• wherein the validity of the first PUSCH resource associated with the valid first PRACH resource is determined by the terminal device based on at least one time unit occupied by the first PUSCH resource.

A non-transitory computer-readable storage medium, comprising instructions, that when run on a communications apparatus, cause the communications apparatus to perform operations comprising:

• receiving, from a network device, information about a physical random access channel (PRACH) resource set and information about one or more physical uplink shared channel (PUSCH) resources associated with each PRACH resource in the PRACH resource set, wherein each PUSCH resource associated with each PRACH resource is associated with one preamble sequence set;
• and
• upon determination that a first PUSCH resource associated with a valid first PRACH resource in the PRACH resource set is valid, sending a first preamble sequence to the network device on the first PRACH resource, and sending uplink data to the network device on the first PUSCH resource, wherein the first preamble sequence is in a preamble sequence set associated with the first PUSCH resource,
• wherein validity of the first PUSCH resource associated with the valid first PRACH resource is determined by the communication apparatus based on at least one time unit occupied by the first PUSCH resource.