Communication method, terminal device, and network device

A terminal device, comprising:

• a processor, configured to acquire a target Physical Random Access Channel (PRACH) resource set, wherein the target PRACH resource set comprises at least one resource set of a first PRACH resource set and a second PRACH resource set, and at least one resource of the first PRACH resource set and at least one resource of the second PRACH resource set are different;
• wherein
• the processor is further configured to determine a target PRACH resource from the target PRACH resource set, wherein the target PRACH resource is used for PRACH sending in a random access procedure;
• wherein when the target PRACH resource set comprises the second PRACH resource set, the terminal device further comprises:
• a communication unit, configured to receive first indication information sent by a network device, wherein the first indication information is used for determining a second PRACH resource set configuration within a first time period;
• the processing unit is specifically configured to:
• determine a second PRACH resource set within the first time period according to the second PRACH resource set configuration within the first time period;
• wherein the first time period is one transmission opportunity after the network device preempts a channel following a principle of Listen Before Talk (LBT).

A network device, comprising:

• a processor, configured to determine a first PRACH resource set and a second PRACH resource set, wherein at least one resource of the first PRACH resource set and at least one resource of the second PRACH resource set are different;
• and
• the processor is further configured to detect a random access preamble sequence on at least one first PRACH resource in the first PRACH resource set and at least one second PRACH resource in the second PRACH resource set;
• wherein the network device further comprises:
• a transceiver, configured to send first indication information to a terminal device, wherein the first indication information is used for determining a second PRACH resource set configuration within a first time period;
• wherein the first time period is one transmission opportunity after the network device preempts a channel following a principle of Listen Before Talk (LBT).