Random access method and related device

A random access method, applied to a network side device and comprising:

• receiving a first message transmitted by a terminal device;
• and
• transmitting, to the terminal device, a response message that comprises target configuration information;
• wherein
• there is an association relationship between at least some configuration information in the target configuration information and an association parameter, and the association parameter is a parameter that can be obtained by the terminal device before the terminal device receives the response message;
• wherein the first message is an Msg1 in a 2-step random access procedure, and the response message is an Msg2 in the 2-step random access procedure;
• the target configuration information comprises uplink resource allocation information used to indicate a transmission resource for a feedback message of the Msg2;
• wherein after the transmitting, to the terminal device, the response message that comprises target configuration information, the method further comprises:
• receiving the feedback message for the Msg2 and that is transmitted by the terminal device after the terminal device successfully receives the Msg2;
• wherein the feedback message comprises a Hybrid Automatic Repeat Request acknowledgment (HARQ ACK).

A terminal device, comprising:

• a memory, a processor, and a computer program that is stored in the memory and that can run on the processor, wherein the processor executes the computer program to:
• transmit a first message to a network side device;
• receive a response message that is transmitted by the network side device and that comprises target configuration information, wherein, there is an association relationship between at least some configuration information in the target configuration information and an association parameter, and the association parameter is a parameter that can be obtained by the terminal device before the terminal device receives the response message;
• and
• obtain, based on the association relationship, configuration information that is associated with a target association parameter of the terminal device from the target configuration information;
• wherein the first message is an Msg1 in a 2-step random access procedure, and the response message is an Msg2 in the 2-step random access procedure;
• the target configuration information comprises uplink resource allocation information used to indicate a transmission resource for a feedback message of the Msg2;
• wherein the processor executes the computer program to:
• after the Msg2 that is transmitted by the network side device and that comprises the target configuration information is received successfully by the terminal device, transmit the feedback message of Msg2 to the network side device;
• wherein the feedback message comprises a Hybrid Automatic Repeat Request acknowledgment (HARQ ACK).