Random access method and apparatus

A random access method, comprising:

• broadcasting, by a network device, a random access channel (RACH) resource;
• and
• receiving, by the network device, a random access preamble via a first message (MSG 1) from a terminal device, wherein the random access preamble is sent based on a selected RACH resource and a time adjustment value, and the time adjustment value is determined based on a position of the terminal device and a position of the network device;
• sending a second timing advance carried in a second message (MSG 2) to the terminal device;
• receiving, by the network device, the time adjustment value or an adjusted time adjustment value from the terminal device through a third message (MSG 3) from the terminal device to the network device, a fifth message (MSG 5) from the terminal device to the network device, or a combined message (MSG A) as a combination of the first message (MSG 1) and the third message (MSG 3), wherein the adjusted time adjustment value is obtained by the terminal device by adjusting the time adjustment value based on the second timing advance sent by the network device.

A random access apparatus, comprising:

• one or more processors;
• and
• a non-transitory computer readable memory, storing a computer program including instructions that, when executed by the one or more processors, cause the one or more processors to perform operations comprising:
• obtaining a position of the random access apparatus and a position of a network device, and determining a time adjustment value based on the position of the random access apparatus and the position of the network device;
• and
• sending a random access preamble via a first message (MSG 1) based on the time adjustment value and a random access channel (RACH) resource configured by the network device;
• sending the time adjustment value or an adjusted time adjustment value to the network device through a third message (MSG 3) from the random access apparatus to the network device, a fifth message (MSG 5) from the random access apparatus to the network device or a combined message (MSG A) as a combination of the first message (MSG 1) and the third message (MSG 3), wherein the adjusted time adjustment value is obtained by the random access apparatus by adjusting the time adjustment value.

A random access apparatus, comprising:

• one or more processors;
• and
• a non-transitory computer readable memory, storing a computer program including instructions that, when executed by the one or more processors, cause the one or more processors to further perform operations comprising:
• broadcasting a random access channel (RACH) resource;
• and
• receiving a random access preamble via a first message (MSG 1) from a terminal device, wherein the random access preamble is sent based on a selected RACH resource and a time adjustment value, and the time adjustment value is determined based on a position of the terminal device and a position of the random access apparatus;
• sending a second timing advance carried in a second message (MSG 2) to the terminal device;
• and receiving, by the random access apparatus, the time adjustment value or an adjusted time adjustment value from the terminal device through a third message (MSG 3) from the terminal device to the random access apparatus, a fifth message (MSG 5) from the terminal device to the random access apparatus or a combined message (MSG A) as a combination of the first message (MSG 1) and the third message (MSG 3), wherein the adjusted time adjustment value is obtained by the terminal device by adjusting the time adjustment value based on the second timing advance sent by the random access apparatus.