Random access method, random access response method, terminal, and network device
A random access method includes: sending a random access message to a network device; receiving an RAR message from the network device, wherein the RAR message includes indication information, and the indication information indicates a format type of the RAR message; and performing a corresponding random access operation based on the indication information.
1. A random access method applied to a terminal, comprising:
sending a random access message to a network device;
receiving a random access response (RAR) message from the network device, wherein the RAR message comprises indication information, and the indication information indicates a format type of the RAR message; and
performing a corresponding random access operation based on the indication information;
wherein
in a case in which the indication information indicates that the format of the RAR message is a format of success RAR, the indication information further comprises a third indicator field, and the third indicator field indicates whether the RAR message comprises terminal dedicated data.
2. The method according to claim 1 , wherein the indication information comprises a second indicator field, and the second indicator field indicates that the format of the RAR message is a format of fallback RAR or a format of success RAR.
3. The method according to claim 1 , wherein in a case in which a length of the third indicator field is one bit, the third indicator field indicates whether the RAR message comprises the terminal dedicated data; or
in a case in which the length of the third indicator field is at least one bit, the third indicator field indicates whether the RAR message comprises the terminal dedicated data and a quantity of units of the terminal dedicated data comprised in the RAR message in a case in which the RAR message comprises the terminal dedicated data.
4. The method according to claim 1 , wherein the indication information comprises a fourth indicator field, and the fourth indicator field indicates any one of following:
the RAR message comprises backoff indicator (BI) information; and
the format of the RAR message is a format of success RAR.
5. The method according to claim 1 , wherein in a case in which the indication information indicates that the format of the RAR message is a format of fallback RAR, the RAR message comprises a random access preamble identifier (RAPID); or
in a case in which the indication information indicates that the format of the RAR message is a format of success RAR, the RAR message does not comprise the RAPID.
6. The method according to claim 1 , wherein the terminal dedicated data is at least one of a media access control (MAC) service data unit (SDU) or a MAC control element (CE).
7. The method according to claim 1 , wherein the performing a corresponding random access operation based on the indication information comprises at least one of:
in a case in which the indication information indicates that the RAR message comprises backoff indicator (BI) information, performing a fallback operation based on the BI information;
in a case in which the indication information indicates that the format of the RAR message is a format of fallback RAR, performing the fallback operation;
in a case in which the indication information indicates that the format of the RAR message is a format of success RAR, and the RAR message comprises a contention resolution identifier and the contention resolution identifier is verified successfully, determining a random access procedure to be successful;
in a case in which the indication information indicates that the format of the RAR message is a format of success RAR, and the RAR message comprises a random access preamble identifier (RAPID) and a contention resolution identifier, and the RAPID and the contention resolution identifier are verified successfully, determining a random access procedure to be successful;
in a case in which the indication information indicates that the format of the RAR message is a format of success RAR, and the RAR message comprises a contention resolution identifier, and the contention resolution identifier is verified successfully, if the RAR message comprises terminal dedicated data, performing a process of receiving related data based on information about the terminal dedicated data indicated by the indication information; or
in a case in which the indication information indicates that the format of the RAR message is a format of success RAR, and the RAR message comprises a RAPID and a contention resolution identifier and the RAPID and the contention resolution identifier are verified successfully, if the RAR message comprises terminal dedicated data, performing a process of receiving related data based on information about the terminal dedicated data indicated by the indication information.
8. A random access response method applied to a network device, comprising:
receiving a random access message from a terminal;
sending a random access response (RAR) message to the terminal, wherein
the RAR message comprises indication information, and the indication information indicates a format type of the RAR message; wherein
in a case in which the indication information indicates that the format of the RAR message is a format of success RAR, the indication information further comprises a third indicator field, and the third indicator field indicates whether the RAR message comprises terminal dedicated data.
9. The method according to claim 8 , wherein the indication information comprises a second indicator field, and the second indicator field indicates that the format of the RAR message is a format of fallback RAR or a format of success RAR.
10. The method according to claim 8 , wherein in a case in which a length of the third indicator field is one bit, the third indicator field indicates whether the RAR message comprises the terminal dedicated data; or
in a case in which the length of the third indicator field is at least one bit, the third indicator field indicates whether the RAR message comprises the terminal dedicated data and a quantity of units of the terminal dedicated data comprised in the RAR message in a case in which the RAR message comprises the terminal dedicated data.
11. The method according to claim 8 , wherein the indication information comprises a fourth indicator field, and the fourth indicator field indicates any one of following:
the RAR message comprises backoff indicator (BI) information; and
the format of the RAR message is a format of success RAR.
12. The method according to claim 8 , wherein in a case in which the indication information indicates that the format of the RAR message is a format of fallback RAR, the RAR message comprises a random access preamble identifier (RAPID); or
in a case in which the indication information indicates that the format of the RAR message is a format of success RAR, the RAR message does not comprise the RAPID.
13. The method according to claim 8 , wherein
the terminal dedicated data is at least one of a media access control (MAC) service data unit (SDU) or a MAC control element (CE).
14. A terminal, comprising a memory, a processor, and a computer program that is stored on the memory and executable on the processor, wherein the computer program, when executed by the processor, causes the terminal to perform:
sending a random access message to a network device;
receiving a random access response (RAR) message from the network device, wherein the RAR message comprises indication information, and the indication information indicates a format type of the RAR message; and
performing a corresponding random access operation based on the indication information;
wherein
in a case in which the indication information indicates that the format of the RAR message is a format of success RAR, the indication information further comprises a third indicator field, and the third indicator field indicates whether the RAR message comprises terminal dedicated data.
15. The terminal according to claim 14 , wherein the indication information comprises a second indicator field, and the second indicator field indicates that the format of the RAR message is a format of fallback RAR or a format of success RAR.
16. The terminal according to claim 14 , wherein in a case in which a length of the third indicator field is one bit, the third indicator field indicates whether the RAR message comprises the terminal dedicated data; or
in a case in which the length of the third indicator field is at least one bit, the third indicator field indicates whether the RAR message comprises the terminal dedicated data and a quantity of units of the terminal dedicated data comprised in the RAR message in a case in which the RAR message comprises the terminal dedicated data.
17. The terminal according to claim 14 , wherein the indication information comprises a fourth indicator field, and the fourth indicator field indicates any one of:
the RAR message comprises backoff indicator (BI) information; and
the format of the RAR message is a format of success RAR.
18. The terminal according to claim 14 , wherein in a case in which the indication information indicates that the format of the RAR message is a format of fallback RAR, the RAR message comprises a random access preamble identifier (RAPID); or
in a case in which the indication information indicates that the format of the RAR message is a format of success RAR, the RAR message does not comprise the RAPID.
19. The terminal according to claim 14 , wherein the terminal dedicated data is at least one of a media access control (MAC) service data unit (SDU) or a MAC control element (CE).
20. The terminal according to claim 14 , wherein the performing a corresponding random access operation based on the indication information comprises at least one of:
in a case in which the indication information indicates that the RAR message comprises backoff indicator (BI) information, performing a fallback operation based on the BI information;
in a case in which the indication information indicates that the format of the RAR message is a format of fallback RAR, performing the fallback operation;
in a case in which the indication information indicates that the format of the RAR message is a format of success RAR, and the RAR message comprises a contention resolution identifier and the contention resolution identifier is verified successfully, determining a random access procedure to be successful;
in a case in which the indication information indicates that the format of the RAR message is a format of success RAR, and the RAR message comprises a random access preamble identifier (RAPID) and a contention resolution identifier, and the RAPID and the contention resolution identifier are verified successfully, determining a random access procedure to be successful;
in a case in which the indication information indicates that the format of the RAR message is a format of success RAR, and the RAR message comprises a contention resolution identifier, and the contention resolution identifier is verified successfully, if the RAR message comprises terminal dedicated data, performing a process of receiving related data based on information about the terminal dedicated data indicated by the indication information; or
in a case in which the indication information indicates that the format of the RAR message is a format of success RAR, and the RAR message comprises a RAPID and a contention resolution identifier and the RAPID and the contention resolution identifier are verified successfully, if the RAR message comprises terminal dedicated data, performing a process of receiving related data based on information about the terminal dedicated data indicated by the indication information.