Random access method, device, and system

1. A random access method comprising:

receiving, by a terminal, first configuration information, second configuration information, and third configuration information that are sent by a network device,

wherein the first configuration information is used to configure one or more physical random access channel (PRACH) time-frequency resources and a preamble sequence set,

wherein the second configuration information is used to configure a physical uplink shared channel (PUSCH) time-frequency resource block associated with a PRACH time-frequency resource group,

wherein the PUSCH time-frequency resource block comprises one or more PUSCH time-frequency resources,

wherein PRACH time-frequency resources of the one or more PRACH time-frequency resources located in a same slot belong to one PRACH time-frequency resource group, and

wherein the third configuration information is used to configure at least one of a size of each PUSCH time-frequency resource, a time domain interval between adjacent PUSCH time-frequency resources, a frequency domain interval between adjacent PUSCH time-frequency resources, and a quantity of PUSCH time-frequency resources included in each PUSCH time-frequency resource block;

determining a first PRACH time-frequency resource based on the first configuration information;

determining a first preamble sequence to be sent on the first PRACH time-frequency resource, wherein the first preamble sequence is a preamble sequence in the preamble sequence set;

determining a PUSCH time-frequency resource associated with the first preamble sequence, based on the first PRACH time-frequency resource, the first preamble sequence, the second configuration information, and the third configuration information; and

sending a first message comprising the first preamble sequence and uplink data,

wherein the first preamble sequence is carried on the first PRACH time-frequency resource, and

wherein the uplink data is carried on the PUSCH time-frequency resource associated with the first preamble sequence carried on the first PRACH time-frequency resource.

2. The method according to claim 1 , wherein the second configuration information comprises information used for configuring a demodulation reference signal (DMRS) port associated with the PUSCH time-frequency resource block.

3. The method according to claim 1 , wherein the second configuration information comprises configuration information of a first mapping pattern, the first mapping pattern comprises one or more mapping rules, and each mapping rule is used together with at least one PRACH time-frequency resource to determine a time domain resource and a frequency domain resource of at least one PUSCH time-frequency resource block.

4. The method according to claim 3 , wherein the second configuration information further comprises a period used to configure the PUSCH time-frequency resource block, and the first mapping pattern is used to determine a PUSCH time-frequency resource block associated with a PRACH time-frequency resource in the period.

5. The method according to claim 3 , wherein the second configuration information further comprises a parameter N 1 , and the parameter N 1 is used to determine a quantity of PUSCH time-frequency resource blocks associated with each PRACH time-frequency resource.

6. The method according to claim 1 , wherein the third configuration information comprises the size of each PUSCH time-frequency resource and a parameter N 8 , and the parameter N 8 is used to determine a quantity of PUSCH time-frequency resources associated with each preamble sequence.

7. The method according to claim 6 , wherein determining the PUSCH time-frequency resource associated with the first preamble sequence, based on the first PRACH time-frequency resource, the first preamble sequence, the second configuration information, and the third configuration information comprises:

determining the PUSCH time-frequency resource associated with the first preamble sequence, based on a preset order of mapping from PRACH time-frequency resources to PUSCH time-frequency resource blocks, a preset order of mapping from preamble sequences to PUSCH time-frequency resources, the first PRACH time-frequency resource, the first preamble sequence, the second configuration information, and the third configuration information.

8. The method according to claim 7 , further comprising determining, based on a preset order of mapping from preamble sequences to demodulation reference signal (DMRS) ports, a DMRS port associated with the PUSCH time-frequency resource associated with the first PRACH time-frequency resource.

9. A random access apparatus comprising a receiver and a processor, wherein

the receiver is configured to cooperate with the processor to receive first configuration information, second configuration information, and third configuration information that are sent by a network device,

wherein the first configuration information is used to configure one or more physical random access channel (PRACH) time-frequency resources and a preamble sequence set, and

wherein the second configuration information is used to configure a physical uplink shared channel (PUSCH) time-frequency resource block associated with a PRACH time-frequency resource group;

the PUSCH time-frequency resource block comprises one or more PUSCH time-frequency resources,

wherein PRACH time-frequency resources of the one or more PRACH time-frequency resources located in a same slot belong to one PRACH time-frequency resource group, and

wherein the third configuration information is used to configure at least one of a size of each PUSCH time-frequency resource, a time domain interval between adjacent PUSCH time-frequency resources, a frequency domain interval between adjacent PUSCH time-frequency resources, and a quantity of PUSCH time-frequency resources included in each PUSCH time-frequency resource block;

the processor is configured to determine a first PRACH time-frequency resource based on the first configuration information;

the processor is further configured to determine a first preamble sequence to be sent on the first PRACH time-frequency resource, wherein the first preamble sequence is a preamble sequence in the preamble sequence set;

the processor is further configured to determine a PUSCH time-frequency resource associated with the first preamble sequence, based on the first PRACH time-frequency resource, the first preamble sequence, the second configuration information, and the third configuration information; and

the receiver is further configured to cooperate with the processor to send a first message comprising the first preamble sequence and uplink data,

wherein the first preamble sequence is carried on the first PRACH time-frequency resource, and the uplink data is carried on the PUSCH time-frequency resource associated with the first preamble sequence carried on the first PRACH time-frequency resource.

10. The apparatus according to claim 9 , wherein the second configuration information comprises information used for configuring a demodulation reference signal (DMRS) port associated with the PUSCH time-frequency resource block.

11. The apparatus according to claim 9 , wherein the second configuration information comprises configuration information of a first mapping pattern, the first mapping pattern comprises one or more mapping rules, and each mapping rule may be used together with at least one PRACH time-frequency resource to determine a time domain resource and a frequency domain resource of at least one PUSCH time-frequency resource block.

12. The apparatus according to claim 11 , wherein the second configuration information further comprises a period used to configure the PUSCH time-frequency resource block, and the first mapping pattern is used to determine a PUSCH time-frequency resource block associated with a PRACH time-frequency resource in the period.

13. The apparatus according to claim 11 , wherein the second configuration information further comprises a parameter N 1 , and the parameter N 1 is used to determine a quantity of PUSCH time-frequency resource blocks associated with each PRACH time-frequency resource.

14. The apparatus according to claim 13 , wherein the parameter N 1 and the first mapping pattern are used to determine the PUSCH time-frequency resource block associated with each PRACH time-frequency resource.

15. The apparatus according to claim 9 , wherein the third configuration information comprises the size of each PUSCH time-frequency resource and a parameter N 8 , and the parameter N 8 is used to determine a quantity of PUSCH time-frequency resources associated with each preamble sequence.

16. The apparatus according to claim 15 , wherein in connection with determining the PUSCH time-frequency resource associated with the first preamble sequence the processor is configured to:

determine the PUSCH time-frequency resource associated with the first preamble sequence, based on a preset order of mapping from PRACH time-frequency resources to PUSCH time-frequency resource blocks, a preset order of mapping from preamble sequences to PUSCH time-frequency resources, the first PRACH time-frequency resource, the first preamble sequence, the second configuration information, and the third configuration information.

17. The apparatus according to claim 16 , wherein the processor is further configured to:

determine, based on a preset order of mapping from preamble sequences to demodulation reference signal (DMRS) ports, a DMRS port associated with the PUSCH time-frequency resource associated with the first PRACH time-frequency resource.

18. A random access apparatus comprising a receiver and a processor, wherein

the receiver is configured to cooperate with the processor to send first configuration information, second configuration information, and third configuration information to a terminal,

wherein the first configuration information is used to configure one or more physical random access channel (PRACH) time-frequency resources and a preamble sequence set,

wherein the second configuration information is used to configure a physical uplink shared channel (PUSCH) time-frequency resource block associated with a PRACH time-frequency resource group,

wherein the PUSCH time-frequency resource block comprises one or more PUSCH time-frequency resources,

wherein PRACH time-frequency resources of the one or more PRACH time-frequency resources located in a same slot belong to one PRACH time-frequency resource group, and

wherein the third configuration information is used to configure at least one of a size of each PUSCH time-frequency resource, a time domain interval between adjacent PUSCH time-frequency resources, a frequency domain interval between adjacent PUSCH time-frequency resources, and a quantity of PUSCH time-frequency resources included in each PUSCH time-frequency resource block; and

the receiver is further configured to cooperate with the processor to receive a first message that comprises a first preamble sequence and uplink data and that is sent by the terminal,

wherein the first preamble sequence is carried on a first PRACH time-frequency resource, and the uplink data is carried on a PUSCH time-frequency resource associated with the first preamble sequence carried on the first PRACH time-frequency resource.

19. A non-transitory computer-readable storage medium, comprising a processor-executable instruction, wherein when the instruction is run on a computer, the computer is caused to perform a method comprising:

receiving first configuration information, second configuration information, and third configuration information that are sent by a network device,

wherein the first configuration information is used to configure one or more physical random access channel (PRACH) time-frequency resources and a preamble sequence set,

wherein the second configuration information is used to configure a physical uplink shared channel (PUSCH) time-frequency resource block associated with a PRACH time-frequency resource group,

wherein the PUSCH time-frequency resource block comprises one or more PUSCH time-frequency resources,

wherein PRACH time-frequency resources of the one or more PRACH time-frequency resources located in a same slot belong to one PRACH time-frequency resource group, and

wherein the third configuration information is used to configure at least one of a size of each PUSCH time-frequency resource, a time domain interval between adjacent PUSCH time-frequency resources, a frequency domain interval between adjacent PUSCH time-frequency resources, and a quantity of PUSCH time-frequency resources included in each PUSCH time-frequency resource block;

determining a first PRACH time-frequency resource based on the first configuration information;

determining a first preamble sequence to be sent on the first PRACH time-frequency resource, wherein the first preamble sequence is a preamble sequence in the preamble sequence set;

determining a PUSCH time-frequency resource associated with the first preamble sequence, based on the first PRACH time-frequency resource, the first preamble sequence, the second configuration information, and the third configuration information; and

sending a first message comprising the first preamble sequence and uplink data,

wherein the first preamble sequence is carried on the first PRACH time-frequency resource, and

wherein the uplink data is carried on the PUSCH time-frequency resource associated with the first preamble sequence carried on the first PRACH time-frequency resource.

20. The non-transitory computer-readable storage medium according to claim 19 , wherein the second configuration information comprises information used for configuring a demodulation reference signal (DMRS) port associated with the PUSCH time-frequency resource block.