Communication method and related apparatus

A communication method, comprising:

• sending a system information block 1 (SIB1) to a terminal device, wherein the SIB1 comprises synchronization signal block (SSB configuration information and physical random access channel (PRACH) configuration information, the SSB configuration information indicates a quantity N of configured SSBs and an SSB configuration period, and the PRACH configuration information indicates a PRACH configuration period;
• and
• determining a first time period based on at least one of the SSB configuration period or the PRACH configuration period, wherein
• there is a mapping relationship between the N SSBs and M random access channel occasion (RO) groups in the first time period, the M RO groups appear at least once, the M RO groups comprise an RO group corresponding to each of the N SSBs and each of L PRACH repetition quantities, and mapping between the N SSBs and the M RO groups is the same in each of K consecutive first time periods;
• and one RO group comprises at least two ROs, all ROs in the RO group are located at different time domain positions, and all the ROs in the RO group are associated with at least one same SSB, wherein L, N, and M are integers greater than 0, and K is an integer greater than 1.

A communication apparatus, comprising:

• at least one processor, wherein when the at least one processor executes instructions, the communication apparatus is caused to:
• receive a system information block 1 (SIB1) from an access network device, wherein the SIB1 comprises synchronization signal block (SSB) configuration information and physical random access channel (PRACH) configuration information, the SSB configuration information indicates a quantity N of configured SSBs and an SSB configuration period, and the PRACH configuration information indicates a PRACH configuration period;
• and
• determine a first time period based on at least one of the SSB configuration period or the PRACH configuration period, wherein
• there is a mapping relationship between the N SSBs and M random access channel occasion (RO) groups in the first time period, the M RO groups appear at least once, the M RO groups comprise an RO group corresponding to each of the N SSBs and each of L PRACH repetition quantities, and mapping between the N SSBs and the M RO groups is the same in each of K consecutive first time periods;
• and one RO group comprises at least two ROs, all ROs in the RO group are located at different time domain positions, and all the ROs in the RO group are associated with at least one same SSB, wherein L, N, and M are integers greater than 0, and K is an integer greater than 1.

A communication apparatus, comprising:

• at least one processor, wherein when the at least one processor executes instructions, the communication apparatus is caused to:
• send a system information block 1 (SIB1) to a terminal device, wherein the SIB1 comprises synchronization signal block (SSB) configuration information and physical random access channel (PRACH) configuration information, the SSB configuration information indicates a quantity N of configured SSBs and an SSB configuration period, and the PRACH configuration information indicates a PRACH configuration period;
• and
• determine a first time period based on at least one of the SSB configuration period or the PRACH configuration period, wherein
• there is a mapping relationship between the N SSBs and M random access channel occasion (RO) groups in the first time period, the M RO groups appear at least once, the M RO groups comprise an RO group corresponding to each of the N SSBs and each of L PRACH repetition quantities, and mapping between the N SSBs and the M RO groups is the same in each of K consecutive first time periods;
• and one RO group comprises at least two ROs, all ROs in the RO group are located at different time domain positions, and all the ROs in the RO group are associated with at least one same SSB, wherein L, N, and M are integers greater than 0, and K is an integer greater than 1.