Random access method and apparatus, device, and storage medium

A method implemented by a base station of a wireless communications system, wherein the method comprises:

• receiving, on a second time domain resource, a random access preamble from a user equipment (UE) of the wireless communications system, wherein a round-trip delay (RTD) between the UE and the base station is greater than a duration of a single slot;
• obtaining a second index value of the second time domain resource;
• obtaining an index difference between a first time domain resource and the second time domain resource based on the RTD, wherein the first time domain resource is used by the UE to send the random access preamble to the base station;
• obtaining a first index value of the first time domain resource by subtracting the index difference from the second index value;
• obtaining a random access radio network temporary identifier (RA-RNTI) based on the first index value;
• and
• scrambling a cyclic redundancy check (CRC) code of a random access response (RAR) using the RA-RNTI to obtain a scrambled RAR;
• and
• sending the scrambled RAR to the UE.

An apparatus comprising:

• a non-transitory memory configured to store instructions;
• and
• a processor coupled to the non-transitory memory, wherein the instructions cause the processor to be configured to:
• send, on a first time domain resource, a random access preamble to a base station wherein a round-trip delay (RTD) between the apparatus and the base station is greater than a duration of a single slot;
• obtain a first index value of the first time domain resource;
• obtain an index difference between the first time domain resource and a second time domain resource based on the RTD, wherein the second time domain resource is for the base station to receive the random access preamble;
• obtain a second index value of the second time domain resource by adding the first index value and the index difference;
• obtain a random access radio network temporary identifier (RA-RNTI) based on the second index value;
• receive a random access response (RAR) from the base station;
• and
• descramble a cyclic redundancy check (CRC) code of the RAR using the RA-RNTI.

An apparatus comprising:

• a non-transitory memory configured to store instructions;
• and
• a processor coupled to the non-transitory memory, wherein the instructions cause the processor to be configured to:
• receive, on a second time domain resource, a random access preamble from a user equipment (UE), wherein a round-trip delay (RTD) between the UE and the apparatus is greater than a duration of a single slot;
• obtain a second index value of the second time domain resource;
• obtain an index difference between a first time domain resource and the second time domain resource based on the RTD, wherein the first time domain resource is used by the UE to send the random access preamble to the apparatus;
• obtain a first index value of the first time domain resource by subtracting the index difference from the second index value;
• obtain a random access radio network temporary identifier (RA-RNTI) based on the first index value;
• scramble a cyclic redundancy check (CRC) code of a random access response (RAR) using the RA-RNTI to obtain a scrambled RAR;
• and
• send the scrambled RAR to the UE.