Method and apparatus for determining radio network temporary identifier in two-step random access procedure
Various embodiments of the present disclosure provide methods and apparatuses for determining radio network temporary identifier (RNTI) in a two-step random access procedure. A method of a terminal device, comprising: determining a request message for random access, wherein the request message comprises a preamble and a physical uplink shared channel, PUSCH, message and the PUSCH message is determined based on a first radio network temporary identity, RNTI; transmitting the request message; and obtaining a response message for random access based on a second RNTI, wherein the first RNTI and the second RNTI are the same or different.
1. A method performed by a terminal device, comprising:
determining a request message for random access, wherein the request message comprises a preamble and a physical uplink shared channel (PUSCH) message and wherein the PUSCH message is determined based on a first radio network temporary identity (RNTI);
transmitting the request message; and
obtaining a response message for random access based on a second RNTI;
wherein the first RNTI is used for scrambling encoded bits of the PUSCH message, and the second RNTI is used for scrambling a cyclic redundancy check (CRC) of a Physical Downlink Control Channel (PDCCH) message scheduling a Physical Downlink Shared Channel (PDSCH) carrying the response message.
2. The method of claim 1 , wherein the first RNTI and the second RNTI are the same.
3. The method of claim 1 , wherein the first RNTI and the second RNTI are different.
4. The method of claim 1 , wherein the second RNTI is determined based on a Radio Resource Control (RRC) status of the terminal device.
5. The method of claim 4 , wherein the RRC status comprises a connected mode.
6. The method of claim 1 , wherein the second RNTI is determined based on the first RNTI.
7. The method of claim 1 , wherein at least one of the first RNTI and the second RNTI is determined based on a numbering of a set of physical random access channel (PRACH) occasions.
8. The method of claim 1 , wherein at least one of the first RNTI and the second RNTI is determined based on a set of RNTI values, wherein the set of RNTI values is determined based on a timing/frequency resource of the request message.
9. A method performed by a network node, comprising:
obtaining, from a terminal device, a request message comprising a preamble and a physical uplink shared channel (PUSCH) message based on a first radio network temporary identity (RNTI);
determining a response message based on a second RNTI; and
transmitting the response message to the terminal device;
wherein the first RNTI is used for scrambling encoded bits of the PUSCH message, and the second RNTI is used for scrambling a cyclic redundancy check (CRC) of a Physical Downlink Control Channel (PDCCH) message scheduling a Physical Downlink Shared Channel (PDSCH) carrying the response message.
10. The method of claim 9 , wherein the first RNTI and the second RNTI are the same.
11. The method of claim 9 , wherein the first RNTI and the second RNTI are different.
12. The method of claim 9 , wherein the second RNTI is determined based on a Radio Resource Control (RRC) status of the terminal device.
13. The method of claim 9 , wherein the second RNTI is determined based on the first RNTI.
14. The method of claim 9 , wherein at least one of the first RNTI and the second RNTI is determined based on a numbering of a set of physical random access channel (PRACH) occasions.
15. The method of claim 9 , wherein at least one of the first RNTI and the second RNTI is determined based on a set of RNTI values, wherein the set of RNTI values is determined based on a timing/frequency resource of the request message.
16. A terminal device, comprising:
a non-transitory computer-readable medium having stored thereon computer-executable instructions; and
a processor coupled to the non-transitory computer-readable medium,
wherein the computer-executable instructions, when executed by the processor, cause the terminal device to:
determine a request message for random access, wherein the request message comprises a preamble and a physical uplink shared channel (PUSCH) message and wherein the PUSCH message is determined based on a first radio network temporary identity (RNTI);
transmit the request message; and
obtain a response message for random access based on a second RNTI;
wherein the first RNTI is used for scrambling encoded bits of the PUSCH message, and the second RNTI is used for scrambling a cyclic redundancy check (CRC) of a Physical Downlink Control Channel (PDCCH) message scheduling a Physical Downlink Shared Channel (PDSCH) carrying the response message.