Method for determining random access resource, terminal device, and network device
View Patent ↗The embodiments of the present application relate to a method for determining a random access resource, a terminal device, and a network device. The method includes: determining, by a terminal device, Quasi Co-Located (QCL) information or position information of a target Synchronization Signal Block (SSB); and determining, by the terminal device, a set of target random access resources corresponding to the target SSB based on a correspondence between QCL information or position information of SSBs and sets of random access resources. A random access resource in the set of target random access resources is used for the terminal device to perform a random access process. The position indexes of at least two SSBs with a QCL relationship in the correspondence correspond to a same set of random access resources.
1. A method for determining a random access resource, comprising:
determining, by a terminal device, Quasi Co-Located (QCL) information of a target Synchronization Signal Block (SSB); and
determining, by the terminal device, a set of target random access resources corresponding to the QCL information of the target SSB based on a correspondence between QCL information of SSBs and sets of random access resources, wherein a random access resource in the set of target random access resources is used for the terminal device to perform a random access process,
wherein said determining, by the terminal device, the QCL information of the target SSB comprises:
determining, by the terminal device, the QCL information of the target SSB based on a position index of the target SSB and a parameter Q, wherein the parameter Q represents a maximum number of SSBs transmitted within a transmission window of a Discovery Reference Signal (DRS), and the SSBs transmitted within the transmission window of the Discovery Reference Signal (DRS) do not have a QCL relationship.
2. The method according to claim 1 , wherein the random access resource comprises a Physical Random Access Channel (PRACH) occasion and a PRACH preamble.
3. The method according to claim 1 , wherein the QCL information of the target SSB comprises a QCL index of the target SSB;
said determining, by the terminal device, the QCL information of the target SSB based on the position index of the target SSB and the parameter Q comprises:
determining, by the terminal device, the QCL index of the target SSB according to Equation:
QCL
=
mod
(
P
,
Q
)
(
1
)
where QCL represents the QCL index of the target SSB, P represents the position index of the target SSB.
4. The method according to claim 1 , further comprising:
detecting, by the terminal device, the target SSB to determine the position index of the target SSB.
5. The method according to claim 1 , wherein a value range of the position index of the target SSB is dependent on a Subcarrier Spacing (SCS) of a synchronization signal.
6. A method for determining a random access resource, comprising:
determining, by a network device, Quasi Co-Located (QCL) information of a target Synchronization Signal Block (SSB); and
determining, by the network device, a set of target random access resources corresponding to the QCL information of the target SSB based on a correspondence between QCL information of SSBs and sets of random access resources, wherein a random access resource in the set of target random access resources is used for the network device to receive a Random Access Channel (RACH),
wherein said determining, by the network device, the QCL information of the target SSB comprises:
determining, by the network device, the QCL information of the target SSB based on a position index of the target SSB and a parameter Q, wherein the parameter Q represents a maximum number of SSBs transmitted within a transmission window of a Discovery Reference Signal (DRS), and the SSBs transmitted within the transmission window of the Discovery Reference Signal (DRS) do not have a QCL relationship.
7. The method according to claim 6 , wherein the random access resource comprises a Physical Random Access Channel (PRACH) occasion and a PRACH preamble.
8. The method according to claim 6 , wherein the QCL information of the target SSB comprises a QCL index of the target SSB;
said determining, by the network device, the QCL information of the target SSB based on the position index of the target SSB and the parameter Q comprises:
determining, by the network device, the QCL index of the target SSB according to Equation:
QCL
=
mod
(
P
,
Q
)
(
1
)
where QCL represents the QCL index of the target SSB, P represents the position index of the target SSB.
9. The method according to claim 6 , wherein a value range of the position index of the target SSB is dependent on a Subcarrier Spacing (SCS) of a synchronization signal.
10. The method according to claim 6 , further comprising:
transmitting, by the network device, the position index of the target SSB to the terminal device.
11. A terminal device, comprising:
a processor; and
a memory,
wherein the memory is configured to store a computer program, and the processor is configured to invoke and run the computer program stored in the memory to:
determine Quasi Co-Located (QCL) information of a target Synchronization Signal Block (SSB); and
determine a set of target random access resources corresponding to the QCL information of the target SSB based on a correspondence between QCL information of SSBs and sets of random access resources, wherein a random access resource in the set of target random access resources is used for the terminal device to perform a random access process,
wherein the processor is further configured to invoke and run the computer program stored in the memory to determine the QCL information of the target SSB based on a position index of the target SSB and a parameter Q, wherein the parameter Q represents a maximum number of SSBs transmitted within a transmission window of a Discovery Reference Signal (DRS), and the SSBs transmitted within the transmission window of the Discovery Reference Signal (DRS) do not have a QCL relationship.
12. The terminal device according to claim 11 , wherein the random access resource comprises a Physical Random Access Channel (PRACH) occasion and a PRACH preamble.
13. The terminal device according to claim 11 , wherein the QCL information of the target SSB comprises a QCL index of the target SSB;
the processor is further configured to invoke and run the computer program stored in the memory to:
determine the QCL index of the target SSB according to Equation:
QCL
=
mod
(
P
,
Q
)
(
1
)
where QCL represents the QCL index of the target SSB, P represents the position index of the target SSB.
14. The terminal device according to claim 11 , wherein the processor is further configured to invoke and run the computer program stored in the memory to:
detect the target SSB to determine the position index of the target SSB.
15. The terminal device according to claim 11 , wherein a value range of the position index of the target SSB is dependent on a Subcarrier Spacing (SCS) of a synchronization signal.
16. A network device, comprising:
a processor; and
a memory, wherein the memory is configured to store a computer program, and the processor is configured to invoke and run the computer program stored in the memory to:
determine Quasi Co-Located (QCL) information of a target Synchronization Signal Block (SSB); and
determine a set of target random access resources corresponding to the QCL information of the target SSB based on a correspondence between QCL information of SSBs and sets of random access resources, wherein a random access resource in the set of target random access resources is used for the network device to receive a Random Access Channel (RACH), wherein the computer program invoked and run by the processor to determine the QCL information of the target SSB further causes the processor to invoke and run the computer program stored in the memory to:
determine the QCL information of the target SSB based on a position index of the target SSB and a parameter Q, wherein the parameter Q represents a maximum number of SSBs transmitted within a transmission window of a Discovery Reference Signal (DRS), and the SSBs transmitted within the transmission window of the Discovery Reference Signal (DRS) do not have a QCL relationship.
17. The network device according to claim 16 , wherein the random access resource comprises a Physical Random Access Channel (PRACH) occasion and a PRACH preamble.
18. The network device according to claim 16 , wherein the QCL information of the target SSB comprises a QCL index of the target SSB;
the processor is further configured to invoke and run the computer program stored in the memory to:
determine the QCL index of the target SSB according to Equation:
QCL
=
mod
(
P
,
Q
)
(
1
)
where QCL represents the QCL index of the target SSB, P represents the position index of the target SSB.
19. The network device according to claim 16 , wherein a value range of the position index of the target SSB is dependent on a Subcarrier Spacing (SCS) of a synchronization signal.
20. The network device according to claim 16 , wherein the processor is further configured to invoke and run the computer program stored in the memory to:
transmit the position index of the target SSB to the terminal device.