Granted Patent B2

US 12,418,857 · App. 17/859,118 · Granted Sep 16, 2025

Inventors: Zhe Fu (Dongguan, CN); Haitao Li (Dongguan, CN)

Assignee: GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD.

H04W48/18H04W74/0841H04W74/0875

Abstract

Claims (58)

1. A terminal device, comprising: a processor, a memory configured to store a computer program that is runnable on the processor, and a network interface, wherein when the computer program is run, the processor is configured to receive, through the network interface, a correspondence relation between network slice information supported by a serving cell and Random Access Channel (RACH) parameters, wherein the network slice information comprises Single Network Slice Selection Assistance Information (S-NSSAI) or an S-NSSAI combination; and

perform cell access based on the correspondence relation;

wherein the network slice information comprises S-NSSAI, the processor is configured to perform cell access based on the correspondence relation between the S-NSSAI supported by the serving cell and the RACH parameters and active network slices of the terminal device; or,

wherein the network slice information comprises an S-NSSAI combination, the processor is configured to perform cell access based on the correspondence relation between S-NSSAI combinations supported by the serving cell and the RACH parameters and active network slices of the terminal device;

wherein the active network slices comprise at least one of: a network slice which a non-access stratum of the terminal device indicates to be activated, a network slice which the non-access stratum of the terminal device indicates to be triggered, and a network slice which the non-access stratum of the terminal device indicates to be needed.

2. The terminal device of claim 1 , wherein the processor is further configured to receive, through the network interface, the network slice information supported by the serving cell.

3. The terminal device of claim 1 , wherein the processor is configured to select randomly one active network slice from the active network slices; and

determine, based on the correspondence relation between the S-NSSAI supported by the serving cell and the RACH parameters, an RACH parameter corresponding to the selected active network slice, wherein the RACH parameter is used for cell access.

4. The terminal device of claim 1 , wherein the processor is configured to select one active network slice according to a priority order of the active network slices; and

determine, based on the correspondence relation between the S-NSSAI supported by the serving cell and the RACH parameters, an RACH parameter corresponding to the selected active network slice, wherein the RACH parameter is used for cell access.

5. The terminal device of claim 1 wherein the processor is configured to determine an S-NSSAI combination comprising a largest number of active network slices among the S-NSSAI combinations supported by the serving cell.

6. The terminal device of claim 5 , wherein in a case where there are more than one S-NSSAI combination comprising the largest number of active network slices, the processor is configured to select randomly one S-NSSAI combination from S-NSSAI combinations comprising the largest number of active network slices; and

determine an RACH parameter corresponding to the selected S-NSSAI combination based on the correspondence relation between the S-NSSAI combinations supported by the serving cell and the RACH parameters, wherein the RACH parameter is used for cell access.

7. The terminal device of claim 5 , wherein in a case where there are more than one S-NSSAI combination comprising the largest number of active network slices, the processor is configured to select one S-NSSAI combination from S-NSSAI combinations comprising the largest number of active network slices based on an implementation of the terminal device, and

determine an RACH parameter corresponding to the selected S-NSSAI combination based on the correspondence relation between the S-NSSAI combinations supported by the serving cell and the RACH parameters, wherein the RACH parameter is used for cell access.

8. The terminal device of claim 5 , wherein in a case where there are more than one S-NSSAI combination comprising the largest number of active network slices, the processor is configured to select one S-NSSAI combination comprising a network slice with a highest priority from S-NSSAI combinations comprising the largest number of active network slices; and

determine an RACH parameter corresponding to the selected S-NSSAI combination based on the correspondence relation between the S-NSSAI combinations supported by the serving cell and the RACH parameters, wherein the RACH parameter is used for cell access.

9. The terminal device of claim 8 , wherein priorities of the network slices are capable of being determined according to an order in a list of S-NSSAIs corresponding to the network slices;

or, the priorities of the network slices are indicated by a non-access stratum of the terminal device;

or, the priorities of the network slices are stored in the terminal device;

or, the priorities of the network slices are determined according to a service triggering order;

or, the priorities of the network slices are determined according to a service characteristic;

or, the priorities of the network slices are determined according to an indication of a network device.

10. The terminal device of claim 5 , wherein in a case where there are more than one S-NSSAI combination comprising the largest number of active network slices, the processor is configured to select one S-NSSAI combination comprising a largest number of network slices in a first priority range from S-NSSAI combinations comprising the largest number of active network slices; and

determine an RACH parameter corresponding to the selected S-NSSAI combination based on the correspondence relation between the S-NSSAI combinations supported by the serving cell and the RACH parameters, wherein the RACH parameter is used for cell access.

11. The terminal device of claim 5 , wherein in a case where there are more than one S-NSSAI combination comprising the largest number of active network slices, the processor is configured to determine a first S-NSSAI combination comprising a largest number of network slices supported by the terminal device among S-NSSAI combinations comprising the largest number of active network slices; and

determine an RACH parameter corresponding to the first S-NSSAI combination based on the correspondence relation between the S-NSSAI combinations supported by the serving cell and the RACH parameters, wherein the RACH parameter is used for cell access.

12. The terminal device of claim 11 , wherein in a case where there are more than one first S-NSSAI combination, the processor is configured to select randomly one of first S-NSSAI combinations as a second S-NSSAI combination; and

determine an RACH parameter corresponding to the second S-NSSAI combination based on the correspondence relation between the S-NSSAI combinations supported by the serving cell and the RACH parameters, wherein the RACH parameter is used for cell access,

or,

wherein in a case where there are more than one first S-NSSAI combination, the processor is configured to select one of first S-NSSAI combinations as a third S-NSSAI combination based on an implementation of the terminal device; and determine an RACH parameter corresponding to the third S-NSSAI combination based on the correspondence relation between the S-NSSAI combinations supported by the serving cell and the RACH parameters, wherein the RACH parameter is used for cell access,

or,

wherein in a case where there are more than one first S-NSSAI combination, the processor is configured to select one S-NSSAI combination comprising a network slice with a highest priority from first S-NSSAI combinations as a fourth S-NSSAI combination; and determine an RACH parameter corresponding to the fourth S-NSSAI combination based on the correspondence relation between the S-NSSAI combinations supported by the serving cell and the RACH parameters, wherein the RACH parameter is used for cell access,

or,

wherein in a case there are more than one first S-NSSAI combination, the processor is configured to select one S-NSSAI combination comprising a largest number of network slices in a second priority range from first S-NSSAI combinations as a fifth S-NSSAI combination; and

determine an RACH parameter corresponding to the fifth S-NSSAI combination based on the correspondence relation between the S-NSSAI combinations supported by the serving cell and the RACH parameters, wherein the RACH parameter is used for cell access.

13. The terminal device of claim 11 , wherein the network slices supported by the terminal device are stored in the terminal device.

14. The terminal device of claim 1 , wherein the active network slices are indicated by a non-access stratum entity of the terminal device to an access stratum entity of the terminal device, wherein the active network slices are informed to an access stratum entity by a non-access stratum entity through a service request process.

15. The terminal device of claim 1 , wherein the processor is further configured to report, through the network interface, a network slice list to the network device,

wherein the network slice list comprises any one of:

a network slice comprised in an intersection of active network slices of the terminal device and network slices supported by the serving cell;

a network slice comprised in an intersection of network slices supported by the terminal device and network slices supported by the serving cell;

a network slice not supported by the serving cell among active network slices of the terminal device;

a network slice not supported by the serving cell among network slices supported by the terminal device;

an active network slice among network slices supported by the terminal device; and

a non-active network slice among network slices supported by the terminal device.

16. A network device, comprising:

a processor, a memory configured to store a computer program that is runnable on the processor, and a network interface, wherein when the computer program is run, the processor is configured to send, through the network interface, a correspondence relation between network slice information supported by a serving cell and Random Access Channel (RACH) parameters to a terminal device, wherein the network slice information comprises Single Network Slice Selection Assistance Information (S-NSSAI) or an S-NSSAI combination, and receive cell access based on the correspondence relation;

wherein the network slice information comprises S-NSSAI, the processor is configured to receive cell access based on the correspondence relation between the S-NSSAI supported by the serving cell and the RACH parameters and active network slices of the terminal device; or,

wherein the network slice information comprises an S-NSSAI combination, the processor is configured to receive cell access based on the correspondence relation between S-NSSAI combinations supported by the serving cell and the RACH parameters and active network slices of the terminal device;

wherein the active network slices comprise at least one of: a network slice which anon-access stratum of the terminal device indicates to be activated, a network slice which the non-access stratum of the terminal device indicates to be triggered, and a network slice which the non-access stratum of the terminal device indicates to be needed.

17. A method for cell access, comprising:

receiving, by a terminal device, a correspondence relation between network slice information supported by a serving cell and Random Access Channel (RACH) parameters, wherein the network slice information comprises Single Network Slice Selection Assistance Information (S-NSSAI) or an S-NSSAI combination; and

performing, by the terminal device, cell access based on the correspondence relation;

wherein the network slice information comprises S-NSSAI, performing, by the terminal device, cell access based on the correspondence relation comprises: performing, by the terminal device, cell access based on the correspondence relation between the S-NSSAI supported by the serving cell and the RACH parameters and active network slices of the terminal device; or,

wherein the network slice information comprises an S-NSSAI combination, performing, by the terminal device, cell access based on the correspondence relation comprises:

performing, by the terminal device, cell access based on the correspondence relation between S-NSSAI combinations supported by the serving cell and the RACH parameters and active network slices of the terminal device;

wherein the active network slices comprise at least one of: a network slice which anon-access stratum of the terminal device indicates to be activated, a network slice which the non-access stratum of the terminal device indicates to be triggered, and a network slice which the non-access stratum of the terminal device indicates to be needed.

Assignments (1)

Continuity (2)

References Cited (20)