Granted Patent B2

US 12,732,897 · App. 18/344,982 · Granted Sep 8, 2026

Inventors: Dongru Li (Guangdong, CN); Na Li (Guangdong, CN); Xiaodong Shen (Guangdong, CN); Kai Wu (Guangdong, CN)

Assignee: VIVO MOBILE COMMUNICATION CO., LTD.

H04W48/12H04W52/0212

Abstract

Claims (88)

1 . A search space group switching method applied to a terminal, wherein the method comprises:

switching between at least two search space groups; and

performing corresponding physical downlink control channel PDCCH monitoring based on a switched-to search space group; wherein

the at least two search space groups comprise search space group #2, search space group #2 being not linked to a first search space, the first search space comprising a CSS other than a first type CSS, wherein the first type CSS is a type 3 CSS;

wherein the at least two search space groups further comprise search space group #0 and search space group #1; and the switching between at least two search space groups comprises:

switching from search space group #2 to search space group #0;

wherein the switching from search space group #2 to search space group #0 comprises:

switching from search space group #2 to search space group #0 after a first timer times out or after a first time interval has elapsed since a first timer times out.

2 . The method according to claim 1 , wherein the switching between at least two search space groups further comprises at least one of the following:

switching from search space group #0 to search space group #1; and

switching from search space group #0 to search space group #2;

switching from search space group #2 to search space group #1; and

switching from search space group #2 to a default search space group, wherein the default search space group is any one of the at least two search space groups.

3 . The method according to claim 2 , wherein the switching from search space group #0 to search space group #1, or the switching from search space group #0 to search space group #2, comprises at least one of the following:

switching from search space group #0 to search space group #1 in a case that the terminal is using search space group #0 and that an obtained first indication is a first value; and

switching from search space group #0 to search space group #2 in a case that the terminal is using search space group #0 and that an obtained first indication is a second value; wherein

the first indication is carried in first downlink control information DCI.

4 . The method according to claim 3 , wherein the first DCI further comprises a second indication, and the second indication satisfies at least one of the following:

a preset indication field being used for the first indication in a case that the second indication obtained is a third value; and

a preset indication field being used for a preset indication in a case that the second indication obtained is a fourth value.

5 . The method according to claim 2 , wherein the switching from search space group #0 to search space group #1, or the switching from search space group #0 to search space group #2, comprises at least one of the following:

switching from search space group #0 to search space group #1 in a case that the terminal is using search space group #0 and that a minimum available scheduling offset indicated by an obtained minimum available scheduling offset indication is equal to 0; and

switching from search space group #0 to search space group #2 in a case that the terminal is using search space group #0 and that a minimum available scheduling offset indicated by an obtained minimum available scheduling offset indication is greater than 0.

6 . The method according to claim 2 , wherein the method further comprises: starting or restarting the first timer after switching to search space group #2; wherein

the first timer is used for switching from search space group #2 to search space group #0.

7 . The method according to claim 2 , wherein the switching from search space group #2 to search space group #1, or switching from search space group #2 to a default search space group, comprises:

performing at least one of the following in a case that the terminal is using search space group #2 and that second DCI is detected:

switching from search space group #2 to search space group #1; and

switching from search space group #2 to the default search space group.

8 . The method according to claim 7 , wherein

the second DCI is scrambled with a specific radio network temporary identity RNTI; and/or

a search space carrying the second DCI is a specific type of search space;

or,

wherein the method further comprises: determining, based on at least one of a network-side device configuration, a predefined rule, and the second DCI, to switch from search space group #2 to search space group #1 or from search space group #2 to the default search space group;

or,

wherein the method further comprises: continuing using search space group #2 in a case that the terminal is using search space group #2 and that third DCI is detected.

9 . The method according to claim 8 , wherein the third DCI is scrambled with a group common RNTI or a broadcast RNTI;

or,

wherein the method further comprises:

starting or restarting the first timer after the third DCI is detected; wherein

the first timer is used for switching from search space group #2 to search space group #0 or from search space group #2 to a default search space group.

10 . The method according to claim 2 , wherein a network-side configuration or a protocol stipulates that the terminal does not support direct switching between search space group #2 and search space group #1.

11 . A terminal, comprising a processor, a memory, and a program or instructions stored in the memory and capable of running on the processor, wherein the program or instructions are executed by the processor to perform:

switching between at least two search space groups; and

performing corresponding physical downlink control channel PDCCH monitoring based on a switched-to search space group; wherein

the at least two search space groups comprise search space group #2, search space group #2 being not linked to a first search space, the first search space comprising a CSS other than a first type CSS, wherein the first type CSS is a type 3 CSS;

wherein the at least two search space groups further comprise search space group #0 and search space group #1; and the switching between at least two search space groups comprises:

switching from search space group #2 to search space group #0;

wherein the switching from search space group #2 to search space group #0 comprises:

switching from search space group #2 to search space group #0 after a first timer times out or after a first time interval has elapsed since a first timer times out.

12 . The terminal according to claim 11 , wherein when switching between at least two search space groups, the program or instructions are executed by the processor to further perform at least one of the following:

switching from search space group #0 to search space group #1; and

switching from search space group #0 to search space group #2;

switching from search space group #2 to search space group #1; and

switching from search space group #2 to a default search space group, wherein the default search space group is any one of the at least two search space groups.

13 . The terminal according to claim 12 , wherein when switching from search space group #0 to search space group #1, or switching from search space group #0 to search space group #2, the program or instructions are executed by the processor to perform at least one of the following:

switching from search space group #0 to search space group #1 in a case that the terminal is using search space group #0 and that an obtained first indication is a first value; and

switching from search space group #0 to search space group #2 in a case that the terminal is using search space group #0 and that an obtained first indication is a second value; wherein

the first indication is carried in first downlink control information DCI.

14 . The terminal according to claim 13 , wherein the first DCI further comprises a second indication, and the second indication satisfies at least one of the following:

a preset indication field being used for the first indication in a case that the second indication obtained is a third value; and

a preset indication field being used for a preset indication in a case that the second indication obtained is a fourth value.

15 . The terminal according to claim 12 , wherein when switching from search space group #0 to search space group #1, or the switching from search space group #0 to search space group #2, the program or instructions are executed by the processor to perform at least one of the following:

switching from search space group #0 to search space group #1 in a case that the terminal is using search space group #0 and that a minimum available scheduling offset indicated by an obtained minimum available scheduling offset indication is equal to 0; and

switching from search space group #0 to search space group #2 in a case that the terminal is using search space group #0 and that a minimum available scheduling offset indicated by an obtained minimum available scheduling offset indication is greater than 0.

16 . The terminal according to claim 12 , wherein the program or instructions are executed by the processor to perform: starting or restarting the first timer after switching to search space group #2; wherein

the first timer is used for switching from search space group #2 to search space group #0.

17 . The terminal according to claim 12 , wherein when switching from search space group #2 to search space group #1, or switching from search space group #2 to a default search space group, the program or instructions are executed by the processor to perform:

performing at least one of the following in a case that the terminal is using search space group #2 and that second DCI is detected:

switching from search space group #2 to search space group #1; and

switching from search space group #2 to the default search space group.

18 . A non-transitory readable storage medium, wherein the readable storage medium stores a program or instructions, and the program or instructions are executed by a processor to perform:

switching between at least two search space groups; and

performing corresponding physical downlink control channel PDCCH monitoring based on a switched-to search space group; wherein

the at least two search space groups comprise search space group #2, search space group #2 being not linked to a first search space, the first search space comprising a CSS other than a first type CSS, wherein the first type CSS is a type 3 CSS;

wherein the at least two search space groups further comprise search space group #0 and search space group #1; and the switching between at least two search space groups comprises:

switching from search space group #2 to search space group #0;

wherein the switching from search space group #2 to search space group #0 comprises:

switching from search space group #2 to search space group #0 after a first timer times out or after a first time interval has elapsed since a first timer times out.

19 . The non-transitory readable storage medium according to claim 18 , wherein when switching between at least two search space groups, the program or instructions are executed by the processor to further perform at least one of the following:

switching from search space group #0 to search space group #1; and

switching from search space group #0 to search space group #2;

switching from search space group #2 to search space group #1; and

switching from search space group #2 to a default search space group, wherein the default search space group is any one of the at least two search space groups.

20 . The non-transitory readable storage medium according to claim 19 , wherein when switching from search space group #0 to search space group #1, or switching from search space group #0 to search space group #2, the program or instructions are executed by the processor to perform at least one of the following:

switching from search space group #0 to search space group #1 in a case that the terminal is using search space group #0 and that an obtained first indication is a first value; and

switching from search space group #0 to search space group #2 in a case that the terminal is using search space group #0 and that an obtained first indication is a second value; wherein

the first indication is carried in first downlink control information DCI.

Assignments (1)

Priority Claims (1)

Continuity (2)

References Cited (40)