US-12621845-B2 - PDCCH blind detection limiting method, terminal, and network side device

Abstract

This application relates to the field of communication technologies. Disclosed are a PDCCH blind detection limiting method, a terminal, and a network side device. The method includes: grouping a plurality of scheduling cells, where the plurality of scheduling cells include at least one first cell that supports slot group-based physical downlink control channel PDCCH blind detection limitation; and determining, based on a grouping result, PDCCH blind detection limitation information corresponding to each group.

Inventors

• Gen LI

Assignees

• VIVO MOBILE COMMUNICATION CO., LTD.

Dates

Publication Date

20260505

Application Date

20230629

Priority Date

20201231

Claims (19)

1. 1 . A PDCCH blind detection limiting method performed by a terminal, comprising: grouping a plurality of scheduling cells into at least one cell group, wherein the plurality of scheduling cells comprise at least one first cell that supports slot group-based physical downlink control channel (PDCCH) blind detection limitation; and determining, based on a result of the grouping, PDCCH blind detection limitation information corresponding to each group of the at least one cell group; wherein a rule for grouping the plurality of scheduling cells into the at least one cell group comprises: grouping all scheduling cells that support the slot group-based PDCCH blind detection limitation, have a same subcarrier spacing (SCS), and have a same quantity of slots in slot groups into one cell group.
2. 2 . The PDCCH blind detection limiting method according to claim 1 , further comprising: determining, in the following manner, a slot group to which the PDCCH blind detection limitation is applied and that is in the first cell: determining a quantity N of slots or a slot quantity set {Ni} contained in the slot group to which the PDCCH blind detection limitation is applied; and determining, based on the determined quantity N of slots or slot quantity set {Ni}, a location of the slot group to which the PDCCH blind detection limitation is applied.
3. 3 . The PDCCH blind detection limiting method according to claim 1 , wherein the determining, based on a result of the grouping, PDCCH blind detection limitation information corresponding to each group of the at least one cell group comprises: obtaining one or more of the following parameters, and determining, based on the obtained one or more parameters, the blind detection limitation information corresponding to the cell group, wherein the parameters comprise: a quantity A of cells in the cell group; a cell quantity capacity value C; a budget value B of each cell; a total quantity D1 of all scheduling cells that support the slot group-based PDCCH blind detection limitation; a quantity D2 of all scheduling cells that support the slot-based PDCCH blind detection limitation and the slot group-based PDCCH blind detection limitation; and a quantity D3 of all scheduling cells that support the slot group-based PDCCH blind detection limitation and have the same quantity of slots in the slot groups and/or have the same minimum spacing between the slot groups.
4. 4 . The PDCCH blind detection limiting method according to claim 3 , wherein a total blind detection limit value of each group of the at least one cell group is a ceiling integer or a flooring integer of (C*B*A/D), wherein D=D1, D2, or D3.
5. 5 . The PDCCH blind detection limiting method according to claim 1 , wherein the PDCCH blind detection limitation comprises limits on a quantity of blind detection PDCCH candidates and a quantity of control channel elements CCEs.
6. 6 . The PDCCH blind detection limiting method according to claim 2 , wherein the location of the slot group is determined in one of the following manners: determining through any N consecutive slots; forming, on a radio frame or radio subframe or slot bundling, a slot group every N slots from a first slot, wherein in a last group, a last slot of the radio frame or radio subframe or slot bundling is an end slot, and repeating, by a pattern of a slot group, on each radio frame or radio subframe or slot bundling; using a slot configured by a network or reported by the UE as a start slot or a reference slot, and determining the location of the slot group based on the start slot or the reference slot and the quantity N of slots; and determining the pattern of the slot group based on a monitoring occasion configured by a search space SS.
7. 7 . The PDCCH blind detection limiting method according to claim 6 , wherein the determining the pattern of the slot group based on a monitoring occasion configured by a search space SS comprises: repeating, by the pattern of the slot group, on each radio frame or radio subframe or slot bundling, wherein a start point of a first slot group is a first slot having a monitoring occasion in the radio frame or radio subframe or slot bundling, and N slots from the start point of the first slot group form the first slot group, wherein a start point of a next slot group is a first slot that has a monitoring occasion and that is not in any previous slot group, and N slots from the start point of the next slot group form one slot group; and sequentially performing determination on a last slot group until an end point of the radio frame or radio subframe or slot bundling.
8. 8 . The PDCCH blind detection limiting method according to claim 6 , wherein the determining the pattern of the slot group based on a monitoring occasion configured by a search space SS comprises: varying, by the pattern of the slot group, on each radio frame or radio subframe or slot bundling, wherein for each radio frame or radio subframe or slot bundling, a start point of a first slot group is a first slot having a monitoring occasion in the radio frame or radio subframe or slot bundling, and N slots from the start point of the first slot group form the first slot group; and a start point of a next slot group is a first slot that has a monitoring occasion and that is not in any previous slot group, and N slots from the start point of the next slot group form one slot group; and sequentially performing determination on a last slot group until the radio frame or radio subframe or slot bundling ends.
9. 9 . The PDCCH blind detection limiting method according to claim 6 , wherein the determining the pattern of the slot group based on a monitoring occasion configured by a search space SS comprises: using a slot configured by a network or reported by the UE as a start slot or a reference slot, and determining the pattern of the slot group from the start slot, or determining the pattern of the slot group from a start point slot spaced apart from the reference slot by a preset quantity of slots, wherein a start point of a first slot group is a first slot having a monitoring occasion after the start slot or the start point slot, and N slots from the start point of the first slot group form the first slot group; and a start point of a next slot group is a first slot that has a monitoring occasion and that is not in any previous slot group, and N slots from the start point of the next slot group form one slot group; and sequentially determining the pattern of the slot group.
10. 10 . A PDCCH blind detection limiting method performed by a network side device, comprising: sending a physical downlink control channel (PDCCH} based on PDCCH blind detection limitation, wherein the PDCCH blind detection limitation is determined in the following manner: grouping a plurality of scheduling cells into at least one cell group based on a rule, and determining, based on a result of the grouping, PDCCH blind detection limitation information corresponding to each group of the at least one cell group, wherein the plurality of scheduling cells comprise at least one first cell that supports slot group-based PDCCH blind detection limitation, and the rule comprises: grouping all scheduling cells that support the slot group-based PDCCH blind detection limitation, have a same subcarrier spacing (SCS), and have a same quantity of slots in slot groups into one cell group.
11. 11 . A terminal, comprising: a processor; and a memory storing a program or instructions, wherein the program or instructions, when executed by the processor, causes the terminal to perform the following steps: grouping a plurality of scheduling cells into at least one cell group, wherein the plurality of scheduling cells comprise at least one first cell that supports slot group-based physical downlink control channel (PDCCH) blind detection limitation; and determining, based on a result of the grouping, PDCCH blind detection limitation information corresponding to each group of the at least one cell group; wherein a rule for grouping the plurality of scheduling cells into the at least one cell group comprises: grouping all scheduling cells that support the slot group-based PDCCH blind detection limitation, have a same subcarrier spacing (SCS), and have a same quantity of slots in slot groups into one cell group.
12. 12 . The terminal according to claim 11 , wherein the program or instructions, when executed by the processor, causes the terminal to further perform the following steps: determining, in the following manner, a slot group to which the PDCCH blind detection limitation is applied and that is in the first cell: determining a quantity N of slots or a slot quantity set {Ni} contained in the slot group to which the PDCCH blind detection limitation is applied; and determining, based on the determined quantity N of slots or slot quantity set {Ni}, a location of the slot group to which the PDCCH blind detection limitation is applied.
13. 13 . The terminal according to claim 11 , wherein the program or instructions, when executed by the processor, causes the terminal to further perform the following steps: obtaining one or more of the following parameters, and determining, based on the obtained one or more parameters, the blind detection limitation information corresponding to the cell group, wherein the parameters comprise: a quantity A of cells in the cell group; a cell quantity capacity value C; a budget value B of each cell; a total quantity D1 of all scheduling cells that support the slot group-based PDCCH blind detection limitation; a quantity D2 of all scheduling cells that support the slot-based PDCCH blind detection limitation and the slot group-based PDCCH blind detection limitation; and a quantity D3 of all scheduling cells that support the slot group-based PDCCH blind detection limitation and have the same quantity of slots in the slot groups and/or have the same minimum spacing between the slot groups.
14. 14 . The terminal according to claim 13 , wherein a total blind detection limit value of each group of the at least one cell group is a ceiling integer or a flooring integer of (C*B*A/D), wherein D=D1, D2, or D3.
15. 15 . The terminal according to claim 11 , wherein the PDCCH blind detection limitation comprises limits on a quantity of blind detection PDCCH candidates PDCCH candidates and a quantity of control channel elements CCEs.
16. 16 . The terminal according to claim 12 , wherein the location of the slot group is determined in one of the following manners: determining through any N consecutive slots; forming, on a radio frame or radio subframe or slot bundling, a slot group every N slots from a first slot, wherein in a last group, a last slot of the radio frame or radio subframe or slot bundling is an end slot, and repeating, by a pattern of a slot group, on each radio frame or radio subframe or slot bundling; using a slot configured by a network or reported by the UE as a start slot or a reference slot, and determining the location of the slot group based on the start slot or the reference slot and the quantity N of slots; and determining the pattern of the slot group based on a monitoring occasion configured by a search space SS.
17. 17 . A network side device, comprising: a processor; and a memory storing a program or instructions, wherein the program or instructions, when executed by the processor, causes the network side device to perform the PDCCH blind detection limiting method according to claim 10 .
18. 18 . A non-transient computer readable storage medium, storing a program or instructions, wherein the program or instructions, when executed by a processor, performs the PDCCH blind detection limiting method according to claim 1 .
19. 19 . A non-transient computer readable storage medium, storing a program or instructions, wherein the program or instructions, when executed by a processor, performs the PDCCH blind detection limiting method according to claim 10 .

Description

CROSS-REFERENCE TO RELATED APPLICATIONS This application is a continuation of International Application No. PCT/CN2021/142059, filed on Dec. 28, 2021, which claims priority to Chinese Patent Application No. 202011629326.2 filed on Dec. 31, 2020, which are incorporated herein by reference in their entireties. TECHNICAL FIELD This application relates to the field of communication technologies, and in particular, to a PDCCH blind detection limiting method, a terminal, and a network side device. BACKGROUND When new radio (NR) runs in a high frequency band (for example, higher than 52.6 GHz), granularities of a symbol and a slot are decreased due to an increase in a subcarrier spacing (SCS). If a monitoring capability of a physical downlink control channel (PDCCH) is defined still based on a granularity per slot (per slot) or per span (per span, where one span includes a plurality of symbols), complexity of implementation by a terminal (User Equipment, UE) is greatly increased. In view of this, how to provide a method to reduce complexity of implementing PDCCH monitoring by the UE is of great significance. SUMMARY Embodiments of this application is to provide a PDCCH blind detection limiting method, a terminal, and a network side device. According to a first aspect of the present disclosure, a PDCCH blind detection limiting method is provided, applied to a terminal, which includes: grouping a plurality of scheduling cells, where the plurality of scheduling cells include at least one first cell that supports slot group-based physical downlink control channel PDCCH blind detection limitation; anddetermining, based on a grouping result, PDCCH blind detection limitation information corresponding to each group. According to a second aspect of the present disclosure, a PDCCH blind detection limiting method is provided, applied to a network side device, which includes: sending a PDCCH based on physical downlink control channel PDCCH blind detection limitation, wherethe PDCCH blind detection limitation is determined in the following manner:grouping a plurality of scheduling cells, and determining, based on a grouping result, PDCCH blind detection limitation information corresponding to each group, where the plurality of scheduling cells include at least one first cell that supports slot group-based PDCCH blind detection limitation. According to a third aspect of the present disclosure, a PDCCH blind detection limiting apparatus is provided, applied to a terminal, which includes: a grouping module, configured to group a plurality of scheduling cells, where the plurality of scheduling cells include at least one first cell that supports slot group-based physical downlink control channel PDCCH blind detection limitation; anda determining module, configured to determine, based on a grouping result, PDCCH blind detection limitation information corresponding to each group. According to a fourth aspect of the present disclosure, a PDCCH blind detection limiting apparatus is provided, applied to a network side device, which includes: a channel sending module, configured to send a PDCCH based on physical downlink control channel PDCCH blind detection limitation, wherethe PDCCH blind detection limitation is determined in the following manner:grouping a plurality of scheduling cells, and determining, based on a grouping result, PDCCH blind detection limitation information corresponding to each group, where the plurality of scheduling cells include at least one first cell that supports slot group-based PDCCH blind detection limitation. According to a fifth aspect of the present disclosure, a terminal is provided, which includes a processor, a memory, and a program or instructions stored in the memory and executable on the processor, the program or instructions, when executed by the processor, implementing the steps of the method according to the first aspect. According to a sixth aspect of the present disclosure, a network side device is provided, which includes a processor, a memory, and a program or instructions stored in the memory and executable on the processor, the program or instructions, when executed by the processor, implementing the steps of the method according to the second aspect. According to a seventh aspect of the present disclosure, a readable storage medium is provided, the readable storage medium storing a program or instructions, the program or instructions, when executed by the processor, implementing the step of the method according to the first aspect, or the step of the method according to the second aspect. According to an eighth aspect of the present disclosure, a chip is provided, including a processor and a communication interface, the communication interface being coupled to the processor, and the processor being configured to run a program or instructions of a network side device to implement the method according to the first aspect or the method according to the second aspect. According to a ninth asp