Information detection method, information sending method, terminal, and network device

1 . An information detection method, performed by a terminal, comprising:

performing blind detection of information in a candidate Physical Downlink Control Channel (PDCCH) group set,

wherein the candidate PDCCH group set is determined according to a candidate PDCCH set of each of multiple pieces of sub-search-space configured for the terminal,

wherein all PDCCH groups in the candidate PDCCH group set carry a same piece of Downlink Control Information (DCI),

wherein when a DCI is detected on a third candidate PDCCH group in the candidate PDCCH group set, a PDCCH end symbol used in a calculation of transmission timeline for DCI scheduling is any one of the following:

a last symbol of monitoring occasions comprised in multiple sub-search-spaces corresponding to the third candidate PDCCH group; or

a last symbol of the third candidate PDCCH group.

2 . The information detection method according to claim 1 , wherein the performing blind detection of information in a candidate PDCCH group set comprises:

performing blind detection of the same piece of DCI in the candidate PDCCH group set.

3 . The information detection method according to claim 1 , wherein the performing blind detection of information in a candidate PDCCH group set comprises:

performing repeated reception of information on multiple PDCCHs in at least one candidate PDCCH group.

4 . The information detection method according to claim 1 , wherein a candidate PDCCH group in the candidate PDCCH group set is constituted in at least one of the following manners:

selecting a candidate PDCCH from a candidate PDCCH set in a single piece of sub-search-space to constitute the candidate PDCCH group; or

according to a preset rule, selecting a candidate PDCCH from candidate PDCCH sets of the multiple pieces of sub-search-space to constitute the candidate PDCCH group.

5 . The information detection method according to claim 4 , wherein the preset rule comprises at least of the following:

candidate PDCCHs with a same index in all or some of the multiple pieces of sub-search-space to constitute the candidate PDCCH group;

candidate PDCCHs with a same aggregation level in all or some of the multiple pieces of sub-search-space to constitute the candidate PDCCH group;

candidate PDCCHs in all or some of the multiple pieces of sub-search-space to constitute the candidate PDCCH group based on any combination; or

candidate PDCCHs in all or some of the multiple pieces of sub-search-space to constitute the candidate PDCCH group based on cyclic shift of a candidate PDCCH index.

6 . The information detection method according to claim 1 , wherein if DCI is detected on a first candidate PDCCH group comprising multiple candidate PDCCHs in the candidate PDCCH group set, when a feedback resource of downlink transmission for DCI scheduling is calculated, a referenced Control Channel Element (CCE) index is any one of the following:

a preset CCE index of a preset PDCCH in the first candidate PDCCH group; or

a value obtained by processing a preset CCE index on all PDCCHs or some PDCCHs in the fourth candidate PDCCH group according to a first preset function,

or

a referenced quantity of CCEs is any one of the following:

a preset quantity of CCEs of a preset PDCCH in the first candidate PDCCH group; or

a value obtained by processing a preset quantity of CCEs on all PDCCHs or some PDCCHs in the first candidate PDCCH group according to a second preset function.

7 . A network device, comprising:

a memory storing a computer program; and

a processor coupled to the memory and configured to execute the computer program, wherein the computer program, when executed by the processor, causes the processor to perform:

sending information to a terminal by using a candidate Physical Downlink Control Channel (PDCCH) group set,

wherein the candidate PDCCH group set is determined according to a candidate PDCCH set of each of multiple pieces of sub-search-space configured for the terminal,

wherein all PDCCH groups in the candidate PDCCH group set carry a same piece of Downlink Control Information (DCI),

wherein when a DCI is detected on a third candidate PDCCH group in the candidate PDCCH group set, a PDCCH end symbol used in a calculation of transmission timeline for DCI scheduling is any one of the following:

a last symbol of monitoring occasions comprised in multiple sub-search-spaces corresponding to the third candidate PDCCH group; or

a last symbol of the third candidate PDCCH group.

8 . The network device according to claim 7 , wherein the sending information to a terminal comprises: sending DCI to the terminal.

9 . The network device according to claim 7 , wherein each piece of sub-search-space is constituted by each Control Resource Set (CORESET) of multiple CORESETs and a monitoring occasion corresponding to each CORESET, and the multiple CORESETs are associated with a single piece of search space;

or

each of the multiple pieces of sub-search-space is associated with one CORESET.

10 . The network device according to claim 9 , wherein when each piece of sub-search-space is constituted by each CORESET of the multiple CORESETs and the monitoring occasion corresponding to each CORESET, a candidate PDCCH set of each piece of sub-search-space is determined according to at least one of the following:

an index of sub-search-space;

an index of a CORESET; or

an index of a CORESET POOL.

11 . The network device according to claim 7 , wherein a candidate PDCCH group in the candidate PDCCH group set is constituted in at least one of the following manners:

selecting a candidate PDCCH from a candidate PDCCH set in a single piece of sub-search-space to constitute the candidate PDCCH group; or

according to a preset rule, selecting a candidate PDCCH from candidate PDCCH sets of the multiple pieces of sub-search-space to constitute the candidate PDCCH group.

12 . The network device according to claim 11 , wherein the preset rule comprises at least of the following:

candidate PDCCHs with a same index in all or some of the multiple pieces of sub-search-space to constitute the candidate PDCCH group;

candidate PDCCHs with a same aggregation level in all or some of the multiple pieces of sub-search-space to constitute the candidate PDCCH group;

candidate PDCCHs in all or some of the multiple pieces of sub-search-space to constitute the candidate PDCCH group based on any combination; or

candidate PDCCHs in all or some of the multiple pieces of sub-search-space to constitute the candidate PDCCH group based on cyclic shift of a candidate PDCCH index.

13 . A communications device, comprising: a memory, a processor, and a computer program that is stored in the memory, wherein the computer program, when executed by the processor, causes the processor to perform:

performing blind detection of information in a candidate Physical Downlink Control Channel (PDCCH) group set,

wherein the candidate PDCCH group set is determined according to a candidate PDCCH set of each of multiple pieces of sub-search-space configured for the terminal,

wherein all PDCCH groups in the candidate PDCCH group set carry a same piece of Downlink Control Information (DCI),

wherein when a DCI is detected on a third candidate PDCCH group in the candidate PDCCH group set, a PDCCH end symbol used in a calculation of transmission timeline for DCI scheduling is any one of the following:

a last symbol of monitoring occasions comprised in multiple sub-search-spaces corresponding to the third candidate PDCCH group; or

a last symbol of the third candidate PDCCH group.

14 . The communications device according to claim 13 , wherein the performing blind detection of information in a candidate PDCCH group set comprises:

performing blind detection of the same piece of DCI in the candidate PDCCH group set.

15 . The communications device according to claim 13 , wherein the performing blind detection of information in a candidate PDCCH group set comprises:

performing repeated reception of information on multiple PDCCHs in at least one candidate PDCCH group.

16 . The communications device according to claim 13 , wherein a candidate PDCCH group in the candidate PDCCH group set is constituted in at least one of the following manners:

selecting a candidate PDCCH from a candidate PDCCH set in a single piece of sub-search-space to constitute the candidate PDCCH group; or

according to a preset rule, selecting a candidate PDCCH from candidate PDCCH sets of the multiple pieces of sub-search-space to constitute the candidate PDCCH group.

17 . The communications device according to claim 16 , wherein the preset rule comprises at least of the following:

candidate PDCCHs with a same index in all or some of the multiple pieces of sub-search-space to constitute the candidate PDCCH group;

candidate PDCCHs with a same aggregation level in all or some of the multiple pieces of sub-search-space to constitute the candidate PDCCH group;

candidate PDCCHs in all or some of the multiple pieces of sub-search-space to constitute the candidate PDCCH group based on any combination; or

candidate PDCCHs in all or some of the multiple pieces of sub-search-space to constitute the candidate PDCCH group based on cyclic shift of a candidate PDCCH index.

18 . The communications device according to claim 13 , wherein if DCI is detected on a first candidate PDCCH group comprising multiple candidate PDCCHs in the candidate PDCCH group set, when a feedback resource of downlink transmission for DCI scheduling is calculated, a referenced Control Channel Element (CCE) index is any one of the following:

a preset CCE index of a preset PDCCH in the first candidate PDCCH group; or

a value obtained by processing a preset CCE index on all PDCCHs or some PDCCHs in the fourth candidate PDCCH group according to a first preset function,

or

a referenced quantity of CCEs is any one of the following:

a preset quantity of CCEs of a preset PDCCH in the first candidate PDCCH group; or

a value obtained by processing a preset quantity of CCEs on all PDCCHs or some PDCCHs in the first candidate PDCCH group according to a second preset function.