CN113922922A

CN113922922A - Communication method, device and system

Info

Publication number: CN113922922A
Application number: CN202010664508.7A
Authority: CN
Inventors: 马蕊香; 官磊
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2020-07-10
Filing date: 2020-07-10
Publication date: 2022-01-11
Also published as: WO2022007949A1

Abstract

The embodiment of the application provides a communication method, a communication device and a communication system, relates to the field of communication, and can solve the technical problem that the reliability of a PDCCH (physical downlink control channel) and the network transmission delay are influenced because the blind detection capability cannot be reasonably determined. The method comprises the following steps: the terminal determines a plurality of search spaces corresponding to at least two search space groups; the at least two search space groups comprise a first search space group and a second search space group, the first search space group is used for the terminal to perform PDCCH blind detection in a first time period, and the second search space group is used for the terminal to perform PDCCH blind detection in a second time period; the terminal determines a first blind detection capability of each time window in a first time period according to a part of the at least two search space groups; determining a second blind detection capability of each time window in a second time period according to a part of the at least two search space groups; and carrying out PDCCH blind detection in a first time period according to the first blind detection capability, and carrying out PDCCH blind detection in a second time period according to the second blind detection capability.

Description

Communication method, device and system

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a communication method, apparatus, and system.

Background

In a New Radio (NR) communication system, a terminal may perform blind detection through a Physical Downlink Control Channel (PDCCH) to obtain Downlink Control Information (DCI) carried in the PDCCH.

When performing PDCCH blind detection, the terminal may determine a plurality of PDCCH blind detection occasions according to a control resource set (CORESET) and a search space set configured by the network device, and perform PDCCH blind detection based on the PDCCH blind detection occasions. In order to avoid that the power consumption of the terminal is large because the terminal performs PDCCH blind detection according to the PDCCH blind detection opportunity without limit, the capability of the terminal for performing PDCCH blind detection is defined, namely the PDCCH blind detection is performed on the PDCCH blind detection opportunity within the range of the blind detection capability of the terminal; the blind detection capability may include a maximum number of non-overlapping Control Channel Elements (CCEs) in a time unit and/or a maximum number of PDCCH candidates for blind detection.

However, if the blind detection capability is too large, the power consumption of the terminal is large; if the blind detection capability is small, the number of the largest non-overlapping CCEs for the terminal to perform PDCCH blind detection in a time unit is reduced, so that the corresponding aggregation level of the PDCCH is small, and the reliability of the PDCCH is reduced; meanwhile, the number of candidate PDCCHs for performing PDCCH blind detection in a time unit by the terminal is also reduced, the terminal cannot detect the PDCCH in time, cannot schedule a Physical Downlink Shared Channel (PDSCH) or a Physical Uplink Shared Channel (PUSCH) in time, affects network transmission delay, and how to reasonably determine blind detection capability becomes an urgent problem to be solved.

Disclosure of Invention

In view of the above, embodiments of the present invention provide a communication method, apparatus and system, which can improve the reliability of PDCCH detection.

In a first aspect, a communication method is provided, and the method includes: the terminal determines a plurality of search spaces corresponding to at least two search space groups; the terminal determines the first blind detection capability of each time window in the first time period according to partial search space groups in the at least two search space groups; determining a second blind detection capability of each time window in a second time period according to a part of the at least two search space groups; the number of time domain symbols contained in the time window is less than that of time domain symbols contained in the time slot; and the terminal performs PDCCH blind detection in a first time period according to the first blind detection capability and performs PDCCH blind detection in a second time period according to the second blind detection capability.

Based on the first aspect, when the terminal is configured with at least two search space groups at the same time, the terminal may determine the blind detection capability of each time window in each time period according to different or the same partial search space groups in the at least two search space groups. The condition that the determined blind detection capability is too small due to the fact that the terminal determines the blind detection capability of each time window in each time period according to all the search space groups is avoided. The terminal can reasonably select part of the search space groups, determine the blind detection capability of each time window in each time period, enable the corresponding aggregation level of the PDCCH to be larger, improve the reliability of the PDCCH, meanwhile, enable the terminal to timely detect the PDCCH sent by the network equipment, timely schedule the PDSCH or the PUSCH according to the PDCCH, and shorten the network transmission delay.

In one possible design, the terminal determines a first blind detection capability of each time window in a first time period according to the first search space group; and determining a second blind detection capability of each time window in a second time period according to the second search space group.

Based on the possible design, the terminal determines the blind detection capability of each time window in each time period according to the search space group corresponding to each time period, and can reasonably determine the blind detection capability of each time window in each time period.

In one possible design, the terminal determines a first blind detection capability of each time window in a first time period according to the first search space group; and determining the first blind detection capability as a second blind detection capability for each time window in a second time period.

Based on the possible design, the terminal can determine the first blind detection capability according to the first search space group and determine the first blind detection capability as the second blind detection capability of each time window in the second time period, so that the blind detection capability of each time window calculated by the terminal in each time period is avoided, and the power consumption of the terminal is reduced.

In one possible design, the PDCCH blind detection occasions in the first search space group are more than those in the second search space group; or the search space group identification corresponding to the first search space group is smaller than the second search space group; or the first search space group is the search space group indicated by the first indication information; the terminal receives first indication information from the network equipment.

Based on the possible design, when the terminal adopts a mode of determining the first blind detection capability as the second blind detection capability, and the terminal calculates the first blind detection capability according to the first search space group, the search space group with more PDCCH blind detection opportunities can be determined as the first search space group, so that the situation that the blind detection capability determined according to the search space group with less PDCCH blind detection opportunities is larger, and the power consumption of the terminal is larger is avoided. In addition, the terminal may use the search space group with the smaller search space group identifier as the first search space group, or use the search space group indicated in the received first indication information as the first search space group, which is not limited.

In one possible design, the terminal determines at least one time window corresponding to each time slot in a first time period according to a first search space group, a control resource set corresponding to the first search space group, and at least one terminal capability; each of the at least one terminal capability is used to indicate a blind detection capability parameter supported by the terminal; the blind detection capability parameter comprises a minimum value X of an interval between starting time domain symbols of every two continuous time windows supported by the terminal and a maximum time domain symbol number Y of every time window supported by the terminal; and the terminal determines the first blind detection capability of at least one time window corresponding to each time slot in the first time period according to at least one terminal capability and at least one time window corresponding to each time slot.

Based on the possible design, taking the example that the terminal determines the first blind detection capability of each time window in the first time period according to the first search space group as an example, the terminal may determine the first blind detection capability of each time window in the first time period according to the first search space group, the control resource set corresponding to the first search space group, and at least one terminal capability, and provide a feasible scheme for the terminal to determine the blind detection capability of the time window according to the search space group.

In one possible design, the terminal sends at least one terminal capability to the network device.

Based on the possible design, the terminal may send at least one terminal capability to the network device, so that the network device determines the blind detection capability of each time window in each time period according to the at least one terminal capability, and sends the PDCCH to the terminal according to the blind detection capability.

In one possible design, the terminal performs PDCCH blind detection in a first time period according to a first search space group; and if the terminal receives DCI indicating that the terminal is switched to the second search space group in the first time period, the terminal performs PDCCH blind detection according to the second search space group in the second time period.

Based on the possible design, when the terminal receives the DCI instructing the terminal to switch to the second search space group in the first time period, the terminal may perform PDCCH blind detection according to the second search space group in the second time period, thereby providing a feasible scheme for the terminal to switch the search space group.

In one possible design, the DCI includes second indication information; the second indication information comprises a search space group identification corresponding to the second search space group; or, the DCI includes third indication information; the third indication information comprises channel occupation time, and the terminal is switched to the second search space group after the channel occupation time is overtime.

Based on the possible design, the DCI may indicate that the terminal needs to switch to the second search space group by carrying a search space group identifier corresponding to the second search space group; or the terminal can be switched to the second search space group after the channel occupation time is overtime by carrying the channel occupation time.

In one possible design, the terminal performs PDCCH blind detection in a second time period according to the second search space group, and starts a timer; and after the timer is overtime, the terminal performs PDCCH blind detection within a first time period according to the first search space group.

Based on the possible design, the terminal can also realize the switching of the search space groups by adopting a timer mode, the terminal can start the timer when using a certain search space group to carry out PDCCH blind detection, and the search space group is switched after the timer is overtime, so that another feasible scheme is provided for the terminal to switch the search space group.

In one possible design, the blind detection capability for each time window includes the maximum number of non-overlapping CCEs per time window and/or the maximum number of PDCCH candidates for blind detection for the time window.

Based on the possible design, the blind detection capability of the time window may refer to the maximum number of non-overlapping CCEs of the time window, may also refer to the maximum number of candidate PDCCHs for blind detection of the time window, may also refer to the maximum number of non-overlapping CCEs of the time window and the maximum number of candidate PDCCHs for blind detection of the time window, and is not limited.

In a second aspect, there is provided a communication device, wherein the communication device may implement the functions performed by the terminal in the first aspect or the possible designs of the first aspect, and the functions may be implemented by executing corresponding software through hardware. The hardware or software comprises one or more modules corresponding to the functions. Such as a processing module. A processing module for determining a plurality of search spaces corresponding to at least two search space groups; the at least two search space groups comprise a first search space group used for the processing module to perform PDCCH blind detection in a first time period and a second search space group used for the processing module to perform PDCCH blind detection in a second time period; the processing module is further configured to determine a first blind detection capability of each time window in a first time period according to a partial search space group of the at least two search space groups; determining a second blind detection capability of each time window in a second time period according to a part of the at least two search space groups; the number of time domain symbols contained in the time window is less than that of time domain symbols contained in the time slot; and the processing module is also used for carrying out PDCCH blind detection in a first time period according to the first blind detection capability and carrying out PDCCH blind detection in a second time period according to the second blind detection capability.

In a specific implementation manner of the communication apparatus, with reference to the behavioral function of the terminal in the communication method provided by the first aspect or any one of the possible designs of the first aspect, based on the communication apparatus described in the second aspect, when the terminal is configured with at least two search space groups at the same time, the terminal may determine the blind detection capability of each time window in each time period according to different or the same partial search space groups in the at least two search space groups. The condition that the determined blind detection capability is too small due to the fact that the terminal determines the blind detection capability of each time window in each time period according to all the search space groups is avoided. The terminal can reasonably select part of the search space groups, determine the blind detection capability of each time window in each time period, enable the corresponding aggregation level of the PDCCH to be larger, improve the reliability of the PDCCH, meanwhile, enable the terminal to timely detect the PDCCH sent by the network equipment, timely schedule the PDSCH or the PUSCH according to the PDCCH, and shorten the network transmission delay.

In one possible design, the processing module is specifically configured to determine, according to the first search space group, a first blind detection capability of each time window in the first time period; and determining a second blind detection capability of each time window in a second time period according to the second search space group.

In one possible design, the processing module is specifically configured to determine, according to the first search space group, a first blind detection capability of each time window in the first time period; and determining the first blind detection capability as a second blind detection capability for each time window in a second time period.

In one possible design, the PDCCH blind detection occasions in the first search space group are more than those in the second search space group; or the search space group identification corresponding to the first search space group is smaller than the second search space group; or the first search space group is the search space group indicated by the first indication information; the communication device further comprises a receiving module, which is used for receiving the first indication information from the network equipment.

In one possible design, the processing module is further configured to determine, according to the first search space group, the control resource set corresponding to the first search space group, and the at least one terminal capability, at least one time window corresponding to each time slot in the first time period; each of the at least one terminal capability is used to indicate a blind detection capability parameter supported by the terminal; the blind detection capability parameter comprises a minimum value X of an interval between starting time domain symbols of every two continuous time windows supported by the terminal and a maximum time domain symbol number Y of every time window supported by the terminal; the processing module is further configured to determine, according to the at least one terminal capability and the at least one time window corresponding to each time slot, a first blind detection capability of the at least one time window corresponding to each time slot in the first time period.

In one possible design, the communication apparatus further includes a sending module, and the sending module is configured to send the at least one terminal capability to the network device.

In one possible design, the processing module is configured to perform PDCCH blind detection in a first time period according to a first search space group; and if the receiving module receives DCI indicating that the terminal is switched to the second search space group in the first time period, the processing module is used for carrying out PDCCH blind detection according to the second search space group in the second time period.

In one possible design, the DCI includes second indication information; the second indication information comprises a search space group identification corresponding to the second search space group; or, the DCI includes third indication information; the third indication information comprises channel occupation time, and the processing module is used for switching to the second search space group after the channel occupation time is overtime.

In one possible design, the processing module is configured to perform PDCCH blind detection in a second time period according to the second search space group, and start a timer; and the processing module is further used for carrying out PDCCH blind detection in a first time period according to the first search space group after the timer is overtime.

In a third aspect, a communication apparatus is provided, which may be a terminal or a chip in a terminal or a system on a chip. The communication device may implement the functions performed by the terminal in the aspects described above or in each of the possible designs, which functions may be implemented by hardware. In one possible design, the communication device may include: a processor. The processor may be adapted to support the communication device for performing the functions referred to in the first aspect above or in any one of the possible designs of the first aspect. For example: the processor may be configured to determine a plurality of search spaces corresponding to the at least two search space groups; the at least two search space groups comprise a first search space group used for the processing module to perform PDCCH blind detection in a first time period and a second search space group used for the processing module to perform PDCCH blind detection in a second time period; the processor may be further configured to determine a first blind detection capability for each time window in a first time period based on a partial search space group of the at least two search space groups; determining a second blind detection capability of each time window in a second time period according to a part of the at least two search space groups; the number of time domain symbols contained in the time window is less than that of time domain symbols contained in the time slot; the processor may be further configured to perform PDCCH blind detection in a first time period according to the first blind detection capability, and perform PDCCH blind detection in a second time period according to the second blind detection capability. In yet another possible design, the communication device may further include a memory, the memory for storing computer-executable instructions and data necessary for the communication device. The processor executes the computer executable instructions stored by the memory when the communication device is operating to cause the communication device to perform the communication method as set forth in the first aspect or any one of the possible designs of the first aspect.

The specific implementation manner of the communication device may refer to the behavior function of the terminal in the communication method provided by the first aspect or any one of the possible designs of the first aspect.

In a fourth aspect, a communication method is provided, the method comprising: the terminal determines a plurality of search spaces corresponding to at least two search space groups, wherein the at least two search space groups comprise a first search space group and a second search space group, the first search space group is used for the terminal to perform PDCCH blind detection in a first time period, and the second search space group is used for the terminal to perform PDCCH blind detection in a second time period; the terminal determines a first blind detection capability of each time window in a first time period according to a part of search space groups in at least two search space groups; the number of time domain symbols contained in the time window is less than that of time domain symbols contained in the time slot; the terminal performs PDCCH blind detection within a first time period according to the first blind detection capability; and carrying out PDCCH blind detection in the second time period according to the second blind detection capability of each time slot in the second time period.

According to the fourth aspect, when the terminal is configured with at least two search space groups simultaneously, the terminal may determine the blind detection capability of each time window in at least one time period according to the same or different partial search space groups in the at least two search space groups. The condition that the determined blind detection capability is too small due to the fact that the terminal determines the blind detection capability of each time window in each time period according to all the search space groups is avoided. The terminal may select a portion of the search space groups to determine the blind detection capability of each time window in at least one time period. In addition, the terminal may also determine the blind detection capability of each time slot in the additional portion of the time period based on the time slot. When the terminal determines the blind detection capability corresponding to each time period, the time window and the time slot are used in a combined manner, so that the terminal can reasonably determine the blind detection capability corresponding to each time period, reasonably determine the aggregation level corresponding to the PDCCH, improve the reliability of the PDCCH, meanwhile, the terminal can also timely detect the PDCCH sent by the network equipment, timely schedule the PDSCH or the PUSCH according to the PDCCH, and shorten the network transmission delay.

In one possible design, the terminal determines the blind detection capability of each time window in the first time period according to the first search space group.

Based on the possible design, when the terminal determines the blind detection capability of each time window in each time period by adopting a part of search space groups, the blind detection capability of each time window in the time period is determined according to the search space group corresponding to each time period, and the blind detection capability of each time window in each time period can be reasonably determined.

Based on the possible design, the terminal can determine the search space group with more PDCCH blind detection opportunities as a first search space group, and determine the first blind detection capability of each time window in the first time period according to the first search space group, so as to avoid the waste of the blind detection capability caused by the small blind detection capability determined based on the time slot in the first time period. In addition, the terminal may use the search space group with the smaller search space group identifier as the first search space group, or use the search space group indicated in the received first indication information as the first search space group, which is not limited.

In one possible design, the terminal performs PDCCH blind detection in a first time period according to a first search space group; if the terminal receives DCI within the first time period, and the DCI instructs the terminal to switch to the second search space group; and the terminal performs PDCCH blind detection according to the second search space group in a second time period.

In one possible design, the first blind detection capability of each time window is the maximum number of non-overlapping CCEs of each time window and/or the maximum number of candidate PDCCHs for blind detection of the time window; the second blind detection capability of each slot is the maximum number of non-overlapping CCEs per slot and/or the maximum number of candidate PDCCHs for blind detection per slot.

Based on the possible design, the blind detection capability of the time window may refer to the maximum number of non-overlapping CCEs of the time window, may also refer to the maximum number of candidate PDCCHs for blind detection of the time window, and may also refer to the maximum number of non-overlapping CCEs of the time window and the maximum number of candidate PDCCHs for blind detection of the time window. The blind detection capability of the time slot may refer to the maximum number of non-overlapping CCEs of the time slot, may also refer to the maximum number of PDCCH candidates for blind detection of the time slot, and may also refer to the maximum number of non-overlapping CCEs of the time slot and the maximum number of PDCCH candidates for blind detection of the time slot, without limitation.

In a fifth aspect, a communication device is provided, where the communication device may implement the functions performed by the terminal in the above fourth aspect or possible designs of the fourth aspect, and the functions may be implemented by executing corresponding software through hardware. The hardware or software comprises one or more modules corresponding to the functions. Such as a processing module. The processing module is used for determining a plurality of search spaces corresponding to at least two search space groups, wherein the at least two search space groups comprise a first search space group and a second search space group, the first search space group is used for the terminal to perform PDCCH blind detection in a first time period, and the second search space group is used for the terminal to perform PDCCH blind detection in a second time period; the processing module is further configured to determine a first blind detection capability of each time window in a first time period according to a partial search space group of the at least two search space groups; the number of time domain symbols contained in the time window is less than that of time domain symbols contained in the time slot; the processing module is further used for carrying out PDCCH blind detection within a first time period according to the first blind detection capability; and carrying out PDCCH blind detection in the second time period according to the second blind detection capability of each time slot in the second time period.

In a specific implementation manner of the communication apparatus, referring to the behavioral function of the terminal in the communication method provided by any one of the possible designs of the fourth aspect or the fourth aspect, based on the communication apparatus of the fifth aspect, when the terminal is configured with at least two search space groups at the same time, the terminal may determine the blind detection capability of each time window in at least one time period according to the same or different partial search space groups in the at least two search space groups. The condition that the determined blind detection capability is too small due to the fact that the terminal determines the blind detection capability of each time window in each time period according to all the search space groups is avoided. The terminal may select a portion of the search space groups to determine the blind detection capability of each time window in at least one time period. In addition, the terminal may also determine the blind detection capability of each time slot in the additional portion of the time period based on the time slot. When the terminal determines the blind detection capability corresponding to each time period, the time window and the time slot are used in a combined manner, so that the terminal can reasonably determine the blind detection capability corresponding to each time period, reasonably determine the aggregation level corresponding to the PDCCH, improve the reliability of the PDCCH, meanwhile, the terminal can also timely detect the PDCCH sent by the network equipment, timely schedule the PDSCH or the PUSCH according to the PDCCH, and shorten the network transmission delay.

In one possible design, the processing module is specifically configured to determine a blind detection capability of each time window in the first time period according to the first search space group.

In one possible design, the processing module is configured to perform PDCCH blind detection in a first time period according to a first search space group; if the receiving module receives DCI in the first time period, and the DCI indicates that the terminal is switched to the second search space group; and the processing module is configured to perform PDCCH blind detection according to the second search space group in a second time period.

In one possible design, the DCI includes second indication information; the second indication information comprises a search space group identification corresponding to the second search space group; or, the DCI includes third indication information; the third indication information comprises channel occupation time, and the processing module is further used for switching to the second search space group after the channel occupation time is overtime.

In a sixth aspect, a communication apparatus is provided, which may be a terminal or a chip in a terminal or a system on a chip. The communication device may implement the functions performed by the terminal in the aspects described above or in each of the possible designs, which functions may be implemented by hardware. In one possible design, the communication device may include: a processor. The processor may be configured to determine a plurality of search spaces corresponding to at least two search space groups, where the at least two search space groups include a first search space group and a second search space group, the first search space group is used for the terminal to perform PDCCH blind detection in a first time period, and the second search space group is used for the terminal to perform PDCCH blind detection in a second time period; the processor may be further configured to determine a first blind detection capability for each time window in a first time period based on a partial search space group of the at least two search space groups; the number of time domain symbols contained in the time window is less than that of time domain symbols contained in the time slot; the processor may be further configured to perform PDCCH blind detection within a first time period according to the first blind detection capability; and carrying out PDCCH blind detection in the second time period according to the second blind detection capability of each time slot in the second time period. In yet another possible design, the communication device may further include a memory, the memory for storing computer-executable instructions and data necessary for the communication device. The processor executes the computer executable instructions stored by the memory when the communication device is operating, so as to cause the communication device to perform the communication method according to any one of the possible designs of the fourth aspect or the fourth aspect.

The specific implementation manner of the communication apparatus may refer to the behavioral function of the terminal in the communication method provided by any one of the possible designs of the fourth aspect or the fourth aspect.

In a seventh aspect, a communication method is provided, where the method includes: the network equipment determines the first blind detection capability of each time window in a first time period according to a partial search space group in at least two search space groups of the terminal, and determines the second blind detection capability of each time window in a second time period according to the partial search space group in the at least two search space groups; the at least two search space groups comprise a first search space group and a second search space group, the first search space group is used for the network equipment to send the PDCCH to the terminal in a first time period, and the second search space group is used for the network equipment to send the PDCCH to the terminal in a second time period; the number of time domain symbols contained in the time window is less than that of time domain symbols contained in the time slot; and the network equipment sends the PDCCH to the terminal in a first time period according to the first blind detection capability, and sends the PDCCH to the terminal in a second time period according to the second blind detection capability.

Based on the seventh aspect, when the terminal is configured with at least two search space groups at the same time, the network device may determine the blind detection capability of each time window in each time period according to different or the same partial search space groups in the at least two search space groups corresponding to the terminal. The network equipment is prevented from determining the blind detection capability of each time window in each time period according to all the search space groups, so that the determined blind detection capability is too small. The network equipment determines the blind detection capability of each time window in each time period by reasonably selecting part of search space groups, so that the network equipment can send the PDCCH by using a reasonable aggregation level, the reliability of the PDCCH is improved, meanwhile, the network equipment can send the PDCCH to the terminal in time according to the determined blind detection capability, so that the terminal can detect the PDCCH sent by the network equipment in time, and can schedule the PDSCH or the PUSCH in time according to the PDCCH, and the network transmission delay is shortened.

In one possible design, the network device determines a first blind detection capability of each time window in a first time period according to the first search space group; and the network equipment determines the second blind detection capability of each time window in the second time period according to the second search space group.

Based on the possible design, the network device determines the blind detection capability of each time window in each time period according to the search space group corresponding to each time period, and can reasonably determine the blind detection capability of each time window in each time period.

In one possible design, the network device determines a first blind detection capability of each time window in a first time period according to the first search space group; the network device determines the first blind detection capability as a second blind detection capability of each time window in a second time period.

Based on the possible design, the network device may determine the first blind detection capability according to the first search space group, and determine the first blind detection capability as the second blind detection capability of each time window in the second time period, thereby avoiding that the network device calculates the blind detection capability of each time window in each time period, and reducing the power consumption of the terminal.

In one possible design, the PDCCH blind detection occasions in the first search space group are more than those in the second search space group; or the search space group identification corresponding to the first search space group is smaller than the second search space group; alternatively, the first search space group is a search space group indicated by the network device.

Based on the possible design, when the network device adopts a mode of determining the first blind detection capability as the second blind detection capability, and the network device calculates the first blind detection capability according to the first search space group, the network device can determine the search space group with more PDCCH blind detection opportunities as the first search space group, so that the situation that the blind detection capability determined according to the search space group with less PDCCH blind detection opportunities is larger, and the power consumption of the terminal is larger is avoided. In addition, the network device may also use the search space group with the smaller search space group identifier as the first search space group, or use the search space group indicated by the network device as the first search space group, which is not limited.

In one possible design, the network device determines, according to the first search space group, the control resource set corresponding to the first search space group, and at least one terminal capability, at least one time window corresponding to each time slot within a first time period; wherein each of the at least one terminal capability is used to indicate a blind detection capability parameter supported by the terminal; the blind detection capability parameter comprises a minimum value X of an interval between starting time domain symbols of every two continuous time windows supported by the terminal and a maximum time domain symbol number Y of every time window supported by the terminal; the network equipment determines a first blind detection capability of at least one time window corresponding to each time slot in a first time period according to at least one terminal capability and at least one time window corresponding to each time slot.

Based on the possible design, taking the example that the network device determines the first blind detection capability of each time window in the first time period according to the first search space group as an example, the network device may determine the first blind detection capability of each time window in the first time period according to the first search space group, the control resource set corresponding to the first search space group, and at least one terminal capability, and provide a feasibility scheme for the network device to determine the blind detection capability of the time window according to the search space group.

In one possible design, the network device receives at least one terminal capability from the terminal.

Based on the possible design, the network device may determine the blind detection capability of each time window in each time period according to at least one terminal capability sent by the terminal, and send the PDCCH to the terminal according to the blind detection capability.

In one possible design, the network device sends a PDCCH to the terminal within a first time period according to the first search space group; if the network equipment sends DCI to the terminal in the first time period, and the DCI instructs the terminal to switch to the second search space group; the network device sends the PDCCH to the terminal according to the second search space group in a second time period.

Based on the possible design, when the network device sends DCI instructing the terminal to switch to the second search space to the terminal, the network device may send the PDCCH to the terminal according to the second search space group in the second time period, which provides a feasible scheme for the network device to switch the search space group.

In one possible design, the DCI includes second indication information; the second indication information comprises a search space group identifier corresponding to the second search space group; or, the DCI includes third indication information; and the third indication information comprises channel occupation time, so that the terminal is switched to the second search space group after the channel occupation time is overtime.

In one possible design, the network device sends the PDCCH to the terminal within a second time period according to the second search space group, and starts a timer; and after the timer is overtime, the network equipment sends the PDCCH to the terminal within a first time period according to the first search space group.

Based on the possible design, the network device may also implement the switching of the search space group by using a timer, and the network device may start the timer when using a certain search space group to send the PDCCH to the terminal, and switch the search space group after the timer expires, thereby providing another feasible scheme for the network device to switch the search space group.

In one possible design, the blind detection capability of each time window includes the maximum number of non-overlapping Control Channel Elements (CCEs) of each time window and/or the maximum number of candidate PDCCHs for blind detection of each time window.

In an eighth aspect, a communication apparatus is provided, where the communication apparatus may implement the functions performed by the network device in the seventh aspect or the possible designs of the seventh aspect, and the functions may be implemented by executing corresponding software through hardware. The hardware or software comprises one or more modules corresponding to the functions. Such as a processing module, a sending module. The processing module is used for determining the first blind detection capability of each time window in a first time period according to a part of search space groups in at least two search space groups of the terminal, and determining the second blind detection capability of each time window in a second time period according to the part of search space groups in the at least two search space groups; the at least two search space groups comprise a first search space group and a second search space group, the first search space group is used for the network equipment to send the PDCCH to the terminal in a first time period, and the second search space group is used for the network equipment to send the PDCCH to the terminal in a second time period; the number of time domain symbols contained in the time window is less than that of time domain symbols contained in the time slot; and the sending module is used for sending the PDCCH to the terminal in a first time period according to the first blind detection capability and sending the PDCCH to the terminal in a second time period according to the second blind detection capability.

In a specific implementation manner of the communication apparatus, with reference to the behavioral function of the network device in the communication method provided by any one of the seventh aspect and the seventh aspect, based on the communication apparatus described in the eighth aspect, when the terminal is configured with at least two search space groups at the same time, the network device may determine the blind detection capability of each time window in each time period according to different or the same partial search space groups in the at least two search space groups corresponding to the terminal. The network equipment is prevented from determining the blind detection capability of each time window in each time period according to all the search space groups, so that the determined blind detection capability is too small. The network equipment determines the blind detection capability of each time window in each time period by reasonably selecting part of search space groups, so that the network equipment can send the PDCCH by using a reasonable aggregation level, the reliability of the PDCCH is improved, meanwhile, the network equipment can send the PDCCH to the terminal in time according to the determined blind detection capability, so that the terminal can detect the PDCCH sent by the network equipment in time, and can schedule the PDSCH or the PUSCH in time according to the PDCCH, and the network transmission delay is shortened.

In one possible design, the processing module is specifically configured to determine, according to the first search space group, a first blind detection capability of each time window in the first time period; the first blind detection capability is determined as a second blind detection capability for each time window within a second time period.

In one possible design, the PDCCH blind detection occasions in the first search space group are more than those in the second search space group; or the search space group identification corresponding to the first search space group is smaller than the second search space group; alternatively, the first search space group is a search space group indicated by the processing module.

Based on the possible design, when the network device adopts a mode of determining the first blind detection capability as the second blind detection capability, and the network device calculates the first blind detection capability according to the first search space group, the network device can determine the search space group with more PDCCH blind detection opportunities as the first search space group, so that the blind detection capability determined according to the search space group with less PDCCH blind detection opportunities is prevented from being larger, and the blind detection capability is prevented from being wasted. In addition, the network device may also use the search space group with the smaller search space group identifier as the first search space group, or use the search space group indicated by the network device as the first search space group, which is not limited.

In one possible design, the processing module is further configured to determine, according to the first search space group, the control resource set corresponding to the first search space group, and the at least one terminal capability, at least one time window corresponding to each time slot in the first time period; wherein each of the at least one terminal capability is used to indicate a blind detection capability parameter supported by the terminal; the blind detection capability parameter comprises a minimum value X of an interval between starting time domain symbols of every two continuous time windows supported by the terminal and a maximum time domain symbol number Y of every time window supported by the terminal; the processing module is further configured to determine, according to the at least one terminal capability and the at least one time window corresponding to each time slot, a first blind detection capability of the at least one time window corresponding to each time slot in the first time period.

In one possible design, the communication device further includes a receiving module configured to receive at least one terminal capability from the terminal.

In one possible design, the sending module is configured to send a PDCCH to the terminal within a first time period according to the first search space group; if the sending module sends DCI to the terminal in the first time period, and the DCI indicates the terminal to switch to the second search space group; the PDCCH is transmitted to the terminal according to the second search space group for a second time period.

In one possible design, the DCI includes second indication information; the second indication information comprises a search space group identification corresponding to the second search space group; or, the DCI includes third indication information; the third indication information includes channel occupation time, so that the terminal is switched to the second search space group after the channel occupation time is overtime.

In one possible design, the processing module is configured to start a timer when the sending module sends the PDCCH to the terminal within a second time period according to the second search space group; and the sending module is further used for sending the PDCCH to the terminal within a first time period according to the first search space group after the timer is overtime.

In a ninth aspect, a communication apparatus is provided, which may be a network device or a chip or a system on a chip in a network device. The communication means may implement the functions performed by the network device in the aspects and possible designs described above, which functions may be implemented by hardware. In one possible design, the communication device may include: a processor and a transceiver. The processor may be configured to determine a first blind detection capability of each time window in a first time period according to a partial search space group of at least two search space groups of the terminal, and determine a second blind detection capability of each time window in a second time period according to a partial search space group of the at least two search space groups; the at least two search space groups comprise a first search space group and a second search space group, the first search space group is used for the network equipment to send the PDCCH to the terminal in a first time period, and the second search space group is used for the network equipment to send the PDCCH to the terminal in a second time period; the number of time domain symbols contained in the time window is less than that of time domain symbols contained in the time slot; the transceiver may be configured to send the PDCCH to the terminal in a first time period according to the first blind detection capability, and send the PDCCH to the terminal in a second time period according to the second blind detection capability. In yet another possible design, the communication device may further include a memory, the memory for storing computer-executable instructions and data necessary for the communication device. When the communication device is operating, the processor executes the computer-executable instructions stored in the memory to cause the communication device to perform the communication method according to any one of the possible designs of the seventh aspect or the seventh aspect.

The specific implementation manner of the communication apparatus may refer to the behavioral function of the network device in the communication method provided in any one of the seventh aspect and the seventh aspect.

In a tenth aspect, there is provided a communication method, the method comprising: the network equipment determines the first blind detection capability of each time window in a first time period according to a part of search space groups in at least two search space groups corresponding to the terminal; the at least two search space groups comprise a first search space group and a second search space group, the first search space group is used for the network equipment to send a Physical Downlink Control Channel (PDCCH) to the terminal in a first time period, and the second search space group is used for the network equipment to send the PDCCH to the terminal in a second time period; the number of time domain symbols contained in the time window is less than that of time domain symbols contained in the time slot; the network equipment sends a PDCCH to the terminal in a first time period according to the first blind detection capability; and sending the PDCCH to the terminal in the second time period according to the second blind detection capability of each time slot in the second time period.

Based on the tenth aspect, when the terminal is configured with at least two search space groups at the same time, the network device may determine the blind detection capability of each time window in at least one time period according to the same or different partial search space groups in the at least two search space groups corresponding to the terminal. The network equipment is prevented from determining the blind detection capability of each time window in each time period according to all the search space groups, so that the determined blind detection capability is too small. The network device may select a portion of the search space groups to determine a blind detection capability for each time window in at least one time segment. In addition, the network device may also determine a blind detection capability for each time slot in the additional portion of the time period based on the time slot. The network equipment determines the blind detection capability corresponding to each time period by combining the time window and the time slot, so that the network equipment can send the PDCCH by using a reasonable aggregation level, the reliability of the PDCCH is improved, meanwhile, the network equipment can send the PDCCH to the terminal in time according to the determined blind detection capability, so that the terminal can detect the PDCCH sent by the network equipment in time, and can schedule the PDSCH or the PUSCH in time according to the PDCCH, and the network transmission delay is shortened.

In one possible design, the network device determines a first blind detection capability for each time window in the first time period according to the first search space group.

Based on the possible design, when the network device determines the blind detection capability of each time window in each time period by using a part of search space groups, the network device determines the blind detection capability of each time window in the time period according to the search space group corresponding to each time period, and can reasonably determine the blind detection capability of each time window in each time period.

Based on the possible design, the network device may determine a search space group with a large number of PDCCH blind detection occasions as a first search space group, and determine the first blind detection capability of each time window in the first time period according to the first search space group, so as to avoid the waste of the blind detection capability due to the small blind detection capability determined based on the time slot in the first time period. In addition, the network device may also use the search space group with the smaller search space group identifier as the first search space group, or use the search space group indicated in the received first indication information as the first search space group, which is not limited.

In one possible design, the network device sends a PDCCH to the terminal within a first time period according to the first search space group; if the network equipment sends downlink control information DCI to the terminal in the first time period, and the DCI instructs the terminal to switch to the second search space group; the network device sends the PDCCH to the terminal according to the second search space group in a second time period.

In one possible design, the first blind detection capability of each time window is the number of the largest non-overlapping Control Channel Elements (CCEs) of each time window and/or the number of candidate PDCCHs for the largest blind detection of each time window; the second blind detection capability of each time slot is the maximum number of the non-overlapping Control Channel Elements (CCEs) of each time slot and/or the maximum number of the candidate PDCCHs for blind detection of each time slot.

In an eleventh aspect, a communication apparatus is provided, where the communication apparatus may implement the functions performed by the network device in the tenth aspect or the possible designs of the tenth aspect, and the functions may be implemented by executing corresponding software through hardware. The hardware or software comprises one or more modules corresponding to the functions. If so, the processing module is configured to determine a first blind detection capability of each time window in a first time period according to a part of search space groups in at least two search space groups corresponding to the terminal; the at least two search space groups comprise a first search space group and a second search space group, the first search space group is used for the network equipment to send a Physical Downlink Control Channel (PDCCH) to the terminal in a first time period, and the second search space group is used for the network equipment to send the PDCCH to the terminal in a second time period; the number of time domain symbols contained in the time window is less than that of time domain symbols contained in the time slot; a sending module, configured to send a PDCCH to a terminal in a first time period according to the first blind detection capability; and sending the PDCCH to the terminal in the second time period according to the second blind detection capability of each time slot in the second time period.

With reference to the behavioral function of the network device in the communication method provided by any one of the possible designs of the tenth aspect or the tenth aspect, based on the communication apparatus of the eleventh aspect, when the terminal is configured with at least two search space groups at the same time, the network device may determine the blind detection capability of each time window in at least one time period according to the same or different partial search space groups in the at least two search space groups corresponding to the terminal. The network equipment is prevented from determining the blind detection capability of each time window in each time period according to all the search space groups, so that the determined blind detection capability is too small. The network device may select a portion of the search space groups to determine a blind detection capability for each time window in at least one time segment. In addition, the network device may also determine a blind detection capability for each time slot in the additional portion of the time period based on the time slot. The network equipment determines the blind detection capability corresponding to each time period by combining the time window and the time slot, so that the network equipment can send the PDCCH by using a reasonable aggregation level, the reliability of the PDCCH is improved, meanwhile, the network equipment can send the PDCCH to the terminal in time according to the determined blind detection capability, so that the terminal can detect the PDCCH sent by the network equipment in time, and can schedule the PDSCH or the PUSCH in time according to the PDCCH, and the network transmission delay is shortened.

In one possible design, the processing module is specifically configured to determine a first blind detection capability of each time window in the first time period according to the first search space group.

Based on the possible design, when the network device determines the blind detection capability of each time window in each time period by using a part of search space groups, the network device may determine the blind detection capability of each time window in the time period according to the search space group corresponding to each time period, and may reasonably determine the blind detection capability of each time window in each time period.

In a possible design, the processing module is further configured to start a timer when the sending module sends the PDCCH to the terminal within a second time period according to the second search space group; and the sending module is further used for sending the PDCCH to the terminal within a first time period according to the first search space group after the timer is overtime.

In one possible design, the first blind detection capability of each time window is the maximum number of non-overlapping CCEs per time window and/or the maximum number of candidate PDCCHs for blind detection per time window; the second blind detection capability of each slot is the maximum number of non-overlapping CCEs per slot and/or the maximum number of candidate PDCCHs for blind detection per slot.

In a twelfth aspect, a communication apparatus is provided, which may be a network device or a chip or a system on chip in a network device. The communication means may implement the functions performed by the network device in the aspects and possible designs described above, which functions may be implemented by hardware. In one possible design, the communication device may include: a processor and a transceiver.

The processor may be configured to determine a plurality of search spaces corresponding to at least two search space groups, where the at least two search space groups include a first search space group and a second search space group, the first search space group is used for the terminal to perform PDCCH blind detection in a first time period, and the second search space group is used for the terminal to perform PDCCH blind detection in a second time period; the processor may be further configured to determine a first blind detection capability for each time window in a first time period based on a partial search space group of the at least two search space groups; the number of time domain symbols contained in the time window is less than that of time domain symbols contained in the time slot; the processor may be further configured to perform PDCCH blind detection within a first time period according to the first blind detection capability; and carrying out PDCCH blind detection in the second time period according to the second blind detection capability of each time slot in the second time period. In yet another possible design, the communication device may further include a memory, the memory for storing computer-executable instructions and data necessary for the communication device. When the communication device is running, the processor executes the computer executable instructions stored by the memory to cause the communication device to perform the communication method according to any one of the possible designs of the tenth aspect or the tenth aspect.

The detailed implementation manner of the communication apparatus may refer to the behavioral function of the network device in the communication method provided by any one of the possible designs of the tenth aspect or the tenth aspect.

In a thirteenth aspect, a communication device is provided that includes one or more processors and one or more memories; one or more memories coupled to the one or more processors, the one or more memories for storing computer program code or computer instructions; the computer instructions, when executed by one or more processors, cause a communication apparatus to perform a communication method as set forth in the first aspect or any possible design of the first aspect, or as set forth in the fourth aspect or any possible design of the fourth aspect, or as set forth in the seventh aspect or any possible design of the seventh aspect, or as set forth in the tenth aspect or any possible design of the tenth aspect.

In a fourteenth aspect, a computer-readable storage medium is provided, which stores a computer instruction or a program, which, when run on a computer, causes the computer to perform the communication method according to the first aspect or any possible design of the first aspect, or the communication method according to the fourth aspect or any possible design of the fourth aspect, or the communication method according to the seventh aspect or any possible design of the seventh aspect, or the communication method according to the tenth aspect or any possible design of the tenth aspect.

A fifteenth aspect provides a computer program product comprising instructions which, when run on a computer, cause the computer to perform a communication method as set forth in the first aspect or any possible design of the first aspect, or as set forth in any possible design of the fourth aspect or the seventh aspect, or as set forth in any possible design of the tenth aspect or the tenth aspect.

In a sixteenth aspect, a chip system is provided, the chip system comprising one or more processors and one or more memories; one or more memories coupled to the one or more processors, the one or more memories having stored therein computer program code or computer instructions; the computer program code or computer instructions, when executed by the one or more processors, cause the system-on-chip to perform a communication method as set forth in the first aspect or any possible design of the first aspect, or as set forth in any possible design of the fourth aspect or the fourth aspect, or as set forth in any possible design of the seventh aspect or the tenth aspect, or as set forth in any possible design of the tenth aspect or the tenth aspect.

The technical effects brought by any design manner of the thirteenth aspect to the sixteenth aspect may refer to the technical effects brought by any possible design of the first aspect to the second aspect, or refer to the technical effects brought by any possible design of the fourth aspect to the fifth aspect, or refer to the technical effects brought by any possible design of the seventh aspect to the eighth aspect, or refer to the technical effects brought by any possible design of the tenth aspect to the eleventh aspect, which are not repeated herein.

A seventeenth aspect provides a communication system comprising a communication device according to any of the second to the third aspects and a communication device according to any of the eighth to the ninth aspects, or a communication device according to any of the fifth to the sixth aspects and a communication device according to any of the eleventh to the twelfth aspects.

Drawings

Fig. 1a is a schematic diagram of a PDCCH blind detection timing according to an embodiment of the present disclosure;

FIG. 1b is a schematic diagram of a time window provided in an embodiment of the present application;

fig. 1 is a schematic diagram of a communication system according to an embodiment of the present application;

fig. 2 is a structural diagram of a communication device according to an embodiment of the present disclosure;

fig. 3 is a flowchart of a communication method according to an embodiment of the present application;

FIG. 4a is a schematic diagram of a time window provided in an embodiment of the present application;

FIG. 4b is a schematic diagram of a time window provided in an embodiment of the present application;

fig. 5 is a flowchart of a communication method according to an embodiment of the present application;

fig. 6 is a flowchart of a communication method according to an embodiment of the present application;

fig. 7 is a flowchart of a communication method according to an embodiment of the present application;

fig. 8 is a schematic diagram illustrating a communication device according to an embodiment of the present disclosure;

fig. 9 is a schematic composition diagram of a communication device according to an embodiment of the present application.

Detailed Description

Prior to describing the embodiments of the present application, technical terms related to the embodiments of the present application will be described.

In the communication system, five subcarrier intervals are defined, which are respectively 15KHz, 30KHz, 60KHz, 120KHz and 240KHz, and can also be described as 2^μ15KHz, μ ═ 0, 1, 2, 3, 4. Wherein, different subcarrier spacing sizes may correspond to different slot lengths, for example, when the subcarrier spacing is 15KHz, the slot length is 1 ms; when the subcarrier interval is 30KHz, the time slot length is 0.5 ms; on-load carrierWhen the wave interval is 60KHz, the time slot length is 0.25 ms; when the subcarrier interval is 120KHz, the time slot length is 0.125 ms; when the subcarrier spacing is 240KHz, the slot length is 0.0625 ms.

In a New Radio (NR) communication system, each slot may include 14 time-domain symbols, which may be Orthogonal Frequency Division Multiplexing (OFDM) symbols, in a normal Cyclic Prefix (CP) mode. One subcarrier in the frequency domain and one symbol in the time domain are referred to as one Resource Element (RE). 12 subcarriers in the frequency domain, one time domain symbol in the time domain is called a Resource Element Group (REG), and 6 REGs are called a Control Channel Element (CCE).

Control resource set (CORESET): the method is used for indicating the frequency domain position of a Physical Downlink Control Channel (PDCCH) and the number of time domain symbols occupied by the PDCCH in a time domain; the number of time domain symbols occupied by the PDCCH in the time domain may be 1, 2, or 3. Specifically, the network device may configure different control resource set identifiers for each control resource set in advance, so as to distinguish different control resource sets according to different control resource set identifiers. For example, taking the example that the control resource set includes control resource set1 and control resource set2, the control resource set identification of control resource set1 may be set to p1, and the control resource set identification of control resource set2 may be set to p 2. It should be noted that, in the embodiment of the present application, the PDCCH may also be described as a PDCCH candidate, which is not limited.

Search space set (search space set): each set of search spaces may be associated with a set of control resources. Wherein, the search space set may be a Common Search Space (CSS) set or a user equipment specific search space (USS) set; the CSS is used to transmit cell-level common control information related to a Broadcast Control Channel (BCCH), paging, a random access procedure (RAR), and the like; the USS is used to transmit User Equipment (UE) level control information related to a downlink shared channel (DL-SCH), an uplink shared channel (UL-SCH), and the like. Specifically, different search space set identifiers can be determined for each search space set in advance, so that different search space sets can be distinguished conveniently according to different search space set identifiers. For example, taking the example that the search space set includes search space set1 and search space set2, the search space set identification of search space set1 may be set as s1, and the search space set identification of search space set2 may be set as s 2. It should be noted that, in the embodiment of the present application, the search space set may also be described as a search space, which is not limited.

For example, each search space is used to indicate a time domain location where a PDCCH is located, and the configuration information of each search space may include: a search space identifier, an associated control resource set identifier, a search space type, a search space period, a search space bias, a search space pattern, aggregation levels, and the number of candidate PDCCHs per aggregation level. Wherein the search space identification can be used to identify the current search space. The associated control resource set identification can be used to identify the control resource set associated with the current search space. The search space type may be used to indicate that the current search space is CSS or USS. The search space period may be used to indicate a period length corresponding to the current search space. The search space offset may be used to indicate an offset position of a slot corresponding to the current search space in a slot corresponding to the search space period. The search space mode may be used to indicate a starting time domain symbol in each time slot corresponding to the current search space, where PDCCH blind detection is required. Aggregation Level (AL) may be used to indicate the number of CCEs occupied by a PDCCH; wherein the aggregation level may be 1, 2, 4, 8, or 16. The number of PDCCH candidates per aggregation level may be used to indicate the number of candidate locations for which PDCCHs may be transmitted with the current aggregation level, for example, taking the number of PDCCHs configured with an aggregation level AL of 2 as 4 as an example, it may be determined that a network device may transmit PDCCHs at 4 PDCCH candidate locations, and the aggregation level of the PDCCHs at each candidate location is 2, that is, each PDCCH candidate occupies 2 CCEs.

Specifically, the specific time slot corresponding to the current search space may be determined according to the search space period and the search space offset. Based on the specific time slot corresponding to the current search space, the specific time domain symbol occupied by the PDCCH needing PDCCH blind detection in each time slot corresponding to the current search space, namely the PDCCH blind detection opportunity can be determined according to the search space mode and the control resource set.

For example, referring to fig. 1a, taking the time slots including time slot 0, time slot 1, time slot 2, and time slot 3, each time slot including 14 time domain symbols, and indicating a starting time domain symbol in each time slot that needs to be blind-detected by a PDCCH through a 14-bit field as an example, assuming that a search space period is 2 time slots, a search space offset is 2 nd, a search space mode is 10001000100000, and the number of time domain symbols occupied by the PDCCH in a control resource set associated with the search space in the time domain is 3, it may be determined that the current search space corresponds to time slot 1 and time slot 3 according to the search space period and the search space offset, and it may be determined that blind-detection of the PDCCH needs to be performed on 0-2, 4-6, and 8-10 time domain symbols of time slot 1 and time slot 3 according to the search space mode and the control resource set; or 3 PDCCH blind detection occasions respectively exist in the time slot 1 and the time slot 3, namely the PDCCH blind detection occasion 1 occupying the 0 th-2 time domain symbol, the PDCCH blind detection occasion 2 occupying the 4 th-6 th time domain symbol and the PDCCH blind detection occasion 3 occupying the 8 th-10 th time domain symbol; or as 3 PDCCH candidates in slot 1 and slot 3, respectively, PDCCH candidate 1 occupying the 0-2 time domain symbol, PDCCH candidate 2 occupying the 4-6 time domain symbol, and PDCCH candidate 3 occupying the 8-10 time domain symbol.

And (3) PDCCH blind detection: when performing data transmission with a terminal through a Physical Downlink Shared Channel (PDSCH) or a Physical Uplink Shared Channel (PUSCH), a network device may indicate scheduling information of the PDSCH or the PUSCH by transmitting a PDCCH carrying Downlink Control Information (DCI) to the terminal, where the scheduling information includes: and the time frequency resource, the modulation coding mode and other information are used for enabling the terminal to carry out data transmission with the network equipment through the PDSCH or the PUSCH. The terminal may acquire the PDCCH carrying the DCI and transmitted by the network device by attempting to decode information carried in the PDCCH blind detection occasion that may transmit the PDCCH. Specifically, the terminal may determine a PDCCH blind detection occasion according to the control resource set and the search space, decode information carried in the PDCCH blind detection occasion by using a preconfigured DCI format and Radio Network Temporary Identity (RNTI), determine, if the decoding is successful, the PDCCH carrying the DCI and sent by the network device is received, otherwise continue decoding by using other DCI formats and other RNTIs until the decoding is successful or all PDCCH blind detection occasions are blindly detected, or the blind detection capability of the terminal is achieved.

Blind detection capability: the blind detection capability of the terminal is used for indicating the capability of the terminal to perform PDCCH blind detection in each time unit. Specifically, the blind detection capability of each time unit may include the maximum number of non-overlapping CCEs per time unit and/or the maximum number of candidate PDCCHs for blind detection per time unit; the time unit may refer to a time slot or a time window, and the number of time domain symbols included in the time window is smaller than the number of time domain symbols included in the time slot, for example, 2 time domain symbols or 4 time domain symbols, or 7 time domain symbols; the maximum number of non-overlapping CCEs in a time cell may be the number of the maximum non-overlapping CCEs for channel estimation in the time cell; the number of PDCCH candidates for the maximum blind detection in the time unit may be the number of PDCCH candidates capable of performing the PDCCH blind detection at most in the time unit.

Exemplarily, taking a time unit as a slot as an example, in NR release 15, the maximum number of non-overlapping CCEs of the slot is shown in table 1a, and the maximum number of PDCCH candidates for blind detection of the slot is shown in table 1b, corresponding to different subcarrier intervals; where μ represents the subcarrier spacing 2^μ·15KHz。

TABLE 1a

μ	Maximum number of non-overlapping CCEs in one time slot
		0	56
1	56
		2	48
3	32

TABLE 1b

μ	Number of candidate PDCCHs for maximum blind detection in one time slot
		0	44
1	36
		2	22
3	20

In yet another example, taking time unit as an example of a time window, in NR release 16, the maximum number of non-overlapping CCEs of the time window is shown in table 2a, and the maximum number of PDCCH candidates for blind detection of the time window is shown in table 2b, corresponding to different subcarrier intervals and different terminal capabilities (X, Y).

TABLE 2a

TABLE 2b

For the same terminal capability, the number of candidate PDCCHs for the maximum blind detection of the time window is gradually reduced along with the gradual increase of the subcarrier interval.

Terminal capability: refers to the blind detection capability parameters (X, Y) supported by the terminal. The blind detection capability parameter may include a minimum value X of an interval between starting time domain symbols of every two consecutive time windows supported by the terminal, and a maximum number Y of time domain symbols of each time window supported by the terminal. Illustratively, the terminal capabilities may include one or more of: (2,2), (4,3), (7, 3). The terminal may report one or more of the terminal capabilities to the network device.

Time window (which may be denoted as span): the terminal or the network device may determine at least one time window in each time slot according to the terminal capability and all PDCCH blind detection occasions of the terminal. Specifically, in each time slot, the starting time domain symbol of the first time window is the starting time domain symbol of the foremost PDCCH blind detection occasion, and the time length of the first time window is the maximum value of the minimum value of Y among all terminal capabilities supported by the terminal and the maximum value of the number of time domain symbols in the control resource set. The starting time domain symbol of the next time window is the starting time domain symbol of the foremost PDCCH blind detection occasion not included in the previous time window, and the time length of the next time window is the same as the time length of the first time window. It should be noted that the time length of the last time window does not exceed the last time domain symbol of the time slot, i.e. the time length of the last time window may be smaller than the time length of the time window preceding it.

The blind detection opportunities used in determining the time window are the most blind detection opportunities in one time slot, and it is assumed that the blind detection opportunities determined by the search spaces associated with CORESET0, CORESET1, and CORESET2 may be in different time slots, but when determining the time window, all possible blind detection opportunities in each time slot need to be placed in the same time slot to determine the blind detection capability. Taking the blind detection timing determined by the search space associated with CORESET0 in time slot 1, the blind detection timing determined by the search space associated with CORESET1 in time slot 2, and the blind detection timing determined by the search space associated with CORESET2 in time slot 3 as an example, when determining the time window, all the blind detection timings need to be assumed to be in one time slot, that is, each time slot includes the blind detection timing determined by the search space associated with CORESET0, the blind detection timing determined by the search space associated with CORESET1, and the blind detection timing determined by the search space associated with CORESET 2.

For example, as shown in fig. 1b, taking the terminal capabilities reported by the terminal as (2,2), (4,3), and (7,3), taking all control resource sets configured by the terminal as CORESET0, CORESET1, and CORESET2 as examples, assuming that 3 PDCCH blind detection occasions determined according to CORESET0 and the associated search space are respectively located at the 4 th time domain symbol, the 6 th time domain symbol, and the 11 th time domain symbol, assuming that 2 PDCCH blind detection occasions determined according to CORESET1 and the associated search space are respectively located at the 1 st-2 th time domain symbol, and the 12 th-13 th time domain symbol, taking as an example that 1 PDCCH blind detection occasion determined according to CORESET2 and the associated search space is located at the 4 th-6 th time domain symbol, it can be determined that the starting time domain symbol of the first time window is the 1 st time domain symbol, since the minimum value of Y in the terminal capabilities is 2, the maximum value of the number of time domain symbols in the control resource sets is 3, therefore, it is determined that the time length of the first time window is 3 time domain symbols, the starting time domain symbol of the second time window is the 4 th time domain symbol, the time length is 3 time domain symbols, the starting time domain symbol of the third time window is the 11 th time domain symbol, and the time length is 3 time domain symbols.

Note that, in NR release 16, the magnitude of blind detection capability is the same for each time window in one slot of the same subcarrier interval. And determining the blind detection capability of each time window in each time slot according to the time window of each time slot and the capabilities of all the terminals. Specifically, the terminal or the network device may determine, according to a minimum value of an interval between starting time domain symbols of every two consecutive time windows in each time window corresponding to the current time slot, at least one terminal capability of which X is smaller than or equal to the minimum value among all terminal capabilities, and determine, according to the above tables 2a and 2b, a maximum value of blind detection capabilities corresponding to the at least one terminal capability as the blind detection capabilities of each time window.

For example, taking the terminal capabilities including (2,2), (4,3) and (7,3) as an example, assuming that the minimum value of the interval between the starting time domain symbols of every two consecutive time windows in the current time slot is 5, it may be determined that at least one terminal capability of the terminal capabilities, in which X is less than or equal to the minimum value, includes (2,2) and (4,3), and as can be known from the above tables 2a and 2b, (4,3) the corresponding blind detection capability is greater than (2,2) the corresponding blind detection capability, and then (4,3) the corresponding blind detection capability is determined as the blind detection capability of each time window in each time slot.

In an NR communication system, when a terminal determines a time window corresponding to a time slot, if the search space is more, the PDCCH blind detection opportunities determined according to a control resource set and the search space are more, and in the time window determined according to the PDCCH blind detection opportunities, the interval between the initial time domain symbols of every two time windows is smaller, and the blind detection capability is also smaller. When the terminal only carries out PDCCH blind detection according to part of configured search spaces in all the search spaces in a certain time period, the network equipment cannot send the PDCCH by using a larger aggregation level due to the fact that the blind detection capability corresponding to each time window determined according to all the search spaces is smaller and the number of the largest non-overlapped CCEs is smaller, and the reliability of the PDCCH is reduced; meanwhile, because the blind detection capability of the time window is smaller, the number of PDCCHs that the network equipment can send in one time window is reduced, and the number of candidate PDCCHs for the terminal to carry out PDCCH blind detection in one time window is also reduced, namely, the network equipment cannot send the PDCCHs in time, the terminal cannot detect the PDCCHs in time, so that the PDSCH or the PUSCH cannot be scheduled in time, and the network transmission delay is increased.

To solve the problem, an embodiment of the present application provides a communication method, where when a terminal is configured with at least two search space groups for different time periods at the same time, the terminal may determine a blind detection capability of each time window in each time period according to different or the same partial search space groups in the at least two search space groups. The condition that the determined blind detection capability is too small due to the fact that the terminal determines the blind detection capability of each time window in each time period according to all the search space groups is avoided. The terminal can reasonably select part of the search space groups, determine the blind detection capability of each time window in each time period, enable the corresponding aggregation level of the PDCCH to be larger, improve the reliability of the PDCCH, meanwhile, enable the terminal to timely detect the PDCCH sent by the network equipment, timely schedule the PDSCH or the PUSCH according to the PDCCH, and shorten the network transmission delay.

The following detailed description of embodiments of the present application refers to the accompanying drawings.

The communication method provided in the embodiment of the present application may be applied to any communication system, and the communication system may be a third generation partnership project (3 GPP) communication system, such as an LTE communication system, an LTE V2X communication system, a fifth generation (5G) mobile communication system, an NR V2X communication system, and other next generation communication systems, or a non-3 GPP communication system, without limitation.

Fig. 1 is a schematic diagram of a communication system according to an embodiment of the present application, and as shown in fig. 1, the communication system may include a plurality of terminals and may further include a network device.

In fig. 1, the terminal may be located within a cell coverage area of the network device. The terminal may perform air interface communication with the network device through an Uplink (UL) or a Downlink (DL), and in the UL direction, the terminal may transmit data to the network device through a Physical Uplink Shared Channel (PUSCH); in the DL direction, the network device may transmit a PDCCH carrying DCI to the terminal, or may transmit data to the terminal through the PDSCH.

The terminal (terminal) in fig. 1 may be referred to as a User Equipment (UE), a Mobile Station (MS), a Mobile Terminal (MT), or the like. Specifically, the terminal in fig. 1 may be a mobile phone (mobile phone), a tablet computer, or a computer with a wireless transceiving function. The terminal may also be a Virtual Reality (VR) terminal, an Augmented Reality (AR) terminal, a wireless terminal in industrial control, a wireless terminal in unmanned driving, a wireless terminal in telemedicine, a wireless terminal in smart grid, a wireless terminal in smart city (smart city), a wireless terminal in smart home (smart home), a vehicle-mounted terminal, a vehicle with vehicle-to-vehicle (V2V) capability, a smart internet vehicle, an unmanned aerial vehicle with Unmanned Aerial Vehicle (UAV) to unmanned aerial vehicle communication capability, and the like, without limitation.

The network device in fig. 1 may be any device having a wireless transceiving function, and is mainly used to implement functions such as a wireless physical control function, resource scheduling and wireless resource management, wireless access control, and mobility management. Specifically, the network device may be a device supporting wired access, or may be a device supporting wireless access. Illustratively, the network device may be AN Access Network (AN)/Radio Access Network (RAN) device, and may be composed of a plurality of 5G-AN/5G-RAN nodes. The 5G-AN/5G-RAN node may be: an Access Point (AP), a base station (nodeB, NB), an enhanced base station (eNB), a next generation base station (NR nodeB, gNB), a Transmission Reception Point (TRP), a Transmission Point (TP), or some other access node, etc.

It should be noted that, in the embodiments of the present application, all of the plurality of terminals and network devices may be one or more chips, or may be System On Chip (SOC), etc. Fig. 1 is an exemplary drawing only, and the number of devices included therein is not limited. Furthermore, the communication system may comprise other devices than the device shown in fig. 1. The names of the devices and the names of the links in fig. 1 are not limited, and the devices and the links may be named by other names besides the names shown in fig. 1, such as: the terminal and the network device communicate with each other through a user equipment (Uu) interface, and the UL may also be named Uu link, etc., without limitation.

In a specific implementation, as shown in fig. 1, as follows: each terminal and each network device may adopt the composition structure shown in fig. 2 or include the components shown in fig. 2. Fig. 2 is a schematic diagram illustrating a communication device 200 according to an embodiment of the present disclosure, where the communication device 200 may be a terminal or a chip or a system on a chip in the terminal; but also a network device or a chip or system on a chip in a network device. As shown in fig. 2, the communication device 200 includes a processor 201, a transceiver 202, and a communication line 203.

Further, the communication device 200 can also include a memory 204. The processor 201, the memory 204 and the transceiver 202 may be connected via a communication line 203.

The processor 201 is a Central Processing Unit (CPU), a general purpose processor Network (NP), a Digital Signal Processor (DSP), a microprocessor, a microcontroller, a Programmable Logic Device (PLD), or any combination thereof. The processor 201 may also be other devices with processing functions, such as, without limitation, a circuit, a device, or a software module.

A transceiver 202 for communicating with other devices or other communication networks. The other communication network may be an ethernet, a Radio Access Network (RAN), a Wireless Local Area Network (WLAN), or the like. The transceiver 202 may be a module, a circuit, a transceiver, or any device capable of enabling communication.

A communication line 203 for transmitting information between the respective components included in the communication apparatus 200.

A memory 204 for storing instructions. Wherein the instructions may be a computer program.

The memory 204 may be a read-only memory (ROM) or other types of static storage devices that can store static information and/or instructions, a Random Access Memory (RAM) or other types of dynamic storage devices that can store information and/or instructions, an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compact disc, laser disc, optical disc, digital versatile disc, blu-ray disc, etc.), a magnetic disc storage medium or other magnetic storage devices, and the like, without limitation.

It is noted that the memory 204 may exist separately from the processor 201 or may be integrated with the processor 201. The memory 204 may be used for storing instructions or program code or some data etc. The memory 204 may be located inside the communication device 200 or outside the communication device 200, which is not limited. The processor 201 is configured to execute the instructions stored in the memory 204 to implement the communication method provided by the following embodiments of the present application.

In one example, processor 201 may include one or more CPUs, such as CPU0 and CPU1 in fig. 2.

As an alternative implementation, the communication device 200 includes multiple processors, for example, the processor 207 may be included in addition to the processor 201 in fig. 2.

As an alternative implementation, the communication apparatus 200 further comprises an output device 205 and an input device 206. Illustratively, the input device 206 is a keyboard, mouse, microphone, or joystick, among other devices, and the output device 205 is a display screen, speaker (spaker), among other devices.

It is noted that the communication apparatus 200 may be a desktop computer, a portable computer, a network server, a mobile phone, a tablet computer, a wireless terminal, an embedded device, a chip system or a device with a similar structure as that in fig. 2. Further, the constituent structure shown in fig. 3 does not constitute a limitation of the communication apparatus, and the communication apparatus may include more or less components than those shown in fig. 2, or combine some components, or a different arrangement of components, in addition to the components shown in fig. 2.

In the embodiment of the present application, the chip system may be composed of a chip, and may also include a chip and other discrete devices.

In addition, acts, terms, and the like referred to between the embodiments of the present application may be mutually referenced and are not limited. In the embodiment of the present application, the name of the message exchanged between the devices or the name of the parameter in the message, etc. are only an example, and other names may also be used in the specific implementation, which is not limited.

The communication method provided in the embodiment of the present application is described below with reference to the communication system shown in fig. 1, where a terminal may be any terminal in the communication system, and a network device may be any network device in the communication system, which is communicatively connected to the terminal, and the terminal and the network device described in the following embodiment may have the components shown in fig. 2.

Fig. 3 is a flowchart of a communication method provided in an embodiment of the present application, and as shown in fig. 3, the method may include:

step 301, the network device sends a plurality of search spaces to the terminal, where the plurality of search spaces correspond to at least two search space groups. Correspondingly, the terminal receives the plurality of search spaces and determines at least two search space groups corresponding to the plurality of search spaces.

The plurality of search spaces may be N search spaces, N is an integer greater than or equal to 2, each search space group includes at least one search space, and different search space groups include at least one different search space.

Specifically, the network device may configure a plurality of search spaces for the terminal at a certain time, and correspond the plurality of search spaces to at least two search space groups, and instruct the terminal to perform PDCCH blind detection according to different search space groups in different time periods through one or more of the following one to three ways, so as to avoid that the terminal performs PDCCH blind detection according to all search spaces all the time, thereby reducing power consumption of the terminal. Wherein each time segment may comprise at least one time slot, or at least one time window, or one or more time domain symbols.

For example, when the network device configures a plurality of search spaces for the terminal at a certain time, the network device may configure the plurality of search spaces for the terminal by transmitting, to the terminal, indication information indicating the plurality of search spaces. The indication information may be carried in a high layer signaling, where the high layer signaling may refer to a signaling sent by a high layer protocol layer, and the high layer protocol layer is at least one protocol layer above a physical layer, such as: a Medium Access Control (MAC) layer, a Radio Link Control (RLC) layer, a Packet Data Convergence Protocol (PDCP) layer, a Radio Resource Control (RRC) layer, a non-access stratum (NAS) layer, and the like, without limitation.

It should be noted that, the network device configures a plurality of search spaces corresponding to at least two search space groups for the terminal at a certain time, which may also be described as the terminal supporting the at least two search space groups simultaneously.

For example, the network device may indicate the corresponding search space group for each search space by any one or more of the following examples one or two:

for example, the network device may configure a search space group identifier (SS group) for each search space, where the search space group identifier is one of at least two search space group identifiers, and each search space is divided into different search space groups according to different search space group identifiers. When the network device sends a plurality of search spaces configured for the terminal to the terminal, each search space in the plurality of search spaces may carry a search space group identifier corresponding to the search space.

For example, taking the network device as an example that the plurality of search spaces configured by the terminal include s1, s2 and s3, the network device may divide the plurality of search spaces into two groups, one group is an SS group1 including s1 and s2, and the other group is an SS group2 including s3, by configuring SS groups 1 for s1 and s2 and SS group2 for s 3. When the network device sends s1, s2 and s3 to the terminal, s1 may carry SS group1, s2 may carry SS group1, and s3 may carry SS group 2. So that the terminal determines s1 and s2 as one search space group according to the SS group1 and determines s3 as another search space group according to the SS group 2.

In example two, when the network device sends the search space to the terminal, the network device may carry indication information including a correspondence between each search space group identifier of the at least two search space group identifiers and the search space identifier.

For example, the multiple search spaces configured by taking the network device as the terminal include s1, s2, s3, s1 and s2 correspond to SS group1, and s3 corresponds to SS group2, for example, when the network device sends s1, s2 and s3 to the terminal, the network device may also send indication information that SS group1 corresponds to s1 and s2, and that SS group2 corresponds to s3 to the terminal.

For example, the network device may instruct the terminal to perform PDCCH blind detection according to different search space groups in different time periods in any one or more of the following one or two or three ways:

the first method is as follows: when the network device sends the plurality of search spaces to the terminal, the network device may also send a time period corresponding to each search space group to the terminal. And the time period corresponding to each search space group is used for indicating the terminal to carry out PDCCH blind detection in the time period according to the search space group corresponding to the time period.

For example, taking the example that the at least two search space groups include a first search space group and a second search space group, the network device may send, to the terminal, indication information indicating that the first search space group corresponds to the first time period and the second search space group corresponds to the second time period.

The second method comprises the following steps: when the terminal receives DCI which is sent by the network equipment and used for indicating the terminal to switch to other search space groups in the current time period, the terminal switches the current search space group to the search space group indicated by the DCI.

Optionally, the DCI includes second indication information, where the second indication information includes a search space group identifier, and the search space group identifier is used to instruct the terminal to switch to a search space group corresponding to the search space group identifier.

Specifically, after the terminal receives the DCI, if the search space group corresponding to the current time slot does not match the search space group indicated by the DCI, starting from the last symbol of the time domain symbol corresponding to the DCI and the first time slot counted by P symbols, stopping PDCCH blind detection according to the search space group corresponding to the current time slot, and starting PDCCH blind detection according to the search space group indicated by the DCI. And if so, continuing to use the search space group corresponding to the current time period to carry out PDCCH blind detection. P may be configured in advance for the terminal for the network device, or may be specified in advance by the communication protocol, without limitation.

For example, taking the search space group corresponding to the current time period as the first search space group and the search space group indicated by the DCI received in the first time period as the second search space group, the terminal may determine, according to the DCI, that the search space group corresponding to the current time period is not matched with the search space group indicated by the DCI, stop performing PDCCH blind detection according to the first search space group and start performing PDCCH blind detection according to the second search space group starting from the last symbol of the time domain symbol corresponding to the DCI and the first time slot after several P symbols.

Further, the terminal may further receive indication information sent by the network device and used for indicating a specific location of the search space group identifier in the DCI, and the terminal determines the search space group identifier from the received DCI according to the location indicated by the indication information.

It should be noted that, when the terminal supports two search space groups at the same time, the terminal may also switch the search space group corresponding to the current time period to another search space group after receiving the DCI, without determining whether the search space groups are matched.

Optionally, the DCI includes third indication information; and the third indication information comprises channel occupation time, and the terminal is switched to the search space group indicated by the DCI after the channel occupation time is overtime.

Specifically, after receiving the DCI, the terminal may stop performing PDCCH blind detection according to the search space group corresponding to the current time slot from the first time slot after the last time domain symbol number P symbols of the channel occupation time indicated by the DCI, and start performing PDCCH blind detection according to the search space group indicated by the DCI.

The third method comprises the following steps: when the terminal starts to perform PDCCH blind detection according to a certain search space group, the terminal may start a timer, and switch to another search space group after the timer expires.

Specifically, the terminal receives a timer sent by the network device, starts the corresponding timer when performing the PDCCH blind detection according to the search space group, and stops performing the PDCCH blind detection according to the current search space group and starts performing the PDCCH blind detection according to other search space groups from the time slot corresponding to the timeout of the timer after counting the first time slot of P symbols.

Optionally, the terminal switches to another search space group after the timer times out according to a preset search space group sequence.

It can be understood that, when the terminal supports two search space groups simultaneously, the terminal may switch to another search space group to start PDCCH blind detection after the timer corresponding to the current search space group expires, instead of performing search space group switching according to the preset search space group sequence.

Optionally, the network device further sends related information of the control resource set to the terminal; the description of the control resource set may refer to the description of the control resource set, which is not repeated herein.

Step 302, the terminal determines a first blind detection capability of each time window in a first time period according to a part of the at least two search space groups.

Optionally, step 302 further includes determining, by the terminal, a second blind detection capability of each time window in the second time period according to a partial search space group of the at least two search spaces.

Specifically, when the terminal receives a plurality of search spaces indicated by the network device, at least two search space groups corresponding to the plurality of search spaces may be determined, and the blind detection capability of each time window in each time period may be determined according to the same or different partial search space groups in the at least two search space groups. Or, it may also be described that when the terminal determines the blind detection capability of each time window in a certain time period according to a partial search space group of the at least two search space groups, at least one search space group of the at least two search space groups is not used to determine the blind detection capability of each time window in the time period; and when the terminal determines the blind detection capability for different time periods, part of the at least two search space groups may be the same or different.

In one possible design, when the terminal determines the blind detection capability for each time window in different time periods by using different partial search space groups, the terminal may determine the blind detection capability for each time window in the current time period according to the search space group corresponding to the current time period.

For example, taking that the at least two search space groups include a first search space group and a second search space group, and the first search space group corresponds to the first time period, and the second search space group corresponds to the second time period as an example, the terminal may determine, according to the first search space group, a first blind detection capability of each time window in the first time period, and determine, according to the second search space group, a second blind detection capability of each time window in the second time period.

Specifically, the terminal may determine a specific time domain symbol position of the PDCCH blind detection occasion in the first time period according to the search space mode of each search space in the first search space group and the control resource set associated with the search space, further determine all possible PDCCH blind detection occasions in each time slot in the first time period, determine a time window corresponding to each time slot according to all possible PDCCH blind detection occasions in each time slot, and determine the first blind detection capability of each time window in each time slot according to the time window corresponding to each time slot and the terminal capability. The process of determining the first blind detection capability may refer to the foregoing description of the time window, which is not repeated herein.

It should be noted that the manner in which the terminal determines the second blind detection capability of each time window in the second time period according to the second search space may refer to the manner in which the terminal determines the first blind detection capability of each time window in the first time period according to the first search space, which is not described in detail herein.

For example, referring to fig. 4a, a terminal occupies 0-1 st time domain symbol of a first time slot, 4-5 th time domain symbol of a second time slot, and 9-10 th time domain symbol of a third time slot in a first time period according to a PDCCH blind detection opportunity determined by a first search space group, and terminal capabilities determined by the terminal include (2,2), (4,3), and (7, 3). The terminal can determine the possible PDCCH blind detection occasions in each time slot in the first time period according to the PDCCH blind detection occasions corresponding to the first search space group, wherein the PDCCH blind detection occasions comprise a PDCCH blind detection occasion 1 occupying a 0-1 time domain symbol, a PDCCH blind detection occasion 2 occupying a 4-5 time domain symbol and a PDCCH blind detection occasion 3 occupying a 9-10 time domain symbol, determining that each time slot in the first time period comprises three time windows according to three PDCCH blind detection opportunities corresponding to each time slot in the first time period, wherein the three time windows are respectively a time window 1 with an initial time domain symbol of 0 th time domain symbol and a time length of 2 time domain symbols, a time window 2 with an initial time domain symbol of 4 th time domain symbol and a time length of 2 time domain symbols, and a time window 3 with a starting time domain symbol being the 9 th time domain symbol and a time length being 2 time domain symbols. The terminal may determine, according to 3 time windows of each time slot in the first time period, that a minimum value of an interval between starting time domain symbols of every two consecutive time windows in each time slot is 4, determine, according to terminal capabilities, terminal capabilities of which X is less than or equal to the minimum value, including (2,2) and (4,3), and may determine, according to the above table 2a and table 2b, that a first blind detection capability of each time window in the first time period is a blind detection capability corresponding to (4, 3).

Similarly, taking the PDCCH blind detection occasion determined by the terminal according to the second search space group to occupy the 0 th-1 time domain symbol of the first time slot and the 7 th-8 time domain symbol of the second time slot, and the terminal capability determined by the terminal includes (2,2), (4,3) and (7,3), for example, the terminal determines the PDCCH blind detection occasion possible in each time slot in the second time slot according to the PDCCH blind detection occasion corresponding to the second search space group, which includes the PDCCH blind detection occasion 1 occupying the 0 th-1 time domain symbol and the PDCCH blind detection occasion 2 occupying the 7 th-8 time domain symbol, determines that each time slot in the second time slot includes two time windows according to the two PDCCH blind detection occasions corresponding to each time slot in the second time slot, which are respectively the time window 1 with the initial time domain symbol being the 0 th time domain symbol and the time length being the 2 time domain symbols, the starting time domain symbol is the 7 th time domain symbol, and the time window 2 has a time length of 2 time domain symbols. The terminal may determine, according to 2 time windows of each time slot in the second time period, that a minimum value of an interval between starting time domain symbols of every two consecutive time windows in each time slot is 7, and may determine, according to the terminal capability and the above table 2a and table 2b, that the second blind detection capability of each time window in the second time period is a blind detection capability corresponding to (7, 3).

Compared with the terminal shown in fig. 4a that determines the blind detection capability of each time window in each time period according to the search space group corresponding to each time period, referring to fig. 4b, when the terminal determines the blind detection capability of each time window in each time period according to all search space groups, the terminal occupies the 0 th to 1 st time domain symbol, the 4 th to 5 th time domain symbols, the 7 th to 8 th time domain symbols and the 9 th to 10 th time domain symbols of each time slot according to the PDCCH blind detection opportunities determined by the first search space group and the second search space group, determines that each time slot includes 4 time windows according to the PDCCH blind detection opportunities, and respectively includes a time window 1 in which the initial time domain symbol is the 0 th time domain symbol and the time length is 2 time domain symbols, a time window 2 in which the initial time domain symbol is the 4 th time domain symbol and the time length is 2 time domain symbols, and the initial time domain symbol is the 7 th time domain symbol, A time window 3 with a time length of 2 time domain symbols, and a time window 4 with a starting time domain symbol of 9 th time domain symbol and a time length of 2 time domain symbols, may determine that the minimum value of the interval between the starting time domain symbols of every two consecutive time windows in each time slot is 2, and may determine that the blind detection capability of each time window in each time period is the blind detection capability corresponding to (2,2) according to the terminal capability and the above table 2a and table 2 b.

As can be seen from tables 2a and 2b, the blind detection capability corresponding to (2,2) is smaller than the blind detection capability corresponding to (4,3) and also smaller than the blind detection capability corresponding to (7,3), so that, compared with the case where the terminal determines the blind detection capability of each time window in each time period according to all the search space groups, the terminal determines that the blind detection capability of each time window in each time period is larger according to the search space groups corresponding to each time period, so that the aggregation level corresponding to the PDCCH is larger, the reliability of the PDCCH is improved, and meanwhile, the terminal can also detect the PDCCH sent by the network device in time, schedule the PDSCH or the PUSCH in time according to the PDCCH, and shorten the network transmission delay.

In yet another possible design, the terminal may determine the blind detection capability for each time window in different time periods using the same set of partial search spaces. That is, the terminal determines the blind detection capability of each time window in each time period by using the same search space group in at least two search space groups.

For example, taking that the at least two search space groups include a first search space group and a second search space group, and the first search space group corresponds to the first time period, and the second search space group corresponds to the second time period as an example, the terminal may determine, according to the first search space group, a first blind detection capability of each time window in the first time period, and determine the first blind detection capability as a second blind detection capability of each time window in the second time period.

Specifically, the terminal determines the first blind detection capability of each time window in the first time period according to the first search space group, which is not described in detail with reference to the foregoing description.

When the terminal determines the second blind detection capability of each time window in the second time period, the terminal may determine a specific time domain symbol position of the PDCCH blind detection occasion in the second time period according to the search space mode of each search space in the second search space group and the control resource set associated with the search space, further determine all possible PDCCH blind detection occasions in each time slot in the second time period, determine the time window corresponding to each time slot according to all possible PDCCH blind detection occasions in each time slot, and determine the first blind detection capability as the second blind detection capability of each time window in the second time period, so as to reduce the calculation amount of the terminal, reduce the complexity of the terminal in determining the blind detection capability, and thus reduce the power consumption of the terminal. The specific process of determining the time window of each time slot in the second time period may refer to the foregoing description for determining the time window of each time slot in the first time period, and is not repeated herein.

Referring to fig. 4a, taking the PDCCH blind detection occasion determined by the terminal according to the second search space group to occupy the 0 th-1 time domain symbol of the first time slot and the 7 th-8 time domain symbol of the second time slot, and the terminal capability determined by the terminal includes (2,2), (4,3) and (7,3) as an example, the terminal determines the PDCCH blind detection occasion possible for each time slot in the second time slot according to the PDCCH blind detection occasion corresponding to the second search space group to include PDCCH blind detection occasion 1 occupying the 0 th-1 time domain symbol and PDCCH blind detection occasion 2 occupying the 7 th-8 time domain symbol, determines that each time slot in the second time slot includes two time windows according to the two PDCCH blind detection occasions corresponding to each time slot in the second time slot, and respectively determines that the initial time domain symbol is the 0 th time domain symbol and the time window 1 with the time length of 2 time domain symbols, the starting time domain symbol is the 7 th time domain symbol, and the time window 2 has a time length of 2 time domain symbols. It may be determined that the second blind detection capability of each time window in the second time period is equal to the first blind detection capability of each time window in the first time period, that is, the second blind detection capability of each time window in the second time period is the corresponding blind detection capability of (4, 3).

Further, in this possible design, there are more PDCCH blind detection occasions in the first search space group than in the second search space group. The blind detection capability of each time window in the time period corresponding to the search space group and the blind detection capability of each time window in the time period corresponding to the other search space group can be determined based on the search space group with more PDCCH blind detection occasions in the two search space groups.

Specifically, the more PDCCH blind detection occasions in each time slot, the smaller the interval between the initial time domain symbols of every two time windows in the time window determined according to the PDCCH blind detection occasions, and the smaller the blind detection capability. On the basis that the terminal determines the blind detection capability of each time window in each time period according to the partial search space group, the blind detection capability of each time window in each time period is determined according to the partial search space group with more PDCCH blind detection opportunities, so that the blind detection capability of each time window in each time period can be properly reduced, and the power consumption of the terminal is avoided to be larger.

Alternatively, the first search space group corresponds to a search space group identification that is smaller than the second search space group. The blind detection capability of each time window in the time period corresponding to the search space group and the blind detection capability of each time window in the time period corresponding to the other search space group can be determined based on the search space group with the smaller search space group identifier corresponding to the two search space groups.

Specifically, the terminal may determine the blind detection capability of each time window in each time period according to a partial search space group of the at least two search space groups. For example, the terminal may determine the blind detection capability according to the search space group with the smaller search space group identifier, or may determine the blind detection capability according to the search space group with the larger search space group identifier, without limitation. Compared with the method that the terminal determines the blind detection capability of each time window in each time period according to all the search space groups, the terminal determines the blind detection capability of each time window in each time period according to part of the search space groups, the blind detection capability of each time window can be improved, the aggregation level corresponding to the PDCCH is larger, the reliability of the PDCCH is improved, meanwhile, the terminal can also detect the PDCCH sent by the network equipment in time, the PDSCH or the PUSCH is scheduled in time according to the PDCCH, and the network transmission delay is shortened.

Alternatively, the first search space group is a search space group indicated by the first indication information. The blind detection capability of each time window in the time period corresponding to the search space group and the blind detection capability of each time window in the time period corresponding to another search space group can be determined based on the search space group indicated by the first indication information.

Specifically, the terminal may receive first indication information sent by the network device, and determine the blind detection capability of each time window in each time period according to the search space group indicated by the first indication information. It can be understood that, when the first indication information indicates the second search space group, the terminal determines the blind detection capability of each time window in each time period according to the second search space group.

It should be noted that, in the two possible designs, when the terminal determines the first blind detection capability of each time window in the first time period and the second blind detection capability of each time window in the second time period, the terminal may determine the first blind detection capability and the second blind detection capability at the same time, may also determine the first blind detection capability in the first time period, and determine the second blind detection capability in the second time period, without limitation.

And step 303, the terminal performs PDCCH blind detection within a first time period according to the first blind detection capability.

Optionally, step 303 further includes that the terminal performs PDCCH blind detection in a second time period according to the second blind detection capability.

Specifically, the terminal may determine a time window in each time period according to the search space group corresponding to each time period, determine the blind detection capability corresponding to the time window according to the step 302 based on the time window, and perform PDCCH blind detection in the time window according to the blind detection capability corresponding to the time window.

Exemplarily, taking an example that the at least two search space groups include a first search space group and a second search space group, the terminal determines the first blind detection capability of each time window in the first time period according to the step 302, and performs PDCCH blind detection in each time window of the first time period based on the first blind detection capability. Determining the second blind detection capability of each time window in the second time period according to the step 302, and performing PDCCH blind detection in each time window in the second time period based on the second blind detection capability.

Based on the method shown in fig. 3, when the terminal is configured with at least two search space groups at the same time, the terminal may determine the blind detection capability of each time window in each time period according to different or the same partial search space groups in the at least two search space groups. The condition that the determined blind detection capability is too small due to the fact that the terminal determines the blind detection capability of each time window in each time period according to all the search space groups is avoided. The terminal can reasonably select part of the search space groups, determine the blind detection capability of each time window in each time period, enable the corresponding aggregation level of the PDCCH to be larger, improve the reliability of the PDCCH, meanwhile, enable the terminal to timely detect the PDCCH sent by the network equipment, timely schedule the PDSCH or the PUSCH according to the PDCCH, and shorten the network transmission delay.

Referring to fig. 5, the network device may also determine the blind detection capability of each time window in each time period according to the same or different partial search space groups in at least two search space groups, and according to the blind detection capability corresponding to the time window, send a PDCCH to the terminal in each time period in each time window, so that the network device sends the PDCCH to the terminal based on the same blind detection capability as the terminal, so that the network device may send the PDCCH with a reasonable aggregation level, improve the reliability of the PDCCH, and simultaneously, the network device may send the PDCCH to the terminal in time according to the determined blind detection capability, so that the terminal may detect the PDCCH sent by the network device in time, and schedule the PDSCH or the PUSCH in time according to the PDCCH, and the network transmission delay is shortened.

Fig. 5 is a flowchart of a communication method provided in an embodiment of the present application, and as shown in fig. 5, the method may include:

step 501, the network device determines a plurality of search spaces corresponding to at least two search space groups that are simultaneously supported by the terminal.

Specifically, the description of step 501 may refer to the detailed description of step 301, and is not repeated.

Step 502, the network device determines a first blind detection capability of each time window in a first time period according to a part of the at least two search space groups.

Optionally, step 502 further includes determining, by the network device, a second blind detection capability of each time window in the second time period according to a partial search space group of the at least two search spaces.

Specifically, the process of determining the blind detection capability of each time window by the network device in step 502 may refer to the process of determining the blind detection capability of each time window by the terminal in step 302, which is not described in detail.

Optionally, the network device receives at least one terminal capability sent by the terminal.

Step 503, the network device sends the PDCCH to the terminal in the first time period according to the first blind detection capability.

Optionally, step 503 further includes that the network device sends the PDCCH to the terminal within a second time period according to the second blind detection capability.

Specifically, the network device may determine a time window in each time period according to the search space group corresponding to each time period, determine the blind detection capability corresponding to the time window according to the step 502 based on the time window, and perform PDCCH on the terminal in the time window according to the blind detection capability corresponding to the time window.

Optionally, when the network device sends the PDCCH to the terminal, different time periods correspond to different search space groups, and the manner in which the network device switches the search space groups at different time periods may refer to the manner in which the terminal switches the search space groups at different time periods in any one of the first to third manners in step 301, which is not described in detail.

Referring to fig. 6, the terminal may also determine the blind detection capability of each time window in a partial time period according to the same or different partial search space groups in at least two search space groups, and send a PDCCH to the terminal in each time window in the partial time period according to the blind detection capability corresponding to the time window. And determining the blind detection capability of each time slot in the other part of the time slot based on the time slot in the other part of the time slot, and sending the PDCCH to the terminal in each time slot in the other part of the time slot according to the blind detection capability corresponding to the time slot. When the terminal determines the blind detection capability corresponding to each time period, the time window and the time slot are used in a combined manner, so that the terminal can reasonably determine the blind detection capability corresponding to each time period, reasonably determine the aggregation level corresponding to the PDCCH, improve the reliability of the PDCCH, meanwhile, the terminal can also timely detect the PDCCH sent by the network equipment, timely schedule the PDSCH or the PUSCH according to the PDCCH, and shorten the network transmission delay.

Fig. 6 is a flowchart of a communication method provided in an embodiment of the present application, and as shown in fig. 6, the method may include:

step 601, the network device sends a plurality of search spaces to the terminal, and the plurality of search spaces correspond to at least two search space groups. Accordingly, the terminal receives a plurality of search spaces and determines at least two search space groups according to the plurality of search spaces.

Specifically, the detailed description of step 601 may refer to step 301, which is not repeated.

Step 602, the terminal determines a first blind detection capability of each time window in a first time period according to a part of the at least two search space groups.

Step 603, the terminal determines a second blind detection capability of each time slot in the second time period.

Specifically, the terminal may determine the blind detection capability of each time window in the partial time period according to the same or different partial search space groups of the at least two search space groups. At the same time, the blind detection capability of each time slot in the other part of the time period is determined.

For example, taking the at least two search space groups as the first search space group and the second search space group as an example, the terminal may determine the first blind detection capability of each time window in the first time period according to the first search space group by referring to the method shown in step 302. Meanwhile, the terminal may also refer to table 1a and table 1b, and determine the blind detection capability of each time slot in the second time period according to the subcarrier interval corresponding to the time slot in the second time period.

Further, in this possible design, there are more PDCCH blind detection occasions in the first search space group than in the second search space group. The blind detection capability of each time window can be determined by using a time window-based method for the search space group with more PDCCH blind detection opportunities in the two search space groups, and the blind detection capability of each time slot is determined by using a time slot-based method for the search space group with less PDCCH blind detection opportunities.

Specifically, the more PDCCH blind detection occasions in each time slot, the smaller the interval between the initial time domain symbols of every two time windows in the time window determined according to the PDCCH blind detection occasions, and the smaller the blind detection capability. The terminal determines the blind detection capability by adopting a time window-based mode in a time period with more PDCCH blind detection opportunities, so that the blind detection capability of each time window in each time period can be properly reduced, and the power consumption of the terminal is avoided to be larger. Meanwhile, although the blind detection capability of each time window is reduced, because the time windows are more, compared with the blind detection capability determined according to the time slots, the total blind detection capability of the time slots comprising a plurality of time windows is still greater than the blind detection capability determined according to the time slots, and the waste of the blind detection capability can be avoided.

Alternatively, the first search space group corresponds to a search space group identification that is smaller than the second search space group.

Specifically, the terminal may also determine, according to a search space group with a smaller search space group identifier in the at least two search space groups, that the blind detection capability of the time window is determined in a time period corresponding to the search space group in a time window-based manner, and determine, in a time period corresponding to a search space group with a larger search space group identifier, the blind detection capability of the time slot in a time slot-based manner.

Alternatively, the first search space group is a search space group indicated by the first indication information.

Specifically, the terminal receives first indication information sent by the network device, determines, according to a search space group indicated by the first indication information, a blind detection capability of a time window in a time period corresponding to the search space group indicated by the first indication information in a time-based manner, and determines, in a time period corresponding to another search space group, a blind detection capability of a time slot in a time-based manner, without limitation.

For example, referring to fig. 4a, taking an example that the terminal determines, according to the first search space group, possible PDCCH blind detection occasions in each time slot in the first time period include PDCCH blind detection occasion 1 occupying 0-1 time domain symbols, PDCCH blind detection occasion 2 occupying 4-5 time domain symbols, and PDCCH blind detection occasion 3 occupying 9-10 time domain symbols, and the terminal capability determined by the terminal includes (2,2), (4,3), and (7, 3). The terminal may determine, according to a possible PDCCH blind detection occasion in each time slot in the first time period, that each time slot in the first time period includes three time windows, which are respectively a time window 1 in which the starting time domain symbol is a 0 th time domain symbol and the time length is 2 time domain symbols, a time window 2 in which the starting time domain symbol is a 4 th time domain symbol and the time length is 2 time domain symbols, and a time window 3 in which the starting time domain symbol is a 9 th time domain symbol and the time length is 2 time domain symbols. The terminal may determine, according to 3 time windows of each time slot in the first time period, that a minimum value of an interval between starting time domain symbols of every two consecutive time windows in each time slot is 4, determine, according to terminal capabilities, terminal capabilities of which X is less than or equal to the minimum value, including (2,2) and (4,3), and may determine, according to the above table 2a and table 2b, that a first blind detection capability of each time window in the first time period is a blind detection capability corresponding to (4, 3). In addition, the terminal may also determine the blind detection capability of each time slot in the second time period according to the subcarrier interval corresponding to each time slot in the second time period and according to tables 1a and 1b above.

And step 604, the terminal performs PDCCH blind detection within a first time period according to the first blind detection capability.

Optionally, step 604 further includes the terminal performing blind PDCCH detection in the second time period according to the second blind detection capability of each time slot in the second time period.

Specifically, the detailed description of step 604 may refer to step 303, which is not repeated herein.

Referring to fig. 7, the network device may also determine the blind detection capability in a time slot based manner in a time slot corresponding to a part of the search space group in fig. 6, and determine the blind detection capability in a time slot based manner in a time slot corresponding to another part of the search space group, so that the network device transmits the PDCCH to the terminal based on the same blind detection capability as the terminal, so that the network device transmits the PDCCH at a reasonable aggregation level, and improves the reliability of the PDCCH, and meanwhile, the network device may transmit the PDCCH to the terminal in time according to the determined blind detection capability, so that the terminal may detect the PDCCH transmitted by the network device in time, and schedule the PDSCH or the PUSCH in time according to the PDCCH, and the network transmission delay is shortened.

Step 701, the network device determines a plurality of search spaces corresponding to at least two search space groups that are simultaneously supported by the terminal.

Specifically, the description of step 701 may refer to the detailed description of step 301, and is not repeated.

Step 702, the network device determines a first blind detection capability of each time window in a first time period according to a part of the at least two search space groups.

Step 703, the network device determines a second blind detection capability of each timeslot in the second time period.

Specifically, the detailed description of step 702 and step 703 may refer to step 602 and step 603, and is not repeated.

Step 704, the network device sends the PDCCH to the terminal in the first time period according to the first blind detection capability.

Optionally, step 704 further includes that the network device sends the PDCCH to the terminal within a second time period according to the second blind detection capability.

Specifically, the network device may send the PDCCH to the terminal according to the blind detection capability determined in step 702 and step 703.

The scheme provided by the embodiment of the application is introduced mainly from the point of interaction between devices. It will be appreciated that each device, in order to carry out the above-described functions, comprises corresponding hardware structures and/or software modules for performing each function. Those of skill in the art will readily appreciate that the present application is capable of hardware or a combination of hardware and computer software implementing the various illustrative algorithm steps described in connection with the embodiments disclosed herein. Whether a function is performed as hardware or computer software drives hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

In the embodiment of the present application, functional modules may be divided for each network element according to the above method example, for example, each functional module may be divided corresponding to each function, or two or more functions may be integrated in one processing module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. It should be noted that, in the embodiment of the present application, the division of the module is schematic, and is only one logic function division, and there may be another division manner in actual implementation.

In the case of dividing each functional module with corresponding functions, fig. 8 shows a communication apparatus, and the communication apparatus 80 may be a terminal or a chip in a terminal or a system on a chip. The communication device 80 may be used to perform the functions of the terminal referred to in the above embodiments. The communication device 80 shown in fig. 8 includes: a processing module 801, a receiving module 802, and a sending module 803.

A processing module 801 for determining a plurality of search spaces corresponding to at least two search space groups; the at least two search space groups include a first search space group for the processing module 801 to perform PDCCH blind detection in a first time period and a second search space group for the processing module 801 to perform PDCCH blind detection in a second time period; the processing module 801 is further configured to determine, according to a partial search space group of the at least two search space groups, a first blind detection capability of each time window in a first time period; determining a second blind detection capability of each time window in a second time period according to a part of the at least two search space groups; the number of time domain symbols contained in the time window is smaller than that of time domain symbols contained in the time slot. The processing module 801 is further configured to perform PDCCH blind detection in a first time period according to the first blind detection capability, and perform PDCCH blind detection in a second time period according to the second blind detection capability.

The specific implementation manner of the communication device 80 may refer to the behavior function of the terminal in the communication method described in fig. 3 to 5.

In one possible design, the processing module 801 is specifically configured to determine, according to the first search space group, a first blind detection capability of each time window in the first time period; and determining a second blind detection capability of each time window in a second time period according to the second search space group.

In one possible design, the processing module 801 is specifically configured to determine, according to the first search space group, a first blind detection capability of each time window in the first time period; and determining the first blind detection capability as a second blind detection capability for each time window in a second time period.

In one possible design, the PDCCH blind detection occasions in the first search space group are more than those in the second search space group; or the search space group identification corresponding to the first search space group is smaller than the second search space group; or the first search space group is the search space group indicated by the first indication information; the communication apparatus further includes a receiving module 802, where the receiving module 802 is configured to receive the first indication information from the network device.

In a possible design, the processing module 801 is further configured to determine, according to the first search space group, the control resource set corresponding to the first search space group, and the at least one terminal capability, at least one time window corresponding to each timeslot in the first time period; each of the at least one terminal capability is used to indicate a blind detection capability parameter supported by the terminal; the blind detection capability parameter comprises a minimum value X of an interval between starting time domain symbols of every two continuous time windows supported by the terminal and a maximum time domain symbol number Y of every time window supported by the terminal; the processing module 801 is further configured to determine, according to at least one terminal capability and at least one time window corresponding to each time slot, a first blind detection capability of the at least one time window corresponding to each time slot in the first time period.

In one possible design, the communication apparatus further includes a sending module 803, and the sending module 803 is configured to send at least one terminal capability to the network device.

In one possible design, the processing module 801 is configured to perform PDCCH blind detection in a first time period according to a first search space group; if the receiving module 802 receives DCI instructing the terminal to switch to the second search space group in the first time period, the processing module 801 is configured to perform PDCCH blind detection according to the second search space group in the second time period.

In one possible design, the DCI includes second indication information; the second indication information comprises a search space group identification corresponding to the second search space group; or, the DCI includes third indication information; the third indication information includes a channel occupation time, and the processing module 801 is configured to switch to the second search space group after the channel occupation time is over.

In one possible design, the processing module 801 is configured to perform PDCCH blind detection in a second time period according to the second search space group, and start a timer; the processing module 801 is further configured to perform PDCCH blind detection within a first time period according to the first search space group after the timer expires.

Alternatively, in addition to the behavior function of the terminal in the communication method described with reference to fig. 3 to 5, the specific implementation of the communication apparatus 80 may also refer to the behavior function of the terminal in the communication method shown in fig. 6 to 7.

The processing module 801 is configured to determine multiple search spaces corresponding to at least two search space groups, where the at least two search space groups include a first search space group and a second search space group, the first search space group is used for the terminal to perform PDCCH blind detection in a first time period, and the second search space group is used for the terminal to perform PDCCH blind detection in a second time period; the processing module is further configured to determine a first blind detection capability of each time window in a first time period according to a partial search space group of the at least two search space groups; the number of time domain symbols contained in the time window is less than that of time domain symbols contained in the time slot; the processing module 801 is further configured to perform PDCCH blind detection within a first time period according to the first blind detection capability; and carrying out PDCCH blind detection in the second time period according to the second blind detection capability of each time slot in the second time period.

In one possible design, the processing module 801 is specifically configured to determine a blind detection capability of each time window in the first time period according to the first search space group.

In one possible design, the processing module 801 is configured to perform PDCCH blind detection in a first time period according to a first search space group; if the receiving module 802 receives DCI in the first time period and the DCI instructs the terminal to switch to the second search space group; a processing module 801 is configured to perform PDCCH blind detection according to the second search space group in a second time period.

In one possible design, the DCI includes second indication information; the second indication information comprises a search space group identification corresponding to the second search space group; or, the DCI includes third indication information; the third indication information includes the channel occupation time, and the processing module 801 is further configured to switch to the second search space group after the channel occupation time is over.

As yet another implementation manner, the processing module 801 in fig. 8 may be replaced by a processor, the processor may integrate the functions of the processing module 801, and the receiving module 802 and the sending module 803 may be replaced by a transceiver, the transceiver may integrate the functions of the receiving module 802 and the sending module 803. Further, the communication device 80 shown in fig. 8 may further include a memory. When the processing module 801 is replaced by a processor and the receiving module 802 and the transmitting module 803 are replaced by a transceiver, the communication device 80 according to the embodiment of the present application may be the communication device shown in fig. 2.

In the case of dividing each functional module by corresponding functions, fig. 9 shows a communication apparatus, and the communication apparatus 90 may be a network device or a chip or a system on chip in the network device. The communication device 90 may be used to perform the functions of the network equipment involved in the above embodiments. The communication device 90 shown in fig. 9 includes: a processing module 901, a sending module 902 and a receiving module 903.

A processing module 901, configured to determine a first blind detection capability of each time window in a first time period according to a partial search space group of at least two search space groups of a terminal, and determine a second blind detection capability of each time window in a second time period according to a partial search space group of the at least two search space groups; the at least two search space groups comprise a first search space group and a second search space group, the first search space group is used for the network equipment to send the PDCCH to the terminal in a first time period, and the second search space group is used for the network equipment to send the PDCCH to the terminal in a second time period; the number of time domain symbols contained in the time window is less than that of time domain symbols contained in the time slot; a sending module 902, configured to send, according to the first blind detection capability, a PDCCH to the terminal in the first time period, and send, according to the second blind detection capability, the PDCCH to the terminal in the second time period.

The specific implementation manner of the communication apparatus 90 may refer to the behavior function of the network device in the communication method described in fig. 3 to fig. 5.

In one possible design, the processing module 901 is specifically configured to determine, according to the first search space group, a first blind detection capability of each time window in the first time period; and determining a second blind detection capability of each time window in a second time period according to the second search space group.

In one possible design, the processing module 901 is specifically configured to determine, according to the first search space group, a first blind detection capability of each time window in the first time period; the first blind detection capability is determined as a second blind detection capability for each time window within a second time period.

In one possible design, the PDCCH blind detection occasions in the first search space group are more than those in the second search space group; or the search space group identification corresponding to the first search space group is smaller than the second search space group; alternatively, the first search space group is the search space group indicated by the processing module 901.

In a possible design, the processing module 901 is further configured to determine, according to the first search space group, the control resource set corresponding to the first search space group, and at least one terminal capability, at least one time window corresponding to each time slot in the first time period; wherein each of the at least one terminal capability is used to indicate a blind detection capability parameter supported by the terminal; the blind detection capability parameter comprises a minimum value X of an interval between starting time domain symbols of every two continuous time windows supported by the terminal and a maximum time domain symbol number Y of every time window supported by the terminal; the processing module 901 is further configured to determine, according to at least one terminal capability and at least one time window corresponding to each time slot, a first blind detection capability of the at least one time window corresponding to each time slot in the first time period.

In one possible design, the communications apparatus further includes a receiving module 903, and the receiving module 903 is configured to receive at least one terminal capability from the terminal.

In one possible design, the sending module 902 is configured to send a PDCCH to a terminal in a first time period according to a first search space group; if the sending module 902 sends DCI to the terminal within the first time period and the DCI instructs the terminal to switch to the second search space group; the PDCCH is transmitted to the terminal according to the second search space group for a second time period.

In a possible design, the processing module 901 is configured to start a timer when the sending module 902 sends the PDCCH to the terminal within a second time period according to the second search space group; the sending module 902 is further configured to send, after the timer expires, the PDCCH to the terminal within the first time period according to the first search space group.

Alternatively, in addition to the behavior function of the network device in the communication method described with reference to fig. 3 to 5, the specific implementation of the communication apparatus 90 may also refer to the behavior function of the network device in the communication method shown in fig. 6 to 7.

The processing module 901 is configured to determine a first blind detection capability of each time window in a first time period according to a partial search space group of at least two search space groups corresponding to the terminal; the at least two search space groups comprise a first search space group and a second search space group, the first search space group is used for the network equipment to send a Physical Downlink Control Channel (PDCCH) to the terminal in a first time period, and the second search space group is used for the network equipment to send the PDCCH to the terminal in a second time period; the number of time domain symbols contained in the time window is less than that of time domain symbols contained in the time slot; a sending module 902, configured to send a PDCCH to a terminal in a first time period according to the first blind detection capability; and sending the PDCCH to the terminal in the second time period according to the second blind detection capability of each time slot in the second time period.

In one possible design, the processing module 901 is specifically configured to determine, according to the first search space group, a first blind detection capability of each time window in the first time period.

In a possible design, the processing module 901 is further configured to start a timer when the sending module 902 sends the PDCCH to the terminal within a second time period according to the second search space group; the sending module 902 is further configured to send, after the timer expires, the PDCCH to the terminal within the first time period according to the first search space group.

As yet another implementation manner, the processing module 901 in fig. 9 may be replaced by a processor, the processor may integrate the functions of the processing module 901, and the transmitting module 902 and the receiving module 903 may be replaced by a transceiver, which may integrate the functions of the transmitting module 902 and the receiving module 903. Further, the communication device 90 shown in fig. 9 may further include a memory. When the processing module 901 is replaced by a processor and the transmitting module 902 and the receiving module 903 are replaced by a transceiver, the communication device 90 according to the embodiment of the present application may be the communication device shown in fig. 2.

The embodiment of the application also provides a computer readable storage medium. All or part of the processes in the above method embodiments may be performed by relevant hardware instructed by a computer program, which may be stored in the above computer-readable storage medium, and when executed, may include the processes in the above method embodiments. The computer-readable storage medium may be an internal storage unit of the terminal (including the data sending end and/or the data receiving end) in any of the foregoing embodiments, for example, a hard disk or a memory of the terminal. The computer readable storage medium may also be an external storage device of the terminal, such as a plug-in hard disk, a Smart Memory Card (SMC), a Secure Digital (SD) card, a flash memory card (flash card), and the like, which are provided on the terminal. Further, the computer-readable storage medium may include both an internal storage unit and an external storage device of the terminal. The computer-readable storage medium stores the computer program and other programs and data required by the terminal. The above-described computer-readable storage medium may also be used to temporarily store data that has been output or is to be output.

It should be noted that the terms "first" and "second" and the like in the description, claims and drawings of the present application are used for distinguishing different objects and not for describing a particular order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.

It should be understood that in the present application, "at least one" means one or more, "a plurality" means two or more, "at least two" means two or three and three or more, "and/or" for describing an association relationship of associated objects, meaning that three relationships may exist, for example, "a and/or B" may mean: only A, only B and both A and B are present, wherein A and B may be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. "at least one of the following" or similar expressions refer to any combination of these items, including any combination of single item(s) or plural items. For example, at least one (one) of a, b, or c, may represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", wherein a, b, c may be single or plural.

Through the above description of the embodiments, it is clear to those skilled in the art that, for convenience and simplicity of description, the foregoing division of the functional modules is merely used as an example, and in practical applications, the above function distribution may be completed by different functional modules according to needs, that is, the internal structure of the device may be divided into different functional modules to complete all or part of the above described functions.

In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described device embodiments are merely illustrative, and for example, the division of the modules or units is only one logical functional division, and there may be other divisions when actually implemented, for example, a plurality of units or components may be combined or may be integrated into another device, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may be one physical unit or a plurality of physical units, that is, may be located in one place, or may be distributed in a plurality of different places. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a readable storage medium. Based on such understanding, the technical solutions of the embodiments of the present application may be essentially or partially contributed to by the prior art, or all or part of the technical solutions may be embodied in the form of a software product, where the software product is stored in a storage medium and includes several instructions to enable a device (which may be a single chip, a chip, or the like) or a processor (processor) to execute all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a U disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk.

The above description is only an embodiment of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions within the technical scope of the present disclosure should be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A method of communication, comprising:

the terminal determines a plurality of search spaces, wherein the search spaces correspond to at least two search space groups; the at least two search space groups comprise a first search space group and a second search space group, the first search space group is used for the terminal to perform Physical Downlink Control Channel (PDCCH) blind detection in a first time period, and the second search space group is used for the terminal to perform PDCCH blind detection in a second time period;

the terminal determines the first blind detection capability of each time window in the first time period according to a part of the at least two search space groups; determining a second blind detection capability of each time window in the second time period according to a part of the at least two search space groups; the number of time domain symbols contained in the time window is less than that of time domain symbols contained in the time slot;

and the terminal performs PDCCH blind detection in the first time period according to the first blind detection capability, and performs PDCCH blind detection in the second time period according to the second blind detection capability.

2. The method of claim 1,

the terminal determines a first blind detection capability of each time window in the first time period according to a part of the at least two search space groups, and the method comprises the following steps:

the terminal determines the first blind detection capability of each time window in the first time period according to the first search space group;

the terminal determines a second blind detection capability of each time window in the second time period according to a part of the at least two search space groups, and the method includes:

and the terminal determines the second blind detection capability of each time window in the second time period according to the second search space group.

3. The method of claim 1,

and the terminal determines the first blind detection capability as a second blind detection capability of each time window in the second time period.

4. The method of claim 3,

the PDCCH blind detection opportunities in the first search space group are more than those in the second search space group; or

The search space group identification corresponding to the first search space group is smaller than the second search space group; or

The first search space group is a search space group indicated by first indication information; wherein the terminal receives the first indication information from a network device.

5. The method according to any one of claims 1 to 4, wherein the first search space group is used for the terminal to perform PDCCH blind detection in a first time period, and the second search space group is used for the terminal to perform PDCCH blind detection in a second time period, and includes:

the terminal performs PDCCH blind detection in the first time period according to the first search space group;

if the terminal receives downlink control information DCI in the first time period, and the DCI indicates that the terminal is switched to the second search space group; and the terminal performs the PDCCH blind detection according to the second search space group in the second time period.

6. The method of claim 5,

the DCI includes second indication information; wherein the second indication information includes a search space group identifier corresponding to the second search space group; or

The DCI includes third indication information; and the third indication information comprises channel occupation time, and the terminal is switched to the second search space group after the channel occupation time is overtime.

7. The method according to any one of claims 1 to 4, wherein the first search space group is used for the terminal to perform PDCCH blind detection in a first time period, and the second search space group is used for the terminal to perform PDCCH blind detection in a second time period, and includes:

the terminal performs PDCCH blind detection in the second time period according to the second search space group, and starts a timer;

and after the timer is overtime, the terminal performs PDCCH blind detection within the first time period according to the first search space group.

8. A method of communication, comprising:

the network equipment determines a first blind detection capability of each time window in a first time period according to a partial search space group in at least two search space groups of the terminal, and determines a second blind detection capability of each time window in a second time period according to the partial search space group in the at least two search space groups; the at least two search space groups include a first search space group and a second search space group, the first search space group is used for the network device to send a Physical Downlink Control Channel (PDCCH) to the terminal in the first time period, and the second search space group is used for the network device to send the PDCCH to the terminal in the second time period; the number of time domain symbols contained in the time window is less than that of time domain symbols contained in the time slot;

and the network equipment sends the PDCCH to the terminal in the first time period according to the first blind detection capability, and sends the PDCCH to the terminal in the second time period according to the second blind detection capability.

9. The method of claim 8,

the network device determines the first blind detection capability according to a partial search space group of the at least two search space groups, including:

the network equipment determines the first blind detection capability of each time window in the first time period according to the first search space group;

the network device determines the second blind detection capability according to a partial search space group of the at least two search space groups, including:

and the network equipment determines the second blind detection capability of each time window in the second time period according to the second search space group.

10. The method of claim 8,

and the network equipment determines the first blind detection capability as a second blind detection capability of each time window in the second time period.

11. The method of claim 10,

The first search space group is a search space group indicated by the network device.

12. The method according to any of claims 8-11, wherein the first search space group is used for the network device to transmit the PDCCH to the terminal in the first time period, and the second search space group is used for the network device to transmit the PDCCH to the terminal in the second time period, comprising:

the network equipment sends a PDCCH to the terminal in the first time period according to the first search space group;

if the network equipment sends Downlink Control Information (DCI) to the terminal in the first time period, and the DCI instructs the terminal to switch to the second search space group; the network device sends the PDCCH to the terminal according to the second search space group in the second time period.

13. The method of claim 12,

The DCI includes third indication information; wherein the third indication information includes channel occupation time, so that the terminal is switched to the second search space group after the channel occupation time is overtime.

14. The method according to any of claims 8-11, wherein the first search space group is used for the network device to transmit the PDCCH to the terminal in the first time period, and the second search space group is used for the network device to transmit the PDCCH to the terminal in the second time period, comprising:

the network equipment sends the PDCCH to the terminal within the second time period according to the second search space group, and starts a timer;

and after the timer is overtime, the network equipment sends the PDCCH to the terminal within the first time period according to the first search space group.

15. A communications apparatus, comprising:

a processing module for determining a plurality of search spaces, the plurality of search spaces corresponding to at least two search space groups; the at least two search space groups comprise a first search space group and a second search space group, the first search space group is used for the processing module to perform PDCCH blind detection in a first time period, and the second search space group is used for the processing module to perform PDCCH blind detection in a second time period;

the processing module is further configured to determine, according to a partial search space group of the at least two search space groups, a first blind detection capability of each time window in the first time period; determining a second blind detection capability of each time window in the second time period according to a part of the at least two search space groups; the number of time domain symbols contained in the time window is less than that of time domain symbols contained in the time slot;

the processing module is further configured to perform PDCCH blind detection in the first time period according to the first blind detection capability, and perform PDCCH blind detection in the second time period according to the second blind detection capability.

16. The apparatus of claim 15, wherein the processing module is specifically configured to:

determining a first blind detection capability of each time window in the first time period according to the first search space group;

and determining a second blind detection capability of each time window in the second time period according to the second search space group.

17. The apparatus of claim 15, wherein the processing module is specifically configured to:

and determining the first blind detection capability as a second blind detection capability of each time window in the second time period.

18. The apparatus of claim 17,

The first search space group is a search space group indicated by first indication information; the communication apparatus further includes a receiving module, configured to receive the first indication information from a network device.

19. The apparatus according to any of claims 15-18, wherein the first search space group is used for the processing module to perform PDCCH blind detection in a first time period, and the second search space group is used for the processing module to perform PDCCH blind detection in a second time period, including:

the processing module is configured to perform PDCCH blind detection within the first time period according to the first search space group;

if the receiving module receives downlink control information DCI in the first time period, and the DCI instructs the processing module to switch to the second search space group; the processing module is further configured to perform PDCCH blind detection according to the second search space group in the second time period.

20. The apparatus of claim 19,

The DCI includes third indication information; the third indication information includes channel occupation time, and the processing module is further configured to switch to the second search space group after the channel occupation time is overtime.

21. The apparatus according to any of claims 15-18, wherein the first search space group is used for the processing module to perform PDCCH blind detection in a first time period, and the second search space group is used for the processing module to perform PDCCH blind detection in a second time period, including:

the processing module is configured to perform PDCCH blind detection in the second time period according to the second search space group, and start a timer;

the processing module is further configured to perform PDCCH blind detection within the first time period according to the first search space group after the timer expires.

22. A communications apparatus, comprising:

the processing module is used for determining a first blind detection capability of each time window in a first time period according to a part of search space groups in at least two search space groups of the terminal, and determining a second blind detection capability of each time window in a second time period according to the part of search space groups in the at least two search space groups; the at least two search space groups include a first search space group and a second search space group, the first search space group is used for the processing module to send a Physical Downlink Control Channel (PDCCH) to the terminal in the first time period, and the second search space group is used for the processing module to send the PDCCH to the terminal in the second time period; the number of time domain symbols contained in the time window is less than that of time domain symbols contained in the time slot;

and the sending module is used for sending the PDCCH to the terminal in the first time period according to the first blind detection capability and sending the PDCCH to the terminal in the second time period according to the second blind detection capability.

23. The apparatus of claim 22, wherein the processing module is specifically configured to:

24. The apparatus of claim 22, wherein the processing module is specifically configured to:

25. The apparatus of claim 24,

The first search space group is a search space group indicated by the processing module.

26. The apparatus of any one of claims 22-25, wherein the first search space group is configured for the processing module to send the PDCCH to the terminal in the first time period, and wherein the second search space group is configured for the processing module to send the PDCCH to the terminal in the second time period, comprising:

the sending module is configured to send the PDCCH to the terminal within the first time period according to the first search space group;

the sending module is further configured to send, if the sending module sends DCI to the terminal in the first time period, where the DCI indicates that the terminal is switched to the second search space group; and transmitting the PDCCH to the terminal according to the second search space group in the second time period.

27. The apparatus of claim 26,

28. The apparatus of any one of claims 22-25, wherein the first search space group is configured for the processing module to send the PDCCH to the terminal in the first time period, and wherein the second search space group is configured for the processing module to send the PDCCH to the terminal in the second time period, comprising:

the processing module is further configured to start a timer when the sending module sends the PDCCH to the terminal within the second time period according to the second search space group;

the sending module is further configured to send the PDCCH to the terminal within the first time period according to the first search space group after the timer expires.

29. A communication device, comprising one or more processors, a transceiver; the one or more processors, the transceiver enable the communication device to perform the communication method of any of claims 1-7 or to perform the communication method of any of claims 8-14.

30. A computer-readable storage medium, characterized in that a computer-readable storage medium stores a computer instruction or a program which, when run on a computer, causes the computer to perform the communication method according to any one of claims 1 to 7 or to perform the communication method according to any one of claims 8 to 14.

31. A communication system, characterized in that the communication system comprises: a terminal and a network device;

the terminal is used for determining a plurality of search spaces, and the search spaces correspond to at least two search space groups; the at least two search space groups comprise a first search space group and a second search space group, the first search space group is used for the terminal to perform Physical Downlink Control Channel (PDCCH) blind detection in a first time period, and the second search space group is used for the terminal to perform PDCCH blind detection in a second time period; the terminal is further configured to determine, according to a part of the at least two search space groups, a first blind detection capability of each time window in the first time period; determining a second blind detection capability of each time window in the second time period according to a part of the at least two search space groups; the number of time domain symbols contained in the time window is less than that of time domain symbols contained in the time slot; the terminal is further used for carrying out PDCCH blind detection within the first time period according to the first blind detection capability and carrying out PDCCH blind detection within the second time period according to the second blind detection capability;

the network device is configured to determine a first blind detection capability of each time window in a first time period according to a partial search space group of at least two search space groups of a terminal, and determine a second blind detection capability of each time window in a second time period according to the partial search space group of the at least two search space groups; the at least two search space groups include a first search space group and a second search space group, the first search space group is used for the network device to send a Physical Downlink Control Channel (PDCCH) to the terminal in the first time period, and the second search space group is used for the network device to send the PDCCH to the terminal in the second time period; the number of time domain symbols contained in the time window is less than that of time domain symbols contained in the time slot; and the network equipment is further used for sending the PDCCH to the terminal in the first time period according to the first blind detection capability, and sending the PDCCH to the terminal in the second time period according to the second blind detection capability.