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WO2022007949A1 - Procédé, appareil et système de communication - Google Patents

Procédé, appareil et système de communication Download PDF

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Publication number
WO2022007949A1
WO2022007949A1 PCT/CN2021/105482 CN2021105482W WO2022007949A1 WO 2022007949 A1 WO2022007949 A1 WO 2022007949A1 CN 2021105482 W CN2021105482 W CN 2021105482W WO 2022007949 A1 WO2022007949 A1 WO 2022007949A1
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WO
WIPO (PCT)
Prior art keywords
search space
space group
terminal
blind detection
time period
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2021/105482
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English (en)
Chinese (zh)
Inventor
马蕊香
官磊
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Filing date
Publication date
Application filed by Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Publication of WO2022007949A1 publication Critical patent/WO2022007949A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0036—Systems modifying transmission characteristics according to link quality, e.g. power backoff arrangements specific to the receiver
    • H04L1/0038—Blind format detection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signalling, i.e. of overhead other than pilot signals

Definitions

  • the present invention relates to the field of communication technologies, and in particular, to a communication method, device and system.
  • a terminal can obtain downlink control information (DCI) carried in the PDCCH through blind detection through a physical downlink control channel (PDCCH).
  • DCI downlink control information
  • PDCH physical downlink control channel
  • the terminal when performing blind PDCCH detection, may determine multiple PDCCH blind detection opportunities 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 opportunities.
  • CORESET control resource set
  • the ability of the terminal to perform PDCCH blind detection is defined.
  • Blind detection wherein, the blind detection capability may include the maximum number of non-overlapping control channel elements (control channel elements, CCEs) and/or the maximum number of candidate PDCCHs for blind detection in a time unit.
  • the terminal cannot detect the PDCCH in time, and cannot schedule the physical downlink shared channel in time.
  • channel, PDSCH physical uplink shared channel
  • PUSCH physical uplink shared channel
  • the purpose of the embodiments of the present application is to provide a communication method, apparatus and system, which can improve the reliability of PDCCH detection.
  • a communication method includes: the terminal determines a plurality of search spaces corresponding to at least two search space groups; the at least two search space groups include a method for the terminal to perform blind PDCCH detection in a first time period The first search space group and the second search space group for the terminal to perform PDCCH blind detection in the second time period, the terminal determines, according to some search space groups in the at least two search space groups, every search space group in the first time period.
  • the first blind detection capability of each time window according to some search space groups in the at least two search space groups, determine the second blind detection capability of each time window in the second time period; wherein, the time domain symbols included in the time window The number is less than the number of time domain symbols included in the slot; 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.
  • the terminal may determine the blind detection of each time window in each time period according to different or identical partial search space groups in the at least two search space groups ability. It is avoided that the terminal determines the blind detection capability of each time window in each time period according to all search space groups, resulting in the determined blind detection capability being too small.
  • the terminal can reasonably select some search space groups to determine the blind detection capability of each time window in each time period, so that the aggregation level corresponding to the PDCCH is larger, and the reliability of the PDCCH is improved.
  • the PDSCH or PUSCH is scheduled in time according to the PDCCH to shorten the network transmission delay.
  • the terminal determines the first blind detection capability of each time window in the first time period according to the first search space group; determines the second blind detection capability of each time window in the second time period according to the second search space group. Blind detection capability.
  • the terminal determines the blind detection capability of each time window in each time segment according to the search space group corresponding to each time segment, and can reasonably determine the blind detection capability of each time window in each time segment.
  • the terminal determines the first blind detection capability of each time window in the first time period according to the first search space group; and determines the first blind detection capability as the first blind detection capability of each time window in the second time period. Second-blind detection capability.
  • the terminal 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 preventing the terminal from In each time period, the blind detection capability of each time window is calculated to reduce the power consumption of the terminal.
  • the terminal receives the first indication information from the network device.
  • the terminal when the terminal adopts the method of determining the first blind detection capability as the second blind detection capability, when calculating the first blind detection capability according to the first search space group, the terminal may use more PDCCH blind detection opportunities
  • the first search space group is determined to be the first search space group, so as to avoid that the blind detection capability determined according to the search space group with fewer PDCCH blind detection opportunities is higher, resulting in higher power consumption of the terminal.
  • the terminal may also use a search space group with a smaller search space group identifier as the first search space group, or may use the search space group indicated in the received first indication information as the first search space group, which is not limited.
  • the terminal determines at least one time window corresponding to each time slot 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; at least Each terminal capability in a terminal capability is used to indicate a blind detection capability parameter supported by the terminal; the blind detection capability parameter includes the minimum value of the interval between the initial time domain symbols of each two consecutive time windows supported by the terminal, X, And the maximum number of time domain symbols Y of each time window supported by the terminal; the terminal determines at least one corresponding 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 First blind detection capability for time windows.
  • the terminal may determine the first search space group and control corresponding to the first search space group according to the first search space group.
  • the resource set and at least one terminal capability determine the first blind detection capability of each time window in the first time period, providing a feasible solution for the terminal to determine the blind detection capability of the time window according to the search space group.
  • the terminal sends at least one terminal capability to the network device.
  • 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 .
  • the terminal performs blind PDCCH detection in the first time period according to the first search space group; if the terminal receives the DCI instructing the terminal to switch to the second search space group within the first time period, the terminal During the second time period, blind detection of the PDCCH is performed according to the second search space group.
  • the terminal when the terminal receives the DCI instructing the terminal to switch to the second search space group within the first time period, the terminal may perform blind PDCCH detection according to the second search space group within the second time period, as The terminal provides a feasible solution for switching the search space group.
  • the DCI includes second indication information; the second indication information includes a search space group identifier 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 terminal After the channel occupancy time expires, switch to the second search space group.
  • the DCI can indicate that the terminal needs to switch to the second search space group by carrying the search space group identifier corresponding to the second search space group; it can also carry the channel occupation time, so that the terminal can use the channel occupation time after the channel occupation time expires to indicate that the terminal needs to switch to the second search space group. , switch to the second search space group.
  • the terminal performs blind PDCCH detection in the second time period according to the second search space group, and starts a timer; after the timer expires, the terminal according to the first search space group, in the first time period. Blind detection of PDCCH is performed within the
  • the terminal can also use a timer to switch search space groups.
  • the terminal can start a timer when using a certain search space group to perform blind PDCCH detection, and switch the search space group after the timer expires. , which provides another feasible solution for the terminal to switch the search space group.
  • the blind detection capability of each time window includes the maximum number of non-overlapping CCEs in each time window and/or the maximum number of candidate PDCCHs for blind detection in the time window.
  • the blind detection capability of the time window may refer to the maximum number of non-overlapping CCEs in the time window, the maximum number of candidate PDCCHs for blind detection in the time window, or the maximum number of non-overlapping CCEs in the time window
  • the maximum number of candidate PDCCHs for blind detection in the number and time window is not limited.
  • a communication device in a second aspect, can implement the functions performed by the terminal in the first aspect or a possible design of the first aspect, and the functions can be implemented by executing corresponding software through hardware.
  • the hardware or software includes one or more modules corresponding to the above functions. For example, processing modules. a processing module configured to determine multiple 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 to perform blind PDCCH detection in a first time period, and a The processing module performs a second search space group for PDCCH blind detection in the second time period; the processing module is further configured to determine, according to part of the search space groups in the at least two search space groups, each time window in the first time period.
  • the first blind detection capability; the second blind detection capability of each time window in the second time period is determined according to some search space groups in the at least two search space groups; wherein, the number of time domain symbols included in the time window is less than the time The number of time domain symbols included in the slot; the processing module is further configured to perform blind PDCCH detection in the first time period according to the first blind detection capability, and perform blind PDCCH detection in the second time period according to the second blind detection capability .
  • the terminal may determine the blind detection capability of each time window in each time period according to different or identical partial search space groups in the at least two search space groups. It is avoided that the terminal determines the blind detection capability of each time window in each time period according to all search space groups, resulting in that the determined blind detection capability is too small.
  • the terminal can reasonably select some search space groups to determine the blind detection capability of each time window in each time period, so that the aggregation level corresponding to the PDCCH is larger, and the reliability of the PDCCH is improved.
  • the PDSCH or PUSCH is scheduled in time according to the PDCCH to shorten the network transmission delay.
  • the processing module is specifically configured to determine the first blind detection capability of each time window in the first time period according to the first search space group; determine each time window in the second time period according to the second search space group; Second-blind detection capability for time windows.
  • the terminal determines the blind detection capability of each time window in each time segment according to the search space group corresponding to each time segment, and can reasonably determine the blind detection capability of each time window in each time segment.
  • the processing module is specifically configured to determine the first blind detection capability of each time window in the first time period according to the first search space group; and determine the first blind detection capability as the second time period. Second blind detection capability per time window.
  • the terminal 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 preventing the terminal from In each time period, the blind detection capability of each time window is calculated to reduce the power consumption of the terminal.
  • the communication apparatus further includes a receiving module, the receiving module is configured to receive the first indication information from the network device.
  • the terminal when the terminal adopts the method of determining the first blind detection capability as the second blind detection capability, when calculating the first blind detection capability according to the first search space group, the terminal may use more PDCCH blind detection opportunities
  • the first search space group is determined to be the first search space group, so as to avoid that the blind detection capability determined according to the search space group with fewer PDCCH blind detection opportunities is higher, resulting in higher power consumption of the terminal.
  • the terminal may also use a search space group with a smaller search space group identifier as the first search space group, or may use the search space group indicated in the received first indication information as the first search space group, which is not limited.
  • 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 at least one terminal capability, the at least one A time window; each terminal capability in the at least one terminal capability is used to indicate the blind detection capability parameter supported by the terminal; the blind detection capability parameter includes the interval between the start time domain symbols of each two consecutive time windows supported by the terminal The minimum value X and the maximum number of time domain symbols Y for each time window supported by the terminal; the processing module is also used to determine the first time period according to at least one terminal capability and at least one time window corresponding to each time slot The first blind detection capability of at least one time window corresponding to each time slot within.
  • the terminal may determine the first search space group and control corresponding to the first search space group according to the first search space group.
  • the resource set and at least one terminal capability determine the first blind detection capability of each time window in the first time period, providing a feasible solution for the terminal to determine the blind detection capability of the time window according to the search space group.
  • the communication apparatus further includes a sending module, which is configured to send at least one terminal capability to the network device.
  • 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 .
  • the processing module is configured to perform blind PDCCH detection within the first time period according to the first search space group; if the receiving module receives an instruction within the first time period to instruct the terminal to switch to the second search space group the DCI, the processing module is configured to perform blind detection of the PDCCH according to the second search space group in the second time period.
  • the terminal when the terminal receives the DCI instructing the terminal to switch to the second search space group within the first time period, the terminal may perform blind PDCCH detection according to the second search space group within the second time period, as The terminal provides a feasible solution for switching the search space group.
  • the DCI includes second indication information; the second indication information includes a search space group identifier 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 The module is used to switch to the second search space group after the channel occupation time expires.
  • the DCI can indicate that the terminal needs to switch to the second search space group by carrying the search space group identifier corresponding to the second search space group; it can also carry the channel occupation time, so that the terminal can use the channel occupation time after the channel occupation time expires to indicate that the terminal needs to switch to the second search space group. , switch to the second search space group.
  • the processing module is configured to perform blind detection of the PDCCH in the second time period according to the second search space group, and start a timer; Search space group, perform blind detection of PDCCH in the first time period.
  • the terminal can also use a timer to switch search space groups.
  • the terminal can start a timer when using a certain search space group to perform blind PDCCH detection, and switch the search space group after the timer expires. , which provides another feasible solution for the terminal to switch the search space group.
  • the blind detection capability of each time window includes the maximum number of non-overlapping CCEs in each time window and/or the maximum number of candidate PDCCHs for blind detection in the time window.
  • the blind detection capability of the time window may refer to the maximum number of non-overlapping CCEs in the time window, the maximum number of candidate PDCCHs for blind detection in the time window, or the maximum number of non-overlapping CCEs in the time window
  • the maximum number of candidate PDCCHs for blind detection in the number and time window is not limited.
  • a communication device in a third aspect, is provided, and the communication device may be a terminal or a chip or a system-on-chip in the terminal.
  • the communication apparatus can implement the functions performed by the terminal in the above aspects or possible designs, and the functions can be implemented by hardware.
  • the communication device may include: a processor.
  • the processor may be used to support the communication apparatus to implement the functions involved in the first aspect or any possible design of the first aspect.
  • the processor may be configured to determine 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 to perform blind PDCCH detection in a first time period, and a second search space group for the processing module to perform blind PDCCH detection in the second time period; the processor may also be used to determine each time period in the first time period according to part of the search space groups in the at least two search space groups The first blind detection capability of the window; the second blind detection capability of each time window in the second time period is determined according to some of the search space groups in the at least two search space groups; wherein, the number of time domain symbols included in the time window is less than the number of time domain symbols contained in the time slot; the processor can also be used 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 Blind detection.
  • the communication device may further include a memory for storing necessary computer-executed instructions and data of the communication device.
  • the processor executes the computer-executable instructions stored in the memory to cause the communication device to perform the communication method described in the first aspect or any possible design of the first aspect.
  • a communication method comprising: a terminal determining a plurality of search spaces corresponding to at least two search space groups, the at least two search space groups including a first search space group and a second search space group, A search space group is used for the terminal to perform PDCCH blind detection in the first time period, and the second search space group is used for the terminal to perform PDCCH blind detection in the second time period; group, determine the first blind detection capability of each time window in the first time period; wherein, the number of time domain symbols included in the time window is less than the number of time domain symbols included in the time slot; the terminal according to the first blind detection capability, in Perform blind detection of PDCCH in the first time period; perform blind detection of PDCCH in the second time period according to the second blind detection capability of each time slot in the second time period.
  • the terminal when the terminal is configured with at least two search space groups at the same time, the terminal may determine, according to the same or different partial search space groups in the at least two search space groups, the Blind detection capability. It is avoided that the terminal determines the blind detection capability of each time window in each time period according to all search space groups, resulting in that the determined blind detection capability is too small.
  • the terminal may reasonably select part of the search space groups to determine the blind detection capability of each time window in at least one time period.
  • the terminal may also determine the blind detection capability of each time slot in another part of the time period based on the time slot.
  • the time window is used in combination with the time slot, 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, and improve the reliability of the PDCCH.
  • the terminal can also detect the PDCCH sent by the network device in time, schedule the PDSCH or PUSCH in time according to the PDCCH, and shorten the network transmission delay.
  • the terminal determines the blind detection capability of each time window in the first time period according to the first search space group.
  • the terminal uses a partial search space group to determine the blind detection capability of each time window in each time period
  • the terminal determines the blind detection capability of each time window in the time period according to the search space group corresponding to each time period
  • the blind detection capability of each time window in each time period can be reasonably determined.
  • the terminal receives the first indication information from the network device.
  • the terminal may determine the search space group with more PDCCH blind detection opportunities as the 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, In order to avoid that the blind detection capability determined based on the time slot in the first time period is small, resulting in waste of the blind detection capability.
  • the terminal may also use a search space group with a smaller search space group identifier as the first search space group, or may use the search space group indicated in the received first indication information as the first search space group, which is not limited.
  • the terminal performs blind PDCCH detection within the first time period according to the 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; Then, the terminal performs blind detection of the PDCCH according to the second search space group within the second time period.
  • the terminal when the terminal receives the DCI instructing the terminal to switch to the second search space group within the first time period, the terminal may perform blind PDCCH detection according to the second search space group within the second time period, as The terminal provides a feasible solution for switching the search space group.
  • the DCI includes second indication information; the second indication information includes a search space group identifier 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 terminal After the channel occupancy time expires, switch to the second search space group.
  • the DCI can indicate that the terminal needs to switch to the second search space group by carrying the search space group identifier corresponding to the second search space group; it can also carry the channel occupation time, so that the terminal can use the channel occupation time after the channel occupation time expires to indicate that the terminal needs to switch to the second search space group. , switch to the second search space group.
  • the terminal performs blind PDCCH detection in the second time period according to the second search space group, and starts a timer; after the timer expires, the terminal according to the first search space group, in the first time period. Blind detection of PDCCH is performed within the
  • the terminal can also use a timer to switch search space groups.
  • the terminal can start a timer when using a certain search space group to perform blind PDCCH detection, and switch the search space group after the timer expires. , which provides another feasible solution for the terminal to switch the search space group.
  • the first blind detection capability of each time window is the maximum number of non-overlapping CCEs in each time window and/or the maximum number of candidate PDCCHs for blind detection in the time window;
  • the second blind detection capability is the maximum number of non-overlapping CCEs per slot and/or the maximum number of candidate PDCCHs for blind detection per slot.
  • the blind detection capability of the time window may refer to the maximum number of non-overlapping CCEs in the time window, the maximum number of candidate PDCCHs for blind detection in the time window, or the maximum number of non-overlapping CCEs in the time window
  • the number of candidate PDCCHs for the maximum blind detection of the number and time window can refer to the maximum number of non-overlapping CCEs in a slot, the maximum number of candidate PDCCHs for blind detection in a slot, or the maximum number of non-overlapping CCEs in a slot and the maximum number of non-overlapping CCEs in a slot.
  • the number of candidate PDCCHs for blind detection is not limited.
  • a communication device in a fifth aspect, can implement the functions performed by the terminal in the fourth aspect or a possible design of the fourth aspect, and the functions can be implemented by executing corresponding software through hardware.
  • the hardware or software includes one or more modules corresponding to the above functions. For example, processing modules.
  • a processing module configured to determine 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 and a second search space group, and the first search space group is used by the terminal at the first time Blind detection of PDCCH is performed in the segment, and the second search space group is used for the terminal to perform blind detection of PDCCH in the second time segment;
  • the processing module is further configured to determine the first time according to some search space groups in the at least two search space groups The first blind detection capability of each time window in the segment; wherein, the number of time domain symbols contained in the time window is less than the number of time domain symbols contained in the time slot; Perform blind detection of PDCCH in a period of time; perform blind detection of PDCCH in the second period of time according to the second blind detection capability of each time slot in the second period of 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. It is avoided that the terminal determines the blind detection capability of each time window in each time period according to all search space groups, resulting in that the determined blind detection capability is too small.
  • the terminal may reasonably select part of the search space groups to determine the blind detection capability of each time window in at least one time period.
  • the terminal may also determine the blind detection capability of each time slot in another part of the time period based on the time slot.
  • the time window is used in combination with the time slot, 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, and improve the reliability of the PDCCH.
  • the terminal can also detect the PDCCH sent by the network device in time, schedule the PDSCH or PUSCH in time according to the PDCCH, and shorten the network transmission delay.
  • the processing module is specifically configured to determine the blind detection capability of each time window in the first time period according to the first search space group.
  • the terminal uses a partial search space group to determine the blind detection capability of each time window in each time period
  • the terminal determines the blind detection capability of each time window in the time period according to the search space group corresponding to each time period
  • the blind detection capability of each time window in each time period can be reasonably determined.
  • the communication apparatus further includes a receiving module, the receiving module is configured to receive the first indication information from the network device.
  • the terminal may determine the search space group with more PDCCH blind detection opportunities as the 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, In order to avoid that the blind detection capability determined based on the time slot in the first time period is small, resulting in waste of the blind detection capability.
  • the terminal may also use a search space group with a smaller search space group identifier as the first search space group, or may use the search space group indicated in the received first indication information as the first search space group, which is not limited.
  • the processing module is configured to perform blind PDCCH detection in the first time period according to the first search space group; if the receiving module receives the DCI in the first time period, and the DCI instructs the terminal to switch to the first time period Two search space groups; the processing module is configured to perform blind detection of the PDCCH according to the second search space group in the second time period.
  • the terminal when the terminal receives the DCI instructing the terminal to switch to the second search space group within the first time period, the terminal may perform blind PDCCH detection according to the second search space group within the second time period, as The terminal provides a feasible solution for switching the search space group.
  • the DCI includes second indication information; the second indication information includes a search space group identifier 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 The module is further configured to switch to the second search space group after the channel occupation time expires.
  • the DCI can indicate that the terminal needs to switch to the second search space group by carrying the search space group identifier corresponding to the second search space group; it can also carry the channel occupation time, so that the terminal can use the channel occupation time after the channel occupation time expires to indicate that the terminal needs to switch to the second search space group. , switch to the second search space group.
  • the processing module is configured to perform blind detection of the PDCCH in the second time period according to the second search space group, and start a timer; Search space group, perform blind detection of PDCCH in the first time period.
  • the terminal can also use a timer to switch search space groups.
  • the terminal can start a timer when using a certain search space group to perform blind PDCCH detection, and switch the search space group after the timer expires. , which provides another feasible solution for the terminal to switch the search space group.
  • the first blind detection capability of each time window is the maximum number of non-overlapping CCEs in each time window and/or the maximum number of candidate PDCCHs for blind detection in the time window;
  • the second blind detection capability is the maximum number of non-overlapping CCEs per slot and/or the maximum number of candidate PDCCHs for blind detection per slot.
  • the blind detection capability of the time window may refer to the maximum number of non-overlapping CCEs in the time window, the maximum number of candidate PDCCHs for blind detection in the time window, or the maximum number of non-overlapping CCEs in the time window
  • the number of candidate PDCCHs for the maximum blind detection of the number and time window can refer to the maximum number of non-overlapping CCEs in a slot, the maximum number of candidate PDCCHs for blind detection in a slot, or the maximum number of non-overlapping CCEs in a slot and the maximum number of non-overlapping CCEs in a slot.
  • the number of candidate PDCCHs for blind detection is not limited.
  • a communication device may be a terminal or a chip or a system-on-chip in the terminal.
  • the communication apparatus can implement the functions performed by the terminal in the above aspects or possible designs, and the functions can be implemented by hardware.
  • 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, 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 is used by the terminal at the first time Perform blind detection of PDCCH within the segment, and the second search space group is used for the terminal to perform blind detection of PDCCH in the second time period; the processor may also be used to determine the first time according to some search space groups in the at least two search space groups The first blind detection capability of each time window in the segment; wherein, the number of time domain symbols included in the time window is less than the number of time domain symbols included in the time slot; Perform blind detection of PDCCH in a period of time; perform blind detection of PDCCH in the second period of time according to the second blind detection capability of each time slot in the second period of time.
  • the communication device may further include a memory for storing necessary computer-executed instructions and data of the communication device.
  • the processor executes the computer-executable instructions stored in the memory to cause the communication device to perform the communication method described in the fourth aspect or any possible design of the fourth aspect.
  • a communication method comprising: a network device determining a first blind detection capability of each time window in a first time period according to a part of the search space groups in at least two search space groups of the terminal, determining the second blind detection capability of each time window in the second time period according to a 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 the 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 included in the time window is less than the time slot The number of time domain symbols included; the network device 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.
  • the network device may determine each time window in each time period according to different or identical partial search space groups in the at least two search space groups corresponding to the terminal blind detection capability. It is avoided that the network device determines the blind detection capability of each time window in each time period according to all search space groups, resulting in that the determined blind detection capability is too small. By reasonably selecting some search space groups, the network device determines the blind detection capability of each time window in each time period, so that the network device can use a reasonable aggregation level to send the PDCCH and improve the reliability of the PDCCH.
  • the blind detection capability sends the PDCCH to the terminal in time, so that the terminal can detect the PDCCH sent by the network device in time, and schedule the PDSCH or PUSCH according to the PDCCH in time to shorten the network transmission delay.
  • 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; the network device determines each time window in the second time period according to the second search space group second-blind detection capability.
  • the network device determines the blind detection capability of each time window in each time segment according to the search space group corresponding to each time segment, and can reasonably determine the blind detection capability of each time window in each time segment.
  • 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; the network device determines the first blind detection capability as each time in the second time period. The second blind detection capability of the window.
  • 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 the network
  • the device calculates the blind detection capability of each time window in each time period to reduce the power consumption of the terminal.
  • the search space group identifier corresponding to the first search space group is smaller than the second search space group; or, the first search space group
  • the space group is the search space group indicated by the network device.
  • the network device may determine the PDCCH blind detection opportunity More search space groups are determined as the first search space group, so as to avoid that the blind detection capability determined according to the search space group with fewer PDCCH blind detection opportunities is larger, resulting in higher power consumption of the terminal.
  • the network device may also use a search space group with a smaller search space group identifier as the first search space group, or may use the search space group indicated by the network device as the first search space group, which is not limited.
  • the network device determines at least one time window corresponding to each time slot 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; Wherein, each terminal capability in the at least one terminal capability is used to indicate a blind detection capability parameter supported by the terminal; the blind detection capability parameter includes the minimum interval between the initial time domain symbols of each two consecutive time windows supported by the terminal The value X, and the maximum number of time domain symbols Y for each time window supported by the terminal; the network device determines 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 The first blind detection capability of the corresponding at least one time window.
  • the network device can determine the first blind detection capability of each time window according to the first search space group and the first search space group The first blind detection capability of each time window within the first time period is determined, which provides a feasible solution for the network device to determine the blind detection capability of the time window according to the search space group.
  • the network device receives at least one terminal capability from the terminal.
  • 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.
  • the network device sends the PDCCH to the terminal within the first time period according to the first search space group; if the network device sends the DCI to the terminal within the first time period, and the DCI instructs the terminal to switch to the second search space group ; then the network device sends the PDCCH to the terminal according to the second search space group within the second time period.
  • the network device when the network device sends a 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 within the second time period, so that the network device can search for Switching of space groups provides a feasible solution.
  • 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; wherein the third indication information includes a channel Occupancy time, so that the terminal switches to the second search space group after the channel occupation time expires.
  • the DCI can indicate that the terminal needs to switch to the second search space group by carrying the search space group identifier corresponding to the second search space group; it can also carry the channel occupation time, so that the terminal can use the channel occupation time after the channel occupation time expires to indicate that the terminal needs to switch to the second search space group. , switch to the second search space group.
  • the network device sends the PDCCH to the terminal within the second time period according to the second search space group, and starts a timer; after the timer expires, the network device according to the first search space group, at the first time
  • the PDCCH is sent to the terminal within the segment.
  • the network device can also use a timer to switch the search space group.
  • the network device can start the timer when using a certain search space group to send the PDCCH to the terminal, and switch the search space after the timer expires.
  • the space group provides another feasible solution for the network device to switch the search space group.
  • the blind detection capability of each time window includes the maximum number of non-overlapping control channel elements CCEs per time window and/or the maximum number of candidate PDCCHs for blind detection per time window.
  • the blind detection capability of the time window may refer to the maximum number of non-overlapping CCEs in the time window, the maximum number of candidate PDCCHs for blind detection in the time window, or the maximum number of non-overlapping CCEs in the time window
  • the maximum number of candidate PDCCHs for blind detection in the number and time window is not limited.
  • a communication apparatus can implement the functions performed by the network equipment in the seventh aspect or possible designs of the seventh aspect, and the functions can be implemented by executing corresponding software through hardware.
  • the hardware or software includes one or more modules corresponding to the above functions. For example, processing module, sending module.
  • the processing module is configured to determine the first blind detection capability of each time window in the first time period according to the partial search space groups in the at least two search space groups of the terminal, and according to the partial search space groups in the at least two search space groups group, to determine the second blind detection capability of each time window in the second time period; at least two search space groups include a first search space group and a second search space group, and the first search space group is used by the network device in the first search space group
  • the PDCCH is sent to the terminal within the time period, and the second search space group is used for the network device to send the PDCCH to the terminal within the second time period; the number of time domain symbols included in the time window is less than the number of time domain symbols included in the time slot; the sending module, using According to the first blind detection capability, the PDCCH is sent to the terminal within the first time period, and the PDCCH is sent to the terminal within the second time period according to the second blind detection capability.
  • the network device may determine the blind detection capability of each time window in each time period according to different or identical partial search space groups in the at least two search space groups corresponding to the terminal. It is avoided that the network device determines the blind detection capability of each time window in each time period according to all search space groups, resulting in that the determined blind detection capability is too small.
  • the network device determines the blind detection capability of each time window in each time period, so that the network device can use a reasonable aggregation level to send the PDCCH and improve the reliability of the PDCCH.
  • the blind detection capability sends the PDCCH to the terminal in time, so that the terminal can detect the PDCCH sent by the network device in time, and schedule the PDSCH or PUSCH according to the PDCCH in time to shorten the network transmission delay.
  • the processing module is specifically configured to determine the first blind detection capability of each time window in the first time period according to the first search space group; determine each time window in the second time period according to the second search space group; Second-blind detection capability for time windows.
  • the network device determines the blind detection capability of each time window in each time segment according to the search space group corresponding to each time segment, and can reasonably determine the blind detection capability of each time window in each time segment.
  • the processing module is specifically configured to determine the first blind detection capability of each time window in the first time period according to the first search space group; determine the first blind detection capability as each time window in the second time period. Second-blind detection capability for one time window.
  • 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 the network
  • the device calculates the blind detection capability of each time window in each time period to reduce the power consumption of the terminal.
  • the search space group identifier corresponding to the first search space group is smaller than the second search space group; or, the first search space group
  • the space group is the search space group indicated by the processing module.
  • the network device when the network device determines the first blind detection capability as the second blind detection capability, when calculating the first blind detection capability according to the first search space group, the network device may determine the PDCCH blind detection opportunity More search space groups are determined as the first search space group, so as to avoid that the blind detection capability determined according to the search space group with fewer PDCCH blind detection opportunities is larger, and the blind detection capability is wasted.
  • the network device may also use a search space group with a smaller search space group identifier as the first search space group, or may use the search space group indicated by the network device as the first search space group, which is not limited.
  • 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 at least one terminal capability, the at least one A time window; wherein, each terminal capability in the at least one terminal capability is used to indicate a blind detection capability parameter supported by the terminal; the blind detection capability parameter includes the interval between the starting time domain symbols of every two consecutive time windows supported by the terminal The minimum value X of the interval and the maximum number of time domain symbols Y of each time window supported by the terminal; the processing module is also used to determine the first time slot according to at least one terminal capability and at least one time window corresponding to each time slot. The first blind detection capability of at least one time window corresponding to each time slot in the time period.
  • the network device can determine the first blind detection capability of each time window according to the first search space group and the first search space group The first blind detection capability of each time window within the first time period is determined, which provides a feasible solution for the network device to determine the blind detection capability of the time window according to the search space group.
  • the communication device further includes a receiving module, the receiving module is configured to receive at least one terminal capability from the terminal.
  • 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.
  • the sending module is configured to send the PDCCH to the terminal within the first time period according to the first search space group; if the sending module sends the DCI to the terminal within the first time period, and the DCI instructs the terminal to switch to the second search space group; then in the second time period, send the PDCCH to the terminal according to the second search space group.
  • the network device when the network device sends a 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 within the second time period, so that the network device can search for Switching of space groups provides a feasible solution.
  • the DCI includes second indication information; the second indication information includes a search space group identifier corresponding to the second search space group; or, the DCI includes third indication information; the third indication information includes the channel occupation time, to Make the terminal switch to the second search space group after the channel occupation time expires.
  • the DCI can indicate that the terminal needs to switch to the second search space group by carrying the search space group identifier corresponding to the second search space group; it can also carry the channel occupation time, so that the terminal can use the channel occupation time after the channel occupation time expires to indicate that the terminal needs to switch to the second search space group. , switch to the second search space group.
  • the processing module is configured to start the timer when the sending module sends the PDCCH to the terminal according to the second search space group within the second time period; A search space group, sending the PDCCH to the terminal within the first time period.
  • the network device can also use a timer to switch the search space group.
  • the network device can start the timer when using a certain search space group to send the PDCCH to the terminal, and switch the search space after the timer expires.
  • the space group provides another feasible solution for the network device to switch the search space group.
  • the blind detection capability of each time window includes the maximum number of non-overlapping control channel elements CCEs per time window and/or the maximum number of candidate PDCCHs for blind detection per time window.
  • the blind detection capability of the time window may refer to the maximum number of non-overlapping CCEs in the time window, the maximum number of candidate PDCCHs for blind detection in the time window, or the maximum number of non-overlapping CCEs in the time window
  • the maximum number of candidate PDCCHs for blind detection in the number and time window is not limited.
  • a communication apparatus may be a network device or a chip or a system-on-a-chip in the network device.
  • the communication apparatus can implement the functions performed by the network equipment in the above aspects or possible designs, and the functions can be implemented by hardware.
  • the communication device may include: a processor and a transceiver.
  • the processor may be configured to determine the first blind detection capability of each time window in the first time period according to the partial search space groups in the at least two search space groups of the terminal, and according to the partial search space groups in the at least two search space groups group, to determine the second blind detection capability of each time window in the second time period; at least two search space groups include a first search space group and a second search space group, and the first search space group is used by the network device in the first search space group
  • the PDCCH is sent to the terminal within the time period, and the second search space group is used for the network device to send the PDCCH to the terminal within the second time period; the number of time domain symbols contained in the time window is less than the number of time domain symbols contained in the time slot; the transceiver can use According to the first blind detection capability, the PDCCH is sent to the terminal within the first time period, and the PDCCH is sent to the terminal within the second time period according to the second blind detection capability.
  • the communication device may further include a memory for storing computer-executed instructions and data necessary for the communication device.
  • the processor executes the computer-executable instructions stored in the memory, so that the communication apparatus executes the communication method described in the seventh aspect or any possible design of the seventh aspect.
  • a communication method comprising: a network device determining a first blind detection capability of each time window within a first time period according to a part of the search space groups in the at least two search space groups corresponding to the terminal ; 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 the physical downlink control channel PDCCH to the terminal within the first time period, and the second search space group is used for The network device sends the PDCCH to the terminal within the second time period; the number of time domain symbols included in the time window is less than the number of time domain symbols included in the time slot; the network device sends the PDCCH to the terminal within the first time period according to the first blind detection capability ; according to the second blind detection capability of each time slot in the second time period, send the PDCCH to the terminal in the second time period.
  • the network device may determine, according to the same or different partial search space groups in the at least two search space groups corresponding to the terminal, that each Blind detection capability of time windows. It is avoided that the network device determines the blind detection capability of each time window in each time period according to all search space groups, resulting in that the determined blind detection capability is too small.
  • the network device may reasonably select part of the search space groups to determine the blind detection capability of each time window in at least one time period.
  • the network device may also determine the blind detection capability of each time slot in another part of the time period based on the time slot.
  • the network device determines the blind detection capability corresponding to each time period by using the time window in combination with the time slot, so that the network device can send the PDCCH with a reasonable aggregation level and improve the reliability of the PDCCH.
  • the ability to send the PDCCH to the terminal in time so that the terminal can detect the PDCCH sent by the network device in time, and schedule the PDSCH or PUSCH in time according to the PDCCH, so as to shorten the network transmission delay.
  • 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.
  • 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.
  • the detection ability can reasonably determine the blind detection ability of each time window in each time period.
  • the search space group identifier corresponding to the first search space group is smaller than the second search space group; or, the first search space group
  • the space group is the search space group indicated by the network device.
  • the network device may determine the search space group with more PDCCH blind detection opportunities as the 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 that the blind detection capability determined based on the time slot is small in the first time period, resulting in waste of the blind detection capability.
  • the network device may also use a search space group with a smaller search space group identifier as the first search space group, or may use the search space group indicated in the received first indication information as the first search space group, which is not limited .
  • the network device sends the PDCCH to the terminal within the first time period according to the first search space group; if the network device sends the downlink control information DCI to the terminal within 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 within the second time period.
  • the network device when the network device sends a 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 within the second time period, so that the network device can search for Switching of space groups provides a feasible solution.
  • 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; wherein the third indication information includes a channel Occupancy time, so that the terminal switches to the second search space group after the channel occupation time expires.
  • the DCI can indicate that the terminal needs to switch to the second search space group by carrying the search space group identifier corresponding to the second search space group; it can also carry the channel occupation time, so that the terminal can use the channel occupation time after the channel occupation time expires to indicate that the terminal needs to switch to the second search space group. , switch to the second search space group.
  • the network device sends the PDCCH to the terminal within the second time period according to the second search space group, and starts a timer; after the timer expires, the network device according to the first search space group, at the first time
  • the PDCCH is sent to the terminal within the segment.
  • the network device can also use a timer to switch the search space group.
  • the network device can start the timer when using a certain search space group to send the PDCCH to the terminal, and switch the search space after the timer expires.
  • the space group provides another feasible solution for the network device to switch the search space group.
  • the first blind detection capability of each time window is the maximum number of non-overlapping control channel elements CCEs in each time window and/or the maximum number of candidate PDCCHs for blind detection in each time window;
  • the second blind detection capability of each time slot is the maximum number of non-overlapping control channel elements CCEs per time slot and/or the maximum number of blindly detected candidate PDCCHs per time slot.
  • the blind detection capability of the time window may refer to the maximum number of non-overlapping CCEs in the time window, the maximum number of candidate PDCCHs for blind detection in the time window, or the maximum number of non-overlapping CCEs in the time window
  • the number of candidate PDCCHs for the maximum blind detection of the number and time window can refer to the maximum number of non-overlapping CCEs in a slot, the maximum number of candidate PDCCHs for blind detection in a slot, or the maximum number of non-overlapping CCEs in a slot and the maximum number of non-overlapping CCEs in a slot.
  • the number of candidate PDCCHs for blind detection is not limited.
  • a communication apparatus in an eleventh aspect, can implement the functions performed by the network equipment in the tenth aspect or possible designs of the tenth aspect, and the functions can be implemented by executing corresponding software through hardware.
  • the hardware or software includes one or more modules corresponding to the above functions.
  • a processing module configured to determine the first blind detection capability of each time window in the first time period according to part of the search space groups in the at least two search space groups corresponding to the terminal; at least two The search space group includes a first search space group and a second search space group, the first search space group is used by the network device to send the physical downlink control channel PDCCH to the terminal within the first time period, and the second search space group is used by the network device in the first time period.
  • 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. It is avoided that the network device determines the blind detection capability of each time window in each time period according to all search space groups, resulting in that the determined blind detection capability is too small.
  • the network device may reasonably select part of the search space groups to determine the blind detection capability of each time window in at least one time period.
  • the network device may also determine the blind detection capability of each time slot in another part of the time period based on the time slot.
  • the network device determines the blind detection capability corresponding to each time period by using the time window in combination with the time slot, so that the network device can send the PDCCH with a reasonable aggregation level and improve the reliability of the PDCCH.
  • the ability to send the PDCCH to the terminal in time so that the terminal can detect the PDCCH sent by the network device in time, and schedule the PDSCH or PUSCH in time according to the PDCCH, so as to shorten the network transmission delay.
  • the processing module is specifically configured to determine the first blind detection capability of each time window in the first time period according to the first search space group.
  • the network device when using partial search space groups to determine the blind detection capability of each time window in each time period, can determine the blind detection capability of each time window in the time period according to the search space group corresponding to each time period.
  • the blind detection capability can reasonably determine the blind detection capability of each time window in each time period.
  • the search space group identifier corresponding to the first search space group is smaller than the second search space group; or, the first search space group
  • the space group is the search space group indicated by the processing module.
  • the network device may determine the search space group with more PDCCH blind detection opportunities as the 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 that the blind detection capability determined based on the time slot is small in the first time period, resulting in waste of the blind detection capability.
  • the network device may also use a search space group with a smaller search space group identifier as the first search space group, or may use the search space group indicated in the received first indication information as the first search space group, which is not limited .
  • the sending module is configured to send the PDCCH to the terminal within the first time period according to the first search space group; if the sending module sends the DCI to the terminal within the first time period, and the DCI instructs the terminal to switch to the second search space group; then in the second time period, send the PDCCH to the terminal according to the second search space group.
  • the network device when the network device sends a 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 within the second time period, so that the network device can search for Switching of space groups provides a feasible solution.
  • the DCI includes second indication information; the second indication information includes a search space group identifier corresponding to the second search space group; or, the DCI includes third indication information; the third indication information includes the channel occupation time, to Make the terminal switch to the second search space group after the channel occupation time expires.
  • the DCI can indicate that the terminal needs to switch to the second search space group by carrying the search space group identifier corresponding to the second search space group; it can also carry the channel occupation time, so that the terminal can use the channel occupation time after the channel occupation time expires to indicate that the terminal needs to switch to the second search space group. , switch to the second search space group.
  • the processing module is also used to start the timer when the sending module sends the PDCCH to the terminal according to the second search space group within the second time period; the sending module is also used to start the timer after the timer times out. , according to the first search space group, send the PDCCH to the terminal within the first time period.
  • the network device can also use a timer to switch the search space group.
  • the network device can start the timer when using a certain search space group to send the PDCCH to the terminal, and switch the search space after the timer expires.
  • the space group provides another feasible solution for the network device to switch the search space group.
  • 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 in each time window; each time slot
  • the second blind detection capability of is the maximum number of non-overlapping CCEs per slot and/or the maximum number of candidate PDCCHs for blind detection per slot.
  • the blind detection capability of the time window may refer to the maximum number of non-overlapping CCEs in the time window, the maximum number of candidate PDCCHs for blind detection in the time window, or the maximum number of non-overlapping CCEs in the time window
  • the number of candidate PDCCHs for the maximum blind detection of the number and time window can refer to the maximum number of non-overlapping CCEs in a slot, the maximum number of candidate PDCCHs for blind detection in a slot, or the maximum number of non-overlapping CCEs in a slot and the maximum number of non-overlapping CCEs in a slot.
  • the number of candidate PDCCHs for blind detection is not limited.
  • a twelfth aspect provides a communication apparatus, where the communication apparatus may be a network device or a chip or a system-on-a-chip in the network device.
  • the communication apparatus can implement the functions performed by the network equipment in the above aspects or possible designs, and the functions can be implemented by hardware.
  • 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, 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 is used by the terminal at the first time Perform blind detection of PDCCH within the segment, and the second search space group is used for the terminal to perform blind detection of PDCCH in the second time period; the processor may also be used to determine the first time according to some search space groups in the at least two search space groups The first blind detection capability of each time window in the segment; wherein, the number of time domain symbols included in the time window is less than the number of time domain symbols included in the time slot; Perform blind detection of PDCCH in a period of time; perform blind detection of PDCCH in the second period of time according to the second blind detection capability of each time slot in the second period of time.
  • the communication device may further include a memory for storing necessary computer-executed instructions and data of the communication device.
  • the processor executes the computer-executable instructions stored in the memory, so that the communication apparatus executes the communication method described in the tenth aspect or any possible design of the tenth aspect.
  • a thirteenth aspect provides a communication device comprising one or more processors and one or more memories; the one or more memories are coupled to the one or more processors, and the one or more memories are used for Stores computer program code or computer instructions; when executed by one or more processors, the computer instructions cause the communication apparatus to perform the communication method as described in the first aspect or any possible design of the first aspect, or to perform the fourth aspect Or the communication method described in any possible design of the fourth aspect, or the communication method described in the seventh aspect or any possible design of the seventh aspect, or the tenth aspect or any of the tenth aspect. A possible design of the described communication method.
  • a fourteenth aspect provides a computer-readable storage medium, the computer-readable storage medium stores computer instructions or programs, and when the computer instructions or programs run on a computer, causes the computer to perform the first aspect or the first aspect
  • a fifteenth aspect provides a computer program product comprising instructions which, when run on a computer, cause the computer to perform the communication method as described in the first aspect or any possible design of the first aspect, or perform as The communication method described in the fourth aspect or any possible design of the fourth aspect, or the communication method described in the seventh aspect or any possible design of the seventh aspect, or the tenth aspect or the tenth aspect.
  • the communication method of any possible design of the aspect is not limited to be performed by the communication method described in the first aspect or any possible design of the first aspect, or perform as The communication method described in the fourth aspect or any possible design of the fourth aspect, or the communication method described in the seventh aspect or any possible design of the seventh aspect, or the tenth aspect or the tenth aspect.
  • a sixteenth aspect provides a chip system, the chip system includes one or more processors and one or more memories; the one or more memories are coupled to the one or more processors, and the one or more memories are Computer program code or computer instructions are stored; when the one or more processors execute the computer program code or computer instructions, the system-on-a-chip is caused to perform as described in the first aspect or any possible design of the first aspect.
  • the communication method described above, or the communication method described in the fourth aspect or any possible design of the fourth aspect, or the communication method described in the seventh aspect or any possible design of the seventh aspect, or The communication method as described in the tenth aspect or any possible design of the tenth aspect is performed.
  • a seventeenth aspect provides a communication system, the communication system comprising the communication device according to any one of the second to third aspects and the communication device according to any one of the eighth to ninth aspects, Or include the communication device according to any one of the fifth to sixth aspects and the communication device according to any one of the eleventh to twelfth aspects.
  • FIG. 1a is a schematic diagram of a PDCCH blind detection opportunity provided by an embodiment of the present application
  • FIG. 1b is a schematic diagram of a time window provided by an embodiment of the present application.
  • FIG. 1c is a schematic diagram of a communication system provided by an embodiment of the present application.
  • FIG. 2 is a structural diagram of a communication device provided by an embodiment of the present application.
  • FIG. 3 is a flowchart of a communication method provided by an embodiment of the present application.
  • 4a is a schematic diagram of a time window provided by an embodiment of the present application.
  • 4b is a schematic diagram of a time window provided by an embodiment of the present application.
  • FIG. 5 is a flowchart of a communication method provided by an embodiment of the present application.
  • FIG. 6 is a flowchart of a communication method provided by an embodiment of the present application.
  • FIG. 7 is a flowchart of a communication method provided by an embodiment of the present application.
  • FIG. 8 is a schematic diagram of the composition of a communication device according to an embodiment of the present application.
  • FIG. 9 is a schematic diagram of the composition of a communication apparatus according to an embodiment of the present application.
  • different subcarrier spacing sizes can correspond to different time slot (slot) lengths, for example, when the subcarrier spacing is 15KHz, the time slot length is 1ms; when the subcarrier spacing is 30KHz, the time slot length is 0.5ms; When the subcarrier spacing is 60KHz, the time slot length is 0.25ms; when the subcarrier spacing is 120KHz, the time slot length is 0.125ms; when the subcarrier spacing is 240KHz, the time slot length is 0.0625ms.
  • each time slot can include 14 time-domain symbols in a common cyclic prefix (CP) mode, and the time-domain symbols can be orthogonal frequency division multiplexing (orthogonal frequency division multiplexing). frequency division multiplexing, OFDM) symbols.
  • a subcarrier in the frequency domain and a time-domain symbol in the time domain are called a resource element (RE).
  • RE resource element
  • REG resource element group
  • CCE control channel element
  • Control resource set (control resource set, CORESET): used to indicate the frequency domain location of the physical downlink control channel (PDCCH) and the number of time domain symbols occupied by the PDCCH in the time domain; The number of time domain symbols occupied on the domain can be 1, 2 or 3.
  • the network device may configure different control resource set identifiers for each control resource set in advance, so as to facilitate distinguishing different control resource sets according to different control resource set identifiers. For example, taking the control resource set including control resource set 1 and control resource set 2 as an example, the control resource set identifier of control resource set 1 can be set to p1, and the control resource set identifier of control resource set 2 can be set to p2.
  • the PDCCH may also be described as a candidate PDCCH, which is not limited.
  • Search space set Each search space set can be associated with a control resource set.
  • the search space set may be a common search space (common search space, CSS) set or a user equipment specific search space (user equipment specific search space, USS) set; CSS is used for transmission and broadcast control channel (broadcast control channel, BCCH) , paging, random access procedure (random access procedure, RAR) and other related cell-level public control information; USS is used to transmit and downlink shared channel (downlink shared channel, DL-SCH), uplink shared channel (uplink shared channel, UL-SCH) and other related user equipment (user equipment, UE) level control information.
  • BCCH broadcast control channel
  • RAR random access procedure
  • USS is used to transmit and downlink shared channel (downlink shared channel, DL-SCH), uplink shared channel (uplink shared channel, UL-SCH) and other related user equipment (user equipment, UE) level control information.
  • different search space set identifiers may be determined in advance for each search space set, so that different search space sets can be distinguished according to different search space set identifiers.
  • the search space set identifier of search space set 1 can be set to s1
  • the search space set identifier of search space set 2 can be set to s2.
  • the search space set may also be described as a search space, which is not limited.
  • each search space is used to indicate the time domain position where the 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, and a search space bias. setting, search space mode, aggregation level, and the number of candidate PDCCHs for each aggregation level.
  • the search space identifier may be used to identify the current search space.
  • the associated control resource set identifier may be used to identify the control resource set associated with the current search space.
  • the search space type can be used to indicate that the current search space is CSS or USS.
  • the search space period can be used to indicate the period length corresponding to the current search space.
  • the search space offset may be used to indicate the offset position of the time slot corresponding to the current search space in the time slot corresponding to the search space period.
  • the search space mode can be used to indicate the starting time domain symbol that needs to perform blind PDCCH detection in each time slot corresponding to the current search space.
  • the aggregation level (aggregation level, AL) may be used to indicate the number of CCEs occupied by the PDCCH; wherein, the aggregation level may be 1, 2, 4, 8 or 16.
  • the number of candidate PDCCHs at each aggregation level can be used to indicate the number of candidate positions that may use the current aggregation level to send PDCCHs.
  • the PDCCH will be sent at 4 PDCCH candidate positions, and the PDCCH aggregation level of each candidate position is 2, that is, each candidate PDCCH occupies 2 CCEs.
  • the specific time slot corresponding to the current search space can 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, according to the search space mode and the control resource set, the specific time domain symbol occupied by the PDCCH that needs to perform PDCCH blind detection in each time slot corresponding to the current search space can be determined, that is, the PDCCH blind detection opportunity .
  • the time slots include time slot 0, time slot 1, time slot 2 and time slot 3, each time slot includes 14 time domain symbols, and each time slot is indicated by a bit field of 14 bits
  • the search space offset is the second
  • the search space mode is 10001000100000
  • the PDCCH in the control resource set associated with the search space The number of time domain symbols occupied in the time domain is 3.
  • the time slot 1 and time slot 3 corresponding to the current search space can be determined.
  • PDCCH blind detection is performed on the 0-2, 4-6, 8-10 time-domain symbols of slot 1 and slot 3; are the PDCCH blind detection opportunity 1 occupying the 0-2 time domain symbols, the PDCCH blind detection opportunity 2 occupying the 4-6 time domain symbols, and the PDCCH blind detection opportunity 3 occupying the 8-10 time domain symbols; Or it is described that there are 3 candidate PDCCHs in time slot 1 and time slot 3 respectively, which are candidate PDCCH1 occupying the 0-2 time-domain symbols, candidate PDCCH2 occupying the 4-6 time-domain symbols, and occupying the 8th time-domain symbol. - Candidate PDCCH3 for 10 time domain symbols.
  • PDCCH blind detection When the network device transmits data with the terminal through the physical downlink shared channel (PDSCH) or the physical uplink shared channel (PUSCH), it can send downlink control information to the terminal.
  • (downlink control information, DCI) PDCCH to indicate the scheduling information of PDSCH or PUSCH, the scheduling information includes: time-frequency resources, modulation and coding methods and other information, so that the terminal can perform data transmission with network equipment through PDSCH or PUSCH.
  • the terminal can obtain the PDCCH bearing the DCI sent by the network device by attempting to decode the information carried in the PDCCH blind detection occasion where the PDCCH may be sent.
  • the terminal may determine the PDCCH blind detection opportunity according to the control resource set and the search space, and use a preconfigured DCI format and a radio network temporary identity (RNTI) to decode the information carried in the PDCCH blind detection opportunity , if the decoding is successful, it is determined that the PDCCH carrying the DCI sent by the network device is received, otherwise other DCI formats and other RNTIs are used to continue decoding until the decoding is successful or all PDCCH blind detection opportunities are blindly detected, or the terminal reaches the Blind detection capability.
  • RNTI radio network temporary identity
  • the blind detection capability of the terminal is used to indicate the capability of the terminal to perform PDCCH blind detection in each time unit.
  • the blind detection capability of each time unit may include the maximum number of non-overlapping CCEs in each time unit and/or the maximum number of candidate PDCCHs for blind detection in each time unit; wherein the time unit may refer to a time slot, It can also refer to a time window.
  • the number of time domain symbols contained in a time window is less than the number of time domain symbols contained in a time slot.
  • it can be 2 time domain symbols, 4 time domain symbols, or 7 time domain symbols; time unit;
  • the maximum number of non-overlapping CCEs may be the maximum number of non-overlapping CCEs for channel estimation in this time unit;
  • the number of candidate PDCCHs for the maximum blind detection of the time unit may be the maximum number of PDCCH blind detections that can be performed in this time unit The number of candidate PDCCHs.
  • the maximum number of non-overlapping CCEs in the time slot is shown in Table 1a
  • the maximum number of blind detection candidates for the time slot is shown in Table 1a.
  • the number of PDCCHs is shown in Table 1b; among them, ⁇ represents a subcarrier interval of 2 ⁇ ⁇ 15KHz.
  • the maximum number of non-overlapping CCEs in the time window is shown in the table.
  • the number of candidate PDCCHs for the maximum blind detection of the time window is shown in Table 2b.
  • the number of candidate PDCCHs for the maximum blind detection of the time window gradually decreases.
  • Terminal capability refers to the blind detection capability parameters (X, Y) supported by the terminal.
  • the blind detection capability parameter may include the minimum value X of the interval between the starting time domain symbols of every two consecutive time windows supported by the terminal, and the maximum number Y of time domain symbols per time window supported by the terminal.
  • the terminal capabilities may include one or more of the following: (2,2), (4,3), (7,3).
  • the terminal may report one or more of the above terminal capabilities to the network device.
  • Time window (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 the blind detection opportunities of the terminal's PDCCH. 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 opportunity, and the time length of the first time window is all supported by the terminal. The maximum value of the minimum value of Y in the terminal capability 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 opportunity not included in the previous time window, and the time length of the next time window is the same as that of the first time window. the same length of time. 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, that is, the time length of the last time window may be smaller than the time length of the time window located in front of it.
  • the blind detection timing used in determining the time window is the most blind detection timing in a time slot. It is assumed that the blind detection timings determined by the search spaces associated with CORESET0, CORESET1 and CORESET2 may be in different time slots, but when determining In 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.
  • each time slot includes the blind detection opportunity determined by the search space associated with CORESET0, the blind detection opportunity determined by the search space associated with CORESET1, and Blind detection timing determined by the search space associated with CORESET2.
  • the terminal capabilities reported by the terminal include (2,2), (4,3) and (7,3), and all control resource sets configured by the terminal include CORESET0, CORESET1 and CORESET2 as an example,
  • the 3 PDCCH blind detection opportunities determined according to CORESET0 and the associated search space are located in the 4th time-domain symbol, the 6th time-domain symbol, and the 11th time-domain symbol, respectively, and the 2 determined according to CORESET1 and the associated search space
  • the PDCCH blind detection opportunities are located in the 1-2 time-domain symbols and the 12-13 time-domain symbols respectively, and one PDCCH blind detection opportunity determined according to CORESET2 and the associated search space is located in the 4-6 time-domain symbols as an example , it can be determined that the starting time domain symbol of the first time window is the first time domain symbol.
  • 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 fourth time domain symbol
  • the time length is 3 time domain symbols
  • the third time window is The starting time domain symbol is the 11th time domain symbol
  • the time length is 3 time domain symbols.
  • the blind detection capability of each time window in a time slot with the same subcarrier interval is the same.
  • the blind detection capability of each time window in each time slot is determined according to the time window of each time slot and the capabilities of all terminals. Specifically, the terminal or network device may determine, according to the minimum value of the interval between the initial time domain symbols of every two consecutive time windows in each time window corresponding to the current time slot, that X in all terminal capabilities is less than or equal to the minimum value.
  • the maximum value of the blind detection capability corresponding to the at least one terminal capability is determined as the blind detection capability of each time window according to the above-mentioned Table 2a and Table 2b.
  • the terminal capability including (2,2), (4,3) and (7,3) as an example
  • the interval between the start time domain symbols of every two consecutive time windows is equal to If the minimum value is 5, it can be determined that at least one terminal capability of which X is less than or equal to the minimum value includes (2,2) and (4,3).
  • (4,3) corresponds to The blind detection capability of is greater than the blind detection capability corresponding to (2, 2), then the blind detection capability corresponding to (4, 3) is determined as the blind detection capability of each time window in each time slot.
  • the terminal determines the time window corresponding to the time slot, if there are more search spaces, the more PDCCH blind detection opportunities are determined according to the control resource set and the search space. In the time window determined according to the PDCCH blind detection opportunities, The smaller the interval between the initial time domain symbols of each two time windows is, the smaller the blind detection capability is.
  • the terminal performs blind detection of PDCCH only according to part of all the search spaces configured in a certain period of time, because the blind detection capability corresponding to each time window determined according to all the search spaces is relatively small, the maximum number of non-overlapping CCEs is relatively small.
  • the network equipment cannot use a larger aggregation level to send the PDCCH, and the reliability of the PDCCH is reduced; at the same time, due to the small blind detection capability of the time window, the number of PDCCHs that the network equipment can send in a time window is reduced.
  • the number of candidate PDCCHs for the terminal to perform blind PDCCH detection in a time window is also reduced, that is, the network equipment cannot send the PDCCH in time, and the terminal cannot detect the PDCCH in time, resulting in PDSCH or PUSCH cannot be scheduled in time, network transmission delay increase.
  • an embodiment of the present application provides a communication method.
  • the terminal can Part of the search space group to determine the blind detection capability of each time window in each time period. It is avoided that the terminal determines the blind detection capability of each time window in each time period according to all search space groups, resulting in that the determined blind detection capability is too small.
  • the terminal can reasonably select some search space groups to determine the blind detection capability of each time window in each time period, so that the aggregation level corresponding to the PDCCH is larger, and the reliability of the PDCCH is improved.
  • the PDSCH or PUSCH is scheduled in time according to the PDCCH to shorten the network transmission delay.
  • the communication method provided by the embodiments of the present application can be used in any communication system, and the communication system may be a third generation partnership project (3GPP) communication system, for example, an LTE communication system, an LTE V2X communication system, or a third generation partnership project (3GPP) communication system. It is a fifth generation (5G) mobile communication system, an NR communication system, an NR V2X communication system, and other next-generation communication systems, and it can also be a non-3GPP communication system without limitation.
  • 3GPP third generation partnership project
  • 5G fifth generation
  • FIG. 1c is a schematic diagram of a communication system provided by an embodiment of the present application. As shown in FIG. 1c, the communication system may include multiple terminals and may also include network devices.
  • the terminal in FIG. 1c may be located within the cell coverage of the network device.
  • the terminal can communicate with the network device through the uplink (uplink, UL) or downlink (downlink, DL) on the air interface, and in the UL direction, the terminal can use the uplink physical layer shared channel (physical sidelink share channel, PUSCH) to send data to the network device; in the DL direction, the network device can send the PDCCH carrying the DCI to the terminal, and can also send data to the terminal through the PDSCH.
  • uplink uplink
  • UL uplink
  • downlink downlink
  • PUSCH physical sidelink share channel
  • the terminal (terminal) in FIG. 1c may be referred to as a user equipment (user equipment, UE), a mobile station (mobile station, MS), or a mobile terminal (mobile terminal, MT) or the like.
  • the terminal in FIG. 1c may be a mobile phone (mobile phone), a tablet computer or a computer with a wireless transceiver function.
  • the terminal can 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, and a smart grid.
  • VR virtual reality
  • AR augmented reality
  • Wireless terminals wireless terminals in smart cities, wireless terminals in smart homes, in-vehicle terminals, vehicles with vehicle-to-vehicle (V2V) capabilities, intelligent networked vehicles, Unmanned aerial vehicles (UAVs) with the ability to communicate with unmanned aerial vehicles (UAVs), etc., are not restricted.
  • the network device in FIG. 1c may be any device with wireless transceiver functions, and is mainly used to implement functions such as wireless physical control, resource scheduling, wireless resource management, wireless access control, and mobility management.
  • the network device may be a device supporting wired access or a device supporting wireless access.
  • the network device may be an access network (access network, AN)/radio access network (radio access network, RAN) device, which is composed of multiple 5G-AN/5G-RAN nodes.
  • 5G-AN/5G-RAN nodes can be: access point (AP), base station (nodeB, NB), enhanced base station (enhance nodeB, eNB), next generation base station (NR nodeB, gNB), transmission and reception A transmission reception point (TRP), a transmission point (TP), or some other access node, etc.
  • multiple terminals and network devices in the embodiments of the present application may be one or more chips, or may be a system on chip (system on chip, SOC), or the like.
  • Figure 1c is only an exemplary drawing, which includes an unlimited number of devices.
  • the communication system may also include other devices.
  • the names of each device and each link in Figure 1c are not limited.
  • each device and each link can also be named with other names. (user equipment, Uu) interface for communication, UL can also be named as Uu link, etc., without limitation.
  • each terminal and network device may adopt the composition structure shown in FIG. 2 , or include the components shown in FIG. 2 .
  • 2 is a schematic diagram of the composition of a communication apparatus 200 provided by an embodiment of the present application.
  • the communication apparatus 200 may be a terminal or a chip or a system-on-chip in a terminal, or a network device or a chip or a system-on-chip in the network device.
  • the communication device 200 includes a processor 201 , a transceiver 202 and a communication line 203 .
  • the communication apparatus 200 may further include a memory 204 .
  • the processor 201 , the memory 204 and the transceiver 202 may be connected through a communication line 203 .
  • the processor 201 is a central processing unit (CPU), a general-purpose processor network processor (NP), a digital signal processing (DSP), a microprocessor, a microcontroller, Programmable logic device (PLD) or any combination thereof.
  • the processor 201 may also be other apparatuses having processing functions, such as circuits, devices or software modules, which are not limited.
  • Transceiver 202 for communicating with other devices or other communication networks.
  • the other communication network may be Ethernet, radio access network (RAN), wireless local area networks (WLAN) and the like.
  • Transceiver 202 may be a module, circuit, transceiver, or any device capable of enabling communication.
  • the communication line 203 is used to transmit information between components included in the communication device 200 .
  • Memory 204 for storing instructions.
  • the instructions may be computer programs.
  • 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, or a random access memory (RAM) or a random access memory (RAM).
  • ROM read-only memory
  • RAM random access memory
  • RAM random access memory
  • RAM random access memory
  • RAM random access memory
  • EEPROM electrically erasable programmable read-only memory
  • CD- ROM compact disc read-only memory
  • optical disc storage including compact discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.
  • the memory 204 may exist independently of the processor 201 , or may be integrated with the processor 201 .
  • the memory 204 may be used to store instructions or program code or some data or the like.
  • the memory 204 may be located in the communication device 200, or may be located 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 methods provided by the following embodiments of the present application.
  • the processor 201 may include one or more CPUs, such as CPU0 and CPU1 in FIG. 2 .
  • the communication apparatus 200 includes a plurality of processors, for example, in addition to the processor 201 in FIG. 2 , a processor 207 may also be included.
  • the communication apparatus 200 further includes an output device 205 and an input device 206 .
  • the input device 206 is a device such as a keyboard, a mouse, a microphone or a joystick
  • the output device 205 is a device such as a display screen, a speaker, and the like.
  • 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 in FIG. 2 .
  • the composition shown in FIG. 3 does not constitute a limitation on the communication device.
  • the communication device may include more or less components than those shown in the figure, or combine some components , or a different component arrangement.
  • the chip system may be composed of chips, or may include chips and other discrete devices.
  • actions, terms, etc. involved in the various embodiments of the present application can be referred to each other, and are not limited.
  • the names of the messages or the names of parameters in the messages exchanged between the devices are just an example, and other names may also be used in the specific implementation, which is not limited.
  • the terminal may be any terminal in the communication system
  • the network device may be any network device in the communication system that is communicatively connected to the terminal
  • the terminal and network device described in the following embodiments may have the components shown in FIG. 2 .
  • FIG. 3 is a flowchart of a communication method provided by an embodiment of the present application. As shown in FIG. 3 , the method may include:
  • Step 301 The network device sends multiple search spaces to the terminal, where the multiple search spaces correspond to at least two search space groups.
  • the terminal receives multiple search spaces, and determines at least two search space groups corresponding to the multiple search spaces.
  • the multiple search spaces may be N search spaces, where 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.
  • the network device may configure multiple search spaces for the terminal at a certain moment, and correspond the multiple search spaces to at least two search space groups, and use one or more of the following manners 1 to 3 to indicate
  • the terminal performs blind detection of PDCCH according to different search space groups in different time periods, so as to avoid the terminal from performing blind detection of PDCCH according to all search spaces all the time, thereby reducing the power consumption of the terminal.
  • each time period may include at least one time slot, or at least one time window, or one or more time domain symbols.
  • the network device may configure the multiple search spaces for the terminal by sending indication information for indicating the multiple search spaces to the terminal.
  • the indication information may be carried in high-level signaling, which may refer to signaling sent by a high-level protocol layer, and the high-level protocol layer is at least one protocol layer above the physical layer, such as: medium access control (medium access control). control, MAC) layer, radio link control (radio link control, RLC) layer, packet data convergence protocol (packet data convergence protocol, PDCP) layer, radio resource control (radio resource control, RRC) layer and non-access layer ( non access stratum, NAS), etc., without restriction.
  • medium access control medium access control
  • RLC radio link control
  • PDCP packet data convergence protocol
  • RRC radio resource control
  • non-access layer non access stratum, NAS
  • the network device configures the terminal with multiple search spaces corresponding to at least two search space groups at a certain moment, which can also be described as the terminal supporting the at least two search space groups at the same time.
  • the network device may indicate the search space group corresponding to each search space by any one or more of the following example 1 or example 2:
  • the network device may configure a search space group identifier (search space group, SS group) for each search space, and the search space group identifier is one of at least two search space group identifiers. According to different search space group identifiers Divide each search space into different search space groups. When the network device sends multiple search spaces configured for the terminal to the terminal, each of the multiple search spaces may carry a search space group identifier corresponding to the search space.
  • search space group search space group, SS group
  • the network device can configure SS group1 for s1 and s2, and configure SS group 2 for s3 to divide the multiple search spaces into two groups.
  • One group is SS group 1 including s1 and s2, and one group is SS group 2 including s3.
  • SS group 1 including s1 and s2
  • SS group 2 including s3.
  • s1 can carry SS group1
  • s2 can carry SS group1
  • s3 can carry SS group2. So that the terminal determines s1 and s2 as one search space group according to SS group1, and determines s3 as another search space group according to SS group2.
  • Example 2 when the network device sends the search space to the terminal, it may carry indication information including the correspondence between each of the at least two search space group identifiers and the search space identifier.
  • the multiple search spaces configured by the network device as the terminal include s1, s2, and s3, and s1 and s2 correspond to SS group 1, and s3 corresponds to SS group 2.
  • the network device sends s1, s2, and s3 to the terminal, it also The indication information that SS group 1 corresponds to s1 and s2, and SS group 2 corresponds to s3 can be sent to the terminal.
  • the network device may instruct the terminal to perform blind PDCCH detection according to different search space groups in different time periods in any one or more of the following manners: manner 1, manner 2, or manner 3:
  • the network device may also send the time period corresponding to each search space group to the terminal.
  • the time period corresponding to each search space group is used to instruct the terminal to perform blind PDCCH detection according to the search space group corresponding to the time period within the time period.
  • the network device may send a message to the terminal indicating that the first search space group corresponds to the first time period, and the second search space group corresponds to the first time period.
  • the group corresponds to the indication information of the second time period.
  • the DCI includes second indication information, where the second indication information includes a search space group identifier, where 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.
  • the terminal receives the DCI, if the search space group corresponding to the current time period does not match the search space group indicated by the DCI, the last symbol of the time domain symbol corresponding to the DCI, the first symbol after the number of P symbols
  • the blind detection of PDCCH according to the search space group corresponding to the current time period is stopped, and the blind detection of PDCCH is started according to the search space group indicated by the DCI. If it matches, continue to use the search space group corresponding to the current time period to perform blind PDCCH detection.
  • P may be pre-configured by the network device to the terminal, or may be pre-specified by the communication protocol, which is not limited.
  • the terminal can determine the current time period corresponding to the DCI as an example. If the search space group does not match the search space group indicated by the DCI, start from the last symbol of the time domain symbol corresponding to the DCI, starting from the first time slot after a number of P symbols, stop performing PDCCH blindness according to the first search space group. detection, and start to perform blind detection of PDCCH according to the second search space group.
  • the terminal may also receive indication information sent by the network device to indicate the 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.
  • the terminal can also switch the search space group corresponding to the current time period to another search space group after receiving the DCI, without judging whether the search space groups match. .
  • the DCI includes third indication information; the third indication information includes the channel occupation time, and the terminal switches to the search space group indicated by the DCI after the channel occupation time expires.
  • the terminal may start from the first time slot after the last time domain symbol number P symbols of the channel occupied time indicated by the DCI, and stop performing the blind detection of the PDCCH according to the search space group corresponding to the current time period , start to perform blind PDCCH detection according to the search space group indicated by the DCI.
  • Mode 3 When the terminal starts to perform blind PDCCH detection according to a certain search space group, the terminal can start a timer, and switch to another search space group after the timer expires.
  • the terminal receives the timer sent by the network device, starts the corresponding timer when performing blind detection of the PDCCH according to the search space group, and starts from the first time slot after the number of P symbols in the time slot corresponding to the timer timeout. , stop PDCCH blind detection according to the current search space group, and start PDCCH blind detection according to other search space groups.
  • the terminal switches to other search space groups after the timer expires according to a preset sequence of search space groups.
  • the terminal when the terminal supports two search space groups at the same time, the terminal can switch to another search space group to start the blind detection of PDCCH after the timer corresponding to the current search space group expires, instead of the above preset
  • the search space group switching is performed in the order of the search space groups.
  • the network device also sends relevant information of the control resource set to the terminal; wherein, for the description of the control resource set, reference may be made to the foregoing description of the control resource set, and details are not repeated.
  • Step 302 The terminal determines the first blind detection capability of each time window in the first time period according to some search space groups in the at least two search space groups.
  • step 302 further includes, the terminal determining the second blind detection capability of each time window in the second time period according to a partial search space group in the at least two search spaces.
  • the terminal when it receives multiple search spaces indicated by the network device, it can determine at least two search space groups corresponding to the multiple search spaces, and search for space groups according to the same or different partial search space groups in the at least two search space groups. , to determine the blind detection capability of each time window in each time period.
  • it can also be described as: when the terminal determines the blind detection capability of each time window within a certain time period according to some of the at least two search space groups, at least one of the at least two search space groups does not. is 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, some of the search space groups used in the at least two search space groups may be the same or different.
  • the terminal when the terminal uses different partial search space groups to determine the blind detection capability for each time window in different time periods, the terminal may determine each time in the current time period according to the search space group corresponding to the current time period. blind detection capability of the window.
  • the terminal taking the at least two search space groups including a first search space group and a second search space group, and the first search space group corresponding to the first time period and the second search space group corresponding to the second time period as an example, the terminal
  • the first blind detection capability of each time window in the first time period may be determined according to the first search space group
  • the second blind detection capability of each time window in the second time period may be determined according to the second search space group.
  • the terminal may determine the specific time-domain symbol position of the PDCCH blind detection opportunity 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, and then determine the first time period All possible PDCCH blind detection opportunities in each time slot, determine the time window corresponding to each time slot according to all possible PDCCH blind detection opportunities in each time slot, and determine each time window according to the time window corresponding to each time slot and the terminal capability.
  • the first blind detection capability of each time window in each time slot may be made to the foregoing related description of the time window, which will not be repeated.
  • the 0-1st time domain symbol of the first time slot and the 4th-1st time domain symbol of the second time slot in the first time period are occupied by the PDCCH blind detection opportunity determined by the terminal according to the first search space group.
  • 5 time domain symbols, the 9th to 10th time domain symbols of the third time slot, and the terminal capabilities determined by the terminal include (2,2), (4,3) and (7,3) as an example.
  • the terminal may determine, according to the PDCCH blind detection opportunities corresponding to the first search space group, the possible PDCCH blind detection opportunities in each time slot in the first time period, including the PDCCH blind detection opportunities occupying the 0-1st time domain symbol.
  • PDCCH blind detection opportunity 2 of 4-5 time domain symbols PDCCH blind detection opportunity 3 occupying the 9th to 10th time domain symbols, according to the three PDCCH blind detection opportunities corresponding to each time slot in the first time period, determine the first
  • Each time slot in a time period includes three time windows, namely time window 1 with the start time domain symbol of the 0th time domain symbol and the time length of 2 time domain symbols, and the start time domain symbol of the 4th time domain symbol.
  • the terminal can determine that in each time slot, the minimum value of the interval between the start time domain symbols of every two consecutive time windows is 4.
  • the terminal capabilities of which X is less than or equal to the minimum value in the capability determination terminal capability include (2, 2) and (4, 3).
  • the detection capability is the blind detection capability corresponding to (4,3).
  • the PDCCH blind detection opportunity determined by the terminal according to the second search space group occupies the 0-1st time domain symbol of the first slot and the 7th-8th time of the second slot in the second time period.
  • domain symbol, and the terminal capabilities determined by the terminal include (2, 2), (4, 3) and (7, 3) as an example, the terminal determines, according to the PDCCH blind detection opportunity corresponding to the second search space group, every time in the second time period
  • the possible PDCCH blind detection opportunities of the time slots include the PDCCH blind detection opportunity 1 occupying the 0-1st time domain symbol, and the PDCCH blind detection opportunity 2 occupying the 7th-8th time domain symbol.
  • the two PDCCH blind detection opportunities corresponding to the time slot determine that each time slot in the second time period includes two time windows, respectively, the initial time domain symbol is the 0th time domain symbol, and the time length is 2 time domain symbols time window 1, the starting time domain symbol is the seventh time domain symbol, and the time length is time window 2 of 2 time domain symbols.
  • the terminal can determine that in each time slot, the minimum value of the interval between the start time domain symbols of each two consecutive time windows is 7.
  • the second blind detection capability of each time window in the second time period is the blind detection capability corresponding to (7, 3).
  • the terminal determines each time period in each time period according to all search space groups.
  • the terminal occupies the 0-1st time-domain symbol, the 4th-5th time-domain symbol, the 4th-5th time-domain symbol, The 7th to 8th time domain symbols and the 9th to 10th time domain symbols, according to the PDCCH blind detection opportunity, determine that each time slot includes 4 time windows, respectively, the starting time domain symbol is the 0th time domain symbol, time Time window 1 with a length of 2 time domain symbols, the starting time domain symbol is the fourth time domain symbol, and time window 2 with a time length of 2 time domain symbols, and the starting time domain symbol is the seventh time domain symbol , a time window 3 with a time length of 2 time domain symbols, and a time window 4 with a start time domain symbol of the 9th time domain symbol and a time length of 2 time domain symbols, it can be determined that in each time slot, each time The minimum value of the interval between the initial time domain symbols of two consecutive time windows is 2. According to the terminal capability and the above Table 2a and Table 2b, it can be determined
  • the blind detection capability corresponding to (2, 2) is smaller than the blind detection capability corresponding to (4, 3), and is also smaller than the blind detection capability corresponding to (7, 3). Therefore, compared to the terminal
  • the blind detection capability of each time window in each time period is determined according to all search space groups, and 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 to be greater, so that the aggregation corresponding to PDCCH The higher the level, the higher the reliability of the PDCCH.
  • the terminal can detect the PDCCH sent by the network device in time, and schedule the PDSCH or PUSCH according to the PDCCH in time to shorten the network transmission delay.
  • the terminal may use the same partial search space group to determine the blind detection capability for each time window in different time periods. That is, the terminal uses the same search space group in at least two search space groups to determine the blind detection capability of each time window in each time period.
  • the terminal may be determined according to the first search space group, and the first blind detection capability may be determined as the second blind detection capability of each time window in the second time period.
  • 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 may determine the second time period according to the search space mode of each search space in the second search space group and the set of control resources associated with the search space.
  • the specific time domain symbol positions of the PDCCH blind detection opportunities and then determine all possible PDCCH blind detection opportunities for each time slot in the second time period, and determine the corresponding PDCCH blind detection opportunities for each time slot according to all possible PDCCH blind detection opportunities in each time slot.
  • time window, 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 to determine the blind detection capability, and thereby reduce the terminal function consumption.
  • the 0-1st time domain symbol of the first time slot and the 4th-1st time domain symbol of the second time slot in the first time period are occupied by the PDCCH blind detection opportunity determined by the terminal according to the first search space group.
  • 5 time domain symbols, the 9th to 10th time domain symbols of the third time slot, and the terminal capabilities determined by the terminal include (2,2), (4,3) and (7,3) as an example.
  • the terminal may determine, according to the PDCCH blind detection opportunities corresponding to the first search space group, the possible PDCCH blind detection opportunities in each time slot in the first time period, including the PDCCH blind detection opportunities occupying the 0-1st time domain symbol.
  • PDCCH blind detection opportunity 2 of 4-5 time domain symbols PDCCH blind detection opportunity 3 occupying the 9th to 10th time domain symbols, according to the three PDCCH blind detection opportunities corresponding to each time slot in the first time period, determine the first
  • Each time slot in a time period includes three time windows, namely time window 1 with the start time domain symbol of the 0th time domain symbol and the time length of 2 time domain symbols, and the start time domain symbol of the 4th time domain symbol.
  • the terminal can determine that in each time slot, the minimum value of the interval between the start time domain symbols of every two consecutive time windows is 4.
  • the terminal capabilities of which X is less than or equal to the minimum value in the capability determination terminal capability include (2, 2) and (4, 3).
  • the detection capability is the blind detection capability corresponding to (4,3).
  • the terminal occupies the 0-1st time domain symbol of the first time slot and the 7th-8th time slot of the second time slot in the second time period with the PDCCH blind detection opportunity determined by the terminal according to the second search space group time domain symbol, and the terminal capabilities determined by the terminal include (2,2), (4,3) and (7,3) as an example, the terminal determines the second time period according to the PDCCH blind detection opportunity corresponding to the second search space group
  • the possible PDCCH blind detection opportunities in each time slot include PDCCH blind detection opportunity 1 occupying the 0-1st time domain symbol, and PDCCH blind detection opportunity 2 occupying the 7th-8th time domain symbol.
  • the two PDCCH blind detection opportunities corresponding to the two time slots determine that each time slot in the second time period includes two time windows, respectively, the initial time domain symbol is the 0th time domain symbol, and the time length is two time domains.
  • the time window 1 of the symbol, the starting time domain symbol is the seventh time domain symbol, and the time length is the time window 2 of 2 time domain symbols. It can 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 blind detection capability corresponding to (4,3).
  • the terminal determines the blind detection capability of each time window in each time period according to the partial search space group, and determines the blind detection capability of each time window in each time period according to the partial search space group with more PDCCH blind detection opportunities, The blind detection capability of each time window in each time period can be appropriately reduced, thereby avoiding large power consumption of the terminal.
  • the search space group identifier corresponding to the first search space group is smaller than the second search space group. It can also be described as determining the blind detection capability of each time window in the time period corresponding to this search space group and the time period corresponding to another search space group based on the search space group with the smaller search space group identifier corresponding to the two search space groups. Blind detection capability within each time window.
  • the terminal may determine the blind detection capability of each time window in each time period according to a part of the search space groups in the at least two search space groups. For example, the terminal may determine the blind detection capability according to a search space group with a smaller search space group ID, or determine the blind detection capability according to a search space group with a larger search space group ID, which is not limited.
  • the terminal determines the blind detection capability of each time window in each time period according to some search space groups, which can improve the blind detection capability of each time window.
  • the detection capability makes the aggregation level corresponding to the PDCCH larger and improves the reliability of the PDCCH. At the same time, it also enables the terminal to detect the PDCCH sent by the network device in time, and schedule the PDSCH or PUSCH according to the PDCCH in time, shortening the network transmission delay.
  • the first search space group is the search space group indicated by the first indication information. It can also be described as determining the blind detection capability of each time window in the time period corresponding to this search space group and the blind detection capability of each time window in the time period corresponding to another search space group based on the search space group indicated by the first indication information. ability.
  • the terminal may receive the 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.
  • the terminal 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, it can simultaneously The first blind detection capability and the second blind detection capability are determined, and the first blind detection capability may also be determined within the first time period, and the second blind detection capability may be determined within the second time period, which is not limited.
  • Step 303 The terminal performs blind detection of the PDCCH within the first time period according to the first blind detection capability.
  • step 303 further includes that the terminal performs blind detection of the PDCCH within the second time period according to the second blind detection capability.
  • the terminal may determine the time window in each time period according to the search space group corresponding to each time period, and based on the time window, determine the blind detection capability corresponding to the time window according to the above step 302, and determine the blind detection capability corresponding to the time window according to the blind detection capability corresponding to the time window. Blind detection of PDCCH is performed within the time window.
  • the terminal determines the first blind detection capability of each time window in the first time period according to the above step 302, based on the first Blind detection capability, performing blind detection of PDCCH in each time window of the first time period.
  • the second blind detection capability of each time window in the second time period is determined according to the above step 302, and based on the second blind detection capability, PDCCH blind detection is performed in each time window of the second time period.
  • the terminal may determine 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 blind detection capability. It is avoided that the terminal determines the blind detection capability of each time window in each time period according to all search space groups, resulting in that the determined blind detection capability is too small.
  • the terminal can reasonably select some search space groups to determine the blind detection capability of each time window in each time period, so that the aggregation level corresponding to the PDCCH is larger, and the reliability of the PDCCH is improved.
  • the PDSCH or PUSCH is scheduled in time according to the PDCCH to shorten the network transmission delay.
  • the same or different partial search space groups in the two search space groups determine the blind detection ability of each time window in each time period, and according to the blind detection ability corresponding to the time window, the direction of each time window in each time period is determined.
  • the terminal sends the PDCCH, so that the network device can send the PDCCH to the terminal based on the same blind detection capability as the terminal, so that the network device can use a reasonable aggregation level to send the PDCCH and improve the reliability of the PDCCH.
  • the network device can use the determined blind detection capability.
  • the PDCCH is sent to the terminal in time, so that the terminal can detect the PDCCH sent by the network device in time, and schedule the PDSCH or PUSCH in time according to the PDCCH, so as to shorten the network transmission delay.
  • FIG. 5 is a flowchart of a communication method provided by an embodiment of the present application. 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 simultaneously supported by the terminal.
  • step 501 for the description of step 501, reference may be made to the specific description of the foregoing step 301, and details are not repeated.
  • Step 502 The network device determines the first blind detection capability of each time window in the first time period according to a part of the search space groups in the at least two search space groups.
  • step 502 further includes that the network device determines the second blind detection capability of each time window in the second time period according to a partial search space group in the at least two search spaces.
  • step 502 For the process of determining the blind detection capability of each time window by the network device in step 502, reference may be made to the process of determining the blind detection capability of each time window by the terminal in the foregoing step 302, which will not be repeated.
  • the network device receives at least one terminal capability sent by the terminal.
  • Step 503 The network device sends the PDCCH to the terminal within the first time period according to the first blind detection capability.
  • step 503 further includes: according to the second blind detection capability, the network device sends the PDCCH to the terminal within the second time period.
  • the network device may determine the time window in each time period according to the search space group corresponding to each time period, and based on the time window, determine the blind detection capability corresponding to the time window according to the above step 502, and according to the blind detection capability corresponding to the time window, PDCCH is performed to the terminal within the time window.
  • different time periods correspond to different search space groups
  • the method for the network device to switch the search space groups in different time periods may refer to any one of the first to third methods in the above step 301.
  • the method in which the terminal switches the search space groups in different time periods in the method will not be repeated.
  • determining the blind detection capability of each time window in each time period according to the same or different partial search space groups in the at least two search space groups referring to FIG.
  • the blind detection capability of each time slot in the other part of the time period is determined based on the time slot, and according to the blind detection capability corresponding to the time slot, each time slot in the other part of the time period sends the PDCCH to the terminal.
  • the time window is used in combination with the time slot, 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, and improve the reliability of the PDCCH.
  • the terminal can also detect the PDCCH sent by the network device in time, schedule the PDSCH or PUSCH in time according to the PDCCH, and shorten the network transmission delay.
  • FIG. 6 is a flowchart of a communication method provided by an embodiment of the present application. As shown in FIG. 6 , the method may include:
  • Step 601 The network device sends multiple search spaces to the terminal, where the multiple search spaces correspond to at least two search space groups.
  • the terminal receives multiple search spaces, and determines at least two search space groups according to the multiple search spaces.
  • step 601 For the specific description of step 601, reference may be made to the foregoing step 301, which will not be repeated.
  • Step 602 The terminal determines the first blind detection capability of each time window in the first time period according to some search space groups in the at least two search space groups.
  • Step 603 The terminal determines the second blind detection capability of each time slot in the second time period.
  • 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 in the at least two search space groups. At the same time, the blind detection capability of each time slot in another part of the time period is determined.
  • the terminal may refer to the method shown in the above step 302, and determine the first time period according to the first search space group. First blind detection capability per time window.
  • the terminal may also refer to the above-mentioned 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.
  • the search space group with more PDCCH blind detection opportunities in the two search space groups uses the time window-based method to determine the blind detection capability of each time window, and the search space group with fewer PDCCH blind detection opportunities uses the time slot-based method. way to determine the blind detection capability of each slot.
  • the terminal determines the blind detection capability based on the time window in the time period with more PDCCH blind detection opportunities, which can appropriately reduce the blind detection capability of each time window in each time period, thereby avoiding large power consumption of the terminal.
  • the blind detection capability of each time window is reduced, due to the large number of time windows, compared with the blind detection capability determined according to the time slot, the total blind detection capability of the time slot including multiple time windows is still greater than that determined according to the time slot.
  • the blind detection capability determined by the time slot can avoid waste of blind detection capability.
  • the search space group identifier corresponding to the first search space group is smaller than the second search space group.
  • the terminal may also determine, according to a search space group with a smaller search space group identifier among the at least two search space groups, that the blind detection capability of the time window is determined in a time window-based manner within the time period corresponding to the search space group, The blind detection capability of a time slot is determined in a time slot-based manner in a time period corresponding to a search space group with a larger search space group identification.
  • the first search space group is the search space group indicated by the first indication information.
  • the terminal receives the first indication information sent by the network device, and determines, according to the search space group indicated by the first indication information, the time window-based method to determine the time window within the time period corresponding to the search space group indicated by the first indication information.
  • Blind detection capability the blind detection capability of the time slot is determined in a time slot-based manner in the time period corresponding to other search space groups, and is not limited.
  • the terminal determines, according to the first search space group, that the possible PDCCH blind detection opportunities in each time slot in the first time period include the PDCCH blind detection opportunity 1 occupying the 0-1st time domain symbol, and the occupancy PDCCH blind detection opportunity 2 of 4-5 time domain symbols, PDCCH blind detection opportunity 3 occupying the 9th to 10th time domain symbols, and the terminal capabilities determined by the terminal include (2,2), (4,3) and ( 7,3) as an example.
  • the terminal may determine, according to possible PDCCH blind detection opportunities in each time slot in the first time period, that each time slot in the first time period includes three time windows, which are that the initial time domain symbol is the 0th time domain symbol, Time window 1 with a time length of 2 time domain symbols, a start time domain symbol of the 4th time domain symbol, a time window 2 of a time length of 2 time domain symbols, and a start time domain symbol of the 9th time domain symbol Domain symbol, time window 3 with a time length of 2 time domain symbols.
  • the terminal can determine that in each time slot, the minimum value of the interval between the start time domain symbols of every two consecutive time windows is 4.
  • the terminal capabilities of which X is less than or equal to the minimum value in the capability determination terminal capability include (2, 2) and (4, 3).
  • the detection capability is the blind detection capability corresponding to (4,3).
  • 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 the above-mentioned Tables 1a and 1b.
  • Step 604 The terminal performs blind detection of the PDCCH within the first time period according to the first blind detection capability.
  • step 604 further includes that the terminal performs blind detection of the PDCCH in the second time period according to the second blind detection capability of each time slot in the second time period.
  • step 604 for the specific description of step 604, reference may be made to the above-mentioned step 303, which will not be repeated.
  • the terminal adopts a time window-based method to determine the blind detection capability in the time period corresponding to some search space groups, and uses the time slot-based method to determine the blind detection ability in the time period corresponding to other partial search space groups.
  • the network device can also determine the blind detection capability in a time window-based manner in the time period corresponding to some search space groups, and determine the blind detection capability in a time slot-based manner in other time periods corresponding to the search space groups, 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 can use a reasonable aggregation level to send the PDCCH and improve the reliability of the PDCCH.
  • the network device can timely send the PDCCH to the terminal according to the determined blind detection capability, This enables the terminal to detect the PDCCH sent by the network device in time, and schedule the PDSCH or PUSCH in time according to the PDCCH, thereby shortening the network transmission delay.
  • Step 701 The network device determines multiple search spaces corresponding to at least two search space groups simultaneously supported by the terminal.
  • step 701 For the description of step 701, reference may be made to the specific description of the foregoing step 301, and details are not repeated.
  • Step 702 The network device determines the first blind detection capability of each time window in the first time period according to some search space groups in the at least two search space groups.
  • Step 703 The network device determines the second blind detection capability of each time slot in the second time period.
  • step 702 and step 703 reference may be made to the above-mentioned step 602 and step 603, which will not be repeated.
  • Step 704 The network device sends the PDCCH to the terminal within the first time period according to the first blind detection capability.
  • step 704 further includes that the network device sends the PDCCH to the terminal within the second time period according to the second blind detection capability.
  • the network device may send the PDCCH to the terminal according to the blind detection capability determined in the foregoing steps 702 and 703 .
  • different time periods correspond to different search space groups
  • the method for the network device to switch the search space groups in different time periods may refer to any one of the first to third methods in the above step 301.
  • the method in which the terminal switches the search space groups in different time periods in the method will not be repeated.
  • each device includes corresponding hardware structures and/or software modules for performing each function.
  • the present application can be implemented in hardware or in the form of a combination of hardware and computer software, in conjunction with the algorithm steps of the examples described in the embodiments disclosed herein. Whether a function is performed by hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functionality using different methods for each particular application, but such implementations should not be considered beyond the scope of this application.
  • each network element may be divided into functional modules according to the foregoing method examples.
  • each functional module may be divided corresponding to each function, or two or more functions may be integrated into one processing module.
  • the above-mentioned integrated modules can be implemented in the form of hardware, and can also be implemented in the form of software function modules. It should be noted that, the division of modules in the embodiments of the present application is schematic, and is only a logical function division, and there may be other division manners in actual implementation.
  • FIG. 8 shows a communication apparatus, and the communication apparatus 80 may be a terminal or a chip or a system-on-chip in the terminal.
  • the communication device 80 may be used to perform the functions of the terminal involved 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 configured to determine multiple 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 blind PDCCH detection in a first time period, and The second search space group used for the processing module 801 to perform blind PDCCH detection in the second time period; the processing module 801 is further configured to determine, according to some search space groups in the at least two search space groups, every search space group in the first time period. The first blind detection capability of each time window; according to some search space groups in the at least two search space groups, determine the second blind detection capability of each time window in the second time period; wherein, the time domain symbols included in the time window The number is less than the number of time domain symbols contained in the slot.
  • the processing module 801 is further configured to perform blind PDCCH detection in the first time period according to the first blind detection capability, and perform blind PDCCH detection in the second time period according to the second blind detection capability.
  • the specific implementation of the communication device 80 may refer to the behavior function of the terminal in the communication method described in FIG. 3 to FIG. 5 .
  • the processing module 801 is specifically configured to determine the first blind detection capability of each time window in the first time period according to the first search space group; determine the first blind detection capability of each time window in the second time period according to the second search space group; Second-blind detection capability for one time window.
  • the processing module 801 is specifically configured to determine the first blind detection capability of each time window in the first time period according to the first search space group; and determine the first blind detection capability as the second time period. Second blind detection capability within each time window.
  • the communication apparatus further includes a receiving module 802, the receiving module 802 is configured to receive the first indication information from the network device.
  • 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 at least one terminal capability, the At least one time window; each terminal capability in the at least one terminal capability is used to indicate a blind detection capability parameter supported by the terminal; the blind detection capability parameter includes the time domain symbols between the starting time domain symbols of every two consecutive time windows supported by the terminal; The minimum value X of the interval and the maximum number of time domain symbols Y for each time window supported by the terminal; the processing module 801 is further configured to determine the first time window according to at least one terminal capability and at least one time window corresponding to each time slot The first blind detection capability of at least one time window corresponding to each time slot in the time period.
  • 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.
  • the processing module 801 is configured to perform blind detection of the PDCCH within the first time period according to the first search space group; if the receiving module 802 receives an instruction within the first time period to switch the terminal to the second search If the DCI of the space group is obtained, the processing module 801 is configured to perform blind detection of the PDCCH according to the second search space group in the second time period.
  • the DCI includes second indication information; the second indication information includes a search space group identifier 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, configured to switch to the second search space group after the channel occupation time expires.
  • the processing module 801 is configured to perform blind detection of the PDCCH within the second time period according to the second search space group, and start a timer; In the first search space group, blind detection of the PDCCH is performed in the first time period.
  • the blind detection capability of each time window includes the maximum number of non-overlapping CCEs per time window and/or the maximum number of candidate PDCCHs for blind detection in the time window.
  • the specific implementation of the above-mentioned communication apparatus 80 may also refer to the communication shown in FIG. 6 to FIG. 7 .
  • the behavior function of the terminal in the method may also refer to the communication shown in FIG. 6 to FIG. 7 .
  • the processing module 801 is configured to determine multiple search spaces corresponding to 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, and the first search space group is used by the terminal in The PDCCH blind detection is performed in the first time period, and the second search space group is used for the terminal to perform the PDCCH blind detection in the second time period; the processing module is further configured to determine according to some search space groups in the at least two search space groups the first blind detection capability of each time window in the first time period; wherein, the number of time domain symbols included in the time window is less than the number of time domain symbols included in the time slot; the processing module 801 is further configured to detect according to the first blind detection The PDCCH blind detection is performed in the first time period; according to the second blind detection capability of each time slot in the second time period, the PDCCH blind detection is performed in the second time period.
  • the processing module 801 is specifically configured to determine the blind detection capability of each time window in the first time period according to the first search space group.
  • the communication apparatus further includes a receiving module 802, the receiving module 802 is configured to receive the first indication information from the network device.
  • the processing module 801 is configured to perform blind PDCCH detection within the first time period according to the first search space group; if the receiving module 802 receives DCI within the first time period, and the DCI instructs the terminal to switch to the second search space group; then the processing module 801 is configured to perform blind detection of the PDCCH according to the second search space group within the second time period.
  • the DCI includes second indication information; the second indication information includes a search space group identifier 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
  • the module 801 is further configured to switch to the second search space group after the channel occupation time expires.
  • the processing module 801 is configured to perform blind detection of the PDCCH within the second time period according to the second search space group, and start a timer; In the first search space group, blind detection of the PDCCH is performed in the first time period.
  • the first blind detection capability of each time window is the maximum number of non-overlapping CCEs in each time window and/or the maximum number of candidate PDCCHs for blind detection in the time window;
  • the second blind detection capability is the maximum number of non-overlapping CCEs per slot and/or the maximum number of candidate PDCCHs for blind detection per slot.
  • the processing module 801 in FIG. 8 can be replaced by a processor, which can integrate the functions of the processing module 801, and the receiving module 802 and the sending module 803 can be replaced by a transceiver, which can be integrated with Functions of the receiving module 802 and the sending module 803 .
  • the communication device 80 shown in FIG. 8 may further include a memory.
  • the processing module 801 is replaced by a processor, and the receiving module 802 and the sending module 803 are replaced by a transceiver
  • the communication device 80 involved in this embodiment of the present application may be the communication device shown in FIG. 2 .
  • FIG. 9 shows a communication apparatus
  • the communication apparatus 90 may be a network device or a chip or a system-on-chip in the network device.
  • the communication apparatus 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 .
  • the processing module 901 is configured to determine the first blind detection capability of each time window in the first time period according to the partial search space groups in the at least two search space groups of the terminal, and according to the partial search space groups in the at least two search space groups A space group, determining the second blind detection capability of each time window in the second time period; 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 is used by the network device in the first search space group
  • the PDCCH is sent to the terminal within a time period, and the second search space group is used for the network device to send the PDCCH to the terminal within the second time period; the number of time domain symbols included in the time window is less than the number of time domain symbols included in the time slot; sending module 902 , for sending the PDCCH to the terminal within the first time period according to the first blind detection capability, and sending the PDCCH to the terminal within the second time period according to the second blind detection capability.
  • the specific implementation 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 .
  • the processing module 901 is specifically configured to determine the first blind detection capability of each time window in the first time period according to the first search space group; determine the first blind detection capability of each time window in the second time period according to the second search space group; Second-blind detection capability for one time window.
  • the processing module 901 is specifically configured to determine the first blind detection capability of each time window in the first time period according to the first search space group; determine the first blind detection capability as the second time period. Second blind detection capability per time window.
  • the search space group identifier corresponding to the first search space group is smaller than the second search space group; or, the first search space group
  • the space group is the search space group indicated by the processing module 901 .
  • 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, the At least one time window; wherein, each terminal capability in the at least one terminal capability is used to indicate a blind detection capability parameter supported by the terminal; the blind detection capability parameter includes the difference between the starting time domain symbols of each two consecutive time windows supported by the terminal. The minimum value X of the interval between and the maximum number of time domain symbols Y of each 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 The first blind detection capability of at least one time window corresponding to each time slot in the first time period.
  • the communication apparatus further includes a receiving module 903, the receiving module 903 is configured to receive at least one terminal capability from the terminal.
  • the sending module 902 is configured to send the PDCCH to the terminal within the first time period according to the first search space group; if the sending module 902 sends the DCI to the terminal within the first time period, and the DCI instructs the terminal to switch to the second search space group; then, within the second time period, send the PDCCH to the terminal according to the second search space group.
  • the DCI includes second indication information; the second indication information includes a search space group identifier corresponding to the second search space group; or, the DCI includes third indication information; the third indication information includes the channel occupation time, to Make the terminal switch to the second search space group after the channel occupation time expires.
  • the processing module 901 is used for the sending module 902 to start the timer when sending the PDCCH to the terminal according to the second search space group within the second time period; the sending module 902 is also used to start the timer after the timer times out. , according to the first search space group, send the PDCCH to the terminal within the first time period.
  • the blind detection capability of each time window includes the maximum number of non-overlapping control channel elements CCEs per time window and/or the maximum number of candidate PDCCHs for blind detection per time window.
  • the specific implementation of the above-mentioned communication apparatus 90 may also refer to those shown in FIG. 6 to FIG. 7 .
  • the behavioral function of a network device in a communication method may also refer to those shown in FIG. 6 to FIG. 7 .
  • the processing module 901 is configured to determine the first blind detection capability of each time window in the first time period according to a part of the search space groups in the at least two search space groups corresponding to the terminal; the at least two search space groups include the first blind detection capability of each time window in the first time period; A search space group and a second search space group, the first search space group is used by the network device to send the physical downlink control channel PDCCH to the terminal within the first time period, and the second search space group is used by the network device to send the terminal to the terminal within the second time period Sending the PDCCH; the number of time domain symbols included in the time window is less than the number of time domain symbols included in the time slot; the sending module 902 is configured to send the PDCCH to the terminal within the first time period according to the first blind detection capability; according to the second time The second blind detection capability of each time slot in the segment, and the PDCCH is sent to the terminal in the second time segment.
  • the processing module 901 is specifically configured to determine the first blind detection capability of each time window in the first time period according to the first search space group.
  • the search space group identifier corresponding to the first search space group is smaller than the second search space group; or, the first search space group
  • the space group is the search space group indicated by the processing module 901 .
  • the sending module 902 is configured to send the PDCCH to the terminal within the first time period according to the first search space group; if the sending module 902 sends the DCI to the terminal within the first time period, and the DCI instructs the terminal to switch to the second search space group; then, within the second time period, send the PDCCH to the terminal according to the second search space group.
  • the DCI includes second indication information; the second indication information includes a search space group identifier corresponding to the second search space group; or, the DCI includes third indication information; the third indication information includes the channel occupation time, to Make the terminal switch to the second search space group after the channel occupation time expires.
  • the processing module 901 is further configured to start the timer when the sending module 902 sends the PDCCH to the terminal according to the second search space group within the second time period; the sending module 902 is also configured to start the timer at the timing After the timer expires, the PDCCH is sent to the terminal within the first time period according to the first search space group.
  • 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 in each time window; each time slot
  • the second blind detection capability of is the maximum number of non-overlapping CCEs per slot and/or the maximum number of candidate PDCCHs for blind detection per slot.
  • the processing module 901 in FIG. 9 can be replaced by a processor, which can integrate the functions of the processing module 901, and the sending module 902 and the receiving module 903 can be replaced by a transceiver, which can be integrated with Functions of the sending module 902 and the receiving module 903 .
  • the communication device 90 shown in FIG. 9 may further include a memory.
  • the processing module 901 is replaced by a processor, and the sending module 902 and the receiving module 903 are replaced by a transceiver
  • the communication device 90 involved in this embodiment of the present application may be the communication device shown in FIG. 2 .
  • Embodiments of the present application also provide a computer-readable storage medium. All or part of the processes in the above method embodiments can be completed by instructing the relevant hardware by a computer program, the program can be stored in the above computer-readable storage medium, and when the program is executed, it can 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, such as a hard disk or a memory of the terminal.
  • the above-mentioned computer-readable storage medium can also be an external storage device of the above-mentioned terminal, such as a plug-in hard disk equipped on the above-mentioned terminal, a smart memory card (smart media card, SMC), a secure digital (secure digital, SD) card, flash memory card (flash card) etc. Further, the above-mentioned computer-readable storage medium may also include both an internal storage unit of the above-mentioned terminal and an external storage device.
  • the above-mentioned computer-readable storage medium is used to store the above-mentioned computer program and other programs and data required by the above-mentioned terminal.
  • the above-mentioned computer-readable storage medium can also be used to temporarily store data that has been output or is to be output.
  • At least one (item) refers to one or more
  • multiple refers to two or more
  • at least two (item) refers to two or three And three or more
  • "and/or” is used to describe the association relationship of related objects, indicating that three kinds of relationships can exist, for example, “A and/or B” can mean: only A exists, only B exists, and A exists at the same time and B three cases, where A, B can be singular or plural.
  • the character “/” generally indicates that the associated objects are an "or” relationship.
  • At least one item(s) below” or similar expressions thereof refer to any combination of these items, including any combination of single item(s) or plural items(s).
  • At least one (a) of a, b or c can mean: a, b, c, "a and b", “a and c", “b and c", or "a and b and c" ", where a, b, c can be single or multiple.
  • the disclosed apparatus and method may be implemented in other manners.
  • the device embodiments described above are only illustrative.
  • the division of the modules or units is only a logical function division. In actual implementation, there may be other division methods.
  • multiple units or components may be Incorporation may either be integrated into another device, or some features may be omitted, or not implemented.
  • the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and the components shown as units may be one physical unit or multiple physical units, that is, they may be located in one place, or may be distributed to multiple different places . Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit.
  • the above-mentioned integrated units may be implemented in the form of hardware, or may be implemented in the form of software functional units.
  • the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it may be stored in a readable storage medium.
  • the technical solutions of the embodiments of the present application can be embodied in the form of software products in essence, or the parts that contribute to the prior art, or all or part of the technical solutions, which are stored in a storage medium , including several instructions to make a device (may be a single chip microcomputer, a chip, etc.) or a processor (processor) to execute all or part of the steps of the methods described in the various embodiments of the present application.
  • the aforementioned storage medium includes: a U disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk and other mediums that can store program codes.

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  • Mobile Radio Communication Systems (AREA)

Abstract

Sont fournis un procédé, un appareil et un système de communication, qui se rapportent au domaine des communications, et peuvent améliorer le problème technique de la fiabilité d'un PDCCH et d'un retard de transmission réseau qui sont altérés du fait qu'il est impossible de déterminer de manière rationnelle une capacité de détection aveugle. Le procédé consiste à : déterminer par un terminal une pluralité d'espaces de recherche correspondant à au moins deux groupes d'espaces de recherche, lesdits au moins deux groupes d'espaces de recherche comprenant un premier groupe d'espaces de recherche et un second groupe d'espaces de recherche, le premier groupe d'espaces de recherche étant utilisé pour que le terminal effectue une détection aveugle de PDCCH dans une première période de temps, et le second groupe d'espaces de recherche étant utilisé pour que le terminal effectue une détection aveugle de PDCCH dans une seconde période de temps ; déterminer par le terminal, en fonction de certains groupes d'espaces de recherche desdits au moins deux groupes d'espaces de recherche, une première capacité de détection aveugle de chaque fenêtre temporelle dans la première période de temps ; déterminer, en fonction de certains groupes d'espaces de recherche desdits au moins deux groupes d'espaces de recherche, une seconde capacité de détection aveugle de chaque fenêtre temporelle dans la seconde période de temps ; et effectuer une détection aveugle de PDCCH dans la première période de temps en fonction de la première capacité de détection aveugle, et effectuer une détection aveugle de PDCCH dans la seconde période de temps en fonction de la seconde capacité de détection aveugle.
PCT/CN2021/105482 2020-07-10 2021-07-09 Procédé, appareil et système de communication Ceased WO2022007949A1 (fr)

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