WO2019214722A1 - 候选信道映射方法、装置、基站、终端及存储介质 - Google Patents

候选信道映射方法、装置、基站、终端及存储介质 Download PDF

Info

Publication number
WO2019214722A1
WO2019214722A1 PCT/CN2019/086439 CN2019086439W WO2019214722A1 WO 2019214722 A1 WO2019214722 A1 WO 2019214722A1 CN 2019086439 W CN2019086439 W CN 2019086439W WO 2019214722 A1 WO2019214722 A1 WO 2019214722A1
Authority
WO
WIPO (PCT)
Prior art keywords
pdcch
search space
user
specific search
pdcch candidates
Prior art date
Application number
PCT/CN2019/086439
Other languages
English (en)
French (fr)
Inventor
贺海港
郝鹏
张晨晨
毕峰
刘文豪
Original Assignee
中兴通讯股份有限公司
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Publication of WO2019214722A1 publication Critical patent/WO2019214722A1/zh

Links

Images

Classifications

    • 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 signaling, i.e. of overhead other than pilot signals

Definitions

  • the present disclosure relates to the field of communications technologies, and in particular, to a candidate channel mapping method, apparatus, base station, terminal, and storage medium.
  • downlink control information is carried by a Physical Downlink Control Channel (PDCCH).
  • PDCH Physical Downlink Control Channel
  • the base station selects at least one PDCCH candidate among the plurality of PDCCH candidates as the final PDCCH channel.
  • the terminal does not know which of the multiple PDCCH candidates the base station selects which PDCCH candidate is the final PDCCH channel. Therefore, the terminal needs to try PDCCH demodulation and decoding one by one among a plurality of PDCCH candidates.
  • each PDCCH candidate is usually distributed on one or more aggregation levels (AL), and for each aggregation level, usually includes multiple PDCCH candidates.
  • the aggregation level refers to the number of Control Channel Elements (CCEs) included in one PDCCH candidate. For example, if the aggregation level is 4, then each PDCCH candidate at the aggregation level is composed of 4 CCEs. It can be seen from the foregoing description that the more the number of PDCCH candidates, the more the number of PDCCH candidates that the terminal needs to detect blindly, and therefore, the more the number of CCEs that need channel estimation.
  • a set of search spaces which are mainly used to determine which aggregation levels the PDCCH can use, and the number of PDCCH candidates at a specific aggregation level, and the PDCCH period and the time domain location. And other information.
  • a plurality of PDCCH candidates may be included in one search space set, and different search space sets may have different periods, which may cause multiple search space sets to be located on the same time slot, for example, as shown in FIG.
  • the slot 11 position and the slot 12 position are simultaneously present with the search space set 1 and the search space set 2.
  • the total number of PDCCH candidates on the time slot will increase significantly, so the number of blind detections of the PDCCH and the number of CCEs required for channel estimation will also increase significantly.
  • the number of PDCCH candidates on each search space and/or the number of CCEs that need to perform channel estimation may exceed the capabilities supported by User Equipment (UE).
  • UE User Equipment
  • a feasible idea is to filter and reserve PDCCH candidates in one slot, so that the number of PDCCH candidates finally reserved on one slot and/or the CCEs that are finally reserved for channel estimation are required. The number is within the capabilities supported by the UE. Based on this feasible approach, it is necessary to provide an effective mechanism for screening and retaining PDCCH candidates.
  • the embodiments of the present disclosure provide a candidate channel mapping method, device, base station, terminal, and storage medium.
  • the main technical problem is to provide a mechanism for screening and retaining PDCCH candidates.
  • an embodiment of the present disclosure provides a candidate channel mapping method, including:
  • the user-specific search space set comprising a first set of user-specific search space sets and/or a second set of user-specific search space sets;
  • the first set of user-specific search space sets includes one or more first user-specific search space sets
  • the second set of user-specific search space sets includes one or more second user-specific search space sets.
  • the embodiment of the present disclosure further provides a candidate channel mapping method, including:
  • An embodiment of the present disclosure further provides a candidate channel mapping apparatus, including:
  • a user-specific search space set first determining module configured to determine a user-specific search space set of the terminal;
  • the user-specific search space set includes a first set of user-specific search space sets and/or a second set of user-specific search space sets;
  • the first set of user-specific search space sets includes one or more first user-specific search space sets;
  • the second set of user-specific search space sets includes one or more second user-specific search space sets;
  • a PDCCH candidate first mapping module configured to map PDCCH candidates in a first set of user-specific search space sets using a first mapping rule; and to map PDCCH candidates in a second set of user-specific search space sets using a second mapping rule.
  • An embodiment of the present disclosure further provides a candidate channel mapping apparatus, including:
  • a user-specific search space set third determining module configured to determine a third set of user-specific search space sets of the terminal, where the third set of user-specific search space sets includes one or more third user-specific search space sets;
  • a PDCCH candidate third mapping module configured to map the PDCCH candidate in the third set of user-specific search space sets according to the carrier index and the search space set index.
  • An embodiment of the present disclosure further provides a candidate channel mapping apparatus, including:
  • a user-specific search space set first determining unit configured to determine a user-specific search space set of the terminal;
  • the user-specific search space set includes a first set of user-specific search space sets and/or a second set of user-specific search space sets;
  • the first set of user-specific search space sets includes one or more first user-specific search space sets;
  • the second set of user-specific search space sets includes one or more second user-specific search space sets;
  • a PDCCH candidate first mapping unit configured to map a PDCCH candidate in a first set of user-specific search space sets by using a first mapping rule
  • the PDCCH candidate second mapping unit is configured to map the PDCCH candidate in the second set of user-specific search space sets by using the second mapping rule.
  • the embodiment of the present disclosure further provides a base station, including: a first processor, a first memory, and a first communication bus;
  • the first communication bus is configured to implement connection communication between the first processor and the first memory
  • the first processor is configured to execute one or more first programs stored in the first memory to implement the steps of the first candidate channel mapping method described above;
  • the first processor is further configured to execute one or more second programs stored in the first memory to implement the step of the second candidate channel mapping method.
  • the embodiment of the present disclosure further provides a terminal, including: a second processor, a second memory, and a second communication bus;
  • the second communication bus is configured to implement connection communication between the second processor and the second memory
  • the second processor is configured to execute one or more third programs stored in the second memory to implement the steps of the first candidate channel mapping method described above;
  • the second processor is configured to execute one or more fourth programs stored in the second memory to implement the steps of the second candidate channel mapping method.
  • Embodiments of the present disclosure also provide a storage medium having stored therein computer executable instructions for performing a candidate channel mapping method of any of the foregoing.
  • two sets of mechanisms for screening and retaining PDCCH candidates are provided, wherein one set includes the first set of user-specific search spaces by configuring the terminal.
  • a collection of user-specific search spaces for a collection and/or a second set of user-specific search spaces (the first set of user-specific search space sets contains one or more first user-specific search space sets, and the second set of user-specific search space sets contains one Or a plurality of second user-specific search space sets), mapping the PDCCH candidates in the first set of user-specific search space sets using the first selection rule, and mapping the PDCCH candidates in the second set of user-specific search space sets using the second selection rule , thereby implementing screening of PDCCH candidates.
  • the other set by configuring a third set of user-specific search space sets for the terminal (the third set of user-specific search space sets contains one or more third user-specific search space sets), and then according to the carrier index in the current time slot. And searching the space set index to map PDCCH candidates in the third set of user-specific search space sets, thereby implementing screening of PDCCH candidates.
  • FIG. 1 is a schematic diagram of a plurality of search space sets on a time slot in the related art
  • FIG. 2 is a schematic flowchart of a candidate channel mapping method on a base station side according to Embodiment 1 of the present disclosure
  • FIG. 3 is a schematic diagram of partitioning a search space set according to various embodiments of the present disclosure
  • FIG. 4 is a schematic diagram of mapping of PDCCH candidates in a user-specific search space set according to various embodiments of the present disclosure
  • FIG. 5 is a schematic diagram of mapping of PDCCH candidates in another user-specific search space set according to various embodiments of the present disclosure
  • FIG. 6 is a schematic diagram of mapping of PDCCH candidates in another user-specific search space set according to various embodiments of the present disclosure
  • FIG. 7 is a schematic diagram of mapping of PDCCH candidates in another user-specific search space set according to various embodiments of the present disclosure.
  • FIG. 8 is a schematic diagram of mapping of PDCCH candidates in another user-specific search space set according to various embodiments of the present disclosure
  • FIG. 9 is a schematic diagram of mapping of PDCCH candidates in another user-specific search space set according to various embodiments of the present disclosure.
  • FIG. 10 is a schematic diagram of mapping of PDCCH candidates in another user-specific search space set according to various embodiments of the present disclosure.
  • FIG. 11 is a schematic diagram of mapping of PDCCH candidates in another user-specific search space set according to various embodiments of the present disclosure.
  • FIG. 12 is a schematic diagram of mapping of PDCCH candidates in another user-specific search space set according to various embodiments of the present disclosure
  • FIG. 13 is a schematic diagram of a user-specific search space set mapping on a carrier according to various embodiments of the present disclosure
  • FIG. 14 is a schematic diagram of another user-specific search space set mapping on a carrier according to various embodiments of the present disclosure.
  • FIG. 15 is a schematic flowchart of a candidate channel mapping method on a terminal side according to Embodiment 1 of the present disclosure
  • FIG. 16 is a schematic flowchart of a candidate channel mapping method on a base station side according to Embodiment 2 of the present disclosure
  • FIG. 17 is a schematic diagram of another user-specific search space set mapping on a carrier according to various embodiments of the present disclosure.
  • FIG. 18 is a schematic diagram of a user-specific search space set mapping on a carrier on a multi-slot according to various embodiments of the present disclosure
  • FIG. 19 is a schematic flowchart of a candidate channel mapping method on a terminal side according to Embodiment 2 of the present disclosure.
  • FIG. 20 is a schematic structural diagram of a candidate channel mapping apparatus that can be applied to a base station according to Embodiment 11 of the present disclosure
  • FIG. 21 is a schematic structural diagram of a candidate channel mapping apparatus that can be applied to a base station according to Embodiment 11 of the present disclosure
  • FIG. 22 is a schematic structural diagram of a candidate channel mapping apparatus that can be applied to a terminal according to Embodiment 11 of the present disclosure
  • FIG. 23 is a schematic structural diagram of a candidate channel mapping apparatus that can be applied to a terminal according to Embodiment 11 of the present disclosure.
  • FIG. 24 is a schematic structural diagram of a candidate channel mapping apparatus that can be applied to a base station according to Embodiment 12 of the present disclosure
  • FIG. 25 is a schematic structural diagram of a candidate channel mapping apparatus that can be applied to a base station according to Embodiment 12 of the present disclosure
  • FIG. 26 is a schematic structural diagram of a candidate channel mapping apparatus that can be applied to a terminal according to Embodiment 12 of the present disclosure
  • FIG. 27 is a schematic structural diagram of a candidate channel mapping apparatus that can be applied to a terminal according to Embodiment 12 of the present disclosure
  • FIG. 28 is a schematic structural diagram of a candidate channel mapping apparatus that can be applied to a base station according to Embodiment 13 of the present disclosure
  • FIG. 29 is a schematic structural diagram of a PDCCH candidate second mapping unit according to Embodiment 13 of the present disclosure.
  • FIG. 30 is a more detailed structural diagram of a candidate channel mapping apparatus that can be applied to a base station according to Embodiment 13 of the present disclosure
  • FIG. 31 is a schematic structural diagram of a candidate channel mapping apparatus that can be applied to a terminal according to Embodiment 13 of the present disclosure.
  • FIG. 32 is a schematic structural diagram of a PDCCH candidate fourth mapping unit according to Embodiment 13 of the present disclosure.
  • FIG. 33 is a more detailed structural diagram of a candidate channel mapping apparatus that can be applied to a base station according to Embodiment 13 of the present disclosure
  • FIG. 34 is a schematic structural diagram of a base station according to Embodiment 14 of the present disclosure.
  • FIG. 35 is a schematic structural diagram of a terminal according to Embodiment 14 of the present disclosure.
  • first, second, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first signal could be termed a second signal, and similarly, a second signal could be termed a first signal without departing from the teachings of the disclosure.
  • Embodiment 1 is a diagrammatic representation of Embodiment 1:
  • FIG. 2 is a schematic flowchart of a candidate channel mapping method on a base station side according to Embodiment 1 of the present disclosure, including:
  • S201 Determine a user-specific search space set of the terminal.
  • the user-specific search space set includes a first set of user-specific search space sets and/or a second set of user-specific search space sets.
  • the first set of user-specific search space sets should contain one or more first user-specific search space sets; the second set of user-specific search space sets should contain one or more second user-specific search spaces. set.
  • a user-specific search space set is a first user-specific search space set or a second user-specific search space set.
  • a user-specific search space set having a number of PDCCH monitoring moments equal to 1 in one slot is determined as a first user-specific search space set; a user-specific search space in which the number of PDCCH monitoring moments in one slot is greater than 1
  • the collection is determined to be a second user-specific search space collection.
  • the number of PDCCH monitoring moments in one slot is equal to 1 or the PDDCH monitoring period is greater than 1 slot.
  • the user-specific search space set is determined as the first user-specific search space set; the PDCCH monitoring time will be in one slot.
  • the number of user-specific search spaces whose number is greater than 1, and whose PDDCH monitoring period is equal to 1 time slot is determined to be the second user-specific search space set.
  • FIG. 3 includes a common search space set (CSS set) and three UE-specific search space sets (USS set).
  • the user-specific search space set USS set 1 includes two PDCCH monitoring moments, that is, occupancy 0 and occasion 1, and the number of PDCCH monitoring moments is greater than 1, so USS set 1 corresponds to the second set of user-specific search space sets 32;
  • the specific search space set USS set 2 and the user-specific search space set USS set 3 only contain one PDCCH monitoring time, that is, occupancy 0, so USS set 2 and USS set 3 correspond to the first set of user-specific search space sets 31. That is, the first set of user-specific search space sets in FIG. 3 includes a user-specific search space set USS set 2 and a user-specific search space set USS set 3, and the second set of user-specific search space sets includes a user-specific search space set USS set 1.
  • the base station configures a common search space set in addition to configuring a user-specific search space set for the terminal.
  • a base station configures a common set of search spaces before configuring a user-specific search space set.
  • all PDCCH candidates in the common search space set are mapped, and PDCCH candidate mappings in all common search space sets are performed before the PDCCH mapping of the user-specific search space set.
  • mapping a PDCCH candidate in a common search space set means that a PDCCH candidate that is finally to be reserved is selected in a common search space set.
  • the PDCCH candidates in one user-specific search space set may include one or more aggregation level PDCCH candidates.
  • USS set 1 in Figure 3 includes two PDCCH candidates with aggregation level 1 (that is, AL is 1) and 4 PDCCHs with aggregation level 2 (that is, AL is 2) at PDCCH monitoring times occasion 0 and occasion1.
  • a PDCCH candidate with an aggregation level of 1 is composed of one control channel unit CCE
  • a PDCCH candidate with an aggregation level of 2 is composed of two CCEs.
  • a PDCCH candidate with an aggregation level of 4 is composed of 4 control channel units CCE.
  • the base station may configure the user-specific search space set for the terminal to have the following actual conditions: First, subject to the actual situation of the base station, the user-specific search space set configured by some base stations for its home terminal belongs to the first set of user-specific. A collection of search spaces, and a particular set of search spaces configured by certain base stations for their belonging terminals belongs to a second set of user-specific search spaces. Second, a base station can configure multiple user-specific search space sets for multiple terminals at the same time. At this time, the base station can configure a first set of user-specific search space sets for some terminals according to configuration requirements, and configure a second set of users for some terminals.
  • a specific search space set for some terminals, a first set of user-specific search space sets and a second set of user-specific search space sets are configured at the same time; third: a plurality of user-specific search space sets configured by the base station for each terminal, including The first set of user-specific search spaces and the second set of user-specific search spaces.
  • the base station configures the user-specific search space set for the terminal, that is, the first set of user-specific search space sets is configured only for the terminal, or the second set of users is configured only for the terminal.
  • S202 Map a PDCCH candidate in a first set of user-specific search space sets using a first selection rule; and map a PDCCH candidate in a second set of user-specific search space sets using a second selection rule.
  • the PDCCH candidate finally mapped in this embodiment is the PDCCH candidate that is finally reserved.
  • the mapped PDCCH candidate may be used to carry downlink control information.
  • the first selection rule includes: when mapping the PDCCH candidate from the first user-specific search space set in the first set of user-specific search space sets, the PDCCH candidates in the first user-specific search space set are all Mapping, or not mapping all PDCCH candidates in the first user-specific search space set.
  • the USS set 2 in FIG. 3 is used to map all the PDCCH candidates in the USS set 2, or all the two PDCCH candidates in the USS set 2 are discarded, that is, they are not mapped.
  • the second selection rule includes: when mapping the PDCCH candidate from the second user-specific search space set in the second set of user-specific search space sets, the PDCCH candidate in the second user-specific search space set is according to Mapping at least one of the ways described:
  • Manner 1 The PDCCH candidates in the second user-specific search space set are mapped according to the order of the PDCCH monitoring time index.
  • the PDCCH candidates in the second user-specific search space set are mapped according to the PDCCH monitoring time index from the largest to the smallest; for example, as shown in FIG. 4, the mapping is sequentially performed according to the PDCCH monitoring time index occasion3-occasion0, in FIG. 1, 2, 3, and 4 are respectively numbers corresponding to the PDCCH candidate set, and the numbers reflect the mapping order, and the mapping is sequentially mapped from low to high by number.
  • the PDCCH candidates in the second user-specific search space set are mapped according to the PDCCH monitoring time index from small to large; for example, as shown in FIG. 5, the mapping is sequentially performed in the order of the PDCCH monitoring time index occasion0-occasion1.
  • 1, 2, 3, and 4 are respectively numbers corresponding to the PDCCH candidate set, and the numbers reflect the mapping order, and the mapping is sequentially mapped from low to high by number.
  • the PDCCH candidates in the second user-specific search space set are mapped according to the order of the PDCCH monitoring time index interleaving. For example, as shown in FIG. 6, the PDCCH monitoring time index occasion0-occasion2-occasion1-occasion3 is sequentially mapped. In FIG. 6, 1, 2, 3, and 4 are respectively numbers corresponding to the PDCCH candidate set, and the number reflects the mapping order. The mapping is mapped from low to high by number.
  • all PDCCH candidates corresponding to one PDCCH monitoring time index may be mapped after mapping all PDCCH candidates corresponding to one PDCCH monitoring time index.
  • one PDCCH monitoring time includes one or more PDCCH time domain symbols, and PDCCH start symbols of different PDCCH monitoring moments are different, and overlapping PDCCH time domain symbols may exist between different PDCCH candidate monitoring moments.
  • the specific implementation is similar to the first method. Specifically, the PDCCH candidates in the second user-specific search space set are mapped according to the PDCCH start symbol index from the largest to the smallest; or the PDCCH candidate in the second user-specific search space set is small according to the PDCCH start symbol index. Large order mapping; or, PDCCH candidates in the second user-specific search space set are mapped according to the order of PDCCH start symbol index interleaving.
  • mapping when mapping is performed according to the order of the PDCCH start symbol index, all PDCCH candidates corresponding to one PDCCH start symbol index may be mapped, and then all PDCCH candidates corresponding to the next PDCCH start symbol index are mapped. .
  • the PDCCH candidates in the second user-specific search space set are mapped according to the aggregation level of the PDCCH candidates from high to low.
  • mapping is performed, all PDCCH candidates corresponding to one aggregation level mapping may be mapped, and then all PDCCH candidates corresponding to the next aggregation level may be mapped.
  • the PDCCH candidate with the AL of 4 is mapped first, the PDCCH candidate with the AL of 2 is mapped, and the PDCCH candidate with the AL of 1 is finally mapped.
  • the PDCCH candidate may also be mapped from the second set of user-specific search spaces in the second set of user-specific search space sets by using the first mode and the third mode.
  • the PDCCH candidates may be mapped in different aggregation levels according to the aggregation level of the PDCCH candidates from high to low.
  • mapping all PDCCH candidates corresponding to one aggregation level mapping are mapped, and then mapped. All PDCCH candidates corresponding to the aggregation level. It should be noted that, in the same aggregation level, according to the PDCCH monitoring time index corresponding to all PDCCH candidates in the aggregation level, the PDCCH monitoring time index is in descending order, or the PDCCH monitoring time index is from small to large.
  • the PDCCH candidate in the aggregation level is mapped in the order of the PDCCH monitoring time index interleaving.
  • all PDCCH candidate mappings of the aggregation level corresponding to one PDCCH monitoring time index are mapped.
  • all the PDCCH candidates of the aggregation level corresponding to the next PDCCH monitoring time index are mapped.
  • the PDCCH candidate in the second user-specific search space set has two AL levels, namely AL2 and AL1, and then maps AL2 and then maps AL1.
  • the PDCCH monitoring time index is mapped in the order of small to large
  • the PDCCH candidate of the level AL1 the PDCCH monitoring time index is mapped from small to large
  • FIG. 1-8 is a number corresponding to the PDCCH candidate set, and the number reflects the mapping order, and the mapping is sequentially selected from low to high by number.
  • the PDCCH candidate in the second user-specific search space set has two AL levels, namely AL2 and AL1, and then maps AL2 and then maps AL1.
  • the mapping is performed according to the order of the PDCCH monitoring time index interleaving.
  • the mapping is performed according to the order of the PDCCH monitoring time index interleaving.
  • 1-8 respectively correspond.
  • the number of the PDCCH candidate set. This number reflects the mapping order. When mapping, the number is selected from low to high.
  • mode 2 and mode 3 may also be used to map PDCCH candidates from the second set of user-specific search spaces in the second set of user-specific search space sets.
  • the mapping of PDCCH candidates from the second set of user-specific search spaces in the second set of user-specific search space sets is similar to that of the first mode and the third mode, and may be different according to the aggregation level of the PDCCH candidates from high to low.
  • mapping PDCCH candidates in the aggregation level mapping all PDCCH candidates corresponding to one aggregation level mapping after mapping, and then mapping all PDCCH candidates corresponding to the next aggregation level; and in the same aggregation level, according to the aggregation level PDCCH start symbol index corresponding to all PDCCH candidates, in descending order of PDCCH start symbol index, or in descending order of PDCCH start symbol index, or in order of PDCCH start symbol index interleaving a PDCCH candidate in the aggregation level; after mapping the PDCCH candidates of the same aggregation level, mapping all PDCCH candidates of the aggregation level corresponding to one PDCCH start symbol index, and mapping the next PDCCH start symbol index All PDCCH candidates for this aggregation level.
  • the second selection rule may further be: dividing the PDCCH candidate in the second user-specific search space set into the first set of PDCCH candidates and the second set of PDCCH candidates, and then using the third selection rule in the first set.
  • the PDCCH candidate is mapped in the PDCCH candidate; the PDCCH candidate is mapped in the second set of PDCCH candidates using the fourth selection rule.
  • the first set of PDCCH candidates and the second set of PDCCH candidates in the second user-specific search space set may be divided in the following manner:
  • the first set of PDCCH candidates can be selected in the following manner:
  • the first set of PDCCH candidates may be selected from PDCCH candidates in the second user-specific search space set according to the PDCCH monitoring time index order.
  • PDCCH candidates may be configured to form a first set of PDCCH candidates from among PDCCH candidates in the second user-specific search space set corresponding to the PDCCH monitoring time index. For example, as shown in FIG. 10, one PDCCH candidate is selected in the occupancy0-occasion3, that is, four independent PDCCH candidates in FIG. 10 (four PDCCH candidates numbered 1-4), and the four PDCCHs are selected. That is, the first set of PDCCH candidates. It should be understood that the aggregation level corresponding to the PDCCH candidate selected in the occupancy0-occasion3 at this time is not required, and may be any aggregation level.
  • the first set of PDCCH candidates may be selected from PDCCH candidates in the second user-specific search space set according to the PDCCH monitoring time index and the aggregation level of the PDCCH candidate.
  • the PDCCH candidates in the second user-specific search space set corresponding to the PDCCH monitoring time index may select n (n is greater than or equal to 1) PDCCH candidates with the highest aggregation level to form a first set of PDCCH candidates.
  • n is greater than or equal to 1
  • PDCCH candidates with the highest aggregation level For example, as shown in FIG. 10, the corresponding maximum aggregation level in the occupancy0-occasion3 is AL2, and an PDCCH candidate of the AL2 level is selected in the occupancy0-occasion3, that is, the independent0-occasion3 in FIG.
  • Four PDCCHs of the AL2 level four PDCCH candidates numbered 1-4), then the four PDCCHs are the first set of PDCCH candidates.
  • the first set of PDCCH candidates may be selected from PDCCH candidates in the second set of user-specific search spaces according to a PDCCH start symbol index.
  • the PDCCH candidate in the second user-specific search space set corresponding to the PDCCH start symbol index may be selected as n (n is greater than or equal to 1) PDCCH candidates to form a first set of PDCCH candidates.
  • n is greater than or equal to 1
  • the aggregation level corresponding to the PDCCH candidate selected in the PDCCH candidate corresponding to each PDCCH start symbol index is not required, and may be any aggregation level.
  • the first set of PDCCH candidates may be selected from PDCCH candidates in the second set of user-specific search spaces according to a PDCCH start symbol index and an aggregation level of PDCCH candidates.
  • the PDCCH candidate in the second user-specific search space set corresponding to the PDCCH start symbol index is selected from the PDCCH candidates in the second user-specific search space set, and n (n is greater than or equal to 1) PDCCH candidates with the highest aggregation level are configured to form the first.
  • n is greater than or equal to 1
  • PDCCH candidates with the highest aggregation level are configured to form the first.
  • n may take 1 or 2.
  • the remaining PDCCH candidates except the first set of PDCCH candidates in the second user-specific search space set may be used as the second set of PDCCH candidates.
  • all PDCCHs except for the four PDCCHs in the first set of PDCCH candidates constitute a second set of PDCCH candidates.
  • the third selection rule includes: the first set of PDCCH candidates are selected according to at least one of the following manners:
  • Manner 4 The first set of PDCCH candidates are mapped according to the order of the PDCCH monitoring time index.
  • the first set of PDCCH candidates may be based on PDCCH candidates in which the PDCCH monitoring time index is indexed in descending order.
  • the first set of PDCCH candidates are PDCCH candidates mapped in order from small to large according to the PDCCH monitoring time index.
  • the first set of PDCCH candidates are mapped according to the PDCCH candidate in the order of the PDCCH monitoring time index interleaving. It should be understood that, when mapping is performed, all PDCCH candidates in the first set of PDCCH candidates corresponding to one PDCCH monitoring time index may be mapped, and then mapped in the first set of PDCCH candidates corresponding to the next PDCCH monitoring time index. All PDCCH candidates.
  • the first set of PDCCH candidates are PDCCH candidates mapped from the first set of PDCCH candidates according to the order of PDCCH monitoring time index interleaving, and the interlaced occasion order is occasion0-occasion2-occasion1-occasion3.
  • 1-4 are respectively the numbers corresponding to the PDCCH candidates, and the numbers reflect the mapping order, and the mapping is sequentially mapped from low to high by number.
  • Manner 5 The first set of PDCCH candidates are mapped according to the order of the PDCCH start symbol index.
  • the first set of PDCCH candidates are mapped according to the PDCCH start symbol index in descending order of the PDCCH candidate; or the first set of PDCCH candidates are mapped according to the PDCCH start symbol index from small to large. PDCCH candidate; or a PDCCH candidate in which the first set of PDCCH candidates are mapped according to the order in which the PDCCH start symbol index is interleaved. It should be understood that, after mapping, all the PDCCH candidates in the first set of PDCCH candidates corresponding to one PDCCH start symbol index may be mapped, and then the first set of PDCCH candidates corresponding to the next PDCCH start symbol index may be mapped. All PDCCH candidates in .
  • Manner 6 The first set of PDCCH candidates are mapped according to the order of aggregation levels of PDCCH candidates.
  • the first set of PDCCH candidates are mapped according to the PDCCH candidates in the order of the aggregation level of the PDCCH candidates.
  • the mapping is performed, all the PDCCH candidates in the first set of PDCCH candidates corresponding to one aggregation level mapping may be mapped.
  • all PDCCH candidates in the first set of PDCCH candidates corresponding to the next aggregation level are mapped.
  • the selection manner of the first set of PDCCH candidates is similar to the selection mode shown in FIG. 7.
  • the first set of PDCCH candidates includes a PDCCH candidate with an AL of 4, a PDCCH candidate with an AL of 2, and a PDCCH candidate with an AL of 1.
  • the mapping sequence is to first select a PDCCH candidate mapping in which the AL is 4 in the first set of PDCCH candidates. Then, the PDCCH candidate mapping in which the AL is 2 in the first set of PDCCH candidates is selected, and the PDCCH candidate mapping in which the AL is 1 in the first set of PDCCH candidates is selected.
  • the first set of PDCCH candidates are mapped according to the PDCCH candidates in the order of the aggregation level of the PDCCH candidates from high to low and the PDCCH monitoring time index interleaving.
  • all PDCCH candidates in the first set of PDCCH candidates corresponding to one aggregation level mapping may be mapped, and then all PDCCH candidates in the first set of PDCCH candidates corresponding to the next aggregation level may be mapped; at the same aggregation level.
  • all the PDCCH candidates in the first set of PDCCH candidates corresponding to the PDCCH monitoring time index are mapped, and then the aggregation level corresponding to the next PDCCH monitoring time index is mapped.
  • the selection manner of the first set of PDCCH candidates is similar to the selection mode shown in FIG. 8.
  • the first set of PDCCH candidates is: a PDCCH candidate with an AL of 4 corresponding to occasion0, a PDCCH candidate with an AL of 2 corresponding to occasion1, a PDCCH candidate with an AL of 4 corresponding to occasion2, and a PDCCH with an AL of 4 corresponding to occasion3.
  • the first set of PDCCH candidates is: a PDCCH candidate with an AL of 4 corresponding to occasion0, a PDCCH candidate with an AL of 2 corresponding to occasion1, a PDCCH candidate with an AL of 4 corresponding to occasion2, and a PDCCH with an AL of 4 corresponding to occasion3.
  • the mapping sequence is: first, select a PDCCH candidate mapping corresponding to occasion0 in the first set of PDCCH candidates to be 4, and then select a PDCCH candidate mapping corresponding to occasion2 in the first set of PDCCH candidates to be 4, and then select the first A PDCCH candidate mapping corresponding to occasion3 of the PDCCH candidate is 4, and finally a PDCCH candidate mapping corresponding to occasion1 of the first set of PDCCH candidates is 2.
  • the first set of PDCCH candidates may also be mapped according to the order of aggregation of the PDCCH candidates from high to low and the PDCCH candidates whose PDCCH monitoring time index is indexed from large to small.
  • the first set of PDCCH candidates is: a PDCCH candidate with an AL of 2 corresponding to occasion0, a PDCCH candidate with an AL of 4 corresponding to occasion1, a PDCCH candidate with an AL of 4 corresponding to occasion2, and a PDCCH with an AL of 2 corresponding to occasion3.
  • the mapping sequence is: first select a PDCCH candidate mapping corresponding to the occasion 2 of the first set of PDCCH candidates to be 4, and then select a PDCCH candidate mapping corresponding to the occasion1 of the first set of PDCCH candidates to be 4, and then select the first A PDCCH candidate mapping corresponding to occasion 3 of the PDCCH candidate is 2, and finally a PDCCH candidate mapping corresponding to occasion 0 of the first set of PDCCH candidates is 2.
  • the first set of PDCCH candidates is: a PDCCH candidate with an AL of 2 corresponding to occasion0, a PDCCH candidate with an AL of 4 corresponding to occasion1, a PDCCH candidate with an AL of 4 corresponding to occasion2, and a PDCCH with an AL of 2 corresponding to occasion3.
  • the mapping sequence is: first, select a PDCCH candidate mapping corresponding to occasion1 in the first set of PDCCH candidates to be 4, and then select a PDCCH candidate mapping corresponding to occasion2 in the first set of PDCCH candidates to be 4, and then select the first A PDCCH candidate mapping corresponding to occasion0 of the PDCCH candidate is 2, and finally a PDCCH candidate mapping corresponding to occasion3 of the first set of PDCCH candidates is 2.
  • the first set of PDCCH candidates may be selected in preference to the second set of PDCCH candidates. That is, the PDCCH candidate mapped in the second set of PDCCH candidates after the PDCCH candidates mapped in the first set of PDCCH candidates.
  • the fourth selection rule includes: the second set of PDCCH candidates are selected according to at least one of the following manners:
  • Mode 7 The second set of PDCCH candidates are all mapped.
  • the second set of PDCCH candidates is 28 PDCCH candidates corresponding to number 5.
  • the 28 PDCCH candidates are selected, all of the 28 PDCCH candidates corresponding to the number 5 may be selected to be mapped, or all of the 28 PDCCH candidates corresponding to the number 5 may be discarded.
  • Mode 8 The second set of PDCCH candidates are mapped according to the order of the PDCCH monitoring time index.
  • the second set of PDCCH candidates are PDCCH candidates mapped in descending order according to the PDCCH monitoring time index; or the second set of PDCCH candidates are mapped according to the PDCCH monitoring time index from small to large PDCCH candidates; or, The two sets of PDCCH candidates are mapped to the PDCCH candidates in the order of the PDCCH monitoring time index interleaving.
  • all PDCCH candidates in the second set of PDCCH candidates corresponding to one PDCCH monitoring time index may be mapped, and then all PDCCH candidates in the second set of PDCCH candidates corresponding to the next PDCCH monitoring time index may be mapped. .
  • the order mapping may be performed only according to the PDCCH monitoring time index interleaving.
  • the interlaced occasion index order is occasion0-occasion2- Occasion1-occasion3.
  • 5-8 are respectively numbers corresponding to the PDCCH candidate set, and the numbers reflect the mapping order, and the mapping is sequentially mapped from low to high by number.
  • the second set of PDCCH candidates may also be mapped according to the PDCCH candidates in the order of aggregation level of the PDCCH candidates from high to low and PDCCH monitoring time index interleaving.
  • the interleaved occasion index order is occasion0-occasion2-occasion1-occasion3.
  • mapping all the PDCCH candidates in the second set of PDCCH candidates of the aggregation level corresponding to one PDCCH monitoring time index, and mapping the aggregation level corresponding to the next PDCCH monitoring time index All PDCCH candidates in the second set of PDCCH candidates.
  • 5-11 are respectively numbers corresponding to the PDCCH candidate set, and the numbers reflect the mapping order, and the mapping is sequentially mapped from low to high by number.
  • mapping is performed according to a preset mapping order on each carrier in a current time slot according to each user-specific search space set.
  • the base station first maps the second user-specific search space set USS set 3 of the second set of user-specific search space sets on the carrier CC1, and then searches for the first set of users on the carrier CC1.
  • the first user-specific search space set USS set 4 of the spatial set is mapped, and then the second user-specific search space set USS set 3 of the second set of user-specific search space sets on the carrier CC2 is mapped, and then on the carrier CC2.
  • the first set of user-specific search space sets of the first set of user-specific search spaces is mapped by USS set 4.
  • the base station should know in advance the processing threshold of the terminal for the number of PDCCH candidate monitoring, and know the processing threshold of the terminal for the CCE.
  • the mapping process it is ensured that the number of PDCCH candidate monitoring times corresponding to the total PDCCH candidate of the mapping is less than or equal to the processing threshold of the PDCCH candidate monitoring times of the terminal, and the number of CCEs corresponding to the mapped total PDCCH candidate is less than or equal to the CCE processing of the terminal. Threshold.
  • the total PDCCH candidate of the foregoing mapping includes the PDCCH candidate mapped in the user-specific search space set and the PDCCH candidate mapped in the common search space set.
  • the monitoring times of the terminal for one PDCCH candidate are usually fixed.
  • one PDCCH candidate for one user-specific search space set is usually twice. Based on this, the number of mapped PDCCH candidates of the base station maximum can be determined by the processing threshold of the PDCCH candidate monitoring number.
  • the base station knows that the processing threshold of the terminal for the number of PDCCH candidate monitoring times is 2 m, for example, setting a common search space set
  • the number of PDCCH candidates mapped in the user-specific search space set configured by the base station is m-m1, which is set to 20.
  • the first user-specific search space set USS set 4 of the first set of user-specific search space sets on the carrier CC1 is mapped.
  • the total number of PDCCH candidates on the USS set 4 is 8, which is greater than 4 (20-16). Then, all PDCCH candidates on USS set 4 are discarded according to the first selection rule.
  • the second user-specific search space set USS set 3 of the second set of user-specific search space sets on the carrier CC2 is then mapped.
  • the second selection rule is to select the PDCCH candidates corresponding to the AL2 level of the USS set 3 on the carrier CC2, which is exactly four, which is exactly equal to the remaining processing capability of the terminal for the PDCCH candidate.
  • the value is (20-16). Therefore, the PDCCH candidates corresponding to the AL2 level of the USS set 3 on the carrier CC2 are mapped, and all PDCCH candidates corresponding to the AL1 level of the USS set 3 on the carrier CC2 are discarded. Thereafter, the first user-specific search space set USS set 4 of the first set of user-specific search space sets on carrier CC2 is also discarded.
  • the PDCCH candidates whose number of CCEs of the mapped PDCCH candidate does not exceed the CCE processing threshold of the terminal may be controlled. .
  • the processing threshold value and the CCE processing threshold value for the PDCCH candidate monitoring times are fixed, so the engineer can write the base station in advance.
  • the terminal may actively inform the base station of the current processing threshold of the PDCCH candidate monitoring times and the CCE processing threshold through the communication connection. value.
  • the base station selects one or more PDCCH candidates on the mapped PDCCH candidate, and sends the downlink control information to the terminal as the PDCCH channel carrying the downlink control information.
  • FIG. 15 is a schematic flowchart of a candidate channel mapping method on the terminal side according to Embodiment 1 of the present disclosure, including:
  • S1501 Determine a user-specific search space collection.
  • the user-specific search space set includes a first set of user-specific search space sets and/or a second set of user-specific search space sets.
  • a user-specific search space set having a number of PDCCH monitoring moments equal to 1 in one slot is determined as a first user-specific search space set; a user-specific search space in which the number of PDCCH monitoring moments in one slot is greater than 1
  • the collection is determined to be a second user-specific search space collection.
  • the number of PDCCH monitoring moments in one slot is equal to 1 or the PDDCH monitoring period is greater than 1 slot.
  • the user-specific search space set is determined as the first user-specific search space set; the PDCCH monitoring time will be in one slot.
  • the number of user-specific search spaces whose number is greater than 1, and whose PDDCH monitoring period is equal to 1 time slot is determined to be the second user-specific search space set.
  • the base station configures a common search space set in addition to configuring a user-specific search space set for the terminal. Therefore, when the terminal monitors the PDCCH, in addition to monitoring the PDCCH candidates in the user-specific search space set, the PDCCH candidates are also monitored in the common search space set. Generally, the terminal first maps all PDCCH candidates in the common search space set, and then maps out the PDCCH candidates of the user-specific search space set.
  • the user-specific search space set configured by the base station for the terminal has three situations, that is, only the first set of user-specific search space sets respectively; or only the second set of user-specific search space sets; or, the first set of users A specific set of search spaces and a second set of user-specific search spaces.
  • mapping PDCCH candidates in a common search space set means that a PDCCH candidate that is finally to be reserved is selected in a common search space set.
  • S1502 Map the PDCCH candidate in the first set of user-specific search space sets using the first selection rule; and map the PDCCH candidates in the second set of user-specific search space sets using the second selection rule.
  • the first selection rule and the second selection rule adopted by the terminal are the same as the first selection rule and the second selection rule adopted by the base station. Therefore corresponding to the base station side:
  • the first selection rule includes: mapping all PDCCH candidates in the first user-specific search space set, or not mapping all PDCCH candidates in the first user-specific search space set.
  • the second selection rule includes: the PDCCH candidate in the second user-specific search space set is mapped according to at least one of the following manners:
  • Manner 1 The PDCCH candidates in the second user-specific search space set are mapped according to the order of the PDCCH monitoring time index.
  • the PDCCH candidate in the second user-specific search space set selects the PDCCH candidate mapping according to the PDCCH monitoring time index from the largest to the smallest.
  • the PDCCH candidates in the second user-specific search space set select the PDCCH candidate mapping according to the PDCCH monitoring time index from small to large.
  • the PDCCH candidates in the second user-specific search space set select the PDCCH candidate mapping according to the order of the PDCCH monitoring time index interleaving.
  • all PDCCH candidates corresponding to one PDCCH monitoring time index may be mapped after mapping all PDCCH candidates corresponding to one PDCCH monitoring time index.
  • one PDCCH monitoring time includes one or more PDCCH time domain symbols, and PDCCH start symbols of different PDCCH monitoring moments are different, and overlapping PDCCH time domain symbols may exist between different PDCCH candidate monitoring moments.
  • the specific implementation is similar to the first method. Specifically, the PDCCH candidate in the second user-specific search space set selects the PDCCH candidate mapping according to the PDCCH start symbol index from the largest to the smallest; or the PDCCH candidate in the second user-specific search space set is based on the PDCCH start symbol index.
  • the PDCCH candidate mapping is selected in a small to large order; or, the PDCCH candidates in the second user-specific search space set select the PDCCH candidate mapping according to the order of the PDCCH start symbol index interleaving.
  • mapping when mapping is performed according to the order of the PDCCH start symbol index, all PDCCH candidates corresponding to one PDCCH start symbol index may be mapped, and then all PDCCH candidates corresponding to the next PDCCH start symbol index are mapped. .
  • the PDCCH candidate in the second user-specific search space set selects the PDCCH candidate mapping according to the aggregation level of the PDCCH candidate from high to low.
  • mapping is performed, all PDCCH candidates corresponding to one aggregation level mapping may be mapped, and then all PDCCH candidates corresponding to the next aggregation level may be mapped.
  • the PDCCH candidate may be mapped from the second set of user-specific search spaces in the second set of user-specific search space sets by using the first mode and the third mode.
  • the aggregation level of the PDCCH candidate may be high.
  • the PDCCH candidates are mapped in different aggregation levels in turn; after mapping, all PDCCH candidates corresponding to one aggregation level mapping are mapped, and then all PDCCH candidates corresponding to the next aggregation level are mapped.
  • the PDCCH monitoring time index is in descending order, or the PDCCH monitoring time index is from small to large.
  • the PDCCH candidate in the aggregation level is mapped in the order of the PDCCH monitoring time index interleaving.
  • all PDCCH candidate mappings of the aggregation level corresponding to one PDCCH monitoring time index are mapped.
  • all the PDCCH candidates of the aggregation level corresponding to the next PDCCH monitoring time index are mapped.
  • mode 2 and mode 3 may also be used to map PDCCH candidates from the second set of user-specific search spaces in the second set of user-specific search space sets. Similar to the manner in which the PDCCH candidate mapping is mapped from the second user-specific search space set in the second set of user-specific search space sets, and the aggregation level of the PDCCH candidates may be sequentially in the order of high to low.
  • the second selection rule may further be: dividing the PDCCH candidate in the second user-specific search space set into the first set of PDCCH candidates and the second set of PDCCH candidates, and then using the third selection rule in the first set.
  • the PDCCH candidate is mapped in the PDCCH candidate; the PDCCH candidate is mapped in the second set of PDCCH candidates using the fourth selection rule.
  • the first set of PDCCH candidates and the second set of PDCCH candidates in the second user-specific search space set may be divided in the following manner:
  • the first set of PDCCH candidates can be selected in the following manner:
  • the first set of PDCCH candidates may be selected from PDCCH candidates in the second user-specific search space set according to the PDCCH monitoring time index order.
  • PDCCH candidates may be configured to form a first set of PDCCH candidates from among PDCCH candidates in the second user-specific search space set corresponding to the PDCCH monitoring time index.
  • the first set of PDCCH candidates may be selected from PDCCH candidates in the second user-specific search space set according to the PDCCH monitoring time index and the aggregation level of the PDCCH candidate.
  • the PDCCH candidates in the second user-specific search space set corresponding to the PDCCH monitoring time index may select n (n is greater than or equal to 1) PDCCH candidates with the highest aggregation level to form a first set of PDCCH candidates.
  • the first set of PDCCH candidates may be selected from PDCCH candidates in the second set of user-specific search spaces according to a PDCCH start symbol index.
  • the PDCCH candidate in the second user-specific search space set corresponding to the PDCCH start symbol index may be selected as n (n is greater than or equal to 1) PDCCH candidates to form a first set of PDCCH candidates.
  • n is greater than or equal to 1
  • the aggregation level corresponding to the PDCCH candidate selected in the PDCCH candidate corresponding to each PDCCH start symbol index is not required, and may be any aggregation level.
  • the first set of PDCCH candidates may be selected from PDCCH candidates in the second set of user-specific search spaces according to a PDCCH start symbol index and an aggregation level of PDCCH candidates.
  • the PDCCH candidate in the second user-specific search space set corresponding to the PDCCH start symbol index is selected from the PDCCH candidates in the second user-specific search space set, and n (n is greater than or equal to 1) PDCCH candidates with the highest aggregation level are configured to form the first.
  • n is greater than or equal to 1
  • PDCCH candidates with the highest aggregation level are configured to form the first.
  • n may take 1 or 2.
  • the remaining PDCCH candidates except the first set of PDCCH candidates in the second user-specific search space set may be used as the second set of PDCCH candidates.
  • all PDCCHs except for the four PDCCHs in the first set of PDCCH candidates constitute a second set of PDCCH candidates.
  • the third selection rule includes: the first set of PDCCH candidates are selected according to at least one of the following manners:
  • Manner 4 The first set of PDCCH candidates are mapped according to the order of the PDCCH monitoring time index.
  • the first set of PDCCH candidates may map the PDCCH candidates according to the PDCCH monitoring time index from the largest to the smallest.
  • the first set of PDCCH candidates maps PDCCH candidates according to a PDCCH monitoring time index from small to large.
  • the first set of PDCCH candidates maps PDCCH candidates according to an order of PDCCH monitoring time index interleaving. It should be understood that, when mapping is performed, all PDCCH candidates in the first set of PDCCH candidates corresponding to one PDCCH monitoring time index may be mapped, and then mapped in the first set of PDCCH candidates corresponding to the next PDCCH monitoring time index. All PDCCH candidates.
  • Manner 5 The first set of PDCCH candidates are mapped according to the order of the PDCCH start symbol index.
  • the first set of PDCCH candidates maps the PDCCH candidates according to the PDCCH start symbol index from the largest to the smallest; or the first set of PDCCH candidates maps the PDCCH according to the PDCCH start symbol index from small to large. Candidates; or, the first set of PDCCH candidates map PDCCH candidates according to an order of PDCCH start symbol index interleaving. It should be understood that, after mapping, all the PDCCH candidates in the first set of PDCCH candidates corresponding to one PDCCH start symbol index may be mapped, and then the first set of PDCCH candidates corresponding to the next PDCCH start symbol index may be mapped. All PDCCH candidates in .
  • Manner 6 The first set of PDCCH candidates are mapped according to the order of aggregation levels of PDCCH candidates.
  • the first set of PDCCH candidates may be mapped to the PDCCH candidates according to the aggregation level of the PDCCH candidates.
  • the mapping is performed, all the PDCCH candidates in the first set of PDCCH candidates corresponding to one aggregation level mapping may be mapped. And mapping all PDCCH candidates in the first set of PDCCH candidates corresponding to the next aggregation level.
  • the first set of PDCCH candidates maps PDCCH candidates according to an order of aggregation of PDCCH candidates from high to low and PDCCH monitoring time index interleaving. After performing mapping, all PDCCH candidates in the first set of PDCCH candidates corresponding to one aggregation level mapping may be mapped, and then all PDCCH candidates in the first set of PDCCH candidates corresponding to the next aggregation level may be mapped; at the same aggregation level. After the first set of PDCCH candidates are mapped, all the PDCCH candidates in the first set of PDCCH candidates corresponding to the PDCCH monitoring time index are mapped, and then the aggregation level corresponding to the next PDCCH monitoring time index is mapped. All PDCCH candidates in the first set of PDCCH candidates.
  • the first set of PDCCH candidates may also map PDCCH candidates according to the order of aggregation of PDCCH candidates from high to low and the order of PDCCH monitoring time indices from large to small. Or mapping the PDCCH candidates in descending order according to the aggregation level of the PDCCH candidates from high to low and the PDCCH monitoring time index.
  • the first set of PDCCH candidates may be selected in preference to the second set of PDCCH candidates. That is, after mapping the PDCCH candidates in the first set of PDCCH candidates, the PDCCH candidates are mapped in the second set of PDCCH candidates.
  • the fourth selection rule includes: the second set of PDCCH candidates are selected according to at least one of the following manners:
  • Manner 7 The second set of PDCCH candidates are all selected as mapped PDCCH candidates.
  • Manner 8 The second set of PDCCH candidates map the PDCCH candidates according to the order of the PDCCH monitoring time index.
  • the second set of PDCCH candidates maps the PDCCH candidates according to the PDCCH monitoring time index from the largest to the smallest; or the second set of PDCCH candidates maps the PDCCH candidates according to the PDCCH monitoring time index from small to large; or, the second set The PDCCH candidate maps PDCCH candidates according to the order of PDCCH monitoring time index interleaving.
  • all PDCCH candidates in the second set of PDCCH candidates corresponding to one PDCCH monitoring time index may be mapped, and then all PDCCH candidates in the second set of PDCCH candidates corresponding to the next PDCCH monitoring time index may be mapped.
  • the PDCCH candidates When the PDCCH candidates are mapped in the order of the PDCCH monitoring time index interleaving, the PDCCH candidates may be mapped only in the order of the PDCCH monitoring time index interleaving.
  • mapping the PDCCH candidates in the user-specific search space set in this embodiment is performed according to a preset mapping order on each carrier in the current time slot according to each user-specific search space set.
  • the PDCCH candidate mapped by the terminal should ensure that the PDCCH candidate monitoring number corresponding to the mapped total PDCCH candidate is less than or equal to the processing threshold of the PDCCH candidate monitoring number of the terminal, and the number of CCEs corresponding to the mapped total PDCCH candidate. Less than or equal to the CCE processing threshold of the terminal.
  • the total PDCCH candidate of the foregoing mapping includes the PDCCH candidate mapped in the user-specific search space set and the PDCCH candidate mapped in the common search space set.
  • a candidate channel mapping method by configuring a terminal-specific user-search space set including a first set of user-specific search space sets and/or a second set of user-specific search space sets, and then using the first selection rule
  • the PDCCH candidates are mapped in the first set of user-specific search space sets, and the PDCCH candidates are mapped in the second set of user-specific search space sets by using the second selection rule, so as to filter the PDCCH candidates.
  • the processing threshold value and the CCE processing threshold value of the PDCCH candidate monitoring times of the terminal are combined in the screening process, so that the PDCCH candidate that is finally reserved in one time slot is within the capability range supported by the UE when the terminal processes the terminal.
  • Embodiment 2 is a diagrammatic representation of Embodiment 1:
  • FIG. 16 is a schematic flowchart of a candidate channel mapping method on a base station side according to Embodiment 2 of the present disclosure, including:
  • S1601 Determine a third set of user-specific search spaces of the terminal.
  • the third set of user-specific search space sets includes one or more third user-specific search space sets.
  • One or more third user-specific search space sets in the third set of user-specific search space sets include all PDCCH candidates on one time slot.
  • the terminal only monitors the PDCCH candidate in the user-specific search space set on the initial activated downlink bandwidth part and the activated downlink bandwidth part. Therefore, the third set of user-specific search space set in this embodiment may include: All user-specific search space sets of the downlink bandwidth portion and/or the terminal on the initial active downlink bandwidth portion are activated on the time slot.
  • S1602 Map the PDCCH candidate in the third set of user-specific search space sets according to the carrier index and the search space set index.
  • mapping the PDCCH candidates in the third set of user-specific search space sets according to the carrier index and the search space set index includes: sequentially selecting a third set of user-specific searches on each carrier according to a carrier index from low to high. PDCCH candidate mapping in a set of spaces. On the same carrier, the PDCCH candidate mappings in the third user-specific search space set are sequentially sequenced according to the search space set index from low to high. For example, as shown in FIG. 13, the user-specific search space sets USS set 3 and USS set 4 on the carrier CC1 are first mapped, and then the user-specific search space sets USS set 3 and USS set 4 on the carrier CC2 are mapped.
  • mapping the user-specific search space sets USS set 3 and USS set 4 on the carrier CC1 When mapping the user-specific search space sets USS set 3 and USS set 4 on the carrier CC1, the user-specific search space set USS set 3 on the carrier CC1 is first mapped, and then the user-specific search space set on the carrier CC1 is mapped. USS set 4 is mapped.
  • mapping the user-specific search space sets USS set 3 and USS set 4 on the carrier CC2 the user-specific search space set USS set 3 on the carrier CC2 is first mapped, and then the user-specific search space set on the carrier CC2 is mapped. USS set 4 is mapped.
  • mapping the PDCCH candidates in the third set of user-specific search space sets according to the carrier index and the search space set index in the current time slot includes: sequentially, in order from low to high, the carrier index is alternately The PDCCH candidate mapping in the third set of user-specific search space sets on the carrier; on the same carrier, the PDCCH candidate mappings in the third user-specific search space set are sequentially mapped according to the search space set index from low to high. For example, as shown in FIG. 17, the user-specific search space set USS set 3 on the carrier CC1 is mapped first, then the user-specific search space set USS set 3 on the carrier CC2 is mapped, and then the user-specific search on the carrier CC1 is performed. The space set USSset 4 is mapped, and then the user-specific search space set USS set 4 on the carrier CC2 is mapped.
  • the search space set maps the PDCCH candidates in the third user-specific search space set in order according to the carrier index from low to high.
  • the order may be: according to the search space set index from low to high, one to After the third user-specific search space set corresponding to the search space set index maps all the PDCCH candidates that need to be mapped, the PDCCH candidate is mapped to the third user-specific search space set corresponding to one search space set index.
  • mapping the PDCCH candidate in the third set of user-specific search space sets according to the carrier index and the search space set index includes at least one of the following manners:
  • Manner 9 Mapping PDCCH candidates in a third set of user-specific search space sets directly according to a carrier index and a search space set index.
  • the manner shown in FIG. 13 and FIG. 17 is to map PDCCH candidates in a third set of user-specific search space sets directly according to the carrier index and the search space set index.
  • Manner 10 mapping PDCCH candidates in the third set of user-specific search space sets according to a carrier index, a search space set index, and a slot index.
  • the period is set according to the slot index and the mapping sequence of each third user-specific search space set in each of the third set of user-specific search space sets on each carrier, and the time slot corresponding to the slot index is determined on each carrier.
  • Setting a rule in the mapping order of each third user-specific search space set in the third set of user-specific search space sets; and then setting rules according to the carrier index and the mapping order, and sequentially PDCCH in the third set of user-specific search space sets on the carrier The candidate mapped PDCCH candidate; the PDCCH candidate mapped to the PDCCH candidate in each third user-specific search space set in the order of the search space set index from low to high on the same carrier.
  • the mapping order setting rules of each third user-specific search space set in the third set of user-specific search space sets on each carrier are periodic, and the period is 4 time slots. Then, according to the slot index n divided by the period 4, the position of the slot index n in one cycle can be obtained by the remainder, for example, the remainder is 1 and corresponds to the first slot in one cycle.
  • the mapping sequence in the time slot is the same as that in FIG. 13, that is, according to the carrier index and the search space set index, the user-specific search space sets USS set 3 and USS set 4 on the carrier CC1 are first mapped, and then on the carrier CC2. The user-specific search space set USS set 3 and USS set 4 are mapped.
  • mapping the user-specific search space sets USS set 3 and USS set 4 on the carrier CC1 When mapping the user-specific search space sets USS set 3 and USS set 4 on the carrier CC1, the user-specific search space set USS set 3 on the carrier CC1 is first mapped, and then the user-specific search space set on the carrier CC1 is mapped. USS set 4 is mapped.
  • mapping the user-specific search space sets USS set 3 and USS set 4 on the carrier CC2 the user-specific search space set USS set 3 on the carrier CC2 is first mapped, and then the user-specific search space set on the carrier CC2 is mapped. USS set 4 is mapped.
  • Mode 11 mapping PDCCH candidates in a third set of user-specific search space sets according to a carrier index, a search space set index, and a carrier type.
  • the carrier type includes a primary cell carrier and a secondary cell carrier.
  • the method includes: after the PDCCH candidate mapped by the PDCCH candidate in the third set of user-specific search space sets on the primary cell carrier, according to the PDCCH candidate Having a carrier index from low to high, sequentially PDCCH candidates mapped to PDCCH candidates in a third set of user-specific search space sets on each secondary cell carrier; on the same carrier, according to a search space set index from low to high, PDCCH candidates mapped to PDCCH candidates in each third user-specific search space set in sequence.
  • the third user-specific search space set when mapping the third user-specific search space set in the third set of user-specific search space sets on each carrier, the third user-specific search space set may be first followed.
  • the space set is selected according to the first selection rule in the first embodiment
  • the third user-specific search space set in the second user-specific search space set is selected according to the second selection rule in the first embodiment.
  • the base station should know in advance the processing threshold of the terminal for the number of PDCCH candidate monitoring times, and the processing threshold for the CCE. In the actual selection process, it is ensured that the number of PDCCH candidate monitoring times corresponding to the total PDCCH candidate of the mapping is less than or equal to the processing threshold of the PDCCH candidate monitoring times of the terminal, and the number of CCEs corresponding to the mapped total PDCCH candidate is less than or equal to the CCE of the terminal. Handle the threshold. It should be understood that the total PDCCH candidate of the foregoing mapping includes the PDCCH candidate mapped in the user-specific search space set and the PDCCH candidate mapped in the common search space set.
  • the base station selects the mapped PDCCH candidate, the base station selects one or more PDCCH candidates on the mapped PDCCH candidate, and sends the downlink control information to the terminal as the PDCCH channel carrying the downlink control information.
  • FIG. 19 is a schematic flowchart of a candidate channel mapping method on the terminal side according to Embodiment 2 of the present disclosure, including:
  • S1901 Determine a third set of user-specific search space sets.
  • the third set of user-specific search space sets includes one or more third user-specific search space sets; and the third set of user-specific search space sets includes one or more third user-specific search space sets. All PDCCH candidates on one slot are included.
  • the third set of user-specific search space sets in this embodiment may include: All user-specific search space sets of the downlink bandwidth portion and/or the terminal on the initial active downlink bandwidth portion are activated on one time slot.
  • S1902 Map PDCCH candidates in the third set of user-specific search space sets according to a carrier index and a search space set index.
  • the manner in which the terminal maps the PDCCH candidate should be the same as the manner in which the base station maps the PDCCH candidate.
  • Mapping the PDCCH candidates in the third set of user-specific search space sets according to the carrier index and the search space set index in the current time slot comprises: sequentially selecting a third set of user-specific search spaces on each carrier according to a carrier index from low to high. The PDCCH candidates in the set are mapped. On the same carrier, the PDCCH candidates in the third user-specific search space set are sequentially mapped according to the search space set index from low to high.
  • mapping the PDCCH candidates in the third set of user-specific search space sets according to the carrier index and the search space set index in the current time slot includes: sequentially, in order from low to high, the carrier index is alternately The PDCCH candidate mapping in the third set of user-specific search space sets on the carrier; on the same carrier, the PDCCH candidate mappings in the third user-specific search space set are sequentially mapped according to the search space set index from low to high.
  • the search space set maps the PDCCH candidates in the third user-specific search space set in order according to the carrier index from low to high.
  • the order may be: according to the search space set index from low to high, After all the PDCCH candidates that need to be mapped are mapped to the third user-specific search space set corresponding to one search space set index, the PDCCH candidates are mapped to the third user-specific search space set corresponding to one search space set index.
  • mapping the PDCCH candidate in the third set of user-specific search space sets according to the carrier index and the search space set index includes at least one of the following manners:
  • the PDCCH candidates are mapped in the third set of user-specific search space sets directly according to the carrier index and the search space set index.
  • mapping the PDCCH candidate in the third set of user-specific search space sets including: mapping the PDCCH candidate to the PDCCH candidate in the third set of user-specific search space sets on the primary cell carrier, according to the carrier index from low to high
  • the PDCCH candidate mapping PDCCH candidate in the third set of user-specific search space sets on each secondary cell carrier is sequentially sequenced; on the same carrier, the third user-specific search is sequentially performed according to the search space set index from low to high.
  • the PDCCH candidate in the space set maps PDCCH candidates.
  • mapping PDCCH candidates in the third set of user-specific search space sets according to a carrier index, a search space set index, and a slot index. Specifically, the period is set according to the slot index and the mapping sequence of each third user-specific search space set in each of the third set of user-specific search space sets on each carrier, and the time slot corresponding to the slot index is determined on each carrier.
  • the PDCCH candidate maps the PDCCH candidates; on the same carrier, the PDCCH candidates are mapped to the PDCCH candidates in the third user-specific search space set in order from the lowest to the highest in the search space set index.
  • the third user-specific search space set is first according to the foregoing embodiment 1.
  • Means, determining whether each third user-specific search space set is a first user-specific search space set or a second user-specific search space set, and then each third user-specific search space set of the first user-specific search space set is as described above
  • the first selection rule in the first embodiment is selected, and the third user-specific search space set in the second user-specific search space set is selected according to the second selection rule in the first embodiment, and the terminal should adopt correspondingly.
  • the PDCCH mapping and PDCCH monitoring are performed in the manner of the first embodiment.
  • the PDCCH candidate mapped by the terminal should ensure that the PDCCH candidate monitoring number corresponding to the mapped total PDCCH candidate is less than or equal to the processing threshold of the PDCCH candidate monitoring number of the terminal, and the number of CCEs corresponding to the mapped total PDCCH candidate. Less than or equal to the CCE processing threshold of the terminal.
  • the total PDCCH candidate of the foregoing mapping includes the PDCCH candidate mapped in the user-specific search space set and the PDCCH candidate mapped in the common search space set.
  • the candidate channel mapping method by configuring a third set of user-specific search space sets for the terminal, and mapping PDCCH candidates in the third set of user-specific search space sets according to the carrier index and the search space set index, The PDCCH candidates are filtered.
  • the PDCCH candidate processing threshold value of the terminal is combined with the CCE processing threshold value, so as to ensure that the PDCCH candidate finally retained in one slot and the finally retained CCE number required for channel estimation are supported by the UE.
  • Embodiment 3 is a diagrammatic representation of Embodiment 3
  • This embodiment further exemplifies the solution of the present disclosure on the basis of the first embodiment and/or the second embodiment.
  • the base station maps PDCCH candidates from the third set of user-specific search space sets.
  • the third set of user-specific search space sets includes a base station configured to configure all PDCCH candidates in all user-specific search space sets in one time slot for one terminal, as shown in FIG. 13 .
  • the base station determines the third set of user-specific search space sets according to the configuration of the high-level parameters of the base station.
  • the PDCCH candidate is mapped from the third set of user-specific search space sets, based on: selecting all PDCCH candidates to be mapped on one carrier according to the carrier index from low to high, and mapping the PDCCH to the next carrier.
  • the set of search spaces configured by the base station for the terminal includes a common search space set and a user-specific search space set.
  • mapping the PDCCH candidates to the user-specific search space set after mapping all PDCCH candidates in all common search space sets on one slot, mapping the PDCCH candidates to the user-specific search space set.
  • the set of user-specific search spaces configured by the base station for the terminal includes USS set 3 and USS set 4.
  • USS set 3 on carrier 1 is as follows:
  • USS set 3 is a user-specific search space set: the PDCCH monitoring period is 1 time slot; there are two PDCCH monitoring times on the PDCCH monitoring time slot (ie, indicating two PDCCH monitoring (starting) symbol positions); the aggregation level AL1 includes 4 PDCCH candidates; aggregation level AL2 includes 4 PDCCH candidates;
  • USS set 4 on carrier 1 is as follows:
  • the USS set 4 is a user-specific search space set: the PDCCH monitoring period is 5 time slots; the PDCCH monitoring time slot has 1 PDCCH monitoring time (ie, indicating 1 PDCCH monitoring (starting) symbol position); the aggregation level AL1 includes 4 PDCCH candidates; aggregation level AL2 includes 4 PDCCH candidates.
  • the set of user-specific search spaces configured by the base station for the terminal includes USS set 3 and USS set 4.
  • the USS set 3 is a user-specific search space set: the PDCCH monitoring period is 1 time slot; the PDCCH monitoring time slot has 2 PDCCH monitoring times (ie, indicating 2 PDCCH monitoring (starting) symbol positions); the aggregation level AL2 includes 2 PDCCH candidates.
  • the relevant configuration for search space set 4 on carrier 2 is as follows:
  • USS set 4 is a user-specific search space set: the PDCCH monitoring period is 5 slots; the PDCCH monitoring slot has 1 PDCCH monitoring time (ie, indicating 1 PDCCH monitoring (starting) symbol position); the aggregation level AL1 includes 4 PDCCH candidates; aggregation level AL2 includes 4 PDCCH candidates.
  • one PDCCH monitoring time includes one or more PDCCH start symbols, and different PDCCH start times have different PDCCH start symbols, and different PDCCH candidate monitoring moments may exist. Overlapping PDCCH start symbols.
  • the slot n includes the common search space set configured by the base station, the USS set 3 on the carrier 1, the USS set 4 on the carrier 1, the USS set 3 on the carrier 2, and the USS set 4 on the carrier 2.
  • the PDCCH candidate configured by the base station on the slot n is as shown in FIG.
  • all PDCCH candidates in the common search space set are first mapped on the slot n; then, the PDCCH candidates are mapped to the user-specific search space set in the following order:
  • the search is performed in descending order according to the search space set index. All PDCCH candidates in the space set that need to be mapped.
  • the base station first performs mapping of PDCCH candidates on USS set 3 and USS set 4 corresponding to carrier index 1 (CC1) according to a carrier index from low to high; and then, on the carrier index.
  • the USS set 3 and the USS set 4 corresponding to 2 (CC 2) perform mapping of PDCCH candidates.
  • the base station maps all PDCCH candidates that need to be mapped to the previous user-specific search space set in descending order of the search space set index, and then performs PDCCH on the next user-specific search space set corresponding to the carrier index.
  • Candidate mapping For example, in the carrier 1, after mapping the PDCCH candidate to the USS set 3, the PDCCH candidate mapping is selected for the USS set 4.
  • the mapping order of the user-specific search space sets corresponding to different carrier indexes is as shown in FIG.
  • the mapped PDCCH candidate needs to ensure that the channel estimation capability (CCE processing threshold) and/or the blind detection number capability (PDCCH candidate processing threshold) of the terminal are not exceeded.
  • the base station selects one or more PDCCH candidates on the selected mapped PDCCH candidate to carry the downlink control information as the PDCCH channel, and sends the downlink control information to the terminal.
  • the terminal maps PDCCH candidates from the third set of user-specific search space sets.
  • the third set of user-specific search space sets includes a base station configured to configure all PDCCH candidates in all user-specific search space sets in one time slot for one terminal, as shown in FIG. 13 .
  • the terminal determines the third set of user-specific search space sets according to the configuration of the high-level parameters of the base station.
  • the PDCCH candidate is mapped from the third set of user-specific search space sets, based on: mapping all PDCCH candidates that need to be mapped on one carrier according to the carrier index from low to high, and mapping the PDCCH to the next carrier. Candidates; within one carrier, all PDCCH candidates in the search space set that need to be mapped are mapped according to the order of the search space set index from low to high.
  • the set of search spaces configured by the base station for the terminal includes a common search space set and a user-specific search space set.
  • the PDCCH candidates are mapped to the user-specific search space set.
  • the set of user-specific search spaces configured by the base station for the terminal includes USS set 3 and USS set 4.
  • USS set 3 on carrier 1 is as follows:
  • USS set 3 is a user-specific search space set: the PDCCH monitoring period is 1 time slot; there are two PDCCH monitoring times on the PDCCH monitoring time slot (ie, indicating two PDCCH monitoring (starting) symbol positions); the aggregation level AL1 includes 4 PDCCH candidates; aggregation level AL2 includes 4 PDCCH candidates;
  • USS set 4 on carrier 1 is as follows:
  • the USS set 4 is a user-specific search space set: the PDCCH monitoring period is 5 time slots; the PDCCH monitoring time slot has 1 PDCCH monitoring time (ie, indicating 1 PDCCH monitoring (starting) symbol position); the aggregation level AL1 includes 4 PDCCH candidates; aggregation level AL2 includes 4 PDCCH candidates.
  • the set of user-specific search spaces configured by the base station for the terminal includes USS set 3 and USS set 4.
  • the USS set 3 is a user-specific search space set: the PDCCH monitoring period is 1 time slot; the PDCCH monitoring time slot has 2 PDCCH monitoring times (ie, indicating 2 PDCCH monitoring (starting) symbol positions); the aggregation level AL2 includes 2 PDCCH candidates.
  • the relevant configuration for search space set 4 on carrier 2 is as follows:
  • USS set 4 is a user-specific search space set: the PDCCH monitoring period is 5 slots; the PDCCH monitoring slot has 1 PDCCH monitoring time (ie, indicating 1 PDCCH monitoring (starting) symbol position); the aggregation level AL1 includes 4 PDCCH candidates; aggregation level AL2 includes 4 PDCCH candidates.
  • one PDCCH monitoring time includes one or more PDCCH start symbols, and different PDCCH start times have different PDCCH start symbols, and different PDCCH candidate monitoring times may exist with overlapping PDCCHs. Start symbol.
  • the slot n includes the common search space set configured by the base station, the USS set 3 on the carrier 1, the USS set 4 on the carrier 1, the USS set 3 on the carrier 2, and the USS set 4 on the carrier 2.
  • the PDCCH candidate configured by the base station on the slot n is as shown in FIG.
  • all PDCCH candidates in the common search space set are mapped first on the slot n; then, the PDCCH candidates are mapped to the user-specific search space set in the following order:
  • the search is performed in descending order according to the search space set index. All PDCCH candidates in the space set that need to be mapped.
  • the terminal first performs PDCCH candidate mapping on the USS set 3 and the USS set 4 corresponding to the carrier index 1 (CC1) according to the carrier index from low to high; and then, on the carrier index 2 (CC 2)
  • the corresponding USS set 3 and USS set 4 perform PDCCH candidate mapping.
  • the base station maps all PDCCH candidates that need to be mapped to the previous user-specific search space set in descending order of the search space set index, and then performs PDCCH on the next user-specific search space set corresponding to the carrier index.
  • Candidate mapping For example, in the carrier 1, after mapping the PDCCH candidate to the USS set 3, the PDCCH candidate of the USS set 4 is mapped.
  • the mapping order of the user-specific search space sets corresponding to different carrier indexes is as shown in FIG.
  • the mapped PDCCH candidate needs to ensure that the channel estimation capability and/or the number of blind detections of the terminal are not exceeded.
  • the PDCCH blind detection of the terminal is restricted to the PDCCH candidate set corresponding to the mapped PDCCH candidate.
  • Embodiment 4 is a diagrammatic representation of Embodiment 4:
  • This embodiment further exemplifies the solution of the present disclosure on the basis of the first embodiment and/or the second embodiment.
  • the base station maps PDCCH candidates from the third set of user-specific search space sets.
  • the third set of user-specific search space sets includes a base station configured for all terminals to configure all PDCCH candidates in all user-specific search space sets in one time slot, as shown in FIG. 17.
  • the base station determines the third set of user-specific search space sets according to the configuration of the high-level parameters of the base station.
  • the PDCCH candidates are mapped from the third set of user-specific search space sets, based on: mapping the PDCCH candidates that need to be mapped in one search space set for each carrier that is alternated according to the carrier index from low to high. Within one carrier, all PDCCH candidates in the user-specific search space set that need to be mapped are selected in descending order of the search space set index.
  • the mapping order of the PDCCH candidates of the user-specific search space set is as follows: all the PDCCH candidates in the user-specific search space set that need to be mapped are alternately mapped according to the carrier index from low to high; for the same carrier index, the base station After all the PDCCH candidates that need to be mapped are mapped to the previous user-specific search space set in descending order of the search space set index, the PDCCH candidate mapping is performed on the next user-specific search space set corresponding to the carrier index.
  • the set of search spaces configured by the base station for the terminal includes a common search space set and a user-specific search space set.
  • mapping the PDCCH candidates to the user-specific search space set after mapping all PDCCH candidates in all common search space sets on one slot, mapping the PDCCH candidates to the user-specific search space set.
  • the set of user-specific search spaces configured by the base station for the terminal includes USS set 3 and USS set 4.
  • USS set 3 on carrier 1 is as follows:
  • USS set 3 is a user-specific search space set: the PDCCH monitoring period is 1 time slot; there are two PDCCH monitoring times on the PDCCH monitoring time slot (ie, indicating two PDCCH monitoring (starting) symbol positions); the aggregation level AL1 includes 4 PDCCH candidates; aggregation level AL2 includes 4 PDCCH candidates;
  • USS set 4 on carrier 1 is as follows:
  • the USS set 4 is a user-specific search space set: the PDCCH monitoring period is 5 time slots; the PDCCH monitoring time slot has 1 PDCCH monitoring time (ie, indicating 1 PDCCH monitoring (starting) symbol position); the aggregation level AL1 includes 4 PDCCH candidates; aggregation level AL2 includes 4 PDCCH candidates.
  • the set of user-specific search spaces configured by the base station for the terminal includes USS set 3 and USS set 4.
  • the USS set 3 is a user-specific search space set: the PDCCH monitoring period is 1 time slot; the PDCCH monitoring time slot has 2 PDCCH monitoring times (ie, indicating 2 PDCCH monitoring (starting) symbol positions); the aggregation level AL2 includes 2 PDCCH candidates.
  • the relevant configuration for search space set 4 on carrier 2 is as follows:
  • USS set 4 is a user-specific search space set: the PDCCH monitoring period is 5 slots; the PDCCH monitoring slot has 1 PDCCH monitoring time (ie, indicating 1 PDCCH monitoring (starting) symbol position); the aggregation level AL1 includes 4 PDCCH candidates; aggregation level AL2 includes 4 PDCCH candidates.
  • one PDCCH monitoring time includes one or more PDCCH start symbols, and different PDCCH start times have different PDCCH start symbols, and different PDCCH candidate monitoring moments may exist. Overlapping PDCCH start symbols.
  • the slot n includes the common search space set configured by the base station, the USS set 3 on the carrier 1, the USS set 4 on the carrier 1, the USS set 3 on the carrier 2, and the USS set 4 on the carrier 2.
  • the PDCCH candidate configured by the base station on the slot n is as shown in FIG. 17.
  • all PDCCH candidate mappings in the common search space set are first selected on the slot n; then, the PDCCH candidates are mapped to the user-specific search space set in the following order:
  • each carrier alternately maps all PDCCH candidates that need to be mapped in a user-specific search space set; in one carrier, maps users according to the order of user-specific search space from low to high. All PDCCH candidates in the specific search space set that need to be mapped.
  • the base station performs mapping of PDCCH candidates in the following order for the user-specific search space set mapping PDCCH candidates:
  • the mapped PDCCH candidate needs to ensure that the channel estimation capability (CCE processing threshold) and/or the blind detection number capability (PDCCH candidate processing threshold) of the terminal are not exceeded.
  • the base station selects one or more PDCCH candidates on the selected mapped PDCCH candidate to carry the downlink control information as the PDCCH channel, and sends the downlink control information to the terminal.
  • the third set of user-specific search space sets includes a base station configured for all terminals to configure all PDCCH candidates in all user-specific search space sets in one time slot, as shown in FIG. 17.
  • the terminal determines the third set of user-specific search space sets according to the configuration of the high-level parameters of the base station.
  • the PDCCH candidates are mapped from the third set of user-specific search space sets, based on: mapping the PDCCH candidates that need to be mapped in one search space set for each carrier that is alternated according to the carrier index from low to high. Within one carrier, all PDCCH candidates in the user-specific search space set that need to be mapped are mapped in descending order of the search space set index.
  • the mapping order of the PDCCH candidates of the user-specific search space set is as follows: all the PDCCH candidates in the user-specific search space set that need to be mapped are alternately mapped according to the carrier index from low to high; for the same carrier index, the terminal After all the PDCCH candidates that need to be mapped are mapped to the previous user-specific search space set in descending order of the search space set index, the PDCCH candidate mapping is performed on the next user-specific search space set corresponding to the carrier index.
  • the set of search spaces configured by the base station for the terminal includes a common search space set and a user-specific search space set.
  • the terminal maps PDCCH candidates to the user-specific search space set.
  • the set of user-specific search spaces configured by the base station for the terminal includes USS set 3 and USS set 4.
  • USS set 3 on carrier 1 is as follows:
  • USS set 3 is a user-specific search space set: the PDCCH monitoring period is 1 time slot; there are two PDCCH monitoring times on the PDCCH monitoring time slot (ie, indicating two PDCCH monitoring (starting) symbol positions); the aggregation level AL1 includes 4 PDCCH candidates; aggregation level AL2 includes 4 PDCCH candidates;
  • USS set 4 on carrier 1 is as follows:
  • the USS set 4 is a user-specific search space set: the PDCCH monitoring period is 5 time slots; the PDCCH monitoring time slot has 1 PDCCH monitoring time (ie, indicating 1 PDCCH monitoring (starting) symbol position); the aggregation level AL1 includes 4 PDCCH candidates; aggregation level AL2 includes 4 PDCCH candidates.
  • the set of user-specific search spaces configured by the base station for the terminal includes USS set 3 and USS set 4.
  • the USS set 3 is a user-specific search space set: the PDCCH monitoring period is 1 time slot; the PDCCH monitoring time slot has 2 PDCCH monitoring times (ie, indicating 2 PDCCH monitoring (starting) symbol positions); the aggregation level AL2 includes 2 PDCCH candidates.
  • the relevant configuration for search space set 4 on carrier 2 is as follows:
  • USS set 4 is a user-specific search space set: the PDCCH monitoring period is 5 slots; the PDCCH monitoring slot has 1 PDCCH monitoring time (ie, indicating 1 PDCCH monitoring (starting) symbol position); the aggregation level AL1 includes 4 PDCCH candidates; aggregation level AL2 includes 4 PDCCH candidates.
  • one PDCCH monitoring time includes one or more PDCCH start symbols, different PDCCH start symbols are different at different PDCCH monitoring moments, and overlapping PDCCH starts may exist between different PDCCH candidate monitoring moments. symbol.
  • the slot n includes the common search space set configured by the base station, the USS set 3 on the carrier 1, the USS set 4 on the carrier 1, the USS set 3 on the carrier 2, and the USS set 4 on the carrier 2.
  • the PDCCH candidate configured by the base station on the slot n is as shown in FIG. 17.
  • all PDCCH candidates in the common search space set are mapped first on the slot n; then, the PDCCH candidates are mapped to the user-specific search space set in the following order:
  • each carrier alternately maps all PDCCH candidates that need to be mapped in a user-specific search space set; in one carrier, maps users according to the order of user-specific search space from low to high. All PDCCH candidates in the specific search space set that need to be mapped.
  • the terminal performs mapping of PDCCH candidates in the following order for the user-specific search space set mapping PDCCH candidates:
  • the mapped PDCCH candidate needs to ensure that the channel estimation capability and/or the number of blind detections of the terminal are not exceeded.
  • the PDCCH blind detection of the terminal is restricted to the PDCCH candidate set corresponding to the mapped PDCCH candidate.
  • Embodiment 5 is a diagrammatic representation of Embodiment 5:
  • This embodiment further exemplifies the solution of the present disclosure on the basis of the first embodiment and/or the second embodiment.
  • the user-specific search space set configured by the base station includes a first set of user-specific search space sets and a second set of user-specific search space sets; and the first rule is used to map PDCCH candidates in the first set of user-specific search space sets; The PDCCH candidate is mapped in the second set of user-specific search space sets using the second rule.
  • the base station configures a user-specific search space set according to the configuration of the high-level parameters of the base station.
  • the user-specific search space set configured by the foregoing base station includes a first set of user-specific search space sets and a second set of user-specific search space sets, which may be configured in the following cases:
  • the specific search space set configured by some base stations for their home terminals belongs to the first set of user-specific search space sets, and the specific search space sets configured by other base stations for their home terminals belong to the second set of user-specific search space sets.
  • a plurality of user-specific search space sets configured by a base station for a plurality of terminals, comprising a first set of user-specific search space sets and a second set of user-specific search space sets.
  • a plurality of user-specific search space sets configured by a base station for a terminal, comprising a first set of user-specific search space sets and a second set of user-specific search space sets.
  • the base station configures a plurality of user-specific search space sets for one terminal, and may include a first set of user-specific search space sets and a second set of user-specific search space sets.
  • all user-specific search space sets whose number of PDCCH monitoring times in one slot is equal to 1 may be defined as a first set of user-specific search space sets; all user-specific searches in which the number of PDCCH monitoring moments in one slot is greater than 1.
  • a spatial collection can be defined as a second set of user-specific search spaces.
  • a base station allocates a user-specific search space set, there is a user-specific search space set with only one PDCCH monitoring time in one slot, and a user-specific search space set with more than one PDCCH monitoring time in one slot.
  • the user-specific search space set can be allocated only one PDCCH monitoring time in one time slot.
  • User-specific search space set ie, first user-specific search space set
  • URLLC service because it has high real-time requirements, in order to ensure that the user-specific search space set corresponding to the URLLC service in the selection process will not be all Dropped, so a user-specific search space set (ie, a second user-specific search space set) with more than one PDCCH monitoring time in one slot can be allocated.
  • the first set of user-specific search space sets and the second set of user-specific search space sets are divided as shown in Figure 3.
  • a common search space set and three user-specific search space sets are included.
  • the first set of user-specific search space sets includes a user-specific search space set USS set 2 and a user-specific search space set USS set 3.
  • the second set of user-specific search spaces contains the user-specific search space set USS set 1.
  • PDCCH candidates there are two PDCCH candidates with an aggregation level of 1 and four PDCCH candidates with an aggregation level of two; one PDCCH candidate with an aggregation level of 1, consisting of one control channel unit, and one aggregation level is two.
  • the PDCCH candidate consists of 2 CCEs.
  • one PDCCH monitoring time includes one or more PDCCH time domain symbols (ie, PDCCH start symbols), and different PDCCH start times are different for PDCCH start time, and different PDCCH candidate monitoring times may overlap. Domain symbol. The time-frequency resource locations of different PDCCH candidates may overlap.
  • the PDCCH candidates mapped to the user-specific search space set are further mapped.
  • the PDCCH candidate mapping uses the first rule for the user-specific search space set belonging to the first set of user-specific search space sets.
  • the first rule is: mapping, for the user-specific search space set in the first set of user-specific search space sets, all PDCCH candidates in the user-specific search space set on one time slot; that is, the first set for one time slot
  • the PDCCH candidates in one search space set in the search space set are either all mapped or none mapped.
  • the mapping PDCCH candidate uses the second rule for the user-specific search space set belonging to the second set of user-specific search space sets.
  • the second rule is characterized in that for a user-specific search space set in the second set of user-specific search space sets, only partial PDCCH candidates in the user-specific search space set may be mapped.
  • the mapped PDCCH candidate needs to ensure that the channel estimation capability (CCE processing threshold) and/or the blind detection number capability (PDCCH candidate processing threshold) of the terminal are not exceeded.
  • the base station selects one or more PDCCH candidates on the selected mapped PDCCH candidate to carry the downlink control information as the PDCCH channel, and sends the downlink control information to the terminal.
  • the user-specific search space set configured by the base station includes a first set of user-specific search space sets and a second set of user-specific search space sets; and the first rule is used to map PDCCH candidates in the first set of user-specific search space sets; The PDCCH candidate is mapped in the second set of user-specific search space sets using the second rule.
  • the terminal determines the user-specific search space set according to the configuration of the high-level parameters of the base station.
  • the user-specific search space set configured by the foregoing base station includes a first set of user-specific search space sets and a second set of user-specific search space sets, which may be configured in the following cases:
  • the specific search space set configured by some base stations for their home terminals belongs to the first set of user-specific search space sets, and the specific search space sets configured by other base stations for their home terminals belong to the second set of user-specific search space sets.
  • a plurality of user-specific search space sets configured by a base station for a plurality of terminals, comprising a first set of user-specific search space sets and a second set of user-specific search space sets.
  • a plurality of user-specific search space sets configured by a base station for a terminal, comprising a first set of user-specific search space sets and a second set of user-specific search space sets.
  • the base station configures a plurality of user-specific search space sets for one terminal, and may include a first set of user-specific search space sets and a second set of user-specific search space sets.
  • all user-specific search space sets whose number of PDCCH monitoring times in one slot is equal to 1 may be defined as a first set of user-specific search space sets; all user-specific searches in which the number of PDCCH monitoring moments in one slot is greater than 1.
  • a spatial collection can be defined as a second set of user-specific search spaces.
  • the first set of user-specific search space sets and the second set of user-specific search space sets are divided as shown in Figure 3.
  • a common search space set and three user-specific search space sets are included.
  • the first set of user-specific search space sets contains a user-specific search space set USS set 2 and a user-specific search space set USS set 3.
  • the second set of user-specific search spaces contains the user-specific search space set USS set 1.
  • PDCCH candidates there are two PDCCH candidates with an aggregation level of 1 and four PDCCH candidates with an aggregation level of two; one PDCCH candidate with an aggregation level of 1, consisting of one control channel unit, and one aggregation level is two.
  • the PDCCH candidate consists of 2 CCEs.
  • one PDCCH monitoring time includes one or more PDCCH time domain symbols (ie, PDCCH start symbols), and different PDCCH start times are different for PDCCH start time, and different PDCCH candidate monitoring times may overlap. Domain symbol. The time-frequency resource locations of different PDCCH candidates may overlap.
  • the terminal after mapping all PDCCH candidates in all common search space sets on one slot, maps PDCCH candidates to the user-specific search space set.
  • the PDCCH candidate mapping uses the first rule for the user-specific search space set belonging to the first set of user-specific search space sets.
  • the first rule is: mapping, for the user-specific search space set in the first set of user-specific search space sets, all PDCCH candidates in the user-specific search space set on one time slot; that is, the first set for one time slot
  • the PDCCH candidates in one search space set in the search space set are either all mapped or none mapped.
  • the mapping PDCCH candidate uses the second rule for the user-specific search space set belonging to the second set of user-specific search space sets.
  • the second rule is characterized in that for one search space set in the second set of search space sets, only partial PDCCH candidates in the search space set may be mapped.
  • the mapped PDCCH candidate needs to ensure that the channel estimation capability and/or the number of blind detections of the terminal are not exceeded.
  • the PDCCH blind detection of the terminal is restricted to the PDCCH candidate set corresponding to the mapped PDCCH candidate.
  • This embodiment further exemplifies the solution of the present disclosure on the basis of the fifth embodiment.
  • the base station configures a plurality of user-specific search space sets for the terminal, and includes a first set of user-specific search space sets and a second set of user-specific search space sets.
  • the first rule is used when mapping the PDCCH candidate for the first user-specific search space set belonging to the first set of user-specific search space sets.
  • the first rule is: mapping, for the user-specific search space set in the first set of user-specific search space sets, all PDCCH candidates in the user-specific search space set on one time slot; that is, the first set for one time slot
  • the PDCCH candidates in one search space set in the search space set are either all mapped or none mapped.
  • the mapping PDCCH candidate uses the second rule for the user-specific search space set belonging to the second set of user-specific search space sets.
  • the second rule is that for any one of the second set of user-specific search spaces in the second set of user-specific search space sets in one slot, the mapping PDCCH candidate is performed according to any of the following rules:
  • the set of search spaces configured by the base station for the terminal includes a common search space set and a user-specific search space set.
  • mapping when mapping, all PDCCH candidates in the common search space set on one slot are mapped first, and then PDCCH candidates are mapped to the user-specific search space set.
  • the PDCCH monitoring period is 1 time slot; there are 4 PDCCH monitoring times on the PDCCH monitoring time slot (ie, indicating 4 PDCCH monitoring (starting) symbol positions); the aggregation level AL1 includes 4 PDCCH candidates; the aggregation level AL2 includes 4 PDCCH candidate.
  • one PDCCH monitoring time includes one or more PDCCH time domain symbols, and different PDCCH start times have different PDCCH start symbols, and different PDCCH candidate monitoring times may overlap. PDCCH time domain symbol.
  • all PDCCH candidates in the common search space set are mapped first, then PDCCH candidates in the user-specific search space set that need to be mapped before the USS set s are mapped, and then the PDCCH is mapped to the USS set s on the carrier c.
  • the second rule is: all PDCCH candidates corresponding to the USS set s at one PDCCH monitoring time are mapped in descending order according to the PDCCH monitoring time index order (or the start symbol index). As shown in Figure 5. In FIG. 5, all PDCCH candidates corresponding to each occasion are sequentially mapped in the order of occasion0-occasion3. If the number of CCEs and/or the number of PDCCH blind detections of the channel estimation is reached after the second mapping, the mapping is stopped and the mapping is no longer performed. The mapping effect can be seen in Figure 5 (the mapping with shadows) PDCCH candidate), occasion2 and occasion3 corresponding PDCCH candidates are not mapped.
  • the second rule is to: map all PDCCH candidates corresponding to the USS set s at one PDCCH monitoring time according to the interleaved PDCCH monitoring time index (or starting symbol index). As shown in Figure 6. In FIG. 6, all PDCCH candidates corresponding to each occasion are sequentially mapped in the order of occasion0-occasion2-occasion1-occasion3. If the number of CCEs and/or the number of PDCCH blind detections of the channel estimation of the terminal are reached after the second mapping, the mapping is stopped and the mapping is no longer performed. The mapping effect can be seen in FIG. 6 (the mapping with shadows) PDCCH candidate), PDCCH candidates corresponding to occasion1 and occasion3 are not mapped.
  • the base station obtains the following manner:
  • the PDCCH monitoring time index 0 to 3 is written into the interleaving matrix of 2 lines in rows, and the result is as follows:
  • the mapped PDCCH candidate needs to ensure that the channel estimation capability (CCE processing threshold) and/or the blind detection number capability (PDCCH candidate processing threshold) of the terminal are not exceeded.
  • the base station selects one or more PDCCH candidates on the selected mapped PDCCH candidate to carry the downlink control information as the PDCCH channel, and sends the downlink control information to the terminal.
  • the terminal determines a plurality of user-specific search space sets, and includes a first set of user-specific search space sets and a second set of user-specific search space sets.
  • the first rule is used when mapping the PDCCH candidate for the first user-specific search space set belonging to the first set of user-specific search space sets.
  • the first rule is: mapping, for the user-specific search space set in the first set of user-specific search space sets, all PDCCH candidates in the user-specific search space set on one time slot; that is, the first set for one time slot
  • the PDCCH candidates in one search space set in the search space set are either all mapped or none mapped.
  • the mapping PDCCH candidate uses the second rule for the user-specific search space set belonging to the second set of user-specific search space sets.
  • the second rule is that for any one of the second set of user-specific search spaces in the second set of user-specific search space sets in one slot, the mapping PDCCH candidate is performed according to any of the following rules:
  • the set of search spaces configured by the base station for the terminal includes a common search space set and a user-specific search space set.
  • mapping when mapping, all PDCCH candidates in the common search space set on one slot are mapped first, and then PDCCH candidates are mapped to the user-specific search space set.
  • the PDCCH monitoring period is 1 time slot; there are 4 PDCCH monitoring times on the PDCCH monitoring time slot (ie, indicating 4 PDCCH monitoring (starting) symbol positions); the aggregation level AL1 includes 4 PDCCH candidates; the aggregation level AL2 includes 4 PDCCH candidate.
  • one PDCCH monitoring time includes one or more PDCCH time domain symbols, and different PDCCH start times have different PDCCH start symbols, and different PDCCH candidate monitoring times may overlap. PDCCH time domain symbol.
  • all PDCCH candidates in the common search space set are mapped first, then PDCCH candidates in the user-specific search space set that need to be mapped before the USS set s are mapped, and then the PDCCH is mapped to the USS set s on the carrier c.
  • the second rule is: all PDCCH candidates corresponding to the USS set s at one PDCCH monitoring time are mapped in descending order according to the PDCCH monitoring time index order (or the start symbol index). As shown in Figure 5. In FIG. 5, all PDCCH candidates corresponding to each occasion are sequentially mapped in the order of occasion0-occasion3. If the number of CCEs and/or the number of PDCCH blind detections of the channel estimation is reached after the second mapping, the mapping is stopped and the mapping is no longer performed. The mapping effect can be seen in Figure 5 (the mapping with shadows) PDCCH candidate), occasion2 and occasion3 corresponding PDCCH candidates are not mapped.
  • the second rule is further configured to: sequentially map all PDCCH candidates corresponding to the USS set s at one PDCCH monitoring time according to the interleaved PDCCH monitoring time index (or starting symbol index). As shown in Figure 6. In FIG. 6, all PDCCH candidates corresponding to each occasion are sequentially mapped in the order of occasion0-occasion2-occasion1-occasion3. If the number of CCEs and/or the number of PDCCH blind detections of the channel estimation of the terminal are reached after the second mapping, the mapping is stopped and the mapping is no longer performed. The mapping effect can be seen in FIG. 6 (the mapping with shadows) PDCCH candidate), PDCCH candidates corresponding to occasion1 and occasion3 are not mapped.
  • the base station obtains the following manner:
  • the PDCCH monitoring time index 0 to 3 is written into the interleaving matrix of 2 lines in rows, and the result is as follows:
  • the mapped PDCCH candidate needs to ensure that the channel estimation capability and/or the number of blind detections of the terminal are not exceeded.
  • the PDCCH blind detection of the terminal is restricted to the PDCCH candidate set corresponding to the mapped PDCCH candidate.
  • This embodiment further exemplifies the solution of the present disclosure on the basis of the fifth embodiment.
  • the base station configures a plurality of user-specific search space sets for the terminal, and includes a first set of user-specific search space sets and a second set of user-specific search space sets.
  • the first rule is used when mapping the PDCCH candidate for the first user-specific search space set belonging to the first set of user-specific search space sets.
  • the first rule is: mapping, for the user-specific search space set in the first set of user-specific search space sets, all PDCCH candidates in the user-specific search space set on one time slot; that is, the first set for one time slot
  • the PDCCH candidates in one search space set in the search space set are either all mapped or none mapped.
  • the mapping PDCCH candidate uses the second rule.
  • the second rule is to map all PDCCH candidates whose search space set is at one aggregation level based on the order of aggregation level from high to low.
  • the set of search spaces configured by the base station for the terminal includes a common search space set and a user-specific search space set.
  • mapping when mapping, all PDCCH candidates in the common search space set on one slot are mapped first, and then PDCCH candidates are mapped to the user-specific search space set.
  • the carrier-specific search space set USS set s is set on the carrier c, and the USS set s related configuration is as follows:
  • the PDCCH monitoring period is 1 time slot; there are 2 PDCCH monitoring times on the PDCCH monitoring time slot (ie, indicating 2 PDCCH monitoring (starting) symbol positions); the aggregation level AL1 includes 4 PDCCH candidates; the aggregation level AL2 includes 4 PDCCH candidate; aggregation level AL4 includes 2 PDCCH candidates.
  • one PDCCH monitoring time includes one or more PDCCH time domain symbols, and different PDCCH start times have different PDCCH start symbols, and different PDCCH candidate monitoring times may overlap. PDCCH time domain symbol.
  • all PDCCH candidates in the common search space set are mapped first, then PDCCH candidates in the user-specific search space set that need to be mapped before the USS set s are mapped, and then the PDCCH is mapped to the USS set s on the carrier c.
  • the slot n is the PDCCH detection slot of the USS set s corresponding to the carrier c.
  • USS set s be the second user-specific search space set, then the PDCCH candidate mapping uses the second rule.
  • the second rule is to map all PDCCH candidates of the USS set s at one aggregation level based on the order of aggregation level from high to low. For a PDCCH candidate in the USS set s corresponding to one aggregation level on one time slot, all of the PDCCH candidates are mapped or not mapped. As shown in FIG. 7, in FIG. 7, the PDCCH candidate mapping of aggregation level 4 (AL4) is first mapped, and then the PDCCH candidate of AL2 is mapped; and the PDCCH candidate of AL1 is mapped.
  • AL4 aggregation level 4
  • the number of PDCCH candidates that can be mapped is 12
  • the number of CCEs and/or the number of PDCCH blind detections of the channel estimation of the terminal may be continued if the PDCCH candidate is mapped after the PDCCH candidate mapping is performed on the AL2 in the USS set s.
  • the threshold of the PDCCH candidate is terminated when the threshold is exceeded.
  • the mapping effect can be seen in Figure 7 (shaded is the mapped PDCCH candidate).
  • the mapped PDCCH candidate needs to ensure that the channel estimation capability (CCE processing threshold) and/or the blind detection number capability (PDCCH candidate processing threshold) of the terminal are not exceeded.
  • the base station selects one or more PDCCH candidates on the selected mapped PDCCH candidate to carry the downlink control information as the PDCCH channel, and sends the downlink control information to the terminal.
  • the terminal determines a plurality of user-specific search space sets, and includes a first set of user-specific search space sets and a second set of user-specific search space sets.
  • the first rule is used when mapping the PDCCH candidate for the first user-specific search space set belonging to the first set of user-specific search space sets.
  • the first rule is: mapping, for the user-specific search space set in the first set of user-specific search space sets, all PDCCH candidates in the user-specific search space set on one time slot; that is, the first set for one time slot
  • the PDCCH candidates in one search space set in the search space set are either all mapped or none mapped.
  • the mapping PDCCH candidate uses the second rule.
  • the second rule is to map all PDCCH candidates whose search space set is at one aggregation level based on the order of aggregation level from high to low.
  • the set of search spaces configured by the base station for the terminal includes a common search space set and a user-specific search space set.
  • mapping when mapping, all PDCCH candidates in the common search space set on one slot are mapped first, and then PDCCH candidates are mapped to the user-specific search space set.
  • the carrier-specific search space set USS set s is set on the carrier c, and the USS set s related configuration is as follows:
  • the PDCCH monitoring period is 1 time slot; there are 2 PDCCH monitoring times on the PDCCH monitoring time slot (ie, indicating 2 PDCCH monitoring (starting) symbol positions); the aggregation level AL1 includes 4 PDCCH candidates; the aggregation level AL2 includes 4 PDCCH candidate; aggregation level AL4 includes 2 PDCCH candidates.
  • one PDCCH monitoring time includes one or more PDCCH time domain symbols, and different PDCCH start times have different PDCCH start symbols, and different PDCCH candidate monitoring times may overlap. PDCCH time domain symbol.
  • all PDCCH candidates in the common search space set are mapped first, then PDCCH candidates in the user-specific search space set that need to be mapped before USSset s are mapped, and PDCCH candidates are mapped to USS set s on carrier c. . It is assumed that the slot n is the PDCCH detection slot of the USS set s corresponding to the carrier c. Let USS set s be the second user-specific search space set, then the PDCCH candidate mapping uses the second rule.
  • the second rule is to map all PDCCH candidates of the USS set s at one aggregation level based on the order of aggregation level from high to low. For a PDCCH candidate in the USS set s corresponding to one aggregation level on one time slot, all of the PDCCH candidates are mapped or not mapped. As shown in FIG. 7, in FIG. 7, the PDCCH candidate mapping of aggregation level 4 (AL4) is first mapped, and then the PDCCH candidate of AL2 is mapped; and the PDCCH candidate of AL1 is mapped.
  • AL4 aggregation level 4
  • the number of PDCCH candidates that can be mapped is 12
  • the number of CCEs and/or the number of PDCCH blind detections of the channel estimation of the terminal may be continued if the PDCCH candidate is mapped after the PDCCH candidate mapping is performed on the AL2 in the USS set s.
  • the threshold of the PDCCH candidate is terminated when the threshold is exceeded.
  • the mapped PDCCH candidate needs to ensure that the channel estimation capability and/or the number of blind detections of the terminal are not exceeded.
  • the PDCCH blind detection of the terminal is restricted to the PDCCH candidate set corresponding to the mapped PDCCH candidate.
  • This embodiment further exemplifies the solution of the present disclosure on the basis of the fifth embodiment.
  • the base station configures a plurality of user-specific search space sets for the terminal, and includes a first set of user-specific search space sets and a second set of user-specific search space sets.
  • the first rule is used when mapping the PDCCH candidate for the first user-specific search space set belonging to the first set of user-specific search space sets.
  • the first rule is: mapping, for the user-specific search space set in the first set of user-specific search space sets, all PDCCH candidates in the user-specific search space set on one time slot; that is, the first set for one time slot
  • the PDCCH candidates in one search space set in the search space set are either all mapped or none mapped.
  • the mapping PDCCH candidate uses the second rule.
  • the second rule is to map PDCCH candidates to a set of search spaces in one slot, based on:
  • PDCCH candidate mapping is performed on the aggregation level according to one of the following ways:
  • the set of search spaces configured by the base station for the terminal includes a common search space set and a user-specific search space set.
  • mapping when mapping, all PDCCH candidates in the common search space set on one slot are mapped first, and then PDCCH candidates are mapped to the user-specific search space set.
  • the carrier-specific search space set USS set s is set on the carrier c, and the USS set s related configuration is as follows:
  • the PDCCH monitoring period is 1 time slot; there are 4 PDCCH monitoring times on the PDCCH monitoring time slot (ie, indicating 4 PDCCH monitoring (starting) symbol positions); the aggregation level AL1 includes 4 PDCCH candidates; the aggregation level AL2 includes 4 PDCCH candidate.
  • one PDCCH monitoring time includes one or more PDCCH time domain symbols, and different PDCCH start times have different PDCCH start symbols, and different PDCCH candidate monitoring times may overlap. PDCCH time domain symbol.
  • all PDCCH candidates in the common search space set are mapped first, then PDCCH candidates in the user-specific search space set that need to be mapped before the USS set s are mapped, and then the PDCCH is mapped to the USS set s on the carrier c.
  • the slot n is the PDCCH detection slot of the USS set s corresponding to the carrier c.
  • USS set s be the second user-specific search space set, then the PDCCH candidate mapping uses the second rule.
  • the second rule is: mapping all PDCCH candidates that need to be mapped in the previous aggregation level according to the aggregation level from high to low, and then mapping the PDCCH candidates to the next aggregation level; for an aggregation level of mapping PDCCH candidates, based on The small to large PDCCH monitors the time index sequence, and maps all PDCCH candidates of the aggregation level in the USS set s at the PDCCH monitoring time.
  • the digital number of the PDCCH candidate set in FIG. 8 indicates the order in which the PDCCH candidates are mapped.
  • the PDCCH candidate is mapped to the AL2, and the mapping is performed according to the alignment corresponding to each AL2 PDCCH candidate in the order of occupancy0-occasion3.
  • the PDCCH candidate is mapped to the AL1, and the mapping is performed according to the occasion corresponding to each AL1PDCCH candidate.
  • the mapping effect can be seen in Figure 8 (shaded is the mapped PDCCH candidate).
  • the second rule is: mapping all PDCCH candidates that need to be mapped in the previous aggregation level according to the aggregation level from high to low, and then mapping PDCCH candidates to the next aggregation level; for one mapping PDCCH candidate aggregation level, based on interleaving
  • the PDCCH monitors the time index sequence, and maps all PDCCH candidates of the aggregation level in the USS set s at the PDCCH monitoring time.
  • the index of the PDCCH monitoring time index obtained by the interleaving matrix is 0, 2, 1, and 3.
  • the digital number of the PDCCH candidate set in FIG. 9 indicates the order in which the PDCCH candidates are mapped.
  • the PDCCH candidate is mapped to the AL2, and the mapping is performed according to the alignment corresponding to each AL2PDCCH candidate in the order of occupancy0-occasion2-occasion1-occasion3; the PDCCH candidate is mapped to the AL1, and the occasion corresponding to each AL1PDCCH candidate is mapped during mapping. , mapped in the order of occasion0-occasion2-occasion1-occasion3.
  • the PDCCH candidate value that can be mapped is currently 24, the PDCCH candidate mapping of the AL2 in the USS set s is performed, and then the PDCCH candidate of the AL1 is mapped, and after mapping to the occasion 2, the number of CCEs of the channel estimation of the terminal and/or Or the number of PDCCH blind detections reaches a threshold, and the mapping of PDCCH candidates is terminated.
  • the mapping effect can be seen in FIG. 9 (the PDCCH candidate with the shadow is mapped), and the PDCCH candidates of the AL1 in the occupancy1 and the occasion3 are not mapped.
  • the mapped PDCCH candidate needs to ensure that the channel estimation capability (CCE processing threshold) and/or the blind detection number capability (PDCCH candidate processing threshold) of the terminal are not exceeded.
  • the base station selects one or more PDCCH candidates on the selected mapped PDCCH candidate to carry the downlink control information as the PDCCH channel, and sends the downlink control information to the terminal.
  • the terminal determines a plurality of user-specific search space sets, and includes a first set of user-specific search space sets and a second set of user-specific search space sets.
  • the first rule is used when mapping the PDCCH candidate for the first user-specific search space set belonging to the first set of user-specific search space sets.
  • the first rule is: mapping, for the user-specific search space set in the first set of user-specific search space sets, all PDCCH candidates in the user-specific search space set on one time slot; that is, the first set for one time slot
  • the PDCCH candidates in one search space set in the search space set are either all mapped or none mapped.
  • the mapping PDCCH candidate uses the second rule.
  • the second rule is to map PDCCH candidates to a set of search spaces in one slot, based on:
  • PDCCH candidate mapping is performed on the aggregation level according to one of the following ways:
  • the set of search spaces configured by the base station for the terminal includes a common search space set and a user-specific search space set.
  • mapping when mapping, all PDCCH candidates in the common search space set on one slot are mapped first, and then PDCCH candidates are mapped to the user-specific search space set.
  • the carrier-specific search space set USS set s is set on the carrier c, and the USS set s related configuration is as follows:
  • the PDCCH monitoring period is 1 time slot; there are 4 PDCCH monitoring times on the PDCCH monitoring time slot (ie, indicating 4 PDCCH monitoring (starting) symbol positions); the aggregation level AL1 includes 4 PDCCH candidates; the aggregation level AL2 includes 4 PDCCH candidate.
  • one PDCCH monitoring time includes one or more PDCCH time domain symbols, and different PDCCH start times have different PDCCH start symbols, and different PDCCH candidate monitoring times may overlap. PDCCH time domain symbol.
  • all PDCCH candidates in the common search space set are mapped first, then PDCCH candidates in the user-specific search space set that need to be mapped before the USS set s are mapped, and then the PDCCH is mapped to the USS set s on the carrier c.
  • the slot n is the PDCCH detection slot of the USS set s corresponding to the carrier c.
  • USS set s be the second user-specific search space set, then the PDCCH candidate mapping uses the second rule.
  • the second rule is: mapping all PDCCH candidates that need to be mapped in the previous aggregation level according to the aggregation level from high to low, and then mapping the PDCCH candidates to the next aggregation level; for an aggregation level of mapping PDCCH candidates, based on The small to large PDCCH monitors the time index sequence, and maps all PDCCH candidates of the aggregation level in the USS set s at the PDCCH monitoring time. As shown in FIG. 8, the digital number of the PDCCH candidate set in FIG. 8 indicates the order in which the PDCCH candidates are mapped. In FIG.
  • the PDCCH candidate is mapped to the AL2, and the mapping is performed according to the alignment corresponding to each AL2PDCCH candidate in the order of occupancy0-occasion3; the PDCCH candidate is mapped to the AL1, and the mapping is performed according to the corresponding occasion of the AL1 PDCCH candidate, and the occupation0- The order mapping of occasion3.
  • the PDCCH candidate value that can be mapped is currently 24, the PDCCH candidate mapping of the AL2 in the USS set s is performed, and then the PDCCH candidate of the AL1 is mapped, and after mapping to the occasion1, the number of CCEs of the channel estimation of the terminal and/or Or the number of PDCCH blind detections reaches a threshold, and the mapping of PDCCH candidates is terminated.
  • the mapping effect can be seen in Figure 8 (shaded is the mapped PDCCH candidate).
  • the second rule is: mapping all PDCCH candidates that need to be mapped in the previous aggregation level according to the aggregation level from high to low, and then mapping PDCCH candidates to the next aggregation level; for one mapping PDCCH candidate aggregation level, based on interleaving
  • the PDCCH monitors the time index sequence, and maps all PDCCH candidates of the aggregation level in the USS set s at the PDCCH monitoring time.
  • the index of the PDCCH monitoring time index obtained by the interleaving matrix is 0, 2, 1, and 3.
  • the digital number of the PDCCH candidate set in FIG. 9 indicates the order in which the PDCCH candidates are mapped.
  • the PDCCH candidate is mapped to the AL2, and the mapping is performed in the order of occupancy0-occasion2-occasion1-occasion3 according to the alignment corresponding to each AL2PDCCH candidate in the mapping, and the PDCCH candidate is mapped to the AL1, and the mapping corresponds to each AL1 PDCCH candidate.
  • the PDCCH candidate value that can be mapped is currently 24, the PDCCH candidate mapping of the AL2 in the USS set s is performed, and then the PDCCH candidate of the AL1 is mapped, and after mapping to the occasion 2, the number of CCEs of the channel estimation of the terminal and/or Or the number of PDCCH blind detections reaches a threshold, and the mapping of PDCCH candidates is terminated.
  • the mapping effect can be seen in FIG. 9 (the PDCCH candidate with the shadow is mapped), and the PDCCH candidates of the AL1 in the occupancy1 and the occasion3 are not mapped.
  • the mapped PDCCH candidate needs to ensure that the channel estimation capability and/or the number of blind detections of the terminal are not exceeded.
  • the PDCCH blind detection of the terminal is restricted to the PDCCH candidate set corresponding to the mapped PDCCH candidate.
  • This embodiment further exemplifies the solution of the present disclosure on the basis of the fifth embodiment.
  • the base station configures a user-specific search space set for the terminal, and includes a first set of user-specific search space sets and a second set of user-specific search space sets.
  • the PDCCH candidates are mapped in the first set of user-specific search space sets using the first rule; the PDCCH candidates are mapped in the second set of user-specific search space sets using the second rule.
  • the PDCCH candidates of the second user-specific search space set in the second set of user-specific search space sets are divided into a first set of PDCCH candidates and a second set of PDCCH candidates.
  • the first set of PDCCH candidates is composed of one PDCCH candidate corresponding to the highest aggregation level at all PDCCH monitoring times in one slot of one second user-specific search space set.
  • the first set of PDCCH candidates corresponds to four PDCCH candidates numbered 1-4;
  • the second set of PDCCH candidates is one PDCCH candidate in one slot of one second user-specific search space set, except A set of all PDCCH candidates except PDCCH candidates.
  • the second set of PDCCH candidates corresponds to 28 PDCCH candidates other than the four PDCCH candidates numbered 1 to 4.
  • the first rule is used when mapping PDCCH candidates.
  • the first rule is: mapping, for the user-specific search space set in the first set of user-specific search space sets, all PDCCH candidates in the user-specific search space set on one time slot; that is, the first set for one time slot
  • the PDCCH candidates in one search space set in the search space set are either all mapped or none mapped.
  • the mapping PDCCH candidate uses the second rule.
  • the second rule is: mapping the PDCCH candidate in the first set of PDCCH candidates using the third rule; mapping the PDCCH candidate in the second set of PDCCH candidates using the fourth rule.
  • the third rule is that, based on the interleaved PDCCH monitoring time index sequence, a first set of PDCCH candidates are sequentially mapped at the PDCCH monitoring time. According to this rule, as shown in FIG. 10, four PDCCH candidates are mapped in the first set of PDCCH candidates, and are mapped in the order of numbers 1-4.
  • the fourth rule is to map all the second sets of PDCCH candidates at the PDCCH monitoring time based on the interleaved PDCCH monitoring time index sequence.
  • the second set of PDCCH candidates are mapped in the order of numbers 5-8. If the PDCCH candidate value that can be currently mapped is 18, mapping the first set of PDCCH candidates is continued, and then mapping the second set of PDCCH candidates. When the second set of PDCCH candidates are mapped, the mapping is performed in the order of occupancy0-occasion2-occasion1-occasion3. After mapping to the occasion2, the CCE number of the channel estimation and/or the number of PDCCH blind detections of the terminal reach the threshold value, and the mapping of the PDCCH candidates is terminated. The mapping effect can be seen in FIG. 10 (the shaded ones are mapped PDCCH candidates), and the second set of PDCCH candidates corresponding to numbers 7 and 8 are not mapped.
  • the inter-interleaved PDCCH monitoring time index may be obtained by using the PDCCH monitoring time index according to the interleaving matrix of inputting 2 rows and reading the PDCCH monitoring time index in columns.
  • the interleaved PDCCH monitoring time index is sorted to 0, 2, 1, and 3.
  • all the PDCCH candidates in the common search space set are mapped first, and then the PDCCH candidates in the user-specific search space set that need to be mapped before the UUS set corresponding to FIG. 10 are mapped, and then the UUS set corresponding to FIG. 10 is mapped.
  • the mapped PDCCH candidate needs to ensure that the channel estimation capability (CCE processing threshold) and/or the blind detection number capability (PDCCH candidate processing threshold) of the terminal are not exceeded.
  • the base station selects one or more PDCCH candidates on the selected mapped PDCCH candidate to carry the downlink control information as the PDCCH channel, and sends the downlink control information to the terminal.
  • the terminal determines a plurality of user-specific search space sets, and includes a first set of user-specific search space sets and a second set of user-specific search space sets.
  • the PDCCH candidates are mapped in the first set of user-specific search space sets using the first rule; the PDCCH candidates are mapped in the second set of user-specific search space sets using the second rule.
  • the PDCCH candidates of the second user-specific search space set in the second set of user-specific search space sets are divided into a first set of PDCCH candidates and a second set of PDCCH candidates.
  • the first set of PDCCH candidates is composed of one PDCCH candidate corresponding to the highest aggregation level at all PDCCH monitoring times in one slot of one second user-specific search space set.
  • the first set of PDCCH candidates corresponds to four PDCCH candidates numbered 1-4;
  • the second set of PDCCH candidates is one PDCCH candidate in one slot of one second user-specific search space set, except A set of all PDCCH candidates except PDCCH candidates.
  • the second set of PDCCH candidates corresponds to 28 PDCCH candidates other than the four PDCCH candidates numbered 1 to 4.
  • the first rule is used when mapping PDCCH candidates.
  • the first rule is: mapping, for the user-specific search space set in the first set of user-specific search space sets, all PDCCH candidates in the user-specific search space set on one time slot; that is, the first set for one time slot
  • the PDCCH candidates in one search space set in the search space set are either all mapped or none mapped.
  • the mapping PDCCH candidate uses the second rule.
  • the second rule is: mapping the PDCCH candidate in the first set of PDCCH candidates using the third rule; mapping the PDCCH candidate in the second set of PDCCH candidates using the fourth rule.
  • the third rule is that, based on the interleaved PDCCH monitoring time index sequence, a first set of PDCCH candidates are sequentially mapped at the PDCCH monitoring time. According to this rule, as shown in FIG. 10, four PDCCH candidates are mapped in the first set of PDCCH candidates, and are mapped in the order of numbers 1-4.
  • the fourth rule is to map all the second sets of PDCCH candidates at the PDCCH monitoring time based on the interleaved PDCCH monitoring time index sequence.
  • the second set of PDCCH candidates are mapped in the order of numbers 5-8. If the PDCCH candidate value that can be currently mapped is 18, mapping the first set of PDCCH candidates is continued, and then mapping the second set of PDCCH candidates.
  • the second set of PDCCH candidates are mapped and mapped according to the order of the occasion 0-occasion2-occasion1-occasion3. After mapping to the occasion2, the CCE number of the channel estimation and/or the number of PDCCH blind detections of the terminal reach a threshold value, and the mapping of the PDCCH candidates is terminated.
  • the mapping effect can be seen in FIG. 10 (the shaded ones are mapped PDCCH candidates), and the second set of PDCCH candidates corresponding to numbers 7 and 8 are not mapped.
  • the inter-interleaved PDCCH monitoring time index may be obtained by using the PDCCH monitoring time index according to the interleaving matrix of inputting 2 rows and reading the PDCCH monitoring time index in columns.
  • the interleaved PDCCH monitoring time index is sorted to 0, 2, 1, and 3.
  • all the PDCCH candidates in the common search space set are mapped first, and then the PDCCH candidates in the user-specific search space set that need to be mapped before the UUS set corresponding to FIG. 10 are mapped, and then the UUS set corresponding to FIG. 10 is mapped.
  • the mapped PDCCH candidate needs to ensure that the channel estimation capability and/or the number of blind detections of the terminal are not exceeded.
  • the PDCCH blind detection of the terminal is restricted to the PDCCH candidate set corresponding to the mapped PDCCH candidate.
  • This embodiment further exemplifies the solution of the present disclosure on the basis of the fifth embodiment.
  • the base station configures a user-specific search space set for the terminal, and includes a first set of user-specific search space sets and a second set of user-specific search space sets.
  • the PDCCH candidates are mapped in the first set of user-specific search space sets using the first rule; the PDCCH candidates are mapped in the second set of user-specific search space sets using the second rule.
  • the PDCCH candidates of the second user-specific search space set in the second set of user-specific search space sets are divided into a first set of PDCCH candidates and a second set of PDCCH candidates.
  • the first set of PDCCH candidates is composed of one PDCCH candidate corresponding to the highest aggregation level at all PDCCH monitoring times in one slot of one second user-specific search space set.
  • the first set of PDCCH candidates corresponds to four PDCCH candidates numbered 1-4;
  • the second set of PDCCH candidates is one PDCCH candidate in one slot of one second user-specific search space set, except A set of all PDCCH candidates except PDCCH candidates.
  • the second set of PDCCH candidates corresponds to 28 PDCCH candidates other than the four PDCCH candidates numbered 1 to 4.
  • the first rule is used when mapping PDCCH candidates.
  • the first rule is: mapping, for the user-specific search space set in the first set of user-specific search space sets, all PDCCH candidates in the user-specific search space set on one time slot; that is, the first set for one time slot
  • the PDCCH candidates in one search space set in the search space set are either all mapped or none mapped.
  • the mapping PDCCH candidate uses the second rule.
  • the second rule is: mapping the PDCCH candidate in the first set of PDCCH candidates using the third rule; mapping the PDCCH candidate in the second set of PDCCH candidates using the fourth rule.
  • the third rule is that, based on the interleaved PDCCH monitoring time index sequence, a first set of PDCCH candidates are sequentially mapped at the PDCCH monitoring time. According to this rule, as shown in FIG. 10, four PDCCH candidates are mapped in the first set of PDCCH candidates, and are mapped in the order of numbers 1-4.
  • the fourth rule is that all second PDCCH candidates in the user-specific search space set on one time slot are mapped; that is, for the second set of PDCCH candidates belonging to the user-specific search space set in one time slot, all mappings are performed, or All are not mapped.
  • the second set of PDCCH candidates (ie, PDCCH candidates corresponding to number 5) are either mapped or not mapped.
  • the inter-interleaved PDCCH monitoring time index may be obtained by using the PDCCH monitoring time index according to the interleaving matrix of inputting 2 rows and reading the PDCCH monitoring time index in columns.
  • the interleaved PDCCH monitoring time index is sorted to 0, 2, 1, and 3.
  • all the PDCCH candidates in the common search space set are mapped first, and then the PDCCH candidates in the user-specific search space set that need to be mapped before the UUS set corresponding to FIG. 11 are mapped, and then the UUS set corresponding to FIG. 11 is mapped.
  • the mapped PDCCH candidate needs to ensure that the channel estimation capability (CCE processing threshold) and/or the blind detection number capability (PDCCH candidate processing threshold) of the terminal are not exceeded.
  • the base station selects one or more PDCCH candidates on the selected mapped PDCCH candidate to carry the downlink control information as the PDCCH channel, and sends the downlink control information to the terminal.
  • the mapped PDCCH candidate needs to ensure that the channel estimation capability and/or the number of blind detections of the terminal are not exceeded.
  • the PDCCH blind detection of the terminal is restricted to the PDCCH candidate set corresponding to the mapped PDCCH candidate.
  • the terminal determines a plurality of user-specific search space sets, and includes a first set of user-specific search space sets and a second set of user-specific search space sets.
  • the PDCCH candidates are mapped in the first set of user-specific search space sets using the first rule; the PDCCH candidates are mapped in the second set of user-specific search space sets using the second rule.
  • the PDCCH candidates of the second user-specific search space set in the second set of user-specific search space sets are divided into a first set of PDCCH candidates and a second set of PDCCH candidates.
  • the first set of PDCCH candidates is composed of one PDCCH candidate corresponding to the highest aggregation level at all PDCCH monitoring times in one slot of one second user-specific search space set.
  • the first set of PDCCH candidates corresponds to four PDCCH candidates numbered 1-4;
  • the second set of PDCCH candidates is one PDCCH candidate in one slot of one second user-specific search space set, except A set of all PDCCH candidates except PDCCH candidates.
  • the second set of PDCCH candidates corresponds to 28 PDCCH candidates other than the four PDCCH candidates numbered 1 to 4.
  • the first rule is used when mapping PDCCH candidates.
  • the first rule is: mapping, for the user-specific search space set in the first set of user-specific search space sets, all PDCCH candidates in the user-specific search space set on one time slot; that is, the first set for one time slot
  • the PDCCH candidates in one search space set in the search space set are either all mapped or none mapped.
  • the mapping PDCCH candidate uses the second rule.
  • the second rule is: mapping the PDCCH candidate in the first set of PDCCH candidates using the third rule; mapping the PDCCH candidate in the second set of PDCCH candidates using the fourth rule.
  • the third rule is that, based on the interleaved PDCCH monitoring time index sequence, a first set of PDCCH candidates are sequentially mapped at the PDCCH monitoring time. According to this rule, as shown in FIG. 10, four PDCCH candidates are mapped in the first set of PDCCH candidates, and are mapped in the order of numbers 1-4.
  • the fourth rule is that all second PDCCH candidates in the user-specific search space set on one time slot are mapped; that is, for the second set of PDCCH candidates belonging to the user-specific search space set in one time slot, all mappings are performed, or All are not mapped.
  • the second set of PDCCH candidates (ie, PDCCH candidates corresponding to number 5) are either mapped or not mapped.
  • the inter-interleaved PDCCH monitoring time index may be obtained by using the PDCCH monitoring time index according to the interleaving matrix of inputting 2 rows and reading the PDCCH monitoring time index in columns.
  • the interleaved PDCCH monitoring time index is sorted to 0, 2, 1, and 3.
  • all the PDCCH candidates in the common search space set are mapped first, and then the PDCCH candidates in the user-specific search space set that need to be mapped before the UUS set corresponding to FIG. 11 are mapped, and then the UUS set corresponding to FIG. 11 is mapped.
  • FIG. 20 is a candidate channel mapping apparatus 20 according to Embodiment 11 of the present disclosure, including: a user-specific search space set first determining module 201 and a PDCCH candidate first mapping module 202.
  • the candidate channel mapping device 20 can be applied to a base station.
  • the user-specific search space set first determining module 201 is configured to determine a user-specific search space set of the terminal.
  • the user-specific search space set includes a first set of user-specific search space sets and/or a second set of user-specific search space sets.
  • the first set of user-specific search space sets should contain one or more first user-specific search space sets; the second set of user-specific search space sets should contain one or more second user-specific search spaces. set.
  • a user-specific search space set is a first user-specific search space set or a second user-specific search space set.
  • a user-specific search space set having a number of PDCCH monitoring moments equal to 1 in one slot is determined as a first user-specific search space set; a user-specific search space in which the number of PDCCH monitoring moments in one slot is greater than 1
  • the collection is determined to be a second user-specific search space collection.
  • the number of PDCCH monitoring moments in one slot is equal to 1 or the PDDCH monitoring period is greater than 1 slot.
  • the user-specific search space set is determined as the first user-specific search space set; the PDCCH monitoring time will be in one slot.
  • the number of user-specific search spaces whose number is greater than 1, and whose PDDCH monitoring period is equal to 1 time slot is determined to be the second user-specific search space set.
  • the PDCCH candidate first mapping module 202 is configured to map the PDCCH candidate in the first set of user-specific search space sets using the first mapping rule; and map the PDCCH candidate in the second set of user-specific search space sets using the second mapping rule.
  • mapping PDCCH candidates in a common search space set means that a PDCCH candidate that is finally to be reserved is selected in a common search space set.
  • the PDCCH candidates in one user-specific search space set may include one or more aggregation level PDCCH candidates.
  • the PDCCH candidate finally mapped in this embodiment is the PDCCH candidate that is finally reserved.
  • the mapped PDCCH candidate may be used to carry downlink control information.
  • the first selection rule includes: when mapping the PDCCH candidate from the first user-specific search space set in the first set of user-specific search space sets, the PDCCH candidates in the first user-specific search space set are all Mapping, or not mapping all PDCCH candidates in the first user-specific search space set. For example, in the example of USS set 2 in FIG. 3, all the two PDCCH candidates in the USS set 2 are all mapped, or the two PDCCH candidates in the USS set 2 are all discarded, that is, they are not mapped.
  • the second selection rule includes: when mapping the PDCCH candidate from the second user-specific search space set in the second set of user-specific search space sets, the PDCCH candidate in the second user-specific search space set is according to Mapping at least one of the ways described:
  • Manner 1 The PDCCH candidates in the second user-specific search space set are mapped according to the order of the PDCCH monitoring time index.
  • the PDCCH candidates in the second user-specific search space set are PDCCH candidates mapped according to the PDCCH monitoring time index from the largest to the smallest, or the PDCCH candidates in the second user-specific search space set are small according to the PDCCH monitoring time index.
  • the PDCCH candidate mapping is selected in a large order.
  • the PDCCH candidates in the second user-specific search space set select the PDCCH candidate mapping according to the order of the PDCCH monitoring time index interleaving.
  • all PDCCH candidates corresponding to one PDCCH monitoring time index may be mapped after mapping all PDCCH candidates corresponding to one PDCCH monitoring time index.
  • one PDCCH monitoring time includes one or more PDCCH time domain symbols, and PDCCH start symbols of different PDCCH monitoring moments are different, and overlapping PDCCH time domain symbols may exist between different PDCCH candidate monitoring moments.
  • the specific implementation is similar to the first method. Specifically, the PDCCH candidate in the second user-specific search space set selects the PDCCH candidate mapping according to the PDCCH start symbol index from the largest to the smallest; or the PDCCH candidate in the second user-specific search space set is based on the PDCCH start symbol index.
  • the PDCCH candidate mapping is selected in a small to large order; or, the PDCCH candidates in the second user-specific search space set select the PDCCH candidate mapping according to the order of the PDCCH start symbol index interleaving.
  • mapping when mapping is performed according to the order of the PDCCH start symbol index, all PDCCH candidates corresponding to one PDCCH start symbol index may be mapped, and then all PDCCH candidates corresponding to the next PDCCH start symbol index are mapped. .
  • the PDCCH candidate in the second user-specific search space set selects the PDCCH candidate mapping according to the aggregation level of the PDCCH candidate from high to low.
  • mapping is performed, all PDCCH candidates corresponding to one aggregation level mapping may be mapped, and then all PDCCH candidates corresponding to the next aggregation level may be mapped.
  • the PDCCH candidate first mapping module 202 may also use the mode 1 and the mode 3 to map the PDCCH candidate from the second user-specific search space set in the second set of user-specific search space sets;
  • the aggregation level of the PDCCH candidate is in the order of high to low, and the PDCCH candidates are mapped in different aggregation levels in turn; in the mapping, all the PDCCH candidates corresponding to one aggregation level mapping are mapped, and then all the mappings corresponding to the next aggregation level are mapped.
  • PDCCH candidate may also use the mode 1 and the mode 3 to map the PDCCH candidate from the second user-specific search space set in the second set of user-specific search space sets;
  • the aggregation level of the PDCCH candidate is in the order of high to low, and the PDCCH candidates are mapped in different aggregation levels in turn; in the mapping, all the PDCCH candidates corresponding to one aggregation level mapping are mapped, and then all the mappings corresponding to the
  • the PDCCH monitoring time index is in descending order, or the PDCCH monitoring time index is from small to large.
  • the PDCCH candidate in the aggregation level is mapped in the order of the PDCCH monitoring time index interleaving.
  • all PDCCH candidate mappings of the aggregation level corresponding to one PDCCH monitoring time index are mapped.
  • all the PDCCH candidates of the aggregation level corresponding to the next PDCCH monitoring time index are mapped.
  • the PDCCH candidate first mapping module 202 may also use the mode 2 and the mode 3 to map the PDCCH candidates from the second set of user-specific search spaces in the second set of user-specific search space sets. Similar to the manner in which the PDCCH candidate mapping is mapped from the second user-specific search space set in the second set of user-specific search space sets, and the aggregation level of the PDCCH candidates may be sequentially in the order of high to low.
  • the second selection rule may further be: dividing the PDCCH candidate in the second user-specific search space set into the first set of PDCCH candidates and the second set of PDCCH candidates, and then using the third selection rule in the first set.
  • the PDCCH candidate is mapped in the PDCCH candidate; the PDCCH candidate is mapped in the second set of PDCCH candidates using the fourth selection rule.
  • the PDCCH candidate first mapping module 202 may divide the first set of PDCCH candidates and the second set of PDCCH candidates in the second user-specific search space set in the following manner:
  • the first set of PDCCH candidates can be selected in the following manner:
  • the first set of PDCCH candidates may be selected from PDCCH candidates in the second user-specific search space set according to the PDCCH monitoring time index order.
  • the PDCCH candidate first mapping module 202 may select n (n is greater than or equal to 1) PDCCH candidates to form the first set of PDCCH candidates from the PDCCH candidates in the second user-specific search space set corresponding to the PDCCH monitoring time index. .
  • the first set of PDCCH candidates may be selected from PDCCH candidates in the second user-specific search space set according to the PDCCH monitoring time index and the aggregation level of the PDCCH candidate.
  • the PDCCH candidate first mapping module 202 may select n (n is greater than or equal to 1) PDCCH candidate with the highest aggregation level from the PDCCH candidates in the second user-specific search space set corresponding to the PDCCH monitoring time index. A set of PDCCH candidates.
  • the first set of PDCCH candidates may be selected from PDCCH candidates in the second set of user-specific search spaces according to a PDCCH start symbol index.
  • the PDCCH candidate first mapping module 202 may select n (n is greater than or equal to 1) PDCCH candidates from the PDCCH candidates in the second user-specific search space set corresponding to the PDCCH start symbol index.
  • the first set of PDCCH candidates is formed. It should be understood that the aggregation level corresponding to the PDCCH candidate selected in the PDCCH candidate corresponding to each PDCCH start symbol index is not required, and may be any aggregation level.
  • the first set of PDCCH candidates may be selected from PDCCH candidates in the second set of user-specific search spaces according to a PDCCH start symbol index and an aggregation level of PDCCH candidates.
  • the PDCCH candidate first mapping module 202 may select n (n is greater than or equal to 1) aggregation levels from the PDCCH candidates in the second user-specific search space set corresponding to the PDCCH start symbol index.
  • the highest PDCCH candidate constitutes the first set of PDCCH candidates.
  • n may take 1 or 2.
  • the PDCCH candidate first mapping module 202 may use the remaining PDCCH candidates except the first set of PDCCH candidates in the second user-specific search space set as the second set of PDCCH candidates. For example, as shown in FIG. 10, all PDCCHs except for the four PDCCHs in the first set of PDCCH candidates constitute a second set of PDCCH candidates.
  • the third selection rule includes: the first set of PDCCH candidates are selected according to at least one of the following manners:
  • Manner 4 The first set of PDCCH candidates are mapped according to the order of the PDCCH monitoring time index.
  • the first set of PDCCH candidates may map the PDCCH candidates according to the PDCCH monitoring time index from the largest to the smallest.
  • the first set of PDCCH candidates maps PDCCH candidates according to a PDCCH monitoring time index from small to large.
  • the first set of PDCCH candidates maps PDCCH candidates according to an order of PDCCH monitoring time index interleaving. It should be understood that, when mapping is performed, all PDCCH candidates in the first set of PDCCH candidates corresponding to one PDCCH monitoring time index may be mapped, and then mapped in the first set of PDCCH candidates corresponding to the next PDCCH monitoring time index. All PDCCH candidates.
  • Manner 5 The first set of PDCCH candidates are mapped according to the order of the PDCCH start symbol index.
  • the first set of PDCCH candidates maps the PDCCH candidates according to the PDCCH start symbol index from the largest to the smallest; or the first set of PDCCH candidates maps the PDCCH according to the PDCCH start symbol index from small to large. Candidates; or, the first set of PDCCH candidates map PDCCH candidates according to an order of PDCCH start symbol index interleaving. It should be understood that, after mapping, all the PDCCH candidates in the first set of PDCCH candidates corresponding to one PDCCH start symbol index may be mapped, and then the first set of PDCCH candidates corresponding to the next PDCCH start symbol index may be mapped. All PDCCH candidates in .
  • Manner 6 The first set of PDCCH candidates are mapped according to the order of aggregation levels of PDCCH candidates.
  • the first set of PDCCH candidates may be mapped to the PDCCH candidates according to the aggregation level of the PDCCH candidates.
  • the mapping is performed, all the PDCCH candidates in the first set of PDCCH candidates corresponding to one aggregation level mapping may be mapped. And mapping all PDCCH candidates in the first set of PDCCH candidates corresponding to the next aggregation level.
  • the first set of PDCCH candidates maps PDCCH candidates according to an order of aggregation of PDCCH candidates from high to low and PDCCH monitoring time index interleaving. After performing mapping, all PDCCH candidates in the first set of PDCCH candidates corresponding to one aggregation level mapping may be mapped, and then all PDCCH candidates in the first set of PDCCH candidates corresponding to the next aggregation level may be mapped; at the same aggregation level. After the first set of PDCCH candidates are mapped, all the PDCCH candidates in the first set of PDCCH candidates corresponding to the PDCCH monitoring time index are mapped, and then the aggregation level corresponding to the next PDCCH monitoring time index is mapped. All PDCCH candidates in the first set of PDCCH candidates.
  • the first set of PDCCH candidates may also map PDCCH candidates according to the order of aggregation of PDCCH candidates from high to low and the order of PDCCH monitoring time indices from large to small. Or mapping the PDCCH candidates in descending order according to the aggregation level of the PDCCH candidates from high to low and the PDCCH monitoring time index.
  • the first set of PDCCH candidates may be selected in preference to the second set of PDCCH candidates. That is, after mapping the PDCCH candidates in the first set of PDCCH candidates, the PDCCH candidates are mapped in the second set of PDCCH candidates.
  • the fourth selection rule includes: the second set of PDCCH candidates are selected according to at least one of the following manners:
  • Manner 7 The second set of PDCCH candidates are all selected as mapped PDCCH candidates.
  • Manner 8 The second set of PDCCH candidates map the PDCCH candidates according to the order of the PDCCH monitoring time index.
  • the second set of PDCCH candidates maps the PDCCH candidates according to the PDCCH monitoring time index from the largest to the smallest; or the second set of PDCCH candidates maps the PDCCH candidates according to the PDCCH monitoring time index from small to large; or, the second set The PDCCH candidate maps PDCCH candidates according to the order of PDCCH monitoring time index interleaving.
  • all PDCCH candidates in the second set of PDCCH candidates corresponding to one PDCCH monitoring time index may be mapped, and then all PDCCH candidates in the second set of PDCCH candidates corresponding to the next PDCCH monitoring time index may be mapped.
  • the PDCCH candidates When the PDCCH candidates are mapped in the order of the PDCCH monitoring time index interleaving, the PDCCH candidates may be mapped only in the order of the PDCCH monitoring time index interleaving.
  • the PDCCH candidate first mapping module 202 maps the PDCCH candidates in the user-specific search space set
  • the pre-predictions on each carrier are in the current time slot according to each user-specific search space set. Set the mapping order to map.
  • the candidate channel mapping device 20 should know in advance the processing threshold of the terminal for the number of PDCCH candidate monitoring, and know the processing threshold of the terminal for the CCE.
  • the candidate channel mapping device 20 further includes a first threshold value control module 203.
  • the first threshold value control module 203 is configured to control a processing threshold value of the PDCCH candidate monitoring times corresponding to the total PDCCH candidate of the mapping is less than or equal to a processing threshold of the PDCCH candidate monitoring times of the terminal, and the number of CCEs corresponding to the mapped total PDCCH candidate is smaller than It is equal to the CCE processing threshold of the terminal.
  • the mapped total PDCCH candidate in the embodiment includes the PDCCH candidate mapped in the user-specific search space set and the PDCCH candidate mapped in the common search space set.
  • the candidate channel mapping device 20 selects one or more PDCCH candidates on the mapped PDCCH candidate as the PDCCH channel carrying the downlink control information, and sends the downlink to the terminal. Control information.
  • the embodiment further provides a candidate channel mapping device 22, including: a user-specific search space set second determining module 221 and a PDCCH candidate second mapping module 222.
  • the candidate channel mapping device 22 can be applied to a terminal.
  • the user-specific search space set second determining module 221 is configured to determine a user-specific search space set configured by the base station.
  • the user-specific search space set includes a first set of user-specific search space sets and/or a second set of user-specific search space sets.
  • the first set of user-specific search space sets should contain one or more first user-specific search space sets; the second set of user-specific search space sets should contain one or more second user-specific search spaces. set.
  • a user-specific search space set is a first user-specific search space set or a second user-specific search space set.
  • a user-specific search space set having a number of PDCCH monitoring moments equal to 1 in one slot is determined as a first user-specific search space set; a user-specific search space in which the number of PDCCH monitoring moments in one slot is greater than 1
  • the collection is determined to be a second user-specific search space collection.
  • the number of PDCCH monitoring moments in one slot is equal to 1 or the PDDCH monitoring period is greater than 1 slot.
  • the user-specific search space set is determined as the first user-specific search space set; the PDCCH monitoring time will be in one slot.
  • the number of user-specific search spaces whose number is greater than 1, and whose PDDCH monitoring period is equal to 1 time slot is determined to be the second user-specific search space set.
  • the PDCCH candidate second mapping module 222 is configured to map the PDCCH candidate in the first set of user-specific search space sets using the first mapping rule; and map the PDCCH candidate in the second set of user-specific search space sets using the second mapping rule.
  • mapping PDCCH candidates in a common search space set means that a PDCCH candidate that is finally to be reserved is selected in a common search space set.
  • the PDCCH candidates in one user-specific search space set may include one or more aggregation level PDCCH candidates.
  • the PDCCH candidate finally mapped in this embodiment is the PDCCH candidate that is finally reserved.
  • the mapped PDCCH candidate may be used to carry downlink control information.
  • the first selection rule includes: when mapping the PDCCH candidate from the first user-specific search space set in the first set of user-specific search space sets, the PDCCH candidates in the first user-specific search space set are all Mapping, or not mapping all PDCCH candidates in the first user-specific search space set.
  • the USS set 2 in FIG. 3 is used to map all the PDCCH candidates in the USS set 2, or all the two PDCCH candidates in the USS set 2 are discarded, that is, they are not mapped.
  • the second selection rule includes: when mapping the PDCCH candidate from the second user-specific search space set in the second set of user-specific search space sets, the PDCCH candidate in the second user-specific search space set is according to Mapping at least one of the ways described:
  • Manner 1 The PDCCH candidates in the second user-specific search space set are mapped according to the order of the PDCCH monitoring time index.
  • the PDCCH candidates in the second user-specific search space set are PDCCH candidates mapped according to the PDCCH monitoring time index from the largest to the smallest, or the PDCCH candidates in the second user-specific search space set are small according to the PDCCH monitoring time index.
  • the PDCCH candidate mapping is selected in a large order.
  • the PDCCH candidates in the second user-specific search space set select the PDCCH candidate mapping according to the order of the PDCCH monitoring time index interleaving.
  • all PDCCH candidates corresponding to one PDCCH monitoring time index may be mapped after mapping all PDCCH candidates corresponding to one PDCCH monitoring time index.
  • one PDCCH monitoring time includes one or more PDCCH time domain symbols, and PDCCH start symbols of different PDCCH monitoring moments are different, and overlapping PDCCH time domain symbols may exist between different PDCCH candidate monitoring moments.
  • the specific implementation is similar to the first method. Specifically, the PDCCH candidate in the second user-specific search space set selects the PDCCH candidate mapping according to the PDCCH start symbol index from the largest to the smallest; or the PDCCH candidate in the second user-specific search space set is based on the PDCCH start symbol index.
  • the PDCCH candidate mapping is selected in a small to large order; or, the PDCCH candidates in the second user-specific search space set select the PDCCH candidate mapping according to the order of the PDCCH start symbol index interleaving.
  • mapping when mapping is performed according to the order of the PDCCH start symbol index, all PDCCH candidates corresponding to one PDCCH start symbol index may be mapped, and then all PDCCH candidates corresponding to the next PDCCH start symbol index are mapped. .
  • the PDCCH candidate in the second user-specific search space set selects the PDCCH candidate mapping according to the aggregation level of the PDCCH candidate from high to low.
  • mapping is performed, all PDCCH candidates corresponding to one aggregation level mapping may be mapped, and then all PDCCH candidates corresponding to the next aggregation level may be mapped.
  • the PDCCH candidate second mapping module 222 may also use the mode 1 and the mode 3 to map the PDCCH candidate from the second user-specific search space set in the second set of user-specific search space sets;
  • the aggregation level of the PDCCH candidate is in the order of high to low, and the PDCCH candidates are mapped in different aggregation levels in turn; in the mapping, all the PDCCH candidates corresponding to one aggregation level mapping are mapped, and then all the mappings corresponding to the next aggregation level are mapped.
  • PDCCH candidate may also use the mode 1 and the mode 3 to map the PDCCH candidate from the second user-specific search space set in the second set of user-specific search space sets;
  • the aggregation level of the PDCCH candidate is in the order of high to low, and the PDCCH candidates are mapped in different aggregation levels in turn; in the mapping, all the PDCCH candidates corresponding to one aggregation level mapping are mapped, and then all the mappings corresponding to the
  • the PDCCH monitoring time index is in descending order, or the PDCCH monitoring time index is from small to large.
  • the PDCCH candidate in the aggregation level is mapped in the order of the PDCCH monitoring time index interleaving.
  • all PDCCH candidate mappings of the aggregation level corresponding to one PDCCH monitoring time index are mapped.
  • all the PDCCH candidates of the aggregation level corresponding to the next PDCCH monitoring time index are mapped.
  • the PDCCH candidate second mapping module 222 may also use the mode 2 and the mode 3 to map the PDCCH candidates from the second set of user-specific search spaces in the second set of user-specific search space sets. Similar to the manner in which the PDCCH candidate mapping is mapped from the second user-specific search space set in the second set of user-specific search space sets, and the aggregation level of the PDCCH candidates may be sequentially in the order of high to low.
  • the second selection rule may further be: dividing the PDCCH candidate in the second user-specific search space set into the first set of PDCCH candidates and the second set of PDCCH candidates, and then using the third selection rule in the first set.
  • the PDCCH candidate is mapped in the PDCCH candidate; the PDCCH candidate is mapped in the second set of PDCCH candidates using the fourth selection rule.
  • the PDCCH candidate second mapping module 222 may divide the first set of PDCCH candidates and the second set of PDCCH candidates in the second user-specific search space set in the following manner:
  • the first set of PDCCH candidates can be selected in the following manner:
  • the first set of PDCCH candidates may be selected from PDCCH candidates in the second user-specific search space set according to the PDCCH monitoring time index order.
  • the PDCCH candidate second mapping module 222 may select n (n is greater than or equal to 1) PDCCH candidates to form the first set of PDCCH candidates from the PDCCH candidates in the second user-specific search space set corresponding to the PDCCH monitoring time index. .
  • the first set of PDCCH candidates may be selected from PDCCH candidates in the second user-specific search space set according to the PDCCH monitoring time index and the aggregation level of the PDCCH candidate.
  • the PDCCH candidate second mapping module 222 may select n (n is greater than or equal to 1) PDCCH candidate with the highest aggregation level from the PDCCH candidates in the second user-specific search space set corresponding to the PDCCH monitoring time index. A set of PDCCH candidates.
  • the first set of PDCCH candidates may be selected from PDCCH candidates in the second set of user-specific search spaces according to a PDCCH start symbol index.
  • the PDCCH candidate second mapping module 222 may select n (n is greater than or equal to 1) PDCCH candidates from the PDCCH candidates in the second user-specific search space set corresponding to the PDCCH start symbol index.
  • the first set of PDCCH candidates is formed. It should be understood that the aggregation level corresponding to the PDCCH candidate selected in the PDCCH candidate corresponding to each PDCCH start symbol index is not required, and may be any aggregation level.
  • the first set of PDCCH candidates may be selected from PDCCH candidates in the second set of user-specific search spaces according to a PDCCH start symbol index and an aggregation level of PDCCH candidates.
  • the PDCCH candidate second mapping module 222 may select n (n is greater than or equal to 1) aggregation levels from the PDCCH candidates in the second user-specific search space set corresponding to the PDCCH start symbol index.
  • the highest PDCCH candidate constitutes the first set of PDCCH candidates.
  • n may take 1 or 2.
  • the PDCCH candidate second mapping module 222 may use the remaining PDCCH candidates except the first set of PDCCH candidates in the second user-specific search space set as the second set of PDCCH candidates.
  • the third selection rule includes: the first set of PDCCH candidates are selected according to at least one of the following manners:
  • Manner 4 The first set of PDCCH candidates are mapped according to the order of the PDCCH monitoring time index.
  • the first set of PDCCH candidates may map the PDCCH candidates according to the PDCCH monitoring time index from the largest to the smallest.
  • the first set of PDCCH candidates maps PDCCH candidates according to a PDCCH monitoring time index from small to large.
  • the first set of PDCCH candidates maps PDCCH candidates according to an order of PDCCH monitoring time index interleaving. It should be understood that, when mapping is performed, all PDCCH candidates in the first set of PDCCH candidates corresponding to one PDCCH monitoring time index may be mapped, and then mapped in the first set of PDCCH candidates corresponding to the next PDCCH monitoring time index. All PDCCH candidates.
  • Manner 5 The first set of PDCCH candidates are mapped according to the order of the PDCCH start symbol index.
  • the first set of PDCCH candidates maps the PDCCH candidates according to the PDCCH start symbol index from the largest to the smallest; or the first set of PDCCH candidates maps the PDCCH according to the PDCCH start symbol index from small to large. Candidates; or, the first set of PDCCH candidates map PDCCH candidates according to an order of PDCCH start symbol index interleaving. It should be understood that, after mapping, all the PDCCH candidates in the first set of PDCCH candidates corresponding to one PDCCH start symbol index may be mapped, and then the first set of PDCCH candidates corresponding to the next PDCCH start symbol index may be mapped. All PDCCH candidates in .
  • Manner 6 The first set of PDCCH candidates are mapped according to an order of aggregation levels of PDCCH candidates
  • the first set of PDCCH candidates may be mapped to the PDCCH candidates according to the aggregation level of the PDCCH candidates.
  • the mapping is performed, all the PDCCH candidates in the first set of PDCCH candidates corresponding to one aggregation level mapping may be mapped. And mapping all PDCCH candidates in the first set of PDCCH candidates corresponding to the next aggregation level.
  • the first set of PDCCH candidates maps PDCCH candidates according to an order of aggregation of PDCCH candidates from high to low and PDCCH monitoring time index interleaving. After performing mapping, all PDCCH candidates in the first set of PDCCH candidates corresponding to one aggregation level mapping may be mapped, and then all PDCCH candidates in the first set of PDCCH candidates corresponding to the next aggregation level may be mapped; at the same aggregation level. After the first set of PDCCH candidates are mapped, all the PDCCH candidates in the first set of PDCCH candidates corresponding to the PDCCH monitoring time index are mapped, and then the aggregation level corresponding to the next PDCCH monitoring time index is mapped. All PDCCH candidates in the first set of PDCCH candidates.
  • the first set of PDCCH candidates may also map PDCCH candidates according to the order of aggregation of PDCCH candidates from high to low and the order of PDCCH monitoring time indices from large to small. Or mapping the PDCCH candidates in descending order according to the aggregation level of the PDCCH candidates from high to low and the PDCCH monitoring time index.
  • the first set of PDCCH candidates may be selected in preference to the second set of PDCCH candidates. That is, after mapping the PDCCH candidates in the first set of PDCCH candidates, the PDCCH candidates are mapped in the second set of PDCCH candidates.
  • the fourth selection rule includes: the second set of PDCCH candidates are selected according to at least one of the following manners:
  • Manner 7 The second set of PDCCH candidates are all selected as mapped PDCCH candidates.
  • Manner 8 The second set of PDCCH candidates map the PDCCH candidates according to the order of the PDCCH monitoring time index.
  • the second set of PDCCH candidates maps the PDCCH candidates according to the PDCCH monitoring time index from the largest to the smallest; or the second set of PDCCH candidates maps the PDCCH candidates according to the PDCCH monitoring time index from small to large; or, the second set The PDCCH candidate maps PDCCH candidates according to the order of PDCCH monitoring time index interleaving.
  • all PDCCH candidates in the second set of PDCCH candidates corresponding to one PDCCH monitoring time index may be mapped, and then all PDCCH candidates in the second set of PDCCH candidates corresponding to the next PDCCH monitoring time index may be mapped.
  • the PDCCH candidates When the PDCCH candidates are mapped in the order of the PDCCH monitoring time index interleaving, the PDCCH candidates may be mapped only in the order of the PDCCH monitoring time index interleaving.
  • the PDCCH candidate second mapping module 222 maps the PDCCH candidates in the user-specific search space set
  • the pre-predictions on each carrier are in the current time slot according to each user-specific search space set. Set the mapping order to map.
  • the candidate channel mapping device 22 should know in advance the processing threshold of the terminal for the number of PDCCH candidate monitoring, and know the processing threshold of the terminal for the CCE.
  • the candidate channel mapping device 22 further includes a second threshold value control module 223.
  • the second threshold value control module 223 is configured to control a processing threshold value of the PDCCH candidate monitoring times corresponding to the mapped total PDCCH candidate is less than or equal to a processing threshold of the PDCCH candidate monitoring times of the terminal, and the mapped total PDCCH candidate corresponds to a smaller number of CCEs. It is equal to the CCE processing threshold of the terminal.
  • the mapped total PDCCH candidate in the embodiment includes the PDCCH candidate mapped in the user-specific search space set and the PDCCH candidate mapped in the common search space set.
  • a candidate channel mapping apparatus by configuring, for a terminal, a user-specific search space set including a first set of user-specific search space sets and/or a second set of user-specific search space sets, and then using the first selection rule
  • the PDCCH candidates are mapped in the first set of user-specific search space sets, and the PDCCH candidates are mapped in the second set of user-specific search space sets by using the second selection rule, so as to filter the PDCCH candidates.
  • the processing threshold value and the CCE processing threshold value of the PDCCH candidate monitoring times of the terminal are combined in the screening process, so that the PDCCH candidate that is finally reserved in one time slot is within the capability range supported by the UE when the terminal processes the terminal.
  • FIG. 24 is a candidate channel mapping apparatus 24 according to Embodiment 12 of the present disclosure, which includes a user-specific search space set third determining module 241 and a PDCCH candidate third mapping module 242.
  • the candidate channel mapping means 24 can be applied to a base station.
  • the user-specific search space set third determining module 241 is configured to determine a third set of user-specific search space sets of the terminal.
  • the third set of user-specific search space sets includes one or more third user-specific search space sets.
  • the PDCCH candidate third mapping module 242 is configured to map the PDCCH candidate in the third set of user-specific search space sets according to the carrier index and the search space set index.
  • the third set of user-specific search space sets includes one or more third user-specific search space sets.
  • One or more third user-specific search space sets in the third set of user-specific search space sets include all PDCCH candidates on one time slot.
  • the terminal only monitors the PDCCH in the user-specific search space set on the initial active downlink bandwidth portion and the active downlink bandwidth portion. Therefore, the third set of user-specific search space sets in this embodiment may include: All user-specific search space sets of the terminal on the downlink bandwidth portion and/or the initial activation downlink bandwidth portion are activated on the slot.
  • mapping the PDCCH candidates in the third set of user-specific search space sets according to the carrier index and the search space set index includes:
  • the PDCCH candidate mappings in the third set of user-specific search space sets on each carrier are sequentially performed in descending order of carrier index.
  • the PDCCH candidate mappings in the third user-specific search space set are sequentially sequenced according to the search space set index from low to high.
  • the PDCCH candidate third mapping module 242 mapping the PDCCH candidates in the third set of user-specific search space sets according to the carrier index and the search space set index in the current time slot includes:
  • the PDCCH candidate third mapping module 242 sequentially alternately maps PDCCH candidates in the third set of user-specific search space sets on each carrier in order of carrier index from low to high; on the same carrier, the PDCCH candidate third mapping module 242
  • the PDCCH candidate mappings in the third user-specific search space set are sequentially sequentially arranged in descending order of the search space set index.
  • the PDCCH candidate third mapping module 242 sequentially maps PDCCH candidates in a third user-specific search space set corresponding to each search space set index according to a search space set index from low to high; corresponding to the same search space set index
  • a plurality of third user-specific search space sets sequentially map PDCCH candidates in each third user-specific search space set according to a carrier index from low to high.
  • the PDCCH candidate third mapping module 242 may, when the PDCCH candidate is mapped in the third user-specific search space set in the order of the search space set index from low to high, may be: according to the search space set index In the low-to-high order, after all the PDCCH candidates that need to be mapped are mapped to the third user-specific search space set corresponding to one search space set index, the PDCCH candidates are mapped to the third user-specific search space set corresponding to one search space set index. .
  • mapping the PDCCH candidate in the third set of user-specific search space sets according to the carrier index and the search space set index includes at least one of the following manners:
  • Manner 9 Mapping PDCCH candidates in a third set of user-specific search space sets directly according to a carrier index and a search space set index.
  • Manner 10 mapping PDCCH candidates in the third set of user-specific search space sets according to a carrier index, a search space set index, and a slot index.
  • Mode 11 mapping PDCCH candidates in a third set of user-specific search space sets according to a carrier index, a search space set index, and a carrier type.
  • the candidate channel mapping device 24 further includes a third threshold value control module 243.
  • the third threshold value control module 243 is configured to control a processing threshold value of the PDCCH candidate monitoring times corresponding to the mapped total PDCCH candidate is less than or equal to a processing threshold of the PDCCH candidate monitoring times of the terminal, and the mapped total PDCCH candidate corresponds to a smaller number of CCEs. It is equal to the CCE processing threshold of the terminal.
  • the mapped total PDCCH candidate in the embodiment includes the PDCCH candidate mapped in the user-specific search space set and the PDCCH candidate mapped in the common search space set.
  • the base station selects one or more PDCCH candidates on the mapped PDCCH candidate, and sends the downlink control information to the terminal as the PDCCH channel carrying the downlink control information.
  • FIG. 26 is a candidate channel mapping apparatus 26 according to Embodiment 12 of the present disclosure, which includes a user-specific search space set fourth determining module 261 and a PDCCH candidate fourth mapping module 262.
  • the candidate channel mapping means 26 can be applied to the terminal.
  • the user-specific search space set fourth determining module 261 is configured to determine a third set of user-specific search space sets of the terminal.
  • the third set of user-specific search space sets includes one or more third user-specific search space sets.
  • the PDCCH candidate fourth mapping module 262 is configured to map the PDCCH candidate in the third set of user-specific search space sets according to the carrier index and the search space set index.
  • the third set of user-specific search space sets includes one or more third user-specific search space sets.
  • One or more third user-specific search space sets in the third set of user-specific search space sets include all PDCCH candidates on one time slot.
  • the terminal only detects the PDCCH in the user-specific search space set on the initial downlink bandwidth portion and the active downlink bandwidth portion. Therefore, the third set of user-specific search space sets in this embodiment may include: All of the user-specific search space sets of the terminal on the downstream bandwidth portion and/or the initial activation downlink bandwidth portion are activated.
  • mapping the PDCCH candidates in the third set of user-specific search space sets according to the carrier index and the search space set index includes:
  • the PDCCH candidate mappings in the third set of user-specific search space sets on each carrier are sequentially performed in descending order of carrier index.
  • the PDCCH candidate mappings in the third user-specific search space set are sequentially sequenced according to the search space set index from low to high.
  • the PDCCH candidate fourth mapping module 262 mapping the PDCCH candidates in the third set of user-specific search space sets according to the carrier index and the search space set index in the current slot includes:
  • the PDCCH candidate fourth mapping module 262 sequentially alternately maps PDCCH candidates in the third set of user-specific search space sets on each carrier in order of carrier index from low to high; on the same carrier, the PDCCH candidate fourth mapping module 262
  • the PDCCH candidate mappings in the third user-specific search space set are sequentially sequentially arranged in descending order of the search space set index.
  • the PDCCH candidate fourth mapping module 262 sequentially maps the PDCCH candidates in the third user-specific search space set corresponding to each search space set index according to the search space set index from low to high; corresponding to the same search space set index
  • a plurality of third user-specific search space sets sequentially map PDCCH candidates in each third user-specific search space set according to a carrier index from low to high.
  • the PDCCH candidate fourth mapping module 262 may sequentially map the PDCCH candidates in each third user-specific search space set according to the search space set index from low to high, which may be: according to the search space set index In the low-to-high order, after all the PDCCH candidates that need to be mapped are mapped to the third user-specific search space set corresponding to one search space set index, the PDCCH candidates are mapped to the third user-specific search space set corresponding to one search space set index. .
  • mapping the PDCCH candidate in the third set of user-specific search space sets according to the carrier index and the search space set index includes at least one of the following manners:
  • Manner 9 Mapping PDCCH candidates in a third set of user-specific search space sets directly according to a carrier index and a search space set index.
  • Manner 10 mapping PDCCH candidates in the third set of user-specific search space sets according to a carrier index, a search space set index, and a slot index.
  • Mode 11 mapping PDCCH candidates in a third set of user-specific search space sets according to a carrier index, a search space set index, and a carrier type.
  • the candidate channel mapping device 26 further includes a fourth threshold value control module 263.
  • the fourth threshold value control module 263 is configured to control a processing threshold value of the PDCCH candidate monitoring times corresponding to the total PDCCH candidate that is mapped to be less than or equal to the processing threshold of the PDCCH candidate monitoring times of the terminal, and the number of CCEs corresponding to the mapped total PDCCH candidate is smaller than It is equal to the CCE processing threshold of the terminal.
  • the mapped total PDCCH candidate in the embodiment includes the PDCCH candidate mapped in the user-specific search space set and the PDCCH candidate mapped in the common search space set.
  • the candidate channel mapping apparatus by configuring a third set of user-specific search space sets for the terminal, and mapping PDCCH candidates in the third set of user-specific search space sets according to the carrier index and the search space set index, The PDCCH candidates are filtered.
  • the PDCCH candidate processing threshold value of the terminal is combined with the CCE processing threshold value, so as to ensure that the PDCCH candidate finally retained in one slot and the finally retained CCE number required for channel estimation are supported by the UE.
  • FIG. 28 is a candidate channel mapping apparatus 28 according to Embodiment 13 of the present disclosure, including: a user-specific search space set first determining unit 281, a PDCCH candidate first mapping unit 282, and a PDCCH candidate second mapping unit. 283.
  • the candidate channel mapping device 28 can be applied to a base station.
  • the user-specific search space set first determining unit 281 is configured to determine a user-specific search space set of the terminal; the user-specific search space set includes a first set of user-specific search space sets and/or a second set of users. a particular set of search spaces; the first set of user-specific search space sets comprising one or more first user-specific search space sets; the second set of user-specific search space sets comprising one or more second user-specific search space sets .
  • a PDCCH candidate first mapping unit 282 configured to map a PDCCH candidate in a first set of user-specific search space sets by using a first mapping rule
  • the PDCCH candidate second mapping unit 283 is configured to map the PDCCH candidate in the second set of user-specific search space sets by using the second mapping rule.
  • the first selection rule includes: when mapping the PDCCH candidate from the first user-specific search space set in the first set of user-specific search space sets, the PDCCH candidates in the first user-specific search space set are all Mapping, or not mapping all PDCCH candidates in the first user-specific search space set.
  • the USS set 2 in FIG. 3 is used to map all the PDCCH candidates in the USS set 2, or all the two PDCCH candidates in the USS set 2 are discarded, that is, they are not mapped.
  • the second selection rule includes: when mapping the PDCCH candidate from the second user-specific search space set in the second set of user-specific search space sets, the PDCCH candidate in the second user-specific search space set is according to Mapping at least one of the ways described:
  • Manner 1 The PDCCH candidates in the second user-specific search space set are mapped according to the order of the PDCCH monitoring time index.
  • the second selection rule may further be: dividing the PDCCH candidate in the second user-specific search space set into the first set of PDCCH candidates and the second set of PDCCH candidates, and then using the third selection rule in the first set.
  • the PDCCH candidate is mapped in the PDCCH candidate; the PDCCH candidate is mapped in the second set of PDCCH candidates using the fourth selection rule.
  • the PDCCH candidate second mapping unit 283 includes a PDCCH candidate first mapping sub-unit 2831 and a PDCCH candidate second mapping sub-unit 2832.
  • the PDCCH candidate first mapping sub-unit 2831 is configured to map the PDCCH candidate in the first set of PDCCH candidates using the third selection rule.
  • the PDCCH candidate second mapping sub-unit 2832 is configured to map the PDCCH candidate in the second set of PDCCH candidates using the fourth selection rule.
  • the third selection rule includes: the first set of PDCCH candidates are selected according to at least one of the following manners:
  • Manner 4 The first set of PDCCH candidates are mapped according to the order of the PDCCH monitoring time index.
  • Manner 5 The first set of PDCCH candidates are mapped according to the order of the PDCCH start symbol index.
  • Manner 6 The first set of PDCCH candidates are mapped according to the order of aggregation levels of PDCCH candidates.
  • the fourth selection rule includes: the second set of PDCCH candidates are selected according to at least one of the following manners:
  • Manner 7 The second set of PDCCH candidates are all selected as mapped PDCCH candidates.
  • Manner 8 The second set of PDCCH candidates map the PDCCH candidates according to the order of the PDCCH monitoring time index.
  • the candidate channel mapping device 28 further includes a first threshold value control unit 284.
  • the first threshold value control unit 284 is configured to control a processing threshold value of the PDCCH candidate monitoring times corresponding to the total PDCCH candidate that is mapped to be less than or equal to a processing threshold of the PDCCH candidate monitoring times of the terminal, and the number of CCEs corresponding to the mapped total PDCCH candidate is smaller than It is equal to the CCE processing threshold of the terminal.
  • the mapped total PDCCH candidate in the embodiment includes the PDCCH candidate mapped in the user-specific search space set and the PDCCH candidate mapped in the common search space set.
  • the embodiment further provides a candidate channel mapping apparatus 31, including: a user-specific search space set second determining unit 311, a PDCCH candidate third mapping unit 312, and a PDCCH candidate fourth mapping unit 313.
  • the candidate channel mapping device 28 can be applied to a base station.
  • the user-specific search space set second determining unit 311 is configured to determine a user-specific search space set of the terminal; the user-specific search space set includes a first set of user-specific search space sets and/or a second set of users. a particular set of search spaces; the first set of user-specific search space sets comprising one or more first user-specific search space sets; the second set of user-specific search space sets comprising one or more second user-specific search space sets .
  • the PDCCH candidate second mapping unit 312 is configured to map the PDCCH candidate in the first set of user-specific search space sets by using the first mapping rule.
  • the PDCCH candidate fourth mapping unit 313 is configured to map the PDCCH candidate in the second set of user-specific search space sets by using the second mapping rule.
  • the first selection rule includes: when mapping the PDCCH candidate from the first user-specific search space set in the first set of user-specific search space sets, the PDCCH candidates in the first user-specific search space set are all Mapping, or not mapping all PDCCH candidates in the first user-specific search space set.
  • the second selection rule includes: when mapping the PDCCH candidate from the second user-specific search space set in the second set of user-specific search space sets, the PDCCH candidate in the second user-specific search space set is according to Mapping at least one of the ways described:
  • Manner 1 The PDCCH candidates in the second user-specific search space set are mapped according to the order of the PDCCH monitoring time index.
  • the second selection rule may further be: dividing the PDCCH candidate in the second user-specific search space set into the first set of PDCCH candidates and the second set of PDCCH candidates, and then using the third selection rule in the first set.
  • the PDCCH candidate is mapped in the PDCCH candidate; the PDCCH candidate is mapped in the second set of PDCCH candidates using the fourth selection rule.
  • the PDCCH candidate fourth mapping unit 313 includes a PDCCH candidate third mapping sub-unit 3131 and a PDCCH candidate fourth mapping sub-unit 3132.
  • the PDCCH candidate third mapping sub-unit 3131 is configured to map the PDCCH candidate in the first set of PDCCH candidates using the third selection rule.
  • the PDCCH candidate fourth mapping sub-unit 3132 is configured to map the PDCCH candidate in the second set of PDCCH candidates using the fourth selection rule.
  • the third selection rule includes: the first set of PDCCH candidates are selected according to at least one of the following manners:
  • Manner 4 The first set of PDCCH candidates are mapped according to the order of the PDCCH monitoring time index.
  • Manner 5 The first set of PDCCH candidates are mapped according to the order of the PDCCH start symbol index.
  • Manner 6 The first set of PDCCH candidates are mapped according to the order of aggregation levels of PDCCH candidates.
  • the fourth selection rule includes: the second set of PDCCH candidates are selected according to at least one of the following manners:
  • Manner 7 The second set of PDCCH candidates are all selected as mapped PDCCH candidates.
  • Manner 8 The second set of PDCCH candidates map the PDCCH candidates according to the order of the PDCCH monitoring time index.
  • the candidate channel mapping device 31 further includes a second threshold value control unit 314.
  • the second threshold value control unit 314 is configured to control a processing threshold value of the PDCCH candidate monitoring times corresponding to the total PDCCH candidate of the mapping is less than or equal to a processing threshold of the PDCCH candidate monitoring times of the terminal, and the number of CCEs corresponding to the mapped total PDCCH candidate is smaller than It is equal to the CCE processing threshold of the terminal.
  • the mapped total PDCCH candidate in the embodiment includes the PDCCH candidate mapped in the user-specific search space set and the PDCCH candidate mapped in the common search space set.
  • a candidate channel mapping apparatus by configuring, for a terminal, a user-specific search space set including a first set of user-specific search space sets and/or a second set of user-specific search space sets, and then using the first selection rule
  • the PDCCH candidates are mapped in the first set of user-specific search space sets, and the PDCCH candidates are mapped in the second set of user-specific search space sets by using the second selection rule, so as to filter the PDCCH candidates.
  • the processing threshold value and the CCE processing threshold value of the PDCCH candidate monitoring times of the terminal are combined in the screening process, so that the PDCCH candidate that is finally reserved in one time slot is within the capability range supported by the UE when the terminal processes the terminal.
  • Embodiment 14 is a diagrammatic representation of Embodiment 14:
  • the embodiment further provides a base station, as shown in FIG. 34, which includes a first processor 341, a first memory 342, and a first communication bus 343. among them:
  • the first communication bus 343 is configured to implement connection communication between the first processor 341 and the first memory 342; the first processor 341 is configured to execute one or more first programs stored in the first memory 342 to implement the above The first method of the first candidate channel mapping method according to any one of the first to tenth embodiments; the first processor is further configured to execute one or more second programs stored in the first memory The steps of the second candidate channel mapping method according to any one of the first to tenth embodiments described above are implemented.
  • the embodiment further provides a terminal, as shown in FIG. 35, which includes a second processor 351, a second memory 352, and a second communication bus 353.
  • the second communication bus 353 is used to implement the second processor 351. Connection communication with the second memory 352; the second processor 351 is configured to execute one or more third programs stored in the second memory 352 to implement any of the first to tenth embodiments described above The steps of the first candidate channel mapping method.
  • the second processor 351 is configured to execute one or more fourth programs stored in the second memory 352 to implement the steps of the second candidate channel mapping method according to any one of the foregoing first to tenth embodiments. .
  • the embodiment further provides a storage medium, such as a floppy disk, an optical disk, a hard disk, a flash memory, a USB flash drive, a CF card, an SD card, an MMC card, etc., in which a computer executable instruction is stored, the computer executable
  • the instructions may be executed by one or more processors to implement the steps of the candidate channel mapping method of any of the first to tenth embodiments. I will not repeat them here.
  • modules or steps of the present disclosure can be implemented by a general computing device, which can be concentrated on a single computing device or distributed over a network composed of multiple computing devices.
  • they may be implemented by program code executable by a computing device such that they may be stored in a computer storage medium (ROM/RAM, diskette, optical disk) by a computing device, and in some cases
  • ROM/RAM, diskette, optical disk a computer storage medium
  • the steps shown or described may be performed in a different order than that herein, or they may be separately fabricated into individual integrated circuit modules, or a plurality of the modules or steps may be implemented as a single integrated circuit module. Therefore, the present disclosure is not limited to any specific combination of hardware and software.

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

本文提供了一种候选信道映射方法、装置、基站、终端及存储介质。所述方法包括：确定终端的用户特定搜索空间集合，用户特定搜索空间集合包含第一套用户特定搜索空间集合和第二套用户特定搜索空间集合中的至少之一；在用户特定搜索空间集合包含第一套用户特定搜索空间集合的情况下，使用第一映射规则在第一套用户特定搜索空间集合中映射物理下行控制信道PDCCH候选；在用户特定搜索空间集合包含第二套用户特定搜索空间集合的情况下，使用第二映射规则在第二套用户特定搜索空间集合中映射PDCCH候选；在用户特定搜索空间集合包含第一套用户特定搜索空间集合和第二套用户特定搜索空间集合的情况下，使用第一映射规则在第一套用户特定搜索空间集合中映射PDCCH候选以及使用第二映射规则在第二套用户特定搜索空间集合中映射PDCCH候选。

Description

候选信道映射方法、装置、基站、终端及存储介质
本公开要求在2018年05月11日提交中国专利局、申请号为201810451265.1的中国专利申请的优先权，该申请的全部内容通过引用结合在本公开中。
技术领域
本公开涉及通信技术领域，尤其涉及一种候选信道映射方法、装置、基站、终端及存储介质。
背景技术
在LTE(Long Term Evolution，长期演进)和5G NR中，下行控制信息通过物理下行控制信道(Physical Downlink Control Channel，PDCCH)承载。通常情况下，基站会在多个PDCCH候选中至少选择一个PDCCH候选作为最终的PDCCH信道。终端并不知道基站在这多个PDCCH候选中，最终选择的是哪个/哪些PDCCH候选作为最终的PDCCH信道。因此，终端需要在多个PDCCH候选中逐一尝试PDCCH解调和译码。
对于上述多个PDCCH候选，通常分布在一个或多个聚合级别(Aggregation level，AL)上，并且，对于每个聚合级别，通常包含多个PDCCH候选。需要知晓的是，聚合级别是指一个PDCCH候选包含的控制信道单元(Control Channel Element，CCE)的数目。例如，如果聚合级别为4，那么该聚合级别上的每个PDCCH候选都是由4个CCE组成的。从前述描述可以看出，PDCCH候选数目越多，终端需要盲检测的PDCCH候选数目就越多，因此，需要信道估计的CCE数目也就越多。
事实上与PDCCH相关的定义中，存在搜索空间集合这一定义，搜索空间集合主要用于确定PDCCH可以使用那些聚合级别，以及在特定的聚合级别上的PDCCH候选数目，以及PDCCH周期和时域位置等信息。一个搜索空间集合中可以包括多个PDCCH候选，而不同的搜索空间集合其周期也可以不同，这就使得可能存在多个搜索空间集合位于同一个时隙上的情况，例如参见图1所示，时隙11位置和时隙12位置即同时存在有搜索空间集合1和搜索空间集合2。但是当多个搜索空间集合位于同一个时隙上时，该时隙上总的PDCCH候选数目将会明显增加，因此PDCCH的盲检测数目，以及需要进行信道估计CCE的数目也会明显增加。从而，各个搜索空间上的PDCCH候选数目和/或需要进行信道估计的CCE数目，可能会超出用户设备(User equipment，UE)支持的能力范围之外。而为解决这一问题，一种可行的思路是对一个时隙内的PDCCH候选进行 筛选保留，从而使得一个时隙上最终保留的PDCCH候选的数目和/或最终保留的需要进行信道估计的CCE数目处于UE支持的能力范围之内。基于这一可行思路，就需要提供一种行之有效的对PDCCH候选进行筛选保留的机制。
发明内容
本公开实施例提供一种候选信道映射方法、装置、基站、终端及存储介质，主要解决的技术问题是：提供对PDCCH候选进行筛选保留的机制。
为解决上述技术问题，本公开实施例提供了一种候选信道映射方法，包括：
确定终端的用户特定搜索空间集合，所述用户特定搜索空间集合包含第一套用户特定搜索空间集合和/或第二套用户特定搜索空间集合；
使用第一映射规则在第一套用户特定搜索空间集合中映射PDCCH候选；
使用第二映射规则在第二套用户特定搜索空间集合中映射PDCCH候选；
所述第一套用户特定搜索空间集合包含一个或多个第一用户特定搜索空间集合；
所述第二套用户特定搜索空间集合包含一个或多个第二用户特定搜索空间集合。
本公开实施例还提供一种候选信道映射方法，包括：
基站确定终端的第三套用户特定搜索空间集合，所述第三套用户特定搜索空间集合中包含一个或多个第三用户特定搜索空间集合；
根据载波索引和搜索空间集合索引在所述第三套用户特定搜索空间集合中映射PDCCH候选。
本公开实施例还提供一种候选信道映射装置，包括：
用户特定搜索空间集合第一确定模块，用于确定终端的用户特定搜索空间集合；所述用户特定搜索空间集合包含第一套用户特定搜索空间集合和/或第二套用户特定搜索空间集合；所述第一套用户特定搜索空间集合包含一个或多个第一用户特定搜索空间集合；所述第二套用户特定搜索空间集合包含一个或多个第二用户特定搜索空间集合；
PDCCH候选第一映射模块，用于使用第一映射规则在第一套用户特定搜索空间集合中映射PDCCH候选；以及使用第二映射规则在第二套用户特定搜索空间集合中映射PDCCH候选。
本公开实施例还提供一种候选信道映射装置，包括：
用户特定搜索空间集合第三确定模块，用于确定终端的第三套用户特定搜索空间集合，所述第三套用户特定搜索空间集合中包含一个或多个第三用户特定搜索空间集合；
PDCCH候选第三映射模块，用于根据载波索引和搜索空间集合索引在所述第三套用户特定搜索空间集合中映射PDCCH候选。
本公开实施例还提供一种候选信道映射装置，包括：
用户特定搜索空间集合第一确定单元，用于确定终端的用户特定搜索空间集合；所述用户特定搜索空间集合包含第一套用户特定搜索空间集合和/或第二套用户特定搜索空间集合；所述第一套用户特定搜索空间集合包含一个或多个第一用户特定搜索空间集合；所述第二套用户特定搜索空间集合包含一个或多个第二用户特定搜索空间集合；
PDCCH候选第一映射单元，用于使用第一映射规则在第一套用户特定搜索空间集合中映射PDCCH候选；
PDCCH候选第二映射单元，用于使用第二映射规则在第二套用户特定搜索空间集合中映射PDCCH候选。
本公开实施例还提供一种基站，包括：第一处理器、第一存储器以及第一通信总线；
所述第一通信总线用于实现所述第一处理器和第一存储器之间的连接通信；
所述第一处理器用于执行所述第一存储器中存储的一个或者多个第一程序，以实现上述的第一种候选信道映射方法的步骤；
所述第一处理器还用于执行所述第一存储器中存储的一个或者多个第二程序，以实现上述的第二种候选信道映射方法的步骤。
本公开实施例还提供一种终端，包括：第二处理器、第二存储器以及第二通信总线；
所述第二通信总线用于实现所述第二处理器和第二存储器之间的连接通信；
所述第二处理器用于执行所述第二存储器中存储的一个或者多个第三程序，以实现上述的第一种候选信道映射方法的步骤；
所述第二处理器用于执行所述第二存储器中存储的一个或者多个第四程序，以实现上述的第二种候选信道映射方法的步骤。
本公开实施例还提供一种存储介质，所述存储介质中存储有计算机可执行 指令，所述计算机可执行指令用于执行前述的任一种的候选信道映射方法。
本公开的有益效果是：
根据本公开实施例提供的候选信道映射方法、装置、基站、终端及存储介质，共提供了两套对PDCCH候选进行筛选保留的机制，其中一套通过为终端配置包含第一套用户特定搜索空间集合和/或第二套用户特定搜索空间集合的用户特定搜索空间集合(第一套用户特定搜索空间集合包含一个或多个第一用户特定搜索空间集合，第二套用户特定搜索空间集合包含一个或多个第二用户特定搜索空间集合)，再使用第一选择规则在第一套用户特定搜索空间集合中映射PDCCH候选，使用第二选择规则在第二套用户特定搜索空间集合中映射PDCCH候选，从而实现对PDCCH候选进行筛选。而另一套则通过为终端配置第三套用户特定搜索空间集合(第三套用户特定搜索空间集合中包含一个或多个第三用户特定搜索空间集合)，再根据当前时隙中的载波索引和搜索空间集合索引在第三套用户特定搜索空间集合中映射PDCCH候选，从而实现对PDCCH候选进行筛选。
附图说明
图1为相关技术中的一种多个搜索空间集合在时隙上的示意图；
图2为本公开实施例一提供的基站侧的一种候选信道映射方法的基本流程示意图；
图3为本公开各个实施例提供的一种搜索空间集合划分示意图；
图4为本公开各个实施例提供的一种用户特定搜索空间集合中的PDCCH候选映射示意图；
图5为本公开各个实施例提供的又一种用户特定搜索空间集合中的PDCCH候选映射示意图；
图6为本公开各个实施例提供的又一种用户特定搜索空间集合中的PDCCH候选映射示意图；
图7为本公开各个实施例提供的又一种用户特定搜索空间集合中的PDCCH候选映射示意图；
图8为本公开各个实施例提供的又一种用户特定搜索空间集合中的PDCCH候选映射示意图；
图9为本公开各个实施例提供的又一种用户特定搜索空间集合中的PDCCH 候选映射示意图；
图10为本公开各个实施例提供的又一种用户特定搜索空间集合中的PDCCH候选映射示意图；
图11为本公开各个实施例提供的又一种用户特定搜索空间集合中的PDCCH候选映射示意图；
图12为本公开各个实施例提供的又一种用户特定搜索空间集合中的PDCCH候选映射示意图；
图13为本公开各个实施例提供的一种载波上的用户特定搜索空间集合映射示意图；
图14为本公开各个实施例提供的又一种载波上的用户特定搜索空间集合映射示意图；
图15为本公开实施例一提供的终端侧的一种候选信道映射方法的基本流程示意图；
图16为本公开实施例二提供的基站侧的一种候选信道映射方法的基本流程示意图；
图17为本公开各个实施例提供的又一种载波上的用户特定搜索空间集合映射示意图；
图18为本公开各个实施例提供的一种多时隙上的载波上用户特定搜索空间集合映射示意图；
图19为本公开实施例二提供的终端侧的一种候选信道映射方法的基本流程示意图；
图20为本公开实施例十一提供的一种可以应用于基站中的候选信道映射装置的结构示意图；
图21为本公开实施例十一提供的一种可以应用于基站中的候选信道映射装置的具体结构示意图；
图22为本公开实施例十一提供的一种可以应用于终端中的候选信道映射装置的结构示意图；
图23为本公开实施例十一提供的一种可以应用于终端中的候选信道映射装置的具体结构示意图；
图24为本公开实施例十二提供的一种可以应用于基站中的候选信道映射装置的结构示意图；
图25为本公开实施例十二提供的一种可以应用于基站中的候选信道映射装置的具体结构示意图；
图26为本公开实施例十二提供的一种可以应用于终端中的候选信道映射装置的结构示意图；
图27为本公开实施例十二提供的一种可以应用于终端中的候选信道映射装置的具体结构示意图；
图28为本公开实施例十三提供的一种可以应用于基站中的候选信道映射装置的结构示意图；
图29为本公开实施例十三提供的一种PDCCH候选第二映射单元的结构示意图；
图30为本公开实施例十三提供的一种可以应用于基站中的候选信道映射装置的更具体的结构示意图；
图31为本公开实施例十三提供的一种可以应用于终端中的候选信道映射装置的结构示意图；
图32为本公开实施例十三提供的一种PDCCH候选第四映射单元的结构示意图；
图33为本公开实施例十三提供的一种可以应用于基站中的候选信道映射装置的更具体的结构示意图；
图34为本公开实施例十四提供的一种基站结构示意图；
图35为本公开实施例十四提供的一种终端结构示意图。
具体实施方式
现在将参考附图更详细地描述本公开构思的各个实施例。但是，本公开构思可被以很多不同的形式具体实施，并且不应被理解为仅限于所示出的实施例。相反，提供这些实施例以使本公开将会透彻和完整，并且将向本领域技术人员全面地传达本公开构思的范围。贯穿上面描述和附图，相同的参考数字和标记代表相同或者类似的元素。
应当理解的是，尽管这里可能使用术语第一、第二等来描述各种元件，但是这些元件不应被这些术语限制。这些术语只被用来将一个元件与另一个加以区分。例如，第一信号可以被称为第二信号，并且类似地，第二信号可以被称为第一信号而不偏离本公开的教导。
这里使用的术语仅仅是为了描述特定实施例，并非旨在限制本公开构思。 如这里所使用的，单数形式“一”、“一个”和“该”预期也包括复数形式，除非上下文清楚地另有指示。还应当理解的是，术语“包含”或“包括”在本说明书中被使用时，规定了存在所陈述的特征、区域、部分、步骤、操作、元件，和/或部件，但是不排除存在或者添加一个或更多个其他的特征、区域、部分、步骤、操作、元件、部件，和/或其组合。
除非另外定义，否则这里使用的所有术语(包括技术和科学术语)具有和本公开所属技术领域的技术人员通常理解的相同的含义。还应当理解的是，例如在常用词典中定义的那些的术语应该被解释为具有与其在相关技术和/或本公开的上下文中的含义相符的含义，并且将不会以理想化或者过于形式化的意义解释，除非这里明确地如此定义。
下面通过具体实施方式结合附图对本公开实施例作进一步详细说明。
实施例一：
参见图2所示，图2为本公开实施例一提供的基站侧的一种候选信道映射方法的基本流程示意图，包括：
S201：确定终端的用户特定搜索空间集合。
在本实施例中，用户特定搜索空间集合包含第一套用户特定搜索空间集合和/或第二套用户特定搜索空间集合。
在本实施例中，第一套用户特定搜索空间集合应当包含有一个或多个第一用户特定搜索空间集合；第二套用户特定搜索空间集合应当包含有一个或多个第二用户特定搜索空间集合。
其中，在确定一个用户特定搜索空间集合为第一用户特定搜索空间集合还是为第二用户特定搜索空间集合时，可以遵循以下两种规则来进行确定：
其一：将在一个时隙内PDCCH监测时刻的数目等于1的用户特定搜索空间集合确定为第一用户特定搜索空间集合；将在一个时隙内PDCCH监测时刻的数目大于1的用户特定搜索空间集合确定为第二用户特定搜索空间集合。
其二：将在一个时隙内PDCCH监测时刻的数目等于1或PDDCH监测周期大于1个时隙的用户特定搜索空间集合确定为第一用户特定搜索空间集合；将在一个时隙内PDCCH监测时刻的数目大于1，且PDDCH监测周期等于1个时隙的用户特定搜索空间集合确定为第二用户特定搜索空间集合。
例如参见图3所示，图3中包含一个公共搜索空间集合(Common search space set，CSS set)和三个用户特定搜索空间集合(UE specific search space set， USS set)。其中：用户特定搜索空间集合USS set 1包含两个PDCCH监测时刻，即occasion 0和occasion 1，PDCCH监测时刻的数目大于1，因此USS set 1对应属于第二套用户特定搜索空间集合32；而用户特定搜索空间集合USS set 2和用户特定搜索空间集合USS set 3仅包含一个PDCCH监测时刻，即occasion 0，因此USS set 2和USS set 3对应属于第一套用户特定搜索空间集合31。即图3中第一套用户特定搜索空间集合包含用户特定搜索空间集合USS set 2和用户特定搜索空间集合USS set 3，第二套用户特定搜索空间集合包含用户特定搜索空间集合USS set 1。
这里需要说明的是，基站除了会为终端配置用户特定搜索空间集合外，还会配置公共搜索空间集合。通常而言，基站会先配置公共搜索空间集合，然后才配置用户特定搜索空间集合。通常而言，公共搜索空间集合中的所有PDCCH候选均会被映射，所有公共搜索空间集合中的PDCCH候选映射，在用户特定搜索空间集合的PDCCH映射之前进行。
应当理解的是，本实施例中所述的映射即是指的选择。例如在公共搜索空间集合中映射PDCCH候选即是指的：在公共搜索空间集合中选择出最终要保留的PDCCH候选。
还需要说明的是，一个用户特定搜索空间集合中的PDCCH候选可以包括一个或一个以上聚合级别的PDCCH候选。例如图3中USS set 1在PDCCH监测时刻occasion 0和occasion1上，均分别包含2个聚合级别为1(即AL为1)的PDCCH候选和4个聚合级别为2(即AL为2)的PDCCH候选。应当明晰的是，一个聚合级别为1的PDCCH候选是由1个控制信道单元CCE组成，而一个聚合级别为2的PDCCH候选，由2个CCE组成。相对应的，一个聚合级别为4的PDCCH候选是由4个控制信道单元CCE组成。
在实际应用中，基站为终端配置用户特定搜索空间集合可能存在以下实际情况：其一：受基站实际情况的限制，某些基站为其归属终端配置的用户特定搜索空间集合属于第一套用户特定搜索空间集合，而某些基站为其归属的终端配置的特定搜索空间集合属于第二套用户特定搜索空间集合。其二：一个基站可以同时为多个终端配置多个用户特定搜索空间集合，此时基站可以根据配置需求给某些终端配置第一套用户特定搜索空间集合，给某些终端配置第二套用户特定搜索空间集合，给某些终端同时配置第一套用户特定搜索空间集合和第二套用户特定搜索空间集合；其三：基站为每一个终端配置的多个用户特定搜索空间集合，都包含有第一套用户特定搜索空间集合和第二套用户特定搜索空间集合。综上，在本实施例中，基站为终端配置用户特定搜索空间集合的具体情况实质有三种，即分别是仅为终端配置第一套用户特定搜索空间集合；或者 仅为终端配置第二套用户特定搜索空间集合；或者，同时为所述终端配置第一套用户特定搜索空间集合和第二套用户特定搜索空间集合。
S202：使用第一选择规则在第一套用户特定搜索空间集合中映射PDCCH候选；使用第二选择规则在第二套用户特定搜索空间集合中映射PDCCH候选。
应当理解的是，本实施例中最终映射的PDCCH候选即是最终保留的PDCCH候选。映射的PDCCH候选可以用于承载下行控制信息。
在本实施例中，第一选择规则包括：在从第一套用户特定搜索空间集合中的第一用户特定搜索空间集合中映射PDCCH候选时，将第一用户特定搜索空间集合中的PDCCH候选全部映射，或者将第一用户特定搜索空间集合中的所有PDCCH候选全部不映射。例如以图3中的USS set 2为例，则要么将USS set 2中的两个PDCCH候选全部映射，要么就将USS set 2中的两个PDCCH候选全部放弃，即都不映射。
在本实施例中，第二选择规则包括：在从第二套用户特定搜索空间集合中的第二用户特定搜索空间集合中映射PDCCH候选时，第二用户特定搜索空间集合中的PDCCH候选根据下述方式中的至少一种进行映射：
方式一：第二用户特定搜索空间集合中的PDCCH候选根据PDCCH监测时刻索引的顺序映射。
具体的，第二用户特定搜索空间集合中的PDCCH候选根据PDCCH监测时刻索引由大到小的顺序映射；例如参见图4所示：按照PDCCH监测时刻索引occasion3-occasion0的顺序依次映射，图4中，1、2、3、4分别为对应PDCCH候选集合的编号，该编号反应映射顺序，映射时按编号由低到高依次映射。
或者，第二用户特定搜索空间集合中的PDCCH候选根据PDCCH监测时刻索引由小到大的顺序映射；例如参见图5所示：按照PDCCH监测时刻索引occasion0-occasion1的顺序依次映射。图5中，1、2、3、4分别为对应PDCCH候选集合的编号，该编号反应映射顺序，映射时按编号由低到高依次映射。
或者，第二用户特定搜索空间集合中的PDCCH候选根据PDCCH监测时刻索引交织的顺序映射。例如参见图6所示：按照PDCCH监测时刻索引occasion0-occasion2-occasion1-occasion3的顺序依次映射，图6中，1、2、3、4分别为对应PDCCH候选集合的编号，该编号反应映射顺序，映射时按编号由低到高依次映射。
值得注意的是，在根据PDCCH监测时刻索引的顺序进行映射时，可以将一个PDCCH监测时刻索引对应的所有PDCCH候选映射完毕之后，才会映射下一个PDCCH监测时刻索引对应的所有PDCCH候选。
方式二：第二用户特定搜索空间集合中的PDCCH候选根据PDCCH起始符号索引的顺序映射。
应当理解的是，一个PDCCH监测时刻包括1个或多个PDCCH时域符号，不同PDCCH监测时刻的PDCCH起始符号不同，不同PDCCH候选监测时刻之间可以存在重叠的PDCCH时域符号。
在方式二中，其具体的实现方式与方式一类似。具体的，第二用户特定搜索空间集合中的PDCCH候选根据PDCCH起始符号索引由大到小的顺序映射；或者，第二用户特定搜索空间集合中的PDCCH候选根据PDCCH起始符号索引由小到大的顺序映射；或者，第二用户特定搜索空间集合中的PDCCH候选根据PDCCH起始符号索引交织的顺序映射。
值得注意的是，在根据PDCCH起始符号索引的顺序进行映射时，可以将一个PDCCH起始符号索引对应的所有PDCCH候选映射完毕之后，才会映射下一个PDCCH起始符号索引对应的所有PDCCH候选。
方式三：第二用户特定搜索空间集合中的PDCCH候选根据PDCCH候选的聚合级别的顺序映射。
具体的，第二用户特定搜索空间集合中的PDCCH候选根据PDCCH候选的聚合级别由高到低的顺序映射。在进行映射时，可以先将一个聚合级别映射对应的所有PDCCH候选映射完毕之后，再映射下一聚合级别对应的所有PDCCH候选。例如参见图7所示，在映射时，先映射AL为4的PDCCH候选，再映射AL为2的PDCCH候选，最后映射AL为1的PDCCH候选。
在本实施例中，还可以同时采用方式一和方式三从第二套用户特定搜索空间集合中的第二用户特定搜索空间集合中映射PDCCH候选。具体的，可以根据PDCCH候选的聚合级别由高到低的顺序，依次在不同聚合级别中映射PDCCH候选；在进行映射时，将一个聚合级别映射对应的所有PDCCH候选映射完毕之后，再映射下一聚合级别对应的所有PDCCH候选。应当注意的是，在同一聚合级别中，根据所述聚合级别中的所有PDCCH候选对应的PDCCH监测时刻索引，按照PDCCH监测时刻索引由大到小的顺序，或者按照PDCCH监测时刻索引由小到大的顺序，或者按照PDCCH监测时刻索引交织的顺序，映射所述聚合级别中的PDCCH候选；在同一聚合级别的PDCCH候选进行映射时，将一个PDCCH监测时刻索引对应的该聚合级别的所有PDCCH候选映射完毕之后，再映射下一个PDCCH监测时刻索引对应的该聚合级别的所有PDCCH候选。
例如参见图8所示，该第二用户特定搜索空间集合中的PDCCH候选有两个AL级别，分别为AL2和AL1，则先映射AL2，再映射AL1。在级别为AL2的 PDCCH候选中，又按照PDCCH监测时刻索引由小到大的顺序映射，在级别为AL1的PDCCH候选中，又按照PDCCH监测时刻索引由小到大的顺序映射，图8中，1-8分别为对应PDCCH候选集合的编号，该编号反应映射顺序，映射时按编号由低到高依次选择。又例如参见图9所示，该第二用户特定搜索空间集合中的PDCCH候选有两个AL级别，分别为AL2和AL1，则先映射AL2，再映射AL1。在级别为AL2的PDCCH候选中，又按照PDCCH监测时刻索引交织的顺序映射，在级别为AL1的PDCCH候选中，又按照PDCCH监测时刻索引交织的顺序映射，图9中，1-8分别为对应PDCCH候选集合的编号，该编号反应映射顺序，映射时按编号由低到高依次选择。
在本实施例中，还可以同时采用方式二和方式三从第二套用户特定搜索空间集合中的第二用户特定搜索空间集合中映射PDCCH候选。与同时采用方式一和方式三从第二套用户特定搜索空间集合中的第二用户特定搜索空间集合中映射PDCCH候选类似的，可以根据PDCCH候选的聚合级别由高到低的顺序，依次在不同聚合级别中映射PDCCH候选；在进行映射时，将一个聚合级别映射对应的所有PDCCH候选映射完毕之后，再映射下一聚合级别对应的所有PDCCH候选；而在同一聚合级别中，根据聚合级别中的所有PDCCH候选对应的PDCCH起始符号索引，按照PDCCH起始符号索引由大到小的顺序，或者按照PDCCH起始符号索引由小到大的顺序，或者按照PDCCH起始符号索引交织的顺序，映射所述聚合级别中的PDCCH候选；在同一聚合级别的PDCCH候选进行映射时，将一个PDCCH起始符号索引对应的该聚合级别的所有PDCCH候选映射完毕之后，再映射下一个PDCCH起始符号索引对应的该聚合级别的所有PDCCH候选。
在本实施例中，第二选择规则还可以是：将第二用户特定搜索空间集合中的PDCCH候选划分为第一套PDCCH候选和第二套PDCCH候选，进而使用第三选择规则在第一套PDCCH候选中映射PDCCH候选；使用第四选择规则在第二套PDCCH候选中映射PDCCH候选。
具体的，在本实施例中，可以按照以下方式来划分第二用户特定搜索空间集合中的第一套PDCCH候选和第二套PDCCH候选：
对于第一套PDCCH候选可以通过以下方式选取：
1.可以根据PDCCH监测时刻索引顺序从第二用户特定搜索空间集合中的PDCCH候选中选择出第一套PDCCH候选。
具体的，可以从所述PDCCH监测时刻索引对应的第二用户特定搜索空间集合中的PDCCH候选中，选择n(n大于等于1)个PDCCH候选构成第一套PDCCH候选。例如，参见图10所示，在occasion0-occasion3中分别选取了一个PDCCH候选，即图10中的被独立出来的四个PDCCH候选(编号1-4的四个PDCCH 候选)，则这四个PDCCH即为第一套PDCCH候选。应当理解的是，此时在occasion0-occasion3中选取的PDCCH候选所对应的聚合级别没有要求，可以是任意聚合级别的。
2.可以根据PDCCH监测时刻索引和PDCCH候选的聚合级别从第二用户特定搜索空间集合中的PDCCH候选中选择出第一套PDCCH候选。
具体的，可以从所述PDCCH监测时刻索引对应的第二用户特定搜索空间集合中的PDCCH候选中，选择n(n大于等于1)个聚合级别最高的PDCCH候选构成第一套PDCCH候选。例如，仍旧参见图10所示，occasion0-occasion3中对应的最大聚合级别均为AL2，则在occasion0-occasion3中分别选取了一个AL2级别的PDCCH候选，即图10中occasion0-occasion3中被独立出来的AL2级别的四个PDCCH(编号1-4的四个PDCCH候选)，则这四个PDCCH即为第一套PDCCH候选。
3.可以根据PDCCH起始符号索引从第二用户特定搜索空间集合中的PDCCH候选中选择出第一套PDCCH候选。
具体的，与上述1类似，可以从所述PDCCH起始符号索引对应的第二用户特定搜索空间集合中的PDCCH候选中，选择n(n大于等于1)个PDCCH候选构成第一套PDCCH候选。应当理解的是，此时在各PDCCH起始符号索引对应的PDCCH候选中选取的PDCCH候选所对应的聚合级别没有要求，可以是任意聚合级别的。
4.可以根据PDCCH起始符号索引和PDCCH候选的聚合级别从第二用户特定搜索空间集合中的PDCCH候选中选择出第一套PDCCH候选。
具体的，与上述2类似，可以从所述PDCCH起始符号索引对应的第二用户特定搜索空间集合中的PDCCH候选中，选择n(n大于等于1)个聚合级别最高的PDCCH候选构成第一套PDCCH候选。
在本实施的一种具体实施方式中，n可以取1或2。
对于第二套PDCCH候选，可以将第二用户特定搜索空间集合中除第一套PDCCH候选之外的其余PDCCH候选作为第二套PDCCH候选。例如参见图10所示，除去第一套PDCCH候选中的四个PDCCH之外剩余的所有PDCCH即构成了第二套PDCCH候选。
在本实施例中，第三选择规则包括：第一套PDCCH候选根据下述方式中的至少一种进行选择：
方式四：第一套PDCCH候选根据PDCCH监测时刻索引的顺序进行映射。
具体的，第一套PDCCH候选可以根据PDCCH监测时刻索引由大到小的顺序映射的PDCCH候选。或者，第一套PDCCH候选根据PDCCH监测时刻索引由小到大的顺序映射的PDCCH候选。或者，第一套PDCCH候选根据PDCCH监测时刻索引交织的顺序映射的PDCCH候选。应当理解的是，在进行映射时，可以将一个PDCCH监测时刻索引对应的第一套PDCCH候选中的所有PDCCH候选映射完毕之后，再映射下一个PDCCH监测时刻索引对应的第一套PDCCH候选中的所有PDCCH候选。
例如参见图10所示，第一套PDCCH候选即是根据PDCCH监测时刻索引交织的顺序从第一套PDCCH候选中映射的PDCCH候选，交织的occasion排序为occasion0-occasion2-occasion1-occasion3。图10中，1-4分别为对应PDCCH候选的编号，该编号反应映射顺序，映射时按编号由低到高依次映射。
方式五：第一套PDCCH候选根据PDCCH起始符号索引的顺序映射。
具体的，与方式四类似，第一套PDCCH候选根据PDCCH起始符号索引由大到小的顺序映射的PDCCH候选；或者，第一套PDCCH候选根据PDCCH起始符号索引由小到大的顺序映射的PDCCH候选；或者，第一套PDCCH候选根据PDCCH起始符号索引交织的顺序映射的PDCCH候选。应当理解的是，在进行映射时，可以将一个PDCCH起始符号索引对应的第一套PDCCH候选中的所有PDCCH候选映射完毕之后，再映射下一个PDCCH起始符号索引对应的第一套PDCCH候选中的所有PDCCH候选。
方式六：第一套PDCCH候选根据PDCCH候选的聚合级别的顺序映射。
具体的，第一套PDCCH候选根据PDCCH候选的聚合级别由高到低的顺序映射的PDCCH候选；在进行映射时，可以将一个聚合级别映射对应的第一套PDCCH候选中的所有PDCCH候选映射完毕之后，再映射下一聚合级别对应的第一套PDCCH候选中的所有PDCCH候选。此时第一套PDCCH候选的选择方式与图7所示的选择方式类似。例如第一套PDCCH候选包含有AL为4的PDCCH候选、AL为2的PDCCH候选和AL为1的PDCCH候选，则映射的顺序为先选择第一套PDCCH候选中AL为4的PDCCH候选映射，再选择第一套PDCCH候选中AL为2的PDCCH候选映射，再选择第一套PDCCH候选中AL为1的PDCCH候选映射。
或者，第一套PDCCH候选根据PDCCH候选的聚合级别由高到低的顺序以及PDCCH监测时刻索引交织的顺序映射的PDCCH候选。在进行映射时，可以将一个聚合级别映射对应的第一套PDCCH候选中的所有PDCCH候选映射完毕之后，再映射下一聚合级别对应的第一套PDCCH候选中的所有PDCCH候选；在同一聚合级别的第一套PDCCH候选进行映射时，将一个PDCCH监测时刻索 引对应的该聚合级别的第一套PDCCH候选中的所有PDCCH候选映射完毕之后，再映射下一个PDCCH监测时刻索引对应的该聚合级别的第一套PDCCH候选中的所有PDCCH候选。此时第一套PDCCH候选的选择方式与图8所示的选择方式类似。例如第一套PDCCH候选为：occasion0对应的一个AL为4的PDCCH候选、occasion1对应的一个AL为2的PDCCH候选、occasion2对应的一个AL为4的PDCCH候选和occasion3对应的一个AL为4的PDCCH候选。则映射的顺序为：先选择第一套PDCCH候选中occasion0对应的一个AL为4的PDCCH候选映射，再选择第一套PDCCH候选中occasion2对应的一个AL为4的PDCCH候选映射，再选择第一套PDCCH候选中occasion3对应的一个AL为4的PDCCH候选映射，最后选择第一套PDCCH候选中occasion1对应的一个AL为2的PDCCH候选映射。
应当理解的是，事实上第一套PDCCH候选也可以根据PDCCH候选的聚合级别由高到低的顺序以及PDCCH监测时刻索引由大到小的顺序映射的PDCCH候选。设第一套PDCCH候选为：occasion0对应的一个AL为2的PDCCH候选、occasion1对应的一个AL为4的PDCCH候选、occasion2对应的一个AL为4的PDCCH候选和occasion3对应的一个AL为2的PDCCH候选。则映射的顺序为：先选择第一套PDCCH候选中occasion2对应的一个AL为4的PDCCH候选映射，再选择第一套PDCCH候选中occasion1对应的一个AL为4的PDCCH候选映射，再选择第一套PDCCH候选中occasion3对应的一个AL为2的PDCCH候选映射，最后选择第一套PDCCH候选中occasion0对应的一个AL为2的PDCCH候选映射。
或者根据PDCCH候选的聚合级别由高到低的顺序以及PDCCH监测时刻索引由小到大的顺序映射的PDCCH候选。设第一套PDCCH候选为：occasion0对应的一个AL为2的PDCCH候选、occasion1对应的一个AL为4的PDCCH候选、occasion2对应的一个AL为4的PDCCH候选和occasion3对应的一个AL为2的PDCCH候选。则映射的顺序为：先选择第一套PDCCH候选中occasion1对应的一个AL为4的PDCCH候选映射，再选择第一套PDCCH候选中occasion2对应的一个AL为4的PDCCH候选映射，再选择第一套PDCCH候选中occasion0对应的一个AL为2的PDCCH候选映射，最后选择第一套PDCCH候选中occasion3对应的一个AL为2的PDCCH候选映射。
在本实施例中，第一套PDCCH候选可以优先于第二套PDCCH候选进行选择。即，在第一套PDCCH候选中映射的PDCCH候选之后，才在第二套PDCCH候选中映射的PDCCH候选。
在对第二套PDCCH候选进行选择时，第四选择规则包括：第二套PDCCH 候选根据下述方式中的至少一种进行选择：
方式七：第二套PDCCH候选全部映射。
具体的，可以参见图11所示，第二套PDCCH候选即为编号5对应的28个PDCCH候选。在对这28个PDCCH候选进行选择时，可以选择将编号5对应的这28个PDCCH候选全部映射，也可以将编号5对应的这28个PDCCH候选全部放弃。
方式八：第二套PDCCH候选根据PDCCH监测时刻索引的顺序映射。
具体的，第二套PDCCH候选根据PDCCH监测时刻索引由大到小的顺序映射的PDCCH候选；或者，第二套PDCCH候选根据PDCCH监测时刻索引由小到大的顺序映射的PDCCH候选；或者，第二套PDCCH候选根据PDCCH监测时刻索引交织的顺序映射的PDCCH候选。此时在进行映射时，可以将一个PDCCH监测时刻索引对应的第二套PDCCH候选中的所有PDCCH候选映射完毕之后，再映射下一个PDCCH监测时刻索引对应的第二套PDCCH候选中的所有PDCCH候选。
在第二套PDCCH候选根据PDCCH监测时刻索引交织的顺序映射时，具体的，可以仅根据PDCCH监测时刻索引交织的顺序映射，例如，参见图10所示，交织的occasion索引顺序为occasion0-occasion2-occasion1-occasion3。图10中，5-8分别为对应PDCCH候选集合的编号，该编号反应映射顺序，映射时按编号由低到高依次映射。
应当理解的是，第二套PDCCH候选也可以根据PDCCH候选的聚合级别由高到低的顺序以及PDCCH监测时刻索引交织的顺序映射的PDCCH候选。交织的occasion索引顺序为occasion0-occasion2-occasion1-occasion3。在进行映射时，可以将一个聚合级别映射对应的第二套PDCCH候选中的所有PDCCH候选映射完毕之后，再映射下一聚合级别对应的第二套PDCCH候选中的所有PDCCH候选；在同一聚合级别的第二套PDCCH候选进行映射时，将一个PDCCH监测时刻索引对应的该聚合级别的第二套PDCCH候选中的所有PDCCH候选映射完毕之后，再映射下一个PDCCH监测时刻索引对应的该聚合级别的第二套PDCCH候选中的所有PDCCH候选。例如参见图12所示，图12中，5-11分别为对应PDCCH候选集合的编号，该编号反应映射顺序，映射时按编号由低到高依次映射。
应当理解的是，在本实施例中对于用户特定搜索空间集合中的PDCCH候选进行选择时，是按照各用户特定搜索空间集合在当前时隙内，各载波上的预设映射顺序来进行映射的。例如，参见图13所示，基站即先对载波CC1上的第二 套用户特定搜索空间集合的第二用户特定搜索空间集合USS set 3进行映射，再对载波CC1上的第一套用户特定搜索空间集合的第一用户特定搜索空间集合USS set 4进行映射，再对载波CC2上的第二套用户特定搜索空间集合的第二用户特定搜索空间集合USS set 3进行映射，再对载波CC2上的第一套用户特定搜索空间集合的第一用户特定搜索空间集合USS set 4进行映射。
在本实施例中，基站应当预先知晓终端的对于PDCCH候选监测次数的处理门限值，并知晓终端的对于CCE的处理门限值。在映射过程中，应当保证映射的总PDCCH候选对应的PDCCH候选监测次数小于等于终端的PDCCH候选监测次数的处理门限值，且映射的总PDCCH候选对应的CCE数目小于等于所述终端的CCE处理门限值。应当理解的是，前述映射的总PDCCH候选包含所述用户特定搜索空间集合中映射的PDCCH候选与公共搜索空间集合中映射的PDCCH候选。
需要说明的是，在实际选择过程中，在配置搜索空间集合后,终端对于一个PDCCH候选的监测次数通常是固定的，例如,对于一个用户特定搜索空间集合的一个PDCCH候选通常是两次。基于此，可以通过PDCCH候选监测次数的处理门限值来确定基站最大的映射PDCCH候选的数量。
假设对于给定的配置搜索空间集合参数下,一个PDCCH候选的一个PDCCH候选的监测次数为2,以基站知晓终端的对于PDCCH候选监测次数的处理门限值为2m为例，设公共搜索空间集合中映射的PDCCH候选为m1个，则基站配置的用户特定搜索空间集合中映射的PDCCH候选数目为m-m1，设为20。以图14为例：
先对载波CC1上的第二套用户特定搜索空间集合的第二用户特定搜索空间集合USS set 3进行映射：由于载波CC1上USS set 3上的PDCCH候选总数为16，小于20，则对于USS set 3上的PDCCH候选实质会全部映射(注意映射时的过程依据第二选择规则进行)。
再对载波CC1上的第一套用户特定搜索空间集合的第一用户特定搜索空间集合USS set 4进行映射，此时由于USS set 4上的PDCCH候选总数为8，大于了4(20-16)个，则按照第一选择规则将USS set 4上的PDCCH候选全部放弃。
再对载波CC2上的第二套用户特定搜索空间集合的第二用户特定搜索空间集合USS set 3进行映射。设第二选择规则是按照AL由高到低的顺序来进行选择的，则先选择载波CC2上USS set 3的AL2级别对应的PDCCH候选，共4个，刚好等于终端对于PDCCH候选的剩余处理能力值(20-16)个，故映射载波CC2上USS set 3的AL2级别对应的PDCCH候选，对于载波CC2上USS set 3的AL1级别对应的PDCCH候选全部放弃。此后对载波CC2上的第一套用户 特定搜索空间集合的第一用户特定搜索空间集合USS set 4也全部放弃。
应当理解的是，由于对于一个PDCCH候选而言，其CCE数量是确定的，因此基于上述相同的选择判别过程，可以控制映射的PDCCH候选的CCE数量不超过终端的CCE处理门限值的PDCCH候选。
在本实施例中，通常对于终端而言，其对于PDCCH候选监测次数的处理门限值和CCE处理门限值是固定的，因此工程师可以预先写入基站中。此外对于特殊的终端的PDCCH候选监测次数的处理门限值和CCE处理门限值有浮动时，终端可以通过通信连接主动告知基站其当前的PDCCH候选监测次数的处理门限值和CCE处理门限值。
应当理解的是，基站在映射完PDCCH候选后，基站会在映射的PDCCH候选上选择一个或多个PDCCH候选，作为承载下行控制信息的PDCCH信道，向终端发送下行控制信息。
相对应的，参见参见图15所示，图15为本公开实施例一提供的终端侧的一种候选信道映射方法的基本流程示意图，包括：
S1501：确定用户特定搜索空间集合。
在本实施例中，用户特定搜索空间集合包括第一套用户特定搜索空间集合和/或第二套用户特定搜索空间集合。在确定一个用户特定搜索空间集合为第一用户特定搜索空间集合还是为第二用户特定搜索空间集合时，可以遵循以下两种规则来进行确定：
其一：将在一个时隙内PDCCH监测时刻的数目等于1的用户特定搜索空间集合确定为第一用户特定搜索空间集合；将在一个时隙内PDCCH监测时刻的数目大于1的用户特定搜索空间集合确定为第二用户特定搜索空间集合。
其二：将在一个时隙内PDCCH监测时刻的数目等于1或PDDCH监测周期大于1个时隙的用户特定搜索空间集合确定为第一用户特定搜索空间集合；将在一个时隙内PDCCH监测时刻的数目大于1，且PDDCH监测周期等于1个时隙的用户特定搜索空间集合确定为第二用户特定搜索空间集合。
这里需要说明的是，基站除了会为终端配置用户特定搜索空间集合外，还会配置公共搜索空间集合。因此终端在监测PDCCH时，除了会在用户特定搜索空间集合监测PDCCH候选外，还会公共搜索空间集合中监测PDCCH候选。通常而言，终端会先映射出公共搜索空间集合中的所有PDCCH候选，再映射出用户特定搜索空间集合的PDCCH候选。
基站为终端配置的用户特定搜索空间集合，存在三种情况，即分别是仅包含第一套用户特定搜索空间集合；或者仅包含第二套用户特定搜索空间集合； 或者，同时包含第一套用户特定搜索空间集合和第二套用户特定搜索空间集合。
应当理解的是，本实施例中所述的映射即是指的选择。例如上述“在公共搜索空间集合中映射PDCCH候选”即是指的：在公共搜索空间集合中选择出最终要保留的PDCCH候选。
S1502：使用第一选择规则在第一套用户特定搜索空间集合中映射PDCCH候选；使用第二选择规则在第二套用户特定搜索空间集合中映射PDCCH候选。
在本实施例中，终端采用的第一选择规则和第二选择规则与基站采用的第一选择规则和第二选择规则相同。因此与基站侧相对应的：
第一选择规则包括：将第一用户特定搜索空间集合中的PDCCH候选全部映射，或者将第一用户特定搜索空间集合中的所有PDCCH候选全部不映射。
第二选择规则包括：第二用户特定搜索空间集合中的PDCCH候选根据下述方式中的至少一种进行映射：
方式一：第二用户特定搜索空间集合中的PDCCH候选根据PDCCH监测时刻索引的顺序映射。
具体的，第二用户特定搜索空间集合中的PDCCH候选根据PDCCH监测时刻索引由大到小的顺序选择PDCCH候选映射。或者，第二用户特定搜索空间集合中的PDCCH候选根据PDCCH监测时刻索引由小到大的顺序选择PDCCH候选映射。或者，第二用户特定搜索空间集合中的PDCCH候选根据PDCCH监测时刻索引交织的顺序选择PDCCH候选映射。
值得注意的是，在根据PDCCH监测时刻索引的顺序进行映射时，可以将一个PDCCH监测时刻索引对应的所有PDCCH候选映射完毕之后，才会映射下一个PDCCH监测时刻索引对应的所有PDCCH候选。
方式二：第二用户特定搜索空间集合中的PDCCH候选根据PDCCH起始符号索引的顺序映射。
应当理解的是，一个PDCCH监测时刻包括1个或多个PDCCH时域符号，不同PDCCH监测时刻的PDCCH起始符号不同，不同PDCCH候选监测时刻之间可以存在重叠的PDCCH时域符号。
在方式二中，其具体的实现方式与方式一类似。具体的，第二用户特定搜索空间集合中的PDCCH候选根据PDCCH起始符号索引由大到小的顺序选择PDCCH候选映射；或者，第二用户特定搜索空间集合中的PDCCH候选根据PDCCH起始符号索引由小到大的顺序选择PDCCH候选映射；或者，第二用户特定搜索空间集合中的PDCCH候选根据PDCCH起始符号索引交织的顺序选择 PDCCH候选映射。
值得注意的是，在根据PDCCH起始符号索引的顺序进行映射时，可以将一个PDCCH起始符号索引对应的所有PDCCH候选映射完毕之后，才会映射下一个PDCCH起始符号索引对应的所有PDCCH候选。
方式三：第二用户特定搜索空间集合中的PDCCH候选根据PDCCH候选的聚合级别的顺序映射。
具体的，第二用户特定搜索空间集合中的PDCCH候选根据PDCCH候选的聚合级别由高到低的顺序选择PDCCH候选映射。在进行映射时，可以先将一个聚合级别映射对应的所有PDCCH候选映射完毕之后，再映射下一聚合级别对应的所有PDCCH候选。
在本实施例中，还可以同时采用方式一和方式三从第二套用户特定搜索空间集合中的第二用户特定搜索空间集合中映射PDCCH候选；具体的，可以根据PDCCH候选的聚合级别由高到低的顺序，依次在不同聚合级别中映射PDCCH候选；在进行映射时，将一个聚合级别映射对应的所有PDCCH候选映射完毕之后，再映射下一聚合级别对应的所有PDCCH候选。应当注意的是，在同一聚合级别中，根据所述聚合级别中的所有PDCCH候选对应的PDCCH监测时刻索引，按照PDCCH监测时刻索引由大到小的顺序，或者按照PDCCH监测时刻索引由小到大的顺序，或者按照PDCCH监测时刻索引交织的顺序，映射所述聚合级别中的PDCCH候选；在同一聚合级别的PDCCH候选进行映射时，将一个PDCCH监测时刻索引对应的该聚合级别的所有PDCCH候选映射完毕之后，再映射下一个PDCCH监测时刻索引对应的该聚合级别的所有PDCCH候选。
在本实施例中，还可以同时采用方式二和方式三从第二套用户特定搜索空间集合中的第二用户特定搜索空间集合中映射PDCCH候选。与同时采用方式一和方式三从第二套用户特定搜索空间集合中的第二用户特定搜索空间集合中映射PDCCH候选映射类似的，可以根据PDCCH候选的聚合级别由高到低的顺序，依次在不同聚合级别中映射PDCCH候选；在进行映射时，将一个聚合级别映射对应的所有PDCCH候选映射完毕之后，再映射下一聚合级别对应的所有PDCCH候选；而在同一聚合级别中，根据聚合级别中的所有PDCCH候选对应的PDCCH起始符号索引，按照PDCCH起始符号索引由大到小的顺序，或者按照PDCCH起始符号索引由小到大的顺序，或者按照PDCCH起始符号索引交织的顺序，映射所述聚合级别中的PDCCH候选；在同一聚合级别的PDCCH候选进行映射时，将一个PDCCH起始符号索引对应的该聚合级别的所有PDCCH候选映射完毕之后，再映射下一个PDCCH起始符号索引对应的该聚合级别的所有PDCCH候选。
在本实施例中，第二选择规则还可以是：将第二用户特定搜索空间集合中的PDCCH候选划分为第一套PDCCH候选和第二套PDCCH候选，进而使用第三选择规则在第一套PDCCH候选中映射PDCCH候选；使用第四选择规则在第二套PDCCH候选中映射PDCCH候选。
具体的，在本实施例中，可以按照以下方式来划分第二用户特定搜索空间集合中的第一套PDCCH候选和第二套PDCCH候选：
对于第一套PDCCH候选可以通过以下方式选取：
1.可以根据PDCCH监测时刻索引顺序从第二用户特定搜索空间集合中的PDCCH候选中选择出第一套PDCCH候选。
具体的，可以从所述PDCCH监测时刻索引对应的第二用户特定搜索空间集合中的PDCCH候选中，选择n(n大于等于1)个PDCCH候选构成第一套PDCCH候选。
2.可以根据PDCCH监测时刻索引和PDCCH候选的聚合级别从第二用户特定搜索空间集合中的PDCCH候选中选择出第一套PDCCH候选。
具体的，可以从所述PDCCH监测时刻索引对应的第二用户特定搜索空间集合中的PDCCH候选中，选择n(n大于等于1)个聚合级别最高的PDCCH候选构成第一套PDCCH候选。
3.可以根据PDCCH起始符号索引从第二用户特定搜索空间集合中的PDCCH候选中选择出第一套PDCCH候选。
具体的，与上述1类似，可以从所述PDCCH起始符号索引对应的第二用户特定搜索空间集合中的PDCCH候选中，选择n(n大于等于1)个PDCCH候选构成第一套PDCCH候选。应当理解的是，此时在各PDCCH起始符号索引对应的PDCCH候选中选取的PDCCH候选所对应的聚合级别没有要求，可以是任意聚合级别的。
4.可以根据PDCCH起始符号索引和PDCCH候选的聚合级别从第二用户特定搜索空间集合中的PDCCH候选中选择出第一套PDCCH候选。
具体的，与上述2类似，可以从所述PDCCH起始符号索引对应的第二用户特定搜索空间集合中的PDCCH候选中，选择n(n大于等于1)个聚合级别最高的PDCCH候选构成第一套PDCCH候选。
在本实施的一种具体实施方式中，n可以取1或2。
对于第二套PDCCH候选，可以将第二用户特定搜索空间集合中除第一套PDCCH候选之外的其余PDCCH候选作为第二套PDCCH候选。例如参见图10 所示，除去第一套PDCCH候选中的四个PDCCH之外剩余的所有PDCCH即构成了第二套PDCCH候选。
在本实施例中，第三选择规则包括：第一套PDCCH候选根据下述方式中的至少一种进行选择：
方式四：第一套PDCCH候选根据PDCCH监测时刻索引的顺序映射。
具体的，第一套PDCCH候选可以根据PDCCH监测时刻索引由大到小的顺序映射PDCCH候选。或者，第一套PDCCH候选根据PDCCH监测时刻索引由小到大的顺序映射PDCCH候选。或者，第一套PDCCH候选根据PDCCH监测时刻索引交织的顺序映射PDCCH候选。应当理解的是，在进行映射时，可以将一个PDCCH监测时刻索引对应的第一套PDCCH候选中的所有PDCCH候选映射完毕之后，再映射下一个PDCCH监测时刻索引对应的第一套PDCCH候选中的所有PDCCH候选。
方式五：第一套PDCCH候选根据PDCCH起始符号索引的顺序映射。
具体的，与方式四类似，第一套PDCCH候选根据PDCCH起始符号索引由大到小的顺序映射PDCCH候选；或者，第一套PDCCH候选根据PDCCH起始符号索引由小到大的顺序映射PDCCH候选；或者，第一套PDCCH候选根据PDCCH起始符号索引交织的顺序映射PDCCH候选。应当理解的是，在进行映射时，可以将一个PDCCH起始符号索引对应的第一套PDCCH候选中的所有PDCCH候选映射完毕之后，再映射下一个PDCCH起始符号索引对应的第一套PDCCH候选中的所有PDCCH候选。
方式六：第一套PDCCH候选根据PDCCH候选的聚合级别的顺序映射。
具体的，第一套PDCCH候选根据PDCCH候选的聚合级别由高到低的顺序映射PDCCH候选；在进行映射时，可以将一个聚合级别映射对应的第一套PDCCH候选中的所有PDCCH候选映射完毕之后，再映射下一聚合级别对应的第一套PDCCH候选中的所有PDCCH候选。
或者，第一套PDCCH候选根据PDCCH候选的聚合级别由高到低的顺序以及PDCCH监测时刻索引交织的顺序映射PDCCH候选。在进行映射时，可以将一个聚合级别映射对应的第一套PDCCH候选中的所有PDCCH候选映射完毕之后，再映射下一聚合级别对应的第一套PDCCH候选中的所有PDCCH候选；在同一聚合级别的第一套PDCCH候选进行映射时，将一个PDCCH监测时刻索引对应的该聚合级别的第一套PDCCH候选中的所有PDCCH候选映射完毕之后，再映射下一个PDCCH监测时刻索引对应的该聚合级别的第一套PDCCH候选中的所有PDCCH候选。
应当理解的是，事实上第一套PDCCH候选也可以根据PDCCH候选的聚合级别由高到低的顺序以及PDCCH监测时刻索引由大到小的顺序映射PDCCH候选。或者根据PDCCH候选的聚合级别由高到低的顺序以及PDCCH监测时刻索引由小到大的顺序映射PDCCH候选。
在本实施例中，第一套PDCCH候选可以优先于第二套PDCCH候选进行选择。即，在第一套PDCCH候选中映射PDCCH候选之后，才在第二套PDCCH候选中映射PDCCH候选。
在对第二套PDCCH候选进行选择时，第四选择规则包括：第二套PDCCH候选根据下述方式中的至少一种进行选择：
方式七：第二套PDCCH候选全部选择为映射的PDCCH候选。
方式八：第二套PDCCH候选根据PDCCH监测时刻索引的顺序映射PDCCH候选。
具体的，第二套PDCCH候选根据PDCCH监测时刻索引由大到小的顺序映射PDCCH候选；或者，第二套PDCCH候选根据PDCCH监测时刻索引由小到大的顺序映射PDCCH候选；或者，第二套PDCCH候选根据PDCCH监测时刻索引交织的顺序映射PDCCH候选。此时在进行映射时，可以将一个PDCCH监测时刻索引对应的第二套PDCCH候选中的所有PDCCH候选映射完毕之后，再映射下一个PDCCH监测时刻索引对应的第二套PDCCH候选中的所有PDCCH候选。
在第二套PDCCH候选根据PDCCH监测时刻索引交织的顺序映射PDCCH候选时，具体的，可以仅根据PDCCH监测时刻索引交织的顺序映射PDCCH候选。
应当理解的是，在本实施例中对于用户特定搜索空间集合中的PDCCH候选进行映射时，是按照各用户特定搜索空间集合在当前时隙内，各载波上的预设映射顺序来进行映射的。
在本实施例中，终端映射出的PDCCH候选，应当保证映射的总PDCCH候选对应的PDCCH候选监测次数小于等于终端的PDCCH候选监测次数的处理门限值，且映射的总PDCCH候选对应的CCE数目小于等于所述终端的CCE处理门限值。应当理解的是，前述映射的总PDCCH候选包含所述用户特定搜索空间集合中映射的PDCCH候选与公共搜索空间集合中映射的PDCCH候选。
根据本公开实施例提供的候选信道映射方法，通过为终端配置包含第一套用户特定搜索空间集合和/或第二套用户特定搜索空间集合的用户特定搜索空间集合，再使用第一选择规则在第一套用户特定搜索空间集合中映射PDCCH候 选，使用第二选择规则在第二套用户特定搜索空间集合中映射PDCCH候选，从而实现对PDCCH候选进行筛选。在筛选过程中结合终端的PDCCH候选监测次数的处理门限值和CCE处理门限值，从而保证一个时隙上最终保留的PDCCH候选在终端进行处理时，处于UE支持的能力范围之内。
实施例二：
参见图16所示，图16为本公开实施例二提供的基站侧的一种候选信道映射方法的基本流程示意图，包括：
S1601：确定终端的第三套用户特定搜索空间集合。
在本实施例中，第三套用户特定搜索空间集合中包含一个或多个第三用户特定搜索空间集合。第三套用户特定搜索空间集合中的一个或多个第三用户特定搜索空间集合包含了一个时隙上的所有PDCCH候选。
需要说明的是，对于一个时隙而言，其在一个载波上会存在有多个下行带宽部分，其中可能会存在一个初始激活下行带宽部分，一个载波上除了初始激活下行带宽部分之外的剩余的下行用户带宽部分中只会有一个激活，成为激活下行带宽部分。在使用时，终端实质只会在初始激活下行带宽部分和激活下行带宽部分上的用户特定搜索空间集合中监测PDCCH候选，因此，本实施例中第三套用户特定搜索空间集合可以包括：在一个时隙上激活下行带宽部分和/或初始激活下行带宽部分上的终端的所有用户特定搜索空间集合。
S1602：根据载波索引和搜索空间集合索引在第三套用户特定搜索空间集合中映射PDCCH候选。
在本实施例中，根据载波索引和搜索空间集合索引在第三套用户特定搜索空间集合中映射PDCCH候选包括：按照载波索引由低到高的顺序，依次对各载波上第三套用户特定搜索空间集合中的PDCCH候选映射。而在同一载波上，按照搜索空间集合索引由低到高的顺序，依次对各第三用户特定搜索空间集合中的PDCCH候选映射。例如参见图13所示，先对载波CC1上的用户特定搜索空间集合USS set 3和USS set 4进行映射，再对载波CC2上的用户特定搜索空间集合USS set 3和USS set 4进行映射。在对载波CC1上的用户特定搜索空间集合USS set 3和USS set 4进行映射时，先对载波CC1上的用户特定搜索空间集合USS set 3进行映射，再对载波CC1上的用户特定搜索空间集合USS set 4进行映射。在对载波CC2上的用户特定搜索空间集合USS set 3和USS set 4进行映射时，先对载波CC2上的用户特定搜索空间集合USS set 3进行映射，再对载波CC2上的用户特定搜索空间集合USS set 4进行映射。
在本实施例中，根据当前时隙中的载波索引和搜索空间集合索引在所述第三套用户特定搜索空间集合中映射PDCCH候选包括：按照载波索引由低到高的顺序，依次交替地对所述载波上第三套用户特定搜索空间集合中的PDCCH候选映射；在同一载波上，按照搜索空间集合索引由低到高的顺序，依次对第三用户特定搜索空间集合中的PDCCH候选映射。例如参见图17所示，先对载波CC1上的用户特定搜索空间集合USS set 3进行映射，再对载波CC2上的用户特定搜索空间集合USS set 3进行映射，再对载波CC1上的用户特定搜索空间集合USSset 4进行映射，再对载波CC2上的用户特定搜索空间集合USS set 4进行映射。
或者，按照搜索空间集合索引由低到高的顺序，依次在所述搜索空间集合索引对应的第三用户特定搜索空间集合中映射PDCCH候选；对于相同搜索空间集合索引对应的多个第三用户特定搜索空间集合，按照载波索引由低到高的顺序，依次在第三用户特定搜索空间集合中映射PDCCH候选。
在本实施例中，按照搜索空间集合索引由低到高的顺序，依次在第三用户特定搜索空间集合中映射PDCCH候选时，可以是：按照搜索空间集合索引由低到高的顺序，对一个搜索空间集合索引对应的第三用户特定搜索空间集合映射完所有需要映射的PDCCH候选后，再对一个搜索空间集合索引对应的第三用户特定搜索空间集合映射PDCCH候选。
在本实施例中，根据载波索引和搜索空间集合索引在第三套用户特定搜索空间集合中映射PDCCH候选包括以下方式中的至少一种：
方式九：直接根据载波索引和搜索空间集合索引在第三套用户特定搜索空间集合中映射PDCCH候选。
例如图13和图17所示的方式即为直接根据载波索引和搜索空间集合索引在第三套用户特定搜索空间集合中映射PDCCH候选。
方式十：根据载波索引、搜索空间集合索引以及时隙索引在所述第三套用户特定搜索空间集合中映射PDCCH候选。
具体的，根据时隙索引以及第三套用户特定搜索空间集合中各第三用户特定搜索空间集合在各载波上的映射先后顺序设置周期，确定时隙索引对应的时隙内，各载波上的第三套用户特定搜索空间集合中各第三用户特定搜索空间集合的映射先后顺序设置规则；进而根据载波索引和映射先后顺序设置规则，依次对载波上第三套用户特定搜索空间集合中的PDCCH候选映射PDCCH候选；在同一载波上，按照搜索空间集合索引由低到高的顺序，依次对各第三用户特定搜索空间集合中的PDCCH候选映射的PDCCH候选。
例如参见图18所示，各载波上的第三套用户特定搜索空间集合中各第三用 户特定搜索空间集合的映射先后顺序设置规则呈周期性，周期为4个时隙。则根据时隙索引n来除以周期4即可通过余数得到时隙索引n在一个周期中的位置，例如以余数为1为例，则对应于一个周期中的第一个时隙，此时该时隙内的映射先后顺序即与图13相同，即根据载波索引和搜索空间集合索引，先对载波CC1上的用户特定搜索空间集合USS set 3和USS set 4进行映射，再对载波CC2上的用户特定搜索空间集合USS set 3和USS set 4进行映射。在对载波CC1上的用户特定搜索空间集合USS set 3和USS set 4进行映射时，先对载波CC1上的用户特定搜索空间集合USS set 3进行映射，再对载波CC1上的用户特定搜索空间集合USS set 4进行映射。在对载波CC2上的用户特定搜索空间集合USS set 3和USS set 4进行映射时，先对载波CC2上的用户特定搜索空间集合USS set 3进行映射，再对载波CC2上的用户特定搜索空间集合USS set 4进行映射。
方式十一：根据载波索引、搜索空间集合索引以及载波类型在第三套用户特定搜索空间集合中映射PDCCH候选。
具体的，载波类型包括主小区载波和辅小区载波。在选择方式十一在所述第三套用户特定搜索空间集合中映射的PDCCH候选时，包括：在对主小区载波上第三套用户特定搜索空间集合中的PDCCH候选映射的PDCCH候选之后，按照载波索引由低到高的顺序，依次对各辅小区载波上第三套用户特定搜索空间集合中的PDCCH候选映射的PDCCH候选；在同一载波上，按照搜索空间集合索引由低到高的顺序，依次对各第三用户特定搜索空间集合中的PDCCH候选映射的PDCCH候选。
应当理解的是，在本实施例中在对各载波上的第三套用户特定搜索空间集合中各第三用户特定搜索空间集合进行映射时，对于各第三用户特定搜索空间集合，可以先按照上述实施例一的方式，确定各第三用户特定搜索空间集合是第一用户特定搜索空间集合还是第二用户特定搜索空间集合，进而将是第一用户特定搜索空间集合的各第三用户特定搜索空间集合按上述实施例一中的第一选择规则进行选择，将是第二用户特定搜索空间集合的各第三用户特定搜索空间集合按上述实施例一中的第二选择规则进行选择。
在本实施例中，基站应当预先知晓终端的对于PDCCH候选监测次数的处理门限值，以及对于CCE的处理门限值。在实际选择过程中，应当保证映射的总PDCCH候选对应的PDCCH候选监测次数小于等于终端的PDCCH候选监测次数的处理门限值，且映射的总PDCCH候选对应的CCE数目小于等于所述终端的CCE处理门限值。应当理解的是，前述映射的总PDCCH候选包含所述用户特定搜索空间集合中映射的PDCCH候选与公共搜索空间集合中映射的PDCCH候选。
应当理解的是，基站在选择完映射的PDCCH候选后，基站会在映射的PDCCH候选上选择一个或多个PDCCH候选，作为承载下行控制信息的PDCCH信道，向终端发送下行控制信息。
相对应的，参见参见图19所示，图19为本公开实施例二提供的终端侧的一种候选信道映射方法的基本流程示意图，包括：
S1901：确定第三套用户特定搜索空间集合。
在本实施例中，第三套用户特定搜索空间集合中包含一个或多个第三用户特定搜索空间集合；且第三套用户特定搜索空间集合中的一个或多个第三用户特定搜索空间集合包含了一个时隙上的所有PDCCH候选。
需要说明的是，对于一个时隙而言，其在一个载波上会存在有多个下行带宽部分，其中可能有一个为初始激活下行带宽部分，剩余的下行用户带宽部分中只会有一个激活，成为激活下行带宽部分。在使用时，终端实质只会对初始激活下行带宽部分和激活下行带宽部分上的用户特定搜索空间集合中的PDCCH候选进行监测，因此，本实施例中第三套用户特定搜索空间集合可以包括：在一个时隙上激活下行带宽部分和/或初始激活下行带宽部分上的终端的所有用户特定搜索空间集合。
S1902：根据载波索引和搜索空间集合索引在所述第三套用户特定搜索空间集合中映射PDCCH候选。
在本实施例中，终端映射PDCCH候选的方式应当与基站映射PDCCH候选的方式相同。具体的，
根据当前时隙中的载波索引和搜索空间集合索引在第三套用户特定搜索空间集合中映射PDCCH候选包括：按照载波索引由低到高的顺序，依次对各载波上第三套用户特定搜索空间集合中的PDCCH候选进行映射。而在同一载波上，按照搜索空间集合索引由低到高的顺序，依次对第三用户特定搜索空间集合中的PDCCH候选进行映射。
在本实施例中，根据当前时隙中的载波索引和搜索空间集合索引在所述第三套用户特定搜索空间集合中映射PDCCH候选包括：按照载波索引由低到高的顺序，依次交替地对所述载波上第三套用户特定搜索空间集合中的PDCCH候选映射；在同一载波上，按照搜索空间集合索引由低到高的顺序，依次对第三用户特定搜索空间集合中的PDCCH候选映射。
或者，按照搜索空间集合索引由低到高的顺序，依次在所述搜索空间集合索引对应的第三用户特定搜索空间集合中映射PDCCH候选；对于相同搜索空间集合索引对应的多个第三用户特定搜索空间集合，按照载波索引由低到高的顺 序，依次在第三用户特定搜索空间集合中映射PDCCH候选。
在本实施例中，按照搜索空间集合索引由低到高的顺序，依次在所述第三用户特定搜索空间集合中映射PDCCH候选时，可以是：按照搜索空间集合索引由低到高的顺序，对一个搜索空间集合索引对应的第三用户特定搜索空间集合映射完所有需要映射的PDCCH候选后，再对一个搜索空间集合索引对应的第三用户特定搜索空间集合映射PDCCH候选。
在本实施例中，根据载波索引和搜索空间集合索引在第三套用户特定搜索空间集合中映射PDCCH候选包括以下方式中的至少一种：
直接根据载波索引和搜索空间集合索引在第三套用户特定搜索空间集合中映射PDCCH候选。
或，根据载波索引、搜索空间集合索引以及载波类型在第三套用户特定搜索空间集合中映射PDCCH候选；具体的，载波类型包括主小区载波和辅小区载波。在所述第三套用户特定搜索空间集合中映射PDCCH候选时，包括：在对主小区载波上第三套用户特定搜索空间集合中的PDCCH候选映射PDCCH候选之后，按照载波索引由低到高的顺序，依次对各辅小区载波上第三套用户特定搜索空间集合中的PDCCH候选映射PDCCH候选；在同一载波上，按照搜索空间集合索引由低到高的顺序，依次对各第三用户特定搜索空间集合中的PDCCH候选映射PDCCH候选。
或，根据载波索引、搜索空间集合索引以及时隙索引在所述第三套用户特定搜索空间集合中映射PDCCH候选。具体的，根据时隙索引以及第三套用户特定搜索空间集合中各第三用户特定搜索空间集合在各载波上的映射先后顺序设置周期，确定时隙索引对应的时隙内，各载波上的第三套用户特定搜索空间集合中各第三用户特定搜索空间集合的映射先后顺序设置规则；进而根据载波索引和排布映射先后顺序设置规则，依次对载波上第三套用户特定搜索空间集合中的PDCCH候选映射PDCCH候选；在同一载波上，按照搜索空间集合索引由低到高的顺序，依次对各第三用户特定搜索空间集合中的PDCCH候选映射PDCCH候选。
应当理解的是，在基站在对各载波上的第三套用户特定搜索空间集合中各第三用户特定搜索空间集合进行映射时，对于各第三用户特定搜索空间集合，先按照上述实施例一的方式，确定各第三用户特定搜索空间集合是第一用户特定搜索空间集合还是第二用户特定搜索空间集合，进而将是第一用户特定搜索空间集合的各第三用户特定搜索空间集合按上述实施例一中的第一选择规则进行选择，将是第二用户特定搜索空间集合的各第三用户特定搜索空间集合按上述实施例一中的第二选择规则进行选择时，终端应当对应的采用上述实施例一 的方式进行PDCCH映射和PDCCH监测。
在本实施例中，终端映射出的PDCCH候选，应当保证映射的总PDCCH候选对应的PDCCH候选监测次数小于等于终端的PDCCH候选监测次数的处理门限值，且映射的总PDCCH候选对应的CCE数目小于等于所述终端的CCE处理门限值。应当理解的是，前述映射的总PDCCH候选包含所述用户特定搜索空间集合中映射的PDCCH候选与公共搜索空间集合中映射的PDCCH候选。
根据本公开实施例提供的候选信道映射方法，通过为终端配置第三套用户特定搜索空间集合，再根据载波索引和搜索空间集合索引在第三套用户特定搜索空间集合中映射PDCCH候选，从而实现对PDCCH候选进行筛选。在筛选过程中结合终端的PDCCH候选处理门限值监测次数的和CCE处理门限值，从而保证一个时隙上最终保留的PDCCH候选和最终保留的需要进行信道估计的CCE数目处于UE支持的能力范围之内。
实施例三：
本实施例在实施例一和/或实施例二的基础上，对本公开的的方案做进一步的示例说明。
在基站侧：
本实施例中，基站从第三套用户特定搜索空间集合中映射PDCCH候选。本实施例中，第三套用户特定搜索空间集合包含一个基站为一个终端在一个时隙上配置所有用户特定搜索空间集合中的所有PDCCH候选，如图13所示。
应当理解的是，基站根据基站高层参数的配置，确定第三套用户特定搜索空间集合的。
本实施例中，从第三套用户特定搜索空间集合中映射PDCCH候选，基于：按照载波索引由低到高的顺序，选择完一个载波上所有需要映射的PDCCH候选，再对下一个载波映射PDCCH候选。在一个载波内，按照搜索空间集合索引由低到高的顺序，选择用户特定搜索空间集合内所有需要映射的PDCCH候选。
本实施例中，基站为终端配置的搜索空间集合包含公共搜索空间集合和用户特定搜索空间集合。本实施例中，先映射一个时隙上所有公共搜索空间集合中的所有PDCCH候选后，再对用户特定搜索空间集合映射PDCCH候选。
具体的，如图13所示，在载波1上，基站为终端配置的用户特定搜索空间集合包括USS set 3和USS set 4。
载波1上USS set 3的相关配置如下：
USS set 3为用户特定搜索空间集合：PDCCH监测周期为1个时隙；PDCCH监测时隙上有两个PDCCH监测时刻(即指示有两个PDCCH监测(起始)符号位置)；聚合级别AL1包含4个PDCCH候选；聚合级别AL2包含4个PDCCH候选；
载波1上USS set 4的相关配置如下：
USS set 4为用户特定搜索空间集合：PDCCH监测周期为5个时隙；PDCCH监测时隙上有1个PDCCH监测时刻(即指示有1个PDCCH监测(起始)符号位置)；聚合级别AL1包含4个PDCCH候选；聚合级别AL2包含4个PDCCH候选。
另外，在载波2上，基站为终端配置的用户特定搜索空间集合包括USS set 3和USS set 4。
对于载波2上USS set 3的相关配置如下：
USS set 3为用户特定搜索空间集合：PDCCH监测周期为1个时隙；PDCCH监测时隙上有2个PDCCH监测时刻(即指示有2个PDCCH监测(起始)符号位置)；聚合级别AL2包含2个PDCCH候选。
对于载波2上search space set 4的相关配置如下：
USS set 4为用户特定搜索空间集合：PDCCH监测周期为5个时隙；PDCCH监测时隙有1个PDCCH监测时刻(即指示有1个PDCCH监测(起始)符号位置)；聚合级别AL1包含4个PDCCH候选；聚合级别AL2包含4个PDCCH候选。
需要理解的是，对于上述配置的PDCCH监测时刻而言，一个PDCCH监测时刻包括1个或多个PDCCH起始符号，不同PDCCH监测时刻的PDCCH起始符号不同，不同PDCCH候选监测时刻之间可以存在重叠的PDCCH起始符号。根据上述的配置，假设时隙n包含基站配置的公共搜索空间集合、载波1上的USS set 3、载波1上的USS set 4、载波2上的USS set 3、载波2上的USS set 4，并且时隙n上基站配置的PDCCH候选如图13所示。本实施例中，时隙n上先对公共搜索空间集合中的所有的PDCCH候选映射；然后，再按照下面的顺序对用户特定搜索空间集合映射PDCCH候选：
按照载波索引由低到高的顺序，映射完一个载波上所有需要映射的PDCCH候选，再对下一个载波映射PDCCH候选；在一个载波内，按照搜索空间集合索引由低到高的顺序，映射搜索空间集合内所有需要映射的PDCCH候选。
更具体的，如图13所示，基站按照载波索引由低到高的顺序，先对载波索引1(CC1)对应的USS set 3和USS set 4进行PDCCH候选的映射；然后，再 对载波索引2(CC 2)对应的USS set 3和USS set 4进行PDCCH候选的映射。对于同一载波索引，基站按照搜索空间集合索引由低到高的顺序对前一个用户特定搜索空间集合映射所有需要映射的PDCCH候选后，再对该载波索引对应的下一个用户特定搜索空间集合进行PDCCH候选的映射。例如，在载波1内，先对USS set 3映射完需要映射PDCCH候选后，再对USS set 4选择PDCCH候选映射。根据上述描述，不同载波索引对应的用户特定搜索空间集合的映射顺序如图13所示。
本实施例中，映射的PDCCH候选需要保证不超过终端的信道估计能力(CCE的处理门限值)和/或盲检测数目能力(PDCCH候选处理门限值)。
本实施例中，基站在所选择的映射的PDCCH候选上选择一个或多个PDCCH候选来作为PDCCH信道承载下行控制信息，并发送给终端。
在终端侧：
本实施例中，终端从第三套用户特定搜索空间集合中映射PDCCH候选。本实施例中，第三套用户特定搜索空间集合包含一个基站为一个终端在一个时隙上配置所有用户特定搜索空间集合中的所有PDCCH候选，如图13所示。
应当理解的是，终端是根据基站高层参数的配置，来确定第三套用户特定搜索空间集合的。
本实施例中，从第三套用户特定搜索空间集合中映射PDCCH候选，基于：按照载波索引由低到高的顺序，映射完一个载波上所有需要映射的PDCCH候选，再对下一个载波映射PDCCH候选；在一个载波内，按照搜索空间集合索引由低到高的顺序，映射搜索空间集合内所有需要映射的PDCCH候选。
本实施例中，基站为终端配置的搜索空间集合包含公共搜索空间集合和用户特定搜索空间集合。本实施例中，映射一个时隙上所有公共搜索空间集合中的所有PDCCH候选后，再对用户特定搜索空间集合映射PDCCH候选。
具体的，在载波1上，基站为终端配置的用户特定搜索空间集合包括USS set 3和USS set 4。
载波1上USS set 3的相关配置如下：
USS set 3为用户特定搜索空间集合：PDCCH监测周期为1个时隙；PDCCH监测时隙上有两个PDCCH监测时刻(即指示有两个PDCCH监测(起始)符号位置)；聚合级别AL1包含4个PDCCH候选；聚合级别AL2包含4个PDCCH候选；
载波1上USS set 4的相关配置如下：
USS set 4为用户特定搜索空间集合：PDCCH监测周期为5个时隙；PDCCH监测时隙上有1个PDCCH监测时刻(即指示有1个PDCCH监测(起始)符号位置)；聚合级别AL1包含4个PDCCH候选；聚合级别AL2包含4个PDCCH候选。
另外，在载波2上，基站为终端配置的用户特定搜索空间集合包括USS set 3和USS set 4。
对于载波2上USS set 3的相关配置如下：
USS set 3为用户特定搜索空间集合：PDCCH监测周期为1个时隙；PDCCH监测时隙上有2个PDCCH监测时刻(即指示有2个PDCCH监测(起始)符号位置)；聚合级别AL2包含2个PDCCH候选。
对于载波2上search space set 4的相关配置如下：
USS set 4为用户特定搜索空间集合：PDCCH监测周期为5个时隙；PDCCH监测时隙有1个PDCCH监测时刻(即指示有1个PDCCH监测(起始)符号位置)；聚合级别AL1包含4个PDCCH候选；聚合级别AL2包含4个PDCCH候选。
对于上述配置的PDCCH监测时刻而言，，一个PDCCH监测时刻包括1个或多个PDCCH起始符号，不同PDCCH监测时刻的PDCCH起始符号不同，不同PDCCH候选监测时刻之间可以存在重叠的PDCCH起始符号。根据上述的配置，假设时隙n包含基站配置的公共搜索空间集合、载波1上的USS set 3、载波1上的USS set 4、载波2上的USS set 3、载波2上的USS set 4，并且时隙n上基站配置的PDCCH候选如图13所示。本实施例中，时隙n上先映射公共搜索空间集合中的所有的PDCCH候选；然后，再按照下面的顺序对用户特定搜索空间集合映射PDCCH候选：
按照载波索引由低到高的顺序，映射完一个载波上所有需要映射的PDCCH候选，再对下一个载波映射PDCCH候选；在一个载波内，按照搜索空间集合索引由低到高的顺序，映射搜索空间集合内所有需要映射的PDCCH候选。
更具体的，如图13所示，终端按照载波索引由低到高的顺序，先对载波索引1(CC1)对应的USS set 3和USS set 4进行PDCCH候选映射；然后，再对载波索引2(CC 2)对应的USS set 3和USS set 4进行PDCCH候选映射。对于同一载波索引，基站按照搜索空间集合索引由低到高的顺序对前一个用户特定搜索空间集合映射所有需要映射的PDCCH候选后，再对该载波索引对应的下一个用户特定搜索空间集合进行PDCCH候选的映射。例如，在载波1内，先对USS set 3映射完需要映射PDCCH候选后，再对USS set 4的PDCCH候选映射。 根据上述描述，不同载波索引对应的用户特定搜索空间集合的映射顺序如图13所示。
本实施例中，映射的PDCCH候选需要保证不超过终端的信道估计能力和/或盲检测数目能力。
本实施例中，终端的PDCCH盲检测限制在上述映射的PDCCH候选对应的PDCCH候选集合内。
实施例四：
本实施例在实施例一和/或实施例二的基础上，对本公开的的方案做进一步的示例说明。
在基站侧：
本实施例中，基站从第三套用户特定搜索空间集合中映射PDCCH候选。本实施例中，第三套用户特定搜索空间集合包含一个基站为一个终端在一个时隙上配置所有用户特定搜索空间集合中的所有PDCCH候选，如图17所示。
应当理解的是，基站根据基站高层参数的配置，来确定第三套用户特定搜索空间集合的。
本实施例中，从第三套用户特定搜索空间集合中映射PDCCH候选，基于：按照载波索引由低到高的顺序，交替的每个载波映射一个搜索空间集合中所有需要映射的PDCCH候选。在一个载波内，按照搜索空间集合索引由低到高的顺序，选择用户特定搜索空间集合内所有需要映射的PDCCH候选。
本实施例中，用户特定搜索空间集合的PDCCH候选的映射顺序如下：按照载波索引由低到高的顺序交替映射一个用户特定搜索空间集合内所有需要进行映射的PDCCH候选；对于同一载波索引，基站按照搜索空间集合索引由低到高的顺序对前一个用户特定搜索空间集合映射所有需要映射的PDCCH候选后，再对该载波索引对应的下一个用户特定搜索空间集合进行PDCCH候选的映射。
本实施例中，基站为终端配置的搜索空间集合包含公共搜索空间集合和用户特定搜索空间集合。本实施例中，先映射一个时隙上所有公共搜索空间集合中的所有PDCCH候选后，再对用户特定搜索空间集合映射PDCCH候选。
具体的，如图17所示，在载波1上，基站为终端配置的用户特定搜索空间集合包括USS set 3和USS set 4。
载波1上USS set 3的相关配置如下：
USS set 3为用户特定搜索空间集合：PDCCH监测周期为1个时隙；PDCCH 监测时隙上有两个PDCCH监测时刻(即指示有两个PDCCH监测(起始)符号位置)；聚合级别AL1包含4个PDCCH候选；聚合级别AL2包含4个PDCCH候选；
载波1上USS set 4的相关配置如下：
USS set 4为用户特定搜索空间集合：PDCCH监测周期为5个时隙；PDCCH监测时隙上有1个PDCCH监测时刻(即指示有1个PDCCH监测(起始)符号位置)；聚合级别AL1包含4个PDCCH候选；聚合级别AL2包含4个PDCCH候选。
另外，在载波2上，基站为终端配置的用户特定搜索空间集合包括USS set 3和USS set 4。
对于载波2上USS set 3的相关配置如下：
USS set 3为用户特定搜索空间集合：PDCCH监测周期为1个时隙；PDCCH监测时隙上有2个PDCCH监测时刻(即指示有2个PDCCH监测(起始)符号位置)；聚合级别AL2包含2个PDCCH候选。
对于载波2上search space set 4的相关配置如下：
USS set 4为用户特定搜索空间集合：PDCCH监测周期为5个时隙；PDCCH监测时隙有1个PDCCH监测时刻(即指示有1个PDCCH监测(起始)符号位置)；聚合级别AL1包含4个PDCCH候选；聚合级别AL2包含4个PDCCH候选。
需要理解的是，对于上述配置的PDCCH监测时刻而言，一个PDCCH监测时刻包括1个或多个PDCCH起始符号，不同PDCCH监测时刻的PDCCH起始符号不同，不同PDCCH候选监测时刻之间可以存在重叠的PDCCH起始符号。根据上述的配置，假设时隙n包含基站配置的公共搜索空间集合、载波1上的USS set 3、载波1上的USS set 4、载波2上的USS set 3、载波2上的USS set 4，并且时隙n上基站配置的PDCCH候选如图17所示。本实施例中，时隙n上先选择公共搜索空间集合中的所有的PDCCH候选映射；然后，再按照下面的顺序对用户特定搜索空间集合映射PDCCH候选：
按照载波索引由低到高的顺序，交替的每个载波映射一个用户特定搜索空间集合中所有需要映射的PDCCH候选；在一个载波内，按照用户特定搜索空间集合由低到高的顺序，映射用户特定搜索空间集合内所有需要映射的PDCCH候选。
更具体的，如图17所示，基站对用户特定搜索空间集合映射PDCCH候选按照下面的顺序进行PDCCH候选的映射：
首先映射载波索引1(CC1)对应的USS set 3内所有需要映射的PDCCH候选；然后，映射载波索引2(CC 2)对应的USS set 3内所有需要映射的PDCCH候选；再次，映射载波索引1(CC1)对应的USS set 4内所有需要映射的PDCCH候选；最后，映射载波索引2(CC2)对应的USS set 4内所有需要映射的PDCCH候选。
本实施例中，映射的PDCCH候选需要保证不超过终端的信道估计能力(CCE的处理门限值)和/或盲检测数目能力(PDCCH候选处理门限值)。
本实施例中，基站在所选择的映射的PDCCH候选上选择一个或多个PDCCH候选来作为PDCCH信道承载下行控制信息，并发送给终端。
在终端侧：
终端从第三套用户特定搜索空间集合中映射的PDCCH候选。本实施例中，第三套用户特定搜索空间集合包含一个基站为一个终端在一个时隙上配置所有用户特定搜索空间集合中的所有PDCCH候选，如图17所示。
应当理解的是，终端是根据基站高层参数的配置，来确定第三套用户特定搜索空间集合的。
本实施例中，从第三套用户特定搜索空间集合中映射PDCCH候选，基于：按照载波索引由低到高的顺序，交替的每个载波映射一个搜索空间集合中所有需要映射的PDCCH候选。在一个载波内，按照搜索空间集合索引由低到高的顺序，映射用户特定搜索空间集合内所有需要映射的PDCCH候选。
本实施例中，用户特定搜索空间集合的PDCCH候选的映射顺序如下：按照载波索引由低到高的顺序交替映射一个用户特定搜索空间集合内所有需要进行映射的PDCCH候选；对于同一载波索引，终端按照搜索空间集合索引由低到高的顺序对前一个用户特定搜索空间集合映射所有需要映射的PDCCH候选后，再对该载波索引对应的下一个用户特定搜索空间集合进行PDCCH候选的映射。
本实施例中，基站为终端配置的搜索空间集合包含公共搜索空间集合和用户特定搜索空间集合。本实施例中，终端先映射一个时隙上所有公共搜索空间集合中的所有PDCCH候选后，再对用户特定搜索空间集合映射PDCCH候选。
具体的，如图17所示，在载波1上，基站为终端配置的用户特定搜索空间集合包括USS set 3和USS set 4。
载波1上USS set 3的相关配置如下：
USS set 3为用户特定搜索空间集合：PDCCH监测周期为1个时隙；PDCCH监测时隙上有两个PDCCH监测时刻(即指示有两个PDCCH监测(起始)符号 位置)；聚合级别AL1包含4个PDCCH候选；聚合级别AL2包含4个PDCCH候选；
载波1上USS set 4的相关配置如下：
USS set 4为用户特定搜索空间集合：PDCCH监测周期为5个时隙；PDCCH监测时隙上有1个PDCCH监测时刻(即指示有1个PDCCH监测(起始)符号位置)；聚合级别AL1包含4个PDCCH候选；聚合级别AL2包含4个PDCCH候选。
另外，在载波2上，基站为终端配置的用户特定搜索空间集合包括USS set 3和USS set 4。
对于载波2上USS set 3的相关配置如下：
USS set 3为用户特定搜索空间集合：PDCCH监测周期为1个时隙；PDCCH监测时隙上有2个PDCCH监测时刻(即指示有2个PDCCH监测(起始)符号位置)；聚合级别AL2包含2个PDCCH候选。
对于载波2上search space set 4的相关配置如下：
USS set 4为用户特定搜索空间集合：PDCCH监测周期为5个时隙；PDCCH监测时隙有1个PDCCH监测时刻(即指示有1个PDCCH监测(起始)符号位置)；聚合级别AL1包含4个PDCCH候选；聚合级别AL2包含4个PDCCH候选。
对于上述配置的PDCCH监测时刻而言，一个PDCCH监测时刻包括1个或多个PDCCH起始符号，不同PDCCH监测时刻的PDCCH起始符号不同，不同PDCCH候选监测时刻之间可以存在重叠的PDCCH起始符号。根据上述的配置，假设时隙n包含基站配置的公共搜索空间集合、载波1上的USS set 3、载波1上的USS set 4、载波2上的USS set 3、载波2上的USS set 4，并且时隙n上基站配置的PDCCH候选如图17所示。本实施例中，时隙n上先映射公共搜索空间集合中的所有的PDCCH候选；然后，再按照下面的顺序对用户特定搜索空间集合映射PDCCH候选：
按照载波索引由低到高的顺序，交替的每个载波映射一个用户特定搜索空间集合中所有需要映射的PDCCH候选；在一个载波内，按照用户特定搜索空间集合由低到高的顺序，映射用户特定搜索空间集合内所有需要映射的PDCCH候选。
更具体的，如图17所示，终端对用户特定搜索空间集合映射PDCCH候选按照下面的顺序进行PDCCH候选的映射：
首先映射载波索引1(CC1)对应的USS set 3内所有需要映射的PDCCH候选；然后，映射载波索引2(CC 2)对应的USS set 3内所有需要映射的PDCCH候选；再次，映射载波索引1(CC1)对应的USS set 4内所有需要映射的PDCCH候选；最后，映射载波索引2(CC2)对应的USS set 4内所有需要映射的PDCCH候选。
本实施例中，映射的PDCCH候选需要保证不超过终端的信道估计能力和/或盲检测数目能力。
本实施例中，终端的PDCCH盲检测限制在映射的PDCCH候选对应的PDCCH候选集合内。
实施例五：
本实施例在实施例一和/或实施例二的基础上，对本公开的的方案做进一步的示例说明。
在基站侧：
本实施例中，基站配置的用户特定搜索空间集合包含第一套用户特定搜索空间集合和第二套用户特定搜索空间集合；使用第一规则在第一套用户特定搜索空间集合中映射PDCCH候选；使用第二规则在第二套用户特定搜索空间集合中映射PDCCH候选。
应当理解的是，基站根据基站高层参数的配置，配置用户特定搜索空间集合。
上述基站配置的用户特定搜索空间集合包含第一套用户特定搜索空间集合和第二套用户特定搜索空间集合，可以是以下情况实现的配置：
1.有些基站为其归属终端配置的特定搜索空间集合属于第一套用户特定搜索空间集合，另外一些基站为其归属的终端配置的特定搜索空间集合属于第二套用户特定搜索空间集合。
2.一个基站为多个终端配置的多个用户特定搜索空间集合，包含第一套用户特定搜索空间集合和第二套用户特定搜索空间集合。
3.一个基站为一个终端配置的多个用户特定搜索空间集合，包含第一套用户特定搜索空间集合和第二套用户特定搜索空间集合。
本实施例中，基站为一个终端配置多个用户特定搜索空间集合，可能同时包含第一套用户特定搜索空间集合和第二套用户特定搜索空间集合。
本实施例中，一个时隙内PDCCH监测时刻的数目等于1的所有用户特定搜 索空间集合可以定义为第一套用户特定搜索空间集合；一个时隙内PDCCH监测时刻数目大于1的所有用户特定搜索空间集合可以定义为第二套用户特定搜索空间集合。
事实上，基站在分配用户特定搜索空间集合时，存在一个时隙内只有一个PDCCH监测时刻的用户特定搜索空间集合，以及一个时隙内多于一个PDCCH监测时刻的用户特定搜索空间集合。针对非URLLC(Ultra-Reliable and Low Latency Communications，超可靠低延迟通信)业务而言，其实时性要求不高，因此可以分配用户特定搜索空间集合可以是在一个时隙内只有一个PDCCH监测时刻的用户特定搜索空间集合(即第一用户特定搜索空间集合)；而对于URLLC业务，由于其具有很高的实时性要求，为了保证在选择过程中对应URLLC业务的用户特定搜索空间集合不会被全部丢掉，因此可以分配一个时隙内多于一个PDCCH监测时刻的用户特定搜索空间集合(即第二用户特定搜索空间集合)。
第一套用户特定搜索空间集合和第二套用户特定搜索空间集合的划分如图3所示。在图3中，包含一个公共搜索空间集合和三个用户特定搜索空间集合。第一套用户特定搜索空间集合包含用户特定搜索空间集合USS set 2和用户特定搜索空间集合USS set 3。第二套用户特定搜索空间集合包含用户特定搜索空间集合USS set 1。以USS set 1为例，包含两个PDCCH监测时刻，即occasion 0和occasion 1。在每个PDCCH监测时刻，包含2个聚合级别为1的PDCCH候选和4个聚合级别为2的PDCCH候选；一个聚合级别为1的PDCCH候选，由1个控制信道单元组成，一个聚合级别为2的PDCCH候选，由2个CCE组成。
本实施例中，一个PDCCH监测时刻包括1个或多个PDCCH时域符号(即PDCCH起始符号)，不同PDCCH监测时刻的PDCCH起始符号不同，不同PDCCH候选监测时刻之间可以存在重叠的时域符号。不同PDCCH候选的时频资源位置可以存在重叠。
本实施例中，映射一个时隙上所有公共搜索空间集合中的所有PDCCH候选后，再对用户特定搜索空间集合映射的PDCCH候选。
本实施例中，一个时隙上，对于属于第一套用户特定搜索空间集合中的用户特定搜索空间集合，PDCCH候选映射使用第一规则。第一规则为：对于第一套用户特定搜索空间集合中的用户特定搜索空间集合，映射一个时隙上所述用户特定搜索空间集合中的所有PDCCH候选；即对于一个时隙上属于第一套搜索空间集合中的一个搜索空间集合中的PDCCH候选，要么全部映射，要么全部都不映射。
一个时隙上，对于属于第二套用户特定搜索空间集合中的用户特定搜索空 间集合，映射PDCCH候选使用第二规则。第二规则的特点是，对于第二套用户特定搜索空间集合中的一个用户特定搜索空间集合，可以只映射该用户特定搜索空间集合中部分PDCCH候选。
本实施例中，映射的PDCCH候选需要保证不超过终端的信道估计能力(CCE的处理门限值)和/或盲检测数目能力(PDCCH候选处理门限值)。
本实施例中，基站在所选择的映射的PDCCH候选上选择一个或多个PDCCH候选来作为PDCCH信道承载下行控制信息，并发送给终端。
在终端侧：
本实施例中，基站配置的用户特定搜索空间集合包含第一套用户特定搜索空间集合和第二套用户特定搜索空间集合；使用第一规则在第一套用户特定搜索空间集合中映射PDCCH候选；使用第二规则在第二套用户特定搜索空间集合中映射PDCCH候选。
应当理解的是，终端是根据基站高层参数的配置，来确定用户特定搜索空间集合的。
上述基站配置的用户特定搜索空间集合包含第一套用户特定搜索空间集合和第二套用户特定搜索空间集合，可以是以下情况实现的配置：
1.有些基站为其归属终端配置的特定搜索空间集合属于第一套用户特定搜索空间集合，另外一些基站为其归属的终端配置的特定搜索空间集合属于第二套用户特定搜索空间集合。
2.一个基站为多个终端配置的多个用户特定搜索空间集合，包含第一套用户特定搜索空间集合和第二套用户特定搜索空间集合。
3.一个基站为一个终端配置的多个用户特定搜索空间集合，包含第一套用户特定搜索空间集合和第二套用户特定搜索空间集合。
本实施例中，基站为一个终端配置多个用户特定搜索空间集合，可能同时包含第一套用户特定搜索空间集合和第二套用户特定搜索空间集合。
本实施例中，一个时隙内PDCCH监测时刻的数目等于1的所有用户特定搜索空间集合可以定义为第一套用户特定搜索空间集合；一个时隙内PDCCH监测时刻数目大于1的所有用户特定搜索空间集合可以定义为第二套用户特定搜索空间集合。
第一套用户特定搜索空间集合和第二套用户特定搜索空间集合的划分如图3所示。在图3中，包含一个公共搜索空间集合和三个用户特定搜索空间集合。第一套用户特定搜索空间集合包含用户特定搜索空间集合USS set 2和用户特定 搜索空间集合USS set 3。第二套用户特定搜索空间集合包含用户特定搜索空间集合USS set 1。以USS set 1为例，包含两个PDCCH监测时刻，即occasion 0和occasion 1。在每个PDCCH监测时刻，包含2个聚合级别为1的PDCCH候选和4个聚合级别为2的PDCCH候选；一个聚合级别为1的PDCCH候选，由1个控制信道单元组成，一个聚合级别为2的PDCCH候选，由2个CCE组成。
本实施例中，一个PDCCH监测时刻包括1个或多个PDCCH时域符号(即PDCCH起始符号)，不同PDCCH监测时刻的PDCCH起始符号不同，不同PDCCH候选监测时刻之间可以存在重叠的时域符号。不同PDCCH候选的时频资源位置可以存在重叠。
本实施例中，终端映射一个时隙上所有公共搜索空间集合中的所有PDCCH候选后，再对用户特定搜索空间集合映射PDCCH候选。
本实施例中，一个时隙上，对于属于第一套用户特定搜索空间集合中的用户特定搜索空间集合，PDCCH候选映射使用第一规则。第一规则为：对于第一套用户特定搜索空间集合中的用户特定搜索空间集合，映射一个时隙上所述用户特定搜索空间集合中的所有PDCCH候选；即对于一个时隙上属于第一套搜索空间集合中的一个搜索空间集合中的PDCCH候选，要么全部映射，要么全部都不映射。
一个时隙上，对于属于第二套用户特定搜索空间集合中的用户特定搜索空间集合，映射PDCCH候选使用第二规则。第二规则的特点是，对于第二套搜索空间集合中的一个搜索空间集合，可以只映射该搜索空间集合中部分PDCCH候选。
本实施例中，映射的PDCCH候选需要保证不超过终端的信道估计能力和/或盲检测数目能力。
根据上述原则映射的PDCCH候选后，终端的PDCCH盲检测限制在映射的PDCCH候选对应的PDCCH候选集合内。
实施例六：
本实施例在实施例五的基础上，对本公开的的方案做进一步的示例说明。
在基站侧：
本实施例中，基站为终端配置多个用户特定搜索空间集合，包含第一套用户特定搜索空间集合和第二套用户特定搜索空间集合。
本实施例中，一个时隙上，对于属于第一套用户特定搜索空间集合中的第 一用户特定搜索空间集合，映射PDCCH候选时使用第一规则。第一规则为：对于第一套用户特定搜索空间集合中的用户特定搜索空间集合，映射一个时隙上所述用户特定搜索空间集合中的所有PDCCH候选；即对于一个时隙上属于第一套搜索空间集合中的一个搜索空间集合中的PDCCH候选，要么全部映射，要么全部都不映射。
一个时隙上，对于属于第二套用户特定搜索空间集合中的用户特定搜索空间集合，映射PDCCH候选使用第二规则。第二规则为，对于一个时隙内第二套用户特定搜索空间集合中的任意一个第二用户特定搜索空间集合，映射PDCCH候选基于下述任意规则进行：
1.基于交织的PDCCH监测时刻索引顺序，映射第二用户特定搜索空间集合在一个PDCCH监测时刻上的所有PDCCH候选。
2.基于由小到大的PDCCH监测时刻索引顺序，映射第二用户特定搜索空间集合在一个PDCCH监测时刻上的所有PDCCH候选。
本实施例中，基站为终端配置的搜索空间集合包含公共搜索空间集合和用户特定搜索空间集合。本实施例中，在映射时，先映射一个时隙上公共搜索空间集合中的所有PDCCH候选，再对用户特定搜索空间集合映射PDCCH候选。
例如参见图5和图6所示，设在载波c上有用户特定搜索空间集合USS set s，USS set s相关配置如下：
PDCCH监测周期为1个时隙；PDCCH监测时隙上有4个PDCCH监测时刻(即指示4个PDCCH监测(起始)符号位置)；聚合级别AL1包含4个PDCCH候选；聚合级别AL2包含4个PDCCH候选。
应当理解的是，对于上述配置的PDCCH监测时刻，一个PDCCH监测时刻包括1个或多个PDCCH时域符号，不同PDCCH监测时刻的PDCCH起始符号不同，不同PDCCH候选监测时刻之间可以存在重叠的PDCCH时域符号。
本实施例中，先映射公共搜索空间集合中的所有的PDCCH候选，再对USS set s之前需要映射的用户特定搜索空间集合中的PDCCH候选进行映射，再对载波c上的USS set s映射PDCCH候选。
设USS set s为第二用户特定搜索空间集合，则PDCCH候选映射使用第二规则。
设第二规则为：按照PDCCH监测时刻索引顺序(或起始符号索引)由低到高的顺序映射USS set s在一个PDCCH监测时刻对应的所有PDCCH候选。如图5所示。在图5中，按照occasion0-occasion3的顺序依次映射各occasion对应的所有PDCCH候选。设在第二次映射后即达到了终端的信道估计的CCE数 目和/或PDCCH盲检测数目，则停止映射，不再进行映射，此时映射效果可以参见图5所示(有阴影的为映射的PDCCH候选)，occasion2和occasion3对应的PDCCH候选即没有映射。
又设第二规则为：按照交织的PDCCH监测时刻索引(或起始符号索引)顺序映射USS set s在一个PDCCH监测时刻对应的所有PDCCH候选。如图6所示。在图6中，按照occasion0-occasion2-occasion1-occasion3的顺序依次映射各occasion对应的所有PDCCH候选。设在第二次映射后即达到了终端的信道估计的CCE数目和/或PDCCH盲检测数目，则停止映射，不再进行映射，此时映射效果可以参见图6所示(有阴影的为映射的PDCCH候选)，occasion1和occasion3对应的PDCCH候选即没有映射。
本实施例的，对于图6中交织的PDCCH监测时刻索引顺序，基站通过下述方式获得：
1.PDCCH监测时刻索引0～3按行写入2行的交织矩阵，结果如下：
0 1
2 3
2.按列读出PDCCH监测时刻索引为0,2,1,3。则交织后的PDCCH监测时刻索引为0,2,1,3。
本实施例中，映射的PDCCH候选需要保证不超过终端的信道估计能力(CCE的处理门限值)和/或盲检测数目能力(PDCCH候选处理门限值)。
本实施例中，基站在所选择的映射的PDCCH候选上选择一个或多个PDCCH候选来作为PDCCH信道承载下行控制信息，并发送给终端。
在终端侧：
本实施例中，终端确定多个用户特定搜索空间集合，包含第一套用户特定搜索空间集合和第二套用户特定搜索空间集合。
本实施例中，一个时隙上，对于属于第一套用户特定搜索空间集合中的第一用户特定搜索空间集合，映射PDCCH候选时使用第一规则。第一规则为：对于第一套用户特定搜索空间集合中的用户特定搜索空间集合，映射一个时隙上所述用户特定搜索空间集合中的所有PDCCH候选；即对于一个时隙上属于第一套搜索空间集合中的一个搜索空间集合中的PDCCH候选，要么全部映射，要么全部都不映射。
一个时隙上，对于属于第二套用户特定搜索空间集合中的用户特定搜索空 间集合，映射PDCCH候选使用第二规则。第二规则为，对于一个时隙内第二套用户特定搜索空间集合中的任意一个第二用户特定搜索空间集合，映射PDCCH候选基于下述任意规则进行：
1.基于交织的PDCCH监测时刻索引顺序，映射第二用户特定搜索空间集合在一个PDCCH监测时刻上的所有PDCCH候选；
2.基于由小到大的PDCCH监测时刻索引顺序，映射第二用户特定搜索空间集合在一个PDCCH监测时刻上的所有PDCCH候选。
本实施例中，基站为终端配置的搜索空间集合包含公共搜索空间集合和用户特定搜索空间集合。本实施例中，在映射时，先映射一个时隙上公共搜索空间集合中的所有PDCCH候选，再对用户特定搜索空间集合映射PDCCH候选。
例如参见图5和图6所示，设在载波c上有用户特定搜索空间集合USS set s，USS set s相关配置如下：
PDCCH监测周期为1个时隙；PDCCH监测时隙上有4个PDCCH监测时刻(即指示4个PDCCH监测(起始)符号位置)；聚合级别AL1包含4个PDCCH候选；聚合级别AL2包含4个PDCCH候选。
应当理解的是，对于上述配置的PDCCH监测时刻，一个PDCCH监测时刻包括1个或多个PDCCH时域符号，不同PDCCH监测时刻的PDCCH起始符号不同，不同PDCCH候选监测时刻之间可以存在重叠的PDCCH时域符号。
本实施例中，先映射公共搜索空间集合中的所有的PDCCH候选，再对USS set s之前需要映射的用户特定搜索空间集合中的PDCCH候选进行映射，再对载波c上的USS set s映射PDCCH候选。
设USS set s为第二用户特定搜索空间集合，则PDCCH候选映射使用第二规则。
设第二规则为；按照PDCCH监测时刻索引顺序(或起始符号索引)由低到高的顺序映射USS set s在一个PDCCH监测时刻对应的所有PDCCH候选。如图5所示。在图5中，按照occasion0-occasion3的顺序依次映射各occasion对应的所有PDCCH候选。设在第二次映射后即达到了终端的信道估计的CCE数目和/或PDCCH盲检测数目，则停止映射，不再进行映射，此时映射效果可以参见图5所示(有阴影的为映射的PDCCH候选)，occasion2和occasion3对应的PDCCH候选即没有映射。
又设第二规则为；按照交织的PDCCH监测时刻索引(或起始符号索引)顺序映射USS set s在一个PDCCH监测时刻对应的所有PDCCH候选。如图6所示。在图6中，按照occasion0-occasion2-occasion1-occasion3的顺序依次映射各 occasion对应的所有PDCCH候选。设在第二次映射后即达到了终端的信道估计的CCE数目和/或PDCCH盲检测数目，则停止映射，不再进行映射，此时映射效果可以参见图6所示(有阴影的为映射的PDCCH候选)，occasion1和occasion3对应的PDCCH候选即没有映射。
本实施例的，对于图6中交织的PDCCH监测时刻索引顺序，基站通过下述方式获得：
1.PDCCH监测时刻索引0～3按行写入2行的交织矩阵，结果如下：
0 1
2 3
2.按列读出PDCCH监测时刻索引为0,2,1,3。则交织后的PDCCH监测时刻索引为0,2,1,3。
本实施例中，映射的PDCCH候选需要保证不超过终端的信道估计能力和/或盲检测数目能力。
根据上述原则映射的PDCCH候选后，终端的PDCCH盲检测限制在映射的PDCCH候选对应的PDCCH候选集合内。
实施例七：
本实施例在实施例五的基础上，对本公开的的方案做进一步的示例说明。
在基站侧：
本实施例中，基站为终端配置多个用户特定搜索空间集合，包含第一套用户特定搜索空间集合和第二套用户特定搜索空间集合。
本实施例中，一个时隙上，对于属于第一套用户特定搜索空间集合中的第一用户特定搜索空间集合，映射PDCCH候选时使用第一规则。第一规则为：对于第一套用户特定搜索空间集合中的用户特定搜索空间集合，映射一个时隙上所述用户特定搜索空间集合中的所有PDCCH候选；即对于一个时隙上属于第一套搜索空间集合中的一个搜索空间集合中的PDCCH候选，要么全部映射，要么全部都不映射。
对于属于第二套用户特定搜索空间集合中的用户特定搜索空间集合，映射PDCCH候选使用第二规则。第二规则为，基于聚合级别由高到低的顺序映射一个搜索空间集合在一个聚合级别上的所有PDCCH候选。
本实施例中，基站为终端配置的搜索空间集合包含公共搜索空间集合和用户特定搜索空间集合。本实施例中，在映射时，先映射一个时隙上公共搜索空间集合中的所有PDCCH候选，再对用户特定搜索空间集合映射PDCCH候选。
例如参见图7所示，设在载波c上有用户特定搜索空间集合USS set s，USS set s相关配置如下：
PDCCH监测周期为1个时隙；PDCCH监测时隙上有2个PDCCH监测时刻(即指示2个PDCCH监测(起始)符号位置)；聚合级别AL1包含4个PDCCH候选；聚合级别AL2包含4个PDCCH候选；聚合级别AL4包含2个PDCCH候选。
应当理解的是，对于上述配置的PDCCH监测时刻，一个PDCCH监测时刻包括1个或多个PDCCH时域符号，不同PDCCH监测时刻的PDCCH起始符号不同，不同PDCCH候选监测时刻之间可以存在重叠的PDCCH时域符号。
本实施例中，先映射公共搜索空间集合中的所有的PDCCH候选，再对USS set s之前需要映射的用户特定搜索空间集合中的PDCCH候选进行映射，再对载波c上的USS set s映射PDCCH候选。假设时隙n为载波c对应的USS set s的PDCCH检测时隙。设USS set s为第二用户特定搜索空间集合，则PDCCH候选映射使用第二规则。
第二规则为，基于聚合级别由高到低的顺序映射USS set s在一个聚合级别上的所有PDCCH候选。对于一个时隙上的、一个聚合级别对应的USS set s中的PDCCH候选，要么全部映射，要么全部都不映射。如图7所示，在图7中，先对聚合级别4(AL4)的PDCCH候选映射，再对AL2的PDCCH候选映射；再对AL1的PDCCH候选映射。设当前还可映射的PDCCH候选值为12个，则在对USS set s中的AL2进行PDCCH候选映射后，如果再继续映射PDCCH候选，则终端的信道估计的CCE数目和/或PDCCH盲检测数目超过门限值，终止PDCCH候选的映射。此时映射效果可以参见图7所示(有阴影的为映射的PDCCH候选)。
本实施例中，映射的PDCCH候选需要保证不超过终端的信道估计能力(CCE的处理门限值)和/或盲检测数目能力(PDCCH候选处理门限值)。
本实施例中，基站在所选择的映射的PDCCH候选上选择一个或多个PDCCH候选来作为PDCCH信道承载下行控制信息，并发送给终端。
在终端侧：
本实施例中，终端确定多个用户特定搜索空间集合，包含第一套用户特定搜索空间集合和第二套用户特定搜索空间集合。
本实施例中，一个时隙上，对于属于第一套用户特定搜索空间集合中的第一用户特定搜索空间集合，映射PDCCH候选时使用第一规则。第一规则为：对于第一套用户特定搜索空间集合中的用户特定搜索空间集合，映射一个时隙上所述用户特定搜索空间集合中的所有PDCCH候选；即对于一个时隙上属于第一套搜索空间集合中的一个搜索空间集合中的PDCCH候选，要么全部映射，要么全部都不映射。
对于属于第二套用户特定搜索空间集合中的用户特定搜索空间集合，映射PDCCH候选使用第二规则。第二规则为，基于聚合级别由高到低的顺序映射一个搜索空间集合在一个聚合级别上的所有PDCCH候选。
本实施例中，基站为终端配置的搜索空间集合包含公共搜索空间集合和用户特定搜索空间集合。本实施例中，在映射时，先映射一个时隙上公共搜索空间集合中的所有PDCCH候选，再对用户特定搜索空间集合映射PDCCH候选。
例如参见图7所示，设在载波c上有用户特定搜索空间集合USS set s，USS set s相关配置如下：
PDCCH监测周期为1个时隙；PDCCH监测时隙上有2个PDCCH监测时刻(即指示2个PDCCH监测(起始)符号位置)；聚合级别AL1包含4个PDCCH候选；聚合级别AL2包含4个PDCCH候选；聚合级别AL4包含2个PDCCH候选。
应当理解的是，对于上述配置的PDCCH监测时刻，一个PDCCH监测时刻包括1个或多个PDCCH时域符号，不同PDCCH监测时刻的PDCCH起始符号不同，不同PDCCH候选监测时刻之间可以存在重叠的PDCCH时域符号。
本实施例中，先映射公共搜索空间集合中的所有的PDCCH候选，再对USSset s之前需要映射的用户特定搜索空间集合中的PDCCH候选进行映射，再对载波c上的USS set s映射PDCCH候选。假设时隙n为载波c对应的USS set s的PDCCH检测时隙。设USS set s为第二用户特定搜索空间集合，则PDCCH候选映射使用第二规则。
第二规则为，基于聚合级别由高到低的顺序映射USS set s在一个聚合级别上的所有PDCCH候选。对于一个时隙上的、一个聚合级别对应的USS set s中的PDCCH候选，要么全部映射，要么全部都不映射。如图7所示，在图7中，先对聚合级别4(AL4)的PDCCH候选映射，再对AL2的PDCCH候选映射；再对AL1的PDCCH候选映射。设当前还可映射的PDCCH候选值为12个，则在对USS set s中的AL2进行PDCCH候选映射后，如果再继续映射PDCCH候选，则终端的信道估计的CCE数目和/或PDCCH盲检测数目超过门限值，终止 PDCCH候选的映射。
本实施例中，映射的PDCCH候选需要保证不超过终端的信道估计能力和/或盲检测数目能力。
根据上述原则映射的PDCCH候选后，终端的PDCCH盲检测限制在映射的PDCCH候选对应的PDCCH候选集合内。
实施例八：
本实施例在实施例五的基础上，对本公开的的方案做进一步的示例说明。
在基站侧：
本实施例中，基站为终端配置多个用户特定搜索空间集合，包含第一套用户特定搜索空间集合和第二套用户特定搜索空间集合。
本实施例中，一个时隙上，对于属于第一套用户特定搜索空间集合中的第一用户特定搜索空间集合，映射PDCCH候选时使用第一规则。第一规则为：对于第一套用户特定搜索空间集合中的用户特定搜索空间集合，映射一个时隙上所述用户特定搜索空间集合中的所有PDCCH候选；即对于一个时隙上属于第一套搜索空间集合中的一个搜索空间集合中的PDCCH候选，要么全部映射，要么全部都不映射。
对于属于第二套用户特定搜索空间集合中的用户特定搜索空间集合，映射PDCCH候选使用第二规则。第二规则为，在一个时隙内对一个搜索空间集合映射PDCCH候选，基于：
按照聚合级别由高到低的顺序，映射完上一个聚合级别所有需要映射的PDCCH候选，再对下一个聚合级别映射PDCCH候选。
对于一个映射PDCCH候选的聚合级别，按照下述方式之一对该聚合级别进行PDCCH候选映射：
1.基于交织的DCCH监测时刻索引顺序；
2.基于由小到大的PDCCH监测时刻索引顺序；
3.基于由大到小的PDCCH监测时刻索引顺序；
4.基于交织的PDCCH起始符号索引顺序；
5.基于PDCCH起始符号索引由小到大的顺序；
6.基于PDCCH起始符号索引由大到小的顺序。
本实施例中，基站为终端配置的搜索空间集合包含公共搜索空间集合和用户特定搜索空间集合。本实施例中，在映射时，先映射一个时隙上公共搜索空间集合中的所有PDCCH候选，再对用户特定搜索空间集合映射PDCCH候选。
例如参见图8和图9所示，设在载波c上有用户特定搜索空间集合USS set s，USS set s相关配置如下：
PDCCH监测周期为1个时隙；PDCCH监测时隙上有4个PDCCH监测时刻(即指示4个PDCCH监测(起始)符号位置)；聚合级别AL1包含4个PDCCH候选；聚合级别AL2包含4个PDCCH候选。
应当理解的是，对于上述配置的PDCCH监测时刻，一个PDCCH监测时刻包括1个或多个PDCCH时域符号，不同PDCCH监测时刻的PDCCH起始符号不同，不同PDCCH候选监测时刻之间可以存在重叠的PDCCH时域符号。
本实施例中，先映射公共搜索空间集合中的所有的PDCCH候选，再对USS set s之前需要映射的用户特定搜索空间集合中的PDCCH候选进行映射，再对载波c上的USS set s映射PDCCH候选。假设时隙n为载波c对应的USS set s的PDCCH检测时隙。设USS set s为第二用户特定搜索空间集合，则PDCCH候选映射使用第二规则。
设第二规则为：按照聚合级别由高到低的顺序，映射完上一个聚合级别所有需要映射的PDCCH候选，再对下一个聚合级别映射PDCCH候选；对于一个映射PDCCH候选的聚合级别，基于由小到大的PDCCH监测时刻索引顺序，对USS set s中该聚合级别在所述PDCCH监测时刻上的所有PDCCH候选进行映射。如图8所示，图8中PDCCH候选集合的数字编号表示映射PDCCH候选的顺序。在图8中，先对AL2映射PDCCH候选，映射时按照各AL2 PDCCH候选对应的occasion，按occasion0-occasion3的顺序映射；再对AL1映射PDCCH候选，映射时按照各AL1PDCCH候选对应的occasion，按occasion0-occasion3的顺序映射。设当前还可映射的PDCCH候选值为24个，则在对USS set s中的AL2进行PDCCH候选映射后，再继续映射AL1的PDCCH候选，映射到occasion1后，终端的信道估计的CCE数目和/或PDCCH盲检测数目达到门限值，终止PDCCH候选的映射。此时映射效果可以参见图8所示(有阴影的为映射的PDCCH候选)。
设第二规则为：按照聚合级别由高到低的顺序，映射完上一个聚合级别所有需要映射的PDCCH候选，再对下一个聚合级别映射PDCCH候选；对于一个映射PDCCH候选的聚合级别，基于交织的PDCCH监测时刻索引顺序，对USS set s中该聚合级别在所述PDCCH监测时刻上的所有PDCCH候选进行映射。本实施例中，通过交织矩阵获得交织的PDCCH监测时刻索引顺序为0、2、1、3。 如图9所示，图9中PDCCH候选集合的数字编号表示映射PDCCH候选的顺序。在图9中，先对AL2映射PDCCH候选，映射时按照各AL2PDCCH候选对应的occasion，按occasion0-occasion2-occasion1-occasion3的顺序映射；再对AL1映射PDCCH候选，映射时按照各AL1PDCCH候选对应的occasion，按occasion0-occasion2-occasion1-occasion3的顺序映射。设当前还可映射的PDCCH候选值为24个，则在对USS set s中的AL2进行PDCCH候选映射后，再继续映射AL1的PDCCH候选，映射到occasion2后，终端的信道估计的CCE数目和/或PDCCH盲检测数目达到门限值，终止PDCCH候选的映射。此时映射效果可以参见图9所示(有阴影的为映射的PDCCH候选)，occasion1和occasion3中的AL1的PDCCH候选即没有映射。
本实施例中，映射的PDCCH候选需要保证不超过终端的信道估计能力(CCE的处理门限值)和/或盲检测数目能力(PDCCH候选处理门限值)。
本实施例中，基站在所选择的映射的PDCCH候选上选择一个或多个PDCCH候选来作为PDCCH信道承载下行控制信息，并发送给终端。
在终端侧：
本实施例中，终端确定多个用户特定搜索空间集合，包含第一套用户特定搜索空间集合和第二套用户特定搜索空间集合。
本实施例中，一个时隙上，对于属于第一套用户特定搜索空间集合中的第一用户特定搜索空间集合，映射PDCCH候选时使用第一规则。第一规则为：对于第一套用户特定搜索空间集合中的用户特定搜索空间集合，映射一个时隙上所述用户特定搜索空间集合中的所有PDCCH候选；即对于一个时隙上属于第一套搜索空间集合中的一个搜索空间集合中的PDCCH候选，要么全部映射，要么全部都不映射。
对于属于第二套用户特定搜索空间集合中的用户特定搜索空间集合，映射PDCCH候选使用第二规则。第二规则为，在一个时隙内对一个搜索空间集合映射PDCCH候选，基于：
按照聚合级别由高到低的顺序，映射完上一个聚合级别所有需要映射的PDCCH候选，再对下一个聚合级别映射PDCCH候选。
对于一个映射PDCCH候选的聚合级别，按照下述方式之一对该聚合级别进行PDCCH候选映射：
1.基于交织的DCCH监测时刻索引顺序；
2.基于由小到大的PDCCH监测时刻索引顺序；
3.基于由大到小的PDCCH监测时刻索引顺序
4.基于交织的PDCCH起始符号索引顺序；
5.基于PDCCH起始符号索引由小到大的顺序；
6.基于PDCCH起始符号索引由大到小的顺序。
本实施例中，基站为终端配置的搜索空间集合包含公共搜索空间集合和用户特定搜索空间集合。本实施例中，在映射时，先映射一个时隙上公共搜索空间集合中的所有PDCCH候选，再对用户特定搜索空间集合映射PDCCH候选。
例如参见图8和图9所示，设在载波c上有用户特定搜索空间集合USS set s，USS set s相关配置如下：
PDCCH监测周期为1个时隙；PDCCH监测时隙上有4个PDCCH监测时刻(即指示4个PDCCH监测(起始)符号位置)；聚合级别AL1包含4个PDCCH候选；聚合级别AL2包含4个PDCCH候选。
应当理解的是，对于上述配置的PDCCH监测时刻，一个PDCCH监测时刻包括1个或多个PDCCH时域符号，不同PDCCH监测时刻的PDCCH起始符号不同，不同PDCCH候选监测时刻之间可以存在重叠的PDCCH时域符号。
本实施例中，先映射公共搜索空间集合中的所有的PDCCH候选，再对USS set s之前需要映射的用户特定搜索空间集合中的PDCCH候选进行映射，再对载波c上的USS set s映射PDCCH候选。假设时隙n为载波c对应的USS set s的PDCCH检测时隙。设USS set s为第二用户特定搜索空间集合，则PDCCH候选映射使用第二规则。
设第二规则为：按照聚合级别由高到低的顺序，映射完上一个聚合级别所有需要映射的PDCCH候选，再对下一个聚合级别映射PDCCH候选；对于一个映射PDCCH候选的聚合级别，基于由小到大的PDCCH监测时刻索引顺序，对USS set s中该聚合级别在所述PDCCH监测时刻上的所有PDCCH候选进行映射。如图8所示，图8中PDCCH候选集合的数字编号表示映射PDCCH候选的顺序。在图8中，先对AL2映射PDCCH候选，映射时按照各AL2PDCCH候选对应的occasion，按occasion0-occasion3的顺序映射；再对AL1映射PDCCH候选，映射时按照各AL1PDCCH候选对应的occasion，按occasion0-occasion3的顺序映射。设当前还可映射的PDCCH候选值为24个，则在对USS set s中的AL2进行PDCCH候选映射后，再继续映射AL1的PDCCH候选，映射到occasion1后，终端的信道估计的CCE数目和/或PDCCH盲检测数目达到门限值，终止PDCCH候选的映射。此时映射效果可以参见图8所示(有阴影的为映射的PDCCH候选)。
设第二规则为：按照聚合级别由高到低的顺序，映射完上一个聚合级别所有需要映射的PDCCH候选，再对下一个聚合级别映射PDCCH候选；对于一个映射PDCCH候选的聚合级别，基于交织的PDCCH监测时刻索引顺序，对USS set s中该聚合级别在所述PDCCH监测时刻上的所有PDCCH候选进行映射。本实施例中，通过交织矩阵获得交织的PDCCH监测时刻索引顺序为0、2、1、3。如图9所示，图9中PDCCH候选集合的数字编号表示映射PDCCH候选的顺序。在图9中，先对AL2映射PDCCH候选，映射时按照各AL2PDCCH候选对应的occasion，按occasion0-occasion2-occasion1-occasion3的顺序映射；再对AL1映射PDCCH候选，映射时按照各AL1 PDCCH候选对应的occasion，按occasion0-occasion2-occasion1-occasion3的顺序映射。设当前还可映射的PDCCH候选值为24个，则在对USS set s中的AL2进行PDCCH候选映射后，再继续映射AL1的PDCCH候选，映射到occasion2后，终端的信道估计的CCE数目和/或PDCCH盲检测数目达到门限值，终止PDCCH候选的映射。此时映射效果可以参见图9所示(有阴影的为映射的PDCCH候选)，occasion1和occasion3中的AL1的PDCCH候选即没有映射。
本实施例中，映射的PDCCH候选需要保证不超过终端的信道估计能力和/或盲检测数目能力。
根据上述原则映射的PDCCH候选后，终端的PDCCH盲检测限制在映射的PDCCH候选对应的PDCCH候选集合内。
实施例九：
本实施例在实施例五的基础上，对本公开的的方案做进一步的示例说明。
在基站侧：
本实施例中，基站为终端配置用户特定搜索空间集合，包含第一套用户特定搜索空间集合和第二套用户特定搜索空间集合。使用第一规则在第一套用户特定搜索空间集合中映射PDCCH候选；使用第二规则在第二套用户特定搜索空间集合中映射PDCCH候选。
本实施例中，将第二套用户特定搜索空间集合中的第二用户特定搜索空间集合的PDCCH候选分为第一套PDCCH候选和第二套PDCCH候选。
本实施例中，第一套PDCCH候选由一个第二用户特定搜索空间集合一个时隙内的所有PDCCH监测时刻上各取一个最高聚合级别对应的PDCCH候选组成。例如参见图10所示，第一套PDCCH候选对应编号为1-4的4个PDCCH候选；第二套PDCCH候选为一个第二用户特定搜索空间集合一个时隙内的所有 PDCCH候选中，除第一套PDCCH候选以外的所有PDCCH候选。在图10中，第二套PDCCH候选对应除编号为1～4的4个PDCCH候选以外的28个PDCCH候选。
对于属于第一套用户特定搜索空间集合中的第一用户特定搜索空间集合，映射PDCCH候选时使用第一规则。第一规则为：对于第一套用户特定搜索空间集合中的用户特定搜索空间集合，映射一个时隙上所述用户特定搜索空间集合中的所有PDCCH候选；即对于一个时隙上属于第一套搜索空间集合中的一个搜索空间集合中的PDCCH候选，要么全部映射，要么全部都不映射。
对于属于第二套用户特定搜索空间集合中的用户特定搜索空间集合，映射PDCCH候选使用第二规则。第二规则为：使用第三规则在第一套PDCCH候选中映射PDCCH候选；使用第四规则在第二套PDCCH候选中映射PDCCH候选。
第三规则为，基于交织的PDCCH监测时刻索引顺序，依次在所述PDCCH监测时刻映射一个第一套PDCCH候选。根据该规则，如图10所示，第一套PDCCH候选中映射了4个PDCCH候选，且按照编号1-4的顺序映射。
第四规则为，基于交织的PDCCH监测时刻索引顺序，映射所述PDCCH监测时刻上的所有第二套PDCCH候选。
根据该规则，如图10所示，第二套PDCCH候选按照编号5-8的顺序进行映射。设当前还可映射的PDCCH候选值为18个，则在对第一套PDCCH候选映射后，再继续映射第二套PDCCH候选。映射第二套PDCCH候选时，按照occasion0-occasion2-occasion1-occasion3的顺序映射，映射到occasion2后，终端的信道估计的CCE数目和/或PDCCH盲检测数目达到门限值，终止PDCCH候选的映射。此时映射效果可以参见图10所示(有阴影的为映射的PDCCH候选)，编号7和8对应的第二套PDCCH候选不映射。
上述所述交织的PDCCH监测时刻索引，可以通过对PDCCH监测时刻索引按照输入2行的的交织矩阵，并按列读取PDCCH监测时刻索引的方式获得。本实施例中，交织的PDCCH监测时刻索引排序为0、2、1、3。
本实施例中，先映射公共搜索空间集合中的所有的PDCCH候选，再对图10对应的UUS set之前需要映射的用户特定搜索空间集合中的PDCCH候选进行映射，再对图10对应的UUS set映射PDCCH候选。
本实施例中，映射的PDCCH候选需要保证不超过终端的信道估计能力(CCE的处理门限值)和/或盲检测数目能力(PDCCH候选处理门限值)。
本实施例中，基站在所选择的映射的PDCCH候选上选择一个或多个PDCCH候选来作为PDCCH信道承载下行控制信息，并发送给终端。
在终端侧：
本实施例中，终端确定多个用户特定搜索空间集合，，包含第一套用户特定搜索空间集合和第二套用户特定搜索空间集合。使用第一规则在第一套用户特定搜索空间集合中映射PDCCH候选；使用第二规则在第二套用户特定搜索空间集合中映射PDCCH候选。
本实施例中，将第二套用户特定搜索空间集合中的第二用户特定搜索空间集合的PDCCH候选分为第一套PDCCH候选和第二套PDCCH候选。
本实施例中，第一套PDCCH候选由一个第二用户特定搜索空间集合一个时隙内的所有PDCCH监测时刻上各取一个最高聚合级别对应的PDCCH候选组成。例如参见图10所示，第一套PDCCH候选对应编号为1-4的4个PDCCH候选；第二套PDCCH候选为一个第二用户特定搜索空间集合一个时隙内的所有PDCCH候选中，除第一套PDCCH候选以外的所有PDCCH候选。在图10中，第二套PDCCH候选对应除编号为1～4的4个PDCCH候选以外的28个PDCCH候选。
对于属于第一套用户特定搜索空间集合中的第一用户特定搜索空间集合，映射PDCCH候选时使用第一规则。第一规则为：对于第一套用户特定搜索空间集合中的用户特定搜索空间集合，映射一个时隙上所述用户特定搜索空间集合中的所有PDCCH候选；即对于一个时隙上属于第一套搜索空间集合中的一个搜索空间集合中的PDCCH候选，要么全部映射，要么全部都不映射。
对于属于第二套用户特定搜索空间集合中的用户特定搜索空间集合，映射PDCCH候选使用第二规则。第二规则为：使用第三规则在第一套PDCCH候选中映射PDCCH候选；使用第四规则在第二套PDCCH候选中映射PDCCH候选。
第三规则为，基于交织的PDCCH监测时刻索引顺序，依次在所述PDCCH监测时刻映射一个第一套PDCCH候选。根据该规则，如图10所示，第一套PDCCH候选中映射了4个PDCCH候选，且按照编号1-4的顺序映射。
第四规则为，基于交织的PDCCH监测时刻索引顺序，映射所述PDCCH监测时刻上的所有第二套PDCCH候选。根据该规则，如图10所示，第二套PDCCH候选按照编号5-8的顺序进行映射。设当前还可映射的PDCCH候选值为18个，则在对第一套PDCCH候选映射后，再继续映射第二套PDCCH候选。映射第二套PDCCH候选事物，按照occasion0-occasion2-occasion1-occasion3的顺序映射，映射到occasion2后，终端的信道估计的CCE数目和/或PDCCH盲检测数目达到门限值，终止PDCCH候选的映射。此时映射效果可以参见图10所示(有阴影的为映射的PDCCH候选)，编号7和8对应的第二套PDCCH候选不映射。
上述所述交织的PDCCH监测时刻索引，可以通过对PDCCH监测时刻索引按照输入2行的的交织矩阵，并按列读取PDCCH监测时刻索引的方式获得。本实施例中，交织的PDCCH监测时刻索引排序为0、2、1、3。
本实施例中，先映射公共搜索空间集合中的所有的PDCCH候选，再对图10对应的UUS set之前需要映射的用户特定搜索空间集合中的PDCCH候选进行映射，再对图10对应的UUS set映射PDCCH候选。
本实施例中，映射的PDCCH候选需要保证不超过终端的信道估计能力和/或盲检测数目能力。
根据上述原则映射的PDCCH候选后，终端的PDCCH盲检测限制在映射的PDCCH候选对应的PDCCH候选集合内。
实施例十：
本实施例在实施例五的基础上，对本公开的的方案做进一步的示例说明。
在基站侧：
本实施例中，基站为终端配置用户特定搜索空间集合，包含第一套用户特定搜索空间集合和第二套用户特定搜索空间集合。使用第一规则在第一套用户特定搜索空间集合中映射PDCCH候选；使用第二规则在第二套用户特定搜索空间集合中映射PDCCH候选。
本实施例中，将第二套用户特定搜索空间集合中的第二用户特定搜索空间集合的PDCCH候选分为第一套PDCCH候选和第二套PDCCH候选。
本实施例中，第一套PDCCH候选由一个第二用户特定搜索空间集合一个时隙内的所有PDCCH监测时刻上各取一个最高聚合级别对应的PDCCH候选组成。例如参见图10所示，第一套PDCCH候选对应编号为1-4的4个PDCCH候选；第二套PDCCH候选为一个第二用户特定搜索空间集合一个时隙内的所有PDCCH候选中，除第一套PDCCH候选以外的所有PDCCH候选。在图10中，第二套PDCCH候选对应除编号为1～4的4个PDCCH候选以外的28个PDCCH候选。
对于属于第一套用户特定搜索空间集合中的第一用户特定搜索空间集合，映射PDCCH候选时使用第一规则。第一规则为：对于第一套用户特定搜索空间集合中的用户特定搜索空间集合，映射一个时隙上所述用户特定搜索空间集合中的所有PDCCH候选；即对于一个时隙上属于第一套搜索空间集合中的一个搜索空间集合中的PDCCH候选，要么全部映射，要么全部都不映射。
对于属于第二套用户特定搜索空间集合中的用户特定搜索空间集合，映射PDCCH候选使用第二规则。第二规则为：使用第三规则在第一套PDCCH候选中映射PDCCH候选；使用第四规则在第二套PDCCH候选中映射PDCCH候选。
第三规则为，基于交织的PDCCH监测时刻索引顺序，依次在所述PDCCH监测时刻映射一个第一套PDCCH候选。根据该规则，如图10所示，第一套PDCCH候选中映射了4个PDCCH候选，且按照编号1-4的顺序映射。
第四规则为，映射一个时隙上用户特定搜索空间集合中的所有第二套PDCCH候选；即对于一个时隙上属于用户特定搜索空间集合中的的第二套PDCCH候选，要么全部映射，要么全部都不映射。
根据该规则，如图11所示，第二套PDCCH候选(即编号5对应的PDCCH候选)要么都映射，要么都不映射。
上述所述交织的PDCCH监测时刻索引，可以通过对PDCCH监测时刻索引按照输入2行的的交织矩阵，并按列读取PDCCH监测时刻索引的方式获得。本实施例中，交织的PDCCH监测时刻索引排序为0、2、1、3。
本实施例中，先映射公共搜索空间集合中的所有的PDCCH候选，再对图11对应的UUS set之前需要映射的用户特定搜索空间集合中的PDCCH候选进行映射，再对图11对应的UUS set映射PDCCH候选。
本实施例中，映射的PDCCH候选需要保证不超过终端的信道估计能力(CCE的处理门限值)和/或盲检测数目能力(PDCCH候选处理门限值)。
本实施例中，基站在所选择的映射的PDCCH候选上选择一个或多个PDCCH候选来作为PDCCH信道承载下行控制信息，并发送给终端。
本实施例中，映射的PDCCH候选需要保证不超过终端的信道估计能力和/或盲检测数目能力。
根据上述原则映射的PDCCH候选后，终端的PDCCH盲检测限制在映射的PDCCH候选对应的PDCCH候选集合内。
在终端侧：
本实施例中，终端确定多个用户特定搜索空间集合，，包含第一套用户特定搜索空间集合和第二套用户特定搜索空间集合。使用第一规则在第一套用户特定搜索空间集合中映射PDCCH候选；使用第二规则在第二套用户特定搜索空间集合中映射PDCCH候选。
本实施例中，将第二套用户特定搜索空间集合中的第二用户特定搜索空间集合的PDCCH候选分为第一套PDCCH候选和第二套PDCCH候选。
本实施例中，第一套PDCCH候选由一个第二用户特定搜索空间集合一个时隙内的所有PDCCH监测时刻上各取一个最高聚合级别对应的PDCCH候选组成。例如参见图10所示，第一套PDCCH候选对应编号为1-4的4个PDCCH候选；第二套PDCCH候选为一个第二用户特定搜索空间集合一个时隙内的所有PDCCH候选中，除第一套PDCCH候选以外的所有PDCCH候选。在图10中，第二套PDCCH候选对应除编号为1～4的4个PDCCH候选以外的28个PDCCH候选。
对于属于第一套用户特定搜索空间集合中的第一用户特定搜索空间集合，映射PDCCH候选时使用第一规则。第一规则为：对于第一套用户特定搜索空间集合中的用户特定搜索空间集合，映射一个时隙上所述用户特定搜索空间集合中的所有PDCCH候选；即对于一个时隙上属于第一套搜索空间集合中的一个搜索空间集合中的PDCCH候选，要么全部映射，要么全部都不映射。
对于属于第二套用户特定搜索空间集合中的用户特定搜索空间集合，映射PDCCH候选使用第二规则。第二规则为：使用第三规则在第一套PDCCH候选中映射PDCCH候选；使用第四规则在第二套PDCCH候选中映射PDCCH候选。
第三规则为，基于交织的PDCCH监测时刻索引顺序，依次在所述PDCCH监测时刻映射一个第一套PDCCH候选。根据该规则，如图10所示，第一套PDCCH候选中映射了4个PDCCH候选，且按照编号1-4的顺序映射。
第四规则为，映射一个时隙上用户特定搜索空间集合中的所有第二套PDCCH候选；即对于一个时隙上属于用户特定搜索空间集合中的的第二套PDCCH候选，要么全部映射，要么全部都不映射。
根据该规则，如图11所示，第二套PDCCH候选(即编号5对应的PDCCH候选)要么都映射，要么都不映射。
上述所述交织的PDCCH监测时刻索引，可以通过对PDCCH监测时刻索引按照输入2行的的交织矩阵，并按列读取PDCCH监测时刻索引的方式获得。本实施例中，交织的PDCCH监测时刻索引排序为0、2、1、3。
本实施例中，先映射公共搜索空间集合中的所有的PDCCH候选，再对图11对应的UUS set之前需要映射的用户特定搜索空间集合中的PDCCH候选进行映射，再对图11对应的UUS set映射PDCCH候选。
实施例十一：
参见图20，图20为本公开实施例十一提供的一种候选信道映射装置20，包括：用户特定搜索空间集合第一确定模块201和PDCCH候选第一映射模块 202。该候选信道映射装置20可以应用于基站中。
本实施例中，用户特定搜索空间集合第一确定模块201用于确定终端的用户特定搜索空间集合。
在本实施例中，用户特定搜索空间集合包含第一套用户特定搜索空间集合和/或第二套用户特定搜索空间集合。
在本实施例中，第一套用户特定搜索空间集合应当包含有一个或多个第一用户特定搜索空间集合；第二套用户特定搜索空间集合应当包含有一个或多个第二用户特定搜索空间集合。
其中，在确定一个用户特定搜索空间集合为第一用户特定搜索空间集合还是为第二用户特定搜索空间集合时，可以遵循以下两种规则来进行确定：
其一：将在一个时隙内PDCCH监测时刻的数目等于1的用户特定搜索空间集合确定为第一用户特定搜索空间集合；将在一个时隙内PDCCH监测时刻的数目大于1的用户特定搜索空间集合确定为第二用户特定搜索空间集合。
其二：将在一个时隙内PDCCH监测时刻的数目等于1或PDDCH监测周期大于1个时隙的用户特定搜索空间集合确定为第一用户特定搜索空间集合；将在一个时隙内PDCCH监测时刻的数目大于1，且PDDCH监测周期等于1个时隙的用户特定搜索空间集合确定为第二用户特定搜索空间集合。
PDCCH候选第一映射模块202用于使用第一映射规则在第一套用户特定搜索空间集合中映射PDCCH候选；以及使用第二映射规则在第二套用户特定搜索空间集合中映射PDCCH候选。
应当理解的是，本实施例中所述的映射即是指的选择。例如上述“在公共搜索空间集合中映射PDCCH候选”即是指的：在公共搜索空间集合中选择出最终要保留的PDCCH候选。
还需要说明的是，一个用户特定搜索空间集合中的PDCCH候选可以包括一个或一个以上聚合级别的PDCCH候选。
应当理解的是，本实施例中最终映射的PDCCH候选即是最终保留的PDCCH候选。映射的PDCCH候选可以用于承载下行控制信息。
在本实施例中，第一选择规则包括：在从第一套用户特定搜索空间集合中的第一用户特定搜索空间集合中映射PDCCH候选时，将第一用户特定搜索空间集合中的PDCCH候选全部映射，或者将第一用户特定搜索空间集合中的所有PDCCH候选全部不映射。例如以图3中的USS set 2为例，则要么将USS set 2中的两个PDCCH候选全部映射，要么就将USS set 2中的两个PDCCH候选全 部放弃，即都不映射。
在本实施例中，第二选择规则包括：在从第二套用户特定搜索空间集合中的第二用户特定搜索空间集合中映射PDCCH候选时，第二用户特定搜索空间集合中的PDCCH候选根据下述方式中的至少一种进行映射：
方式一：第二用户特定搜索空间集合中的PDCCH候选根据PDCCH监测时刻索引的顺序映射。
具体的，第二用户特定搜索空间集合中的PDCCH候选根据PDCCH监测时刻索引由大到小的顺序映射的PDCCH候选或者，第二用户特定搜索空间集合中的PDCCH候选根据PDCCH监测时刻索引由小到大的顺序选择PDCCH候选映射。或者，第二用户特定搜索空间集合中的PDCCH候选根据PDCCH监测时刻索引交织的顺序选择PDCCH候选映射。
值得注意的是，在根据PDCCH监测时刻索引的顺序进行映射时，可以将一个PDCCH监测时刻索引对应的所有PDCCH候选映射完毕之后，才会映射下一个PDCCH监测时刻索引对应的所有PDCCH候选。
方式二：第二用户特定搜索空间集合中的PDCCH候选根据PDCCH起始符号索引的顺序映射。
应当理解的是，一个PDCCH监测时刻包括1个或多个PDCCH时域符号，不同PDCCH监测时刻的PDCCH起始符号不同，不同PDCCH候选监测时刻之间可以存在重叠的PDCCH时域符号。
在方式二中，其具体的实现方式与方式一类似。具体的，第二用户特定搜索空间集合中的PDCCH候选根据PDCCH起始符号索引由大到小的顺序选择PDCCH候选映射；或者，第二用户特定搜索空间集合中的PDCCH候选根据PDCCH起始符号索引由小到大的顺序选择PDCCH候选映射；或者，第二用户特定搜索空间集合中的PDCCH候选根据PDCCH起始符号索引交织的顺序选择PDCCH候选映射。
值得注意的是，在根据PDCCH起始符号索引的顺序进行映射时，可以将一个PDCCH起始符号索引对应的所有PDCCH候选映射完毕之后，才会映射下一个PDCCH起始符号索引对应的所有PDCCH候选。
方式三：第二用户特定搜索空间集合中的PDCCH候选根据PDCCH候选的聚合级别的顺序映射。
具体的，第二用户特定搜索空间集合中的PDCCH候选根据PDCCH候选的聚合级别由高到低的顺序选择PDCCH候选映射。在进行映射时，可以先将一个聚合级别映射对应的所有PDCCH候选映射完毕之后，再映射下一聚合级别对应 的所有PDCCH候选。
在本实施例中，PDCCH候选第一映射模块202还可以同时采用方式一和方式三从第二套用户特定搜索空间集合中的第二用户特定搜索空间集合中映射PDCCH候选；具体的，可以根据PDCCH候选的聚合级别由高到低的顺序，依次在不同聚合级别中映射PDCCH候选；在进行映射时，将一个聚合级别映射对应的所有PDCCH候选映射完毕之后，再映射下一聚合级别对应的所有PDCCH候选。应当注意的是，在同一聚合级别中，根据所述聚合级别中的所有PDCCH候选对应的PDCCH监测时刻索引，按照PDCCH监测时刻索引由大到小的顺序，或者按照PDCCH监测时刻索引由小到大的顺序，或者按照PDCCH监测时刻索引交织的顺序，映射所述聚合级别中的PDCCH候选；在同一聚合级别的PDCCH候选进行映射时，将一个PDCCH监测时刻索引对应的该聚合级别的所有PDCCH候选映射完毕之后，再映射下一个PDCCH监测时刻索引对应的该聚合级别的所有PDCCH候选。
在本实施例中，PDCCH候选第一映射模块202还可以同时采用方式二和方式三从第二套用户特定搜索空间集合中的第二用户特定搜索空间集合中映射PDCCH候选。与同时采用方式一和方式三从第二套用户特定搜索空间集合中的第二用户特定搜索空间集合中映射PDCCH候选映射类似的，可以根据PDCCH候选的聚合级别由高到低的顺序，依次在不同聚合级别中映射PDCCH候选；在进行映射时，将一个聚合级别映射对应的所有PDCCH候选映射完毕之后，再映射下一聚合级别对应的所有PDCCH候选；而在同一聚合级别中，根据聚合级别中的所有PDCCH候选对应的PDCCH起始符号索引，按照PDCCH起始符号索引由大到小的顺序，或者按照PDCCH起始符号索引由小到大的顺序，或者按照PDCCH起始符号索引交织的顺序，映射所述聚合级别中的PDCCH候选；在同一聚合级别的PDCCH候选进行映射时，将一个PDCCH起始符号索引对应的该聚合级别的所有PDCCH候选映射完毕之后，再映射下一个PDCCH起始符号索引对应的该聚合级别的所有PDCCH候选。
在本实施例中，第二选择规则还可以是：将第二用户特定搜索空间集合中的PDCCH候选划分为第一套PDCCH候选和第二套PDCCH候选，进而使用第三选择规则在第一套PDCCH候选中映射PDCCH候选；使用第四选择规则在第二套PDCCH候选中映射PDCCH候选。
具体的，在本实施例中，PDCCH候选第一映射模块202可以按照以下方式来划分第二用户特定搜索空间集合中的第一套PDCCH候选和第二套PDCCH候选：
对于第一套PDCCH候选可以通过以下方式选取：
1.可以根据PDCCH监测时刻索引顺序从第二用户特定搜索空间集合中的PDCCH候选中选择出第一套PDCCH候选。
具体的，PDCCH候选第一映射模块202可以从所述PDCCH监测时刻索引对应的第二用户特定搜索空间集合中的PDCCH候选中，选择n(n大于等于1)个PDCCH候选构成第一套PDCCH候选。
2.可以根据PDCCH监测时刻索引和PDCCH候选的聚合级别从第二用户特定搜索空间集合中的PDCCH候选中选择出第一套PDCCH候选。
具体的，PDCCH候选第一映射模块202可以从所述PDCCH监测时刻索引对应的第二用户特定搜索空间集合中的PDCCH候选中，选择n(n大于等于1)个聚合级别最高的PDCCH候选构成第一套PDCCH候选。
3.可以根据PDCCH起始符号索引从第二用户特定搜索空间集合中的PDCCH候选中选择出第一套PDCCH候选。
具体的，与上述1类似，PDCCH候选第一映射模块202可以从所述PDCCH起始符号索引对应的第二用户特定搜索空间集合中的PDCCH候选中，选择n(n大于等于1)个PDCCH候选构成第一套PDCCH候选。应当理解的是，此时在各PDCCH起始符号索引对应的PDCCH候选中选取的PDCCH候选所对应的聚合级别没有要求，可以是任意聚合级别的。
4.可以根据PDCCH起始符号索引和PDCCH候选的聚合级别从第二用户特定搜索空间集合中的PDCCH候选中选择出第一套PDCCH候选。
具体的，与上述2类似，PDCCH候选第一映射模块202可以从所述PDCCH起始符号索引对应的第二用户特定搜索空间集合中的PDCCH候选中，选择n(n大于等于1)个聚合级别最高的PDCCH候选构成第一套PDCCH候选。
在本实施的一种具体实施方式中，n可以取1或2。
对于第二套PDCCH候选，PDCCH候选第一映射模块202可以将第二用户特定搜索空间集合中除第一套PDCCH候选之外的其余PDCCH候选作为第二套PDCCH候选。例如参见图10所示，除去第一套PDCCH候选中的四个PDCCH之外剩余的所有PDCCH即构成了第二套PDCCH候选。
在本实施例中，第三选择规则包括：第一套PDCCH候选根据下述方式中的至少一种进行选择：
方式四：第一套PDCCH候选根据PDCCH监测时刻索引的顺序映射。
具体的，第一套PDCCH候选可以根据PDCCH监测时刻索引由大到小的顺序映射PDCCH候选。或者，第一套PDCCH候选根据PDCCH监测时刻索引由 小到大的顺序映射PDCCH候选。或者，第一套PDCCH候选根据PDCCH监测时刻索引交织的顺序映射PDCCH候选。应当理解的是，在进行映射时，可以将一个PDCCH监测时刻索引对应的第一套PDCCH候选中的所有PDCCH候选映射完毕之后，再映射下一个PDCCH监测时刻索引对应的第一套PDCCH候选中的所有PDCCH候选。
方式五：第一套PDCCH候选根据PDCCH起始符号索引的顺序映射。
具体的，与方式四类似，第一套PDCCH候选根据PDCCH起始符号索引由大到小的顺序映射PDCCH候选；或者，第一套PDCCH候选根据PDCCH起始符号索引由小到大的顺序映射PDCCH候选；或者，第一套PDCCH候选根据PDCCH起始符号索引交织的顺序映射PDCCH候选。应当理解的是，在进行映射时，可以将一个PDCCH起始符号索引对应的第一套PDCCH候选中的所有PDCCH候选映射完毕之后，再映射下一个PDCCH起始符号索引对应的第一套PDCCH候选中的所有PDCCH候选。
方式六：第一套PDCCH候选根据PDCCH候选的聚合级别的顺序映射。
具体的，第一套PDCCH候选根据PDCCH候选的聚合级别由高到低的顺序映射PDCCH候选；在进行映射时，可以将一个聚合级别映射对应的第一套PDCCH候选中的所有PDCCH候选映射完毕之后，再映射下一聚合级别对应的第一套PDCCH候选中的所有PDCCH候选。
或者，第一套PDCCH候选根据PDCCH候选的聚合级别由高到低的顺序以及PDCCH监测时刻索引交织的顺序映射PDCCH候选。在进行映射时，可以将一个聚合级别映射对应的第一套PDCCH候选中的所有PDCCH候选映射完毕之后，再映射下一聚合级别对应的第一套PDCCH候选中的所有PDCCH候选；在同一聚合级别的第一套PDCCH候选进行映射时，将一个PDCCH监测时刻索引对应的该聚合级别的第一套PDCCH候选中的所有PDCCH候选映射完毕之后，再映射下一个PDCCH监测时刻索引对应的该聚合级别的第一套PDCCH候选中的所有PDCCH候选。
应当理解的是，事实上第一套PDCCH候选也可以根据PDCCH候选的聚合级别由高到低的顺序以及PDCCH监测时刻索引由大到小的顺序映射PDCCH候选。或者根据PDCCH候选的聚合级别由高到低的顺序以及PDCCH监测时刻索引由小到大的顺序映射PDCCH候选。
在本实施例中，第一套PDCCH候选可以优先于第二套PDCCH候选进行选择。即，在第一套PDCCH候选中映射PDCCH候选之后，才在第二套PDCCH候选中映射PDCCH候选。
在对第二套PDCCH候选进行选择时，第四选择规则包括：第二套PDCCH候选根据下述方式中的至少一种进行选择：
方式七：第二套PDCCH候选全部选择为映射的PDCCH候选。
方式八：第二套PDCCH候选根据PDCCH监测时刻索引的顺序映射PDCCH候选。
具体的，第二套PDCCH候选根据PDCCH监测时刻索引由大到小的顺序映射PDCCH候选；或者，第二套PDCCH候选根据PDCCH监测时刻索引由小到大的顺序映射PDCCH候选；或者，第二套PDCCH候选根据PDCCH监测时刻索引交织的顺序映射PDCCH候选。此时在进行映射时，可以将一个PDCCH监测时刻索引对应的第二套PDCCH候选中的所有PDCCH候选映射完毕之后，再映射下一个PDCCH监测时刻索引对应的第二套PDCCH候选中的所有PDCCH候选。
在第二套PDCCH候选根据PDCCH监测时刻索引交织的顺序映射PDCCH候选时，具体的，可以仅根据PDCCH监测时刻索引交织的顺序映射PDCCH候选。
应当理解的是，在本实施例中PDCCH候选第一映射模块202对于用户特定搜索空间集合中的PDCCH候选进行映射时，是按照各用户特定搜索空间集合在当前时隙内，各载波上的预设映射顺序来进行映射的。
在本实施例中，候选信道映射装置20应当预先知晓终端的对于PDCCH候选监测次数的处理门限值，并知晓终端的对于CCE的处理门限值。
在本实施例中，参见图21所示，候选信道映射装置20还包括第一门限值控制模块203。第一门限值控制模块203用于控制使得映射的总PDCCH候选对应的PDCCH候选监测次数小于等于所述终端的PDCCH候选监测次数的处理门限值，且映射的总PDCCH候选对应的CCE数目小于等于终端的CCE处理门限值。本实施例中所述的映射的总PDCCH候选包含所述用户特定搜索空间集合中映射的PDCCH候选与公共搜索空间集合中映射的PDCCH候选。
应当理解的是，候选信道映射装置20在映射完PDCCH候选后，候选信道映射装置20会在映射的PDCCH候选上选择一个或多个PDCCH候选，作为承载下行控制信息的PDCCH信道，向终端发送下行控制信息。
相对应的，参见图22，本实施例还提供一种候选信道映射装置22，包括：包括：用户特定搜索空间集合第二确定模块221和PDCCH候选第二映射模块222。该候选信道映射装置22可以应用于终端中。
本实施例中，用户特定搜索空间集合第二确定模块221用于确定基站配置 的用户特定搜索空间集合。
在本实施例中，用户特定搜索空间集合包含第一套用户特定搜索空间集合和/或第二套用户特定搜索空间集合。
在本实施例中，第一套用户特定搜索空间集合应当包含有一个或多个第一用户特定搜索空间集合；第二套用户特定搜索空间集合应当包含有一个或多个第二用户特定搜索空间集合。
其中，在确定一个用户特定搜索空间集合为第一用户特定搜索空间集合还是为第二用户特定搜索空间集合时，可以遵循以下两种规则来进行确定：
其一：将在一个时隙内PDCCH监测时刻的数目等于1的用户特定搜索空间集合确定为第一用户特定搜索空间集合；将在一个时隙内PDCCH监测时刻的数目大于1的用户特定搜索空间集合确定为第二用户特定搜索空间集合。
其二：将在一个时隙内PDCCH监测时刻的数目等于1或PDDCH监测周期大于1个时隙的用户特定搜索空间集合确定为第一用户特定搜索空间集合；将在一个时隙内PDCCH监测时刻的数目大于1，且PDDCH监测周期等于1个时隙的用户特定搜索空间集合确定为第二用户特定搜索空间集合。
PDCCH候选第二映射模块222用于使用第一映射规则在第一套用户特定搜索空间集合中映射PDCCH候选；以及使用第二映射规则在第二套用户特定搜索空间集合中映射PDCCH候选。
应当理解的是，本实施例中所述的映射即是指的选择。例如上述“在公共搜索空间集合中映射PDCCH候选”即是指的：在公共搜索空间集合中选择出最终要保留的PDCCH候选。
还需要说明的是，一个用户特定搜索空间集合中的PDCCH候选可以包括一个或一个以上聚合级别的PDCCH候选。
应当理解的是，本实施例中最终映射的PDCCH候选即是最终保留的PDCCH候选。映射的PDCCH候选可以用于承载下行控制信息。
在本实施例中，第一选择规则包括：在从第一套用户特定搜索空间集合中的第一用户特定搜索空间集合中映射PDCCH候选时，将第一用户特定搜索空间集合中的PDCCH候选全部映射，或者将第一用户特定搜索空间集合中的所有PDCCH候选全部不映射。例如以图3中的USS set 2为例，则要么将USS set 2中的两个PDCCH候选全部映射，要么就将USS set 2中的两个PDCCH候选全部放弃，即都不映射。
在本实施例中，第二选择规则包括：在从第二套用户特定搜索空间集合中 的第二用户特定搜索空间集合中映射PDCCH候选时，第二用户特定搜索空间集合中的PDCCH候选根据下述方式中的至少一种进行映射：
方式一：第二用户特定搜索空间集合中的PDCCH候选根据PDCCH监测时刻索引的顺序映射。
具体的，第二用户特定搜索空间集合中的PDCCH候选根据PDCCH监测时刻索引由大到小的顺序映射的PDCCH候选或者，第二用户特定搜索空间集合中的PDCCH候选根据PDCCH监测时刻索引由小到大的顺序选择PDCCH候选映射。或者，第二用户特定搜索空间集合中的PDCCH候选根据PDCCH监测时刻索引交织的顺序选择PDCCH候选映射。
值得注意的是，在根据PDCCH监测时刻索引的顺序进行映射时，可以将一个PDCCH监测时刻索引对应的所有PDCCH候选映射完毕之后，才会映射下一个PDCCH监测时刻索引对应的所有PDCCH候选。
方式二：第二用户特定搜索空间集合中的PDCCH候选根据PDCCH起始符号索引的顺序映射。
应当理解的是，一个PDCCH监测时刻包括1个或多个PDCCH时域符号，不同PDCCH监测时刻的PDCCH起始符号不同，不同PDCCH候选监测时刻之间可以存在重叠的PDCCH时域符号。
在方式二中，其具体的实现方式与方式一类似。具体的，第二用户特定搜索空间集合中的PDCCH候选根据PDCCH起始符号索引由大到小的顺序选择PDCCH候选映射；或者，第二用户特定搜索空间集合中的PDCCH候选根据PDCCH起始符号索引由小到大的顺序选择PDCCH候选映射；或者，第二用户特定搜索空间集合中的PDCCH候选根据PDCCH起始符号索引交织的顺序选择PDCCH候选映射。
值得注意的是，在根据PDCCH起始符号索引的顺序进行映射时，可以将一个PDCCH起始符号索引对应的所有PDCCH候选映射完毕之后，才会映射下一个PDCCH起始符号索引对应的所有PDCCH候选。
方式三：第二用户特定搜索空间集合中的PDCCH候选根据PDCCH候选的聚合级别的顺序映射。
具体的，第二用户特定搜索空间集合中的PDCCH候选根据PDCCH候选的聚合级别由高到低的顺序选择PDCCH候选映射。在进行映射时，可以先将一个聚合级别映射对应的所有PDCCH候选映射完毕之后，再映射下一聚合级别对应的所有PDCCH候选。
在本实施例中，PDCCH候选第二映射模块222还可以同时采用方式一和方 式三从第二套用户特定搜索空间集合中的第二用户特定搜索空间集合中映射PDCCH候选；具体的，可以根据PDCCH候选的聚合级别由高到低的顺序，依次在不同聚合级别中映射PDCCH候选；在进行映射时，将一个聚合级别映射对应的所有PDCCH候选映射完毕之后，再映射下一聚合级别对应的所有PDCCH候选。应当注意的是，在同一聚合级别中，根据所述聚合级别中的所有PDCCH候选对应的PDCCH监测时刻索引，按照PDCCH监测时刻索引由大到小的顺序，或者按照PDCCH监测时刻索引由小到大的顺序，或者按照PDCCH监测时刻索引交织的顺序，映射所述聚合级别中的PDCCH候选；在同一聚合级别的PDCCH候选进行映射时，将一个PDCCH监测时刻索引对应的该聚合级别的所有PDCCH候选映射完毕之后，再映射下一个PDCCH监测时刻索引对应的该聚合级别的所有PDCCH候选。
在本实施例中，PDCCH候选第二映射模块222还可以同时采用方式二和方式三从第二套用户特定搜索空间集合中的第二用户特定搜索空间集合中映射PDCCH候选。与同时采用方式一和方式三从第二套用户特定搜索空间集合中的第二用户特定搜索空间集合中映射PDCCH候选映射类似的，可以根据PDCCH候选的聚合级别由高到低的顺序，依次在不同聚合级别中映射PDCCH候选；在进行映射时，将一个聚合级别映射对应的所有PDCCH候选映射完毕之后，再映射下一聚合级别对应的所有PDCCH候选；而在同一聚合级别中，根据聚合级别中的所有PDCCH候选对应的PDCCH起始符号索引，按照PDCCH起始符号索引由大到小的顺序，或者按照PDCCH起始符号索引由小到大的顺序，或者按照PDCCH起始符号索引交织的顺序，映射所述聚合级别中的PDCCH候选；在同一聚合级别的PDCCH候选进行映射时，将一个PDCCH起始符号索引对应的该聚合级别的所有PDCCH候选映射完毕之后，再映射下一个PDCCH起始符号索引对应的该聚合级别的所有PDCCH候选。
在本实施例中，第二选择规则还可以是：将第二用户特定搜索空间集合中的PDCCH候选划分为第一套PDCCH候选和第二套PDCCH候选，进而使用第三选择规则在第一套PDCCH候选中映射PDCCH候选；使用第四选择规则在第二套PDCCH候选中映射PDCCH候选。
具体的，在本实施例中，PDCCH候选第二映射模块222可以按照以下方式来划分第二用户特定搜索空间集合中的第一套PDCCH候选和第二套PDCCH候选：
对于第一套PDCCH候选可以通过以下方式选取：
1.可以根据PDCCH监测时刻索引顺序从第二用户特定搜索空间集合中的PDCCH候选中选择出第一套PDCCH候选。
具体的，PDCCH候选第二映射模块222可以从所述PDCCH监测时刻索引对应的第二用户特定搜索空间集合中的PDCCH候选中，选择n(n大于等于1)个PDCCH候选构成第一套PDCCH候选。
2.可以根据PDCCH监测时刻索引和PDCCH候选的聚合级别从第二用户特定搜索空间集合中的PDCCH候选中选择出第一套PDCCH候选。
具体的，PDCCH候选第二映射模块222可以从所述PDCCH监测时刻索引对应的第二用户特定搜索空间集合中的PDCCH候选中，选择n(n大于等于1)个聚合级别最高的PDCCH候选构成第一套PDCCH候选。
3.可以根据PDCCH起始符号索引从第二用户特定搜索空间集合中的PDCCH候选中选择出第一套PDCCH候选。
具体的，与上述1类似，PDCCH候选第二映射模块222可以从所述PDCCH起始符号索引对应的第二用户特定搜索空间集合中的PDCCH候选中，选择n(n大于等于1)个PDCCH候选构成第一套PDCCH候选。应当理解的是，此时在各PDCCH起始符号索引对应的PDCCH候选中选取的PDCCH候选所对应的聚合级别没有要求，可以是任意聚合级别的。
4.可以根据PDCCH起始符号索引和PDCCH候选的聚合级别从第二用户特定搜索空间集合中的PDCCH候选中选择出第一套PDCCH候选。
具体的，与上述2类似，PDCCH候选第二映射模块222可以从所述PDCCH起始符号索引对应的第二用户特定搜索空间集合中的PDCCH候选中，选择n(n大于等于1)个聚合级别最高的PDCCH候选构成第一套PDCCH候选。
在本实施的一种具体实施方式中，n可以取1或2。
对于第二套PDCCH候选，PDCCH候选第二映射模块222可以将第二用户特定搜索空间集合中除第一套PDCCH候选之外的其余PDCCH候选作为第二套PDCCH候选。
在本实施例中，第三选择规则包括：第一套PDCCH候选根据下述方式中的至少一种进行选择：
方式四：第一套PDCCH候选根据PDCCH监测时刻索引的顺序映射。
具体的，第一套PDCCH候选可以根据PDCCH监测时刻索引由大到小的顺序映射PDCCH候选。或者，第一套PDCCH候选根据PDCCH监测时刻索引由小到大的顺序映射PDCCH候选。或者，第一套PDCCH候选根据PDCCH监测时刻索引交织的顺序映射PDCCH候选。应当理解的是，在进行映射时，可以将一个PDCCH监测时刻索引对应的第一套PDCCH候选中的所有PDCCH候选映 射完毕之后，再映射下一个PDCCH监测时刻索引对应的第一套PDCCH候选中的所有PDCCH候选。
方式五：第一套PDCCH候选根据PDCCH起始符号索引的顺序映射。
具体的，与方式四类似，第一套PDCCH候选根据PDCCH起始符号索引由大到小的顺序映射PDCCH候选；或者，第一套PDCCH候选根据PDCCH起始符号索引由小到大的顺序映射PDCCH候选；或者，第一套PDCCH候选根据PDCCH起始符号索引交织的顺序映射PDCCH候选。应当理解的是，在进行映射时，可以将一个PDCCH起始符号索引对应的第一套PDCCH候选中的所有PDCCH候选映射完毕之后，再映射下一个PDCCH起始符号索引对应的第一套PDCCH候选中的所有PDCCH候选。
方式六：第一套PDCCH候选根据PDCCH候选的聚合级别的顺序映射；
具体的，第一套PDCCH候选根据PDCCH候选的聚合级别由高到低的顺序映射PDCCH候选；在进行映射时，可以将一个聚合级别映射对应的第一套PDCCH候选中的所有PDCCH候选映射完毕之后，再映射下一聚合级别对应的第一套PDCCH候选中的所有PDCCH候选。
或者，第一套PDCCH候选根据PDCCH候选的聚合级别由高到低的顺序以及PDCCH监测时刻索引交织的顺序映射PDCCH候选。在进行映射时，可以将一个聚合级别映射对应的第一套PDCCH候选中的所有PDCCH候选映射完毕之后，再映射下一聚合级别对应的第一套PDCCH候选中的所有PDCCH候选；在同一聚合级别的第一套PDCCH候选进行映射时，将一个PDCCH监测时刻索引对应的该聚合级别的第一套PDCCH候选中的所有PDCCH候选映射完毕之后，再映射下一个PDCCH监测时刻索引对应的该聚合级别的第一套PDCCH候选中的所有PDCCH候选。
应当理解的是，事实上第一套PDCCH候选也可以根据PDCCH候选的聚合级别由高到低的顺序以及PDCCH监测时刻索引由大到小的顺序映射PDCCH候选。或者根据PDCCH候选的聚合级别由高到低的顺序以及PDCCH监测时刻索引由小到大的顺序映射PDCCH候选。
在本实施例中，第一套PDCCH候选可以优先于第二套PDCCH候选进行选择。即，在第一套PDCCH候选中映射PDCCH候选之后，才在第二套PDCCH候选中映射PDCCH候选。
在对第二套PDCCH候选进行选择时，第四选择规则包括：第二套PDCCH候选根据下述方式中的至少一种进行选择：
方式七：第二套PDCCH候选全部选择为映射的PDCCH候选。
方式八：第二套PDCCH候选根据PDCCH监测时刻索引的顺序映射PDCCH候选。
具体的，第二套PDCCH候选根据PDCCH监测时刻索引由大到小的顺序映射PDCCH候选；或者，第二套PDCCH候选根据PDCCH监测时刻索引由小到大的顺序映射PDCCH候选；或者，第二套PDCCH候选根据PDCCH监测时刻索引交织的顺序映射PDCCH候选。此时在进行映射时，可以将一个PDCCH监测时刻索引对应的第二套PDCCH候选中的所有PDCCH候选映射完毕之后，再映射下一个PDCCH监测时刻索引对应的第二套PDCCH候选中的所有PDCCH候选。
在第二套PDCCH候选根据PDCCH监测时刻索引交织的顺序映射PDCCH候选时，具体的，可以仅根据PDCCH监测时刻索引交织的顺序映射PDCCH候选。
应当理解的是，在本实施例中PDCCH候选第二映射模块222对于用户特定搜索空间集合中的PDCCH候选进行映射时，是按照各用户特定搜索空间集合在当前时隙内，各载波上的预设映射顺序来进行映射的。
在本实施例中，候选信道映射装置22应当预先知晓终端的对于PDCCH候选监测次数的处理门限值，并知晓终端的对于CCE的处理门限值。
在本实施例中，参见图23所示，候选信道映射装置22还包括第二门限值控制模块223。第二门限值控制模块223用于控制使得映射的总PDCCH候选对应的PDCCH候选监测次数小于等于所述终端的PDCCH候选监测次数的处理门限值，且映射的总PDCCH候选对应的CCE数目小于等于终端的CCE处理门限值。本实施例中所述的映射的总PDCCH候选包含所述用户特定搜索空间集合中映射的PDCCH候选与公共搜索空间集合中映射的PDCCH候选。
根据本公开实施例提供的候选信道映射装置，通过为终端配置包含第一套用户特定搜索空间集合和/或第二套用户特定搜索空间集合的用户特定搜索空间集合，再使用第一选择规则在第一套用户特定搜索空间集合中映射PDCCH候选，使用第二选择规则在第二套用户特定搜索空间集合中映射PDCCH候选，从而实现对PDCCH候选进行筛选。在筛选过程中结合终端的PDCCH候选监测次数的处理门限值和CCE处理门限值，从而保证一个时隙上最终保留的PDCCH候选在终端进行处理时，处于UE支持的能力范围之内。
实施例十二：
参见图24，图24为本公开实施例十二提供的一种候选信道映射装置24， 包括：用户特定搜索空间集合第三确定模块241和PDCCH候选第三映射模块242。该候选信道映射装置24可以应用于基站中。
本实施例中，用户特定搜索空间集合第三确定模块241，用于确定终端的第三套用户特定搜索空间集合。本实施例中第三套用户特定搜索空间集合中包含一个或多个第三用户特定搜索空间集合。
PDCCH候选第三映射模块242用于根据载波索引和搜索空间集合索引在第三套用户特定搜索空间集合中映射PDCCH候选。
在本实施例中，第三套用户特定搜索空间集合中包含一个或多个第三用户特定搜索空间集合。第三套用户特定搜索空间集合中的一个或多个第三用户特定搜索空间集合包含了一个时隙上的所有PDCCH候选。
需要说明的是，对于一个时隙而言，其在一个载波上会存在有多个下行带宽部分，其中可能会有一个为初始激活下行带宽部分，剩余的下行用户带宽部分中只会有一个激活，成为激活下行带宽部分。在使用时，终端实质只会在初始激活下行带宽部分和激活下行带宽部分上的用户特定搜索空间集合中监测PDCCH，因此，本实施例中第三套用户特定搜索空间集合可以包括：在一个时隙上激活下行带宽部分和/或初始激活下行带宽部分上的终端的所有用户特定搜索空间集合。
在本实施例中，根据载波索引和搜索空间集合索引在第三套用户特定搜索空间集合中映射PDCCH候选包括：
按照载波索引由低到高的顺序，依次对各载波上第三套用户特定搜索空间集合中的PDCCH候选映射。而在同一载波上，按照搜索空间集合索引由低到高的顺序，依次对各第三用户特定搜索空间集合中的PDCCH候选映射。
在本实施例中，PDCCH候选第三映射模块242根据当前时隙中的载波索引和搜索空间集合索引在所述第三套用户特定搜索空间集合中映射PDCCH候选包括：
PDCCH候选第三映射模块242按照载波索引由低到高的顺序，依次交替地对各载波上第三套用户特定搜索空间集合中的PDCCH候选映射；在同一载波上，PDCCH候选第三映射模块242按照搜索空间集合索引由低到高的顺序，依次对各第三用户特定搜索空间集合中的PDCCH候选映射。
或者，PDCCH候选第三映射模块242按照搜索空间集合索引由低到高的顺序，依次在各搜索空间集合索引对应的第三用户特定搜索空间集合中映射PDCCH候选；对于相同搜索空间集合索引对应的多个第三用户特定搜索空间集合，按照载波索引由低到高的顺序，依次在各第三用户特定搜索空间集合中映 射PDCCH候选。
在本实施例中，PDCCH候选第三映射模块242按照搜索空间集合索引由低到高的顺序，依次在各第三用户特定搜索空间集合中映射PDCCH候选时，可以是：按照搜索空间集合索引由低到高的顺序，对一个搜索空间集合索引对应的第三用户特定搜索空间集合映射完所有需要映射的PDCCH候选后，再对一个搜索空间集合索引对应的第三用户特定搜索空间集合映射PDCCH候选。
在本实施例中，根据载波索引和搜索空间集合索引在第三套用户特定搜索空间集合中映射PDCCH候选包括以下方式中的至少一种：
方式九：直接根据载波索引和搜索空间集合索引在第三套用户特定搜索空间集合中映射PDCCH候选。
方式十：根据载波索引、搜索空间集合索引以及时隙索引在所述第三套用户特定搜索空间集合中映射PDCCH候选。
方式十一：根据载波索引、搜索空间集合索引以及载波类型在第三套用户特定搜索空间集合中映射PDCCH候选。
在本实施例中，参见图25所示，候选信道映射装置24还包括第三门限值控制模块243。第三门限值控制模块243用于控制使得映射的总PDCCH候选对应的PDCCH候选监测次数小于等于所述终端的PDCCH候选监测次数的处理门限值，且映射的总PDCCH候选对应的CCE数目小于等于终端的CCE处理门限值。本实施例中所述的映射的总PDCCH候选包含所述用户特定搜索空间集合中映射的PDCCH候选与公共搜索空间集合中映射的PDCCH候选。
应当理解的是，候选信道映射装置24在选择完映射的PDCCH候选后，基站会在映射的PDCCH候选上选择一个或多个PDCCH候选，作为承载下行控制信息的PDCCH信道，向终端发送下行控制信息。
参见图26，图26为本公开实施例十二提供的一种候选信道映射装置26，包括：用户特定搜索空间集合第四确定模块261和PDCCH候选第四映射模块262。该候选信道映射装置26可以应用于终端中。
本实施例中，用户特定搜索空间集合第四确定模块261，用于确定终端的第三套用户特定搜索空间集合。本实施例中第三套用户特定搜索空间集合中包含一个或多个第三用户特定搜索空间集合。
PDCCH候选第四映射模块262用于根据载波索引和搜索空间集合索引在第三套用户特定搜索空间集合中映射PDCCH候选。
在本实施例中，第三套用户特定搜索空间集合中包含一个或多个第三用户 特定搜索空间集合。第三套用户特定搜索空间集合中的一个或多个第三用户特定搜索空间集合包含了一个时隙上的所有PDCCH候选。
需要说明的是，对于一个时隙而言，其在一个载波上会存在有多个下行带宽部分，其中可能存在一个为初始激活下行带宽部分，剩余的下行用户带宽部分中只会有一个激活，成为激活下行带宽部分。在使用时，终端实质只会初始激活下行带宽部分和激活下行带宽部分上的用户特定搜索空间集合中监测PDCCH，因此，本实施例中第三套用户特定搜索空间集合可以包括：在一个时隙上激活下行带宽部分和/或初始激活下行带宽部分上终端的所有用户特定搜索空间集合。
在本实施例中，根据载波索引和搜索空间集合索引在第三套用户特定搜索空间集合中映射PDCCH候选包括：
按照载波索引由低到高的顺序，依次对各载波上第三套用户特定搜索空间集合中的PDCCH候选映射。而在同一载波上，按照搜索空间集合索引由低到高的顺序，依次对各第三用户特定搜索空间集合中的PDCCH候选映射。
在本实施例中，PDCCH候选第四映射模块262根据当前时隙中的载波索引和搜索空间集合索引在所述第三套用户特定搜索空间集合中映射PDCCH候选包括：
PDCCH候选第四映射模块262按照载波索引由低到高的顺序，依次交替地对各载波上第三套用户特定搜索空间集合中的PDCCH候选映射；在同一载波上，PDCCH候选第四映射模块262按照搜索空间集合索引由低到高的顺序，依次对各第三用户特定搜索空间集合中的PDCCH候选映射。
或者，PDCCH候选第四映射模块262按照搜索空间集合索引由低到高的顺序，依次在各搜索空间集合索引对应的第三用户特定搜索空间集合中映射PDCCH候选；对于相同搜索空间集合索引对应的多个第三用户特定搜索空间集合，按照载波索引由低到高的顺序，依次在各第三用户特定搜索空间集合中映射PDCCH候选。
在本实施例中，PDCCH候选第四映射模块262按照搜索空间集合索引由低到高的顺序，依次在各第三用户特定搜索空间集合中映射PDCCH候选时，可以是：按照搜索空间集合索引由低到高的顺序，对一个搜索空间集合索引对应的第三用户特定搜索空间集合映射完所有需要映射的PDCCH候选后，再对一个搜索空间集合索引对应的第三用户特定搜索空间集合映射PDCCH候选。
在本实施例中，根据载波索引和搜索空间集合索引在第三套用户特定搜索空间集合中映射PDCCH候选包括以下方式中的至少一种：
方式九：直接根据载波索引和搜索空间集合索引在第三套用户特定搜索空间集合中映射PDCCH候选。
方式十：根据载波索引、搜索空间集合索引以及时隙索引在所述第三套用户特定搜索空间集合中映射PDCCH候选。
方式十一：根据载波索引、搜索空间集合索引以及载波类型在第三套用户特定搜索空间集合中映射PDCCH候选。
在本实施例中，参见图27所示，候选信道映射装置26还包括第四门限值控制模块263。第四门限值控制模块263用于控制使得映射的总PDCCH候选对应的PDCCH候选监测次数小于等于所述终端的PDCCH候选监测次数的处理门限值，且映射的总PDCCH候选对应的CCE数目小于等于终端的CCE处理门限值。本实施例中所述的映射的总PDCCH候选包含所述用户特定搜索空间集合中映射的PDCCH候选与公共搜索空间集合中映射的PDCCH候选。
根据本公开实施例提供的候选信道映射装置，通过为终端配置第三套用户特定搜索空间集合，再根据载波索引和搜索空间集合索引在第三套用户特定搜索空间集合中映射PDCCH候选，从而实现对PDCCH候选进行筛选。在筛选过程中结合终端的PDCCH候选处理门限值监测次数的和CCE处理门限值，从而保证一个时隙上最终保留的PDCCH候选和最终保留的需要进行信道估计的CCE数目处于UE支持的能力范围之内。
实施例十三：
参见图28，图28为本公开实施例十三提供的一种候选信道映射装置28，包括：用户特定搜索空间集合第一确定单元281、PDCCH候选第一映射单元282和PDCCH候选第二映射单元283。该候选信道映射装置28可以应用于基站中。
本实施例中，用户特定搜索空间集合第一确定单元281，用于确定终端的用户特定搜索空间集合；所述用户特定搜索空间集合包含第一套用户特定搜索空间集合和/或第二套用户特定搜索空间集合；所述第一套用户特定搜索空间集合包含一个或多个第一用户特定搜索空间集合；所述第二套用户特定搜索空间集合包含一个或多个第二用户特定搜索空间集合。
PDCCH候选第一映射单元282，用于使用第一映射规则在第一套用户特定搜索空间集合中映射PDCCH候选；
PDCCH候选第二映射单元283，用于使用第二映射规则在第二套用户特定搜索空间集合中映射PDCCH候选。
在本实施例中，第一选择规则包括：在从第一套用户特定搜索空间集合中的第一用户特定搜索空间集合中映射PDCCH候选时，将第一用户特定搜索空间集合中的PDCCH候选全部映射，或者将第一用户特定搜索空间集合中的所有PDCCH候选全部不映射。例如以图3中的USS set 2为例，则要么将USS set 2中的两个PDCCH候选全部映射，要么就将USS set 2中的两个PDCCH候选全部放弃，即都不映射。
在本实施例中，第二选择规则包括：在从第二套用户特定搜索空间集合中的第二用户特定搜索空间集合中映射PDCCH候选时，第二用户特定搜索空间集合中的PDCCH候选根据下述方式中的至少一种进行映射：
方式一：第二用户特定搜索空间集合中的PDCCH候选根据PDCCH监测时刻索引的顺序映射。
方式二：第二用户特定搜索空间集合中的PDCCH候选根据PDCCH起始符号索引的顺序映射。
方式三：第二用户特定搜索空间集合中的PDCCH候选根据PDCCH候选的聚合级别的顺序映射。
在本实施例中，第二选择规则还可以是：将第二用户特定搜索空间集合中的PDCCH候选划分为第一套PDCCH候选和第二套PDCCH候选，进而使用第三选择规则在第一套PDCCH候选中映射PDCCH候选；使用第四选择规则在第二套PDCCH候选中映射PDCCH候选。
本实施例中，参见图29所示，PDCCH候选第二映射单元283包括PDCCH候选第一映射子单元2831和PDCCH候选第二映射子单元2832。PDCCH候选第一映射子单元2831用于使用第三选择规则在第一套PDCCH候选中映射PDCCH候选。PDCCH候选第二映射子单元2832用于使用第四选择规则在第二套PDCCH候选中映射PDCCH候选。
在本实施例中，第三选择规则包括：第一套PDCCH候选根据下述方式中的至少一种进行选择：
方式四：第一套PDCCH候选根据PDCCH监测时刻索引的顺序映射。
方式五：第一套PDCCH候选根据PDCCH起始符号索引的顺序映射。
方式六：第一套PDCCH候选根据PDCCH候选的聚合级别的顺序映射。
第四选择规则包括：第二套PDCCH候选根据下述方式中的至少一种进行选择：
方式七：第二套PDCCH候选全部选择为映射的PDCCH候选。
方式八：第二套PDCCH候选根据PDCCH监测时刻索引的顺序映射PDCCH候选。
在本实施例中，参见图30所示，候选信道映射装置28还包括第一门限值控制单元284。第一门限值控制单元284用于控制使得映射的总PDCCH候选对应的PDCCH候选监测次数小于等于所述终端的PDCCH候选监测次数的处理门限值，且映射的总PDCCH候选对应的CCE数目小于等于终端的CCE处理门限值。本实施例中所述的映射的总PDCCH候选包含所述用户特定搜索空间集合中映射的PDCCH候选与公共搜索空间集合中映射的PDCCH候选。
相对应的，参见图31，本实施例还提供一种候选信道映射装置31，包括：用户特定搜索空间集合第二确定单元311、PDCCH候选第三映射单元312和PDCCH候选第四映射单元313。该候选信道映射装置28可以应用于基站中。
本实施例中，用户特定搜索空间集合第二确定单元311，用于确定终端的用户特定搜索空间集合；所述用户特定搜索空间集合包含第一套用户特定搜索空间集合和/或第二套用户特定搜索空间集合；所述第一套用户特定搜索空间集合包含一个或多个第一用户特定搜索空间集合；所述第二套用户特定搜索空间集合包含一个或多个第二用户特定搜索空间集合。
PDCCH候选第二映射单元312，用于使用第一映射规则在第一套用户特定搜索空间集合中映射PDCCH候选。
PDCCH候选第四映射单元313，用于使用第二映射规则在第二套用户特定搜索空间集合中映射PDCCH候选。
在本实施例中，第一选择规则包括：在从第一套用户特定搜索空间集合中的第一用户特定搜索空间集合中映射PDCCH候选时，将第一用户特定搜索空间集合中的PDCCH候选全部映射，或者将第一用户特定搜索空间集合中的所有PDCCH候选全部不映射。
在本实施例中，第二选择规则包括：在从第二套用户特定搜索空间集合中的第二用户特定搜索空间集合中映射PDCCH候选时，第二用户特定搜索空间集合中的PDCCH候选根据下述方式中的至少一种进行映射：
方式一：第二用户特定搜索空间集合中的PDCCH候选根据PDCCH监测时刻索引的顺序映射。
方式二：第二用户特定搜索空间集合中的PDCCH候选根据PDCCH起始符号索引的顺序映射。
方式三：第二用户特定搜索空间集合中的PDCCH候选根据PDCCH候选的聚合级别的顺序映射。
在本实施例中，第二选择规则还可以是：将第二用户特定搜索空间集合中的PDCCH候选划分为第一套PDCCH候选和第二套PDCCH候选，进而使用第三选择规则在第一套PDCCH候选中映射PDCCH候选；使用第四选择规则在第二套PDCCH候选中映射PDCCH候选。
本实施例中，参见图32所示，PDCCH候选第四映射单元313包括PDCCH候选第三映射子单元3131和PDCCH候选第四映射子单元3132。PDCCH候选第三映射子单元3131用于使用第三选择规则在第一套PDCCH候选中映射PDCCH候选。PDCCH候选第四映射子单元3132用于使用第四选择规则在第二套PDCCH候选中映射PDCCH候选。
在本实施例中，第三选择规则包括：第一套PDCCH候选根据下述方式中的至少一种进行选择：
方式四：第一套PDCCH候选根据PDCCH监测时刻索引的顺序映射。
方式五：第一套PDCCH候选根据PDCCH起始符号索引的顺序映射。
方式六：第一套PDCCH候选根据PDCCH候选的聚合级别的顺序映射。
第四选择规则包括：第二套PDCCH候选根据下述方式中的至少一种进行选择：
方式七：第二套PDCCH候选全部选择为映射的PDCCH候选。
方式八：第二套PDCCH候选根据PDCCH监测时刻索引的顺序映射PDCCH候选。
在本实施例中，参见图33所示，候选信道映射装置31还包括第二门限值控制单元314。第二门限值控制单元314用于控制使得映射的总PDCCH候选对应的PDCCH候选监测次数小于等于所述终端的PDCCH候选监测次数的处理门限值，且映射的总PDCCH候选对应的CCE数目小于等于终端的CCE处理门限值。本实施例中所述的映射的总PDCCH候选包含所述用户特定搜索空间集合中映射的PDCCH候选与公共搜索空间集合中映射的PDCCH候选。
根据本公开实施例提供的候选信道映射装置，通过为终端配置包含第一套用户特定搜索空间集合和/或第二套用户特定搜索空间集合的用户特定搜索空间集合，再使用第一选择规则在第一套用户特定搜索空间集合中映射PDCCH候选，使用第二选择规则在第二套用户特定搜索空间集合中映射PDCCH候选，从而实现对PDCCH候选进行筛选。在筛选过程中结合终端的PDCCH候选监测次数的处理门限值和CCE处理门限值，从而保证一个时隙上最终保留的PDCCH候选在终端进行处理时，处于UE支持的能力范围之内。
实施例十四：
本实施例还提供了一种基站，参见图34所示，其包括第一处理器341、第一存储器342以及第一通信总线343。其中：
第一通信总线343用于实现第一处理器341和第一存储器342之间的连接通信；第一处理器341用于执行第一存储器342中存储的一个或者多个第一程序，以实现上述第一实施例至第十实施例任一项所述的第一种候选信道映射方法的步骤；所述第一处理器还用于执行所述第一存储器中存储的一个或者多个第二程序，以实现上述第一实施例至第十实施例任一项所述的第二种候选信道映射方法的步骤。
本实施例还提供了一种终端，参见图35所示，其包括第二处理器351、第二存储器352以及第二通信总线353；所述第二通信总线353用于实现第二处理器351和第二存储器352之间的连接通信；第二处理器351用于执行第二存储器352中存储的一个或者多个第三程序，以实现上述第一实施例至第十实施例任一项所述的第一种候选信道映射方法的步骤。
第二处理器351用于执行第二存储器352中存储的一个或者多个第四程序，以实现上述第一实施例至第十实施例任一项所述的第二种候选信道映射方法的步骤。
同时，本实施例还提供一种存储介质，如软盘、光盘、硬盘、闪存、U盘、CF卡、SD卡、MMC卡等，在该存储介质中存储有计算机可执行指令，该计算机可执行指令可被一个或者多个处理器执行，以实现第一实施例至第十实施例任一项所述的候选信道映射方法的步骤。在此不再赘述。
显然，本领域的技术人员应该明白，上述本公开的各模块或各步骤可以用通用的计算装置来实现，它们可以集中在单个的计算装置上，或者分布在多个计算装置所组成的网络上，可选地，它们可以用计算装置可执行的程序代码来实现，从而，可以将它们存储在计算机存储介质(ROM/RAM、磁碟、光盘)中由计算装置来执行，并且在某些情况下，可以以不同于此处的顺序执行所示出或描述的步骤，或者将它们分别制作成各个集成电路模块，或者将它们中的多个模块或步骤制作成单个集成电路模块来实现。所以，本公开不限制于任何特定的硬件和软件结合。
以上内容是结合具体的实施方式对本公开所作的进一步详细说明，不能认定本公开的具体实施只局限于这些说明。对于本公开所属技术领域的普通技术人员来说，在不脱离本公开构思的前提下，还可以做出若干简单推演或替换，都应当视为属于本公开的保护范围。

Claims (43)

  1. 一种候选信道映射方法，包括：
    确定终端的用户特定搜索空间集合，所述用户特定搜索空间集合包含第一套用户特定搜索空间集合和第二套用户特定搜索空间集合；
    使用第一映射规则在所述第一套用户特定搜索空间集合中映射物理下行控制信道PDCCH候选；
    使用第二映射规则在所述第二套用户特定搜索空间集合中映射PDCCH候选；
    所述第一套用户特定搜索空间集合包含至少一个第一用户特定搜索空间集合；
    所述第二套用户特定搜索空间集合包含至少一个第二用户特定搜索空间集合。
  2. 如权利要求1所述的候选信道映射方法，其中，
    所述第一用户特定搜索空间集合为：在一个时隙内PDCCH监测时刻的数目等于1的用户特定搜索空间集合；
    所述第二用户特定搜索空间集合为：在一个时隙内PDCCH监测时刻的数目大于1的用户特定搜索空间集合。
  3. 如权利要求1所述的候选信道映射方法，其中，
    所述第一用户特定搜索空间集合为：在一个时隙内PDCCH监测时刻的数目等于1或PDDCH监测周期大于1个时隙的用户特定搜索空间集合；
    所述第二用户特定搜索空间集合为：在一个时隙内PDCCH监测时刻的数目大于1，且PDDCH监测周期等于1个时隙的用户特定搜索空间集合。
  4. 如权利要求1所述候选信道映射方法，其中，所述第一映射规则包括：
    所述第一用户特定搜索空间集合中所有的PDCCH候选全部映射，或者所述第一用户特定搜索空间集合中的所有PDCCH候选全部不映射。
  5. 如权利要求1所述的候选信道映射方法，其中，所述第二映射规则包括：
    所述第二用户特定搜索空间集合中的PDCCH候选根据下述方式中的至少一种进行映射：
    方式一：所述第二用户特定搜索空间集合中的PDCCH候选根据PDCCH监测时刻索引的顺序映射；
    方式二：所述第二用户特定搜索空间集合中的PDCCH候选根据PDCCH起 始符号索引的顺序映射；
    方式三：所述第二用户特定搜索空间集合中的PDCCH候选根据所述PDCCH候选的聚合级别的顺序映射。
  6. 如权利要求5所述的候选信道映射方法，其中，所述第二用户特定搜索空间集合中的PDCCH候选根据方式一映射包括：
    所述第二用户特定搜索空间集合中的PDCCH候选根据PDCCH监测时刻索引由大到小的顺序进行映射；或者，所述第二用户特定搜索空间集合中的PDCCH候选根据PDCCH监测时刻索引由小到大的顺序进行映射；或者，所述第二用户特定搜索空间集合中的PDCCH候选根据交织的PDCCH监测时刻索引顺序进行映射；
    所述第二用户特定搜索空间集合中的PDCCH候选根据方式二映射包括：
    所述第二用户特定搜索空间集合中的PDCCH候选根据PDCCH起始符号索引由大到小的顺序进行映射；或者，所述第二用户特定搜索空间集合中的PDCCH候选根据PDCCH起始符号索引由小到大的顺序进行映射；或者，所述第二用户特定搜索空间集合中的PDCCH候选根据交织的PDCCH起始符号索引顺序进行映射；
    所述第二用户特定搜索空间集合中的PDCCH候选根据方式三映射包括：
    所述第二用户特定搜索空间集合中的PDCCH候选根据聚合级别由高到低的顺序进行映射。
  7. 如权利要求5所述的候选信道映射方法，其中，
    所述第二用户特定搜索空间集合中的PDCCH候选根据PDCCH监测时刻索引的顺序映射，包括：将一个PDCCH监测时刻索引对应的所有PDCCH候选映射完毕之后，再映射下一个PDCCH监测时刻索引对应的所有PDCCH候选；
    所述第二用户特定搜索空间集合中的PDCCH候选根据PDCCH起始符号索引的顺序映射，包括：将一个PDCCH起始符号索引对应的所有PDCCH候选映射完毕之后，再映射下一个PDCCH起始符号索引对应的所有PDCCH候选；
    所述第二用户特定搜索空间集合中的PDCCH候选根据所述PDCCH候选的聚合级别的顺序映射，包括：将一个聚合级别映射对应的所有PDCCH候选映射完毕之后，再映射下一聚合级别对应的所有PDCCH候选。
  8. 如权利要求5所述的候选信道映射方法，其中，所述第二用户特定搜索空间集合中的PDCCH候选根据方式一和方式三共同进行映射包括：
    根据所述PDCCH候选的聚合级别由高到低的顺序，依次在不同聚合级别中 映射PDCCH候选；在进行映射时，将一个聚合级别映射对应的所有PDCCH候选映射完毕之后，再映射下一聚合级别对应的所有PDCCH候选；
    在同一聚合级别中，根据所述聚合级别中的PDCCH候选对应的PDCCH监测时刻索引，按照所述PDCCH监测时刻索引由大到小的顺序，或者按照所述PDCCH监测时刻索引由小到大的顺序，或者按照所述PDCCH监测时刻索引交织的顺序，映射所述聚合级别中的PDCCH候选；在同一聚合级别的PDCCH候选进行映射时，将一个PDCCH监测时刻索引对应的该聚合级别的所有PDCCH候选映射完毕之后，再映射下一个PDCCH监测时刻索引对应的该聚合级别的所有PDCCH候选；
    所述第二用户特定搜索空间集合中的PDCCH候选根据方式二和方式三共同进行映射包括：
    根据所述PDCCH候选的聚合级别由高到低的顺序，依次在不同聚合级别中映射PDCCH候选；在进行映射时，将一个聚合级别映射对应的所有PDCCH候选映射完毕之后，再映射下一聚合级别对应的所有PDCCH候选；
    在同一聚合级别中，根据所述聚合级别中的PDCCH候选对应的PDCCH起始符号索引，按照所述PDCCH起始符号索引由大到小的顺序，或者按照所述PDCCH起始符号索引由小到大的顺序，或者按照所述PDCCH起始符号索引交织的顺序，映射所述聚合级别中的PDCCH候选；在同一聚合级别的PDCCH候选进行映射时，将一个PDCCH起始符号索引对应的该聚合级别的所有PDCCH候选映射完毕之后，再映射下一个PDCCH起始符号索引对应的该聚合级别的所有PDCCH候选。
  9. 如权利要求1所述的候选信道映射方法，其中，所述第二映射规则包括：
    将所述第二用户特定搜索空间集合中的PDCCH候选划分为第一套PDCCH候选和第二套PDCCH候选；
    使用第三映射规则在第一套PDCCH候选中映射PDCCH候选；
    使用第四映射规则在第二套PDCCH候选中映射PDCCH候选。
  10. 如权利要求9所述的候选信道映射方法，其中，在所述第一套PDCCH候选中映射PDCCH候选之后，在所述第二套PDCCH候选中映射PDCCH候选。
  11. 如权利要求9所述的候选信道映射方法，其中，将所述第二用户特定搜索空间集合中的PDCCH候选划分为第一套PDCCH候选和第二套PDCCH候选，包括：
    根据多个PDCCH监测时刻索引的顺序从所述第二用户特定搜索空间集合 中的PDCCH候选中选择出第一套PDCCH候选；或者，根据多个PDCCH监测时刻索引和PDCCH候选的聚合级别从所述第二用户特定搜索空间集合中的PDCCH候选中选择出第一套PDCCH候选；或者，根据多个PDCCH起始符号索引从所述第二用户特定搜索空间集合中的PDCCH候选中选择出第一套PDCCH候选；或者，根据多个PDCCH起始符号索引和PDCCH候选的聚合级别从所述第二用户特定搜索空间集合中的PDCCH候选中选择出第一套PDCCH候选；
    将所述第二用户特定搜索空间集合中除所述第一套PDCCH候选之外的其余PDCCH候选作为第二套PDCCH候选。
  12. 如权利要求11所述的候选信道映射方法，其中，
    所述根据多个PDCCH监测时刻索引的顺序从所述第二用户特定搜索空间集合中的PDCCH候选中选择出第一套PDCCH候选包括：从所述多个PDCCH监测时刻索引对应的所述第二用户特定搜索空间集合中的PDCCH候选中，分别选择n个PDCCH候选构成第一套PDCCH候选；所述n大于或等于1；
    所述根据多个PDCCH监测时刻索引和PDCCH候选的聚合级别从所述第二用户特定搜索空间集合中的PDCCH候选中选择出第一套PDCCH候选包括：从所述多个PDCCH监测时刻索引对应的所述第二用户特定搜索空间集合中的PDCCH候选中，分别选择n个聚合级别最高的PDCCH候选构成第一套PDCCH候选；
    所述根据多个PDCCH起始符号索引从所述第二用户特定搜索空间集合中的PDCCH候选中选择出第一套PDCCH候选包括：从所述多个PDCCH起始符号索引对应的所述第二用户特定搜索空间集合中的PDCCH候选中，分别选择n个PDCCH候选构成第一套PDCCH候选；
    所述根据多个PDCCH起始符号索引和PDCCH候选的聚合级别从所述第二用户特定搜索空间集合中的PDCCH候选中选择出第一套PDCCH候选包括：从所述多个PDCCH起始符号索引对应的所述第二用户特定搜索空间集合中的PDCCH候选中，分别选择n个聚合级别最高的PDCCH候选构成第一套PDCCH候选。
  13. 如权利要求9所述的候选信道映射方法，其中，所述第三映射规则包括：
    所述第一套PDCCH候选中的PDCCH候选根据下述方式中的至少一种进行映射：
    方式四：所述第一套PDCCH候选中的PDCCH候选根据PDCCH监测时刻 索引的顺序进行映射；
    方式五：所述第一套PDCCH候选中的PDCCH候选根据PDCCH起始符号索引的顺序进行映射；
    方式六：所述第一套PDCCH候选中的PDCCH候选根据聚合级别的顺序进行映射。
  14. 如权利要求13所述的候选信道映射方法，其中，
    所述第一套PDCCH候选中的PDCCH候选根据方式四进行映射包括：
    根据PDCCH监测时刻索引由大到小的顺序映射；或者，根据PDCCH监测时刻索引由小到大的顺序映射；或者，根据PDCCH监测时刻索引交织的顺序映射；
    所述第一套PDCCH候选中的PDCCH候选根据方式五进行映射包括：
    根据PDCCH起始符号索引由大到小的顺序映射；或者，根据PDCCH起始符号索引由小到大的顺序映射；或者，根据交织的PDCCH起始符号索引顺序映射；
    所述第一套PDCCH候选中的PDCCH候选根据方式六进行映射包括：
    根据聚合级别由高到低的顺序映射；或者，根据聚合级别由高到低的顺序以及交织的PDCCH监测时刻索引顺序映射。
  15. 如权利要求14所述的候选信道映射方法，其中，
    所述第一套PDCCH候选中的PDCCH候选根据PDCCH监测时刻索引的顺序进行映射，还包括：将一个PDCCH监测时刻索引对应的第一套PDCCH候选中的所有PDCCH候选映射完毕之后，再映射下一个PDCCH监测时刻索引对应的第一套PDCCH候选中的所有PDCCH候选；
    所述第一套PDCCH候选中的PDCCH候选根据PDCCH起始符号索引的顺序进行映射，还包括：将一个PDCCH起始符号索引对应的第一套PDCCH候选中的所有PDCCH候选映射完毕之后，再映射下一个PDCCH起始符号索引对应的第一套PDCCH候选中的所有PDCCH候选；
    所述第一套PDCCH候选中的PDCCH候选根据聚合级别的顺序进行映射，还包括：将一个聚合级别映射对应的第一套PDCCH候选中的所有PDCCH候选映射完毕之后，再映射下一聚合级别对应的第一套PDCCH候选中的所有PDCCH候选。
  16. 如权利要求9所述的候选信道映射方法，其中，所述第四映射规则包括：
    所述第二套PDCCH候选根据下述方式中的至少一种进行映射：
    方式七：所述第二套PDCCH候选全部映射；
    方式八：所述第二套PDCCH候选根据PDCCH监测时刻索引的顺序映射。
  17. 如权利要求16所述的候选信道映射方法，其中，
    所述第二套PDCCH候选根据方式八映射PDCCH候选，包括：
    根据PDCCH监测时刻索引由大到小的顺序映射PDCCH候选；或者，根据PDCCH监测时刻索引由小到大的顺序映射PDCCH候选；或者，根据PDCCH监测时刻索引交织的顺序映射PDCCH候选；或者，根据聚合级别由高到低的顺序以及交织的PDCCH监测时刻索引顺序映射PDCCH候选。
  18. 如权利要求17所述的候选信道映射方法，其中，
    所述根据PDCCH监测时刻索引由大到小的顺序映射PDCCH候选；或者，根据PDCCH监测时刻索引由小到大的顺序映射PDCCH候选；或者，根据PDCCH监测时刻索引交织的顺序映射PDCCH候选，在进行映射时，将一个PDCCH监测时刻索引对应的第二套PDCCH候选中的所有PDCCH候选映射完毕之后，再映射下一个PDCCH监测时刻索引对应的第二套PDCCH候选中的所有PDCCH候选；
    所述根据聚合级别由高到低的顺序以及交织的PDCCH监测时刻索引顺序映射PDCCH候选，在进行映射时，将一个聚合级别映射对应的第二套PDCCH候选中的所有PDCCH候选映射完毕之后，再映射下一聚合级别对应的第二套PDCCH候选中的所有PDCCH候选；在同一聚合级别的第二套PDCCH候选进行映射时，将一个PDCCH监测时刻索引对应的该聚合级别的第二套PDCCH候选中的所有PDCCH候选映射完毕之后，再映射下一个PDCCH监测时刻索引对应的该聚合级别的第二套PDCCH候选中的所有PDCCH候选。
  19. 如权利要求1-18任一项所述的候选信道映射方法，其中，
    映射的总PDCCH候选对应的PDCCH候选监测次数小于或等于所述终端的PDCCH候选监测次数的处理门限值；所述映射的总PDCCH候选包含所述用户特定搜索空间集合中映射的PDCCH候选与公共搜索空间集合中映射的PDCCH候选；
    且，
    所述映射的总PDCCH候选对应的控制信道单元CCE数目小于或等于所述终端的CCE处理门限值。
  20. 一种候选信道映射方法，包括：
    确定终端的一套用户特定搜索空间集合，所述一套用户特定搜索空间集合中包含至少一个用户特定搜索空间集合；
    根据载波索引和搜索空间集合索引在所述一套用户特定搜索空间集合中映射PDCCH候选。
  21. 如权利要求20所述的候选信道映射方法，其中，所述一套用户特定搜索空间集合包括：在一个时隙上激活下行带宽部分和初始激活下行带宽部分中的至少之一上的终端的所有用户特定搜索空间集合。
  22. 如权利要求20所述的候选信道映射方法，其中，所述根据载波索引和搜索空间集合索引在所述一套用户特定搜索空间集合中映射PDCCH候选包括：
    按照载波索引由低到高的顺序，依次在多个载波上的所述一套用户特定搜索空间集合中映射PDCCH候选；在同一载波上，按照搜索空间集合索引由低到高的顺序，依次在所述至少一个用户特定搜索空间集合中映射PDCCH候选；
    或者，按照载波索引由低到高的顺序，依次交替地对不同载波上所述一套用户特定搜索空间集合中映射PDCCH候选；在同一载波上，按照搜索空间集合索引由低到高的顺序，依次在所述至少一个用户特定搜索空间集合中映射PDCCH候选；
    或者，按照搜索空间集合索引由低到高的顺序，依次在多个搜索空间集合索引对应的用户特定搜索空间集合中映射PDCCH候选；对于相同搜索空间集合索引对应的多个用户特定搜索空间集合，按照载波索引由低到高的顺序，依次在所述多个用户特定搜索空间集合中映射PDCCH候选。
  23. 如权利要求22所述的候选信道映射方法，其中，所述按照搜索空间集合索引由低到高的顺序，依次在多个搜索空间集合索引对应的用户特定搜索空间集合中映射PDCCH候选，包括：
    按照搜索空间集合索引由低到高的顺序，对一个搜索空间集合索引对应的用户特定搜索空间集合映射完所有需要映射的PDCCH候选后，再对下一个搜索空间集合索引对应的用户特定搜索空间集合映射PDCCH候选。
  24. 如权利要求20所述的候选信道映射方法，其中，所述根据载波索引和搜索空间集合索引在所述一套用户特定搜索空间集合中映射PDCCH候选包括以下方式中的至少一种：
    方式九：根据载波索引和搜索空间集合索引在所述一套用户特定搜索空间集合中映射PDCCH候选；
    方式十：根据载波索引、搜索空间集合索引以及时隙索引在所述一套用户 特定搜索空间集合中映射PDCCH候选。
  25. 如权利要求24所述的候选信道映射方法，其中，采用方式十在所述一套用户特定搜索空间集合中映射PDCCH候选，包括：
    根据所述时隙索引以及所述一套用户特定搜索空间集合中所述至少一个用户特定搜索空间集合在多个载波上的映射先后顺序设置周期，确定所述时隙索引对应的时隙内，多个载波上的所述一套用户特定搜索空间集合中的所述至少一个用户特定搜索空间集合的映射先后顺序设置规则；
    根据所述载波索引和所述映射先后顺序设置规则，依次对多个载波上所述一套用户特定搜索空间集合中的PDCCH候选映射的PDCCH候选；
    在同一载波上，按照搜索空间集合索引由低到高的顺序，依次对多个用户特定搜索空间集合中的PDCCH候选映射的PDCCH候选。
  26. 如权利要求20-25任一项所述的候选信道映射方法，其中，
    映射的总PDCCH候选对应的PDCCH候选监测次数小于或等于所述终端的PDCCH候选监测次数的处理门限值；所述映射的总PDCCH候选包含所述第三套用户特定搜索空间集合中映射的PDCCH候选与公共搜索空间集合中映射的PDCCH候选；
    且，
    所述映射的总PDCCH候选对应的控制信道单元CCE数目小于或等于所述终端的CCE处理门限值。
  27. 一种候选信道映射装置，包括：
    用户特定搜索空间集合确定模块，设置为确定终端的用户特定搜索空间集合；所述用户特定搜索空间集合包含第一套用户特定搜索空间集合和第二套用户特定搜索空间集合；所述第一套用户特定搜索空间集合包含至少一个第一用户特定搜索空间集合；所述第二套用户特定搜索空间集合包含至少一个第二用户特定搜索空间集合；
    PDCCH候选映射模块，设置为使用第一映射规则在所述第一套用户特定搜索空间集合中映射物理下行控制信道PDCCH候选；以及使用第二映射规则在所述第二套用户特定搜索空间集合中映射PDCCH候选。
  28. 如权利要求27所述的候选信道映射装置，其中，
    所述第一用户特定搜索空间集合为：在一个时隙内PDCCH监测时刻的数目等于1的用户特定搜索空间集合；
    所述第二用户特定搜索空间集合为：在一个时隙内PDCCH监测时刻的数目 大于1的用户特定搜索空间集合。
  29. 如权利要求27所述的候选信道映射装置，其中，
    所述第一用户特定搜索空间集合为：在一个时隙内PDCCH监测时刻的数目等于1或PDDCH监测周期大于1个时隙的用户特定搜索空间集合；
    所述第二用户特定搜索空间集合为：在一个时隙内PDCCH监测时刻的数目大于1，且PDDCH监测周期等于1个时隙的用户特定搜索空间集合。
  30. 如权利要求27所述的候选信道映射装置，其中，所述第一映射规则包括：
    将所述第一用户特定搜索空间集合中所有的PDCCH候选全部映射，或者将所述第一用户特定搜索空间集合中的所有PDCCH候选全部不映射。
  31. 如权利要求27所述的候选信道映射装置，其中，所述第二映射规则包括：
    对所述第二用户特定搜索空间集合中的PDCCH候选根据下述方式中的至少一种进行映射：
    方式一：所述第二用户特定搜索空间集合中的PDCCH候选根据PDCCH监测时刻索引的顺序映射；
    方式二：所述第二用户特定搜索空间集合中的PDCCH候选根据PDCCH起始符号索引的顺序映射；
    方式三：所述第二用户特定搜索空间集合中的PDCCH候选根据所述PDCCH候选的聚合级别的顺序映射。
  32. 如权利要求27所述的候选信道映射装置，其中，所述第二映射规则包括：
    所述第二用户特定搜索空间集合中的PDCCH候选包含第一套PDCCH候选和第二套PDCCH候选；
    所述PDCCH候选映射模块设置为通过如下方式使用第二映射规则在所述第二套用户特定搜索空间集合中映射PDCCH候选：使用第三映射规则在第一套PDCCH候选中映射PDCCH候选；使用第四映射规则在第二套PDCCH候选中映射PDCCH候选。
  33. 如权利要求32所述的候选信道映射装置，其中，所述第三映射规则包括：
    对所述第一套PDCCH候选中的PDCCH候选根据下述方式中的至少一种进 行映射：
    方式四：所述第一套PDCCH候选中的PDCCH候选根据PDCCH监测时刻索引的顺序进行映射；
    方式五：所述第一套PDCCH候选中的PDCCH候选根据PDCCH起始符号索引的顺序进行映射；
    方式六：所述第一套PDCCH候选中的PDCCH候选根据聚合级别的顺序进行映射。
  34. 如权利要求32所述的候选信道映射装置，其中，所述第四映射规则包括：
    对所述第二套PDCCH候选根据下述方式中的至少一种进行映射：
    方式七：所述第二套PDCCH候选全部映射；
    方式八：所述第二套PDCCH候选根据PDCCH监测时刻索引的顺序映射。
  35. 如权利要求27-34任一项所述的候选信道映射装置，还包括门限值控制模块；
    所述门限值控制模块设置为控制使得映射的总PDCCH候选对应的PDCCH候选监测次数小于或等于所述终端的PDCCH候选监测次数的处理门限值，且所述映射的总PDCCH候选对应的控制信道单元CCE数目小于或等于所述终端的CCE处理门限值；所述映射的总PDCCH候选包含所述用户特定搜索空间集合中映射的PDCCH候选与公共搜索空间集合中映射的PDCCH候选。
  36. 一种候选信道映射装置，包括：
    用户特定搜索空间集合确定模块，设置为确定终端的一套用户特定搜索空间集合，所述一套用户特定搜索空间集合中包含至少一个用户特定搜索空间集合；
    PDCCH候选映射模块，设置为根据载波索引和搜索空间集合索引在所述一套用户特定搜索空间集合中映射PDCCH候选。
  37. 如权利要求36所述的候选信道映射装置，其中，所述一套用户特定搜索空间集合包括：在一个时隙上激活下行带宽部分和初始激活下行带宽部分中的至少之一上的终端的所有用户特定搜索空间集合。
  38. 如权利要求36所述的候选信道映射装置，其中，所述PDCCH候选映射模块是设置为通过以下方式中的至少一种在所述一套用户特定搜索空间集合中映射PDCCH候选：
    方式九：根据载波索引和搜索空间集合索引在所述一套用户特定搜索空间集合中映射PDCCH候选；
    方式十：根据载波索引、搜索空间集合索引以及时隙索引在所述一套用户特定搜索空间集合中映射PDCCH候选。
  39. 如权利要求36-38任一项所述的候选信道映射装置，还包括门限值控制模块；
    所述门限值控制模块设置为控制使得映射的总PDCCH候选对应的PDCCH候选监测次数小于或等于所述终端的PDCCH候选监测次数的处理门限值，且所述映射的总PDCCH候选对应的控制信道单元CCE数目小于或等于所述终端的CCE处理门限值；所述映射的总PDCCH候选包含所述用户特定搜索空间集合中映射的PDCCH候选与公共搜索空间集合中映射的PDCCH候选。
  40. 一种候选信道映射装置，包括：
    用户特定搜索空间集合第一确定单元，设置为确定终端的用户特定搜索空间集合；所述用户特定搜索空间集合包含第一套用户特定搜索空间集合和第二套用户特定搜索空间集合；所述第一套用户特定搜索空间集合包含至少一个第一用户特定搜索空间集合；所述第二套用户特定搜索空间集合包含至少一个第二用户特定搜索空间集合；
    PDCCH候选第一映射单元，设置为使用第一映射规则在所述第一套用户特定搜索空间集合中映射PDCCH候选；
    PDCCH候选第二映射单元，设置为使用第二映射规则在所述第二套用户特定搜索空间集合中映射PDCCH候选。
  41. 一种基站，包括：处理器、存储器以及一通信总线；
    所述通信总线设置为实现所述处理器和所述存储器之间的连接通信；
    所述处理器设置为执行所述存储器中存储的至少一个第一程序，以实现如权利要求1-19任一项所述的候选信道映射方法；
    所述处理器还设置为执行所述存储器中存储的至少一个第二程序，以实现如权利要求20-26任一项所述的候选信道映射方法。
  42. 一种终端，包括：处理器、存储器以及通信总线；
    所述通信总线设置为实现所述处理器和所述存储器之间的连接通信；
    所述处理器设置为执行所述存储器中存储的至少一个第一程序，以实现如权利要求1-19任一项所述的候选信道映射方法；
    所述处理器设置为执行所述存储器中存储的至少一个第二程序，以实现如权利要求20-26任一项所述的候选信道映射方法。
  43. 一种存储介质，存储有计算机可执行指令，所述计算机可执行指令用于执行如权利要求1-19任一项所述的候选信道映射方法，或用于执行以实现如权利要求20-26任一项所述的候选信道映射方法。
PCT/CN2019/086439 2018-05-11 2019-05-10 候选信道映射方法、装置、基站、终端及存储介质 WO2019214722A1 (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201810451265.1A CN110474743A (zh) 2018-05-11 2018-05-11 候选信道映射方法、装置、基站、终端及存储介质
CN201810451265.1 2018-05-11

Publications (1)

Publication Number Publication Date
WO2019214722A1 true WO2019214722A1 (zh) 2019-11-14

Family

ID=68467259

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2019/086439 WO2019214722A1 (zh) 2018-05-11 2019-05-10 候选信道映射方法、装置、基站、终端及存储介质

Country Status (2)

Country Link
CN (1) CN110474743A (zh)
WO (1) WO2019214722A1 (zh)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115150022B (zh) * 2021-03-31 2024-04-16 维沃移动通信有限公司 控制信道分配方法、装置及通信设备

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101860896A (zh) * 2010-06-13 2010-10-13 中兴通讯股份有限公司 一种确定用户专有搜索空间的方法和装置
WO2011116183A1 (en) * 2010-03-18 2011-09-22 Qualcomm Incorporated User-specific search space design for multi-carrier operation
CN102291736A (zh) * 2011-08-08 2011-12-21 中兴通讯股份有限公司 下行控制信道的检测方法、用户设备及基站
CN102783064A (zh) * 2010-03-11 2012-11-14 Lg电子株式会社 控制信道分配方法和装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102783064A (zh) * 2010-03-11 2012-11-14 Lg电子株式会社 控制信道分配方法和装置
WO2011116183A1 (en) * 2010-03-18 2011-09-22 Qualcomm Incorporated User-specific search space design for multi-carrier operation
CN101860896A (zh) * 2010-06-13 2010-10-13 中兴通讯股份有限公司 一种确定用户专有搜索空间的方法和装置
CN102291736A (zh) * 2011-08-08 2011-12-21 中兴通讯股份有限公司 下行控制信道的检测方法、用户设备及基站

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
ZTE: "Remaining Issues on Search Space", 3GPP TSG RAN WGI MEETING #93 RL-1806128, 25 May 2018 (2018-05-25), XP051441338 *

Also Published As

Publication number Publication date
CN110474743A (zh) 2019-11-19

Similar Documents

Publication Publication Date Title
RU2496276C2 (ru) Способ и система для распределения ресурсов, способ слепого обнаружения, базовая станция, абонентское оборудование
CN110351002B (zh) 候选pdcch的优先级确定及监听方法、装置、存储介质、基站、终端
JP6313321B2 (ja) 共通サーチスペース及びｕｅ固有サーチスペースをブラインド検出するための方法及び装置
US12095706B2 (en) Information determination method and device, information adjustment method, threshold usage method, terminal, and storage medium
JP2021536179A (ja) 情報決定方法およびデバイスならびに記憶媒体
JP7216740B2 (ja) チャネルブラインド検出方法、信号伝送方法及び関連機器
RU2602808C1 (ru) Способ обнаружения канала управления и пользовательское устройство
JP6372769B2 (ja) 通信装置、通信方法及び集積回路
US20120236813A1 (en) Method and device for allocating control channel element
CN102065485B (zh) 分配控制信道单元资源的方法及装置
JP2010114780A (ja) 無線基地局
US9883497B2 (en) Control signaling transmission and detection methods, base station, and terminal
CN111148259A (zh) 一种通信方法及装置
WO2019137143A1 (zh) 调度处理方法及装置、存储介质、电子设备
WO2016197472A1 (zh) 一种增强型物理下行控制信道处理方法、装置及存储介质
WO2019214722A1 (zh) 候选信道映射方法、装置、基站、终端及存储介质
CN113016220B (zh) 数字无线通信的方法、系统和设备
WO2020224512A1 (zh) 下行控制信道的检测方法和装置
CN107623948B (zh) 一种pdcch聚合等级下cce候选位置选择方法和装置
CN102378263B (zh) 一种平衡物理下行控制信道分布的方法和系统
CN108809588B (zh) 一种控制信道资源映射方法和装置
US9451603B2 (en) Information transmission method, information transmission apparatus, and base station
WO2019192304A1 (zh) 信道盲检方法、信号传输方法和相关设备
WO2022082709A1 (zh) 物理下行控制信道的盲检测方法和通信装置
CN108400856B (zh) 控制信息的接收、发送方法及装置

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 19800245

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

32PN Ep: public notification in the ep bulletin as address of the adressee cannot be established

Free format text: NOTING OF LOSS OF RIGHTS PURSUANT TO RULE 112(1) EPC (EPO FORM 1205A DATED 16.04.2021)

122 Ep: pct application non-entry in european phase

Ref document number: 19800245

Country of ref document: EP

Kind code of ref document: A1