WO2023010665A1

WO2023010665A1 - Search space determination method and apparatus, devices, and storage medium

Info

Publication number: WO2023010665A1
Application number: PCT/CN2021/119915
Authority: WO
Inventors: 方昀; 陈文洪; 史志华; 黄莹沛
Original assignee: Oppo广东移动通信有限公司
Priority date: 2021-08-06
Filing date: 2021-09-23
Publication date: 2023-02-09
Also published as: CN117256113A; WO2023010570A1

Abstract

The present application discloses a search space determination method and apparatus, devices, and a storage medium, which relate to the technical field of communications. The method comprises: determining, on the basis of a BD count value and the blind detection capability of a terminal, a target search space in a search space set, wherein the BD count value is used when a terminal device performs PDCCH repeated transmission, the BD count value is an integer greater than or equal to 2, the search space set contains an associated search space, and the associated search space is used for PDCCH repeated transmission. According to embodiments of the present application, when the BD count is greater than or equal to 2, the terminal device and a network device may specify the means by which the BD count value is applied to the associated search space, and determine a unified target search space from the search space set, such that the network device performs terminal scheduling in the target search space, and the terminal device performs PDCCH blind detection in the target search space, ensuring the success rate of blind detection of the terminal device.

Description

Method, device, equipment and storage medium for determining search space

This application claims the priority of the PCT application with the application number PCT/CN2021/111319 and the title of the invention "Method, device, device and storage medium for determining search space" filed on August 6, 2021, the entire contents of which are incorporated by reference incorporated in this application.

technical field

The embodiments of the present application relate to the field of communication technologies, and in particular, to a method, device, device, and storage medium for determining a search space.

Background technique

The search space (Search Space) is a set of candidate Physical Downlink Control Channels (Physical Downlink Control CHannel, PDCCH) under a specific aggregation level (Aggregation Level, AL).

During the PDCCH blind detection process, the terminal device determines several search spaces that meet its own blind detection capability from a group of search spaces configured by the network device, so as to perform blind detection on candidate PDCCHs in the search spaces. Correspondingly, in order to ensure successful blind detection of the terminal device, the network device needs to carry the scheduling information on the candidate PDCCH in the search space within the range of the blind detection capability of the terminal based on the blind detection capability of the terminal.

Contents of the invention

Embodiments of the present application provide a method, device, device, and storage medium for determining a search space. Described technical scheme is as follows:

On the one hand, an embodiment of the present application provides a method for determining a search space, the method including:

Determine the target search space in the search space set based on the value of blind detection times (Blind Decode count, BD count) and terminal blind detection capability, the BD count value is used when the terminal device performs PDCCH repeated transmission, and the BD count value is greater than or equal to is an integer of 2, the set of search spaces includes an associated search space, and the associated search space is used for repeated transmission of the PDCCH.

On the other hand, an embodiment of the present application provides an apparatus for determining a search space, and the apparatus includes:

A determining module, configured to determine a target search space in a search space set based on a BD count value and a terminal blind detection capability, the BD count value is used when the terminal device performs PDCCH repeated transmission, and the BD count value is an integer greater than or equal to 2, The set of search spaces includes an associated search space, and the associated search space is used for PDCCH repeated transmission.

On the other hand, an embodiment of the present application provides a terminal device, where the terminal device includes a processor and a transceiver;

The processor is configured to determine the target search space in the search space set based on the BD count value and terminal blind detection capability, the BD count value is used when the terminal device performs PDCCH repeated transmission, and the BD count value is greater than or equal to 2 Integer, the set of search spaces includes an associated search space, and the associated search space is used for repeated transmission of the PDCCH.

On the other hand, an embodiment of the present application provides a network device, where the network device includes a processor and a transceiver;

On the other hand, an embodiment of the present application provides a computer-readable storage medium, where a computer program is stored in the storage medium, and the computer program is used for execution by a processor, so as to implement the above method for determining a search space.

According to an aspect of an embodiment of the present application, a chip is provided, the chip includes a programmable logic circuit and/or program instructions, and when the chip is running, is used to implement the above method for determining a search space.

According to an aspect of the embodiments of the present application, a computer program product or computer program is provided, the computer program product or computer program includes computer instructions, the computer instructions are stored in a computer-readable storage medium, and a processor reads from the The computer-readable storage medium reads and executes the computer instructions, so as to realize the above method for determining the search space.

In the technical solution provided by the embodiment of the present application, since the configured search space set can exceed the upper limit of the blind detection capability of the terminal device, and when the search space set includes the associated search space for PDCCH repeated transmission, the PDCCH repeated transmission is used The BD count value can be greater than or equal to 2, so terminal devices and network devices need to specify how the BD count value is applied to the associated search space, and based on the BD count value, determine the target search space that meets the blind detection capability of the terminal from the search space set, so that the network The device performs terminal scheduling in the target search space, and the terminal device performs PDCCH blind detection in the target search space to ensure the blind detection success rate of the terminal device.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. For those skilled in the art, other drawings can also be obtained based on these drawings without creative effort.

Fig. 1 shows a block diagram of a communication system provided by an exemplary embodiment of the present application;

FIG. 2 shows a flowchart of a method for determining a search space shown in an exemplary embodiment of the present application;

FIG. 3 shows a flowchart of a method for determining a search space shown in another exemplary embodiment of the present application;

Fig. 4 is an implementation schematic diagram of a target search space determination process shown in an exemplary embodiment of the present application;

Fig. 5 is an implementation schematic diagram of a target search space determination process shown in an exemplary embodiment of the present application;

FIG. 6 is a flow chart of a target search space determination process output by an exemplary embodiment of the present application;

FIG. 7 shows a flowchart of a method for determining a search space shown in another exemplary embodiment of the present application;

Fig. 8 is an implementation schematic diagram of a target search space determination process shown in an exemplary embodiment of the present application;

Fig. 9 is an implementation schematic diagram of a target search space determination process shown in an exemplary embodiment of the present application;

FIG. 10 is a flow chart of a target search space determination process output by an exemplary embodiment of the present application;

Fig. 11 shows a block diagram of an apparatus for determining a search space provided by an embodiment of the present application;

Fig. 12 shows a schematic structural diagram of a communication device provided by an embodiment of the present application.

Detailed ways

In order to make the purpose, technical solution and advantages of the present application clearer, the implementation manners of the present application will be further described in detail below in conjunction with the accompanying drawings.

The network architecture and business scenarios described in the embodiments of the present application are for more clearly illustrating the technical solutions of the embodiments of the present application, and do not constitute limitations on the technical solutions provided by the embodiments of the present application. The evolution of the technology and the emergence of new business scenarios, the technical solutions provided in the embodiments of this application are also applicable to similar technical problems.

Please refer to FIG. 1 , which shows a block diagram of a communication system provided by an exemplary embodiment of the present application. The communication system may include: a terminal device 10 and an access network device 20 .

The terminal equipment 10 may refer to a user equipment (User Equipment, UE), an access terminal, a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a wireless communication device, a user agent or a user device. Optionally, the terminal device 10 may also be a cellular phone, a cordless phone, a Session Initiation Protocol (Session Initiation Protocol, SIP) phone, a Wireless Local Loop (Wireless Local Loop, WLL) station, a Personal Digital Assistant (PDA) ), handheld devices with wireless communication functions, computing devices or other processing devices connected to wireless modems, vehicle-mounted devices, wearable devices, terminal devices in the fifth generation mobile communication system (5th Generation System, 5GS) or future evolution The terminal equipment in the Public Land Mobile Network (Public Land Mobile Network, PLMN), etc., is not limited in this embodiment of the present application. For convenience of description, the devices mentioned above are collectively referred to as terminal devices. The number of terminal devices 10 is generally multiple, and one or more terminal devices 10 may be distributed in a cell managed by each access network device 20 .

A network device is a device deployed in an access network to provide a wireless communication function for the terminal device 10 . Network equipment may include various forms of macro base stations, micro base stations, relay stations, access points and so on. In systems using different radio access technologies, the names of devices with network device functions may be different. For example, in 5G NR systems, they are called gNodeB or gNB. The term "network equipment" may change as communications technology evolves. For the convenience of description, in the embodiment of the present application, the above-mentioned devices that provide the wireless communication function for the terminal device 10 are collectively referred to as network devices. Optionally, a communication relationship can be established between the terminal device 10 and the core network device through network devices. Exemplarily, in a Long Term Evolution (Long Term Evolution, LTE) system, the network device may be one or more of Evolved-Universal Terrestrial Radio Access Network (Evolved-Universal Terrestrial Radio Access Network, E-UTRAN) or E-UTRAN An eNodeB; in the 5G New Radio (New Radio, NR) system, the network device can be one or more gNBs in the Radio Access Network (RAN) or RAN.

In an example, a network device may be deployed with multiple transmission reception points (Transmission Reception Point, TRP), so as to implement PDCCH enhancement based on multiple transmission reception points (Multi Transmission Reception Point, MTRP). Exemplarily, as shown in FIG. 1 , network devices correspond to TRP1 , TRP2 and TRP3 (TRP is marked as 20 in FIG. 1 ). Wherein, TRP1 and TRP2 correspond to the first cell, and TRP3 corresponds to the second cell.

The technical solutions described in the embodiments of this application can be applied to the 5G NR system, and can also be applied to the subsequent evolution system of the 5G NR system, which is not limited in this application.

For the convenience of understanding, the nouns involved in the embodiments of the present application are described below.

Search Space Set (Search Space Set): A set of search spaces (including at least two search spaces) configured by the network side, and the search space is a collection of candidate PDCCH (PDCCH candidates) at a specific aggregation level (Aggregation Level, AL) . During the blind detection process, the terminal device will decode the candidate PDCCH in the search space, and when the verification is passed, determine that the decoded candidate PDCCH is valid, and then use the information obtained from the decoding (such as transmission scheduling indication, timing, etc.) slot interval indication, power control command, etc.) for subsequent operations.

Associated search space: In R17, MTRP-based PDCCH enhancement is introduced, and PDCCH repeated transmission (repetition) is performed by associating two search spaces. The number of candidate PDCCHs at each aggregation level in the associated search space is equal, and the candidate PDCCHs corresponding to the same index (index) in the associated search space are associated. For example, the associated search space includes search space SS1 and search space SS2, and both SS1 and SS2 contain five candidate PDCCHs, and the first candidate PDCCH in SS1 is associated with the first candidate PDCCH in SS2, and the first candidate PDCCH in SS1 The two PDCCH candidates are associated with the second PDCCH candidate in SS2, and so on.

In addition, the associated search spaces correspond to different control resource sets (COntrol REsource Set, CORESET), and under the same aggregation level, the candidate PDCCHs with the same index in the associated search space are used to transmit the same downlink control information (Downlink Control Information, DCI), This DCI is used to invoke the same physical channel.

BD count value: used to indicate the number of blind detection times of the candidate PDCCH. In R15, the terminal device judges each search space one by one based on the size of the search space identifier, and the BD count value of each candidate PDCCH in the search space is 1; while in R17, due to the introduction of repeated transmission of PDCCH, for users For the associated search space of PDCCH repeated transmission, when the terminal device performs PDCCH blind detection, it can separately detect two associated candidate PDCCHs in the associated search space, or perform soft combination on the two associated candidate PDCCHs. Therefore, The BD count value of the candidate PDCCH can be greater than or equal to 2.

In LTE, the aggregation level of the search space and the number of candidate PDCCHs in each aggregation level are predefined or obtained implicitly according to the size of the control channel resource. Although LTE supports reducing the number of candidate PDCCHs for blind detection by a certain proportion, the flexibility remains restricted. In NR, the DCI format, aggregation level, the number of candidate PDCCHs corresponding to the aggregation level, and the detection period of the search space in the time domain can be configured through high-level signaling. Based on this configuration information, the complexity of blind detection can be flexibly controlled. . Moreover, in order to reduce the restriction on the network side scheduler, the candidate PDCCH configured on the network side in NR may exceed the upper limit of the blind detection capability of the terminal device. At this time, the terminal device needs to determine the actual detection from the configured candidate PDCCH according to a predefined mechanism. candidate PDCCHs (that is, a subset is determined from the configured candidate PDCCHs).

Due to the introduction of PDCCH repeated transmission in R17, how to map the BD count value (greater than or equal to 2) to the associated search space based on existing specifications, so as to determine the actual detected candidate PDCCH from the candidate PDCCH configured on the network side has become an important research topic.

Please refer to FIG. 2 , which shows a flow chart of a method for determining a search space shown in an exemplary embodiment of the present application. This method is applied to a communication device (terminal device 10 or network device 20 shown in FIG. 1 ) in this embodiment. ) as an example for illustration.

Step 210, determine the target search space in the search space set based on the BD count value and the blind detection capability of the terminal, the BD count value is used when the terminal device performs PDCCH repeated transmission, the BD count value is an integer greater than or equal to 2, and the search space set includes an associated search space, and the associated search space is used for PDCCH repeated transmission.

In some embodiments, the search space set is all search spaces configured by the network side (there may be search spaces for sending PDCCH in different time units), or the search space set is all search spaces configured by the network side, in A set of search spaces for sending the PDCCH in the same time unit. Wherein, the time unit may be a slot or a span, and the time unit may also be called a time unit.

In the embodiment of the present application, the set of search spaces includes an associated search space, and the associated search space is used to implement repeated transmission of the PDCCH. Wherein, the two search spaces in the associated search space correspond to different CORESETs respectively, and under the same set level, the candidate PDCCHs with the same index in the associated search space are used to transmit the same DCI, and the DCI is used to call the same physical channel. In a possible implementation manner, the associated search space is configured through high-layer signaling or physical layer signaling.

In an exemplary example, the associated search space includes a search space SS2 and a search space SS3, and both SS2 and SS3 include 5 PDCCHs. Under the same aggregation level, the candidate PDCCH with index 1 in SS2 and the candidate PDCCH with index 1 in SS3 are used to transmit DCI 1, and the candidate PDCCH with index 2 in SS2 is used for the candidate PDCCH with index 2 in SS3. to transmit DCI 2, and so on.

Certainly, the search space set may include other search spaces besides the associated search space, and the embodiment of the present application does not limit the number of search spaces in the search space set.

When there is an associated search space, the number of blind detections of candidate PDCCHs in the associated search space may be greater than one, and correspondingly, the BD count value used by the terminal device for repeated PDCCH transmission may be greater than or equal to 2. In a possible implementation manner, when performing blind detection on the candidate PDCCHs in the associated search space, the terminal device can not only perform blind detection on the candidate PDCCHs in the two search spaces, but also perform blind detection on the candidate PDCCHs in the two search spaces. The BD count value adopted by the terminal equipment will no longer be 1 in this case.

Since the candidate PDCCH contained in the search space set can exceed the upper limit of the blind detection capability of the terminal device, the terminal device needs to combine its own blind detection capability to filter out part of the search space from the search space set. In this scenario, the terminal device needs to determine the way the BD count value is mapped to the associated search space, and determine the target search space that meets the blind detection capability of the terminal itself from the search space set (the target search space is a subset of the search space set).

Network devices also need to clarify how the BD count value is mapped to the associated search space, so that based on the blind detection capability of the terminal, the target search space that meets the blind detection capability of the terminal can be selected from the search space, and then the PDCCH is sent on the target search space to avoid The PDCCH is sent in a search space beyond the blind detection capability of the terminal, causing the blind detection of the terminal to fail.

Optionally, the blind detection capability of the terminal includes: an upper limit on the number of PDCCH detections within a time unit, and/or an upper limit on the number of non-overlapping CCEs. The time unit can be slot or span. Correspondingly, the target search space is the search space for sending the PDCCH within the same time unit.

Optionally, the BD count value is used to represent the total number of blind detection times of candidate PDCCHs in each search space in the associated search space, and the BD count value can be 2 or 3, and the embodiment of the present application does not limit the specific value of the BD count value .

In existing specifications, the following criteria are followed when screening search spaces based on terminal blind detection capabilities:

1. The public search space set takes precedence over the UE-specific search space set;

2. In the UE-specific search space set, the search space with a small ID number is prioritized over the search space with a large ID number;

3. If the configured UE-specific search space is included in the UE detection search space and exceeds the blind detection capability of the terminal device, all candidate PDCCHs in this UE-specific search space will not be blind-detected, and the UE whose ID number is greater than this search space The dedicated search space also does not perform blind detection;

4. The blind detection complexity of the public search space set does not exceed the blind detection capability of the terminal device.

In the embodiment of the present application, the communication device also follows the above criteria when determining the target search space.

In some embodiments, the target search space determined by the communication device includes the associated search space at the same time, or does not include the associated search space at the same time, or includes one of the associated search spaces.

In an illustrative example, the set of search spaces includes SS1, SS2, SS3 and SS4, wherein SS2 and SS3 are associated search spaces. The target search space determined by the communication device based on the BD count value and the terminal blind detection capability includes SS1, SS2, and SS3 (including the associated search space), or, the target search space includes SS1 (and does not include the associated search space), or, the target The search spaces include SS1 and SS2 (only one of the associated search spaces is included).

In summary, in the technical solution provided by the embodiment of the present application, since the configured search space set can exceed the upper limit of the blind detection capability of the terminal device, and when the search space set includes the associated search space for PDCCH repeated transmission, the PDCCH The BD count value used for repeated transmissions can be greater than or equal to 2. Therefore, terminal devices and network devices need to clarify how the BD count value is applied to the associated search space, and determine the target that meets the blind detection capability of the terminal from the search space based on the BD count value. Search space, so that the network device can perform terminal scheduling in the target search space, and the terminal device can perform PDCCH blind detection in the target search space, so as to ensure the blind detection success rate of the terminal device.

In some embodiments, when the communication device is a network device, after the target search space is determined, the network device performs terminal scheduling on candidate PDCCHs in the target search space to avoid terminal scheduling on candidate PDCCHs in other search spaces in the search space set. During scheduling, because other search spaces exceed the blind detection capability range of the terminal, the blind detection fails, which in turn leads to the problem of scheduling failure.

In some embodiments, when the communication device is a terminal device, after determining the target search space, the terminal device performs blind detection on candidate PDCCHs in the target search space, so that when the blind detection is successful, based on the decoded information in the PDCCH Follow up. Since the network device and the terminal device determine the target search space based on the same BD count value and terminal blind detection capability, the blind detection success rate of the terminal device can be guaranteed.

In a possible implementation manner, when the target search space contains associated search spaces at the same time, the terminal device performs blind detection on the associated search spaces based on the BD count value; when the target search space contains only one search space in the associated search spaces When , the terminal device conducts blind detection on the search space with the BD count value being 1.

In order to ensure that the terminal device and the network device determine the target search space based on the same BD count value, in a possible implementation manner, the BD count value is determined by the terminal device itself, and reported to the network device when the PDCCH is repeatedly transmitted (can be obtained from multiple Select and report from the candidate values configured), so that the network device can control PDCCH delivery based on the BD count value, and ensure the consistency of the determined target search space.

In another possible implementation manner, the terminal device reports multiple candidate BD count values to the network device, and the network device selects and configures the BD count value from the multiple candidate BD count values. For example, the candidate BD count values reported by the terminal device to the network device are 2 and 3, and the network device selects and configures the BD count value as 3.

In other possible implementation manners, the BD count value is a default value, which is adopted by both the terminal device and the network device, and the terminal device does not need to report, for example, the BD count value is 2 by default.

In a possible implementation manner, when the communication device determines the target search space in the search space set based on the BD count value and its own blind detection capability, it can regard the two search spaces in the associated search space as independent search spaces, and determine each The blind detection complexity of the search space, correspondingly, the determined target search space may only include one search space in the associated search space.

In another possible implementation manner, the communication device may regard the two search spaces in the associated search space as a whole, and determine the overall blind detection complexity of the associated search space. Correspondingly, in the determined target search space, either Both contain the associated search space, or both do not contain the associated search space. The above two manners of determining the target search space are described below using exemplary embodiments respectively.

Please refer to FIG. 3, which shows a flow chart of a method for determining a search space shown in another exemplary embodiment of the present application. This embodiment applies this method to a communication device (the terminal device 10 or network device shown in FIG. 1 20) as an example for illustration.

Step 310, determine that the first BD count value corresponding to the i-th search space is m, the second BD count value corresponding to the j-th search space is n-m, and m is a positive integer smaller than n.

The associated search space is the i-th search space and the j-th search space in the search space set. Optionally, the search space identifier of the i-th search space is continuous with the search space identifier of the j-th search space, that is, the difference between i and j is 1; Alternatively, the search space identifier of the i-th search space is not continuous with the search space identifier of the j-th search space, that is, the difference between i and j is greater than or equal to 2.

For example, the search spaces in the search space set include SS1, SS2, SS3, and SS4, where the associated search spaces may be SS2 and SS3, or the associated search spaces may be SS2 and SS4.

In a possible implementation manner, when determining the target search space from the set of search spaces, the communication device needs to map the BD count value to the associated search space, that is, assign the BD count value to the i-th search space and the j-th search space, where , the sum of the BD count values assigned to the i-th search space and the j-th search space is the BD count value used for PDCCH repeated transmission, and the BD count values assigned to each search space are greater than or equal to 1.

In a possible situation, when the BD count value is 2, the value of the first BD count assigned to the i-th search space is 1, and the value of the second BD count assigned to the j-th search space is 1; when BD When the count value is 3, the first BD count value assigned to the i-th search space is 1, and the second BD count value assigned to the j-th search space is 2.

Optionally, the BD count value assigned to the search space is positively correlated with the size of the search space identifier. For example, when the search space identifier of the i-th search space is smaller than the search space identifier of the j-th search space, the first BD count value Less than or equal to the second BD count value.

Schematically, as shown in Figure 4, SS2 and SS3 in the search space set are associated search spaces. When the BD count value is 2, the first BD count value corresponding to SS2 is 1, and the second BD count value corresponding to SS3 is 1. .

As shown in Figure 5, SS2 and SS3 in the search space set are associated search spaces. When the BD count value is 3, the first BD count value corresponding to SS2 is 1, and the second BD count value corresponding to SS3 is 2.

Step 320: Determine the target search space in the search space set based on the first BD count value, the second BD count value and the blind detection capability of the terminal.

Optionally, the blind detection capability of the terminal includes the number of detections of candidate PDCCHs and non-overlapped CCEs (non-overlapped CCEs) within a unit time (slot or span). Since the detection number of candidate PDCCHs in the search space is related to the BD count value of the candidate PDCCH, in a possible implementation, the communication device determines the number of candidate PDCCHs in each search space in the search space set, and the non-overlapping of each search space The number of CCEs, so as to determine the target search space in the search space set based on the number of candidate PDCCHs, the number of non-overlapping CCEs, the first BD count value, the second BD count value, and the blind detection capability of the terminal.

Schematically, as shown in Figures 4 and 5, the search space SS1 in the search space set contains 10 candidate PDCCHs, and the number of non-overlapping CCEs is 12; the search space SS2 contains 5 candidate PDCCHs, and the number of non-overlapping CCEs is 8 ; The search space SS3 includes 5 candidate PDCCHs, and the number of non-overlapping CCEs is 10; the search space SS4 includes 6 candidate PDCCHs, and the number of non-overlapping CCEs is 6.

In a possible implementation manner, the communication device sequentially determines the total number of candidate PDCCHs that need to be detected when performing blind detection on at least one PDCCH in SS1 based on the ascending order of search space identifiers corresponding to each search space in the search space set, and Total number of overlapping CCEs.

As shown in Figures 4 and 5, the communication device first calculates the detection total number of candidate PDCCHs and the total number of non-overlapping CCEs in the blind detection process only for SS1, then for SS1 and SS2, then for SS1, SS2 and SS3, and finally for SS1 and SS2 , SS3 and SS4.

Optionally, as shown in FIG. 6 , the process of determining the target search space may include the following steps.

Step 321, according to the ascending order of the search space identification, based on the number of candidate PDCCHs, the first BD count value and the second BD count value, determine the pth detection number, the pth detection number is the total number of detections of the candidate PDCCH in the previous p search spaces , the first p search spaces perform PDCCH transmission in the same time unit, and p is a positive integer.

Since different search spaces in the set of search spaces may have different time units for sending the PDCCH, the communication device needs to determine the target search space from the search spaces that send the PDDCH within the same time unit.

For example, SS1 transmits PDCCH in time slot 0 and time slot 5, SS2 transmits PDCCH in time slot 5, time slot 15 and time slot 20, and SS3 transmits PDCCH in time slot 10 and time slot 20. When the search space to be detected is determined, the calculation is only performed on SS1 and SS2, and when the search space to be detected in the time slot 20 is determined, the calculation is only performed on SS2 and SS3.

Correspondingly, when determining the pth detection number, the first p search spaces perform PDCCH transmission in the same time unit.

The total number of detections of the candidate PDCCHs is calculated according to the ascending order of the search space identifiers, that is, the total number of detections of the candidate PDCCHs is calculated according to the descending order of the priority of the search spaces.

Wherein, when the i-th search space is included in the current p search space, the detection times of the candidate PDCCH in the i-th search space is the number of candidate PDCCHs × the first BD count value; when the j-th search space is included in the current p search space, the The detection times of candidate PDCCHs in j search space is the number of candidate PDCCHs×the second BD count value.

It should be noted that the BD count value corresponding to other search spaces other than the associated search space is 1.

Schematically, as shown in Figure 4, the first detection number (SS1)=10, the second detection number (SS1+SS2)=10+5×1=15, the third detection number (SS1+SS2+SS3)= 10+5×1+5×1=20, the fourth detection number (SS1+SS2+SS3+SS4)=10+5×1+5×1+6=26; as shown in Figure 5, the first detection number =10, the second detection number=10+5×1=15, the third detection number=10+5×1+5×2=25, the fourth detection number=10+5×1+5×2+6= 31.

Step 322: Determine the total number of qth non-overlapping CCEs based on the number of non-overlapping CCEs in ascending order of the search space identifiers. The qth total number of non-overlapping CCEs is the total number of non-overlapping CCEs in the first q search spaces. PDCCH transmission is performed in time units, and q is a positive integer.

Schematically, as shown in Figures 4 and 5, the first total number of non-overlapping CCEs (SS1)=12, the second total number of non-overlapping CCEs (SS1+SS2)=12+8=20, the third total number of non-overlapping CCEs (SS1 +SS2+SS3)=12+8+10=30, the total number of fourth non-overlapping CCEs (SS1+SS2+SS3+SS4)=12+8+10+6=36.

Step 323: In response to the fact that the pth detection number is greater than the upper limit of the PDCCH detection number and the p-1th detection number is less than or equal to the upper limit of the PDCCH detection number, determine the first p-1 search spaces as the first candidate search spaces.

In this embodiment, the terminal device is set with an upper limit of the number of PDCCH detections, and the communication device detects whether the pth detection number is greater than the upper limit of the PDCCH detection number, that is, determines whether the PDCCH detection of the first p search spaces exceeds the upper limit of the PDCCH detection capability. If the detection number is greater than the upper limit of the PDCCH detection number, it is determined that the upper limit of the PDCCH detection capability is exceeded, so that the first p-1 search spaces are determined as the first candidate search spaces that meet the terminal's PDCCH detection capability; if the pth detection number is less than or equal to the upper limit of the PDCCH detection number , it is further detected whether the p+1th detection number is greater than the upper limit of the PDCCH detection number.

As shown in Figure 4, when the upper limit of the PDCCH detection number of the terminal equipment is 20 times, since the third detection number is equal to the upper limit of the PDCCH detection number, and the fourth detection number is greater than the upper limit of the PDCCH detection number, the terminal equipment determines the first candidate search space Includes SS1, SS2 and SS3.

As shown in Figure 5, when the upper limit of the PDCCH detection number of the terminal device is 20 times, since the second detection number is less than the upper limit of the PDCCH detection number, and the third detection number is greater than the upper limit of the PDCCH detection number, the communication device determines the first candidate search space Includes SS1 and SS2.

Step 324, in response to the fact that the total number of qth non-overlapping CCEs is greater than the upper limit of the number of non-overlapping CCEs, and the total number of q-1th non-overlapping CCEs is less than or equal to the upper limit of the number of non-overlapping CCEs, determine the first q-1 search spaces as the second candidate search space .

In this embodiment, the terminal device is set with an upper limit on the number of non-overlapping CCEs, and the communication device detects whether the total number of qth non-overlapping CCEs is greater than the upper limit on the number of non-overlapping CCEs, that is, to determine whether the CCE detection of the first q search spaces exceeds the upper limit of the CCE detection capability , if the total number of qth non-overlapping CCEs is greater than the upper limit of the number of non-overlapping CCEs, it is determined that the upper limit of the CCE detection capability is exceeded, so that the first p-1 search spaces are determined as the second candidate search spaces that meet the terminal CCE detection capability; If the total number of overlapping CCEs is less than or equal to the upper limit of the number of non-overlapping CCEs, it is further checked whether the total number of q+1th non-overlapping CCEs is greater than the upper limit of the number of non-overlapping CCEs.

As shown in Figures 4 and 5, when the upper limit of the number of non-overlapping CCEs of the terminal device is 32, since the total number of the third non-overlapping CCEs is less than the upper limit of the number of non-overlapping CCEs, and the fourth detection number is greater than the upper limit of the number of non-overlapping CCEs, the communication The device determines that the second candidate search space includes SS1, SS2 and SS3.

Step 325, determine the intersection of the first candidate search space and the second candidate search space as the target search space.

Since the requirement of the number of PDCCHs and the number of non-overlapping CCEs needs to be satisfied at the same time, the communication device determines the intersection of the first candidate search space and the second candidate search space as the target search space.

As shown in Figure 4, since the first candidate search spaces are SS1, SS2 and SS3, and the second candidate search spaces are SS1, SS2 and SS3, the communication device determines that the target search spaces are SS1, SS2 and SS3; as shown in Figure 5 , since the first candidate search spaces are SS1 and SS2, and the second candidate search spaces are SS1, SS2 and SS3, the communication device determines that the target search spaces are SS1 and SS2.

With the solution of this embodiment, when the terminal device performs blind detection of PDCCH, it can only perform blind detection on candidate PDCCHs in one search space in the associated search space, or perform blind detection on candidate PDCCHs in two search spaces in the associated search space at the same time. , it is also possible not to perform blind detection on candidate PDCCHs in any search space in the associated search space.

In the above-mentioned embodiment, each candidate PDCCH in the i-th search space corresponds to the first BD count value, and each candidate PDCCH in the j-th search space corresponds to the second BD count value as an example for illustration. In a possible situation, when there is a candidate PDCCH in the associated search space that uses the same CCE, scrambling identifier, and DCI format as the candidate PDCCH in other search spaces, and the other search space performs blind detection before the associated search space, The corresponding candidate PDCCH in the associated search space does not need blind detection, that is, the candidate PDCCH is not included in the BD count value.

In view of the above situation, in a possible implementation manner, before calculating the number of PDCCH detections, the communication device needs to detect whether there is a candidate PDCCH in the i-th search space that uses the same CCE, scrambling identifier, and DCI format, wherein the search space identifier of the kth search space is smaller than the search space identifier of the ith search space, that is, the blind detection priority of the kth search space is higher than that of the ith search space.

In response to the fact that there is no candidate PDCCH in the i-th search space and the candidate PDCCH in the k-th search space use the same CCE, scrambling identifier, and DCI format, the communication device determines that each candidate PDCCH in the associated search space is included in the calculation of the number of PDCCH detections, and also That is, each candidate PDCCH in the i-th search space corresponds to the first BD count value, and each candidate PDCCH in the j-th search space corresponds to the second BD count value.

And when there is a target candidate PDCCH in the i-th search space that uses the same CCE, scrambling identifier, and DCI format as the candidate PDCCH in the k-th search space, the communication device determines that the target candidate PDCCH is not included in the calculation of the number of PDCCH detections, that is, the target candidate PDCCH corresponds to The BD count value is 0.

Moreover, since the i-th search space is associated with the j-th search space, the communication device needs to further detect whether the associated candidate PDCCH associated with the target candidate PDCCH in the j-th search space uses the same CCE, scrambling ID and DCI format.

In a possible implementation manner, the communication device determines the associated candidate PDCCH associated with the target candidate PDCCH in the jth search space. Wherein, the associated candidate PDCCH has the same index as the target candidate PDCCH. For example, when the first PDCCH candidate in the i-th search space is the target candidate PDCCH, the communication device determines that the first PDCCH candidate in the j-th search space is the associated candidate PDCCH.

Further, the communication device detects whether there is a candidate PDCCH in the lth search space and the associated candidate PDCCH uses the same CCE, scrambling identifier, and DCI format, wherein the search space identifier of the lth search space is smaller than the search space identifier of the jth search space, That is, the blind detection priority of the lth search space is higher than that of the jth search space.

In response to the associated candidate PDCCH using the same CCE, scrambling identifier, and DCI format as the candidate PDCCH in the first search space, the communication device determines that the associated candidate PDCCH is not included in the total number of candidate PDCCH blind detection times;

In response to the fact that there is no candidate PDCCH that uses the same CCE, scrambling identifier, and DCI format as the associated candidate PDCCH in the first search space, the communication device determines that the associated candidate PDCCH is included in the calculation of the number of PDCCH detections, and determines that the BD count value of the associated candidate PDCCH is 1 .

In an illustrative example, the set of search spaces includes SS1 (the number of candidate PDCCHs is 10), SS2 (the number of candidate PDCCHs is 5), SS3 (the number of candidate PDCCHs is 6) and SS4 (the number of candidate PDCCHs is 5), wherein, SS2 and SS4 are associated search spaces. Since the first candidate PDCCH in SS2 and the second candidate PDCCH in SS1 use the same CCE, scrambling identifier, and DCI format, the communication device determines that the first candidate PDCCH in SS2 is not included in the calculation of the number of PDCCH detections; further, because SS1 and SS3 There is no candidate PDCCH that uses the same CCE, scrambling identifier, and DCI format as the first candidate PDCCH in SS4, so the communication device determines that the first candidate PDCCH in SS4 is included in the calculation of the number of PDCCH detections.

For example, when the BD count value corresponding to SS2 is 1, and the BD count value corresponding to SS4 is 1, the calculated second detection number is 10+4=14, and the calculated fourth detection number is 10+4+6+5 =25.

Please refer to FIG. 7, which shows a flow chart of a method for determining a search space shown in another exemplary embodiment of the present application. This embodiment applies this method to a communication device (terminal device 10 or network device shown in FIG. 1 20) as an example for illustration.

Step 710, determine the number of candidate PDCCHs in each search space in the search space set, and the number of non-overlapping CCEs in each search space.

Schematically, as shown in Figures 8 and 9, the search space set search space SS1 contains 10 candidate PDCCHs, and the number of non-overlapping CCEs is 12; the search space SS2 contains 5 candidate PDCCHs, and the number of non-overlapping CCEs is 8 ; The search space SS3 includes 5 candidate PDCCHs, and the number of non-overlapping CCEs is 10; the search space SS4 includes 6 candidate PDCCHs, and the number of non-overlapping CCEs is 6.

Step 720: Determine the target search space in the search space set based on the number of candidate PDCCHs, the number of non-overlapping CCEs, the BD count value, and the blind detection capability of the terminal.

When the two associated search spaces are considered as a whole, the determined target search space either includes the associated search space or does not include the associated search space at the same time. Correspondingly, when determining the target search space that meets the terminal blind detection capability, it is not the The BD count value is mapped to the i-th search space and the j-th search space respectively (that is, there is no need to determine the first BD count value and the second BD count value), but the BD count value is mapped to the entire associated search space.

Optionally, the terminal communication device calculates the number of PDCCH detections based on the number of candidate PDCCHs and the BD count value, and calculates the total number of non-overlapping CCEs based on the number of non-overlapping CCEs, so as to determine the target search space based on the calculation results and the blind detection capability of the terminal.

Optionally, as shown in FIG. 10 , the process of determining the target search space may include the following steps.

Step 721, according to the descending order of the priority of the search space, based on the number of candidate PDCCHs and the BD count value, determine the xth detection number, the xth detection number is the total number of detections of the candidate PDCCHs in the search space corresponding to the previous x priorities, the first x The search spaces corresponding to the priorities perform PDCCH transmission in the same time unit, and the search spaces corresponding to the first x priorities include associated search spaces at the same time, or do not include associated search spaces at the same time, and x is a positive integer.

Search space concentration, by default, the priority of the search space is negatively correlated with its search space ID, that is, the smaller the search space ID, the higher the priority of the search space. For example, when the search spaces are concentrated, the priority of the search spaces is SS1 > SS2 > SS3 > SS4.

When the associated search space is taken as a whole, the two search spaces in the associated search space need to calculate the number of PDCCH detections at the same time. When the search space identifiers of the associated search spaces are not adjacent, that is, there are other search spaces between the i-th search space and the j-th search space, in order to ensure that the two search spaces in the associated search space simultaneously perform the PDCCH detection number calculation, the communication device It is necessary to set the i-th search space and the j-th search space to the same priority, so that when the subsequent PDCCH detection number is calculated based on the priority of the search space, other search spaces between the i-th search space and the j-th search space can be skipped, And simultaneously calculate the i-th search space and the j-th search space.

In a possible implementation manner, when the priority of the i-th search space is the same as that of the j-th search space, the priority of the j-th search space is set as the priority of the i-th search space; or, the priority of the i-th search space The level is set as the priority of the jth search space. In other words, the priority of the two search spaces in the associated search space may be the priority of the search space with the smaller search space identifier, or the priority of the search space with the larger search space identifier.

In a schematic example, if SS2 and SS4 in the search space set {SS1, SS2, SS3, SS4} are associated search spaces, the priority of SS4 is set as the priority of SS2, and the search space set The priority of SS2 is SS1>SS2=SS4>SS3; or, the priority of SS2 is set to the priority of SS4, and at this time the priority of the search space in the search space set is SS1>SS3>SS2=SS4.

Further, when the communication device calculates the total number of detections of candidate PDCCHs, if the search spaces corresponding to the first x priorities include associated search spaces at the same time, the total number of detections of candidate PDCCHs corresponding to the associated search spaces is the number of candidate PDCCHs × BD count value.

Schematically, as shown in FIG. 8, SS2 and SS3 in the search space set {SS1, SS2, SS3, SS4} are associated search spaces, and the BD count value is 2, and the calculated first detection number (SS1)=10, The second detection number (SS1+SS2+SS3)=10+5×2=20, the third detection number (SS1+SS2+SS3+SS4)=10+5×2+6=26; as shown in Figure 5, SS2 and SS3 in the search space set {SS1, SS2, SS3, SS4} are associated search spaces, and the BD count value is 3, the first detection number=10, the second detection number=10+5×3=25, The third detection number=10+5×3+6=31.

In other possible embodiments, if SS2 and SS4 are associated search spaces, and the priority of SS4 is set as the priority of SS2, the first detection number is the total number of detections of candidate PDDCHs in SS1, and the second detection number is The total number of detections of candidate PDDCHs in SS1, SS2 and SS4, the third detection number is the total number of detections of candidate PDDCHs in SS1, SS2, SS4 and SS3; if SS2 and SS4 are associated search spaces, and the priority of SS2 is set to SS4 priority, the first detection number is the total number of detections of candidate PDDCHs in SS1, the second detection number is the total number of detections of candidate PDDCHs in SS1 and SS3, and the third detection number is the total number of detections of candidate PDDCHs in SS1, SS3, SS2 and SS4 The total number of PDDCH detections.

Step 722: Determine the total number of y-th non-overlapping CCEs based on the number of non-overlapping CCEs in descending order according to the priority of the search space. Priority-corresponding search spaces perform PDCCH transmission in the same time unit, and the first y priority-corresponding search spaces include associated search spaces or do not include associated search spaces at the same time, and y is a positive integer.

Similar to calculating the total number of candidate PDCCH detections in the above steps, the communication device calculates the total number of non-overlapping CCEs in the search space in descending order of priority of the search space based on the number of non-overlapping CCEs in each search space. Among them, the number of non-overlapping CCEs corresponding to the associated search space is included in the calculation at the same time, or is not included in the calculation at the same time.

Schematically, as shown in Figures 8 and 9, the first total number of non-overlapping CCEs (SS1)=12, the second total number of non-overlapping CCEs (SS1+SS2+SS3)=12+8+10=30, and the third non-overlapping The total number of CCEs (SS1+SS2+SS3+SS4)=12+8+10+6=36.

In other possible embodiments, if SS2 and SS4 are associated search spaces, and the priority of SS4 is set as the priority of SS2, the total number of the first non-overlapping CCEs is the number of non-overlapping CCEs in SS1, and the second non-overlapping CCEs The total number is the sum of the number of non-overlapping CCEs in SS1, SS2, and SS4, and the third total number of non-overlapping CCEs is the sum of the number of non-overlapping CCEs in SS1, SS2, SS4, and SS3; if SS2 and SS4 are associated search spaces, and SS2 has priority If the level is set to the priority of SS4, the first total number of non-overlapping CCEs is the number of non-overlapping CCEs in SS1, the second total number of non-overlapping CCEs is the sum of the number of non-overlapping CCEs in SS1 and SS3, and the third total number of non-overlapping CCEs is SS1 , SS3, SS2 and SS4 do not overlap the number of CCEs.

Step 723: In response to the fact that the x-th detection number is greater than the upper limit of the PDCCH detection number and the x-1th detection number is less than or equal to the upper limit of the PDCCH detection number, determine the search spaces corresponding to the first x-1 priorities as the first candidate search spaces.

In this embodiment, the terminal device is provided with an upper limit of the number of PDCCH detections, and the communication device detects whether the xth detection number is greater than the upper limit of the PDCCH detection number, that is, determines whether the PDCCH detection of the first x priority search spaces exceeds the upper limit of the PDCCH detection capability, If the xth detection number is greater than the upper limit of the PDCCH detection number, it is determined that the upper limit of the PDCCH detection capability is exceeded, so that the search space of the first x-1 priority is determined as the first candidate search space that meets the terminal PDCCH detection capability; if the xth detection number If it is less than or equal to the upper limit of the PDCCH detection number, it is further checked whether the x+1th detection number is greater than the upper limit of the PDCCH detection number. Among them, the difference between the search space of the first x priority and the search space of the first x-1 priority may be 1 (when the search space of the xth priority does not belong to the associated search space) or 2 (the xth priority when the prioritized search space belongs to the associated search space).

As shown in Figure 8, when the upper limit of the PDCCH detection number of the terminal device is 20 times, since the second detection number is equal to the upper limit of the PDCCH detection number, and the third detection number is greater than the upper limit of the PDCCH detection number, the communication device determines the first candidate search space Includes SS1, SS2 and SS3.

As shown in Figure 5, when the upper limit of the PDCCH detection number of the terminal device is 20 times, since the first detection number is less than the upper limit of the PDCCH detection number, and the second detection number is greater than the upper limit of the PDCCH detection number, the communication device determines the first candidate search space including SS1.

Step 724: In response to the fact that the total number of y-th non-overlapping CCEs is greater than the upper limit of the number of non-overlapping CCEs, and the total number of y-1th non-overlapping CCEs is less than or equal to the upper limit of the number of non-overlapping CCEs, determine the search space corresponding to the first y-1 priorities as the first Two candidate search spaces.

In this embodiment, the terminal device is set with an upper limit for the number of non-overlapping CCEs, and the communication device detects whether the total number of y-th non-overlapping CCEs is greater than the upper limit for the number of non-overlapping CCEs, that is, to determine whether the CCE detection of the previous y priority search spaces exceeds the CCE The upper limit of the detection capability, if the total number of y-th non-overlapping CCEs is greater than the upper limit of the number of non-overlapping CCEs, it is determined that the upper limit of the CCE detection capability is exceeded, so that the search space of the first y-1 priorities is determined as the second candidate search that meets the terminal CCE detection capability space; if the total number of y-th non-overlapping CCEs is less than or equal to the upper limit of the number of non-overlapping CCEs, it is further checked whether the total number of q+1th non-overlapping CCEs is greater than the upper limit of the number of non-overlapping CCEs.

As shown in Figures 8 and 9, when the upper limit of non-overlapping CCEs of the terminal device is 32, since the second total number of non-overlapping CCEs is less than the upper limit of non-overlapping CCEs, and the third detection number is greater than the upper limit of non-overlapping CCEs, the communication The device determines that the second candidate search space includes SS1, SS2 and SS3.

Step 725: Determine the intersection of the first candidate search space and the second candidate search space as the target search space.

As shown in Figure 8, since the first candidate search spaces are SS1, SS2 and SS3, and the second candidate search spaces are SS1, SS2 and SS3, the communication device determines that the target search spaces are SS1, SS2 and SS3; as shown in Figure 9 , since the first candidate search space is SS1, and the second candidate search spaces are SS1, SS2, and SS3, the communication device determines that the target search space is SS1.

With the solution of this embodiment, when the terminal device performs PDCCH blind detection, it either performs blind detection on candidate PDCCHs in two search spaces in the associated search space at the same time, or does not perform blind detection on candidate PDCCHs in any search space in the associated search space.

In a possible situation, when the associated search space is taken as a whole, and the candidate PDCCH in the associated search space uses the same CCE, scrambling identifier, and DCI format as the candidate PDCCH in other search spaces, and the other search space is When blind detection is performed before the search space, the corresponding candidate PDCCH in the associated search space does not need blind detection, that is, the candidate PDCCH is not included in the BD count value.

In view of the above situation, in a possible implementation manner, before calculating the number of PDCCH detections, the communication device detects whether there is a candidate PDCCH in the associated search space that uses the same CCE, scrambling identifier and DCI format as the candidate PDCCH in the kth search space . Wherein, the search space identifier of the kth search space is smaller than the search space identifier of the associated search space, that is, the blind detection priority of the kth search space is higher than that of the associated search space.

In response to the fact that there is no candidate PDCCH in the associated search space that uses the same CCE, scrambling identifier, and DCI format as the candidate PDCCH in the kth search space, the communication device determines that each candidate PDCCH in the associated search space is included in the calculation of the number of PDCCH detections.

And when there is a target candidate PDCCH in the associated search space that uses the same CCE, scrambling identifier, and DCI format as the candidate PDCCH in the first search space, the communication device determines that the target candidate PDCCH and the associated candidate PDCCH corresponding to the target candidate PDCCH are not included in the PDCCH Detection count calculation.

For example, when there is a target candidate PDCCH in the i-th search space that uses the same CCE, scrambling identifier, and DCI format as the candidate PDCCH in the l-th search space, the communication device determines the target candidate PDCCH, and the target candidate PDCCH in the j-th search space Candidate PDCCHs with the same PDCCH index are not included in PDCCH detection. Correspondingly, when calculating the number of PDCCH detections, the number of candidate PDCCHs corresponding to the associated search space is reduced by one.

In an illustrative example, the set of search spaces includes SS1 (the number of candidate PDCCHs is 10), SS2 (the number of candidate PDCCHs is 5), SS3 (the number of candidate PDCCHs is 5), and SS4 (the number of candidate PDCCHs is 6), wherein, SS2 and SS3 are associated search spaces. Since the first PDCCH candidate in SS2 and the second PDCCH candidate in SS1 use the same CCE, scrambling identifier, and DCI format, the terminal device determines that the first PDCCH candidate in SS2 and the first PDCCH candidate in SS3 are not included in the calculation of the number of PDCCH detections. For example, when the value of BD count corresponding to the associated search space is 2, the number of PDCCH detections in the associated search space is (5-1)×2=8.

In the above-mentioned embodiment, the i-th search space and the j-th search space are used to transmit the PDCCH in the same time unit as an example. In another possible scenario, the network side configures the associated search space for PDCCH repeated transmission The detection moments of are not in the same time unit, that is, the associated i-th search space and j-th search space may perform PDCCH transmission in different time units. Schematically, the i-th search space is used for PDCCH transmission in the first time unit (such as the first slot), and the j-th search space is used for PDCCH transmission in the second time unit (such as the second slot).

Correspondingly, when the communication device selects the target search space from the search space set, it needs to determine the first target search space corresponding to the first time unit and the second target search space corresponding to the second time unit. In a possible implementation manner, the communication device may include the following steps when determining the target search space:

1. Based on the first BD count value and the blind detection capability of the terminal, determine the first target search space corresponding to the first time unit in the search space set.

Optionally, the blind detection capability of the terminal includes the number of detections of candidate PDCCHs and non-overlapping CCEs within a unit time (slot or span). Since the detection number of candidate PDCCHs in the search space is related to the BD count value of the candidate PDCCH, in a possible implementation manner, the communication device determines the number of candidate PDCCHs in each search space corresponding to the first time unit in the search space set, and The number of non-overlapping CCEs in each search space, so as to determine the first target search space based on the number of candidate PDCCHs, the number of non-overlapping CCEs, the first BD count value corresponding to the i-th search space, and the terminal blind detection capability (the terminal can The blind detection of each search space in the first target search space is completed within the unit).

For the specific process of determining the first target search space, reference may be made to the foregoing embodiments, and details are not described in this embodiment here.

In an illustrative example, in the search space set {SS1, SS2, SS3, SS4, SS5, SS6}, SS1, SS2, and SS3 correspond to the first time unit, SS4, SS5, and SS6 correspond to the second time unit, and SS2 and SS5 are associated search spaces. When the BD count value is 3, the communication device determines that the first BD count value corresponding to SS2 is 1, and the second BD count value corresponding to SS5 is 2. Based on the number of candidate PDCCHs, the number of non-overlapping CCEs, the first BD count value of 1, and the terminal blind detection capability of SS1, SS2, and SS3, the communication device determines that the first target search space includes SS1 and SS2.

2. Based on the second BD count value and the blind detection capability of the terminal, determine the second target search space corresponding to the second time unit in the search space set.

Similar to the process of determining the first target search space, the communication device determines the number of candidate PDCCHs in each search space corresponding to the second time unit in the search space set, and the number of non-overlapping CCEs in each search space, so that based on the number of candidate PDCCHs, non-overlapping CCEs The quantity, the second BD count value corresponding to the jth search space, and the blind detection capability of the terminal determine the second target search space (the terminal can complete the blind detection of each search space in the second target search space within the second time unit).

For the specific process of determining the second target search space, reference may be made to the foregoing embodiments, and details are not described in this embodiment here.

In an illustrative example, in the search space set {SS1, SS2, SS3, SS4, SS5, SS6}, SS1, SS2, and SS3 correspond to the first time unit, SS4, SS5, and SS6 correspond to the second time unit, and SS2 and SS5 are associated search spaces. When the BD count value is 3, the communication device determines that the first BD count value corresponding to SS2 is 1, and the second BD count value corresponding to SS5 is 2. Based on the number of candidate PDCCHs, the number of non-overlapping CCEs, the second BD count value 2, and the terminal blind detection capability of SS4, SS5, and SS6, the communication device determines that the second target search space includes SS4.

In some embodiments, when the terminal performs PDCCH blind detection, in addition to detecting two associated candidate PDCCHs in the associated search space, it can also detect two associated candidate PDCCHs after soft combining. Therefore, the communication device needs to combine The first time unit corresponds to the inclusion of the i-th search space in the first target search space, and the second target search space corresponding to the second time unit is determined. In another possible implementation manner, the communication device may include the following steps when determining the target search space:

For the implementation manner of this step, reference may be made to the foregoing embodiments, and details are not described in this embodiment here.

2. Based on the second BD count value, the blind detection capability of the terminal, and the first target search space, determine the second target search space corresponding to the second time unit in the search space set.

Different from the above-mentioned embodiment, no matter whether the i-th search space is included in the first target search space, the second BD count value corresponding to the j-th search space is 2 (when the BD coun value is 3), in this embodiment , the communication device needs to dynamically determine the second BD count value corresponding to the j-th search space according to whether the first target search space includes the i-th search space, and then determine the second target search space according to the dynamically determined second BD count value.

In a possible implementation manner, in response to the i-th search space being included in the first target search space, the communication device determines the second target corresponding to the second time unit in the search space set based on the second BD count value and the blind detection capability of the terminal search space.

In response to the fact that the i-th search space is not included in the first target search space, since the i-th search space is ignored in the first time unit, soft merge detection cannot be performed on the i-th search space and the j-th search space in the second time unit , and then the communication device updates the second BD count value to 1. When determining the second target search space, the communication device determines the second target search space corresponding to the second time unit in the search space set based on the updated second BD count value and the blind detection capability of the terminal.

In an illustrative example, in the search space set {SS1, SS2, SS3, SS4, SS5, SS6}, SS1, SS2, and SS3 correspond to the first time unit, SS4, SS5, and SS6 correspond to the second time unit, and SS2 and SS5 are associated search spaces. When the BD count value is 3, the communication device initially determines that the first BD count value corresponding to SS2 is 1, and the second BD count value corresponding to SS5 is 2.

Based on the number of candidate PDCCHs, the number of non-overlapping CCEs, the first BD count value of 1, and the terminal blind detection capability of SS1, SS2, and SS3, the communication device determines that the first target search space includes SS1 and SS2. When determining the second target search space, since the associated search space SS2 of SS5 is located in the first target search space, the communication device is based on the number of candidate PDCCHs, the number of non-overlapping CCEs, the second BD count value 2, and With terminal blind detection capability, the communication device determines that the second target search space includes SS4.

Based on the number of candidate PDCCHs, the number of non-overlapping CCEs, the first BD count value of 1, and the terminal blind detection capability of SS1, SS2, and SS3, the communication device determines that the first target search space includes SS1. When determining the second target search space, since the associated search space SS2 of SS5 does not belong to the first target search space, the communication device based on the number of candidate PDCCHs, the number of non-overlapping CCEs, and the updated second BD of SS4, SS5, and SS6 The count value is 1 and the blind detection capability of the terminal, the communication device determines that the second target search space includes SS4 and SS5.

It can be understood that the above method embodiments may be implemented individually or in combination, which is not limited in the present application.

The following are device embodiments of the present application, which can be used to implement the method embodiments of the present application. For details not disclosed in the device embodiments of the present application, please refer to the method embodiments of the present application.

Please refer to FIG. 11 , which shows a block diagram of an apparatus for determining a search space provided by an embodiment of the present application. The device has the function of realizing the above method example, and the function may be realized by hardware, or may be realized by executing corresponding software by hardware. The device can include:

A determination module 1110, configured to determine a target search space in the search space set based on a BD count value and a terminal blind detection capability, the BD count value is used when the terminal device performs PDCCH repeated transmission, and the BD count value is an integer greater than or equal to 2 , the set of search spaces includes an associated search space, and the associated search space is used for repeated transmission of the PDCCH.

In a possible implementation manner, the associated search space is the i-th search space and the j-th search space in the set of search spaces, where i and j are positive integers;

The search space identifiers of the i-th search space and the j-th search space are continuous, or the search space identifiers of the i-th search space and the j-th search space are discontinuous.

In a possible implementation manner, the BD count value is n;

The determining module 1110 includes:

The first determining unit is configured to determine that the first BD count value corresponding to the i-th search space is m, and the second BD count value corresponding to the j-th search space is n-m, where m is a positive integer less than n;

A second determining unit, configured to determine the target search space in the set of search spaces based on the first BD count value, the second BD count value, and the blind detection capability of the terminal.

In a possible implementation manner, the BD count value is 2, the first BD count value is 1, and the second BD count value is 1;

The BD count value is 3, the first BD count value is 1, and the second BD count value is 2.

In a possible implementation manner, the search space identifier of the i-th search space is smaller than the search space identifier of the j-th search space.

In a possible implementation manner, the second determining unit is configured to:

Determine the number of candidate PDCCHs in each search space in the search space set, and the number of non-overlapping CCEs in each search space;

Determine the target search space in the set of search spaces based on the number of candidate PDCCHs, the number of non-overlapping CCEs, the first BD count value, the second BD count value, and the blind detection capability of the terminal.

In a possible implementation manner, the search is determined based on the number of candidate PDCCHs, the number of non-overlapping CCEs, the first BD count value, the second BD count value, and the blind detection capability of the terminal. When the target search space in the space set, the second determining unit is specifically configured to:

According to the ascending order of the search space identification, based on the number of candidate PDCCHs, the first BD count value and the second BD count value, determine the pth detection number, the pth detection number is the candidate in the first p search spaces The total number of detection times of the PDCCH, the first p search spaces perform PDCCH transmission in the same time unit, and p is a positive integer;

According to the ascending order of search space identification, based on the number of non-overlapping CCEs, determine the qth total number of non-overlapping CCEs, the qth total number of non-overlapping CCEs is the total number of non-overlapping CCEs in the first q search spaces, and the first q search The space performs PDCCH transmission in the same time unit, and q is a positive integer;

In response to the p-th detection number being greater than the upper limit of the PDCCH detection number, and the p-1th detection number being less than or equal to the PDCCH detection number upper limit, determining the first p-1 search spaces as the first candidate search space;

In response to the total number of qth non-overlapping CCEs being greater than the upper limit of the number of non-overlapping CCEs, and the total number of q-1th non-overlapping CCEs being less than or equal to the upper limit of the number of non-overlapping CCEs, determining the first q-1 search spaces as the second candidate search space space;

An intersection of the first candidate search space and the second candidate search space is determined as the target search space.

In a possible implementation manner, the determining module 1110 further includes a third determining unit, configured to:

In response to the fact that there is no candidate PDCCH in the i-th search space and the candidate PDCCH in the k-th search space use the same CCE, scrambling identifier, and DCI format, determine the number of PDCCH detections for each of the candidate PDCCHs in the associated search space Calculate, the search space identifier of the k-th search space is smaller than the search space identifier of the i-th search space.

In a possible implementation manner, the determining module 1110 further includes a fourth determining unit, configured to:

In response to the fact that the target candidate PDCCH in the i-th search space uses the same CCE, scrambling identifier, and DCI format as the candidate PDCCH in the k-th search space, it is determined that the target candidate PDCCH is not included in the calculation of the number of PDCCH detections.

In a possible implementation manner, the determining module 1110 further includes:

A fifth determining unit, configured to determine an associated candidate PDCCH associated with the target candidate PDCCH in the jth search space;

The sixth determining unit is configured to determine that the associated candidate PDCCH is not included in the total number of candidate PDCCH blind detection times in response to the associated candidate PDCCH using the same CCE, scrambling identifier, and DCI format as the candidate PDCCH in the first search space, The search space identifier of the lth search space is smaller than the search space identifier of the jth search space;

The seventh determination unit is configured to determine that the associated candidate PDCCH is included in the calculation of the number of PDCCH detections in response to the fact that there is no candidate PDCCH using the same CCE, scrambling identifier, and DCI format as the associated candidate PDCCH in the first search space, And the BD count value of the associated candidate PDCCH is 1.

In a possible implementation manner, the target search space includes the associated search space at the same time, or does not include the associated search space at the same time;

The determining module 1110 includes:

An eighth determining unit, configured to determine the number of candidate PDCCHs in each search space in the search space set, and the number of non-overlapping CCEs in each search space;

A ninth determining unit, configured to determine the target search space in the set of search spaces based on the number of candidate PDCCHs, the number of non-overlapping CCEs, the BD count value, and the blind detection capability of the terminal.

In a possible implementation manner, the ninth determining unit is configured to:

According to the descending order of the priority of the search space, based on the number of candidate PDCCHs and the BD count value, determine the xth detection number, the xth detection number is the total number of detections of the candidate PDCCHs in the search space corresponding to the previous x priorities, The search spaces corresponding to the first x priorities perform PDCCH transmission in the same time unit, and the search spaces corresponding to the first x priorities include the associated search space at the same time, or do not include the associated search space at the same time, and x is positive integer;

According to the descending order of the priority of the search space, based on the number of non-overlapping CCEs, determine the yth total number of non-overlapping CCEs, the yth total number of non-overlapping CCEs is the total number of non-overlapping CCEs in the search space corresponding to the previous y priority, the The search spaces corresponding to the first y priorities perform PDCCH transmission in the same time unit, and the search spaces corresponding to the first y priorities include the associated search space at the same time, or do not include the associated search space at the same time, and y is a positive integer;

In response to the xth detection number being greater than the upper limit of the PDCCH detection number, and the x-1th detection number being less than or equal to the upper limit of the PDCCH detection number, determining the search space corresponding to the first x-1 priority as the first candidate search space;

In response to the fact that the total number of y-th non-overlapping CCEs is greater than the upper limit of the number of non-overlapping CCEs, and the total number of y-1th non-overlapping CCEs is less than or equal to the upper limit of the number of non-overlapping CCEs, the search space corresponding to the first y-1 priorities is determined as a second candidate search space;

In a possible implementation manner, the i-th search space and the j-th search space have the same priority;

The priority of the jth search space is set to the priority of the ith search space;

or,

The priority of the i-th search space is set as the priority of the j-th search space.

In a possible implementation manner, the determining module 1110 further includes a tenth determining unit, configured to:

In response to the fact that there is no candidate PDCCH in the associated search space and the candidate PDCCH in the kth search space uses the same CCE, scrambling identifier, and DCI format, determine that each of the candidate PDCCHs in the associated search space is included in the calculation of the number of PDCCH detections , the search space identifier of the kth search space is smaller than the search space identifier of the associated search space.

In a possible implementation manner, the determining module 1110 further includes an eleventh determining unit, configured to:

Responding to the existence of a target candidate PDCCH in the associated search space that uses the same CCE, scrambling identifier, and DCI format as the candidate PDCCH in the first search space, determine the target candidate PDCCH and the associated candidate corresponding to the target candidate PDCCH The PDCCH is not included in the calculation of the number of PDCCH detections.

In a possible implementation manner, the i th search space is used for PDCCH transmission in a first time unit, the j th search space is used for PDCCH transmission in a second time unit, and the first time The unit is different from the second time unit.

Based on the first BD count value and the blind detection capability of the terminal, determine a first target search space corresponding to the first time unit in the search space set;

Based on the second BD count value and the blind detection capability of the terminal, determine a second target search space corresponding to the second time unit in the set of search spaces.

Based on the second BD count value, the blind detection capability of the terminal, and the first target search space, determine a second target search space corresponding to the second time unit in the search space set.

In a possible implementation manner, the second determining unit is specifically configured to:

In response to the i-th search space being included in the first target search space, based on the second BD count value and the blind detection capability of the terminal, determine the search space set corresponding to the second time unit the second target search space;

In response to the i-th search space not being included in the first target search space, updating the second BD count value to 1; based on the updated second BD count value and the blind detection capability of the terminal, Determine the second target search space corresponding to the second time unit in the set of search spaces.

In a possible implementation manner, the associated search spaces respectively correspond to different CORESETs, and under the same aggregation level, candidate PDCCHs with the same index in the associated search spaces are used to transmit the same DCI, and the DCI is used to call the same physical channel.

In a possible implementation manner, the BD count value is reported to the network device when the terminal device performs PDCCH repeated transmission, or the BD count value is a default value, or the BD count value is determined by the network The device selects and configures multiple candidate BD count values reported by the terminal device.

In a possible implementation manner, the associated search space is configured through high-layer signaling or physical layer signaling.

In a possible implementation manner, the blind detection capability of the terminal includes: an upper limit of the number of PDCCH detections within a time unit, and/or an upper limit of the number of non-overlapping CCEs.

In a possible implementation manner, the apparatus further includes: a blind detection module, configured to perform PDCCH blind detection on the target search space.

In a possible implementation manner, the apparatus further includes: a scheduling module, configured to perform terminal scheduling on the candidate PDCCH in the target search space.

It should be noted that when the device provided by the above embodiment realizes its functions, it only uses the division of the above-mentioned functional modules as an example for illustration. In practical applications, the above-mentioned function allocation can be completed by different functional modules according to actual needs. That is, the content structure of the device is divided into different functional modules to complete all or part of the functions described above.

Regarding the apparatus in the foregoing embodiments, the specific manner in which each module executes operations has been described in detail in the embodiments related to the method, and will not be described in detail here.

Please refer to FIG. 12 , which shows a schematic structural diagram of a communication device provided by an embodiment of the present application, and the communication device may implement the terminal device or network device in the foregoing embodiments. The communication device may include: a processor 1201 , a receiver 1202 , a transmitter 1203 , a memory 1204 and a bus 1205 .

The processor 1201 includes one or more processing cores, and the processor 1201 executes various functional applications and information processing by running software programs and modules.

The receiver 1202 and the transmitter 1203 can be implemented as a transceiver, and the transceiver can be a communication chip.

The memory 1204 is connected to the processor 1201 through the bus 1205 .

The memory 1204 may be used to store a computer program, and the processor 1201 is used to execute the computer program, so as to implement various steps performed by the terminal device or the network device in the foregoing method embodiments.

In addition, the memory 1204 can be realized by any type of volatile or nonvolatile storage device or their combination, and the volatile or nonvolatile storage device includes but not limited to: RAM (Random-Access Memory, Random Access Memory) And ROM (Read-Only Memory, read-only memory), EPROM (Erasable Programmable Read-Only Memory, erasable programmable read-only memory), EEPROM (Electrically Erasable Programmable Read-Only Memory, electrically erasable programmable read-only memory memory), flash memory or other solid-state storage technology, CD-ROM (Compact Disc Read-Only Memory, CD-ROM), DVD (Digital Video Disc, high-density digital video disc) or other optical storage, tape cartridges, tapes, disks storage or other magnetic storage devices.

The processor and the transceiver involved in the embodiments of the present application may execute the methods for determining the search space provided in the foregoing embodiments, which will not be repeated here.

In a possible implementation manner, the processor 1201 is configured to determine a target search space in the search space set based on a BD count value and a terminal blind detection capability, where the BD count value is used when the terminal device performs PDCCH repeated transmission, and the The BD count value is an integer greater than or equal to 2, the set of search spaces includes an associated search space, and the associated search space is used for repeated transmission of the PDCCH.

Optionally, when the communication device is a terminal device, the processor 1201 is further configured to perform PDCCH blind detection on the target search space.

Optionally, when the communication device is a network device, the processor 1201 is further configured to perform terminal scheduling on the candidate PDCCH in the target search space.

The embodiment of the present application also provides a computer-readable storage medium, where a computer program is stored in the storage medium, and the computer program is used to be executed by a processor of a terminal device or a network device, so as to realize the above method for determining a search space .

Optionally, the computer-readable storage medium may include: ROM (Read-Only Memory, read-only memory), RAM (Random-Access Memory, random access memory), SSD (Solid State Drives, solid state drive) or an optical disc, etc. Wherein, the random access memory may include ReRAM (Resistance Random Access Memory, resistive random access memory) and DRAM (Dynamic Random Access Memory, dynamic random access memory).

An embodiment of the present application further provides a chip, the chip includes a programmable logic circuit and/or program instructions, and when the chip is run on a terminal device, it is used to implement the above method for determining a search space.

The embodiment of the present application also provides a computer program product or computer program, the computer program product or computer program includes computer instructions, the computer instructions are stored in a computer-readable storage medium, and the processor of the terminal device or network device obtains from The computer-readable storage medium reads and executes the computer instructions, so as to realize the above method for determining the search space.

It should be understood that the "indication" mentioned in the embodiments of the present application may be a direct indication, may also be an indirect indication, and may also mean that there is an association relationship. For example, A indicates B, which can mean that A directly indicates B, for example, B can be obtained through A; it can also indicate that A indirectly indicates B, for example, A indicates C, and B can be obtained through C; it can also indicate that there is an association between A and B relation.

In the description of the embodiments of the present application, the term "corresponding" may indicate that there is a direct or indirect correspondence between the two, or that there is an association between the two, or that it indicates and is indicated, configuration and is configuration etc.

The "plurality" mentioned herein means two or more. "And/or" describes the association relationship of associated objects, indicating that there may be three types of relationships, for example, A and/or B may indicate: A exists alone, A and B exist simultaneously, and B exists independently. The character "/" generally indicates that the associated objects are an "or" relationship.

In addition, the numbering of the steps described herein only exemplarily shows a possible sequence of execution among the steps. In some other embodiments, the above-mentioned steps may not be executed according to the order of the numbers, such as two different numbers The steps are executed at the same time, or two steps with different numbers are executed in the reverse order as shown in the illustration, which is not limited in this embodiment of the present application.

Those skilled in the art should be aware that, in the foregoing one or more examples, the functions described in the embodiments of the present application may be implemented by hardware, software, firmware or any combination thereof. When implemented in software, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media may be any available media that can be accessed by a general purpose or special purpose computer.

The above are only exemplary embodiments of the application, and are not intended to limit the application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the application shall be included in the protection of the application. within range.

Claims

A method for determining a search space, characterized in that the method comprises:

Determine the target search space in the search space set based on the blind detection times BD count value and the terminal blind detection capability, the BD count value is used when the terminal device performs repeated transmission of the physical downlink control channel PDCCH, and the BD count value is greater than or equal to 2 Integer, the set of search spaces includes an associated search space, and the associated search space is used for repeated transmission of the PDCCH.
The method according to claim 1, wherein the associated search space is the i-th search space and the j-th search space in the set of search spaces, and i and j are positive integers;

The search space identifiers of the i-th search space and the j-th search space are continuous, or the search space identifiers of the i-th search space and the j-th search space are discontinuous.
The method according to claim 2, wherein the BD count value is n;

The determination of the target search space in the search space set based on the BD count value and the terminal blind detection capability includes:

Determine that the first BD count value corresponding to the i search space is m, the second BD count value corresponding to the j search space is n-m, and m is a positive integer less than n;

determining the target search space in the set of search spaces based on the first BD count value, the second BD count value, and the blind detection capability of the terminal.
The method according to claim 3, characterized in that,

The BD count value is 2, the first BD count value is 1, and the second BD count value is 1;

The BD count value is 3, the first BD count value is 1, and the second BD count value is 2.
The method according to claim 4, wherein the search space identifier of the i-th search space is smaller than the search space identifier of the j-th search space.
The method according to claim 3, wherein the target search space in the set of search spaces is determined based on the first BD count value, the second BD count value and the blind detection capability of the terminal ,include:

Determine the number of candidate PDCCHs in each search space in the search space set, and the number of non-overlapping control channel elements CCEs in each search space;

Determine the target search space in the set of search spaces based on the number of candidate PDCCHs, the number of non-overlapping CCEs, the first BD count value, the second BD count value, and the blind detection capability of the terminal.
The method according to claim 6, wherein the method is based on the number of candidate PDCCHs, the number of non-overlapping CCEs, the first BD count value, the second BD count value, and the terminal blind detection Ability to determine said target search space in said set of search spaces, comprising:

According to the ascending order of the search space identification, based on the number of candidate PDCCHs, the first BD count value and the second BD count value, determine the pth detection number, the pth detection number is the candidate in the first p search spaces The total number of detection times of the PDCCH, the first p search spaces perform PDCCH transmission in the same time unit, and p is a positive integer;

According to the ascending order of search space identification, based on the number of non-overlapping CCEs, determine the qth total number of non-overlapping CCEs, the qth total number of non-overlapping CCEs is the total number of non-overlapping CCEs in the first q search spaces, and the first q search The space performs PDCCH transmission in the same time unit, and q is a positive integer;

In response to the p-th detection number being greater than the upper limit of the PDCCH detection number, and the p-1th detection number being less than or equal to the PDCCH detection number upper limit, determining the first p-1 search spaces as the first candidate search space;

In response to the total number of qth non-overlapping CCEs being greater than the upper limit of the number of non-overlapping CCEs, and the total number of q-1th non-overlapping CCEs being less than or equal to the upper limit of the number of non-overlapping CCEs, determining the first q-1 search spaces as the second candidate search space space;

An intersection of the first candidate search space and the second candidate search space is determined as the target search space.
The method according to claim 7, wherein the p-th PDCCH detection is determined based on the number of candidate PDCCHs, the first BD count value, and the second BD count value according to the ascending order of the search space identification Before counting, the method includes:

In response to the fact that there is no candidate PDCCH in the i-th search space and the candidate PDCCH in the k-th search space use the same CCE, scrambling identifier, and downlink control information DCI format, determine that each of the candidate PDCCHs in the associated search space is included In calculating the number of PDCCH detections, the search space identifier of the k-th search space is smaller than the search space identifier of the i-th search space.
The method according to claim 8, characterized in that the method further comprises:

In response to the fact that the target candidate PDCCH in the i-th search space uses the same CCE, scrambling identifier, and DCI format as the candidate PDCCH in the k-th search space, it is determined that the target candidate PDCCH is not included in the calculation of the number of PDCCH detections.
The method according to claim 9, characterized in that the method further comprises:

determining an associated candidate PDCCH associated with the target candidate PDCCH in the jth search space;

In response to the associated candidate PDCCH using the same CCE, scrambling identifier, and DCI format as the candidate PDCCH in the 1st search space, it is determined that the associated candidate PDCCH is not included in the total number of candidate PDCCH blind detection times, and the search of the 1st search space The space identifier is smaller than the search space identifier of the jth search space;

In response to the fact that there is no candidate PDCCH that uses the same CCE, scrambling identifier, and DCI format as the associated candidate PDCCH in the first search space, determine that the associated candidate PDCCH is included in the calculation of the number of PDCCH detections, and the associated candidate PDCCH The BD count value is 1.
The method according to claim 2, wherein the target search space includes the associated search space at the same time, or does not include the associated search space at the same time;

The determination of the target search space in the search space set based on the BD count value and the terminal blind detection capability includes:

Determine the number of candidate PDCCHs in each search space in the search space set, and the number of non-overlapping CCEs in each search space;

Determine the target search space in the search space set based on the number of candidate PDCCHs, the number of non-overlapping CCEs, the BD count value, and the blind detection capability of the terminal.
The method according to claim 11, characterized in that, based on the number of candidate PDCCHs, the number of non-overlapping CCEs, the BD count value, and the blind detection capability of the terminal, determining all of the search space sets The target search space is described, including:

According to the descending order of the priority of the search space, based on the number of candidate PDCCHs and the BD count value, determine the xth detection number, the xth detection number is the total number of detections of the candidate PDCCHs in the search space corresponding to the previous x priorities, The search spaces corresponding to the first x priorities perform PDCCH transmission in the same time unit, and the search spaces corresponding to the first x priorities include the associated search space at the same time, or do not include the associated search space at the same time, and x is positive integer;

According to the descending order of the priority of the search space, based on the number of non-overlapping CCEs, determine the yth total number of non-overlapping CCEs, the yth total number of non-overlapping CCEs is the total number of non-overlapping CCEs in the search space corresponding to the previous y priority, the The search spaces corresponding to the first y priorities perform PDCCH transmission in the same time unit, and the search spaces corresponding to the first y priorities include the associated search space at the same time, or do not include the associated search space at the same time, and y is a positive integer;

In response to the xth detection number being greater than the upper limit of the PDCCH detection number, and the x-1th detection number being less than or equal to the upper limit of the PDCCH detection number, determining the search space corresponding to the first x-1 priority as the first candidate search space;

In response to the fact that the total number of y-th non-overlapping CCEs is greater than the upper limit of the number of non-overlapping CCEs, and the total number of y-1th non-overlapping CCEs is less than or equal to the upper limit of the number of non-overlapping CCEs, the search space corresponding to the first y-1 priorities is determined as a second candidate search space;

An intersection of the first candidate search space and the second candidate search space is determined as the target search space.
The method according to claim 12, wherein the i-th search space has the same priority as the j-th search space;

The priority of the jth search space is set to the priority of the ith search space;

or,

The priority of the i-th search space is set as the priority of the j-th search space.
The method according to claim 12, characterized in that, based on the number of candidate PDCCHs, the number of non-overlapping CCEs, the BD count value, and the blind detection capability of the terminal, determining all of the search space sets Before the target search space, the method also includes:

In response to the fact that there is no candidate PDCCH in the associated search space and the candidate PDCCH in the kth search space uses the same CCE, scrambling identifier, and DCI format, determine that each of the candidate PDCCHs in the associated search space is included in the calculation of the number of PDCCH detections , the search space identifier of the kth search space is smaller than the search space identifier of the associated search space.
The method according to claim 14, characterized in that the method further comprises:

Responding to the existence of a target candidate PDCCH in the associated search space that uses the same CCE, scrambling identifier, and DCI format as the candidate PDCCH in the first search space, determine the target candidate PDCCH and the associated candidate corresponding to the target candidate PDCCH The PDCCH is not included in the calculation of the number of PDCCH detections.
The method according to claim 3, wherein the i-th search space is used for PDCCH transmission in the first time unit, and the j-th search space is used for PDCCH transmission in the second time unit, so The first time unit is different from the second time unit.
The method according to claim 16, wherein the target search space in the set of search spaces is determined based on the first BD count value, the second BD count value and the blind detection capability of the terminal ,include:

Based on the first BD count value and the blind detection capability of the terminal, determine a first target search space corresponding to the first time unit in the search space set;

Based on the second BD count value and the blind detection capability of the terminal, determine a second target search space corresponding to the second time unit in the set of search spaces.
The method according to claim 16, wherein the target search space in the set of search spaces is determined based on the first BD count value, the second BD count value and the blind detection capability of the terminal ,include:

Based on the first BD count value and the blind detection capability of the terminal, determine a first target search space corresponding to the first time unit in the search space set;

Based on the second BD count value, the blind detection capability of the terminal, and the first target search space, determine a second target search space corresponding to the second time unit in the search space set.
The method according to claim 18, wherein the second time in the search space set is determined based on the second BD count value, the blind detection capability of the terminal, and the first target search space The second target search space corresponding to the unit, including:

In response to the i-th search space being included in the first target search space, based on the second BD count value and the blind detection capability of the terminal, determine the search space set corresponding to the second time unit the second target search space;

In response to the i-th search space not being included in the first target search space, updating the second BD count value to 1; based on the updated second BD count value and the blind detection capability of the terminal, Determine the second target search space corresponding to the second time unit in the set of search spaces.
The method according to any one of claims 1 to 19, wherein the associated search spaces correspond to different control resource sets CORESET, and under the same aggregation level, candidate PDCCHs with the same index in the associated search spaces are used for transmission The same DCI is used to invoke the same physical channel.
The method according to any one of claims 1 to 19, wherein the BD count value is reported to the network device when the terminal device performs repeated PDCCH transmission, or the BD count value is a default value, or, the The BD count value is selected and configured by the network device from multiple candidate BD count values reported by the terminal device.
The method according to any one of claims 1 to 19, wherein the associated search space is configured through high-layer signaling or physical layer signaling.
The method according to any one of claims 1 to 19, wherein the terminal blind detection capability includes: an upper limit of the number of PDCCH detections within a time unit, and/or an upper limit of the number of non-overlapping CCEs.
The method according to any one of claims 1 to 19, wherein the method is applied to a terminal device, and the method further includes:

Perform PDCCH blind detection on the target search space.
The method according to any one of claims 1 to 19, wherein the method is applied to a network device, and the method further comprises:

Perform terminal scheduling on the candidate PDCCH in the target search space.
A device for determining a search space, characterized in that the device includes:

A determining module, configured to determine a target search space in the search space set based on the blind detection times BD count value and the terminal blind detection capability, the BD count value is used when the terminal device performs repeated transmission of the physical downlink control channel PDCCH, and the BD count value is an integer greater than or equal to 2, the set of search spaces includes an associated search space, and the associated search space is used for repeated transmission of the PDCCH.
The device according to claim 26, wherein the associated search space is the i-th search space and the j-th search space in the set of search spaces, and i and j are positive integers;

The search space identifiers of the i-th search space and the j-th search space are continuous, or the search space identifiers of the i-th search space and the j-th search space are discontinuous.
The device according to claim 27, wherein the BD count value is n;

The determination module includes:

The first determining unit is configured to determine that the first BD count value corresponding to the i-th search space is m, and the second BD count value corresponding to the j-th search space is n-m, where m is a positive integer less than n;

A second determining unit, configured to determine the target search space in the set of search spaces based on the first BD count value, the second BD count value, and the blind detection capability of the terminal.
The apparatus according to claim 28, characterized in that,

The BD count value is 2, the first BD count value is 1, and the second BD count value is 1;

The BD count value is 3, the first BD count value is 1, and the second BD count value is 2.
The device according to claim 27, wherein the search space identifier of the i-th search space is smaller than the search space identifier of the j-th search space.
The device according to claim 28, wherein the second determining unit is configured to:

Determine the number of candidate PDCCHs in each search space in the search space set, and the number of non-overlapping control channel elements CCEs in each search space;

Determine the target search space in the set of search spaces based on the number of candidate PDCCHs, the number of non-overlapping CCEs, the first BD count value, the second BD count value, and the blind detection capability of the terminal.
The device according to claim 31, wherein the second determination unit is configured to:

According to the ascending order of the search space identification, based on the number of candidate PDCCHs, the first BD count value and the second BD count value, determine the pth detection number, the pth detection number is the candidate in the first p search spaces The total number of detection times of the PDCCH, the first p search spaces perform PDCCH transmission in the same time unit, and p is a positive integer;

According to the ascending order of search space identification, based on the number of non-overlapping CCEs, determine the qth total number of non-overlapping CCEs, the qth total number of non-overlapping CCEs is the total number of non-overlapping CCEs in the first q search spaces, and the first q search The space performs PDCCH transmission in the same time unit, and q is a positive integer;

In response to the p-th detection number being greater than the upper limit of the PDCCH detection number, and the p-1th detection number being less than or equal to the PDCCH detection number upper limit, determining the first p-1 search spaces as the first candidate search space;

In response to the total number of qth non-overlapping CCEs being greater than the upper limit of the number of non-overlapping CCEs, and the total number of q-1th non-overlapping CCEs being less than or equal to the upper limit of the number of non-overlapping CCEs, determining the first q-1 search spaces as the second candidate search space space;

An intersection of the first candidate search space and the second candidate search space is determined as the target search space.
The device according to claim 32, wherein the determining module further comprises:

The third determining unit is configured to determine that in the associated search space, there is no candidate PDCCH in the i-th search space that uses the same CCE, scrambling identifier, and downlink control information DCI format as the candidate PDCCH in the k-th search space. Each of the candidate PDCCHs is included in the calculation of the number of PDCCH detections, and the search space identifier of the k-th search space is smaller than the search space identifier of the i-th search space.
The device according to claim 33, wherein the determining module further comprises:

The fourth determining unit is configured to determine that the target candidate PDCCH is not included in response to the fact that the target candidate PDCCH in the i-th search space uses the same CCE, scrambling identifier, and DCI format as the candidate PDCCH in the k-th search space PDCCH detection count calculation.
The device according to claim 34, wherein the determining module further comprises:

A fifth determining unit, configured to determine an associated candidate PDCCH associated with the target candidate PDCCH in the jth search space;

The sixth determining unit is configured to determine that the associated candidate PDCCH is not included in the total number of candidate PDCCH blind detection times in response to the associated candidate PDCCH using the same CCE, scrambling identifier, and DCI format as the candidate PDCCH in the first search space, The search space identifier of the lth search space is smaller than the search space identifier of the jth search space;

The seventh determination unit is configured to determine that the associated candidate PDCCH is included in the calculation of the number of PDCCH detections in response to the fact that there is no candidate PDCCH using the same CCE, scrambling identifier, and DCI format as the associated candidate PDCCH in the first search space, And the BD count value of the associated candidate PDCCH is 1.
The device according to claim 27, wherein the target search space includes the associated search space at the same time, or does not include the associated search space at the same time;

The determination module includes:

An eighth determining unit, configured to determine the number of candidate PDCCHs in each search space in the search space set, and the number of non-overlapping CCEs in each search space;

A ninth determining unit, configured to determine the target search space in the set of search spaces based on the number of candidate PDCCHs, the number of non-overlapping CCEs, the BD count value, and the blind detection capability of the terminal.
The device according to claim 36, wherein the ninth determining unit is configured to:

According to the descending order of the priority of the search space, based on the number of candidate PDCCHs and the BD count value, determine the xth detection number, the xth detection number is the total number of detections of the candidate PDCCHs in the search space corresponding to the previous x priorities, The search spaces corresponding to the first x priorities perform PDCCH transmission in the same time unit, and the search spaces corresponding to the first x priorities include the associated search space at the same time, or do not include the associated search space at the same time, and x is positive integer;

According to the descending order of the priority of the search space, based on the number of non-overlapping CCEs, determine the yth total number of non-overlapping CCEs, the yth total number of non-overlapping CCEs is the total number of non-overlapping CCEs in the search space corresponding to the previous y priority, the The search spaces corresponding to the first y priorities perform PDCCH transmission in the same time unit, and the search spaces corresponding to the first y priorities include the associated search space at the same time, or do not include the associated search space at the same time, and y is a positive integer;

In response to the xth detection number being greater than the upper limit of the PDCCH detection number, and the x-1th detection number being less than or equal to the upper limit of the PDCCH detection number, determining the search space corresponding to the first x-1 priority as the first candidate search space;

In response to the fact that the total number of y-th non-overlapping CCEs is greater than the upper limit of the number of non-overlapping CCEs, and the total number of y-1th non-overlapping CCEs is less than or equal to the upper limit of the number of non-overlapping CCEs, the search space corresponding to the first y-1 priorities is determined as a second candidate search space;

An intersection of the first candidate search space and the second candidate search space is determined as the target search space.
The device according to claim 37, wherein the i-th search space has the same priority as the j-th search space;

The priority of the jth search space is set to the priority of the ith search space;

or,

The priority of the i-th search space is set as the priority of the j-th search space.
The device according to claim 37, wherein the determining module further comprises:

The tenth determining unit is configured to determine each of the associated search spaces in response to the fact that there is no candidate PDCCH in the associated search space that uses the same CCE, scrambling identifier, and DCI format as the candidate PDCCH in the kth search space. The candidate PDCCH is included in the calculation of the number of PDCCH detections, and the search space identifier of the k-th search space is smaller than the search space identifier of the associated search space.
The device according to claim 39, wherein the determining unit further comprises:

An eleventh determining unit, configured to determine the target candidate PDCCH and the target candidate PDCCH in response to the existence of the target candidate PDCCH in the associated search space using the same CCE, scrambling identifier, and DCI format as the candidate PDCCH in the first search space The associated candidate PDCCH corresponding to the target candidate PDCCH is not included in the calculation of the number of PDCCH detections.
The device according to claim 28, wherein the i-th search space is used for PDCCH transmission in the first time unit, and the j-th search space is used for PDCCH transmission in the second time unit, so The first time unit is different from the second time unit.
The device according to claim 41, wherein the second determination unit is configured to:

Based on the first BD count value and the blind detection capability of the terminal, determine a first target search space corresponding to the first time unit in the search space set;

Based on the second BD count value and the blind detection capability of the terminal, determine a second target search space corresponding to the second time unit in the set of search spaces.
The device according to claim 41, wherein the second determination unit is configured to:

Based on the first BD count value and the blind detection capability of the terminal, determine a first target search space corresponding to the first time unit in the search space set;

Based on the second BD count value, the blind detection capability of the terminal, and the first target search space, determine a second target search space corresponding to the second time unit in the search space set.
The device according to claim 43, wherein the second determining unit is configured to:

In response to the i-th search space being included in the first target search space, based on the second BD count value and the blind detection capability of the terminal, determine the search space set corresponding to the second time unit the second target search space;

In response to the i-th search space not being included in the first target search space, updating the second BD count value to 1; based on the updated second BD count value and the blind detection capability of the terminal, Determine the second target search space corresponding to the second time unit in the set of search spaces.
The device according to any one of claims 26 to 44, wherein the associated search spaces respectively correspond to different control resource sets CORESET, and under the same aggregation level, candidate PDCCHs with the same index in the associated search spaces are used for transmission The same DCI is used to invoke the same physical channel.
The device according to any one of claims 26 to 44, wherein the BD count value is reported to the network device when the terminal device performs repeated PDCCH transmission, or the BD count value is a default value, or, the The BD count value is selected and configured by the network device from multiple candidate BD count values reported by the terminal device.
The device according to any one of claims 26 to 44, wherein the associated search space is configured through high-layer signaling or physical layer signaling.
The device according to any one of claims 26 to 44, wherein the terminal blind detection capability includes: an upper limit of the number of PDCCH detections within a time unit, and/or an upper limit of the number of non-overlapping CCEs.
The device according to any one of claims 26 to 44, wherein the device further comprises:

A blind detection module, configured to perform PDCCH blind detection on the target search space.
The device according to any one of claims 26 to 44, wherein the device further comprises:

A scheduling module, configured to perform terminal scheduling on the candidate PDCCH in the target search space.
A terminal device, characterized in that the terminal device includes a processor and a transceiver;

The processor is configured to determine the target search space in the search space set based on the blind detection times BD count value and the blind detection capability of the terminal, the BD count value is used when the terminal device performs repeated transmission of the physical downlink control channel PDCCH, and the BD The count value is an integer greater than or equal to 2, the set of search spaces includes an associated search space, and the associated search space is used for repeated transmission of the PDCCH.
A network device, characterized in that the network device includes a processor and a transceiver;

The processor is configured to determine the target search space in the search space set based on the blind detection times BD count value and the blind detection capability of the terminal, the BD count value is used when the terminal device performs repeated transmission of the physical downlink control channel PDCCH, and the BD The count value is an integer greater than or equal to 2, the set of search spaces includes an associated search space, and the associated search space is used for repeated transmission of the PDCCH.
A computer-readable storage medium, wherein a computer program is stored in the storage medium, and the computer program is used to be executed by a processor to realize the search space according to any one of claims 1 to 25. Determine the method.
A chip, characterized in that the chip includes programmable logic circuits and/or program instructions, which are used to implement the method for determining the search space according to any one of claims 1 to 25 when the chip is running.
A computer program product or computer program, characterized in that the computer program product or computer program includes computer instructions, the computer instructions are stored in a computer-readable storage medium, and the processor reads the computer-readable storage medium from the computer-readable storage medium And execute the computer instructions to realize the method for determining the search space according to any one of claims 1 to 25.