CN111385892A

CN111385892A - DCI detection method and device

Info

Publication number: CN111385892A
Application number: CN201811647787.5A
Authority: CN
Inventors: 杭海存; 葛士斌; 王潇涵; 纪刘榴
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2018-12-29
Filing date: 2018-12-29
Publication date: 2020-07-07
Anticipated expiration: 2038-12-29
Also published as: CN111385892B; WO2020135444A1

Abstract

The embodiment of the application discloses a DCI detection method and a DCI detection device, and relates to the technical field of communication. The method is applied to the terminal and comprises the following steps: receiving N pieces of configuration information, wherein each piece of configuration information is used for configuring at least one search space set, and each search space set comprises at least one search space; n is not less than 2 and is an integer; and determining to perform DCI blind detection in the search space configured by the N pieces of configuration information according to the N pieces of configuration information. The method can be applied to the scene of cooperative transmission.

Description

DCI detection method and device

Technical Field

The present application relates to the field of communications technologies, and in particular, to a method and an apparatus for detecting Downlink Control Information (DCI).

Background

A coordinated multiple point transmission/reception (CoMP) technique refers to that multiple transmission points (TRPs) separated at geographic locations cooperate to participate in data transmission of one terminal or jointly receive data sent by one terminal. CoMP techniques can improve system performance, especially the spectral efficiency at the cell edge.

In the CoMP technology, non-ideal backhaul (NIB) exists between multiple TRPs (i.e., multiple TRPs serving the same terminal) that cooperatively participate in data transmission of one terminal or jointly receive data transmitted by one terminal, so that real-time information interaction cannot be performed between the multiple TRPs. The DCI is issued in real time, and in order to improve the performance of the system, the plurality of TRPs are allowed to issue a plurality of DCIs in one timeslot in a New Radio (NR) of a fifth generation (5th generation, 5G) mobile communication system. However, in a scenario of "multiple TRPs issue multiple DCIs in one timeslot", how a terminal performs DCI blind detection is not currently provided with a relevant solution.

Disclosure of Invention

The embodiment of the application provides a DCI detection method and a DCI detection device, and particularly provides a method and a device for a terminal to execute DCI blind detection in a cooperative transmission scene, such as a plurality of TRPs issuing a plurality of DCI scenes in one time slot. For example, the scenario of cooperative transmission may be a scenario of a multi-station service terminal or a scenario of cooperative transmission of multiple antenna panels in a single station.

In a first aspect, an embodiment of the present application provides a DCI detection method, which is applied to a terminal, and the method includes: receiving N pieces of configuration information, wherein each piece of configuration information is used for configuring at least one search space set, and each search space set comprises at least one search space; n is not less than 2 and is an integer; and determining to perform DCI blind detection in the search space configured by the N pieces of configuration information according to the N pieces of configuration information. That is, when receiving a plurality of pieces of configuration information, the terminal may perform DCI blind detection in the search spaces configured by all pieces of configuration information. In this way, the problem of high DCI discarding rate caused by DCI blind detection performed on a search space configured by a part of configuration information and DCI blind detection not performed on search spaces configured by other configuration information due to the limitation of the processing capability of the terminal, specifically, the limitation of the maximum blind detection times of the terminal and/or the limitation of the number of non-overlapping CCEs of the terminal, is beneficially avoided; thereby contributing to improved overall system performance.

In one possible design, the N pieces of configuration information may be configuration information sent by some or all network devices (such as TRPs) that cooperatively participate in data transmission of one terminal or jointly receive data sent by one terminal. Optionally, the DCI corresponding to the search space set configured by the N pieces of configuration information is DCI transmitted in the same transmission time interval, for example, a time slot. It should be noted that, for convenience of description, in some embodiments of the present application, DCI corresponding to a search space set configured by configuration information is described as DCI configured by the configuration information, which is herein collectively described and is not described again below.

It should be noted that the "network device" referred to in the embodiments of the present application may be a TRP, a base station network device, a relay station, an access point, or the like, or may be an antenna panel in the TRP, the base station network device, the relay station, the access point, or the like.

In one possible design, the configuration information is Radio Resource Control (RRC) signaling. Of course, the embodiments of the present application are not limited thereto.

In one possible design, the configuration information may be a PDCCH configuration (PDCCH-Config), where the PDCCH is an english abbreviation of a physical downlink control channel (physical downlink control channel). As another example, the configuration information may be a control resource set group configuration, a search space set group configuration, or a DCI scrambling code configuration. As another example, the configuration information may be a cell configuration or a cell group configuration. For the description of these configurations, reference may be made to the following detailed description, which is not repeated here.

In one possible design, the method may further include: and performing DCI blind detection in the search space configured by the N pieces of configuration information according to the maximum blind detection times of the terminal and the maximum number of the CCEs (control channel elements) of the terminal.

In one possible design, for the same subcarrier spacing, the maximum number of blind detections for a terminal in the scenario of a multi-station serving terminal is greater than or equal to the maximum number of blind detections for a terminal in the scenario of a single-station serving terminal. Similarly, for the same subcarrier spacing, the maximum number of non-overlapping CCEs of the terminal in the scenario of the multi-station service terminal is greater than or equal to the maximum number of non-overlapping CCEs of the terminal in the scenario of the single-station service terminal.

In one possible design, the DCI blind detection in the search space configured by the N pieces of configuration information according to the maximum blind detection times of the terminal and the maximum number of non-overlapping CCEs of the terminal includes: determining the maximum blind test times and the maximum non-overlapping CCE number corresponding to each configuration information according to the maximum blind test times of the terminal, the maximum non-overlapping CCE number of the terminal and the value of N; and for each configuration information, performing DCI blind detection in the search space configured by the configuration information based on the maximum blind detection times and the maximum number of non-overlapping CCEs corresponding to the configuration information. Therefore, the terminal can perform DCI blind detection in the search space configured by each configuration information, the problem of high DCI discarding rate can be solved, and the overall performance of the system can be improved.

In a possible design, the search space sets configured by the N pieces of configuration information include a first search space set and a second search space set, and the first search space set and the second search space set are search space sets configured by different pieces of configuration information; according to the maximum blind detection times of the terminal and the maximum number of non-overlapping CCEs of the terminal, DCI blind detection is carried out in the search space configured by the N pieces of configuration information, and the method comprises the following steps: according to the number of the remaining blind tests of the terminal and the number of the remaining non-overlapping CCEs of the terminal, performing DCI blind test in a search space included in the first search space set; the number of the remaining blind tests of the terminal is determined based on the maximum number of the blind tests of the terminal, and the number of the remaining non-overlapping CCEs of the terminal is determined based on the maximum number of the non-overlapping CCEs of the terminal; after DCI blind detection is completed in a search space included in the first search space set, updating the number of the remaining blind detection times of the terminal and the number of the remaining non-overlapping CCEs of the terminal; and performing DCI blind detection in the search space included in the second search space set according to the updated residual blind detection times of the terminal and the residual non-overlapping CCE number of the terminal. That is to say, the embodiment of the present application supports a technical scheme that two adjacent search space sets targeted by a terminal in a DCI blind detection process are search space sets configured by different configuration information, which is beneficial to implementing DCI blind detection in a search space configured by each configuration information of the terminal, thereby being beneficial to solving a problem of high DCI discarding rate and further improving overall performance of a system.

In one possible design, the N pieces of configuration information include first configuration information, and the first configuration information is any one of the N pieces of configuration information. The method may further comprise: and if the DCI blind detection is finished in the search space configured by the first configuration information, stopping the DCI blind detection in the search space configured by the first configuration information.

In one possible design, the DCI blind detection is performed in a search space configured by the first configuration information, and the DCI blind detection includes: DCI blind detection is carried out on the search spaces configured by the first configuration information; or, the DCI is detected in the search space configured by the first configuration information; or, there are no remaining blind detection times or remaining number of non-overlapping CCEs for the first configuration information.

In a possible design, the N pieces of configuration information include first configuration information and second configuration information, and the method may further include: after DCI blind test is completed in the search space configured by the first configuration information, if the search space configured by the first configuration information has remaining blind test times and/or remaining number of non-overlapping CCEs, the maximum blind test times and/or the maximum number of non-overlapping CCEs corresponding to the second configuration information are updated (specifically, the maximum blind test times corresponding to the second configuration information are updated according to the remaining blind test times of the search space configured by the first configuration information, and the maximum number of non-overlapping CCEs corresponding to the second configuration information are updated according to the remaining number of non-overlapping CCEs of the search space configured by the first configuration information). In this case, for each piece of configuration information, performing DCI blind detection in the search space configured by the configuration information based on the maximum blind detection number and the maximum number of non-overlapping CCEs corresponding to the configuration information may include: and performing DCI blind detection in the search space configured by the second configuration information according to the maximum blind detection times and/or the maximum number of non-overlapping CCEs corresponding to the updated second configuration information. In this way, more DCI blind detection opportunities are provided for the search space configured by the second configuration information, so that the utilization rate of the blind detection times of the terminal can be improved.

In a possible design, the N pieces of configuration information include target configuration information, and the target configuration information may be any one of the N pieces of configuration information, or may be a specific one of the N pieces of configuration information. One or more target configuration information may be included in the N configuration information. Based on this, according to the maximum blind detection times of the terminal and the maximum number of non-overlapping CCEs of the terminal, the DCI blind detection is performed in the search space configured by the N configuration information, including: according to the maximum blind detection times of the terminal, the maximum number of non-overlapping CCEs of the terminal and a target aggregation level, performing DCI blind detection in a search space included in a search space set configured by target configuration information, wherein the target aggregation level is greater than or equal to a preset threshold; or, according to the maximum blind detection times of the terminal, the maximum number of non-overlapping CCEs of the terminal and the target DCI format, performing DCI blind detection in a search space included in a search space set configured by the target configuration information; or, according to the maximum blind detection times of the terminal, the maximum number of non-overlapping CCEs of the terminal and the target time domain symbol, performing DCI blind detection in a search space included in a search space set configured by the target configuration information. Where the target aggregation level may be considered a particular aggregation level or levels. The target DCI format may be considered a specific DCI format or formats. The target time domain symbol may be considered a particular one or more time domain symbols. That is to say, the embodiments of the present application support that when DCI blind tests are performed in a search space configured by target configuration information, some limiting conditions are added, which is helpful for reducing the number of blind tests occupied by the search space configured by the target configuration information, so that search spaces configured by other configuration information can obtain more DCI blind test opportunities, and further, the utilization rate of the number of blind tests of the terminal is improved.

In a second aspect, an embodiment of the present application provides a DCI detection apparatus, where the apparatus is configured to perform the method provided in the first aspect or any one of the possible designs of the first aspect. The device may be a terminal or a chip.

In one possible design, the DCI detecting apparatus may be configured to perform functional block division according to the method provided in any one of the above-mentioned first aspect and the first aspect, for example, each functional block may be divided according to each function, or two or more functions may be integrated into one processing block.

In another possible design, the apparatus includes a processor and a transceiver. The transceiver may be configured to receive N pieces of configuration information, each piece of configuration information being used to configure at least one search space set, each search space set including at least one search space; n is not less than 2, and N is an integer. The processor is configured to determine to perform DCI blind detection in the search spaces configured by the N pieces of configuration information according to the N pieces of configuration information. In addition, other steps executed by the processor may refer to technical solutions provided by the possible designs of the first aspect, and are not described herein again.

In a third aspect, an embodiment of the present application provides a DCI detection apparatus, which includes a memory and a processor, where the memory is used to store a computer program, and the computer program, when executed by the processor, causes the method provided in the first aspect or any one of the possible designs of the first aspect to be performed. The device may be a terminal or a chip, for example.

In a fourth aspect, the present application provides a processor configured to perform the method provided in the first aspect or any one of the possible designs of the first aspect. For example, the processor is used for inputting N pieces of configuration information, each piece of configuration information is used for configuring at least one search space set, each search space set comprises at least one search space, N is more than or equal to 2, and N is an integer; and determining to perform DCI blind detection in the search space configured by the N pieces of configuration information according to the N pieces of configuration information. In addition, other steps executed by the processor may refer to technical solutions provided by the possible designs of the first aspect, and are not described herein again.

In a fifth aspect, an embodiment of the present application provides a DCI detection apparatus, where the apparatus includes a processor and a communication interface, where the processor is configured to receive N pieces of configuration information through the communication interface, where each piece of configuration information is used to configure at least one search space set, each search space set includes at least one search space, N ≧ 2, N is an integer; and determining to perform DCI blind detection in the search space configured by the N pieces of configuration information according to the N pieces of configuration information. In addition, other steps executed by the processor may refer to technical solutions provided by the possible designs of the first aspect, and are not described herein again.

In a sixth aspect, an embodiment of the present application provides a DCI detection apparatus, where the apparatus includes a processing circuit and an input interface, where the processing circuit is configured to receive N pieces of configuration information through the input interface, each piece of configuration information is used to configure at least one search space set, each search space set includes at least one search space, N ≧ 2, N is an integer; and determining to perform DCI blind detection in the search space configured by the N pieces of configuration information according to the N pieces of configuration information. In addition, other steps executed by the processing circuit may refer to technical solutions provided by the possible designs of the first aspect, and are not described herein again. Optionally, the apparatus may further include an output interface for outputting information to enable the apparatus to communicate with other devices (e.g., network devices).

In particular implementations, the processor may be configured to perform, for example and without limitation, baseband related processing, and the receiver and transmitter may be configured to perform, for example and without limitation, radio frequency transceiving, respectively. The above devices may be respectively disposed on chips independent from each other, or at least a part or all of the devices may be disposed on the same chip, for example, the receiver and the transmitter may be disposed on a receiver chip and a transmitter chip independent from each other, or may be integrated into a transceiver and then disposed on a transceiver chip. For another example, the processor may be further divided into an analog baseband processor and a digital baseband processor, wherein the analog baseband processor may be integrated with the transceiver on the same chip, and the digital baseband processor may be disposed on a separate chip. With the development of integrated circuit technology, more and more devices can be integrated on the same chip, for example, a digital baseband processor can be integrated on the same chip with various application processors (such as, but not limited to, a graphics processor, a multimedia processor, etc.). Such a chip may be referred to as a system on chip (soc). Whether each device is separately located on a different chip or integrated on one or more chips often depends on the specific needs of the product design. The embodiment of the present application does not limit the specific implementation form of the above device.

Embodiments of the present application further provide a computer-readable storage medium, on which a computer program is stored, which, when running on a computer, causes the computer to perform the method provided by the first aspect or any one of the possible designs of the first aspect. The computer may be a terminal, for example.

Embodiments of the present application also provide a computer program product which, when run on a computer, causes the method provided by the first aspect or any one of the possible designs of the first aspect to be performed.

The present application also provides a communication chip having stored therein instructions that, when run on a terminal, cause the terminal to perform any of the methods provided by the first aspect or any of the possible designs of the first aspect.

It should be understood that any one of the DCI detecting devices, processors, computer readable storage media, computer program products, or communication chips provided above is used to execute the corresponding methods provided above, and therefore, the beneficial effects achieved by the methods can refer to the beneficial effects in the corresponding methods, which are not described herein again.

It should be noted that the above devices for storing computer instructions or computer programs provided in the embodiments of the present application, such as, but not limited to, the above memories, computer readable storage media, communication chips, and the like, are all nonvolatile (non-volatile).

It will be appreciated that some or all of the features of any of the aspects provided above may be combined to form new aspects without significant conflict.

Drawings

Fig. 1 is a schematic diagram of a communication system to which the technical solution provided by the present application is applied;

fig. 2 is a schematic hardware structure diagram of a communication device applicable to an embodiment of the present application;

fig. 3 is an interaction schematic diagram of a DCI detection method provided in an embodiment of the present application;

fig. 4 is a schematic structural diagram of a DCI detection apparatus according to an embodiment of the present application.

Detailed Description

The technical solution provided by the present application can be applied to various communication systems using cooperative transmission technology (such as CoMP technology or CoMP evolution technology), for example, a multipoint cooperative technology, a 5G communication system, a future evolution system or a plurality of communication convergence systems, etc. are adopted on the basis of the existing communication system. A variety of application scenarios may be included, for example, scenarios such as machine-to-machine (M2M), D2M, macro-micro communication, enhanced mobile internet (eMBB), ultra high reliability and low latency communication (URLLC), and massive internet of things communication (mtc). These scenarios may include, but are not limited to: the communication scene between the terminals, the communication scene between the network equipment and the network equipment, the communication scene between the network equipment and the terminals and the like. The technical scheme provided by the application can also be applied to scenes such as communication between terminals in a 5G communication system or communication between network equipment and the network equipment.

As shown in fig. 1, a communication system applicable to the technical solution provided by the present application may include a plurality of network devices 10 (only 2 are shown) and one or more terminals 20 (only 1 terminal 20 is shown), where at least two network devices 10 cooperate to provide a service for one terminal 20. The same network device 10 may serve different terminals 20, and the network devices 10 serving different terminals 20 may be the same or different.

The network device 10 may be a device or means capable of communicating with the terminal 20. The network device 10 may be a TRP, a base station network device, a relay station or an access point, etc. Alternatively, the network device 10 may be an antenna panel in a TRP, a base station network device, a relay station or access point, or the like. The network device 10 may be a Base Transceiver Station (BTS) in a global system for mobile communications (GSM) or Code Division Multiple Access (CDMA) network, may be an nb (nodeb) in Wideband Code Division Multiple Access (WCDMA), and may be an eNB or enodeb (evolved nodeb) in LTE. The network device 10 may also be a wireless controller in a Cloud Radio Access Network (CRAN) scenario. Network device 10 may also be a network device in a 5G communication system or a network device in a future evolution network; but also wearable devices or vehicle-mounted devices, etc.

The terminal 20 may be a User Equipment (UE), an access terminal, a UE unit, a UE station, a mobile station, a remote terminal, a mobile device, a UE terminal, a wireless communication device, a UE agent, a UE device, or the like. The access terminal may be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with wireless communication capability, a computing device or other processing device connected to a wireless modem, a vehicle mounted device, a wearable device, a terminal in a future 5G network or a terminal in a future evolved PLMN network, etc.

Alternatively, each network element (such as the network device 10 and the terminal 20) in fig. 1 may be implemented by the communication device 200 in fig. 2. Fig. 2 is a schematic hardware structure diagram of a communication device applicable to an embodiment of the present application. The communication device 200 includes at least one processor 201, communication lines 202, memory 203, and at least one communication interface 204.

The processor 201 may be a general processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more ics for controlling the execution of programs in accordance with the present invention.

The communication link 202 may include a path for transmitting information between the aforementioned components.

Communication interface 204 is any transceiver or other device (e.g., an antenna, etc.) for communicating with other devices or communication networks, such as an ethernet, RAN, Wireless Local Area Network (WLAN), etc.

The memory 203 may be a read-only memory (ROM) or other type of static storage device that can store static information and instructions, a Random Access Memory (RAM) or other type of dynamic storage device that can store information and instructions, an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disk storage, optical disk storage (including compact disc, laser disc, optical disc, digital versatile disc, blu-ray disc, etc.), magnetic disk storage media or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, but is not limited to these. The memory may be separate and coupled to the processor via communication line 202. The memory may also be integral to the processor. The memory provided by the embodiment of the application can be generally nonvolatile. The memory 203 is used for storing computer execution instructions for executing the scheme of the application, and is controlled by the processor 201 to execute. The processor 201 is configured to execute computer-executable instructions stored in the memory 203, thereby implementing the methods provided by the embodiments described below.

Optionally, the computer-executable instructions in the embodiments of the present application may also be referred to as application program codes, which are not specifically limited in the embodiments of the present application.

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

In particular implementations, communication device 200 may include multiple processors, such as processor 201 and processor 207 in fig. 2, for example, as an example. Each of these processors may be a single-core (single-CPU) processor or a multi-core (multi-CPU) processor. A processor herein may refer to one or more devices, circuits, and/or processing cores for processing data (e.g., computer program instructions).

In particular implementations, communication device 200 may also include an output device 205 and an input device 206, as one embodiment. The output device 205 is in communication with the processor 201 and may display information in a variety of ways. For example, the output device 205 may be a Liquid Crystal Display (LCD), a Light Emitting Diode (LED) display device, a Cathode Ray Tube (CRT) display device, a projector (projector), or the like. The input device 206 is in communication with the processor 201 and may receive user input in a variety of ways. For example, the input device 206 may be a mouse, a keyboard, a touch screen device, or a sensing device, among others.

The communication device 200 described above may be a general purpose device or a special purpose device. In a specific implementation, the communication device 200 may be a desktop, a laptop, a web server, a Personal Digital Assistant (PDA), a mobile phone, a tablet, a wireless terminal device, an embedded device, or a device with a similar structure as in fig. 2. The embodiment of the present application does not limit the type of the communication device 200.

The terms and related art referred to in this application are briefly introduced below to facilitate the understanding of the reader:

to facilitate understanding of the embodiments of the present application, first, the terms and techniques referred to in the present application will be briefly described.

1) A control resource set (CORESET) and a control resource set group (CORESETgroup)

The control resource set may be a resource set for transmitting DCI, and may also be referred to as a control resource region or a physical downlink control channel resource set.

Each control resource set may be a set of Resource Element Groups (REGs). The REG is a basic unit for physical resource allocation of downlink control signaling, and is used to define mapping from the downlink control signaling to Resource Elements (REs). For example, in the Long Term Evolution (LTE) protocol, one REG consists of 4 REs of consecutive non-Reference Signals (RSs) in the frequency domain. It should be understood that REG is only a unit for resource allocation, and should not constitute any limitation to the present application, and the present application does not exclude the definition of a new resource allocation unit to achieve the same or similar functions in future protocols.

For a network device, a control resource set may be understood as a set of resources that may be used to transmit a PDCCH; for the terminal, the resource corresponding to the search space of the PDCCH of each terminal belongs to the control resource set. Or, the network device may determine, from the set of control resources, resources used for transmitting the PDCCH, and the terminal may determine a search space of the PDCCH according to the set of control resources.

The control resource set may include time-frequency resources, for example, a segment of bandwidth in a frequency domain, or one or more subbands; may be one or more symbols in the time domain; one control resource set may be a continuous or discontinuous resource unit, e.g., a continuous Resource Block (RB) or a discontinuous RB, in the time-frequency domain.

It should be understood that the specific contents of the frequency domain resource, the time domain resource and the time frequency domain resource listed above are only exemplary and should not limit the present application in any way. For example, the RB is an example of a resource unit, and the size of the RB may be a resource defined in the NR protocol, may be a resource defined in a future protocol, or may be replaced with another name. For another example, the control resource set may also be one or more slots (slots), radio frames, subframes, minislots (or sub-slots), or Transmission Time Intervals (TTIs) in the time domain, which is not particularly limited in this embodiment of the present application.

The control resource set may be configured, for example, by a control resource set information element (controlresource information element) in a higher layer parameter. The higher layer parameter may include, for example, an Identifier (ID) of a control resource set, a frequency domain resource, the number of symbols included in a duration (duration), and the like. The present application does not limit the specific parameters for configuring the control resource set.

In addition, the embodiment of the application provides a concept of controlling the resource set group. A control resource set group may include one or more control resource sets. The control resource set included in the control resource set group may be configured, for example, by a higher layer parameter, for example, by a PDCCH configuration information element (PDCCH-configuration element, PDCCH-configuration ie), or by a ControlResourceSet information element, which is not limited in this application.

In one example, in a scenario of a multi-station serving terminal, for eMBB traffic, a network device may configure a terminal with multiple control resource set groups, one control resource set group including at least one control resource set. The control resource sets included in the same control resource set group are control resource sets configured for DCI of the same network device. Of course, for any one control resource set group, the network device may also schedule the URLCC service in the control resource set group, that is, one or more DCIs of the network device for the URLCC service may also be sent in the control resource set group.

2) Search space Set (SS Set) and search space Set group (SS Set group)

The set of search spaces may be a collection of search spaces described from a physical layer perspective. For the higher layers, this set of search spaces may also be referred to as Search Spaces (SS). In the embodiments of the present application, for the sake of convenience of distinction from the search space described below, it is referred to as a search space set in the present application.

The network device may configure the search space set by a high-level parameter, for example, may be configured by a search space information element (SearchSpace information element). The high-level parameters may include, for example, an identifier of a search space set, an identifier of a control resource set, a period and an offset of a monitoring slot, a monitoring symbol in the slot, an Aggregation Level (AL), and the like. The present application does not limit the specific parameters for configuring the search space.

In addition, the embodiment of the application provides a concept of search space set group. A search space set group may include one or more search space sets. The search space set included in the search space set group may be configured by, for example, a higher layer parameter, for example, a PDCCH-configuration information element, or a SearchSpaceinformation element, which is not limited in the present application.

Here, the SearchSpace information element is a high-level parameter, and the high-level parameter may be considered to be used for configuring the search space set in the physical layer. Hereinafter, the search space may be understood as a set of search spaces of the physical layer when it relates to the configuration of the higher layer parameters. For the sake of brevity, the description of the same or similar cases is omitted hereinafter.

In one example, in a scenario of a multi-station serving terminal, for eMBB traffic, a network device may configure a terminal with multiple search space set groups, one search space set group including at least one search space set. The search space sets included in the same search space set group are search space sets configured for DCI of the same network device. Of course, for any search space set group, the network device may also schedule URLCC services in the search space set group; that is, the network device may also be transmitted in the search space set group, scheduling one or more DCIs for URLCC traffic.

3) Control Channel Element (CCE)

CCE is a resource unit of the control channel. The LTE protocol specifies that one CCE consists of 9 REGs. It should be understood that CCE is only a resource unit of the control channel and should not constitute any limitation to the present application, and the present application does not exclude that a new resource unit of the control channel is defined in a future protocol to achieve the same or similar function.

4) Search space

The search space is a search range of the terminal blind test, or a set of candidate downlink control channels that the terminal needs to monitor. The physical resources of the search space may be determined jointly by the set of control resources and the set of search spaces. For example, the set of control resources may indicate a frequency domain location and a duration of a search space, and the set of search spaces may indicate a starting location of the search space in a time domain, such as a starting time slot. In the embodiment of the application, the terminal may determine the time-frequency resource of the blind detection PDCCH based on the control resource set and the search space set configured in the PDCCH configuration.

It should be noted that, for convenience of description, in the embodiment of the present application, a search space determined by the control resource set and the search space set is referred to as a search space in the search space set, and is herein collectively described, and details are not repeated below.

The size of a search space is determined by the Aggregation Level (AL). Generally, if the aggregation level is equal to R, the size of one search space is equal to R a, where a is the size of one CCE. Where R is typically an integer power of 2, e.g., R ═ 1, 2, 4, 8, 16, and the like. Of course, a search space may also be smaller than R a.

That is, for a search space set, when the corresponding (or employed) aggregation levels are different, the number of search spaces determined based on the search space set (or the search spaces included in the search space set) is different. Wherein a set of search spaces may correspond to one or more aggregation levels. The search space set corresponds to several aggregation levels and the value of each aggregation level is predefined, for example, predefined by a protocol, or configured to the terminal by the network device through signaling.

The search space may include a common search space (common search space) and a dedicated search space (specific search space). The common search space refers to a search space in which all terminals in a cell perform monitoring. The dedicated search space is a terminal-granularity search space, and dedicated search spaces of different terminals in the same cell may be different.

5) Cell, cell group

A cell may also be referred to as a serving cell (serving cell). A cell may be understood as being described by a higher layer from the point of view of resource management or mobility management or serving elements. The coverage area of each network device may be divided into one or more serving cells, and the serving cells may be considered to be composed of certain frequency domain resources. In the embodiment of the present application, a cell may be replaced with a serving cell or a carrier component carrier (CC, or referred to as a component carrier, a carrier, or the like). In the present embodiment, "cell", "serving cell", and "CC" are used interchangeably, and the intended meaning thereof is consistent when the distinction thereof is not emphasized.

In a multi-station service terminal scenario, when multiple cells serve the same terminal at the same time, each cell may correspond to a control resource set group or a search space set group. Similarly, in a scenario of a multi-station serving terminal, when multiple cell groups serve the same terminal, each cell group may correspond to one control resource set group or one search space set group.

6) PDCCH configuration (PDCCH configuration)

The network device may configure PDCCH parameters, e.g., control resource sets, control resource set groups (CORESET groups), search space sets, search space set groups (ssgroups), and other parameters that may be used for blind detection of PDCCH, based on each bandwidth part (BWP) in each cell. The PDCCH configuration may be configured, for example, by PDCCH-Config IE in higher layer parameters. The PDCCH-Config IE may include, for example, a control resource set addition status list (control resource set add list) and a control resource set release list (control resource set release list). Each list can include an identification of one or more control resource sets. The PDCCH-Config IE may further include a search space addition status list (searchSpacesToAddModList) and a search space release list (searchSpacesToReleaseList), for example. Each list may include an identification of one or more search spaces.

Optionally, one or more control resource set groups and/or one or more search space set groups may also be indicated in each PDCCH configuration. For example, the control resource set addition status list in the PDCCH-Config IE may include one or more control resource set group identifications and identifications of control resource sets included in each control resource set group. As another example, the search space addition list in the PDCCH-ConfigIE may include one or more search space set group identifications and identifications of search space sets included in each search space set group.

Optionally, one or more DCI scrambling codes may also be indicated in each PDCCH configuration. For example, the control resource set addition status list in PDCCH-ConfigIE may include one or more DCI scrambling code identifiers and an identifier of a search space set corresponding to each DCI scrambling code.

One or more search spaces may be determined by the PDCCH configuration. In this embodiment, for a terminal, PDCCH configuration of a PDCCH may be understood as PDCCH configuration based on which the PDCCH is received, or the terminal blindly detects the PDCCH in a search space determined by the PDCCH configuration; for a network device, the PDCCH configuration of a PDCCH may be understood as a PDCCH configuration on which the PDCCH is transmitted, or the network device may transmit the PDCCH on a part of resources in a search space determined by the PDCCH configuration.

It should be noted that the "blind PDCCH" described in the embodiments of the present application has the same concept as "blind DCI" or "DCI blind detection", and may be used interchangeably. The concepts of "transmitting PDCCH" and "transmitting DCI" described in the embodiments of the present application are the same, and the same concepts of "receiving PDCCH" and "receiving DCI" are the same, and the same concepts are used interchangeably.

7) Number of non-overlapping (CCE) Control Channel Elements (CCEs)

For the same aggregation level, if a search space included in one search space set overlaps with a search space included in another search space set, the two search space sets are considered to overlap, or overlapping CCEs exist in the two search space sets.

For convenience of description, the concept of "number of non-overlapping CCEs of a search space set" is introduced in the embodiments of the present application. As an example, the number of non-overlapping CCEs of a search space set may be understood as the number of effective search spaces included in the search space set. The effective search space included in one search space set refers to a search space included in the search space set and not belonging to other previous search space sets. Optionally, the set of search spaces and the set of other search spaces belong to a same set of search spaces. As an example, the sequence of each search space set in one search space set group is determined according to the sequence of DCI blind detection performed by the terminal in the search spaces included in each search space set, for example, the sequence of each search space set in one search space set group is the sequence of DCI blind detection performed by the terminal in the search spaces included in each search space set.

8) DCI blind detection times required for one search space set

The number of DCI blind tests required by one search space set is the sum of the number of search spaces included in the search space set determined according to each aggregation level of the DCI corresponding to the search space set. For example, assuming that the aggregation levels of DCI corresponding to one search space set are 1, 2, 4, and 8, respectively, the number of DCI blind tests required for the search space set is: and when the aggregation level is respectively equal to 1, 2, 4 and 8, the sum of the numbers of the search spaces included in the search space set is obtained.

9) Other terms

The term "at least one" in the embodiments of the present application includes one or more. "plurality" means two (species) or more than two (species). For example, at least one of A, B and C, comprising: a alone, B alone, a and B in combination, a and C in combination, B and C in combination, and A, B and C in combination. In this application, "/" indicates an OR meaning, e.g., A/B may indicate A or B; "and/or" herein is only one kind of association relationship describing the association object, and means that there may be three kinds of relationships, for example, a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. "plurality" means two or more than two. For the convenience of clearly describing the technical solutions of the embodiments of the present application, the words "first", "second", and the like are used in the embodiments of the present application to distinguish the same items or similar items with basically the same functions and actions. Those skilled in the art will appreciate that the terms "first," "second," etc. do not denote any order or quantity, nor do the terms "first," "second," etc. denote any order or importance.

10) DCI blind detection process in existing 5G NR protocol

In the existing protocol, only one PDCCH configuration is configured in one cell, and therefore, the terminal performs DCI blind detection only in the search space configured by the PDCCH configuration.

From the view of the order of detecting the DCI by the terminal, the terminal preferentially performs DCI blind detection in the common search space, and performs DCI blind detection in the dedicated search space after the DCI blind detection is completed in the common search space.

The procedure of the terminal performing DCI blind detection in the dedicated search space may include the following steps:

step 1: and the terminal subtracts the blind detection times used by the terminal for DCI blind detection in the public search space according to the maximum blind detection times of the terminal to obtain the maximum blind detection times of the special search space of the terminal. And the terminal subtracts the number of the non-overlapping CCEs used for DCI blind detection in the public search space of the terminal according to the maximum number of the non-overlapping CCEs of the terminal to obtain the maximum number of the non-overlapping CCEs of the special search space of the terminal.

Step 2: when the PDCCH configuration includes multiple search space sets, the terminal sorts the multiple dedicated search space sets according to the order of Identity numbers (IDs) of the multiple dedicated search space sets configured by the PDCCH configuration (i.e., the identifiers of the search space sets) from small to large, assuming that there are J dedicated search space sets in total, and the sorted dedicated search space sets are respectively marked as search space sets 0 to J-1.

And step 3: the terminal judges whether the blind detection times required by DCI blind detection in the search space set i exceed the residual maximum blind detection times of the special search space of the terminal and judges whether the number of the non-overlapping CCEs in the search space set i exceeds the residual maximum number of the non-overlapping CCEs in the search space set i according to the number of the search spaces in the search space set i. If the number of the DCI is not more than the preset value, performing DCI blind detection in the search space included in the search space set i, assigning i to be i +1 when i is less than J-1, and returning to execute the step 3. And when the i is J-1, ending the DCI blind detection process. Otherwise, discarding the search space set i, that is, not performing the DCI blind test in the search space included in the search space set i, and ending the DCI blind test process. Wherein the initial value of i is 0, and i is more than or equal to 0 and less than or equal to J-1.

It can be understood that, when the DCI blind detection procedure described above is applied to the CoMP technology, one possible implementation manner is: and (3) uniformly sequencing the search space sets configured by the plurality of configuration information received by the terminal, and performing DCI blind detection according to the mode of the step 3. In this way, due to the limitation of the terminal capability, specifically, the limitation of the maximum blind detection number of the terminal and/or the limitation of the number of non-overlapping CCEs of the terminal, the terminal may perform DCI blind detection on the search space configured by a part of configuration information, and may not perform DCI blind detection on the search space configured by another part of configuration information, thereby causing a problem of high DCI discard rate. This can affect the overall performance of the system.

The technical solutions provided in the embodiments of the present application are described below with reference to the drawings.

Fig. 3 is a schematic diagram of a DCI detection method provided in an embodiment of the present application. The method shown in fig. 3 comprises:

s101: the network device sends the N pieces of configuration information. Each configuration information is used for configuring at least one search space set, and each search space set comprises at least one search space; n is not less than 2, and N is an integer.

S102: the terminal receives the N pieces of configuration information.

The technical scheme provided by the embodiment of the application is applied to a cooperative transmission scene, for example, the cooperative transmission scene can be a multi-station service terminal scene or a multi-antenna panel cooperative transmission scene in a single station. The "network device" in S101 may be a part or all of network devices that cooperatively participate in data transmission of the terminal or jointly receive data transmitted by the terminal.

The number of search spaces configured by different configuration information may be the same or different. Generally, search space sets configured by different configuration information do not overlap, although the embodiment of the present application is not limited thereto. Optionally, the configuration information may be carried through RRC signaling. In a specific implementation, the terminal may not perceive which network device sent the N pieces of configuration information.

Optionally, the configuration information may be a PDCCH configuration. Reference may be made to the above regarding the description of the PDCCH configuration. For example, the N pieces of configuration information may specifically be N pieces of PDCCH configurations (i.e., PDCCH configurations). In this optional implementation, the terminal needs to distinguish the IDs of PDCCH configurations, where an ID of a PDCCH configuration corresponds to at least one search space set.

Optionally, the configuration information may be a control resource set group configuration. The control resource set group configuration is information for configuring a correspondence relationship between a control resource set group and a control resource set. Since there is a correspondence between the control resource sets and the search space sets, the control resource set configuration can be indirectly used to configure the correspondence between the control resource set groups and the search space sets. One control resource set configuration may be understood as one indication information in a PDCCH configuration, which may carry one or more control resource set configurations. For example, the N pieces of configuration information may be N pieces of control resource set configurations, and the N pieces of control resource set configurations may be carried in one or more PDCCH configurations and sent by the network device to the terminal.

Alternatively, the configuration information may be a search space set group configuration. The search space set group configuration is information for configuring the correspondence between the search space set group and the search space set. A search space set configuration may be understood as an indication of the PDCCH configuration, which may carry one or more search space set configurations. For example, the N configuration information may be N search space set configurations, and the N control resource set configurations are carried in one or more PDCCH configurations and sent by the network device to the terminal.

Optionally, the configuration information may be a cell configuration. The cell configuration is information for configuring a correspondence relationship between a cell and a search space set. This alternative may be applicable in scenarios where multiple cells, in particular network devices in multiple cells, serve the same terminal. In this alternative implementation, the terminal needs to distinguish the cell IDs, thereby indirectly distinguishing the different PDCCH configurations. Based on the optional implementation manner, in combination with one technical solution provided below, when multiple cells simultaneously provide services for a terminal, the terminal may allocate, after DCI blind detection is completed for one of the cells, the remaining number of blind detections and/or the remaining number of non-overlapping CCEs corresponding to the cell to other cells.

Optionally, the configuration information may be a cell group configuration. The cell group configuration is used for configuring information of correspondence between the cell group and the cells. Since the cell configuration may be used to configure the correspondence between the cell and the search space set, the cell group configuration may be indirectly used to configure the correspondence between the cell group and the search space set. This alternative may be applicable in scenarios where multiple cell groups, in particular network devices in multiple cell groups, serve the same terminal. In this alternative implementation, the terminal needs to distinguish the IDs of the cell groups, thereby indirectly distinguishing the different PDCCH configurations. Based on this optional implementation manner, in combination with one technical solution provided below, when a plurality of cell groups simultaneously provide services for a terminal, the terminal may allocate, after DCI blind detection is completed for one of the cell groups, the remaining number of blind detections and/or the remaining number of non-overlapping CCEs corresponding to the cell group to another cell group.

Optionally, the configuration information may be DCI scrambling code configuration. The DCI scrambling code configuration is information for configuring a correspondence relationship between the DCI scrambling code and the search space set. It is to be understood that the DCI scrambling code configuration may be understood as indication information in a PDCCH configuration, and one PDCCH configuration may carry one or more DCI scrambling code configurations.

In a specific implementation, the configuration information is specifically which of the above configurations, and may be predefined, for example, predefined by a protocol; or the network device may be configured to the terminal through signaling. This is not limited in the embodiments of the present application.

S103: and the terminal determines to perform DCI blind detection in the search space configured by the N configuration information according to the N configuration information. For example, the terminal performs DCI blind detection in the search spaces configured by all the received configuration information. For each configuration information, the terminal may perform DCI blind detection in part or all of the search spaces configured by the configuration information.

In the DCI detection method provided in the embodiment of the present application, the terminal may perform DCI blind detection in search spaces configured by all configuration information when receiving a plurality of configuration information. In this way, the problem of high DCI discarding rate caused by DCI blind detection performed on a search space configured by a part of configuration information and DCI blind detection not performed on search spaces configured by other configuration information due to the limitation of the processing capability of the terminal, specifically, the limitation of the maximum blind detection times of the terminal and/or the limitation of the number of non-overlapping CCEs of the terminal, is beneficially avoided; thereby contributing to improved overall system performance.

Optionally, the method may further include the following step S104:

s104: and the terminal performs DCI blind detection in the search space configured by the N pieces of configuration information according to the maximum blind detection times of the terminal and the maximum number of non-overlapping CCEs of the terminal.

In one implementation, the maximum number of blind detections and the maximum number of non-overlapping CCEs of the terminal described in the embodiment of the present application may both be determined based on the subcarrier spacing.

For example, in the current 5G NR protocol, when the subcarrier spacing is 15kHz, the maximum number of blind detections for the terminal is 44, and the maximum number of non-overlapping CCEs for the terminal is 56. It should be understood that this example is presented on a single station serving terminal basis. Based on the method, the maximum blind detection times of the terminal in the scene of the multi-station service terminal are larger than or equal to the maximum blind detection times of the terminal in the scene of the single-station service terminal for the same subcarrier interval in an extensible mode. Similarly, for the same subcarrier spacing, the maximum number of non-overlapping CCEs of the terminal in the scenario of the multi-station service terminal is greater than or equal to the maximum number of non-overlapping CCEs of the terminal in the scenario of the single-station service terminal.

It should be noted that, if not described, the maximum blind detection times and the maximum number of non-overlapping CCEs described in this application are described based on a slot-cell example, and are described in a unified manner here, and are not described again below.

In another implementation manner, the maximum blind detection times of the terminal described in the embodiments of the present application may refer to the maximum blind detection times of the dedicated search space for the terminal. Similarly, the maximum number of non-overlapping CCEs of the terminal described in the embodiment of the present application may be the maximum number of non-overlapping CCEs of the dedicated search space of the pointer for the terminal.

Optionally, the N pieces of configuration information include target configuration information, and the target configuration information may be any one of the N pieces of configuration information, or may be a specific one of the N pieces of configuration information. The N configuration information may include one or more target configuration information. Based on this, S104 can be implemented by one of the following schemes:

scheme 1: and according to the maximum blind detection times of the terminal, the maximum number of non-overlapping CCEs of the terminal and the target aggregation level, performing DCI blind detection in a search space included in a search space set configured by the target configuration information.

Optionally, the target aggregation level is greater than or equal to a preset threshold.

It can be understood that in a scenario of a multi-station serving terminal, a terminal located at a cell edge has a poor interference-to-interference plus noise ratio (signal-to-interference plus noise ratio) compared to a terminal located at a cell center, and in order to ensure the robustness of the PDCCH, only a DCI with a relatively high aggregation level is usually adopted in a scenario with a relatively low SINR, i.e., a relatively low channel quality, for example, the aggregation level may be selected to be 8, 16, or 32. Based on this, for a certain configuration information or some configuration information, DCI blind detection can be performed only with a relatively high aggregation level. Therefore, the blind detection times occupied by the search space configured by the configuration information or the configuration information can be reduced, so that the search spaces configured by other configuration information can obtain more DCI blind detection opportunities, and the utilization rate of the blind detection times of the terminal is improved. It should be understood that this is only one specific application scenario of scheme 1, and does not limit the application scenario of scheme 1.

The embodiment of the present application does not limit how the terminal determines whether to perform DCI blind detection on all available aggregation levels or on one or more specific aggregation levels for one configuration information.

For example, the network devices may be classified as primary and secondary network devices, which differ by: the aggregation levels corresponding to the DCI configured by the primary network device for the invoked service are all available aggregation levels, and the aggregation levels corresponding to the DCI configured by the secondary network device for the invoked service are specific aggregation level or levels, such as a relatively high aggregation level. Based on this, the network device and the terminal may negotiate, through protocol predefining or through a signaling configuration, which DCI configured by the configuration information is a DCI for scheduling traffic data of the primary network device, and/or which configuration information is a DCI for scheduling traffic data of the secondary network device. For example, when the configuration information is PDCCH configuration, DCI of all aggregation levels is blind-detected in a search space configured by PDCCH configuration with a small ID, and only DCI of a specific aggregation level is blind-detected in a search space configured by PDCCH configuration information with a large ID. In this way, after the terminal receives the configuration information, it may determine whether all available aggregation levels or a specific aggregation level or levels are required to be adopted for the configuration information based on the identification information of the configuration information.

Scheme 2: and according to the maximum blind detection times of the terminal, the maximum number of non-overlapping CCEs of the terminal and the target DCI format, performing DCI blind detection in a search space included in a search space set configured by the target configuration information.

For the same reason as in the above-described scheme 1, it is understood that only specific DCI formats (formats) may be used for certain configuration information or certain configuration information. For example, DCI format 1_0 and DCI format 1_ 1.

Scheme 3: and according to the maximum blind detection times of the terminal, the maximum number of non-overlapped CCEs of the terminal and the target time domain symbol, performing DCI blind detection in a search space included in a search space set configured by the target configuration information.

It can be understood that in the current protocol, when a terminal is served by a single station, the same network device may transmit a plurality of DCIs in one time slot of a cell. For example, the network device schedules the eMBB service data of the terminal first, and the network device needs to send a DCI for the eMBB service data. At this time, if there are one or more burst packets, such as URLLC traffic data, the network device needs to send one DCI for each burst packet.

DCI for eMBB traffic data is typically carried on the first N time domain symbols of a slot (e.g., N ═ 3), and DCI for URLLC traffic data may be carried on any one time domain symbol of a slot. As an example, the time domain symbol may be an Orthogonal Frequency Division Multiplexing (OFDM) symbol or the like. Therefore, if the network device is divided into the main network device and the auxiliary network device, the main network device may schedule URLLC service data and eMBB service data, and the auxiliary network device may schedule eMBB service data but may not schedule URLCC service data; then, for any configuration information, the terminal may perform DCI blind detection in a specific time domain symbol (e.g., the first 3 time domain symbols) of one slot if it is determined that the DCI configured by the configuration information is traffic data for scheduling the secondary network device. Therefore, the blind detection times occupied by the configuration information can be reduced, so that more DCI blind detection opportunities can be obtained in the search space configured by other configuration information, and the utilization rate of the blind detection times of the terminal is improved.

As an example, the network device and the terminal may negotiate which DCI configured by the configuration information is a DCI for scheduling traffic data of the primary network device and/or which configuration information is a DCI for scheduling traffic data of the secondary network device, predefined by a protocol or configured by signaling. Based on this, after the terminal receives the configuration information, it may determine, based on the identification information of the configuration information, whether to perform DCI blind detection on all time domain symbols of one slot, or to perform DCI blind detection on a specific time domain symbol.

It can be understood that, without conflict, the above at least two schemes may be used in combination to form a new technical scheme, for example, for a certain configuration information or certain configuration information, the terminal may perform DCI blind detection according to a specific aggregation level and a specific time domain symbol.

Optionally, the N pieces of configuration information include first configuration information, and the first configuration information may be any one of the N pieces of configuration information. Based on this, if the DCI blind detection is completed in the search space configured by the first configuration information, the DCI blind detection in the search space configured by the first configuration information is stopped. The DCI blind detection is completed in the search space configured by the first configuration information, and may include any one of the following modes a to c. In other words, when the first configuration information satisfies any one of the following manners a to c, it is considered that the DCI blind detection is completed in the search space configured by the first configuration information.

The method a: the search spaces configured by the first configuration information are all subjected to DCI blind detection. Here, the search space refers to an effective search space configured by the first configuration information.

Mode b: the DCI is detected in the search space configured by the first configuration information. That is to say, the embodiment of the present application supports a technical solution that, for one piece of configuration information, after one piece of DCI is detected in the configured search space, the DCI blind detection for the search space configured by the configuration information is stopped.

As an example, the application scenario of the mode b may include the following:

application scenario 1: if the primary and secondary network devices are distinguished as described in the above scheme 3, then only one DCI is transmitted in one slot for the secondary network devices, and therefore, for the configuration information configuring the DCI, the terminal may stop DCI blind detection for the search space configured by the configuration information after detecting one DCI.

Application scenario 2: the DCI may be classified as primary and secondary DCI. It can be understood that in a scenario of a multi-station service terminal, some information in DCI sent to the terminal by different network devices is the same, and the change is slow; another part of the information in the plurality of DCIs is different. In the embodiment of the present application, the same information may be sent by the main DCI, and the main DCI does not need to be sent in each slot, and even more does not need to be sent by multiple network devices; the other information is transmitted by the secondary DCI. Based on this, from the perspective of the terminal, there may be only one main DCI in a specific time slot, and therefore, for the configuration information configuring the main DCI, the terminal may stop blind detection of the main DCI for the search space configured by the configuration information after detecting one main DCI. It should be noted that in this scenario, there may be a case where the DCI configured by one piece of configuration information includes a main DCI and an auxiliary DCI.

Application scenario 3: if a terminal is served by multiple cells simultaneously, the cells can be divided into primary and secondary cells, wherein the primary and secondary cells are distinguished as follows: the network equipment in the primary cell can schedule eMB service and URLLC service, and the network equipment in the secondary cell can schedule eMB service but not URLLC service. Based on this, for the configuration information received in the secondary cell, after detecting one DCI, the terminal may stop DCI blind detection for the search space configured by the configuration information. The "cell" in the application scenario 3 may be replaced by a "cell group" to form a new application scenario.

It can be understood that the application scenarios 1 to 3 are explained based on the application of the technical solution provided in the embodiment of the present application to a multi-station service terminal, and in a specific implementation, the "network device" in the application scenarios 1 to 3 is replaced by an "antenna panel", so that the technical solution of the technical solution provided in the embodiment of the present application to a single-station multi-panel scenario can be obtained.

Mode c: there is no remaining number of blind tests or remaining number of non-overlapping CCEs for the first configuration information. That is, the number of remaining blind detections for the first configuration information is 0 or the number of remaining non-overlapping CCEs is 0. As for a specific implementation of this mode c, the following can be referred to.

In addition, optionally, for a specific implementation manner in which the DCI blind detection is completed in the search space configured by the first configuration information, reference may be made to the prior art, and details are not described here again.

Optionally, S104 may be implemented by the following mode 1 or mode 2:

mode 1: s104 may include the steps of:

step 1: and determining the maximum blind test times and the maximum non-overlapping CCE number corresponding to each configuration information according to the maximum blind test times of the terminal, the maximum non-overlapping CCE number of the terminal and the value of N.

Specifically, the maximum blind test times of the terminal are divided into N parts, and the nth part is used as the maximum blind test times corresponding to the nth configuration information; similarly, the maximum number of non-overlapping CCEs of the terminal is divided into N parts, and the nth part is taken as the maximum number of non-overlapping CCEs corresponding to the nth configuration information. N is not less than 1 and not more than N, and N is an integer. The maximum blind detection times corresponding to any two pieces of configuration information may be equal or unequal. The maximum number of non-overlapping CCEs corresponding to any two pieces of configuration information may be equal or unequal.

In some embodiments of the present application, if the value of the target parameter cannot be equally divided into N parts, the remainder obtained in the averaging process is distributed to different configuration information. The target parameter includes a maximum number of blind detections or a maximum number of non-overlapping CCEs of the terminal.

In other embodiments of the present application, for any one of the configuration information, the configuration information may include indication information. Optionally, the indication information may be used to indicate a ratio of the maximum blind detection times corresponding to the configuration information to the maximum blind detection times of the terminal, and/or a ratio of the maximum non-overlapping CCE number corresponding to the configuration information to the maximum non-overlapping CCE number of the terminal. The term "ratio" herein may be replaced by other equivalent concepts such as percentage, etc. When the indication information includes a ratio of the maximum blind test times corresponding to the configuration information to the maximum blind test times of the terminal, the terminal may determine the maximum blind test times corresponding to the configuration information based on the indication information. When the indication information includes a ratio of the maximum number of non-overlapping CCEs corresponding to the configuration information to the maximum number of non-overlapping CCEs of the terminal, the terminal may determine the maximum number of non-overlapping CCEs corresponding to the configuration information based on the indication information. In addition, optionally, the indication information may be used to indicate the maximum number of blind tests corresponding to the configuration information and/or the maximum number of non-overlapping CCEs corresponding to the configuration information.

Step 2: for each configuration information, based on the maximum blind detection times and the maximum number of non-overlapping CCEs corresponding to the configuration information, DCI blind detection is performed in the search space configured by the configuration information.

Optionally, for any configuration information (hereinafter, referred to as first configuration information), the terminal may perform the following steps:

first, the plurality of search space sets configured by the first configuration information are sorted, for example, in the order from small to large (or in the order from large to small) of the IDs of the plurality of search space sets.

Then, for the search space set i obtained after the sorting, if the number of the remaining blind tests corresponding to the configuration information is greater than or equal to the number of the blind tests required for the DCI blind test in the search space included in the search space set i, and the number of the remaining non-overlapping CCEs corresponding to the configuration information is greater than or equal to the number of the non-overlapping CCEs of the search space set i, the DCI blind test is performed in the search space included in the search space set i, and when i is less than J-1, i +1 is assigned to i, and the step is executed again. And when the i is J-1, ending the DCI blind detection process. Wherein the initial value of i is 0, and i is more than or equal to 0 and less than or equal to J-1. J is the number of search space sets configured by the first configuration information. Otherwise:

in one implementation, the terminal may discard the search space set, that is, does not perform DCI blind detection in the search spaces included in the search space set any more, and end the DCI blind detection process for the configuration information.

In another implementation, the terminal may continue to perform DCI blind detection in the search spaces included in the search space set until there are no remaining blind detection times or no remaining number of non-overlapping CCEs for the configuration information, and end the DCI blind detection process for the configuration information. Therefore, the utilization rate of the blind detection times of the terminal can be improved, and the DCI discarding rate is favorably reduced.

Optionally, for multiple pieces of configuration information, the terminal may perform DCI blind detection on the search spaces configured by the multiple pieces of configuration information in series or in parallel. The specific serial mode or the parallel mode can be determined by the terminal according to the capability of the terminal to process information. Of course, the terminal may also perform DCI blind detection on the search space configured by a part of the N configuration information in a serial manner, and perform DCI blind detection on the search space configured by another part of the configuration information in a parallel manner.

Taking N pieces of configuration information including first configuration information and second configuration information, where the first configuration information is any one of the N pieces of configuration information, and the second configuration information is any one of the N pieces of configuration information except the first configuration information as an example, serially performing DCI blind detection on search spaces configured by a plurality of pieces of configuration information may include: and after finishing the DCI blind test in the search space configured by the first configuration information, the terminal performs the DCI blind test in the search space configured by the second configuration information. The parallel execution of DCI blind detection for the search spaces configured by the multiple pieces of configuration information may include: and the terminal performs DCI blind detection in the search space configured by the first configuration information and performs DCI blind detection in the search space configured by the second configuration information.

Optionally, when the N pieces of configuration information include the first configuration information and the second configuration information, the method shown in fig. 3 may further include: after DCI blind detection is completed in the search space configured by the first configuration information, if the search space configured by the first configuration information has remaining blind detection times and remaining number of non-overlapping CCEs, updating the maximum blind detection times and the maximum number of non-overlapping CCEs corresponding to the second configuration information. Based on this, step 2 in the above mode 1 may include: and performing DCI blind detection in the search space configured by the second configuration information according to the maximum blind detection times and the maximum number of non-overlapping CCEs corresponding to the updated second configuration information. This alternative implementation may be applied in a scenario where DCI blind detection for search spaces configured for multiple pieces of configuration information is performed serially or in parallel. Based on the optional implementation manner, after the DCI blind detection is completed in the search space configured by one piece of configuration information, the terminal allocates the remaining blind detection times and the remaining number of non-overlapping CCEs corresponding to the configuration information to another piece of configuration information, so that there are more DCI blind detection opportunities for the search space configured by the another piece of configuration information, and the utilization rate of the blind detection times of the terminal can be improved.

Based on the method 1, reference may be made to any one of the methods a to c above for a specific implementation manner in which DCI blind detection is completed in a search space configured by first configuration information.

Mode 2: if the search space sets configured by the N pieces of configuration information include a first search space set and a second search space set, and the two search space sets are search space sets configured by different pieces of configuration information, S104 may include the following steps:

step 1: and according to the number of the remaining blind tests of the terminal and the number of the remaining non-overlapping CCEs of the terminal, performing DCI blind test in the search space included in the first search space set. The number of the remaining blind tests of the terminal is determined based on the maximum number of the blind tests of the terminal, and the number of the remaining non-overlapping CCEs of the terminal is determined based on the maximum number of the non-overlapping CCEs of the terminal.

Specifically, if the remaining blind test times of the terminal are greater than or equal to the blind test times required for DCI blind test in the search space included in the first search space set and the remaining number of non-overlapping CCEs of the terminal is greater than or equal to the number of non-overlapping CCEs of the first search space set when step 1 is executed, DCI blind test is performed in the search space included in the first search space set.

It can be understood that, if the first search space set is the first search space set when the terminal performs DCI blind test on the search spaces configured by the received N pieces of configuration information, the remaining blind test times of the terminal are equal to the maximum blind test times of the terminal, and the number of remaining non-overlapping CCEs of the terminal is equal to the maximum number of non-overlapping CCEs of the terminal. If the first search space set is not the first search space set when the terminal performs DCI blind test on the search spaces configured by the received N pieces of configuration information, the number of the remaining blind tests of the terminal is equal to the value obtained by subtracting the used number of the blind tests from the maximum number of the blind tests of the terminal, and the number of the remaining non-overlapping CCEs of the terminal is equal to the value obtained by subtracting the used number of the non-overlapping CCEs from the maximum number of the non-overlapping CCEs of the terminal.

Step 2: and after the DCI blind detection is completed in the search space included in the first search space set, updating the number of the remaining blind detections of the terminal and the number of the remaining non-overlapping CCEs of the terminal.

And step 3: and performing DCI blind detection in the search space included in the second search space set according to the updated residual blind detection times of the terminal and the residual non-overlapping CCE number of the terminal.

Specifically, if the number of the remaining blind tests of the updated terminal is greater than or equal to the number of blind tests required for DCI blind test in the search space included in the second search space set, and the number of the remaining non-overlapping CCEs of the updated terminal is greater than or equal to the number of the non-overlapping CCEs of the second search space set, DCI blind test is performed in the search space included in the second search space set.

In one implementation, the method 2 may include: firstly, the terminal sorts the search space sets configured by each configuration information respectively, for example, according to the sequence (or the sequence) from small to large of the IDs of the search space sets; then, DCI blind inspection is completed in the search spaces included in the t-th remaining search space set configured by all remaining configuration information in the N configuration information, and then DCI blind inspection is performed in the search spaces included in the t + 1-th remaining search space set configured by all remaining configuration information. T is 1, 2, … …, and T-1, where T is the minimum value of the number of remaining search space sets in which each of the remaining pieces of configuration information is arranged. And repeating the steps until the DCI blind detection is completed in the search spaces configured by the N pieces of configuration information, or the number of the remaining blind detection times of the terminal is 0 or the number of the remaining non-overlapping CCEs of the terminal is 0. The remaining configuration information in the N pieces of configuration information refers to configuration information that does not have DCI blind detection performed thereon in the N pieces of configuration information. The remaining search space set configured by one configuration information refers to the search space set configured by the configuration information and on which the DCI blind test has not been performed yet.

For example, if the N pieces of configuration information are configuration information 1 and configuration information 2, and the configuration information 1 configures search space sets 1A, 1B, and 1C, and the configuration information 2 configures search space sets 2A, 2B, and 2C, the order of the search space sets for the terminal to perform the DCI blind test may be: the search space sets 1A, 2A, 1B, 2B, 1C, and 2C.

For another example, if the N pieces of configuration information are configuration information 1 and configuration information 2, and the configuration information 1 configures search space sets 1A, 1B, 1C, 1D, and 1E, and the configuration information 2 configures search space sets 2A, 2B, and 2C, the order of the search space sets targeted by the terminal to perform DCI blind test may be: the search space sets 1A, 2A, 1B, 2B, 1C, 2C, 1D, and 1E. It can be understood that after the DCI blind detection on the search spaces included in the search space set 2C is completed, the remaining configuration information in the N configuration information is configuration information 1, and the remaining search space sets configured by the configuration information 1 are search space sets 1D and 1E.

In the embodiment 2, reference may be made to any one of the above-mentioned embodiments a to b for a specific implementation manner in which DCI blind detection is completed in the search space configured by the first configuration information.

The scheme provided by the embodiment of the application is mainly introduced from the perspective of a method. To implement the above functions, it includes hardware structures and/or software modules for performing the respective functions. Those of skill in the art would readily appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as hardware or combinations of hardware and computer software. Whether a function is performed as hardware or computer software drives hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

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

Fig. 4 is a schematic structural diagram of a DCI detecting apparatus 40 according to an embodiment of the present disclosure. As an example, the apparatus 40 may specifically be a terminal. The apparatus 40 may comprise a receiving unit 401 and a processing unit 402. The receiving unit 401 is configured to receive N pieces of configuration information, where each piece of configuration information is used to configure at least one search space set, and each search space set includes at least one search space; n is not less than 2, and N is an integer. A processing unit 402, configured to determine to perform downlink control information DCI blind detection in the search space configured by the N configuration information according to the N configuration information. For example, in conjunction with fig. 3, the apparatus 40 may specifically be the terminal in fig. 3, the receiving unit 401 may be configured to execute S102, and the processing unit 402 may be configured to execute S103.

Optionally, the configuration information is PDCCH configuration, control resource set group configuration, search space set group configuration, cell group configuration, or DCI scrambling code configuration.

Optionally, the processing unit 402 is further configured to perform DCI blind detection in the search space configured by the N pieces of configuration information according to the maximum blind detection times of the terminal and the maximum number of non-overlapping Control Channel Elements (CCEs) of the terminal. For example, in conjunction with fig. 3, processing unit 402 may be configured to perform S104.

Optionally, the processing unit 402 is specifically configured to: determining the maximum blind test times and the maximum non-overlapping CCE number corresponding to each configuration information according to the maximum blind test times of the terminal, the maximum non-overlapping CCE number of the terminal and the value of N; for each configuration information, based on the maximum blind detection times and the maximum number of non-overlapping CCEs corresponding to the configuration information, DCI blind detection is performed in the search space configured by the configuration information.

Optionally, the search space sets configured by the N pieces of configuration information include a first search space set and a second search space set, where the first search space set and the second search space set are search space sets configured by different pieces of configuration information; the processing unit 402 is specifically configured to: according to the number of the remaining blind tests of the terminal and the number of the remaining non-overlapping CCEs of the terminal, performing DCI blind test in a search space included in the first search space set; the number of the remaining blind tests of the terminal is determined based on the maximum number of the blind tests of the terminal, and the number of the remaining non-overlapping CCEs of the terminal is determined based on the maximum number of the non-overlapping CCEs of the terminal; after DCI blind detection is completed in a search space included in the first search space set, updating the number of the remaining blind detection times of the terminal and the number of the remaining non-overlapping CCEs of the terminal; and performing DCI blind detection in the search space included in the second search space set according to the updated residual blind detection times of the terminal and the residual non-overlapping CCE number of the terminal.

Optionally, the N pieces of configuration information include first configuration information, and the processing unit 402 is further configured to, if the DCI blind test is completed in the search space configured by the first configuration information, stop performing the DCI blind test in the search space configured by the first configuration information; the DCI blind detection is completed in the search space configured by the first configuration information, and the DCI blind detection includes: DCI blind detection is carried out on the search spaces configured by the first configuration information; or, the DCI is detected in the search space configured by the first configuration information; or, there are no remaining blind detection times or remaining number of non-overlapping CCEs for the first configuration information.

Optionally, the N pieces of configuration information include first configuration information and second configuration information, and the processing unit 402 is further configured to, after the DCI blind test is completed in the search space configured by the first configuration information, if the search space configured by the first configuration information still has remaining blind test times and remaining number of non-overlapping CCEs, update the maximum blind test times and the maximum number of non-overlapping CCEs corresponding to the second configuration information. In this case, the processing unit 402 is specifically configured to: and performing DCI blind detection in the search space configured by the second configuration information according to the maximum blind detection times and the maximum number of non-overlapping CCEs corresponding to the updated second configuration information.

Optionally, the N pieces of configuration information include target configuration information; the processing unit 402 is specifically configured to: according to the maximum blind detection times of the terminal, the maximum number of non-overlapping CCEs of the terminal and a target aggregation level, performing DCI blind detection in a search space included in a search space set configured by target configuration information, wherein the target aggregation level is greater than or equal to a preset threshold; or, according to the maximum blind detection times of the terminal, the maximum number of non-overlapping CCEs of the terminal and the target DCI format, performing DCI blind detection in a search space included in a search space set configured by the target configuration information; or, according to the maximum blind detection times of the terminal, the maximum number of non-overlapping CCEs of the terminal and the target time domain symbol, performing DCI blind detection in a search space included in a search space set configured by the target configuration information.

As an example, the receiving unit 401 may be implemented by the communication interface 204 in fig. 2. The processing unit 402 may be implemented by the memory 203 and a processor (e.g., the processor 201 and/or the processor 207) in fig. 2.

It can be understood that, for the term explanation, the specific implementation manner and the beneficial effects related to any one of the embodiments of the DCI detecting apparatus provided above, reference may be made to the corresponding method embodiment portion, and details are not described here.

The embodiment of the application also provides a communication system which comprises a terminal and one or more network devices. Wherein the terminal may be the corresponding DCI detecting device 40 provided above. The antenna panels of the network device or the network devices may cooperate to participate in data transmission of a terminal or jointly receive data transmitted by a terminal.

In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented using a software program, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. The processes or functions according to the embodiments of the present application are generated in whole or in part when the computer-executable instructions are loaded and executed on a computer. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored on a computer readable storage medium or transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wire (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). Computer-readable storage media can be any available media that can be accessed by a computer or can comprise one or more data storage devices, such as servers, data centers, and the like, that can be integrated with the media. The usable medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., Solid State Disk (SSD)), among others.

While the present application has been described in connection with various embodiments, other variations to the disclosed embodiments can be understood and effected by those skilled in the art in practicing the claimed application, from a review of the drawings, the disclosure, and the appended claims. In the claims, the word "comprising" does not exclude other elements or steps, and the word "a" or "an" does not exclude a plurality. A single processor or other unit may fulfill the functions of several items recited in the claims. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to advantage.

Although the present application has been described in conjunction with specific features and embodiments thereof, it will be evident that various modifications and combinations can be made thereto without departing from the spirit and scope of the application. Accordingly, the specification and figures are merely exemplary of the present application as defined in the appended claims and are intended to cover any and all modifications, variations, combinations, or equivalents within the scope of the present application. It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.

Claims

1. A method for detecting Downlink Control Information (DCI) is applied to a terminal, and the method comprises the following steps:

receiving N pieces of configuration information, wherein each piece of configuration information is used for configuring at least one search space set, and each search space set comprises at least one search space; n is more than or equal to 2, and is an integer;

and determining to perform DCI blind detection in the search space configured by the N pieces of configuration information according to the N pieces of configuration information.

2. The method of claim 1, wherein the configuration information is a Physical Downlink Control Channel (PDCCH) configuration, a control resource set configuration, a search space set configuration, a cell group configuration, or a DCI scrambling code configuration.

3. The method according to claim 1 or 2, characterized in that the method further comprises:

and performing DCI blind detection in the search space configured by the N pieces of configuration information according to the maximum blind detection times of the terminal and the maximum number of the CCEs (control channel elements) of the terminal.

4. The method according to claim 3, wherein the performing DCI blind detection in the search space configured by the N pieces of configuration information according to the maximum number of blind detections for the terminal and the maximum number of non-overlapping CCEs for the terminal comprises:

determining the maximum blind test times and the maximum non-overlapping CCE number corresponding to each configuration information according to the maximum blind test times of the terminal, the maximum non-overlapping CCE number of the terminal and the value of the N;

and for each piece of configuration information, performing DCI blind detection in the search space configured by the configuration information based on the maximum blind detection times and the maximum number of non-overlapping CCEs corresponding to the configuration information.

5. The method according to claim 3, wherein the set of search spaces configured by the N pieces of configuration information includes a first set of search spaces and a second set of search spaces, and the first set of search spaces and the second set of search spaces are sets of search spaces configured by different pieces of configuration information; the performing DCI blind test in the search space configured by the N configuration information according to the maximum blind test times of the terminal and the maximum number of non-overlapping CCEs of the terminal includes:

according to the number of the remaining blind tests of the terminal and the number of the remaining non-overlapping CCEs of the terminal, performing DCI blind test in a search space included in the first search space set; the number of the remaining blind tests of the terminal is determined based on the maximum number of the blind tests of the terminal, and the number of the remaining non-overlapping CCEs of the terminal is determined based on the maximum number of the non-overlapping CCEs of the terminal;

after DCI blind detection is completed in the search space included in the first search space set, updating the number of the remaining blind detection times of the terminal and the number of the remaining non-overlapping CCEs of the terminal;

and performing DCI blind detection in the search space included in the second search space set according to the updated number of the remaining blind detections of the terminal and the number of the remaining non-overlapping CCEs of the terminal.

6. The method of any of claims 1 to 5, wherein the N configuration information comprises first configuration information, the method further comprising:

if DCI blind detection is finished in the search space configured by the first configuration information, stopping DCI blind detection in the search space configured by the first configuration information;

wherein the DCI blind detection is completed in the search space configured by the first configuration information, includes: DCI blind detection is carried out on the search spaces configured by the first configuration information; alternatively, DCI is detected in the search space configured by the first configuration information.

7. The method of claim 4, wherein the N configuration information comprises first configuration information, and wherein the method further comprises:

wherein the DCI blind detection is completed in the search space configured by the first configuration information, includes: there is no remaining number of blind tests or remaining number of non-overlapping CCEs for the first configuration information.

8. The method of claim 4, wherein the N configuration information comprises a first configuration information and a second configuration information, and wherein the method further comprises:

after DCI blind detection is completed in the search space configured by the first configuration information, if the search space configured by the first configuration information has remaining blind detection times and remaining number of non-overlapping CCEs, updating the maximum blind detection times and the maximum number of non-overlapping CCEs corresponding to the second configuration information;

the performing DCI blind detection in the search space configured by the configuration information based on the maximum blind detection times and the maximum number of non-overlapping CCEs corresponding to the configuration information for each piece of configuration information includes:

and performing DCI blind detection in the search space configured by the second configuration information according to the updated maximum blind detection times and the maximum number of non-overlapping CCEs corresponding to the second configuration information.

9. The method according to any one of claims 1 to 8, wherein the N pieces of configuration information include target configuration information, and the performing DCI blind detection in the search space configured by the N pieces of configuration information according to the maximum number of blind detections for the terminal and the maximum number of non-overlapping CCEs for the terminal comprises:

according to the maximum blind detection times of the terminal, the maximum number of non-overlapping CCEs of the terminal and a target aggregation level, performing DCI blind detection in a search space included in a search space set configured by the target configuration information, wherein the target aggregation level is greater than or equal to a preset threshold;

or, according to the maximum blind detection times of the terminal, the maximum number of non-overlapping CCEs of the terminal and a target DCI format, performing DCI blind detection in a search space included in a search space set configured by the target configuration information;

or, according to the maximum blind detection times of the terminal, the maximum number of non-overlapping CCEs of the terminal, and a target time domain symbol, performing DCI blind detection in a search space included in a search space set configured by the target configuration information.

10. A terminal, characterized in that the terminal comprises:

a receiving unit, configured to receive N pieces of configuration information, where each piece of configuration information is used to configure at least one search space set, and each search space set includes at least one search space; n is more than or equal to 2, and is an integer;

and the processing unit is used for determining to perform DCI blind detection in the search space configured by the N pieces of configuration information according to the N pieces of configuration information.

11. The terminal of claim 10, wherein the configuration information is a Physical Downlink Control Channel (PDCCH) configuration, a control resource set configuration, a search space set configuration, a cell group configuration, or a DCI scrambling code configuration.

12. The terminal according to claim 10 or 11,

the processing unit is further configured to perform DCI blind detection in the search space configured by the N pieces of configuration information according to the maximum blind detection times of the terminal and the maximum number of non-overlapping Control Channel Elements (CCEs) of the terminal.

13. The terminal according to claim 12, wherein the processing unit is specifically configured to:

14. The terminal according to claim 12, wherein the set of search spaces configured by the N pieces of configuration information includes a first set of search spaces and a second set of search spaces, and the first set of search spaces and the second set of search spaces are sets of search spaces configured by different pieces of configuration information; the processing unit is specifically configured to:

15. The terminal according to any one of claims 10 to 14, wherein the N pieces of configuration information include first configuration information, and the processing unit is further configured to, if DCI blind detection is completed in a search space configured by the first configuration information, stop DCI blind detection in the search space configured by the first configuration information;

16. The terminal according to claim 13, wherein the N pieces of configuration information include first configuration information, and the processing unit is further configured to, if DCI blind detection is completed in a search space configured by the first configuration information, stop DCI blind detection in the search space configured by the first configuration information;

17. The terminal according to claim 13, wherein the N configuration information includes first configuration information and second configuration information, and the processing unit is further configured to, after DCI blind detection is completed in the search space configured by the first configuration information, update a maximum blind detection number and a maximum number of non-overlapping CCEs corresponding to the second configuration information if there are remaining blind detection numbers and remaining number of non-overlapping CCEs in the search space configured by the first configuration information;

the processing unit is specifically configured to: and performing DCI blind detection in the search space configured by the second configuration information according to the updated maximum blind detection times and the maximum number of non-overlapping CCEs corresponding to the second configuration information.

18. The terminal according to any of claims 10 to 17, wherein the N configuration information comprises target configuration information; the processing unit is specifically configured to:

19. A Downlink Control Information (DCI) detection device is characterized by comprising a memory and a processor; the memory is used for storing program codes; the processor is configured to invoke the program code to perform the method of any of claims 1 to 9.

20. A computer-readable storage medium, having stored thereon a computer program which, when run on a computer, causes the computer to perform the method of any one of claims 1 to 9.