CN114424667A

CN114424667A - Communication method and device

Info

Publication number: CN114424667A
Application number: CN201980100568.1A
Authority: CN
Inventors: 马蕊香
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2019-09-30
Filing date: 2019-09-30
Publication date: 2022-04-29
Anticipated expiration: 2039-09-30
Also published as: WO2021062687A1; CN114424667B

Abstract

A communication method and a device are provided, wherein the communication method comprises the following steps: receiving indication information indicating the number of downlink cells, determining a first blind detection capability of a scheduling cell according to the number of the downlink cells, wherein the scheduling cell is a cell in the downlink cell, the first blind detection capability is the number of the largest non-overlapping Control Channel Elements (CCEs) of each time window span or the number of the largest candidate Physical Downlink Control Channels (PDCCHs) of each time window span, the time domain length of the span is less than the time domain length of a time slot, and carrying out PDCCH blind detection in the scheduling cell according to the first blind detection capability. The method can determine the blind detection capability of the terminal equipment in each span in a CA scene, thereby meeting the requirements of low delay and high reliability of services.

Description

Communication method and device

Technical Field

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

Background

In a communication system, a network device transmits Downlink Control Information (DCI) to a terminal device through a Physical Downlink Control Channel (PDCCH). One DCI is transmitted in one PDCCH, and one PDCCH occupies one or more Control Channel Elements (CCEs). The network equipment selects 1 CCE, 2 CCEs, 4 CCEs or 8 CCEs for transmitting the DCI according to the size of the DCI and the required transmission reliability of the control channel. And the terminal equipment receives the DCI carried in the PDCCH through blind detection. Different types of communication services require different blind detection capabilities of terminal devices, where the blind detection capabilities include the number of non-overlapping CCEs that the terminal device can perform channel estimation within a period of time or the number of maximum candidate physical downlink control channels PDCCH that can be blindly detected within a period of time.

In the technical research of a 5G New Radio, 5G-NR, a concept of a time window (span) is introduced, where the span may also be referred to as a monitoring time window (monitoring span), a span length is less than a slot length, and in a single carrier scenario, the number of non-overlapping CCEs that a terminal device can perform channel estimation in a span or the number of maximum candidate physical downlink control channels PDCCH that can be blindly detected in a period of time is defined.

However, in the Carrier Aggregation (CA) scenario, there is no clear solution for determining how to determine the blind detection capability of the terminal device at each span.

Disclosure of Invention

The embodiment of the application provides a communication method and device, which are used for determining the blind detection capability of terminal equipment in each span in a CA (conditional access) scene, so that the requirements of low delay and high reliability of services are met.

In a first aspect, a communication method is provided, where an execution subject of the method may be a terminal device, and may also be a chip applied to the terminal device. The following description will be given taking as an example that the execution main body is a terminal device. The method comprises the following steps: receiving first indication information, wherein the first indication information can be used for indicating the number of downlink cells, and determining a first blind detection capability of a scheduling cell according to the number of the downlink cells, the scheduling cell is a cell in the downlink cells, the first blind detection capability is the number of the largest non-overlapping Control Channel Elements (CCEs) of each time window span or the number of the largest candidate Physical Downlink Control Channels (PDCCHs) of each time window span, the time domain length of the span is smaller than the time domain length of a time slot, and PDCCH blind detection is performed in the scheduling cell according to the first blind detection capability.

In a second aspect, a communication method is provided, and an execution subject of the method may be a network device or a chip applied to the network device. The following description will be given taking as an example that the execution subject is a network device. The method comprises the following steps: sending first indication information, wherein the first indication information indicates the number of downlink cells, and determining a first blind detection capability of a terminal device in a scheduling cell according to the number of the downlink cells, wherein the scheduling cell is a cell in the downlink cells, the first blind detection capability is the number of the largest non-overlapping Control Channel Elements (CCEs) of each time window span or the number of the largest candidate Physical Downlink Control Channels (PDCCHs) of each time window span, and the time domain length of the span is less than the time domain length of a time slot; and sending the PDCCH in the scheduling cell according to the first blind detection capability.

In the embodiments of the first aspect and the second aspect, the terminal device may determine the blind detection capability of the terminal device in each span of each scheduling cell according to the number of downlink cells, and thus, by the method provided in the embodiments of the present application, the first blind detection capability of the terminal device in each scheduling cell may be determined in a carrier aggregation scenario. Meanwhile, the first blind detection capability of each scheduling cell is determined according to the number of downlink cells, and when the number of the downlink cells is larger, the determined first blind detection capability of each scheduling cell is correspondingly larger, so that the terminal equipment can be ensured to blindly detect more candidate PDCCHs in one span, or the terminal equipment can be ensured to carry out more non-overlapping CCEs for channel estimation in one span, and the low time delay and the high reliability of the service are ensured.

In an embodiment of the first aspect and the second aspect, the determined first blind detection capability of the scheduling cell is any one of:

for example, when the number of the downlink cells is less than or equal to a first value, the determined first blind detection capability of the scheduling cell is a sum of first blind detection capabilities of all cells in all the scheduled cells. By adopting the scheme, the blind detection capability of the scheduling cell is increased along with the increase of the number of the scheduled cells, so that the first blind detection capability of the scheduling cell can be increased, and under the scene of cross-carrier scheduling, the terminal equipment can be ensured to have enough first blind detection capability in the scheduling cell to carry out blind detection on the PDCCH of the scheduled cell, thereby ensuring low time delay and high reliability of services in the scheduled cell.

For example, when the number of the downlink cells is less than or equal to a first value, the determined first blind detection capability of the scheduling cell is a product of a maximum value of the first blind detection capabilities of all the scheduled cells and the number of the scheduled cells. By adopting the scheme, the blind detection capability of the scheduling cell is increased in proportion to the number of the scheduled cells, namely the first blind detection capability of the scheduling cell can be increased, and under the scene of cross-carrier scheduling, the terminal equipment can be ensured to have enough first blind detection capability in the scheduling cell to carry out blind detection on the PDCCH of the scheduled cell, so that the low time delay and high reliability of services in the scheduled cell are ensured.

For example, when the number of the downlink cells is less than or equal to a first value, the determined first blind detection capability of the scheduling cell is

Wherein j represents the index of the subcarrier spacing, and the subcarrier spacing corresponding to j is 2^j×15kHz，K ^jIndicating subcarrier spacing of 2 in all scheduled cells^jMaximum value of first blind detection capability, L, for scheduled cell of x 15kHz^jSubcarrier spacing of 2 for all scheduled cells^jThe number of scheduled cells multiplied by 15kHz, J is a positive integer. With this scheme, in the scheduling cellFor subcarrier spacing of 2^jThe first blind detection capability of the scheduled cell multiplied by 15kHz is the product of the maximum first blind detection capability of the scheduled cell at the subcarrier interval in all the scheduled cells and the number of the scheduled cells at the subcarrier interval, so that the terminal equipment is ensured to have the maximum first blind detection capability to perform blind detection on the PDCCH of the scheduled cell in each subcarrier interval, and the low delay and high reliability of the service in the scheduled cell are ensured.

Illustratively, the number of the downlink cells is less than or equal to a first value, and the determined first blind detection capability of the scheduling cell is

Wherein j represents the index of the subcarrier spacing, and the subcarrier spacing corresponding to j is 2^j×15kHz，K ^jIndicating subcarrier spacing of 2 in all scheduled cells^jMinimum value of first blind detection capability, L, of scheduled cell of x 15kHz^jSubcarrier spacing of 2 for all scheduled cells^jThe number of scheduled cells multiplied by 15kHz, J is a positive integer. With this scheme, the subcarrier spacing is 2 in the scheduling cell^jThe first blind detection capability of the scheduled cell multiplied by 15kHz is the product of the minimum first blind detection capability of the scheduled cell at the subcarrier interval and the number of the scheduled cells at the subcarrier interval, so that it is ensured that for the scheduled cell at each subcarrier interval, the terminal equipment has the minimum first blind detection capability to blindly detect the PDCCH of the scheduled cell, and thus it is ensured that the first blind detection capability of the terminal equipment at the scheduling cell is not too large (i.e. normal scheduling of the scheduled cell is ensured) in a carrier aggregation scene, and power loss of the terminal equipment is reduced.

Illustratively, the number of the downlink cells is greater than a first value, and the determined first blind detection capability of the scheduling cell is

Wherein j represents the index of the subcarrier spacing, and the subcarrier spacing corresponding to j is 2^j×15kHz，K ^jIndicating subcarrier spacing of 2 in all scheduled cells^jMaximum value of first blind detection capability, L, of scheduled cell of x 15kHz^jSubcarrier spacing of 2 for all scheduled cells^jThe number of the scheduled cells multiplied by 15kHz, J is a positive integer, N is the number of the scheduling cells, and M is the number of the downlink cells. By adopting the scheme, because the number of the downlink cells is larger than the first value, namely the number of the configured downlink cells is more than the number of the cells which can support blind detection by the terminal equipment, at the moment, if the subcarrier intervals of all the scheduled cells are still 2^jX 15kHz, due to K^jIndicating subcarrier spacing of 2 in all scheduled cells^jMaximum value of first blind detection capability of scheduled cell of x 15kHz, then maximum first blind detection capability for this subcarrier spacing should be N x K^jHowever, the number of scheduling cells actually spaced by the subcarrier is L^jOccupying only L in all downlink cells^j/M, thus, the spacing is 2 for subcarriers^jThe total first blind detection capability of the scheduling cell of x 15kHz is

That is, the maximum first blind detection capability of all the scheduled cells with the small subcarrier spacing is calculated, and then the same method is adopted for the scheduled cells with the certain subcarrier spacing, so that the blind detection capability of all the scheduled cells in the scheduling cell is calculated to be the sum of the maximum first blind detection capability of all the scheduled cells with the all subcarrier spacing. Therefore, the first blind detection capability of the scheduling cell is not increased in proportion to the increase of the number of downlink cells without limit, but is limited by the number of blind detection cells which can be supported by the terminal equipment, and the terminal equipment can supportThe maximum blind detection capability supported is divided into downlink cells actually scheduled by the terminal equipment, so that the first blind detection capability of the finally determined scheduling cell is ensured not to exceed the blind detection capability which can be supported by the terminal equipment, and the power consumption and the realization complexity of the terminal equipment are reduced.

Wherein j represents the index of the subcarrier spacing, and the subcarrier spacing corresponding to j is 2^j×15kHz，K ^jIndicating subcarrier spacing of 2 in all scheduled cells^jMinimum value of first blind detection capability, L, of scheduled cell of x 15kHz^jSubcarrier spacing of 2 for all scheduled cells^jThe number of the scheduled cells multiplied by 15kHz, J is a positive integer, N is the number of the scheduling cells, and M is the number of the downlink cells. By adopting the scheme, because the number of the downlink cells is larger than the first value, namely the number of the configured downlink cells is larger than the number of the cells which can support blind detection by the terminal equipment, at this time, the subcarrier intervals of all the scheduled cells are assumed to be 2^j×15kHz，K ^jIndicating subcarrier spacing of 2 in all scheduled cells^jX 15kHz minimum of the first blind detection capability of the scheduled cell, then the minimum first blind detection capability for this subcarrier spacing should be N x K^jHowever, the number of scheduling cells actually spaced by the subcarrier is L^jOccupying only L in all downlink cells^j/M, thus, the spacing is 2 for subcarriers^jThe total first blind detection capability of the scheduling cell of x 15kHz is

I.e. calculating the minimum of all scheduled cells under the condition of small subcarrier spacingAnd then, aiming at the scheduled cells with the subcarrier intervals, the same mode is adopted, so that the blind detection capability of all the scheduled cells is calculated to be the sum of the minimum first blind detection capability of all the scheduled cells with all the subcarrier intervals. Therefore, the first blind detection capability of the scheduling cell is not increased in proportion according to the increase of the number of downlink cells without limit, but is limited by the number of the blind detection cells which can be supported by the terminal equipment, the blind detection capability which can be supported by the terminal equipment is divided into the downlink cells which are actually scheduled by the terminal equipment, and therefore the first blind detection capability of the finally determined scheduling cell is ensured not to exceed the blind detection capability which can be supported by the terminal equipment, the power consumption of the terminal equipment is reduced, and the complexity is realized.

Wherein j represents the index of the subcarrier spacing, and the subcarrier spacing corresponding to j is 2^jX 15kHz, J is a positive integer, L^jSubcarrier spacing of 2 for all scheduled cells^jThe number of the scheduled cells multiplied by 15kHz, M is the number of the downlink cells; q^jIs equal to

Where i is the subcarrier spacing of 2^jIndex of span pattern of x 15kHz, H is subcarrier spacing of 2^jThe number of span patterns multiplied by 15kHz,

indicating a subcarrier spacing of 2^jThe number of downlink cells corresponding to a span pattern with index of i multiplied by 15kHz, CⁱIndicating a subcarrier spacing of 2^jSecond blind detection capability for span pattern with index i x 15 kHz. With this scheme, the subcarrier spacing is 2^jThe second blind detection capability corresponding to the span pattern with index i multiplied by 15kHz, that is, the subcarrier interval reported by the terminal equipment is 2^jBlind detection capability per span pattern of x 15kHz, determining subcarrier spacing of 2^jAnd the first blind detection capability of the scheduling cell multiplied by 15kHz is obtained, and then the blind detection capabilities of the scheduling cells at all subcarrier intervals are summed to obtain the small scheduling blind detection capability. Under the scene of carrier aggregation, the first blind detection capability of the scheduling cell is not increased in proportion according to the increase of the number of downlink cells without limit, but is limited by the number of the blind detection cells which can be supported by the terminal equipment, and the blind detection capability which can be supported by the terminal equipment is divided into the downlink cells which are actually scheduled by the terminal equipment, so that the first blind detection capability of the finally determined scheduling cell is ensured not to exceed the blind detection capability which can be supported by the terminal equipment, the power consumption of the terminal equipment is reduced, and the complexity is realized.

Illustratively, the second blind detection capability is a blind detection capability corresponding to each span pattern that is reported by the terminal device when reporting the span pattern to the network device, and the second blind detection capability is the number of the largest non-overlapping control channel elements CCE of each time window span corresponding to each pattern or the number of the largest candidate physical downlink control channel PDCCH of each time window span.

In the foregoing first aspect embodiment, before the terminal device determines the first blind detection capability of the scheduling cell, the method may further include: determining a first blind detection capability for each of the scheduled cells. Therefore, the first blind detection capability of the scheduling cell can be determined according to the first blind detection capability of each scheduled cell.

In the foregoing embodiment of the first aspect, the method may further include: and sending second indication information, wherein the second indication information is used for indicating the first numerical value. Specifically, the first value may be actively reported by the terminal device, so that the network device may refer to the first value when indicating the number of the downlink cells through the first indication information, where the first value indicates the number of the downlink cells where the terminal device can perform the blind detection on the PDCCH. And ensuring that the configured PDCCH blind detection times and the configured number of non-overlapping CCEs does not exceed the number of downlink cells capable of blindly detecting the PDCCH by the terminal equipment as much as possible.

In the foregoing embodiment of the first aspect, the method further includes: the first value may also be protocol predefined. The network device may refer to a first value predefined by the protocol when indicating the number of downlink cells through the first indication information.

For example, the predefined first value is 4, and the first value represents the number of downlink cells capable of performing blind detection on PDCCH by the terminal device. Therefore, the configured PDCCH blind detection times and the configured number of non-overlapping CCEs are ensured to be not more than the number of downlink cells capable of blindly detecting the PDCCH by the terminal equipment as much as possible.

In the foregoing second aspect, the method further includes: determining a first blind detection capability of each of the scheduled cells of the terminal device.

In the foregoing second aspect, the method further includes: and receiving second indication information, wherein the second indication information is used for indicating the first numerical value.

In a third aspect, a communication device is provided, and beneficial effects may be described with reference to the first aspect, which are not described herein again, and the communication device has a function of implementing the behaviors in the method embodiment of the first aspect. The functions can be realized by hardware, and the functions can also be realized by executing corresponding software by hardware. The hardware or software includes one or more modules corresponding to the above-described functions. In one possible design, the communication device includes: the scheduling method comprises a receiving and sending unit used for receiving first indication information, wherein the first indication information indicates the number of downlink cells, and a processing unit used for determining a first blind detection capability of a scheduling cell according to the number of the downlink cells indicated by the first indication information received by the receiving and sending unit, and performing PDCCH blind detection in the scheduling cell according to the first blind detection capability, wherein the scheduling cell is a cell in the downlink cells, the first blind detection capability is the number of largest non-overlapping Control Channel Elements (CCEs) of each time window span or the number of largest candidate Physical Downlink Control Channels (PDCCHs) of each time window span, and the time domain length of the span is smaller than the time domain length of a time slot. The modules may perform corresponding functions in the method example of the first aspect, for specific reference, detailed description of the method example is omitted here for brevity.

In a fourth aspect, a communication apparatus is provided, and advantageous effects may be found in the description of the second aspect and will not be described herein again. The communication device has the functionality to implement the actions in the method example of the second aspect described above. The functions can be realized by hardware, and the functions can also be realized by executing corresponding software by hardware. The hardware or software includes one or more modules corresponding to the above-described functions. In one possible design, the communication device includes: and the transceiver unit is used for sending first indication information, and the first indication information indicates the number of downlink cells. A processing unit, configured to determine, according to the number of the downlink cells, a first blind detection capability of a terminal device in a scheduling cell, where the scheduling cell is a cell in the downlink cell, the first blind detection capability is the number of largest non-overlapping Control Channel Elements (CCEs) of each time window span or the number of largest candidate Physical Downlink Control Channels (PDCCHs) of each time window span, and a time domain length of the span is smaller than a time domain length of one time slot; the transceiver unit is configured to send a PDCCH in the scheduling cell according to the first blind detection capability determined by the processing unit. The modules may perform corresponding functions in the method example of the second aspect, for specific reference, detailed description of the method example is given, and details are not repeated here.

In a fifth aspect, a communication apparatus is provided, where the communication apparatus may be the terminal device in the above method embodiment, or a chip provided in the terminal device. The communication device comprises a communication interface, a processor and optionally a memory. Wherein the memory is adapted to store a computer program or instructions, and the processor is coupled to the memory and the communication interface, and when the processor executes the computer program or instructions, the communication apparatus is adapted to perform the method performed by the terminal device in the above-mentioned method embodiments.

In a sixth aspect, a communication apparatus is provided, where the communication apparatus may be the network device in the above method embodiment, or a chip disposed in the network device. The communication device comprises a communication interface, a processor and optionally a memory. Wherein the memory is used for storing a computer program or instructions, and the processor is coupled with the memory and the communication interface, and when the processor executes the computer program or instructions, the communication device is caused to execute the method executed by the network device in the above method embodiment.

In a seventh aspect, a computer program product is provided, the computer program product comprising: computer program code which, when run, causes the method performed by the terminal device in the above aspects to be performed.

In an eighth aspect, there is provided a computer program product comprising: computer program code which, when executed, causes the method performed by the network device in the above aspects to be performed.

In a ninth aspect, the present application provides a chip system, which includes a processor, and is configured to implement the functions of the terminal device in the methods of the above aspects. In one possible design, the system-on-chip further includes a memory for storing program instructions and/or data. The chip system may be formed by a chip, or may include a chip and other discrete devices.

In a tenth aspect, the present application provides a chip system, which includes a processor for implementing the functions of the network device in the method of the above aspects. In one possible design, the system-on-chip further includes a memory for storing program instructions and/or data. The chip system may be formed by a chip, or may include a chip and other discrete devices.

In an eleventh aspect, the present application provides a computer-readable storage medium storing a computer program that, when executed, implements the method performed by the terminal device in the above-described aspects.

In a twelfth aspect, the present application provides a computer-readable storage medium storing a computer program that, when executed, implements the method performed by the network device in the above-described aspects.

Drawings

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

fig. 2 is a schematic diagram of a PDCCH blind detection timing according to an embodiment of the present disclosure;

fig. 3 is a schematic diagram of a network architecture according to an embodiment of the present application;

fig. 4 is a flowchart illustrating a communication method according to an embodiment of the present application;

fig. 5 is a schematic diagram of a blind detection capability of 5 cells according to an embodiment of the present application;

fig. 6 is a schematic structural diagram of a communication device according to an embodiment of the present application;

fig. 7 is a schematic structural diagram of another communication device according to an embodiment of the present application;

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

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

fig. 10 is a schematic structural diagram of another communication device according to an embodiment of the present application.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the embodiments of the present application will be described in further detail with reference to the accompanying drawings.

Before describing the present application, a part of terms in the embodiments of the present application will be briefly explained so as to be easily understood by those skilled in the art.

1) A terminal device, which may be referred to as a terminal for short, also called a User Equipment (UE), is a device having a wireless transceiving function. The terminal equipment can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; can also be deployed on the water surface (such as a ship and the like); and may also be deployed in the air (e.g., airplanes, drones, balloons, satellites, etc.). The terminal equipment can be a mobile phone, a tablet personal computer, a computer with a wireless transceiving function, virtual reality terminal equipment, augmented reality terminal equipment, wireless terminal equipment in industrial control, wireless terminal equipment in unmanned driving, wireless terminal equipment in telemedicine, wireless terminal equipment in a smart grid, wireless terminal equipment in transportation safety, wireless terminal equipment in a smart city and wireless terminal equipment in a smart family. The terminal equipment may also be fixed or mobile. The embodiments of the present application do not limit this.

In the embodiment of the present application, the apparatus for implementing the function of the terminal may be a terminal device; it may also be an apparatus, such as a system-on-chip, capable of supporting the terminal device to implement the function, and the apparatus may be installed in the terminal device. In the embodiment of the present application, the chip system may be composed of a chip, and may also include a chip and other discrete devices. In the technical solution provided in the embodiment of the present application, a device for implementing a function of a terminal device is taken as an example of a terminal device, and the technical solution provided in the embodiment of the present application is described.

2) The network device may be an access network device, and the access network device may also be referred to as a Radio Access Network (RAN) device, which is a device providing a wireless communication function for the terminal device. Access network equipment includes, for example but not limited to: a next generation base station (gbb) in 5G, an evolved node B (eNB), a baseband unit (BBU), a transceiving point (TRP), a Transmitting Point (TP), a base station in a future mobile communication system or an access point in a WiFi system, and the like. The access network device may also be a wireless controller, a Centralized Unit (CU), and/or a Distributed Unit (DU) in a Cloud Radio Access Network (CRAN) scenario, or the network device may be a relay station, a vehicle-mounted device, a network device in a PLMN network that is evolved in the future, and the like.

The terminal device may communicate with multiple access network devices of different technologies, for example, the terminal device may communicate with an access network device supporting Long Term Evolution (LTE), may communicate with an access network device supporting 5G, and may simultaneously communicate with an access network device supporting LTE and an access network device supporting 5G. The embodiments of the present application are not limited.

In the embodiment of the present application, the apparatus for implementing the function of the network device may be a network device; or may be a device, such as a system-on-chip, capable of supporting the network device to implement the function, and the device may be installed in the network device. In the technical solution provided in the embodiment of the present application, a device for implementing a function of a network device is taken as an example of a network device, and the technical solution provided in the embodiment of the present application is described.

3) In application scenarios of the fifth generation Mobile (5G) communication system, the International Telecommunications Union (ITU) defines three major application scenarios for 5G and future Mobile communication systems, which are Enhanced Mobile Broadband (eMBB), high-reliability Low-Latency communication (URLLC), and Massive Machine Type communication (mtc), respectively. Among the typical eMBB services are: the services include ultra high definition video, Augmented Reality (AR), Virtual Reality (VR), and the like, and these services are mainly characterized by large transmission data volume and high transmission rate. Typical URLLC services are: the main characteristics of the applications of wireless control in industrial manufacturing or production processes, motion control of unmanned automobiles and unmanned airplanes, and haptic interaction such as remote repair and remote operation are that ultra-high reliability, low time delay, less transmission data volume and burstiness are required. Typical mtc services are: the intelligent power distribution automation system has the main characteristics of huge quantity of networking equipment, small transmission data volume and insensitivity of data to transmission delay, and the mMTC terminals need to meet the requirements of low cost and very long standby time. Different services have different requirements on the mobile communication system, and how to better support the data transmission requirements of multiple different services simultaneously is a technical problem to be solved by the current 5G communication system. For example, how to support URLLC service and eMBB service simultaneously is one of the hot spots for discussion of current 5G mobile communication systems.

4) The Search Space includes a Common Search Space (CSS) and a terminal-device specific Search Space (USS). A plurality of terminal devices may all search for DCI sent by a network device to the terminal device in a CSS, where the CSS is used to carry common DCI. The USS is respectively configured for each terminal device by the network device, and the terminal device detects DCI sent by the network device in the USS according to the configuration information sent by the network device.

5) CCE, one CCE may include a plurality of resource element groups. The number of resource element groups corresponding to one CCE may be fixed. For example, 4 or 6. One resource element group may occupy S consecutive subcarriers in the frequency domain and/or T consecutive OFDM symbols in the time domain. Wherein S is a natural number greater than 1. For example, one resource element group may occupy 12 consecutive subcarriers in the frequency domain and 1 OFDM symbol in the time domain, where S is 12 and T is 1. The CCE is a basic unit of resources occupied by the PDCCH, and one PDCCH may occupy L CCEs, where a value of L may be 1, 2, 4, 8, or 16, and the value of L is also referred to as Aggregation Level (AL), for example, if one PDCCH occupies 4 CCEs, the AL of the PDCCH is referred to as 4. The larger the AL value used for transmission of the same DCI, the higher the reliability.

6) Subcarrier, one subcarrier is the smallest granularity in the frequency domain. For example, in LTE, the subcarrier width of 1 subcarrier may also be referred to as the subcarrier spacing of 15 kHz; in 5G, the subcarrier spacing may be 15kHz, 30kHz, 60kHz or 120 kHz.

7) Configuration: the method refers to that the network equipment sends configuration information to the terminal equipment, and the configuration information indicates certain content. The configuration information is carried in a high layer signaling, which may refer to a signaling sent by a high layer protocol layer, and the high layer protocol layer is at least one protocol layer above a physical layer. The higher layer protocol layer may specifically include at least one of the following protocol layers: a Medium Access Control (MAC) layer, a Radio Link Control (RLC) layer, a Packet Data Convergence Protocol (PDCP) layer, a Radio Resource Control (RRC) layer, and a non-access stratum (NAS) layer.

8) A time slot refers to a basic unit of time. In the embodiment of the present application, a slot may occupy 14 continuous symbols (normal cyclic prefix) or 12 continuous symbols (extended cyclic prefix) in the time domain. The symbols in the embodiment of the present application include, but are not limited to, Orthogonal Frequency Division Multiplexing (OFDM) symbols, Sparse Code Division Multiple Access (SCMA) symbols, Filtered Orthogonal Frequency Division Multiplexing (F-OFDM) symbols, or Non-Orthogonal Multiple Access (NOMA) symbols, which may be determined according to actual situations and are not described herein again.

9) The time window (span), is a unit of time shorter than the slot. A slot may include multiple spans. Each span is at least X consecutive OFDM symbols in length, X being an integer greater than 0.

10) A cell with scheduling capability is referred to as a scheduling cell in the embodiments of the present application, that is, a cell in which a terminal device receives a PDCCH is referred to as a scheduling cell, the PDCCH sent in the scheduling cell can schedule a Physical Uplink Shared Channel (PUSCH) or a Physical Downlink Shared Channel (PDSCH) in the cell, and the PDCCH can also send PDCCHs of other cells other than the cell in the scheduling cell, and schedule PDSCHs and PUSCHs in other cells. The scheduled cells refer to cells scheduled by the scheduled cells, that is, the scheduling information PDCCHs of these cells may be transmitted not in the own cell but in other cells. The method of the present application is described in the embodiments of the present application by taking each scheduling cell and a plurality of scheduled cells scheduled by the scheduling cell as examples. The scheduling cell may correspond to a primary cell Pcell among all downlink cells of CA, and the scheduled cell may correspond to a secondary cell, Pcell and Scell among all downlink cells of CA. Since not only the PDCCH of the local cell but also the PDCCH of the scheduled cell may be transmitted in the scheduling cell, the blind detection capability of the PDCCH in the scheduling cell needs to be larger, or in other words, in the scheduling cell, the blind detection capability is provided for different scheduling cells, that is, the PDCCH of the scheduled cell needs to be blind detected in the scheduling cell.

11) The terms "system" and "network" in the embodiments of the present application may be used interchangeably. In the embodiments of the present application, "a plurality" may also be understood as "at least two". "at least one" is to be understood as meaning one or more, for example one, two or more. For example, including at least one means including one, two, or more, and does not limit which ones are included, for example, including at least one of A, B and C, then including may be A, B, C, A and B, A and C, B and C, or a and B and C. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" generally indicates that the preceding and following related objects are in an "or" relationship, unless otherwise specified.

Unless stated to the contrary, the embodiments of the present application refer to the ordinal numbers "first", "second", etc., for distinguishing between a plurality of objects, and do not limit the sequence, timing, priority, or importance of the plurality of objects. For example, the first terminal device and the second terminal device, are only used for distinguishing different terminal devices, and are not used for limiting the functions, priorities, importance degrees, and the like of the two terminal devices.

Having described some of the concepts related to the embodiments of the present application, the following describes features of the embodiments of the present application.

Since the terminal device does not know the specific time-frequency resource position of the PDCCH in advance, PDCCH blind detection is required. Before the terminal equipment performs blind detection, the blind detection capability of the terminal equipment needs to be determined, and the PDCCH blind detection is performed based on the blind detection capability so as to ensure that the terminal equipment does not exceed the blind detection capability when performing the PDCCH. The blind detection capability determined by the terminal device is different for different application scenarios, which are described below.

In the first case, in a single carrier scenario:

the current protocol defines the blind detection capability of terminal equipment in a slot in a cell, that is, the number of maximum candidate PDCCHs that the terminal equipment can monitor and the number of maximum non-overlapping CCEs that the terminal equipment can monitor in a slot, that is, the number of candidate PDCCHs that the terminal equipment can perform blind detection at most in one slot. The latter represents the number of non-overlapping CCEs for which the terminal device performs channel estimation at most in one slot.

For example, table 1 shows the maximum number of PDCCH candidates that a terminal device can monitor in a slot in a cell with different subcarrier intervals defined by the current protocol, where μ represents the index of subcarrier interval (Sub-carrier spacing), and the index indicates that the corresponding subcarrier is 2^μX 15kHz, specifically, when the subcarrier spacing of a cell is 15kHz, the maximum number of PDCCH candidates that can be monitored in one slot is 44, and when the subcarrier spacing of a cell is 60kHz, the maximum number of PDCCH candidates that can be monitored in one slot is 22.

TABLE 1

μ	The maximum candidate PDCCH number which can be monitored by terminal equipment in one slot of one cell
0	44
1	36
2	22
3	20

Table 2 shows the maximum number of non-overlapping CCEs for which the terminal device performs channel estimation at most in one slot at different subcarrier intervals defined by the current protocol. μ in table 2 represents an index of a Sub-carrier spacing (Sub-carrier spacing) indicating that a corresponding Sub-carrier is 2^μX 15 kHz. When the terminal equipment blindly detects the PDCCH of a certain aggregation level, the terminal equipment carries out channel estimation on the position of the CCE occupied by the PDCCH of the aggregation level, and then can carry out PDCCH decoding. Assuming that the aggregation level is 2, channel estimation of 2 CCEs needs to be performed. From this perspective, the maximum number of non-overlapping CCEs can also be considered as the number of CCEs for the maximum channel estimation. And limiting the number of CCEs of the maximum channel estimation in one slot so as to limit the blind detection range of the terminal equipment. For example, according to table 2, when the subcarrier spacing of a cell is 15kHz, the maximum number of non-overlapping CCEs that can be channel estimated in one slot is 56; when the subcarrier spacing of a cell is 60kHz, the maximum number of non-overlapping CCEs that can be channel-estimated in one slot is 32.

TABLE 2

μ	Maximum non-overlapping CCE number for channel estimation of terminal equipment in slot
0	56
1	56
2	48
3	32

The terminal device may determine the blind detection capability in one slot according to table 1 and/or table 2, that is, determine the maximum number of PDCCH candidates and/or the maximum number of non-overlapping CCEs that can be blindly detected in one slot. When the terminal device performs blind detection, it needs to ensure that the number of PDCCH candidates for actual blind detection does not exceed the maximum number of PDCCH candidates shown in table 1 and/or ensure that the number of non-overlapping CCEs for actual blind detection does not exceed the number of non-overlapping CCEs shown in table 2.

In the second case, in the scenario of carrier aggregation:

at present, if the maximum number of cells supported by the terminal device is 4, that is, the terminal device supports 4 cells at most, and the network device sends the configuration information to the terminal device, the configuration information is configured

A downlink cell when

Then, or if the number of downlink cells which can be detected by the terminal device is reported to the network device

And the network equipment configures the terminal equipment with

A downlink cell when

In this case, the blind detection capability of the terminal device in one slot of the scheduling cell is the sum of the blind detection capabilities of all slots of all scheduled cells, that is, the blind detection capability of each scheduled cell in one slot is equal to the actual blind detection capability of the scheduled cell in one slot. Here, the first and second liquid crystal display panels are,

the subcarrier interval configured by the network equipment to the terminal equipment is 2^μX 15kHz number of downlink cells.

For example, the terminal device supports 4 downlink cells at most, the network device configures 3 downlink cells for the terminal device, where the subcarrier interval of 2 downlink cells in the 3 downlink cells is 15kHz, and the subcarrier interval of one downlink cell is 30kHz, when the terminal device schedules the 3 downlink cells in the scheduling cell, all of the 3 downlink cells are scheduled cells, and then one slot blind detection capability of the terminal device in the scheduling cell is the sum of the blind detection capability of one slot of the terminal device in two scheduled cells of 15kHz and the blind detection capability of one slot of 30kHz, that is, the blind detection capability of each scheduled cell in one slot is the blind detection capability of the scheduled cell in one slot. For example, it can be determined from table 2 that the maximum number of non-overlapping CCEs in a slot of a scheduled cell of 15kHz is 56, the maximum number of non-overlapping CCEs in a slot of a scheduled cell of 30kHz is 56, then on the scheduling cell, the maximum number of non-overlapping CCEs in a slot for each scheduled cell of 15kHz is 56, the maximum number of non-overlapping CCEs in a slot for the scheduled cell of 30kHz is 56, and the total number of largest non-overlapping CCEs in a slot on the scheduling cell is 56 × 2+ 56. For example, it can be determined from table 1 that the maximum number of PDCCH candidates for a 15kHz scheduled cell in a slot is 44, the maximum number of PDCCH candidates for a 30kHz scheduled cell in a slot is 36, then on the scheduling cell, the maximum number of PDCCH candidates for the 15kHz scheduled cell in a slot that the terminal device can monitor is 44, the maximum number of PDCCH candidates for the 30kHz scheduled cell in a slot is 36, and the total number of CCEs that do not overlap maximally in a slot on the scheduling cell is 44 × 2+ 36.

And if the terminal equipment reports the number of the downlink cells capable of detecting the PDCCH to the network equipment

And the network equipment is provided with

A downlink cell, and

the terminal device has an interval of 2 for all sub-carriers on the scheduling cell^μBlind detection capability of scheduled cell of multiplied by 15kHz in slot

Satisfies the following formula (1):

in the formula (1), the first and second groups,

meaning rounding down, applies equally hereinafter,

indicating a subcarrier spacing of 2^μThe maximum blind detection capability of each slot of each cell with a frequency of 15kHz may specifically be a value in table 1 or table 2, j represents an index of a subcarrier interval, and the subcarrier interval corresponding to j is 2^j×15Khz，

Indicating a subcarrier spacing of 2^jNumber of downlink cells x 15 kHz.

The terminal equipment has an interval of 2 for each subcarrier on the scheduling cell^μThe scheduled cell of x 15kHz, the blind detection capability of the terminal device is:

i.e. the blind detection capability for each scheduled cell does not exceed the blind detection capability of the scheduled cell itself.

For example, the terminal device reports to the network device that the terminal device can support 5 downlink cells, and the network device configures 6 downlink cells for the terminal device, where the subcarrier interval of 1 downlink cell is 15kHz, the subcarrier interval of 2 downlink cells is 60kHz, and the subcarrier interval of 3 downlink cells is 30kHz in the 6 downlink cells. If the terminal device schedules the 6 downlink cells in the scheduling cell, the 6 downlink cells are all scheduled cells, and the number of the scheduling cells is greater than the number of cells that the terminal device can support. Assuming that the blind detection capability is the maximum number of non-overlapping CCEs, the blind detection capability on the primary scheduling cell can be calculated according to the above formula (1) and table 2:

the blind detection capability for each slot of all 15kHz scheduled cells is: 5 × 56 × 1/6 ═ 46.67, and the lower round is taken, which is 46.

The capability per slot for all 30kHz scheduled cells is: and 5 × 56 × 3/6 ═ 140, which is the total blind detection capability of each slot of all scheduled cells at 30kHz, the terminal equipment needs to guarantee the blind detection capability of each slot of each scheduled cell is 56.

The capability per slot for all 60kHz scheduled cells is: 5 × 48 × 2/6 ═ 93, which is the total blind detection capability of each slot of all 60kHz scheduled cells, the terminal equipment needs to guarantee the blind detection capability of each slot of each scheduled cell is 48.

Therefore, on the primary scheduling cell, the scheduling capability of each slot is as follows: 46+140+93.

Assuming that the blind detection capability is the maximum number of candidate PDCCHs, the blind detection capability on the primary scheduling cell can be calculated according to the above formula (1) and table 1:

the blind detection capability for each slot of all 15kHz scheduled cells is: 5 44 1/6 is 36.67, rounded down to 46.

The capability per slot for all 30kHz scheduled cells is: 5 × 36 × 3/6 is 90, which is the total blind detection capability of each slot of all scheduled cells of 30kHz, and the terminal device needs to guarantee the blind detection capability of each slot of each scheduled cell to be 56.

The capability per slot for all 60kHz scheduled cells is: 5 22, 2/6, 36.67, rounded down to 36. This is the total blind detection capability of each slot of all scheduled cells of 60kHz, and the terminal device needs to guarantee the blind detection capability of each slot of each scheduled cell to be 48.

Therefore, on the primary scheduling cell, the scheduling capability of each slot is as follows: 36+90+36.

In the third case, in a single carrier scenario, the terminal device determines the blind detection capability within a span.

If there are 7 spans in a slot when the subcarrier interval of a cell is 15kHz, for example, the terminal device determines that the maximum number of non-overlapping CCEs of each span is 16, and the maximum number of non-overlapping CCEs in a slot is 16 × 7 — 112, compared to the first case where the maximum number of non-overlapping CCEs defined in each slot is defined as 56 in a single carrier scenario, the maximum number of non-overlapping CCEs supported in a slot is doubled, which is equivalent to increasing the capability of blind detection, so that it can be ensured that a PDCCH can be transmitted with a larger aggregation level, that is, can occupy more CCEs, and thus the reliability of the PDCCH can be improved and the reliability of the service can be ensured.

The following is divided into several steps to describe how the terminal device determines the blind detection capability of each span of each cell in a single carrier scenario. The following steps are applicable for each cell.

The method comprises the following steps: and the terminal equipment reports the span patterns and the blind detection capability corresponding to each span pattern.

Table 3 shows the pattern definitions that list the span, and the blind detection capability that each span pattern corresponds to at each span.

TABLE 3

In table 3, a plurality of span patterns may be included, where each row in table 3 represents a span pattern, the ith row represents the ith span pattern, each span pattern corresponds to a set of parameters (X, Y) and a second blind detection capability C^i,μThe second blind detection capability subcarrier spacing is 2^μThe maximum number of non-overlapping CCEs per span or the maximum number of PDCCH candidates per span corresponding to the ith span pattern of x 15 kHz.

For eachThe parameters (X, Y) corresponding to rows, e.g. row i, refer to: the terminal device can support one span divided by every Y symbols at maximum, and the minimum interval between two adjacent spans is X symbols, that is, the span determined by the terminal device cannot be too dense, the interval cannot be smaller than X, the span cannot be too long, and the length cannot be larger than Y. Second blind detection capability C corresponding to span pattern of ith row^i,μIf the span pattern determined by the terminal equipment conforms to the span pattern of the ith row, the blind detection capability corresponding to each span of the terminal equipment is C^i,μSpecifically, after the span pattern and the subcarrier spacing of the cell are determined, the second blind detection capability corresponding to a certain span pattern of the subcarrier spacing is a fixed value. Here, too, the blind detection capability may refer to the maximum number of non-overlapping CCEs and/or the maximum number of candidate PDCCHs.

In order to ensure that the actual PDCCH blind detection capability of the terminal device does not exceed the maximum blind detection capability of the terminal device, the terminal device reports one or more rows in table 3 to the network device. Table 3 lists only 3 kinds of span patterns, and actually, a plurality of span patterns may be included, and the value may be 0 or 1. In this embodiment, the value is 0, 1, 2 or 3, there are 3 span patterns, and the corresponding parameters are (2, 3), (4, 3) or (7, 3), respectively, which are only examples for understanding the technical solution of the present invention, and the present invention includes but is not limited to the above solutions.

Step two: the terminal device determines the span pattern (pattern) that is actually to be detected blindly.

And the network equipment receives the span patterns reported by the terminal equipment in the step one and the blind detection capability corresponding to each span pattern. In the future, some information is configured for the terminal device to perform PDCCH blind detection, and the configuration information is sent to the terminal device. Accordingly, the terminal device receives the configuration information.

The configuration information may include a blind detection period of the PDCCH, one or more control resource sets (CORESET), and/or multiple search spaces, etc. The CORESET may specify a frequency domain location where the PDCCH is located and a number of time domain symbols. Each search space may be associated with a CORESET, and each search space may specify a search space identifier, a search space type and/or an aggregation level, and the number of PDCCH candidates for each aggregation level, a period of the search space, an offset, a blind detection start symbol, and the like, where the offset refers to a specific slot in the search space period. Therefore, the terminal device may determine the blind detection timing of the PDCCH according to the configuration information, which may also be referred to as PDCCH occasting.

The procedure for determining PDCCH occase is as follows: in the above configuration information, it is assumed that the number of symbols of the CORESET associated with the search space is 3 symbols, the period is a slot unit, such as 2 slots, and the offset is, for example, the 2 nd slot in the period of the search space. Usually, the number of symbols contained in a slot is fixed, for example, 14. To facilitate the determination of the positions of the symbols, the numbers "0-13" or "1-14" may be used to indicate the positions of 14 symbols in one slot. For convenience of explanation, the positions of 14 symbols in one slot are illustrated with the numbers "0-13" in this application.

The blind detection start symbol, that is, the specific positions in the slot determined by the offset are used for PDCCH blind detection, that is, the start symbol position indicating the PDCCH blind detection timing, may be indicated by a 14-bit bitmap (bitmap), for example, the bitmap of 14bit is 10101010101010101010, that is, the PDCCH blind detection needs to be performed at the positions of 1 st, 3 th, 5 th, 7 th, 9 th, 11 th, and 13 th symbols in one slot. Assuming that the period is 2 slots, the offset is 2 slots, the CORESET is 3 symbols, and the bitmap of 14 bits is 10001000100000, the PDCCH occasion of slots 0-slots 4 is shown in FIG. 1. There are 3 PDCCH occases in slot1 and slot3, respectively, where the first PDCCH occase in slot1 is symbol 0 to symbol 2, the second PDCCH occase is symbol 4 to symbol 6, and the third PDCCH occase is symbol 8 to symbol 10. The shaded portion in fig. 1 illustrates PDCCH occasting.

After the terminal device determines the PDCCH occase, the terminal device determines the actual span pattern according to the PDCCH occase. The specific process is as follows:

the terminal device first determines a bitmap, which is assumed to be a 14bit (bit) bitmap. In the 14-bit bitmap, a position with a value of 1 indicates that there is a PDCCH occasion, and except for the position with the value of 1, other positions have values of 0. As shown in fig. 1, assuming that a PDCCH occase determined by the terminal device is as that in slot1 of fig. 1, the determined 14-bit bitmap is: 11101110111000. the bitmap starts from the first symbol of 1, and determines the length of span, that is, the number of symbols occupied by span, as: max (number of CORESET symbols, min (y)), that is, the number of span symbols: and the number of CORESET symbols is the maximum value in the minimum Y values of all parameters (X, Y) corresponding to all span patterns reported by the terminal equipment, and the length of each span is the length. After the first span is determined, the position of the first 1 in the bitmap which is not covered by the symbol occupied by the first span is found, the second span is determined, namely the second span is after the first span, the actual span pattern of the terminal device is determined from the first 1 symbol, and so on.

For example: the terminal device receives configuration information, the configuration information configures 2 CORESET as CORESET1 and CORESET2 respectively, where CORESET1 is 1 symbol, CORESET2 is 2 symbols, and CORESET1 is associated with 2 search spaces, determines that the corresponding PDCCH occase of the search space 1 is shaded 1 in fig. 2, determines that the corresponding PDCCH occase of the search space 2 is shaded 2 in fig. 2, and CORESET2 is associated with 1 search space, and determines that the corresponding PDCCH occase of the search space 2 is shaded 3 in fig. 2 according to the foregoing method, so that the terminal device can determine that a 14-bit bitmap is 01100110010100, as shown in shaded 4 in fig. 2.

In the first step, it is assumed that the parameters (X, Y) corresponding to the 3 span patterns reported by the terminal device are (2, 2), (4, 3), and (7, 3), respectively. The number of symbols of each span determined according to the above steps is max (number of CORESET symbols), min (y) ═ max (2, 2) ═ 2, for example, it is determined in the 14-bit bitmap 01100110010100 that the first span is 1 is at the symbol 1, the first span starts from the symbol 1 and has a length of 2 symbols, that is, the first span is from the symbol 1 to the symbol 2, and the second span starts from the symbol 5 and has a length of 2 symbols, that is, the second span is from the symbol 5 to the symbol 6. By analogy, the third span is symbol 9 to symbol 10, and the fourth span is symbol 11 to symbol 12.

Step two: the terminal device determines the blind detection capability of each span.

The terminal device determines an actual span pattern, and can determine the blind detection capability of each span according to the actual span pattern.

For example, the terminal device determines that some parameters (X, Y) corresponding to the span pattern among the parameters (X, Y) corresponding to the reported span pattern are closest to the determined parameters (X ', Y') corresponding to the actual span pattern, that is, determines that the actual span pattern and which reported span pattern best meet, and then defines the reported span pattern as a legal span pattern. And determining the blind detection capability of each span as the second blind detection capability corresponding to the legal span pattern. And if a plurality of legal span patterns exist, defining the maximum value of the second blind detection capability corresponding to the legal span patterns as the blind detection capability of each span.

How to determine the actual span pattern and which reported span pattern best fit, i.e., how to determine the legal span pattern, is described below.

The number of symbols of the largest span that can be supported in the actual span pattern is Y ', and the minimum value of the interval between 2 adjacent spans is defined as X'. And if the parameters (X, Y) corresponding to the reported span pattern meet the condition that X is less than or equal to X 'and Y is greater than or equal to Y', determining the span pattern legal by the span pattern.

For example, in fig. 2, the terminal device actually determines a span pattern, where the span pattern includes 4 spans, and the number of symbols of each span in the 4 spans is 2, so that Y' is determined to be 2. The 4 spans are sequentially defined as a first span, a second span, a third span and a fourth span, wherein the interval between the second span and the first span is 4 symbols, the interval between the third span and the second span is 4 symbols, and the interval between the fourth span and the third span is 2 symbols, so that the minimum value of the interval is determined to be 2, that is, X' is 2. And parameters (X, Y) corresponding to the first span pattern (2, 2) in the reported span patterns meet the condition that X is less than or equal to X ', Y is greater than or equal to Y', so that the first span pattern is a legal span pattern. And parameters (X, Y) corresponding to the second span pattern (4, 3) in the reported span patterns do not satisfy that X is less than or equal to X ', and satisfy that Y is greater than or equal to Y', so that the second span pattern is not a legal span pattern. And parameters (X, Y) corresponding to the third span pattern (7, 3) in the reported span patterns do not satisfy that X is less than or equal to X ', and satisfy that Y is greater than or equal to Y', so that the third span pattern is not a legal span pattern. And the terminal equipment determines an actual span pattern, and determines that the blind detection capability of each span is equal to the second blind detection capability corresponding to the span pattern with the parameter (2, 2) in the reported span pattern according to the span pattern.

Assuming that the subcarrier spacing of the cell at this time is 15kHz, the blind detection capability of each span is determined to be C according to table 3^1,0. For example, if only one span exists in the actual span pattern according to the second step, Y 'in the parameters corresponding to the span pattern is determined to be the number of symbols of the span, and X' is infinite.

In the third case, the terminal device supports single carrier and blind detection capability of each span of each cell. If the terminal device supports multiple carriers, the terminal device needs to detect PDCCHs of multiple scheduling cells in the scheduling cell, which requires the terminal device to have a greater blind detection capability in each span of the scheduling cell, i.e., the terminal device needs to detect more candidate PDCCHs in each span or have more CCEs for channel estimation.

In view of this, the technical solutions of the embodiments of the present application are provided. According to the embodiment of the application, under the scene of carrier aggregation, the blind detection capability of the terminal equipment in each span of each scheduling cell can be determined. Meanwhile, the blind detection capability of each span of the scheduling cell is increased, namely the terminal equipment has higher blind detection capability, so that the time delay and the reliability of the service are ensured. Meanwhile, all downlink cells can be scheduled normally in a cross-carrier scheduling scene.

The technical scheme provided by the embodiment of the application can be used for wireless communication systems, such as 4.5G systems or 5G systems, further evolution systems based on LTE or NR, future wireless communication systems or other similar communication systems and the like.

Please refer to fig. 3, which illustrates a network architecture applied in the present embodiment. Fig. 3 includes a network device and 6 terminal devices, which 6 terminal devices may be cellular phones, smart phones, laptops, handheld communication devices, handheld computing devices, satellite radios, global positioning systems, PDAs, and/or any other suitable device for communicating over a wireless communication system, and each may be connected to the network device. The six terminal devices are each capable of communicating with the network device. For example, the terminal device may be a narrowband terminal device, such as an mtc terminal device; the terminal device may be a broadband terminal device, for example, an NR terminal device of existing version (release) 15. Of course, the number of terminal devices in fig. 3 is only an example, and may be fewer or more.

The network device in fig. 3 may be a base station. The network device may correspond to different devices in different systems, for example, the fourth generation mobile communication technology (4G) system may correspond to the eNB, and the 5G system may correspond to the gNB.

The Network architecture applied in the embodiment of the present application may also be a Public Land Mobile Network (PLMN) Network, a device-to-device (D2D) Network, a machine-to-machine (M2M) Network, an IoT Network, or other networks.

The technical solution provided by the embodiments of the present application is described below with reference to the accompanying drawings.

In the following description, the method is applied to the network architecture shown in fig. 3 as an example. In addition, the method may be performed by two communication devices, e.g. a first communication apparatus and a second communication apparatus. The first communication device may be a network device or a communication device capable of supporting a network device to implement the functions required by the method, or the first communication device may be a terminal device or a communication device (e.g., a system-on-chip) capable of supporting a terminal device to implement the functions required by the method. The same is true for the second communication apparatus, which may be a network device or a communication apparatus capable of supporting the network device to implement the functions required by the method, or the second communication apparatus may be a terminal device or a communication apparatus (e.g., a system-on-chip) capable of supporting the terminal device to implement the functions required by the method. And the implementation manners of the first communication device and the second communication device are not limited, for example, the first communication device and the second communication device are both terminal devices, or the first communication device is a terminal device, and the second communication device is a communication device capable of supporting the terminal device to implement the functions required by the method, and so on. The network device is, for example, a base station.

Referring to fig. 4, a flowchart of a communication method provided in an embodiment of the present application is shown, and in the following description, the method is executed by a network device and a terminal device, that is, a first communication device is a terminal device, and a second communication device is a network device. For example, if the method is applied to the network architecture shown in fig. 3, the first communication device may be any one of the 6 terminal devices shown in fig. 3, and the second communication device may be the network device shown in fig. 3. It should be noted that the embodiment of the present application is only an example implemented by a network device and a terminal device, and is not limited to this scenario.

S401, the network equipment sends first indication information to the terminal equipment, and the terminal equipment receives the first indication information, wherein the first indication information is used for indicating the number of downlink cells.

S402, the terminal equipment determines the first blind detection capability of the scheduling cell according to the number of the downlink cells indicated by the first indication information.

S403, the network equipment sends the PDCCH in the scheduling cell.

S404, the terminal device performs PDCCH blind detection in the scheduling cell according to the first blind detection capability.

The terminal equipment in the embodiment of the application can support single carrier and also can support multiple carriers. Therefore, when the terminal device supports multiple carriers, that is, when carrier aggregation exists, the network device needs to notify the terminal device of the number of downlink cells configured for the terminal device. Specifically, the network device may indicate the number of downlink cells configured for the terminal device through the first indication information.

For example, the first indication information may be carried in higher layer signaling or Downlink Control Information (DCI).

In order to receive DCI carried in a PDCCH, a terminal device needs to perform blind detection on the PDCCH. When the terminal device performs blind detection on the PDCCH, it needs to be ensured that the blind detection capability of the terminal device is not exceeded.

If the blind detection capability of the terminal device is defined to be strong, for example, the number of the CCEs which can be detected by the terminal device in a period of time is defined to be large, so that the operation complexity of the terminal device is high, and the cost of the terminal device is high. And the terminal equipment monitors more CCE numbers, and the power consumption overhead of the terminal equipment for detecting the PDCCH is also increased. Therefore, a lower blind detection capability can be defined for the terminal device to reduce the operation complexity and cost of the terminal device. However, if the blind detection capability of the terminal device is low, the network device may not perform real-time service scheduling, or may not use a large aggregation level to schedule the PDCCH, and thus cannot ensure low-delay and highly reliable service transmission.

Therefore, the blind detection capability of the terminal device needs to be defined reasonably to meet the requirements of low delay and high reliability of the service. The blind detection capability of the terminal device in the three cases is currently defined, but there is no definition on how to determine the blind detection capability of the terminal device in each span in the CA scenario.

In the embodiment of the application, under a carrier aggregation scenario, blind detection capability, such as first blind detection capability, of the terminal device in each span of each scheduling cell can be determined. The first blind detection capability here is the maximum number of non-overlapping CCEs per span or the maximum number of PDCCH candidates per span. The terminal device may determine the first blind detection capability of the scheduling according to the number of the downlink cells, or may determine the first blind detection capability of the terminal device in a certain downlink cell. Since it is aimed at the CA scenario, then at least two cells, namely the scheduling cell and the tuned cell, are involved. For convenience of description, how to determine the first blind detection capability of the terminal device according to the number of downlink cells is described below by taking the determination of the first blind detection capability of the terminal device in the scheduling cell as an example.

In some embodiments, the first blind detection capabilities of the determined terminal device in the scheduling cell are all different according to the difference between the number of cells that the terminal device can support and the difference between the number of downlink cells configured for the terminal device by the network device.

It is assumed here that the number of carriers that the terminal device can support is a first number. The first value may be actively reported by the terminal device, so that the network device may refer to the first value when indicating the number of downlink cells through the first indication information, where the first value indicates the number of downlink cells in which the terminal device can perform blind detection on the PDCCH, and the network device ensures that the configured blind detection times of the PDCCH and the configured number of non-overlapping CCEs do not exceed the number of downlink cells in which the terminal device can perform blind detection on the PDCCH as much as possible. The first value may also be a value predefined by a protocol, and the network device may refer to the first value predefined by the protocol when the network device indicates the number of downlink cells through the first indication information. For example, the predefined first value is 4, and the first value represents the number of downlink cells in which the terminal device can perform blind detection on the PDCCH. Therefore, the configured PDCCH blind detection times and the configured number of non-overlapping CCEs are ensured to be not more than the number of downlink cells capable of blindly detecting the PDCCH by the terminal equipment as much as possible.

The following steps of determining the first blind detection capability of the terminal device in the scheduling cell from the angle of the relative size between the number of the downlink cells and the first value, specifically may include the following steps:

in the first case: the number of downlink cells is less than or equal to a first value.

For example, the number of the cells supported by the terminal device at the maximum is greater than or equal to the number of the downlink cells configured for the terminal device by the network device. Illustratively, the first value is 4, that is, the terminal device supports 4 cells or more than 4 cells at maximum, and the number of downlink cells configured for the terminal device by the network device is less than or equal to 4.

For the number of downlink cells being less than or equal to the first value, the first blind detection capability of the terminal device in the determined scheduling cell may be one of the following capabilities. In the following example, assume that the first value is 6, specifically:

the first capability, that is, the first blind detection capability of the terminal device in the scheduling cell, is the sum of the first blind detection capabilities of each of all the scheduled cells. Or in other words, the blind detection capability of the terminal device in the scheduling cell for each scheduling cell is the first blind detection capability of the scheduling cell.

For example, please refer to fig. 5, which is a schematic diagram of the first blind detection capability of the terminal device in 5 downlink cells. As shown in fig. 5, there are 5 cells, which are cell 1, cell 2, cell 3, cell 4, and cell 5. The subcarrier spacing for cell 1, cell 2 and cell 3 is 15kHz and the subcarrier spacing for cell 4 and cell 5 is 30 kHz. Assume that the span patterns reported by the terminal device are (4, 3), and (7, 3). According to Table 3, the corresponding blind detection capability at 15kHz is C^2,0And C^2,1The corresponding blind detection capability at 30kHz is C^3,0And C^3,1. Hypothesis C^2,1>C ^2,0,C ^3,1>C ^3,0。

For cell 1, assuming that an actual span pattern can be determined as shown in fig. 5 according to step two in case three, and one slot includes 3 spans, according to step three in case three, it can be determined that the first blind detection capability of cell 1 at each span is C^2,0(ii) a Similarly, for cell 2, it can be determined that the actual span pattern is shown in fig. 5, where 1 span is included in one slot, and cell 2 has a span in each spanThe first blind detection capability is C^2,1(ii) a For cell 3, it can be determined that the actual span pattern is shown in fig. 5, which includes 2 spans in one slot, and the first blind detection capability of cell 3 at each span is C^2,1(ii) a For cell 4, it may be determined that the actual span pattern is as shown in fig. 5, where 1 span is included in one slot, and the first blind detection capability of cell 4 at each span is C^3,1(ii) a For cell 5, it may be determined that the actual span pattern is as shown in fig. 5, where 2 spans are included in one slot, and the first blind detection capability of cell 5 at each span is C^3,0。

For example, assuming that the scheduling cell is cell 1, and the scheduled cells are cell 1 and cell 3, all the scheduled cells are cell 1 and cell 3, and the first blind detection capability of the terminal device in the scheduling cell is C^2,0+C ^2,1(ii) a For another example, if the scheduling cell is cell 1, and the scheduled cells are cell 1 and cell 4, then all the scheduled cells are cell 1 and cell 4, and the first blind detection capability of the terminal device in the scheduling cell is C^2,0+C ^3,1. As can be seen, the blind detection capability of the terminal device in the scheduling cell increases with the increase of the number of the scheduled cells, so that the first blind detection capability of the scheduling cell can be increased. Correspondingly, if the scheduling cell is cell 1, the scheduled cells are cell 1 and cell 3, the first blind detection capability of the terminal device on the scheduling cell for the scheduled cell 1 is the first blind detection capability of the cell 1, and the first blind detection capability of the terminal device on the scheduling cell for the scheduled cell 3 is the first blind detection capability of the cell 3; if the scheduling cell is cell 1, the scheduled cells are cell 1 and cell 4, the first blind detection capability of the terminal device on the scheduling cell for the scheduled cell 1 is the first blind detection capability of the cell 1, and the first blind detection capability of the terminal device on the scheduling cell for the scheduled cell 4 is the first blind detection capability of the cell 4. Therefore, under the cross-carrier scheduling scene, the terminal device can be ensured to have enough first blind detection capability in the scheduling cell to perform blind detection on the PDCCH of the scheduled cell, so that the low time delay and high reliability of the service in the scheduled cell are ensured.

The second capability, that is, the first blind detection capability of the terminal device in the scheduling cell is the product of the maximum value of the first blind detection capabilities in all the scheduled cells and the number of the scheduled cells. In other words, the first blind detection capability of the scheduling cell for each scheduling cell is the maximum value of the first blind detection capabilities in all the scheduled cells.

For example, continuing to refer to fig. 5, assuming that the scheduling cell is cell 1 and the scheduled cells are cell 1 and cell 3, then all of the scheduled cells are cell 1 and cell 3. The maximum value of the first blind detection capability in all scheduled cells is C2 ═ max (C^2,0,C ^3,1) Then the first blind detection capability C of the terminal device in the scheduling cell is C2 × 2. That is, the first blind detection capability of the scheduling cell for cell 1 and cell 3 is C2. As can be seen, the blind detection capability of the terminal device in the scheduling cell increases in proportion to the number of the scheduled cells, so that the first blind detection capability of the scheduling cell can be increased. Under the scene of cross-carrier scheduling, the terminal equipment can be ensured to have enough first blind detection capability in the scheduling cell to carry out blind detection on the PDCCH of the scheduled cell, so that the low time delay and high reliability of services in the scheduled cell are ensured.

The third capability, that is, the first blind detection capability C of the terminal device in the scheduling cell, is:

wherein j represents the index of the subcarrier spacing, and the subcarrier spacing corresponding to j is 2^j×15kHz，K ^jIndicating subcarrier spacing of 2 in all scheduled cells^jMaximum value of first blind detection capability, L, for scheduled cell of x 15kHz^jSubcarrier spacing of 2 for all scheduled cells^jThe number of scheduled cells multiplied by 15kHz, J is a positive integer. In other words, the interval is 2 per subcarrier in the scheduling cell^jThe first blind detection capability of the scheduled cell multiplied by 15kHz is all between subcarriersPartition is 2^jMaximum value of first blind detection capability of scheduled cell x 15 kHz.

Illustratively, continuing with FIG. 5, j is either 0 or 1. All scheduled cells are cell 1, cell 2, cell 3, cell 4 and cell 5. Assuming that the scheduling cell is cell 1, for scheduling cells with subcarrier spacing of 15kHz, i.e., cell 1 to cell 3, when j is 0, K is^jIs max (C)^2,0，C ^2,1，C ^2,1)＝C ^2,1，L ^j3, there are 3 cells, then for each scheduling cell with a subcarrier spacing of 15kHz, the first blind detection capability C of the scheduling cell^2,1(ii) a When j is 1, K is used for scheduling cells with subcarrier spacing of 30kHz, namely cell 4 and cell 5^jIs max (C)^3,0，C ^3,1)＝C ^3,1，L ^j2, there are 2 cells, the first blind detection capability C of the scheduling cell is for each scheduling cell with a subcarrier spacing of 30kHz^3,1(ii) a That is, the first blind detection capability of the scheduling cell is C ═ C^2,1×3+2×C ^3,1. It can be seen that in the scheduling cell, the spacing for subcarriers is 2^jThe first blind detection capability of the scheduled cell multiplied by 15kHz is the product of the maximum first blind detection capability of the scheduled cell at the subcarrier interval in all the scheduled cells and the number of the scheduled cells at the subcarrier interval, so that the terminal equipment is ensured to have the maximum first blind detection capability to perform blind detection on the PDCCH of the scheduled cell in each subcarrier interval, and the low delay and high reliability of the service in the scheduled cell are ensured.

A fourth capability, where the first blind detection capability of the terminal device in the scheduling cell is:

wherein j represents the index of the subcarrier spacing, and the subcarrier spacing corresponding to j is 2^j×15kHz，K ^jTo representSubcarrier spacing of 2 in all scheduled cells^jMinimum value of first blind detection capability, L, of scheduled cell of x 15kHz^jSubcarrier spacing of 2 for all scheduled cells^jThe number of scheduled cells multiplied by 15kHz, J is a positive integer.

Illustratively, continuing with FIG. 5, j is either 0 or 1. All scheduled cells are cell 1, cell 2, cell 3, cell 4 and cell 5. Assuming that the scheduling cell is cell 1, for scheduling cells with subcarrier spacing of 15kHz, i.e., cell 1 to cell 3, when j is 0, K is^jIs min (C)^2,0，C ^2,1，C ^2,1)＝C ^2,0，L ^j3, there are 3 cells, then for each scheduling cell with a subcarrier spacing of 15kHz, the first blind detection capability C of the scheduling cell^2,0(ii) a When j is 1, K is used for scheduling cells with subcarrier spacing of 30kHz, namely cell 4 and cell 5^jIs min (C)^3,1，C ^3,0)＝C ^3,0，L ^j2, there are 2 cells, the first blind detection capability C of the scheduling cell is for each scheduling cell with a subcarrier spacing of 30kHz^3,0(ii) a That is, the first blind detection capability of the scheduling cell is C ═ C^2,0×3+2×C ^3,0. It can be seen that in the scheduling cell, the subcarrier spacing is 2^jThe first blind detection capability of the scheduled cell multiplied by 15kHz is the product of the minimum first blind detection capability of the scheduled cell at the subcarrier interval and the number of the scheduled cells at the subcarrier interval, so that it is ensured that for the scheduled cell at each subcarrier interval, the terminal equipment has the minimum first blind detection capability to blindly detect the PDCCH of the scheduled cell, and thus it is ensured that the first blind detection capability of the terminal equipment at the scheduling cell is not too large (i.e. normal scheduling of the scheduled cell is ensured) in a carrier aggregation scene, and power loss of the terminal equipment is reduced.

In the second case: the number of downlink cells is greater than a first value.

For the number of downlink cells greater than the first value, the first blind detection capability in the scheduling cell determined by the terminal device may be one of the following capabilities. In the following example, the first value is assumed to be 4.

A fifth capability, where the first blind detection capability of the terminal device in the scheduling cell is:

wherein j represents the index of the subcarrier spacing, and the subcarrier spacing corresponding to j is 2^j×15kHz，K ^jIndicating subcarrier spacing of 2 in all scheduled cells^jMaximum value of first blind detection capability, L, for scheduled cell of x 15kHz^jSubcarrier spacing of 2 for all scheduled cells^jThe number of the scheduled cells multiplied by 15kHz, J is a positive integer, N is the number of the scheduling cells, and M is the number of the downlink cells. In other words, the scheduling cell is 2 for subcarrier spacing^jThe first blind detection capability of a scheduling cell of x 15kHz is

It should be noted that, here, rounding-down is taken as an example, rounding-up or rounding-down may also be taken, and the following also applies, and the present embodiment is not limited thereto.

Illustratively, continuing with FIG. 5, j is either 0 or 1. All scheduled cells are cell 1, cell 2, cell 3, cell 4 and cell 5. N is 4, M is 5.

When j is 0, K is for a scheduling cell with subcarrier spacing of 15kHz^jIs max (C)^2,0，C ^2,1，C ^2,1)＝C ^2,1，L ^jIf there are 3 cells, then for all scheduling cells with carrier spacing of 15kHz, the first blind detection capability of the scheduling cell is

When j is 1, K is used for scheduling cells with subcarrier spacing of 30kHz, namely cell 4 and cell 5^jIs max (C)^3,1，C ^3,0)＝C ^3,1，L ^jWith 2, there are 3 cells, the first blind detection capability of the scheduling cell is for all scheduling cells with carrier spacing of 30kHz

I.e., the first blind detection capability of the scheduling cell is

Because the number of downlink cells is greater than the first value, that is, the number of configured downlink cells is greater than the number of cells capable of supporting blind detection by the terminal device, at this time, if the subcarrier spacing of all the scheduled cells is still 2^j×15kHz，K ^jIndicating subcarrier spacing of 2 in all scheduled cells^jMaximum value of first blind detection capability of scheduled cell of x 15kHz, then maximum first blind detection capability for this subcarrier spacing should be N x K^jHowever, the number of scheduling cells actually spaced by the subcarrier is L^jOnly occupy all downlink cells

Thus, the spacing is 2 for subcarriers^jThe total first blind detection capability of the scheduling cell of x 15kHz is

I.e. calculate the childAnd then, the same mode is adopted for the scheduled cells with the sub-carrier intervals, so that the blind detection capability of all the scheduled cells in the scheduling cell is calculated to be the sum of the maximum first blind detection capabilities of all the scheduled cells with all the sub-carrier intervals. Therefore, the first blind detection capability of the scheduling cell is not increased in proportion according to the increase of the number of downlink cells without limit, but is limited by the number of the blind detection cells which can be supported by the terminal equipment, the maximum blind detection capability which can be supported by the terminal equipment is divided into the downlink cells which are actually scheduled by the terminal equipment, and therefore the first blind detection capability of the finally determined scheduling cell is ensured not to exceed the blind detection capability which can be supported by the terminal equipment, the power consumption of the terminal equipment is reduced, and the complexity is realized.

A sixth capability, where the first blind detection capability of the terminal device in the scheduling cell is:

wherein j represents the index of the subcarrier spacing, and the subcarrier spacing corresponding to j is 2^j×15kHz，K ^jIndicating subcarrier spacing of 2 in all scheduled cells^jMinimum value of first blind detection capability, L, of scheduled cell of x 15kHz^jSubcarrier spacing of 2 for all scheduled cells^jThe number of the scheduled cells multiplied by 15kHz, J is a positive integer, N is a first numerical value, and M is the number of downlink cells.

When j is 0, K is for a scheduling cell with subcarrier spacing of 15kHz^jIs min (C)^2,0，C ^2,1，C ^2,1)＝C ^2,0，L ^j3, there are 3 cells, then for all subcarrier spacingsIs a 15kHz scheduling cell, the first blind detection capability of the scheduling cell is

When j is 1, K is used for scheduling cells with subcarrier spacing of 30kHz, namely cell 5 and cell 4^jIs min (C)^3,0，C ^3,1)＝C ^3,0，L ^jWith 2, there are 3 cells, then for a scheduling cell with a subcarrier spacing of 30kHz, the first blind detection capability of the scheduling cell is

That is, the first blind detection capability of the scheduling cell is

Since the number of downlink cells is greater than the first value, that is, the number of configured downlink cells is greater than the number of cells capable of supporting blind detection by the terminal device, at this time, it is assumed that the subcarrier intervals of all the scheduled cells are 2^j×15kHz，K ^jIndicating subcarrier spacing of 2 in all scheduled cells^jX 15kHz minimum of the first blind detection capability of the scheduled cell, then the minimum first blind detection capability for this subcarrier spacing should be N x K^jHowever, the number of scheduling cells actually spaced by the subcarrier is L^jOccupying only all downlink cells

The minimum first blind detection capability of all the scheduled cells in the subcarrier interval is calculated, and then the same mode is adopted for the scheduled cells in the subcarrier interval, so that the blind detection capability of all the scheduled cells is calculated to be the sum of the minimum first blind detection capability of all the scheduled cells in all the subcarrier intervals. Therefore, the first blind detection capability of the scheduling cell is not increased in proportion according to the increase of the number of downlink cells without limit, but is limited by the number of the blind detection cells which can be supported by the terminal equipment, the blind detection capability which can be supported by the terminal equipment is divided into the downlink cells which are actually scheduled by the terminal equipment, and therefore the first blind detection capability of the finally determined scheduling cell is ensured not to exceed the blind detection capability which can be supported by the terminal equipment, the power consumption of the terminal equipment is reduced, and the complexity is realized.

The seventh capability is that the first blind detection capability of the terminal equipment in the scheduling cell is

Wherein j represents the index of the subcarrier spacing, and the subcarrier spacing corresponding to j is 2^jX 15kHz, J is a positive integer, L^jSubcarrier spacing of 2 for all scheduled cells^jThe number of the scheduled cells multiplied by 15kHz, M is the number of downlink cells; q^jIs equal to

Wherein i is the index of the span pattern, H is the number of the span patterns,

number of downlink cells corresponding to span pattern with index i, CⁱIndicating a second blind detection capability for the span pattern with index i.

The second blind detection capability is the blind detection capability corresponding to each span pattern that is reported by the terminal device when reporting the span pattern to the network device, and the second blind detection capability is the maximum number of non-overlapping CCEs of each span corresponding to each span pattern, or the second blind detection capability is the number of maximum candidate physical downlink control channels PDCCH of each span corresponding to each span pattern.

For example, please continue to refer to fig. 5, assume that the span patterns reported by the terminal device are (4, 3), and (7, 3). According to Table 3, the corresponding blind detection capability at 15kHz is C^2,0And C^2,1The corresponding blind detection capability at 30kHz is C^3,0And C^3,1. Hypothesis C^2,1>C ^2,0，C ^3,1>C ^3,0And the number of downlink cells corresponding to the 15kHz span patterns (4, 3) reported by the terminal equipment is 2, and the number of downlink cells corresponding to the 15kHz span patterns (7, 3) reported by the terminal equipment is 1. The number of downlink cells corresponding to the span patterns (4, 3) of 30kHz reported by the terminal equipment is 1, and the number of downlink cells corresponding to the span patterns (7, 3) of 30kHz reported by the terminal equipment is 1.

When j is 0, Q^jIs C^2,0×2+C ^2,1，L ^jFor a scheduling cell with 15kHz spacing for all subcarriers, the first blind detection capability of the scheduling cell is 3

When j is 1, Q is for scheduling cells with subcarrier spacing of 30kHz, i.e., cell 4 and cell 5^jIs C^3,0+C ^3,1，L ^j＝2，Then for all scheduling cells with subcarrier spacing of 30kHz, the first blind detection capability of the scheduling cell is

That is, the first blind detection capability of the scheduling cell is

With this scheme, the subcarrier spacing is 2^jThe second blind detection capability corresponding to the span pattern with index i multiplied by 15kHz, that is, the subcarrier interval reported by the terminal equipment is 2^jBlind detection capability per span pattern of x 15kHz, determining subcarrier spacing of 2^jAnd the first blind detection capability of the scheduling cell multiplied by 15kHz is obtained, and then the blind detection capabilities of the scheduling cells at all subcarrier intervals are summed to obtain the small scheduling blind detection capability. Under the scene of carrier aggregation, the first blind detection capability of the scheduling cell is not increased in proportion according to the increase of the number of downlink cells without limit, but is limited by the number of the blind detection cells which can be supported by the terminal equipment, and the blind detection capability which can be supported by the terminal equipment is divided into the downlink cells which are actually scheduled by the terminal equipment, so that the first blind detection capability of the finally determined scheduling cell is ensured not to exceed the blind detection capability which can be supported by the terminal equipment, the power consumption of the terminal equipment is reduced, and the complexity is realized.

S403, the network equipment sends the PDCCH in the scheduling cell.

S404, the terminal equipment performs PDCCH blind detection in the scheduling cell according to the first blind detection capability.

The terminal device may perform blind detection of the PDCCH in the scheduling cell according to the determined first blind detection capability, and the network device transmits the PDCCH in the scheduling cell based on the first blind detection capability. For determining the first blind detection capability by the network device, reference may be made to a method for determining the first blind detection by the terminal device, which is not described herein again.

Because the first blind detection capability is determined by the terminal device according to the number of the downlink cells configured by the network device, the blind detection capability of the terminal device in each span of each scheduling cell can be determined in the carrier aggregation scene by the above scheme.

In addition, according to the method, under the scene of carrier aggregation, the blind detection capability of the scheduling cell is increased in proportion according to the number of the scheduled cells, namely, the blind detection capability of each span of the scheduling cell can be increased by the first scheme, namely, the terminal equipment has higher blind detection capability, so that the time delay and reliability of services are ensured. Meanwhile, all downlink cells can be scheduled normally in a cross-carrier scheduling scene.

In the embodiments provided in the present application, the method provided in the embodiments of the present application is introduced from the perspective of interaction between the terminal device and the network device. In order to implement the functions in the method provided by the embodiment of the present application, the terminal device and the network device may include a hardware structure and/or a software module, and implement the functions in the form of a hardware structure, a software module, or a hardware structure plus a software module. Whether any of the above-described functions is implemented as a hardware structure, a software module, or a hardware structure plus a software module depends upon the particular application and design constraints imposed on the technical solution.

The following describes a communication device for implementing the above method in the embodiment of the present application with reference to the drawings. Therefore, the above contents can be used in the subsequent embodiments, and the repeated contents are not repeated.

Fig. 6 is a schematic block diagram of a communication apparatus 600 according to an embodiment of the present application. The communication apparatus 600 is capable of performing the behavior and functions of the terminal device in the above method embodiments, and will not be described in detail here to avoid repetition. The communication device 600 may be a terminal device, or may be a chip applied to a terminal device. The communication apparatus 600 includes: a processing unit 610 and a transceiving unit 620,

the transceiver unit 620 is configured to receive first indication information, where the first indication information indicates the number of downlink cells; the processing unit 620 is configured to determine a first blind detection capability of a scheduling cell according to the number of the downlink cells indicated by the first indication information received by the transceiver unit, and perform PDCCH blind detection in the scheduling cell according to the first blind detection capability, where the scheduling cell is a cell in the downlink cell, the first blind detection capability is the maximum number of non-overlapping CCEs in each time window span or the maximum number of candidate PDCCHs in each span, and a time domain length of the span is less than a time domain length of a time slot.

The processing unit 620 is specifically configured to determine that the first blind detection capability of the scheduling cell is any one of the following:

for example, when the number of the downlink cells is less than or equal to a first value, the determined first blind detection capability of the scheduling cell is a sum of first blind detection capabilities of all cells in all the scheduled cells.

For example, when the number of the downlink cells is less than or equal to a first value, the determined first blind detection capability of the scheduling cell is a product of a maximum value of the first blind detection capabilities of all the scheduled cells and the number of the scheduled cells.

Wherein j represents the index of the subcarrier spacing, and the subcarrier spacing corresponding to j is 2^j×15kHz，K ^jIndicating subcarrier spacing of 2 in all scheduled cells^jMaximum value of first blind detection capability, L, for scheduled cell of x 15kHz^jSubcarrier spacing of 2 for all scheduled cells^jThe number of scheduled cells multiplied by 15kHz, J is a positive integer.

Illustratively, the number of downlink cells is less than or equal to a first valueThe determined first blind detection capability of the scheduling cell is

Wherein j represents the index of the subcarrier spacing, and the subcarrier spacing corresponding to j is 2^j×15kHz，K ^jIndicating subcarrier spacing of 2 in all scheduled cells^jMinimum value of first blind detection capability, L, of scheduled cell of x 15kHz^jSubcarrier spacing of 2 for all scheduled cells^jThe number of scheduled cells multiplied by 15kHz, J is a positive integer.

Wherein j represents the index of the subcarrier spacing, and the subcarrier spacing corresponding to j is 2^j×15kHz，K ^jIndicating subcarrier spacing of 2 in all scheduled cells^jMaximum value of first blind detection capability, L, for scheduled cell of x 15kHz^jSubcarrier spacing of 2 for all scheduled cells^jThe number of the scheduled cells multiplied by 15kHz, J is a positive integer, N is the number of the scheduling cells, and M is the number of the downlink cells.

Wherein j represents the index of the subcarrier spacing, and the subcarrier spacing corresponding to j is 2^j×15kHz，K ^jIndicating subcarrier spacing of 2 in all scheduled cells^jMinimum value of first blind detection capability, L, of scheduled cell of x 15kHz^jFor all that isSubcarrier spacing of 2 in scheduled cell^jThe number of the scheduled cells multiplied by 15kHz, J is a positive integer, N is the number of the scheduling cells, and M is the number of the downlink cells.

indicating a subcarrier spacing of 2^jThe number of downlink cells corresponding to a span pattern with index of i multiplied by 15kHz, CⁱIndicating a subcarrier spacing of 2^jSecond blind detection capability for span pattern with index i x 15 kHz.

All relevant contents of each step related to the above method embodiment may be referred to the functional description of the corresponding functional module, and are not described herein again.

Fig. 7 is a schematic block diagram of a communication apparatus 700 according to an embodiment of the present application. The communication apparatus 700 can perform the behavior function of the network device in the above method embodiment, and is not described in detail here to avoid repetition. The communication apparatus 700 may be a network device, or may be a chip applied to a network device. The communication apparatus 700 includes: a processing unit 710 and a transceiver unit 720, wherein,

the transceiver unit 720 is configured to send first indication information, where the first indication information indicates the number of downlink cells;

the processing unit 710 is configured to determine, according to the number of the downlink cells, a first blind detection capability of the terminal device in a scheduling cell, where the scheduling cell is a cell in the downlink cell, the first blind detection capability is the number of largest non-overlapping Control Channel Elements (CCEs) of each time window span or the number of largest candidate Physical Downlink Control Channels (PDCCHs) of each time window span, a time domain length of the span is smaller than a time domain length of a time slot, and control the transceiver unit 702 to transmit the PDCCHs in the scheduling cell according to the first blind detection capability.

Fig. 8 is a schematic block diagram of a communication device 800 according to an embodiment of the present application. The communication apparatus 800 is capable of performing the steps performed by the terminal device in the foregoing method embodiment, and may also be configured to perform the steps performed by the network device in the foregoing method embodiment, and details are not described here to avoid repetition. The communication apparatus 800 may be a terminal device, or a chip applied to a terminal device, and the communication apparatus 800 may also be a network device, or a chip applied to a network device. The communication apparatus 800 includes:

a memory 810 for storing a program;

a communication interface 820 for communicating with other devices;

a processor 830 configured to execute the program in the memory 810, wherein when the program is executed, the processor 830 is configured to receive first indication information through the communication interface 820, and the first indication information indicates the number of downlink cells; and the apparatus is configured to determine a first blind detection capability of a scheduling cell according to the number of the downlink cells indicated by the first indication information received by the transceiver unit, and perform PDCCH blind detection in the scheduling cell according to the first blind detection capability, where the scheduling cell is a cell in the downlink cell, the first blind detection capability is the maximum number of non-overlapping CCEs in each time window span or the maximum number of candidate PDCCHs in each span, and a time domain length of the span is less than a time domain length of a time slot.

Or, the processor 830 is configured to send first indication information to a terminal device through the communication interface 820, where the first indication information indicates the number of downlink cells, and determine, according to the number of the downlink cells, a first blind detection capability of the terminal device in a scheduling cell, where the scheduling cell is a cell in the downlink cells, the first blind detection capability is the number of largest non-overlapping CCEs in each time window span or the number of largest candidate PDCCHs in each span, a time domain length of the span is smaller than a time domain length of a time slot, and send a PDCCH in the scheduling cell through the communication interface 820 according to the determined first blind detection capability.

It should be understood that the communication device 800 shown in fig. 8 may be a chip or a circuit. Such as a chip or circuit that may be provided within a terminal device or a chip or circuit that may be provided within a network device. The communication interface 820 may also be a transceiver. The transceiver includes a receiver and a transmitter. Further, the communication device 800 may also include a bus system.

The processor 830, the memory 810, the receiver and the transmitter are connected through a bus system, and the processor 830 is configured to execute instructions stored in the memory 810 to control the receiver to receive signals and control the transmitter to transmit signals, so as to complete the steps of the network device in the communication method of the present application. Wherein the receiver and the transmitter may be the same or different physical entities. When the same physical entity, may be collectively referred to as a transceiver. The memory 810 may be integrated in the processor 830 or may be provided separately from the processor 830.

As an implementation manner, the functions of the receiver and the transmitter may be considered to be implemented by a transceiving circuit or a transceiving dedicated chip. Processor 830 may be considered to be implemented by a dedicated processing chip, a processing circuit, a processor, or a general-purpose chip.

The specific connection medium among the communication interface 820, the processor 830 and the memory 810 is not limited in the embodiments of the present application. In the embodiment of the present application, the memory 810, the processor 830 and the communication interface 820 are connected by a bus in fig. 8, the bus is represented by a thick line in fig. 8, and the connection manner between other components is merely illustrative and is not limited thereto. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in FIG. 8, but this is not intended to represent only one bus or type of bus.

In the embodiments of the present application, the processor 830 may be a general-purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component, and may implement or execute the methods, steps, and logic blocks disclosed in the embodiments of the present application. A general purpose processor may be a microprocessor or any conventional processor or the like. The steps of a method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware processor, or may be implemented by a combination of hardware and software modules in a processor.

In the embodiment of the present application, the memory 810 may be a non-volatile memory, such as a Hard Disk Drive (HDD) or a solid-state drive (SSD), and may also be a volatile memory (RAM), for example, a random-access memory (RAM). The memory is 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 such. The memory in the embodiments of the present application may also be circuitry or any other device capable of performing a storage function for storing program instructions and/or data.

The communication device in the above embodiments may be a terminal device, a circuit, a chip applied to a terminal device, or other combined devices and components having the functions of the terminal device. When the communication device is a terminal device, the transceiver unit may be a transceiver, and may include an antenna, a radio frequency circuit, and the like, and the processing module may be a processor, for example: a Central Processing Unit (CPU). When the communication device is a component having the functions of the terminal equipment, the transceiver unit may be a radio frequency unit, and the processing module may be a processor. When the communication device is a chip system, the transceiver unit may be an input/output interface of the chip system, and the processing module may be a processor of the chip system.

Fig. 9 shows a simplified schematic diagram of a possible design structure of the terminal device involved in the above-described embodiment. The terminal equipment includes a transmitter 901, a receiver 902, a controller/processor 903, a memory 904, and a modem processor 905.

The transmitter 901 is configured to transmit an uplink signal, which is transmitted to the network device in the above-described embodiment via the antenna. On the downlink, the antenna receives a downlink signal (DCI) transmitted by the network device in the above-described embodiment. The receiver 902 is configured to receive a downlink signal (DCI) received from an antenna. In modem processor 905, an encoder 906 receives and processes traffic data and signaling messages to be sent on the uplink. A modulator 907 further processes (e.g., symbol maps and modulates) the coded traffic data and signaling messages and provides output samples. A demodulator 909 processes (e.g., demodulates) the input samples and provides symbol estimates. A decoder 908 processes (e.g., decodes) the symbol estimates and provides decoded data and signaling messages for transmission to the terminal device. The encoder 906, modulator 907, demodulator 909, and decoder 908 can be implemented by a combined modem processor 905. These elements are processed according to the radio access technology employed by the radio access network.

The controller/processor 903 controls and manages the operation of the terminal device, and executes the processing performed by the terminal device in the above-described embodiment. For example, the method is used to control a terminal device to receive first indication information from a network device, determine a first blind detection capability of a scheduling cell according to the number of downlink cells indicated by the received first indication information, and perform PDCCH blind detection in the scheduling cell according to the first blind detection capability, where the scheduling cell is a cell in the downlink cells, the first blind detection capability is the number of largest non-overlapping CCEs of each span or the number of largest candidate PDCCHs of each span, and a time domain length of the span is smaller than a time domain length of a time slot and/or other processes of the technology described in this application. The controller/processor 903 is used to enable the terminal device to perform the process S402 in fig. 4, as an example.

Fig. 10 shows a simplified schematic of a communication device. For ease of understanding and illustration, in fig. 10, the communication apparatus is exemplified by a network device. The network device may be applied to the system shown in fig. 3, and may be the network device in fig. 3, and performs the functions of the network device in the above method embodiment. The network device 1000 may include one or more radio frequency units, such as a Remote Radio Unit (RRU) 1010 and one or more baseband units (BBUs) (also referred to as digital units, DUs) 1020. The RRU 1010 may be referred to as a communication module, which corresponds to the transceiver unit 720 in fig. 7, and optionally may also be referred to as a transceiver, transceiver circuit, or transceiver, which may include at least one antenna 1011 and a radio frequency unit 1012. The RRU 1010 is mainly used for transceiving radio frequency signals and converting the radio frequency signals and baseband signals, for example, for sending indication information to a terminal device. The BBU 1020 part is mainly used for performing baseband processing, controlling a base station, and the like. The RRU 1010 and the BBU 1020 may be physically disposed together or may be physically disposed separately, i.e., distributed base stations.

The BBU 1020 is a control center of the base station, and may also be referred to as a processing module, and may correspond to the processing unit 710 in fig. 7, and is mainly used for completing baseband processing functions, such as channel coding, multiplexing, modulation, spreading, and the like. For example, the BBU (processing module) may be configured to control the base station to perform an operation procedure related to the network device in the foregoing method embodiment, for example, to generate the foregoing indication information.

In an example, the BBU 1020 may be formed by one or more boards, and the boards may collectively support a radio access network of a single access system (e.g., an LTE network), or may respectively support radio access networks of different access systems (e.g., an LTE network, a 5G network, or other networks). The BBU 1020 also includes a memory 1021 and a processor 1022. The memory 1021 is used to store necessary instructions and data. The processor 1022 is configured to control the base station to perform necessary actions, for example, to control the base station to execute the operation procedure related to the network device in the above method embodiment. The memory 1021 and the processor 1022 may serve one or more boards. That is, the memory and processor may be provided separately on each board. Multiple boards may share the same memory and processor. In addition, each single board can be provided with necessary circuits.

The embodiment of the present application further provides a communication system, and specifically, the communication system includes a terminal device and a network device, or may further include more terminal devices and network devices.

The terminal device and the network device are respectively used for realizing the functions of the related devices in fig. 4. Please refer to the related description in the above method embodiments, which is not repeated herein.

Also provided in the embodiments of the present application is a computer-readable storage medium, which includes instructions, when executed on a computer, cause the computer to execute the method performed by the terminal device and the network device in fig. 4.

Also provided in an embodiment of the present application is a computer program product including instructions, which when executed on a computer, cause the computer to execute the method performed by the terminal device and the network device in fig. 4.

The embodiment of the application provides a chip system, which comprises a processor and a memory, and is used for realizing the functions of the terminal equipment and the network equipment in the method. The chip system may be formed by a chip, and may also include a chip and other discrete devices.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. 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.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the several embodiments provided in the present application, it should be understood that the above-described apparatus embodiments are merely illustrative, for example, the division of the units is only one logical function division, and there may be other division manners in actual implementation, for example, a plurality of units or components may be combined or may be integrated into another system, or some features may be omitted, or not executed. In addition, the communication connections shown or discussed may be indirect couplings or communication connections between devices or units through interfaces, and may be electrical, mechanical or other forms.

In addition, each unit in the embodiments of the apparatus of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.

It is understood that the processor in the embodiments of the present application may be a Central Processing Unit (CPU), other general purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other programmable logic device, a transistor logic device, a hardware component, or any combination thereof. The general purpose processor may be a microprocessor, but may be any conventional processor.

The methods in the embodiments of the present application may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, 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 programs or instructions. When the computer program or instructions are loaded and executed on a computer, the processes or functions described in the embodiments of the present application are performed in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer program or instructions may be stored in 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.), the computer readable storage medium may be any available medium that can be accessed by a computer or a data storage device including one or more integrated servers, data centers, etc., the available medium may be magnetic medium (e.g., floppy disk, hard disk, magnetic tape), optical medium (e.g., a Digital Video Disc (DVD), a semiconductor medium (e.g., SSD), or the like.

An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium. Of course, the storage medium may also be integral to the processor. The processor and the storage medium may reside in an ASIC. In addition, the ASIC may reside in a network device or a terminal device. Of course, the processor and the storage medium may reside as discrete components in a transmitting device or a receiving device.

In the embodiments of the present application, unless otherwise specified or conflicting with respect to logic, the terms and/or descriptions in different embodiments have consistency and may be mutually cited, and technical features in different embodiments may be combined to form a new embodiment according to their inherent logic relationship.

It is to be understood that the various numerical references referred to in the embodiments of the present application are merely for descriptive convenience and are not intended to limit the scope of the embodiments of the present application. The sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of the processes should be determined by their functions and inherent logic.

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 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

A method of communication, comprising:

receiving first indication information, wherein the first indication information indicates the number of downlink cells;

determining a first blind detection capability of a scheduling cell according to the number of the downlink cells, wherein the scheduling cell is a cell in the downlink cells, the first blind detection capability is the number of the largest non-overlapping Control Channel Elements (CCEs) of each time window span or the number of the largest candidate Physical Downlink Control Channels (PDCCHs) of each time window span, and the time domain length of the span is less than the time domain length of one time slot;

and carrying out PDCCH blind detection in the scheduling cell according to the first blind detection capability.
The method of claim 1, wherein the number of downlink cells is less than or equal to a first value, and wherein the determining the first blind detection capability of the scheduling cell comprises:

a sum of the first blind detection capabilities of each of all scheduled cells; alternatively, the first and second electrodes may be,

the product of the maximum value of the first blind detection capability in all scheduled cells and the number of the scheduled cells.
The method of claim 1, wherein the number of downlink cells is less than or equal to a first value, and the determined first blind detection capability of the scheduling cell is
Wherein j represents the index of the subcarrier spacing, and the subcarrier spacing corresponding to j is 2^j×15kHz，K ^jIndicating subcarrier spacing of 2 in all scheduled cells^jMaximum value of first blind detection capability, L, for scheduled cell of x 15kHz^jSubcarrier spacing of 2 for all scheduled cells^jThe number of scheduled cells multiplied by 15kHz, J is a positive integer.
The method of claim 1 or 2, wherein the number of downlink cells is greater than a first value, and the determined first blind detection capability of the scheduling cell is
Wherein j represents the index of the subcarrier spacing, and the subcarrier spacing corresponding to j is 2^j×15kHz，K ^jIndicating subcarrier spacing of 2 in all scheduled cells^jMaximum value of first blind detection capability, L, for scheduled cell of x 15kHz^jSubcarrier spacing of 2 for all scheduled cells^jThe number of the scheduled cells multiplied by 15kHz, J is a positive integer, N is the number of the scheduling cells, and M is the number of the downlink cells.
The method of claim 1 or 2, wherein the number of downlink cells is greater than a first value, and the determined first blind detection capability of the scheduling cell is
Wherein j represents the index of the subcarrier spacing, and the subcarrier spacing corresponding to j is 2^jX 15kHz, J is a positive integer, L^jSubcarrier spacing of 2 for all scheduled cells^jThe number of scheduled cells multiplied by 15kHz, M is the number of downlink cells,
where i is the subcarrier spacing of 2^jIndex of span pattern of x 15kHz, H is subcarrier spacing of 2^jThe number of span patterns multiplied by 15kHz,
indicating a subcarrier spacing of 2^jThe number of downlink cells corresponding to a span pattern with index of i multiplied by 15kHz, CⁱIndicating a subcarrier spacing of 2^jSecond blind detection capability for span pattern with index i x 15 kHz.
The method of any one of claims 2-5, further comprising:

determining a first blind detection capability for each of the scheduled cells.
The method of any one of claims 2-6, further comprising:

and sending second indication information, wherein the second indication information is used for indicating the first numerical value.
A method of communication, comprising:

sending first indication information, wherein the first indication information indicates the number of downlink cells;

determining a first blind detection capability of the terminal equipment in a scheduling cell according to the number of the downlink cells, wherein the scheduling cell is a cell in the downlink cells, the first blind detection capability is the number of the largest non-overlapping Control Channel Elements (CCEs) of each time window span or the number of the largest candidate Physical Downlink Control Channels (PDCCHs) of each time window span, and the time domain length of the span is less than the time domain length of one time slot;

and sending the PDCCH in the scheduling cell according to the first blind detection capability.
The method of claim 8, wherein the number of downlink cells is less than or equal to a first value, and the determining the first blind detection capability of the terminal device in the scheduling cell comprises:

a sum of the first blind detection capabilities of each of all scheduled cells; alternatively, the first and second electrodes may be,

the product of the maximum value of the first blind detection capability in all scheduled cells and the number of the scheduled cells.
The method of claim 8, wherein the number of downlink cells is less than or equal to a first value, and the determined first blind detection capability of the terminal device in the scheduling cell is
Wherein j represents the index of the subcarrier spacing, and the subcarrier spacing corresponding to j is 2^j×15kHz，K ^jIndicating subcarrier spacing of 2 in all scheduled cells^jMaximum value of first blind detection capability, L, for scheduled cell of x 15kHz^jSubcarrier spacing of 2 for all scheduled cells^jThe number of scheduled cells multiplied by 15kHz, J is a positive integer.
The method of claim 8 or 9, wherein the downlink cellIs greater than a first value, the determined first blind detection capability of the terminal device in the scheduling cell is
Wherein j represents the index of the subcarrier spacing, and the subcarrier spacing corresponding to j is 2^j×15kHz，K ^jIndicating subcarrier spacing of 2 in all scheduled cells^jMaximum value of first blind detection capability, L, for scheduled cell of x 15kHz^jSubcarrier spacing of 2 for all scheduled cells^jThe number of the scheduled cells multiplied by 15kHz, J is a positive integer, N is the number of the scheduling cells, and M is the number of the downlink cells.
The method according to claim 8 or 9, wherein the number of downlink cells is greater than a first value, and the determined first blind detection capability of the terminal device in the scheduling cell is
Wherein j represents the index of the subcarrier spacing, and the subcarrier spacing corresponding to j is 2^jX 15kHz, J is a positive integer, L^jSubcarrier spacing of 2 for all scheduled cells^jThe number of scheduled cells multiplied by 15kHz, M being the number of downlink cells, Q^jIs composed of
Where i is the subcarrier spacing of 2^jIndex of span pattern of x 15kHz, H is subcarrier spacing of 2^jThe number of span patterns multiplied by 15kHz,
indicating between sub-carriersPartition is 2^jThe number of downlink cells corresponding to a span pattern with index of i multiplied by 15kHz, CⁱIndicating a subcarrier spacing of 2^jSecond blind detection capability for span pattern with index i x 15 kHz.
The method of any one of claims 9-12, further comprising:

determining a first blind detection capability of each of the scheduled cells of the terminal device.
The method of any one of claims 9-13, further comprising:

and receiving second indication information, wherein the second indication information is used for indicating the first numerical value.
A communications apparatus, comprising:

a transceiver unit, configured to receive first indication information, where the first indication information indicates the number of downlink cells;

and a processing unit, configured to determine a first blind detection capability of a scheduling cell according to the number of the downlink cells indicated by the first indication information received by the transceiver unit, and perform PDCCH blind detection in the scheduling cell according to the first blind detection capability, where the scheduling cell is a cell in the downlink cell, the first blind detection capability is the number of largest non-overlapping Control Channel Elements (CCEs) of each time window span or the number of largest candidate Physical Downlink Control Channels (PDCCHs) of each time window span, and a time domain length of the span is less than a time domain length of one time slot.
The communications apparatus as claimed in claim 15, wherein the processing unit is specifically configured to, when the number of downlink cells is less than or equal to a first value, determine that the first blind detection capability of the scheduling cell is:

a sum of the first blind detection capabilities of each of all scheduled cells; alternatively, the first and second electrodes may be,

the product of the maximum value of the first blind detection capability in all scheduled cells and the number of the scheduled cells.
The communications apparatus as claimed in claim 15, wherein the processing unit is specifically configured to determine the first blind detection capability of the scheduling cell as being when the number of downlink cells is smaller than or equal to a first value
Wherein j represents the index of the subcarrier spacing, and the subcarrier spacing corresponding to j is 2^j×15kHz，K ^jIndicating subcarrier spacing of 2 in all scheduled cells^jMaximum value of first blind detection capability, L, for scheduled cell of x 15kHz^jSubcarrier spacing of 2 for all scheduled cells^jThe number of scheduled cells multiplied by 15kHz, J is a positive integer.
The communications apparatus as claimed in claim 15 or 16, wherein the processing unit is specifically configured to determine, when the number of downlink cells is greater than a first value, that the first blind detection capability of the scheduling cell is
Wherein j represents the index of the subcarrier spacing, and the subcarrier spacing corresponding to j is 2^j×15kHz，K ^jIndicating subcarrier spacing of 2 in all scheduled cells^jMaximum value of first blind detection capability, L, for scheduled cell of x 15kHz^jSubcarrier spacing of 2 for all scheduled cells^jThe number of the scheduled cells multiplied by 15kHz, J is a positive integer, N is the number of the scheduling cells, and M is the number of the downlink cells.
The communications device according to claim 15 or 16, wherein the processing unit is specifically configured to determine the first blind detection capability of the scheduling cell as the number of downlink cells is greater than a first value
Wherein j represents the index of the subcarrier spacing, and the subcarrier spacing corresponding to j is 2^jX 15kHz, J is a positive integer, L^jSubcarrier spacing of 2 for all scheduled cells^jThe number of scheduled cells multiplied by 15kHz, M being the number of downlink cells, Q^jIs composed of
i is a subcarrier spacing of 2^jIndex of span pattern of x 15kHz, H is subcarrier spacing of 2^jThe number of span patterns multiplied by 15kHz,
indicating a subcarrier spacing of 2^jThe number of downlink cells corresponding to a span pattern with index of i multiplied by 15kHz, CⁱIndicating a subcarrier spacing of 2^jSecond blind detection capability for span pattern with index i x 15 kHz.
The communications apparatus as claimed in any of claims 16-19, wherein the processing unit is further configured to:

determining a first blind detection capability for each of the scheduled cells.
The communication device according to any of claims 16-20, wherein the transceiver unit is further configured to:

and sending second indication information, wherein the second indication information is used for indicating the first numerical value.
A communications apparatus, comprising:

and the transceiver unit is used for sending first indication information, and the first indication information indicates the number of downlink cells.

A processing unit, configured to determine, according to the number of the downlink cells, a first blind detection capability of a terminal device in a scheduling cell, where the scheduling cell is a cell in the downlink cell, the first blind detection capability is the number of largest non-overlapping Control Channel Elements (CCEs) of each time window span or the number of largest candidate Physical Downlink Control Channels (PDCCHs) of each time window span, and a time domain length of the span is smaller than a time domain length of one time slot;

the transceiver unit is configured to send a PDCCH in the scheduling cell according to the first blind detection capability determined by the processing unit.
The communications apparatus as claimed in claim 22, wherein the processing unit is specifically configured to, when the number of downlink cells is less than or equal to a first value, determine that the first blind detection capability of the terminal device in the scheduling cell is:

a sum of the first blind detection capabilities of each of all scheduled cells; alternatively, the first and second electrodes may be,

the product of the maximum value of the first blind detection capability in all scheduled cells and the number of the scheduled cells.
The communications apparatus as claimed in claim 22, wherein the processing unit is specifically configured to determine that the first blind detection capability of the terminal device in the scheduling cell is "when the number of downlink cells is less than or equal to a first value
Wherein j represents the index of the subcarrier spacing, and the subcarrier spacing corresponding to j is 2^j×15kHz，K ^jIndicating subcarrier spacing of 2 in all scheduled cells^jMaximum value of first blind detection capability, L, for scheduled cell of x 15kHz^jSubcarrier spacing of 2 for all scheduled cells^jThe number of scheduled cells multiplied by 15kHz, J is a positive integer.
The communications apparatus as claimed in claim 22 or 23, wherein the processing unit is specifically configured to, when the number of downlink cells is greater than a first value, determine that the first blind detection capability of the terminal device in the scheduling cell is as follows
Wherein j represents the index of the subcarrier spacing, and the subcarrier spacing corresponding to j is 2^j×15kHz，K ^jIndicating subcarrier spacing of 2 in all scheduled cells^jMaximum value of first blind detection capability, L, for scheduled cell of x 15kHz^jSubcarrier spacing of 2 for all scheduled cells^jThe number of the scheduled cells multiplied by 15kHz, J is a positive integer, N is the number of the scheduling cells, and M is the number of the downlink cells.
The communications apparatus as claimed in claim 22 or 23, wherein the processing unit is specifically configured to, when the number of downlink cells is greater than a first value, determine that the first blind detection capability of the terminal device in the scheduling cell is as follows
Wherein j represents the index of the subcarrier spacing, and the subcarrier spacing corresponding to j is 2^jX 15kHz, J is a positive integer, L^jSubcarrier spacing of 2 for all scheduled cells^jThe number of scheduled cells multiplied by 15kHz, M being the number of downlink cells, Q^jIs equal to
Where i is the subcarrier spacing of 2^jIndex of span pattern of x 15kHz, H is subcarrier spacing of 2^jThe number of span patterns multiplied by 15kHz,
indicating a subcarrier spacing of 2^jThe number of downlink cells corresponding to a span pattern with index of i multiplied by 15kHz, CⁱIndicating a subcarrier spacing of 2^jSecond blind detection capability for span pattern with index i x 15 kHz.
The communications apparatus as claimed in any of claims 23-26, wherein the processing unit is further configured to:

determining a first blind detection capability of each of the scheduled cells of the terminal device.
The communication device according to any of claims 23-27, wherein the transceiving unit is further configured to:

and receiving second indication information, wherein the second indication information is used for indicating the first numerical value.
A communication apparatus, comprising a processor coupled to a memory, the memory storing a computer program, the processor being configured to execute the computer program stored in the memory such that the apparatus implements the method of any of claims 1-7 or 8-14.
A computer-readable storage medium, characterized in that the computer-readable storage medium stores a computer program which, when executed by a computer, causes the computer to perform the method of any of claims 1-7 or 8-14.