CN114424667B

CN114424667B - Communication method and device

Info

Publication number: CN114424667B
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: 2023-11-17
Anticipated expiration: 2039-09-30
Also published as: WO2021062687A1; CN114424667A

Abstract

A communication method and device, wherein the communication method comprises the following steps: receiving indication information indicating the number of downlink cells, determining 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 control channel elements CCE which are not overlapped maximally for each time window span or the number of maximum candidate physical downlink control channel PDCCHs for each time window span, the time domain length of span is smaller than the time domain length of one time slot, and performing 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 under the CA scene, thereby meeting the requirements of low delay and high reliability of the service.

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 (downlink control information, DCI) to a terminal device through a physical downlink control channel (Physical Downlink Control Channel, PDCCH). One DCI is transmitted in one PDCCH, which occupies one or more control channel elements (control channel element, CCEs). The network device selects to transmit the DCI on 1 CCE, 2 CCEs, 4 CCEs, or 8 CCEs according to the size of the DCI and the required control channel transmission reliability. 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 the terminal device, wherein the blind detection capabilities comprise the number of non-overlapping CCEs which can be used for channel estimation by the terminal device in a period of time or the number of maximum candidate physical downlink control channel PDCCHs which can be subjected to blind detection in a period of time.

In the technical research of a New air interface (5G New radio, 5G-NR), a concept of a time window (span), which may also be called a monitoring time window (monitoring span), is introduced, the length of a span is smaller than the time length of a slot, and in a single carrier scenario, the number of non-overlapping CCEs that can perform channel estimation in a span or the number of largest candidate physical downlink control channels PDCCH that can be blindly detected in a period of time is defined.

However, in the context of carrier aggregation (carrier aggregation, CA), there is currently no explicit scheme how to determine the blind detection capability of a terminal device at each span.

Disclosure of Invention

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

In a first aspect, a communication method is provided, where the method may be executed by a terminal device or a chip applied in the terminal device. The following describes an example in which the execution subject 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, according to the number of the downlink cells, the first blind detection capability of a scheduling cell can be determined, the scheduling cell is a cell in the downlink cells, the first blind detection capability is the number of control channel elements CCE which are not overlapped maximally or the number of maximum 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 one time slot, and the 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, where the method may be executed by a network device or a chip applied in the network device. The following describes an example in which the execution subject is a network device. The method comprises the following steps: transmitting first indication information, wherein the first indication information indicates the number of downlink cells, and according to the number of the downlink cells, the first blind detection capability of terminal equipment in a scheduling cell is determined, wherein the scheduling cell is a cell in the downlink cells, the first blind detection capability is the number of control channel elements CCE which are not overlapped maximally for each time window span or the number of maximum candidate physical downlink control channel PDCCHs for each time window span, and the time domain length of span is smaller than the time domain length of one time slot; and transmitting PDCCH in the dispatching 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 it can be seen that, by using the method provided by the embodiment of the present application, the first blind detection capability of the terminal device in each scheduling cell can be clarified in a carrier aggregation scenario. Meanwhile, as the first blind detection capability of each scheduling cell is determined according to the number of downlink cells, 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 blindly detect more candidate PDCCHs in one span, or the terminal equipment can be ensured to carry out channel estimation in one span, so that the number of non-overlapping CCEs of the terminal equipment is more, and the low delay and the high reliability of the service are ensured.

In embodiments of the foregoing first and second aspects, the determined first blind detection capability of the scheduling cell is any one of the following:

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

In an exemplary embodiment, 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 a product of a maximum value of the first blind detection capability of all the scheduled cells and the number of the scheduled cells. By adopting the scheme, the blind detection capability of the dispatching cell is increased in proportion to the number of the dispatched cells, namely the first blind detection capability of the dispatching cell can be increased, and under the cross-carrier dispatching scene, the terminal equipment can be ensured to have enough first blind detection capability in the dispatching cell to carry out blind detection on the PDCCH of the dispatching cell, thereby ensuring low time delay and high reliability of the service in the dispatching cell.

Exemplary, 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 isWherein j represents the index of the subcarrier spacing, and the subcarrier spacing corresponding to j is 2 ^j ×15kHz，K ^j Indicating a subcarrier spacing of 2 in all scheduled cells ^j Maximum value of first blind detection capability of x 15kHz scheduled cell, L ^j Subcarrier spacing of 2 for all scheduled cells ^j The number of scheduled cells is multiplied by 15kHz, and J is a positive integer. With this scheme, in the scheduling cell, the subcarrier spacing is 2 ^j The first blind detection capability of the scheduled cell with the x 15kHz is the product of the maximum first blind detection capability of the scheduled cell with the subcarrier interval in all the scheduled cells and the number of the scheduled cells with the subcarrier interval, so that the terminal equipment has the maximum first blind detection capability to carry out blind detection on PDCCH of the scheduled cell in each scheduled cell with the subcarrier interval, and the low time delay and high reliability of the service in the scheduled cells are ensured.

The number of the downlink cells is smaller 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 ^j Indicating a subcarrier spacing of 2 in all scheduled cells ^j Minimum value of first blind detection capability of x 15kHz scheduled cell，L ^j Subcarrier spacing of 2 for all scheduled cells ^j The number of scheduled cells is multiplied by 15kHz, and J is a positive integer. With this scheme, in the scheduling cell, the subcarrier spacing is 2 ^j The first blind detection capability of the scheduled cell with the multiplied by x 15kHz is the product of the minimum first blind detection capability of the scheduled cell with the subcarrier interval and the number of the scheduled cells with the subcarrier interval, so that the scheduled cell with each subcarrier interval is guaranteed, the terminal equipment has the minimum first blind detection capability to blindly detect the PDCCH of the scheduled cell, the first blind detection capability of the terminal equipment in the scheduled cell is not excessive under the scene of carrier aggregation (namely, the normal scheduling of the scheduled cell is guaranteed), and the power loss of the terminal equipment is reduced.

The number of the downlink cells is greater than a first value, and the determined first blind detection capability of the scheduling cell isWherein j represents the index of the subcarrier spacing, and the subcarrier spacing corresponding to j is 2 ^j ×15kHz，K ^j Indicating a subcarrier spacing of 2 in all scheduled cells ^j Maximum value of first blind detection capability of x 15kHz scheduled cell, L ^j Subcarrier spacing of 2 for all scheduled cells ^j The number of the scheduled cells is multiplied by 15kHz, J is a positive integer, N is the number of the scheduled cells, and M is the number of the downlink cells. With this scheme, 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 blind detection cells that the terminal device can support, at this time, if the subcarrier spacing of all the scheduled cells is still 2 ^j X 15kHz due to K ^j Indicating a subcarrier spacing of 2 in all scheduled cells ^j Maximum first blind detection capability of the scheduled cell of x 15kHz, then the maximum first blind detection capability for this subcarrier spacing should be nxk ^j But the number of scheduling cells of the actual subcarrier spacing is L ^j Occupy only L in all downlink cells ^j M, thusFor subcarrier spacing of 2 ^j The total first blind detection capability of the scheduling cell of x 15kHz is +.>Namely, calculating the maximum first blind detection capability of all the scheduled cells with small subcarrier intervals, and then adopting the same mode for the scheduled cells with certain subcarrier intervals, so as to calculate the sum of the maximum first blind detection capability of all the scheduled cells with all the subcarrier intervals as the blind detection capability of all the scheduled cells with all the subcarrier intervals in the scheduling cells. Therefore, the first blind detection capability of the scheduling cell is not increased in proportion to the increase of the number of the downlink cells without limitation, but is limited by the number of the blind detection cells which can be supported by the terminal equipment, and 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, 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 implementation complexity of the terminal equipment are reduced.

The number of the downlink cells is greater than a first value, and the determined first blind detection capability of the scheduling cell isWherein j represents the index of the subcarrier spacing, and the subcarrier spacing corresponding to j is 2 ^j ×15kHz，K ^j Indicating a subcarrier spacing of 2 in all scheduled cells ^j Minimum value of first blind detection capability of x 15kHz scheduled cell, L ^j Sub-carrier spacing of 2 for all scheduled cells ^j The number of the scheduled cells is multiplied by 15kHz, J is a positive integer, N is the number of the scheduled cells, and M is the number of the downlink cells. With this scheme, 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 blind detected cells that the terminal device can support, at this time, it is assumed that the subcarrier spacing according to all the scheduled cells is 2 ^j ×15kHz，K ^j Indicating a subcarrier spacing of 2 in all scheduled cells ^j The minimum value of the first blind detection capability of the scheduled cell of x 15kHz, the minimum first blind detection capability for this subcarrier spacing should be N x K ^j But the number of scheduling cells of the actual subcarrier spacing is L ^j Occupy only L in the full downlink cell ^j M, thus for subcarrier spacing of 2 ^j The total first blind detection capability of the scheduling cell of x 15kHz is +.>The minimum first blind detection capability of all the scheduled cells with small subcarrier spacing is calculated, and then the same mode is adopted for the scheduled cells with certain subcarrier spacing, so that the blind detection capability of all the scheduled cells is calculated as the sum of the minimum first blind detection capability of all the scheduled cells with all the subcarrier spacing. Therefore, the first blind detection capability of the scheduling cell is not increased in proportion to the increase of the number of the downlink cells without limitation, 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, and the power consumption and the implementation complexity of the terminal equipment are reduced.

The number of the downlink cells is greater than a first value, and the determined first blind detection capability of the scheduling cell isWherein j represents the index of the subcarrier spacing, and the subcarrier spacing corresponding to j is 2 ^j X 15kHz, J is a positive integer, L ^j Sub-carrier spacing of 2 for all scheduled cells ^j The number of the scheduled cells is multiplied by 15kHz, and M is the number of the downlink cells; q (Q) ^j Equal to->Wherein i is the subcarrier spacing of 2 ^j Index of span pattern of x 15kHz, H is subcarrier spacing of 2 ^j Number of span patterns of x 15kHz, +.>Indicating a subcarrier spacing of 2 ^j The number of downlink cells corresponding to span pattern with index of i of x 15kHz, C ⁱ Indicating a subcarrier spacing of 2 ^j Second blind detection capability corresponding to span pattern of index i x 15 kHz. With this scheme, the subcarrier spacing is 2 ^j The second blind detection capability corresponding to the span pattern with index i of x 15kHz, namely the subcarrier interval reported by the terminal equipment is 2 ^j Blind detection capability per span of each span pattern x 15kHz, determining the subcarrier spacing to be 2 ^j And the first blind detection capability of the scheduling cell with the multiplied by 15kHz is obtained, and then the blind detection capability of the scheduling cell with all subcarrier intervals is summed to obtain the blind detection capability with small scheduling. Under the scene of carrier aggregation, the first blind detection capability of the scheduling cells is not increased in proportion to the increase of the number of the downlink cells without limitation, 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 cells is ensured not to exceed the blind detection capability which can be supported by the terminal equipment, and the power consumption and the implementation complexity of the terminal equipment are reduced.

The second blind detection capability is, for example, the number of control channel elements CCEs that are not overlapped and largest in each time window span or the number of PDCCH that are largest in candidate physical downlink control channels in each time window span, where the number of CCEs is the largest in each time window span, and the number of CCEs is the largest in each time window span.

In the foregoing embodiment of the first aspect, before determining the first blind detection capability of the scheduling cell, the method may further include: a first blind detection capability of each of the scheduled cells is determined. So that the first blind detection capability of the scheduling cell can be determined from 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 indicating information, wherein the second indicating information is used for indicating the first numerical value. Specifically, the first value may be actively reported by the terminal device, so that when the network device indicates the number of downlink cells through the first indication information, the first value may be referred to, where the first value indicates the number of downlink cells that the terminal device can perform blind detection on the PDCCH. The number of times of the configured PDCCH blind detection and the number of configured non-overlapping CCEs are ensured as far as possible, and the number of downlink cells in which the terminal equipment can blindly detect the PDCCH is not exceeded.

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

For example, the predefined first value is 4, which represents the number of downlink cells for which the terminal device is able to blindly detect PDCCH. Thus, the number of the configured PDCCH blind detection times and the number of the configured non-overlapping CCEs are ensured as much as possible not to exceed the number of the downlink cells of which the terminal equipment can blindly detect the PDCCH.

In an embodiment of the second aspect, the method further includes: a first blind detection capability of each cell of the scheduled cells of the terminal device is determined.

In an embodiment of the 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 is not repeated herein, where the communication device has a function of implementing the actions in the method embodiments of the first aspect. The functions may be implemented by hardware, or may be implemented by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the functions described above. In one possible design, the communication device includes: the receiving and transmitting unit is used for receiving first indication information, the first indication information indicates the number of downlink cells, the processing unit is used for determining 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 transmitting 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 cell, the first blind detection capability is the number of control channel elements CCE which are not overlapped maximally for each time window span or the number of maximum candidate physical downlink control channels PDCCH for each time window span, and the time domain length of span is smaller than that of one time slot. These modules may perform the corresponding functions in the method examples of the first aspect described above, with specific reference to the detailed description in the method examples, which are not repeated here.

In a fourth aspect, a communication device is provided, and advantageous effects may be seen from the description of the second aspect and are not repeated here. The communication device has the functionality to implement the behavior in the method example of the second aspect described above. The functions may be implemented by hardware, or may be implemented by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the functions described above. In one possible design, the communication device includes: the receiving and transmitting unit is used for transmitting first indication information, and the first indication information indicates the number of downlink cells. The processing unit is used for determining 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 cell, the first blind detection capability is the number of control channel elements CCE which are not overlapped maximally for each time window span or the number of physical downlink control channel PDCCHs which are candidate maximally for each time window span, and the time domain length of the span is smaller than the time domain length of one time slot; the receiving and transmitting unit is configured to transmit a PDCCH in the scheduling cell according to the first blind detection capability determined by the processing unit. These modules may perform the corresponding functions in the method examples of the second aspect, which are specifically referred to in the method examples and are not described herein.

In a fifth aspect, a communication device is provided, where the communication device may be a terminal device in an embodiment of the method described above, or a chip provided in the terminal device. The communication device comprises a communication interface and a processor, and optionally a memory. The memory is used for storing a computer program or instructions, and the processor is coupled with the memory and the communication interface, when the processor executes the computer program or instructions, the communication device executes the method executed by the terminal device in the method embodiment.

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

In a seventh aspect, there is provided a computer program product comprising: computer program code which, when executed, 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, where the chip system includes a processor, and the processor is configured to implement a function of a terminal device in the method of the above aspects. In one possible design, the chip system further includes a memory for holding program instructions and/or data. The chip system can be composed of chips, and can also comprise chips and other discrete devices.

In a tenth aspect, the present application provides a chip system, where the chip system includes a processor, and the processor is configured to implement the functions of the network device in the methods of the above aspects. In one possible design, the chip system further includes a memory for holding program instructions and/or data. The chip system can be composed of chips, and can also comprise chips and other discrete devices.

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

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

Drawings

Fig. 1 is a schematic diagram of PDCCH blind detection opportunity provided in an embodiment of the present application;

fig. 2 is a schematic diagram of PDCCH blind detection opportunity provided in an embodiment of the present application;

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

fig. 4 is a schematic flow chart of a communication method according to an embodiment of the present application;

fig. 5 is a schematic diagram of 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 another communication device according to an embodiment of the present application;

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

fig. 10 is a schematic 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 more apparent, the embodiments of the present application will be described in further detail with reference to the accompanying drawings.

Before describing the present application, some of the terms in the embodiments of the present application will be explained in brief to facilitate understanding by those skilled in the art.

1) A terminal device, which may be simply referred to as a terminal, also referred to as a User Equipment (UE), is a device having a wireless transceiving function. The terminal device may be deployed on land, including indoors or outdoors, hand-held or vehicle-mounted; can also be deployed on the water surface (such as ships, etc.); but may also be deployed in the air (e.g., on an aircraft, drone, balloon, satellite, etc.). The terminal equipment can be a mobile phone, a tablet personal computer, a computer with a wireless receiving and transmitting function, a virtual reality terminal equipment, an augmented reality terminal equipment, a wireless terminal equipment in industrial control, a wireless terminal equipment in unmanned aerial vehicle, a wireless terminal equipment in remote medical treatment, a wireless terminal equipment in a smart grid, a wireless terminal equipment in transportation safety, a wireless terminal equipment in a smart city and a wireless terminal equipment in a smart home. The terminal device may also be fixed or mobile. The embodiment of the present application is not limited thereto.

In the embodiment of the present application, the device for implementing the function of the terminal may be a terminal device; or a device, such as a chip system, capable of supporting the terminal device to realize the function, which may be installed in the terminal device. In the embodiment of the application, the chip system can be composed of chips, and can also comprise chips and other discrete devices. In the technical solution provided in the embodiment of the present application, the device for implementing the function of the terminal device is an example of the 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, which may also be referred to as a radio access network (radio access network, RAN) device, which is a device that provides wireless communication functionality for the terminal device. Access network devices include, for example, but are not limited to: a next generation base station (gNB) in 5G, an evolved node B (eNB), a baseband unit (BBU), a transmit-receive point (transmitting and receiving point, TRP), a transmit point (transmitting point, TP), a base station in a future mobile communication system, an access point in a WiFi system, or the like. The access network device may also be a radio controller, a Centralized Unit (CU), and/or a Distributed Unit (DU) in the cloud radio access network (cloud radio access network, CRAN) scenario, or the network device may be a relay station, an in-vehicle device, a network device in a PLMN network of future evolution, etc.

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 (long term evolution, LTE), may communicate with an access network device supporting 5G, and may also communicate with an access network device supporting LTE and an access network device supporting 5G simultaneously. The embodiments of the present application are not limited.

In the embodiment of the present application, the device for implementing the function of the network device may be a network device; or may be a device, such as a system-on-a-chip, capable of supporting the network device to perform this function, which may be installed in the network device. In the technical solution provided in the embodiment of the present application, the device for implementing the function of the network device is exemplified by the network device, and the technical solution provided in the embodiment of the present application is described.

3) The application scenario of the fifth generation mobile (the fifth generation, 5G) communication system, the international telecommunications union (International Telecommunication Union, ITU) defines three major classes of application scenarios for 5G and future mobile communication systems, which are enhanced mobile broadband (Enhanced Mobile Broadband, eMBB), high reliability low latency communication (Ultra Reliable and Low Latency Communications, URLLC), and mass machine type communication (Massive Machine Type Communications, mctc), respectively. Among the typical eMBB services are: ultra-high definition video, augmented reality (augmented reality, AR), virtual Reality (VR), etc., the main characteristics of these services are large transmission data volume and high transmission rate. Typical URLLC traffic is: wireless control in industrial manufacturing or production processes, motion control of unmanned vehicles and unmanned planes, and haptic interaction applications such as remote repair and remote surgery, etc., the main characteristics of these services are the requirement of ultra-high reliability, low latency, less amount of transmitted data, and burstiness. Typical mctc traffic is: the intelligent power grid distribution automation, the intelligent city and the like are mainly characterized in that the quantity of networking equipment is huge, the transmission data quantity is small, the data is insensitive to the transmission delay, and the mMTC terminals are required to meet the requirements of low cost and very long standby time. The technical problem that needs of different services on a mobile communication system are different, and how to better support the data transmission needs of a plurality of different services simultaneously is the technical problem to be solved by the current 5G communication system. For example, how to support both URLLC service and eMBB service is the 4) search space of the discussion hotspot of the current 5G mobile communication system comprises a common search space (common search space, CSS) and a terminal device specific search space (UE-specific Search Space, USS). A plurality of terminal devices may retrieve DCI transmitted by the network device to the terminal device in a CSS for carrying common DCI. The USS is configured by the network equipment for each terminal equipment, and the terminal equipment detects the network equipment to send DCI of the terminal equipment in the USS according to the configuration information sent by the network equipment.

5) A CCE may include a plurality of resource element groups. The number of resource element groups to which one CCE corresponds may be fixed. For example, 4 or 6. One resource element group may occupy resources of S consecutive subcarriers in the frequency domain and/or resources of consecutive T 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=12 and t=1. The CCE is a basic unit of resources occupied by the PDCCH, one PDCCH may occupy L CCEs, and the value of L may be a value of 1, 2, 4, 8 or 16, etc., where the value of L is also called aggregation level (aggregation level, AL), for example, 4 CCEs occupied by one PDCCH is called as AL of the PDCCH being 4. The larger the AL value used in transmission of the same DCI, the higher the reliability.

6) The subcarriers, 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 a subcarrier spacing of 15kHz; in 5G, the subcarrier spacing may be 15kHz, 30kHz, 60kHz or 120kHz.

7) Configuration: it means that the network device sends configuration information to the terminal device, the configuration information indicating a certain content. The configuration information is carried in a higher layer signaling, which may refer to a signaling sent by a higher layer protocol layer, where the higher layer protocol layer is at least one protocol layer above a physical layer. The higher protocol layer may specifically include at least one of the following protocol layers: a medium access control (medium access control, MAC) layer, a radio link control (radio link control, RLC) layer, a packet data convergence protocol (packet data convergence protocol, PDCP) layer, a radio resource control (radio resource control, RRC) layer, and a non-access layer (non access stratum, NAS).

8) Time slot refers to a basic time unit. In the embodiment of the application, one time slot can occupy 14 continuous symbols (conventional cyclic prefix) or 12 continuous symbols (extended cyclic prefix) in the time domain. The symbols in the embodiments of the present application include, but are not limited to, an orthogonal frequency division multiplexing (Orthogonal Frequency Division Multiplexing, OFDM) symbol, a Sparse Code division multiple access (Sparse Code MultiplexingAccess, SCMA) symbol, a filtered orthogonal frequency division multiplexing (Filtered Orthogonal Frequency Division Multiplexing, F-OFDM) symbol, or a Non-orthogonal multiple access (Non-Orthogonal Multiple Access, NOMA) symbol, which may be specifically determined according to practical situations and will not be described herein.

9) A time window (span) is one unit of time shorter than a 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 The cell with scheduling capability is called a scheduling cell, that is, a cell where the terminal device receives the PDCCH is called a scheduling cell, and the PDCCH sent in the scheduling cell can schedule a physical uplink shared channel (physical uplink shared channel, PUSCH) or a physical downlink shared channel (physical downlink shared channel, PDSCH) in the cell, and PDCCHs of cells other than the cell can also be sent in the scheduling cell, where the PDCCHs schedule the PDSCH and the PUSCH in the other cells. The scheduled cell refers to a cell scheduled by the scheduled cell, that is, the scheduling information PDCCH of these cells may be transmitted not in the own cell but in other cells. The embodiment of the application takes each scheduling cell and a plurality of scheduled cells scheduled by the scheduling cell as an example to describe the method of the application. The scheduling cell may correspond to a primary cell Pcell in all downlink cells of the CA, and the tuned cell may correspond to a secondary cell, pcell and Scell in all downlink cells of the CA. Since it is possible to transmit not only the PDCCH of the present cell but also the PDCCH of the scheduled cell on the scheduling cell, the PDCCH blind detection capability on the scheduling cell needs to be larger, or in other words, in the scheduling cell, there is blind detection capability for different scheduling cells, i.e. on the scheduling cell, there is a need for blind detection of the PDCCH of the scheduled cell.

11 The terms "system" and "network" in embodiments of the application may be used interchangeably. The term "plurality" may also be understood as "at least two" in embodiments of the application. "at least one" may be understood as one or more, for example as one, two or more. For example, including at least one means including one, two or more, and not limiting what is included, e.g., including at least one of A, B and C, then A, B, C, A and B, A and C, B and C, or A and B and C, may be included. "and/or", describes an association relationship of an association object, and indicates that there may be three relationships, for example, a and/or B, and may indicate: a exists alone, A and B exist together, and B exists alone. The character "/", unless otherwise specified, generally indicates that the associated object is an "or" relationship.

Unless stated to the contrary, the embodiments of the present application refer to ordinal terms such as "first," "second," etc., for distinguishing between multiple objects and not for defining a sequence, timing, priority, or importance of the multiple objects. Such as a first terminal device and a second terminal device, only to distinguish between different terminal devices, and not to limit the functionality, priority, importance, etc. of the two terminal devices.

Having described some of the concepts to which embodiments of the present application relate, the technical features of embodiments of the present application are described below.

Since the terminal device does not know the specific time-frequency resource location of the PDCCH in advance, the 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 PDCCH blind detection is performed based on the blind detection capability, so that the blind detection capability cannot be exceeded when the terminal equipment performs PDCCH. The blind detection capability determined by the terminal device is different for different application scenarios, and is described below.

First, in a single carrier scenario:

the current protocol defines the blind detection capability of a terminal device in a slot in a cell, namely the maximum number of candidate PDCCHs which can be monitored by the terminal device and the maximum number of non-overlapping CCEs which can be monitored by the terminal device in the slot, wherein the maximum number of the candidate PDCCHs is the maximum number of the candidate PDCCHs which can be monitored by the terminal device in the slot, namely the blind detection of the terminal device in the slot can be performed. The latter represents the number of non-overlapping CCEs in one slot where the terminal device performs channel estimation at most.

For example, table 1 defines for the current protocol the maximum number of PDCCH candidates that a terminal device can monitor in one cell, one slot, of different subcarrier spacing, where μ represents an index of subcarrier spacing (Sub-carrier spacing) indicating that the corresponding subcarrier is 2 ^μ Specifically, when the subcarrier interval of the cell is 15kHz, the maximum number of PDCCH candidates that can be monitored in one slot is 44, and when the subcarrier interval of the cell is 60kHz, the maximum number of PDCCH candidates that can be monitored in one slot is 22.

TABLE 1

Table 2 defines the maximum number of non-overlapping CCEs for which the terminal device performs channel estimation at most in one slot for different subcarrier spacings defined by the current protocol. μ in table 2 represents an index of subcarrier spacing (Sub-carrier spacing) indicating that the corresponding subcarrier is 2 ^μ X 15kHz. When the terminal equipment blindly detects PDCCH of a certain aggregation level, channel estimation is carried out on the position of CCE occupied by the PDCCH of the aggregation level, and then PDCCH decoding can be carried out. Assuming that the aggregation level is 2, channel estimation of 2 CCEs is required. From this point of view, the maximum number of CCEs that do not overlap may also be considered as the number of CCEs of 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 the cell is 15kHz, the maximum number of CCEs that can be channel estimated in one slot is 56; when the subcarrier spacing of the cell is 60kHz, the maximum number of CCEs that can be channel estimated in one slot is 32.

TABLE 2

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 candidate PDCCHs and/or the maximum number of non-overlapping CCEs that can be blind detected in one slot. In the blind detection, the terminal device needs to ensure that the number of the candidate PDCCHs in the actual blind detection does not exceed the maximum number of the candidate PDCCHs shown in the table 1 and/or ensure that the number of the non-overlapping CCEs in the actual blind detection does not exceed the number of the non-overlapping CCEs shown in the table 2.

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

it is currently specified that if the maximum number of cells supported by the terminal device is 4, i.e. the terminal device supports at most 4 cells, and the network device sends configuration information to the terminal device, it is configured thatThe downlink cell, when->At this time, or if the terminal device reports to the network device the number of downlink cells that can be detected +.>And the network device configures the terminal device with +.>The downlink cell, when->When the blind detection capability of the terminal equipment in one slot of the scheduling cell is the sum of the blind detection capability of each slot of all the scheduled cells, namely the blind detection capability of each scheduled cell is equal to the actual blind detection capability of the scheduled cell in one slot on the scheduling cell and in one slot. Here, a- >Refers to a subcarrier spacing of 2 configured by the network device to the terminal device ^μ Number of 15kHz downlink cells.

For example, the terminal device supports 4 downlink cells at most, the network device configures 3 downlink cells for the terminal device, the subcarrier interval of 2 downlink cells in the 3 downlink cells is 15kHz, the subcarrier interval of one downlink cell is 30kHz, when the terminal device schedules the 3 downlink cells in the scheduling cell, the 3 downlink cells are all scheduled cells, and then the blind detection capability of the terminal device in one slot of the scheduling cell is the sum of the blind detection capability of the terminal device in one slot of two scheduled cells of 15kHz and the blind detection capability of the terminal device in 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, according to table 2, it can be determined that the maximum number of non-overlapping CCEs in one slot of a 15kHz scheduled cell is 56, the maximum number of non-overlapping CCEs in one slot of a 30kHz scheduled cell is 56, the maximum number of non-overlapping CCEs in one slot of each 15kHz scheduled cell is 56, the maximum number of non-overlapping CCEs in one slot of the 30kHz scheduled cell is 56, and the total maximum number of non-overlapping CCEs in one slot of the scheduled cell is 56×2+56. For example, according to table 1, it may be determined that the maximum number of candidate PDCCHs in one slot of the 15kHz scheduled cell is 44, the maximum number of candidate PDCCHs that can be monitored by a terminal device in one slot of the 30kHz scheduled cell is 36, then on the scheduled cell, the maximum number of candidate PDCCHs that can be monitored by a terminal device in one slot of the 15kHz scheduled cell is 44, the maximum number of candidate PDCCHs that can be monitored by a terminal device in one slot of the 30kHz scheduled cell is 36, and the total maximum number of non-overlapping CCEs in one slot of the scheduled cell is 44×2+36.

If the terminal equipment reports the number of the downlink cells capable of detecting the PDCCH to the network equipmentAnd the network device is provided with->Downstream cell, and->The terminal device has an interval of 2 for all sub-carriers on the scheduling cell ^μ Blind detection capability of a scheduled cell of x 15kHz in one slot ∈>The following formula (1) is satisfied:

at the publicIn the formula (1), the components are as follows,represents a rounding down, which applies equally hereinafter,/-in>Indicating a subcarrier spacing of 2 ^μ The maximum blind detection capability of each slot of each cell of x 15kHz may specifically take the values in table 1 or table 2, j represents the index of the subcarrier interval, and the subcarrier interval corresponding to j is 2 ^j ×15Khz，/>Indicating a subcarrier spacing of 2 ^j Number of downlink cells of x 15 kHz.

The terminal device is 2 for each subcarrier spacing on the scheduling cell ^μ The blind detection capability of the terminal equipment of the scheduled cell with the frequency of x 15kHz is as follows: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 may support 5 downlink cells when reporting to the network device, where the network device configures 6 downlink cells for the terminal device, where 1 downlink cell has a subcarrier spacing of 15kHz, 2 downlink cells have a subcarrier spacing of 60kHz, and 3 downlink cells have a subcarrier spacing of 30 kHz. And if the terminal equipment schedules the 6 downlink cells in the scheduling cell, wherein the 6 downlink cells are all scheduled cells, the number of the scheduling cells is larger than the number of the cells which can be supported by the terminal equipment. Assuming that the blind detection capability is the maximum number of CCEs that do not overlap, then the blind detection capability on the primary cell can be calculated according to equation (1) and table 2 above:

The blind detection capability for each slot of all 15kHz scheduled cells is: 5×56×1/6=46.67, and after rounding down, 46 is obtained.

The capability of each slot for all 30kHz scheduled cells is: 5×56×3/6=140, which is the total blind detection capability of each slot of all 30kHz scheduled cells, the terminal device needs to ensure that the blind detection capability of each slot of each scheduled cell is 56 when blind detection is performed.

The capability of each slot for all 60kHz scheduled cells is: 5×48×2/6=93, which is the total blind detection capability of each slot of all the 60kHz scheduled cells, the terminal device needs to ensure that the blind detection capability of each slot of each scheduled cell is 48 when blind detection is performed.

On the primary scheduling cell, therefore, the scheduling capability of each slot is: 46+140+93.

Assuming that the blind detection capability is the maximum number of PDCCH candidates, the blind detection capability on the primary tone 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=36.67, and after rounding down, 46 is obtained.

The capability of each slot for all 30kHz scheduled cells is: 5×36×3/6=90, which is the total blind detection capability of each slot of all 30kHz scheduled cells, the terminal device needs to ensure that the blind detection capability of each slot of each scheduled cell is 56 when blind detection is performed.

The capability of each slot for all 60kHz scheduled cells is: 5×22×2/6=36.67, and after rounding down, 36 is obtained. This is the total blind detection capability of each slot of all 60kHz scheduled cells, and the terminal device needs to ensure that the blind detection capability of each slot of each scheduled cell is 48.

On the primary scheduling cell, therefore, the scheduling capability of each slot is: 36+90+36.

Third, in a single carrier scenario, and the terminal device determines the blind detection capability within one span.

Assuming that when the subcarrier spacing of a cell is 15kHz, if 7 spans exist in one slot, for example, the terminal device determines that the maximum number of CCEs that are not overlapped in each span is 16, the maximum number of CCEs that are not overlapped in one slot is 16×7=112, compared with the first case that the maximum number of CCEs that are not overlapped and defined in each slot is 56 in a single carrier scenario, the number of CCEs that are supported in one slot is doubled, which is equivalent to increasing the capability of blind detection, so that the PDCCH can be ensured to be transmitted with a larger aggregation level, that is, more CCEs can be occupied, therefore, the reliability of the PDCCH can be improved, and the reliability of the service can be ensured.

The following describes 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.

Step one: and reporting the span patterns and blind detection capability corresponding to each span pattern by the terminal equipment.

Table 3 shows the pattern definitions listing the span, and the blind detection capability of each span pattern at each span.

TABLE 3 Table 3

In Table 3, which may include a plurality of span patterns, 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，μ The second blind detection capability subcarrier spacing is 2 ^μ The number of maximum non-overlapping CCEs per span or the number of maximum PDCCH candidates per span corresponding to the ith span pattern of x 15 kHz.

For each row, for example, the parameter (X, Y) corresponding to the i-th row refers to: the terminal equipment can maximally support that every Y symbols are divided into one span, and the minimum interval between every two adjacent spans is X symbols, that is to say, the span determined by the terminal equipment 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，μ Representing if the terminalThe span pattern determined by the terminal equipment accords with the span pattern of the ith row, and the blind detection capacity corresponding to each span of the terminal equipment is C ^i，μ Specifically, after the span pattern and the subcarrier interval of the cell are determined, the second blind detection capability corresponding to a certain span pattern of the subcarrier interval 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 PDCCH candidates.

In order to ensure that the capability of the terminal device for actually performing PDCCH blind detection does not exceed the maximum blind detection capability of the terminal device, the terminal device may report one or more rows in report 3 to the network device. Table 3 lists only 3 span patterns, and may actually include a plurality of span patterns, and may have a value of 0 or 1. In this embodiment, the span pattern has 3 values of 0, 1, 2 or 3, and the corresponding parameters (2, 3), (4, 3) or (7, 3) are taken as examples, which are only examples for understanding the technical scheme of the present invention, and the present invention is not limited to the above scheme.

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

And the network equipment receives the span patterns reported by the terminal equipment in the previous step and blind detection capacity corresponding to each span pattern. And then, configuring some information for PDCCH blind detection of the terminal equipment, and transmitting the configuration information to the terminal equipment. 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 (control resource set, CORESET), and/or multiple search spaces, among others. 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 one CORESET, and each search space may specify a search space identification, the search space type and/or aggregation level, and the number of PDCCH candidates per aggregation level, the periodicity of the search space, the offset, and blind detection start symbols, etc., the offset referring to a particular slot in the search space period. Thus, 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 occalation.

The procedure for determining PDCCH occalation 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, and the period is in units of slots, such as 2 slots, and the offset is, for example, the 2 nd slot in the period of the search space. Typically, the number of symbols contained in a slot is fixed, e.g., 14. To facilitate determining the position of the symbols, the numbers "0-13" or "1-14" may be used to indicate the position of 14 symbols in a slot. For ease of illustration, the positions of the 14 symbols in a slot are illustrated in the present application using the numbers "0-13".

The blind detection start symbol, that is, which specific positions in the slots determined by the offset are used for PDCCH blind detection, that is, the start symbol position indicating the PDCCH blind detection time, may be indicated by using a 14bit bitmap (bitmap), for example, the 14bit bitmap is 10101010101010, that is, the PDCCH blind detection needs to be performed at the positions of the 1 st, 3 rd, 5 th, 7 th, 9 th, 11 th and 13 th symbols in one slot. Assuming a period of 2 slots, a bias of 2 nd slot, a CORESET of 3 symbols, and a bitmap of 14 bits of 10001000100000, the PDCCH occalasion of slots 0-4 is shown in FIG. 1. There are 3 PDCCHs occalation in slot1 and slot3, respectively, wherein the first PDCCH occalation is from symbol 0 to symbol 2, the second PDCCH occalation is from symbol 4 to symbol 6, and the third PDCCH occalation is from symbol 8 to symbol 10 in slot 1. The shaded portion in fig. 1 illustrates PDCCH occalation.

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

the terminal device first determines a bitmap, which is assumed to be a 14-bit (bit) bitmap. In the 14-bit bitmap, the PDCCH occasin is indicated at a position having a value of 1, and values of other positions are 0 except for the position having the value of 1. As shown in fig. 1, assuming that PDCCH occalation determined by the terminal device is as PDCCH occalation in slot1 of fig. 1, the determined bitmap of 14 bits is: 11101110111000. this bitmap starts with the first 1 symbol, and for the beginning of the first span, determines the span length, i.e., the number of symbols occupied by the span, as: max (max (CORESET number of symbols), min (Y)), i.e., the number of symbols of span is: the number of CORESET symbols is the maximum value of the minimum Y values of all parameters (X, Y) corresponding to all span patterns reported by the terminal device, and then the length of each span is the length. After determining the first span, find the position of the first 1 in the bitmap of the next symbol which is not covered by the first span, determine the second span, that is, the second span is that after the first span, from the symbol of the first 1, and so on, determine the actual span pattern of the terminal device.

For example: the terminal device receives configuration information, where the configuration information configures 2 CORESETs to CORESET1 and CORESET2, where CORESET1 is 1 symbol, CORESET2 is 2 symbols, CORESET1 is associated with 2 search spaces, it is determined according to the foregoing method that the corresponding PDCCH occalation of search space 1 is shaded portion 1 in fig. 2, it is determined that the corresponding PDCCH occalation of search space 2 is shaded portion 2 in fig. 2, CORESET2 is associated with 1 search space, and if it is determined according to the foregoing method that the corresponding PDCCH occalation of search space 2 is shaded portion 3 in fig. 2, then the terminal device may determine that a 14bit bitmap is 01100110010100, as shaded portion 4 in fig. 2.

Assume that in step one, 3 span patterns are reported by the terminal device, and the corresponding parameters (X, Y) are (2, 2), (4, 3) and (7, 3), respectively. The number of symbols per span determined according to the above procedure is max (max (CORESET number of symbols), min (Y))=max (2, 2) =2, e.g. the first 1 is determined in the 14bit bitmap 01100110010100 to be at symbol 1, the first span starts at symbol 1 and is 2 symbols in length, i.e. the first span starts at symbol 1 to symbol 2, and the second span starts at symbol 5 and is 2 symbols in length, i.e. the second span starts at symbol 5 to symbol 6. By analogy, the third span is from symbol 9 to symbol 10 and the fourth span is from 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 from which the blind detection capability of each span can be determined.

The terminal device determines that parameters (X, Y) corresponding to certain span patterns in parameters (X, Y) corresponding to the reported span patterns are closest to parameters (X ', Y') corresponding to the determined actual span patterns, that is, determines that the actual span pattern and which reported span pattern are the most consistent, and defines the reported span pattern as a legal span pattern. Thereby determining the blind detection capability of each span as the second blind detection capability corresponding to the legal span pattern. If there are a plurality of legal span patterns, the maximum value of the second blind detection capability corresponding to the legal span patterns is defined as the blind detection capability of each span.

The following describes how to determine the actual span pattern and which reported span pattern best match, i.e. how to determine the legal span pattern.

The maximum number of symbols that can be supported for a span in an actual span pattern is Y ', and the minimum value of the interval between adjacent 2 spans is defined as X'. If the parameters (X, Y) corresponding to the reported span pattern satisfy that X is less than or equal to X 'and Y is greater than or equal to Y', the span pattern is legal.

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 of the 4 spans is 2, so Y' =2 is determined. These 4 spans are defined as a first span, a second span, a third span, and a fourth span in this order, where 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, the interval between the fourth span and the third span is 2 symbols, and the minimum value of the interval is determined to be 2, that is, X' =2. The parameters (X, Y) corresponding to the first span pattern (2, 2) in the reported span patterns satisfy that X is less than or equal to X ', and Y is greater than or equal to Y', so that the first span pattern is a legal span pattern. The 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 Y is greater than or equal to Y', so that the second span pattern is not a legal span pattern. The 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 Y is greater than or equal to Y', so that the third span pattern is not a legal span pattern. 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 corresponding parameter of (2, 2) in the reported span pattern according to the span pattern.

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

In the third case described above, the terminal device supports single carrier and per-span blind detection capability per 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 that the terminal device has a larger blind detection capability at each span of the scheduling cell, i.e. needs that the terminal device can detect more candidate PDCCHs or carry out channel estimation at each span, for which there is no clear scheme at present.

In view of this, a technical solution of the embodiment of the present application is provided. The blind detection capability of the terminal equipment in each span of each scheduling cell can be clarified in the carrier aggregation scene. Meanwhile, the embodiment of the application increases the blind detection capability of each span of the scheduling cell, namely the terminal equipment has larger blind detection capability, so as to ensure the time delay and the reliability of the service. Meanwhile, in the scene of cross-carrier scheduling, all downlink cells can be normally scheduled.

The technical scheme provided by the embodiment of the application can be used for wireless communication systems, such as a 4.5G system or a 5G system, 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 according to an embodiment of the present application. The network device and 6 terminal devices are included in fig. 3, which may be cellular telephones, 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 may all be connected to a network device. All six terminal devices are capable of communicating with the network device. For example, the terminal device may be a narrowband terminal device, such as an mctc terminal device; the terminal device may be a broadband terminal device, for example an NR terminal device of the existing 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, eNB in a fourth generation mobile communication technology (the fourth generation, 4G) system and gNB in a 5G system.

The network architecture to which embodiments of the present application apply may also be a public land mobile network (Public Land Mobile Network, PLMN) network, a device-to-device (D2D) network, a machine-to-machine (machine to machine, M2M) network, an IoT network, or other networks.

The technical scheme provided by the embodiment of the application is described below with reference to the accompanying drawings.

The embodiment of the application provides a communication method, and in the following description, the method is taken as an example applied to the network architecture shown in fig. 3. In addition, the method may be performed by two communication devices, such as a first communication apparatus and a second communication apparatus. The first communication device may be a network apparatus or a communication device capable of supporting a function required by the network apparatus to implement the method, or the first communication device may be a terminal apparatus or a communication device (e.g., a chip system) capable of supporting a function required by the terminal apparatus to implement the method. The same applies to the second communication apparatus, which may be a network device or a communication apparatus capable of supporting functions required by the network device to implement the method, or may be a terminal device or a communication apparatus (e.g., a chip system) capable of supporting functions required by the terminal device to implement the method. And there is no limitation on the implementation manner of the first communication apparatus and the second communication apparatus, for example, the first communication apparatus and the second communication apparatus are both terminal devices, or the first communication apparatus is a terminal device, and the second communication apparatus is a communication apparatus capable of supporting functions required for the terminal device to implement the method, and so on. Wherein the network device is, for example, a base station.

Referring to fig. 4, a flowchart of a communication method according to an embodiment of the present application is shown in the following description, where the method is performed by a network device and a terminal device, that is, a first communication apparatus is a terminal device, and a second communication apparatus is a network device. For example, if the method is applied to the network architecture shown in fig. 3, the first communication apparatus may be any one of the 6 terminal devices shown in fig. 3, and the second communication apparatus may be the network device shown in fig. 3. It should be noted that the embodiment of the present application is merely implemented by the network device and the 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 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 transmits 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 equipment in the embodiment of the application can support single carrier waves and also can support multiple carrier waves. So when the terminal device supports multiple carriers, that is, there is carrier aggregation, 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, through the first indication information, the number of downlink cells configured for the terminal device.

Illustratively, the first indication information may be carried in higher layer signaling or downlink control information (downlink control information, DCI), etc.

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

If the blind detection capability of the definition terminal equipment is strong, for example, the number of CCEs which can be detected by the definition terminal equipment in a period of time is large, so that the operation complexity of the terminal equipment is high, and the cost of the definition terminal equipment is high. And the terminal equipment monitors more CCE numbers, so that the power consumption overhead of the terminal equipment for detecting the PDCCH is increased. Therefore, a lower blind detection capability can be defined for the terminal equipment so as to reduce the operation complexity and cost of the terminal equipment. 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 schedule the PDCCH with a large aggregation level, so that low-delay and high-reliability service transmission cannot be guaranteed.

Therefore, the blind detection capability of the terminal equipment needs to be reasonably defined so as to meet the requirement of low-delay and high-reliability of the service. The blind detection capability of the terminal device in the three cases in the foregoing is currently defined, but it is not defined yet how to determine the blind detection capability of the terminal device at each span in the CA scenario.

In the carrier aggregation scenario, the embodiment of the application can determine the blind detection capability of the terminal equipment in each span of each scheduling cell, such as the first blind detection capability. 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 scheduling according to the number of downlink cells, or may be considered as determining the first blind detection capability of the terminal device in a certain downlink cell. Since it is aimed at in the CA scenario, at least two cells, namely a scheduling cell and a tuned cell, are involved. For convenience of description, hereinafter, taking determining the first blind detection capability of the terminal device in the scheduling cell as an example, how to determine the first blind detection capability of the terminal device according to the number of downlink cells is described.

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

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

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

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

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

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, it is assumed that the first value is 6, in particular:

the first capability, i.e. the first blind detection capability of the terminal device in the scheduling cell, is the sum of the first blind detection capability 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 of cell 1, cell 2 and cell 3 is 15kHz and the subcarrier spacing of cell 4 and cell 5 is 30kHz. Assume that the span pattern reported by the terminal device is (4, 3), and (7, 3). According to Table 3, the corresponding blind detection capability at 15kHz is C ^2，0 And C ^2，1 The corresponding blind detection capability at 30kHz is C ^3，0 And C ^3，1 . Suppose C ^2，1 ＞C ^2，0 ，C ^3，1 ＞C ^3，0 。

For cell 1, assuming that the actual span pattern is determined to be as shown in fig. 5 according to step two in case three, 3 spans are included in one slot, and the first blind detection capability of cell 1 in each span is determined to be C according to step three in case three ^2，0 The method comprises the steps of carrying out a first treatment on the surface of the Similarly, for cell 2, it may be determined that the actual span pattern is shown in fig. 5, where one slot includes 1 span, and the first blind detection capability of cell 2 in each span is C ^2，1 The method comprises the steps of carrying out a first treatment on the surface of the For cell 3, it may be determined that the actual span pattern is as shown in fig. 5, where one slot includes 2 spans, and the first blind detection capability of cell 3 at each span is C ^2，1 The method comprises the steps of carrying out a first treatment on the surface of the For cell 4, it may be determined that the actual span pattern is shown in fig. 5, where one slot includes 1 span, and the first blind detection capability of cell 4 at each span is C ^3，1 The method comprises the steps of carrying out a first treatment on the surface of the For cell 5, the actual span pattern may be determined to be a graph5, comprising 2 spans in one slot, the first blind detection capability of the cell 5 in 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, then 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 The method comprises the steps of carrying out a first treatment on the surface of the For another example, assuming that 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 . It can be seen that 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 cell is cell 1 and cell 3, the first blind detection capability of the terminal equipment on the scheduling cell for the scheduled cell 1 is the first blind detection capability of cell 1, and the first blind detection capability of the terminal equipment on the scheduling cell for the scheduled cell 3 is the first blind detection capability of cell 3; if the scheduling cell is cell 1, the scheduled cell is cell 1 and cell 4, the first blind detection capability of the terminal equipment on the scheduling cell for the scheduled cell 1 is the first blind detection capability of cell 1, and the first blind detection capability of the terminal equipment on the scheduling cell for the scheduled cell 4 is the first blind detection capability of cell 4. Therefore, in the cross-carrier scheduling scene, 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 the service in the scheduled cell are ensured.

The second capability, i.e. 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 capability 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 of the first blind detection capability in all the scheduled cells.

For example, please continue with fig. 5, assume that the scheduling cell is cell 1, the tuned cell is cell 1 and smallZone 3, then all the scheduled cells are cell 1 and cell 3. The maximum value of the first blind detection capability in all the scheduled cells is c2=max (C ^2，0 ，C ^3，1 ) 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 both cell 1 and cell 3 is C2. It can be seen that the blind detection capability of the terminal device in the scheduling cell increases proportionally with 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, thereby ensuring low time delay and high reliability of the service in the scheduled cell.

The third capability, namely the first blind detection capability C 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 ^j ×15kHz，K ^j Indicating a subcarrier spacing of 2 in all scheduled cells ^j Maximum value of first blind detection capability of x 15kHz scheduled cell, L ^j Subcarrier spacing of 2 for all scheduled cells ^j The number of scheduled cells is multiplied by 15kHz, and J is a positive integer. In other words, the interval is 2 for each subcarrier in the scheduling cell ^j The first blind detection capability of the scheduled cells with the multiplied by 15kHz is that the subcarrier spacing is 2 ^j Maximum value of first blind detection capability of the scheduled cell x 15 kHz.

For example, please continue to refer to fig. 5,j for 0 or 1. All the 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 a subcarrier spacing of 15kHz, i.e. cell 1 to cell 3, when i.e. j=0, K ^j For max (C ^2，0 ，C ^2，1 ，C ^2，1 )＝C ^2，1 ，L ^j =3 cells, then for each scheduling cell with a subcarrier spacing of 15kHz, the scheduling cellFirst blind detection capability C ^2，1 The method comprises the steps of carrying out a first treatment on the surface of the When j=1, for the scheduling cells with a subcarrier spacing of 30kHz, namely cell 4 and cell 5,K ^j For max (C ^3，0 ，C ^3，1 )＝C ^3，1 ，L ^j =2, there are 2 cells, then for each scheduling cell with a subcarrier spacing of 30kHz, a first blind detection capability C of the scheduling cell ^3，1 The method comprises the steps of carrying out a first treatment on the surface of the I.e. 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 is 2 for the subcarriers ^j The first blind detection capability of the scheduled cell with the x 15kHz is the product of the maximum first blind detection capability of the scheduled cell with the subcarrier interval in all the scheduled cells and the number of the scheduled cells with the subcarrier interval, so that the terminal equipment has the maximum first blind detection capability to carry out blind detection on PDCCH of the scheduled cell in each scheduled cell with the subcarrier interval, and the low time delay and high reliability of the service in the scheduled cells are ensured.

The fourth capability, 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 ^j ×15kHz，K ^j Indicating a subcarrier spacing of 2 in all scheduled cells ^j Minimum value of first blind detection capability of x 15kHz scheduled cell, L ^j Sub-carrier spacing of 2 for all scheduled cells ^j The number of scheduled cells is multiplied by 15kHz, and J is a positive integer.

For example, please continue to refer to fig. 5,j for 0 or 1. All the 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 a subcarrier spacing of 15kHz, i.e. cell 1 to cell 3, when i.e. j=0, K ^j For min (C) ^2，0 ，C ^2，1 ，C ^2，1 )＝C ^2，0 ，L ^j =3 cells, then for each scheduling cell with a subcarrier spacing of 15kHz, toneFirst blind detection capability C of a degree cell ^2，0 The method comprises the steps of carrying out a first treatment on the surface of the When j=1, for the scheduling cells with a subcarrier spacing of 30kHz, namely cell 4 and cell 5,K ^j For min (C) ^3，1 ，C ^3，0 )＝C ^3，0 ，L ^j =2, there are 2 cells, then for each scheduling cell with a subcarrier spacing of 30kHz, a first blind detection capability C of the scheduling cell ^3，0 The method comprises the steps of carrying out a first treatment on the surface of the I.e. 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 ^j The first blind detection capability of the scheduled cell with the multiplied by x 15kHz is the product of the minimum first blind detection capability of the scheduled cell with the subcarrier interval and the number of the scheduled cells with the subcarrier interval, so that the scheduled cell with each subcarrier interval is guaranteed, the terminal equipment has the minimum first blind detection capability to blindly detect the PDCCH of the scheduled cell, the first blind detection capability of the terminal equipment in the scheduled cell is not excessive under the scene of carrier aggregation (namely, the normal scheduling of the scheduled cell is guaranteed), and the power loss of the terminal equipment is reduced.

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

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

The first blind detection capability of the terminal equipment 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 ^j Indicating a subcarrier spacing of 2 in all scheduled cells ^j Maximum value of first blind detection capability of x 15kHz scheduled cell, L ^j Subcarrier spacing of 2 for all scheduled cells ^j The number of the scheduled cells is multiplied by 15kHz, J is a positive integer, N is the number of the scheduled cells, and M is the number of the downlink cellsA number. In other words, the scheduling cell is 2 for subcarrier spacing ^j The first blind detection capability of the scheduling cell of x 15kHz isIt should be noted that, here, the downward rounding is taken as an example, and the upward rounding or rounding may be also taken as a rounding, and the following applies, which is not limited by the embodiment of the present application.

For example, please continue to refer to fig. 5,j for 0 or 1. All the scheduled cells are cell 1, cell 2, cell 3, cell 4 and cell 5. N=4, m=5.

When j=0, K is for a scheduling cell with a subcarrier spacing of 15kHz ^j For max (C ^2，0 ，C ^2，1 ，C ^2，1 )＝C ^2，1 ，L ^j =3, 3 cells, the first blind detection capability of the scheduling cell is for all scheduling cells with carrier spacing of 15kHzWhen j=1, for the scheduling cells with a subcarrier spacing of 30kHz, namely cell 4 and cell 5,K ^j For max (C ^3，1 ，C ^3，0 )＝C ^3，1 ，L ^j For a scheduling cell with a total carrier spacing of 30kHz, the first blind detection capability of the scheduling cell is +.> I.e. 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 blind detection cells that the terminal device can support, at this time, if the subcarrier spacing of all the scheduled cells is still 2 ^j ×15kHz，K ^j Indicating a subcarrier spacing of 2 in all scheduled cells ^j Maximum first blind detection capability of the scheduled cell of x 15kHz, then the maximum first blind detection capability for this subcarrier spacing should be nxk ^j But the number of scheduling cells of the actual subcarrier spacing is L ^j Occupy only all downlink cellsThus, for subcarrier spacing of 2 ^j The total first blind detection capability of the scheduling cell of x 15kHz is +. >Namely, calculating the maximum first blind detection capability of all the scheduled cells with small subcarrier intervals, and then adopting the same mode for the scheduled cells with certain subcarrier intervals, so as to calculate the sum of the maximum first blind detection capability of all the scheduled cells with all the subcarrier intervals as the blind detection capability of all the scheduled cells with all the subcarrier intervals in the scheduling cells. Therefore, the first blind detection capability of the scheduling cell is not increased in proportion to the increase of the number of the downlink cells without limitation, but is limited by the number of the blind detection cells which can be supported by the terminal equipment, and 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, 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 implementation 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 ^j Indicating a subcarrier spacing of 2 in all scheduled cells ^j Minimum value of first blind detection capability of x 15kHz scheduled cell, L ^j Sub-carrier spacing of 2 for all scheduled cells ^j The number of the scheduled cells is multiplied by 15kHz, J is a positive integer, N is a first numerical value, and M is the number of the downlink cells.

When j=0, K is for a scheduling cell with a subcarrier spacing of 15kHz ^j For min (C) ^2，0 ，C ^2，1 ，C ^2，1 )＝C ^2，0 ，L ^j =3, 3 cells, the first blind detection capability of the scheduling cell is for all scheduling cells with subcarrier spacing of 15kHzWhen j=1, for scheduling cells with a subcarrier spacing of 30kHz, i.e. cell 5 and cell 4, k ^j For min (C) ^3，0 ，C ^3，1 )＝C ^3，0 ，L ^j For a scheduling cell with all 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 blind detection cells that the terminal device can support, at this time, it is assumed that the subcarrier spacing according to all the scheduled cells is 2 ^j ×15kHz，K ^j Indicating a subcarrier spacing of 2 in all scheduled cells ^j Scheduled small x 15kHzThe minimum value of the first blind detection capability of the zone should be N x K for this subcarrier spacing ^j But the number of scheduling cells of the actual subcarrier spacing is L ^j Occupy only the whole downlink cellThus, for subcarrier spacing of 2 ^j The total first blind detection capability of the scheduling cell of x 15kHz is +.>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 as the sum of the minimum first blind detection capability of all the scheduled cells in all the subcarrier interval. Therefore, the first blind detection capability of the scheduling cell is not increased in proportion to the increase of the number of the downlink cells without limitation, 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, and the power consumption and the implementation complexity of the terminal equipment are reduced.

A seventh capability, wherein the first blind detection capability of the terminal equipment in the scheduling cell is that

Wherein j represents the index of the subcarrier spacing, and the subcarrier spacing corresponding to j is 2 ^j X 15kHz, J is a positive integer, L ^j Sub-carrier spacing of 2 for all scheduled cells ^j The number of the scheduled cells is multiplied by 15kHz, and M is the number of the downlink cells; q (Q) ^j Equal toWherein i is the index of span patterns, H is the number of span patterns, ++>Representing the number of downlink cells corresponding to span pattern with index of i, C ⁱ Representing the second blind detection capability corresponding to the span pattern indexed i.

The second blind detection capability is the maximum non-overlapping CCE number of each span corresponding to each span pattern, or the number of the maximum candidate physical downlink control channels PDCCH of each span corresponding to each span pattern, when the terminal device reports the span pattern to the network device.

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

When j=0, Q ^j Is C ^2，0 ×2+C ^2，1 ，L ^j For a scheduling cell with all subcarrier spacing of 15kHz, the first blind detection capability of the scheduling cell isWhen j=1, for scheduling cells with a subcarrier spacing of 30kHz, i.e. cell 4 and cell 5, q ^j Is C ^3，0 +C ^3，1 ，L ^j =2, then for all scheduling cells with subcarrier spacing of 30kHz, small is scheduledThe first blind detection capacity of the zone is +.>That is, the first blind detection capability of the scheduling cell is +.>

With this scheme, the subcarrier spacing is 2 ^j The second blind detection capability corresponding to the span pattern with index i of x 15kHz, namely the subcarrier interval reported by the terminal equipment is 2 ^j Blind detection capability per span of each span pattern x 15kHz, determining the subcarrier spacing to be 2 ^j And the first blind detection capability of the scheduling cell with the multiplied by 15kHz is obtained, and then the blind detection capability of the scheduling cell with all subcarrier intervals is summed to obtain the blind detection capability with small scheduling. Under the scene of carrier aggregation, the first blind detection capability of the scheduling cells is not increased in proportion to the increase of the number of the downlink cells without limitation, 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 cells is ensured not to exceed the blind detection capability which can be supported by the terminal equipment, and the power consumption and the implementation complexity of the terminal equipment are reduced.

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

The terminal device may perform PDCCH blind detection in the scheduling cell according to the determined first blind detection capability, and the network device sends PDCCH in the scheduling cell based on the first blind detection capability. The method for determining the first blind detection by the network device may refer to a method for determining the first blind detection by the terminal device, which is not described herein.

The first blind detection capability is determined by the terminal equipment according to the number of the downlink cells configured by the network equipment, and the blind detection capability of the terminal equipment in each span of each scheduling cell can be defined under the scene of carrier aggregation by the scheme.

In addition, in the method, under the scene of carrier aggregation, the blind detection capability of the dispatching cells is increased in proportion to the number of the dispatched cells, namely, the first scheme can increase the blind detection capability of each span of the dispatching cells, namely, the terminal equipment has larger blind detection capability, so as to ensure the time delay and the reliability of the service. Meanwhile, in the scene of cross-carrier scheduling, all downlink cells can be normally scheduled.

In the embodiment provided by the application, the method provided by the embodiment of the application is introduced from the interaction point of the terminal equipment and the network equipment. 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 hardware structures and/or software modules, and implement the functions in the form of hardware structures, software modules, or a combination of hardware structures and software modules. Some of the functions described above are performed in a hardware configuration, a software module, or a combination of hardware and software modules, depending on the specific application of the solution and design constraints.

Communication devices for implementing the above method in the embodiments of the present application are described below with reference to the accompanying drawings. Therefore, the above contents can be used in the following embodiments, and repeated contents are not repeated.

Fig. 6 is a schematic block diagram of a communication device 600 of an embodiment of the present application. The communication device 600 is capable of performing the actions and functions of the terminal device in the above-described method embodiments, and in order to avoid repetition, details are not described here. The communication device 600 may be a terminal device or a chip applied to the terminal device. The communication apparatus 600 includes: a processing unit 610 and a transceiver 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 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, and the first blind detection capability is a maximum number of CCEs that are not overlapped in each time window span or a maximum number of PDCCH candidates in each span, and a time domain length of the span is smaller than a time domain length of one 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:

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

In an exemplary embodiment, 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 a product of a maximum value of the first blind detection capability of all the scheduled cells and the number of the scheduled cells.

Exemplary, 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 isWherein j represents the index of the subcarrier spacing, and the subcarrier spacing corresponding to j is 2 ^j ×15kHz，K ^j Indicating a subcarrier spacing of 2 in all scheduled cells ^j Maximum value of first blind detection capability of x 15kHz scheduled cell, L ^j Subcarrier spacing of 2 for all scheduled cells ^j The number of scheduled cells is multiplied by 15kHz, and J is a positive integer.

The number of the downlink cells is smaller than or equal to a first value, and the determined first blind detection capability of the scheduling cell isWherein j represents the index of the subcarrier spacing, and j corresponds to the subcarrier spacingThe distance is 2 ^j ×15kHz，K ^j Indicating a subcarrier spacing of 2 in all scheduled cells ^j Minimum value of first blind detection capability of x 15kHz scheduled cell, L ^j Subcarrier spacing of 2 for all scheduled cells ^j The number of scheduled cells is multiplied by 15kHz, and J is a positive integer.

The number of the downlink cells is greater than a first value, and the determined first blind detection capability of the scheduling cell isWherein j represents the index of the subcarrier spacing, and the subcarrier spacing corresponding to j is 2 ^j ×15kHz，K ^j Indicating a subcarrier spacing of 2 in all scheduled cells ^j Maximum value of first blind detection capability of x 15kHz scheduled cell, L ^j Subcarrier spacing of 2 for all scheduled cells ^j The number of the scheduled cells is multiplied by 15kHz, J is a positive integer, N is the number of the scheduled cells, and M is the number of the downlink cells.

The number of the downlink cells is greater than a first value, and the determined first blind detection capability of the scheduling cell isWherein j represents the index of the subcarrier spacing, and the subcarrier spacing corresponding to j is 2 ^j ×15kHz，K ^j Indicating a subcarrier spacing of 2 in all scheduled cells ^j Minimum value of first blind detection capability of x 15kHz scheduled cell, L ^j Sub-carrier spacing of 2 for all scheduled cells ^j The number of the scheduled cells is multiplied by 15kHz, J is a positive integer, N is the number of the scheduled cells, and M is the number of the downlink cells.

The number of the downlink cells is greater than a first value, and the determined first blind detection capability of the scheduling cell isWherein j represents a subcarrier spacing indexThe subcarrier spacing corresponding to index j is 2 ^j X 15kHz, J is a positive integer, L ^j Sub-carrier spacing of 2 for all scheduled cells ^j The number of the scheduled cells is multiplied by 15kHz, and M is the number of the downlink cells; q (Q) ^j Equal to->Wherein i is the subcarrier spacing of 2 ^j Index of span pattern of x 15kHz, H is subcarrier spacing of 2 ^j Number of span patterns of x 15kHz, +.>Indicating a subcarrier spacing of 2 ^j The number of downlink cells corresponding to span pattern with index of i of x 15kHz, C ⁱ Indicating a subcarrier spacing of 2 ^j Second blind detection capability corresponding to span pattern of index i x 15 kHz.

All relevant contents of each step related to the above method embodiment may be cited to the functional description of the corresponding functional module, which is not described herein.

Fig. 7 is a schematic block diagram of a communication device 700 of an embodiment of the present application. The communication apparatus 700 is capable of performing the behavioural functions of the network device in the above-described method embodiments, and in order to avoid repetition, details are not described here. The communication apparatus 700 may be a network device or a chip applied to the 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 a number of control channel elements CCEs that are the largest and non-overlapping of each time window span or a number of largest candidate physical downlink control channel PDCCHs of each time window span, and 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 send PDCCHs in the scheduling cell according to the first blind detection capability.

Fig. 8 is a schematic block diagram of a communication device 800 of an embodiment of the present application. The communication apparatus 800 is capable of executing the steps executed by the terminal device in the above-described method embodiment, and may also be used to execute the steps executed by the network device in the above-described method embodiment, which will not be described in detail herein in order to avoid repetition. The communication device 800 may be a terminal device, or may be a chip applied to the terminal device, and the communication device 800 may be a network device, or may be a chip applied to the 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 for executing a program in the memory 810, the processor 830 being configured to receive first indication information through the communication interface 820, the first indication information indicating the number of downlink cells when the program is executed; and the first blind detection capability of the scheduling cell is determined according to the number of the downlink cells indicated by the first indication information received by the receiving and transmitting unit, and PDCCH blind detection is performed in the scheduling cell according to the first blind detection capability, wherein the scheduling cell is a cell in the downlink cell, the first blind detection capability is the maximum non-overlapping CCE number of each time window span or the maximum candidate PDCCH number of each span, and the time domain length of the span is smaller than the time domain length of one 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 a number of downlink cells, and determine, according to the number of 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, where the first blind detection capability is a maximum number of CCEs that are not overlapped by each time window span or a maximum number of candidate PDCCHs of each span, where a time domain length of the span is less than a time domain length of one time slot, and send, according to the determined first blind detection capability, a PDCCH in the scheduling cell through the communication interface 820.

It should be appreciated that the communication device 800 shown in fig. 8 may be a chip or a circuit. For example, a chip or circuit may be provided in the terminal device or a chip or circuit may be provided in the 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, where 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 send signals, so as to complete 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. Which are the same physical entities, may be collectively referred to as transceivers. The memory 810 may be integrated in the processor 830 or may be provided separately from the processor 830.

As an implementation, 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 between the communication interface 820, the processor 830, and the memory 810 is not limited in the embodiment of the present application. The embodiment of the present application is shown in fig. 8 as a bus connection between the memory 810, the processor 830, and the communication interface 820, where the bus is shown in fig. 8 by a thick line, and the connection between other components is merely illustrative and not limited thereto. The buses may be classified as address buses, data buses, control buses, etc. For ease of illustration, only one thick line is shown in fig. 8, but not only one bus or one type of bus.

In an embodiment of the present application, 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, where the methods, steps, and logic blocks disclosed in the embodiments of the present application may be implemented or performed. The 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 embodied directly in a hardware processor for execution, or in a combination of hardware and software modules in the processor for execution.

In an embodiment of the present application, the memory 810 may be a nonvolatile memory, such as a hard disk (HDD) or a Solid State Drive (SSD), or may be a volatile memory (volatile memory), 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 embodiments of the present application may also be circuitry or any other device capable of performing memory functions for storing program instructions and/or data.

The communication device in the above embodiment may be a terminal device, a circuit, a chip applied to the terminal device, or other combination devices, components, etc. having the functions of the terminal device. The transceiver unit may be a transceiver when the communication device is a terminal device, may include an antenna, a radio frequency circuit, etc., and the processing module may be a processor, for example: a central processing unit (central processing unit, CPU). When the communication device is a component having the above-mentioned terminal device function, 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 one possible design structure of the terminal device involved in the above-described embodiment. The terminal device comprises 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 described in the above embodiment via an antenna. On the downlink, an antenna receives downlink signals (DCI) transmitted by the network device in the above embodiments. The receiver 902 is configured to receive downlink signals (DCI) received from an antenna. In the modem processor 905, an encoder 906 receives traffic data and signaling messages to be transmitted on the uplink and processes the traffic data and signaling messages. A modulator 907 further processes (e.g., symbol maps and modulates) the encoded 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 that are sent to the terminal device. The encoder 906, modulator 907, demodulator 909, and decoder 908 may be implemented by a synthesized modem processor 905. These units are handled according to the radio access technology employed by the radio access network.

The controller/processor 903 controls and manages the actions of the terminal device, and is used to perform the processing performed by the terminal device in the above embodiment. For example, the method is used for controlling a terminal device to receive first indication information from a network device, determining first blind detection capability of a scheduling cell according to the number of downlink cells indicated by the received first indication information, 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 cell, and the first blind detection capability is the maximum number of non-overlapping CCEs of each span or the maximum number of candidate PDCCHs of each span, and the time domain length of the span is smaller than the time domain length of one time slot and/or other processes of the technology described in the present application. As an example, the controller/processor 903 is used to support the terminal device to perform the process S402 in fig. 4.

Fig. 10 shows a simplified schematic structure of a communication device. For ease of understanding and ease of illustration, in fig. 10, the communication apparatus takes a network device as an example. The network device may be applied to the system shown in fig. 3, and may be the network device in fig. 3, and perform the functions of the network device in the foregoing method embodiment. The network device 1000 may include one or more radio frequency units, such as a remote radio frequency unit (remote radio unit, RRU) 1010 and one or more baseband units (BBU) (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, alternatively may be referred to as a transceiver, a transceiver circuit, or a transceiver, etc., which may include at least one antenna 1011 and a radio frequency unit 1012. The RRU 1010 is mainly configured to receive and transmit a radio frequency signal and convert the radio frequency signal to a baseband signal, for example, to send indication information to a terminal device. The BBU 1020 is mainly configured to perform baseband processing, control a base station, and the like. The RRU 1010 and BBU 1020 may be physically located together or physically separate, 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 performing baseband processing functions, such as channel coding, multiplexing, modulation, spreading, and so on. For example, the BBU (processing module) may be configured to control the base station to perform the operation procedure related to the network device in the above method embodiment, for example, generate the above indication information, etc.

In one example, the BBU 1020 may be configured by one or more single boards, where the multiple single boards may support a single access radio access network (such as an LTE network) together, or may support different access radio access networks (such as an LTE network, a 5G network, or other networks) respectively. The BBU 1020 further comprises 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 perform the operation procedures related to the network device in the above-described method embodiment. The memory 1021 and processor 1022 may serve one or more boards. That is, the memory and the processor may be separately provided on each board. It is also possible that multiple boards share the same memory and processor. In addition, each single board can be provided with necessary circuits.

The embodiment of the application also provides a communication system, in particular to the communication system which comprises the terminal equipment and the network equipment, or more terminal equipment and network equipment can be further included.

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 embodiment, and the description is omitted here.

Embodiments of the present application also provide a computer-readable storage medium comprising instructions that, when executed on a computer, cause the computer to perform the method performed by the terminal device and the network device of fig. 4.

Embodiments of the present application also provide a computer program product comprising instructions which, when run on a computer, cause the computer to perform the method performed by the terminal device and the network device of fig. 4.

The embodiment of the application provides a chip system, which comprises a processor and can also comprise a memory, wherein the memory is used for realizing the functions of terminal equipment and network equipment in the method. The chip system may be formed of a chip or may 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 solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

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

In the several embodiments provided by the present application, it should be understood that the above-described apparatus embodiments are merely illustrative, for example, the division of the units is merely a logic function division, and there may be other division manners in which a plurality of units or components may be combined or may be integrated into another system, or some features may be omitted, or not performed. Alternatively, the communications links shown or discussed may be indirect coupling or communications links through interfaces, devices or units, which may be electrical, mechanical, or other.

In addition, each unit in the embodiment of the device of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit.

It is to be appreciated that the processor in embodiments of the application may be a central processing unit (central processing unit, CPU), other general purpose processor, digital signal processor (digital signal processor, DSP), application specific integrated circuit (application specific integrated circuit, ASIC), field programmable gate array (field programmable gate array, FPGA) or other programmable logic device, transistor logic device, hardware components, or any combination thereof. The general purpose processor may be a microprocessor, but in the alternative, it may be any conventional processor.

The methods in 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 computer network, or other programmable apparatus. The computer program or instructions may be stored in or transmitted from one computer-readable storage medium to another, e.g., a website, computer, server, or data center, via a wired (e.g., coaxial cable, fiber optic, digital subscriber line (digital subscriber line, simply DSL), or wireless (e.g., infrared, wireless, microwave, etc.) connection to another website, computer, server, or data center, e.g., a magnetic medium (e.g., floppy disk, hard disk, tape), an optical medium (e.g., digital video disc (digital video disc, DVD)), or a semiconductor medium (e.g., SSD), etc.

An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium. In the alternative, the storage medium may 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 terminal device. The processor and the storage medium may reside as discrete components in a transmitting device or a receiving device.

In various embodiments of the application, where no special description or logic conflict exists, terms and/or descriptions between the various embodiments are consistent and may reference each other, and features of the various embodiments may be combined to form new embodiments based on their inherent logic.

It will be appreciated that the various numerical numbers referred to in the embodiments of the present application are merely for ease of description and are not intended to limit the scope of the embodiments of the present application. The sequence number of each process does not mean the sequence of the execution sequence, and the execution sequence of each process should be determined according to the function and the internal logic.

It will be apparent to those skilled in the art that various modifications and variations can be made to the present application without departing from the scope of the application. Thus, it is intended that the present application also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.

Claims

1. 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 cell, the first blind detection capability is the number of control channel elements CCE which are not overlapped maximally for each time window span or the number of maximum candidate physical downlink control channel PDCCHs for each time window span, and the time domain length of the span is smaller than the time domain length of one time slot;

and performing PDCCH blind detection in the scheduling cell according to the first blind detection capability.

2. The method of claim 1, wherein the number of downlink cells is less than or equal to a first value, the determined first blind detection capability of the scheduling cell comprising:

a sum of first blind detection capabilities of each of all the scheduled cells; or,

the product of the maximum value of the first blind detection capability in all the scheduled cells and the number of the scheduled cells.

3. 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 ^j Indicating a subcarrier spacing of 2 in all scheduled cells ^j Maximum value of first blind detection capability of x 15kHz scheduled cell, L ^j For all scheduled cellsThe interval of the sub-carriers is 2 ^j The number of scheduled cells is multiplied by 15kHz, and J is a positive integer.

4. The method of claim 1, wherein the number of downlink cells is greater than a first value, and the determined first blind detection capability of the scheduling cell isWherein j represents the index of the subcarrier spacing, and the subcarrier spacing corresponding to j is 2 ^j ×15kHz，K ^j Indicating a subcarrier spacing of 2 in all scheduled cells ^j Maximum value of first blind detection capability of x 15kHz scheduled cell, L ^j Subcarrier spacing of 2 for all scheduled cells ^j The number of the scheduled cells is multiplied by 15kHz, J is a positive integer, N is the number of the scheduled cells, and M is the number of the downlink cells.

5. The method of claim 1, wherein the number of downlink cells is greater than a first value, and the determined first blind detection capability of the scheduling cell isWherein j represents the index of the subcarrier spacing, and the subcarrier spacing corresponding to j is 2 ^j X 15kHz, J is a positive integer, L ^j Subcarrier spacing of 2 for all scheduled cells ^j The number of the scheduled cells of x 15kHz, M is the number of the downlink cells, Q ^j Is->Where i is the subcarrier spacing of 2 ^j Index of span pattern of x 15kHz, H is subcarrier spacing of 2 ^j Number of span patterns of x 15kHz, +.>Indicating a subcarrier spacing of 2 ^j ×15kHz is the number of downlink cells corresponding to the span pattern with index of i, C ⁱ Indicating a subcarrier spacing of 2 ^j Second blind detection capability corresponding to span pattern of index i x 15 kHz.

6. The method of any one of claims 2-5, wherein the method further comprises:

a first blind detection capability of each of the scheduled cells is determined.

7. The method of any one of claims 2-5, wherein the method further comprises:

and sending second indicating information, wherein the second indicating information is used for indicating the first numerical value.

8. A method of communication, comprising:

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

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

And transmitting PDCCH in the dispatching cell according to the first blind detection capability.

9. 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 comprises:

10. 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 isWherein j represents the index of the subcarrier spacing, and the subcarrier spacing corresponding to j is 2 ^j ×15kHz，K ^j Indicating a subcarrier spacing of 2 in all scheduled cells ^j Maximum value of first blind detection capability of x 15kHz scheduled cell, L ^j Subcarrier spacing of 2 for all scheduled cells ^j The number of scheduled cells is multiplied by 15kHz, and J is a positive integer.

11. The method of claim 8, 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 ^j ×15kHz，K ^j Indicating a subcarrier spacing of 2 in all scheduled cells ^j Maximum value of first blind detection capability of x 15kHz scheduled cell, L ^j Subcarrier spacing of 2 for all scheduled cells ^j The number of the scheduled cells is multiplied by 15kHz, J is a positive integer, N is the number of the scheduled cells, and M is the number of the downlink cells.

12. The method of claim 8, 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 isWhere j represents a subcarrierIndex of interval, subcarrier interval corresponding to j is 2 ^j X 15kHz, J is a positive integer, L ^j Subcarrier spacing of 2 for all scheduled cells ^j The number of the scheduled cells of x 15kHz, M is the number of the downlink cells, Q ^j Is->Wherein i is the subcarrier spacing of 2 ^j Index of span pattern of x 15kHz, H is subcarrier spacing of 2 ^j Number of span patterns of x 15kHz, +.>Indicating a subcarrier spacing of 2 ^j The number of downlink cells corresponding to span pattern with index of i of x 15kHz, C ⁱ Indicating a subcarrier spacing of 2 ^j Second blind detection capability corresponding to span pattern of index i x 15 kHz.

13. The method of any one of claims 9-12, wherein the method further comprises:

a first blind detection capability of each cell of the scheduled cells of the terminal device is determined.

14. The method of any one of claims 9-12, wherein the method further comprises:

and receiving second indication information, wherein the second indication information is used for indicating the first numerical value.

15. A communication device, comprising:

the receiving and transmitting unit is used for receiving first indication information, wherein the first indication information indicates the number of downlink cells;

and the processing unit is used for determining 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 transmitting 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 cell, the first blind detection capability is the number of control channel elements CCE which are not overlapped maximally of each time window span or the number of physical downlink control channel PDCCHs which are candidate maximally of each time window span, and the time domain length of span is smaller than the time domain length of one time slot.

16. The communication apparatus of claim 15, wherein the processing unit is specifically configured to determine, when the number of downlink cells is less than or equal to a first value, a first blind detection capability of the scheduling cell as:

17. The communications apparatus of claim 15, wherein the processing unit is configured to determine a first blind detection capability of the scheduling cell as the first blind detection capability when the number of downlink cells is less than or equal to a first valueWherein j represents the index of the subcarrier spacing, and the subcarrier spacing corresponding to j is 2 ^j ×15kHz，K ^j Indicating a subcarrier spacing of 2 in all scheduled cells ^j Maximum value of first blind detection capability of x 15kHz scheduled cell, L ^j Subcarrier spacing of 2 for all scheduled cells ^j The number of scheduled cells is multiplied by 15kHz, and J is a positive integer.

18. The communications apparatus of claim 15, wherein the processing unit is operative to determine a first blind detection capability of the scheduling cell as Wherein j represents the index of the subcarrier spacing, and the subcarrier spacing corresponding to j is 2 ^j ×15kHz，K ^j Indicating a subcarrier spacing of 2 in all scheduled cells ^j Maximum value of first blind detection capability of x 15kHz scheduled cell, L ^j Subcarrier spacing of 2 for all scheduled cells ^j The number of the scheduled cells is multiplied by 15kHz, J is a positive integer, N is the number of the scheduled cells, and M is the number of the downlink cells.

19. The communication device of claim 15, wherein the processing unit is specifically configured to determine a first blind detection capability of the scheduling cell asWherein j represents the index of the subcarrier spacing, and the subcarrier spacing corresponding to j is 2 ^j X 15kHz, J is a positive integer, L ^j Subcarrier spacing of 2 for all scheduled cells ^j The number of the scheduled cells of x 15kHz, M is the number of the downlink cells, Q ^j Is->i is subcarrier spacing of 2 ^j Index of span pattern of x 15kHz, H is subcarrier spacing of 2 ^j Number of span patterns of x 15kHz, +.>Indicating a subcarrier spacing of 2 ^j The number of downlink cells corresponding to span pattern with index of i of x 15kHz, C ⁱ Indicating a subcarrier spacing of 2 ^j Second blind detection capability corresponding to span pattern of index i x 15 kHz.

20. The communication device according to any of claims 16-19, wherein the processing unit is further configured to:

21. The communication device according to any of the claims 16-19, wherein the transceiver unit is further configured to:

22. A communication device, comprising:

the receiving and transmitting unit is used for transmitting first indication information, wherein the first indication information indicates the number of downlink cells;

the processing unit is used for determining 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 cell, the first blind detection capability is the number of control channel elements CCE which are not overlapped maximally for each time window span or the number of physical downlink control channel PDCCHs which are candidate maximally for each time window span, and the time domain length of the span is smaller than the time domain length of one time slot;

the receiving and transmitting unit is configured to transmit a PDCCH in the scheduling cell according to the first blind detection capability determined by the processing unit.

23. The communication apparatus of claim 22, wherein the processing unit is specifically configured to determine, when the number of downlink cells is less than or equal to a first value, a first blind detection capability of the terminal device in a scheduling cell is:

24. The communications apparatus of claim 22, wherein the processing unit is configured to determine that the terminal device is tuning when the number of downlink cells is less than or equal to a first valueThe first blind detection capability of the degree cell is thatWherein j represents the index of the subcarrier spacing, and the subcarrier spacing corresponding to j is 2 ^j ×15kHz，K ^j Indicating a subcarrier spacing of 2 in all scheduled cells ^j Maximum value of first blind detection capability of x 15kHz scheduled cell, L ^j Subcarrier spacing of 2 for all scheduled cells ^j The number of scheduled cells is multiplied by 15kHz, and J is a positive integer.

25. The communications apparatus of claim 22, wherein the processing unit is configured to determine a first blind detection capability of the terminal device in a scheduling cell as Wherein j represents the index of the subcarrier spacing, and the subcarrier spacing corresponding to j is 2 ^j ×15kHz，K ^j Indicating a subcarrier spacing of 2 in all scheduled cells ^j Maximum value of first blind detection capability of x 15kHz scheduled cell, L ^j Subcarrier spacing of 2 for all scheduled cells ^j The number of the scheduled cells is multiplied by 15kHz, J is a positive integer, N is the number of the scheduled cells, and M is the number of the downlink cells.

26. The communications apparatus of claim 22, wherein the processing unit is configured to determine a first blind detection capability of the terminal device in a scheduling cell asWherein j represents the index of the subcarrier spacing, and the subcarrier spacing corresponding to j is 2 ^j X 15kHz, J is a positive integer, L ^j Subcarrier spacing of 2 for all scheduled cells ^j Modulated of x 15kHzThe number of the degree cells, M is the number of the downlink cells, Q ^j Equal to->Wherein i is the subcarrier spacing of 2 ^j Index of span pattern of x 15kHz, H is subcarrier spacing of 2 ^j Number of span patterns of x 15kHz, +.>Indicating a subcarrier spacing of 2 ^j The number of downlink cells corresponding to span pattern with index of i of x 15kHz, C ⁱ Indicating a subcarrier spacing of 2 ^j Second blind detection capability corresponding to span pattern of index i x 15 kHz.

27. The communication device according to any of claims 23-26, wherein the processing unit is further configured to:

28. The communication device according to any of claims 23-26, wherein the transceiver unit is further configured to:

29. A communication device, characterized in that it comprises a processor connected to a memory for storing a computer program, the processor being adapted to execute the computer program stored in the memory, such that the device implements the method according to any of claims 1-7 or 8-14.

30. 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 one of claims 1-7 or 8-14.