CN110351004B

CN110351004B - Communication method and communication device

Info

Publication number: CN110351004B
Application number: CN201810299516.9A
Authority: CN
Inventors: 陈铮; 张旭; 薛丽霞
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2018-04-04
Filing date: 2018-04-04
Publication date: 2021-02-09
Anticipated expiration: 2038-04-04
Also published as: CN110351004A

Abstract

The application provides a communication method and a communication device, wherein the communication method comprises the following steps: receiving first indication information sent by a network device, where the first indication information is used to indicate M types of downlink control information format DCI formats, where the M types of DCI formats correspond to X types of original downlink control information size DCI size, M and X are positive integers, and X is greater than Z, where Z is a number of DCI size types that can be detected by the terminal device in a time unit; determining N kinds of detection downlink control information size DCI sizes for Y kinds of DCI formats in the M kinds of DCI formats, wherein N is a positive integer and is less than or equal to Z, and Y is a positive integer less than or equal to M; and detecting the downlink control channel according to the N detection DCI sizes, thereby improving the flexibility and the efficiency of communication.

Description

Communication method and communication device

Technical Field

The present embodiments relate to the field of communications, and in particular, to a communication method and a communication device.

Background

Currently, a method for transmitting Downlink control information is known, in which a terminal device may detect a Downlink control channel (e.g., a Physical Downlink Control Channel (PDCCH)) according to a Downlink Control Information (DCI) format (format) and a DCI size (size) notified by a network device, so as to obtain the Downlink control information from the Downlink control channel.

However, limited by the capability of the terminal device, i.e. the number of DCI sizes that the terminal device can detect within the same time period is limited, for example, the terminal device can only detect based on X different DCI sizes within the same time period (such as in one slot), for example, X may be equal to 4.

In view of the above, in the prior art, a mapping relationship between DCI formats and DCI sizes may be defined, so that a network device may notify a plurality of DCI formats that a terminal device needs to detect, and both of them may determine a plurality of DCI sizes based on the plurality of DCI formats and the mapping relationship, and the number of the plurality of DCI sizes is less than or equal to X.

Therefore, based on the above manner, the DCI size types of the DCI formats that can be detected by the terminal device and the network device in the same time period may be smaller than the value X, the maximum capability of the terminal device to detect the DCI size is not fully utilized, and the possibility of detecting more DCI formats in the same time period is lost, thereby limiting the scheduling capability of the system and affecting the flexibility and efficiency of communication.

Disclosure of Invention

The application provides a communication method and a communication device, which can improve the flexibility and efficiency of communication.

In a first aspect, a communication method is provided, including: receiving first indication information sent by a network device, where the first indication information is used to indicate M types of downlink control information format DCI formats, where the M types of DCI formats correspond to X types of original downlink control information size DCI size, M and X are positive integers, and X is greater than Z, where Z is a number of DCI size types that can be detected by the terminal device in a time unit; determining N kinds of detection downlink control information size DCI sizes for Y kinds of DCI formats in the M kinds of DCI formats, wherein N is a positive integer and is less than or equal to Z, and Y is a positive integer less than or equal to M; and detecting the downlink control channel according to the N detection DCI sizes.

According to the communication method, when the number X of the types of the original DCI sizes corresponding to the M DCI formats is greater than the number Z of the types of DCI sizes that can be detected by the terminal device in a time unit, N types of detected DCI sizes are re-determined for Y types of DCI formats among the M types of DCI formats, and a downlink control channel is detected based on the N types of detected DCI sizes, where N is less than or equal to X.

Optionally, the determining N detection DCI sizes for Y DCI formats of the M DCI formats includes: and determining the N detection DCI sizes from the M DCI formats according to the priority of each DCI format in the M DCI formats.

According to the communication method, the N detection DCI sizes are determined based on the priority of the DCI format, the determined N detection DCI sizes can meet the transmission requirement of the high-priority DCI format, and therefore the practicability and the universality of the communication method can be further improved.

Optionally, the determining the N detection DCI sizes from the M DCI formats according to the priority of each of the M DCI formats includes: if at least two of the Y DCI formats correspond to a first priority, determining that an original DCI size corresponding to the at least two DCI formats is a first DCI size corresponding to the first priority, where the first DCI size is one of the N detection DCI sizes, and where DCI sizes corresponding to different priorities are different.

That is, in this application, at least one specific DCI size is included in the N detected DCI sizes, the specific corresponding priority includes at least two DCI formats, original DCI sizes corresponding to the at least two DCI formats are the same, and the specific DCI size is the original DCI size corresponding to the at least two DCI formats.

According to the communication method, the original DCI size corresponding to the high-priority DCI format is used as the low-priority DCI format to detect the DCI size, so that the transmission of the low-priority DCI format can be further realized on the basis of meeting the transmission requirement of the high-priority DCI format, and the reliability and the accuracy of the communication method can be improved.

Optionally, the N detection DCI sizes respectively correspond to N priorities, and determining the N detection DCI sizes includes, for Y DCI formats of the M DCI formats: if the priority corresponding to the second DCI format of the Y DCI formats is lower than the N priorities, determining that the detected DCI size corresponding to the second DCI format is the second DCI size, where the second DCI size is the DCI size of the N detected DCI sizes.

Optionally, the second DCI size is larger than the original DCI size corresponding to the second DCI format.

Optionally, the second DCI size is a smallest DCI size of the N detected DCI sizes that is larger than the original DCI size corresponding to the second DCI format.

Therefore, the change of the DCI for the priority DCI format can be minimized, and the efficiency of the communication method of the present application can be improved.

Optionally, DCI carried by the DCI format corresponding to the maximum K DCI sizes of the N detected DCI sizes is scrambled using a cell radio network temporary identity C-RNTI, where K is a positive integer less than or equal to N.

Optionally, the determining N detection DCI sizes for Y DCI formats of the M DCI formats includes: receiving second indication information sent by the network device, where the second indication information is used to indicate N DCI format groups, each DCI format group includes at least one DCI format of the M DCI formats, and the N DCI format groups are in one-to-one correspondence with the N detected DCI sizes; and determining the detection DCI size corresponding to each DCI format of the M kinds of DCI formats according to the DCI format group to which each DCI format belongs in the M kinds of DCI formats, wherein Y is equal to M.

According to the communication method, the same detection DCI size is configured for each DCI format in the same DCI format group, so that N is less than or equal to Z can be easily achieved, and therefore the practicability and efficiency of the communication method can be further improved.

Optionally, the detected DCI size corresponding to each DCI format group in the N DCI format groups is an original DCI size corresponding to a third DCI format in each DCI format group.

Optionally, the third DCI format is a DCI format with a largest original DCI size corresponding to each DCI format group.

Therefore, the transmission of the DCI of all the DCI formats in the same DCI format group can be reliably realized.

In a second aspect, a communication method is provided, including: determining N kinds of detected downlink control information size DCI sizes for Y kinds of DCI formats in M kinds of downlink control information format DCI formats, wherein the M kinds of DCI formats correspond to X kinds of original DCI sizes, M and X are positive integers, X is larger than Z, Z is the number of the DCI size types which can be detected by terminal equipment in a time unit, N is a positive integer, N is smaller than or equal to Z, and Y is a positive integer smaller than or equal to M; first indication information sent to the terminal device, where the first indication information is used to indicate the M types of DCI formats; and sending the downlink control channel according to the N detection DCI sizes.

Optionally, the determining the N detection DCI sizes from the M DCI formats according to the priority of each of the M DCI formats includes: if at least two of the Y DCI formats correspond to a first priority, determining that an original DCI size corresponding to the at least two DCI formats is a first DCI size corresponding to the first priority, wherein the first DCI size is one of the N detection DCI sizes, and the DCI sizes corresponding to different priorities are different.

Optionally, the N detection DCI sizes respectively correspond to N priorities, and determining the N detection DCI sizes includes, for Y DCI formats of the M DCI formats: if the priority corresponding to the second DCI format in the Y DCI formats is lower than the N priorities, determining that the detection DCI size corresponding to the second DCI format is the second DCI size, wherein the second DCI size is the DCI size in the N detection DCI sizes.

Optionally, the second DCI size is a smallest DCI size of the N detection DCI sizes that is larger than the original DCI size corresponding to the second DCI format.

Optionally, the determining N types of DCI sizes for Y types of DCI formats of the M types of DCI formats includes: determining N DCI format groups, wherein each DCI format group comprises at least one DCI format in the M DCI formats, and the N DCI format groups correspond to the N detection DCI sizes in a one-to-one mode; determining a detection DCI size corresponding to each DCI format of the M kinds of DCI formats according to the DCI format group to which each DCI format of the M kinds of DCI formats belongs, wherein Y is equal to M; and the communication method further comprises: and sending second indication information to the terminal equipment, wherein the second indication information is used for indicating the N DCI format groups.

In a third aspect, a communication method is provided, including: receiving first indication information and second indication information sent by network equipment, where the first indication information is used to indicate M types of DCI formats, where the M types of DCI formats correspond to X types of original downlink control information size DCI sizes, M and X are positive integers, and the second indication information is used to indicate N DCI format groups, each DCI format group includes at least one DCI format in the M types of DCI formats, the N DCI format groups are in one-to-one correspondence with N detected DCI sizes, N is a positive integer, and N is not greater than X; determining a detection DCI size corresponding to each DCI format of the M DCI formats according to the DCI format group to which each DCI format of the M DCI formats belongs; and detecting the downlink control channel according to the N detection DCI sizes.

According to the communication method, the N detection DCI sizes are determined for the M DCI formats, and the downlink control channel is detected based on the N detection DCI sizes, wherein N is not more than X, so that the DCI size needing to be detected can be reduced, the communication efficiency can be improved, and the equipment burden can be reduced.

In addition, according to the communication method of the present application, by configuring the same detection DCI size for each DCI format in the same DCI format group, it is possible to easily achieve N equal to or less than Z, and thus, the practicality and efficiency of the communication method of the present application can be further improved.

In a fourth aspect, a communication method is provided, including: determining N DCI format groups, wherein each DCI format group comprises at least one DCI format in M DCI formats, the N DCI format groups correspond to N detection DCI sizes one by one, the M DCI formats correspond to X original DCI sizes, X, M and N are positive integers, and N is not more than X; determining a detection DCI size corresponding to each DCI format of the M kinds of DCI formats according to the DCI format group to which each DCI format of the M kinds of DCI formats belongs; sending first indication information and second indication information to terminal equipment, wherein the first indication information is used for indicating the M DCI formats, and the second indication information is used for indicating the N DCI format groups; and sending the downlink control channel according to the N detection DCI sizes.

In a fifth aspect, a communication device is provided, which includes means for performing the steps of the communication method in any one of the first to fourth aspects and implementations thereof.

In one design, the communication device is a communication chip that may include an input circuit or interface for sending information or data and an output circuit or interface for receiving information or data.

In another design, the communication device is a communication device (e.g., a terminal device or a network device, etc.), and the communication chip may include a transmitter for transmitting information or data and a receiver for receiving information or data.

A sixth aspect provides a communication device, comprising a processor and a memory, wherein the memory is used for storing a computer program, and the processor is used for calling and running the computer program from the memory, so that the communication device executes the communication method in any one of the first aspect to the fourth aspect and the implementation manners thereof.

Optionally, the number of the processors is one or more, and the number of the memories is one or more.

Alternatively, the memory may be integral to the processor or provided separately from the processor.

Optionally, the communication device further comprises a transmitter (transmitter) and a receiver (receiver).

In a seventh aspect, a computer program product is provided, the computer program product comprising: a computer program (which may also be referred to as code, or instructions), which when executed, causes a computer to perform the communication method of any of the first to fourth aspects and implementations thereof described above.

In an eighth aspect, a computer-readable medium is provided, which stores a computer program (which may also be referred to as code or instructions) that, when executed on a computer, causes the computer to perform the communication method in any one of the first to fourth aspects and implementations thereof.

In a ninth aspect, a chip system is provided, which includes a memory for storing a computer program and a processor for calling and running the computer program from the memory, so that a communication device installed with the chip system executes the communication method in any one of the first to fourth aspects and implementations thereof.

The system-on-chip may include, among other things, input circuitry or interfaces for transmitting information or data, and output circuitry or interfaces for receiving information or data.

Drawings

Fig. 1 is a schematic architecture diagram of a communication system of the present application.

Fig. 2 is a schematic interaction diagram of an example of the communication method of the present application.

Fig. 3 is a schematic interaction diagram of another example of the communication method of the present application.

Fig. 4 is a schematic block diagram of another example of a communication apparatus of the present application.

Fig. 5 is a schematic block diagram of another example of a communication apparatus of the present application.

Fig. 6 is a schematic block diagram of an example of a terminal device of the present application.

Fig. 7 is a schematic block diagram of an example of a network device of the present application.

Detailed Description

The technical solution in the present application will be described below with reference to the accompanying drawings.

The technical scheme of the embodiment of the application can be applied to various communication systems, for example: a Global System for Mobile communications (GSM) System, a Code Division Multiple Access (CDMA) System, a Wideband Code Division Multiple Access (WCDMA) System, a General Packet Radio Service (GPRS), a Long Term Evolution (Long Term Evolution, LTE) System, an LTE Frequency Division Duplex (FDD) System, an LTE Time Division Duplex (TDD), a Universal Mobile Telecommunications System (UMTS), a Worldwide Interoperability for Microwave Access (WiMAX) communication System, a future fifth Generation (5G) System, or a New Radio Network (NR), etc.

By way of example, and not limitation, in embodiments of the present application, a terminal device may also be referred to as a User Equipment (UE), an access terminal, a subscriber unit, a subscriber station, a mobile station, a remote terminal, a mobile device, a User terminal, a wireless communication device, a User agent, or a User Equipment. The terminal device may be a Station (ST) in a WLAN, and may be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA) device, a handheld device with Wireless communication function, a computing device or other processing device connected to a Wireless modem, a vehicle-mounted device, a wearable device, and a next generation communication system, for example, a terminal device in a 5G Network or a terminal device in a future-evolution Public Land Mobile Network (PLMN) Network, and the like.

By way of example and not limitation, in the embodiments of the present application, the terminal device may also be a wearable device. Wearable equipment can also be called wearable intelligent equipment, is the general term of applying wearable technique to carry out intelligent design, develop the equipment that can dress to daily wearing, like glasses, gloves, wrist-watch, dress and shoes etc.. A wearable device is a portable device that is worn directly on the body or integrated into the clothing or accessories of the user. The wearable device is not only a hardware device, but also realizes powerful functions through software support, data interaction and cloud interaction. The generalized wearable smart device includes full functionality, large size, and can implement full or partial functionality without relying on a smart phone, such as: smart watches or smart glasses and the like, and only focus on a certain type of application functions, and need to be used in cooperation with other devices such as smart phones, such as various smart bracelets for physical sign monitoring, smart jewelry and the like.

In addition, in the embodiment of the present application, the terminal device may also be a terminal device in an Internet of Things (IoT) system, the IoT is an important component of future information technology development, and the main technical feature of the IoT is to connect an object with a network through a communication technology, so as to implement an intelligent network with interconnected human-computer and interconnected objects.

In the embodiment of the present application, the IOT technology may achieve massive connection, deep coverage, and power saving for the terminal through a narrowband (Narrow Band) NB technology, for example. For example, the NB includes only one Resource Block (RB), i.e., the bandwidth of the NB is only 180 KB. The communication method according to the embodiment of the application can effectively solve the problem of congestion of the IOT technology mass terminals when the mass terminals access the network through the NB.

The network device may be an Access network device or other devices for communicating with a mobile device, and by way of example and not limitation, in this application, the network device may be an Access Point (AP) in a WLAN, a Base Station (BTS) in GSM or CDMA, a Base Station (NodeB, NB) in WCDMA, a gbb in a New Radio system (NR) system, an evolved Node B (eNB, eNodeB) in LTE, a relay Station or an Access Point, or an Access network device in a vehicle-mounted device, a wearable device, and an Access network device in a future 5G network or an Access network device in a future evolved PLMN network.

In addition, in this embodiment of the present application, the access network device provides a service for a cell, and the terminal device communicates with the access network device through a transmission resource (for example, a frequency domain resource or a spectrum resource) used by the cell, where the cell may be a cell corresponding to the access network device (for example, a base station), and the cell may belong to a macro base station or a base station corresponding to a Small cell (Small cell), where the Small cell may include: urban cells (Metro cells), Micro cells (Micro cells), Pico cells (Pico cells), Femto cells (Femto cells), and the like, and the small cells have the characteristics of small coverage area and low transmission power, and are suitable for providing high-rate data transmission services.

In addition, multiple cells can simultaneously work at the same frequency on a carrier in an LTE system or a 5G system, and under some special scenes, the concepts of the carrier and the cells can also be considered to be equivalent. For example, in a Carrier Aggregation (CA) scenario, when a secondary Carrier is configured for a UE, a Carrier index of the secondary Carrier and a Cell identity (Cell ID) of a secondary Cell operating on the secondary Carrier are carried at the same time, and in this case, the concepts of the Carrier and the Cell may be considered to be equivalent, for example, it is equivalent that the UE accesses one Carrier and one Cell.

The core network device may be connected with a plurality of access network devices for controlling the access network devices, and may distribute data received from a network side (e.g., the internet) to the access network devices.

The functions and specific implementations of the terminal device, the access network device and the core network device listed above are merely exemplary illustrations, and the present application is not limited thereto.

In the embodiment of the application, the terminal device or the network device includes a hardware layer, an operating system layer running on the hardware layer, and an application layer running on the operating system layer. The hardware layer includes hardware such as a Central Processing Unit (CPU), a Memory Management Unit (MMU), and a Memory (also referred to as a main Memory). The operating system may be any one or more computer operating systems that implement business processing through processes (processes), such as a Linux operating system, a Unix operating system, an Android operating system, an iOS operating system, or a windows operating system. The application layer comprises applications such as a browser, an address list, word processing software, instant messaging software and the like. Furthermore, the embodiment of the present application does not particularly limit the specific structure of the execution main body of the method provided by the embodiment of the present application, as long as the communication can be performed according to the method provided by the embodiment of the present application by running the program recorded with the code of the method provided by the embodiment of the present application, for example, the execution main body of the method provided by the embodiment of the present application may be a terminal device or a network device, or a functional module capable of calling the program and executing the program in the terminal device or the network device.

Moreover, various aspects or features of embodiments of the application may be implemented as a method, apparatus, or article of manufacture using standard programming and/or engineering techniques. The term "article of manufacture" as used herein is intended to encompass a computer program accessible from any computer-readable device, carrier, or media. For example, computer-readable media may include, but are not limited to: magnetic storage devices (e.g., hard disk, floppy disk, or magnetic tape), optical disks (e.g., Compact Disk (CD), Digital Versatile Disk (DVD), etc.), smart cards, and flash Memory devices (e.g., Erasable Programmable Read-Only Memory (EPROM), card, stick, or key drive, etc.). In addition, various storage media described herein can represent one or more devices and/or other machine-readable media for storing information. The term "machine-readable medium" can include, without being limited to, wireless channels and various other media capable of storing, containing, and/or carrying instruction(s) and/or data.

In this case, the application program executing the communication method according to the embodiment of the present application and the application program controlling the receiving end device to complete the action corresponding to the received data may be different application programs.

Fig. 1 is a schematic diagram of a system 100 to which a communication method according to an embodiment of the present invention can be applied. As shown in fig. 1, the system 100 includes an access network device 102, and the access network device 102 may include 1 antenna or multiple antennas, e.g.,

antennas

104, 106, 108, 110, 112, and 114. Additionally, the access network device 102 can additionally include a transmitter chain and a receiver chain, each of which can comprise a plurality of components associated with signal transmission and reception (e.g., processors, modulators, multiplexers, demodulators, demultiplexers, antennas, etc.), as will be appreciated by one skilled in the art.

Access network device 102 may communicate with a plurality of terminal devices, such as terminal device 116 and terminal device 122. However, it is understood that access network device 102 may communicate with any number of terminal devices similar to terminal device 116 or terminal device 122.

End devices

116 and 122 may be, for example, cellular phones, smart phones, laptops, handheld communication devices, handheld computing devices, satellite radios, global positioning systems, PDAs, and/or any other suitable device for communicating over wireless communication system 100.

As shown in fig. 1, terminal device 116 is in communication with

antennas

112 and 114, where

antennas

112 and 114 transmit information to terminal device 116 over a forward link (also called a downlink) 118 and receive information from terminal device 116 over a reverse link (also called an uplink) 120. In addition, terminal device 122 is in communication with

antennas

104 and 106, where

antennas

104 and 106 transmit information to terminal device 122 over forward link 124 and receive information from terminal device 122 over reverse link 126.

In a Frequency Division Duplex (FDD) system, forward link 118 can utilize a different Frequency band than reverse link 120, and forward link 124 can employ a different Frequency band than reverse link 126, for example.

As another example, in Time Division Duplex (TDD) systems and Full Duplex (Full Duplex) systems, forward link 118 and reverse link 120 may use a common frequency band and forward link 124 and reverse link 126 may use a common frequency band.

Each antenna (or group of antennas consisting of multiple antennas) and/or area designed for communication is referred to as a sector of the access network device 102. For example, antenna groups may be designed to communicate to terminal devices in a sector of the areas covered by access network device 102. The access network device may transmit signals to all terminal devices in its corresponding sector through single-antenna or multi-antenna transmit diversity. During communication by access network device 102 over forward links 118 and 124 with

terminal devices

116 and 122, respectively, the transmitting antennas of access network device 102 may also utilize beamforming to improve signal-to-noise ratio of forward links 118 and 124. Furthermore, mobile devices in neighboring cells may experience less interference when access network device 102 utilizes beamforming to transmit to

terminal devices

116 and 122 scattered randomly through an associated coverage area than if the access network device transmitted signals to all of its terminal devices through single or multiple antenna transmit diversity.

At a given time, access network device 102, terminal device 116, or terminal device 122 may be a wireless communication transmitting apparatus and/or a wireless communication receiving apparatus. When sending data, the wireless communication sending device may encode the data for transmission. Specifically, the wireless communication transmitting device may obtain (e.g., generate, receive from other communication devices, or save in memory, etc.) a number of data bits to be transmitted over the channel to the wireless communication receiving device. Such data bits may be contained in a transport block (or transport blocks) of data, which may be segmented to produce multiple code blocks.

In addition, the communication system 100 may be a PLMN network, a D2D network, an M2M network, an IoT network, or other networks, fig. 1 is a simplified schematic diagram for example, and other access network devices may be included in the network, which is not shown in fig. 1.

In the embodiment of the present application, data or information may be carried by time-frequency resources, where the time-frequency resources may include resources in a time domain and resources in a frequency domain. In the time domain, the time-frequency resource may include one or more time-domain units (or may also be referred to as time units), and in the frequency domain, the time-frequency resource may include frequency-domain units.

One time domain unit (also referred to as a time unit) may be one symbol, or one Mini-slot (Mini-slot), or one slot (slot), or one subframe (subframe), where the duration of one subframe in the time domain may be 1 millisecond (ms), one slot may be composed of 7 or 14 symbols, and one Mini-slot may include at least one symbol (e.g., 2 symbols or 7 symbols or 14 symbols, or any number of symbols less than or equal to 14 symbols).

A frequency domain unit may be a Resource Block (RB), or a group of Resource Blocks (RBG), or a predefined Subband (Subband).

In the embodiments of the present application, "data" or "information" may be understood as bits generated after an information block is coded, or "data" or "information" may be understood as modulation symbols generated after the information block is coded and modulated.

One information Block may include at least one Transport Block (Transport Block TB), or "one information Block may include at least one TB group (including at least one TB), or" one information Block may include at least one Code Block (Code Block, CB), or "one information Block may include at least one CB group (including at least one CB), and so on.

Hereinafter, DCI as a transmission target in the embodiment of the present invention will be described.

In the present application, the network device and the terminal device may transmit DCI based on the following parameters.

1. Downlink control information format (DCI format)

The DCI Format is used to define where a control information Field (Field) is located in DCI. For example, the downlink control information includes a bits, i.e., a₀，a₁，…，a_A-1。

The Most Significant Bit (MSB) in the first control information field in the downlink control information is mapped to the least numbered bit, i.e., a₀(ii) a The subsequent control information field is mapped to higher numbered bits.

Wherein the most significant bit in each control information field should be traced to the least numbered bit in that field.

By way of example and not limitation, in the present application, the DCI Format may include, but is not limited to, the Format shown in table 1 below.

TABLE 1

2. Downlink control information size (DCI size)

The DCI size is defined as the number of information bits included in the downlink control information, and if the DCI includes a information bits, the size of the downlink control information is a. Or, the size of the downlink control information is defined as the sum of the information bit number included in the DCI and the length of a Cyclic Redundancy Check (CRC); for example, DCI includes a information bits, the CRC length is L, and the DCI size of the DCI is equal to the value of a + L.

It should be understood that the relevant parameters of the DCI listed above are only exemplary, and the present application is not limited thereto, and for example, a slot format (slot format), a slot size, and the like may also be listed.

In a next generation communication system (e.g., 5G or NR), a terminal device acquires configuration information of a Search space set (Search space set) configured by a higher layer signaling, where the configuration information of the Search space set includes configuration information such as an Aggregation level (Aggregation level), a control information format (DCI format), a detection period (Monitoring periodicity), and a number of candidate control channels (PDCCH candidates) corresponding to the Aggregation level.

The candidate Control channel is formed by a plurality of Control Channel Elements (CCEs); under the condition that the UE detects the candidate control channels of different CCEs, multiple times of blind detection are needed; moreover, for candidate control channels including the same CCE, the DCI size is different, and multiple blind detections are also required. The increased search space set configured by the network device results in an increase in the complexity of detecting the PDCCH by the UE.

To limit the number of UE blind detections, the number of different DCI sizes detected by the UE is predefined within a given time slot, e.g.: the total DCI size detected by the UE cannot exceed 4, and the DCI size number detected by the UE to scramble the C-RNTI on the CRC cannot exceed 3. However, there are 8 total DCI formats that can be supported in the current standard, and potentially there may be 8 different DCI sizes, thus limiting the number of DCI formats per transmission based on this technique.

According to the communication method, the influence of the limitation of the number of the DCI sizes which can be detected by the terminal equipment on the number of the DCI formats transmitted each time can be effectively reduced.

Next, a detailed procedure of the communication method according to the embodiment of the present invention is described in detail with reference to fig. 2.

Fig. 2 shows a procedure for transmitting DCI of M formats at most in a Control Resource Set (Control Resource Set) by a network device # a (i.e., an example of a network device) and a terminal device # a (i.e., an example of a terminal device).

At S210, the network device # a may determine the DCI of the maximum M formats that needs to be transmitted to the terminal device # a in time unit # a (e.g., slot # a), i.e., the DCI carrying the maximum M DCI formats needs to be carried on the control resource set corresponding to time unit # a. Also, the network device # a may transmit, to the terminal device # a, indication information # a that may be used to indicate the M DCI formats. Thus, the terminal apparatus # a can determine that DCI of the M DCI formats needs to be detected on the set of control resources in time unit # a based on the indication information # a.

Wherein M is a positive integer.

The M DCI formats refer to a DCI format type, and may be, for example, DCI format0_0, DCI format1_1, and the like, as shown in table 1. A plurality of DCIs transmitted by the network device in a time unit may belong to the same DCI format type or may belong to different DCI format types.

And, the network device # a and the terminal device # a may determine the original DCI size corresponding to each DCI format of the M DCI formats.

The original DCI size is the total number of bits of all information fields (fields) in the DCI format before padding (pad) or truncating (truncate) bits.

The meaning of padding bits to the information field is: a certain number of bits are added before the MSB or after the LSB (Least Significant Bit) of the Bit sequence of the information field to form a new Bit sequence.

The meaning of truncating the bits to the information field is: a new sequence is formed by removing a part of bits from the upper bits to the lower bits or from the lower bits to the upper bits from the MSB or LSB of the bit sequence of the information field.

Specifically, in the present application, a mapping relationship # a may be pre-stored in the network device # a and the terminal device # a, and the mapping relationship # a may be used to indicate a DCI size corresponding to each of multiple DCI formats (including the M formats).

That is, an original DCI corresponding to a DCI format (e.g., DCI format # a) may refer to the DCI size corresponding to the DCI format # a indicated by the mapping relationship # a

For example, the multiple DCI formats may refer to all possible DCI formats specified by a communication system or a communication protocol.

By way of example and not limitation, as shown in table 1, the number of the plurality of DCI formats may be 8.

In the present application, each DCI format may correspond to 1 DCI size, or each DCI format may correspond to a plurality of (two or more) DCI sizes.

In the present application, between any two DCI formats (for example, DCI format #1 and DCI format #2), the DCI size corresponding to DCI format #1 may be the same as the DCI size corresponding to DCI format #2, or the DCI size corresponding to DCI format #1 may be different from the DCI size corresponding to DCI format #2, and the present application is not particularly limited.

Here, the "DCI size corresponding to DCI format #1 and DCI size corresponding to DCI format # 2" may be the same, and may refer to: if DCI format #1 corresponds to 1 DCI size and DCI format #2 corresponds to 1 DCI size, the DCI size corresponding to DCI format #1 is the same as the DCI size corresponding to DCI format # 2.

Alternatively, "DCI size corresponding to DCI format #1 may be the same as DCI size corresponding to DCI format # 2", may refer to: if DCI format #1 corresponds to a plurality of DCI sizes (referred to as DCI size set #1) and DCI format #2 corresponds to a plurality of DCI sizes (referred to as DCI size set #2), DCI size set #1 is the same as DCI size set # 2.

Further, "DCI size corresponding to DCI format #1 may be different from DCI size corresponding to DCI format # 2", may refer to: if DCI format #1 corresponds to 1 DCI size and DCI format #2 corresponds to 1 DCI size, the DCI size corresponding to DCI format #1 is different from the DCI size corresponding to DCI format # 2.

Alternatively, "DCI size corresponding to DCI format #1 may be different from DCI size corresponding to DCI format # 2", may refer to: if DCI format #1 corresponds to multiple DCI sizes (referred to as DCI size set #1) and DCI format #2 corresponds to multiple DCI sizes (referred to as DCI size set #2), the intersection of DCI size set #1 and DCI size set #2 is an empty set, or DCI size set #1 is a true subset of DCI size set #2, or DCI size set #1 and DCI size set #2 have at least one different element.

In the present application, the value of DCI size #1 is different from the value of DCI size #2 between any two DCI sizes (e.g., DCI size #1 and DCI size # 2).

Thus, the above M DCI formats may correspond to X original DCI sizes.

The value of X may be: the total number of DCI sizes having different values included in a set (referred to as set # a) composed of DCI sizes corresponding to each DCI format of the M DCI formats.

For example, if the value of each DCI size included in set # a is { a, a, b, c, d, d, e }, then the value of X is 5.

In embodiments of the invention, X is greater than Z.

Alternatively, however, X may be equal to or less than Z.

Where Z is the number of DCI size classes that terminal apparatus # a can detect within one time unit (e.g., slot).

That is, to limit the number of UE blind detections, as described above, the number of different DCI sizes that the UE detects is predefined within a given time slot.

By way of example, and not limitation, in the present application, the value of Z may include Z₁And Z₂Two values.

Alternatively, Z is₁The value of (b) may be the maximum number of categories of DCI size detected by the UE as specified by the communication system or communication protocol, in which case, for example, the Z₁May be 4.

Alternatively, Z is₂The value of (b) may be the maximum number of categories of DCI size detected by the UE as specified by the communication system or communication protocol to scramble a cell radio network temporary identifier (C-RNTI) on the CRC, in which case, for example, the Z-RNTI₂May be 3.

At S220, the network device # a and the terminal device # a may determine N detected DCI sizes based on the X original DCI sizes.

Optionally, the DCI size is a total number of bits obtained by adding a Cyclic Redundancy Check (CRC) bit number to an original bit number of the DCI format.

Optionally, the detecting DCI size is a total number of bits of all information fields (fields) of the DCI format after a bit number of padding (pad) or truncation (truncate) bits is added to a bit number of CRC (Cyclic redundancy Check).

Optionally, the detected DCI size is a total number of original bits of the DCI format.

Optionally, the detecting DCI size is a total number of bits of all information fields (fields) of the DCI format after padding (pad) or truncating (truncate) bits.

Optionally, the detecting DCI size is a bit sequence length of a CRC for generating the DCI format;

or, the network device # a and the terminal device # a may determine N detected DCI sizes for Y DCI formats of the M DCI formats.

Wherein N is a positive integer, N is less than or equal to Z, Y is a positive integer, and Y is less than or equal to M.

It should be noted that in the present application, "N is less than Z" may include the following meanings:

meaning 1: whether the N detection DCI sizes include a DCI size that scrambles a C-RNTI on a CRC or not, the value of N being smaller than Z₁。

Meaning 2: when the detected DCI size in N includes N 'DCI sizes scrambling C-RNTI on CRC, the value of N' is less than Z₂。

By way of example and not limitation, in the present application, the N detection DCI sizes may be determined in any one of the following manners.

Mode 1

The network device # a and the terminal device # a may determine the priority of each of the M DCI formats.

The priority of the DCI format may be system and defined, or may be configured according to higher layer signaling.

For example, in the present application, a mapping relationship # B may be pre-stored in the network device # a and the terminal device # a, and the mapping relationship # B may be used to indicate the priority of each of the multiple DCI formats (including the M formats).

In this application, the same priority may correspond to one or more DCI formats, or the priorities of different DCI formats may be the same.

Optionally, in this application, the same DCI format only corresponds to one priority, or one DCI format only has one priority.

For example, table 2 below shows an example of mapping # B (priority from high to low, and the latter case is similar).

TABLE 2

Priority level	DCI format
		First stage	DCI format0_0，DCI format1_0，DCI format2_2，DCI format2_3
Second stage	DCI format2_1
		Third stage	DCI format1_1
Fourth stage	DCI format0_1
		Fifth stage	DCI format2_0

For another example, table 3 below shows another example of the mapping relationship # B.

TABLE 3

Priority level	DCI format
		First stage	DCI format0_0，DCI format1_0
Second stage	DCI format2_2，DCI format2_3
		Third stage	DCI format2_1
Fourth stage	DCI format1_1
		Fifth stage	DCI format0_1
Sixth stage	DCI format2_0

Alternatively, in the present application, the same DCI format corresponds to only a plurality of (two or more) priorities.

In this case, the priority actually used by the DCI format may be determined based on a scene or parameter related to the transmission of the DCI corresponding to the DCI format (e.g., a search space in which the DCI is located, or a Bandwidth part (BWP), or an interfered RNTI).

For example, as an example and not a limitation, in the present application, the DCI format0_0 (or DCI format1_0) may correspond to two priorities, e.g., a first priority and a fifth priority.

In this case, the priority of the DCI format0_ 0/1_0 may be determined based on the BWP determining the DCI format0_ 0/1_0 size.

For example, if it is determined that the BWP of the DCI format0_ 0/1_0size is an Initial bandwidth region (Initial BWP), the priority of the DCI format0_0 may be a first level. The initial bandwidth region is a bandwidth region configured by the MIB (i.e. configured by broadcast signaling).

For another example, if it is determined that the BWP of the DCI format0_ 0/1_0size is a user-specific Active bandwidth area (Active BWP) (e.g., a bandwidth configured with user-specific signaling), the priority of the DCI format0_ 0/1_0 may be a fifth level.

Table 4 below shows still another example of mapping # B

TABLE 4

Table 5 below shows still another example of mapping # B

TABLE 5

Table 6 below shows still another example of mapping # B

TABLE 6

Table 7 below shows still another example of mapping # B

TABLE 7

Optionally, in the present application, each priority may correspond to one DCI size.

Or, in this application, the original DCI sizes of the DCI formats in the same priority may be the same, that is, the DCI size corresponding to one priority (referred to as priority #1) is the original DCI size corresponding to each DCI format of the priority # 1.

Without loss of generality, at least M DCI formats correspond to K priorities (i.e. K priorities corresponding to all DCI formats in the system), and at this time, the M DCI formats are divided into the K priorities.

Case 1, when K is less than or equal to Z

In this case, the network device # a and the terminal device # a may set K DCI sizes corresponding to the K priority levels as N detection DCI sizes. I.e., N equals K.

Case 2, when K is greater than Z

In this case, the network device # a and the terminal device # a may sort the K priorities in order of priority from top to bottom.

Without loss of generality, the priority after sequencing is sequentially set as: priority #1, priority #2, priority #3, … priority # i … priority # K, where i e [1, K ].

Then, the network device may use the DCI sizes corresponding to priority #1 to priority # N as N detection DCI sizes. That is, N is less than or equal to Z and N is less than K.

In the present application, the N types of detected DCI sizes may include at least 1 type of DCI size (i.e., an example of the first priority is referred to as DCI size # a), and the priority corresponding to the DCI size # a includes at least two DCI formats. The first priority represents only one priority of a plurality of priorities, and is not necessarily represented as the highest priority.

Optionally, the N detected DCI sizes may include at least 1 DCI size (referred to as DCI size # a), and the priority corresponding to the DCI size # a may include only one DCI format.

Based on the above processing, the M types of DCI formats may be divided into the following two types of DCI formats.

First-type DCI format: that is, the priority belongs to DCI format of priority #1 to priority # N.

A second type of DCI format: that is, the priority does not belong to the DCI format of the priority #1 to the priority # N, or the priority belongs to the DCI format of the priority # (N +1) to the priority # K.

In this application, the detection priority of the DCI format may be dynamically changed, for example, for table 4, if the system message is not updated, the UE may not need to detect the DCI format in the first level within a period of time, and the priority of the DCI format in the first level may be changed, where the priority of the UE detecting the DCI size within the period of time is shown in table 8:

TABLE 8

For ease of understanding and distinction, a DCI format (referred to as DCI format #1) of the first type DCI format and a DCI format (referred to as DCI format #2) of the second type DCI format are described as an example.

In S230, for the DCI of DCI format #1, the network device # a may normally transmit, and the terminal device # a may use the size obtained by adding the CRC bits to the original DCI size of DCI format #1 as the detected DCI size of DCI format #1, and detect the DCI according to the detected DCI size of DCI format #1 to obtain the DCI of DCI format # 1.

For DCI of DCI format #2, network device # a and terminal device # a may determine the detected DCI size of DCI format #2 from the N kinds of detected DCI sizes. Or, the network device # a and the terminal device # a may determine the detected DCI size of DCI format #2 from the detected DCI size of the first type DCI format. Alternatively, the network device # a and the terminal device # a may determine the detected DCI size of DCI format #2 from among the detected DCI sizes corresponding to priority #1 to priority # N.

For example, network device # A and terminal device # A may determine any one of the N detected DCI sizes (denoted as DCI size # α) as the detected DCI size of DCI format # 2.

Optionally, the original DCI size of the DCI size # α may be larger than the original DCI size of DCI format # 2.

Optionally, let P DCI sizes larger than the DCI format #2 be included in the N original DCI sizes, in this case, the DCI size # α may be the smallest DCI size among the P DCI sizes.

The network device # a may add H bits in the original DCI of the DCI format #2, where H may be a difference between a value of the original DCI size of the DCI format #2 and the original DCI size of the DCI size # α, thereby enabling the size of the DCI format #2 to be the same as the DCI size # α. For example, in table 4, DCI format #2 is a sixth priority DCI format, and DCI size # α is a second priority DCI format.

For example, the network device # a may add H0 bits to the head of the DCI format #2, or the network device # a may add H0 bits to the tail of the DCI format #2, which is not particularly limited in the present invention.

For example, the network device # a may add H0 bits in total at the head/tail of the bit sequence of some information fields of the DCI format #2, and the present invention is not particularly limited.

Thus, the terminal apparatus # a may use the detection bits of the DCI size # α as the detection DCI size of the DCI format #1, and detect the DCI according to the detection DCI size of the DCI format #1 to obtain the bits corresponding to the DCI of the DCI format # 2. And, the terminal device may delete H0 bits located at the head or tail of the obtained bits, thereby being able to obtain DCI of DCI format # 2.

It should be understood that the above-mentioned processing procedure of the DCI of DCI format #2 is only an exemplary illustration, and the present invention is not limited thereto, for example, the network device # a may not transmit the DCI of DCI format #2, and accordingly, the terminal device # a may not detect the DCI of DCI format # 2. Or network apparatus # a may transmit DCI of DCI format #2, but terminal apparatus # a may not detect DCI of DCI format # 2.

Optionally, the original DCI size of the DCI size # α may be smaller than the original DCI size of DCI format # 2.

The network device # a may truncate H bits in total in a bit sequence of some information fields of the original DCI of DCI format #2, where H may be a difference between a value of the original DCI size of DCI format #2 and an original DCI size of DCI size # α, thereby enabling the size of the DCI of DCI format #2 to be the same as DCI size # α. For example, in table 4, DCI format #2 is a fifth-priority DCI format, and DCI size # α is a first-priority DCI format.

Mode 2

Network device # a may group at least M DCI formats to determine N DCI format groups.

For example, the N DCI format groups may be N format groups corresponding to all DCI formats in the system.

Wherein each DCI format group comprises at least one DCI format of at least M DCI formats.

Also, the network device # a may transmit, to the terminal device # a, indication information # B that may be used to indicate DCI formats included in each of the N DCI format groups, respectively.

Thereby, the terminal apparatus # a can determine the N DCI format groups based on the indication information # B.

Thereafter, the network device # a and the terminal device # a may determine the original DCI size corresponding to each DCI format group.

For convenience of understanding and explanation, the following description will be made in detail on the procedure of determining the DCI size corresponding to a DCI format group, taking a DCI format group (referred to as DCI format group #1) as an example of any (i.e., any) of N DCI format groups.

Without loss of generality, DCI format group #1 includes L types of DCI formats.

The network device # a and the terminal device # a may use the original DCI size of one (e.g., any) DCI format (referred to as DCI format # L) in the L DCI formats as the original DCI size corresponding to the DCI format group #1, and obtain the detected DCI size of each DCI format in the group from the original DCI corresponding to the DCI format group # 1.

Optionally, the DCI format # L may be a DCI format with the largest original DCI size corresponding to the DCI format group # 1.

Furthermore, for any (i.e., any) DCI format (referred to as DCI format # M) among the M DCI formats, the network apparatus # a and the terminal apparatus # a may determine a DCI format group (referred to as DCI format group # M) to which the DCI format # M belongs, and determine a detected DCI size of the DCI format # M according to an original DCI size corresponding to the DCI format group # M.

In S230, the network device # a may transmit DCI of DCI format # M according to the detected DCI size of DCI format # M.

For example, if the original DCI size of DCI format # M is equal to the original DCI size corresponding to DCI format group # M, the DCI of DCI format # M is normally transmitted.

If the original DCI size corresponding to the DCI format group # M is larger than the original DCI size of the DCI format # M, the network device # a may add G bits to the DCI of the DCI format # M, where G may be a difference between the original DCI size of the DCI format # M and the original DCI size corresponding to the DCI format group # M, so that the size of the original DCI of the DCI format # M may be the same as the original DCI size corresponding to the DCI format group # M.

For example, the network device # a may add G0 bits to the head of the DCI format # M, or the network device # a may add G0 bits to the tail of the DCI format # M, which is not particularly limited in the present invention.

Thus, the terminal apparatus # a may detect the DCI format according to the detected DCI size of the DCI format # M (i.e., the original DCI size corresponding to the DCI format group # M) to obtain the bits corresponding to the DCI of the DCI format # M. And, the terminal device may delete H0 bits located at the head or tail of the obtained bits, thereby being able to obtain DCI of DCI format # M.

In mode 2, the value X may be smaller than Z, where the number N of DCI format groups is smaller than Z.

According to the communication method, when the number X of the types of the original DCI sizes corresponding to the M DCI formats is greater than the number Z of the types of DCI sizes that can be detected by the terminal device in a time unit, N types of detected DCI sizes are determined for Y types of DCI formats among the M types of DCI formats, and a downlink control channel is detected based on the N types of detected DCI sizes, where N is less than or equal to X.

Fig. 3 shows a procedure for transmitting DCI of M formats at most in a Control Resource Set (Control Resource Set) by a network device #1 (i.e., an example of a network device) and a terminal device #1 (i.e., an example of a terminal device).

In S310, the network device #1 may determine that M types of DCI formats that need to be transmitted to the terminal device #1 in time unit #1 (e.g., slot #1), that is, DCI carrying M types of DCI formats is needed on the control resource set corresponding to time unit # 1. Also, the network device #1 may transmit indication information #1 to the terminal device #1, and the indication information #1 may be used to indicate the M DCI formats. Thus, the terminal apparatus #1 can determine that DCI of the M DCI formats needs to be detected on the set of control resources in time unit #1 based on the indication information # 1.

Wherein M is a positive integer.

And, the network device #1 and the terminal device #1 may determine the original DCI size corresponding to each DCI format of the M DCI formats.

Specifically, in the present application, a mapping relation #1 may be pre-stored in the network device #1 and the terminal device #1, and the mapping relation #1 may be used to indicate a DCI size corresponding to each of the multiple DCI formats (including the M formats).

That is, the original DCI corresponding to a DCI format (e.g., DCI format #1) may refer to the DCI size corresponding to the DCI format #1 indicated by the mapping relation #1

Thus, the above M DCI formats may correspond to X original DCI sizes.

The value of X may be: the total number of DCI sizes having different values included in a set (referred to as set #1) composed of DCI sizes corresponding to each DCI format of the M DCI formats.

For example, if the value of each DCI size included in set #1 is { a, a, b, c, d, d, e }, then the value of X is 5.

Also, the network device #1 and the terminal device #1 may determine N detection DCI sizes based on the X kinds of original DCI sizes described above.

Optionally, the detecting DCI size is a bit sequence length of a CRC for generating the DCI format.

Specifically, network device #1 may group the M DCI formats to determine N DCI format groups.

Wherein each DCI format group comprises at least one DCI format in the M DCI formats.

Also, the network device #1 may transmit, to the terminal device #1, indication information #2, where the indication information #2 may be used to indicate DCI formats included in each of the N DCI format groups.

Thereby, the terminal apparatus #1 can determine the N DCI format groups based on the instruction information # 2.

At S320, the network device #1 and the terminal device #1 may determine an original DCI size corresponding to each DCI format group.

For convenience of understanding and explanation, the following description will be made in detail on the determination process of the original DCI size corresponding to a DCI format group, taking a DCI format group (referred to as DCI format group #1) of any (i.e., any) of N DCI format groups as an example.

The network device #1 and the terminal device #1 may use the original DCI size of one (e.g., any one) DCI format (referred to as DCI format # L) in the L DCI formats as the original DCI size corresponding to the DCI format group #1, and obtain the detected DCI size of each DCI format in the group from the original DCI corresponding to the DCI format group # 1.

Furthermore, for a certain (i.e., any) DCI format (referred to as "DCI format # M") among the M DCI formats, the network device #1 and the terminal device #1 may determine a DCI format group (referred to as "DCI format group # M") to which the DCI format # M belongs, and determine a detected DCI size of the DCI format # M according to an original DCI size corresponding to the DCI format group # M.

In S330, the network device #1 may transmit DCI of the DCI format # M according to the detected DCI size of the DCI format # M.

If the original DCI size of the DCI format group t # M is larger than the original DCI size corresponding to the DCI format group # M, the network device #1 may add G bits (e.g., 0 bit) to the DCI of the DCI format # M, where the G may be a difference value between the original DCI size of the DCI format # M and the original DCI size corresponding to the DCI format group # M, so that the size of the original DCI of the DCI format # M can be the same as the original DCI size corresponding to the DCI format group # M.

For example, the network device #1 may add G0 bits to the head of the DCI format # M, or the network device #1 may add G0 bits to the tail of the DCI format # M, which is not particularly limited in the present invention.

Thus, the terminal apparatus #1 may detect the DCI format according to the detected DCI size of the DCI format # M (i.e., the original DCI size corresponding to the DCI format group # M) to obtain the bits corresponding to the DCI of the DCI format # M. And, the terminal device may delete H0 bits located at the head or tail of the obtained bits, thereby being able to obtain DCI of DCI format # M.

The value of X can be smaller than Z, and the DCI format group number N is smaller than Z.

According to the foregoing method, fig. 4 is a schematic diagram of the communication apparatus 10 provided in the embodiment of the present application, and as shown in fig. 4, the communication apparatus 4 may be a terminal device (for example, the terminal device # a described above), or may be a chip or a circuit, such as a chip or a circuit that can be disposed on the terminal device. The terminal device may correspond to the terminal device in the method.

The communication device 10 may include a processor 11 (i.e., an example of a processing unit) and a memory 12. The memory 12 is configured to store instructions, and the processor 11 is configured to execute the instructions stored by the memory 12, so as to enable the apparatus 10 to implement the steps performed by the terminal device (for example, the terminal device # a described above) in the corresponding method in fig. 2.

Further, the communication device 10 may further include an input port 13 (i.e., one example of a communication unit) and an output port 14 (i.e., another example of a communication unit). Further, the processor 11, the memory 12, the input port 13 and the output port 14 may communicate with each other via internal connection paths, passing control and/or data signals. The memory 12 is used for storing a computer program.

The processor 11 may be configured to call and run the computation program from the memory 12 to control the input port 13 to receive signals and the output port 14 to send signals, thereby completing the steps of the terminal device in the above method. The memory 12 may be integrated in the processor 11 or may be provided separately from the processor 11.

Alternatively, if the communication device 10 is a terminal, the input port 13 is a receiver and the output port 14 is a transmitter. Wherein the receiver and the transmitter may be the same or different physical entities. When the same physical entity, may be collectively referred to as a transceiver.

Alternatively, if the communication device 10 is a chip or a circuit, the input port 13 is an input interface, and the output port 14 is an output interface.

As an implementation manner, the functions of the input port 13 and the output port 14 may be implemented by a transceiver circuit or a dedicated chip for transceiving. The processor 11 may be considered to be implemented by a dedicated processing chip, processing circuitry, a processor, or a general purpose chip.

As another implementation manner, a manner of using a general-purpose computer to implement the terminal device provided in the embodiment of the present application may be considered. Program codes that will implement the functions of the processor 11, the input port 13 and the output port 14 are stored in the memory 12, and a general-purpose processor implements the functions of the processor 11, the input port 13 and the output port 14 by executing the codes in the memory 12.

For example, in this embodiment of the present application, an ingress 13 is configured to receive first indication information sent by a network device, where the first indication information is used to indicate M types of downlink control information formats DCI formats, where the M types of DCI formats correspond to X types of original downlink control information sizes DCI sizes, M and X are positive integers, and X is greater than Z, where Z is a number of DCI size types that can be detected by the terminal device in one time unit; the processor 11 is configured to determine, for Y DCI formats of the M DCI formats, N detected downlink control information sizes DCI sizes, where N is a positive integer and is less than or equal to Z, and Y is a positive integer and is less than or equal to M, and detect a downlink control channel according to the N detected DCI sizes.

Optionally, the processor 11 is configured to determine the N detection DCI sizes from the M DCI formats according to a priority of each of the M DCI formats.

Optionally, the processor 11 is configured to determine, if at least two DCI formats of the Y DCI formats correspond to a first priority, that an original DCI size corresponding to the at least two DCI formats is a first DCI size corresponding to the first priority, where the first DCI size is one of the N detection DCI sizes, and DCI sizes corresponding to different priorities are different.

Optionally, the processor 11 is configured to determine that the detected DCI size corresponding to the second DCI format is the second DCI size if the priority corresponding to the second DCI format of the Y types of DCI formats is lower than the N priorities, where the second DCI size is a DCI size of the N types of detected DCI sizes.

Optionally, the ingress port 13 is configured to receive second indication information sent by the network device, where the second indication information is used to indicate N DCI format groups, each DCI format group includes at least one DCI format of the M DCI formats, and the N DCI format groups are in one-to-one correspondence with the N detected DCI sizes; the processor 11 is configured to determine, according to a DCI format group to which each DCI format of the M DCI formats belongs, a detected DCI size corresponding to each DCI format of the M DCI formats, where Y is equal to M.

The functions and actions of the modules or units in the communication apparatus 10 listed above are only exemplary descriptions, and the modules or units in the communication apparatus 10 may be used to execute the actions or processing procedures executed by the terminal device in the method 200 described above, and here, detailed descriptions thereof are omitted to avoid redundant description.

According to the communication device of the application, when the number X of the types of the original DCI sizes corresponding to the M DCI formats is greater than the number Z of the types of DCI sizes that can be detected by the terminal device in a time unit, N types of detected DCI sizes are determined again for Y types of DCI formats among the M types of DCI formats, and a downlink control channel is detected based on the N types of detected DCI sizes, where N is not greater than X.

For another example, in this embodiment of the application, the input port 13 is configured to receive first indication information and second indication information sent by the network device, where the first indication information is used to indicate M downlink control information formats DCI formats, where the M DCI formats correspond to X original downlink control information sizes DCI size, M and X are positive integers, the second indication information is used to indicate N DCI format groups, each DCI format group includes at least one DCI format of the M DCI formats, the N DCI format groups correspond to N detected DCI size one to one, N is a positive integer, and N is not greater than X; the processor 11 is configured to determine, according to a DCI format group to which each DCI format of the M DCI formats belongs, a detection DCI size corresponding to each DCI format of the M DCI formats, and detect a downlink control channel according to the N detection DCI sizes.

The functions and actions of the modules or units in the communication apparatus 10 listed above are only exemplary, and the modules or units in the communication apparatus 10 may be used to execute the actions or processing procedures executed by the terminal device in the method 300 described above, and here, detailed descriptions thereof are omitted to avoid redundant description.

According to the communication equipment, the N detection DCI sizes are determined for the M DCI formats, and the downlink control channel is detected based on the N detection DCI sizes, wherein N is not more than X, so that the DCI siz required to be detected can be reduced, the communication efficiency can be improved, and the equipment burden can be reduced.

For the concepts, explanations, details and other steps related to the technical solutions provided in the embodiments of the present application related to the apparatus 10, reference is made to the descriptions of the foregoing methods or other embodiments, which are not repeated herein.

Fig. 5 is a schematic structural diagram of a terminal device 20 provided in the present application. For convenience of explanation, fig. 5 shows only main components of the terminal device. As shown in fig. 5, the terminal device 20 includes a processor, a memory, a control circuit, an antenna, and an input-output means.

The processor is mainly configured to process a communication protocol and communication data, control the entire terminal device, execute a software program, and process data of the software program, for example, to support the terminal device to perform the actions described in the above embodiment of the method for indicating a transmission precoding matrix. The memory is mainly used for storing software programs and data, for example, the codebook described in the above embodiments. The control circuit is mainly used for converting baseband signals and radio frequency signals and processing the radio frequency signals. The control circuit and the antenna together, which may also be called a transceiver, are mainly used for transceiving radio frequency signals in the form of electromagnetic waves. Input and output devices, such as touch screens, display screens, keyboards, etc., are used primarily for receiving data input by a user and for outputting data to the user.

When the terminal device is turned on, the processor can read the software program in the storage unit, interpret and execute the instruction of the software program, and process the data of the software program. When data needs to be sent wirelessly, the processor outputs a baseband signal to the radio frequency circuit after performing baseband processing on the data to be sent, and the radio frequency circuit performs radio frequency processing on the baseband signal and sends the radio frequency signal outwards in the form of electromagnetic waves through the antenna. When data is sent to the terminal equipment, the radio frequency circuit receives radio frequency signals through the antenna, converts the radio frequency signals into baseband signals and outputs the baseband signals to the processor, and the processor converts the baseband signals into the data and processes the data.

Those skilled in the art will appreciate that fig. 5 shows only one memory and processor for ease of illustration. In an actual terminal device, there may be multiple processors and memories. The memory may also be referred to as a storage medium or a storage device, and the like, which is not limited in this application.

As an alternative implementation manner, the processor may include a baseband processor and a central processing unit, where the baseband processor is mainly used to process a communication protocol and communication data, and the central processing unit is mainly used to control the whole terminal device, execute a software program, and process data of the software program. The processor in fig. 5 integrates the functions of the baseband processor and the central processing unit, and those skilled in the art will understand that the baseband processor and the central processing unit may also be independent processors, and are interconnected through a bus or the like. Those skilled in the art will appreciate that the terminal device may include a plurality of baseband processors to accommodate different network formats, the terminal device may include a plurality of central processors to enhance its processing capability, and various components of the terminal device may be connected by various buses. The baseband processor can also be expressed as a baseband processing circuit or a baseband processing chip. The central processing unit can also be expressed as a central processing circuit or a central processing chip. The function of processing the communication protocol and the communication data may be built in the processor, or may be stored in the storage unit in the form of a software program, and the processor executes the software program to realize the baseband processing function.

For example, in the embodiment of the present application, the antenna and the control circuit having the transceiving function may be regarded as the transceiving unit 201 of the terminal device 20, and the processor having the processing function may be regarded as the processing unit 202 of the terminal device 20. As shown in fig. 5, the terminal device 20 includes a transceiving unit 201 and a processing unit 202. A transceiver unit may also be referred to as a transceiver, a transceiving device, etc. Optionally, a device for implementing the receiving function in the transceiver 201 may be regarded as a receiving unit, and a device for implementing the transmitting function in the transceiver 201 may be regarded as a transmitting unit, that is, the transceiver 201 includes a receiving unit and a transmitting unit. For example, the receiving unit may also be referred to as a receiver, a receiving circuit, etc., and the sending unit may be referred to as a transmitter, a transmitting circuit, etc.

Fig. 6 is a schematic diagram of an apparatus 30 for communication according to the foregoing method, and as shown in fig. 6, the apparatus 30 may be a network device (e.g., the network device # a or the network device #1), or may be a chip or a circuit, such as a chip or a circuit that can be disposed in the network device. Wherein the network device corresponds to the network device in the above method (e.g., the above network device # a or network device # 1).

The apparatus 30 may comprise a processor 31 (i.e. an example of a processing unit) and a memory 32. The memory 32 is used for storing instructions, and the processor 31 is used for executing the instructions stored by the memory 32 to make the apparatus 30 implement the steps executed by the network device (e.g., network device # a or network device #1) in the aforementioned method.

Further, the apparatus 30 may further include an input port 33 (i.e., one example of a communication unit) and an output port 33 (i.e., another example of a processing unit).

Still further, the processor 31, memory 32, input port 33 and output port 34 may communicate with each other via internal connection paths, passing control and/or data signals.

As another implementation manner, a manner of using a general-purpose computer to implement the network device provided in the embodiment of the present application may be considered. Program codes that implement the functions of the processor 31, the input port 33, and the output port 34 are stored in the memory, and the general-purpose processor implements the functions of the processor 31, the input port 33, and the output port 34 by executing the codes in the memory.

The memory 32 is used for storing a computer program.

For example, in this embodiment of the present application, the processor 31 may be configured to call and run the computing program from the memory 32 to determine N detected downlink control information sizes DCI sizes for Y DCI formats of M downlink control information formats DCI formats, where M DCI formats correspond to X original DCI sizes, M and X are positive integers, and X is greater than Z, Z is the number of DCI size types that a terminal device can detect in a time unit, N is a positive integer, and N is less than or equal to Z, and Y is a positive integer less than or equal to M; and is used to control the first indication information sent by the output port 34 to the terminal device, where the first indication information is used to indicate the M DCI formats; the processor 31 is further configured to send a downlink control channel according to the N detected DCI sizes.

Optionally, the processor 31 is specifically configured to determine the N detected DCI sizes from the M DCI formats according to the priority of each of the M DCI formats.

Optionally, the processor 31 is specifically configured to determine, if at least two DCI formats of the Y DCI formats correspond to a first priority, that an original DCI size corresponding to the at least two DCI formats is a first DCI size corresponding to the first priority, where the first DCI size is one of the N detection DCI sizes, and DCI sizes corresponding to different priorities are different.

Optionally, the processor 31 is specifically configured to determine that the detected DCI size corresponding to the second DCI format is the second DCI size if the priority corresponding to the second DCI format of the Y types of DCI formats is lower than the N priorities, where the second DCI size is a DCI size of the N types of detected DCI sizes.

Optionally, the processor 31 is specifically configured to determine N DCI format groups, where each DCI format group includes at least one DCI format of the M DCI formats, and the N DCI format groups are in one-to-one correspondence with the N detected DCI sizes; determining a detection DCI size corresponding to each DCI format of the M kinds of DCI formats according to the DCI format group to which each DCI format of the M kinds of DCI formats belongs, wherein Y is equal to M; and the output port 34 is further configured to send second indication information to the terminal device, where the second indication information is used to indicate the N DCI format groups.

The functions and actions of the modules or units in the communication apparatus 30 listed above are only exemplary descriptions, and the modules or units in the communication apparatus 30 may be used to execute the actions or processing procedures executed by the network device in the method 200, and here, detailed descriptions thereof are omitted to avoid redundant description.

According to the communication device of the application, when the number X of the types of the original DCI sizes corresponding to the M DCI formats is greater than the number Z of the types of DCI sizes that can be detected by the terminal device in one time unit, N types of detected DCI sizes are determined again for Y types of DCI formats among the M types of DCI formats, and a downlink control channel is detected based on the N types of detected DCI sizes, where N is not greater than X.

For another example, in this embodiment of the application, the processor 31 may be configured to call and run the computing program from the memory 32 to determine N DCI format groups, where each DCI format group includes at least one DCI format of M DCI formats, the N DCI format groups correspond to N detected DCI sizes one to one, the M DCI formats correspond to X original DCI sizes, X, M, and N are positive integers, and N is less than or equal to X, and determine the detected DCI size corresponding to each DCI format of the M DCI formats according to the DCI format group to which each DCI format of the M DCI formats belongs; the output port 34 is configured to send first indication information and second indication information to the terminal device, where the first indication information is used to indicate the M DCI formats, and the second indication information is used to indicate the N DCI format groups; and sending the downlink control channel according to the N detection DCI sizes.

The functions and actions of the modules or units in the communication apparatus 30 listed above are only exemplary, and the modules or units in the communication apparatus 30 may be used to execute the actions or processing procedures executed by the network device in the method 300, and here, detailed descriptions thereof are omitted to avoid redundant description.

For the concepts, explanations, details and other steps related to the technical solutions provided in the embodiments of the present application related to the apparatus 30, reference is made to the descriptions of the foregoing methods or other embodiments, which are not repeated herein.

Fig. 7 is a schematic structural diagram of a network device 40 according to an embodiment of the present application, which can be used to implement the functions of the network device (e.g., network device # a) in the foregoing method. The network device 40 includes one or more radio frequency units, such as a Remote Radio Unit (RRU) 401 and one or more baseband units (BBUs) (also referred to as digital units, DUs) 402. The RRU401 may be referred to as a transceiver unit, transceiver circuitry, or transceiver, etc., which may include at least one antenna 4011 and a radio frequency unit 4012. The RRU401 is mainly used for transceiving radio frequency signals and converting radio frequency signals and baseband signals, for example, for sending signaling messages described in the above embodiments to a terminal device. The BBU 402 is mainly used for performing baseband processing, controlling a base station, and the like. The RRU401 and the BBU 402 may be physically disposed together or may be physically disposed separately, that is, distributed base stations.

The BBU 402 is a control center of a base station, and may also be referred to as a processing unit, and is mainly used for performing baseband processing functions, such as channel coding, multiplexing, modulation, spreading, and the like. For example, the BBU (processing unit) 402 can be used to control the base station 40 to execute the operation flow related to the network device in the above-described method embodiment.

In an example, the BBU 402 may be formed by one or more boards, and the boards may support a radio access network of a single access system (e.g., an LTE system or a 5G system) together, or may support radio access networks of different access systems respectively. The BBU 402 also includes a memory 4021 and a processor 4022. The memory 4021 is used to store necessary instructions and data. For example, the memory 4021 stores the codebook and the like in the above-described embodiments. The processor 4022 is configured to control the base station to perform necessary actions, for example, to control the base station to execute the operation flow related to the network device in the above method embodiment. The memory 4021 and the processor 4022 may serve one or more boards. That is, the memory and processor may be provided separately on each board. Multiple boards may share the same memory and processor. In addition, each single board can be provided with necessary circuits.

In one possible implementation, with the development of System-on-chip (SoC) technology, all or part of the functions of the part 402 and the part 401 may be implemented by SoC technology, for example, by a base station function chip, which integrates a processor, a memory, an antenna interface, and other devices, and a program of the related functions of the base station is stored in the memory, and the processor executes the program to implement the related functions of the base station. Optionally, the base station function chip can also read a memory outside the chip to implement the relevant functions of the base station.

It should be understood that the structure of the network device illustrated in fig. 7 is only one possible form, and should not limit the embodiments of the present application in any way. This application does not exclude the possibility of other forms of base station structure that may appear in the future.

According to the method provided by the embodiment of the present application, an embodiment of the present application further provides a communication system, which includes the foregoing network device and one or more terminal devices.

It should be understood that in the embodiments of the present application, the processor may be a Central Processing Unit (CPU), and the processor may also be other general-purpose processors, Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, and the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

It will also be appreciated that the memory in the embodiments of the subject application can be either volatile memory or nonvolatile memory, or can include both volatile and nonvolatile memory. The non-volatile memory may be a read-only memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an electrically Erasable EPROM (EEPROM), or a flash memory. Volatile memory can be Random Access Memory (RAM), which acts as external cache memory. By way of example, but not limitation, many forms of Random Access Memory (RAM) are available, such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), Enhanced SDRAM (ESDRAM), synchlink DRAM (SLDRAM), and direct bus RAM (DR RAM).

The above embodiments may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, the above-described embodiments may be implemented in whole or in part in the form of a computer program product. The computer program product comprises one or more computer instructions or computer programs. The procedures or functions according to the embodiments of the present application are wholly or partially generated when the computer instructions or the computer program are loaded or executed on a computer. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored on a computer readable storage medium or transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by wire (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that contains one or more collections of available media. The usable medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium. The semiconductor medium may be a solid state disk.

It should be understood that the term "and/or" herein is merely one type of association relationship that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

It should be understood that, in the various embodiments of the present application, the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application. It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again. In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment. In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a U disk, a removable hard disk, a Read Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A method of communication, comprising:

receiving first indication information sent by network equipment, where the first indication information is used to indicate M types of downlink control information format DCI formats, where the M types of DCI formats correspond to X types of original downlink control information size DCI size, M and X are positive integers, and X is greater than Z, where Z is a number of DCI size types that can be detected by terminal equipment in a time unit;

determining N kinds of detection downlink control information size DCI sizes for Y kinds of DCI formats in the M kinds of DCI formats, wherein N is a positive integer and is less than or equal to Z, and Y is a positive integer less than or equal to M;

and detecting the downlink control channel according to the N detection DCI sizes.

2. The method according to claim 1, wherein the determining N detection DCI sizes for Y DCI formats of the M DCI formats includes:

and determining the N detection DCI sizes from the M DCI formats according to the priority of each DCI format in the M DCI formats.

3. The communication method according to claim 2, wherein the determining the N detection DCI sizes from the M DCI formats according to the priority of each of the M DCI formats includes:

if at least two of the Y DCI formats correspond to a first priority, determining that an original DCI size corresponding to the at least two DCI formats is a first DCI size corresponding to the first priority, wherein the first DCI size is one of the N detection DCI sizes, and the DCI sizes corresponding to different priorities are different.

4. The communication method according to claim 2 or 3, wherein the N detection DCI sizes correspond to N priorities respectively, and

for Y DCI formats of the M DCI formats, determining N detection DCI sizes includes:

if the priority corresponding to the second DCI format in the Y DCI formats is lower than the N priorities, determining that the detection DCI size corresponding to the second DCI format is the second DCI size, wherein the second DCI size is the DCI size in the N detection DCI sizes.

5. The communication method according to claim 4, wherein the second DCI size is larger than an original DCI size to which the second DCI format corresponds.

6. The communication method of claim 5, wherein the second DCI size is a smallest DCI size of the N detected DCI sizes that is larger than an original DCI size to which the second DCI format corresponds.

7. The communication method according to any one of claims 1 to 3, wherein DCIs carried by DCI formats corresponding to at most K DCI sizes of the N detected DCI sizes are scrambled using a cell radio network temporary identity (C-RNTI), and K is a positive integer less than or equal to N.

8. The method according to claim 1, wherein the determining N detection DCI sizes for Y DCI formats of the M DCI formats includes:

receiving second indication information sent by the network device, where the second indication information is used to indicate N DCI format groups, each DCI format group includes at least one DCI format of the M DCI formats, and the N DCI format groups are in one-to-one correspondence with the N detected DCI sizes;

and determining the detection DCI size corresponding to each DCI format of the M kinds of DCI formats according to the DCI format group to which each DCI format of the M kinds of DCI formats belongs, wherein Y is equal to M.

9. The communication method according to claim 8, wherein the detected DCI size corresponding to each DCI format group in the N DCI format groups is the original DCI size corresponding to a third DCI format in the each DCI format group.

10. The communication method according to claim 9, wherein the third DCI format is a DCI format with a largest size of the corresponding original DCI size in each DCI format group.

11. A method of communication, comprising:

determining N kinds of detected downlink control information size DCI sizes for Y kinds of DCI formats in M kinds of downlink control information format DCI formats, wherein the M kinds of DCI formats correspond to X kinds of original DCI sizes, M and X are positive integers, X is larger than Z, Z is the number of the DCI size types which can be detected by terminal equipment in a time unit, N is a positive integer, N is smaller than or equal to Z, and Y is a positive integer smaller than or equal to M;

first indication information sent to the terminal device, where the first indication information is used to indicate the M types of DCI formats;

and sending the downlink control channel according to the N detection DCI sizes.

12. The method according to claim 11, wherein the determining N detection DCI sizes for Y DCI formats of the M DCI formats includes:

13. The communication method according to claim 12, wherein the determining the N detection DCI sizes from the M DCI formats according to the priority of each of the M DCI formats includes:

14. The communication method according to claim 12 or 13, wherein said N detected DCI sizes correspond to N priorities, respectively, and

15. The communication method of claim 14, wherein the second DCI size is larger than an original DCI size to which the second DCI format corresponds.

16. The communications method of claim 15, wherein the second DCI size is a smallest of the N detected DCI sizes that is larger than an original DCI size to which the second DCI format corresponds.

17. The method of any one of claims 11 to 13, wherein the DCI carried by the DCI format for which at most K DCI sizes of the N detected DCI sizes correspond is scrambled using a cell radio network temporary identity, C-RNTI, K being a positive integer less than or equal to N.

18. The communication method according to claim 11, wherein the determining N types of DCI sizes for Y types of DCI formats among the M types of DCI formats includes:

determining N DCI format groups, wherein each DCI format group comprises at least one DCI format in the M DCI formats, and the N DCI format groups correspond to the N detection DCI sizes in a one-to-one mode;

determining a detection DCI size corresponding to each DCI format of the M kinds of DCI formats according to the DCI format group to which each DCI format of the M kinds of DCI formats belongs, wherein Y is equal to M; and

the communication method further comprises:

and sending second indication information to the terminal equipment, wherein the second indication information is used for indicating the N DCI format groups.

19. The method of claim 18, wherein the detected DCI size corresponding to each of the N DCI format groups is an original DCI size corresponding to a third DCI format in the each DCI format group.

20. The method according to claim 19, wherein the third DCI format is a DCI format with a largest size of the corresponding original DCI in each DCI format group.

21. A communication device, comprising:

a processor for executing a computer program stored in a memory to cause the communication device to perform the communication method of any one of claims 1 to 20.

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

23. A chip system, comprising: a processor for calling and running a computer program from a memory so that a communication device in which the chip system is installed performs the communication method according to any one of claims 1 to 20.