CN111586853A

CN111586853A - Wireless communication method and device

Info

Publication number: CN111586853A
Application number: CN201910118116.8A
Authority: CN
Inventors: 张旭; 陈铮; 薛丽霞
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2019-02-15
Filing date: 2019-02-15
Publication date: 2020-08-25
Also published as: WO2020164487A1

Abstract

The application provides a method and a device for wireless communication, wherein the method comprises the following steps: the terminal equipment determines a first search space set according to the number of currently used receiving antennas; the terminal device detects the downlink control channel according to the first search space set, so that the terminal device can select the search space set to perform PDCCH detection according to the number of currently used antennas, and can flexibly cope with different data flows.

Description

Wireless communication method and device

Technical Field

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

Background

In order to reduce the complexity of blind detection of the downlink control channel, the access device may configure one or more Search Space sets (Search Space sets) for the terminal device, where each Search Space Set includes Search spaces of one or more aggregation levels.

In the prior art, the search space set is configured semi-statically by the access device, however, the amount of traffic is dynamically changed, and the search space set configured semi-statically cannot adapt to the dynamic change of the data traffic, so that the communication delay may be increased, the reliability of communication may be reduced, and the user experience may be affected.

Disclosure of Invention

The application provides a wireless communication method and device, which can adapt to dynamic changes of quantity and flow, reduce communication delay, improve communication reliability and improve user experience.

In a first aspect, a method of wireless communication is provided, including: the terminal equipment determines a first search space set according to the number of currently used receiving antennas; and the terminal equipment detects a downlink control channel according to the first search space set.

According to the scheme provided by the application, the terminal equipment can select the search space set to perform PDCCH detection according to the number of the currently used antennas, and can flexibly deal with different data flows, for example, the detection period of the search space set corresponding to the larger number of antennas is small, so that the reliability of data transmission can be ensured, and the transmission delay is reduced; the detection period of the search space set corresponding to the smaller number of antennas is shorter, so that the power consumption of the terminal equipment can be reduced; for another example, the aggregation level of the search space set corresponding to the smaller number of antennas is larger, so that the detection performance of the PDCCH can be improved and adapted; the aggregation level of the search space set corresponding to the larger number of the antennas is smaller, so that the system resources are saved; for another example, the resource mapping mode of the search space set with a smaller number of antennas is a non-interleaving mapping mode, so that the access device can effectively utilize the scheduling gain; the resource mapping mode of the search space set with a large number of antennas is an interleaving mapping mode, so that the PDCCH with a low aggregation level can obtain diversity gain; therefore, the method is beneficial to improving the detection performance of the PDCCH, can adapt to the dynamic change of the quantity and the flow, reduces the communication time delay, improves the communication reliability and improves the user experience.

The first search space set may be one or more, and the present application is not particularly limited.

Optionally, the determining, by the terminal device, the first search space set according to the number of currently used receiving antennas includes: and the terminal equipment determines the first search space set from at least two search space sets according to the number of currently used receiving antennas.

Optionally, each of the at least two search space sets is associated with a terminal device receiving antenna number set, where the terminal device receiving antenna number set includes at least one terminal device receiving antenna number, and the first search space set includes, for the associated terminal device receiving antenna number set, a search space including the number of receiving antennas currently used by the terminal device.

Optionally, there is at least one different parameter between any two of the at least two sets of search spaces, where the parameter includes: the detection period of the search space set, the aggregation level of the candidate downlink control channels or the index of the control resource set CORESET associated with the search space set.

Optionally, the method further comprises: and the terminal equipment receives first configuration information, wherein the first configuration information is used for indicating a terminal equipment receiving antenna number set associated with each search space set in the at least two search space sets.

Optionally, the determining, by the terminal device, the first search space set according to the number of currently used receiving antennas includes: the terminal equipment determines parameters of the first search space set according to the number of currently used receiving antennas, wherein the parameters comprise at least one parameter of a detection period of the search space set, an aggregation level of candidate downlink control channels and an index of CORESET associated with the search space set.

Optionally, the parameters of the first search space set include at least two parameter sets, each parameter set is associated with one terminal device receiving antenna number set, where the terminal device receiving antenna number set includes at least one terminal device receiving antenna number, each parameter set includes a parameter value of at least one parameter of a detection period of the search space set, an aggregation level of a candidate downlink control channel, and an index of a CORESET associated with the search space set, and the parameter of the first search space is a parameter in the parameter set of which the associated terminal device receiving antenna number set includes the number of receiving antennas currently used by the terminal device.

Optionally, the method further comprises: and the terminal equipment receives second configuration information, wherein the second configuration information is used for indicating the number of receiving antennas associated with each parameter group in the at least two parameter groups.

Optionally, the at least two search space sets are dedicated search space sets of the terminal device.

Optionally, if the number of first receiving antennas corresponding to the first search space set is smaller than the number of second receiving antennas corresponding to the second search space set, the detection period of the first search space set is greater than the detection period of the second search space set.

Optionally, if the number of first receiving antennas corresponding to the first search space set is smaller than the number of second receiving antennas corresponding to the second search space set, the aggregation level of the first search space set is smaller than the aggregation level of the second search space set.

Optionally, if the number of first receiving antennas corresponding to the first search space set is smaller than the number of second receiving antennas corresponding to the second search space set, the resource mapping manner of the first search space set is non-interleaved mapping, and the resource mapping manner of the second search space set is interleaved mapping.

Optionally, when the number of first receiving antennas corresponding to a first search space set is less than or equal to a preset first threshold, a detection period of the first search space set is greater than or equal to a preset second threshold, and when the number of first receiving antennas is greater than or equal to a preset third threshold, the detection period of the first search space set is less than or equal to a preset fourth threshold, where the first threshold is less than the third threshold, and the fourth threshold is less than the second threshold.

Optionally, when the number of first receiving antennas corresponding to the first search space set is less than or equal to a preset fifth threshold, the aggregation level of the first search space set is greater than or equal to a preset sixth threshold, and when the number of first receiving antennas is greater than or equal to a preset seventh threshold, the aggregation level of the first search space set is less than or equal to a preset eighth threshold, where the fifth threshold is less than the seventh threshold, and the eighth threshold is less than the sixth threshold.

Optionally, the fifth threshold comprises 2, the sixth threshold comprises 4, the seventh threshold comprises 4, and the eighth threshold comprises 2.

Optionally, when the number of first receiving antennas corresponding to the first search space set is less than or equal to a preset ninth threshold, the resource mapping manner of the first search space set is non-interleaved mapping, and when the number of first receiving antennas is greater than or equal to a preset tenth threshold, the resource mapping manner of the first search space set is interleaved mapping, where the ninth threshold is less than the tenth threshold.

Optionally, the ninth threshold comprises 2 and the tenth threshold comprises 4.

In a second aspect, an access device determines a first search space set according to the number of receiving antennas currently used by a terminal device; and the access equipment sends a downlink control channel according to the first search space set.

Optionally, the determining, by the access device, the first search space set according to the number of currently used receiving antennas of the terminal device includes: the access equipment determines a first search space set from at least two search space sets according to the number of currently used receiving antennas.

Optionally, the method further comprises: the access device sends first configuration information, where the first configuration information is used to indicate the number of receiving antennas associated with each of the at least two search space sets.

Optionally, the determining, by the access device, the first search space set according to the number of currently used receiving antennas of the terminal device includes: and the access equipment determines parameters of the first search space set according to the number of the receiving antennas currently used by the terminal equipment, wherein the parameters comprise at least one parameter of a detection period of the search space set, an aggregation level of the candidate downlink control channels and an index of a CORESET associated with the search space set.

Optionally, the method further comprises: the access device sends second configuration information, where the second configuration information is used to indicate the number of receiving antennas associated with each parameter group in the at least two parameter groups.

In a third aspect, a method of wireless communication is provided, including: the terminal equipment determines a first search space set according to a timer of a discontinuous communication DRX which is currently operated; and the terminal equipment detects a downlink control channel according to the first search space set.

According to the scheme provided by the application, the terminal equipment can select the search space set to perform PDCCH detection according to the currently running DRX timer, and can flexibly cope with different data flows, for example, the detection period of the search space set corresponding to the DRX-inactivity timer is small, so that the reliability of data transmission can be ensured, the transmission delay is reduced, the detection period of the search space set corresponding to the DRX-onDurationTimer is small, and the power consumption of the terminal equipment can be reduced; therefore, the method is beneficial to improving the detection performance of the PDCCH, can adapt to the dynamic change of the quantity and the flow, reduces the communication time delay, improves the communication reliability and improves the user experience.

Optionally, the determining, by the terminal device, the first search space set according to a timer of a currently running DRX includes: the terminal equipment determines a first search space set from at least two search spaces according to a timer of the currently running DRX, wherein at least one different parameter exists between any two search space sets of the at least two search space sets, and the parameter comprises a detection period of the search space sets.

Optionally, the method further comprises: the terminal equipment receives first configuration information, wherein the first configuration information is used for indicating a mapping relation between timers of at least two DRX types and at least two search space sets; and the terminal equipment determines the search space set corresponding to the timer of the currently running DRX and indicated by the first configuration information as a first search space set.

Optionally, the determining, by the terminal device, the first search space set according to the timer of the currently running DRX includes: and the terminal equipment determines parameters of the first search space set according to a timer of the currently running DRX, wherein the parameters comprise at least one parameter of a detection period, an aggregation level or a resource mapping mode.

Optionally, the method further comprises: the terminal equipment receives second configuration information, wherein the second configuration information is used for indicating a timer of DRX corresponding to each parameter group in a plurality of parameter groups, and each parameter group comprises a value of a detection period of a search space set; and the terminal equipment determines the parameters in the parameter group corresponding to the timer of the currently running DRX, which is indicated by the second configuration information, as the parameters of the first search space set.

Optionally, a detection period of the first search space set is greater than a detection period of the second search space set. The timer of the DRX corresponding to the first search space set is DRX-onDurationTimer, and the timer of the DRX corresponding to the second search space set is DRX-inactivtytimer.

Optionally, when the drx-onDurationTimer corresponds to the first search space set, a detection period of the first search space set is greater than or equal to a preset first threshold.

Optionally, when the first search space set corresponds to a drx-inactivytytimer, a detection period of the first search space set is less than or equal to a preset second threshold.

The first threshold comprises 10 solts and the second threshold comprises 5 slots.

In a fourth aspect, an access device determines a first search space set according to a timer for Discontinuous Reception (DRX) currently running by a terminal device; and the access equipment sends a downlink control channel according to the first search space set.

Optionally, the determining, by the access device, the first search space set according to a timer of DRX currently operated by the terminal device includes: the access equipment determines the mapping relation between the timers of at least two DRX types and at least two search space sets, wherein at least one different parameter exists between any two search space sets in the at least two search space sets, and the parameter comprises the detection period of the search space sets; and the access equipment determines a search space set corresponding to the timer of the DRX currently operated by the terminal equipment as a first search space set.

Optionally, the method further comprises: and the access equipment sends first configuration information to the terminal equipment, wherein the first configuration information is used for indicating the mapping relation between the timers of the at least two DRX types and the at least two search space sets.

Optionally, the determining, by the access device, the first search space set according to the timer of the DRX currently operated by the terminal device includes: the access equipment determines a timer of DRX corresponding to each parameter group in a plurality of parameter groups, wherein each parameter group comprises a value of a detection period of a search space set; and the access equipment determines parameters in a parameter group corresponding to a timer of DRX (discontinuous reception) currently operated by the terminal equipment as parameters of the first search space set.

Optionally, the method further comprises: and the access equipment sends second configuration information to the terminal equipment, wherein the second configuration information is used for indicating a timer of DRX corresponding to each parameter group in the plurality of parameter groups.

In a fifth aspect, an apparatus for wireless communication is provided, comprising: the processing unit and the storage unit.

Wherein, each unit in the apparatus is configured to execute each step of the communication method in each implementation manner of the first aspect and the first aspect.

In one design, the 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 apparatus is a communication device that may include a transmitter to transmit information or data and a receiver to receive information or data.

In a sixth aspect, an apparatus for wireless communication is provided, comprising: the processing unit and the storage unit.

Wherein, each unit in the apparatus is configured to execute each step of the communication method in each implementation manner of the second aspect and the second aspect.

In a seventh aspect, an apparatus for wireless communication is provided, including: processor, memory, control circuit, antenna and input-output device.

Wherein, each unit in the apparatus is configured to execute each step of the communication method in each implementation manner of the third aspect and the third aspect.

In an eighth aspect, an apparatus for wireless communication is provided, comprising: processor, memory, control circuit, antenna and input-output device.

Wherein, each unit in the apparatus is configured to execute each step of the communication method in each implementation manner of the fourth aspect and the fourth aspect.

In a ninth aspect, an apparatus for wireless communication is provided, comprising: a radio frequency unit and a baseband unit.

Wherein, each unit in the apparatus is configured to perform each step of the communication method in each implementation manner of any one of the first aspect to the fourth aspect.

In a tenth aspect, there is provided a communication apparatus comprising: a processor, a memory for storing a computer program, the processor being configured to invoke and run the computer program from the memory such that the communication device performs the communication method of any one of the first to fourth aspects and its various possible implementations.

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 forwarding device further comprises a transmitter (transmitter) and a receiver (receiver).

In an eleventh aspect, a communication system is provided, which includes the communication device provided in the ninth aspect.

In a possible design, the communication system may further include other devices that interact with the communication device in the solution provided in the embodiment of the present application.

In a twelfth aspect, there is provided a 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 method of any one of the possible implementations of the first to fourth aspects described above.

In a thirteenth 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 method of any one of the possible implementations of the first to fourth aspects.

In a fourteenth aspect, a chip system is provided, which includes a memory for storing a computer program and a processor for calling and executing the computer program from the memory, so that a communication device in which the chip system is installed executes the method in any one of the possible implementation manners of the first aspect to the fourth aspect.

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 diagram illustrating an example of a resource division method.

FIG. 3 is a schematic diagram of an example of the structure of REG.

Fig. 4 is a diagram illustrating an example of possible locations of PDCCH candidates in different aggregation levels.

Fig. 5 is a diagram illustrating an example of a correspondence relationship between PDCCHs and CCEs.

Fig. 6 is a diagram illustrating an example of the position of PDCCH candidates.

Fig. 7 is a diagram illustrating an example of a DRX cycle.

Fig. 8 is a diagram illustrating another example of a DRX cycle.

Fig. 9 is a schematic flowchart of an example of a PDCCH detection procedure according to the present application.

Fig. 10 is a schematic diagram showing an example of the correspondence relationship between the number of antennas and the detection period.

Fig. 11 is a schematic flowchart of another example of a PDCCH detection procedure according to the present application.

Fig. 12 is a schematic flowchart of another example of a PDCCH detection procedure according to the present application.

Fig. 13 is a schematic diagram showing an example of the correspondence relationship between the timer and the detection period.

Fig. 14 is a schematic flowchart of another example of a PDCCH detection procedure according to the present application.

Fig. 15 is a schematic block diagram of an example of a wireless communication apparatus according to the present application.

Fig. 16 is a schematic block diagram of another example of the wireless communication apparatus according to the present application.

Fig. 17 is a schematic configuration diagram of an example of a terminal device according to the present application.

Fig. 18 is a schematic configuration diagram of an example of an access device according to 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, a LTE Frequency Division Duplex (FDD) system, a 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) or New Radio (NR) system, and the like.

By way of example, and not limitation, in embodiments of the present application, a terminal device in embodiments of the present application may refer to a user device, 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 also be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with wireless communication function, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device, a terminal device in a future 5G network or a terminal device in a future evolved Public Land Mobile Network (PLMN), and the like, which are not limited in this embodiment of the present application.

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, where IoT is an important component of future information technology development, and a main technical feature of the present application is to connect an article 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, for example, a Narrowband (NB) technology. 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.

In addition, in this application, the terminal device may further include sensors such as an intelligent printer, a train detector, and a gas station, and the main functions include collecting data (part of the terminal device), receiving control information and downlink data of the network device, and sending electromagnetic waves to transmit uplink data to the network device.

The network device in the embodiment of the present application may be a device for communicating with a terminal device, the network device may be a Base Transceiver Station (BTS) in a global system for mobile communications (GSM) system or a Code Division Multiple Access (CDMA) system, may also be a base station (NodeB) in a Wideband Code Division Multiple Access (WCDMA) system, may also be an evolved NodeB (eNB) or eNodeB) in an LTE system, may also be a wireless controller in a Cloud Radio Access Network (CRAN) scenario, or the network device may be a relay station, an access point, a vehicle-mounted device, a wearable device, a network device in a future 5G network, or a network device in a future evolved PLMN network, may be a WLAN Access Point (AP) in a wireless access network (cra), may be a new wireless system, NR) system the present embodiments are not limited.

In addition, in this embodiment of the present application, an access network device provides a service for a cell, and a 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), and the small cell here may include: urban cell (metro cell), micro cell (microcell), pico cell (pico cell), femto cell (femto cell), etc., and these small cells have the characteristics of small coverage and low transmission power, and are suitable for providing high-rate data transmission service.

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 identification (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.

In addition, in the present application, the network device may include a base station (gNB), such as a macro station, a micro base station, an indoor hotspot, a relay node, and the like, and functions to transmit radio waves to the terminal device, on one hand, to implement downlink data transmission, and on the other hand, to transmit scheduling information to control uplink transmission, and to receive radio waves transmitted by the terminal device and receive uplink data transmission.

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.

In addition, various aspects or features of the present 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 can include but are not limited to magnetic storage devices (e.g., hard disk, floppy disk, magnetic strips, etc.), 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 may utilize a different frequency band than reverse link 120, and forward link 124 may 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 utilize a common frequency band and forward link 124 and reverse link 126 may utilize 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.

Moreover, the communication system 100 may be a PLMN network, a device-to-device (D2D) network, a machine-to-machine (M2M) network, an IoT network, or other networks, and fig. 1 is a simplified schematic diagram for example only, 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 present application, the basic unit on the frequency domain may be one Subcarrier, and in the present application, the Subcarrier Spacing (SCS) may be 15KHz, 30KHz, or the like.

In the present application, a unit of a frequency domain Resource used for uplink transmission or downlink transmission may be a Physical Resource Block (PRB), and each PRB is composed of 12 consecutive subcarriers in a frequency domain.

Fig. 2 shows an example of a time-frequency Resource dividing manner according to the present application, and as shown in fig. 2, each Element on a Resource grid is referred to as a Resource Element (RE). Wherein, RE is the smallest physical resource, and includes one subcarrier in one Orthogonal Frequency Division Multiplexing (OFDM) OFDM symbol.

In this application, a basic time unit of resource scheduling (e.g., downlink resource scheduling) may be one slot (slot), for example, one slot consists of 14 OFDM symbols in time.

The access device may transmit a Physical Downlink Shared Channel (PDSCH) and a Physical Downlink Control Channel (PDCCH) to the terminal device.

In order to correctly receive the PDSCH, the terminal device needs to demodulate a downlink control channel first, and Downlink Control Information (DCI) carried by the PDCCH includes relevant information required for receiving the PDSCH, for example, the position and size of time-frequency resources of the PDSCH, multi-antenna configuration information, and the like.

The PDCCH is transmitted in a control-resource set (core set), and the core set includes multiple PRBs in a frequency domain and one or more (e.g., 2 or 3) OFDM symbols in a time domain, where the OFDM symbol corresponding to the PDCCH may be located at any position within a slot.

In the present application, a Control-channel element (CCE) is a basic unit constituting a PDCCH, and each CCE in the CORESET has a corresponding index number.

In this application, one PDCCH may be composed of one or more (e.g., 2, 4, 8 or 16) CCEs, for example, the number of CCEs included in one PDCCH may be determined by a DCI payload size (DCI) of the PDCCH and/or a coding rate required by the PDCCH, and the number of CCEs constituting the PDCCH is also referred to as an Aggregation Level (AL).

The access device can adjust the aggregation level of the PDCCH according to the actual transmission wireless channel state, thereby realizing link self-adaptive transmission.

And, one CCE corresponds to 6 resource-element groups (REGs) on a physical resource. As shown in fig. 3, one REG occupies one OFDM symbol in the time domain and one resource block in the frequency domain (i.e., includes 12 subcarriers consecutive in the frequency domain).

The mapping relationship between CCEs and REGs may include Interleaved mapping (Interleaved mapping) and Non-Interleaved mapping (Non-Interleaved mapping), and the mapping relationship used in the actual transmission process may be configured through high-layer signaling. By interleaving mapping, REGs after CCE mapping can be dispersed throughout CORESET, and further frequency diversity gain can be obtained. Under the non-interleaved mapping, the REGs mapped by the CCEs can be gathered in partial time-frequency resources in the CORESET.

The search space (search space) is a set of candidate (candidate) PDCCHs at a certain Aggregation Level (AL). Because the aggregation level of the PDCCH actually sent by the access device is variable with time, and because no relevant signaling informs the UE of the aggregation level, the UE needs to perform blind detection on the PDCCH in different aggregation levels, where the PDCCH to be blind detected is called a candidate PDCCH, and a certain aggregation level may have multiple candidate PDCCHs. The UE decodes all PDCCH candidates comprising CCEs in the search space, for example, Cyclic Redundancy Check (CRC) decoding, and if the CRC Check passes, the terminal device may consider the content of the decoded PDCCH to be valid for the terminal device, and process the decoded relevant information. For example, fig. 4 shows an example of possible locations of PDCCH candidates under different aggregation levels.

In order to reduce the blind detection complexity of the downlink control channel, the access device may configure one or more search space sets (search space sets) for the terminal device, where each search space set includes search spaces of one or more aggregation levels.

The search space set can be divided into two types, a common search space set (common search space set) and a user-specific search space set (UE-specific search space set). The PDCCH of the common search space set is mainly used for indicating to receive system messages, random access responses, paging messages and the like. The PDCCH of the user-specific search space set is used for scheduling uplink data or downlink data for the terminal device.

The access device may send configuration information of the search space sets to the terminal device, where the configuration information may include an index number of each search space set configured for the terminal device by the access device and an index number of a CORESET associated with each search space set. For example, if one CORESET includes 24 CCEs, the corresponding aggregation level AL in the search space set is 2, and the number of PDCCH candidates is 6, fig. 5 shows an example of CCEs corresponding to PDCCH candidates.

In the time domain, the terminal device detects candidate PDCCHs in the search space set at certain time intervals, and therefore the configuration information may further include information of at least one of the following parameters:

parameter 1, detection period

That is, the terminal device detects the time interval of the search space set, and the unit of the detection period may be slot.

Parameter 2, slot offset

That is, the time offset between the starting time of the detection period and the time when the terminal device first detects the search space set is smaller than the value of the detection period.

Parameter 3, number of time slots

That is, the terminal device continuously detects the number of time slots of the search space set in one detection, where the value of the number of time slots is smaller than the value of the detection period.

Parameter 4, symbol position

That is, within each slot, the location of the CORESET starting symbol associated with the set of search spaces is searched.

For example, assuming that the detection period is 10 slots, the slot offset is 3 slots, the number of slots is 2 slots, the CORESET associated with the search space set is a CORESET that occupies 2 OFDM symbols, and the symbol positions are OFDM symbol 0 and OFDM symbol 7 in the slots, then fig. 6 shows the positions of the candidate PDCCHs, that is, as shown in fig. 6, the terminal device may detect the candidate PDCCHs of the search space set in the CORESET on the symbols with

indexes

0 and 7 in the slots with

indexes

3 and 4 in each detection period, and the CORESET occupies 2 OFDM symbols in the time domain.

Optionally, in addition to the above information, the configuration information may also include, but is not limited to, information of one or more of the following parameters:

parameter 5, aggregation level size

That is, the access device configures information of an aggregation level included in each search space set for the terminal device, for example, a value range of the aggregation level may be: {1,2,4,8, 16}.

Parameter 6, number of candidate control channels

Specifically, the number of PDCCH candidates in the search space of each aggregation level.

In this application, the terminal device may be in different states, where one of the states is a Radio Resource Control (RRC) connection state, which is referred to as an RRC _ CONNECTED state for short. In the RRC _ CONNECTED state, the terminal device has already established an RRC context (context), i.e. the parameters necessary for communication between the terminal device and the radio access network are known to both.

In general, packet-based data streams are typically bursty, i.e., there may be a period of data transmission that occurs during a period of time, but no data transmission for a subsequent period of time. Therefore, in the present application, a Discontinuous Reception (DRX) mechanism may be used, that is, when there is no data transmission, the terminal device may stop detecting the PDCCH and stop receiving the corresponding data transmission to reduce power consumption, thereby increasing the battery life.

As shown in fig. 7, in DRX, the access device may configure a DRX cycle (cycle) for the terminal device in RRC _ CONNECTED state, where the DRX cycle includes a time region called "wake up (On duration)" or "active".

During the "on duration" time, the UE may detect the PDCCH. That is, the terminal device may start a timer at a time start position of each DRXcycle (i.e., a time start position of the "On duration"), where the time length of the timer is the time length of the "On duration", and the timer may be referred to as a duration timer (drx-onDurationTimer), for example, the drx-onDurationTimer may range from 1 to 1200 milliseconds (ms).

Thus, the terminal device can detect the PDCCH within the time range in which the drx-onDurationTimer is running.

If the terminal device does not detect the PDCCH within the time range in which the DRX-onDurationTimer is running, the terminal device may enter a sleep state after the DRX-onDurationTimer expires, that is, the terminal device may turn off the receiving circuit during the remaining time period of the DRX cycle, thereby reducing the power consumption of the terminal.

As shown in fig. 8, if the terminal device detects the PDCCH within the time range in which the DRX on duration timer is running, the terminal device may turn on an inactivity timer (DRX-inactivity timer) in the DRX mechanism. If the terminal continues to detect the PDCCH during the run time of the drx-InactivtyTimer, the terminal may reset (restart) the drx-InactivtyTimer and restart timing. And, if the drx-inactivity timer is in an operating state, the terminal device continues to detect the PDCCH until the drx-inactivity timer times out even if the drx-onduration timer expires (or times out), i.e., the "on duration" time ends.

Fig. 9 is a schematic diagram illustrating an example of a method 200 for detecting a downlink control channel according to the present application, and as shown in fig. 9, an access device # a may configure a plurality of search space sets for a terminal device # a.

By way of example and not limitation, the set of search spaces may be a user-specific set of search spaces for terminal device # a.

In the present application, at least one different search space set parameter exists between any two of the plurality of search space sets.

Also, in the present application, the search space set parameter may include, but is not limited to, at least one of the following:

A. detection period of search space set

B. Aggregation level of candidate downlink control channels

That is, the aggregation level of the search space in the search space set, or the number of CCEs included in the PDCCH in the search space set, is taken as a value.

For example, an aggregation level may range from {1, 2, 4, 8 }.

For another example, another aggregation level may have a value in the range of {1, 2 }.

For another example, another aggregation level may have a value in the range of {4, 8 }.

C. Index of CORESET associated with search space set

The terminal device may obtain, through the index of the CORESET associated with the search space set, a mapping manner between CCEs and REGs of the candidate control channels of the search space set, which may include, for example, interleaved mapping and non-interleaved mapping.

In this application, different search space sets may correspond to different sets of terminal device receiving antenna numbers, where each set of terminal device receiving antenna data includes at least one terminal device receiving antenna number (specifically, a value of the terminal device receiving antenna number), or the at least two search space sets and the at least two sets of terminal device receiving antenna numbers have a one-to-one correspondence relationship.

For example, assuming that the search space set # a corresponds to the terminal device receiving antenna data set # a, at least one parameter of the search space set # a is determined according to the terminal device receiving antenna data set # a, and as an example and not by way of limitation, at least one of the following determination manners may be cited.

Mode 1

When the value (e.g., the maximum value) of the number of antennas in the terminal device reception antenna data set # a is less than or equal to the preset threshold # a, the detection period of the search space set # a may be configured to be greater than or equal to the preset threshold # B.

When the value (e.g., the minimum value) of the number of antennas in the terminal device reception antenna data set # a is greater than or equal to the preset threshold # C, the detection period of the search space set # a may be configured to be less than or equal to the preset threshold # D.

Wherein the threshold # a may be less than or equal to the threshold # C.

The threshold # B may be greater than or equal to the threshold # D.

For example, the threshold # a may have a value of 2, and the threshold # C may have a value of 4.

For another example, the threshold # B may be 10 slots or 16 slots, and the threshold # D may be 2 slots, 4 slots, or 5 slots.

When the number of antennas used by the terminal device is small (for example, 2), it means that the data amount of the downlink data is small, and in this case, by setting the detection period of the search space set # a to a large value, the power consumption of the terminal device can be reduced.

Accordingly, when the number of antennas used by the terminal device is large (for example, 4), it means that when the data amount of the downlink data is large, in this case, by setting the detection period of the search space set # a to a small value, it is possible to reduce the delay of data transmission and improve the reliability of communication.

Mode 2

When the value (e.g., the maximum value) of the number of antennas in the terminal device reception antenna data set # a is less than or equal to the preset threshold # E, the aggregation level of the search space set # a may be configured to be greater than or equal to the preset threshold # F.

When the value (e.g., the minimum value) of the number of antennas in the terminal device reception antenna data set # a is greater than or equal to the preset threshold # G, the aggregation level of the search space set # a may be configured to be less than or equal to the preset threshold # H.

Wherein the threshold # E may be less than or equal to the threshold # G.

The threshold # F may be greater than or equal to the threshold # H.

For example, the threshold # E may have a value of 2, and the threshold # G may have a value of 4.

In this case, the threshold # F may take a value of 4, and the threshold # H may take a value of 2

When the number of antennas used by the terminal device is small (e.g., 2), the performance of the terminal device for detecting the PDCCH may be affected, and in this case, increasing the aggregation level is beneficial to improving the detection performance of the PDCCH.

When the number of antennas used by the terminal device is large (e.g., 4), the performance of the terminal device for detecting the PDCCH is enhanced, and in this case, reducing the aggregation level is beneficial to saving system resources.

Mode 3

When the value (e.g., the maximum value) of the number of antennas in the antenna data set # a received by the terminal device is less than or equal to the preset threshold # I, the index of the CORESET associated with the search space set # a may be determined as the index # a, where the CCE mapping manner of the CORESET of the index # a is non-interleaving mapping, and thus the resource mapping manner of the CCEs of the candidate control channels of the search space set is non-interleaving mapping.

When the value (e.g., the minimum value) of the number of antennas in the antenna data set # a received by the terminal device is greater than or equal to the preset threshold # J, the index of the CORESET associated with the search space set # a may be determined as the index # B, where the CCE mapping manner of the CORESET of the index # B is interleaving mapping, and thus the resource mapping manner of the CCEs of the candidate control channels of the search space set is interleaving mapping.

Wherein, the threshold # I may be less than or equal to the threshold # J.

For example, the threshold # I may have a value of 2, and the threshold # J may have a value of 4.

When the number of antennas used by the terminal device is small (for example, 2), the access device can effectively utilize the scheduling gain by using the non-interleaving mapping mode.

When the number of antennas used by the terminal device is large (e.g., 4), the PDCCH of a lower aggregation level (e.g., 2) can obtain a diversity gain by interleaving mapping.

For another example, if the search space set #1 corresponds to the terminal device reception antenna data set #1 and the search space set #2 corresponds to the terminal device reception antenna data set #2, then if the terminal device reception antenna data set #1 is smaller than the terminal device reception antenna data set #2, at least one of the following relationships between the search space set #1 and the search space set #2 may be satisfied.

Relation 1

As shown in fig. 10, the detection period of the search space set #1 is greater than the detection period of the search space set # 2.

Alternatively, the detection time interval of the search space set #1 is greater than the detection time interval of the search space set # 2.

When the number of antennas used by the terminal device is large (for example, 4), it indicates that the data amount of downlink data is large, and accordingly, when the number of antennas used by the terminal device is small (for example, 2), it indicates that the data amount of downlink data is small, that is, when the value (for example, the maximum value) of the number of antennas in the terminal device reception antenna data set #1 is smaller than the value (for example, the minimum value) of the number of antennas in the terminal device reception antenna data set #2, it indicates that the data amount of downlink transmission corresponding to the search space set #1 is smaller than the data amount of downlink transmission corresponding to the search space set # 1.

From this, it is understood that the amount of traffic of the terminal device is small when the search space set #1 is used, and in this case, by setting the detection period of the search space set #1 to a large value, the power consumption of the terminal device can be reduced.

In contrast, when the search space set #2 is used, the traffic of the number of terminal devices is large, and in this case, the detection period of the search space set #2 is set to a small value, so that the delay of data transmission can be reduced and the reliability of communication can be improved.

For example, when the value (e.g., the maximum value) of the number of antennas in the terminal device reception antenna data set #1 is 2, the detection period of the search space set #1 may be 10 slots or 16 slots.

For another example, when the value (e.g., the minimum value) of the number of antennas in the terminal device receiving antenna data set #2 is 4, the detection period of the search space set #2 may be 2 slots, 4 slots, or 5 slots.

Relation 2

The value range of the aggregation level of the search space set #1 is smaller than the value range of the aggregation level of the search space set # 2.

For example, when the value (e.g., the maximum value) of the number of antennas in the terminal device receiving antenna data set #1 is 2, the aggregation level of the search space set #1 may take a value range of {4, 8}, or the aggregation level of the search space set #1 takes a value of 4 or 8.

When the value (e.g., the minimum value) of the number of antennas in the terminal device receiving antenna data set #2 is 4, the aggregation level of the search space set #2 may take a value range of {1, 2, 4, 8}, or the aggregation level of the search space set #2 takes a value of one of 1, 2, 4, or 8.

Relation 3

The index of the CORESET associated with the search space set #1 indicates that the resource mapping mode is non-interleaving mapping, and the index of the CORESET associated with the search space set #2 indicates that the resource mapping mode is interleaving mapping.

Table 1 below shows an example of a mapping relationship between the number of receiving antennas and the search space set according to the present application.

TABLE 1

Number of receiving antennas	Indexing of search space collections	Detection period (Unit: slot)
			2	Index 1	10 or 16
4	Index 2	2. 4 or 5

Table 2 below shows another example of the mapping relationship between the number of receiving antennas and the search space set according to the present application.

TABLE 2

Table 3 below shows another example of the mapping relationship between the number of receiving antennas and the search space set according to the present application.

TABLE 3

Number of receiving antennas	Indexing of search space collections	Indexing of CORESET	Resource mapping mode
				2	Index 1	Index a	Non-interleaved mapping
4	Index 2	Index b	Interleaving mapping

Table 4 below shows another example of the mapping relationship between the number of receiving antennas and the search space set according to the present application.

TABLE 4

Number of receiving antennas	Indexing of search space collections	Detection period (Unit: slot)	Grade of polymerization	Resource mapping mode
					2	Index 1	10 or 16	4 or 8	Non-interleaved mapping
4	Index 2	2. 4 or 5	1. 2, 4 or 8	Interleaving mapping

Table 5 below shows another example of the mapping relationship between the number of receiving antennas and the search space set according to the present application.

TABLE 5

Number of receiving antennas	Indexing of search space collections
		2	Index 1
4	Index 2

In the mapping relationship shown in table 5, the detection period of the search space set of index 1 may be greater than that of the search space set of index 2, for example, the detection period of the search space set of index 1 may be 10 slots or 16 slots, and the detection period of the search space set of index 2 may be 2 slots, 4 slots, or 5 slots.

Alternatively, the aggregation level of the search space set of index 1 may be greater than the aggregation level of the search space set of index 2, e.g., the aggregation level of the search space set of index 1 may be 4 or 8, and the aggregation level of the search space set of index 2 may be 1, 2, 4, or 8.

Alternatively, the resource mapping manner of the search space set of index 1 may be non-interleaved mapping, and the resource mapping manner of the search space set of index 2 may be interleaved mapping.

At S210, the access device # a may transmit configuration information # a to the terminal device # a, where the configuration information # a may be used to indicate a parameter of each of the at least two search space sets, where the parameter may include, but is not limited to, at least one of the parameters 1 to 6.

Moreover, the configuration information # a may further indicate a mapping relationship between the at least two search space sets and the at least two terminal device receiving antenna number sets, or the configuration information # a may further indicate a terminal device receiving antenna number set amount corresponding to each of the at least two search space sets.

At S220, when access device # a transmits PDCCH to terminal device # a at time # a, access device # a may determine the number of receiving antennas used by terminal device # a at time # a (denoted as number # a).

For example, the access device # a may determine the number # a according to whether the PDCCH is transmitted to the terminal device # a at a time # B, which is a time before the time # a, and which has a preset time interval # a between the time # B and the time # a, wherein the time interval # a may be specified by a communication system or a communication protocol, or may be determined by an administrator according to data statistics.

Specifically, if the access device # a transmits PDCCH to the terminal device # a at time # B, the access device # a may determine that the value of the number # a is X, where X may be the number of receiving antennas used by the terminal device # a when the data stream is large, for example, the value of X may be 4, where the value of X may be specified by the communication system or the communication protocol, or may be determined by the administrator based on data statistics.

If the access device # a does not transmit PDCCH to the terminal device # a at time # B, the access device # a may determine the value of the number # a as Y, where Y may be the number of receiving antennas used by the terminal device # a when the data stream is small, for example, the value of Y may be 2, where the value of Y may be specified by the communication system or the communication protocol, or may be determined by the administrator based on data statistics.

For another example, the access device # a may instruct the terminal device # a to report the number # a.

For another example, the terminal # a may periodically report the number of used receiving antennas, and thus, the access device # a may determine the number of receiving antennas that the terminal # a reported last time before the time # a as the number # a.

Similarly, terminal apparatus # a can determine the number of currently used reception antennas at time # a.

For example, the terminal apparatus # a may determine the number # a according to whether the PDCCH is detected at a time # B, which is a time before the time # a, and has a preset time interval # a between the time # B and the time # a, which may be specified by a communication system or a communication protocol or determined by an administrator according to data statistics.

Specifically, if terminal apparatus # a detects PDCCH at time # B, terminal apparatus # a may determine the value of number # a as X, where X may be the number of receiving antennas used by terminal apparatus # a when the data stream is large, for example, the value of X may be 4, where the value of X may be specified by the communication system or the communication protocol, or may be determined by the administrator based on data statistics.

If terminal apparatus # a does not detect the PDCCH at time # B, terminal apparatus # a may determine the value of number # a as Y, where Y may be the number of receiving antennas used by terminal apparatus # a when the data stream is small, for example, the value of Y may be 2, where the value of Y may be specified by the communication system or the communication protocol, or may be determined by an administrator according to data statistics.

For another example, the terminal # a may arbitrarily determine the number # a, and the terminal # a may report the number # a according to an instruction of the access device # a.

For another example, terminal apparatus # a may periodically report the number of used receiving antennas, and thus, terminal apparatus # a may determine the number of receiving antennas that terminal apparatus # a reported last time before time # a as number # a.

It should be understood that the above-listed method and procedure for determining the number # a are only exemplary, and the present application is not limited thereto as long as the number # a determined by the access device # a and the terminal device # a can be ensured to be consistent.

Then, the access device # a and the terminal device # a can determine a search space set (referred to as search space set # a) corresponding to the terminal device receiving antenna number set to which the number # a belongs, based on the above mapping relationship.

Thus, at S230, the access device # a may transmit PDCCH on the search space set # a.

Accordingly, terminal device # a may detect PDCCH on search space set # a.

According to the scheme provided by the application, the access equipment configures the mapping relation between the number of the plurality of antennas and the plurality of search space sets for the terminal equipment, and when the terminal equipment detects the PDCCH, the corresponding search space set can be selected to perform PDCCH detection according to the number of the antennas currently used, for example, the detection period of the search space set corresponding to the larger number of the antennas is small, so that the reliability of data transmission can be ensured, and the transmission delay is reduced; the detection period of the search space set corresponding to the smaller number of antennas is shorter, so that the power consumption of the terminal equipment can be reduced; for another example, the aggregation level of the search space set corresponding to the smaller number of antennas is larger, so that the detection performance of the PDCCH can be improved and adapted; the aggregation level of the search space set corresponding to the larger number of the antennas is smaller, so that the system resources are saved; for another example, the resource mapping mode of the search space set with a smaller number of antennas is a non-interleaving mapping mode, so that the access device can effectively utilize the scheduling gain; the resource mapping mode of the search space set with a large number of antennas is an interleaving mapping mode, so that the PDCCH with a low aggregation level can obtain diversity gain; therefore, the method is beneficial to improving the detection performance of the PDCCH, can adapt to the dynamic change of the quantity and the flow, reduces the communication time delay, improves the communication reliability and improves the user experience.

Fig. 11 is a schematic diagram illustrating an example of a method 300 for detecting a downlink control channel according to the present application, and as shown in fig. 11, an access device # a may configure a search space set for a terminal device # a.

And, the access device # a may configure a plurality of parameter sets for the terminal device # a, wherein each parameter set includes at least one search space parameter and a parameter value thereof.

A. detection period of search space set

B. Aggregation level of candidate downlink control channels

For example, an aggregation level may range from {1, 2, 4, 8 }.

C. Indexing of CORESET associated with a set of search spaces

In this application, different parameter sets may correspond to different numbers of receiving antennas (specifically, the number of receiving antennas of the terminal device), or the at least two parameter sets have a one-to-one correspondence relationship with at least two numbers of receiving antennas.

For example, if the parameter group # a corresponds to the terminal device reception antenna data set # a, at least one parameter of the parameter group # a is determined according to the terminal device reception antenna data set # a, and by way of example and not limitation, at least one of the following determination methods may be cited.

Mode 1

When the value (e.g., the maximum value) of the number of terminal device reception antennas in the terminal device reception antenna data set # a is less than or equal to the preset threshold # a, the detection period in the parameter group # a may be configured to be greater than or equal to the preset threshold # b.

When the value (e.g., the minimum value) of the number of terminal device reception antennas in the terminal device reception antenna data set # a is greater than or equal to the preset threshold # c, the detection period of the parameter group # a may be configured to be less than or equal to the preset threshold # d.

Wherein the threshold # a may be less than or equal to the threshold # c.

The threshold # b may be greater than or equal to the threshold # d.

When the number of antennas used by the terminal device is small (for example, 2), it indicates that the data amount of the downlink data is small, and in this case, by setting the detection period of the parameter group # a to a large value, the power consumption of the terminal device can be reduced.

Accordingly, when the number of antennas used by the terminal device is large (for example, 4), which means that the amount of data of the downlink data is large, by setting the detection period of the parameter group # a to a small value, it is possible to reduce the delay of data transmission and improve the reliability of communication.

Mode 2

When the number of values (for example, the maximum value) of the number of terminal device reception antennas in the terminal device reception antenna data set # a is less than or equal to the preset threshold # e, the aggregation level of the parameter group # a may be configured to be greater than or equal to the preset threshold # f.

When the number of values (e.g., the minimum value) of the number of terminal device reception antennas in the terminal device reception antenna data set # a is greater than or equal to the preset threshold # g, the aggregation level of the parameter group # a may be configured to be less than or equal to the preset threshold # h.

Wherein the threshold # e may be less than or equal to the threshold # g.

The threshold # f may be greater than or equal to the threshold # h.

In this case, the value of the threshold # f may be 4, and the value of the threshold # h may be 2

Mode 3

When the number of values (e.g., the maximum value) of the number of terminal device receive antennas in the terminal device receive antenna data set # a is less than or equal to the preset threshold # i, the index of the CORESET of the parameter set # a may be determined as the index # a, where the CCE mapping manner of the CORESET of the index # a is non-interleaved mapping, and thus the resource mapping manner of the CCEs of the candidate control channels of the search space set based on the parameter set # a is non-interleaved mapping.

When the number of values (e.g., the minimum value) of the number of terminal device receive antennas in the terminal device receive antenna data set # a is greater than or equal to the preset threshold # j, the index of the CORESET of the parameter set # a may be determined as the index # b, where the CCE mapping manner of the CORESET of the index # b is interleaving mapping, and thus the resource mapping manner of the CCEs of the candidate control channel based on the search space set of the parameter set # a is interleaving mapping.

Wherein the threshold # i may be less than or equal to the threshold # j.

For example, the value of the threshold # i may be 2, and the value of the threshold # j may be 4.

For another example, if the parameter group #1 corresponds to the terminal apparatus reception antenna data set #1 and the parameter group #1 corresponds to the terminal apparatus reception antenna data set #2, the parameter group # a and the parameter group # a may satisfy at least one of the following relationships if the value (for example, the maximum value) of the reception number of terminal antennas in the terminal apparatus reception antenna data set #1 is smaller than the value (for example, the minimum value) of the reception number of terminal antennas in the terminal apparatus reception antenna data set # 2.

Relation 1

As shown in fig. 10, the detection period of the parameter group #1 is larger than the detection period of the parameter group # 2.

Alternatively, the detection time interval of the parameter group #1 is larger than that of the parameter combination # 2.

When the number of antennas used by the terminal device is large (for example, 4), it indicates that the data amount of downlink data is large, and accordingly, when the number of antennas used by the terminal device is small (for example, 2), it indicates that the data amount of downlink data is small, that is, when the value (for example, the maximum value) of the reception number of terminal antennas in the terminal device reception antenna data set #1 is smaller than the value (for example, the minimum value) of the reception number of terminal antennas in the terminal device reception antenna data set #2, the data amount of downlink transmission corresponding to the parameter set #1 is smaller than the data amount of downlink transmission corresponding to the parameter set # 1.

From this, it is understood that the number traffic of the terminal devices is small when the parameter group #1 is used, and in this case, by setting the detection cycle of the parameter group #1 to a large value, the power consumption of the terminal device can be reduced.

In contrast, when the parameter set #2 is used, the number of terminal devices is large, and in this case, the detection period of the parameter set #2 is set to a small value, so that the delay of data transmission can be reduced and the reliability of communication can be improved.

For example, when the value (e.g., the maximum value) of the terminal antenna reception number in the terminal device reception antenna data set #1 is 2, the detection period of the parameter set #1 may be 10 slots or 16 slots.

For another example, when the value (e.g., the minimum value) of the terminal antenna reception number in the terminal device reception antenna data set #2 is 4, the detection period of the parameter set #2 may be 2 slots, 4 slots, or 5 slots.

Relation 2

The value range of the aggregation level of the parameter group #1 is smaller than the value range of the aggregation level of the parameter group # 2.

For example, when the value (e.g., the maximum value) of the terminal antenna reception number in the terminal device reception antenna data set #1 is 2, the aggregation level of the parameter group #1 may take a value range of {4, 8}, or in other words, the aggregation level of the parameter group #1 takes a value of 4 or 8.

When the value (e.g., the minimum value) of the number of terminal antenna receptions in the terminal device reception antenna data set #2 is 4, the aggregation level of the parameter group #2 may take on a value range of {1, 2, 4, 8}, or the aggregation level of the parameter group #2 takes on one of 1, 2, 4, or 8.

Relation 3

The resource mapping scheme of the parameter set #1 is non-interleaving mapping, and the resource mapping scheme of the parameter set #2 is interleaving mapping.

Table a below shows an example of a mapping relationship between the number of receiving antennas and the parameter group according to the present application.

TABLE a

The following table b shows another example of the mapping relationship between the number of receiving antennas and the parameter set according to the present application.

Table b

Number of receiving antennas	Indexing of parameter sets	Grade of polymerization
			2	Index 1	4 or 8
4	Index 2	1. 2, 4 or 8

The following table c shows another example of the mapping relationship between the number of receiving antennas and the parameter set in the present application.

Table c

Number of receiving antennas	Indexing of parameter sets	Indexing of CORESET	Resource mapping mode
				2	Index 1	Index a	Non-interleaved mapping
4	Index 2	Index b	Interleaving mapping

Table d below shows another example of the mapping relationship between the number of receiving antennas and the parameter set in the present application.

Table d

Number of receiving antennas	Indexing of parameter sets	Detection period (Unit: slot)	Grade of polymerization	Resource mapping mode
					2	Index 1	10 or 16	4 or 8	Non-interleaved mapping
4	Index 2	2. 4 or 5	1. 2, 4 or 8	Interleaving mapping

The following table e shows another example of the mapping relationship between the number of receiving antennas and the search space set.

Table e

In the mapping relationship shown in table e, the detection period of the parameter group with index 1 may be greater than that of the parameter group with index 2, for example, the detection period of the parameter group with index 1 may be 10 slots or 16 slots, and the detection period of the parameter group with index 2 may be 2 slots, 4 slots or 5 slots.

Alternatively, the aggregation level of the parameter group of index 1 may be greater than that of the parameter group of index 2, for example, the aggregation level of the parameter group of index 1 may be 4 or 8, and the aggregation level of the parameter group of index 2 may be 1, 2, 4, or 8.

Alternatively, the resource mapping method for the parameter group of index 1 may be non-interleaved mapping, and the resource mapping method for the parameter group of index 2 may be interleaved mapping.

At S310, the access device # a may transmit configuration information # a to the terminal device # a, which may be used to indicate one search space set (denoted as search space set # a) configured for the terminal device # a.

Also, the configuration information # a may further indicate a mapping relationship between the at least two parameter sets and at least two sets of receiving antenna numbers of the terminal device, or the configuration information # a may further indicate a set of receiving antenna numbers of the terminal device corresponding to each of the at least two parameter sets.

At S320, when the access device # a transmits the PDCCH to the terminal device # a at time # a, the access device # a may determine the number of receiving antennas (denoted as number # a) used by the terminal device # a at time # a.

For example, the access device # a may determine the number # a according to whether the PDCCH is transmitted to the terminal device # a at a time # b, where the time # b is a time before the time # a, and a preset time interval # a is provided between the time # b and the time # a, where the time interval # a may be specified by a communication system or a communication protocol, or may be determined by an administrator according to data statistics.

For another example, the terminal # a may periodically report the number of used receiving antennas, and thus, the access device # a may determine the number of receiving antennas that the terminal # a reports last before the time # a as the number # a.

Similarly, the terminal apparatus # a can determine the number of currently used reception antennas at the time # a.

For example, the terminal apparatus # a may determine the number # a according to whether the PDCCH is detected at a time # b, where the time # Bb is a time before the time # a, and the time # b and the time # a have a preset time interval # a therebetween, where the time interval # a may be specified by a communication system or a communication protocol, or may be determined by an administrator according to data statistics.

Specifically, if the terminal apparatus # a detects the PDCCH at the time # b, the terminal apparatus # a may determine the value of the number # a as X, where X may be the number of receiving antennas used by the terminal apparatus # a when the data stream is large, for example, the value of X may be 4, where the value of X may be specified by the communication system or the communication protocol, or may be determined by the administrator based on data statistics.

If the terminal apparatus # a does not detect the PDCCH at the time # b, the terminal apparatus # a may determine the value of the number # a as Y, where Y may be the number of receiving antennas used by the terminal apparatus # a when the data stream is small, for example, the value of Y may be 2, where the value of Y may be specified by the communication system or the communication protocol, or may be determined by an administrator according to data statistics.

For another example, the terminal apparatus # a may periodically report the number of used receiving antennas, and thus, the terminal apparatus # a may determine the number of receiving antennas that the terminal apparatus # a reports last before the time # a as the number # a.

Then, the access device # a and the terminal device # a can specify a parameter group (referred to as parameter group # a) corresponding to the terminal device receiving antenna number set to which the number # a belongs, based on the above mapping relationship.

Thus, at S330, the access device # a may transmit PDCCH using the parameter set # a on the search space set # a.

Accordingly, the terminal device # a may detect the PDCCH using the parameter set # a on the search space set # a.

Fig. 12 is a schematic diagram illustrating an example of a method 400 for detecting a downlink control channel according to the present application, and as shown in fig. 12, an access device #1 may configure a plurality of search space sets for a terminal device # 1.

By way of example and not limitation, the set of search spaces may be a user-specific set of search spaces for terminal device # 1.

Also, in the present application, the search space set parameter may include a detection period.

In the present application, different search space sets may correspond to different timers (e.g., drx-onDurationTimer and drx-inactivity timer), or the at least two search space sets have a one-to-one correspondence with at least two timers.

For example, assuming that the search space set #1 corresponds to the timer #1, at least one parameter of the search space set #1 is determined according to the timer # 1.

When the timer #1 is drx-onDurationTimer, a detection period of the search space set #1 may be configured to be greater than or equal to a preset threshold # 2.

When the timer #1 is drx-InactivityTimer, the detection period of the search space set #1 may be configured to be less than or equal to a preset threshold # 4.

Wherein, the threshold #1 may be less than or equal to the threshold # 3.

The threshold #2 may be greater than or equal to the threshold # 4.

For example, the threshold #1 may have a value of 2, and the threshold #3 may have a value of 4.

For another example, threshold #2 may be 10 slots or 16 slots, and threshold #4 may be 2 slots, 4 slots, or 5 slots.

When the drx-onDurationTimer is running (or, in other words, started), it indicates that the data amount of the downlink data is small, and in this case, by setting the detection period of the search space set #1 to a large value, the power consumption of the terminal device can be reduced.

Accordingly, when the drx-inactivity timer is operated, it indicates that the data amount of the downlink data is large, and in this case, by setting the detection period of the search space set #1 to a small value, it is possible to reduce the delay of data transmission and improve the reliability of communication.

As shown in fig. 13, the detection period of the search space set # a is greater than that of the search space set # b.

Alternatively, the detection time interval of the search space set # a is greater than the detection time interval of the search space set # b.

Table 6 below shows an example of a mapping relationship between the timer and the search space set according to the present application.

TABLE 6

Timer	Indexing of search space collections	Detection period (Unit: slot)
			drx-onDurationTimer	Index	1	10 or 16
drx-InactivityTimer	Index	2					2. 4 or 5

Table 7 below shows another example of the mapping relationship between the timer and the search space set according to the present application.

TABLE 7

Timer	Indexing of search space collections
		drx-onDurationTimer	Index	1
drx-InactivityTimer	Index				2

In the mapping relationship shown in table 7, the detection period of the search space set of index 1 may be greater than that of the search space set of index 2, for example, the detection period of the search space set of index 1 may be 10 slots or 16 slots, and the detection period of the search space set of index 2 may be 2 slots, 4 slots, or 5 slots.

At S410, the access device #1 may transmit configuration information #1 to the terminal device #1, where the configuration information #1 may be used to indicate a parameter of each of the at least two search space sets, where the parameter may include, but is not limited to, at least one of the parameter 1 to the parameter 6.

Moreover, the configuration information #1 may further indicate a mapping relationship between the at least two search space sets and at least two timers, or the configuration information #1 may further indicate a timer corresponding to each of the at least two search space sets.

At S420, when the access device #1 transmits the PDCCH to the terminal device #1 at time #1, the access device #1 may determine a timer (note, timer # X) that the terminal device #1 starts at time # 1.

For example, the access device #1 may determine the timer # X according to the DRX cycle configured for the terminal device #1 and whether the PDCCH is transmitted to the terminal device #1 at time #2, where time #2 is a time before time #1, and there is a preset time interval #1 between time #2 and time #1, where the time interval #1 may be specified by a communication system or a communication protocol, or may be determined by an administrator according to data statistics.

Specifically, if the access device #1 transmits the PDCCH to the terminal device #1 at time #2, the access device #1 may determine that the timer # X is drx-inactivity timer.

If access device #1 does not transmit a PDCCH to terminal device #1 at time #2, access device #1 may determine that timer # X is drx-onDurationTimer.

Also, the terminal apparatus #1 can determine the timer # X that operates at the time # 1.

It should be understood that the above listed method and procedure for determining the timer # X are only exemplary, and the present application is not limited thereto as long as it can ensure that the timers # X determined by the access device #1 and the terminal device #1 are consistent.

Then, the access device #1 and the terminal device #1 can determine the search space set (referred to as search space set #1) corresponding to the timer # X according to the above mapping relationship.

Thus, at S430, the access device #1 may transmit PDCCH on the search space set # 1.

Accordingly, terminal device #1 may detect PDCCH on search space set # 1.

According to the scheme provided by the application, the access equipment configures mapping relations between a plurality of timers and a plurality of search space sets for the terminal equipment, and when the terminal equipment detects the PDCCH, the terminal equipment can select the corresponding search space set to perform PDCCH detection according to the currently used timer, for example, the detection period of the search space set corresponding to drx-InactivityTimer is small, so that the reliability of data transmission can be ensured, and the transmission delay is reduced; the detection period of the search space set corresponding to the drx-onDurationTimer is shorter, so that the power consumption of the terminal equipment can be reduced, the detection performance of the PDCCH can be favorably improved, the dynamic change of the quantity and the flow can be adapted, the communication delay is reduced, the communication reliability is improved, and the user experience is improved.

Fig. 14 is a schematic diagram illustrating an example of a method 500 for detecting a downlink control channel according to the present application, and as shown in fig. 12, an access device # m may configure a search space set (denoted as search space # m) for a terminal device # m.

By way of example and not limitation, the set of search spaces may be a user-specific set of search spaces for terminal device # m.

And, the access device # m may configure a plurality of parameter sets for the terminal device # m, wherein each parameter set includes at least one search space parameter and a parameter value thereof.

Also, in the present application, the search space set parameter may include, but is not limited to, a detection period.

In the present application, different parameter sets may correspond to different timers (e.g., drx-onDurationTimer and drx-inactivity timer), or the at least two parameter sets have a one-to-one correspondence with the at least two timers.

For example, if the parameter set # m corresponds to the timer # m, at least one parameter of the parameter set # m is determined according to the timer # m.

When the timer # m is drx-onDurationTimer, the detection period of the parameter group # m may be configured to be greater than or equal to a preset threshold # 2.

When the timer # m is drx-InactivityTimer, the detection period of the parameter set # m may be configured to be less than or equal to a preset threshold # 4.

Wherein the threshold # m may be less than or equal to the threshold # 3.

The threshold #2 may be greater than or equal to the threshold # 4.

For example, the value of the threshold # m may be 2, and the value of the threshold #3 may be 4.

When the drx-onDurationTimer is running (or, starting up), it indicates that the data amount of the downlink data is small, in this case, by setting the detection period of the parameter group # m to a large value, the power consumption of the terminal apparatus can be reduced.

Accordingly, when the drx-inactivity timer is operated, it indicates that the data amount of the downlink data is large, and in this case, by setting the detection period of the parameter group # m to a small value, it is possible to reduce the delay of data transmission and improve the reliability of communication.

As shown in fig. 13, the detection period of the parameter group # a is longer than the detection period of the parameter group # b.

Alternatively, the detection interval of the search space set # a is greater than the detection interval of the parameter combination # b.

Table f below shows an example of a mapping relationship between the timer and the parameter group according to the present application.

Table f

Timer	Indexing of parameter sets	Detection period (Unit: slot)
			drx-onDurationTimer	Index	1	10 or 16
drx-InactivityTimer	Index	2					2. 4 or 5

The following table g shows another example of the mapping relationship between the timer and the parameter group according to the present application.

TABLE g

In the mapping relationship shown in table g, the detection period of the parameter group of index 1 may be greater than that of the parameter group of index 2, for example, the detection period of the parameter group of index 1 may be 10 slots or 16 slots, and the detection period of the parameter group of index 2 may be 2 slots, 4 slots or 5 slots.

At S510, the access device # m may transmit configuration information # m to the terminal device # m, where the configuration information # m may be used to refer to a parameter of the search space # m, where the parameter may include, but is not limited to, at least one of the parameters 1 to 6.

The configuration information # m may further indicate a mapping relationship between the at least two parameter sets and at least two timers, or the configuration information # m may further indicate a timer corresponding to each of the at least two parameter sets.

At S520, when the access device # m transmits the PDCCH to the terminal device # m at time # m, the access device # m may determine a timer (note, timer # m) that the terminal device # m starts at time # m.

For example, the access device # m may determine the timer # m according to the DRX cycle configured for the terminal device # m and whether the PDCCH is transmitted to the terminal device # m at a time # n, where the time # n is a time before the time # m, and there is a preset time interval # m between the time # n and the time # m, where the time interval # m may be specified by a communication system or a communication protocol, or may be determined by an administrator according to data statistics.

Specifically, if the access device # m transmits a PDCCH to the terminal device # m at time # n, the access device # m may determine that the timer # m is drx-inactivity timer.

If the access device # m does not transmit the PDCCH to the terminal device # m at time # n, the access device # m may determine that the timer # m is drx-onDurationTimer.

Also, the terminal apparatus # m can determine the timer # m that operates at the time # m.

It should be understood that the above-listed method and procedure for determining the timer # m are only exemplary, and the present application is not limited thereto as long as it can ensure that the timers # m determined by the access device # m and the terminal device # m are consistent.

Then, the access device # m and the terminal device # m can specify the parameter group (denoted as parameter group # m) corresponding to the timer # X based on the above mapping relationship.

Thus, at S530, the access device # m may transmit the PDCCH using the parameter set # m on the search space set # m.

Accordingly, the terminal apparatus # m can detect the PDCCH using the parameter set # m on the search space set # m.

Fig. 15 is a schematic diagram of an apparatus 500 for wireless communication according to the foregoing method.

The apparatus 600 may be a terminal device, or may be a chip or a circuit, for example, a chip or a circuit that may be disposed on a terminal device.

The apparatus 600 may include a processing unit 610 (i.e., an example of a processing unit) and a storage unit 620. The storage unit 620 is used to store instructions.

The processing unit 610 is configured to execute the instructions stored by the storage unit 620, so as to enable the apparatus 600 to implement the steps performed by the terminal device (e.g., terminal device # a or terminal device #1) in the method described above.

Further, the apparatus 600 may further include an input port 630 (i.e., one side of the communication unit) and an output port 640 (i.e., another side of the communication unit). Further, the processing unit 610, the memory unit 620, the input port 630, and the output port 640 may communicate with each other via internal communication paths to transmit control and/or data signals. The storage unit 620 is used for storing a computer program, and the processing unit 610 may be used for calling and running the computer program from the storage unit 620 to control the input port 630 to receive a signal and control the output port 640 to send a signal, so as to complete the steps of the terminal device in the above method. The storage unit 620 may be integrated into the processing unit 610 or may be provided separately from the processing unit 610.

Alternatively, if the apparatus 600 is a communication device (e.g., a terminal device), the input port 630 is a receiver and the output port 640 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 device 600 is a chip or a circuit, the input port 630 is an input interface, and the output port 640 is an output interface.

As an implementation manner, the functions of the input port 630 and the output port 640 may be implemented by a transceiver circuit or a dedicated chip for transceiving. The processing unit 610 may be considered to be implemented by a dedicated processing chip, a processing circuit, a processing unit or a general-purpose chip.

As another implementation manner, a communication device (e.g., an access device or a terminal device) provided by the embodiment of the present application may be implemented by using a general-purpose computer. Program codes that will realize the functions of the processing unit 610, the input port 630, and the output port 640 are stored in the storage unit 620, and a general-purpose processing unit realizes the functions of the processing unit 610, the input port 630, and the output port 640 by executing the codes in the storage unit 620.

In one implementation, the processing unit 610 is configured to determine a first set of search spaces according to a number of currently used receiving antennas; the processing unit 610 is configured to control the input port 630 to detect a downlink control channel according to the first search space set.

Optionally, the processing unit 610 is configured to determine a first search space set from at least two search spaces according to the number of currently used receiving antennas, where at least one different parameter exists between any two search space sets of the at least two search space sets, where the parameter includes:

detecting period, aggregation level or resource mapping mode or search space set index.

Optionally, the input port 630 is configured to receive first configuration information, where the first configuration information is used to indicate a mapping relationship between at least two numbers of receiving antennas and at least two search space sets;

the processing unit 610 is configured to determine, by the terminal device, a search space set corresponding to the currently used number of receiving antennas, which is indicated by the first configuration information, as a first search space set.

Optionally, the processing unit 610 is configured to determine a parameter of the first search space set according to the number of currently used receiving antennas, where the parameter includes at least one parameter of a detection period, an aggregation level, or a resource mapping manner.

Optionally, the input port 630 is configured to receive second configuration information, where the second configuration information is used to indicate a number of receiving antennas corresponding to each parameter group in a plurality of parameter groups, where each parameter group includes a parameter value of at least one parameter of a detection period, an aggregation level, or a resource mapping manner;

the processing unit 610 is configured to determine a parameter in the parameter group corresponding to the currently used number of receiving antennas, which is indicated by the second configuration information, as a parameter of the first search space set.

The functions and actions of the modules or units in the apparatus 600 listed above are only exemplary descriptions, the apparatus 600 is configured or itself is a terminal device, and the modules or units in the apparatus 600 may be used to execute the actions or processes executed by the terminal device (for example, terminal device # a or terminal device # z1) in the above method, and therefore, detailed descriptions thereof are omitted for avoiding redundancy.

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 600, reference is made to the descriptions of the foregoing methods or other embodiments, which are not repeated herein.

Fig. 16 is a schematic diagram of an apparatus 700 for wireless communication according to the foregoing method.

The apparatus 700 may be an access device (e.g., access device # a or access device #1), or may be a chip or a circuit, such as a chip or a circuit that can be disposed on the access device.

The apparatus 700 may include a processing unit 710 (i.e., an example of a processing unit) and a storage unit 720. The storage unit 720 is used to store instructions.

The processing unit 710 is configured to execute the instructions stored by the storage unit 720, so as to enable the apparatus 700 to implement the steps performed by the access device in the method described above.

Further, the apparatus 700 may further include an input port 730 (i.e., one side of the communication unit) and an output port 740 (i.e., another side of the communication unit). Further, the processing unit 710, the memory unit 720, the input 730 and the output 740 may communicate with each other via internal connection paths to transmit control and/or data signals. The storage unit 720 is used for storing a computer program, and the processing unit 710 may be used for calling and running the computer program from the storage unit 720 to control the input port 730 to receive a signal and the output port 740 to send a signal, so as to complete the steps of the terminal device in the above method. The storage unit 720 may be integrated into the processing unit 710 or may be provided separately from the processing unit 710.

Alternatively, if the apparatus 700 is a communication device (e.g., an access device), the input port 730 is a receiver and the output port 740 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 device 700 is a chip or a circuit, the input port 730 is an input interface and the output port 740 is an output interface.

As an implementation, the functions of the input port 730 and the output port 740 may be implemented by a transceiver circuit or a dedicated chip for transceiving. The processing unit 710 may be considered to be implemented by a dedicated processing chip, a processing circuit, a processing unit, or a general-purpose chip.

As another implementation manner, a communication device (e.g., an access device) provided by the embodiment of the present application may be implemented by using a general-purpose computer. Program codes that will realize the functions of processing unit 710, input ports 730 and output ports 740 are stored in memory unit 720, and a general-purpose processing unit realizes the functions of processing unit 710, input ports 730 and output ports 740 by executing the codes in memory unit 720.

In one implementation, the processing unit 710 is configured to determine a first search space set according to the number of receiving antennas currently used by the terminal device;

the processing unit 710 is configured to control the output port 740 to send the downlink control channel according to the first search space set.

Optionally, the processing unit 710 is configured to determine a mapping relationship between at least two numbers of receiving antennas and at least two search space sets, where at least one different parameter exists between any two search space sets of the at least two search space sets, where the parameter includes: detecting a period, an aggregation level or a resource mapping mode or a search space set index; and is configured to determine a search space set corresponding to the currently used number of receive antennas as a first search space set.

Optionally, the output port 740 is configured to send first configuration information to the terminal device, where the first configuration information is used to indicate a mapping relationship between the at least two receiving antenna numbers and the at least two search space sets.

Optionally, the processing unit 710 is configured to determine the number of receiving antennas corresponding to each parameter group in a plurality of parameter groups, where each parameter group includes a parameter value of at least one parameter of a detection period, an aggregation level, or a resource mapping manner; and the parameter in the parameter group corresponding to the number of the receiving antennas currently used by the terminal equipment is determined as the parameter of the first search space set.

Optionally, the output port 740 is configured to send second configuration information to the terminal device, where the second configuration information is used to indicate the number of receiving antennas corresponding to each parameter group in the plurality of parameter groups.

The functions and actions of the modules or units in the apparatus 700 listed above are only exemplary descriptions, and when the apparatus 700 is configured or is itself an access device, the modules or units in the apparatus 700 may be configured to execute the actions or processes executed by the access device (for example, access device # a or access device #1) in the foregoing method, and here, detailed descriptions thereof are omitted to avoid redundancy.

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 700, reference is made to the descriptions of the foregoing methods or other embodiments, which are not repeated herein.

Fig. 17 is a schematic structural diagram of a terminal device 800 according to the present application. The apparatus 600 may be configured in the terminal device 800, or the apparatus 600 itself may be the terminal device 800. Alternatively, the terminal device 800 may perform the actions performed by the terminal device in the methods 200, 300, 400 or 500 described above.

For convenience of explanation, fig. 17 shows only main components of the terminal device. As shown in fig. 17, the terminal device 800 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. 17 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.

For example, the processor may include a baseband processor and a central processing unit, the baseband processor is mainly used for processing the communication protocol and the communication data, and the central processing unit is mainly used for controlling the whole terminal device, executing the software program, and processing the data of the software program. The processor in fig. 17 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 with transceiving functions may be regarded as the transceiving unit 810 of the terminal device 800, and the processor with processing function may be regarded as the processing unit 820 of the terminal device 800. As shown in fig. 800, the terminal device 800 includes a transceiving unit 810 and a processing unit 820. 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 810 may be regarded as a receiving unit, and a device for implementing the transmitting function in the transceiver 810 may be regarded as a transmitting unit, that is, the transceiver 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. 18 is a schematic structural diagram of an access device 900 according to an embodiment of the present application, which may be used to implement the function of an access device (e.g., access device # a or access device #1) in the foregoing method. The access device 900 includes one or more radio frequency units, such as a Remote Radio Unit (RRU) 910 and one or more baseband units (BBUs) (also referred to as digital units, DUs) 920. The RRU910 may be referred to as a transceiver unit, transceiver circuit, or transceiver, etc., and may include at least one antenna 911 and a radio frequency unit 912. The RRU910 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 BBU920 part is mainly used for performing baseband processing, controlling a base station, and the like. The RRU910 and the BBU920 may be physically disposed together or may be physically disposed separately, i.e., distributed base stations.

The BBU920 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, and spreading. For example, the BBU (processing unit) 920 can be used to control the base station 40 to execute the operation flow related to the network device in the above method embodiment.

In an example, the BBU920 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 BBU920 also includes a memory 921 and a processor 922. The memory 921 is used to store the necessary instructions and data. For example, the memory 921 stores the codebook and the like in the above-described embodiments. The processor 922 is configured to control the base station to perform necessary actions, for example, to control the base station to perform the operation procedure related to the network device in the above method embodiment. The memory 921 and processor 922 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

parts

920 and 910 may be implemented by SoC technology, for example, by a base station function chip integrating 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 executed by the processor 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 access device illustrated in fig. 18 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 access 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), synchronous 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. Further, herein the term "at least one of … …" or "at least one of … …", or the like, means any combination of the listed items, e.g., at least one of A, B and C (or at least one of A, B or C), may mean: seven cases of A alone, B alone, C alone, A and B together, A and C together, B and C together, and A, B and C together exist. 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: u disk, removable hard disk, read only memory, random access memory, magnetic or optical disk, etc. for storing program codes.

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 wireless communication, comprising:

the terminal equipment determines a first search space set according to the number of currently used receiving antennas;

and the terminal equipment detects a downlink control channel according to the first search space set.

2. The method of claim 1, wherein the terminal device determines the first set of search spaces according to a currently used number of receiving antennas, and comprises:

and the terminal equipment determines the first search space set from at least two search space sets according to the number of currently used receiving antennas.

3. The method of claim 2, each of the at least two sets of search spaces being associated with a set of terminal device number of receive antennas, wherein the set of terminal device number of receive antennas comprises at least one number of terminal device receive antennas, an

And the first search space set is a search space set of the number of the receiving antennas of the associated terminal equipment, wherein the search space set comprises the number of the receiving antennas currently used by the terminal equipment.

4. The method according to claim 2 or 3, wherein there is at least one different parameter between any two of the at least two sets of search spaces, the parameter comprising:

the detection period of the search space set, the aggregation level of the candidate downlink control channels or the index of the control resource set CORESET associated with the search space set.

5. The method according to any one of claims 2 to 4, further comprising:

and the terminal equipment receives first configuration information, wherein the first configuration information is used for indicating a terminal equipment receiving antenna number set associated with each search space set in the at least two search space sets.

6. The method of claim 1, wherein the terminal device determines the first set of search spaces according to a currently used number of receiving antennas, and comprises:

the terminal equipment determines parameters of the first search space set according to the number of currently used receiving antennas, wherein the parameters comprise at least one parameter of a detection period of the search space set, an aggregation level of candidate downlink control channels and an index of CORESET associated with the search space set.

7. The method of claim 6, wherein the parameters of the first search space set comprise at least two parameter sets, each parameter set is associated with a terminal device receiving antenna number set, wherein the terminal device receiving antenna number set comprises at least one terminal device receiving antenna number, each parameter set comprises parameter values of at least one parameter of a detection period of the search space set, an aggregation level of candidate downlink control channels, and an index of a CORESET associated with the search space set, and

the parameters of the first search space set are parameters in a parameter group of the associated terminal equipment receiving antenna number set including the number of receiving antennas currently used by the terminal equipment.

8. The method of claim 7, further comprising:

and the terminal equipment receives second configuration information, wherein the second configuration information is used for indicating the number of receiving antennas associated with each parameter group in the at least two parameter groups.

9. The method according to any of claims 1 to 8, wherein the at least two search space sets are dedicated search space sets of the terminal device.

10. A method of wireless communication, comprising:

the access equipment determines a first search space set according to the number of receiving antennas currently used by the terminal equipment;

and the access equipment sends a downlink control channel according to the first search space set.

11. The method of claim 10, wherein the determining, by the access device, the first set of search spaces according to the number of currently used receiving antennas of the terminal device comprises:

the access equipment determines a first search space set from at least two search space sets according to the number of currently used receiving antennas.

12. The method of claim 11, wherein each of the at least two sets of search spaces is associated with a set of terminal device receive antenna numbers, wherein the set of terminal device receive antenna numbers comprises at least one terminal device receive antenna number, and wherein

13. The method according to claim 11 or 12, wherein there is at least one different parameter between any two of the at least two sets of search spaces, the parameter comprising:

14. The method according to claim 12 or 13, characterized in that the method further comprises:

the access device sends first configuration information, where the first configuration information is used to indicate the number of receiving antennas associated with each of the at least two search space sets.

15. The method of claim 10, wherein the determining, by the access device, the first set of search spaces according to the number of currently used receiving antennas of the terminal device comprises:

and the access equipment determines parameters of the first search space set according to the number of the receiving antennas currently used by the terminal equipment, wherein the parameters comprise at least one parameter of a detection period of the search space set, an aggregation level of the candidate downlink control channels and an index of a CORESET associated with the search space set.

16. The method of claim 15, wherein the parameters of the first search space set comprise at least two parameter sets, each parameter set is associated with a terminal device receiving antenna number set, wherein the terminal device receiving antenna number set comprises at least one terminal device receiving antenna number, each parameter set comprises parameter values of at least one parameter of a detection period of the search space set, an aggregation level of candidate downlink control channels, and an index of a CORESET associated with the search space set, and

17. The method of claim 16, further comprising:

the access device sends second configuration information, where the second configuration information is used to indicate the number of receiving antennas associated with each parameter group in the at least two parameter groups.

18. The method according to any of claims 10 to 17, wherein the at least two search space sets are dedicated search space sets of the terminal device.

19. A terminal device, comprising:

the processing unit is used for determining a first search space set according to the number of the receiving antennas currently used by the terminal equipment;

and the transceiver unit is used for detecting the downlink control channel according to the first search space set.

20. The apparatus of claim 19, wherein the processing unit is further configured to:

and determining the first search space set from at least two search space sets according to the number of receiving antennas currently used by the terminal equipment.

21. The apparatus of claim 19, each of the at least two sets of search spaces is associated with a set of terminal device receive antenna numbers, wherein a set of receive antenna numbers includes at least one terminal device receive antenna number, and

22. The apparatus of claim 20 or 21, wherein at least one different parameter exists between any two of the at least two sets of search spaces, and wherein the parameter comprises:

23. The apparatus according to any of claims 20 to 22, wherein the transceiver unit is further configured to:

and receiving first configuration information, wherein the first configuration information is used for indicating a set of receiving antenna numbers of the terminal equipment associated with each of the at least two search space sets.

24. The apparatus of claim 19, wherein the processing unit is further configured to:

and determining parameters of a first search space set according to the number of receiving antennas currently used by the terminal equipment, wherein the parameters comprise at least one parameter of a detection period of the search space set, an aggregation level of the candidate downlink control channels and an index of a CORESET associated with the search space set.

25. The apparatus of claim 24, wherein the parameters of the first search space set comprise at least two parameter sets, each parameter set is associated with a terminal device receiving antenna number set, wherein the terminal device receiving antenna number set comprises at least one terminal device receiving antenna number, each parameter set comprises parameter values of at least one parameter of a detection period of the search space set, an aggregation level of candidate downlink control channels, and an index of a CORESET associated with the search space set, and wherein

26. The apparatus of claim 25, wherein the transceiver unit is further configured to:

receiving second configuration information, where the second configuration information is used to indicate the number of receiving antennas associated with each of the at least two parameter groups.

27. The apparatus according to any of claims 19-26, wherein the at least two search space sets are dedicated search space sets for the terminal device.

28. An access device, comprising:

the processing unit is used for determining a first search space set according to the number of currently used receiving antennas of the terminal equipment;

and the transceiver unit is used for transmitting the downlink control channel according to the first search space set.

29. The apparatus of claim 28, wherein the processing unit is further configured to:

and determining a first search space set from at least two search space sets according to the number of currently used receiving antennas.

30. The apparatus of claim 29, wherein each of the at least two sets of search spaces is associated with a set of terminal device receive antenna numbers, wherein the set of terminal device receive antenna numbers comprises at least one terminal device receive antenna number, and wherein

31. The apparatus according to claim 29 or 30, wherein there is at least one different parameter between any two of the at least two sets of search spaces, the parameter comprising:

32. The apparatus according to claim 30 or 31, wherein the transceiver unit is further configured to:

and sending first configuration information, wherein the first configuration information is used for indicating the number of receiving antennas associated with each of the at least two search space sets.

33. The apparatus of claim 28, wherein the processing unit is further configured to:

34. The apparatus of claim 33, wherein the parameters of the first search space set comprise at least two parameter sets, each parameter set is associated with a terminal device receiving antenna number set, wherein the terminal device receiving antenna number set comprises at least one terminal device receiving antenna number, each parameter set comprises parameter values of at least one parameter of a detection period of the search space set, an aggregation level of candidate downlink control channels, and an index of a CORESET associated with the search space set, and wherein

35. The apparatus of claim 34, wherein the transceiver unit is further configured to:

and sending second configuration information, wherein the second configuration information is used for indicating the number of receiving antennas associated with each parameter group in the at least two parameter groups.

36. The apparatus according to any of claims 28-35, wherein the at least two search space sets are dedicated search space sets for the terminal device.

37. A computer-readable storage medium, having stored thereon a computer program which, when run on a computer,

cause the computer to perform the method of any one of claims 1 to 9, or

Causing the computer to perform the method of any one of claims 10 to 18.

38. A chip system, comprising: a processor for calling and running the computer program from the memory,

causing a communication device on which the chip system is mounted to perform the method of any one of claims 1 to 9; or

Causing a communication device on which the chip system is mounted to perform the method of any one of claims 10 to 18.

39. An apparatus for wireless communication, the apparatus comprising a processor and a storage medium having instructions stored thereon that, when executed by the processor,

cause the processor to perform the method of any one of claims 1 to 9, or

Causing the processor to perform the method of any one of claims 10 to 18.