CN113163503A

CN113163503A - Method for receiving and transmitting downlink data channel and communication device

Info

Publication number: CN113163503A
Application number: CN202010076824.2A
Authority: CN
Inventors: 花梦; 余书静; 焦淑蓉
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2020-01-23
Filing date: 2020-01-23
Publication date: 2021-07-23

Abstract

The application provides a method and a communication device for receiving and transmitting a downlink data channel, under the condition that a network device transmits a PDCCH on one PDCCH candidate among a plurality of PDCCH candidates, and a terminal device possibly detects the PDCCH on another PDCCH among the plurality of PDCCH candidates, the network device and the terminal device determine the time-frequency resource of a PDSCH on the basis that the PDCCH is transmitted on the PDCCH candidate with the largest aggregation level among the plurality of PDCCH candidates, or the network device and the terminal device determine the time-frequency resource of the PDSCH on the basis that the PDCCH is transmitted on the PDCCH candidate with the aggregation level indicated by the DCI among the plurality of PDCCH candidates, so that the problem that the terminal device cannot correctly receive the PDSCH due to the understanding error of the time-frequency resource of the PDSCH can be avoided.

Description

Method for receiving and transmitting downlink data channel and communication device

Technical Field

The present application relates to the field of wireless communication, and more particularly, to a method and a communication apparatus for downlink data channel reception and transmission.

Background

In the current communication protocol, the network device may transmit a PDCCH (physical downlink control channel, PDSCH) that may schedule a Physical Downlink Shared Channel (PDSCH) to the terminal device through a PDCCH candidate (candidate) on a control resource set (core). And if the time frequency resource bearing the PDSCH is located in the time frequency resource corresponding to the CORESTE, the time frequency resource bearing the PDSCH cannot be overlapped with the time frequency resource bearing the PDCCH.

In some scenarios, the network device may send PDCCH on one PDCCH candidate (candidate), and the terminal device may decode "correctly" on another PDCCH candidate. This problem may cause the terminal device to have a wrong understanding of the time-frequency resource location of the PDCCH, thereby causing the terminal device to be unable to correctly receive the PDSCH scheduled by the PDCCH.

Disclosure of Invention

The application provides a method and a communication device for receiving and sending a downlink data channel, which can avoid the problem that the downlink data channel cannot be correctly received due to the wrong understanding of the time-frequency resource position of a downlink control channel by terminal equipment.

In a first aspect, a method for downlink data channel reception is provided, where the method includes: under the condition that terminal equipment detects a first downlink control channel meeting a first condition on one of at least two downlink control channel candidates, the terminal equipment determines that a first time-frequency resource is not overlapped with a target downlink control channel candidate; the terminal device receives the first downlink data channel on the first time-frequency resource.

The first time-frequency resource is a time-frequency resource corresponding to a first downlink data channel scheduled by the first downlink control channel, the target downlink control channel candidate is a downlink control channel candidate whose corresponding aggregation level is a target aggregation level among the at least two downlink control channel candidates, and the target aggregation level is the largest aggregation level among the corresponding aggregation levels of the at least two downlink control channel candidates, or the target aggregation level is an aggregation level indicated by an indication field in first Downlink Control Information (DCI) carried by the first downlink control channel. The at least two downlink control channel candidates can both carry a downlink control channel satisfying the first condition, and K Resource Blocks (RBs) in front of the at least two downlink control channel candidates are the same, where K is a positive integer. The first condition includes one or more of: the scrambling code is a first scrambling code, the corresponding Radio Network Temporary Identity (RNTI) is a first RNTI, the DCI carrying the first format and used for scheduling the downlink data channel, or the primary code length in the first format is a first length and the rate matching type is a first type.

In this application, the step of "the terminal device determines that the first time-frequency resource is not overlapped with the target downlink control channel candidate" may be replaced with the step of: the terminal device determines that the first time-frequency resource is a time-frequency resource except a downlink control channel candidate with the largest aggregation level corresponding to the at least two downlink control channel candidates in the time-frequency resources indicated by the first DCI.

In this application, the downlink control channel may be a control channel used to schedule a downlink data channel. Illustratively, the downlink control channel may be a PDCCH or an enhanced PDCCH (enhanced PDCCH), and the downlink data channel may be a PDSCH. The downlink control channel candidate may be, for example, a PDCCH candidate (candidate).

It will be understood by those skilled in the art that if the network device transmits the downlink control channel satisfying the first condition on the at least two downlink control channel candidates, which may result in the network device transmitting the downlink control channel satisfying the first condition on one of the at least two downlink control channel candidates, the terminal device detects the downlink control channel on the other of the at least two downlink control channel candidates.

However, according to the method of the present application, no matter which downlink control channel candidate of the at least two downlink control channel candidates the network device transmits the downlink control channel satisfying the first condition (i.e., the first downlink control channel), the network device and the terminal device determine the time-frequency resource of the downlink data channel scheduled by the first downlink control channel based on the first downlink control channel being transmitted on the downlink control channel candidate with the largest aggregation level among the at least two downlink control channel candidates, or based on the first downlink control channel being transmitted on the downlink control channel candidate with the aggregation level indicated by the first DCI indication field among the at least two downlink control channel candidates. Therefore, even if the network equipment sends the first downlink control channel on one downlink control channel candidate and the terminal equipment detects the first downlink control channel on the other downlink control channel candidate, the terminal equipment and the network equipment can understand the time-frequency resources of the downlink data channel consistently, thereby being beneficial to avoiding the problem of decoding error of the terminal equipment.

Optionally, the at least two downlink control channel candidates correspond to a same control resource set (core set), and any two downlink control channel candidates corresponding to different control resource sets do not satisfy the following condition: the first K resource blocks RB are the same and can all carry the downlink control channel that satisfies the first condition.

Based on the scheme, the problem that the network equipment sends the first downlink control channel on the downlink control channel candidate in one control resource set and the terminal equipment detects the first downlink control channel on the downlink control channel candidate in another control resource set does not occur.

Optionally, the at least two downlink control channel candidates correspond to at least two control resource sets.

For example, any two downlink control channel candidates of the at least two downlink control channel candidates may correspond to different control resource sets. Alternatively, some of the at least two downlink control channel candidates may correspond to the same control resource set, and any two of the other downlink control channel candidates may correspond to different control resource sets.

Optionally, the aggregation level corresponding to the first downlink control channel is 8, and the target aggregation level is 16.

Optionally, the first RNTI is a cell radio network temporary identity (C-RNTI), a modulation and coding scheme cell radio network temporary identity (MCS-C-RNT), or a configuration scheduled radio network temporary identity (CS-RNTI).

Optionally, the first format is one of format (format)1_2, format1_1, and format1_ 0. That is, the first DCI may be DCI format1_2, DCI format1_1, or DCI format1_ 0.

With reference to the first aspect, in certain implementations of the first aspect, the target aggregation level is an aggregation level indicated by the indication field. And, the method may further comprise: and under the condition that the terminal equipment detects a second downlink control channel on a second downlink control channel candidate, the terminal equipment determines that a second time-frequency resource is not overlapped with the second downlink control channel candidate, the second downlink control channel candidate does not belong to the at least two downlink control channel candidates, and the second time-frequency resource is a time-frequency resource corresponding to a second downlink data channel scheduled by the second downlink control channel.

Based on the scheme, when the network device sends the downlink control channels on other downlink control channel candidates except the at least two downlink control channel candidates, the problem that the network device sends the downlink control channel on one downlink control channel candidate and the terminal device detects the downlink control channel on the other downlink control channel candidate does not occur, so that the network device and the terminal device can both adopt the prior art to send and receive data.

In a second aspect, a method for downlink data channel transmission is provided, where the method includes: the network equipment sends a first downlink control channel meeting a first condition on one of at least two downlink control channel candidates, wherein the at least two downlink control channel candidates can both bear the downlink control channel meeting the first condition, the first K resource blocks RB of the at least two downlink control channel candidates are the same, K is a positive integer, the first downlink control channel bears first downlink control information DCI, and the first DCI is used for scheduling the first downlink control channel; the network device sends the first downlink data channel on a first time-frequency resource, wherein the first time-frequency resource is not overlapped with a target downlink control channel candidate, and the target downlink control channel candidate is a downlink control channel candidate with the largest aggregation level in the at least two downlink control channel candidates. The first condition includes one or more of: the scrambling code is a first scrambling code, the corresponding Radio Network Temporary Identifier (RNTI) is a first RNTI, DCI which bears a first format and is used for scheduling a downlink data channel, or the length of a mother code in the first format is a first length and the type of rate matching is a first type.

According to the method of the present application, no matter which downlink control channel candidate of the at least two downlink control channel candidates the network device transmits the downlink control channel satisfying the first condition (i.e., the first downlink control channel), the network device and the terminal device determine the time-frequency resource of the downlink data channel scheduled by the first downlink control channel based on the first downlink control channel being transmitted on the downlink control channel candidate with the largest aggregation level corresponding to the at least two downlink control channel candidates. Therefore, even if the network equipment sends the first downlink control channel on one downlink control channel candidate and the terminal equipment detects the first downlink control channel on the other downlink control channel candidate, the terminal equipment and the network equipment can understand the time-frequency resources of the downlink data channel consistently, thereby being beneficial to avoiding the problem of decoding error of the terminal equipment.

In a third aspect, a method for receiving and transmitting downlink data channels is provided, where the method includes: the network equipment sends a first downlink control channel meeting a first condition on one of at least two downlink control channel candidates, wherein the at least two downlink control channel candidates can both bear the downlink control channel meeting the first condition, and the first K resource blocks RB of the at least two downlink control channel candidates are the same, K is a positive integer, the first downlink control channel bears a first downlink control information DCI, the first DCI comprises an indication domain indicating a target aggregation level, and the first DCI is used for scheduling the first downlink control channel; the network device sends the first downlink data channel on a first time-frequency resource, wherein the first time-frequency resource is not overlapped with a target downlink control channel candidate, and the target downlink control channel candidate is a downlink control channel candidate of which the corresponding aggregation level is the target aggregation level in the at least two downlink control channel candidates. The first condition includes one or more of: the scrambling code is a first scrambling code, the corresponding Radio Network Temporary Identifier (RNTI) is a first RNTI, DCI which bears a first format and is used for scheduling a downlink data channel, or the length of a mother code in the first format is a first length and the type of rate matching is a first type.

According to the method of the present application, no matter which downlink control channel candidate of the at least two downlink control channel candidates the network device transmits the downlink control channel satisfying the first condition (i.e., the first downlink control channel), the network device and the terminal device determine the time-frequency resource of the downlink data channel scheduled by the first downlink control channel based on that the first downlink control channel is transmitted on the downlink control channel candidate of which aggregation level is indicated by the first DCI indication field among the at least two downlink control channel candidates. Therefore, even if the network equipment sends the first downlink control channel on one downlink control channel candidate and the terminal equipment detects the first downlink control channel on the other downlink control channel candidate, the terminal equipment and the network equipment can understand the time-frequency resources of the downlink data channel consistently, thereby being beneficial to avoiding the problem of decoding error of the terminal equipment.

With reference to the second aspect and the third aspect, optionally, the at least two downlink control channel candidates correspond to the same control resource set, and any two downlink control channel candidates corresponding to different control resource sets do not satisfy the following condition: the first K resource blocks RB are the same and can all carry the downlink control channel that satisfies the first condition.

With reference to the second aspect and the third aspect, optionally, the at least two downlink control channel candidates correspond to at least two control resource sets.

With reference to the second aspect and the third aspect, optionally, the aggregation level corresponding to the first downlink control channel is 8, and the target aggregation level is 16.

With reference to the second aspect and the third aspect, optionally, the first RNTI is a cell radio network temporary identifier C-RNTI, a modulation and coding strategy cell radio network temporary identifier MCS-C-RNTI, or a configuration scheduling radio network temporary identifier CS-RNTI.

With reference to the second aspect and the third aspect, optionally, the first format is one of format1_2, format1_1, and format1_ 0.

In a fourth aspect, a method for downlink data channel reception is provided, including: the terminal equipment determines at least two downlink control channel candidates, wherein the first K resource blocks RB of the at least two downlink control channel candidates are the same, K is a positive integer, and the at least two downlink control channel candidates can both bear downlink control channels meeting a first condition, and the first condition comprises one or more of the following: the scrambling code is a first scrambling code, the corresponding radio network temporary identifier RNTI is a first RNTI, downlink control information DCI which bears a first format and is used for scheduling a downlink data channel, or the length of a mother code in the first format is a first length and the type of rate matching is a first type; the terminal device detects a downlink control channel on a downlink control channel candidate other than the at least two downlink control channel candidates.

In a fifth aspect, a method for downlink data channel reception is provided, including: the network equipment determines a target downlink control channel candidate; and the network equipment transmits the downlink control channel on the target downlink control channel candidate. Wherein, the target downlink control channel candidate does not belong to at least two downlink control channel candidates, the first K resource blocks RB of the at least two downlink control channel candidates are the same, K is a positive integer, and the at least two downlink control channel candidates can both carry a downlink control channel satisfying a first condition, the first condition includes one or more of the following: the scrambling code is a first scrambling code, the corresponding RNTI is a first RNTI, downlink control information DCI which bears a first format and is used for scheduling a downlink data channel, or the length of a mother code in the first format is a first length and the type of rate matching is a first type.

It will be understood by those skilled in the art that if the network device transmits the downlink control channel on one of the at least two downlink control channel candidates, which may result in the network device transmitting the downlink control channel on one of the at least two downlink control channel candidates, the terminal device detects the downlink control channel on the other of the at least two downlink control channel candidates.

According to the method provided by the application, the network equipment is regulated not to send the downlink control channels on the at least two downlink control channel candidates, and the terminal equipment also does not detect the downlink control channels on the at least two downlink control channel candidates, so that the problem can be avoided, the terminal equipment can be prevented from understanding the time-frequency resource position of the downlink data channel wrongly, and the problem of decoding errors of the terminal equipment can be avoided.

With reference to the fourth aspect and the fifth aspect, optionally, the at least two downlink control channel candidates correspond to the same control resource set, and any two downlink control channel candidates corresponding to different control resource sets do not satisfy the following condition: the first K resource blocks RB are the same and can all carry the downlink control channel that satisfies the first condition.

With reference to the fourth aspect and the fifth aspect, optionally, the at least two downlink control channel candidates correspond to at least two control resource sets.

With reference to the fourth aspect and the fifth aspect, optionally, the first RNTI is a cell radio network temporary identifier C-RNTI, a modulation and coding strategy cell radio network temporary identifier MCS-C-RNTI, or a configuration scheduling radio network temporary identifier CS-RNTI.

With reference to the fourth aspect and the fifth aspect, optionally, the first format is one of 1_2, 1_1 and 1_ 0.

In a sixth aspect, a communication device is provided, which may comprise individual means or units for performing the method of the first aspect or any one of the possible implementations of the first aspect, or comprise individual means or units for performing the method of the fourth aspect or any one of the possible implementations of the fourth aspect.

In a seventh aspect, a communication device is provided, which may include various means or units for performing the method in any of the possible implementations of the second aspect or the second aspect, or include various means or units for performing the method in any of the possible implementations of the third aspect or the third aspect, or include various means or units for performing the method in any of the possible implementations of the fifth aspect or the fifth aspect.

In an eighth aspect, a communications apparatus is provided that includes a processor. The processor may be configured to execute the instructions involved to cause the apparatus to perform the method of any of the possible implementations of the first aspect or the first aspect described above, or to perform the method of any of the possible implementations of the fourth aspect or the fourth aspect described above. Optionally, the apparatus may further comprise a memory coupled to the processor, the memory having stored therein instructions further referred to. Optionally, the apparatus may further comprise an interface circuit, the interface circuit being coupled to the processor.

In a ninth aspect, a communications apparatus is provided that includes a processor. The processor may be configured to execute the instructions referred to cause the apparatus to perform the method of any one of the possible implementations of the second aspect or the second aspect described above, or to perform the method of any one of the possible implementations of the third aspect or the third aspect described above, or to perform the method of any one of the possible implementations of the fifth aspect or the fifth aspect described above. Optionally, the apparatus may further comprise an interface circuit, the interface circuit being coupled to the processor.

In a tenth aspect, there is provided a processor comprising: input circuit, output circuit and processing circuit. The processing circuit is configured to receive a signal through the input circuit and transmit a signal through the output circuit, so that the processor performs the method of any one of the possible implementations of the first to fifth aspects or the first to fifth aspects.

In a specific implementation process, the device or the processor may be a chip, the input circuit may be an input pin, the output circuit may be an output pin, and the processing circuit may be a transistor, a gate circuit, a flip-flop, various logic circuits, and the like. The input signal received by the input circuit may be received and input by, for example and without limitation, a receiver, the signal output by the output circuit may be output to and transmitted by a transmitter, for example and without limitation, and the input circuit and the output circuit may be the same circuit that functions as the input circuit and the output circuit, respectively, at different times. The embodiment of the present application does not limit the specific implementation manner of the processor and various circuits.

In an eleventh aspect, a processing apparatus is provided that includes a processor and a memory. The processor is configured to read instructions stored in the memory, and may receive a signal via the receiver and transmit a signal via the transmitter to perform the method of any one of the possible implementations of the first to fifth aspects or the first to fifth aspects.

In one possible design, the processor is one or more and the memory is one or more.

In one possible design, the memory may be integrated with the processor or provided separately from the processor.

In a specific implementation process, the memory may be a non-transient memory, such as a Read Only Memory (ROM), which may be integrated on the same chip as the processor, or may be separately disposed on different chips.

The processing device in the above eleventh aspect may be a chip, the processor may be implemented by hardware or may be implemented by software, and when implemented by hardware, the processor may be a logic circuit, an integrated circuit, or the like; when implemented in software, the processor may be a general-purpose processor implemented by reading software code stored in a memory, which may be integrated with the processor, located external to the processor, or stand-alone.

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 of the possible implementations of the first to fifth aspects and of the first to fifth 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 fifth aspects and the first to fifth aspects.

In a fourteenth aspect, a communication system is provided, which includes the terminal device and the network device.

Drawings

Fig. 1 is a schematic diagram of a communication system suitable for use in the present application.

Fig. 2 is a schematic diagram of time-frequency resources corresponding to CORESET.

Fig. 3 is a schematic diagram of DCI information bits corresponding to different aggregation levels.

Fig. 4 is a diagram illustrating PDCCH mapping on physical resources.

Fig. 5 is a diagram illustrating the time-frequency resource locations of two PDCCH candidates.

Fig. 6 is a schematic flow chart of a method for downlink data channel reception and transmission provided by the present application.

Fig. 7 is a schematic flow chart of another method for downlink data channel reception and transmission provided by the present application.

Fig. 8 is a schematic flow chart of a method for downlink data channel reception and transmission provided by the present application.

Fig. 9 is a schematic block diagram of a communication device provided herein.

Fig. 10 is a schematic structural diagram of a terminal device provided in the present application.

Fig. 11 is a schematic block diagram of another apparatus provided herein.

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 Long Term Evolution (LTE) system, a New Radio (NR) system in a fifth generation (5G) mobile communication system, or a future mobile communication system, etc.

A terminal device in the embodiments of the present application may refer to a User Equipment (UE), an access terminal, a subscriber unit, a subscriber station, a mobile station, a remote terminal, a mobile device, a user terminal, a wireless communication device, a user agent, or a user equipment. The terminal device may 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 5G network or a terminal device in a Public Land Mobile Network (PLMN) for future evolution, and the like, which are not limited in this embodiment.

The network device in the embodiment of the present application may be a device for communicating with a terminal device. For example, the network device may be a base station (base station), an evolved NodeB (eNodeB), a Transmission Reception Point (TRP), a next generation base station (gNB) in a 5G mobile communication system, a base station in a future mobile communication system, or an access node in a wireless fidelity (WiFi) system, and the like. For another example, the network device may also be a module or a unit that performs part of the functions of the base station, and for example, may be a Centralized Unit (CU) or a Distributed Unit (DU). For another example, the network device may also be a wireless controller, a relay station, an access point, an in-vehicle device, a wearable device, an access network device in other communication systems that evolve in the future, and the like in a Cloud Radio Access Network (CRAN) scenario. The present application does not limit the specific technology and the specific device form used by the network device.

In the embodiment of the present application, the terminal device or the network device may include 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 may include 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 may include applications such as a browser, an address book, word processing software, and instant messaging software. Furthermore, the embodiment of the present application does not particularly limit the specific structure of the execution subject of the method provided by the embodiment of the present application, as long as the execution subject can perform communication according to the method provided by the embodiment of the present application by running the program recorded with the program corresponding to the method provided by the embodiment of the present application, for example, the execution subject of the method provided by the embodiment of the present application may be a terminal device or a network device, or a functional module, such as a chip, in the terminal device or the network device.

Various storage media described herein can represent one or more devices and/or other machine-readable media for storing information. The term "computer-readable storage 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.

For better understanding of the embodiment of the present application, a brief description is given below of a possible application scenario of the embodiment of the present application with reference to fig. 1.

Fig. 1 shows a schematic diagram of a communication system suitable for use in the present application. As shown in fig. 1, the communication system 100 may include at least one network device, such as the network device 110 shown in fig. 1; the communication system 100 may also include at least one terminal device, such as the terminal device 120 shown in fig. 1. Network device 110 and terminal device 120 may communicate via a wireless link. Fig. 1 is a schematic diagram, and the communication system may further include other network devices, such as a core network device, which is not shown in fig. 1. The embodiment of the present application does not limit the number of network devices and terminal devices included in the mobile communication system. In fig. 1, the network device may send a Physical Downlink Control Channel (PDCCH) to the terminal device, and further send a Physical Downlink Shared Channel (PDSCH) scheduled by the PDCCH to the terminal device.

In NR, one PDCCH may include L ═ {1,2,4,8,16} Control Channel Elements (CCEs). Here, L is referred to as an Aggregation Level (AL) of the PDCCH.

One CCE contains 6 resource-element groups (REGs), each REG corresponding to one Resource Block (RB) on one orthogonal frequency-division multiplexing (OFDM) symbol (symbol).

One PDCCH candidate (PDCCH candidate) may include L ═ {1,2,4,8,16} CCEs, and one PDCCH candidate may or may not transmit a PDCCH. The terminal device may detect a PDCCH candidate to determine whether there is a PDCCH transmitted to itself on the PDCCH candidate.

For a search space with AL, a set of PDCCH candidates with AL may be defined. Wherein one set of search spaces (SearchSpaceSet) is a set of search spaces of a different set of ALs. One search space set corresponds to one control resource set (CORESET), but one CORESET may correspond to multiple search spaces. The terminal device may be configured with multiple CORESET.

One CORESET is contained in frequency domain

A plurality of RBs including in time domain

One OFDM symbol, for example,

according to

And

time-frequency resources corresponding to the CORESET can be determined. Also, the time-frequency resources may occur at multiple locations in time. For example, fig. 2 shows a schematic diagram of time-frequency resources corresponding to one CORESET.

The network device may send PDCCH to the terminal device through a PDCCH candidate on the CORESET, which may schedule PDSCH. And if the time frequency resource carrying the PDSCH and the related demodulation reference signal (DM-RS) are located in the time frequency resource corresponding to the CORESTE, the time frequency resource carrying the PDSCH cannot be overlapped with the time frequency resource carrying the PDCCH. In some scenarios, a network device may send a PDCCH on one PDCCH candidate (candidate) and a terminal device may decode the PDCCH correctly on another PDCCH candidate.

For example, when the information bits (bit) of the DCI take the value of [9:140], if AL8 and AL16 use the same RNTI, the mother code lengths corresponding to AL8 and AL16 are both 512, and thus 512 bits (bit) of the coded output are the same. Referring to fig. 3, 864 of the bits of the rate matching outputs of AL8 and AL16 are identical because the rate matching types are both repetition (i.e., rate matching by repeating the bits of the encoded output). If the PDCCH scrambling code is the same, then the 864-bit modulated symbols are the same. If the starting RBs of the PDCCH candidates for AL8 and AL16 are the same, then there may be several overlapping resources for both PDCCH candidates, and the modulation symbols carried on these overlapping resources may also be the same. For example, referring to fig. 4, in the core set with 1 symbol and 3 segment interleaving and REG bundling (bundle) of 2, the starting RBs of AL8 and AL16 are the same, and the modulation symbols on 8/3 CCEs are the same, that is, the PDCCH modulation symbols on the resources in the dashed-line box are the same. The line with arrows in fig. 4 corresponds to the resource for placing modulation symbols, and the direction indicated by the arrows is the mapping order for mapping the modulation symbols. For the case shown in fig. 4, it is possible for the terminal device to decode correctly with AL8 and AL16, regardless of whether the network device sent the PDCCH of AL8 or the PDCCH of AL 16.

The above problem may cause a terminal device to understand the time-frequency resource location of the PDCCH incorrectly, and further understand the time-frequency resource location of the PDSCH incorrectly, thereby causing a decoding error of the PDSCH.

For example, referring to fig. 5, in the time-frequency resource shown in fig. 5, there are two PDCCH candidates, namely PDCCH candidate 1 and PDCCH candidate 2. The PDCCH candidate 1 occupies two resource blocks 3, the PDCCH candidate 2 occupies two resource blocks 2 and two

resource blocks

3, and 4 resource blocks 4 are used for transmitting DM-RS. Resource block 2, resource block 3, and resource block 4 all belong to

resource block

1, 4 resource blocks 4, of which two resource blocks 4 belong to resource block 2 and the other two resource blocks 4 belong to resource block 3. If a PDCCH is transmitted on PDCCH candidate 1, the PDSCH is transmitted on resources other than 2 resource blocks 2 and the corresponding 2 resource blocks 4 in resource block 1. However, if the terminal device detects PDCCH on PDCCH candidate 2, it is considered that PDSCH is transmitted on other resources than 2

resource blocks

2, 2 resource blocks 3, and the corresponding 4 resource blocks 4 in resource block 1.

In order to solve the above problems, the present application provides various methods, which are described below.

It should be understood that in the present application, the downlink control channel may be a control channel used to schedule a downlink data channel. Illustratively, the downlink control channel may be a PDCCH or an enhanced PDCCH (enhanced PDCCH), and the downlink data channel may be a PDSCH. The downlink control channel candidate may be, for example, PDCCH candidate.

It should also be understood that, in the method embodiments described below, only the network device and the terminal device are taken as examples of execution subjects, and the network device may also be replaced by a chip configured in the network device, and the terminal device may also be replaced by a chip configured in the terminal device.

Fig. 6 is a schematic flow chart of a first method for receiving and transmitting a downlink data channel provided in the present application. The steps in the method 200 shown in fig. 6 are explained below.

S210, the network device sends a downlink control channel (hereinafter, referred to as a first downlink control channel) satisfying a first condition on one of the at least two downlink control channel candidates.

That is, the network device transmits the first downlink control channel on one downlink control channel candidate, which may be any one of at least two downlink control channel candidates, and the first downlink control channel satisfies the first condition.

The first K RBs of the at least two downlink control channel candidates are the same and can both carry a downlink control channel satisfying the first condition.

The K RBs before the at least two downlink control channel candidates are the same means: the starting positions of the at least two downlink control channel candidates are the same RB on the same symbol, and according to the sequence of a frequency domain first and a time domain, the sequence of the frequency domain from low to high, and the sequence of the time domain from front to back, the time frequency resources corresponding to the first K RBs in the time frequency resources corresponding to the at least two downlink control channel candidates respectively are the same, and K is a positive integer. It should be understood that the symbols may be OFDM symbols, but the present application is not limited thereto. The frequency domain from low to high can be understood as from small to large according to the RB sequence number; the time domain from front to back can be understood as from small to large according to the OFDM symbol number.

For example, referring to fig. 4, the at least two downlink control channel candidates may be time-frequency resources occupied by the PDCCH with AL being 8 and time-frequency resources occupied by the PDCCH with AL being 16 in fig. 4, and the time-frequency resources in the dashed box in the figure are the first K RBs of the at least two downlink control channel candidates.

Illustratively, K may be specified by a protocol or configured by a network device. For example, K is less than or equal to 48, but the application is not limited thereto.

The first condition may include one or more of the following:

(1) the scrambling code is a first scrambling code;

(2) the corresponding RNTI is a first RNTI;

(3) a DCI carrying a first format and used for scheduling a downlink data channel;

(4) the length of the mother code in the first format is a first length, and the rate matching type is a first type.

If the first condition includes the first item, the scrambling code of the first downlink control channel is the first scrambling code, and the at least two downlink control channel candidates can both bear the downlink control channel with the scrambling code being the first scrambling code. The downlink control channels in which the at least two downlink control channel candidates can both bear the scrambling code as the first scrambling code are also equivalent to the fact that the scrambling codes corresponding to the at least two downlink control channel candidates both include the first scrambling code.

The first scrambling code is a specific scrambling code, sometimes also referred to as a scrambling code sequence. Illustratively, the scrambling code is related to the type of the search space in which the downlink control channel candidate (or the downlink control channel) is located and the CORESET parameter corresponding to the search space. Illustratively, the scrambling code corresponding to the downlink control channel candidate in the Common Search Space (CSS) is related to the cell ID. If one CORESET is configured with the parameter pdcch-DMRS-ScramblingID, the scrambling code of the downlink control channel candidate in the UE-specific search space (USS) corresponding to the CORESET is related to the pdcch-DMRS-ScramblingID and the C-RNTI; if one CORESET is not configured with the parameter pdcch-DMRS-ScramblingID, the scrambling code of the downlink control channel candidate in the UE specific search space corresponding to the CORESET is related to the cell ID.

If the first condition includes the second term, the first downlink control channel is scrambled by the first RNTI, and the at least two downlink control channel candidates can both carry the downlink control channel scrambled by the first RNTI. The at least two downlink control channel candidates can both bear the downlink control channel scrambled by the first RNTI, which is equivalent to that the RNTIs corresponding to the at least two downlink control channel candidates both include the first RNTI. It is to be understood that one downlink control channel candidate may correspond to one or more RNTIs, and the one or more RNTIs corresponding to each of the at least two downlink control channel candidates include the first RNTI.

The first RNTI may be, for example, a C-RNTI, an MCS-C-RNTI or a CS-RNTI.

If the first condition includes the third item, the first downlink control channel carries DCI used for scheduling a downlink data channel and having a DCI format (format) of the first format, and the at least two downlink control channel candidates can both carry DCI for scheduling the downlink data channel and having the DCI format of the first format.

Hereinafter, the DCI format carried by the first downlink control channel is referred to as a first format, and the DCI for scheduling the downlink data channel is referred to as: a first DCI. And, the downlink data channel scheduled by the first DCI is denoted as: a first downlink data channel.

It should be understood that the DCI information bit number may be determined according to the DCI format. If the first condition includes the third entry, it is equivalent to that the at least two downlink control channel candidates can carry the downlink control channel with the same number of DCI information bits.

For example, the first format may be format1_0, format1_1, or format1_ 2.

If the first condition includes the fourth item, the mother code length of the first downlink control channel is the first length, the rate matching type is the first type, and the at least two downlink control channel candidates can both carry the downlink control channel whose mother code length is the first length and whose rate matching type is the first type. It should be understood that the first length refers to a mother code length when the DCI format is the first format, and the first type refers to a rate matching type when the DCI format is the first format. That is, if the DCI format of the first downlink control channel is the first format, the mother code length of the first downlink control channel is the first length, and the rate matching type is the first type. And, the at least two downlink control channels can both carry a downlink control channel with the DCI format being the first format, the mother code length being the first length, and the rate matching type being the first type.

It should be understood that the mother code length refers to the number of bits (bits) occupied by DCI information bits after Polar encoding. The rate matching type may be puncturing (puncturing), shortening (puncturing), or repetition (repetition).

It should be noted that, the first length and the first type are not specifically limited in this application, and here, it only indicates that the at least two downlink control channel candidates can all carry downlink control channels with the same mother code length and the same rate matching type, and the mother code length and the rate matching type of the first downlink control channel are the same mother code length and the same rate matching type corresponding to the at least two downlink control channel candidates. For example, the two downlink control channel candidates have the same mother code length of 512 bits and the same rate matching type of repetition, and then the first downlink control channel has the mother code length of 512 bits and the rate matching type of repetition.

Optionally, the first condition is that the scrambling code is a first scrambling code, the first DCI is carried, a length of a mother code under the first DCI is a first length, and the rate matching type is a first type.

Optionally, the AL corresponding to any two downlink control channel candidates in the at least two downlink control channel candidates is different. That is, the AL corresponding to the at least two downlink control channel candidates are different from each other.

Optionally, the at least two downlink control channel candidates correspond to the same CORESET. Moreover, any two downlink control channel candidates corresponding to different CORESET do not satisfy the following conditions: the first K RBs are the same and can bear the downlink control channel meeting the first condition.

Optionally, the at least two downlink control channel candidates correspond to at least two CORESET.

For example, assuming that the at least two downlink control channel candidates are PDCCH candidate #1, PDCCH candidate #2 and PDCCH candidate #3, the 3 PDCCH candidates may correspond to 2 CORESET or 3 CORESET. For example, PDCCH candidate #1 and PDCCH candidate #2 may correspond to CORESET #1, and PDCCH candidate #3 may correspond to CORESET # 2. Alternatively, PDCCH candidate #1, PDCCH candidate #2 and PDCCH candidate #3 correspond to CORESET #1, CORESET #2 and CORESET #3, respectively.

S220, when the terminal device detects the first downlink control channel on one of the at least two downlink control channel candidates, it is determined that the first time-frequency resource is not overlapped with the target downlink control channel candidate.

The first time-frequency resource is a time-frequency resource corresponding to a first downlink data channel scheduled by a first downlink control channel. The target downlink control channel candidate is a downlink control channel candidate whose corresponding AL is a target AL among the at least two downlink control channel candidates, and the target AL is the largest AL among the corresponding AL among the at least two downlink control channel candidates.

That is, when the terminal device detects the first downlink control channel on one of the at least two downlink control channel candidates, the terminal device determines that the first time-frequency resource does not overlap with the corresponding downlink control channel candidate with the largest AL among the at least two downlink control channel candidates, or the terminal device considers that the first downlink control channel is transmitted on the corresponding downlink control channel candidate with the largest AL among the at least two downlink control channel candidates.

For example, if the at least two downlink control channel candidates are PDCCH candidate 1 and PDCCH candidate 2 shown in fig. 5, if the terminal device detects the first downlink control channel on PDCCH candidate 1, the terminal device determines that the first time-frequency resource is not overlapped with PDCCH candidate 2 because AL corresponding to PDCCH candidate 2 is greater than AL corresponding to PDCCH candidate 1; if the terminal device detects the first downlink control channel on PDCCH candidate 2, the terminal device determines that the first time-frequency resource is not overlapped with PDCCH candidate 2.

As will be understood by those skilled in the art, the terminal device may determine the first time-frequency resource according to the time-frequency resource indicated by the first DCI and the downlink control channel candidate considered to transmit the first downlink control channel (i.e., the downlink control channel candidate with the largest AL corresponding to the at least two downlink control channel candidates). That is, the terminal device determines that the first time-frequency resource is a time-frequency resource other than the downlink control channel candidate with the largest AL corresponding to the at least two downlink control channel candidates in the time-frequency resources indicated by the first DCI.

Optionally, as an example, an AL corresponding to the downlink control channel candidate carrying the first downlink control channel is 8, and the target AL is 16.

S230, the network device transmits a first downlink data channel on the first time-frequency resource. Accordingly, the terminal device receives a first downlink data channel on the first time-frequency resource.

The network device may not be the first downlink control channel transmitted on the downlink control channel candidate with the largest AL corresponding to the at least two downlink control channel candidates, but when determining the time-frequency resource carrying the first downlink data channel, that is, the first time-frequency resource, the network device still determines the first time-frequency resource according to the time-frequency resource indicated by the first DCI and the downlink control channel candidate with the largest AL corresponding to the at least two downlink control channel candidates. Also for example in fig. 5, the network device is the first downlink control channel sent on PDCCH candidate 1, but upon determining the first time-frequency resource, the network device determines with the first downlink control channel sent on PDCCH candidate 2. That is to say, the network device determines that the first time-frequency resource is a time-frequency resource other than the downlink control channel candidate with the largest AL corresponding to the at least two downlink control channel candidates in the time-frequency resources indicated by the first DCI.

However, according to the method of the present application, no matter which downlink control channel candidate of the at least two downlink control channel candidates the network device transmits the downlink control channel satisfying the first condition (i.e., the first downlink control channel), the network device and the terminal device determine the time-frequency resource of the downlink data channel scheduled by the first downlink control channel based on that the first downlink control channel is transmitted on the downlink control channel candidate with the largest AL corresponding to the at least two downlink control channel candidates. Therefore, even if the network equipment sends the first downlink control channel on one downlink control channel candidate and the terminal equipment detects the first downlink control channel on the other downlink control channel candidate, the terminal equipment and the network equipment can understand the time-frequency resources of the downlink data channel consistently, thereby being beneficial to avoiding the problem of decoding error of the terminal equipment.

It should be understood that S220 may be before S230 or after S230, which is not limited in this application.

Fig. 7 is a schematic flow chart of a second method for downlink data channel reception and transmission provided by the present application. The steps in the method 300 shown in fig. 7 are explained below.

The network device sends a downlink control channel (hereinafter, referred to as a first downlink control channel) satisfying a first condition on one of the at least two downlink control channel candidates S310.

The first downlink control channel herein differs from the first downlink control channel in S210 in that the first DCI carried by the first downlink control channel herein includes an indication field indicating the target AL. That is, the first downlink control channel includes an indication field for indicating the target AL, and the bit occupied by the indication field is not limited in this application. Otherwise, the step is the same as S210 and is not described again.

S320, when the terminal device detects the first downlink control channel on one of the at least two downlink control channel candidates, determining that the first time-frequency resource is not overlapped with the target downlink control channel candidate.

The first time-frequency resource is a time-frequency resource corresponding to a first downlink data channel scheduled by a first downlink control channel. The target downlink control channel candidate is a downlink control channel candidate of which the corresponding AL is the target AL in the at least two downlink control channel candidates.

That is to say, when the terminal device detects the first downlink control channel on one of the at least two downlink control channel candidates, the terminal device determines that the time-frequency resource corresponding to the first downlink control channel scheduled by the first downlink control channel does not overlap with the downlink control channel candidate whose corresponding AL is the target AL in the at least two downlink control channel candidates, or that the terminal device considers that the first downlink control channel is transmitted on the downlink control channel candidate whose corresponding AL is the target AL in the at least two downlink control channel candidates.

Recording the downlink control channel candidates actually sending the first downlink control channel as: and the AL corresponding to the first downlink control channel candidate is recorded as: a first AL.

For example, the target AL may be the first AL, or may be any AL greater than the first AL in the ALs corresponding to the at least two downlink control channel candidates, or may be the largest AL in the ALs corresponding to the at least two downlink control channel candidates.

For example, if the at least two downlink control channel candidates are PDCCH candidate 1 and PDCCH candidate 2 shown in fig. 5, the target AL may be AL corresponding to PDCCH candidate 1 or AL corresponding to PDCCH candidate 2 if the network device sends the first downlink control channel in PDCCH candidate 1. If the network device sends the first downlink control channel in PDCCH candidate 2, the target AL is the AL corresponding to PDCCH candidate 2.

As can be understood by those skilled in the art, the terminal device may determine the first time-frequency resource according to the time-frequency resource indicated by the first DCI and the downlink control channel candidate whose corresponding AL is the target AL in the at least two downlink control channel candidates. That is, the terminal device determines that the first time-frequency resource is a time-frequency resource other than the downlink control channel candidate whose corresponding AL is the target AL in the at least two downlink control channel candidates in the time-frequency resources indicated by the first DCI.

Optionally, as one example, the first AL is 8 and the target AL is 16.

S330, the network device sends the first downlink data channel on the first time-frequency resource. Accordingly, the terminal device receives a first downlink data channel on the first time-frequency resource.

The network device may not be the first downlink control channel transmitted on the downlink control channel candidate whose corresponding AL is the target AL among the at least two downlink control channel candidates, but when determining the time-frequency resource carrying the first downlink data channel, that is, the first time-frequency resource, the network device still determines the first time-frequency resource according to the time-frequency resource indicated by the first DCI and the downlink control channel candidate whose corresponding AL is the target AL among the at least two downlink control channel candidates. That is to say, the network device determines that the first time-frequency resource is a time-frequency resource other than the downlink control channel candidate whose corresponding AL is the target AL in the at least two downlink control channel candidates in the time-frequency resources indicated by the first DCI.

However, according to the method of the present application, no matter which downlink control channel candidate of the at least two downlink control channel candidates the network device transmits the downlink control channel satisfying the first condition (i.e., the first downlink control channel), the network device and the terminal device determine the time-frequency resource of the downlink data channel scheduled by the first downlink control channel based on that the first downlink control channel is transmitted on the downlink control channel candidate whose AL is the aggregation level indicated by the first DCI indication field among the at least two downlink control channel candidates. Therefore, even if the network equipment sends the first downlink control channel on one downlink control channel candidate and the terminal equipment detects the first downlink control channel on the other downlink control channel candidate, the terminal equipment and the network equipment can understand the time-frequency resources of the downlink data channel consistently, thereby being beneficial to avoiding the problem of decoding error of the terminal equipment.

It should be understood that S320 may be before S330 or after S330, which is not limited in this application.

Optionally, the method may further include:

and under the condition that the terminal equipment detects the second downlink control channel on the second downlink control channel candidate, the terminal equipment determines that the second time-frequency resource is not overlapped with the second downlink control channel candidate, or the terminal equipment determines that the second time-frequency resource is the time-frequency resource except the second downlink control channel candidate in the time-frequency resources indicated by the DCI scheduled by the second downlink control channel.

The second downlink control channel candidate does not belong to the at least two downlink control channel candidates, and the second time-frequency resource is a time-frequency resource corresponding to a second downlink data channel scheduled by the second downlink control channel.

That is, if the network device sends the downlink control channel on another downlink control channel candidate except the at least two downlink control channel candidates, the terminal device determines, based on the prior art, the time-frequency resource corresponding to the downlink data channel scheduled by the downlink control channel.

It should be understood that, when the network device sends downlink control channels on other downlink control channel candidates than the at least two downlink control channel candidates, the problem that the network device sends a downlink control channel on one downlink control channel candidate and the terminal device detects the downlink control channel on the other downlink control channel candidate does not occur, and therefore both the network device and the terminal device can send and receive data by using the prior art.

Fig. 8 is a schematic flow chart of a third method for receiving and transmitting a downlink data channel provided by the present application. The method 400 shown in fig. 8 is explained below.

S410, the network equipment determines the target downlink control channel candidate.

S420, the terminal device determines at least two downlink control channel candidates.

The network device sends a downlink control channel (hereinafter referred to as a first downlink control channel) on the target downlink control channel candidate S430.

Accordingly, the terminal device detects the first downlink control channel on the downlink control channel candidates other than the at least two downlink control channel candidates S440.

Wherein the target downlink control channel candidate does not belong to the at least two downlink control channel candidates.

The first K RBs of the at least two downlink control channel candidates are the same, K is a positive integer, and the at least two downlink control channel candidates can both carry the downlink control channel satisfying the first condition, which may specifically refer to the description in the method 200.

Specifically, when transmitting any one of the downlink control channels, the network device does not transmit on the at least two downlink control channel candidates, but transmits the downlink control channel on the downlink control channel candidates other than the at least two downlink control channel candidates, and accordingly, the terminal device detects the downlink control channel on the downlink control channel candidates other than the at least two downlink control channel candidates. As described in the method 200, if the first K RBs of the at least two downlink control channel candidates are the same and both can carry the downlink control channel satisfying the first condition, the problem that the network device sends the downlink control channel satisfying the first condition on one downlink control channel candidate of the at least two downlink control channel candidates, and the terminal device detects the downlink control channel on the other downlink control channel candidates of the at least two downlink control channel candidates may result.

Optionally, the at least two downlink control channel candidates correspond to the same CORESET, and any two downlink control channel candidates corresponding to different CORESETs do not satisfy the following condition: the first K resource blocks RB are the same and can all bear the downlink control channel meeting the first condition.

It should be understood that, in the various embodiments of the present application, the size of the sequence number of each process described above does not mean the execution sequence, and the execution sequence of each process should be determined by the function and the inherent logic thereof. The various numbers or serial numbers involved in the above processes are merely used for convenience of description and should not be construed as limiting the implementation processes of the embodiments of the present application in any way.

The method provided in the embodiments of the present application is described above in detail. Hereinafter, the apparatus provided in the embodiment of the present application will be described in detail with reference to fig. 9 to 11.

Fig. 9 is a schematic block diagram of a communication device provided in an embodiment of the present application. As shown in fig. 9, the communication device 1000 may include a transceiving unit 1100 and a processing unit 1200.

The transceiver unit 1100 may be configured to receive information sent by another apparatus, and may also be configured to send information to another apparatus. For example, a downlink control channel is transmitted or a downlink control channel is received. The processing unit 1200 may be used to perform internal processing of the device.

In one possible design, the communication apparatus 1000 may correspond to a terminal device in any one of the methods 200 to 400, for example, the communication apparatus 1000 may be a terminal device or a chip configured in a terminal device. The communication apparatus 1000 may include a unit for performing an operation performed by the terminal device in the corresponding method, and each unit in the communication apparatus 1000 is respectively for implementing the operation performed by the terminal device in the method.

In one example, the communications apparatus 1000 corresponds to a terminal device in the method 200. The processing unit 1200 is configured to determine that the first time-frequency resource does not overlap with the target downlink control channel candidate when the transceiver unit 1100 detects a first downlink control channel satisfying a first condition on one of the at least two downlink control channel candidates; a transceiving unit 1100, configured to receive a first downlink data channel on a first time-frequency resource. The first time-frequency resource is a time-frequency resource corresponding to a first downlink data channel scheduled by a first downlink control channel, the target downlink control channel candidate is a downlink control channel candidate with a target aggregation level corresponding to the at least two downlink control channel candidates, and the target aggregation level is the largest aggregation level corresponding to the at least two downlink control channel candidates. The at least two downlink control channel candidates can both carry a downlink control channel satisfying the first condition, and the first K resource blocks RB of the at least two downlink control channel candidates are the same, where K is a positive integer. The first condition includes one or more of: the scrambling code is a first scrambling code, the corresponding RNTI is a first RNTI, DCI which bears a first format and is used for scheduling a downlink data channel, or the length of the mother code is a first length and the type of rate matching is a first type.

Optionally, the at least two downlink control channel candidates correspond to the same control resource set, and any two downlink control channel candidates corresponding to different control resource sets do not satisfy the following condition: the first K resource blocks RB are the same and can all bear the downlink control channel meeting the first condition.

Optionally, the first RNTI is a cell radio network temporary identifier C-RNTI, a modulation and coding strategy cell radio network temporary identifier MCS-C-RNTI, or a configuration scheduling radio network temporary identifier CS-RNTI.

Optionally, the first format is one of format1_2, format1_1, and format1_ 0.

Optionally, the target aggregation level is an aggregation level indicated by the indication field;

and, the processing unit 1200 is further configured to: when the transceiver unit 1100 detects a second downlink control channel on a second downlink control channel candidate, it is determined that a second time-frequency resource does not overlap with the second downlink control channel candidate, where the second downlink control channel candidate does not belong to the at least two downlink control channel candidates, and the second time-frequency resource is a time-frequency resource corresponding to a second downlink data channel scheduled by the second downlink control channel.

In another example, the communications apparatus 1000 corresponds to a terminal device in the method 300. The processing unit 1200 is configured to determine that the first time-frequency resource does not overlap with the target downlink control channel candidate when the transceiver unit 1100 detects a first downlink control channel satisfying a first condition on one of the at least two downlink control channel candidates; a transceiving unit 1100, configured to receive a first downlink data channel on a first time-frequency resource. The first time-frequency resource is a time-frequency resource corresponding to a first downlink data channel scheduled by a first downlink control channel, the target downlink control channel candidate is a downlink control channel candidate whose corresponding aggregation level is a target aggregation level in the at least two downlink control channel candidates, and the target aggregation level is an aggregation level indicated by an indication field in first DCI carried by the first downlink control channel. The at least two downlink control channel candidates can both carry a downlink control channel satisfying the first condition, and the first K resource blocks RB of the at least two downlink control channel candidates are the same, where K is a positive integer. The first condition includes one or more of: the scrambling code is a first scrambling code, the corresponding RNTI is a first RNTI, DCI which bears a first format and is used for scheduling a downlink data channel, or the length of the mother code is a first length and the type of rate matching is a first type.

Optionally, the first format is one of format1_2, format1_1, and format1_ 0.

In yet another example, the communications apparatus 1000 corresponds to a terminal device in the method 400. The processing unit 1200 is configured to determine at least two downlink control channel candidates, where K resource blocks RB are the same before the at least two downlink control channel candidates, K is a positive integer, and the at least two downlink control channel candidates can both carry a downlink control channel meeting a first condition, where the first condition includes one or more of the following: the scrambling code is a first scrambling code, the corresponding radio network temporary identifier RNTI is a first RNTI, downlink control information DCI which bears a first format and is used for scheduling a downlink data channel, or the length of a mother code is a first length and the type of rate matching is a first type. The transceiver unit 1100 is configured to detect a downlink control channel on a downlink control channel candidate other than the at least two downlink control channel candidates.

Optionally, any two downlink control channel candidates of the at least two downlink control channel candidates correspond to different control resource sets.

Optionally, the first format is one of 1_2, 1_1 and 1_ 0.

In one possible design, the communication apparatus 1000 may correspond to a network device in any one of the methods 200 to 400, for example, the communication apparatus 1000 may be a network device or a chip configured in a network device. The communication apparatus 1000 may include means for performing operations performed by the network device in the corresponding method, and the means in the communication apparatus 1000 are respectively for performing the operations performed by the network device in the method.

In one example, the communications apparatus 1000 corresponds to a network device in the method 200. The transceiver unit 1100 is configured to: sending a first downlink control channel meeting a first condition on one of at least two downlink control channel candidates, wherein the at least two downlink control channel candidates can both bear the downlink control channel meeting the first condition, and the first K resource blocks RB of the at least two downlink control channel candidates are the same, K is a positive integer, the first downlink control channel bears first downlink control information DCI, and the first DCI is used for scheduling the first downlink control channel; and transmitting the first downlink data channel on a first time-frequency resource, wherein the first time-frequency resource is not overlapped with a target downlink control channel candidate, and the target downlink control channel candidate is a downlink control channel candidate with the largest aggregation level in the at least two downlink control channel candidates. The first condition includes one or more of: the scrambling code is a first scrambling code, the corresponding radio network temporary identifier RNTI is a first RNTI, DCI which bears a first format and is used for scheduling a downlink data channel, or the length of a mother code is a first length and the type of rate matching is a first type.

Optionally, the first format is one of format1_2, format1_1, and format1_ 0.

In one example, the communications apparatus 1000 corresponds to a network device in the method 300. The transceiver unit 1100 is configured to: sending a first downlink control channel meeting a first condition on one of at least two downlink control channel candidates, wherein the at least two downlink control channel candidates can both bear the downlink control channel meeting the first condition, and the first K resource blocks RB of the at least two downlink control channel candidates are the same, K is a positive integer, the first downlink control channel bears first downlink control information DCI, the first DCI comprises an indication field indicating a target aggregation level, and the first DCI is used for scheduling the first downlink control channel; and transmitting the first downlink data channel on a first time-frequency resource, wherein the first time-frequency resource is not overlapped with a target downlink control channel candidate, and the target downlink control channel candidate is a downlink control channel candidate of which the corresponding aggregation level is the target aggregation level in the at least two downlink control channel candidates. The first condition includes one or more of: the scrambling code is a first scrambling code, the corresponding radio network temporary identifier RNTI is a first RNTI, DCI which bears a first format and is used for scheduling a downlink data channel, or the length of a mother code is a first length and the type of rate matching is a first type.

Optionally, the first format is one of format1_2, format1_1, and format1_ 0.

In one example, the communications apparatus 1000 corresponds to a network device in the method 400. Wherein, the processing unit 1200 is configured to: determining a target downlink control channel candidate; the transceiving unit 1100 is configured to send a downlink control channel on the target downlink control channel candidate. Wherein the target downlink control channel candidate does not belong to at least two downlink control channel candidates, the first K resource blocks RB of the at least two downlink control channel candidates are the same, K is a positive integer, and the at least two downlink control channel candidates can both carry a downlink control channel satisfying a first condition, the first condition includes one or more of: the scrambling code is a first scrambling code, the corresponding RNTI is a first RNTI, downlink control information DCI which bears a first format and is used for scheduling a downlink data channel, or the length of the mother code is a first length and the type of rate matching is a first type. Optionally, the at least two downlink control channel candidates correspond to the same control resource set, and any two downlink control channel candidates corresponding to different control resource sets do not satisfy the following condition: the first K resource blocks RB are the same and can all bear the downlink control channel meeting the first condition.

Optionally, the first format is one of 1_2, 1_1 and 1_ 0.

For example, the operations performed by the processing unit 1200 may also be performed by the transceiving unit 1100.

It should be understood that the specific processes of the units for executing the corresponding steps are already described in detail in the above method embodiments, and therefore, for brevity, detailed descriptions thereof are omitted.

It is further understood that when the communication apparatus 1000 is a terminal device, the transceiver unit 1100 in the communication apparatus 1000 may correspond to the transceiver 2020 in the terminal device 2000 shown in fig. 10, and the processing unit 1200 in the communication apparatus 1000 may correspond to the processor 2010 in the terminal device 2000 shown in fig. 10.

It should also be understood that when the communication device 1000 is a chip configured in a terminal device, the transceiver unit 1200 in the communication device 1000 may be an input/output interface.

It should also be understood that when the communication apparatus 1000 is a network device, the transceiver unit 1100 in the communication apparatus 1000 may correspond to the RRU 3100 in the network device 3000 shown in fig. 11, and the processing unit 1200 in the communication apparatus 1000 may correspond to the BBU 3200 in the network device 3000 shown in fig. 11.

It should also be understood that when the communication device 1000 is a chip configured in a network device, the transceiver unit 1100 in the communication device 1000 may be an input/output interface.

Fig. 10 is a schematic structural diagram of a terminal device 2000 according to an embodiment of the present application. The terminal device 2000 can be applied to the system shown in fig. 1, and performs the functions of the terminal device in the above method embodiment. As shown in fig. 10, the terminal device 2000 includes a processor 2010 and a transceiver 2020. Optionally, the terminal device 2000 further comprises a memory 2030. The processor 2010, the transceiver 2002 and the memory 2030 are in communication with each other through an internal connection path to transmit control or data signals, the memory 2030 is used for storing a computer program, and the processor 2010 is used for calling the computer program from the memory 2030 and executing the computer program to control the transceiver 2020 to transmit and receive signals. Optionally, the terminal device 2000 may further include an antenna 2040, configured to transmit uplink data or uplink control signaling output by the transceiver 2020 by using a wireless signal.

The processor 2010 and the memory 2030 may be combined into a processing device, and the processor 2010 is configured to execute the program codes stored in the memory 2030 to achieve the above functions. In particular, the memory 2030 may be integrated with the processor 2010 or may be separate from the processor 2010. The processor 2010 may correspond to the processing unit 1200 in fig. 9.

The transceiver 2020 may correspond to the transceiver unit 1100 of fig. 9. The transceiver 2020 may include a receiver (or receiver, receiving circuit) and a transmitter (or transmitter, transmitting circuit). Wherein the receiver is used for receiving signals, and the transmitter is used for transmitting signals.

It should be understood that terminal device 2000 shown in fig. 10 is capable of implementing various processes involving the terminal device in any one of methods 200-500. The operations or functions of the modules in the terminal device 2000 are respectively for implementing the corresponding flows in the corresponding method embodiments. Reference may be made specifically to the description of the above method embodiments, and a detailed description is appropriately omitted herein to avoid redundancy.

The processor 2010 may be configured to perform the actions described in the preceding method embodiments that are implemented within the terminal device, and the transceiver 2020 may be configured to perform the actions described in the preceding method embodiments that the terminal device transmits to or receives from the network device. Please refer to the description of the previous embodiment of the method, which is not repeated herein.

Optionally, the terminal device 2000 may further include a power supply 2050 for supplying power to various devices or circuits in the terminal device.

In addition, in order to further improve the functions of the terminal device, the terminal device 2000 may further include one or more of an input unit 2060, a display unit 2070, an audio circuit 2080, a camera 2090, a sensor 2100, and the like, and the audio circuit may further include a speaker 2082, a microphone 2084, and the like.

Fig. 11 is a schematic structural diagram of a network device provided in an embodiment of the present application, which may be a schematic structural diagram of a base station, for example. The base station 3000 can be applied to the system shown in fig. 1, and performs the functions of the network device in the above method embodiment. As shown, the base station 3000 may include one or more radio frequency units, such as a Remote Radio Unit (RRU) 3100 and one or more baseband units (BBUs) (which may also be referred to as Distributed Units (DUs)) 3200. The RRU 3100 may be referred to as a transceiver unit or a communication unit, and corresponds to the transceiver unit 1100 in fig. 9. Alternatively, the transceiving unit 3100 may also be referred to as a transceiver, transceiving circuit, or transceiver, etc., which may comprise at least one antenna 3101 and a radio frequency unit 3102. Alternatively, the transceiving unit 3100 may include a receiving unit and a transmitting unit, the receiving unit may correspond to a receiver (or receiver, receiving circuit), and the transmitting unit may correspond to a transmitter (or transmitter, transmitting circuit). The RRU 3100 part is mainly used for transceiving radio frequency signals and converting radio frequency signals to baseband signals. The BBU 3200 section is mainly used for performing baseband processing, controlling a base station, and the like. The RRU 3100 and the BBU 3200 may be physically disposed together or may be physically disposed separately, i.e. distributed base stations.

The BBU 3200 is a control center of the base station, and may also be referred to as a processing unit, and may correspond to the processing unit 1200 in fig. 9, and is mainly used for completing baseband processing functions, such as channel coding, multiplexing, modulating, spreading, and the like. For example, the BBU (processing unit) can be used to control the base station to execute the operation flow related to the network device in the above method embodiment.

In an example, the BBU 3200 may be formed by one or more boards, and the boards may collectively support a radio access network of a single access system (e.g., an LTE network), or may respectively support radio access networks of different access systems (e.g., an LTE network, a 5G network, or other networks). The BBU 3200 also includes a memory 3201 and a processor 3202. The memory 3201 is used to store necessary instructions and data. The processor 3202 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 first access network device in the above method embodiment. The memory 3201 and processor 3202 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.

It should be understood that the base station 3000 shown in fig. 11 can implement the respective processes of the network device involved in the foregoing method embodiments. The operations or functions of the modules in the base station 3000 are respectively to implement the corresponding flows in the above method embodiments. Reference may be made specifically to the description of the above method embodiments, and a detailed description is appropriately omitted herein to avoid redundancy.

BBU 3200 as described above can be used to perform actions described in previous method embodiments as being implemented internally by a network device, while RRU 3100 can be used to perform actions described in previous method embodiments as being sent by or received from a terminal device by a network device. Please refer to the description of the previous embodiment of the method, which is not repeated herein.

According to the method provided by the embodiment of the present application, the present application further provides a computer program product, which includes: computer program code which, when run on a computer, causes the computer to perform the method of the preceding method embodiment on the terminal device side or on the network device side.

According to the method provided by the embodiment of the present application, the present application further provides a computer-readable medium, which stores a program code, and when the program code runs on a computer, the computer is caused to execute the method on the terminal device side or the network device side in the foregoing method embodiment.

According to the method provided by the embodiment of the present application, the present application further provides a system, which includes the foregoing network device and terminal device.

The embodiment of the application also provides a processing device, which comprises a processor and an interface; the processor is configured to perform the method in the above-described method embodiment.

It should be understood that the processing means may be a chip. For example, the processing device may be a Field Programmable Gate Array (FPGA), a general purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, a system on chip (SoC), a Central Processing Unit (CPU), a Network Processor (NP), a digital signal processing circuit (DSP), a microcontroller (micro controller unit, MCU), a Programmable Logic Device (PLD) or other integrated chip. The various methods, steps, and logic blocks disclosed in the embodiments of the present application may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in a memory, and a processor reads information in the memory and completes the steps of the method in combination with hardware of the processor.

It will 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 RAM are available, such as Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), Synchronous Dynamic Random Access Memory (SDRAM), double data rate SDRAM, enhanced SDRAM, SLDRAM, Synchronous Link DRAM (SLDRAM), and direct rambus RAM (DR RAM). It should be noted that the memory of the systems and methods described herein is intended to comprise, without being limited to, these and any other suitable types of memory.

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

The network device in the foregoing device embodiments completely corresponds to the terminal device and the network device or the terminal device in the method embodiments, and the corresponding module or unit executes the corresponding steps, for example, the communication unit (transceiver) executes the steps of receiving or transmitting in the method embodiments, and other steps besides transmitting and receiving may be executed by the processing unit (processor). The functions of the specific elements may be referred to in the respective method embodiments. The number of the processors may be one or more.

As used in this specification, the terms "component," "module," "system," and the like are intended to refer to a computer-related entity, either hardware, firmware, a combination of hardware and software, or software in execution. For example, a component may be, but is not limited to being, a process running on a processor, an object, an executable, a thread of execution, a program, or a computer. By way of illustration, both an application running on a computing device and the computing device can be a component. One or more components may reside within a process or thread of execution and a component may be localized on one computer and distributed between 2 or more computers. In addition, these components can execute from various computer readable media having various data structures stored thereon. The components may communicate by way of local or remote processes such as in accordance with a signal having one or more data packets (e.g., data from two components interacting with another component in a local system, distributed system, or across a network such as the internet with other systems by way of the signal).

It should be appreciated that reference throughout this specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present application. Thus, the various embodiments are not necessarily referring to the same embodiment throughout the specification. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

It should be understood that, in the embodiment of the present application, the numbers "first" and "second" … are only used for distinguishing different objects, such as for distinguishing different network devices, and do not limit the scope of the embodiment of the present application, and the embodiment of the present application is not limited thereto.

It should also be understood that, in this application, "when …", "if" and "if" all refer to a network element that performs the corresponding process under certain objective circumstances, and are not time-critical, nor do they require certain deterministic actions to be performed by the network element, nor do they imply that other limitations exist.

It is also understood that, in the present application, "at least one" means one or more, "a plurality" means two or more.

It should also be understood that in the embodiments of the present application, "B corresponding to a" means that B is associated with a, from which B can be determined. It should also be understood that determining B from a does not mean determining B from a alone, but may be determined from a and/or other information.

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

Items appearing in this application as similar to "include one or more of the following: the meaning of the expressions A, B, and C "generally means that the item may be any of the following, unless otherwise specified: a; b; c; a and B; a and C; b and C; a, B and C; a and A; a, A and A; a, A and B; a, A and C, A, B and B; a, C and C; b and B, B, B and C, C and C; c, C and C, and other combinations of A, B and C. The above description is made by taking 3 elements of a, B and C as examples of optional items of the item, and when the expression "item" includes at least one of the following: a, B, … …, and X ", i.e., more elements in the expression, then the items to which the item may apply may also be obtained according to the aforementioned rules.

It is understood that, in the embodiments of the present application, a terminal device and/or a network device may perform some or all of the steps in the embodiments of the present application, and these steps or operations are merely examples, and the embodiments of the present application may also perform other operations or various modifications of the operations. Further, the various steps may be performed in a different order presented in the embodiments of the application, and not all operations in the embodiments of the application may be performed.

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.

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.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a U disk, a removable hard disk, a read-only memory ROM, a random access memory RAM, a magnetic disk, or an optical disk.

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

Claims

1. A method for downlink data channel reception, comprising:

in case that a terminal device detects a first downlink control channel satisfying a first condition on one of at least two downlink control channel candidates, the terminal device determines that a first time-frequency resource does not overlap with a target downlink control channel candidate,

the first time-frequency resource is a time-frequency resource corresponding to a first downlink data channel scheduled by the first downlink control channel, the target downlink control channel candidate is a downlink control channel candidate whose corresponding aggregation level is a target aggregation level among the at least two downlink control channel candidates, and the target aggregation level is the maximum aggregation level among the corresponding aggregation levels among the at least two downlink control channel candidates, or the target aggregation level is an aggregation level indicated by an indication field in first downlink control information DCI carried by the first downlink control channel;

the terminal equipment receives the first downlink data channel on the first time-frequency resource;

wherein the at least two downlink control channel candidates can both carry downlink control channels satisfying the first condition, and the first K resource blocks RB of the at least two downlink control channel candidates are the same, K is a positive integer,

the first condition includes one or more of: the scrambling code is a first scrambling code, the corresponding radio network temporary identifier RNTI is a first RNTI, DCI which bears a first format and is used for scheduling a downlink data channel, or the length of a mother code in the first format is a first length and the type of rate matching is a first type.

2. The method of claim 1, wherein the at least two downlink control channel candidates correspond to a same control resource set, and any two downlink control channel candidates corresponding to different control resource sets do not satisfy the following condition: the first K resource blocks RB are the same and can all bear the downlink control channel meeting the first condition.

3. The method of claim 1, wherein the at least two downlink control channel candidates correspond to at least two sets of control resources.

4. The method of any one of claims 1 to 3, wherein the first downlink control channel corresponds to an aggregation level of 8 and the target aggregation level is 16.

5. The method according to any of claims 1 to 4, wherein the first RNTI is a cell radio network temporary identity C-RNTI, a modulation coding strategy cell radio network temporary identity MCS-C-RNTI or a configuration scheduling radio network temporary identity CS-RNTI.

6. The method of any of claims 1 to 5, wherein the first format is one of format1_2, format1_1, and format1_ 0.

7. The method of any of claims 1 to 6, wherein the target aggregation level is the aggregation level indicated by the indication field;

and, the method further comprises:

and under the condition that the terminal equipment detects a second downlink control channel on a second downlink control channel candidate, the terminal equipment determines that a second time-frequency resource is not overlapped with the second downlink control channel candidate, the second downlink control channel candidate does not belong to the at least two downlink control channel candidates, and the second time-frequency resource is a time-frequency resource corresponding to a second downlink data channel scheduled by the second downlink control channel.

8. A method for downlink data channel transmission, comprising:

the network equipment sends a first downlink control channel meeting a first condition on one of at least two downlink control channel candidates, wherein the at least two downlink control channel candidates can both bear the downlink control channel meeting the first condition, the first K resource blocks RB of the at least two downlink control channel candidates are the same, K is a positive integer, the first downlink control channel bears first downlink control information DCI, and the first DCI is used for scheduling the first downlink control channel;

the network device sends the first downlink data channel on a first time-frequency resource, wherein the first time-frequency resource is not overlapped with a target downlink control channel candidate, and the target downlink control channel candidate is a downlink control channel candidate with the largest aggregation level in the at least two downlink control channel candidates;

9. A method for downlink data channel transmission, comprising:

the network equipment sends a first downlink control channel meeting a first condition on one of at least two downlink control channel candidates, wherein the at least two downlink control channel candidates can both bear the downlink control channel meeting the first condition, and the first K resource blocks RB of the at least two downlink control channel candidates are the same, K is a positive integer, the first downlink control channel bears first downlink control information DCI, the first DCI comprises an indication domain indicating a target aggregation level, and the first DCI is used for scheduling the first downlink control channel;

the network device sends the first downlink data channel on a first time-frequency resource, wherein the first time-frequency resource is not overlapped with a target downlink control channel candidate, and the target downlink control channel candidate is a downlink control channel candidate of which the corresponding aggregation level is the target aggregation level in the at least two downlink control channel candidates;

10. The method of claim 8 or 9, wherein the at least two downlink control channel candidates correspond to a same control resource set, and any two downlink control channel candidates corresponding to different control resource sets do not satisfy the following condition:

the first K resource blocks RB are the same and can all bear the downlink control channel meeting the first condition.

11. The method of claim 8 or 9, wherein the at least two downlink control channel candidates correspond to at least two sets of control resources.

12. The method of any one of claims 8 to 11, wherein the first downlink control channel corresponds to an aggregation level of 8 and the target aggregation level is 16.

13. The method according to any of claims 8 to 12, wherein the first RNTI is a cell radio network temporary identity, C-RNTI, a modulation coding strategy cell radio network temporary identity, MCS-C-RNTI, or a configured scheduling radio network temporary identity, CS-RNTI.

14. The method of any one of claims 8 to 13, wherein the first format is one of format1_2, format1_1, and format1_ 0.

15. A method for downlink data channel reception, comprising:

the terminal equipment determines at least two downlink control channel candidates, wherein the first K resource blocks RB of the at least two downlink control channel candidates are the same, K is a positive integer, and the at least two downlink control channel candidates can bear downlink control channels meeting a first condition, and the first condition comprises one or more of the following: the scrambling code is a first scrambling code, the corresponding radio network temporary identifier RNTI is a first RNTI, downlink control information DCI which bears a first format and is used for scheduling a downlink data channel, or the length of a mother code in the first format is a first length and the type of rate matching is a first type;

and the terminal equipment detects the downlink control channel on the downlink control channel candidates except the at least two downlink control channel candidates.

16. The method of claim 15, wherein the at least two downlink control channel candidates correspond to a same control resource set, and any two downlink control channel candidates corresponding to different control resource sets do not satisfy the following condition: the first K resource blocks RB are the same and can all bear the downlink control channel meeting the first condition.

17. The method of claim 15, wherein the at least two downlink control channel candidates correspond to at least two sets of control resources.

18. The method according to any of claims 15 to 17, wherein the first RNTI is a cell radio network temporary identity, C-RNTI, a modulation coding strategy cell radio network temporary identity, MCS-C-RNTI, or a configured scheduling radio network temporary identity, CS-RNTI.

19. The method of any of claims 15 to 18, wherein the first format is one of 1_2, format1_1, and format1_ 0.

20. A method for downlink data channel transmission, comprising:

the network equipment determines a target downlink control channel candidate;

the network equipment sends a downlink control channel on the target downlink control channel candidate;

wherein the target downlink control channel candidate does not belong to at least two downlink control channel candidates, the first K resource blocks RB of the at least two downlink control channel candidates are the same, K is a positive integer, and the at least two downlink control channel candidates can both carry a downlink control channel satisfying a first condition, the first condition includes one or more of: the scrambling code is a first scrambling code, the corresponding RNTI is a first RNTI, downlink control information DCI which bears a first format and is used for scheduling a downlink data channel, or the length of a mother code in the first format is a first length and the type of rate matching is a first type.

21. The method of claim 20, wherein the at least two downlink control channel candidates correspond to a same control resource set, and any two downlink control channel candidates corresponding to different control resource sets do not satisfy the following condition: the first K resource blocks RB are the same and can all bear the downlink control channel meeting the first condition.

22. The method of claim 20, wherein the at least two downlink control channel candidates correspond to at least two sets of control resources.

23. The method according to any of claims 20 to 22, wherein the first RNTI is a cell radio network temporary identity, C-RNTI, a modulation coding strategy cell radio network temporary identity, MCS-C-RNTI, or a configured scheduling radio network temporary identity, CS-RNTI.

24. The method of any of claims 20 to 23, wherein the first format is one of 1_2, format1_1, and format1_ 0.

25. A communications apparatus, characterized in that the apparatus is configured to perform the method according to any one of claims 1 to 7 or 15 to 19.

26. A communications apparatus, characterized in that the apparatus is configured to perform the method according to any of claims 8 to 14 or 20 to 24.

27. A communications apparatus, comprising: a processor coupled with a memory, the memory to store a program or instructions that, when executed by the processor, cause the apparatus to perform the method of any of claims 1 to 24.

28. A readable storage medium having stored thereon a computer program or instructions, which when executed cause a computer to perform the method of any one of claims 1 to 24.

29. A computer program product comprising computer program instructions that cause a computer to perform: the method of any one of claims 1 to 24.