WO2020155182A1

WO2020155182A1 - Method and device for channel transmission

Info

Publication number: WO2020155182A1
Application number: PCT/CN2019/074708
Authority: WO
Inventors: 贺传峰; 吴作敏; 石聪
Original assignee: Oppo广东移动通信有限公司
Priority date: 2019-02-03
Filing date: 2019-02-03
Publication date: 2020-08-06
Also published as: CN111819898A; CN111819898B

Abstract

Disclosed is a method for channel transmission, capable of ensuring, in a case where a resource conflict is found between a search space and a signal or another search space, the effective transmission of a channel and the signal. The method comprises: acquiring a first search space preset as applicable in transmitting a first downlink control channel; acquiring a second search space actually applicable in transmitting the first downlink channel, the second search space being arranged after the first search space; and determining, on the basis of distribution of target resources applicable in transmitting a second control channel or a specific signal in the first search space and/or the distribution of the target resources in the second search space, a resource applicable in transmitting the first downlink control channel in the second search space, where the target resource applicable in transmitting the second control channel belongs to a third search space.

Description

Method and equipment for channel transmission

Technical field

The embodiments of the present application relate to the field of communications, and more specifically, to a method and device for channel transmission.

Background technique

In the 5G system or New Radio (NR) system, data transmission on unlicensed spectrum (unlicensed spectrum) is supported. When a communication device performs NR-based access to unlicensed spectrum (NR-U) communication on an unlicensed frequency band, it needs to be based on the principle of Listen Before Talk (LBT). That is, before sending a signal on an unlicensed frequency band, you need to perform channel listening first, and only when the listening result is that the channel is idle, can the signal be sent; if the result of channel listening on the unlicensed frequency band is channel occupation, The signal cannot be sent.

Due to the uncertainty of obtaining channel usage rights on unlicensed frequency bands, the PDCCH may not be transmitted at the location where the Physical Downlink Control Channel (PDCCH) should be transmitted, but the PDCCH is transmitted at other time domain locations. This may cause resource conflicts between the PDCCH and the channel state information reference signal (Channel State Information-Reference Signal, CSI-RS), which affects the channel and signal transmission performance.

Summary of the invention

The embodiments of the present application provide a method and device for channel transmission, which can ensure effective transmission of channels and signals even when resources conflict between a search space and a signal or with other search spaces.

In a first aspect, a method for channel transmission is provided, including: acquiring a preset first search space that can be used to transmit a first control channel; acquiring a second search space that can actually be used to transmit the first control channel, so The second search space is located after the first search space; according to the distribution of target resources that can be used to transmit a second control channel or a specific signal in the first search space, and/or the target resource is The distribution in the second search space determines the resources that can be used to transmit the first downlink control channel in the second search space, where the target resources that can be used to transmit the second control channel belong to The third search space.

In a second aspect, a communication device is provided, and the communication device can execute the foregoing first aspect or the method in any optional implementation of the first aspect. Specifically, the terminal device may include a functional module for executing the foregoing first aspect or any possible implementation of the first aspect.

In a third aspect, a communication device is provided, including a processor and a memory. The memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory to execute the above-mentioned first aspect or the method in any possible implementation of the first aspect.

In a fourth aspect, a chip is provided for implementing the foregoing first aspect or any possible implementation of the first aspect. Specifically, the chip includes a processor, configured to call and run a computer program from the memory, so that the device installed with the chip executes the method in the first aspect or any possible implementation of the first aspect.

In a fifth aspect, a computer-readable storage medium is provided for storing a computer program that enables a computer to execute the above-mentioned first aspect or the method in any possible implementation of the first aspect.

In a sixth aspect, a computer program product is provided, including computer program instructions that cause a computer to execute the above-mentioned first aspect or any possible implementation of the first aspect.

In a seventh aspect, a computer program is provided, which when running on a computer, causes the computer to execute the method in the first aspect or any possible implementation of the first aspect.

In an eighth aspect, a communication system is provided, including a communication device, wherein the communication device is configured to: obtain a preset first search space that can be used to transmit the first control channel; The second search space of the channel, the second search space is located after the first search space; according to the distribution of target resources that can be used to transmit the second control channel or specific signal in the first search space, and /Or, the distribution of the target resource in the second search space determines the resources that can be used to transmit the first downlink control channel in the second search space, where the resources can be used to transmit the The target resource of the second control channel belongs to the third search space.

Based on the above technical solution, in the unlicensed frequency band, when the preset first search space that can be used to transmit the first control channel and the second search space that can actually be used to transmit the first control channel, the time domain position At different times, the network equipment and the terminal equipment send and receive signals according to the resource occupation of other channels or signals in the first search space, and/or the resource occupation of other channels or signals in the second search space, so that In the case of resource conflicts between the search space and the signal or with other search spaces, the effective transmission of the channel and signal is still guaranteed.

Description of the drawings

Fig. 1 is a schematic diagram of a possible wireless communication system applied by an embodiment of the present application.

Figure 2 is a schematic diagram of the search space in the case of LTB.

Figure 3 is a schematic diagram of a CSI-RS pattern.

Figure 4 is a schematic diagram of no resource overlap between CSI-RS and control channel.

Figure 5 is a schematic diagram of resource overlap between CSI-RS and control channel.

FIG. 6 is a schematic flowchart of a channel transmission method according to an embodiment of the present application.

Fig. 7(a), Fig. 7(b) and Fig. 7(c) are schematic diagrams of transmission when the CSI-RS and the control channel in an embodiment of the present application overlap.

Fig. 8(a), Fig. 8(b) and Fig. 8(c) are schematic diagrams of transmission when the CSI-RS and the control channel in an embodiment of the present application overlap.

Figures 9(a), 9(b), 9(c), 9(d) and 9(e) are schematic diagrams of transmission when the CSI-RS and the control channel in an embodiment of the present application overlap.

FIG. 10 is a schematic block diagram of a communication device according to an embodiment of the present application.

FIG. 11 is a schematic structural diagram of a communication device according to an embodiment of the present application.

FIG. 12 is a schematic structural diagram of a chip of an embodiment of the present application.

FIG. 13 is a schematic block diagram of a communication system according to an embodiment of the present application.

detailed description

The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings of the embodiments of the present application.

The technical solutions of the embodiments of this application can be applied to various communication systems, for example: Global System of Mobile Communication (GSM) system, Code Division Multiple Access (CDMA) system, and Wideband Code Division Multiple Access (Wideband Code Division Multiple Access, WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, LTE Frequency Division Duplex (FDD) system, LTE Time Division Duplex (TDD) system, Advanced long term evolution (LTE-A) system, New Radio (NR) system, NR system evolution system, LTE on unlicensed frequency bands (LTE-based access to unlicensed spectrum, LTE-U) system, NR (NR-based access to unlicensed spectrum, NR-U) system on unlicensed frequency bands, Universal Mobile Telecommunication System (UMTS), global Worldwide Interoperability for Microwave Access (WiMAX) communication systems, Wireless Local Area Networks (WLAN), Wireless Fidelity (WiFi), next-generation communication systems or other communication systems, etc.

Generally speaking, traditional communication systems support a limited number of connections and are easy to implement. However, with the development of communication technology, mobile communication systems will not only support traditional communication, but also support, for example, Device to Device (Device to Device, D2D) communication, machine to machine (Machine to Machine, M2M) communication, machine type communication (MTC), and vehicle to vehicle (V2V) communication, etc. The embodiments of this application can also be applied to these communications system.

Optionally, the communication system in the embodiment of the present application may be applied to scenarios such as carrier aggregation (CA), dual connectivity (DC), and standalone (SA) networking.

Exemplarily, the communication system 100 applied in the embodiment of the present application is shown in FIG. 1. The wireless communication system 100 may include a network device 110. The network device 110 may be a device that communicates with terminal devices. The network device 110 may provide communication coverage for a specific geographic area, and may communicate with terminal devices located in the coverage area. Optionally, the network device 100 may be a base station (Base Transceiver Station, BTS) in a GSM system or a CDMA system, a base station (NodeB, NB) in a WCDMA system, or an evolved base station in an LTE system (Evolutional Node B, eNB or eNodeB), or the network side device in the NR system, or the wireless controller in the Cloud Radio Access Network (CRAN), or the network device can be a relay station or Entry points, in-vehicle devices, wearable devices, network-side devices in next-generation networks, or network devices in the future evolution of the Public Land Mobile Network (PLMN), etc.

The wireless communication system 100 further includes at least one terminal device 120 located within the coverage area of the network device 110. The terminal device 120 may be mobile or fixed. Optionally, the terminal device 120 may refer to an access terminal, user equipment (User Equipment, UE), user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile equipment, user terminal, terminal, wireless communication Device, user agent or user device. The access terminal can be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a wireless local loop (Wireless Local Loop, WLL) station, a personal digital processing (Personal Digital Assistant, PDA), with wireless communication Functional handheld devices, computing devices or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, terminal devices in the future 5G network or terminal devices in the future evolved PLMN, etc. Wherein, optionally, direct terminal (Device to Device, D2D) communication may also be performed between the terminal devices 120.

The network device 110 may provide services for a cell, and the terminal device 120 communicates with the network device 110 through transmission resources (for example, frequency domain resources, or spectrum resources) used by the cell, and the cell may be the network device 110 (for example, a base station) The corresponding cell, the cell can belong to a macro base station or a base station corresponding to a small cell (Small cell). The small cell here may include, for example, a metro cell (Metro cell), a micro cell (Micro cell), and a pico cell (Pico cell). Femto cells, etc. These small cells have the characteristics of small coverage and low transmit power, and are suitable for providing high-rate data transmission services.

Figure 1 exemplarily shows one network device and two terminal devices. Optionally, the wireless communication system 100 may include multiple network devices and the coverage of each network device may include other numbers of terminal devices. The application embodiment does not limit this. In addition, the wireless communication system 100 may also include other network entities such as a network controller and a mobility management entity, which are not limited in the embodiment of the present application.

In the NR system, data transmission on unlicensed frequency bands (or called unlicensed spectrum) is supported. The unlicensed spectrum is the spectrum that can be used for radio equipment communication divided by the country and region. This spectrum is usually considered to be a shared spectrum, that is, the communication equipment in different communication systems can meet the regulatory requirements set by the country or region on the spectrum. To use this spectrum, there is no need to apply for a proprietary spectrum authorization from the government. In order to allow various communication systems that use unlicensed spectrum for wireless communication to coexist friendly on this spectrum, some countries or regions have stipulated the legal requirements that must be met when using unlicensed spectrum. For example, in Europe and other regions, communication equipment follows the principle of "listen first, then speak", that is, communication equipment needs to perform channel listening before sending signals on channels of unlicensed spectrum, only when the result of channel listening is that the channel is free Only when the communication device can perform signal transmission; if the communication device performs channel sensing on the unlicensed spectrum and the result is that the channel is busy, the communication device cannot perform signal transmission.

Compared with the data transmission on the licensed spectrum, the data transmission on the unlicensed spectrum has uncertainty.

In the NR system, the physical downlink shared channel (Physical Downlink Shared Channel, PDSCH) resource allocation in the time domain mainly has two types: TypeA and TypeB. As shown in Table 1, for the normal cyclic prefix (Normal Cyclic Prefix, Normal CP), the starting symbol S of the PDSCH with Type A can be {0, 1, 2, 3}, and the length L of the PDSCH can be the number of symbols {3, 4,..., 14}. The starting symbol S of the PDSCH using Type B can be {0, 1, ..., 12}, and the length L of the PDSCH can be the number of symbols {2, 4, 7}. The scheduling mode of PDSCH using Type A can be understood as a slot-based scheduling mode, because only one PDSCH can be transmitted in a slot. The scheduling mode of PDSCH using Type B can be understood as a scheduling mode based on mini-slots, because multiple PDSCHs can be transmitted in one slot.

Table I

When the network device schedules the downlink data transmission of the terminal device, it will carry a Time Domain Resource Allocation (TDRA) field in the downlink control information (Download Control Information, DCI). The TDRA field is 4 bits. , Can indicate 16 different rows in the resource allocation table, where each row corresponds to a resource allocation group. Each resource allocation group may include, for example, the starting position S of the PDSCH, the length L of the PDSCH, and the mapping type (mapping Type) refers to the aforementioned Type A and Type B information. For different purposes of downlink data transmission, the resource allocation table is different.

According to the indication of the TDRA field in the DCI, the terminal device can obtain the PDSCH information configured by Radio Resource Control (RRC) signaling, including the PDSCH and the Physical Downlink Control Channel (Physical Downlink Control Channel, which schedules the PDSCH). The time slot K0 between the PDCCH), the mapping type, and the starting position S and length L of the PDSCH.

In the NR system, the transmission resource of the PDCCH is determined by the semi-statically configured PDCCH search space (PDCCH search space). The terminal device detects the PDCCH in the semi-statically configured PDCCH search space (hereinafter referred to as the search space) to obtain PDSCH resource allocation information. In NR-U, due to the LBT mechanism, uncertainty in the downlink transmission channel may be caused. In this way, the PDCCH and PDSCH may not be transmitted at the location where the PDCCH and PDSCH should be transmitted.

For example, as shown in Figure 2(a), in case 1, before the semi-statically configured search space arrives, the network device obtains the channel use right through LBT, then the PDCCH is sent according to the pre-configured search space, assuming the pre-configured search space Occupy two symbols. Wherein, the search space in time slot n includes symbol 0 and symbol 1 in time slot n. The network device transmits PDCCH on symbol 0 and symbol 1, and transmits PDSCH on symbol 2 to symbol 13.

In case 2, the network device does not obtain the channel use right before symbol 0, but obtains the channel use right on symbol 3 through LBT. Then, the network equipment postpones the transmission of the PDCCH to symbols 3 and 4, that is, the PDCCH search space is shifted from symbol 0 and symbol 1 to symbol 3 and symbol 4.

In case 3, the network device does not obtain the channel use right before symbol 0, but obtains the channel use right on symbol 7 through LBT. Then, the network equipment postpones the transmission of the PDCCH to

symbols

7 and 8, that is, the PDCCH search space is shifted from symbol 0 and symbol 1 to symbol 7 and symbol 8.

CSI-RS is used to measure channel state information such as Channel Quality Indicator (CQI), Precoding Matrix Indicator (PMI), Rank Indicator (RI), etc. In the NR system, CSI-RS supports a maximum of 32 antenna ports. The CSI-RS on different antenna ports are multiplexed to form a CSI-RS pattern (CSI-RS pattern) through frequency division, time division or code division. For example, as shown in Figure 3, for a CSI-RS with 12 antenna ports, there may be two CSI-RS patterns, where CSI-RS pattern 1 is a group including 6 Code Division Multiplexing (CDM) 2. Each CDM2 group includes two resource elements (Resource Elements, RE), and the CSI-RS of two antenna ports is code-division multiplexed. CSI-RS pattern 2 is a group including 3 CDM4s, each CDM4 group includes 4 REs, and the CSI-RS of 4 antenna ports is code-division multiplexed.

CSI-RS resources are configured by network devices for terminal devices. Considering the cost of CSI-RS resources, when network devices configure CSI-RS resources, they often allocate a set of CSI-RS resources to multiple terminal devices for sharing. . The terminal equipment performs rate matching on the REs in the configured CSI-RS resources. For example, if the REs of the PDSCH resource include REs of the CSI-RS resource configured by the network, puncturing is performed on these REs, that is, no PDSCH is carried on these REs.

For the PDCCH, when the network device configures the PDCCH search space and CSI-RS resources, it considers the RE overlap between the PDCCH and the CSI-RS, and performs corresponding rate matching. These configurations are semi-static, and the network equipment can determine in advance the rate matching method to be used when performing channel coding and resource mapping.

However, in NR-U, due to LBT, the location of the PDCCH resource may change according to the result of LBT, causing the previously determined rate matching method to change. For network equipment, a new rate matching method needs to be determined. For example, when REs between PDCCH and CSI-RS overlap, it is necessary to determine which channel or signal to puncture. For terminal equipment, it is necessary to receive channels or signals according to a new rate matching method. As shown in Figure 4, the search space and CSI-RS resource positions of the network equipment semi-statically configured, the PDCCH search space and CSI-RS resources do not overlap, and there is no need to perform corresponding rate matching, and PDSCH resources and CSI -RS resources overlap, requiring rate matching.

However, as shown in Figure 5, due to the result of LBT, the PDCCH search space is postponed from symbol 1 and symbol 2 semi-statically configured by the network equipment to symbol 7 and symbol 8, and there are semi-statically configured CSI- on

symbols

7 and 8. RS resources. In this way, the original non-overlapping PDCCH search space and CSI-RS resources may overlap in the NR-U system due to LBT. As shown in Figure 5, the RE and CSI-RS of a physical resource block (PRB) in the control resource set (Control Resource Set, CORESET) in the PDCCH search space on symbol 7 and symbol 8 are postponed Overlap between resources. This affects the channel and signal transmission.

The embodiment of the present application provides a method for channel transmission, which can ensure effective transmission of the channel and signal even when a resource conflict occurs between a search space and a signal or with other search spaces.

Fig. 6 is a schematic flowchart of a channel transmission method according to an embodiment of the present application. The method shown in FIG. 6 may be executed by a terminal device or a network device. The terminal device may be, for example, the terminal device 120 shown in FIG. 1, and the network device may be, for example, the network device 110 shown in FIG. 1. This method can be applied to unlicensed frequency bands. As shown in Figure 6, the method includes:

In 610, a preset first search space that can be used to transmit the first control channel is acquired.

In 620, a second search space that can actually be used to transmit the first control channel is acquired.

The first search space and the second search space may be, for example, a dedicated search space, a public search space, or a group public search space of a terminal device.

Optionally, the second search space is located after the first search space.

The second search space is, for example, a search space obtained after the first search space is translated.

For example, due to reasons such as LBT, the first search space that should have been located on the symbol preset in the time slot is postponed to the symbol that obtains the channel usage right.

Referring to FIG. 2, in case 1, the first search space is located at symbol 0 and symbol 1. However, due to LBT, in case 2, the first search space is postponed to symbol 3 and symbol 4. Then the first search space is located at symbol 0 and symbol 1, and the second search space is located at symbol 3 and symbol 4. In case 3, the first search space is postponed to symbol 7 and symbol 8, then the first search space is located at symbol 0 and symbol 1, and the second search space is located at symbol 7 and symbol 8. Therefore, the second search space and the first search space can occupy the same frequency domain resources, but movement occurs in the time domain.

In 630, according to the distribution of the target resource that can be used to transmit the second control channel or the specific signal in the first search space, and/or the distribution of the target resource in the second search space To determine the resources that can be used to transmit the first downlink control channel in the second search space.

Specifically, the network device and the terminal device may determine the first search space according to the distribution of the target resource in the first search space, and/or the distribution of the target resource in the second search space 2. Resource allocation in the search space. For example, determining resources that can be used to transmit the first downlink control channel in the second search space, and/or resources that can be used to transmit the second downlink control channel or a specific signal in the second search space .

Wherein, the target resource that can be used to transmit the second control channel belongs to the third search space. The third search space can be used to transmit the second control channel, and the first search space can be used to transmit the first control channel.

The third search space may be, for example, at least one of the following types: a dedicated search space of a terminal device, a common search space, and a group common PDCCH search space (group common PDCCH search space).

The specific signal may be, for example, at least one of the following types: Channel State Information-Reference Signal (CSI-RS), Synchronizing Signal Block (Synchronizing Signal/PBCH Block, SSB or SS/PBCH Block), Positioning reference signal (Positioning Reference Signal, PRS), tracking reference signal (Tracking Reference Signal, TRS), demodulation reference signal (Dedicated Reference Signal, DMRS), phase tracking reference signal (Phase Tracking Reference Signal, PTRS), etc.

There may be overlapping resources between the target resources that can be used to transmit the second control channel or the specific signal and the first search space. There may also be overlapping resources between the target resource and the second search space. At this time, it is necessary to consider how to ensure effective transmission of channels and/or signals in the second search space.

On the unlicensed frequency band, when the preset first search space that can be used to transmit the first control channel is different from the actual second search space that can be used to transmit the first control channel, the network device And the terminal equipment according to the resource occupancy of other channels or signals in the first search space, and/or the resource occupancy of other channels or signals in the second search space, send and receive signals, so that the search space and the signal Or in the case of resource conflicts with other search spaces, effective transmission of channels and signals is still guaranteed.

For a specific signal, the target resource is a signal resource used to transmit the specific signal; for a second control channel, the target resource is a search space corresponding to the second control channel, that is, a third search space. The method described in the embodiment of the present application can be used in the case of overlap between a signal and a search space, and can also be used in an overlap between different search spaces.

The "preset" described in the embodiments of the present application may be configured by a network device, or may be pre-configured, for example, as agreed in a protocol. For example, the preset first search space that can be used to transmit the first control channel may be the first search space semi-statically configured by the network device.

In addition, the "can be used for transmission" refers to a capability that can or may not be transmitted after having the capability. For example, the second search space is sufficient for transmitting the first control channel, indicating that the resources in the second search space are candidate resources for the first control channel, and the first control channel may be on at least part of the resources in the second search space Instead of transmitting on all resources. For another example, the overlapping resource between the target resource and the second search space can be used to transmit the first control channel, indicating that the overlapping resource can be used as a candidate resource for the first control channel, but the first control channel can be Transmission on overlapping resources, or not on overlapping resources.

The embodiments of this application are described in combination with the following three situations. That is, the target resource overlaps with the first search space, the target resource overlaps with the second search space, and the target resource overlaps with the first search space and overlaps with the second search space .

Situation 1

The target resource overlaps the first search space.

Assume that the target resource and the first search space overlap on the first time-frequency resource.

Optionally, a third time-frequency resource corresponding to the first time-frequency resource in the second search space can be used to transmit the first control channel.

Or, optionally, the first control channel is not transmitted on the third time-frequency resource corresponding to the first time-frequency resource in the second search space. That is, the third time-frequency resource in the second search space is punctured.

The third time-frequency resource in the second search space is associated with the first time-frequency resource in the first search space, and the embodiment of the present application does not limit the association relationship between the two.

For example, the frequency domain positions of the third time-frequency resource and the first time-frequency resource are the same; the time interval between the third time-domain resource and the first time-domain resource, and the first search space and the first The time interval between two search spaces is equal.

For another example, the frequency domain location of the third time-frequency resource is the same as that of the first time-frequency resource; the third time-domain resource is the same as the time-domain resource of the second search space.

For another example, there is a preset distance between the third time-frequency resource and the frequency-domain position of the first time-frequency resource; the time interval between the third time-frequency resource and the first time-domain resource, and The time interval between the first search space and the second search space is equal.

The situation is described with reference to FIG. 7(a) to FIG. 7(c). Taking the situation 3 in FIG. 2 as an example, it is assumed that the specific signal is a CSI-RS. The first search space is located on symbol 0 and symbol 1. The network device does not obtain the channel use right on symbol 0 to symbol 6, but obtains the channel use right on symbol 7, that is, the LBT succeeds, then the second search space is located on symbol 7 and Symbol 8. Since CSI-RS transmission is configured on the first time-frequency resource in the first search space, that is, the first time-frequency resource is reserved in the first search space for CSI-RS transmission, then the second search space needs to be considered Whether the third time-frequency resource corresponding to the first time-frequency resource is vacated or used to transmit the PDCCH.

For example, as shown in Figure 7(b), when the target resource and the first search space overlap on the first time-frequency resource, the position of the third time-frequency resource in the second search space can be punctured, so that it is not used for Transmission of PDCCH.

This ensures that the available resources of the PDCCH remain unchanged, and there is no need to dynamically change the coding and rate matching of the PDCCH, which reduces the processing complexity of the network equipment.

For example, as shown in FIG. 7(c), when the target resource and the first search space overlap on the first time-frequency resource, the position of the third time-frequency resource in the second search space can be used to transmit PDCCH.

In this way, the resources that can be used to transmit the PDCCH become larger, and the transmission performance of the PDCCH is improved. However, the coding and receiving complexity of the terminal equipment is increased to a certain extent.

In this embodiment, the resources that can be used to transmit the PDCCH in the second search space are not only affected by the resource occupation in the second search space, but also by the resource occupation in the first search space.

Situation 2

The target resource overlaps the second search space.

The target resource and the second search space overlap on the second time-frequency resource.

Optionally, the second time-frequency resource in the second search space can be used to transmit the second control channel or the specific signal.

Or, optionally, the second time-frequency resource in the second search space can be used to transmit the first control channel.

For example, as shown in FIG. 8(a), taking Case 3 in FIG. 2 as an example, it is assumed that the specific signal is a CSI-RS. The first search space is located on symbol 0 and symbol 1. The network device does not obtain the channel use right on symbol 0 to symbol 6, but obtains the channel use right on symbol 7, that is, the LBT succeeds, then the second search space is located on symbol 7 and Symbol 8. Since CSI-RS transmission is configured on the second time-frequency resource in the second search space, it is necessary to consider whether to send CSI-RS on the second time-frequency resource in the second search space or whether to send the CSI-RS in the second search space. The second time-frequency resource is used as a candidate resource for transmitting the PDCCH.

For example, as shown in FIG. 8(b), when the target resource and the second search space overlap on the second time-frequency resource, the second time-frequency resource position in the second search space is used to transmit CSI-RS.

In this way, the performance of the CSI-RS as a reference signal is guaranteed, as the reference signal shared by multiple terminal devices in a cell, the measurement accuracy of the CSI-RS as a measurement signal is ensured, and the system throughput is improved.

For example, as shown in FIG. 8(c), when the target resource and the second search space overlap on the second time-frequency resource, the second time-frequency resource position in the second search space can be used to transmit PDCCH.

In this way, by puncturing the resource location of the CSI-RS, the number of available resources of the PDCCH and the detection performance are guaranteed. At the same time, since the number of REs included in the PDCCH search space is not changed, the coding and rate matching of the PDCCH do not need to be dynamically changed, which reduces the processing complexity of the network equipment.

Situation 3

The target resource overlaps the first search space, and the target resource overlaps the second search space.

It is assumed that the target resource and the first search space overlap on a first time-frequency resource, and the target resource and the second search space overlap on a second time-frequency resource.

Optionally, the third time-frequency resource corresponding to the first time-frequency resource in the second search space can be used to transmit the first control channel; and the second time-frequency resource in the second search space can be Used to transmit the second control channel or the specific signal.

Or, optionally, the first control channel is not transmitted on the third time-frequency resource corresponding to the first time-frequency resource in the second search space, that is, the third time-frequency resource is punctured; and The second time-frequency resource in the second search space can be used to transmit the second control channel or the specific signal.

Or, optionally, a third time-frequency resource corresponding to the first time-frequency resource in the second search space can be used to transmit the first control channel; and the second time-frequency resource in the second search space Resources can be used to transmit the first control channel.

Or, optionally, the first control channel is not transmitted on the third time-frequency resource corresponding to the first time-frequency resource in the second search space, that is, the third time-frequency resource is punctured; and The second time-frequency resource in the second search space can be used to transmit the first control channel.

For example, as shown in FIG. 9(a), taking Case 3 in FIG. 2 as an example, it is assumed that the specific signal is a CSI-RS. The first search space is located on symbol 0 and symbol 1. The network device does not obtain the channel use right on symbol 0 to symbol 6, but obtains the channel use right on symbol 7, that is, the LBT succeeds, then the second search space is located on symbol 7 and Symbol 8.

Since CSI-RS transmission is configured on the first time-frequency resource in the first search space, that is, the first time-frequency resource is reserved in the first search space for CSI-RS transmission, then the second search space needs to be considered Whether the third time-frequency resource is vacated or used to transmit PDCCH. In addition, since CSI-RS transmission is configured on the second time-frequency resource in the second search space, it is also necessary to consider whether to send the CSI-RS on the second frequency domain resource in the second search space, or whether to use the second search The second frequency domain resource in the space is used as a candidate resource for transmitting the PDCCH.

For example, as shown in Figure 9(b), when the target resource and the first search space overlap on the first time-frequency resource, and the target resource and the second search space overlap on the second time-frequency resource, the second The third time-frequency resource in the search space can be punctured. At the same time, the second time-frequency resource in the second search space is used to transmit CSI-RS.

For example, as shown in Figure 9(c), when the target resource and the first search space overlap on the first time-frequency resource, and the target resource and the second search space overlap on the second time-frequency resource, the second The third time-frequency resource in the search space can be punctured. At the same time, the second time-frequency resource in the second search space can be used to transmit PDCCH.

For example, as shown in Figure 9(d), when the target resource and the first search space overlap on the first time-frequency resource, and the target resource and the second search space overlap on the second time-frequency resource, the second The third time-frequency resource position in the search space can be used to transmit PDCCH. At the same time, the second time-frequency resource position in the second search space is used for CSI-RS transmission.

For example, as shown in Figure 9(e), when the target resource and the first search space overlap on the first time-frequency resource, and the target resource and the second search space overlap on the second time-frequency resource, the second The third time-frequency resource position in the search space can be used to transmit PDCCH. At the same time, the second time-frequency resource location in the second search space can be used to transmit PDCCH.

In the above three cases, if the target resource and the first search space overlap on the first time-frequency resource, then the second search space can be transmitted on frequency domain resources other than the third time-frequency resource. The first control channel. If the target resource and the second search space overlap on the second time-frequency resource, the first control channel can be transmitted on frequency domain resources other than the second time-frequency resource in the second search space. If the target resource and the first search space overlap on the first time-frequency resource, and the target resource and the second search space overlap on the second time-frequency resource, divide the third time-frequency resource in the second search space The first control channel can be transmitted on frequency domain resources other than the resource and the second time-frequency resource.

In other words, resources that do not overlap with other channel resources or signal resources in the second search space are still used as candidate resources for the first control channel transmission.

The "transmission" described in the embodiments of the present application may include sending or receiving.

For example, for a network device, the network device may determine that the target resource can be distributed in the second search space according to the distribution of the target resource in the first search space and/or the distribution of the target resource in the second search space. The resource is used to send the first downlink control channel, and the channel and/or signal are sent in the second search space.

For another example, for a terminal device, the terminal device can determine the distribution of the target resource in the first search space and/or the distribution of the target resource in the second search space It can be used to receive the resources of the first downlink control channel, and perform channel and/or signal reception in the second search space.

Optionally, in 630, the network device and the terminal device may not only perform channel and/or channel processing based on the distribution of target resources in the first search space and/or the distribution of target resources in the second search space. Signal transmission, and other factors may also be considered, such as the type of the specific signal or the third search space, the size information of the first time-frequency resource, and the size information of the second time-frequency resource.

That is to say, in 630, according to the network device and the terminal device, the channel and/or signal can be transmitted according to at least one of the following information:

The distribution of the target resource in the first search space;

The distribution of the target resource in the second search space;

The type of the specific signal or the third search space;

The size information of the first time-frequency resource and/or the size information of the second time-frequency resource.

Wherein, the size information of the first time-frequency resource is information about the size of the overlapping resource between the target resource and the first search space. For example, it may be the size of the overlapping resource, the proportion of the overlapping resource in the first search space, or the overlapping The proportion of resources to target resources, etc.

The size information of the second time-frequency resource is information about the size of the overlapping resource between the target resource and the second search space. For example, it may be the size of the overlapping resource, the proportion of the overlapping resource in the second search space, or the overlapping resource The percentage of target resources.

For example, when the target resource and the second search space overlap on the second time-frequency resource, the resources that can be used to transmit the PDCCH in the second search space may be determined according to the type of the specific signal. When the specific signal or channel is a dedicated signal or channel of a terminal device, such as a dedicated search space, DMRS, PRS, or PTRS of a terminal device, the second time-frequency resource can be used to send PDCCH, but not to send a specific signal Or channel. When the specific signal or channel is a cell-specific signal or channel, for example, a common search space, a group common search space, CSI-RS, SSB, or TRS, the second time-frequency resource is not used to send PDCCH.

For another example, when the target resource and the second search space overlap on the second time-frequency resource, the resources that can be used to transmit the PDCCH in the second search space may be determined according to the size of the second time-frequency resource. When the specific signal or channel is a cell-specific signal or channel, such as a common search space, group common search space, CSI-RS, SSB, or TRS, if the number of REs included in the second time-frequency resource is greater than the preset value, then The second time-frequency resource is used to transmit a specific signal or channel. If the number of REs included in the second time-frequency resource is less than the preset value, the second time-frequency resource can be used to transmit the PDCCH.

It should be noted that, under the premise of no conflict, the various embodiments described in this application and/or the technical features in each embodiment can be combined with each other arbitrarily, and the technical solutions obtained after the combination should also fall within the protection scope of this application. .

It should be understood that in the various embodiments of the present application, the size of the sequence numbers of the foregoing processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not correspond to the embodiments of the present application. The implementation process constitutes any limitation.

The communication method according to the embodiment of the present application is described in detail above, and the device according to the embodiment of the present application will be described below in conjunction with FIG. 10 to FIG. 13. The technical features described in the method embodiment are applicable to the following device embodiments.

FIG. 10 is a schematic block diagram of a communication device 1000 according to an embodiment of the present application. As shown in FIG. 8, the network device 1000 includes a processing unit 1010. The processing unit 1010 is used to:

Acquiring a preset first search space that can be used to transmit the first control channel;

Acquiring a second search space that can actually be used to transmit the first control channel, where the second search space is located after the first search space;

According to the distribution of target resources that can be used to transmit the second control channel or specific signal in the first search space, and/or the distribution of the target resources in the second search space, determine the Resources in the second search space that can be used to transmit the first downlink control channel, where the target resource that can be used to transmit the second control channel belongs to the third search space.

Therefore, in the unlicensed frequency band, when the preset first search space that can be used to transmit the first control channel is different from the second search space that can actually be used to transmit the first control channel, the time domain position is different, The network equipment and terminal equipment send and receive signals according to the resource occupation of other channels or signals in the first search space, and/or the resource occupation of other channels or signals in the second search space, so that the search space In the case of resource conflicts with signals or other search spaces, effective transmission of channels and signals is still guaranteed.

Optionally, when the target resource and the first search space overlap on the first time-frequency resource, the third time-frequency resource corresponding to the first time-frequency resource in the second search space can be For transmitting the first control channel, or not transmitting the first control channel on the third time-frequency resource in the second search space.

Optionally, the frequency domain position of the third time-frequency resource and the first time-frequency resource are the same. The time interval between the third time domain resource and the first time domain resource is equal to the time interval between the first search space and the second search space.

Optionally, when the target resource and the second search space overlap on a second time-frequency resource. The second time-frequency resource in the second search space can be used to transmit the second control channel or the specific signal, or the second time-frequency resource in the second search space can be used To transmit the first control channel.

Optionally, the first control channel can be transmitted on frequency domain resources other than the third time-frequency resource and the second time-frequency resource in the second search space.

Optionally, the specific signal is at least one of the following signal types: channel state information reference signal CSI-RS, synchronization signal block SSB, tracking reference signal TRS and positioning reference signal PRS, and demodulation reference signal DMRS.

Optionally, the third search space is at least one of the following types: a dedicated search space of a terminal device, a public search space, and a group public search space.

Optionally, the processing unit 1010 is specifically configured to: determine, according to at least one of the following information, resources that can be used to transmit the first downlink control channel in the second search space: the target resource is The distribution of the first search space, the distribution of the target resource in the second search space, the type of the specific signal or the third search space, the size information of the first time-frequency resource, Size information of the second time-frequency resource.

It should be understood that the network device 1000 can perform the corresponding operations performed by the terminal device or the network device in the above method 600, which is not repeated here for brevity.

FIG. 11 is a schematic structural diagram of a communication device 1100 according to an embodiment of the present application. The communication device 1100 shown in FIG. 11 includes a processor 1110, and the processor 1110 can call and run a computer program from the memory to implement the method in the embodiment of the present application.

Optionally, as shown in FIG. 11, the communication device 1100 may further include a memory 1120. The processor 1110 may call and run a computer program from the memory 1120 to implement the method in the embodiment of the present application.

The memory 1120 may be a separate device independent of the processor 1110, or may be integrated in the processor 1110.

Optionally, as shown in FIG. 11, the communication device 1100 may further include a transceiver 1130, and the processor 1110 may control the transceiver 1130 to communicate with other devices. Specifically, it may send information or data to other devices, or receive other devices. Information or data sent by the device.

Wherein, the transceiver 1130 may include a transmitter and a receiver. The transceiver 1130 may further include an antenna, and the number of antennas may be one or more.

Optionally, the communication device 1100 may specifically be a terminal device of an embodiment of the application, and the communication device 1100 may implement the corresponding process implemented by the terminal device in each method of the embodiment of the application. For brevity, details are not repeated here. .

Optionally, the communication device 1100 may specifically be a network device in an embodiment of the application, and the communication device 1100 may implement the corresponding process implemented by the network device in each method of the embodiment of the application. For brevity, details are not repeated here. .

FIG. 12 is a schematic structural diagram of a chip of an embodiment of the present application. The chip 1200 shown in FIG. 12 includes a processor 1210, and the processor 1210 can call and run a computer program from a memory to implement the method in the embodiment of the present application.

Optionally, as shown in FIG. 12, the chip 1200 may further include a memory 1220. The processor 1210 can call and run a computer program from the memory 1220 to implement the method in the embodiment of the present application.

The memory 1220 may be a separate device independent of the processor 1210, or it may be integrated in the processor 1210.

Optionally, the chip 1200 may further include an input interface 1230. The processor 1210 can control the input interface 1230 to communicate with other devices or chips, and specifically, can obtain information or data sent by other devices or chips.

Optionally, the chip 1200 may further include an output interface 1240. The processor 1210 can control the output interface 1240 to communicate with other devices or chips, specifically, can output information or data to other devices or chips.

Optionally, the chip can be applied to the terminal device in the embodiment of the present application, and the chip can implement the corresponding process implemented by the terminal device in each method of the embodiment of the present application. For brevity, details are not described herein again.

Optionally, the chip can be applied to the network device in the embodiment of the present application, and the chip can implement the corresponding process implemented by the network device in each method of the embodiment of the present application. For the sake of brevity, details are not described herein again.

The chips described in the embodiments of the present application may also be referred to as system-level chips, system-on-chips, system-on-chips, or system-on-chips.

The processor in the embodiment of the present application may be an integrated circuit chip with signal processing capability. In the implementation process, the steps of the foregoing method embodiments can be completed by hardware integrated logic circuits in the processor or instructions in the form of software. The above-mentioned processor may be a general-purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a ready-made programmable gate array (Field Programmable Gate Array, FPGA) or other Programming logic devices, discrete gates or transistor logic devices, discrete hardware components. The methods, steps, and logical block diagrams disclosed in the embodiments of the present application can be implemented or executed. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor or the like. The steps of the method disclosed in combination with the embodiments of the present application may be directly embodied as being executed and completed by a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor. The software module can be located in a mature storage medium in the field such as random access memory, flash memory, read-only memory, programmable read-only memory, or electrically erasable programmable memory, registers. The storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.

The memory in the embodiments of the present application may be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. Among them, the non-volatile memory can be Read-Only Memory (ROM), Programmable Read-Only Memory (Programmable ROM, PROM), Erasable Programmable Read-Only Memory (Erasable PROM, EPROM), and Erase programmable read-only memory (Electrically EPROM, EEPROM) or flash memory. The volatile memory may be a random access memory (Random Access Memory, RAM), which is used as an external cache. By way of exemplary but not restrictive description, many forms of RAM are available, such as static random access memory (Static RAM, SRAM), dynamic random access memory (Dynamic RAM, DRAM), synchronous dynamic random access memory (Synchronous DRAM, SDRAM), Double Data Rate Synchronous Dynamic Random Access Memory (Double Data Rate SDRAM, DDR SDRAM), Enhanced Synchronous Dynamic Random Access Memory (Enhanced SDRAM, ESDRAM), Synchronous Link Dynamic Random Access Memory (Synchlink DRAM, SLDRAM) ) And Direct Rambus RAM (DR RAM). It should be noted that the memories of the systems and methods described herein are intended to include, but are not limited to, these and any other suitable types of memories.

The above-mentioned memory is illustrative but not restrictive. For example, the memory in the embodiment of the present application may also be static random access memory (Static RAM, SRAM), dynamic random access memory (Dynamic RAM, DRAM), and synchronous dynamic random access memory (DRAM). Access memory (Synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (Double Data Rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (Enhanced SDRAM, ESDRAM), synchronous connection dynamic random access memory Take memory (Synch Link DRAM, SLDRAM) and direct memory bus random access memory (Direct Rambus RAM, DR RAM) and so on. That is to say, the memory in the embodiments of the present application is intended to include but not limited to these and any other suitable types of memory.

FIG. 13 is a schematic block diagram of a communication system 1300 according to an embodiment of the present application. As shown in FIG. 13, the communication system 1300 includes a communication device 1310, which may be a network device or a terminal device.

The network device 1310 is configured to: obtain a preset first search space that can be used to transmit the first control channel; obtain a second search space that can actually be used to transmit the first control channel, where the second search space is located in the After the first search space; according to the distribution of target resources that can be used to transmit the second control channel or specific signals in the first search space, and/or the target resources in the second search space The distribution situation is to determine the resources that can be used to transmit the first downlink control channel in the second search space, where the target resources that can be used to transmit the second control channel belong to the third search space.

Optionally, the communication device 1310 may be used to implement the corresponding functions implemented by the network device or terminal device in the above method 600, and the composition of the communication device 1310 may be as shown in the communication device 1000 in FIG. 10, for simplicity, I won't repeat them here.

The embodiments of the present application also provide a computer-readable storage medium for storing computer programs. Optionally, the computer-readable storage medium may be applied to the network device in the embodiment of the present application, and the computer program causes the computer to execute the corresponding process implemented by the network device in each method of the embodiment of the present application. Repeat. Optionally, the computer-readable storage medium may be applied to the terminal device in the embodiment of the present application, and the computer program causes the computer to execute the corresponding process implemented by the terminal device in each method of the embodiment of the present application. Repeat.

The embodiments of the present application also provide a computer program product, including computer program instructions. Optionally, the computer program product can be applied to the network device in the embodiment of the present application, and the computer program instructions cause the computer to execute the corresponding process implemented by the network device in each method of the embodiment of the present application. For the sake of brevity, it is not here. Repeat it again. Optionally, the computer program product can be applied to the terminal device in the embodiment of the present application, and the computer program instructions cause the computer to execute the corresponding process implemented by the terminal device in each method of the embodiment of the present application. For the sake of brevity, it is not here. Repeat it again.

The embodiment of the application also provides a computer program. Optionally, the computer program can be applied to the network device in the embodiment of the present application. When the computer program is run on the computer, the computer is caused to execute the corresponding process implemented by the network device in each method of the embodiment of the present application. For the sake of brevity , I won’t repeat it here. Optionally, the computer program can be applied to the terminal device in the embodiment of the present application. When the computer program runs on the computer, it causes the computer to execute the corresponding process implemented by the terminal device in each method of the embodiment of the present application. For the sake of brevity , I won’t repeat it here.

Those skilled in the art can clearly understand that, for the convenience and conciseness of description, the specific working process of the above-described system, device, and unit can refer to the corresponding process in the foregoing method embodiment, which is not repeated here.

The terms "system" and "network" in the embodiments of the present invention are often used interchangeably herein. The term "and/or" in this article is only an association relationship describing the associated objects, which means that there can be three relationships, for example, A and/or B, which can mean: A alone exists, A and B exist at the same time, exist alone B these three situations. In addition, the character "/" in this text generally indicates that the associated objects before and after are in an "or" relationship.

In the embodiment of the present invention, "B corresponding (corresponding) to A" means that B is associated with A, and B can be determined according to A. However, it should also be understood that determining B according to A does not mean that B is determined only according to A, and B can also be determined according to A and/or other information.

A person of ordinary skill in the art may be aware that the units and algorithm steps of the examples described in combination with the embodiments disclosed herein can be implemented by electronic hardware or a combination of computer software and electronic hardware. Whether these functions are performed by hardware or software depends on the specific application and design constraint conditions of the technical solution. Professionals and technicians can use different methods for each specific application to implement the described functions, but such implementation should not be considered beyond the scope of this application.

In the several embodiments provided in this application, it should be understood that the disclosed system, device, and method may be implemented in other ways. For example, the device embodiment described above is only illustrative. For example, the division of the unit is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components may be combined or may be Integrate into another system, or some features can be ignored or not implemented. In addition, the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.

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

If the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium. Based on this understanding, the technical solution of this application essentially or the part that contributes to the existing technology or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disk and other media that can store program code .

The above are only specific implementations of this application, but the protection scope of this application is not limited to this. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed in this application. Should be covered within the scope of protection of this application. Therefore, the protection scope of this application shall be subject to the protection scope of the claims.

Claims

A channel transmission method, characterized in that the method is applied to an unlicensed frequency band, and the method includes:

Acquiring a preset first search space that can be used to transmit the first control channel;

Acquiring a second search space that can actually be used to transmit the first control channel, where the second search space is located after the first search space;

According to the distribution of target resources that can be used to transmit the second control channel or specific signal in the first search space, and/or the distribution of the target resources in the second search space, determine the Resources in the second search space that can be used to transmit the first downlink control channel, where the target resource that can be used to transmit the second control channel belongs to the third search space.
The method according to claim 1, wherein when the target resource and the first search space overlap on the first time-frequency resource,

The third time-frequency resource corresponding to the first time-frequency resource in the second search space can be used to transmit the first control channel, or the third time-frequency resource in the second search space The first control channel is not transmitted on the resource.
The method of claim 2, wherein:

The frequency domain position of the third time-frequency resource and the first time-frequency resource are the same;

The time interval between the third time domain resource and the first time domain resource is equal to the time interval between the first search space and the second search space.
The method according to claim 2 or 3, wherein when the target resource and the second search space overlap on a second time-frequency resource,

The second time-frequency resource in the second search space can be used to transmit the second control channel or the specific signal, or the second time-frequency resource in the second search space can be used To transmit the first control channel.
The method according to claim 4, wherein the first control can be transmitted on frequency domain resources other than the third time-frequency resource and the second time-frequency resource in the second search space channel.
The method according to claim 1, wherein when the target resource and the second search space overlap on a second time-frequency resource,

The second time-frequency resource in the second search space can be used to transmit the second control channel or the specific signal, or the second time-frequency resource in the second search space can be used To transmit the first control channel.
The method according to any one of claims 1 to 6, wherein the specific signal is at least one of the following signal types:

Channel state information reference signal CSI-RS, synchronization signal block SSB, tracking reference signal TRS and positioning reference signal PRS, demodulation reference signal DMRS.
The method according to any one of claims 1 to 7, wherein the third search space is at least one of the following types:

The dedicated search space, public search space, and group public search space of terminal equipment.
The method according to any one of claims 1 to 8, wherein the distribution of target resources that can be used to transmit a second control channel or a specific signal in the first search space is based on, and/ Or, the distribution of the target resource in the second search space, and determining the resources that can be used to transmit the first downlink control channel in the second search space includes:

Determine the resources that can be used to transmit the first downlink control channel in the second search space according to at least one of the following information: the distribution of the target resources in the first search space, the The distribution of the target resource in the second search space, the type of the specific signal or the third search space, the size information of the first time-frequency resource, and the size information of the second time-frequency resource.
A communication device, wherein the communication device is applied to an unlicensed frequency band, and the communication device includes:

A processing unit, configured to obtain a preset first search space that can be used to transmit the first control channel;

The processing unit is further configured to obtain a second search space that can actually be used to transmit the first control channel, where the second search space is located after the first search space;

The processing unit is further configured to: according to the distribution of target resources that can be used to transmit a second control channel or a specific signal in the first search space, and/or, the target resources are in the second search space According to the distribution situation in the second search space, the resources that can be used to transmit the first downlink control channel in the second search space are determined, where the target resources that can be used to transmit the second control channel belong to the third search space.
The communication device according to claim 10, wherein when the target resource and the first search space overlap on the first time-frequency resource,

The third time-frequency resource corresponding to the first time-frequency resource in the second search space can be used to transmit the first control channel, or the third time-frequency resource in the second search space The first control channel is not transmitted on the resource.
The communication device according to claim 11, wherein:

The frequency domain position of the third time-frequency resource and the first time-frequency resource are the same;

The time interval between the third time domain resource and the first time domain resource is equal to the time interval between the first search space and the second search space.
The communication device according to claim 11 or 12, wherein when the target resource and the second search space overlap on a second time-frequency resource,

The second time-frequency resource in the second search space can be used to transmit the second control channel or the specific signal, or the second time-frequency resource in the second search space can be used To transmit the first control channel.
The communication device according to claim 13, wherein the frequency domain resources other than the third time-frequency resource and the second time-frequency resource in the second search space can transmit the first Control channel.
The communication device according to claim 10, wherein when the target resource and the second search space overlap on a second time-frequency resource,

The second time-frequency resource in the second search space can be used to transmit the second control channel or the specific signal, or the second time-frequency resource in the second search space can be used To transmit the first control channel.
The communication device according to any one of claims 10 to 15, wherein the specific signal is at least one of the following signal types:

Channel state information reference signal CSI-RS, synchronization signal block SSB, tracking reference signal TRS and positioning reference signal PRS, demodulation reference signal DMRS.
The communication device according to any one of claims 10 to 16, wherein the third search space is at least one of the following types:

The dedicated search space, public search space, and group public search space of terminal equipment.
The communication device according to any one of claims 10 to 17, wherein the processing unit is specifically configured to:

Determine the resources that can be used to transmit the first downlink control channel in the second search space according to at least one of the following information: the distribution of the target resources in the first search space, the The distribution of the target resource in the second search space, the type of the specific signal or the third search space, the size information of the first time-frequency resource, and the size information of the second time-frequency resource.
A communication device, wherein the communication device comprises a processor and a memory, the memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory to execute claim 1. To the method of any one of 9.
A chip, characterized in that the chip includes a processor, the processor is used to call and run a computer program from the memory, so that the device installed with the chip executes any one of claims 1 to 9 method.
A computer-readable storage medium, characterized in that it is used to store a computer program that enables a computer to execute the method according to any one of claims 1 to 9.
A computer program product, characterized by comprising computer program instructions, which cause a computer to execute the method according to any one of claims 1 to 9.
A computer program, wherein the computer program causes a computer to execute the method according to any one of claims 1 to 9.
A communication system, characterized by comprising: the communication device according to any one of claims 10 to 18.