Communication method and apparatus

Abstract

A communication method and apparatus. The method comprises: receiving a first signal, wherein the first signal comprises a data sub-signal and a pilot sub-signal corresponding to the data sub-signal, and time-frequency resources occupied by the first signal are associated with a first time-frequency resource set; and on the basis of a detection result of the data sub-signal, determining whether to detect a physical downlink control channel (PDCCH) in the first time-frequency resource set. In the method, the first signal is introduced, the data sub-signal in the first signal is used for the terminal device to determine whether to detect the PDCCH, the terminal device detects the PDCCH only when the data sub-signal is successfully detected, and the terminal device receives the PDCCH associated with the first signal, so that the terminal device can detect the PDCCH on demand. In this way, the terminal device can be prevented from traversing all possible resource positions to perform PDCCH blind detection, thereby reducing the overhead when the terminal device performs the PDCCH blind detection.

Description

Communication method and apparatus

[0001] This application claims priority to the Chinese Patent Application No. 202410765624.6, filed on June 13, 2024, and entitled "Communication method and apparatus", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to the technical field of communication, and in particular to a communication method and apparatus. BACKGROUND

[0003] The network device configures a plurality of resource locations for the terminal device, each of the plurality of resource locations being capable of being used for the network device to send a physical downlink control channel (PDCCH) to the terminal device. Wherein, when the network device actually sends the PDCCH, it can only send the PDCCH on part of the resource locations.

[0004] Since the terminal device is uncertain about the specific resource location where the PDCCH sent by the network device is located, the terminal device needs to perform descrambling, rate matching, decoding, cyclic redundancy check (CRC) check and other processing on the signal transmitted on each resource location where the PDCCH may exist. If the decoding is successful, it indicates that the resource location exists the PDCCH of the terminal device, and if the decoding fails, it indicates that the resource location does not exist the PDCCH of the terminal device. However, this will result in a large overhead when the terminal device performs PDCCH blind detection. SUMMARY

[0005] The present application provides a communication method and apparatus, which can reduce the overhead when the terminal device performs PDCCH blind detection.

[0006] In a first aspect, an embodiment of the present application provides a communication method, which can be applied to a terminal device, such as a terminal or a communication module in a terminal, or a circuit or chip responsible for communication function in a terminal (such as a Modem chip, also known as a baseband chip, or a System on Chip (SoC) chip or a System in Package (SIP) chip containing a modem core). Taking the case where the method is applied to a terminal, the method comprises: receiving a first signal, wherein the first signal comprises a data sub-signal and a pilot sub-signal corresponding to the data sub-signal, and the time-frequency resources occupied by the first signal are associated with a first set of time-frequency resources;

[0007] determining whether a physical downlink control channel (PDCCH) is detected in the first time-frequency resource set according to a detection result of the data sub-signal.

[0008] By introducing the first signal, the data sub-signal in the first signal is used for the terminal device to determine whether the PDCCH is detected in the first time-frequency resource set, the terminal device detects the PDCCH only when the data sub-signal is successfully detected, and the terminal device receives the PDCCH associated with the first signal, so that the terminal device can detect the PDCCH on demand, which can avoid the terminal device from performing PDCCH blind detection by traversing all possible resource positions, thereby reducing the overhead of the terminal device performing PDCCH blind detection.

[0009] In a possible design, the pilot sub-signal is located at a first position of the data sub-signal.

[0010] By introducing the pilot sub-signal as the demodulation reference signal of the data sub-signal, the success rate of detecting the data sub-signal is improved.

[0011] In a possible design, the pilot sub-signal is located at a first position of the data sub-signal, and the pilot sub-signal is distributed in a discrete form in a range corresponding to the first position.

[0012] For example, the first position can be a same or adjacent time domain position of the data sub-signal, the range corresponding to the first position is all or part of time domain symbols occupied by the data sub-signal, or the first position is an adjacent time domain symbol of the time domain symbol occupied by the data sub-signal. By introducing the pilot sub-signal into the data sub-signal in a discrete form, the power consumption for demodulating the data sub-signal can be reduced.

[0013] In a possible design, the time-frequency resource occupied by the first signal includes first time domain resources, the first time-frequency resource set includes second time domain resources, the first time domain resources are same as the second time domain resources, or part of the first time domain resources are same as the second time domain resources.

[0014] By using the above method, when the first time domain resources are same as the second time domain resources or the second time domain resources are smaller than the first time domain resources, the first signal and the PDCCH can be transmitted through the same beam, thereby saving transmission cost.

[0015] In a possible design, the time-frequency resource occupied by the first signal includes first frequency domain resources, the first time-frequency resource set includes second frequency domain resources, and a number of frequency domain units spaced between the first frequency domain resources and the second frequency domain resources is less than or equal to a first threshold.

[0016] By using the method, the frequency domain resources occupied by the first signal and the first time-frequency resource set can be reduced, and the scheduling of other resources can be hindered.

[0017] In a possible design, the number of frequency domain units included in the first frequency domain resource is related to the length of the first signal.

[0018] By using the method, the frequency domain resources occupied by the first signal can be reasonably allocated, and resource waste can be avoided.

[0019] In a possible design, the number of frequency domain units included in the first frequency domain resource is related to the length of the first signal, and the length of the first signal is the sum of the length of the data sub-signal and the length of the pilot sub-signal.

[0020] In a possible design, the method further includes: receiving configuration information of the first signal; wherein the configuration information includes at least one of the following information: frequency domain density, offset, time domain length occupied by the data sub-signal, or sequence length of the data sub-signal, or the configuration information further includes the length of the pilot sub-signal; and determining the length of the pilot sub-signal according to the configuration information.

[0021] By using the method, the terminal can detect the received first signal according to the configuration of the first signal, and the detection complexity can be reduced.

[0022] In a possible design, the pilot sub-signal is distributed in a discrete form in the range corresponding to the first position, and satisfies the following formula: k=(nk'+offset)+(n Last *12)+1 k'=0,1…L PS -1

[0023] wherein k is the position of the pilot sub-signal in the range corresponding to the first position, n is the frequency domain density, L PS is the length of the pilot sub-signal, offset is the offset, and the value of offset can be positive or negative, n Last is the end position of the frequency domain resource corresponding to the first time-frequency resource set.

[0024] In a possible design, the method further includes: sending first information, wherein the first information indicates a type of the first signal supported by the terminal, and the type of the first signal has a corresponding relationship with time-frequency resources of the first time-frequency resource set.

[0025] In a possible design, the method further includes: receiving second information, where the second information indicates a type of the first signal used by the network device, and the type of the first signal has a correspondence relationship with a time-frequency resource of the first time-frequency resource set.

[0026] In a possible design, the time-frequency resource of the first time-frequency resource set includes any one of the following: a control resource set, a search space, a listening occasion, or a PDCCH candidate.

[0027] In a possible design, the determining whether to detect a PDCCH within the first time-frequency resource set according to the detection result of the data sub-signal includes:

[0028] detecting the PDCCH within the first time-frequency resource set if the detection on the data sub-signal is successful; or

[0029] not detecting the PDCCH within the first time-frequency resource set if the detection on the data sub-signal is unsuccessful.

[0030] In a possible design, the pilot sub-signal is a demodulation reference signal of the data sub-signal.

[0031] In a second aspect, an embodiment of the present application provides another communication method, which can be applied to a network device, for example, an access network device on a network side or a component (for example, a circuit, a processor, a chip, or a chip system) in the access network device. For example, the method is applied to an access network device, and the method includes: sending a first signal, where a time-frequency resource occupied by the first signal is associated with a first time-frequency resource set, the first signal includes a data sub-signal and a pilot sub-signal corresponding to the data sub-signal; sending the first time-frequency resource set; and the data sub-signal is used to determine whether to detect a PDCCH within the first time-frequency resource set.

[0032] By introducing the first signal, the terminal device determines whether to detect the PDCCH, and the terminal device detects the PDCCH only when the first signal is successfully received, and the terminal device receives the PDCCH associated with the first signal. Therefore, the terminal device can detect the PDCCH on demand, which can avoid the terminal device from performing PDCCH blind detection on all possible resource positions, thereby reducing the overhead of the terminal device performing PDCCH blind detection.

[0033] In a possible design, the pilot sub-signal is located at a first position of the data sub-signal.

[0034] In a possible design, the pilot sub-signal is located at a first position of the data sub-signal, and the pilot sub-signal is distributed in a discrete manner in a range corresponding to the first position.

[0035] In a possible design, the time-frequency resource occupied by the first signal includes the first time-domain resource, and the first set of time-frequency resources includes a second time-domain resource, where the first time-domain resource is the same as the second time-domain resource, or the first time-domain resource is partially the same as the second time-domain resource.

[0036] In a possible design, the time-frequency resource occupied by the first signal includes the first frequency-domain resource, and the first set of time-frequency resources includes a second frequency-domain resource, where a number of frequency-domain units spaced between the first frequency-domain resource and the second frequency-domain resource is less than or equal to a first threshold.

[0037] In a possible design, the first frequency-domain resource contains a number of frequency-domain units related to a length of the first signal.

[0038] In a possible design, the first frequency-domain resource contains a number of frequency-domain units related to a length of the first signal, and the length of the first signal is a sum of a length of the data sub-signal and a length of the pilot sub-signal.

[0039] In a possible design, the method further includes determining configuration information of the first signal, and the configuration information includes at least one of the following information: a frequency-domain density, an offset, a time-domain length occupied by the data sub-signal, or a sequence length of the data sub-signal.

[0040] In a possible design, the method further includes determining a length of the pilot sub-signal.

[0041] In a possible design, the method further includes receiving first information, where the first information indicates a type of the first signal supported by the terminal, and the type of the first signal has a corresponding relationship with a time-frequency resource of the first set of time-frequency resources.

[0042] In a possible design, the method further includes sending second information, where the second information indicates a type of the first signal used by the network device, and the type of the first signal has a corresponding relationship with a time-frequency resource of the first set of time-frequency resources.

[0043] In a possible design, the time-frequency resource of the first set of time-frequency resources includes any one of the following: a control resource set, a search space, a listening occasion, or a candidate PDCCH.

[0044] In one possible design, the pilot sub-signal is a demodulation reference signal of the data sub-signal.

[0045] In a third aspect, the present disclosure provides a communication apparatus, which can execute the method in the first aspect. The communication apparatus has the functions of the first aspect, for example, the communication apparatus includes modules or units or means corresponding to the operations of the first aspect, and the modules or units or means can be implemented in software, or in hardware, or in a combination of software and hardware. The operations performed by the communication apparatus and the beneficial effects of the communication apparatus have been described in the method of the first aspect.

[0046] In a fourth aspect, the present disclosure provides a communication apparatus, which can execute the method in the second aspect. The communication apparatus has the functions of the second aspect, for example, the communication apparatus includes modules or units or means corresponding to the operations of the second aspect, and the modules or units or means can be implemented in software, or in hardware, or in a combination of software and hardware. The operations performed by the communication apparatus and the beneficial effects of the communication apparatus have been described in the method of the second aspect.

[0047] In a fifth aspect, the present disclosure provides a communication apparatus, which includes one or more processors. The one or more processors can execute the computer program or instructions, and when the computer program or instructions are executed, the communication apparatus can implement the method in any possible design or implementation manner of the first aspect.

[0048] In one possible design, the communication apparatus can further include an interface circuit, and the processor can be configured to communicate with other apparatuses or components through the interface circuit.

[0049] In one possible design, the communication apparatus can further include a memory, which can be configured to store part or all of the necessary computer program or instructions for implementing the functions of the first aspect.

[0050] The communication apparatus can be a terminal, or a communication module in a terminal, or a chip responsible for communication functions in a terminal, such as a Modem chip (also referred to as a baseband chip), or a System on Chip (SoC) or a System in Package (SIP) chip that includes a Modem module.

[0051] In a sixth aspect, the present application provides a communication apparatus, comprising one or more processors, which can execute the computer programs or instructions, and when the computer programs or instructions are executed, the communication apparatus implements the method in any possible design or implementation manner of the second aspect.

[0052] In a possible example, the communication apparatus further comprises a memory, which is used to store part or all of the necessary computer programs or instructions for implementing the functions related to the second aspect.

[0053] In a seventh aspect, the present application provides a communication system, comprising the apparatus of the third aspect and the apparatus of the fourth aspect.

[0054] In an eighth aspect, the present application provides a computer readable storage medium, which stores instructions or programs, and when the instructions or programs run on a communication apparatus, the instructions make the communication apparatus execute the method in the first aspect, the second aspect, any possible implementation manner of the first aspect or any possible implementation manner of the second aspect.

[0055] In a ninth aspect, the present application provides a computer program product, which comprises computer programs or instructions, and when the computer programs or instructions run on a computer, the instructions of the method in the first aspect, the second aspect, any possible implementation manner of the first aspect or any possible implementation manner of the second aspect. BRIEF DESCRIPTION OF DRAWINGS

[0056] FIG. 1 is a schematic diagram of a network architecture provided by the present application;

[0057] FIG. 2 is a schematic diagram of a data structure of wireless network communication provided by the present application;

[0058] FIG. 3 is a schematic diagram of PDCCH configuration provided by the present application;

[0059] FIG. 4 is a schematic diagram of an interaction flow of a communication method provided by the present application;

[0060] FIG. 5 is a schematic diagram of a time-frequency domain resource provided by the present application;

[0061] FIG. 6 is a schematic diagram of a communication apparatus provided by the present application;

[0062] FIG. 7 is a schematic diagram of another communication apparatus provided by the present application; and

[0063] FIG. 8 is a schematic diagram of a communication system structure provided by the present application. DETAILED DESCRIPTION

[0064] The embodiment of the present application provides a communication method and device, which are used for reducing the overhead of blind detection of a terminal device. The technical solutions in the embodiment of the present application will be described below with reference to the drawings.

[0065] The technical solutions of the present application can be applied to a terrestrial network (TN), a non-terrestrial network (NTN), or a scenario in which the NTN and the TN are fused. The NTN system can be, for example, a satellite communication system, a high altitude platform station (HAPS) communication system, a global navigation satellite system (GNSS), and the like. The TN system can be, for example, a fourth generation (4th generation, 4G) communication system (for example, a long term evolution (long term evolution, LTE) system), a worldwide interoperability for microwave access (worldwide interoperability for microwave access, WiMAX) communication system, a fifth generation (5th generation, 5G) communication system (for example, a new radio (new radio, NR) system), and a future communication network system, and the like.

[0066] In order to better understand the embodiments of the present application, the network architecture of the embodiments of the present application will be described first. Please refer to FIG. 1, which is an architecture schematic diagram of a communication system to which the embodiments of the present application are applied. It should be noted that FIG. 1 is a possible and non-limiting system schematic diagram. As shown in FIG. 1, the communication system 10 includes a radio access network (RAN) 100 and a core network (CN) 200, and optionally, the communication system 10 can also include an Internet 300. The RAN 100 includes at least one RAN node (such as 110a and 110b in FIG. 1, collectively referred to as 110) and at least one terminal (such as 120a-120j in FIG. 1, collectively referred to as 120). The RAN 100 can also include other RAN nodes, for example, a wireless relay device and / or a wireless backhaul device (not shown in FIG. 1), etc. The terminal 120 is connected to the RAN node 110 in a wireless manner. The RAN node 110 is connected to the core network 200 in a wireless or wired manner. The core network network element in the core network 200 and the RAN node 110 in the RAN 100 can be different physical devices respectively, or can be the same physical device integrated with the logical functions of the core network and the logical functions of the radio access network, or can be a physical device integrated with the functions of part of the core network network element and the functions of part of the RAN node 110. The terminals and the terminals, and the RAN nodes 110 and the RAN nodes 110 can be connected to each other in a wired or wireless manner. FIG. 1 is only a schematic diagram, and the communication system can also include other network devices, such as a wireless relay device and a wireless backhaul device, which are not shown in FIG. 1.

[0067] The RAN 100 can be a 3rd generation partnership project (3GPP) related cellular system, for example, a 4G, 5G mobile communication system, or a future-oriented evolution system. The RAN 100 can also be an open radio access network (O-RAN or ORAN), a cloud radio access network (CRAN), or a wireless fidelity (WiFi) system. The RAN 100 can also be a communication system in which two or more of the above systems are integrated.

[0068] The RAN nodes 110, which can also be referred to as radio access network devices, access network devices, RAN entities, or access nodes, etc., form part of a communication system to help terminals to access the wireless access. The RAN nodes 110 in the communication system 10 can be of the same type or of different types. In some scenarios, the roles of the RAN nodes 110 and the terminals 120 are relative, e.g., the network element 120i in Figure 1 can be a helicopter or a drone, which can be configured to be a mobile base station, for a terminal 120j accessing to the RAN 100 through the network element 120i, the network element 120i is a base station; but for the base station 110a, the network element 120i is a terminal. The RAN nodes 110 and the terminals 120 are sometimes referred to as communication apparatuses, e.g., the network elements 110a and 110b in Figure 1 can be understood as communication apparatuses with base station functionalities, and the network elements 120a-120j can be understood as communication apparatuses with terminal functionalities.

[0069] In a possible scenario, the RAN nodes 110 can be base stations, evolved NodeBs (eNodeBs), access points (APs), transmission reception points (TRPs), next generation NodeBs (gNBs), base stations in future mobile communication systems, or access nodes in a WiFi system, etc. The RAN nodes 110 can be macro base stations (like 110a in Figure 1), micro base stations or indoor stations (like 110b in Figure 1), relay nodes or donor nodes, or wireless controllers in a CRAN scenario. Optionally, the RAN nodes 110 can also be servers, wearable devices, vehicles or vehicle-mounted devices, etc. For example, the wireless access network device in vehicle to everything (V2X) technology can be a road side unit (RSU). All or part of the functions of the RAN nodes 110 in this application can also be implemented by software functions running on hardware, or by virtualized functions instantiated on a platform (e.g., a cloud platform). The RAN nodes 110 in this application can also be logical nodes, logical modules, or software capable of implementing all or part of the functions of the RAN nodes 110.

[0070] In another possible scenario, a terminal is assisted by multiple RAN nodes 110 to implement wireless access in cooperation, and different RAN nodes 110 respectively implement part of the functions of a base station. For example, the RAN node 110 can be a central unit (CU), a distributed unit (DU), a CU-control plane (CP), a CU-user plane (UP), or a radio unit (RU), etc. The CU and the DU can be separately arranged, or can also be included in the same network element, such as a baseband unit (BBU). The RU can be included in a radio frequency device or a radio frequency unit, such as a remote radio unit (RRU), an active antenna processing unit (AAU), or a remote radio head (RRH).

[0071] In different systems, the CU (or CU-CP and CU-UP), DU or RU can also have different names, but those skilled in the art can understand their meanings. For example, in an ORAN system, the CU can also be referred to as an O-CU (open CU), the DU can also be referred to as an O-DU, the CU-CP can also be referred to as an O-CU-CP, the CU-UP can also be referred to as an O-CU-UP, and the RU can also be referred to as an O-RU. For the convenience of description, the CU, CU-CP, CU-UP, DU and RU are taken as examples for description in this application. Any one of the CU (or CU-CP, CU-UP), DU and RU in this application can be implemented by a software module, a hardware module, or a combination of a software module and a hardware module.

[0072] The terminal can also be referred to as a terminal device, user equipment (UE), mobile station, mobile terminal, etc. The terminal can be widely applied to various scenarios, such as device-to-device (D2D), vehicle to everything (V2X) communication, machine-type communication (MTC), internet of things (IOT), virtual reality, augmented reality, industrial control, automatic driving, remote medical treatment, smart power grid, smart furniture, smart office, smart wear, smart transportation, smart city, etc. The terminal can be a mobile phone, tablet computer, computer with wireless transceiver function, wearable device, vehicle, unmanned aerial vehicle, helicopter, airplane, ship, robot, mechanical arm, smart home device, etc. Embodiments of the present application do not limit the device form of the terminal.

[0073] For ease of description, the following describes the base station as an example of the RAN node 110. The base station and the terminal can be fixed in position or mobile. The base station and the terminal can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; can also be deployed on water surface; can also be deployed on airplanes, balloons and artificial satellites. Embodiments of the present application do not limit the application scenarios of the base station and the terminal.

[0074] The roles of the base station and the terminal can be relative, for example, the helicopter or unmanned aerial vehicle 120i in FIG. 1 can be configured as a mobile base station, and for those terminals 120j accessing the wireless access network 100 through 120i, the terminal 120i is a base station; but for the base station 110a, 120i is a terminal, that is, 110a and 120i communicate through a wireless air interface protocol. Of course, 110a and 120i can also communicate through an interface protocol between base stations and base stations, at this time, relative to 110a, 120i is also a base station. Therefore, the base station and the terminal can be collectively referred to as a communication apparatus, 110a and 110b in FIG. 1 can be referred to as a communication apparatus with base station function, and 120a-120j in FIG. 1 can be referred to as a communication apparatus with terminal function.

[0075] The base station and the terminal, the base station and the base station, and the terminal and the terminal can communicate through licensed spectrum, can communicate through unlicensed spectrum, and can communicate through both licensed spectrum and unlicensed spectrum; can communicate through spectrum below 6 gigahertz (GHz), can communicate through spectrum above 6 GHz, and can also communicate through both spectrum below 6 GHz and spectrum above 6 GHz. Embodiments of the present application do not limit the spectrum resources used for wireless communication.

[0076] In the embodiments of the present application, the functions of the base station can also be performed by a module (such as a chip) in the base station, or by a control subsystem containing the functions of the base station. The control subsystem containing the functions of the base station herein can be a control center in the above-mentioned application scenarios such as smart grid, industrial control, intelligent transportation, and smart city. The functions of the terminal can also be performed by a module (such as a chip or modem) in the terminal, or by a device containing the functions of the terminal.

[0077] In order to facilitate the understanding of the related content of the embodiments of the present application, the following will explain some of the terms and processes involved in the embodiments of the present application. This part is only for easy understanding and cannot be regarded as the disclosure or specific limitation of the technical solutions of the present application.

[0078] 1. Data structure of wireless network communication

[0079] The wireless communication system can use orthogonal frequency division multiplexing (OFDM) in uplink and downlink, OFDM and single carrier frequency division multiplexing (SC-FDM) divide the system bandwidth into a plurality of orthogonal subcarriers, each subcarrier can be modulated with data, and the modulated symbol can be transmitted in the frequency domain or the time domain.

[0080] Exemplarily, the frame structure of wireless communication can be frequency division duplex (FDD), for a specific set of subcarriers, the subframes in the set are dedicated to downlink (DL) or uplink (UL);

[0081] Exemplarily, the frame structure of wireless communication can be time division duplex (TDD), for a specific set of subcarriers, the subframes in the set can be used for DL and UL at the same time.

[0082] FIG. 2 shows a schematic diagram of the data structure of wireless network communication based on the present application. Taking the frame structure as TDD for example, referring to FIG. 2, where D represents DL, U represents UL, and X represents flexible conversion in DL and UL. The UE can configure the format of the slot through the received time slot format indicator. The configuration method can be, for example, dynamic configuration through downlink control information (DCI), or static configuration through RRC signaling. Here, the DCI and RRC signaling can come from the base station.

[0083] In Figure 2, a 10ms frame is divided into 10 equal-sized 1ms subframes. Each subframe may include one or more time slots. Depending on the format of the time slots, each time slot may include 14 or other numbers of symbols (14 in the figure). Subframes may also include micro-time slots, which typically have fewer symbols than the entire time slot. Other wireless communication technologies may have different frame structures and / or different channels.

[0084] The grid in Figure 2 can be used to represent the frame structure, with each time slot comprising, for example, a resource block (RB) of 12 consecutive subcarriers (also known as a physical RB (PRB)). Exemplarily, a resource block can also be divided into multiple resource elements (REs), the number of bits carried by each RE depending on the modulation scheme. As shown in Figure 2, some REs are used to carry the UE's reference signals (RS) (only the demodulation reference signal (DMRS) is shown in the figure).

[0085] 2. PDCCH:

[0086] In mobile communication systems, the PDCCH is used to transmit DCI (Digital Downlink Control Channel). The signal carried on the PDCCH can be referred to as the PDCCH signal. In some embodiments, the PDCCH signal can be simply called PDCCH. In other words, PDCCH can refer to the Physical Downlink Control Channel, or it can refer to the signals transmitted on the Physical Downlink Control Channel.

[0087] Before transmitting PDCCH, network devices need to send PDCCH configuration (such as control resource set (CORESET) and search space (SS)) to terminal devices to configure relevant parameters for PDCCH transmission and assist terminal devices in receiving PDCCH.

[0088] 3. CORESET:

[0089] It is mainly used to configure the frequency domain resource information of the PDCCH (such as which RBs it occupies) and some time domain resource information (such as how many symbols it occupies). Network devices can configure one or more CORESETs for terminal devices. A CORESET can be associated with one or more SSs.

[0090] In some embodiments, the time-frequency domain resources corresponding to CORESET (such as one or more symbols, one or more RBs, etc.) can also be called CORESET. In other words, CORESET can be used to represent resources or configuration parameters of resources.

[0091] 4、SS (or search space set):

[0092] Mainly used to configure the time domain resource information of PDCCH, or used to configure the related information of PDCCH blind detection. Exemplarily, the search space set can include: time domain period (or blind detection period), indicating that the SS interval appears once every how many slots; monitoring opportunity (MO) in a slot, indicating the possible symbol position of PDCCH in a slot; aggregation level of PDCCH, indicating how many frequency domain resources are used to carry PDCCH, and the number of PDCCH candidates of each aggregation level, etc.

[0093] In some embodiments, the resource of SS configuration can also be referred to as SS. In other words, SS can be used to represent resources, and can also be used to represent configuration parameters of resources.

[0094] 5、MO:

[0095] One SS includes one or more MOs. In some embodiments, the SS is indicated by the monitoringSymbolsWithinSlot parameter. Among them, the monitoringSymbolsWithinSlot parameter is a 14-bit bitmap, and each bit corresponds to an orthogonal frequency division multiplexing (OFDM) symbol. The bit value of 1 indicates that the OFDM symbol corresponding to the bit is the first OFDM symbol of the SS, that is, the X OFDM symbols starting from the OFDM symbol correspond to an MO. X is indicated by the duration parameter in the CORESET, indicating the number of time domain symbols occupied by PDCCH. For example, the value of monitoringSymbolsWithinSlot is 10000100000000, and the value of duration in the associated CORESET is 3, then the search space has two MOs, the first one is located in the 1st-3rd OFDM symbol, and the second one is located in the 6th-8th OFDM symbol.

[0096] 6、candidate PDCCH (or potential PDCCH or alternative PDCCH):

[0097] is referred to as a resource location of a PDCCH that the network device can send, i.e., a resource location where a PDCCH can exist is referred to as a candidate PDCCH. The network device can send a PDCCH on a candidate PDCCH or can not send a PDCCH on a candidate PDCCH. The candidate PDCCH can be configured according to a set aggregation level. For example, the network device configures 2 candidate PDCCHs with an aggregation level of 4 and 4 candidate PDCCHs with an aggregation level of 8 for the terminal device, and the terminal device performs blind detection on the 2 candidate PDCCHs with an aggregation level of 4 and performs blind detection on the 4 candidate PDCCHs with an aggregation level of 8. The network device configures the candidate PDCCHs to control the number of blind detections of each aggregation level, thereby controlling the complexity of PDCCH blind detection. The time-frequency location of each candidate PDCCH of a specific aggregation level is calculated according to a specific formula, and the terminal device can determine the time-frequency location of each candidate PDCCH of a specific aggregation level, thereby performing PDCCH reception on the resource location.

[0098] The terms CORSET, SS, MO, and candidate PDCCH in this application are for convenience of description and are not limited to the literal meaning. For example, CORSET can generally refer to a configuration parameter of PDCCH frequency domain information, and can be replaced by any other term representing PDCCH frequency domain information. For example, SS can generally refer to a configuration parameter of PDCCH time domain information or PDCCH blind detection information, and can be replaced by any other term representing PDCCH time domain information or PDCCH blind detection information. For example, MO can generally refer to a configuration parameter of the time domain location of a PDCCH in a time slot, and can be replaced by any other term representing the time domain location of a PDCCH in a time slot. For example, candidate PDCCH can generally refer to a configuration parameter of a resource location where a PDCCH can exist, and can be replaced by any other term representing a resource location where a PDCCH can exist.

[0099] CORSET and its associated SS can determine all possible resource locations of a PDCCH, and the terminal device performs blind detection of the PDCCH on the resource locations.

[0100] 7. PDCCH blind detection:

[0101] is referred to as a method in which the terminal device attempts to receive a PDCCH at each resource location where a PDCCH can exist (i.e., each candidate PDCCH) by using a blind method. In this method, the terminal device iterates through each candidate PDCCH, and sequentially determines whether a PDCCH of the terminal device exists on a resource location corresponding to each candidate PDCCH, which is referred to as blind detection. It can be understood that the terminal device iterates through which candidate PDCCHs is configured by the network device in advance for the terminal device.

[0102] FIG. 3 is a schematic diagram of PDCCH configuration according to an embodiment of the present application. As shown in FIG. 3, the network device configures a control resource set for the terminal device, which is associated with two SSs (SS1 and SS2). There are 3 monitoring opportunities (MO1, MO2, and MO3) in SS1, and 4 monitoring opportunities (MO1, MO2, MO3, and MO4) in SS2, and there are 2 candidate PDCCHs on each MO. Therefore, there are actually 3x2=6 candidate PDCCHs in SS1, and 4x2=8 candidate PDCCHs in SS2.

[0103] When receiving the PDCCH, the terminal device sequentially traverses each candidate PDCCH in each MO to perform receiving processing such as descrambling, rate matching, decoding, CRC check, etc. If the decoding is successful, it indicates that the PDCCH of the terminal device actually exists on the MO, and if the decoding fails, it indicates that the PDCCH of the terminal device does not exist on the MO. According to the example given in FIG. 3, the terminal device needs to traverse 14 candidate PDCCHs to detect the PDCCH, which results in a large overhead of the terminal device.

[0104] Therefore, the present application provides a communication method and a communication device, which can reduce the overhead of the terminal device when performing PDCCH blind detection.

[0105] Hereinafter, the communication method according to an embodiment of the present application will be described with reference to the accompanying drawings.

[0106] For the convenience of understanding and description, the communication method according to an embodiment of the present application will be described below by taking the interaction between the network device and the terminal device as an example, but this should not constitute any limitation on the execution subject of the communication method according to an embodiment of the present application. For example, the method executed by the device (such as the network device and / or the terminal device) can also be executed by a module (such as a circuit, a chip, or a chip system, etc.) in the device, and can also be implemented by a logic node, a logic module, or software which can implement all or part of the functions of the device.

[0107] FIG. 4 is a schematic diagram of the interaction flow of a communication method according to an embodiment of the present application. As shown in FIG. 4, the method includes steps S401-S403.

[0108] S401: The terminal device receives a first signal from the network device (for example, a base station), wherein the first signal includes a data sub-signal and a pilot sub-signal (PS) corresponding to the data sub-signal; correspondingly, the network device transmits the first signal, and the time-frequency resources occupied by the transmission of the first signal are associated with a first time-frequency resource set, for example, the CORESET described above.

[0109] In a possible design, the data sub-signal can be referred to as a control discovery signal (CDS), which indicates that the terminal device can discover the PDCCH1, and the PDCCH1 indicates a specific PDCCH transmitted for the terminal device from all PDCCHs transmitted by the network device. The data sub-signal can be referred to as a control detection signal (CDS), which indicates that the terminal device can detect the PDCCH1. Of course, the specific name of the data sub-signal is merely an example, and embodiments of the present application do not limit the specific name of the data sub-signal.

[0110] For example, the pilot sub-signal can be a reference signal transmitted on the PDCCH, for example, the pilot sub-signal is a demodulation reference signal (DMRS) of the data sub-signal. Hereinafter, the pilot sub-signal is taken as the DMRS for example.

[0111] For example, the data sub-signal can be a user-level (or terminal device-level) signal. For example, the data sub-signal can be a sequence (for example, a CDS sequence). One user can correspond to one sequence or multiple different sequences. Alternatively, different users correspond to different sequences. Alternatively, different users can also correspond to the same sequence, for example, multiple terminal devices belong to the same user group, and all users in the user group can correspond to the same sequence. Alternatively, the terminal device can save the data sub-signal of the user corresponding to the terminal device.

[0112] In a possible design, before S401, the terminal device can further report information 1 (or capability information of the terminal device) (such as first information) to the network device, and the network device can distribute configuration information and the data sub-signal according to the information 1. The information 1 is used to indicate one or more of the following A to E:

[0113] A. Whether the terminal device supports PDCCH reception according to the data sub-signal, or whether the terminal device supports the data sub-signal, or whether the terminal device supports enabling the data sub-signal.

[0114] When the network device determines that the terminal device supports the data sub-signal, the parameter 1 indicates to enable the data sub-signal. When the network device determines that the terminal device does not support the data sub-signal, the parameter 1 indicates to not enable the data sub-signal.

[0115] In specific implementation, the terminal device can carry the parameter 2 (such as the third parameter) in the information 1 to indicate whether the terminal device supports the data sub-signal. There are various implementation manners of the parameter 2, and the following lists several possible examples:

[0116] The parameter 2 has two values, which respectively indicate that the data sub-signal is supported and the data sub-signal is not supported. For example, the parameter 2 is a bit, when the bit is 0, it indicates that the data sub-signal is supported, and when the bit is 1, it indicates that the data sub-signal is not supported; or, when the bit is 1, it indicates that the data sub-signal is supported, and when the bit is 0, it indicates that the data sub-signal is not supported.

[0117] The parameter 2 has only one value, which indicates that the data sub-signal is supported. In other words, as long as the parameter 2 is carried in the information 1, it indicates that the data sub-signal is supported, and when the parameter 2 is not carried in the information 1, it is defaulted to indicate that the data sub-signal is not supported.

[0118] The parameter 2 has only one value, which indicates that the data sub-signal is not supported. In other words, when the parameter 2 is not configured or the parameter 2 in the information 1 is empty, it is defaulted to indicate that the data sub-signal is supported; and when the parameter 2 is configured, it indicates that the data sub-signal is not supported.

[0119] Of course, the above three manners are only examples.

[0120] When the network device determines that the terminal device supports the data sub-signal through the information 1, the network device sends the configuration parameter of the data sub-signal and / or the data sub-signal to the terminal device.

[0121] B, the type of the data sub-signal supported by the terminal device;

[0122] C, the number of the type of the data sub-signal supported by the terminal device.

[0123] The network device sends the data sub-signal in the number range of the type of the data sub-signal supported by the terminal device. For example, the terminal device supports two types of data sub-signals, and the network device sends one or two types of data sub-signals to the terminal device.

[0124] D, whether the terminal device supports the association relationship between the data sub-signal and the resource 1.

[0125] E, the number of the data sub-signal supported by the terminal device.

[0126] The number of the data sub-signal supported by the terminal device can include that the terminal device supports receiving a maximum of how many data sub-signals, or the terminal device supports receiving a maximum of how many times of data sub-signals. For example, the number of the data sub-signal supported by the terminal device is 3, which indicates that the terminal device receives a maximum of 3 (or 3 times) data sub-signals, and the network device sends a maximum of 3 (or 3 times) data sub-signals (it can be understood that the types of the 3 data sub-signals can be the same or different, which is not limited) to the terminal device when sending the data sub-signal (or the data sub-signal corresponding to the terminal device).

[0127] In this way, the number of data sub-signals sent by the network device to the terminal device is within the receiving capability of the terminal device.

[0128] Through the above design, the network device sends the configuration parameters of the data sub-signals and the data sub-signals according to the information 1, which can improve the reliability of communication.

[0129] In a possible implementation, the terminal can further send first information to the network device before receiving the first signal, and correspondingly, the network device receives the first information; the first information includes configuration information associated with the first signal. The data sub-signals, the pilot sub-signals, and the association relationship therebetween in the present application will be described in detail in combination with the configuration information.

[0130] In the embodiments of the present application, the configuration information includes configuration parameters of the data sub-signals; or the configuration information includes configuration parameters, and the configuration parameters are used for configuring the data sub-signals; or the configuration information includes configuration parameters, and the configuration parameters are used for configuring the association between the data sub-signals and the PDCCH1, and the like.

[0131] In the embodiments of the present application, the data sub-signals are used for the terminal device to determine whether to receive the PDCCH1, including one or more of the following:

[0132] 1) The data sub-signals are used for determining (or indicating) whether the PDCCH1 exists;

[0133] 2) The data sub-signals are used for the terminal device to determine (or judge) whether the PDCCH1 sent to the terminal device exists;

[0134] 3) The data sub-signals are used for determining (or indicating) whether the network device has sent the PDCCH1;

[0135] 4) The data sub-signals are used for the terminal device to determine (or judge) whether the network device has sent the PDCCH1 to the terminal device;

[0136] 5) The data sub-signals are used for determining (or indicating) which resource positions have sent the PDCCH1;

[0137] 6) The data sub-signals are used for the terminal device to determine (or judge) which resource positions have sent the PDCCH1 to the terminal device by the network device;

[0138] 7) The data sub-signals are used for indicating whether the terminal device needs to perform PDCCH detection;

[0139] 8) The data sub-signals are used for indicating which resource positions (such as the resource positions associated with the data sub-signals) the terminal device needs to perform PDCCH detection;

[0140] 9) The data sub-signal is used for terminal device to discover the transmission of PDCCH1, etc.

[0141] In a possible embodiment, the configuration parameter of the data sub-signal comprises one or more of the following: parameter 1, the type of the data sub-signal (i.e. the type of the first signal), or the correspondence between the type of the data sub-signal and resource 1 (e.g. the first time-frequency resource set). The above configuration parameters are described below in combination with specific examples.

[0142] 1. Parameter 1, the parameter 1 is used to determine (or indicate) whether to enable or not to enable the data sub-signal; or, the parameter 1 is used to determine (or indicate) whether to perform PDCCH reception according to the data sub-signal; or, whether the terminal device supports the PDCCH reception mechanism based on CDS.

[0143] When the parameter 1 indicates to enable the data sub-signal, the terminal device needs to receive the data sub-signal first and then perform PDCCH1 reception (as shown in step S402 below); when the parameter 1 indicates not to enable the data sub-signal, the terminal device can not receive PDCCH1, or the terminal device can not receive PDCCH1 according to the data sub-signal, for example, can receive PDCCH1 in the manner of PDCCH blind detection, or the terminal device simultaneously receives the data sub-signal and PDCCH1 and buffers the two, and determines the detection manner of PDCCH1 according to the indication of the parameter 1.

[0144] 2. The type of the data sub-signal (i.e. the type of the first signal).

[0145] The type of the data sub-signal refers to the type of the data sub-signal adopted by the network device and / or the type of the data sub-signal allowed to be adopted by the terminal device.

[0146] In a possible embodiment, the type of the data sub-signal is distinguished according to the type of resource 1 associated with the data sub-signal. Wherein, the type of the data sub-signal (the first signal) has a correspondence with the time-frequency resource of the first time-frequency resource set.

[0147] The type of the data sub-signal includes but is not limited to one or more of the following:

[0148] A. The signal associated with CORESET. Wherein, the terminal device receives PDCCH1 in the CORESET associated with the data sub-signal.

[0149] B. The signal associated with SS. Wherein, the terminal device receives PDCCH1 in the SS associated with the data sub-signal.

[0150] C. The signal associated with MO. Wherein, the terminal device receives PDCCH1 in the MO associated with the data sub-signal.

[0151] D, the data sub-signal is associated with a candidate PDCCH. In the example, the terminal device receives PDCCH1 in the candidate PDCCH associated with the data sub-signal.

[0152] Of course, the above are only a few examples, and the actual embodiments are not limited thereto.

[0153] In one possible example, a standard or protocol or system specifies the type of data sub-signal, and the network device indicates in the configuration parameter whether to use the type of data sub-signal specified by the standard or protocol or system.

[0154] The type of data sub-signal is CORESET-associated signal as an example, but the content also applies to the scenario where the type of data sub-signal is SS-associated signal or MO-associated signal or candidate PDCCH-associated signal. For example, the standard specifies that the type of data sub-signal is CORESET-associated signal, and the network device carries a bit in the configuration parameter of the data sub-signal to indicate whether to use the CORESET-associated signal. For example, the bit is 0, indicating that the CORESET-associated signal is used, and the bit is 1, indicating that the CORESET-associated signal is not used; or the bit is 1, indicating that the CORESET-associated signal is used, and the bit is 0, indicating that the CORESET-associated signal is not used; or the configuration parameter of the data sub-signal carries the bit to indicate that the CORESET-associated signal is used, and the configuration parameter of the data sub-signal does not carry the bit to indicate that the CORESET-associated signal is not used; or the configuration parameter of the data sub-signal does not carry the bit to indicate that the CORESET-associated signal is used, and the configuration parameter of the data sub-signal carries the bit to indicate that the CORESET-associated signal is not used.

[0155] 3, the correspondence between the type of data sub-signal and resource 1 (such as the first time-frequency resource set).

[0156] The resource 1 includes at least one of the following: CORESET, SS, MO, and candidate PDCCH.

[0157] For example, the association between the above data sub-signal and resource 1 includes but is not limited to one or more of the following:

[0158] A, the association between the data sub-signal and the CORESET.

[0159] B, the association between the data sub-signal and the SS;

[0160] C, the association between the data sub-signal and the MO;

[0161] D, the association between the data sub-signal and the candidate PDCCH.

[0162] For the convenience of description, the association between the data sub-signal and the CORESET is taken as an example for description, and the content is also applicable to the association between the data sub-signal and the SS or the association between the data sub-signal and the MO or the association between the data sub-signal and the candidate PDCCH.

[0163] Exemplarily, the association between the data sub-signal and the CORESET is used to indicate that the type of the resource associated with the data sub-signal is the CORESET.

[0164] Optionally, the association between the data sub-signal and the CORESET can also be used to indicate which data sub-signals are associated with which CORESET. Wherein, one data sub-signal can be associated with one CORESET, one data sub-signal can also be associated with multiple CORESETs, or multiple data sub-signals can be associated with one CORESET, which is not limited.

[0165] The specific form of the association between the data sub-signal and the CORESET can be one or more CORESETs associated with the data sub-signal (for example, CDS-1 is associated with CORESET-1 and CORESET-2), or one or more control signals associated with the CORESET (for example, CORESET-1 is associated with CDS-1 and CDS-2), which is not limited by the embodiments of the present application. For example, the configuration information is used to configure CDS-1, and the configuration information carries the identifiers of the CORESETs associated with CDS-1, such as CORESET-1 and CORESET-2, indicating that CDS-1 is associated with CORESET-1 and CORESET-2. Or for example, the configuration information is used to configure CORESET-1, and the configuration information carries the identifiers of the data sub-signals associated with CORESET-1, such as CDS-1 and CDS-2, indicating that CORESET-1 is associated with CDS-1 and CDS-2.

[0166] The association between the data sub-signal and the resource 1 includes any one of A, B, C and D or a combination of A, B, C and D. When there are multiple associations between the data sub-signal and the resource 1, this can indicate that the resource 1 includes multiple types, for example, the association between the data sub-signal and the resource 1 includes the association between the data sub-signal and CORESET-1, the association between the data sub-signal and SS-1, and the association between the data sub-signal and MO-1 and MO-2. The resource 1 includes CORESET-1, SS1, MO-1 and MO-2.

[0167] Exemplarily, the resource 1 is associated with PDCCH1. In this way, the PDCCH1 associated with the data sub-signal can be determined according to the association between the data sub-signal and the resource 1 and the association between the resource 1 and the PDCCH1.

[0168] When the configuration parameter of the data sub-signal includes both the type of the data sub-signal and the association relationship between the data sub-signal and the resource 1, the type of the data sub-signal and the association relationship between the data sub-signal and the resource 1 are corresponding (or matched). For example, the type of the data sub-signal is a CORSET-associated signal, and the resource 1 is a CORSET; for example, the type of the data sub-signal is a SS-associated signal, and the resource 1 is a SS; for example, the type of the data sub-signal is a MO-associated signal, and the resource 1 is a MO; for example, the type of the data sub-signal is a candidate PDCCH-associated signal, and the resource 1 is a candidate PDCCH.

[0169] The parameter 1, the type of the data sub-signal, and the association relationship between the data sub-signal and the resource 1 do not necessarily exist simultaneously in the configuration parameter of the data sub-signal. For example, the system defaults or standards stipulate that the data sub-signal is enabled, and the configuration parameter of the data sub-signal can not carry the parameter 1; for example, the system defaults or standards stipulate the type of the data sub-signal, and the configuration parameter of the data sub-signal can not carry the type of the data sub-signal; for example, the system defaults or standards stipulate the resource associated with each type of data sub-signal, and the configuration parameter of the data sub-signal can not carry the association relationship between the data sub-signal and the resource 1, and the like.

[0170] When the type of the data sub-signal is a CORSET-associated signal, the network device transmits the data sub-signal according to the granularity of the CORSET, for example, transmits one data sub-signal corresponding to one or more CORSETs, and the PDCCH1 exists in the one or more CORSETs. This can reduce the overhead relative to the other types of data sub-signals.

[0171] When the type of the data sub-signal is a candidate PDCCH-associated first signal, the network device transmits the data sub-signal according to the granularity of the candidate PDCCH, for example, transmits one data sub-signal corresponding to one or more candidate PDCCHs, and the PDCCH1 exists in the one or more candidate PDCCHs. This can reduce the number of PDCCH detections relative to the other types of data sub-signals.

[0172] Exemplarily, the configuration information can also carry a resource configuration parameter, which is used to configure the resource of the PDCCH. The PDCCH resource configuration parameter includes, but is not limited to, one or more of CORSET, SS, MO, candidate PDCCH, and the like. In a specific implementation, the network device configures one or more CORSETs and one or more SSs for the terminal device. The description of the relationship between the CORSET and the SS can be referred to the description of the aforementioned terms, and will not be described here.

[0173] Exemplarily, the configuration information is a radio resource control (RRC) message (or RRC signaling), or the configuration information is carried in the RRC message (or RRC signaling).

[0174] In a possible implementation, the network device can further send, to the terminal device, second information before sending the first signal, and the terminal device receives the second information; the second information includes the configuration information associated with the first signal, and the content of the configuration information can be, for example, referred to the configuration information in the first information.

[0175] Exemplarily, the network device carries an identifier of the type of the data sub-signal adopted in the configuration parameter of the data sub-signal, for example, per CORESET CDS, per Search Space CDS, per Monitoring occasion CDS, and per PDCCH candidate CDS respectively represent a CORESET-associated signal, an SS-associated signal, an MO-associated signal, or a candidate PDCCH-associated signal.

[0176] Exemplarily, the network device carries a bitmap in the configuration parameter of the data sub-signal, each bit of the bitmap corresponds to a type of the data sub-signal, and the value of each bit is used to indicate whether to adopt the type of the data sub-signal corresponding to the bit. Taking an example in which the bitmap includes four bits, the first bit to the fourth bit respectively correspond to a CORESET-associated signal, an SS-associated signal, an MO-associated signal, and a candidate PDCCH-associated signal, and the value of each bit is 1, indicating adoption, or 0, indicating non-adoption. For example, the bitmap is "1100", indicating that the types of the data sub-signals adopted are the CORESET-associated signal and the MO-associated signal.8

[0177] Exemplarily, the configuration information can further include a first field in the high-layer signaling of the network device, and the first field configures whether to enable the PDCCH receiving mechanism based on the data sub-signal.

[0178] Exemplarily, the configuration information can further include a second field in the high-layer signaling of the network device, and the second field configures the type field of the data sub-signal enabled by the network device.

[0179] In a possible implementation, before sending the first signal, the network device can further send third information to the terminal device, and the terminal device receives the third information. The third information can be sent together with the second information, i.e., the second information includes the third information, or the third information includes the second information, or the third information is sent separately. The third information includes configuration information of the first signal, and the configuration information of the first signal specifically includes at least one of the following information: frequency domain density, offset, time domain length occupied by the data sub-signal, or sequence length of the data sub-signal; the terminal device determines the length of the pilot sub-signal according to the configuration information of the first signal, or the configuration information of the first signal further includes the length of the pilot sub-signal, the length of the pilot sub-signal is determined by the network device, or the terminal device determines the length of the pilot sub-signal according to the received configuration information of the first signal; the length of the pilot sub-signal can be determined according to the following formula:

[0180] wherein, L DMRS is the length of the pilot sub-signal, L CDS is the time domain length occupied by the data sub-signal or the sequence length of the data sub-signal, L CDS may be 127, or dynamically configured by the network device, is the number of time domain symbols occupied by the data sub-signal, is the frequency domain density, and offset is the offset, which indicates the starting position of the pilot sub-signal, represents rounding down, represents rounding down.

[0181] The time-frequency resource occupied by the first signal includes a first frequency domain resource, the number of frequency domain units (i.e., the RE described above) included in the first frequency domain resource is related to the length of the first signal, and the length of the first signal is the sum of the length of the data sub-signal and the length of the pilot sub-signal, i.e., L DMRS + L CDS .

[0182] Of course, the above are only some examples, and the actual implementation is not limited thereto.

[0183] Through the design, the behavior of the network device and the behavior of the terminal device can be ensured to correspond to each other, and the reliability of communication between the network device and the terminal device can be improved.

[0184] Step S402: The network device sends a first time-frequency resource set.

[0185] When the network device is implemented through multiple RAN nodes, for example, the network device is a network device in an ORAN system, the network device sends the first time-frequency resource set, specifically, one of the O-CU, O-DU and O-RU can send the first time-frequency resource set, or multiple of the O-CU, O-DU and O-RU jointly send the first time-frequency resource set.

[0186] Wherein, the network device sending the first time-frequency resource set can be sending the first time-frequency resource set to one terminal device or sending the first time-frequency resource set to multiple terminal devices. Or, the network device sending the first time-frequency resource set includes the first time-frequency resource set corresponding to one terminal device or the first time-frequency resource set corresponding to multiple terminal devices. The number of first time-frequency resource sets sent by the network device to each terminal device can be one or more, without limitation.

[0187] The first time-frequency resource set includes multiple PDCCHs, which are candidate PDCCHs. The time-frequency domain position associated with the candidate PDCCH can carry a first signal. The first signal on the time-frequency domain position associated with different candidate PDCCHs can be different, for example, different first signals correspond to different terminals, and the terminal will only detect or blindly detect the first time-frequency resource set when detecting the corresponding first signal. One or more PDCCHs associated with the first signal correspond to the target terminal, referred to as PDCCH1.

[0188] The PDCCH1 associated with the first signal refers to the PDCCH1 corresponding to the resource1 associated with the first signal. For example, the PDCCH1 associated with the first signal includes one or more of the following: PDCCH1 corresponding to the CORSET(s) associated with the first signal, PDCCH1 corresponding to the SS(s) associated with the first signal, PDCCH1 corresponding to the MO(s) associated with the first signal, PDCCH1 corresponding to the candidate PDCCH(s) associated with the first signal, etc.

[0189] Step S403: determining whether to detect a physical downlink control channel PDCCH in the first time-frequency resource set according to the detection result of the data sub-signal, i.e., the data sub-signal is used to determine whether to detect the PDCCH in the first time-frequency resource set.

[0190] For example, when there is no PDCCH corresponding to the terminal in the first time-frequency resource set received by the terminal, i.e., the first signal on the time-frequency domain position associated with the candidate PDCCH in the first time-frequency resource set does not correspond to the terminal, the terminal fails to detect the data sub-signal in the first time-frequency resource, at this time, the terminal does not detect the PDCCH in the first time-frequency resource set.

[0191] Exemplarily, when the first signal corresponding to the terminal exists in the first time-frequency resource set received by the terminal, that is, the first signal corresponding to the terminal exists in the time-frequency domain position associated with one or more candidate PDCCHs in the first time-frequency resource set, the terminal regards the detection result of the data sub-signal in the first time-frequency resource as successful, and the terminal detects the PDCCH in the first time-frequency resource set.

[0192] For example, taking the type of the first signal as an MO-associated signal as an example, the first time-frequency resource set includes multiple MOs, for example, MO1, MO2,..., MOa (a is a positive integer greater than 1), wherein the MO1 includes multiple candidate PDCCHs, one of which is the PDCCH1 corresponding to the terminal receiving the first time-frequency resource set, and the time-frequency domain position associated with the MO1 (for example, the same time domain as the MO1 and the frequency domain adjacent to the MO1) carries the first signal corresponding to the terminal. The time-frequency domain positions associated with the MOs other than the MO1 in the first time-frequency resource set do not carry the first signal corresponding to the terminal. The terminal detects the position where the first signal may exist, and when the first signal corresponding to the terminal is detected, the multiple candidate PDCCHs in the MO corresponding to the first signal are detected or blindly detected to receive the PDCCH1.

[0193] In order to illustrate how the present application determines whether to detect the PDCCH in the first time-frequency resource set according to the detection result of the data sub-signal, FIG. 5 shows a time-frequency domain resource diagram disclosed by at least one embodiment of the present application, which is described below in conjunction with FIG. 5.

[0194] As shown in FIG. 5, the first time-frequency resource set sent by the network device includes an SS (SS1 in the figure), and the SS1 includes multiple MOs (only two, MO1 and MO2, are shown in the figure), wherein the MO1 and the MO2 each occupy three time domain symbols. The first signal occupies the same time domain symbols as the MO1 (i.e., the above-mentioned The first time-frequency resource set includes a second frequency domain resource, the number of frequency domain units between the first frequency domain resource occupied by the first signal and the second frequency domain resource is 0 in the figure, the starting RB of the first signal is located behind the last RB of the MO1, the pilot sub-signals are distributed in a discrete form on the first time domain symbol of the data sub-signal, the position and offset of the first pilot sub-signal are related in the figure, the interval between the positions of the pilot sub-signals is related to the above-mentioned frequency domain density, and the discrete form may satisfy the following formula, for example: Last k=(nk'+offset)+(n k'=0,1…L-1

[0195] k is the position of the pilot sub-signal in the RB corresponding to the first signal, n is the frequency domain density, andLast L is the length of the pilot sub-signal.

[0196] In the embodiments of the present application, the pilot sub-signal is used to improve the detection accuracy of the data sub-signal. Taking the type of the first signal as an example, the terminal detects the data sub-signal on each MO after receiving the first time-frequency resource set, and if the data sub-signal is detected, the terminal detects the PDCCH in the first time-frequency resource set; or if the data sub-signal is not detected, the terminal does not detect the PDCCH in the first time-frequency resource set. For example, after successfully detecting the data sub-signal on MO1, the terminal performs blind detection on all candidate PDCCHs corresponding to MO1 to determine whether there is a corresponding PDCCH.

[0197] Through the above method, blind detection on all candidate PDCCHs in the first time-frequency resource set can be avoided, the complexity of blind detection is reduced, and resource waste is avoided.

[0198] It should be noted that the time-frequency domain resource diagram shown in FIG. 5 is only one possible implementation, and cannot be used as a limitation on the present application. For example, the pilot sub-signal is located at the first position of the data sub-signal.

[0199] For example, the pilot sub-signal can be distributed in the range corresponding to the first position in a discrete form as shown in FIG. 5, that is, on the first time domain symbol in the time domain symbol occupied by the data sub-signal.

[0200] For another example, the pilot sub-signal occupies part or all of the first time domain symbol in a continuous form.

[0201] For another example, the range corresponding to the first position is the second time domain symbol or other possible time domain symbol occupied by the data sub-signal.

[0202] For another example, the time-frequency resource occupied by the first signal includes a first time domain resource, the first time-frequency resource set includes a second time domain resource, the first time domain resource is the same as the second time domain resource, or part of the first time domain resource is the same as the second time domain resource. For example, the number of time domain symbols occupied by the first signal can be different from the MO. For example, the first signal can occupy 4 time domain symbols or 2 time domain symbols in FIG. 5.

[0203] For another example, the number of frequency domain units between the first frequency domain resource and the second frequency domain resource is less than or equal to a first threshold. For example, the number of frequency domain units between the first frequency domain resource and the second frequency domain resource occupied by the first signal is less than or equal to 5. For another example, the last RB of the first signal in FIG. 5 can be located in front of the starting RB of MO1.

[0204] In some embodiments, the resource position of the data sub-signal can be pre-configured (the time-frequency resource of the data sub-signal can be configured by the network device, for example, the resource position of the data sub-signal is indicated in the resource configuration parameter, or the resource position of the data sub-signal is specified by the standard or protocol, etc., without limitation), and the process in which the terminal device receives the data sub-signal according to the configuration parameter of the data sub-signal can include:

[0205] For example, the terminal device detects the data sub-signal at all possible resource positions of the data sub-signal;

[0206] If the data sub-signal is detected at any resource position, the data sub-signal is matched (or detected) with the corresponding data sub-signal of the terminal device (such as the data sub-signal saved by the terminal device);

[0207] According to the correlation matching result, it is determined whether the received data sub-signal is the data sub-signal corresponding to the terminal device. If the correlation matching is successful, for example, the correlation value exceeds the threshold, it indicates that the received data sub-signal corresponds to the terminal device, and the terminal device successfully receives the data sub-signal. If the correlation matching fails, for example, the correlation value does not exceed the threshold, it indicates that the received data sub-signal does not correspond to the terminal device, and the terminal device fails to receive the data sub-signal.

[0208] For example, the terminal device detects a first data sub-signal at resource position 1 and a second data sub-signal at resource position 2, and the terminal device matches the first data sub-signal and the second data sub-signal with the corresponding CDS of the terminal device, respectively. The matching result is that the first data sub-signal corresponds to the terminal device, and the second data sub-signal does not correspond to the terminal device, so the terminal device successfully receives the first data sub-signal and fails to receive the second data sub-signal.

[0209] After the terminal device receives the data sub-signal, the terminal device determines whether to perform PDCCH reception (or detection or blind detection) according to the reception condition (success or failure) of the data sub-signal, or determines which resources need to perform PDCCH reception (or detection or blind detection).

[0210] In some embodiments, the PDCCH1 associated with the data sub-signal refers to the PDCCH1 corresponding to the resource 1 associated with the data sub-signal. When the configuration parameter of the data sub-signal includes the association relationship between the data sub-signal and the resource 1, the terminal device can receive the PDCCH1 according to the configuration parameter of the data sub-signal. For example, taking the resource 1 as the CORSET, the terminal device receives the PDCCH1 in the CORSET associated with the data sub-signal according to the association relationship between the data sub-signal and the CORSET.

[0211] By introducing the data sub-signal, the terminal device can determine whether the network device sends the PDCCH1 to the terminal device according to the data sub-signal, which can avoid the terminal device from traversing all possible resource positions to the PDCCH, thereby reducing the overhead of the terminal device for PDCCH blind detection.

[0212] By introducing the pilot sub-signal, the success rate of the terminal device in detecting the data sub-signal is improved, and the anti-interference ability of the first signal is improved.

[0213] It should be noted that the above-mentioned multiple embodiments can be combined, and the combined scheme is implemented. Optionally, some operations in the flow of each method embodiment are optionally combined, and / or the order of some operations is optionally changed. Moreover, the execution order between the steps of each flow is only exemplary, and does not constitute a limitation on the execution order between the steps, and other execution orders between the steps can also be used. The execution order is not intended to indicate the only order in which the operations can be performed. A person of ordinary skill in the art can think of various ways to reorder the operations herein. In addition, it should be pointed out that the process details related to some embodiments herein are also applicable in a similar manner to other embodiments, or different embodiments can be combined for use.

[0214] FIG. 6 is a structural schematic diagram of a communication apparatus provided in the present application. The communication apparatus can be used to implement any possible function in the above-mentioned method embodiments, and thus can also achieve the beneficial effects possessed by the above-mentioned method embodiments.

[0215] As shown in FIG. 6, the communication apparatus 600 includes a processing unit 610.

[0216] In a possible implementation, the communication apparatus 600 can further include a transceiver unit 620.

[0217] In a possible implementation, the communication apparatus 600 can further include a storage unit 630.

[0218] In a possible implementation, the communication apparatus 600 can further include the transceiver unit 620 and the storage unit 630.

[0219] When the communication apparatus 600 is configured to implement the functions of the terminal as described above, the transceiver 620 is configured to receive a first signal, where the first signal comprises a data sub-signal and a pilot sub-signal corresponding to the data sub-signal, and the time-frequency resources occupied by the first signal are associated with the first time-frequency resource set. The processing unit 610 is configured to determine whether a physical downlink control channel (PDCCH) is detected within the first time-frequency resource set according to a detection result of the data sub-signal. The storage unit 630 is configured to store any data, computer instructions and / or computer programs that can be involved in the embodiments of the present application. For more detailed description of the processing unit 610 and the transceiver 620, reference can be made to the related description in the method embodiment shown in FIG. 4.

[0220] In a possible implementation, the pilot sub-signal is located at the first position of the data sub-signal.

[0221] In a possible implementation, the pilot sub-signal is distributed in a discrete form within the range corresponding to the first position.

[0222] In a possible implementation, the time-frequency resources occupied by the first signal comprise first time-domain resources, the first time-frequency resource set comprises second time-domain resources, the first time-domain resources are the same as the second time-domain resources, or the first time-domain resources are partially the same as the second time-domain resources.

[0223] In a possible implementation, the time-frequency resources occupied by the first signal comprise first frequency-domain resources, the first time-frequency resource set comprises second frequency-domain resources, and the number of frequency-domain units spaced between the first frequency-domain resources and the second frequency-domain resources is less than or equal to a first threshold.

[0224] In a possible implementation, the number of frequency-domain units contained in the first frequency-domain resources is related to the length of the first signal.

[0225] In a possible implementation, the number of frequency-domain units contained in the first frequency-domain resources is related to the length of the first signal, including that the length of the first signal is the sum of the length of the data sub-signal and the length of the pilot sub-signal.

[0226] In a possible implementation, the transceiver 620 is further configured to receive configuration information of the first signal; where the configuration information comprises at least one of the following information: frequency-domain density, offset, time-domain length occupied by the data sub-signal, or sequence length of the data sub-signal, or the configuration information further comprises the length of the pilot sub-signal; and the processing unit 610 is further configured to determine the length of the pilot sub-signal according to the configuration information.

[0227] In a possible implementation, the pilot sub-signal is distributed in a discrete form within the range corresponding to the first position, and the following formula is satisfied: k = (nk' + offset) + (n Last*12) +1 k' = 0,1...L PS -1

[0228] wherein k is the position of the pilot sub-signal, n is the frequency domain density, L PS is the length of the pilot sub-signal, offset is the offset, and n Last is the end position of the frequency domain resource corresponding to the first time-frequency resource set.

[0229] In a possible implementation, the transceiver 620 is further configured to send the first information, wherein the first information indicates a type of the first signal supported by the terminal, and the type of the first signal has a corresponding relationship with the time-frequency resource of the first time-frequency resource set.

[0230] In a possible implementation, the transceiver 620 is further configured to receive the second information, wherein the second information indicates a type of the first signal used by the network device, and the type of the first signal has a corresponding relationship with the time-frequency resource of the first time-frequency resource set.

[0231] In a possible implementation, the time-frequency resource of the first time-frequency resource set includes any one of the following: a control resource set, a search space, a listening occasion, or a candidate PDCCH.

[0232] In a possible implementation, the processing unit 610 is further configured to: if the detection on the data sub-signal is successful, detect the PDCCH in the first time-frequency resource set; or if the detection on the data sub-signal fails, not detect the PDCCH in the first time-frequency resource set.

[0233] When the communication apparatus 600 is configured to implement the functions of the network device as described above, the transceiver 620 is configured to send the first signal, wherein the time-frequency resource occupied by the first signal is associated with the first time-frequency resource set, the first signal includes a data sub-signal and a pilot sub-signal corresponding to the data sub-signal; send the first time-frequency resource set; and the data sub-signal is used to determine whether to detect the PDCCH in the first time-frequency resource set.

[0234] In a possible implementation, the pilot sub-signal is located at a first position of the data sub-signal.

[0235] In a possible implementation, the pilot sub-signal is located at a first position of the data sub-signal, including: the pilot sub-signal is distributed in a discrete form within a range corresponding to the first position.

[0236] In a possible implementation, the time-frequency resource occupied by the first signal includes a first time domain resource, the first time-frequency resource set includes a second time domain resource, the first time domain resource is the same as the second time domain resource, or part of the first time domain resource is the same as the second time domain resource.

[0237] In a possible implementation, the time-frequency resource occupied by the first signal includes a first frequency domain resource, the first set of time-frequency resources includes a second frequency domain resource, and a quantity of frequency domain units spaced between the first frequency domain resource and the second frequency domain resource is less than or equal to the first threshold.

[0238] In a possible implementation, a quantity of frequency domain units contained in the first frequency domain resource is related to a length of the first signal.

[0239] In a possible implementation, the length of the first signal is a sum of a length of the data sub-signal and a length of the pilot sub-signal.

[0240] In a possible implementation, the processing unit 610 is further configured to determine configuration information of the first signal, and the configuration information includes at least one of the following information: a frequency domain density, an offset, a time domain length occupied by the data sub-signal, or a sequence length of the data sub-signal.

[0241] In a possible implementation, the processing unit 610 is further configured to determine a length of the pilot sub-signal.

[0242] In a possible implementation, the transceiver unit 620 is further configured to receive first information, where the first information indicates a type of the first signal supported by the terminal, and the type of the first signal has a corresponding relationship with a time-frequency resource of the first set of time-frequency resources.

[0243] In a possible implementation, the transceiver unit 620 is further configured to send second information, where the second information indicates a type of the first signal used by the network device, and the type of the first signal has a corresponding relationship with a time-frequency resource of the first set of time-frequency resources.

[0244] In a possible implementation, the time-frequency resource of the first set of time-frequency resources includes any one of the following: a control resource set, a search space, a listening occasion, or a candidate PDCCH.

[0245] In a possible implementation, the pilot sub-signal is a demodulation reference signal of the data sub-signal.

[0246] Optionally, the transceiver unit 620 can be a transceiver, which can include an antenna and a radio frequency circuit and the like.

[0247] The processing unit 610 can be a processor (or, processing circuitry), for example, a baseband processor, which can include one or more CPUs.

[0248] FIG. 7 is a structural schematic diagram of a communication apparatus provided in the present application. The communication apparatus can be used to implement any possible function in the above method embodiments, and thus can also achieve the beneficial effects possessed by the above method embodiments.

[0249] As shown in FIG. 7, the communication apparatus 700 includes at least one processor 710. In a possible implementation, the communication apparatus 700 can further include interface circuit 720.

[0250] In a possible implementation, the communication apparatus 700 can further include a memory 730.

[0251] In a possible implementation, the communication apparatus 700 can further include a memory 730 and the interface circuit 720.

[0252] In some embodiments, the processor 710 and the memory 730 are coupled to each other; and / or, the processor 710 and the interface circuit 720 are coupled to each other. It can be understood that the interface circuit 720 can be a transceiver or an input / output interface. The memory 730 can be used to store computer instructions executed by the processor 710 or store input data required by the processor 710 to run the computer instructions or store data generated after the processor 710 runs the computer instructions.

[0253] The communication apparatus shown in FIG. 6 and FIG. 7 is only an example, and in actual applications, the communication apparatus can have more or less components than those shown in FIG. 6 and FIG. 7, can combine two or more components, or can have a different component configuration, and in FIG. 6, the processing unit can also be referred to as a processing module, a processor; the transceiving unit can also be referred to as a transceiving module, a transceiver; and the storage unit can also be referred to as a storage module, a memory.

[0254] FIG. 8 is a schematic diagram of a communication system according to at least one embodiment of the present application. As shown in FIG. 8, the communication system 80 includes a terminal 81 and a network device 82, wherein the terminal device 81 is configured to perform functions performed by the terminal device in the methods described above, and the network device 82 is configured to perform functions performed by the network device in the methods described above.

[0255] In the embodiments of the present application, the communication apparatus 600 can be the terminal 81 shown in FIG. 8, and can also be a module (such as a chip) applied to the terminal 81, or the communication apparatus 600 can be the network device 82 shown in FIG. 8, and can also be a module (such as a chip) applied to the network device 82.

[0256] It can be understood that the processor in the embodiments of the present application can be a central processing unit (CPU), and can also be other general-purpose processors, digital signal processors (DSP), application specific integrated circuits (ASIC), field programmable gate arrays (FPGA) or other programmable logic devices, transistor logic devices, hardware components or any combination thereof. The general-purpose processor can be a microprocessor or any conventional processor.

[0257] The method steps in the embodiments of the present application can be implemented in hardware or in software instructions executable by a processor. The software instructions can be composed of corresponding software modules, and the software modules can be stored in a random access memory, a flash memory, a read-only memory, a programmable read-only memory, an erasable programmable read-only memory, an electrically erasable programmable read-only memory, a register, a hard disk, a mobile hard disk, a CD-ROM or any other form of storage medium well known in the art. An exemplary storage medium is coupled to the processor, so that the processor can read information from the storage medium and write information to the storage medium. The storage medium can also be an integral part of the processor. The processor and the storage medium can be located in an ASIC. In addition, the ASIC can be located in a network device or a terminal. The processor and the storage medium can also exist as discrete components in the network device or the terminal.

[0258] In the above embodiments, all or part of the embodiments can be implemented by software, hardware, firmware or any combination thereof. When implemented by software, all or part of the embodiments can be implemented in the form of a computer program product. The computer program product includes one or more computer programs or instructions. When the computer programs or instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments are performed. The computer can be a general purpose computer, a special purpose computer, a computer network, a network device, a user equipment or other programmable apparatus. The computer programs or instructions can be stored in a computer readable storage medium or transferred from one computer readable storage medium to another computer readable storage medium, for example, the computer programs or instructions can be transferred from one website site, computer, server or data center to another website site, computer, server or data center through wired or wireless manner. The computer readable storage medium can be any available medium accessible by a computer or a data storage device such as a server, data center and the like integrated with one or more available media. The available media can be a magnetic medium, for example, a floppy disk, a hard disk, a magnetic tape; an optical medium, for example, a digital video disc; and a semiconductor medium, for example, a solid state disk. The computer readable storage medium can be a volatile or non-volatile storage medium, or can include both volatile and non-volatile storage media.

[0259] In various embodiments of the embodiments of the present application, the terms and / or descriptions of different embodiments are consistent and can be mutually referred to if there is no special description and logical conflict, and the technical features in different embodiments can be combined to form new embodiments according to their inherent logical relationship.

[0260] It can be understood that various numerical numbers involved in the embodiments of the present application are only used for differentiation for convenience of description, and are not used to limit the scope of the embodiments of the present application. The size of the serial number of the above processes does not mean the execution order, and the execution order of the processes should be determined according to their functions and inherent logic.

Claims

1. A communication method characterized by comprising: The method comprises: receiving a first signal, wherein the first signal comprises a data sub-signal and a pilot sub-signal corresponding to the data sub-signal, and time-frequency resources occupied by the first signal are associated with a first time-frequency resource set; determining whether to detect a physical downlink control channel (PDCCH) in the first time-frequency resource set according to a detection result of the data sub-signal.

2. The method of claim 1, wherein, The pilot sub-signal is located at a first position of the data sub-signal.

3. The method of claim 2, wherein, The pilot sub-signal is located at the first position of the data sub-signal, comprising: the pilot sub-signal is distributed in a discrete form in a range corresponding to the first position.

4. The method of claim 1, wherein, The time-frequency resources occupied by the first signal comprise a first time domain resource, and the first time-frequency resource set comprises a second time domain resource, the first time domain resource being the same as the second time domain resource, or the first time domain resource being partially the same as the second time domain resource.

5. The method of claim 1, wherein, The time-frequency resources occupied by the first signal comprise a first frequency domain resource, and the first time-frequency resource set comprises a second frequency domain resource, a number of frequency domain units spaced between the first frequency domain resource and the second frequency domain resource being less than or equal to a first threshold.

6. The method of claim 5, wherein, The number of frequency domain units contained in the first frequency domain resource is related to the length of the first signal.

7. The method of claim 6, wherein, The number of frequency domain units contained in the first frequency domain resource is related to the length of the first signal, comprising: the length of the first signal is the sum of the length of the data sub-signal and the length of the pilot sub-signal.

8. The method of claim 3, wherein, The method further comprises: receiving configuration information of the first signal; wherein the configuration information comprises at least one of the following information: frequency domain density, offset, time domain length occupied by the data sub-signal, or sequence length of the data sub-signal, or the configuration information further comprises the length of the pilot sub-signal; determining the length of the pilot sub-signal according to the configuration information.

9. The method of claim 3, wherein, The pilot sub-signals are distributed in discrete form in the range corresponding to the first position, satisfying the following formula: k = (nk' + offset) + (n Last *12) + 1 k' = 0, 1...L PS -1 Wherein, k is the position of the pilot sub-signal in the first position corresponding range, n is the frequency domain density, L PS is the length of the pilot sub-signal, offset is the offset, n Last is the end position of the frequency domain resource corresponding to the first time-frequency resource set.

10. The method of claim 1, wherein, The method further comprises: sending first information, wherein the first information indicates a type of the first signal supported by a terminal, and the type of the first signal has a corresponding relationship with time-frequency resources of the first time-frequency resource set.

11. The method of claim 1, wherein, The method further comprises: receiving second information, wherein the second information indicates a type of the first signal used by a network device, and the type of the first signal has a corresponding relationship with time-frequency resources of the first time-frequency resource set.

12. The method of claim 1, wherein, The time-frequency resources of the first time-frequency resource set comprise any one of the following: a control resource set, a search space, a listening opportunity, or a candidate PDCCH.

13. The method of claim 1, wherein, The determination of whether to detect a PDCCH in the first time-frequency resource set according to the detection result of the data sub-signal comprises: if the data sub-signal is detected, detecting a PDCCH in the first time-frequency resource set; or if the data sub-signal is not detected, not detecting a PDCCH in the first time-frequency resource set.

14. The method of any one of claims 1-13, wherein, The pilot sub-signal is a demodulation reference signal of the data sub-signal.

15. A method of communication, comprising: The method comprises: sending a first signal, wherein time-frequency resources occupied by the first signal are associated with a first time-frequency resource set, and the first signal comprises a data sub-signal and a pilot sub-signal corresponding to the data sub-signal; transmitting the first set of time-frequency resources; the data sub-signal is used to determine whether a physical downlink control channel (PDCCH) is detected in the first set of time-frequency resources.

16. The method of claim 15, wherein, the pilot sub-signal is located at a first position of the data sub-signal.

17. The method of claim 16, wherein, the pilot sub-signal is located at a first position of the data sub-signal, including that the pilot sub-signal is distributed in a discrete form in a range corresponding to the first position.

18. The method of claim 15, wherein, the time-frequency resources occupied by the first signal include a first time domain resource, and the first set of time-frequency resources includes a second time domain resource, the first time domain resource being the same as the second time domain resource, or the first time domain resource being partially the same as the second time domain resource.

19. The method of claim 15, wherein, the time-frequency resources occupied by the first signal include a first frequency domain resource, and the first set of time-frequency resources includes a second frequency domain resource, a number of frequency domain units spaced between the first frequency domain resource and the second frequency domain resource being less than or equal to a first threshold.

20. The method of claim 19, wherein, a number of frequency domain units included in the first frequency domain resource is related to a length of the first signal.

21. The method of claim 20, wherein, a number of frequency domain units included in the first frequency domain resource is related to a length of the first signal, including that the length of the first signal is a sum of a length of the data sub-signal and a length of the pilot sub-signal.

22. The method of claim 15, wherein, the method further includes: determining configuration information of the first signal; the configuration information includes at least one of the following information: frequency domain density, offset, time domain length occupied by the data sub-signal, or sequence length of the data sub-signal.

23. The method of claim 22, wherein, the method further includes: determining a length of the pilot sub-signal.

24. The method of claim 15, wherein, the method further includes: receiving first information, wherein the first information indicates a type of the first signal supported by the terminal, and the type of the first signal has a corresponding relationship with time-frequency resources of the first set of time-frequency resources.

25. The method of claim 15, wherein, the method further includes: transmitting second information, wherein the second information indicates a type of the first signal used by the network device, and the type of the first signal has a corresponding relationship with time-frequency resources of the first set of time-frequency resources.

26. The method of claim 15, wherein, the time-frequency resources of the first set of time-frequency resources include any one of the following: a control resource set, a search space, a listening opportunity, or a candidate PDCCH.

27. The method of any one of claims 15-26, wherein, the pilot sub-signal is a demodulation reference signal of the data sub-signal.

28. A communications device, characterized by including a unit for performing the method of any one of claims 1 to 14, or a unit for performing the method of any one of claims 15 to 27.

29. A communications device, characterized by including: at least one processor configured to invoke computer instructions in a memory to cause the communication device to perform the method of any one of claims 1 to 14 or any one of claims 15 to 27.

30. A computer-readable storage medium, characterized in that, the computer readable storage medium stores instructions or programs, when the instructions or programs run on the communication device, implement the method of any one of claims 1 to 14 or any one of claims 15 to 27.

31. A computer program product, characterised in that, the computer program product includes a computer program or instructions, when the computer program or instructions run on a computer, cause the computer to perform the method of any one of claims 1 to 14 or any one of claims 15 to 27.

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