Receiving method and sending method for pdcch, device, and storage medium

Abstract

A receiving method and a sending method for a PDCCH, a device, and a storage medium, belonging to the technical field of mobile communications. The method is executed by a terminal device and comprises: on the basis of a candidate PDCCH set, receiving a PDCCH, the PDCCH corresponding to one candidate PDCCH or a plurality of candidate PDCCHs in the candidate PDCCH set. The solution improves PDCCH coverage performance and increases the reliability of data transmission.

Description

PDCCH receiving method, sending method, device and storage medium Technical Field

[0001] The present application relates to the field of mobile communication technology, and in particular to a PDCCH receiving method, sending method, device and storage medium. Background Art

[0002] With the continuous development of mobile communication technology, terminal equipment can receive a PDCCH by monitoring a candidate PDCCH in a candidate PDCCH set.

[0003] In related technologies, the limited transmission power of satellites in the NTN system limits downlink coverage performance, causing the terminal device to be unable to detect the PDCCH, thus affecting the data transmission process.

[0004] Summary of the Invention

[0005] The present invention provides a method for receiving and sending a PDCCH, a device, and a storage medium. The technical solution is as follows:

[0006] On the one hand, an embodiment of the present application provides a method for receiving a PDCCH, the method being performed by a terminal device, and the method further comprising:

[0007] receiving a PDCCH based on a set of candidate PDCCHs;

[0008] The PDCCH corresponds to one candidate PDCCH or multiple candidate PDCCHs in the candidate PDCCH set.

[0009] On the one hand, an embodiment of the present application provides a method for transmitting a PDCCH, the method being performed by a network device, and the method further comprising:

[0010] Based on the candidate PDCCH set, a PDCCH is sent to the terminal device; the PDCCH corresponds to one candidate PDCCH in the candidate PDCCH set, or multiple candidate PDCCHs.

[0011] On the other hand, an embodiment of the present application provides a PDCCH receiving device, the device comprising:

[0012] A receiving module, configured to receive a PDCCH based on a candidate PDCCH set;

[0013] The PDCCH corresponds to one candidate PDCCH or multiple candidate PDCCHs in the candidate PDCCH set.

[0014] On the other hand, an embodiment of the present application provides a PDCCH transmitting device, the device comprising:

[0015] The sending module is used to send a PDCCH to the terminal device based on a candidate PDCCH set; the PDCCH corresponds to one candidate PDCCH or multiple candidate PDCCHs in the candidate PDCCH set.

[0016] On the other hand, an embodiment of the present application provides a terminal device, the terminal device including a processor, a memory, and a transceiver;

[0017] A computer program is stored in the memory, and the processor executes the computer program so that the terminal device implements the above-mentioned PDCCH receiving method or sending method.

[0018] On the other hand, an embodiment of the present application provides a network device, the network device including a processor, a memory, and a transceiver;

[0019] The memory stores a computer program, and the processor executes the computer program to enable the network device to implement the above-mentioned PDCCH receiving method or sending method.

[0020] On the other hand, an embodiment of the present application further provides a computer-readable storage medium, in which a computer program is stored. The computer program is loaded and executed by a processor to implement the above-mentioned PDCCH receiving method or sending method.

[0021] On the other hand, the present application also provides a chip, which is used to run in a communication device so that the communication device executes the above-mentioned PDCCH receiving method or sending method.

[0022] In another aspect, the present application provides a computer program product, comprising computer instructions stored in a computer-readable storage medium. A processor of a communication device reads the computer instructions from the computer-readable storage medium and executes the computer instructions, causing the communication device to perform the above-described PDCCH receiving method or sending method.

[0023] On the other hand, the present application provides a computer program, which is executed by a processor of a communication device to implement the above-mentioned PDCCH receiving method or sending method.

[0024] The embodiments of the present application provide a PDCCH reception scheme and a PDCCH transmission scheme, which transmits and receives PDCCH based on a candidate PDCCH set. The PDCCH received by the terminal device corresponds to one or more candidate PDCCHs in the candidate PDCCH set. The terminal device can repeatedly transmit the PDCCH or introduce a higher aggregation level, thereby greatly improving the coverage performance of the PDCCH and improving the reliability of data transmission in the NTN system. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0026] FIG1 is a schematic diagram of the architecture of a communication system provided by an embodiment of the present application;

[0027] FIG2 is a flowchart of a PDCCH receiving method and a PDCCH sending method provided by one embodiment of the present application;

[0028] FIG3 is a schematic diagram of a candidate PDCCH repetition transmission set provided by an exemplary embodiment of the present application;

[0029] FIG4 is a schematic diagram of CCE indexes corresponding to candidate PDCCHs located within a CORESET in a candidate PDCCH repetition transmission set provided by an exemplary embodiment of the present application;

[0030] FIG5 is a schematic diagram of candidate PDCCHs in a candidate PDCCH repetition transmission set corresponding to discontinuous candidate PDCCHs in a search space set provided by an exemplary embodiment of the present application;

[0031] FIG6 is a schematic diagram of candidate PDCCHs in a candidate PDCCH repetition transmission set corresponding to consecutive candidate PDCCHs in a search space set provided by an exemplary embodiment of the present application;

[0032] FIG7 is a schematic diagram of a candidate PDCCH in a search space set corresponding to a first candidate PDCCH in a candidate PDCCH repetition transmission set provided by an exemplary embodiment of the present application;

[0033] FIG8 is a schematic diagram showing that some candidate PDCCHs in a candidate PDCCH retransmission set are located outside the CORESET according to an exemplary embodiment of the present application;

[0034] FIG9 is a schematic diagram of an exemplary embodiment of the present application providing a candidate PDCCH repetition transmission set outside the CORESET using interleaved mapping;

[0035] FIG10 is a schematic diagram of a candidate PDCCH outside a CORESET in a candidate PDCCH repetition transmission set provided by an exemplary embodiment of the present application using non-interleaved mapping;

[0036] FIG11 is a schematic diagram of determining a PDCCH repetition transmission area according to a CORESET configuration and a number of PDCCH repetition transmissions provided by an exemplary embodiment of the present application;

[0037] FIG12 is a block diagram of a PDCCH receiving apparatus provided by one embodiment of the present application;

[0038] FIG13 is a block diagram of a PDCCH transmitting apparatus provided by one embodiment of the present application;

[0039] FIG14 is a schematic structural diagram of a communication device provided in one embodiment of the present application. DETAILED DESCRIPTION

[0040] In order to make the objectives, technical solutions and advantages of this application clearer, the implementation methods of this application are further described in detail below with reference to the accompanying drawings.

[0041] The network architecture and business scenarios described in the embodiments of the present application are intended to more clearly illustrate the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided by the embodiments of the present application. A person skilled in the art will appreciate that, with the evolution of the network architecture and the emergence of new business scenarios, the technical solutions provided by the embodiments of the present application are equally applicable to similar technical problems.

[0042] 1 shows a schematic diagram of a communication system according to an exemplary embodiment of the present application, which includes a network device 110 and a terminal device 120, and / or a terminal device 120 and a terminal device 130, which are not limited in the present application.

[0043] The network device 110 in the present application provides wireless communication functions, and the network device 110 includes but is not limited to: Evolved Node B (eNB), Radio Network Controller (RNC), Node B (NB), Base Station Controller (BSC), Base Transceiver Station (BTS), Home Base Station (e.g., Home Evolved Node B, or Home Node B, HNB), Baseband Unit (BBU), Access Point (AP) in Wireless Fidelity (Wi-Fi) system, Wireless Relay Node, Wireless Backhaul Node, Transmission Point (TP) or Transmission and Reception Point (TRP), etc., and can also be the Next Generation Node B (NGNB) in the 5th Generation (5G) mobile communication system. The term "gNB" refers to a base station (B, gNB) or a transmission point (TRP or TP), or one or a group of antenna panels (including multiple antenna panels) of a base station in a 5G system, or a network node constituting a gNB or a transmission point, such as a baseband unit (BBU) or a distributed unit (DU), or a base station in a Beyond Fifth Generation (B5G) or a 6th Generation (6G) mobile communication system, or a core network (CN), fronthaul, backhaul, radio access network (RAN), network slicing, or a serving cell, primary cell (PCell), primary secondary cell (PSCell), special cell (SpCell), secondary cell (SCell), or neighboring cell of a terminal device.

[0044] The terminal device 120 and / or terminal device 130 in this application are also called user equipment (UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent, and user device. The terminals include, but are not limited to, handheld devices, wearable devices, vehicle-mounted devices, and Internet of Things devices, such as mobile phones, tablet computers, e-book readers, laptop computers, desktop computers, televisions, game consoles, mobile Internet devices (MIDs), augmented reality (AR) terminals, virtual reality (VR) terminals, and mixed reality (MR) terminals, wearable devices, handles, electronic tags, controllers, wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical care, wireless terminals in smart grids, wireless terminals in transportation safety, wireless terminals in smart cities, wireless terminals in smart homes, wireless terminals in remote medical surgery, cellular phones, cordless phones, session initiation protocol (SIP) phones, wireless local loops (WLANs), and wireless terminals in industrial control. Loop (WLL) stations, personal digital assistants (PDA), TV set-top boxes (STB), customer premises equipment (CPE), etc.

[0045] The network device 110 and the terminal device 120 communicate with each other via some air interface technology, such as a Uu interface.

[0046] Exemplarily, there are two communication scenarios between the network device 110 and the terminal device 120: an uplink communication scenario and a downlink communication scenario. Uplink communication refers to sending signals to the network device 110; downlink communication refers to sending signals to the terminal device 120.

[0047] The terminal device 120 and the terminal device 130 communicate with each other via some air interface technology, such as a PC5 interface.

[0048] In some embodiments, there are two communication scenarios between the terminal device 120 and the terminal device 130: a first sideline communication scenario and a second sideline communication scenario. The first sideline communication refers to sending signals to the terminal device 130; the second sideline communication refers to sending signals to the terminal device 120.

[0049] Terminal device 120 and terminal device 130 are both within the network coverage and located in the same cell, or terminal device 120 and terminal device 130 are both within the network coverage but located in different cells, or terminal device 120 is within the network coverage but terminal device 130 is outside the network coverage.

[0050] The technical solutions provided in the embodiments of the present application can be applied to various communication systems, such as: Global System of Mobile communication (GSM) system, Code Division Multiple Access (CDMA) system, Wideband Code Division Multiple Access (WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, LTE Frequency Division Duplex (FDD) system, LTE Time Division Duplex (TDD) system, Advanced Long Term Evolution (LTE-A) system, Universal Mobile Telecommunication System (UMTS), Worldwide Interoperability for Microwave Access (WiMAX) communication system, 5G mobile communication system, New Radio (NR) system, NR system evolution system, LTE on unlicensed spectrum (LTE-U) system, NR on unlicensed spectrum (NR-based access to unlicensed spectrum) system. Unlicensed spectrum, NR-U) system, terrestrial communication network (Terrestrial Networks, TN) system, non-terrestrial communication network (Non-Terrestrial Networks, NTN) system, wireless local area network (Wireless Local Area Networks, WLAN), wireless fidelity (Wireless Fidelity, Wi-Fi), cellular Internet of Things system, cellular passive Internet of Things system, can also be applied to the subsequent evolution system of the 5G NR system, and can also be applied to B5G, 6G and subsequent evolution systems. In some embodiments of the present application, "NR" may also be referred to as a 5G NR system or a 5G system. Among them, the 5G mobile communication system may include non-standalone networking (NSA) and / or standalone networking (SA).

[0051] The technical solutions provided in the embodiments of the present application can also be applied to machine type communication (MTC), long term evolution technology for machine-to-machine communication (LTE-M), device-to-device (D2D) network, machine-to-machine (M2M) network, Internet of Things (IoT) network or other networks. Among them, the IoT network can include, for example, the Internet of Vehicles. Among them, the communication mode in the Internet of Vehicles system is collectively referred to as vehicle to other devices (Vehicle to X, V2X, X can represent anything), for example, the V2X can include: vehicle to vehicle (V2V) communication, vehicle to infrastructure (V2I) communication, vehicle to pedestrian communication (V2P) or vehicle to network (V2N) communication, etc.

[0052] Before introducing the technical solution of this application, some background technical knowledge involved in this application is first introduced and explained. The following related technologies can be combined with the technical solution of the embodiment of this application as optional solutions, and they all fall within the scope of protection of the embodiment of this application. The embodiment of this application includes at least part of the following contents:

[0053] 1) NR system PDCCH structure design

[0054] A physical downlink control channel (PDCCH) consists of one or more control channel elements (CCEs). The number of CCEs that make up the PDCCH is called the aggregation level. Table 1 shows the aggregation levels currently supported in related technologies. A CCE consists of six resource element groups (REGs), where one REG is equivalent to the physical resources corresponding to one orthogonal frequency division multiplexing (OFDM) symbol in the time domain and one resource block (RB) in the frequency domain.

[0055] Table 1

[0056] PDCCH is transmitted in the Control-Resource Set (CORESET). A CORESET consists of RBs and time domain The REGs within a CORESET are numbered in ascending order starting from 0 in a time-domain-first manner, starting from the first OFDM symbol and the lowest RB of the CORESET.

[0057] A terminal device can be configured with multiple CORESETs, and each CORESET is associated with only one CCE-REG mapping method. The CCE-REG mapping within a CORESET can be interleaved or non-interleaved, and is described by a REG bundle:

[0058] REG bundle i is defined as REGs{iL,iL+1,…,iL+L-1}, where L is the size of the REG bundle, is the number of REGs in CORESET;

[0059] CCE j consists of REG bundles {f(6j / L), f(6j / L+1), …f(6j / L+6 / L-1)}, where f(·) is the interleaving function.

[0060] For non-interleaved CCE-REG mapping, L=6 and f(x)=x.

[0061] For interleaved CCE-REG mapping, When L∈{2,6}; hour,

[0062] The interleaving mapping adopts a rectangular interleaver, and the interleaving function is defined as:

[0063] Where x = cR + r, r = 0, 1, ..., R-1, c = 0, 1, ..., C-1; R is the number of rows of the rectangular interleaver and R∈{2, 3, 6}; And C is an integer; n shift is an offset parameter used to randomize inter-cell interference.

[0064] 2) NR system PDCCH monitoring process

[0065] The terminal device determines a candidate PDCCH set to be monitored according to a PDCCH search space set configured by a higher layer. The search space set may be a common search space (CSS) set or a user-specific search space (USS) set.

[0066] Specifically, for the search space set s associated with CORESET p, in the time slot When the aggregation level is L, the terminal device determines the candidate PDCCH The corresponding CCE index is:

[0067] in:

[0068] For CSS, For USS, Y p,-1 =n RNTI ≠0, D=65537, for p mod 3=0, A p =39827, for p mod 3 = 1, A p =39829, for p mod 3 = 2, A p =39839;

[0069] i=0,…,L-1;

[0070] N CCE,p The number of CCEs in CORESET p, numbered from 0 to N CCE,p -1;

[0071] If cross-carrier indication is configured, n CI The value of the carrier indicator field is used to ensure that candidate PDCCHs scheduling different carriers occupy non-overlapping CCEs as much as possible; otherwise, including CSS, n CI =0;

[0072] in It is configured by the upper layer for the terminal equipment, in the service cell n CI The number of candidate PDCCHs monitored when the aggregation level is L in the search space set s;

[0073] For CSS, For USS, When the aggregation level is L in the search space set s, all configured n CI Value The maximum value of .

[0074] The maximum PDCCH aggregation level in related technologies is 16, and repeated PDCCH transmission is not supported. Given the limited downlink coverage performance of NTN systems due to limited satellite transmission power, terminal devices may not be able to detect PDCCHs, affecting data transmission in NTN systems. Therefore, improving PDCCH coverage performance is an urgent issue.

[0075] Please refer to FIG2 , which shows a flowchart of a PDCCH receiving method and a PDCCH sending method provided by an embodiment of the present application. The method can be interactively executed by a terminal device and a network device, wherein the terminal device can be the terminal device 120 or the terminal device 130 in the network architecture shown in FIG1 , and the network device can be the network device 110 in the network architecture shown in FIG1 ; the method can include the following steps:

[0076] Step 201: Based on a candidate PDCCH set, a network device sends a PDCCH; correspondingly, a terminal device receives a PDCCH based on the candidate PDCCH set;

[0077] The PDCCH corresponds to one candidate PDCCH in the candidate PDCCH set, or multiple candidate PDCCHs.

[0078] That is, the network device sends a PDCCH to the terminal device, and the terminal device receives the PDCCH by monitoring the candidate PDCCHs in the candidate PDCCH set.

[0079] The PDCCH received by the terminal device corresponds to one or more candidate PDCCHs in the candidate PDCCH set.

[0080] To improve the coverage performance of PDCCH, the terminal device can repeatedly transmit PDCCH or introduce a higher aggregation level.

[0081] On the one hand, if the PDCCH received by the terminal device corresponds to multiple candidate PDCCHs in the candidate PDCCH set, then:

[0082] 1. At least one candidate PDCCH is located in the CORESET, and the CCE index corresponding to the candidate PDCCH in the CORESET is determined according to the configuration information of the search space set;

[0083] 2. One or more candidate PDCCHs may be located outside the CORESET. The resource locations of the candidate PDCCHs outside the CORESET are determined based on the resource locations of the candidate PDCCHs within the CORESET.

[0084] 3. Provide CORESET configuration for PDCCH retransmission and / or the number of PDCCH retransmissions.

[0085] On the other hand, if the PDCCH received by the terminal device corresponds to a candidate PDCCH in the candidate PDCCH set, then:

[0086] 1. The aggregation level of the candidate PDCCH is greater than 16.

[0087] 2. Provide CORESET configurations with a CCE number greater than 16 and / or a number of candidate PDCCHs with an aggregation level greater than 16.

[0088] To sum up, the solution shown in the embodiment of the present application sends and receives PDCCH based on the candidate PDCCH set. The PDCCH received by the terminal device corresponds to one or more candidate PDCCHs in the candidate PDCCH set. The terminal device can repeatedly transmit the PDCCH or introduce a larger aggregation level, which greatly improves the coverage performance of the PDCCH and improves the reliability of data transmission in the NTN system.

[0089] In some embodiments, when the PDCCH received by the terminal device corresponds to multiple candidate PDCCHs in the candidate PDCCH set, the multiple candidate PDCCHs are used to repeatedly transmit the PDCCH.

[0090] That is to say, if the PDCCH received by the terminal device corresponds to multiple candidate PDCCHs in the candidate PDCCH set, the above multiple candidate PDCCHs can be used to repeatedly transmit the PDCCH, and the embodiment of the present application can improve the coverage performance of the PDCCH.

[0091] In some embodiments, step 201 of FIG. 2 may be implemented as follows:

[0092] When the PDCCH received by the terminal device corresponds to multiple candidate PDCCHs in the candidate PDCCH set, the terminal device receives the PDCCH based on the candidate PDCCH repetition transmission set; the candidate PDCCH repetition transmission set consists of multiple candidate PDCCHs in the candidate PDCCH set.

[0093] That is, when the PDCCH received by the terminal device corresponds to multiple candidate PDCCHs in the candidate PDCCH set, the multiple candidate PDCCHs constitute a candidate PDCCH repetition transmission set, and the candidate PDCCH repetition transmission set is used for the terminal device to receive the PDCCH.

[0094] In an embodiment of the present application, the PDCCH received by the terminal device corresponds to multiple candidate PDCCHs in the candidate PDCCH set. At this time, the terminal device can receive PDCCH retransmissions by monitoring the candidate PDCCH retransmission set in the candidate PDCCH set, thereby improving the reliability of data transmission.

[0095] Please refer to FIG3 , which shows a schematic diagram of a candidate PDCCH repetition transmission set provided by an exemplary embodiment of the present application.

[0096] As shown in FIG3 , the candidate PDCCH set includes candidate PDCCHs {0, 1, 2, 3}. For repeated PDCCH transmission, the candidate PDCCH set further includes a candidate PDCCH repeated transmission set {0, 1}.

[0097] The candidate PDCCH repetition transmission set #0 includes candidate PDCCHs {0, 1}, and the candidate PDCCH repetition transmission set #1 includes candidate PDCCHs {2, 3}.

[0098] The terminal device receives PDCCH repetition transmission by monitoring candidate PDCCH repetition transmission sets #0 and #1.

[0099] In some embodiments, at least one candidate PDCCH in the candidate PDCCH retransmission set is located in a first CORESET; the first CORESET is the CORESET where the PDCCH retransmission is located.

[0100] That is to say, all the candidate PDCCHs in the above-mentioned candidate PDCCH retransmission set are located in the first CORESET; or, in the above-mentioned candidate PDCCH retransmission set, some of the candidate PDCCHs are located in the first CORESET, and the other part of the candidate PDCCHs are located outside the first CORESET; the embodiment of the present application makes the resource configuration of PDCCH retransmission more flexible, providing more space for further expansion in the future.

[0101] The CORESET itself may not have PDCCH repetition transmission information. For example, when the first CORESET is associated with the first search space set (SS set), PDCCH repetition transmission is performed; when the first CORESET is associated with the second SS set, PDCCH repetition transmission is not performed.

[0102] In some embodiments, the method shown in FIG2 further includes:

[0103] Based on the configuration information of the search space set, the terminal device determines the CCE index corresponding to the first candidate PDCCH; the first candidate PDCCH is one of the candidate PDCCHs located in the first CORESET in the candidate PDCCH repetition transmission set.

[0104] That is, the CCE index corresponding to the first candidate PDCCH is determined by the configuration information of the search space set.

[0105] In an embodiment of the present application, at least one candidate PDCCH in the candidate PDCCH retransmission set is located in the CORESET. At this time, the terminal device can determine the CCE index corresponding to the candidate PDCCH in the candidate PDCCH retransmission set located in the CORESET based on the configuration information of the search space set, that is, determine the CCE index corresponding to the first candidate PDCCH.

[0106] Please refer to FIG4 , which shows a schematic diagram of CCE indexes corresponding to candidate PDCCHs located in a CORESET in a candidate PDCCH repetition transmission set provided by an exemplary embodiment of the present application.

[0107] As shown in Figure 4, the number of CCEs N in CORESET p CCE,p =8, aggregation level L=2, n CI =0, For example, according to the relevant technology, the terminal device first determines the candidate PDCCH in the search space set s The corresponding CCE index is:

[0108] That is, candidate PDCCH The corresponding CCE index is CCE#0-1.

[0109] Subsequently, if the candidate PDCCH #0 in the candidate PDCCH retransmission set #0 is the same as the candidate PDCCH in the search space set s Correspondingly, the terminal device further determines that the CCE index corresponding to the candidate PDCCH#0 in the candidate PDCCH repetition transmission set #0 is CCE#0-1.

[0110] An embodiment of the present application provides a feasible solution for determining the CCE index corresponding to the first candidate PDCCH through the configuration information of the search space set, which can reduce the standardization complexity; the terminal device determines the CCE index corresponding to the candidate PDCCH located in the CORESET in the candidate PDCCH retransmission set based on the CCE index corresponding to the candidate PDCCH in the search space set, that is, determines the CCE index corresponding to the above-mentioned first candidate PDCCH, thereby determining the resource position corresponding to the first candidate PDCCH.

[0111] In some embodiments, the determining of the CCE index corresponding to the first candidate PDCCH based on the configuration information of the search space set includes:

[0112] Based on the CCE index corresponding to the second candidate PDCCH, the terminal device determines the CCE index corresponding to the first candidate PDCCH;

[0113] The second candidate PDCCH is a candidate PDCCH in the search space set that corresponds to the first candidate PDCCH.

[0114] That is, the CCE index corresponding to the first candidate PDCCH is determined by the CCE index corresponding to the second candidate PDCCH.

[0115] In an embodiment of the present application, at least one candidate PDCCH in the candidate PDCCH retransmission set located within the CORESET has a corresponding relationship with a candidate PDCCH in the search space set. At this time, for a candidate PDCCH in the candidate PDCCH retransmission set that has a corresponding relationship with a candidate PDCCH in the search space set, the terminal device can determine the CCE index corresponding to the candidate PDCCH in the corresponding candidate PDCCH retransmission set based on the CCE index corresponding to the candidate PDCCH in the search space set.

[0116] An embodiment of the present application provides a feasible solution for determining the CCE index corresponding to the first candidate PDCCH based on a corresponding relationship, which can reduce the standardization complexity; the first candidate PDCCH and the second candidate PDCCH have a corresponding relationship, and the terminal device can determine the CCE index of the first candidate PDCCH based on the CCE index of the second candidate PDCCH, thereby determining the resource position corresponding to the first candidate PDCCH.

[0117] In some embodiments, the candidate PDCCHs in the candidate PDCCH repetition transmission set that are located in the CORESET may correspond to discontinuous candidate PDCCHs in the search space set; or, may correspond to continuous candidate PDCCHs in the search space set.

[0118] On the one hand, if the candidate PDCCHs in the candidate PDCCH retransmission set located in the CORESET correspond to discontinuous candidate PDCCHs in the search space set, please refer to FIG5 , which shows a schematic diagram of the candidate PDCCHs in the candidate PDCCH retransmission set corresponding to discontinuous candidate PDCCHs in the search space set provided by an exemplary embodiment of the present application.

[0119] As shown in FIG5 , the candidate PDCCH {0, 1} in the candidate PDCCH repetition transmission set #0 corresponds to the candidate PDCCH in the search space set s.

[0120] At this time, the candidate PDCCHs in the candidate PDCCH retransmission set and the candidate PDCCHs in the search space set have a more flexible corresponding relationship, making resource configuration for PDCCH retransmission more flexible.

[0121] Among them, the terminal device can select the candidate PDCCH in the search space set s. The corresponding CCE index determines the CCE index corresponding to the candidate PDCCH #0 in the candidate PDCCH repetition transmission set #0, that is, CCE #0-1;

[0122] The terminal device can select the candidate PDCCHs in the search space set s. The corresponding CCE index determines the CCE index corresponding to the candidate PDCCH #1 in the candidate PDCCH repetition transmission set #0, that is, CCE #4-5.

[0123] On the other hand, if the candidate PDCCHs in the candidate PDCCH repetition transmission set that are located in the CORESET correspond to consecutive candidate PDCCHs in the search space set.

[0124] Please refer to FIG6 , which shows a schematic diagram of candidate PDCCHs in a candidate PDCCH repetition transmission set corresponding to consecutive candidate PDCCHs in a search space set provided by an exemplary embodiment of the present application.

[0125] As shown in FIG6 , the search space set configuration is the same as that of FIG4 . The terminal device first determines the candidate PDCCH in the search space set. The corresponding CCE indices are CCE#0-1 and CCE#2-3 respectively. If the candidate PDCCH {0,1} in the candidate PDCCH retransmission set #0 is the same as the candidate PDCCH in the search space set s, In one-to-one correspondence, the terminal device further determines that the CCE indices corresponding to the candidate PDCCH {0, 1} in the candidate PDCCH repetition transmission set #0 are CCE #0-1 and CCE #2-3 respectively.

[0126] Among them, a candidate PDCCH {0,1} located in the CORESET in the candidate PDCCH retransmission set is the first candidate PDCCH; a candidate PDCCH in the search space set that has a corresponding relationship with the first candidate PDCCH That is the second candidate PDCCH.

[0127] In some embodiments, the method shown in FIG2 further includes:

[0128] Based on the resource position of the first candidate PDCCH, the terminal device determines the resource position of the third candidate PDCCH; the third candidate PDCCH is any one of the candidate PDCCHs in the candidate PDCCH repetition transmission set located in the first CORESET except the first candidate PDCCH.

[0129] That is, the resource position of the third candidate PDCCH is determined by the resource position of the first candidate PDCCH.

[0130] In an embodiment of the present application, the first candidate PDCCH located in the CORESET in the candidate PDCCH retransmission set corresponds to the candidate PDCCH in the search space set, and the resource positions corresponding to other candidate PDCCHs (i.e., the third candidate PDCCH) located in the CORESET in the candidate PDCCH retransmission set are determined based on the resource positions corresponding to the first candidate PDCCH.

[0131] Please refer to FIG. 7 , which shows a schematic diagram of a candidate PDCCH in a search space set corresponding to a first candidate PDCCH in a candidate PDCCH repetition transmission set provided by an exemplary embodiment of the present application.

[0132] As shown in FIG7 , the first candidate PDCCH in the candidate PDCCH repetition transmission set #0, such as candidate PDCCH #0, corresponds to the candidate PDCCH in the search space set s. For other candidate PDCCHs (i.e., the third candidate PDCCH) located in CORESET in the candidate PDCCH repetition transmission set #0, such as candidate PDCCH #1, the corresponding frequency domain resources are determined according to the first candidate PDCCH, such as candidate PDCCH #1 and candidate PDCCH #0 occupy adjacent CCE indexes or adjacent frequency domain resources.

[0133] That is to say, the CCE index or frequency domain resources of other candidate PDCCHs can be determined based on the CCE index or frequency domain resources of a candidate PDCCH located in the CORESET in the candidate PDCCH retransmission set; the embodiment of the present application can improve the feasibility of PDCCH retransmission.

[0134] In some embodiments, the candidate PDCCHs in the candidate PDCCH retransmission set have at least one of the following correspondences:

[0135] The candidate PDCCHs in the candidate PDCCH retransmission set correspond to consecutive candidate PDCCHs in the search space set;

[0136] The candidate PDCCHs in the candidate PDCCH retransmission set correspond to consecutive CCE indices;

[0137] The candidate PDCCHs in the candidate PDCCH repetition transmission set correspond to consecutive resource positions.

[0138] That is to say, the above correspondence can be the following three: the candidate PDCCH in the candidate PDCCH retransmission set corresponds to the consecutive candidate PDCCH in the search space set; or, corresponds to consecutive CCE indexes; or, corresponds to consecutive resource positions; it can also be any combination of the three correspondences; the embodiment of the present application can simplify the process of the terminal device receiving PDCCH, thereby reducing the workload.

[0139] Among them, the candidate PDCCHs in the candidate PDCCH retransmission set located in the CORESET correspond to the consecutive candidate PDCCHs in the search space set. As shown in Figure 6, the candidate PDCCHs {0,1} in the candidate PDCCH retransmission set #0 correspond to the candidate PDCCHs in the search space set s. At this time, the terminal device can determine the CCE indexes corresponding to other candidate PDCCHs located in the CORESET in the candidate PDCCH repetition transmission set based on the CCE index corresponding to a candidate PDCCH located in the CORESET in the candidate PDCCH repetition transmission set, thereby reducing the complexity of the terminal device in detecting PDCCH repetition transmission.

[0140] In other words, if the terminal device searches for the candidate PDCCH in the search space set s (i.e., the second candidate PDCCH) is used to determine the CCE index corresponding to candidate PDCCH#0 (i.e., the first candidate PDCCH) in the candidate PDCCH repetition transmission set #0, that is, CCE#0-1; then, based on the continuous correspondence, the CCE index corresponding to candidate PDCCH#0 (i.e., the first candidate PDCCH) in the candidate PDCCH repetition transmission set #0 can also be used to determine the CCE index corresponding to candidate PDCCH#1 in the candidate PDCCH repetition transmission set #0, that is, CCE#2-3.

[0141] Among them, the candidate PDCCH in the search space set s and the candidate PDCCH in the search space set s (i.e., the second candidate PDCCH) is adjacent, candidate PDCCH#1 in candidate PDCCH repetition transmission set #0 is adjacent to candidate PDCCH#0 (i.e., the first candidate PDCCH) in candidate PDCCH repetition transmission set #0;

[0142] Candidate PDCCHs in the search space set s The candidate PDCCH #1 in the candidate PDCCH repetition transmission set #0 has a corresponding relationship with the candidate PDCCH in the search space set s. (ie, the second candidate PDCCH) has a corresponding relationship with candidate PDCCH #0 (ie, the first candidate PDCCH) in candidate PDCCH repetition transmission set #0.

[0143] In some embodiments, at least one candidate PDCCH in the candidate PDCCH repetition transmission set is located outside the first CORESET.

[0144] That is to say, all the candidate PDCCHs in the above-mentioned candidate PDCCH retransmission set are located outside the first CORESET; or, in the above-mentioned candidate PDCCH retransmission set, some of the candidate PDCCHs are located outside the first CORESET, and the other part of the candidate PDCCHs are located within the first CORESET; the embodiment of the present application makes the resource configuration of PDCCH retransmission more flexible, providing more space for further expansion in the future.

[0145] Please refer to FIG8 , which shows a schematic diagram of a situation in which some candidate PDCCHs in a candidate PDCCH repetition transmission set are located outside the CORESET according to an exemplary embodiment of the present application.

[0146] As shown in Figure 8, the number of CCEs N in CORESET p CCE,p =4, aggregation level L=4, n CI =0, For example, at this time, the terminal device determines that the candidate PDCCH#0 in the candidate PDCCH retransmission set is located in the CORESET, and the candidate PDCCH#1 is located outside the CORESET.

[0147] In some embodiments, the method shown in FIG2 further includes:

[0148] Based on the resource position of the first candidate PDCCH, the terminal device determines the resource position of the fourth candidate PDCCH; the fourth candidate PDCCH is any one of the candidate PDCCHs in the candidate PDCCH repetition transmission set that is located outside the first CORESET.

[0149] That is, the resource position of the fourth candidate PDCCH is determined by the resource position of the first candidate PDCCH.

[0150] As shown in Figure 8, the terminal device first determines that the CCE index corresponding to the candidate PDCCH#0 in the candidate PDCCH repetition transmission set within the CORESET is CCE#0-3, that is, the resource position of the first candidate PDCCH is first determined. Subsequently, one or more resource regions are determined outside the CORESET, for example, the resource region has the same size as the CORESET, and the resource position corresponding to the candidate PDCCH#1 is determined in the resource region, that is, the resource position of the fourth candidate PDCCH is determined.

[0151] It should be noted that the number of extra-CORESET resource regions depends on the number of extra-CORESET candidate PDCCHs.

[0152] For example, when there is only one candidate PDCCH outside the CORESET, only one resource region outside the CORESET is required.

[0153] An embodiment of the present application provides a resource determination scheme for a candidate PDCCH located outside a first CORESET in a candidate PDCCH retransmission set, wherein a terminal device determines the resource position of a candidate PDCCH located outside a CORESET in a candidate PDCCH retransmission set based on the resource position of the candidate PDCCH located within a CORESET in the candidate PDCCH retransmission set; thereby reducing the workload of resource determination.

[0154] In some embodiments, the first candidate PDCCH and the fourth candidate PDCCH adopt non-interleaved mapping; or,

[0155] The first candidate PDCCH and the fourth candidate PDCCH adopt interleaved mapping; or,

[0156] The first candidate PDCCH adopts interleaved mapping, and the fourth candidate PDCCH adopts non-interleaved mapping.

[0157] That is to say, the candidate PDCCH located in the CORESET in the candidate PDCCH retransmission set, and the candidate PDCCH located in the CORESET in the candidate PDCCH retransmission set, can adopt the same CCE-REG mapping method or different CCE-REG mapping methods; the embodiment of the present application can improve the flexibility of this solution and provide more space for further expansion in the future.

[0158] On the one hand, the candidate PDCCH located in the CORESET in the PDCCH repetition transmission set (ie, the first candidate PDCCH) adopts non-interleaved mapping; the candidate PDCCH located outside the CORESET in the PDCCH repetition transmission set (ie, the fourth candidate PDCCH) also adopts non-interleaved mapping.

[0159] As shown in FIG8 , the candidate PDCCH#0 located in the CORESET in the candidate PDCCH repetition transmission set adopts non-interleaved mapping and corresponds to CCE#0-3; the candidate PDCCH#1 located outside the CORESET also adopts non-interleaved mapping in the resource area outside the CORESET and corresponds to CCE#0-3.

[0160] On the other hand, the candidate PDCCH located in the CORESET in the PDCCH repetition transmission set (ie, the first candidate PDCCH) adopts interleaving mapping; the candidate PDCCH located outside the CORESET in the PDCCH repetition transmission set (ie, the fourth candidate PDCCH) also adopts interleaving mapping.

[0161] Please refer to FIG9 , which shows a schematic diagram of adopting interleaved mapping for candidate PDCCHs outside the CORESET in a candidate PDCCH repetition transmission set provided by an exemplary embodiment of the present application.

[0162] As shown in Figure 9, the number of CCEs N in CORESET p CCE,p =4, aggregation level L=2, n CI =0, Taking the number of interleaver rows R=2 as an example, the candidate PDCCH#0 located in the CORESET in the candidate PDCCH repetition transmission set adopts interleaving mapping and corresponds to CCE#0-1; the candidate PDCCH#1 located outside the CORESET also adopts interleaving mapping in the resource area outside the CORESET and corresponds to CCE#0-1.

[0163] On the other hand, the candidate PDCCH in the PDCCH repetition transmission set located within the CORESET (ie, the first candidate PDCCH) adopts interleaved mapping; the candidate PDCCH in the PDCCH repetition transmission set located outside the CORESET (ie, the fourth candidate PDCCH) adopts non-interleaved mapping.

[0164] Please refer to FIG. 10 , which shows a schematic diagram of adopting non-interleaved mapping for candidate PDCCHs outside the CORESET in a candidate PDCCH repetition transmission set provided by an exemplary embodiment of the present application.

[0165] As shown in Figure 10, the number of CCEs N in CORESET p CCE,p =4, aggregation level L=2, n CI =0, Taking the interleaver row number R=2 as an example, the candidate PDCCH#0 located in the CORESET in the candidate PDCCH repetition transmission set adopts interleaved mapping and corresponds to CCE#0-1; the candidate PDCCH#1 located outside the CORESET adopts non-interleaved mapping in the resource area outside the CORESET and corresponds to CCE#0-1.

[0166] At this time, candidate PDCCHs outside the CORESET can occupy continuous frequency domain resources.

[0167] In some embodiments, the method shown in FIG2 further includes:

[0168] Based on the configuration information of the first CORESET and / or the number of PDCCH repetition transmissions, the terminal device determines a resource interval for PDCCH repetition transmission.

[0169] That is, the resource interval used for PDCCH repetition transmission is determined by the configuration information of the first CORESET and / or the number of PDCCH repetition transmissions.

[0170] Among them, considering that multiple candidate PDCCHs in the candidate PDCCH retransmission set occupy more REGs, it is necessary to configure a resource area with more REGs to accommodate multiple candidate PDCCHs in the candidate PDCCH retransmission set; an embodiment of the present application provides a feasible solution for determining the resource interval used for PDCCH retransmission, so as to better meet the needs of PDCCH retransmission.

[0171] Specifically, for example, the terminal device determines a resource region for repeated PDCCH transmission according to the CORESET configuration and / or the number of repeated PDCCH transmissions.

[0172] In some embodiments, determining a resource interval for PDCCH repetition transmission based on a CORESET configuration and / or a number of PDCCH repetition transmissions includes:

[0173] Based on the first CORESET candidate value set and the indication information of the MIB, the terminal device determines the first CORESET;

[0174] The first CORESET candidate value set is a CORESET candidate value set where PDCCH is repeatedly transmitted.

[0175] That is, the first CORESET is determined by the first CORESET candidate value set and the indication information of the MIB.

[0176] Among them, for CORESET0, a CORESET candidate value set for repeated PDCCH transmission is introduced, and the terminal device determines the applied CORESET from the CORESET candidate value set according to the indication information of CORESET0 configuration in the MIB.

[0177] For example, for CORESET0, a CORESET candidate value set for PDCCH repeated transmission is introduced, such as The network device instructs the terminal device to use the instruction information configured in CORESET0 in the MIB The terminal device determines that the CORESET used for PDCCH repeated transmission has RBs and symbols.

[0178] An embodiment of the present application provides a scheme for determining the CORESET where PDCCH repeated transmission is located. The terminal device can determine the CORESET where PDCCH repeated transmission is located based on the CORESET candidate value set where PDCCH repeated transmission is located and the indication information of the MIB; the embodiment of the present application introduces a CORESET candidate value set for PDCCH repeated transmission, and utilizes the existing MIB indication information to simplify the acquisition process of the first CORESET and reduce the standardization complexity.

[0179] In some embodiments, the number of PDCCH repetition transmissions is equal to the number of candidate PDCCHs in the candidate PDCCH repetition transmission set.

[0180] That is, the number of PDCCH repetition transmissions of a candidate PDCCH repetition transmission set is equal to the number of candidate PDCCHs in the candidate PDCCH repetition transmission set.

[0181] Please refer to FIG11 , which shows a schematic diagram of determining a PDCCH repetition transmission region according to a CORESET configuration and the number of PDCCH repetition transmissions provided by an exemplary embodiment of the present application.

[0182] As shown in Figure 11(a), for CORESET0, the maximum allowed configuration is RBs and symbols, can support 3 candidate PDCCHs with aggregation level L = 16. For PDCCH retransmission, if CORESET is configured with RBs and symbols, that is, 64 CCEs, can support 4 candidate PDCCHs with aggregation level L=16.

[0183] As shown in Figure 11(b), the network device configuration CORESET has RBs and symbols, and the number of PDCCH repetition transmissions is configured to be equal to 4, then the terminal device determines that the resource area for PDCCH repetition transmission has REGs, i.e. 64 CCEs, can support 4 candidate PDCCHs with aggregation level L = 16. One candidate PDCCH is located in the CORESET, and the other three candidate PDCCHs are located outside the CORESET.

[0184] In an embodiment of the present application, a solution for obtaining the number of PDCCH repetition transmissions is provided. The terminal device can regard the number of candidate PDCCHs in the candidate PDCCH repetition transmission set as the corresponding number of PDCCH repetition transmissions to improve PDCCH coverage performance.

[0185] In some embodiments, the method shown in FIG2 further includes:

[0186] Based on the CORESET configuration information or the search space set configuration information, the terminal device obtains the number of PDCCH repetition transmissions.

[0187] That is, the number of PDCCH repetition transmissions is determined by CORESET configuration information or search space set configuration information.

[0188] The number of PDCCH repetition transmissions is provided in the CORESET configuration information or the search space set configuration information.

[0189] For example, the number of PDCCH repetition transmissions is provided in the configuration information of CORESET0, and the terminal device determines the corresponding number of PDCCH repetition transmissions when receiving the CORESET0 configuration information.

[0190] For another example, the number of PDCCH repetition transmissions is provided in the search space set configuration information, and the terminal device determines the corresponding number of PDCCH repetition transmissions when receiving the search space set configuration information.

[0191] An embodiment of the present application provides a solution for obtaining the number of PDCCH retransmissions. A terminal device can determine the required number of PDCCH retransmissions based on CORESET configuration information or search space set configuration information. This can reduce the workload of obtaining the number of PDCCH retransmissions while providing more space for further expansion in the future.

[0192] In some embodiments, the method shown in FIG2 further includes:

[0193] Based on the candidate PDCCH index, or the starting CCE index corresponding to the candidate PDCCH, the terminal device obtains the number of PDCCH repetition transmissions.

[0194] That is, the number of PDCCH repetition transmissions is associated with the candidate PDCCH index or the starting CCE index corresponding to the candidate PDCCH.

[0195] For example, candidate values ​​for the number of PDCCH repetition transmissions include N rep ={2,4}, then the candidate PDCCH index When N rep =2; When N rep =4. For another example, the starting CCE index of the candidate PDCCH (n cce,0 / L)mod 2=0, corresponding to N rep =2;(n cce,0 / L)mod 2=1, corresponding to N rep =4.

[0196] In an embodiment of the present application, a scheme for obtaining the number of PDCCH retransmissions is provided, and the terminal device can determine the required number of PDCCH retransmissions based on the candidate PDCCH index or the starting CCE index corresponding to the candidate PDCCH; it can reduce the workload of obtaining the number of PDCCH retransmissions, and at the same time provide more space for further expansion in the future.

[0197] In some embodiments, the method shown in FIG2 further includes:

[0198] Based on the indication information in the PBCH, the terminal device determines whether to apply the first CORESET candidate value set and / or the number of PDCCH repetition transmissions.

[0199] That is, whether to apply the first CORESET candidate value set and / or the number of PDCCH repetition transmissions is determined by the indication information in the PBCH.

[0200] Among them, for CORESET0, the terminal device determines whether to apply the PDCCH repeated transmission process according to the indication information in the PBCH, and the PDCCH repeated transmission process includes at least one of the following: a first CORESET candidate value set and a number of PDCCH repeated transmissions.

[0201] For example, the current PBCH information bit It is a reserved bit and can be used to indicate whether to apply the PDCCH repeated transmission process, such as When the PDCCH retransmission process is not applied, Indicates the application of PDCCH repeated transmission process.

[0202] The PDCCH retransmission process includes a CORESET candidate value set and / or the number of PDCCH retransmissions introduced for PDCCH retransmission.

[0203] In an embodiment of the present application, a solution is provided for determining whether to apply the first CORESET candidate value set and the number of PDCCH retransmissions, which further optimizes the PDCCH retransmission process and makes the solution more flexible.

[0204] In some embodiments, when the PDCCH received by the terminal device corresponds to a candidate PDCCH in the candidate PDCCH set, the aggregation level of the candidate PDCCH is greater than 16.

[0205] That is to say, if the PDCCH received by the terminal device corresponds to a candidate PDCCH in the candidate PDCCH set, the aggregation level of the candidate PDCCH is greater than 16, and the embodiment of the present application can improve the coverage performance of the PDCCH.

[0206] At this time, for the search space set s associated with CORESET p, in the time slot When the aggregation level is L>16, such as L=32, the terminal device determines the candidate PDCCH The corresponding CCE index is:

[0207] That is, the formula for determining the CCE index corresponding to the candidate PDCCH is the same as when the aggregation level is L≤16.

[0208] Considering that candidate PDCCHs with aggregation levels L>16 occupy more REGs, a CORESET with more REGs needs to be configured to accommodate candidate PDCCHs with aggregation levels L>16.

[0209] In some embodiments, the method shown in FIG2 further includes:

[0210] Based on the second CORESET candidate value set and the indication information of the MIB, the terminal device determines the second CORESET;

[0211] The second CORESET candidate value set is a CORESET candidate value set in which the number of CCEs is greater than 16, and the second CORESET is a CORESET in which the number of CCEs is greater than 16.

[0212] That is, the second CORESET is determined by the second CORESET candidate value set and the indication information of the MIB.

[0213] In some embodiments, for CORESET0, a CORESET candidate value set with a CCE number greater than 16 is introduced, and the terminal device determines the applied CORESET from the CORESET candidate value set according to the indication information of the CORESET0 configuration in the MIB.

[0214] For example, for CORESET0, a set of CORESET candidate values ​​with CCE number greater than 16 is introduced, such as The network device instructs the terminal device to use the instruction information configured in CORESET0 in the MIB The terminal device determines that the CORESET has RBs and symbols, supporting candidate PDCCHs with aggregation level L=64.

[0215] In an embodiment of the present application, a solution for determining a CORESET with a number of CCEs greater than 16 is provided to support candidate PDCCHs with an aggregation level greater than 16, thereby improving the coverage performance of the PDCCH.

[0216] In some embodiments, the method shown in FIG2 further includes:

[0217] Based on the indication information in the PBCH, the terminal device determines whether to apply the second CORESET candidate value set and / or a PDCCH with an aggregation level greater than 16.

[0218] That is, whether to apply the second CORESET candidate value set and / or a PDCCH with an aggregation level greater than 16 is determined by the indication information in the PBCH.

[0219] The embodiment of the present application provides a solution for determining whether to apply the second CORESET candidate value set and a PDCCH with an aggregation level greater than 16, further optimizing the PDCCH transmission process, thereby reducing the workload of this solution.

[0220] In some embodiments, the method shown in FIG2 further includes:

[0221] Based on the configuration information of the search space set, the terminal device determines the number of fifth candidate PDCCHs in the candidate PDCCH set; the fifth candidate PDCCH is a candidate PDCCH with an aggregation level greater than 16.

[0222] That is, the number of fifth candidate PDCCHs in the candidate PDCCH set is determined by the configuration information of the search space set.

[0223] In an embodiment of the present application, a solution for determining the number of candidate PDCCHs with an aggregation level greater than 16 is provided, and a larger aggregation level is introduced to help improve the PDCCH coverage performance.

[0224] In some embodiments, the number of candidate PDCCHs with aggregation level L>16 is provided in the search space set configuration information.

[0225] For example, the number of candidate PDCCHs with aggregation level L=32 is provided in the configuration information of the search space set s. The terminal device determines the number of candidate PDCCHs for the search space set s when the aggregation level is L=32.

[0226] In related art, a terminal device receives a PDCCH by monitoring a candidate PDCCH in a candidate PDCCH set within a CORESET, wherein the received PDCCH corresponds to a candidate PDCCH in the candidate PDCCH set.

[0227] To improve the coverage performance of the PDCCH, the present application repeats the PDCCH transmission or introduces a larger aggregation level. At this time, in some embodiments, the terminal device receives the PDCCH by monitoring the candidate PDCCH in the candidate PDCCH set, wherein the received PDCCH corresponds to one or more candidate PDCCHs in the candidate PDCCH set.

[0228] The technical solution of the present application provides a design solution for enhancing PDCCH coverage, including: a PDCCH received by a terminal device corresponds to one or more candidate PDCCHs in a candidate PDCCH set.

[0229] If the received PDCCH corresponds to multiple candidate PDCCHs, PDCCH coverage performance is improved by repeated PDCCH transmission:

[0230] 1) If at least one candidate PDCCH is located in the CORESET, the terminal device can determine the CCE index corresponding to the candidate PDCCH in the CORESET based on the configuration information of the search space set;

[0231] 2) One or more candidate PDCCHs may be located outside the CORESET. The terminal device may determine the resource location of the candidate PDCCH outside the CORESET based on the resource location of the candidate PDCCH within the CORESET.

[0232] 3) Provide a CORESET configuration for PDCCH repetition transmission and / or the number of PDCCH repetition transmissions, and the terminal device can determine the resource region used for PDCCH repetition transmission and the number of PDCCH repetition transmissions.

[0233] If the received PDCCH corresponds to a candidate PDCCH:

[0234] 1) If the aggregation level of the candidate PDCCH is greater than 16, the PDCCH coverage performance is improved by using a higher aggregation level;

[0235] 2) Provide the CORESET configuration and the number of candidate PDCCHs corresponding to the aggregation level greater than 16, so that the terminal device can determine the CCE index corresponding to the candidate PDCCH with the aggregation level greater than 16.

[0236] The technical solution of the present application is designed based on the NTN system and can be extended to any system that uses terminal equipment to report alarm information solutions.

[0237] Please refer to Figure 12, which shows a block diagram of a PDCCH receiving device provided by an embodiment of the present application. The PDCCH receiving device has the function of implementing the method shown in Figure 2 above, which is performed by the terminal device. As shown in Figure 12, the device may include:

[0238] The receiving module 1201 is configured to receive a PDCCH based on a candidate PDCCH set;

[0239] The PDCCH corresponds to one candidate PDCCH in the candidate PDCCH set, or multiple candidate PDCCHs.

[0240] In some embodiments, when a PDCCH corresponds to multiple candidate PDCCHs in a candidate PDCCH set, the multiple candidate PDCCHs are used to repeatedly transmit the PDCCH.

[0241] In some embodiments, the receiving module 1201 is configured to:

[0242] In a case where the PDCCH corresponds to a plurality of candidate PDCCHs in the candidate PDCCH set, receiving the PDCCH based on the candidate PDCCH repetition transmission set;

[0243] The candidate PDCCH repetition transmission set consists of multiple candidate PDCCHs in the candidate PDCCH set.

[0244] In some embodiments, at least one candidate PDCCH in the candidate PDCCH retransmission set is located in a first CORESET; the first CORESET is the CORESET where the PDCCH retransmission is located.

[0245] In some embodiments, the apparatus further includes a first determining module configured to:

[0246] Determine, based on the configuration information of the search space set, a CCE index corresponding to the first candidate PDCCH;

[0247] The first candidate PDCCH is one of the candidate PDCCHs in the candidate PDCCH repetition transmission set and located in the first CORESET.

[0248] In some embodiments, the first determining module is configured to:

[0249] Determine the CCE index corresponding to the first candidate PDCCH based on the CCE index corresponding to the second candidate PDCCH;

[0250] The second candidate PDCCH is a candidate PDCCH in the search space set that corresponds to the first candidate PDCCH.

[0251] In some embodiments, the apparatus further includes a second determining module configured to:

[0252] Determining a resource location of a third candidate PDCCH based on the resource location of the first candidate PDCCH;

[0253] The third candidate PDCCH is any one of the candidate PDCCHs in the candidate PDCCH repetition transmission set that is located in the first CORESET except the first candidate PDCCH.

[0254] In some embodiments, the candidate PDCCHs in the candidate PDCCH retransmission set have at least one of the following correspondences:

[0255] The candidate PDCCHs in the candidate PDCCH retransmission set correspond to consecutive candidate PDCCHs in the search space set;

[0256] The candidate PDCCHs in the candidate PDCCH retransmission set correspond to consecutive CCE indices;

[0257] The candidate PDCCHs in the candidate PDCCH repetition transmission set correspond to consecutive resource positions.

[0258] In some embodiments, at least one candidate PDCCH in the candidate PDCCH repetition transmission set is located outside the first CORESET.

[0259] In some embodiments, the apparatus further includes a third determining module configured to:

[0260] Determining a resource position of a fourth candidate PDCCH based on the resource position of the first candidate PDCCH;

[0261] The fourth candidate PDCCH is any one of the candidate PDCCHs in the candidate PDCCH repetition transmission set that is outside the first CORESET.

[0262] In some embodiments,

[0263] The first candidate PDCCH and the fourth candidate PDCCH adopt non-interleaved mapping; or,

[0264] The first candidate PDCCH and the fourth candidate PDCCH adopt interleaved mapping; or,

[0265] The first candidate PDCCH adopts interleaved mapping, and the fourth candidate PDCCH adopts non-interleaved mapping.

[0266] In some embodiments, the apparatus further includes a fourth determining module configured to:

[0267] Based on the configuration information of the first CORESET and / or the number of PDCCH repetition transmissions, a resource interval for PDCCH repetition transmission is determined.

[0268] In some embodiments, the fourth determining module is configured to:

[0269] Determine a first CORESET based on the first CORESET candidate value set and indication information of the MIB;

[0270] The first CORESET candidate value set is a candidate value set of the CORESET where the PDCCH is repeatedly transmitted.

[0271] In some embodiments, the number of PDCCH repetition transmissions is equal to the number of candidate PDCCHs in the candidate PDCCH repetition transmission set.

[0272] In some embodiments, the device further includes a first acquisition module configured to:

[0273] Based on the CORESET configuration information or the search space set configuration information, the number of PDCCH repetition transmissions is obtained.

[0274] In some embodiments, the apparatus further includes a second acquisition module configured to:

[0275] The number of PDCCH repetition transmissions is obtained based on the candidate PDCCH index or the starting CCE index corresponding to the candidate PDCCH.

[0276] In some embodiments, the apparatus further includes a fifth determining module configured to:

[0277] Based on the indication information in the PBCH, determine whether to apply the first CORESET candidate value set and / or the number of PDCCH repetition transmissions.

[0278] In some embodiments, when the PDCCH corresponds to a candidate PDCCH in a candidate PDCCH set, the aggregation level of the candidate PDCCH is greater than 16.

[0279] In some embodiments, the apparatus further includes a sixth determining module configured to:

[0280] Determine a second CORESET based on the second CORESET candidate value set and the indication information of the MIB;

[0281] The second CORESET candidate value set is a CORESET candidate value set in which the number of CCEs is greater than 16, and the second CORESET is a CORESET in which the number of CCEs is greater than 16.

[0282] In some embodiments, the apparatus further includes a seventh determining module configured to:

[0283] Based on the indication information in the PBCH, determine whether to apply the second CORESET candidate value set and / or a PDCCH with an aggregation level greater than 16.

[0284] In some embodiments, the apparatus further includes an eighth determining module configured to:

[0285] Determining, based on configuration information of the search space set, a number of fifth candidate PDCCHs in the candidate PDCCH set;

[0286] The fifth candidate PDCCH is a candidate PDCCH with an aggregation level greater than 16.

[0287] Please refer to Figure 13, which shows a block diagram of a PDCCH transmission device provided by an embodiment of the present application. The PDCCH transmission device has the function of implementing the method shown in Figure 2 above, which is performed by the network device. As shown in Figure 13, the device may include:

[0288] The sending module 1301 is used to send a PDCCH to the terminal device based on the candidate PDCCH set; the PDCCH corresponds to one candidate PDCCH in the candidate PDCCH set, or multiple candidate PDCCHs.

[0289] In some embodiments, when a PDCCH corresponds to multiple candidate PDCCHs in a candidate PDCCH set, the multiple candidate PDCCHs are used to repeatedly transmit the PDCCH.

[0290] In some embodiments, when a PDCCH corresponds to multiple candidate PDCCHs in a candidate PDCCH set, the multiple candidate PDCCHs constitute a candidate PDCCH repetition transmission set.

[0291] In some embodiments, at least one candidate PDCCH in the candidate PDCCH retransmission set is located within the first CORESET;

[0292] The first CORESET is the CORESET where the PDCCH is repeatedly transmitted.

[0293] In some embodiments, the CCE index corresponding to the first candidate PDCCH is determined by configuration information of the search space set;

[0294] The first candidate PDCCH is one of the candidate PDCCHs in the candidate PDCCH repetition transmission set and located in the first CORESET.

[0295] In some embodiments, the CCE index corresponding to the first candidate PDCCH is determined by the CCE index corresponding to the second candidate PDCCH;

[0296] The second candidate PDCCH is a candidate PDCCH in the search space set that corresponds to the first candidate PDCCH.

[0297] In some embodiments, the resource position of the third candidate PDCCH is determined by the resource position of the first candidate PDCCH;

[0298] The third candidate PDCCH is any one of the candidate PDCCHs in the candidate PDCCH repetition transmission set that is located in the first CORESET except the first candidate PDCCH.

[0299] In some embodiments, the candidate PDCCHs in the candidate PDCCH retransmission set have at least one of the following correspondences:

[0300] The candidate PDCCHs in the candidate PDCCH retransmission set correspond to consecutive candidate PDCCHs in the search space set;

[0301] The candidate PDCCHs in the candidate PDCCH retransmission set correspond to consecutive CCE indices;

[0302] The candidate PDCCHs in the candidate PDCCH repetition transmission set correspond to consecutive resource positions.

[0303] In some embodiments, at least one candidate PDCCH in the candidate PDCCH repetition transmission set is located outside the first CORESET.

[0304] In some embodiments, the resource position of the fourth candidate PDCCH is determined by the resource position of the first candidate PDCCH;

[0305] The fourth candidate PDCCH is any one of the candidate PDCCHs in the candidate PDCCH repetition transmission set that is outside the first CORESET.

[0306] In some embodiments, the first candidate PDCCH and the fourth candidate PDCCH adopt non-interleaved mapping; or,

[0307] The first candidate PDCCH and the fourth candidate PDCCH adopt interleaved mapping; or,

[0308] The first candidate PDCCH adopts interleaved mapping, and the fourth candidate PDCCH adopts non-interleaved mapping.

[0309] In some embodiments, the resource interval used for PDCCH repetition transmission is determined by configuration information of the first CORESET and / or the number of PDCCH repetition transmissions.

[0310] In some embodiments, the first CORESET is determined by a first CORESET candidate value set and indication information of the MIB;

[0311] The first CORESET candidate value set is a CORESET candidate value set used for PDCCH repetition transmission.

[0312] In some embodiments, the number of PDCCH repetition transmissions is equal to the number of candidate PDCCHs in the candidate PDCCH repetition transmission set.

[0313] In some embodiments, the number of PDCCH repetition transmissions is determined by CORESET configuration information or search space set configuration information.

[0314] In some embodiments, the number of times the PDCCH is repeatedly transmitted is determined by the candidate PDCCH index, or the starting CCE index corresponding to the candidate PDCCH.

[0315] In some embodiments, whether to apply the first CORESET candidate value set and / or the number of PDCCH repetition transmissions is determined by indication information in the PBCH.

[0316] In some embodiments, when the PDCCH corresponds to a candidate PDCCH in a candidate PDCCH set, the aggregation level of the candidate PDCCH is greater than 16.

[0317] In some embodiments, the second CORESET is determined by a second CORESET candidate value set and indication information of the MIB;

[0318] The second CORESET candidate value set is a CORESET candidate value set in which the number of CCEs is greater than 16, and the second CORESET is a CORESET in which the number of CCEs is greater than 16.

[0319] In some embodiments, whether to apply the second CORESET candidate value set and / or a PDCCH with an aggregation level greater than 16 is determined by indication information in the PBCH.

[0320] In some embodiments, the number of fifth candidate PDCCHs in the candidate PDCCH set is determined by configuration information of the search space set;

[0321] The fifth candidate PDCCH is a candidate PDCCH with an aggregation level greater than 16.

[0322] It should be noted that the device provided in the above embodiment only uses the division of the above-mentioned functional modules as an example to implement its functions. In actual applications, the above-mentioned functions can be assigned to different functional modules according to actual needs, that is, the content structure of the device can be divided into different functional modules to complete all or part of the functions described above.

[0323] Regarding the apparatus in the above embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be elaborated here.

[0324] Please refer to FIG14 , which shows a schematic diagram of the structure of a communication device 1400 provided in one embodiment of the present application. The communication device 1400 may include: a processor 1401 , a receiver 1402 , a transmitter 1403 , a memory 1404 , and a bus 1405 .

[0325] The processor 1401 includes one or more processing cores. The processor 1401 executes various functional applications and information processing by running software programs and modules.

[0326] Receiver 1402 and transmitter 1403 can be implemented as a communication component, which can be a communication chip. This communication chip can also be called a transceiver. Memory 1404 is connected to processor 1401 via bus 1405. Memory 1404 can be used to store computer programs, and processor 1401 is used to execute the computer programs to implement the various steps in the above method embodiments.

[0327] In addition, the memory 1404 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, including but not limited to: magnetic disk or optical disk, electrically erasable programmable read-only memory, erasable programmable read-only memory, static access memory, read-only memory, magnetic memory, flash memory, and programmable read-only memory.

[0328] In an exemplary embodiment, when the communication device 1400 is implemented as the terminal device described above, the receiver 1402 and the processor 1401 execute a computer program to cause the communication device to implement the steps performed by the terminal device in the method shown in FIG2 . In this case, the receiver 1402 may correspondingly implement the method and steps implemented by the receiving module 1201 in FIG12 , and the transmitter 1403 may correspondingly implement the method and steps implemented by the transmitting module in FIG12 .

[0329] In an exemplary embodiment, when the communication device 1400 is implemented as the aforementioned network device, the transmitter 1403 and the processor 1401 execute a computer program to cause the communication device to implement the steps performed by the network device in the method shown in FIG2 . In this case, the transmitter 1403 may correspondingly implement the method and steps implemented by the transmitting module 1301 in FIG13 , and the receiver 1402 may correspondingly implement the method and steps implemented by the receiving module in FIG13 .

[0330] An embodiment of the present application also provides a computer-readable storage medium, which stores a computer program. The computer program is loaded and executed by a processor to implement all or part of the steps performed by the terminal device or network device in the method shown in Figure 2 above.

[0331] The present application also provides a chip, which is used to run in a communication device so that the communication device executes all or part of the steps in the method shown in Figure 2 above, which are executed by the terminal device or the network device.

[0332] The present application also provides a computer program product, which includes computer instructions stored in a computer-readable storage medium. A processor of a communication device reads the computer instructions from the computer-readable storage medium and executes the computer instructions, causing the communication device to perform all or part of the steps performed by the terminal device or network device in the method shown in FIG. 2 .

[0333] The present application also provides a computer program, which is executed by a processor of a communication device to implement all or part of the steps performed by a terminal device or a network device in the method shown in Figure 2 above.

[0334] Those skilled in the art will appreciate that in one or more of the above examples, the functions described in the embodiments of the present application can be implemented using hardware, software, firmware, or any combination thereof. When implemented using software, these functions can be stored in a computer-readable medium or transmitted as one or more instructions or codes on a computer-readable medium. Computer-readable media include computer storage media and communication media, wherein communication media include any media that facilitates the transmission of computer programs from one place to another. The storage medium can be any available medium that can be accessed by a general-purpose or special-purpose computer.

[0335] The above are merely exemplary embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A method for receiving PDCCH, characterized in that, The method is executed by a terminal device, and the method includes: Receiving a PDCCH based on a candidate PDCCH set; The PDCCH corresponds to one candidate PDCCH or multiple candidate PDCCHs in the candidate PDCCH set.

2. The method according to claim 1, characterized in that, In the case where the PDCCH corresponds to multiple candidate PDCCHs in the candidate PDCCH set, the multiple candidate PDCCHs are used for retransmitting the PDCCH.

3. The method according to claim 1 or 2, characterized in that, The receiving the PDCCH based on the candidate PDCCH set includes: In the case where the PDCCH corresponds to multiple candidate PDCCHs in the candidate PDCCH set, receiving the PDCCH based on a candidate PDCCH retransmission set; The candidate PDCCH retransmission set is composed of multiple candidate PDCCHs in the candidate PDCCH set.

4. The method according to claim 3, characterized in that, At least one candidate PDCCH in the candidate PDCCH retransmission set is located within a first CORESET; the first CORESET is the CORESET where the PDCCH retransmission is located.

5. The method according to claim 4, wherein The method further includes: Determining a CCE index corresponding to a first candidate PDCCH based on configuration information of a search space set; The first candidate PDCCH is one of the candidate PDCCHs within the first CORESET in the candidate PDCCH retransmission set.

6. The method according to claim 5, wherein The determining the CCE index corresponding to the first candidate PDCCH based on the configuration information of the search space set includes: Determining the CCE index corresponding to the first candidate PDCCH based on the CCE index corresponding to a second candidate PDCCH; The second candidate PDCCH is a candidate PDCCH in the search space set that has a corresponding relationship with the first candidate PDCCH.

7. The method according to claim 6, characterized in that The method further includes: Determining a resource location of a third candidate PDCCH based on the resource location of the first candidate PDCCH; The third candidate PDCCH is any one of the candidate PDCCHs within the first CORESET in the candidate PDCCH retransmission set except the first candidate PDCCH.

8. The method according to claim 6 or 7, characterized in that The candidate PDCCHs in the candidate PDCCH retransmission set have at least one of the following corresponding relationships: The candidate PDCCHs in the candidate PDCCH retransmission set correspond to consecutive candidate PDCCHs in the search space set; The candidate PDCCHs in the candidate PDCCH retransmission set correspond to consecutive CCE indexes; The candidate PDCCHs in the candidate PDCCH retransmission set correspond to consecutive resource locations.

9. The method according to any one of claims 4 to 8, characterized in that, At least one candidate PDCCH in the candidate PDCCH retransmission set is located outside the first CORESET.

10. The method according to claim 9, wherein The method further includes: Determining a resource location of a fourth candidate PDCCH based on the resource location of the first candidate PDCCH; The fourth candidate PDCCH is any one of the candidate PDCCHs outside the first CORESET in the candidate PDCCH retransmission set.

11. The method according to claim 10, wherein: the first candidate PDCCH and the fourth candidate PDCCH adopt non-interleaved mapping; or the first candidate PDCCH and the fourth candidate PDCCH adopt interleaved mapping; or the first candidate PDCCH adopts interleaved mapping and the fourth candidate PDCCH adopts non-interleaved mapping.

12. The method according to any one of claims 4 to 11, characterized in that, The method further includes: determining a resource interval for PDCCH repeated transmission based on the configuration information of the first CORESET and / or the PDCCH repeated transmission times.

13. The method according to claim 12, wherein The determining a resource interval for PDCCH repeated transmission based on CORESET configuration and / or PDCCH repeated transmission times includes: determining the first CORESET based on a first set of CORESET candidate values and the indication information of the MIB; the first set of CORESET candidate values is a set of candidate values of the CORESET where the PDCCH repeated transmission is located.

14. The method according to claim 12 or 13, characterized in that The PDCCH repeated transmission times is equal to the number of candidate PDCCHs in the candidate PDCCH repeated transmission set.

15. The method according to any one of claims 12 to 14, characterized in that, The method further includes: obtaining the PDCCH repeated transmission times based on the CORESET configuration information or the search space set configuration information.

16. The method according to any one of claims 12 to 15, characterized in that The method further includes: obtaining the PDCCH repeated transmission times based on the candidate PDCCH index or the starting CCE index corresponding to the candidate PDCCH.

17. The method according to claim 13 or 14, characterized in that The method further includes: determining whether to apply the first set of CORESET candidate values and / or the PDCCH repeated transmission times based on the indication information in the PBCH.

18. The method according to claim 1, wherein When the PDCCH corresponds to one candidate PDCCH in the candidate PDCCH set, the aggregation level of the one candidate PDCCH is greater than 16.

19. The method according to claim 1 or 18, characterized in that, The method further includes: determining a second CORESET based on a second set of CORESET candidate values and the indication information of the MIB; the second set of CORESET candidate values is a set of CORESET candidate values with the number of CCEs greater than 16, and the second CORESET is a CORESET with the number of CCEs greater than 16.

20. The method according to claim 19, wherein The method further includes: determining whether to apply the second set of CORESET candidate values and / or the PDCCH with an aggregation level greater than 16 based on the indication information in the PBCH.

21. The method according to any one of claims 18 to 20, characterized in that, The method further includes: determining the number of fifth candidate PDCCHs in the candidate PDCCH set based on the configuration information of the search space set; the fifth candidate PDCCH is a candidate PDCCH with an aggregation level greater than 16.

22. A method for transmitting PDCCH, characterized in that, The method is executed by a network device, and the method includes: sending a PDCCH to a terminal device based on the candidate PDCCH set; the PDCCH corresponds to one candidate PDCCH or multiple candidate PDCCHs in the candidate PDCCH set.

23. The method according to claim 22, characterized in that, When the PDCCH corresponds to multiple candidate PDCCHs in the candidate PDCCH set, the multiple candidate PDCCHs are used for the PDCCH repeated transmission.

24. The method according to claim 22 or 23, characterized in that When the PDCCH corresponds to multiple candidate PDCCHs in the candidate PDCCH set, the multiple candidate PDCCHs form a candidate PDCCH retransmission set.

25. The method according to claim 24, wherein At least one candidate PDCCH in the candidate PDCCH retransmission set is located within a first CORESET; The first CORESET is the CORESET where PDCCH retransmission occurs.

26. The method according to claim 25, wherein The CCE index corresponding to the first candidate PDCCH is determined by the configuration information of the search space set; The first candidate PDCCH is one of the candidate PDCCHs within the first CORESET in the candidate PDCCH retransmission set.

27. The method according to claim 26, wherein The CCE index corresponding to the first candidate PDCCH is determined by the CCE index corresponding to the second candidate PDCCH; The second candidate PDCCH is the candidate PDCCH in the search space set that has a corresponding relationship with the first candidate PDCCH.

28. The method according to claim 27, wherein The resource location of the third candidate PDCCH is determined by the resource location of the first candidate PDCCH; The third candidate PDCCH is any one of the candidate PDCCHs within the first CORESET in the candidate PDCCH retransmission set except the first candidate PDCCH.

29. The method according to claim 27 or 28, characterized in that, The candidate PDCCHs in the candidate PDCCH retransmission set have at least one of the following corresponding relationships: The candidate PDCCHs in the candidate PDCCH retransmission set correspond to consecutive candidate PDCCHs in the search space set; The candidate PDCCHs in the candidate PDCCH retransmission set correspond to consecutive CCE indices; The candidate PDCCHs in the candidate PDCCH retransmission set correspond to consecutive resource locations.

30. The method according to any one of claims 25 to 29, characterized in that, At least one candidate PDCCH in the candidate PDCCH retransmission set is located outside the first CORESET.

31. The method according to claim 30, wherein The resource location of the fourth candidate PDCCH is determined by the resource location of the first candidate PDCCH; The fourth candidate PDCCH is any one of the candidate PDCCHs outside the first CORESET in the candidate PDCCH retransmission set.

32. The method according to claim 31, wherein the first candidate PDCCH and the fourth candidate PDCCH adopt non-interleaved mapping; or the first candidate PDCCH and the fourth candidate PDCCH adopt interleaved mapping; or the first candidate PDCCH adopts interleaved mapping and the fourth candidate PDCCH adopts non-interleaved mapping.

33. The method according to any one of claims 25 to 32, characterized in that, The resource interval for PDCCH retransmission is determined by the configuration information of the first CORESET and / or the number of PDCCH retransmissions.

34. The method according to claim 33, wherein The first CORESET is determined by a first CORESET candidate value set and the indication information of the MIB; The first CORESET candidate value set is a CORESET candidate value set for PDCCH retransmission.

35. The method according to claim 33 or 34, characterized in that, The number of repetitions of the PDCCH is equal to the number of candidate PDCCHs in the candidate PDCCH repetition set.

36. The method according to any one of claims 33 to 35, characterized in that, The number of repetitions of the PDCCH is determined by the CORESET configuration information or the search space set configuration information.

37. The method according to any one of claims 33 to 36, characterized in that, The number of repetitions of the PDCCH is determined by the candidate PDCCH index or the starting CCE index corresponding to the candidate PDCCH.

38. The method according to any one of claims 34 or 35, characterized in that, Whether to apply the first CORESET candidate value set and / or the number of repetitions of the PDCCH is determined by the indication information in the PBCH.

39. The method according to claim 22, wherein When the PDCCH corresponds to a candidate PDCCH in the candidate PDCCH set, the aggregation level of the candidate PDCCH is greater than 16.

40. The method according to claim 22 or 39, characterized in that, The second CORESET is determined by the second CORESET candidate value set and the indication information in the MIB; The second CORESET candidate value set is a CORESET candidate value set with the number of CCEs greater than 16, and the second CORESET is a CORESET with the number of CCEs greater than 16.

41. The method according to claim 40, wherein Whether to apply the second CORESET candidate value set and / or the PDCCH with an aggregation level greater than 16 is determined by the indication information in the PBCH.

42. The method according to any one of claims 39 to 41, characterized in that The number of the fifth candidate PDCCHs in the candidate PDCCH set is determined by the configuration information of the search space set; The fifth candidate PDCCH is a candidate PDCCH with an aggregation level greater than 16.

43. A receiving device for PDCCH, characterized in that, The device includes: a receiving module, configured to receive a PDCCH based on a candidate PDCCH set; The PDCCH corresponds to one candidate PDCCH or multiple candidate PDCCHs in the candidate PDCCH set.

44. A transmission device for PDCCH, characterized in that, The device includes: a sending module, configured to send a PDCCH to a terminal device based on a candidate PDCCH set; the PDCCH corresponds to one candidate PDCCH or multiple candidate PDCCHs in the candidate PDCCH set.

45. A terminal device, characterized in that, The terminal device includes a processor, a memory, and a transceiver; A computer program is stored in the memory, and the processor executes the computer program to enable the terminal device to implement the PDCCH receiving method according to any one of claims 1 to 21 above.

46. A network device, characterized in that, The network device includes a processor, a memory, and a transceiver; A computer program is stored in the memory, and the processor executes the computer program to enable the network device to implement the PDCCH sending method according to any one of claims 22 to 42 above.

47. A computer-readable storage medium, characterized in that, A computer program is stored in the storage medium, and the computer program is used to be executed by a processor of a communication device to enable the communication device to implement the method according to any one of claims 1 to 42.

48. A chip, characterized in that, The chip includes programmable logic circuits and / or program instructions, and the chip is used to run in a communication device to enable the communication device to execute the method according to any one of claims 1 to 42.

49. A computer program product, characterized in that, The computer program product includes computer instructions, which are stored in a computer-readable storage medium; a processor of a communication device reads the computer instructions from the computer-readable storage medium and executes the computer instructions, so that the communication device executes the method according to any one of claims 1 to 42.

50. A computer program, characterized in that, The computer program is executed by a processor of a communication device to enable the communication device to implement the method according to any one of claims 1 to 42.

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