PDCCH (physical downlink control channel) repetition method and device, storage medium and program product

Abstract

The embodiment of the invention provides a PDCCH (Physical Downlink Control Channel) repetition method and device, a storage medium and a program product, relates to the technical field of communication, and is used for enhancing the coverage capability of a downlink physical channel. The method includes detecting PDCCH duplication on a common search space.

Description

Technical Field

[0001] The present disclosure relates to the field of communication technologies, and in particular, to a PDCCH repetition method, apparatus, storage medium, and program product. Background Art

[0002] The 5th generation mobile communication (5G) technology supports scenarios such as non-terrestrial network (NTN). In NTN, due to the hardware limitations of satellites, the link budget for downlink transmission may be smaller than that of traditional terrestrial networks. Therefore, it is necessary to consider enhancing the coverage ability of downlink physical channels (such as physical downlink control channel (PDCCH) and physical downlink shared channel (PDSCH)) to ensure that users can successfully receive downlink signals. Summary of the Invention

[0003] Embodiments of the present disclosure provide a PDCCH repetition method, apparatus, storage medium, and program product for enhancing the coverage ability of downlink physical channels.

[0004] To achieve the above object, the present disclosure adopts the following technical solutions.

[0005] In a first aspect, a PDCCH repetition method is provided, which is applied to a first node. The method includes:

[0006] Detecting PDCCH repetition on a common search space (CSS).

[0007] In a second aspect, a PDCCH repetition method is provided, which is applied to a second node. The method includes:

[0008] Sending PDCCH repetition on a common search space.

[0009] In a third aspect, a communication device is provided, which is applied to a first node. The device includes:

[0010] A processing unit for detecting PDCCH repetition on a common search space.

[0011] In a fourth aspect, a communication device is provided, which is applied to a second node. The device includes:

[0012] A sending unit for sending PDCCH repetition on a common search space.

[0013] In a fifth aspect, an electronic device is provided, including: a processor and a memory; the memory is coupled to the processor; the memory is used to store instructions executable by the processor, and the memory stores instructions executable by the processor; when the processor is configured to execute the instructions, the electronic device implements the method provided in any one of the first aspect or the second aspect as described above.

[0014] In a sixth aspect, a computer-readable storage medium is provided, and the computer-readable storage medium stores computer instructions. When the computer instructions run on a computer, the computer executes the method provided in any one of the first aspect or the second aspect.

[0015] In a seventh aspect, a computer program product including computer instructions is provided. When the computer instructions run on a computer, the computer executes the method provided in any one of the first aspect or the second aspect.

[0016] In the embodiments of the present disclosure, when the first node detects PDCCH repetitions in the common search space, the coverage ability of the downlink physical channel can be enhanced. Description of the Drawings

[0017] The drawings are used to provide a further understanding of the technical solutions of the present invention, and constitute a part of the specification. Together with the embodiments of the present disclosure, they are used to explain the technical solutions of the present invention, and do not constitute a limitation to the technical solutions of the present invention.

[0018] Figure 1 It is a schematic diagram of the architecture of an NTN communication system provided by an embodiment of the present disclosure;

[0019] Figure 2 It is a schematic diagram of the structure of a communication system provided by an embodiment of the present disclosure;

[0020] Figure 3 It is a schematic flowchart of a PDCCH repetition method provided by an embodiment of the present disclosure;

[0021] Figure 4 It is a schematic diagram of PDCCH repetition provided by an embodiment of the present disclosure;

[0022] Figure 5 It is a schematic flowchart of another PDCCH repetition method provided by an embodiment of the present disclosure;

[0023] Figure 6 It is a schematic diagram of the composition of a communication device provided by an embodiment of the present disclosure;

[0024] Figure 7 It is a schematic diagram of the composition of another communication device provided by an embodiment of the present disclosure;

[0025] Figure 8Schematic structural diagram of a communication device provided by an embodiment of the present disclosure. Detailed implementation manners

[0026] Next, the technical solutions in the embodiments of the present disclosure will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present disclosure.

[0027] Unless otherwise required by the context, throughout the specification and claims, the term "comprise" and its other forms, such as the third-person singular form "comprises" and the present participle form "comprising", are interpreted as open and inclusive, that is, "including, but not limited to". In the description of the specification, the terms "one embodiment", "some embodiments", "exemplary embodiments", "example", "specific example" or "some examples", etc., are intended to indicate that the specific features, structures, materials or characteristics related to the embodiment or example are included in at least one embodiment or example of the present disclosure. The schematic representations of the above terms are not necessarily referring to the same embodiment or example. In addition, the specific features, structures, materials or characteristics may be included in any one or more embodiments or examples in any appropriate manner.

[0028] The terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present disclosure, unless otherwise stated, the meaning of "a plurality" is two or more.

[0029] In the embodiments of the present disclosure, words such as "exemplary" or "for example" are used to represent examples, illustrations or explanations. Any embodiment or design solution described as "exemplary" or "for example" in the embodiments of the present disclosure should not be construed as being more preferred or having more advantages than other embodiments or design solutions. Exactly speaking, the use of words such as "exemplary" or "for example" is intended to present relevant concepts in a specific manner.

[0030] In addition, the use of "based on" implies openness and inclusiveness, because a process, step, calculation, or other action "based on" one or more of the stated conditions or values can, in practice, be based on additional conditions or values beyond those stated.

[0031] To more clearly describe the technical solutions of the embodiments of the present disclosure, before describing the technical solutions of the embodiments of the present disclosure, some technical terms involved in the embodiments of the present disclosure are first explained.

[0032] NTN architecture.

[0033] Exemplarily, Figure 1 is a schematic diagram of the architecture of an NTN communication system provided by an embodiment of the present disclosure. Refer to Figure 1 , in the NTN communication system, the link between the user equipment (UE) and the satellite is the service link, and the link between the access network device (such as Figure 1 the NTN base station shown in Figure 1 or the gateway station) and the satellite is the feeder link, and is common to all UEs (such as

[0034] UE1 and UEx shown in

[0035] The network side can configure the SS for the UE to indicate at what time the UE should detect the PDCCH. According to the different uses of the PDCCH, there are multiple SSs. For example, as shown in Table 1 below:

[0036] Table 1

[0037]

[0038]

[0039]

[0040] Among them, in the above Table 1, RNTI is the radio network temporary identifier (RNTI), Type0-PDCCH CSS represents the type 0 physical downlink control channel common search space (type 0-physical downlink control channel common search space, Type0-PDCCH CSS), SI-RNTI represents the system information radio network temporary identifier (system information radio network temporary identifier, SI-RNTI), pdcch-ConfigSIB1in MIB represents the physical downlink control channel configuration of system information block 1 in the master information block (PDCCH configuration for system information block 1 in master information block, PDCCH-ConfigSIB1 in MIB), searchSpaceSIB1 in PDCCH-ConfigCommon represents the SIB1 search space in the common PDCCH configuration, and searchSpaceZero in PDCCH-ConfigCommon represents search space 0 in the common PDCCH configuration.

[0041] Type0A-PDCCH CSS represents the type 0A physical downlink control channel common search space, and searchSpaceOtherSystemInformation in PDCCH-ConfigCommon represents the other system information search space in the common PDCCH configuration.

[0042] Type1-PDCCH CSS represents the Type 1 physical downlink control channel common search space. RA-RNTI is the random access radio network temporary identifier (RA-RNTI), TC-RNTI is the temporary cell radio network temporary identifier (TC-RNTI), MsgB-RNTI is the message B radio network temporary identifier (MsgB-RNTI). RA in RA-SearchSpace in PDCCH-ConfigCommon is random access (RA). RA-SearchSpace in PDCCH-ConfigCommon indicates the association between the common PDCCH configuration and the random access process. RACH is the random access channel (RACH), and RAR is the random access response (RAR).

[0043] Type1A-PDCCH CSS represents the Type 1A physical downlink control channel common search space. C-RNTI is the cell-radio network temporary identifier (C-RNTI), CS-RNTI is the configured scheduling radio network temporary identifier (CS-RNTI), SDT is small data transmission (SDT). SDT-SearchSpace in PDCCH-ConfigCommon indicates the small data transmission search space in the common PDCCH configuration.

[0044] Type2-PDCCH CSS represents the Type 2 Physical Downlink Control Channel Common Search Space, P-RNTI is the paging radio network temporary identifier (P-RNTI), and pagingSearchSpace in PDCCH-ConfigCommon represents the paging search space in the common PDCCH configuration. Type2A-PDCCH CSS represents the Type 2A Physical Downlink Control Channel Common Search Space, PEI-RNTI is the paging early indication-radio network temporary identifier (PEI-RNTI), BWP is the bandwidth part (BWP), and PEI-SearchSpace in PEI-ConfigBWP represents the PEI search space in the PEI configured BWP.

[0045] Type3-PDCCH CSS refers to Type 3 Physical Downlink Control Channel Common Search Space. INT-RNTI is the interruption radio network temporary identifier (INT-RNT). SFI-RNTI is the slot format indication radio network temporary identifier (SFI-RNTI). TPC-PUSCH-RNTI is the transmit power control - physical uplink shared channel radio network temporary identifier (TPC-PUSCH-RNTI). TPC-PUCCH-RNTI is the transmit power control - physical uplink control channel radio network temporary identifier (TPC-PUCCH-RNT). TPC-SRS-RNTI is the transmit power control - sounding reference signal radio network temporary identifier (TPC-SRS-RNTI). CI-RNTI is the cell identity radio network temporary identifier (CI-RNTI). cell DTRX-RNTI is the cell deep sleep receive radio network temporary identifier (cell DTRX-RNTI). MCS-C-RNTI is the modulation and coding scheme cell radio network temporary identifier (MCS-C-RNTI). PS-RNTI is the paging system radio network temporary identifier (PS-RNTI).SearchSpace in PDCCH-Config with searchSpaceType=common means that in the configuration of PDCCH, there is a search space configured as the common search space type.

[0046] USS is the UE specific search space (UE specific search space, USS), SP-CSI-RNTI is the semi-persistent channel state information radio network temporary identifier (semi-persistent channel state information radio network temporary identifier, SP-CSI-RNTI), SL-RNTI is the sidelink radio network temporary identifier (sidelink radio network temporary identifier, SL-RNTI), SL-CS-RNTI is the sidelink configured scheduling radio network temporary identifier (sidelink configured scheduling radio network temporary identifier, SL-CS-RNTI), V-RNTI is the vehicle radio network temporary identifier (vehicle radio network temporary identifier, V-RNTI), NCR-RNTI is the non-critical radio network temporary identifier (non-critical radio network temporary identifier, NCR-RNTI), SearchSpace in PDCCH-Config with searchSpaceType=ue-Specific means that in the configuration of PDCCH, there is a search space type specific to the UE.

[0047] It should be noted that for search space 0 (search Space Zero, SS0), the network side will indicate an index (4bit) to the UE. The UE determines the corresponding configuration information table (such as Table13-11) according to parameters such as the control resource set (control resource set, CORESET) multiplexing method, carrier frequency, and subcarrier spacing, and then determines the time-domain resources corresponding to SS0 through the index indicated by the network side. Among them, the configuration information table is predefined.

[0048] Exemplarily, Table 13-11 can be as shown in Table 2 below:

[0049] Table 2

[0050]

[0051] Among them, in Table 2 above, Index represents the index, Number of search space sets per slot represents the number of search space sets per time slot, First symbol index represents the first symbol index, symb is the abbreviation of symbol, even represents even, and odd represents odd.

[0052] Similarly, the control resource set 0 (CORESET0) can also be configured in the manner shown in Table 2 above. For other SSs and CORESETs, the network side can specifically configure the time-domain resources and frequency-domain resources of other SSs and CORESETs through radio resource control (RRC) signaling.

[0053] PDCCH repetition

[0054] In non-terrestrial communication networks, the following PDCCH repetition has been supported to enhance the coverage of downlink physical channels.

[0055] PDCCH repetition is operated by using two search spaces which are explicitly linked by configuration provided by the RRC layer, and are associated with corresponding CORESETs. For PDCCH repetition, two linked search spaces are configured with the same number of candidates, and two PDCCH candidates in two search spaces are linked with the same candidate index. When PDCCH repetition is scheduled to a UE, an intra-slot repetition is allowed and each repetition has the same number of CCEs and coded bits, and corresponds to the same DCI payload。

[0056] The relevant translation is as follows:

[0057] Random access。

[0058] Random access。

[0059] Random access (RA) is a very crucial step in a mobile communication system and also the last step for a terminal to establish a communication link with a base station. This process starts from the terminal sending a random access preamble to attempt to access the network until a basic signaling connection is established with the network. Specifically, random access allows the terminal to interact with the base station by sending a random access preamble to complete subsequent operations such as calls, resource requests, data transmissions, etc. At the same time, random access also achieves uplink time synchronization between the terminal and the system.

[0060] The technical solutions of the embodiments of the present disclosure are described below.

[0061] With the trend of the 6th generation mobile networks (6G), the future space-ground integrated communication system of 6G will be a major evolution of the current network coverage. Because the current terrestrial mobile communication technology can only cover less than 40% of the earth's land area, and for the vast majority of the earth's area occupied by the ocean, it is impossible to establish terrestrial base stations for coverage. To expand the territory of future mobile communication technology, it is very important to adopt NTN technology, that is, satellite communication technology (including low-earth orbit satellites, medium-earth orbit satellites) as an important coverage measure.

[0062] To ensure that users can successfully receive downlink signals, the downlink physical channel can be enhanced. The traditional terrestrial network has already enhanced the downlink physical channel to a certain extent, such as PDCCH repetition. However, the current PDCCH repetition is mainly applicable to users in the connected state and is not applicable to scenarios such as initial access.

[0063] Specifically, for PDCCH repetition, the network side configures two search spaces for the UE and configures the same search space linking identifier in the configurations of the two SSs, then the two SSs can be considered associated. Then, the network side can transmit the repeated PDCCH in the two associated SSs. The UE can improve the detection performance of the PDCCH by detecting the repeatedly transmitted PDCCH.

[0064] However, the above configuration of associating SS can only be performed after the UE enters the connected state and cannot be performed before the UE enters the connected state, that is, the coverage of the downlink physical channel cannot be enhanced before the UE enters the connected state. Moreover, the following SSs do not support being associated with other SSs: Search Space Set 0 (SS set 0), searchSpaceSIB1, searchSpaceOtherSystemInformation, pagingSearchSpace, ra-SearchSpace, search space for multimedia broadcast multicast service control channel (searchSpaceMCCH), search space for multicast traffic channel (searchSpaceMTCH), PEISearchSpace, and SDT-SearchSpace.

[0065] Exemplarily, the above problems are described in combination with the random access process of the terminal.

[0066] Generally speaking, when a terminal accesses the network, the following steps may be included:

[0067] Step 1: Search for SSB and demodulate PBCH to obtain MIB information. The MIB contains the relevant configuration of the PDCCH of SIB1, that is, searchSpaceZero (SS0) and controlResourceSetZero (CORESET0).

[0068] Step 2: According to the information indicated by the MIB, detect Type0-PDCCH and the scheduled SIB1. SIB1 contains basic system messages and also includes the configurations of other common channels, such as Type0A-PDCCH CSS, Type1-PDCCH CSS, etc.

[0069] Step 3: After obtaining the necessary system information (such as SIB1 and SIB19), initiate the random access process. The random access process may include the user sending Msg1 (random access preamble), receiving Msg2 (random access response RAR message), sending Msg3 (including the user identification code, etc.), and receiving Msg4 (contention resolution message). Type1-PDCCH CSS is used to detect the PDCCH in this process.

[0070] After completing the random access procedure, the base station can configure dedicated resources for the terminal, such as USS. Subsequently, the USS can be used to schedule the terminal's dedicated data, etc.

[0071] Combining the above steps, it can be seen that before the terminal obtains SIB1, only the configuration of an SS0 / Type0A-PDCCH CSS can be obtained through the MIB, and there is no other SS associated with it. That is, during initial access, the PDCCH (Type0-PDCCH) scheduling SIB1 does not support PDCCH repetition.

[0072] Therefore, the PDCCH repetition based on the associated SS in the related art is not applicable to common search spaces such as Type0-PDCCH, Type0A-PDCCH, Type1-PDCCH, Type1A-PDCCH, Type2-PDCCH, Type2A-PDCCH, etc., that is, it cannot be used for SIB scheduling, scheduling during the initial access process, paging scheduling, and SDT scheduling. That is to say, in the traditional terrestrial network, the downlink physical channel cannot be effectively enhanced before the UE enters the connected state. Combining the above content, in the case where the downlink physical channel cannot be effectively enhanced before the UE enters the connected state in the traditional terrestrial network, currently, a method for enhancing the coverage ability of the downlink physical channel in the NTN scenario is not provided. Therefore, how to enhance the coverage ability of the downlink physical channel in the NTN scenario is an urgent problem to be solved.

[0073] Based on this, the embodiments of the present disclosure provide a PDCCH repetition method, apparatus, storage medium, and program product. The first node detects PDCCH repetition in the common search space, that is, the PDCCH repetition method provided by the embodiments of the present disclosure supports PDCCH repetition in the common search space. In this way, the coverage ability of the downlink physical channel is enhanced.

[0074] The solutions of the embodiments of the present disclosure will be introduced below with reference to the accompanying drawings.

[0075] It should be understood that the specific implementations described herein are only used to explain the present disclosure and are not used to limit the present disclosure.

[0076] The technical solutions provided by the embodiments of the present disclosure can be applied to various mobile communication networks. For example, a new radio (NR) mobile communication network adopting 5G, a future mobile communication network, such as a 6G mobile communication network, or a multi-communication fusion system, etc. The embodiments of the present disclosure do not limit this.

[0077] Combined with Figure 1 the schematic architecture diagram shown, Figure 2 the following is a schematic structural diagram of a communication system provided by the embodiments of the present disclosure. As Figure 2As shown, the communication system includes, but is not limited to, satellite 10, multiple terminals (such as terminal 21 and terminal 22), and base station 31.

[0078] Among them, satellite 10 can be a geostationary satellite, a medium earth orbit (MEO) satellite, a low earth orbit (LEO) satellite, etc., and the embodiments of the present disclosure do not limit this.

[0079] In some embodiments, satellite 10 can be a satellite of a non-terrestrial communication network. A non-terrestrial communication network is a communication network that utilizes high-altitude or high-sky platforms. The main feature of a non-terrestrial communication network is that it does not rely on traditional ground infrastructure. These high-altitude or high-sky platforms include communication satellites, satellite networks, unmanned aerial vehicles, high-altitude airships, etc. High-sky platforms are usually equipped with radio frequency resources and can provide wide-area or global coverage, thereby meeting the needs of areas that cannot be covered by traditional ground networks.

[0080] In some embodiments, satellites are connected to each other through inter-satellite links, and the inter-satellite links can be microwave or laser connections.

[0081] For each of the multiple terminals, such as terminal 21, the terminal includes a terminal capable of communicating based on a satellite network. The terminal can be a terminal with a fixed position, or a personal handheld satellite mobile terminal (such as a satellite phone, an Iridium phone, etc.), a vehicle-mounted mobile terminal (such as a vehicle-mounted satellite phone, etc.), an airborne mobile terminal on an aircraft, and any mobile terminal flying within the atmosphere, such as an unmanned aerial vehicle, an airship, a balloon, etc. The embodiments of the present disclosure do not impose special restrictions on the specific form of the terminal. In the embodiments of the present disclosure, the device that realizes the function of the terminal can be the terminal or a device that supports the terminal to realize this function (such as a chip system in the terminal).

[0082] The above-mentioned base station 31 can be any one of an evolved Node B (eNB), a next-generation Node B (gNB), a transmission receive point (TRP), a transmission point (TP), an NTN base station, and some other access nodes. According to the size of the service coverage area provided, the base station can be further divided into a macro base station for providing a macro cell, a micro base station for providing a pico cell, and a femto base station for providing a femto cell. With the continuous evolution of wireless communication technology, future base stations may also adopt other names, and the embodiments of the present disclosure do not limit this.

[0083] In some embodiments, the base station 31 may be a separate physical device or may be co-located with other devices. For example, the base station 31 may be co-located with the satellite 10, that is, the functions of the base station 31 are integrated on the satellite 10.

[0084] In some embodiments, the base station 31 is used to provide wireless access services for terminals. Specifically, a base station provides a service coverage area (also referred to as a cell). Terminals entering this area can communicate with the base station 31 via wireless signals to receive the wireless access services provided by the base station 31.

[0085] In some embodiments, the communication system is an NTN communication system.

[0086] It should be understood that Figure 2 is an exemplary structural diagram, Figure 2 the number of devices included in the illustrated communication system is not limited. For example, the number of satellites, terminals, and base stations is not limited. And, in addition to Figure 2 the devices shown, Figure 2 the illustrated communication system may further include other devices, which are not limited herein.

[0087] Next, as Figure 3 shown, embodiments of the present disclosure provide a PDCCH repetition method, which can be applied to a first node. The first node can be Figure 3 any one of the multiple terminals shown in

[0088] S101. Detect PDCCH repetition in the common search space.

[0089] In some embodiments, in order to enhance the coverage of the downlink control channel (such as PDCCH and PDSCH), the first node detects PDCCH repetition in the common search space. Among them, PDCCH repetition means that in wireless communication, the transmission of PDCCH may be repeated multiple times to improve the reception success rate and reliability of PDCCH. PDCCH is mainly used to carry scheduling and other control information, such as transmission format, resource allocation, uplink scheduling, power control, and uplink retransmission information, etc. In a complex wireless environment, the transmission of PDCCH may be interfered with or lost. Therefore, the method of repeated transmission can improve the reception success rate of PDCCH, ensure that the control information is conveyed to the user terminal in a timely and reliable manner, and ensure the stability and reliability of the communication system. Detecting PDCCH repetition refers to the process of detecting the repeated transmission of PDCCH.

[0090] As an example, PDCCH repetition may refer to at least one of the following: the same PDCCH; a PDCCH carrying the same DCI; a PDCCH carrying the same downlink control information; a PDCCH candidate carrying the same DCI.

[0091] In some embodiments, detecting PDCCH repetition on a common search space may also be replaced by receiving PDCCH repetition on a common search space.

[0092] In some embodiments, the common search space includes at least one of the following: Type0-PDCCH common search space, Type0A-PDCCH common search space, Type1-PDCCH common search space, Type1A-PDCCH common search space, Type2-PDCCH common search space, Type2A-PDCCH common search space, SS0, etc.

[0093] Based on Figure 3 In the illustrated embodiment, detecting PDCCH repetition on a common search space, that is, a PDCCH repetition method provided by the embodiments of the present disclosure, supports PDCCH repetition on a common search space, thereby enhancing the coverage ability of the downlink physical channel.

[0094] As an example, the common search space includes a first search space. Detecting PDCCH repetition on the common search space may be to determine a second search space that matches the first search space, and detect PDCCH repetition on the first search space and the second search space. Among them, the first search space includes SS0.

[0095] In some embodiments, a first node receives a MIB sent by a second node and determines the first search space based on the MIB.

[0096] In some embodiments, determining a second search space that matches the first search space may be to determine a second search space that matches the first search space before the first node obtains SIB1. It can be understood that before the first node enters the connected state, a second search space that matches the first search space is determined, that is, a second search space associated with the first search space is determined, and then PDCCH repetition is detected on the first search space and the second search space.

[0097] As an example, based on a first correspondence relationship, a second search space that matches the first search space is determined. Among them, the first correspondence relationship is predefined or indicated by the network side. The first correspondence relationship may also have other names. For example, the first mapping relationship is not limited in the embodiments of the present disclosure. It should be noted that in the embodiments of the present disclosure, the network side indication may refer to the network side indicating the first node through the MIB or PBCH, which will not be elaborated below.

[0098] As a possible example, the first correspondence is the correspondence between the index of the first search space and the index of the second search space. Based on the first correspondence, determining the second search space that matches the first search space may be based on the index of the first search space and the first correspondence to determine the index of the second search space, and then based on the index of the second search space, determine the second search space.

[0099] As another possible example, the first correspondence is a functional relationship between the index of the first search space and the index of the second search space. For example, taking the index of the first search space as x, the first correspondence can be y = mod(x + n, N), where y is the index of the second search space, N is the total number of entries in the configuration information table corresponding to the first search space (SS0), and n is a predefined or network-side indicated constant. After determining the index x of the first search space, x can be input into the above first correspondence to obtain the index y of the second search space, and then based on the index y of the second search space, determine the second search space.

[0100] As another example, the first node can receive first indication information sent by the second node, and the first indication information is used to indicate the second search space that matches the first search space. The first node can determine the second search space that matches the first search space based on the first indication information. For example, the first indication information is used to indicate the index of the second search space that matches the first search space, and the first node can determine the second search space based on the index of the second search space. That is, before the first node obtains SIB1, the second node can directly send the first indication information to the first node to indicate the second search space that matches the first search space.

[0101] In some embodiments, the first indication information includes at least one of the following: MIB, PBCH. That is, the second node can indicate the second search space that matches the first search space through the MIB or PBCH.

[0102] As another example, the configuration information of the second search space is included in the configuration information table corresponding to the first search space, and the configuration information of the second search space and the configuration information of the first search space correspond to the same index. That is, the configuration information table corresponding to the first search space is modified in advance, and this configuration information table contains the configuration information of two sets of search spaces. The configuration information of the second search space is added to the configuration information table corresponding to the first search space. The configuration information of the second search space and the configuration information of the first search space correspond to the same index, that is, the configuration information of the second search space corresponds to the index corresponding to the configuration information of the first search space. In this way, the first node can determine the second search space based on the configuration information table corresponding to the first search space and the index of the first search space.

[0103] Exemplarily, it can be as shown in Table 3 below:

[0104] Table 3

[0105]

[0106] Among them, in Table 3 above, "Number of search space sets per slot" represents the number of search space sets per time slot, "First symbol index" represents the first symbol index, and M is a parameter in the formula for determining the occasion of the first search space, which is used to control the interval of PDCCH occasions corresponding to SSBs with different Indexes. For example, when M = 1 / 2, it means that every 2 SSB indexes correspond to the same occasion. When M = 1, it means that the start time of the occasion corresponding to each SSB is on consecutive slots (but because a PDCCH needs to be detected on two slots, the PDCCH search windows of different SSBs overlap). When M = 2, the search windows can be completely staggered.

[0107] It can be seen from Table 3 above that in the original configuration information table, the option with Index 0 only corresponds to 0. After adding the configuration information of the second search space to the original configuration information table, in the updated configuration information table, the option with Index 0 only corresponds to 0 and 2.

[0108] In some embodiments, taking the first search space as SS0 as an example, the configuration information table corresponding to the first search space can be Table 13-11. The related art description of Table 13-11 is as follows:

[0109] Parameters for PDCCH monitoring occasions for Type0-PDCCH CSS set-SS / PBCH block and CORESET multiplexing pattern 1and FR1. The Chinese meaning is: Parameters for PDCCH monitoring occasions for Type0-PDCCH common search space set-SS / PBCH block and CORESET multiplexing pattern 1 and FR1. FR1 refers to frequency range 1. It should be noted that Parameters for PDCCH monitoring occasions for Type0-PDCCH CSS set is the general title of the configuration information table corresponding to SS0, and SS / PBCH block and CORESET multiplexing pattern 1and FR1 are suffixes for different scenarios. That is, in different scenarios, SS0 can correspond to different configuration information tables. That is to say, in different scenarios, the first node can query the configuration information of the first search space based on different configuration information tables.

[0110] As another example, the configuration information of the second search space and the configuration information of the first search space are included in different configuration information tables, and the index of the second search space is the same as the index of the first search space. That is to say, a configuration information table corresponding to the second search space is newly added in advance, and each configuration information table contains the configuration information of a set of search spaces. The configuration information of the first search space is included in the configuration information table corresponding to the first search space, and the configuration information of the second search space is included in the configuration information table corresponding to the second search space. The index of the first search space in the configuration information table corresponding to the first search space is the same as the index of the second search space in the configuration information table corresponding to the second search space. It should be understood that by configuring the index of the second search space to be the same as the index of the first search space, the first search space is associated with the second search space. In this way, the first node can determine the second search space from the newly added configuration information table corresponding to the second search space based on the index of the first search space.

[0111] In some embodiments, the first search space and the second search space satisfy at least one of the following:

[0112] The first search space and the second search space have the same period;

[0113] The first search space and the second search space have the same offset;

[0114] When the first search space and the second search space correspond to the same control resource set, the first search space and the second search space do not overlap in the time domain;

[0115] The first search space and the second search space correspond to the same control resource set, or correspond to different control resource sets.

[0116] Among them, when the first search space and the second search space correspond to the same control resource set, taking the first search space as SSO as an example, that is, the first search space and the second search space correspond to CORESET0. It should be understood that when the first search space and the second search space correspond to the same control resource set, the flexibility of the search space association configuration can be improved.

[0117] When the first search space and the second search space correspond to different control resource sets, it may be that after the first node determines the second search space that matches the first search space, it determines the control resource set corresponding to the second search space.

[0118] As an example, the first node determines the control resource set corresponding to the second search space that matches the first search space based on the second correspondence. Among them, the second correspondence is predefined or indicated by the network side.

[0119] As a possible example, the second correspondence is the correspondence between the index of the control resource set corresponding to the first search space and the index of the control resource set corresponding to the second search space. Based on the second correspondence, to determine the control resource set corresponding to the second search space that matches the first search space, it may be to determine the index of the control resource set corresponding to the second search space based on the index of the control resource set corresponding to the first search space and the second correspondence, and then determine the control resource set corresponding to the second search space based on the index of the control resource set corresponding to the second search space.

[0120] As another possible example, the second correspondence is a functional relationship between the index of the control resource set corresponding to the first search space and the index of the control resource set corresponding to the second search space. For the description of the functional relationship, reference may be made to the corresponding description of the functional relationship in the first correspondence above, which will not be elaborated here.

[0121] As another example, the first node may receive indication information sent by the second node for indicating the control resource set corresponding to the second search space, and then determine the control resource set corresponding to the second search space based on the indication information. The indication information includes at least one of the following: MIB, PBCH.

[0122] As another example, the configuration information of the control resource set corresponding to the second search space is included in the configuration information table corresponding to the control resource set corresponding to the first search space, and the configuration information of the control resource set corresponding to the second search space and the configuration information of the control resource set corresponding to the first search space correspond to the same index. That is to say, the configuration information table corresponding to the control resource set corresponding to the first search space is pre-modified, and the configuration information table contains the configuration information of the control resource sets corresponding to two sets of search spaces.

[0123] The configuration information of the control resource set corresponding to the second search space is added to the configuration information table corresponding to the control resource set corresponding to the first search space. The configuration information of the control resource set corresponding to the second search space and the configuration information of the control resource set corresponding to the first search space correspond to the same index, that is, the configuration information of the control resource set corresponding to the second search space corresponds to the index corresponding to the configuration information of the control resource set corresponding to the first search space. In this way, the first node can determine the control resource set corresponding to the second search space based on the configuration information table corresponding to the control resource set corresponding to the first search space and the index corresponding to the control resource set corresponding to the first search space.

[0124] Exemplarily, taking the first search space as SS0, the configuration information table corresponding to the control resource set corresponding to the first search space can be Table 13-1, and the description of Table 13-1 can be as follows:

[0125] Set of resource blocks and slot symbols of CORESET for Type0-PDCCH search space set when {SS / PBCH block, PDCCH} SCS is {15,15} kHz for frequency bands with minimum channel bandwidth 5MHz or 10MHz or with minimum channel bandwidth 3MHz and channel bandwidth larger than 3MHz.

[0126] The relevant translation is as follows:

[0127] When the subcarrier spacing (SCS) of {SS / PBCH block, PDCCH} is {15, 15} kHz, for a frequency band with a minimum channel bandwidth of 5 MHz or 10 MHz, or a frequency band with a minimum channel bandwidth of 3 MHz but a channel bandwidth greater than 3 MHz, the set of resource blocks and time slot symbols of the CORESET (control resource set) of the Type0-PDCCH search space set.

[0128] It should be noted that in different scenarios, the control resource set corresponding to SS0 can correspond to different configuration information tables. That is, in different scenarios, the first node can query the configuration information of the control resource set corresponding to the first search space based on different configuration information tables.

[0129] As another example, the configuration information of the control resource set corresponding to the second search space and the configuration information of the control resource set corresponding to the first search space are included in different configuration information tables, and the index of the control resource set corresponding to the second search space is the same as the index of the control resource set corresponding to the first search space. That is, a configuration information table corresponding to the control resource set corresponding to the second search space is newly added in advance, and each configuration information table contains the configuration information of the control resource set corresponding to a set of search spaces. The configuration information of the control resource set corresponding to the first search space is included in the configuration information table corresponding to the control resource set corresponding to the first search space, and the configuration information of the control resource set corresponding to the second search space is included in the configuration information table corresponding to the control resource set corresponding to the second search space. The index of the control resource set corresponding to the first search space in the configuration information table corresponding to the control resource set corresponding to the first search space is the same as the index of the control resource set corresponding to the second search space in the configuration information table corresponding to the control resource set corresponding to the second search space. It should be understood that by configuring the index of the control resource set corresponding to the second search space to be the same as the index of the control resource set corresponding to the first search space, the control resource set corresponding to the first search space is associated with the control resource set corresponding to the second search space. In this way, the first node can determine the control resource set corresponding to the second search space from the newly added configuration information table corresponding to the control resource set corresponding to the second search space based on the index of the control resource set corresponding to the first search space.

[0130] It should be understood that from the above description of the random access process, it can be seen that before the terminal obtains SIB1, it can only obtain the configuration of an SS0 / Type0A-PDCCH CSS through the MIB, and there is no other SS associated with SS0. Based on this, compared with the related art where it is impossible to associate SS0 with other SSs before the terminal obtains SIB1, the embodiments of the present disclosure propose to determine a second search space that matches the first search space before the first node obtains SIB1, that is, to determine the second search space associated with SS0, and then detect PDCCH repetitions on the first search space and the second search space, which can enhance the coverage ability of the downlink physical channel.

[0131] In some embodiments, the resource mapping of the PDCCH repetition on the first search space and the second search space is the same. That is to say, the time domain resources and / or frequency domain resources occupied by the PDCCH repetition on the first search space are the same as the time domain resources and / or frequency domain resources occupied on the second search space. Detecting the PDCCH repetition on the first search space and the second search space includes detecting the PDCCH repetition at the same time domain position and / or frequency domain position in the first search space and the second search space.

[0132] In some embodiments, detecting the PDCCH repetition on the associated search space, that is, detecting the PDCCH repetition on the first search space and the second search space, includes detecting the PDCCH repetition at the detection opportunities with the same index in the first search space and the second search space.

[0133] In some embodiments, detecting the PDCCH repetition on the associated search space includes detecting the PDCCH repetition at the same time domain position and / or frequency domain position on the CORESET corresponding to the first search space and the CORESET corresponding to the second search space. Or, it can also be said that the resource mapping of the PDCCH repetition on the CORESET corresponding to the first search space and the CORESET corresponding to the second search space is the same. For example, it is mapped to the same CCE or resource element group (REG), or mapped to the CCE or REG with the same index. It should be noted that in this case, it may be necessary for the PDCCH to have the same aggregation level, or the same CCE-to-REG mapping relationship (interleaved or non-interleaved), or the same REG bundling size. The CORESET size may also need to be the same.

[0134] Exemplarily, Figure 4 A schematic diagram for detecting PDCCH repetition provided by the embodiments of the present disclosure is shown in Figure 4, the resources mapped by PDCCH1 occupy 0 - 5 in the control resource set corresponding to search space 1, and the resources mapped by PDCCH2 occupy 12 - 23 in the control resource set corresponding to search space 1. The resources mapped by PDCCH2 also occupy 0 - 5 in the control resource set corresponding to search space 2, and the resources mapped by PDCCH2 also occupy 12 - 23 in the control resource set corresponding to search space 2. It can be seen that the time-domain resources and frequency-domain resources occupied by PDCCH repetition in search space 1 are the same as those occupied in search space 2.

[0135] It should be understood that the resource mapping of PDCCH repetition in the first search space and the second search space is the same, or the resource mapping of PDCCH repetition in the CORESE corresponding to the first search space and the CORESET corresponding to the second search space is the same, which can reduce the number of search times during the blind detection of the first node, thereby reducing the power consumption of the first node.

[0136] The above is described by taking the example of enhancing the coverage of the downlink control channel by detecting PDCCH repetition in the first search space and the second search space after obtaining SIB1. In some embodiments, the coverage of the downlink control channel can also be enhanced by introducing PDCCH repetition in the same SS.

[0137] Still taking the public search space including the first search space as an example, in some embodiments, detecting PDCCH repetition on the public search space includes: detecting PDCCH repetition based on the detection opportunity indicated by the first search space.

[0138] As an example, receive PDCCH repetition on at least two time slots after the detection opportunity indicated by the first search space. It should be understood that in the related art, the detection window of Type0-PDCCH starts from the detection opportunity indicated by Type0-PDCCH CSS and lasts for two time slots (which may be two consecutive time slots or two time slots with a certain interval). However, the related art currently does not support the first node receiving PDCCH repetition from these two time slots (that is, the first node only detects PDCCH separately in each time slot). Therefore, allowing the second node to send PDCCH repetition on these two time slots can enhance the coverage of the downlink control channel. Correspondingly, the first node receives PDCCH repetition on at least two time slots after the detection opportunity indicated by the first search space, combines the PDCCH repetition received on the at least two time slots to obtain the combined PDCCH repetition, and detects the combined PDCCH repetition, thereby enhancing the coverage of the downlink control channel.

[0139] In the above example, the first search space includes SS0.

[0140] As another example, on N time resource units after the detection opportunity indicated by the first search space, PDCCH repetitions are detected, where N is a positive integer. Herein, the first search space is any one of the common search spaces described above.

[0141] Among them, the N time resource units include at least one of the following: N consecutive time resource units, N consecutive valid time resource units, N consecutive downlink time resource units, and time resource units included. The valid time resource unit can be understood as the time resource unit actually included in the resource mapping. N is predefined or indicated by the network side. The time resource unit includes time slots, subframes, system frames, and symbols. Taking the time resource unit as a time slot as an example, the first node can detect PDCCH transmissions on the same symbol in N time slots after the detection opportunity indicated by the first search space.

[0142] As another example, PDCCH repetitions are detected on N durations or N control resource sets after the detection opportunity indicated by the first search space. Herein, the duration is the duration of the control resource set corresponding to the first search space. For example, on N*N CORESET symbols after the detection opportunity indicated by the first search space (N CORESET is the duration of the CORESET corresponding to the first search space, in units of symbols) or on N CORESETs, PDCCH repetitions are detected. The N*N CORESET symbols include at least one of the following:

[0143] N*N consecutive CORESET symbols, N*N consecutive CORESET valid symbols, N*N consecutive CORESET downlink symbols, and symbols included. Among them, every N CORESET symbols correspond to one CORESET and need to be consecutive. For the description of valid symbols, reference can be made to the above description of valid time resource units and will not be elaborated here.

[0144] As another example, PDCCH repetitions are detected on every N detection opportunities in the detection opportunity indicated by the first search space. Herein, the N detection opportunities include at least one of the following: N consecutive detection opportunities; N consecutive valid detection opportunities; and detection opportunities included. For the description of valid detection opportunities, reference can be made to the above description of valid time resource units and will not be elaborated here.

[0145] In some embodiments, the start detection opportunity in the detection opportunity indicated by the first search space is the one indicated by the network side, predefined, or the first detection opportunity after the reference time. The reference time includes the start time of at least one of the following: hyperframe number 0 (H-SFN0), system frame number 0 (SFN0), subframe 0, slot 0, symbol 0.

[0146] As another example, on the detection opportunities within the same time resource unit in the detection opportunity indicated by the first search space, PDCCH repetitions are detected.

[0147] It should be noted that the above enhances the coverage of the downlink control channel in the way of PDCCH repetition. In some embodiments, the coverage of the downlink control channel can also be enhanced by increasing the size of the control resource set, and the PDCCH detection performance can be improved by reducing the PDCCH code rate. Increasing the size of the control resource set can be using new parameters, such as introducing a new aggregation level (AL), duration, frequency domain width, etc. Among them, the new parameters can be predefined or indicated by the network side. Predefining new parameters can be achieved by directly predefining a new parameter or by modifying / adding the configuration information table corresponding to the first search space.

[0148] For example, directly predefine a certain parameter. For example, predefine the repetition number N of PDCCH repetition. The first node can determine the configuration information of the first search space or PDCCH repeated transmission through the predefined parameter.

[0149] Again, for example, add a new column to the configuration information table corresponding to the first search space. The added column is used to indicate the predefined parameter. For example, it can be as shown in Table 4 below:

[0150] Table 4

[0151]

[0152] Among them, Repetition number in Table 4 above represents the repetition number. For the descriptions of other parameters in Table 4, reference can be made to the corresponding descriptions in Tables 1 to 3 above, which will not be elaborated here.

[0153] For another example, a new entry is added to the configuration information table corresponding to the first search space, or an existing entry is modified, and the new or modified entry is used to indicate a predefined parameter. Exemplarily, as shown in Table 5 below, an entry originally marked as reserved is modified to a new configuration including the number of repetitions of PDCCH repetition.

[0154] Table 5

[0155]

[0156] For another example, a new configuration information table is added. Exemplarily, a configuration information table including the number of repetitions of PDCCH repetition is added. When the first node supports PDCCH repetition, the first node can determine the SS or CORESET based on the new configuration information table.

[0157] It should be noted that the network side (i.e., the second node) can indicate whether the first node uses the above-mentioned predefined new parameters.

[0158] The network side indicates the new parameters, which can be indicated by the network side through the MIB or the PBCH. Among them, indicating through the MIB can be reinterpreting the bit field of the existing MIB, or introducing a new bit field in the MIB, or expanding the existing MIB bit field to indicate the new parameters. Indicating through the PBCH can be reinterpreting the additional bit field of the existing PBCH, or introducing an additional bit field of the new PBCH, to indicate the new parameters. Among them, the additional bit field of the PBCH is information independent of the MIB, and will be added after the MIB / PBCH data sequence, interleaved together, and then transmitted to the first node as the payload of the PBCH. Correspondingly, the first node receives the additional bit field of the PBCH transmitted by the network side.

[0159] In the embodiments of the present disclosure, before obtaining SIB1, by determining the second search space related to the first search space, and then detecting PDCCH repetition on the first search space and the second search space, the ability of the downlink control channel is enhanced in the NTN scenario.

[0160] In the above embodiments, an example is given in which, before the first node obtains SIB1, the coverage ability of the downlink control channel is enhanced by associating the first search space with the second search space or introducing PDCCH repetition in the same search space. In some embodiments, after the first node obtains SIB1, PDCCH-ConfigCommon can be obtained, which includes configurations such as Type0A-PDCCH CSS (searchSpaceOtherSystemInformation), Type1-PDCCH CSS (ra-SearchSpace), Type1A-PDCCH CSS (sdt-SearchSpace), Type2-PDCCH CSS (pagingSearchSpace), etc. Moreover, PDCCH-ConfigCommon can also include the configuration of Type0-PDCCH CSS (searchSpaceSIB1, searchSpaceZero). Therefore, after SIB1 is obtained, the associated search space can also be determined in an explicit manner.

[0161] Based on this, as an example, after obtaining SIB1, the first node receives second indication information sent by the second node, and the second indication information is used to indicate the associated search space in the common search space; PDCCH repetition is detected on the associated search space indicated by the second indication information. Wherein, the second indication information includes at least one of the following: system information block SIB; dedicated radio resource control (RRC) signaling; media access control control element (MAC CE) signaling; downlink control information DCI.

[0162] Taking the common search space including the first search space as an example, as another example, after obtaining SIB1, the first node determines a second search space having the same association identifier as the first search space; PDCCH repetition is detected on the first search space and the second search space.

[0163] In some embodiments, when the first search space is SS0, the association identifier of the first search space is predefined.

[0164] It should be understood that in the related art, SS0 determines the configuration of SSO by configuring an index and then querying a configuration information table, while other SSs in the common search space except SS0 can directly configure information such as period, offset, start time, and association identifier. Therefore, it is difficult to directly include an association indicator such as an association identifier (searchSpaceLinkingID) in SS0. Therefore, the association identifier of SS0 can be predefined. For example, the association identifier of SS0 is predefined as x. When the association identifier of SS0 is X, if the association identifier of one SS in other SSs is x, it indicates that the SS is associated with SS0, and the first node can determine that the SS is an SS associated with SS0 and can perform PDCCH detection on SS0 and the associated SS.

[0165] For SSs other than SS0, the method in the related art can be reused, that is, the association identifier is indicated in the SS configuration. Two SSs with the same association identifier are associated, and PDCCH repetition detection can be performed on the associated SSs. That is, the current configuration of associated SSs mainly for connected UEs is extended to various CSSs (including the above various types of PDCCH CSSs). It should be noted that the association identifier of the search space needs to be indicated in SIB1, that is, SIB1 is used to indicate the association identifier of the common search space.

[0166] In the embodiment of the present disclosure, after obtaining SIB1, the first node detects PDCCH repetition on the associated search space, realizing enhanced coverage of the downlink control channel in the NTN scenario.

[0167] The above embodiment is described by taking the first node directly detecting PDCCH repetition on the common search space as an example. In some embodiments, before the first node detects PDCCH repetition on the common search space, the first node can determine whether to detect PDCCH repetition on the common search space. When it is determined to detect PDCCH repetition on the common search space, PDCCH repetition is detected on the common search space. That is, the first node determines whether the capability of the first node supports detecting PDCCH repetition on the common search space. When the first node determines that the capability of the first node supports detecting PDCCH repetition on the common search space, PDCCH repetition is detected on the common search space.

[0168] As an example, the first node may determine whether to detect PDCCH repetitions in the common search space. It may be that when the first node supports a preset frequency band, preset feature, preset parameter, or preset parameter set, the first node determines to detect PDCCH repetitions in the common search space. Among them, the preset frequency band, preset feature, preset parameter, or preset parameter set is predefined or indicated by the network side. For example, when the first node determines to access the NTN network with limited downlink budget, the first node determines that its capability supports detecting PDCCH repetitions in the common search space, and the first node determines to detect PDCCH repetitions in the common search space.

[0169] As another example, the first node may determine whether to detect PDCCH repetitions in the common search space in a signaling interaction manner. For example, receive the third indication information sent by the second node, where the third indication information is used to indicate whether to detect PDCCH repetitions in the common search space; when the third indication information is used to indicate detecting PDCCH repetitions in the common search space, detect PDCCH repetitions in the common search space. Among them, the third indication information includes at least one of the following: Physical Broadcast Channel PBCH, Master Information Block MIB. For example, taking the third indication information as MIB as an example, expand the indication field of SS0 in the MIB, and the newly added bit is used to indicate whether to use the newly added configuration information table to determine the configuration information of SS0, that is, to indicate whether to detect PDCCH repetitions in the common search space.

[0170] As another example, the first node may determine whether to detect PDCCH repetitions in the common search space based on blind detection. For example, the first node performs blind detection and attempts to detect PDCCH on at least one SS configuration (such as a traditional SS configuration, an SS configuration with a repetition count of 2, an SS configuration with a repetition count of 4, etc.). If the network side uses an enhanced SS configuration (such as using an SS configuration with a repetition count of 4), the first node can obtain a gain in PDCCH detection under this configuration. The first node may thereby determine whether the network side uses an enhanced SS configuration, or what kind of SS configuration is used (such as the repetition count of the PDCCH repetition used).

[0171] It should be noted that the related art does not support the retransmission of SIB1 either. In the case of weak downlink coverage, the reception of SIB1 may also need to be enhanced. For example, the PDSCH containing SIB1 is retransmitted. When the PDCCH needs to enhance the coverage performance, SIB1 usually also needs to enhance the coverage. Therefore, it is possible to consider associating SIB1 with the PDCCH. Based on this, detecting the physical downlink control channel PDCCH retransmission in the common search space includes: detecting the PDCCH retransmission in the common search space and detecting the SIB1 retransmission. In this way, the coverage ability of SIB1 can be enhanced.

[0172] It should be understood that since SIB1 is included in the PDSCH, detecting the SIB1 retransmission can be replaced by detecting the PDSCH retransmission.

[0173] In some embodiments, the number of repetitions of the PDCCH retransmission and the number of repetitions of the SIB1 retransmission (which can also be replaced by the number of repetitions of the PDSCH) satisfy a third correspondence relationship, where the third correspondence relationship is predefined or indicated by the network side.

[0174] Exemplarily, taking the third correspondence relationship as the functional relationship between the number of repetitions of the PDCCH retransmission and the number of repetitions of the SIB1 retransmission as an example, for example, the functional relationship can be M = N + k or M = kN, where N is the number of repetitions of the PDCCH retransmission, M is the number of repetitions of the PDSCH retransmission or the number of repetitions of SIB1, and k is a predefined constant or a constant indicated by the network side, and the value of k is a positive number, a negative number or zero. Another example is that the functional relationship can be M = kN + m, where k and m are predefined constants or constants indicated by the network side.

[0175] In some embodiments, SIB1 includes multiple common control resource sets (common CORESET). It should be understood that in the related art, at least in the multi-transmission and reception point (multi-TRP) scenario, it is required that the SS associated with the PDCCH retransmission corresponds to different CORESETs. However, currently only one CORESET0 and one common CORESET can be configured in SIB1. Therefore, the associated configuration of the SS is very limited. Therefore, in order to improve the flexibility of the associated configuration of the SS, the embodiments of the present disclosure propose that SIB1 includes multiple common control resource sets, thereby improving the flexibility of the associated configuration of the SS.

[0176] The above embodiments are described from the perspective of the first node as an example. In some embodiments, as Figure 5 shown, the embodiments of the present disclosure also provide a PDCCH retransmission method, which is applied to a second node, and the second node can be the aboveFigure 2 The base station 31 shown, the method may include the following steps:

[0177] S201. Transmit PDCCH repetitions on the common search space.

[0178] Among them, transmitting PDCCH repetitions may be replaced by transmitting PDCCH repetitions. For the description of the common search space and PDCCH repetitions, reference may be made to the corresponding descriptions in the embodiments shown above Figure 3 and will not be elaborated here.

[0179] In the embodiments of the present disclosure, the second node transmits PDCCH repetitions on the common search space, that is, a PDCCH repetition method provided by the embodiments of the present disclosure supports PDCCH repetitions on the common search space. Thus, the coverage ability of the downlink physical channel is enhanced.

[0180] As an example, the common search space includes a first search space. Taking the first search space as SS0, the second node determines a second search space that matches the first search space; and transmits PDCCH repetitions on the first search space and the second search space. The second node determines a second search space that matches the first search space, which may be based on a first correspondence relationship to determine a second search space that matches the first search space. The first correspondence relationship is predefined or indicated by the network side. Thus, compared with the related art where SS0 cannot be associated with other SSs, in the embodiments of the present disclosure, by predefining or indicating the first correspondence relationship by the network side, the second node can determine a second search space that matches the first search space based on the first correspondence relationship, and then transmit PDCCH repetitions on the first search space and the second search space, which can enhance the coverage ability of the downlink physical channel.

[0181] In some embodiments, in order to facilitate the first node to determine the second search space associated with the first search space, before sending SIB1 to the first node, the second node sends first indication information, and the first indication information is used to indicate the second search space that matches the first search space.

[0182] In some embodiments, the configuration information of the second search space is included in the configuration information table corresponding to the first search space, and the configuration information of the second search space and the configuration information of the first search space correspond to the same index. For the description of this example, reference may be made to the corresponding descriptions in the embodiments shown above Figure 3 and will not be elaborated here.

[0183] In some embodiments, the configuration information of the second search space and the configuration information of the first search space are included in different configuration information tables, and the index of the second search space is the same as the index of the first search space. For the description of this example, reference may be made to the corresponding descriptions in the embodiments shown aboveFigure 3 The corresponding description in the embodiments shown is not elaborated herein.

[0184] In some embodiments, the first search space and the second search space satisfy at least one of the following:

[0185] The first search space and the second search space have the same period;

[0186] The first search space and the second search space have the same offset;

[0187] When the first search space and the second search space correspond to the same control resource set, the first search space and the second search space do not overlap in the time domain;

[0188] The first search space and the second search space correspond to the same control resource set, or, correspond to different control resource sets.

[0189] In some embodiments, the resource mapping of the PDCCH repetition on the first search space and the second search space is the same. That is, the time domain resources and / or frequency domain resources occupied by the PDCCH repetition on the first search space are the same as the time domain resources and / or frequency domain resources occupied by the PDCCH repetition on the second search space. Sending the PDCCH repetition on the first search space and the second search space includes sending the PDCCH repetition at the same time domain position and / or frequency domain position in the first search space and the second search space.

[0190] In some embodiments, sending the PDCCH repetition in the associated search space, that is, sending the PDCCH repetition in the first search space and the second search space, includes sending the PDCCH repetition at the detection occasions with the same index in the first search space and the second search space.

[0191] In some embodiments, sending the PDCCH repetition in the associated search space includes sending the PDCCH repetition at the same time domain position and / or frequency domain position on the CORESE corresponding to the first search space and the CORESET corresponding to the second search space. Or, it can also be said that the resource mapping of the PDCCH repetition on the CORESE corresponding to the first search space and the CORESET corresponding to the second search space is the same. For the specific description of this example, reference can be made to the corresponding description in the embodiments shown above Figure 3 The corresponding description in the embodiments shown is not elaborated herein.

[0192] As another example, the common search space includes the first search space, and the first search space can be any one of the common search spaces shown in the above examples; sending the PDCCH repetition on the common search space includes: sending the PDCCH repetition based on the detection occasion indicated by the first search space.

[0193] As a possible example, PDCCH repetitions are sent on at least two time slots after the detection occasion indicated by the first search space. It should be understood that in the related art, the detection window of Type0-PDCCH starts from the detection occasion indicated by the Type0-PDCCH CSS and lasts for two time slots (which may be two consecutive time slots or two time slots with a certain interval). However, in the current related art, the first node is not supported to receive PDCCH repetitions from these two time slots (that is, the first node only separately detects PDCCH in each time slot). Therefore, the second node sending PDCCH repetitions on at least two time slots after the detection occasion indicated by the first search space can enhance the coverage ability of the downlink control channel.

[0194] As another possible example, PDCCH repetitions are sent on N time resource units after the detection occasion indicated by the first search space, where N is a positive integer. Among them, the N time resource units include at least one of the following: N consecutive time resource units; N consecutive valid time resource units; N consecutive downlink time resource units; counted time resource units. For the description of time resource units, reference can be made to the corresponding description in the embodiment shown above Figure 3 and will not be elaborated here.

[0195] As another possible example, PDCCH repetitions are sent on N durations or N control resource sets after the detection occasion indicated by the first search space. Among them, the duration is the duration of the control resource set corresponding to the first search space. For example, PDCCH repetitions are sent on N*N CORESET symbols (N CORESET is the duration of the CORESET corresponding to the first search space, in units of symbols) or N CORESETs after the detection occasion indicated by the first search space. The N*N CORESET symbols include at least one of the following:

[0196] N*N CORESET consecutive symbols, N*N CORESET consecutive valid symbols, N*N CORESET consecutive downlink symbols, counted symbols. Among them, every N CORESET symbols correspond to one CORESET and need to be consecutive. For the description of valid symbols, reference can be made to the description of valid time resource units above and will not be elaborated here.

[0197] As another possible example, on every N detection opportunities among the detection opportunities indicated by the first search space, PDCCH repetitions are sent, where N is a positive integer. Among them, the N detection opportunities include at least one of the following: N consecutive detection opportunities; N consecutive valid detection opportunities; counted detection opportunities.

[0198] In some embodiments, the starting detection opportunity among the detection opportunities indicated by the first search space is indicated by the network side, predefined, or the first detection opportunity after the reference time. Among them, the reference time includes the start time of at least one of the following: hyperframe number 0, system frame number 0, subframe 0, time slot 0, symbol 0.

[0199] As another possible example, on the detection opportunities within the same time resource unit among the detection opportunities indicated by the first search space, PDCCH repetitions are sent.

[0200] In some embodiments, in order to facilitate the first node to determine the associated search space, after sending SIB1 to the first node, the second node sends second indication information to the first node, and the second indication information is used to indicate the associated search space in the common search space. Among them, the second indication information includes at least one of the following: system information block, dedicated radio resource control signaling, media access control control element signaling, downlink control information.

[0201] In some embodiments, after sending SIB1 to the first node, the second node determines a second search space having the same association identifier as the first search space, and then sends PDCCH repetitions on the first search space and the second search space. It should be noted that when the first search space is SS0, the association identifier of the first search space is predefined.

[0202] In some embodiments, when the second node determines that the capability of the first node supports detecting PDCCH repetitions in the common search space, PDCCH repetitions are sent in the common search space. The second node determines that the capability of the first node supports detecting PDCCH repetitions in the common search space, which may be that the second node determines that the capability of the first node supports detecting PDCCH repetitions in the common search space when determining that the first node supports a preset frequency band, preset features, preset parameters, or preset parameter set.

[0203] In some embodiments, the second node sends third indication information to the first node. Correspondingly, the first node receives the third indication information sent by the second node. The third indication information is used to indicate whether to detect PDCCH repetitions in the common search space. When the second node determines that the capabilities of the first node support detecting PDCCH repetitions in the common search space, the third indication information is used to indicate that the first node detects PDCCH repetitions in the common search space. When the second node determines that the capabilities of the first node do not support detecting PDCCH repetitions in the common search space, the third indication information is used to indicate that the first node does not detect PDCCH repetitions in the common search space. Wherein, the third indication information includes at least one of the following: physical broadcast channel; master information block.

[0204] In some embodiments, to improve the flexibility of search space association configuration, sending physical downlink control channel (PDCCH) repetitions in the common search space includes: sending PDCCH repetitions in the common search space, and sending system information block 1 (SIB1) repetitions. Wherein, the repetition times of the PDCCH repetitions and the repetition times of the SIB1 repetitions satisfy a third corresponding relationship, and the third corresponding relationship is predefined or indicated by the network side. For the manner of sending SIB1 repetitions, reference can be made to Figure 5 the description of the manner of sending PDCCH repetitions in the embodiments shown, which will not be elaborated herein.

[0205] In some embodiments, the system information block 1 includes multiple common control resource sets, so as to improve the flexibility of search space association configuration.

[0206] The above mainly introduces the solution provided by the present disclosure from the perspective of the interaction between each node. It can be understood that each node, such as the first node or the second node, includes corresponding hardware structures and / or software modules for implementing the above functions. Those skilled in the art should easily realize that, combining the algorithm steps of each example described in the embodiments disclosed in this article, the present disclosure can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is executed in the way of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the present disclosure.

[0207] Embodiments of the present disclosure may divide functional modules for the first node or the second node according to the above method embodiments. For example, each functional module may be divided corresponding to each function, or two or more functions may be integrated into one functional module. The above integrated module may be implemented in the form of hardware or in the form of software. It should be noted that the division of modules in the embodiments of the present disclosure is illustrative, only a logical function division, and there may be other division methods in actual implementation. The following takes the example of dividing each functional module corresponding to each function for illustration.

[0208] Figure 6 It is a schematic diagram of the composition of a communication device provided by an embodiment of the present disclosure. As Figure 6 shown, the communication device 30 includes a processing unit 301. In some embodiments, the communication device 30 further includes a receiving unit 302.

[0209] The communication device 30 may be the above-mentioned first node or a chip in the first node. When the communication device 30 is used to implement the functions of the first node in the above embodiments, each unit is specifically used to implement the following functions.

[0210] The processing unit 301 is used to detect physical downlink control channel PDCCH repetitions in the common search space.

[0211] In some embodiments, the common search space includes a first search space. The processing unit 301 is specifically used to: determine a second search space that matches the first search space; detect PDCCH repetitions in the first search space and the second search space.

[0212] In some embodiments, the processing unit 301 is specifically used to determine a second search space that matches the first search space based on a first correspondence.

[0213] In some embodiments, the processing unit 301 is further used to determine a control resource set corresponding to the second search space that matches the first search space based on a second correspondence.

[0214] In some embodiments, the receiving unit 302 is used to receive first indication information sent by the second node, and the first indication information is used to indicate a second search space that matches the first search space.

[0215] The processing unit 301 is further used to determine a second search space that matches the first search space based on the first indication information.

[0216] In some embodiments, the common search space includes a first search space. The processing unit 301 is specifically used to detect PDCCH repetitions based on the detection occasion indicated by the first search space.

[0217] In some embodiments, the processing unit 301 is specifically configured to receive PDCCH repetitions on at least two time slots after the detection opportunity indicated by the first search space.

[0218] In some embodiments, the processing unit 301 is specifically configured to detect PDCCH repetitions on N time resource units after the detection opportunity indicated by the first search space, where N is a positive integer.

[0219] In some embodiments, the processing unit 301 is specifically configured to detect PDCCH repetitions on every N detection opportunities among the detection opportunities indicated by the first search space, where N is a positive integer.

[0220] In some embodiments, the processing unit 301 is specifically configured to detect PDCCH repetitions on the detection opportunities within the same time resource unit among the detection opportunities indicated by the first search space.

[0221] In some embodiments, the receiving unit 302 is configured to receive second indication information sent by a second node, where the second indication information is used to indicate an associated search space in the common search space.

[0222] The processing unit 301 is further configured to detect PDCCH repetitions on the associated search space indicated by the second indication information.

[0223] In some embodiments, the common search space includes a first search space, and the processing unit 301 is specifically configured to: determine a second search space having the same association identifier as the first search space; and detect PDCCH repetitions on the first search space and the second search space.

[0224] In some embodiments, the receiving unit 302 is configured to receive third indication information sent by a second node, where the third indication information is used to indicate whether to detect PDCCH repetitions on the common search space.

[0225] The processing unit 301 is further configured to detect PDCCH repetitions on the common search space when the third indication information is used to indicate detecting PDCCH repetitions on the common search space.

[0226] In some embodiments, the processing unit 301 is specifically configured to detect PDCCH repetitions on the common search space and detect System Information Block 1 repetitions.

[0227] Figure 7 It is a schematic diagram of the composition of another communication device provided by an embodiment of the present disclosure. As Figure 7 shown, the communication device 40 includes a sending unit 401. In some embodiments, the communication device 40 further includes a processing unit 402.

[0228] The communication device 40 may be the second node or the chip in the second node above. When the communication device 40 is used to implement the functions of the second node in the above embodiments, each unit is specifically used to implement the following functions.

[0229] The sending unit 401 is used to send physical downlink control channel PDCCH repetitions on the common search space.

[0230] In some embodiments, the common search space includes a first search space, and the processing unit 402 is used to determine a second search space that matches the first search space.

[0231] The sending unit 401 is used to send PDCCH repetitions on the first search space and the second search space.

[0232] In some embodiments, the processing unit 402 is specifically used to determine a second search space that matches the first search space based on the first correspondence.

[0233] In some embodiments, the processing unit 402 is further used to determine the control resource set corresponding to the second search space that matches the first search space based on the second correspondence.

[0234] In some embodiments, the sending unit 401 is further used to send first indication information, and the first indication information is used to indicate the second search space that matches the first search space.

[0235] In some embodiments, the common search space includes a first search space, and the sending unit 401 is specifically used to send PDCCH repetitions based on the detection occasion indicated by the first search space.

[0236] In some embodiments, the sending unit 401 is specifically used to send PDCCH repetitions on at least two time slots after the detection occasion indicated by the first search space.

[0237] In some embodiments, the sending unit 401 is specifically used to send PDCCH repetitions on N time resource units after the detection occasion indicated by the first search space, where N is a positive integer.

[0238] In some embodiments, the sending unit 401 is specifically used to detect PDCCH repetitions on every N detection occasions in the detection occasion indicated by the first search space, where N is a positive integer.

[0239] In some embodiments, the sending unit 401 is specifically used to send PDCCH repetitions on the detection occasions within the same time resource unit in the detection occasion indicated by the first search space.

[0240] In some embodiments, the sending unit 401 is specifically configured to send second indication information, where the second indication information is used to indicate an associated search space in the common search space.

[0241] In some embodiments, the common search space includes a first search space; the processing unit 402 is configured to determine a second search space having the same association identifier as the first search space;

[0242] The sending unit 401 is specifically configured to send PDCCH repetitions on the first search space and the second search space.

[0243] In some embodiments, the sending unit 401 is specifically configured to: send third indication information, where the third indication information is used to indicate whether to detect PDCCH repetitions on the common search space; and when the third indication information is used to indicate detecting PDCCH repetitions on the common search space, send PDCCH repetitions on the common search space.

[0244] In some embodiments, the sending unit 401 is specifically configured to send PDCCH repetitions on the common search space and send repetitions of System Information Block 1.

[0245] It should be noted that Figure 6 and Figure 7 the units in Figure 6 and Figure 7 may also be referred to as modules. For example, the sending unit may be referred to as a sending module. Additionally, in the embodiments shown in

[0246] Figure 6 and Figure 7 , the names of the respective units may not be the names shown in the figures. For example, the sending unit may also be referred to as a communication unit, and the receiving unit may also be referred to as a communication unit.

[0246] Figure 6 and Figure 7 If each unit in

[0246] Figure 6 and Figure 7 is implemented in the form of a software functional module and sold or used as an independent product, it may be stored in a computer-readable storage medium. Based on such an understanding, the technical solution of the embodiments of the present disclosure, in essence, or the part that contributes to the prior art, or all or part of this technical solution, may be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor to execute all or part of the steps of the methods of the various embodiments of the present disclosure. The storage medium storing the computer software product includes: various media such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disc that can store program code.

[0247] When the above communication device 30 or communication device 40 implements the functions of the above integrated module in the form of hardware, the embodiments of the present disclosure provide a schematic structural diagram of a communication device. As Figure 8 shown, the communication device 50 includes: a processor 502, a communication interface 503, and a bus 504. Optionally, the communication device 50 may further include a memory 501.

[0248] The processor 502 may be a central processing unit, a general-purpose processor, a digital signal processor, an application-specific integrated circuit, a field programmable gate array, or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof that can implement or execute various exemplary logical blocks, modules, and circuits described in connection with the present disclosure. It can implement or execute various exemplary logical blocks, modules, and circuits described in connection with the present disclosure. The processor 502 may also be a combination that implements a computing function, such as a combination of one or more microprocessors, a combination of a DSP and a microprocessor, etc.

[0249] The communication interface 503 is used to connect to other devices through a communication network. The communication network may be an Ethernet, a radio access network, a wireless local area network (WLAN), etc.

[0250] The memory 501 may be a read-only memory (ROM) or other types of static storage devices that can store static information and instructions, a random access memory (RAM), or other types of dynamic storage devices that can store information and instructions. It may also be an electrically erasable programmable read-only memory (EEPROM), a magnetic disk storage medium, or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and can be accessed by a computer, but is not limited thereto.

[0251] As a possible implementation, the memory 501 may exist independently of the processor 502. The memory 501 may be connected to the processor 502 through the bus 504 for storing instructions or program code. When the processor 502 calls and executes the instructions or program code stored in the memory 501, the PDCCH repetition method provided by the embodiments of the present disclosure can be implemented.

[0252] In another possible implementation, the memory 501 may also be integrated with the processor 502.

[0253] The bus 504 can be an extended industry standard architecture (EISA) bus or the like. The bus 504 can be divided into an address bus, a data bus, a control bus, etc. For the sake of convenience of representation, Figure 8 only a thick line is used to represent it in Figure 8 , but it does not mean that there is only one bus or one type of bus.

[0254] Through the description of the above embodiments, those skilled in the art can clearly understand that, for the convenience and brevity of description, only the above division of each functional module is used as an example. In practical applications, the above functions can be allocated to different functional modules according to needs, that is, the internal structure of the first node or the second node is divided into different functional modules to complete all or part of the functions described above.

[0255] The embodiments of the present disclosure also provide a computer-readable storage medium. All or part of the processes in the above method embodiments can be completed by computer instructions instructing relevant hardware. The program can be stored in the above computer-readable storage medium. When the program is executed, it can include the processes of the above method embodiments. The above computer-readable storage medium can also be an external storage device of the above first node or second node, such as a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, etc. equipped on the above first node or second node. Further, the above computer-readable storage medium can also include both the internal storage unit of the above first node or second node and the external storage device. The above computer-readable storage medium is used to store the above computer program and other programs and data required by the above first node or second node. The above computer-readable storage medium can also be used to temporarily store the data that has been output or will be output.

[0256] The embodiments of the present disclosure also provide a computer program product. The computer product includes a computer program. When the computer program product runs on a computer, the computer is caused to execute any one of the PDCCH repetition methods provided in the above embodiments.

[0257] Although the present disclosure has been described in connection with various embodiments, those skilled in the art will understand and realize other variations of the disclosed embodiments by viewing the drawings, the disclosure, and the appended claims. In the claims, the word "comprising" does not exclude other elements or steps, and "a" or "an" does not exclude a plurality. A single processor or other unit may implement several functions recited in the claims. Certain measures are recited in mutually different dependent claims, but this does not mean that these measures cannot be combined to produce good results.

[0258] Although the present disclosure has been described in connection with specific features and their embodiments, it is obvious that various modifications and combinations can be made without departing from the spirit and scope of the present disclosure. Accordingly, the present specification and the drawings are merely exemplary illustrations of the present disclosure defined by the appended claims, and are considered to cover any and all modifications, variations, combinations, or equivalents within the scope of the present disclosure. Obviously, those skilled in the art can make various changes and modifications to the present disclosure without departing from the spirit and scope of the present disclosure. Thus, if these modifications and variations of the present disclosure fall within the scope of the claims of the present disclosure and their equivalent technologies, the present disclosure is also intended to include these modifications and variations.

[0259] The above are only specific embodiments of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any changes or substitutions within the technical scope disclosed by the present disclosure should be covered by the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be subject to the protection scope of the claims.

Claims

1. A PDCCH repetition method, characterized in that: Applied to the first node, the method comprises: Physical downlink control channel PDCCH repetitions are detected in the common search space.

2. The method according to claim 1, characterized in that The common search space includes a first search space; and detecting a physical downlink control channel PDCCH repetition in the common search space includes: Determining a second search space that matches the first search space; PDCCH repetitions are detected on the first search space and the second search space.

3. The method according to claim 2, characterized in that The determining a second search space matching the first search space comprises: Based on the first corresponding relationship, the second search space matching the first search space is determined.

4. The method according to claim 3, characterized in that: The first corresponding relationship is predefined or indicated by the network side.

5. The method according to claim 3, characterized in that: The method further comprises: Based on the second corresponding relationship, a control resource set corresponding to the second search space that matches the first search space is determined.

6. The method according to claim 2, characterized in that The determining a second search space matching the first search space comprises: receiving first indication information sent by a second node, where the first indication information is used to indicate the second search space matching the first search space; Based on the first indication information, determine the second search space that matches the first search space.

7. The method according to claim 2, characterized in that The configuration information of the second search space is included in the configuration information table corresponding to the first search space, and the configuration information of the second search space and the configuration information of the first search space correspond to the same index.

8. The method according to claim 2, characterized in that: The configuration information of the second search space and the configuration information of the first search space are included in different configuration information tables, and the index of the second search space is the same as the index of the first search space.

9. The method according to claim 2, characterized in that: The first search space and the second search space satisfy at least one of the following: The first search space and the second search space have the same period; The first search space and the second search space have the same offset; When the first search space and the second search space correspond to the same control resource set, the first search space and the second search space do not overlap in the time domain; The first search space and the second search space correspond to the same control resource set, or correspond to different control resource sets.

10. The method according to claim 2, characterized in that The resource mapping of the PDCCH repetition in the first search space and the second search space is the same.

11. The method according to claim 1, characterized in that The common search space includes a first search space; and detecting a physical downlink control channel PDCCH repetition in the common search space includes: The PDCCH repetition is detected based on the detection opportunity indicated by the first search space.

12. The method according to claim 11, characterized in that The detecting PDCCH repetition based on the detection timing indicated by the first search space includes: The PDCCH repetition is received at least two time slots after the detection opportunity indicated by the first search space.

13. The method according to claim 11, characterized in that The detecting PDCCH repetition based on the detection timing indicated by the first search space includes: PDCCH repetitions are detected on N time resource units after the detection opportunity indicated by the first search space, where N is a positive integer.

14. The method according to claim 13, characterized in that The N time resource units include at least one of the following: N consecutive time resource units; N consecutive valid time resource units; N consecutive downlink time resource units; The time resource unit that is counted.

15. The method according to claim 11, characterized in that The detecting PDCCH repetition based on the detection timing indicated by the first search space includes: At every N detection occasions among the detection occasions indicated by the first search space, PDCCH repetitions are detected, where N is a positive integer.

16. The method according to claim 15, characterized in that The N detection opportunities include at least one of the following: N consecutive detection opportunities; N consecutive valid detection opportunities; The detection time is taken into account.

17. The method according to claim 11, characterized in that The starting detection timing in the detection timing indicated by the first search space is a detection timing indicated by the network side, predefined, or the first detection timing after a reference time.

18. The method according to claim 17, characterized in that The reference time includes the start time of at least one of the following: Superframe number 0; System frame number 0; Subframe 0; Time slot 0; Symbol 0.

19. The method according to claim 11, characterized in that The detecting PDCCH repetition based on the detection timing indicated by the first search space includes: PDCCH repetition is detected at a detection timing within a same time resource unit among the detection timings indicated by the first search space.

20. The method according to claim 1, characterized in that The detecting of physical downlink control channel PDCCH repetition in the common search space includes: receiving second indication information sent by a second node, where the second indication information is used to indicate an associated search space in the common search space; PDCCH repetition is detected in the associated search space indicated by the second indication information.

21. The method according to claim 20, characterized in that The second indication information includes at least one of the following: System Information Block; Dedicated radio resource control signaling; Media access control unit signaling; Downlink control information.

22. The method according to claim 1, characterized in that The common search space includes a first search space; and detecting a physical downlink control channel PDCCH repetition in the common search space includes: Determining a second search space having the same association identifier as the first search space; PDCCH repetitions are detected on the first search space and the second search space.

23. The method according to claim 22, characterized in that The association identifier of the first search space is predefined.

24. The method according to claim 1, characterized in that The detecting of physical downlink control channel PDCCH repetition in the common search space includes: receiving third indication information sent by the second node, where the third indication information is used to indicate whether to detect PDCCH repetition in the common search space; In a case where the third indication information is used to instruct to detect PDCCH repetitions in the common search space, PDCCH repetitions are detected in the common search space.

25. The method according to claim 24, characterized in that The third indication information includes at least one of the following: Physical broadcast channel; Main information block.

26. The method according to claim 1, characterized in that The detecting of physical downlink control channel PDCCH repetition in the common search space includes: PDCCH repetitions are detected on the common search space, and system information block 1 repetitions are detected.

27. The method according to claim 26, characterized in that The number of repetitions of the PDCCH repetitions and the number of repetitions of the system information block 1 repetitions satisfy a third corresponding relationship, wherein the third corresponding relationship is predefined or indicated by the network side.

28. The method according to claim 27, characterized in that The system information block 1 includes multiple common control resource sets.

29. The method according to any one of claims 2 to 9, 12 or 23, characterized in that The first search space includes search space 0.

30. A PDCCH repetition method, characterized in that: Applied to the second node, the method comprises: Physical downlink control channel PDCCH repetitions are sent on the common search space.

31. A communication device, characterized in that: include: Memory and processor; Memory and processor coupling; The memory is used to store instructions executable by the processor; When the processor executes the instructions, the method according to any one of claims 1 to 30 is performed.

32. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer instructions, and when the computer instructions are executed on a computer, the computer is caused to perform the method according to any one of claims 1 to 30.

33. A computer program product, characterized in that The computer program product comprises computer instructions, which, when executed on a computer, cause the computer to perform the method according to any one of claims 1 to 30.

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