Channel transmission method, device, and storage medium

Abstract

The present application provides a channel transmission method, a device, and a storage medium. The method comprises: a terminal device receives a first physical downlink control channel (PDCCH) repeated transmission, the first PDCCH repeated transmission corresponding to a plurality of candidate PDCCHs.

Description

Channel transmission method, device, and storage medium Technical Field

[0001] The embodiments of the present application relate to the field of mobile communication technology, and specifically to a channel transmission method and device, and a storage medium. Background Art

[0002] In related technologies, a joint transmission mechanism involving multiple base stations can be used to improve the reliability of physical downlink control channel (PDCCH) transmission. The multiple base stations here can be multiple transmission and reception points (TRPs). Specifically, the same DCI is encoded to form coded bits, which are then transmitted by multiple TRPs on the same or different time-frequency resources. Terminals can then receive multiple PDCCHs on these time-frequency resources.

[0003] The above-mentioned solution for improving the reliability of PDCCH transmission is applied to multi-TRP scenarios and is not applicable to single-base station communication scenarios.

[0004] Summary of the Invention

[0005] The embodiments of the present application provide a channel transmission method and device, and a storage medium.

[0006] The channel transmission method provided in the embodiment of the present application includes:

[0007] The terminal device receives a repeated transmission of a first physical downlink control channel PDCCH, where the repeated transmission of the first PDCCH corresponds to multiple candidate PDCCHs.

[0008] The channel transmission method provided in the embodiment of the present application includes:

[0009] The network device sends a first PDCCH repetition transmission to the terminal device, where the first PDCCH repetition transmission corresponds to multiple candidate PDCCHs.

[0010] The terminal device provided in the embodiment of the present application includes:

[0011] The first communication unit is configured to receive repeated transmissions of a first physical downlink control channel (PDCCH), where the repeated transmissions of the first PDCCH correspond to a plurality of candidate PDCCHs.

[0012] The network device provided in the embodiment of the present application includes:

[0013] The second communication unit is configured to send a first PDCCH repetition transmission to the terminal device, where the first PDCCH repetition transmission corresponds to multiple candidate PDCCHs.

[0014] The communication device provided in an embodiment of the present application may be a terminal device or a network device in the above-mentioned solution, and the communication device includes a processor and a memory. The memory is used to store a computer program, and the processor is used to call and execute the computer program stored in the memory to perform the above-mentioned channel transmission method.

[0015] The chip provided in the embodiment of the present application is used to implement the above-mentioned channel transmission method.

[0016] Specifically, the chip includes: a processor, which is used to call and run a computer program from a memory, so that a device equipped with the chip executes the above-mentioned channel transmission method.

[0017] The computer-readable storage medium provided in an embodiment of the present application is used to store a computer program, which enables a computer to execute the above-mentioned channel transmission method.

[0018] The computer program product provided in the embodiments of the present application includes computer program instructions, which enable a computer to execute the above-mentioned channel transmission method.

[0019] The computer program provided in the embodiment of the present application, when executed on a computer, enables the computer to execute the above-mentioned channel transmission method.

[0020] Through the above technical solution, the terminal device receives the repeatedly transmitted first PDCCH through multiple candidate PDCCHs, thereby realizing the repeated transmission of the first PDCCH and improving the reliability of PDCCH transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0022] FIG1 is a schematic diagram of an application scenario of an embodiment of the present application;

[0023] FIG2 is a schematic diagram of the architecture of another communication system provided in an embodiment of the present application;

[0024] FIG3 is a schematic diagram of the architecture of another communication system provided in an embodiment of the present application;

[0025] FIG4 is a schematic diagram of the architecture of another communication system provided in an embodiment of the present application;

[0026] FIG5 is a schematic diagram of the architecture of another communication system provided in an embodiment of the present application;

[0027] FIG6 is a schematic diagram of an optional flow chart of a channel transmission method provided in an embodiment of the present application;

[0028] FIG7 is a schematic diagram of an optional flow chart of a channel transmission method provided in an embodiment of the present application;

[0029] FIG8 is an optional schematic diagram of a first PDCCH monitoring opportunity provided by an embodiment of the present application;

[0030] FIG9 is an optional schematic diagram of a first PDCCH monitoring opportunity provided by an embodiment of the present application;

[0031] FIG10 is an optional schematic diagram of a first PDCCH monitoring opportunity provided by an embodiment of the present application;

[0032] FIG11 is an optional schematic diagram of a first PDCCH monitoring opportunity provided by an embodiment of the present application;

[0033] FIG12 is an optional schematic diagram of a first PDCCH monitoring opportunity provided by an embodiment of the present application;

[0034] FIG13 is an optional schematic diagram of a first PDCCH monitoring opportunity provided by an embodiment of the present application;

[0035] FIG14 is an optional schematic diagram of a first PDCCH monitoring opportunity provided by an embodiment of the present application;

[0036] FIG15 is an optional schematic diagram of a first PDCCH monitoring opportunity provided by an embodiment of the present application;

[0037] FIG16 is an optional schematic diagram of a first PDCCH monitoring opportunity provided by an embodiment of the present application;

[0038] FIG17 is a schematic diagram of an optional structure of a terminal device provided in an embodiment of the present application;

[0039] FIG18 is a schematic diagram of an optional structure of a network device provided in an embodiment of the present application;

[0040] FIG19 is a schematic structural diagram of a communication device provided in an embodiment of the present application;

[0041] FIG20 is a schematic structural diagram of a chip according to an embodiment of the present application;

[0042] Figure 21 is a schematic block diagram of a communication system provided in an embodiment of the present application. DETAILED DESCRIPTION

[0043] The following will describe the technical solutions in the embodiments of this application in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0044] Communication system scenarios include terrestrial networks (TNs) and NTNs. NTNs typically use satellite communications to provide communication services to terrestrial users. Currently, NTN systems include NR-NTN and IoT-NTN, and other NTN systems may be added in the future.

[0045] Figure 1 is a schematic diagram of the architecture of a communication system provided by an embodiment of the present application. As shown in Figure 1, communication system 100 may include terminal device 110 and network device 120. Network device 120 may communicate with terminal device 110 via an air interface. Multi-service transmission is supported between terminal device 110 and network device 120.

[0046] It should be understood that the embodiments of the present application are only illustrative of the communication system 100, but the embodiments of the present application are not limited thereto. That is, the technical solutions of the embodiments of the present application can be applied to various communication systems, such as: Long Term Evolution (LTE) system, LTE Time Division Duplex (TDD), Universal Mobile Telecommunication System (UMTS), Internet of Things (IoT) system, Narrow Band Internet of Things (NB-IoT) system, enhanced Machine-Type Communications (eMTC) system, 5G communication system (also known as New Radio (NR) communication system), or future communication systems.

[0047] In the communication system 100 shown in Figure 1, the network device 120 may be an access network device that communicates with the terminal device 110. The access network device may provide communication coverage for a specific geographical area and may communicate with the terminal device 110 (eg, UE) located within the coverage area.

[0048] The network device 120 may be an evolved Node B (eNB or eNodeB) in a Long Term Evolution (LTE) system, or a Next Generation Radio Access Network (NG RAN) device, or a base station (gNB) in an NR system, or a wireless controller in a Cloud Radio Access Network (CRAN), or the network device 120 may be a relay station, an access point, an in-vehicle device, a wearable device, a hub, a switch, a bridge, a router, or a network device in a future evolved Public Land Mobile Network (PLMN), etc.

[0049] The terminal device 110 may be any terminal device, including but not limited to a terminal device connected to the network device 120 or other terminal devices by wire or wireless connection.

[0050] For example, the terminal device 110 may refer to an access terminal, user equipment (UE), a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, a wireless communication device, a user agent, or a user apparatus. An access terminal may be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, an IoT device, a satellite handheld terminal, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with wireless communication capabilities, a computing device or other processing device connected to a wireless modem, an in-vehicle device, a wearable device, a terminal device in a 5G network, or a terminal device in a future evolution network, etc.

[0051] The terminal device 110 can be used for device-to-device (D2D) communication.

[0052] The wireless communication system 100 may further include a core network device 130 for communicating with the base station. The core network device 130 may be a 5G core network (5G Core, 5GC) device, such as an Access and Mobility Management Function (AMF), an Authentication Server Function (AUSF), a User Plane Function (UPF), or a Session Management Function (SMF). Optionally, the core network device 130 may also be an Evolved Packet Core (EPC) device of an LTE network, such as a Session Management Function + Core Packet Gateway (SMF+PGW-C) device. It should be understood that SMF+PGW-C can simultaneously implement the functions that can be implemented by SMF and PGW-C. During the network evolution process, the above-mentioned core network device may also be called other names, or a new network entity may be formed by dividing the functions of the core network, which is not limited in the embodiments of the present application.

[0053] The functional units in the communication system 100 may also establish connections and implement communication via next generation (NG) network interfaces.

[0054] For example, the terminal device establishes an air interface connection with the access network device through the Uu interface for transmitting user plane data and control plane signaling; the terminal device can establish a control plane signaling connection with the AMF through the NG interface 1 (referred to as N1); the access network device, such as the next generation wireless access base station (gNB), can establish a user plane data connection with the UPF through the NG interface 3 (referred to as N3); the access network device can establish a control plane signaling connection with the AMF through the NG interface 2 (referred to as N2); the UPF can establish a control plane signaling connection with the SMF through the NG interface 4 (referred to as N4); the UPF can exchange user plane data with the data network through the NG interface 6 (referred to as N6); the AMF can establish a control plane signaling connection with the SMF through the NG interface 11 (referred to as N11); the SMF can establish a control plane signaling connection with the PCF through the NG interface 7 (referred to as N7).

[0055] Figure 1 exemplarily shows a base station, a core network device and two terminal devices. Optionally, the wireless communication system 100 may include multiple base station devices and each base station may include other numbers of terminal devices within its coverage area, which is not limited in this embodiment of the present application.

[0056] 3GPP is researching Non-Terrestrial Network (NTN) technology. NTNs typically use satellite communications to provide communications services to users on the ground. Compared to terrestrial cellular networks, satellite communications offer many unique advantages. First, satellite communications are not restricted by user location. For example, conventional terrestrial communications cannot cover areas such as oceans, high mountains, and deserts where communications equipment cannot be deployed or where there is a sparse population. However, satellite communications, because a single satellite can cover a large area and orbits the Earth, theoretically every corner of the globe can be covered. Second, satellite communications have significant social value. Satellite communications can provide low-cost coverage in remote mountainous areas and poor, underdeveloped countries and regions, enabling people in these areas to enjoy advanced voice communications and mobile internet technologies, narrowing the digital divide with developed regions and promoting their development. Third, satellite communications offer long range, and the cost of communications does not increase significantly with increasing distance. Finally, satellite communications are highly stable and unaffected by natural disasters.

[0057] NTN technology can be combined with various communication systems. For example, NTN technology can be combined with the NR system to form an NR-NTN system. Another example is that NTN technology can be combined with the Internet of Things (IoT) system to form an IoT-NTN system. IoT-NTN systems can include NB-IoT-NTN systems and eMTC-NTN systems.

[0058] FIG2 is a schematic diagram of the architecture of another communication system provided in an embodiment of the present application.

[0059] As shown in Figure 2, a terminal device 1101 and a satellite 1102 are included, and wireless communication can be performed between the terminal device 1101 and the satellite 1102. The network formed between the terminal device 1101 and the satellite 1102 can also be referred to as an NTN. In the architecture of the communication system shown in Figure 2, the satellite 1102 can have the function of a base station, and the terminal device 1101 and the satellite 1102 can communicate directly. In the system architecture, the satellite 1102 can be referred to as a network device. In some embodiments of the present application, the communication system may include multiple network devices 1102, and each network device 1102 may include a different number of terminal devices within its coverage area, which is not limited in the embodiments of the present application.

[0060] FIG3 is a schematic diagram of the architecture of another communication system provided in an embodiment of the present application.

[0061] As shown in FIG3 , the system includes a terminal device 1201, a satellite 1202, and a base station 1203. Wireless communication can be performed between the terminal device 1201 and the satellite 1202, and communication can be performed between the satellite 1202 and the base station 1203. The network formed by the terminal device 1201, the satellite 1202, and the base station 1203 can also be referred to as an NTN. In the architecture of the communication system shown in FIG3 , the satellite 1202 may not have the function of a base station, and communication between the terminal device 1201 and the base station 1203 needs to be relayed through the satellite 1202. In this system architecture, the base station 1203 can be referred to as a network device. In some embodiments of the present application, the communication system may include multiple network devices 1203, and each network device 1203 may include a different number of terminal devices within its coverage area, which is not limited in the present embodiment. The network device 1203 may be the network device 120 in FIG1 .

[0062] It should be understood that the satellites 1102 or 1202 include but are not limited to:

[0063] Satellites in Low-Earth Orbit (LEO), Medium-Earth Orbit (MEO), Geostationary Earth Orbit (GEO), and High Elliptical Orbit (HEO) orbits, among others, can use multiple beams to provide ground coverage. For example, a single satellite can form dozens or even hundreds of beams to cover the ground. In other words, a single satellite beam can cover a ground area tens to hundreds of kilometers in diameter, ensuring satellite coverage and increasing the capacity of the entire satellite communications system.

[0064] For example, LEO satellites can have an altitude range of 500 km to 1500 km, with an orbital period of approximately 1.5 to 2 hours. The signal propagation delay for single-hop communication between users is generally less than 20 milliseconds, and the maximum satellite visibility time is 20 minutes. LEO satellites have short signal propagation distances and low link loss, requiring low transmit power from user terminals. GEO satellites can have an orbital altitude of 35,786 km and a period of 24 hours around the Earth. The signal propagation delay for single-hop communication between users is generally 250 milliseconds.

[0065] In order to ensure satellite coverage and improve the system capacity of the entire satellite communication system, satellites use multiple beams to cover the ground. A satellite can form dozens or even hundreds of beams to cover the ground; a satellite beam can cover a ground area with a diameter of tens to hundreds of kilometers.

[0066] It should be noted that Figures 1 to 3 illustrate the systems to which this application applies only by way of example. The methods described in the embodiments of this application are also applicable to other systems. Furthermore, the terms "system" and "network" are often used interchangeably herein. The term "and / or" herein simply describes an association relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, or B exists alone. Furthermore, the character " / " generally indicates that the associated objects are in an "or" relationship. It should also be understood that the term "indication" in the embodiments of this application can be direct, indirect, or indicate an associated relationship. For example, "A indicates B" can mean that A directly indicates B, for example, B can obtain information through A; it can also mean that A indirectly indicates B, for example, A indicates C, and B can obtain information through C; or it can mean that A and B have an associated relationship. It should also be understood that the term "corresponding" in the embodiments of this application can mean that two objects have a direct or indirect correspondence relationship, an associated relationship, or a relationship between an indicator and the indicated, a configuration and the configured, and so on. It should also be understood that the “predefined” or “predefined rules” mentioned in the embodiments of the present application can be implemented by pre-saving corresponding codes, tables or other methods that can be used to indicate relevant information in a device (for example, including a terminal device and a network device), and the present application does not limit its specific implementation method. For example, predefined can refer to a definition in a protocol. It should also be understood that in the embodiments of the present application, the “protocol” can refer to a standard protocol in the field of communications, such as an LTE protocol, an NR protocol, and related protocols used in future communication systems, and the present application does not limit this.

[0067] Satellites can be categorized as either transparent payload or regenerative payload based on their functionality. Transparent payload satellites only provide radio frequency filtering, frequency conversion, and amplification, transparently forwarding signals without altering the waveform of the signal being forwarded. Regenerative payload satellites, in addition to providing radio frequency filtering, frequency conversion, and amplification, can also offer demodulation / decoding, routing / conversion, and encoding / modulation, embodying some or all of the functions of a base station.

[0068] In the NTN, one or more gateways may be included for communication between satellites and terminals.

[0069] FIG4 and FIG5 are schematic diagrams showing NTN scenarios based on transparent forwarding satellites and regenerative forwarding satellites, respectively.

[0070] As shown in Figure 4, for an NTN scenario based on transparent forwarding satellites, the gateway and satellite communicate via a feeder link, and the satellite and terminal can communicate via a service link. As shown in Figure 5, for an NTN scenario based on regenerative forwarding satellites, satellites communicate via inter-satellite links, the gateway and satellite communicate via a feeder link, and the satellite and terminal can communicate via a service link.

[0071] To facilitate understanding of the technical solutions of the embodiments of the present application, the relevant technologies of the embodiments of the present application are described below. The following relevant technologies can be arbitrarily combined with the technical solutions of the embodiments of the present application as optional solutions, and they all fall within the protection scope of the embodiments of the present application.

[0072] NR system PDCCH structure design

[0073] A physical downlink control channel (PDCCH) consists of one or more control channel elements (CCEs). The number of CCEs that make up the PDCCH is called the aggregation level. Table 1 shows the aggregation levels supported by the PDCCH. A CCE consists of six resource element groups (REGs), where one REG equals the physical resources corresponding to one orthogonal frequency division multiplexing (OFDM) symbol in the time domain and one resource block (RB) in the frequency domain.

[0074] Table 1. Aggregation levels supported by PDCCH

[0075] PDCCH is transmitted in the Control-Resource Set (CORESET). A CORESET consists of RBs and time domain The REGs in a CORESET are numbered in ascending order starting from 0 in a time-domain-first manner, starting from the first OFDM symbol and the lowest RB of the CORESET.

[0076] NR system PDCCH monitoring

[0077] For each downlink bandwidth part (BWP) of the serving cell, the upper layer configures S≤10 search space sets for the terminal device. For each search space set, the following configuration information is provided:

[0078] -Search space set index s, where 0<s<40;

[0079] - CORESETp associated with the search space set s;

[0080] -PDCCH monitoring period k s time slots and PDCCH monitoring offset o s time slots;

[0081] - PDCCH monitoring pattern within a time slot, i.e., the first symbol of the CORESET used for PDCCH monitoring within the time slot;

[0082] -The number of time slots T that the search space set s lasts each time s , where T s <k s ;

[0083] - Number of candidate PDCCHs corresponding to aggregation levels L = 1, 2, 4, 8, and 16

[0084] For the search space set s, the terminal device monitors the PDCCH period k s , PDCCH monitoring offset o s and the PDCCH monitoring pattern in the time slot to determine the PDCCH monitoring timing. That is, if The terminal device determines frame n f Time slot There are PDCCH monitoring opportunities in is the number of time slots in a frame. Start, in continuous T s time slots to monitor candidate PDCCHs, and then s -T s The candidate PDCCH is not monitored in the time slot. CI The search space set s associated with the CORESET p on the aggregation level is L. The terminal device can determine the candidate PDCCH on the PDCCH monitoring occasion according to the predefined rules. Corresponding CCE index. Indicates that in the community nCIWhen the search space set s is set and the aggregation level is L, the index of the candidate PDCCH at the PDCCH monitoring opportunity.

[0085] Type0-PDCCH monitoring timing

[0086] Type0-PDCCH is used to schedule SIB1 messages. For SSB and CORESET0 multiplexing mode 1, the terminal device monitors the PDCCH in the Type0-PDCCH common search space (CSS) set in two time slots. Specifically, for SSB#i, the terminal device determines the time slot And the frame SFN where time slot n0 is located C Satisfy: If SFN C mod2=0; if SFN C mod2=1,where is the number of time slots in a frame, μ is determined by the subcarrier spacing (SCS) of the PDCCH in CORESET0, M is used to control the degree of overlap of the Type0-PDCCH listening windows associated with SSB#i and SSB#i+1, and candidate values ​​include {1 / 2 (complete overlap), 1 (partial overlap), 2 (complete non-overlap)}, and O is used to control the starting position of the Type0-PDCCH listening window associated with SSB#i, and candidate values ​​include {0, 2, 5, 7}.

[0087] For μ∈{0,1,2,3}, the two time slots where the Type0-PDCCH monitoring opportunities associated with SSB#i are located are n0 and n0+1, and the first symbol index of CORESET (i.e., Type0-PDCCH monitoring opportunity) in M, O and time slot n0 / n0+1 is indicated by the information bit carried by the Physical Broadcast Channel (PBCH) from the candidate value set.

[0088] Reception of other system information (OSI), paging messages, and paging early indication (PEI)

[0089] For the reception of OSI, paging messages, and PEI, the PDCCH monitoring occasions in the corresponding search space set are associated with the actual transmitted SSBs. Taking the reception of paging messages as an example, the terminal device monitors a paging occasion (PO) in each DRX cycle to receive the paging message, where a PO is a set of PDCCH monitoring occasions.

[0090] If the search space set index s = 0, the PDCCH monitoring occasions used for paging are the same as the PDCCH monitoring occasions used for SIB1. If the search space set index s is configured with a non-zero value, the PO is a set of S*X consecutive PDCCH monitoring occasions, where S is the number of SSBs actually transmitted and X is the number of PDCCH monitoring occasions associated with each SSB. The (x*S+K)th PDCCH monitoring occasion used for paging in the PO corresponds to the Kth transmitted SSB, where x = 0, 1, ..., X-1 and K = 1, 2, ..., S.

[0091] The process of receiving OSI and PEI is similar to the process of receiving paging messages, and will not be repeated here.

[0092] The above technical solution does not support repeated PDCCH transmission. Considering the limited satellite transmission power in the NTN system, which leads to limited downlink coverage, terminal devices may not be able to detect the PDCCH, affecting the data transmission process in the NTN system. Therefore, how to improve PDCCH coverage performance is an urgent problem to be solved.

[0093] To facilitate understanding of the technical solutions of the embodiments of the present application, the technical solutions of the present application are described in detail below through specific embodiments. The above related technologies can be combined arbitrarily with the technical solutions of the embodiments of the present application as optional solutions, and all of them fall within the scope of protection of the embodiments of the present application. The embodiments of the present application include at least part of the following contents.

[0094] An embodiment of the present application provides a channel transmission method, which is applied to a terminal device, as shown in FIG6 , including:

[0095] S601. A terminal device receives a repeated transmission of a first physical downlink control channel (PDCCH), where the repeated transmission of the first PDCCH corresponds to a plurality of candidate PDCCHs.

[0096] An embodiment of the present application provides a channel transmission method, which is applied to a network device, as shown in FIG7 , including:

[0097] S701. A network device sends a first PDCCH repetition transmission to a terminal device, where the first PDCCH repetition transmission corresponds to multiple candidate PDCCHs.

[0098] Below, the channel transmission method provided in FIG. 6 or FIG. 7 of the embodiment of the present application is described.

[0099] The network device uses multiple candidate PDCCHs to send repeated transmissions of the first PDCCH, and the terminal device receives repeated transmissions of the first PDCCH sent by the network device on the multiple candidate PDCCHs being monitored. That is, the network device sends repeated transmissions of the first PDCCH on the multiple candidate PDCCHs, and the terminal device receives repeated transmissions of the first PDCCH on the multiple candidate PDCCHs being monitored.

[0100] The repeated transmission of the first PDCCH corresponds to multiple candidate PDCCHs, which can be understood as the multiple candidate PDCCHs are used for the repeated transmission of the first PDCCH.

[0101] It can be understood that the repeated transmission of the first PDCCH can be understood as repeated transmission of the first PDCCH or the first PDCCH that is repeatedly transmitted. The first PDCCH is any repeatedly transmitted PDCCH.

[0102] It is understandable that the PDCCH monitoring opportunity where the candidate PDCCH for repeated transmission of the first PDCCH is located is called the first PDCCH monitoring opportunity, and the first PDCCH monitoring opportunity can also be described as the PDCCH monitoring opportunity for repeated transmission of the first PDCCH. Among them, there are one or more candidate PDCCHs on a PDCCH monitoring opportunity, and at least one candidate PDCCH among the one or more candidate PDCCHs on the first PDCCH monitoring opportunity is used for repeated transmission of the first PDCCH.

[0103] In one example, there are 16 candidate PDCCHs on a PDCCH monitoring occasion, and the terminal device monitors on the PDCCH monitoring occasion, which can be understood as monitoring the 16 candidate PDCCHs on the PDCCH monitoring occasion, and receiving the first PDCCH on one of the 16 monitored candidate PDCCHs.

[0104] In one example, there are 16 candidate PDCCHs on a PDCCH monitoring opportunity, and the terminal device monitors on the PDCCH monitoring opportunity, which can be understood as monitoring the 16 candidate PDCCHs on the PDCCH monitoring opportunity, and receiving the first PDCCH on two candidate PDCCHs among the 16 monitored candidate PDCCHs.

[0105] It is understandable that the network device sends the first PDCCH repetitive transmission to the terminal device at multiple first PDCCH monitoring opportunities, and the terminal device receives the first PDCCH repetitive transmission at multiple first PDCCH monitoring opportunities.

[0106] In an embodiment of the present application, a terminal device receives a first PDCCH that is repeatedly transmitted through multiple candidate PDCCHs, thereby achieving repeated transmission of the first PDCCH and improving the reliability of PDCCH transmission.

[0107] In some embodiments, the multiple candidate PDCCHs are located in multiple first PDCCH monitoring occasions of the same search space set.

[0108] The multiple first PDCCH monitoring occasions where the multiple candidate PDCCHs used for repeated first PDCCH transmission are located are located in the same search space set, that is, repeated PDCCH transmission is performed in the time domain.

[0109] In some embodiments, the plurality of first PDCCH monitoring opportunities are located in one or more time slot groups, where the time slot group includes one or more time slots, and the time slot group contains one or more first PDCCH monitoring opportunities.

[0110] The multiple first PDCCH monitoring opportunities where the multiple candidate PDCCHs for repeated first PDCCH transmission are located are located in one or more time slot groups. A time slot group consists of one or more time slots. A time slot group includes one or more first PDCCH monitoring opportunities.

[0111] It can be understood that the PDCCH repetition transmission in the embodiment of the present application is performed on a time slot basis.

[0112] In some embodiments, the number of time slot groups required for the first PDCCH repetition transmission is determined according to the number of PDCCH repetition transmissions and the number of PDCCH monitoring opportunities in the time slot group. rep =4 and the number of PDCCH monitoring opportunities in the time slot group The terminal device determines the number of time slot groups used for repeated PDCCH transmission

[0113] In some embodiments, the number of time slots included in the first time slot group is greater than the number of PDCCH monitoring opportunities included in the first time slot group, and the first time slot group is one of the one or more time slot groups; or

[0114] The number of time slots included in the first time slot group is equal to the number of PDCCH monitoring opportunities included in the first time slot group;

[0115] The number of time slots included in the first time slot group is smaller than the number of PDCCH monitoring opportunities included in the first time slot group.

[0116] For a first time slot group in one or more time slot groups, the number of time slots included in the first time slot group is Can be greater than, equal to, or less than the number of PDCCH monitoring opportunities in the first time slot group The first time slot group is any time slot group among the one or more time slot groups.

[0117] In one example, Can be greater than For example, as shown in FIG8 , each time slot group contains time slots, and only the first two time slots in the time slot group have one first PDCCH monitoring opportunity each, that is, the number of first PDCCH monitoring opportunities in the time slot group is at this time

[0118] In one example, Can be equal to For example, each time slot in the time slot group has one first PDCCH monitoring opportunity.

[0119] In one example, Can be less than For example, there are two first PDCCH monitoring opportunities in each time slot in the time slot group.

[0120] In the embodiment of this application, for and There is no specific restriction on the size relationship.

[0121] In some embodiments, if the multiple first PDCCH monitoring opportunities are located in multiple time slot groups, the first time slots in different time slot groups are the same, and the first time slot is the time slot in the time slot group where the first PDCCH monitoring opportunity is located.

[0122] The time slot used for the first PDCCH monitoring in the time slot group is the first time slot, that is, the first time slot is the time slot where the first PDCCH monitoring opportunity is located in the time slot group.

[0123] The time slot index of the first time slot used for PDCCH monitoring in each time slot group is the same. For example, as shown in Figure 8, time slot #0 in time slot group #0 has monitoring opportunity #0 in time slot group #0, time slot #1 in time slot group #0 has monitoring opportunity #1 of time slot group #0, time slot #0 in time slot group #1 has monitoring opportunity #0 in time slot group #1, and time slot #1 in time slot group #1 has monitoring opportunity #1 of time slot group #1, that is, the first time slot and the second time slot of slot group #0 and time slot group #1 have the first PDCCH monitoring opportunity, then the terminal device monitors the first PDCCH in each time slot group using the same PDCCH monitoring pattern.

[0124] In some embodiments, the indices of symbols corresponding to the first PDCCH monitoring opportunities in different first time slots are the same, and the first time slot is the time slot where the first PDCCH monitoring opportunity is located in the time slot group.

[0125] The first PDCCH monitoring opportunities in different first time slots correspond to the same symbol in the corresponding first time slot.

[0126] In one example, in Figure 9, taking time slot #0 and time slot #1 in Figure 8 as an example, in these two time slots used for PDCCH monitoring, the symbols corresponding to the first PDCCH monitoring opportunity (or CORESET) are both symbol #0 to symbol #2, wherein the symbols corresponding to monitoring opportunity #0 in time slot #0 are symbol #0 to symbol #2, and the symbols corresponding to monitoring opportunity #1 in time slot #1 are symbol #0 to symbol #2.

[0127] It can be understood that, when the first PDCCH monitoring opportunities on different first time slots correspond to the same symbol in the corresponding first time slot, the time slot indexes of the multiple first time slots in the time slot group are the same or different.

[0128] It can be understood that, when the index of the first time slot used for PDCCH monitoring in each time slot group is the same, the first PDCCH monitoring opportunities on different first time slots correspond to the same or different symbols in the corresponding first time slots.

[0129] In some embodiments, the time domain positions of the one or more first PDCCH monitoring opportunities are determined based on one or more of the following first information:

[0130] The number of time slots contained in the time slot group;

[0131] An index of a first time slot in a time slot group, where the first time slot is a time slot in the time slot group where the first PDCCH monitoring opportunity occurs;

[0132] The first PDCCH monitoring opportunity corresponds to a symbol in the first time slot.

[0133] The terminal device or network device determines the time domain position of the first PDCCH monitoring opportunity based on one or more of the following first information: the number of time slots included in the time slot group, the index of the first time slot in the time slot group, and the symbol corresponding to the first PDCCH monitoring opportunity in the time slot.

[0134] In one example, a terminal device first determines a time domain position corresponding to a first PDCCH monitoring opportunity based on search space set configuration information. Then, starting from one of the first PDCCH monitoring opportunities, the terminal device determines one or more time slot groups for repeated transmission of the first PDCCH based on the number of time slots included in the time slot group and the number of time slot groups required for repeated transmission of the first PDCCH. The time domain position of the first PDCCH monitoring opportunity within the time slot group is determined based on the time slot index used for the first PDCCH monitoring within the time slot group and the symbol index corresponding to the first PDCCH monitoring opportunity within the time slot.

[0135] In some embodiments, the first information is determined according to predefined rules and / or search space set configuration information.

[0136] The terminal device or network device determines at least one of the following according to predefined rules and / or search space set configuration information: the number of time slots included in the time slot group, the time slot index used for PDCCH monitoring in the time slot group, and the symbol corresponding to the first PDCCH monitoring opportunity in the time slot.

[0137] In an example, the predefined rule is a rule for determining a Type 0-PDCCH monitoring opportunity.

[0138] Taking the predefined rule as the determination rule of Type0-PDCCH monitoring opportunity as an example, the terminal device or network device can determine the time slot group corresponding to the repeated transmission of Type0-PDCCH and the time slot index for PDCCH monitoring in the time slot group. In an example, as shown in Figure 10, taking M=1 / 2 and O=0 as an example, in order to avoid collision of Type0-PDCCH monitoring opportunities associated with different SSBs during repeated transmission of PDCCH, the terminal device determines the number of time slots included in the time slot group for repeated transmission of PDCCH. The number of is greater than 3, that is, the slot group includes time slots. For example, for each time slot group including time slot group #0, time slot group #1, time slot group #2, and time slot group #3, the first time slot (time slot #0) and the second time slot (time slot #1) have PDCCH monitoring opportunities (monitoring windows) associated with SSB#0 and SSB#1, and the second and third time slots (time slot #2) have PDCCH monitoring opportunities associated with SSB#2 and SSB#3. In addition, when the terminal device determines the time slot for PDCCH monitoring within the time slot group, it also needs to avoid collisions between PDCCH monitoring opportunities associated with different SSBs.

[0139] When M and O are configured to other values, the terminal device or network device also needs to ensure that the Type0-PDCCH monitoring timings associated with different SSBs do not collide when determining the number of time slots included in the time slot group and the time slots used for PDCCH monitoring in the time slot group.

[0140] The terminal device or network device can determine the time slot group and the symbol corresponding to the first PDCCH monitoring opportunity in the time slot group according to the search space set configuration information. In one example, as shown in Figure 11, for the search space set s, the terminal device determines that there is a PDCCH monitoring opportunity 0 in time slot #0, and corresponds to symbol #0 to symbol #2. Then, for PDCCH repeated transmission, the terminal device determines that the time slot group for PDCCH repeated transmission includes time slots, and the PDCCH monitoring opportunities in the time slot group all correspond to symbol #0 to symbol #2. At this time, time slot group #1 includes 1 time slot: time slot #1, and symbols #0 to symbol #2 in time slot #1 correspond to the PDCCH monitoring opportunities in time slot group #1.

[0141] In some embodiments, the search space set configuration information includes but is not limited to one or more of the following information:

[0142] Search space associated CORESET;

[0143] PDCCH monitoring period;

[0144] PDCCH monitoring offset;

[0145] PDCCH monitoring pattern within the time slot;

[0146] the number of time slots that last;

[0147] Number of PDCCH monitoring opportunities in a time slot;

[0148] The number of candidate PDCCHs corresponding to aggregation levels L=1, 2, 4, 8, and 16 respectively.

[0149] In an embodiment of the present application, a terminal device or a network device may determine the symbol corresponding to the Type0-PDCCH monitoring opportunity within the time slot group based on the symbol index corresponding to CORESET0 in time slot n0 / n0+1 configured by the higher layer, where the higher layer configuration is provided by the search space set configuration information. For example, the symbol index corresponding to the Type0-PDCCH monitoring opportunity within the time slot group is the same as the symbol index corresponding to CORESET in time slot n0 / n0+1 configured by the higher layer.

[0150] In some embodiments, the plurality of first PDCCH monitoring opportunities are located in one or more symbol groups, where the symbol group includes one or more symbols, and the symbol group includes one or more first PDCCH monitoring opportunities.

[0151] The multiple first PDCCH monitoring opportunities where the multiple candidate PDCCHs for repeated first PDCCH transmission are located are located in one or more symbol groups. A symbol group consists of one or more symbols, and a symbol group includes one or more first PDCCH monitoring opportunities.

[0152] It can be understood that the PDCCH repetition transmission in the embodiment of the present application is performed on a symbol basis.

[0153] In some embodiments, the number of symbol groups required for the first PDCCH repetition transmission is determined according to the number of first PDCCH repetition transmissions and the number of PDCCH monitoring opportunities in the symbol group. rep =4 and the number of PDCCH monitoring opportunities in the symbol group is The terminal device determines the number of time slot groups used for repeated PDCCH transmission

[0154] In some embodiments, the number of symbols included in the first symbol group is greater than or equal to the number of symbols occupied by the first PDCCH monitoring opportunity.

[0155] In the embodiment of the present application, the number of symbols contained in the symbol group is Need to be greater than or equal to the number of symbols occupied by CORESET on the first PDCCH monitoring opportunity In one example, as shown in FIG12 , the number of CORESET symbols on the PDCCH monitoring occasion is Then the number of symbols in the symbol group needs to satisfy For example,

[0156] In some embodiments, if the multiple first PDCCH monitoring opportunities are located in multiple symbol groups, the indices of symbols corresponding to the first PDCCH monitoring opportunities in different symbol groups are the same.

[0157] In one example, as shown in Figure 12, in symbol group #0 and symbol group #1, the symbols corresponding to the PDCCH monitoring opportunities are symbols #0 to #2. Symbols #7 to #13 in Figure 12 are symbols #0 to #6 in symbol group #1.

[0158] It should be noted that, if the multiple first PDCCH monitoring opportunities are located in multiple symbol groups, the indexes of symbols corresponding to the first PDCCH monitoring opportunities in different symbol groups may be different.

[0159] In some embodiments, the time domain positions of the one or more first PDCCH monitoring opportunities are determined based on one or more of the following second information:

[0160] The number of symbols contained in the symbol group;

[0161] The index of the first symbol in the symbol group, where the first symbol is the symbol where the first PDCCH monitoring opportunity is located in the symbol group.

[0162] The terminal device or network device determines the time domain position of the first PDCCH monitoring opportunity for repeated transmission of the first PDCCH based on one or more of the following second information: the number of symbols contained in the symbol group, and the symbol index used for PDCCH monitoring in the symbol group.

[0163] In one example, the terminal device first determines the time domain position corresponding to the first PDCCH monitoring opportunity based on the search space set configuration information, and then, starting from one of the first PDCCH monitoring opportunities, determines one or more symbol groups based on the number of symbols included in the symbol group and the number of symbol groups required for repeated transmission of the first PDCCH, to perform repeated transmission of the first PDCCH. The time domain position corresponding to the first PDCCH monitoring opportunity within the symbol group is determined based on the symbol index used for PDCCH monitoring within the symbol group.

[0164] In some embodiments, the second information is determined according to predefined rules and / or search space set configuration information.

[0165] The terminal device determines at least one of the following according to predefined rules and / or search space set configuration information: the number of symbols included in the symbol group, and the index of the first symbol used for PDCCH monitoring in the symbol group.

[0166] In an example, the predefined rule is a rule for determining a Type 0-PDCCH monitoring opportunity.

[0167] Taking the predefined rule for determining the Type0-PDCCH monitoring timing as an example, the terminal device or network device can determine the symbol group corresponding to the Type0-PDCCH repeated transmission and the symbol index for PDCCH monitoring in the symbol group.

[0168] In one example, as shown in FIG13 , when M=1 / 2, O=0, the number of CORESET0 symbols is When PDCCH is repeatedly transmitted, the PDCCH monitoring opportunity associated with SSB#0 corresponds to symbol#0-symbol#2, and the PDCCH monitoring opportunity associated with SSB#1 corresponds to symbol#3-symbol#5. In order to avoid collision of Type0-PDCCH monitoring opportunities associated with different SSBs during PDCCH repeated transmission, the terminal device determines that the symbol group for PDCCH repeated transmission contains symbols. Further, For example, as shown in Figure 13, for a symbol group including 6 symbols, the terminal device determines that symbols #0 to #2 in the symbol group correspond to the PDCCH monitoring timing associated with SSB#0, and symbols #3 to #5 in the symbol group correspond to the PDCCH monitoring timing associated with SSB#1, thereby avoiding collision of PDCCH monitoring timings associated with different SSBs.

[0169] The terminal device or the network device may determine the symbol group and the symbol index within the symbol group for PDCCH monitoring according to the search space set configuration information.

[0170] In one example, as shown in FIG14 , for the search space set s, the terminal device determines that the PDCCH monitoring opportunity in time slot #0 corresponds to symbol #0 to symbol #2. Then, for PDCCH repeated transmission, the terminal device determines that the symbol group for PDCCH repeated transmission includes symbols, and the PDCCH monitoring opportunities in the symbol group all correspond to symbols #0-#2.

[0171] In some embodiments, the multiple first PDCCH monitoring opportunities are consecutive PDCCH monitoring opportunities in the first search space set; or, the multiple first PDCCH monitoring opportunities are consecutive PDCCH monitoring opportunities associated with the same synchronization signal block SSB in the first search space set.

[0172] It can be understood that the PDCCH retransmission in the embodiment of the present application is performed according to the monitoring occasion (MO).

[0173] Taking the multiple first PDCCH monitoring opportunities corresponding to consecutive PDCCH monitoring opportunities in the same search space set as an example, as shown in FIG15 , for the search space set s, if the PDCCH monitoring period k is configured s =320, offset o s =0, continuous time slot number T s =2, the PDCCH monitoring pattern in the time slot is '10000001000000' and When the PDCCH monitoring time in time slot #0 and time slot #1 corresponds to symbol #0 to symbol #2 and symbol #7 to symbol #9, the terminal device determines that the PDCCH monitoring time in time slot #0 and time slot #1 corresponds to symbol #0 to symbol #2 and symbol #7 to symbol #9. rep =4, the terminal device determines PDCCH monitoring opportunity #0 to PDCCH monitoring opportunity #3 for repeated PDCCH transmission.

[0174] Taking the multiple first PDCCH monitoring opportunities corresponding to the continuous PDCCH monitoring opportunities associated with the same SSB in the same search space set as an example, for the reception of OSI, paging message and PEI, if the repeated transmission of the first PDCCH is supported, in one possible implementation, the terminal device monitors the second monitoring opportunity to receive the first message, the first message includes at least one of the following: OSI, paging message and PEI, and the second monitoring opportunity is a group of S*X*N rep consecutive PDCCH monitoring opportunities. The (n*X*S+x*S+K)th or (x*N rep*S+n*S+K) PDCCH monitoring opportunities correspond to the Kth transmitted SSB, where N rep The number of PDCCH retransmissions, n = 0, 1, ... N rep -1.

[0175] Taking the multiple first PDCCH monitoring opportunities corresponding to the consecutive PDCCH monitoring opportunities associated with the same SSB in the same search space set as an example, for paging message reception, when the high-level configuration X=1, S=4, N rep =2, the terminal device determines that in PO, the n*S+Kth monitoring opportunity corresponds to the Kth SSB, among which the 1st monitoring opportunity or the 5th monitoring opportunity (MO) corresponds to SSB#0, the 2nd monitoring opportunity or the 6th monitoring opportunity (MO) corresponds to SSB#1, the 3rd monitoring opportunity or the 7th monitoring opportunity (MO) corresponds to SSB#2, and the 4th monitoring opportunity or the 8th monitoring opportunity (MO) corresponds to SSB#3.

[0176] In the PDCCH repeated transmission scheme provided in the embodiment of the present application, the PDCCH monitoring opportunities for repeated PDCCH transmission are located in the same search space set, thereby performing repeated PDCCH transmission in the time domain and improving PDCCH transmission reliability.

[0177] In some embodiments, the plurality of candidate PDCCHs are located at a plurality of first PDCCH monitoring occasions on a plurality of search space sets.

[0178] In an embodiment of the present application, multiple candidate PDCCHs are located at multiple first PDCCH monitoring opportunities on at least two search space sets. In one example, multiple candidate PDCCHs are located at multiple first PDCCH monitoring opportunities on two search space sets. In one example, multiple candidate PDCCHs are located at multiple first PDCCH monitoring opportunities on three or more search space sets.

[0179] It can be understood that the multiple first PDCCH monitoring opportunities where the multiple candidate PDCCHs for the first PDCCH repeated transmission are located are located in different search space sets, the PDCCH monitoring opportunities of different search space sets may be located at different time domain positions, and / or the CORESETs associated with different search space sets may be located at different frequency domain positions. In the case that multiple candidate PDCCHs are located at multiple candidate PDCCHs from different search space sets, PDCCH repeated transmission is performed in the time domain and / or frequency domain.

[0180] In some embodiments, for different search space sets in the plurality of search space sets, one or more of the following parameters are configured as the same value:

[0181] PDCCH monitoring period;

[0182] PDCCH monitoring offset;

[0183] the number of time slots that last;

[0184] Number of PDCCH monitoring opportunities in a timeslot.

[0185] In some embodiments, the first PDCCH monitoring occasions in different search space sets have the same index.

[0186] At this time, the terminal device monitors the multiple candidate PDCCHs at the PDCCH monitoring timing with the same index in different search space sets to receive the first PDCCH repeated transmission, and / or the network device performs the first PDCCH repeated transmission at the PDCCH monitoring timing with the same index in different search space sets.

[0187] In one example, for the first PDCCH, the number of repetition transmissions N is rep =2, the candidate PDDCH for the first PDCCH repeated transmission is located in 2 search space sets S i and S j PDCCH monitoring opportunity, if for the search space set S i and S j , configure the PDCCH monitoring period offset Continuous time slots When the PDCCH monitoring patterns in the time slot are '10000000000000' and '00000001000000' respectively, as shown in FIG16 , the terminal device has a search space set S i and S j Monitor candidate PDCCHs for PDCCH repetition transmission at monitoring opportunity #0, and in the search space set S i and S j Monitor candidate PDCCHs for PDCCH repetition transmission at monitoring opportunity #1.

[0188] It is understandable that the indexes of the first PDCCH monitoring occasions in different search space sets may be different.

[0189] In some embodiments, the number of repetition transmissions of the first PDCCH is determined by one or more of the following:

[0190] Control resource set CORESET configuration information or search space set configuration information;

[0191] The third information in the physical broadcast channel PBCH.

[0192] The number of times the first PDCCH is repeatedly transmitted may also be described as the number of first PDCCH repetition transmissions.

[0193] The third information may be a reserved bit in the PBCH.

[0194] Taking the case where the number of repeated transmissions of the first PDCCH is determined by CORESET configuration information or search space set configuration information as an example, the number of repeated transmissions of the first PDCCH is provided in the CORESET configuration information or the search space set configuration information.

[0195] In one example, the number of PDCCH repetition transmissions is provided in the configuration information of CORESET0, and the terminal device determines the corresponding number of PDCCH repetition transmissions when receiving the CORESET0 configuration information.

[0196] In one example, the number of PDCCH repetition transmissions is provided in the search space set configuration information, and the terminal device determines the corresponding number of PDCCH repetition transmissions when receiving the search space set configuration information.

[0197] Taking the example where the number of repeated transmissions of the first PDCCH is determined by the third information in the PBCH, the number of repeated transmissions of the first PDCCH is provided in the third information in the PBCH.

[0198] In one example, the information bits in the current PBCH are For reserved bits, the bit field values ​​'00', '01', and '10' can be used to indicate the number of PDCCH repetition transmissions: 1, 2, and 4, respectively.

[0199] In some embodiments, the third information is used to indicate whether to apply the number of repeated transmissions of the first PDCCH indicated by the CORESET configuration information or the search space set configuration information.

[0200] Taking the example where the number of repeated transmissions of the first PDCCH is determined by the CORESET configuration information or the search space set configuration information and the third information in the PBCH, the third information in the PBCH is used to indicate whether the number of repeated transmissions of the first PDCCH indicated by the CORESET configuration information or the search space set configuration information is applied.

[0201] It can be understood that the third information indicates whether to apply the first PDCCH repetition transmission times indicated by the CORESET configuration information or the search space set configuration information based on different values.

[0202] In one example, the information bits of the current PBCH This is a reserved bit used to indicate whether to apply the PDCCH retransmission times in the CORESET0 configuration information. For example, When the number of PDCCH retransmissions in the CORESET0 configuration information is not applied, When the number of PDCCH retransmissions in the CORESET0 configuration information is applied, it indicates the number of PDCCH retransmissions in the CORESET0 configuration information.

[0203] In some embodiments, the number of repetition transmissions of the first PDCCH is associated with the index of the candidate PDCCH or the index of the starting control channel element CCE corresponding to the candidate PDCCH.

[0204] Optionally, the number of repeated transmissions of the first PDCCH is determined from candidate values ​​of the number of repeated transmissions based on an index of the candidate PDCCH or an index of a starting control channel element CCE corresponding to the candidate PDCCH.

[0205] In one example, the candidate values ​​of the number of PDCCH repetition transmissions include N rep ={2,4}, then the candidate PDCCH index satisfy When N rep =2, satisfy When N rep =4. For another example, the CCE index ncce,0 corresponding to the candidate PDCCH index satisfies (n cce,0 / L)mod2=0, corresponding to N rep =2, the index of the CCE corresponding to the candidate PDCCH index ncce,0 satisfies (n cce,0 / L)mod2=1, corresponding to N rep =4.

[0206] In some embodiments, the candidate PDCCH indexes of the multiple candidate PDCCHs at corresponding first PDCCH monitoring occasions are the same.

[0207] For repeated transmission of the first PDCCH, it can be transmitted through candidate PDCCHs with the same index at different first PDCCH monitoring opportunities. In this case, the network device can send the first PDCCH on candidate PDCCHs with the same index, and the terminal device can monitor the repeated transmission of the first PDCCH on candidate PDCCHs with the same index at different first PDCCH monitoring opportunities, thereby simplifying the repeated transmission scheme of the first PDCCH, reducing the complexity of PDCCH detection, and improving system transmission efficiency.

[0208] It can be understood that the multiple candidate PDCCHs correspond to the same candidate PDCCH index in multiple PDCCH monitoring occasions of the same search space set or PDCCH monitoring occasions of different search space sets.

[0209] In one example, for the number of PDCCH repetition transmissions N rep =2, if the two candidate PDCCHs for repeated PDCCH transmission are located in the two PDCCH monitoring opportunities of the same search space set, then the two candidate PDCCH indices same.

[0210] In one example, if two candidate PDCCHs for repeated PDCCH transmission are located in different search space sets S i and S j The PDCCH monitoring opportunity, then the two candidate PDCCH indexes

[0211] In the embodiment of the present application, the candidate PDCCH indexes of multiple candidate PDCCHs at the corresponding first PDCCH monitoring occasions are the same, which can reduce the detection complexity caused by repeated PDCCH transmission.

[0212] In some embodiments, the monitoring timing for repeated transmission of the first PDCCH is a union of the first PDCCH monitoring timings of each candidate PDCCH in the multiple candidate PDCCHs.

[0213] When multiple candidate PDCCHs are used for repeated transmission of the first PDCCH, the monitoring timing for repeated transmission of the first PDCCH is the union of the first PDCCH monitoring timings where each candidate PDCCH in the multiple candidate PDCCHs is located.

[0214] It is understandable that if the first PDCCH retransmission received by the terminal device includes multiple candidate PDCCHs, the monitoring timing of the first PDCCH retransmission is the union of the PDCCH monitoring timings where the multiple candidate PDCCHs are located.

[0215] It can be understood that the starting position of the first PDCCH repetition transmission is the starting position of the first candidate PDCCH, and the ending position of the first PDCCH repetition transmission is the ending position of the last candidate PDCCH.

[0216] In some embodiments, when the first PDCCH schedules a physical downlink shared channel (PDSCH) or a physical uplink shared channel (PUSCH), the time domain position of the PDSCH or PUSCH scheduled by the first PDCCH is determined based on the time domain position of one candidate PDCCH among multiple candidate PDCCHs used for repeated transmission of the first PDCCH.

[0217] In some embodiments, the time domain position of the physical downlink shared channel PDSCH or the physical uplink shared channel PUSCH scheduled by the first PDCCH is determined based on the time domain position of the first candidate PDCCH or the last candidate PDCCH among multiple candidate PDCCHs.

[0218] In an embodiment of the present application, the first PDCCH repeated transmission received by the terminal device includes multiple candidate PDCCHs, and the time domain position of the PDSCH / PUSCH scheduled by the first PDCCH is determined according to the time domain position of the first candidate PDCCH or the last candidate PDCCH among the multiple candidate PDCCHs.

[0219] In one example, for the repeated transmission of the first PDCCH based on the monitoring timing of one search space set or multiple search space sets, the time domain position of the PDSCH / PUSCH scheduled by the first PDCCH can be determined according to the time domain position of the last candidate PDCCH, thereby ensuring that the terminal device sends and receives data at the correct time domain position.

[0220] In one example, for repeated PDCCH transmission based on a monitoring opportunity of one search space set or multiple search space sets, the time domain position of the PDSCH / PUSCH scheduled by the first PDCCH can be determined according to the time domain position of the first candidate PDCCH, so that a terminal device that can only receive the first candidate PDCCH can also send and receive data at the correct time domain position.

[0221] The channel transmission method of the embodiment of the present application provides a design scheme for repeated transmission of a PDCCH in the time domain. A terminal device performs repeated transmission of the PDCCH by monitoring multiple candidate PDCCHs, wherein:

[0222] Solution 1), the multiple candidate PDCCHs are located in multiple PDCCH monitoring opportunities of the same search space set;

[0223] Solution 2) The multiple candidate PDCCHs are located in PDCCH monitoring opportunities of different search space sets.

[0224] For solution 1),

[0225] a) The multiple PDCCH monitoring opportunities exist in one or more time slot groups; or

[0226] b) the multiple PDCCH monitoring opportunities exist in one or more symbol groups; or

[0227] c) the multiple PDCCH monitoring opportunities correspond to consecutive PDCCH monitoring opportunities in the same search space set or consecutive PDCCH monitoring opportunities associated with the same SSB;

[0228] For a) and b), the terminal device determines the time slot group or symbol group pattern according to predefined rules and / or search space set configuration information. At this time, the terminal device can clearly determine the time domain location of the monitoring opportunity for repeated PDCCH transmission.

[0229] For 2), the terminal device can clearly know the time domain location of the monitoring opportunity of PDCCH repeated transmission;

[0230] In an embodiment of the present application, the terminal device determines the time domain position of the scheduled PDSCH / PUSCH based on the time domain position of the first candidate PDCCH or the last candidate PDCCH, thereby ensuring that the terminal device can send and receive data at the correct time domain position.

[0231] The preferred embodiments of the present application are described in detail above in conjunction with the accompanying drawings. However, the present application is not limited to the specific details in the above embodiments. Within the technical concept of the present application, the technical solution of the present application can be subjected to a variety of simple modifications, and these simple modifications all fall within the scope of protection of the present application. For example, the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present application will no longer describe the various possible combinations separately. For another example, the various different embodiments of the present application can also be arbitrarily combined, as long as they do not violate the idea of ​​the present application, they should also be regarded as the contents disclosed in the present application. For another example, under the premise of no conflict, the various embodiments and / or the technical features in each embodiment described in the present application can be arbitrarily combined with the prior art, and the technical solution obtained after the combination should also fall within the scope of protection of the present application.

[0232] It should also be understood that in the various method embodiments of the present application, the sequence numbers of the above-mentioned processes do not imply a precedence in the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application. In addition, in the embodiments of the present application, the terms "downlink," "uplink," and "sidelink" are used to indicate the transmission direction of signals or data, where "downlink" is used to indicate the first direction of transmission of signals or data from a site to a user equipment in a cell, "uplink" is used to indicate the second direction of transmission of signals or data from a user equipment in a cell to a site, and "sidelink" is used to indicate the third direction of transmission of signals or data from user equipment 1 to user equipment 2. For example, "downlink signal" indicates that the transmission direction of the signal is the first direction. In addition, in the embodiments of the present application, the term "and / or" is merely a description of the association relationship between associated objects, indicating that three relationships can exist. Specifically, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0233] FIG17 is a first schematic diagram of the structure of a terminal device provided in an embodiment of the present application. As shown in FIG17 , the terminal device 1700 includes:

[0234] The first communication unit 1701 is configured to receive a first physical downlink control channel PDCCH repetitive transmission, where the first PDCCH repetitive transmission corresponds to a plurality of candidate PDCCHs.

[0235] In some embodiments, the multiple candidate PDCCHs are located in multiple first PDCCH monitoring occasions of the same search space set.

[0236] In some embodiments, the plurality of first PDCCH monitoring opportunities are located in one or more time slot groups, where the time slot group includes one or more time slots, and the time slot group contains one or more first PDCCH monitoring opportunities.

[0237] In some embodiments, the number of time slots included in the first time slot group is greater than the number of first PDCCH monitoring opportunities included in the first time slot group, and the first time slot group is one of the one or more time slot groups; or

[0238] The number of time slots included in the first time slot group is equal to the number of first PDCCH monitoring opportunities included in the first time slot group;

[0239] The number of time slots included in the first time slot group is smaller than the number of first PDCCH monitoring opportunities included in the first time slot group.

[0240] In some embodiments, if the multiple first PDCCH monitoring opportunities are located in multiple time slot groups, the first time slots in different time slot groups are the same, and the first time slot is the time slot in the time slot group where the first PDCCH monitoring opportunity is located.

[0241] In some embodiments, the indices of symbols corresponding to the first PDCCH monitoring opportunities in different first time slots are the same, and the first time slot is the time slot where the first PDCCH monitoring opportunity is located in the time slot group.

[0242] In some embodiments, the time domain positions of the one or more first PDCCH monitoring opportunities are determined based on one or more of the following first information:

[0243] The number of time slots contained in the time slot group;

[0244] An index of a first time slot in a time slot group, where the first time slot is a time slot in the time slot group where the first PDCCH monitoring opportunity occurs;

[0245] The first PDCCH monitoring opportunity corresponds to a symbol in the first time slot.

[0246] In some embodiments, the first information is determined according to predefined rules and / or search space set configuration information.

[0247] In some embodiments, the plurality of first PDCCH monitoring opportunities are located in one or more symbol groups, where the symbol group includes one or more symbols, and the symbol group includes one or more first PDCCH monitoring opportunities.

[0248] In some embodiments, the number of symbols included in the first symbol group is greater than or equal to the number of symbols occupied by the first PDCCH monitoring opportunity.

[0249] In some embodiments, if the multiple first PDCCH monitoring opportunities are located in multiple symbol groups, the indices of symbols corresponding to the first PDCCH monitoring opportunities in different symbol groups are the same.

[0250] In some embodiments, the time domain positions of the one or more first PDCCH monitoring opportunities are determined based on one or more of the following second information:

[0251] The number of symbols contained in the symbol group;

[0252] The index of the first symbol in the symbol group, where the first symbol is the symbol where the first PDCCH monitoring opportunity is located in the symbol group.

[0253] In some embodiments, the second information is determined according to predefined rules and / or search space set configuration information.

[0254] In some embodiments, the multiple first PDCCH monitoring opportunities are consecutive PDCCH monitoring opportunities in the first search space set; or,

[0255] The multiple first PDCCH monitoring opportunities are consecutive PDCCH monitoring opportunities associated with the same synchronization signal block SSB in the first search space set.

[0256] In some embodiments, the plurality of candidate PDCCHs are located at a plurality of first PDCCH monitoring occasions on a plurality of search space sets.

[0257] In some embodiments, for different search space sets in the plurality of search space sets, one or more of the following parameters are configured as the same value:

[0258] PDCCH monitoring period;

[0259] PDCCH monitoring offset;

[0260] the number of time slots that last;

[0261] Number of PDCCH monitoring opportunities in a timeslot.

[0262] In some embodiments, the number of repetition transmissions of the first PDCCH is determined by one or more of the following:

[0263] Control resource set CORESET configuration information or search space set configuration information;

[0264] The third information in the physical broadcast channel PBCH.

[0265] In some embodiments, the third information is used to indicate whether to apply the number of repeated transmissions of the first PDCCH indicated by the CORESET configuration information or the search space set configuration information.

[0266] In some embodiments, the number of repetition transmissions of the first PDCCH is associated with the index of the candidate PDCCH or the index of the starting control channel element CCE corresponding to the candidate PDCCH.

[0267] In some embodiments, the candidate PDCCH indexes of the multiple candidate PDCCHs at corresponding first PDCCH monitoring occasions are the same.

[0268] In some embodiments, the monitoring timing for repeated transmission of the first PDCCH is a union of the first PDCCH monitoring timings of each candidate PDCCH in the multiple candidate PDCCHs.

[0269] In some embodiments, the time domain position of the physical downlink shared channel PDSCH or the physical uplink shared channel PUSCH scheduled by the first PDCCH is determined based on the time domain position of the first candidate PDCCH or the last candidate PDCCH among the multiple candidate PDCCHs.

[0270] It should be noted that the terminal device may also include a first processing unit to perform processing such as parsing the first PDCCH.

[0271] The first communication unit in the terminal device may be implemented by a transceiver in the terminal device. The first processing unit in the terminal device may be implemented by a processor in the terminal device.

[0272] FIG18 is a first schematic diagram of the structure of a network device provided in an embodiment of the present application. As shown in FIG18 , the network device 1800 includes:

[0273] The second communication unit 1801 is configured to send a first PDCCH repetition transmission to the terminal device, where the first PDCCH repetition transmission corresponds to multiple candidate PDCCHs.

[0274] In some embodiments, the multiple candidate PDCCHs are located in multiple first PDCCH monitoring occasions of the same search space set.

[0275] In some embodiments, the plurality of first PDCCH monitoring opportunities are located in one or more time slot groups, where the time slot group includes one or more time slots, and the time slot group contains one or more first PDCCH monitoring opportunities.

[0276] In some embodiments, the number of time slots included in the first time slot group is greater than the number of first PDCCH monitoring opportunities included in the first time slot group, and the first time slot group is one of the one or more time slot groups; or

[0277] The number of time slots included in the first time slot group is equal to the number of first PDCCH monitoring opportunities included in the first time slot group;

[0278] The number of time slots included in the first time slot group is smaller than the number of first PDCCH monitoring opportunities included in the first time slot group.

[0279] In some embodiments, if the multiple first PDCCH monitoring opportunities are located in multiple time slot groups, the first time slots in different time slot groups are the same, and the first time slot is the time slot in the time slot group where the first PDCCH monitoring opportunity is located.

[0280] In some embodiments, the indices of symbols corresponding to the first PDCCH monitoring opportunities in different first time slots are the same, and the first time slot is the time slot where the first PDCCH monitoring opportunity is located in the time slot group.

[0281] In some embodiments, the time domain positions of the one or more first PDCCH monitoring opportunities are determined based on one or more of the following first information:

[0282] The number of time slots contained in the time slot group;

[0283] An index of a first time slot in a time slot group, where the first time slot is a time slot in the time slot group where the first PDCCH monitoring opportunity occurs;

[0284] The first PDCCH monitoring opportunity corresponds to a symbol in the first time slot.

[0285] In some embodiments, the first information is determined according to predefined rules and / or search space set configuration information.

[0286] In some embodiments, the plurality of first PDCCH monitoring opportunities are located in one or more symbol groups, where the symbol group includes one or more symbols, and the symbol group includes one or more first PDCCH monitoring opportunities.

[0287] In some embodiments, the number of symbols included in the first symbol group is greater than or equal to the number of symbols occupied by the first PDCCH monitoring opportunity.

[0288] In some embodiments, if the multiple first PDCCH monitoring opportunities are located in multiple symbol groups, the indices of symbols corresponding to the first PDCCH monitoring opportunities in different symbol groups are the same.

[0289] In some embodiments, the time domain positions of the one or more first PDCCH monitoring opportunities are determined based on one or more of the following second information:

[0290] The number of symbols contained in the symbol group;

[0291] The index of the first symbol in the symbol group, where the first symbol is the symbol where the first PDCCH monitoring opportunity is located in the symbol group.

[0292] In some embodiments, the second information is determined according to predefined rules and / or search space set configuration information.

[0293] In some embodiments, the multiple first PDCCH monitoring opportunities are consecutive PDCCH monitoring opportunities in the first search space set; or,

[0294] The multiple first PDCCH monitoring opportunities are consecutive PDCCH monitoring opportunities associated with the same synchronization signal block SSB in the first search space set.

[0295] In some embodiments, the plurality of candidate PDCCHs are located at a plurality of first PDCCH monitoring occasions on a plurality of search space sets.

[0296] In some embodiments, for different search space sets in the plurality of search space sets, one or more of the following parameters are configured as the same value:

[0297] PDCCH monitoring period;

[0298] PDCCH monitoring offset;

[0299] the number of time slots that last;

[0300] Number of PDCCH monitoring opportunities in a timeslot.

[0301] In some embodiments, the number of repetition transmissions of the first PDCCH is determined by one or more of the following:

[0302] Control resource set CORESET configuration information or search space set configuration information;

[0303] The third information in the physical broadcast channel PBCH.

[0304] In some embodiments, the third information is used to indicate whether to apply the number of repeated transmissions of the first PDCCH indicated by the CORESET configuration information or the search space set configuration information.

[0305] In some embodiments, the number of repetition transmissions of the first PDCCH is associated with the index of the candidate PDCCH or the index of the starting control channel element CCE corresponding to the candidate PDCCH.

[0306] In some embodiments, the candidate PDCCH indexes of the multiple candidate PDCCHs at corresponding first PDCCH monitoring occasions are the same.

[0307] In some embodiments, the monitoring timing for repeated transmission of the first PDCCH is a union of the first PDCCH monitoring timings of each candidate PDCCH in the multiple candidate PDCCHs.

[0308] In some embodiments, the time domain position of the physical downlink shared channel PDSCH or the physical uplink shared channel PUSCH scheduled by the first PDCCH is determined based on the time domain position of the first candidate PDCCH or the last candidate PDCCH among the multiple candidate PDCCHs.

[0309] It should be noted that the terminal device may also include a second processing unit to perform processing such as generating the first PDCCH.

[0310] The second communication unit in the network device may be implemented by a transceiver in the network device. The first processing unit in the network device may be implemented by a processor in the network device.

[0311] Those skilled in the art should understand that the relevant description of the above-mentioned terminal equipment or network equipment in the embodiments of the present application can be understood by referring to the relevant description of the channel transmission method in the embodiments of the present application.

[0312] Figure 19 is a schematic diagram of a communication device 1900 provided in an embodiment of the present application. The communication device can be a terminal device or a network device. The communication device 1900 shown in Figure 19 includes a processor 1910, which can call and execute a computer program from a memory to implement the method in the embodiment of the present application.

[0313] Optionally, as shown in FIG19 , the communication device 1900 may further include a memory 1920. The processor 1910 may call and execute a computer program from the memory 1920 to implement the method in the embodiment of the present application.

[0314] The memory 1920 may be a separate device independent of the processor 1910 , or may be integrated into the processor 1910 .

[0315] Optionally, as shown in FIG19 , the communication device 1900 may further include a transceiver 1930 , and the processor 1910 may control the transceiver 1930 to communicate with other devices, specifically, to send information or data to other devices, or to receive information or data sent by other devices.

[0316] The transceiver 1930 may include a transmitter and a receiver. The transceiver 1930 may further include an antenna, and the number of antennas may be one or more.

[0317] Optionally, the communication device 1900 may specifically be a network device in an embodiment of the present application, and the communication device 1900 may implement the corresponding processes implemented by the network device in each method in the embodiment of the present application. For the sake of brevity, they will not be repeated here.

[0318] Optionally, the communication device 1900 may specifically be a mobile terminal / terminal device of an embodiment of the present application, and the communication device 1900 may implement the corresponding processes implemented by the mobile terminal / terminal device in each method of the embodiment of the present application. For the sake of brevity, they will not be repeated here.

[0319] Figure 20 is a schematic structural diagram of a chip according to an embodiment of the present application. The chip 2000 shown in Figure 20 includes a processor 2010, which can call and run a computer program from a memory to implement the method according to the embodiment of the present application.

[0320] Optionally, as shown in FIG20 , the chip 2000 may further include a memory 2020. The processor 2010 may call and execute a computer program from the memory 2020 to implement the method in the embodiment of the present application.

[0321] The memory 2020 may be a separate device independent of the processor 2010 , or may be integrated into the processor 2010 .

[0322] Optionally, the chip 2000 may further include an input interface 2030. The processor 2010 may control the input interface 2030 to communicate with other devices or chips, and specifically, may obtain information or data sent by other devices or chips.

[0323] Optionally, the chip 2000 may further include an output interface 2040. The processor 2010 may control the output interface 2040 to communicate with other devices or chips, and specifically, may output information or data to other devices or chips.

[0324] Optionally, the chip can be applied to the network device in the embodiments of the present application, and the chip can implement the corresponding processes implemented by the network device in each method of the embodiments of the present application. For the sake of brevity, they will not be repeated here.

[0325] Optionally, the chip can be applied to the mobile terminal / terminal device in the embodiments of the present application, and the chip can implement the corresponding processes implemented by the mobile terminal / terminal device in the various methods of the embodiments of the present application. For the sake of brevity, they will not be repeated here.

[0326] It should be understood that the chip mentioned in the embodiments of the present application can also be called a system-level chip, a system chip, a chip system or a system-on-chip chip, etc.

[0327] FIG21 is a schematic block diagram of a communication system 2100 provided in an embodiment of the present application. As shown in FIG21 , the communication system 2100 includes a terminal device 2110 and a network device 2120 .

[0328] Among them, the terminal device 2110 can be used to implement the corresponding functions implemented by the terminal device in the above method, and the network device 2120 can be used to implement the corresponding functions implemented by the network device in the above method. For the sake of brevity, they are not repeated here.

[0329] It should be understood that the processor of the embodiments of the present application may be an integrated circuit chip with signal processing capabilities. During implementation, each step of the above method embodiment can be completed by hardware integrated logic circuits in the processor or software instructions. The above processor can be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. The various methods, steps, and logic block diagrams disclosed in the embodiments of the present application can be implemented or executed. The general-purpose processor can be a microprocessor or any conventional processor. The steps of the method disclosed in the embodiments of the present application can be directly embodied as being executed by a hardware decoding processor, or can be executed by a combination of hardware and software modules in the decoding processor. The software module can be located in a storage medium mature in the art, such as random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, etc. The storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.

[0330] It is understood that the memory in the embodiments of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memories. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), which is used as an external cache. By way of example and not limitation, many forms of RAM are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct RAM bus random access memory (DR RAM). It should be noted that the memory of the systems and methods described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0331] It should be understood that the above-mentioned memories are exemplary but not restrictive. For example, the memories in the embodiments of the present application may also be static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct RAM RAM (DR RAM), etc. In other words, the memories in the embodiments of the present application are intended to include, but are not limited to, these and any other suitable types of memories.

[0332] An embodiment of the present application also provides a computer-readable storage medium for storing a computer program.

[0333] Optionally, the computer-readable storage medium can be applied to the network device in the embodiments of the present application, and the computer program enables the computer to execute the corresponding processes implemented by the network device in the various methods of the embodiments of the present application. For the sake of brevity, they are not repeated here.

[0334] Optionally, the computer-readable storage medium can be applied to the mobile terminal / terminal device in the embodiments of the present application, and the computer program enables the computer to execute the corresponding processes implemented by the mobile terminal / terminal device in the various methods of the embodiments of the present application. For the sake of brevity, they will not be repeated here.

[0335] An embodiment of the present application also provides a computer program product, including computer program instructions.

[0336] Optionally, the computer program product can be applied to the network device in the embodiments of the present application, and the computer program instructions enable the computer to execute the corresponding processes implemented by the network device in the various methods of the embodiments of the present application. For the sake of brevity, they are not repeated here.

[0337] Optionally, the computer program product can be applied to the mobile terminal / terminal device in the embodiments of the present application, and the computer program instructions enable the computer to execute the corresponding processes implemented by the mobile terminal / terminal device in the various methods of the embodiments of the present application. For the sake of brevity, they will not be repeated here.

[0338] The embodiment of the present application also provides a computer program.

[0339] Optionally, the computer program can be applied to the network device in the embodiments of the present application. When the computer program runs on a computer, the computer executes the corresponding processes implemented by the network device in the various methods of the embodiments of the present application. For the sake of brevity, they are not described here.

[0340] Optionally, the computer program can be applied to the mobile terminal / terminal device in the embodiments of the present application. When the computer program runs on the computer, the computer executes the corresponding processes implemented by the mobile terminal / terminal device in the various methods of the embodiments of the present application. For the sake of brevity, they will not be repeated here.

[0341] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0342] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0343] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0344] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0345] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0346] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes various media that can store program codes, 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 disk.

[0347] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A channel transmission method, the method comprising: The terminal device receives a repeated transmission of a first physical downlink control channel PDCCH, where the repeated transmission of the first PDCCH corresponds to multiple candidate PDCCHs.

2. The method according to claim 1, wherein The multiple candidate PDCCHs are located in multiple first PDCCH monitoring opportunities of the same search space set.

3. The method according to claim 2, wherein: The multiple first PDCCH monitoring opportunities are located in one or more time slot groups, where the time slot group includes one or more time slots, and the time slot group contains one or more first PDCCH monitoring opportunities.

4. The method according to claim 3, wherein: The number of time slots included in the first time slot group is greater than the number of first PDCCH monitoring opportunities included in the first time slot group, and the first time slot group is one of the one or more time slot groups; or The number of time slots included in the first time slot group is equal to the number of first PDCCH monitoring opportunities included in the first time slot group; The number of time slots included in the first time slot group is smaller than the number of first PDCCH monitoring opportunities included in the first time slot group.

5. The method according to claim 3 or 4, wherein: If the multiple first PDCCH monitoring opportunities are located in multiple time slot groups, and the first time slots in different time slot groups are the same, the first time slot is the time slot in the time slot group where the first PDCCH monitoring opportunity is located.

6. The method according to any one of claims 3 to 5, wherein The indexes of symbols corresponding to the first PDCCH monitoring opportunities in different first time slots are the same, and the first time slot is the time slot where the first PDCCH monitoring opportunity is located in the time slot group.

7. The method according to any one of claims 3 to 6, wherein: The time domain positions of the one or more first PDCCH monitoring opportunities are determined based on one or more of the following first information: The number of time slots contained in the time slot group; An index of a first time slot in a time slot group, where the first time slot is a time slot in the time slot group where the first PDCCH monitoring opportunity occurs; The first PDCCH monitoring opportunity corresponds to a symbol in the first time slot.

8. The method according to claim 7, wherein: The first information is determined according to predefined rules and / or search space set configuration information.

9. The method according to claim 2, wherein: The multiple first PDCCH monitoring opportunities are located in one or more symbol groups, where the symbol group includes one or more symbols, and the symbol group includes one or more first PDCCH monitoring opportunities.

10. The method according to claim 9, wherein: The number of symbols included in the first symbol group is greater than or equal to the number of symbols occupied by the first PDCCH monitoring opportunity.

11. The method according to claim 9 or 10, wherein: If the multiple first PDCCH monitoring opportunities are located in multiple symbol groups, the indexes of symbols corresponding to the first PDCCH monitoring opportunities in different symbol groups are the same.

12. The method according to any one of claims 9 to 11, wherein: The time domain positions of the one or more first PDCCH monitoring opportunities are determined based on one or more of the following second information: The number of symbols contained in the symbol group; The index of the first symbol in the symbol group, where the first symbol is the symbol where the first PDCCH monitoring opportunity is located in the symbol group.

13. The method according to claim 12, wherein: The second information is determined according to predefined rules and / or search space set configuration information.

14. The method according to claim 2, wherein: The multiple first PDCCH monitoring opportunities are consecutive PDCCH monitoring opportunities in the first search space set; or, The multiple first PDCCH monitoring opportunities are consecutive PDCCH monitoring opportunities associated with the same synchronization signal block SSB in the first search space set.

15. The method according to claim 1, wherein The multiple candidate PDCCHs are located in multiple first PDCCH monitoring opportunities on multiple search space sets.

16. The method according to claim 15, wherein For different search space sets in the multiple search space sets, one or more of the following parameters are configured as the same value: PDCCH monitoring period; PDCCH monitoring offset; the number of time slots that last; Number of PDCCH monitoring opportunities in a timeslot.

17. The method according to any one of claims 1 to 16, wherein: The number of repetition transmissions of the first PDCCH is determined by one or more of the following: Control resource set CORESET configuration information or search space set configuration information; The third information in the physical broadcast channel PBCH.

18. The method according to claim 17, wherein: The third information is used to indicate whether to apply the number of repeated transmissions of the first PDCCH indicated by the CORESET configuration information or the search space set configuration information.

19. The method according to any one of claims 1 to 18, wherein: The number of repetitive transmissions of the first PDCCH is associated with an index of the candidate PDCCH or an index of a starting control channel element CCE corresponding to the candidate PDCCH.

20. The method according to any one of claims 1 to 19, wherein The candidate PDCCH indexes of the multiple candidate PDCCHs at corresponding first PDCCH monitoring occasions are the same.

21. The method according to any one of claims 1 to 20, wherein: The monitoring timing for repeated transmission of the first PDCCH is a union of the first PDCCH monitoring timings of the multiple candidate PDCCHs.

22. The method according to any one of claims 1 to 21, wherein The time domain position of the physical downlink shared channel PDSCH or the physical uplink shared channel PUSCH scheduled by the first PDCCH is determined based on the time domain position of the first candidate PDCCH or the last candidate PDCCH among the multiple candidate PDCCHs.

23. A channel transmission method, the method comprising: The network device sends a first PDCCH repetition transmission to the terminal device, where the first PDCCH repetition transmission corresponds to multiple candidate PDCCHs.

24. The method according to claim 23, wherein The multiple candidate PDCCHs are located in multiple first PDCCH monitoring opportunities of the same search space set.

25. The method according to claim 24, wherein The multiple first PDCCH monitoring opportunities are located in one or more time slot groups, where the time slot group includes one or more time slots, and the time slot group contains one or more first PDCCH monitoring opportunities.

26. The method according to claim 25, wherein The number of time slots included in the first time slot group is greater than the number of first PDCCH monitoring opportunities included in the first time slot group, and the first time slot group is one of the one or more time slot groups; or The number of time slots included in the first time slot group is equal to the number of first PDCCH monitoring opportunities included in the first time slot group; The number of time slots included in the first time slot group is smaller than the number of first PDCCH monitoring opportunities included in the first time slot group.

27. The method according to claim 25 or 26, wherein If the multiple first PDCCH monitoring opportunities are located in multiple time slot groups, and the first time slots in different time slot groups are the same, the first time slot is the time slot in the time slot group where the first PDCCH monitoring opportunity is located.

28. The method according to any one of claims 25 to 27, wherein The indexes of symbols corresponding to the first PDCCH monitoring opportunities in different first time slots are the same, and the first time slot is the time slot where the first PDCCH monitoring opportunity is located in the time slot group.

29. The method according to any one of claims 25 to 28, wherein The time domain positions of the one or more first PDCCH monitoring opportunities are determined based on one or more of the following first information: The number of time slots contained in the time slot group; An index of a first time slot in a time slot group, where the first time slot is a time slot in the time slot group where the first PDCCH monitoring opportunity occurs; The first PDCCH monitoring opportunity corresponds to a symbol in the first time slot.

30. The method according to claim 29, wherein The first information is determined according to predefined rules and / or search space set configuration information.

31. The method of claim 24, wherein: The multiple PDCCH monitoring opportunities are located in one or more symbol groups, where the symbol group includes one or more symbols, and the symbol group includes one or more PDCCH monitoring opportunities.

32. The method according to claim 31, wherein The number of symbols included in the first symbol group is greater than or equal to the number of symbols occupied by the first PDCCH monitoring opportunity.

33. The method according to claim 31 or 32, wherein If the multiple PDCCH monitoring opportunities are located in multiple symbol groups, the indexes of symbols corresponding to the first PDCCH monitoring opportunities in different symbol groups are the same.

34. The method according to any one of claims 31 to 33, wherein: The time domain positions of the one or more first PDCCH monitoring opportunities are determined based on one or more of the following second information: The number of symbols contained in the symbol group; The index of the first symbol in the symbol group, where the first symbol is the symbol where the first PDCCH monitoring opportunity is located in the symbol group.

35. The method according to claim 34, wherein The second information is determined according to predefined rules and / or search space set configuration information.

36. The method of claim 24, wherein: The multiple first PDCCH monitoring opportunities are consecutive PDCCH monitoring opportunities in the first search space set; or, The multiple first PDCCH monitoring opportunities are consecutive PDCCH monitoring opportunities associated with the same synchronization signal block SSB in the first search space set.

37. The method of claim 23, wherein: The multiple candidate PDCCHs are located in multiple first PDCCH monitoring opportunities on multiple search space sets.

38. The method of claim 37, wherein: For different search space sets in the multiple search space sets, one or more of the following parameters are configured as the same value: PDCCH monitoring period; PDCCH monitoring offset; the number of time slots that last; Number of PDCCH monitoring opportunities in a timeslot.

39. The method according to any one of claims 23 to 38, wherein The number of repetition transmissions of the first PDCCH is determined by one or more of the following: Control resource set CORESET configuration information or search space set configuration information; The third information in the physical broadcast channel PBCH.

40. The method of claim 39, wherein The third information is used to indicate whether to apply the number of repeated transmissions of the first PDCCH indicated by the CORESET configuration information or the search space set configuration information.

41. The method according to any one of claims 23 to 40, wherein The number of repetitive transmissions of the first PDCCH is associated with an index of the candidate PDCCH or an index of a starting control channel element CCE corresponding to the candidate PDCCH.

42. The method according to any one of claims 23 to 41, wherein The candidate PDCCH indexes of the multiple candidate PDCCHs at corresponding PDCCH monitoring occasions are the same.

43. The method according to any one of claims 23 to 42, wherein The monitoring timing for repeated transmission of the first PDCCH is a union of PDCCH monitoring timings where each candidate PDCCH in the multiple candidate PDCCHs is located.

44. The method according to any one of claims 23 to 43, wherein The time domain position of the physical downlink shared channel PDSCH or the physical uplink shared channel PUSCH scheduled by the first PDCCH is determined based on the time domain position of the first candidate PDCCH or the last candidate PDCCH among the multiple candidate PDCCHs.

45. A terminal device comprising: The first communication unit is configured to receive repeated transmissions of a first physical downlink control channel (PDCCH), where the repeated transmissions of the first PDCCH correspond to a plurality of candidate PDCCHs.

46. A network device comprising: The second communication unit is configured to send a first PDCCH repetition transmission to the terminal device, where the first PDCCH repetition transmission corresponds to multiple candidate PDCCHs.

47. A terminal device comprising: A processor and a memory, the memory being used to store a computer program, the processor being used to call and run the computer program stored in the memory to execute the method according to any one of claims 1 to 22.

48. A network device comprising: A processor and a memory, the memory being used to store a computer program, the processor being used to call and run the computer program stored in the memory to execute the method according to any one of claims 23 to 44.

49. A chip comprising: A processor, configured to call and run a computer program from a memory, so that a device equipped with the chip executes the method according to any one of claims 1 to 22, or executes the method according to any one of claims 23 to 44.

50. A computer-readable storage medium for storing a computer program, wherein the execution of the computer program causes a computer to execute the method according to any one of claims 1 to 22, or the method according to any one of claims 23 to 44.

51. A computer program product comprising computer program instructions, wherein execution of the computer program instructions causes a computer to perform the method according to any one of claims 1 to 22, or the method according to any one of claims 23 to 44.

52. A computer program, wherein the execution of the computer program causes a computer to execute the method according to any one of claims 1 to 22, or the method according to any one of claims 23 to 44.

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