A physical downlink control channel PDCCH transmission method and device

Abstract

The present application provides a physical downlink control channel PDCCH transmission method and device. The method includes, a network device sends a first indication information to a terminal device, the first indication information may include the configuration information of the PDCCH, the configuration information of the PDCCH is used to indicate at least one repetition transmission configuration mode, and the at least one repetition transmission configuration mode includes a first repetition transmission configuration mode. The repetition transmission configuration mode includes at least one of the number of repetitions of the PDCCH and the aggregation level of the PDCCH corresponding to the number of repetitions. The network device can send the PDCCH to the terminal device according to the first repetition transmission configuration mode. The method can achieve the transmission effect of a PDCCH with a higher aggregation level by repeatedly sending multiple PDCCHs with lower aggregation levels, and can avoid excessive continuous time-frequency resources occupied when scheduling the terminal through the PDCCH with a higher aggregation level.

Description

Technical Field

[0001] The present application relates to the field of mobile communication technology, and in particular to a physical downlink control channel (PDCCH) transmission method and device. Background Art

[0002] Currently, the aggregation level (AL) of PDCCH is defined in new radio (NR). The aggregation level refers to the number of control channel elements (CCE) contained in the physical downlink control channel (PDCCH). The current aggregation levels of PDCCH include AL-1, AL-2, AL-4, AL-8 and AL-16. When the UE blindly detects (or blindly detects) the PDCCH according to a certain PDCCH candidate position configured by the network device, it needs to perform blind detection according to each possible aggregation level of the PDCCH.

[0003] Since the transmission of PDCCH with higher aggregation level needs to occupy more resources, for example, the transmission of AL-16 PDCCH needs to occupy 16 consecutive CCEs in a control resource set (CORESET). In some communication scenarios, it is likely that the transmission conditions of higher-level PDCCH are not met. For example, when the working beam bandwidth (BW) of the terminal is 5 MHz and the subcarrier spacing (SCS) of the beam is 15kHz, or when the working BW of the terminal is 10MHz and the subcarrier spacing of the beam, SCS is 30kHz, a CORESET contains at most 3 symbols in the time domain, and there are at most 12 CCEs in a CORESET. At this time, the transmission of AL-16 PDCCH cannot be performed, thereby reducing the transmission performance of PDCCH. Alternatively, even if the CORESET configured by the network device is capable of sending AL-16 or other PDCCHs with higher aggregation levels, due to the large number of continuous CCEs occupied for sending the PDCCH, most of the time-frequency resources in the CORESET may be occupied by the PDCCH scheduling the same terminal, resulting in congestion in the transmission of other PDCCHs.

[0004] In summary, currently too many continuous time-frequency resources are occupied when scheduling a terminal through a PDCCH with a higher aggregation level, resulting in a decrease in the scheduling performance of the terminal, which needs to be optimized. Summary of the invention

[0005] The present application provides a physical downlink control channel (PDCCH) transmission method and device, which are used to optimize the scheduling process of a higher aggregation level PDCCH.

[0006] In a first aspect, the present application provides a physical downlink control channel (PDCCH) transmission method. The method can be executed by a network device or a chip in the network device. The network device may include an access network device, such as a base station, a nodeB, etc.

[0007] According to the method, a network device may send first indication information to a terminal device, the first indication information may include configuration information of a PDCCH, the configuration information is used to indicate at least one repetition transmission configuration mode, the at least one repetition transmission configuration mode includes a first repetition transmission configuration mode. The network device may also send the PDCCH to the terminal device according to the first repetition transmission configuration mode. The repetition transmission configuration mode includes at least one of the number of repetitions of the PDCCH and the aggregation level of the PDCCH corresponding to the number of repetitions.

[0008] By adopting the above method, the network equipment can schedule the terminal through multiple repeatedly sent PDCCHs, and the terminal combines and receives the repeatedly sent PDCCHs, so that the detection performance of the PDCCH is enhanced, so that the sending effect of the PDCCH with a higher aggregation level can be achieved by repeatedly sending multiple PDCCHs with lower aggregation levels. Since the continuous CCEs occupied by each PDCCH with a lower aggregation level are less than the PDCCH with a higher aggregation level, the number of continuously occupied CCEs when sending PDCCHs can be reduced, and the applicable scenarios for scheduling terminals through PDCCHs with higher aggregation levels are expanded, and the probability of PDCCH congestion caused by excessive occupation of CCE resources when scheduling terminals through PDCCHs with higher aggregation levels is reduced, and the scheme for scheduling terminals through PDCCHs with higher aggregation levels is optimized.

[0009] It should be understood that the expression "sending PDCCH" in the present application may also be replaced by "sending DCI via PDCCH". The expression "receiving PDCCH" in the present application may also be replaced by "receiving DCI sent via PDCCH".

[0010] Exemplarily, the first repetitive transmission configuration mode may include that the number of repetitions of the PDCCH is n. The network device may send the PDCCH at n time-frequency resource positions respectively, where n is an integer greater than or equal to 2.

[0011] The first indication information also includes search space information, and the search space information is used to determine the n time-frequency resource positions. For example, the search space information may include information of the n time-frequency resource positions, such as an identifier of the search space or an identifier of a search opportunity in the search space.

[0012] The above n time-frequency resource positions may be determined by at least one search space and at least one control resource set associated with the at least one search space. For example, the n time-frequency resource positions may include n search spaces associated with n control resource sets respectively. Or, for example, the n time-frequency resource positions may include n search spaces in the same control resource set. Or, for another example, the n time-frequency resource positions may include n transmission opportunities in the same search space, such as the n time-frequency resource positions are n consecutive time slots in the search space.

[0013] By adopting the above method, the network device can repeatedly transmit the PDCCH at n time-frequency resource positions, and the terminal device can perform blind detection based on the n time-frequency resource positions, thereby further reducing the complexity of blind detection.

[0014] When the n time-frequency resource positions are located in different time slots, the network device may perform independent channel coding on each of the PDCCHs. In other words, when the n time-frequency resource positions are located in different time slots, the network device may perform independent channel coding on the DCI carried by each of the PDCCHs. Using this method, independent channel coding on each PDCCH can reduce control information processing delay.

[0015] When the n time-frequency resource positions are located in the same time slot, the network device can perform joint channel coding on the PDCCH. In other words, when the n time-frequency resource positions are located in the same time slot, the network device can perform independent channel coding on the DCI carried by multiple PDCCHs. With this method, only one cyclic redundancy check (CRC) needs to be added for joint channel coding of multiple PDCCHs, which results in less overhead, lower equivalent code rate, and better reception performance.

[0016] In an example of repeatedly transmitting the PDCCH, the network device sends data corresponding to the PDCCH to the terminal device via a physical downlink shared channel PDSCH at n first time-frequency resource positions corresponding to the n time-frequency resource positions.

[0017] In another example of repeatedly transmitting the PDCCH, the network device sends the data corresponding to the PDCCH to the terminal device via the PDSCH at the second time-frequency resource position corresponding to the n time-frequency resource positions.

[0018] The above first indication information also includes configuration information for repeatedly transmitting the data corresponding to the PDCCH.

[0019] Specifically, when the network device sends the data corresponding to the PDCCH to the terminal device respectively through the physical downlink shared channel PDSCH at the n first time-frequency resource positions corresponding to the n time-frequency resource positions, the configuration information is used to indicate that the data corresponding to the PDCCH is transmitted at the n first time-frequency resource positions. In other words, at this time, the configuration information is used to indicate the repeated transmission of the data corresponding to the PDCCH.

[0020] In addition, when the network device sends the data corresponding to the PDCCH to the terminal device via the PDSCH at the second time-frequency resource position corresponding to the n time-frequency resource positions, the configuration information is used to indicate that the data corresponding to the PDCCH is transmitted at the second time-frequency resource position. In other words, at this time, the configuration information is used to indicate that the data corresponding to the PDCCH is not transmitted repeatedly.

[0021] The first indication information may also include format information of downlink control information DCI carried by the PDCCH and / or the first candidate position number. The format information may be used to indicate the format of the control information carried by the PDCCH. The first candidate position number may be used to determine the candidate position for receiving the PDCCH.

[0022] In an embodiment of the present application, the network device may also determine a plurality of PDCCHs of lower aggregation levels according to a PDCCH of a higher aggregation level, and repeatedly transmit a plurality of PDCCHs of lower aggregation levels through the above PDCCH transmission method to achieve the transmission effect of the PDCCH of the higher aggregation level. At this time, the PDCCH of the higher aggregation level is no longer transmitted. Among them, the downlink control information carried by the PDCCH of the higher aggregation level is the same as the downlink control information respectively carried by the PDCCHs of the multiple lower aggregation levels. By adopting this method, it is possible to reduce the probability of PDCCH congestion while realizing the transmission of PDCCH of a higher aggregation level to increase the reliability of PDCCH transmission, because the PDCCH no longer has to occupy the number of consecutive CCEs corresponding to the higher aggregation level.

[0023] In a second aspect, the present application provides a physical downlink control channel PDCCH transmission method. The method can be implemented by a terminal device, and can also be executed by a chip in the terminal device. According to the method, the terminal device can receive first indication information from a network device, and the first indication information may include configuration information of the PDCCH, and the configuration information is used to indicate at least one repetition transmission configuration mode, and the at least one repetition transmission configuration mode includes a first repetition transmission configuration mode. The terminal device can receive the PDCCH sent by the network device according to each of the repetition transmission configuration modes, and the PDCCH is sent in the first repetition transmission configuration mode. The above-mentioned repetition transmission configuration mode includes at least one of the number of repetitions of the PDCCH and the aggregation level of the PDCCH corresponding to the number of repetitions.

[0024] The first repetitive transmission configuration mode may include that the number of repetitions of the PDCCH is n. The terminal device may receive the PDCCH sent by the network device at n time-frequency resource positions respectively, where n is an integer greater than or equal to 2.

[0025] The above first indication information also includes search space information, and the search space information is used to determine the positions of the n time-frequency resources.

[0026] The above n time-frequency resource positions are determined by at least one search space and at least one control resource set associated with the at least one search space.

[0027] The terminal device may perform joint channel decoding on the PDCCH.

[0028] The terminal device may respectively receive the data corresponding to the PDCCH from the network device via the physical downlink shared channel PDSCH at the n first time-frequency resource positions corresponding to the n time-frequency resource positions. Alternatively, the terminal device may receive the data corresponding to the PDCCH from the network device via the PDSCH at the second time-frequency resource positions corresponding to the n time-frequency resource positions.

[0029] The above first indication information also includes configuration information for repeatedly transmitting the data corresponding to the PDCCH.

[0030] When the configuration information for repeatedly transmitting the data corresponding to the PDCCH is used to indicate that the data corresponding to the PDCCH is transmitted at the n first time-frequency resource positions respectively, the terminal device can receive the data corresponding to the PDCCH from the network device via the physical downlink shared channel PDSCH at the n first time-frequency resource positions corresponding to the n time-frequency resource positions. When the configuration information for repeatedly transmitting the data corresponding to the PDCCH is used to indicate that the data corresponding to the PDCCH is transmitted at the second time-frequency resource position, the terminal device can receive the data corresponding to the PDCCH from the network device via PDSCH at the second time-frequency resource position corresponding to the n time-frequency resource positions.

[0031] The above first indication information also includes format information of the DCI carried by the PDCCH and / or the number of first candidate positions.

[0032] The terminal device may determine a candidate position for receiving the PDCCH according to the first candidate position number, and receive the PDCCH according to the candidate position.

[0033] In a third aspect, an embodiment of the present application provides a communication device. The communication device can be used to execute the steps performed by the network device in the first aspect or any possible design of the first aspect. The communication device can implement the functions of the above methods in the form of a hardware structure, a software module, or a hardware structure plus a software module.

[0034] When the communication device shown in the third aspect is implemented by a software module, the communication device may include a communication module and a processing module coupled to each other, wherein the communication module can be used to support the communication device to communicate, and the processing module can be used for the communication device to perform processing operations, such as generating information / messages to be sent, or processing received signals to obtain information / messages.

[0035] When executing the steps described in the first aspect above, the communication module may be used to send first indication information to the terminal device, the first indication information includes configuration information of the PDCCH, the configuration information is used to indicate at least one repetition transmission configuration mode, and the at least one repetition transmission configuration mode includes a first repetition transmission configuration mode. The communication module may also be used to send the PDCCH to the terminal device in the first repetition transmission configuration mode. The repetition transmission configuration mode includes at least one of the number of repetitions of the PDCCH and the aggregation level of the PDCCH corresponding to the number of repetitions.

[0036] The first repetitive transmission configuration mode includes that the number of repetitions of the PDCCH is n. The communication module can send the PDCCH at n time-frequency resource positions respectively, where n is an integer greater than or equal to 2.

[0037] The above first indication information also includes search space information, and the search space information is used to determine the positions of the n time-frequency resources.

[0038] The above n time-frequency resource positions are determined by at least one search space and at least one control resource set associated with the at least one search space.

[0039] When the n time-frequency resource positions are located in different time slots, the communication module may perform independent channel coding on each of the PDCCHs.

[0040] When the n time-frequency resource positions are located in the same time slot, the communication module may perform joint channel coding on the PDCCH.

[0041] The communication module may also send the data corresponding to the PDCCH to the terminal device via a physical downlink shared channel PDSCH at the n first time-frequency resource positions corresponding to the n time-frequency resource positions. Alternatively, the communication module may send the data corresponding to the PDCCH to the terminal device via a PDSCH at the second time-frequency resource positions corresponding to the n time-frequency resource positions.

[0042] The above first indication information also includes configuration information for repeatedly transmitting the data corresponding to the PDCCH. When the communication module sends the data corresponding to the PDCCH to the terminal device respectively through the physical downlink shared channel PDSCH at the n first time-frequency resource positions corresponding to the n time-frequency resource positions, the configuration information can be used to indicate that the data corresponding to the PDCCH is transmitted at the n first time-frequency resource positions. Alternatively, when the communication module can send the data corresponding to the PDCCH to the terminal device through PDSCH at the second time-frequency resource positions corresponding to the n time-frequency resource positions, the configuration information can be used to indicate that the data corresponding to the PDCCH is transmitted at the second time-frequency resource position.

[0043] The above first indication information also includes format information of the DCI carried by the PDCCH and / or the number of first candidate positions.

[0044] When the communication device shown in the third aspect is implemented by hardware components, the communication device may include a memory and a processor. The memory may be used to store instructions (or computer programs, programs), and the processor may be used to call and run the instructions from the memory to execute the steps performed by the network device in the first aspect or any possible design of the first aspect.

[0045] The communication device may further include a transceiver for the communication device to communicate.

[0046] Specifically, the transceiver may be used to execute the steps executed by the communication module in the third aspect above, and / or the processor may be used to execute the steps executed by the processing module in the third aspect above.

[0047] In a fourth aspect, an embodiment of the present application provides a communication device. The communication device may be used to execute the steps performed by the terminal device in the second aspect or any possible design of the second aspect. The communication device may implement the functions of the above methods in the form of a hardware structure, a software module, or a hardware structure plus a software module.

[0048] When the communication device shown in the fourth aspect is implemented by a software module, the communication device may include a communication module and a processing module coupled to each other, wherein the communication module can be used to support the communication device to communicate, and the processing module can be used for the communication device to perform processing operations, such as generating information / messages to be sent, or processing received signals to obtain information / messages.

[0049] When executing the steps described in the second aspect above, the communication module may be used to receive first indication information from a network device, wherein the first indication information includes configuration information of a PDCCH, wherein the configuration information is used to indicate at least one repetition transmission configuration mode, wherein the at least one repetition transmission configuration mode includes a first repetition transmission configuration mode. The communication module may also be used to receive the PDCCH sent by the network device in each of the repetition transmission configuration modes, wherein the PDCCH is sent in the first repetition transmission configuration mode. Each of the repetition transmission configuration modes includes at least one of the number of repetitions of the PDCCH and the aggregation level of the PDCCH corresponding to the number of repetitions.

[0050] The first repetitive transmission configuration mode includes that the number of repetitions of the PDCCH is n. The communication module can receive the PDCCH sent by the network device at n time-frequency resource positions respectively, and n is an integer greater than or equal to 2.

[0051] The above first indication information also includes search space information, and the search space information is used to determine the positions of the n time-frequency resources.

[0052] The above n time-frequency resource positions are determined by at least one search space and at least one control resource set associated with the at least one search space.

[0053] The communication module may perform joint channel decoding on the PDCCH.

[0054] The communication module may also receive the data corresponding to the PDCCH from the network device through the physical downlink shared channel PDSCH at the n first time-frequency resource positions corresponding to the n time-frequency resource positions. Alternatively, the communication module may also receive the data corresponding to the PDCCH from the network device through the PDSCH at the second time-frequency resource positions corresponding to the n time-frequency resource positions.

[0055] The communication module may further configure the first indication information to include configuration information for repeatedly transmitting data corresponding to the PDCCH.

[0056] When the configuration information is used to indicate that the data corresponding to the PDCCH is transmitted at the n first time-frequency resource positions, the communication module can receive the data corresponding to the PDCCH from the network device through the physical downlink shared channel PDSCH at the n first time-frequency resource positions corresponding to the n time-frequency resource positions. When the configuration information is used to indicate that the data corresponding to the PDCCH is transmitted at the second time-frequency resource position, the communication module can receive the data corresponding to the PDCCH from the network device through the PDSCH at the second time-frequency resource position corresponding to the n time-frequency resource positions.

[0057] The above first indication information also includes format information of the DCI carried by the PDCCH and / or the number of first candidate positions.

[0058] The communication device may further include a processing module, wherein the processing module may determine a candidate position for receiving the PDCCH according to the first candidate position number. The communication module may receive the PDCCH according to the candidate position.

[0059] When the communication device shown in the fourth aspect is implemented by hardware components, the communication device may include a memory and a processor. The memory may be used to store instructions (or computer programs, programs), and the processor may be used to call and run the instructions from the memory to execute the steps performed by the network device in the second aspect or any possible design of the second aspect.

[0060] The communication device may further include a transceiver for the communication device to communicate.

[0061] Specifically, the transceiver may be used to execute the steps executed by the communication module in the fourth aspect above, and / or the processor may be used to execute the steps executed by the processing module in the fourth aspect above.

[0062] In a fifth aspect, the present application provides a communication system, which may include the communication device shown in the third aspect and the communication device shown in the fourth aspect. The communication device shown in the third aspect may be composed of software modules and / or hardware components. The communication device shown in the fourth aspect may be composed of software modules and / or hardware components.

[0063] Taking the communication device described in the third aspect as a network device and the communication device shown in the fourth aspect as a terminal device as an example, in the communication system provided in the embodiment of the present application, the network device may send a first indication information to the terminal device, and the first indication information may include configuration information of the PDCCH, and the configuration information is used to indicate at least one repetition transmission configuration mode, and the at least one repetition transmission configuration mode includes a first repetition transmission configuration mode. Accordingly, the terminal device may receive the first indication information. The network device may also send the PDCCH to the terminal device according to the first repetition transmission configuration mode. Accordingly, the terminal device may receive the PDCCH sent by the network device according to each of the repetition transmission configuration modes. The repetition transmission configuration mode may include at least one of the number of repetitions of the PDCCH and the aggregation level of the PDCCH corresponding to the number of repetitions.

[0064] In a sixth aspect, the present application provides a computer-readable storage medium, which stores instructions (or computer programs, programs), which, when called and executed on a computer, enable the computer to execute the method described in the above-mentioned first aspect or any possible design of the first aspect, or the second aspect or any possible design of the second aspect.

[0065] In the seventh aspect, the present application provides a computer program product, which may include instructions (or computer programs, programs), which, when run on a computer, enables the computer to execute the method described in the first aspect or any possible design of the first aspect, or the second aspect or any possible design of the second aspect.

[0066] In an eighth aspect, the present application provides a chip and / or a chip system including a chip, which may include a processor. The chip may also include a memory (or storage module) and / or a transceiver (or communication module). The chip can be used to read and execute instructions stored in the memory to execute the method described in the first aspect or any possible design of the first aspect or the second aspect or any possible design of the second aspect. The chip system may be composed of the above-mentioned chip, or may include the above-mentioned chip and other discrete devices, such as a memory (or storage module) and / or a transceiver (or communication module).

[0067] The beneficial effects of the above-mentioned second to eighth aspects and possible designs thereof can refer to the description of the beneficial effects of the method described in the first aspect and any possible design thereof. BRIEF DESCRIPTION OF THE DRAWINGS

[0068] Figure 1 A schematic diagram of a wireless communication system architecture provided in an embodiment of the present application;

[0069] Figure 2 A schematic diagram of a CCE structure provided in an embodiment of the present application;

[0070] Figure 3 A schematic diagram of a PDCCH transmission method provided in an embodiment of the present application;

[0071] Figure 4 A schematic diagram of a PDCCH transmission position provided in an embodiment of the present application;

[0072] Figure 5 A schematic diagram of another PDCCH transmission position provided in an embodiment of the present application;

[0073] Figure 6 A schematic diagram of the structure of a communication device provided in an embodiment of the present application;

[0074] Figure 7 A schematic diagram of the structure of another communication device provided in an embodiment of the present application;

[0075] Figure 8 A schematic diagram of the structure of another communication device provided in an embodiment of the present application;

[0076] Fig. 9 A schematic diagram of the structure of another communication device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0077] like Figure 1 As shown, the PDCCH transmission method provided in the embodiment of the present application can be applied to a wireless communication system 100, which may include a terminal device 101 and a network device 102. The terminal device 101 is configured to support carrier aggregation, and the terminal device 101 can be connected to multiple carrier units of the network device 102, including a main carrier unit and one or more auxiliary carrier units.

[0078] It should be understood that the above wireless communication system 100 can be applied to both low-frequency scenarios (sub 6G) and high-frequency scenarios (above 6G). The application scenarios of the wireless communication system 100 include, but are not limited to, long-term evolution (LTE) systems, LTE frequency division duplex (FDD) systems, LTE time division duplex (TDD) systems, worldwide interoperability for microwave access (WiMAX) communication systems, cloud radio access network (CRAN) systems, future fifth-generation (5G) systems, new radio (NR) communication systems, or future evolved public land mobile networks (PLMN) systems.

[0079] The terminal device 101 shown above may be a user equipment (UE), a terminal, an access terminal, a terminal unit, a terminal station, a mobile station (MS), a remote station, a remote terminal, a mobile terminal, a wireless communication device, a terminal agent or a terminal device, etc. The terminal device 101 may have a wireless transceiver function, and it can communicate with one or more network devices of one or more communication systems (such as wireless communication) and receive network services provided by the network devices, and the network devices here include but are not limited to the network device 102 shown in the figure.

[0080] Among them, the terminal device 101 can be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA) device, a handheld device with wireless communication function, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device, a terminal device in a future 5G network, or a terminal device in a future evolved PLMN network, etc.

[0081] In addition, the terminal device 101 can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; the terminal device 101 can also be deployed on the water surface (such as a ship, etc.); the terminal device 101 can also be deployed in the air (such as an airplane, a balloon, and a satellite, etc.). The terminal device 101 can specifically be a mobile phone, a tablet computer (pad), a computer with wireless transceiver function, a virtual reality (VR) terminal, an augmented reality (AR) terminal, a wireless terminal in industrial control, a wireless terminal in self-driving, a wireless terminal in remote medical, a wireless terminal in smart grid, a wireless terminal in transportation safety, a wireless terminal in smart city, a wireless terminal in smart home, etc. The terminal device 101 can also be a communication chip with a communication module.

[0082] The network device 102 may be an access network device (or access network point). Among them, the access network device refers to a device that provides network access functions, such as a radio access network (RAN) base station, etc. The network device 102 may specifically include a base station (BS), or a base station and a wireless resource management device for controlling the base station, etc. The network device 102 may also include a relay station (relay device), an access point, a base station in a future 5G network, a base station in a future evolved PLMN network, or an NR base station, etc. The network device 102 may be a wearable device or a vehicle-mounted device. The network device 102 may also be a communication chip with a communication module.

[0083] For example, the network device 102 includes, but is not limited to, a next generation base station (g nodeB, gNB) in 5G, an evolved node B (evolved node B, eNB) in an LTE system, a radio network controller (radio network controller, RNC), a node B (node ​​B, NB) in a WCDMA system, a wireless controller under a CRAN system, a base station controller (basestation controller, BSC), a base transceiver station (base transceiverstation, BTS) in a GSM system or a CDMA system, a home base station (for example, home evolved nodeB, or home node B, HNB), a baseband unit (baseBand unit, BBU), a transmission point (transmitting and receiving point, TRP), a transmitting point (transmitting point, TP) or a mobile switching center, etc.

[0084] Taking NR as an example, the processing principle of PDCCH by the terminal device 101 is that the terminal device 101 blindly detects the PDCCH sent by the network device 102 in one or more search spaces (search space, SS) to receive the downlink control information (downlink control information, DCI) carried by the PDCCH (for the sake of simplicity in this application, the downlink control information may also be referred to as control information). Among them, SS is the set of candidate positions where the terminal device 101 needs to blindly detect the PDCCH. The SS includes the common search space (common search space, CSS) and the UE specific search space (UE specific search space, USS), and the concept of control resource set (control resource set, CORESET) is introduced for PDCCH in NR. A CORESET is a candidate time-frequency resource that the terminal device 101 attempts to detect using one or more SSs. The CORESET may include continuous time-frequency resources in the frequency domain. resource blocks and continuous in time domain The time and frequency position of the CORESET can be located at any position of the BWP and a time slot. The time and frequency domain positions of the CORESET can be semi-statically configured by the network device 102 through high-layer signaling.

[0085] The resources used by a PDCCH are composed of one or more CCEs in a CORESET. The number of one or more CCEs corresponds to the AL of the PDCCH. The corresponding relationship between the aggregation level of the PDCCH currently supported by NR and the number of CCEs used by the PDCCH is shown in Table 1. Figure 2 As shown, a CCE may be composed of 6 resource element groups (REGs), each REG includes a symbol in the time domain and a resource block (RB) in the frequency domain. One RB may include 12 resource elements (REs) in the frequency domain.

[0086] Table 1

[0087] PDCCH aggregation level Number of CCEs used by PDCCH 1 1 2 2 4 4 8 8 16 16

[0088] When blindly detecting a PDCCH sent by the network device 102, the terminal device 101 needs to perform detection at each candidate position of each PDCCH configured by the network device 102 according to each possible aggregation level of the PDCCH. Therefore, in the case of an unknown aggregation level of the PDCCH, the terminal device 101 performs multiple blind detections at each candidate position.

[0089] Wherein, repeatedly sending PDCCH (or repeatedly transmitting PDCCH) means transmitting the same DCI respectively through multiple different PDCCHs. In the present application, repeatedly sending PDCCH may also be referred to as repeatedly sending DCI.

[0090] like Figure 3 As shown, the PDCCH transmission method provided in the embodiment of the present application may include the following steps:

[0091] S101: The network device 102 sends first indication information to the terminal device 101, where the first indication information includes configuration information of the PDCCH, where the configuration information is used to indicate at least one repetitive transmission configuration mode, where the at least one repetitive transmission configuration mode includes a first repetitive transmission configuration mode.

[0092] Correspondingly, the terminal device 101 receives the first indication information from the network device 102 .

[0093] S102: The network device 102 sends a PDCCH to the terminal device 101 in a first repetition transmission configuration mode; the repetition transmission configuration mode includes at least one of the number of repetitions of the PDCCH and the aggregation level of the PDCCH corresponding to the number of repetitions.

[0094] S103: The terminal device 101 receives the PDCCH sent by the network device 102.

[0095] By adopting the above method, the network equipment can schedule the terminal through multiple repeatedly sent PDCCHs, and the terminal combines and receives the repeatedly sent PDCCHs, so that the detection performance of PDCCH is enhanced, so that the sending effect of PDCCH with a higher aggregation level can be achieved by repeatedly sending multiple PDCCHs with lower aggregation levels. Since the continuous CCEs occupied by each PDCCH with a lower aggregation level are less than the PDCCH with a higher aggregation level, the number of continuously occupied CCEs when sending PDCCH can be reduced, avoiding excessive continuous time-frequency resources occupied when scheduling the terminal through PDCCH with a higher aggregation level, and optimizing the scheme for scheduling the terminal through PDCCH with a higher aggregation level.

[0096] Exemplarily, the first indication information may carry the correspondence between the number of repetitions of the PDCCH and the aggregation level of the repeatedly transmitted PDCCH as shown in Table 2. Each correspondence may represent a repeated transmission configuration mode, and each repeated transmission configuration mode may also be referred to as a repeated transmission pattern in this application. Alternatively, the first indication information may only carry the contents of the column "Aggregation level of repeatedly transmitted PDCCH" in Table 2, or only carry the contents of the column "Aggregation level of repeatedly transmitted PDCCH" in Table 2.

[0097] Table 2

[0098] index PDCCH repetition times Aggregation level of the repeatedly transmitted PDCCH #1 2 AL-8+AL-8 #2 3 AL-8+AL-4+AL-4 #3 4 AL-4+AL-4+AL-4+AL-4 …… …… ……

[0099] According to Table 2, the network device 102 may send the PDCCH according to one of the multiple repetition transmission configurations. For example, according to the repetition transmission configuration shown in #1, the network device repeatedly sends two AL-8 PDCCHs.

[0100] When the network device 102 repeatedly transmits the PDCCH, in addition to blind detection according to the possible aggregation level of the PDCCH at each candidate position, the terminal device 101 also needs to consider the possible number of repetitions of the PDCCH when blindly detecting the PDCCH. Therefore, when the aggregation level of the PDCCH and the number of repetitions of the PDCCH are unknown, the complexity of the terminal device 101 blindly detecting the PDCCH is too high, which brings a large load to the terminal device 101. The embodiment of the present application provides a PDCCH transmission method for optimizing the PDCCH repetition scheme to reduce the blind detection complexity. The terminal device 101 can blindly detect the PDCCH according to each repeated transmission configuration mode shown in Table 2. The terminal device 101 does not need to perform blind detection according to the number of repetitions of the PDCCH and / or the aggregation level of the PDCCH corresponding to the number of repetitions other than Table 2, thereby reducing the complexity of the terminal device 101 blindly detecting the repeatedly transmitted PDCCH.

[0101] For example, when the network device 102 is configured with information of multiple repetition transmission configuration modes as shown in indexes #1-#3 in Table 2, when the terminal device 101 blindly detects multiple downlink control information, it may blindly detect two PDCCHs with aggregation levels of AL-8 and AL-8 at the candidate positions of the PDCCH according to the repetition transmission configuration mode shown in #1, blindly detect three PDCCHs with aggregation levels of AL-8, AL-4 and AL-4 at the candidate positions of the PDCCH according to the repetition transmission configuration mode shown in #2, and blindly detect four PDCCHs with aggregation levels of AL-4, AL-4, AL-4 and AL-4 at the candidate positions of the PDCCH according to the repetition transmission configuration mode shown in #3. The present application does not limit the order in which the terminal device 101 performs blind detection according to the multiple repetition transmission configuration modes. The terminal device 101 may blindly detect multiple PDCCHs in a random order according to the repetition transmission configuration modes shown in indexes #1, #2 and #3. If multiple PDCCHs indicated by a certain repetition transmission configuration mode can be detected according to the repetition transmission configuration mode, the terminal device 101 may no longer perform blind detection according to other repetition transmission configuration modes.

[0102] In S102, the first repetition transmission configuration includes that the number of repetitions of the PDCCH is n, and the network device 102 can send the PDCCH at n time-frequency resource positions respectively, where n is an integer greater than or equal to 2. The n time-frequency resource positions can be used to transmit the PDCCH respectively.

[0103] The above n time-frequency resource positions may be determined by at least one search space and at least one control resource set associated with the at least one search space.

[0104] For example, n time-frequency resource positions may include n search spaces respectively associated with n control resource sets. Or for example, n time-frequency resource positions may include n search spaces in the same control resource set. Or for another example, n time-frequency resource positions may include n transmission opportunities in the same search space, such as n time-frequency resource positions distributed over n consecutive time slots in the search space. In the present application, transmission opportunity refers to the time domain position of n time-frequency resource positions in the search space, such as a time slot or symbol in the search space.

[0105] Exemplarily, when the above n time-frequency resource positions include multiple search spaces in the same control resource set, the interval between the multiple search spaces is not less than (or greater than) the duration of the control resource set. When the n time-frequency resource positions include multiple transmission opportunities in the same search space, the duration of the search space should be no less than 2 time slots.

[0106] Correspondingly, the terminal device 101 receives PDCCH at n time-frequency resource locations respectively.

[0107] Using the above method, the network device 102 repeatedly sends PDCCH at n time-frequency resource locations, and the terminal device 101 can receive PDCCH at n time-frequency resource locations. For example, the n time-frequency resource locations can be indicated by the network device 102, or can be protocol-defined or preset, thereby further reducing the complexity of the terminal device 101 blindly detecting the repeatedly sent PDCCH.

[0108] Exemplarily, when the network device 102 repeatedly sends the PDCCH at n time-frequency resource locations respectively, the above first repetition transmission configuration method can be used to indicate that the number of repetitions of the PDCCH is n.

[0109] The above n time-frequency resource positions may be indicated by the network device 102 to the terminal device 101. For example, the above first indication information may include search space information, and the search space information may be used to indicate the above n time-frequency resource positions. Alternatively, the network device 102 may send the above search space information to the terminal device 101 through other signaling before or after sending the first indication information. Among them, the search space information may include information such as an identifier (or number, index) of the search space. Specifically, the search space information may include identifiers of multiple search spaces associated with multiple different control resource sets. For another example, the search space information may also include identifiers of multiple search spaces in the same control resource set. In addition, the search space information may include an identifier (or number, index) of a transmission opportunity in the search space to indicate the transmission opportunity in the search space. In the present application, the transmission opportunity of the search space may refer to the time slot included in the search space. For example, the search space information may include the number of the search space and the identifiers of multiple consecutive time slots in the search space to indicate the multiple consecutive time slots.

[0110] It should be understood that when the first indication information does not carry the search space information, the terminal device 101 can determine the n time-frequency resource locations for the network device 102 to send multiple PDCCHs according to the protocol or by preconfiguration.

[0111] In S102, the network device 102 may determine a channel coding method for repeatedly transmitting a PDCCH (or a channel coding method for control information respectively carried by multiple PDCCHs) according to the n time-frequency resource positions.

[0112] In a specific example, when n time-frequency resource positions are located in different time slots, or in other words, multiple PDCCHs that are repeatedly transmitted are located in different time slots, the network device 102 can perform independent channel coding on each PDCCH that is repeatedly transmitted. In other words, at this time, the network device 102 can perform independent channel coding on the control information carried by each PDCCH that is repeatedly transmitted. Accordingly, the terminal device 101 can perform independent channel decoding on the PDCCHs that are transmitted in multiple time slots (or, the control information carried by the PDCCHs that are transmitted in multiple time slots). This method can reduce the control information processing delay. In addition, hybrid automatic repeat request (HARQ) soft merging can be introduced for PDCCH transmission, and the terminal can perform HARQ merging on the repeatedly transmitted PDCCH data and then decode it to improve the PDCCH decoding performance.

[0113] In another specific example, when n time-frequency resource positions are located in the same time slot, or in other words, multiple PDCCHs that are repeatedly transmitted are located in the same time slot, the network device 102 can perform independent channel coding on each PDCCH that is repeatedly transmitted. In other words, at this time, the network device 102 can perform independent channel coding on the control information carried by each PDCCH that is repeatedly transmitted. Accordingly, the terminal device 101 can perform joint channel decoding on the PDCCHs that are respectively transmitted in the same time slot (or, the control information carried by the PDCCHs that are respectively transmitted in the same time slot). Among them, joint channel coding is to uniformly encode the control information carried by multiple PDCCHs, and its advantage is that only one cyclic redundancy check (CRC) needs to be added for each PDCCH, with less overhead, lower equivalent code rate, and better reception performance.

[0114] In an example of S102, the network device 102 can send the data corresponding to the PDCCH to the terminal device 101 through a physical downlink shared channel (PDSCH) at n first time-frequency resource positions corresponding to the n time-frequency resource positions. In other words, in this example, the network device 102 repeatedly transmits the data corresponding to the PDCCH. Correspondingly, the terminal device 101 can receive the data corresponding to the PDCCH from the network device 102 through the PDSCH at n first time-frequency resource positions corresponding to the n time-frequency resource positions. Using this method, the network device 102 can repeatedly transmit the data corresponding to the PDCCH to the terminal device 101.

[0115] In this example, the network device 102 may instruct the terminal device 101 to repeatedly transmit the data corresponding to the PDCCH. Specifically, the network device 102 may carry configuration information for repeatedly transmitting the data corresponding to the PDCCH in the first indication information. The configuration information may be used to indicate that the data corresponding to the PDCCH is transmitted at the n first time-frequency resource positions respectively. Alternatively, the configuration information may be used to indicate that the data corresponding to the PDCCH is repeatedly transmitted. In addition, the configuration information may also be carried in other messages or signaling.

[0116] When the data corresponding to the PDCCH is repeatedly transmitted, in one possible example, the network device 102 may transmit each PDCCH and the data corresponding to each PDCCH in the same time slot. In another possible example, the network device 102 may transmit each PDCCH and the data corresponding to each PDCCH in different time slots.

[0117] In another example of S102, the network device 102 may send the data corresponding to the PDCCH to the terminal device 101 via the PDSCH at the second time-frequency resource position corresponding to the n time-frequency resource positions. In other words, in this example, the network device 102 transmits the PDSCH data corresponding to the PDCCH only once. Accordingly, the terminal device 101 may receive the data corresponding to the PDCCH from the network device 102 via the PDSCH at the second time-frequency resource position corresponding to the n time-frequency resource positions.

[0118] In this example, the network device 102 may carry configuration information for repeatedly transmitting the data corresponding to the PDCCH in the first indication information, wherein the configuration information may be used to indicate that the data corresponding to the PDCCH is transmitted at the second time-frequency resource position. In addition, the configuration information may also be carried in other information messages or signaling.

[0119] When the data corresponding to the PDCCH is not transmitted repeatedly, in one possible example, the network device may transmit multiple repeatedly transmitted PDCCHs in the same time slot, and transmit the data corresponding to the PDCCH (or PDSCH) in another time slot (e.g., the next time slot of the time slot where the PDCCH is located).

[0120] It should be understood that when the first indication information does not carry the configuration information for repeatedly transmitting the data corresponding to the PDCCH, the transmission position of the data corresponding to the PDCCH can be determined according to a protocol or a preconfigured manner. For example, the terminal device 101 and / or the network device 102 may default to repeatedly transmitting the data corresponding to the PDCCH, or default to not repeatedly transmitting the data corresponding to the PDCCH.

[0121] In addition, the above first indication information may also include format information of the DCI carried by the PDCCH and / or the number of first candidate positions, which are respectively described below:

[0122] The format information of the DCI carried by the PDCCH can be used to indicate the format of the control information carried by the PDCCH that is repeatedly sent. Taking the downlink control information as DCI as an example, different formats of DCI are defined in the current wireless communication protocol. Different formats of DCI have different lengths, contents, etc., which are called formats. In the present application, the format information of the DCI carried by the PDCCH can be used by the terminal device 101 to determine which formats of DCI the network device 102 repeatedly sends, so as to reduce the complexity of the terminal blindly detecting the PDCCH. Taking the control information as DCI as an example, the format of the control information described in the present application includes but is not limited to DCIformat: format1_1, format1_0, format0_1 and format0_0.

[0123] Exemplarily, when the format information of the DCI carried by the PDCCH indicates format0_0, the terminal device 101 determines that the network device 102 only repeatedly transmits the DCI of format0_0, so the terminal device 101 may no longer repeatedly monitor the PDCCH carrying other DCI formats. It should be understood that this does not mean that the terminal device 101 does not need to monitor other formats of DCI, but only detects that the repeatedly transmitted DCI is limited to the configured formats of DCI.

[0124] It should be understood that when the first indication information does not carry the format information of the DCI carried by the PDCCH, the terminal device 101 may assume that all formats of control information are repeatedly sent, or the terminal device 101 may determine which formats of DCI are repeatedly sent according to the protocol or through pre-configuration.

[0125] The first number of candidate positions refers to the number of candidate positions of the PDCCH configured by the network device 102 for the terminal device 101. The terminal device 101 determines the candidate positions of the PDCCH according to the number of candidate positions and performs blind detection of the PDCCH according to the candidate positions of the PDCCH.

[0126] In one possible example, the first candidate position number may correspond to the aggregation level of the PDCCH. For example, assuming that the possible aggregation levels of multiple PDCCHs include AL-1, AL-2, AL-4, and AL-8, the terminal device 101 may blindly detect the PDCCH with an aggregation level of AL-1 according to the first candidate position number corresponding to AL-1, and blindly detect the PDCCH with an aggregation level of AL-2 according to the first candidate position number corresponding to AL-2, and blindly detect the PDCCH with an aggregation level of AL-4 according to the first candidate position number corresponding to AL-4, and blindly detect the PDCCH with an aggregation level of AL-8 according to the first candidate position number corresponding to AL-8.

[0127] In another example, the number of first candidate positions may correspond to the time-frequency resource position. For example, the terminal device 101 may blindly detect multiple PDCCHs of different aggregation levels with the same number of first candidate positions in a certain (or some) control resource set, search space, or search opportunity within the search space.

[0128] In addition, the number of first candidate positions may correspond to the terminal device 101, that is, the terminal device 101 blindly detects PDCCHs of multiple different aggregation levels according to the same number of first candidate positions.

[0129] Exemplarily, for a situation where the network device 102 does not repeatedly send the PDCCH, such as when the network device 102 does not send the first indication information, or before sending the first indication information, the terminal device 101 may perform a blind detection of the PDCCH according to the second candidate position number. For a situation where the network device 102 repeatedly sends the PDCCH, such as after the network device 102 sends the first indication information, the terminal device 101 may perform a blind detection of the PDCCH according to the first candidate position number, wherein the first candidate position number may be lower than the second candidate position number, so as to reduce the complexity of the blind detection of the terminal device 101 when repeatedly sending the PDCCH.

[0130] The above number of second candidate positions may be configured by the network device 102 to the terminal device 101 before executing S101, or the number of second candidate positions may be determined by the terminal device 101 according to a protocol or a preconfigured manner.

[0131] In this example, the first indication information may also be used to indicate the candidate position corresponding to the first candidate position number:

[0132] m′ L =ceil(m L / 4); and,

[0133]

[0134] Among them, m′ LIt can represent the candidate position corresponding to the first candidate position number, m L It can represent the candidate position corresponding to the second candidate position number. For example, m L Specifically, it may represent the index of the symbol occupied by the candidate position configured for aggregation level AL-L on slot u.

[0135] According to the first indication information, when determining the value of the first candidate position number, the network device 102 may divide the second candidate position number by four and perform a round-up operation as the value of the first candidate position number. For example, when the second candidate position number is 1 to 4, the first candidate position number is 1; when the second candidate position number is 5 to 8, the first candidate position number is 2.

[0136] It should be understood that when the first indication information does not carry the first candidate position number, the terminal device 101 can determine the first candidate position number according to the protocol or pre-configuration. For example, the terminal device 101 can divide the second candidate position number by four (or other values) and perform a round-up operation as the value of the first candidate position number. For example, after determining that the network device 102 repeatedly transmits the PDCCH, the terminal device 101 can determine the first candidate position number based on the second candidate position number previously configured, defined by the protocol or pre-configured by the network device 102. In addition, it should be understood that in some scenarios, the above first candidate position number is not the actual number of times the terminal device 101 performs blind detection on the PDCCH of each aggregation level. For example, when the continuous CCEs included in CORSET#1 detected by the terminal device 101 are insufficient to transmit n PDCCHs with an aggregation level of m, the terminal device 101 may only perform n0 blind detections on the PDCCHs with an aggregation level of m, where n0 is a positive integer, n0<n, m is the aggregation level of the PDCCH, and the value of m may be 1, 2, 4, 8, or 16. In other words, when K<n*m, the terminal device 101 performs n0 blind detections on the PDCCHs with an aggregation level of m, where K is the maximum number of continuous CCEs included in CORSET#1, where K is a positive integer, and K≥n0*m.

[0137] Taking the bandwidth (BW) of the beam as 5 MHz and the subcarrier spacing (SCS) of the beam as 15 kHz as an example, a CORSET contains at most 3 symbols in the time domain and at most 24 RBs in the frequency domain, so a CORSET contains at most 3*24=72 REGs and at most 12 CCEs. When the terminal device 101 blindly detects the PDCCH of AL-8 in the CORSET, there may be only one candidate position, so the terminal device 101 can only perform one blind detection for the PDCCH of AL-8.

[0138] It should be understood that part or all of the above contents carried in the first indication information of the present application may also be carried in one or more other information, signaling or messages sent by the network device 102 to the terminal device 101, and the present application does not specifically limit this.

[0139] The PDCCH transmission method provided by the embodiment of the present application is further described below by way of examples. It should be understood that in the following examples, the network device 102 is not limited to carrying at least one repetitive transmission configuration mode in the first indication information sent to the terminal device 101, but only carrying at least one repetitive transmission configuration mode in the first indication information is an optional option.

[0140] Embodiment 1

[0141] like Figure 4 As shown, taking the bandwidth of the beam as 5MHz and the subcarrier spacing of the beam as 15kHz as an example, the network device 102 configures a CORESET, called CORESET#X, to the terminal device 101 through RRC signaling. The CORESET#X is a time-frequency resource used by the terminal device 101 to detect the PDCCH candidate position according to SS#M and SS#N. SS#M and SS#N can be exclusive search spaces configured by the network device 102 for the terminal device 101.

[0142] Among them, CORESET#X occupies 3 symbols in the time domain and 4 groups of 6RBs in the frequency domain. The CORESET contains 12 CCEs and supports AL-8 at most. For SS#M, the network device 102 can configure its period to be 10 time slots, the offset to be 0, and the starting symbol in the time slot to be 0; for SS#N, the network device 102 can configure its period to be 10 time slots, the offset to be 1, and the starting symbol in the time slot to be 0. In this example, both SS#M and SS#N occupy 3 symbols.

[0143] Based on S101, the network device 102 may instruct the terminal device 101 to determine that the network device 102 performs repeated transmission of multiple PDCCHs through the first indication information. For example, the first indication information may carry a predefined indication bit to indicate that the network device 102 will transmit multiple repeated PDCCHs. Alternatively, the first indication information may carry at least one repeated transmission configuration mode, and the terminal device 101 may determine that the network device 102 triggers the transmission of the PDCCH according to the at least one repeated transmission configuration mode. Among them, the at least one repeated transmission configuration mode may be as shown in Table 2.

[0144] In addition, the network device 102 may configure the search space information to the terminal device 101 through the first indication information, and the search space information may indicate the time-frequency resource positions of multiple repeated PDCCHs, including: Figure 4SS#M and SS#N shown.

[0145] When repeatedly sending PDCCH, network device 102 can repeatedly send two PDCCHs to terminal device 101 through SS#M and SS#N in time slot #10 and time slot #11, and the aggregation level of each PDCCH is AL-8. Time slot #10 and time slot #11 each contain 14 symbols. Each PDCCH can schedule different PDSCHs, and the data of each PDSCH can be repeated (or, each PDSCH carries the same data).

[0146] The above repeatedly transmitted PDCCH is independently channel coded.

[0147] For the case where the first indication information does not carry at least one repetition transmission configuration mode, when the terminal device 101 receives multiple PDCCHs, since the terminal device 101 does not know the aggregation level of each PDCCH sent by the network device 102 and the number of repetitions of the PDCCH, the terminal device 101 can blindly detect the PDCCHs of AL-1, AL-2, AL-4 and AL-8 on SS#M and SS#N respectively.

[0148] For SS#M, assuming that the maximum number of PDCCH candidate positions for AL-1, AL-2, AL-4 and AL-8 (i.e., the second number of candidate positions above) configured by the network device 102 when the PDCCH is not repeatedly transmitted is 8, according to the method described in the present application, when the terminal device 101 blindly detects multiple repeatedly transmitted PDCCHs, the maximum number of PDCCH candidate positions for AL-1, AL-2, AL-4 and AL-8 (i.e., the first number of candidate positions above) can all be 2. Among them, for AL-8, since the CORESET#X contains only 12 CCEs and supports AL-8 at most, the actual number of blind detections of AL-8 can be 1. Therefore, the terminal device 101 can detect PDCCHs at two listening positions corresponding to AL-1, AL-2 and AL-4 respectively in SS#M, and detect PDCCHs at one listening position corresponding to AL-8. If the terminal device 101 successfully detects the PDCCH, the terminal device 101 can receive the PDSCH on symbols #3-13 of slot#10 according to the PDCCH information. Otherwise, if the PDCCH is not successfully detected, the terminal device 101 stores the monitoring data at each monitoring position of SS#M. For example, the terminal device 101 stores the monitoring data at the monitoring position of SS#M in slot#10 that monitors the PDCCH of AL-1, the monitoring data at the monitoring position that monitors the PDCCH of AL-2, the monitoring data at the monitoring position that monitors the PDCCH of AL-4, and the monitoring data at the monitoring position that monitors the PDCCH of AL-8. After that, the terminal device 101 can continue to monitor slot#11 and detect the PDCCH at SS#N in slot#11.

[0149] For SS#N, the method of blindly detecting PDCCH by terminal device 101 can refer to the above description of blindly detecting PDCCH by terminal device 101 in SS#M. When terminal device 101 detects PDCCH in SS#N, terminal device 101 can receive PDSCH on symbols #3-13 of slot#11 according to PDCCH information. Otherwise, if terminal device 101 fails to successfully detect PDCCH, terminal device 101 can merge the data monitored by each monitoring position with the monitoring data of each monitoring position of terminal device 101 in SS#M, and perform channel decoding according to the merged data.

[0150] In the case where the first indication information carries at least one repetition transmission configuration mode, the terminal device 101 can perform joint channel decoding on the merged data respectively according to each repetition transmission configuration mode.

[0151] Since the network device 102 in this embodiment is only configured with SS#M and SS#N, the number of retransmitted PDCCHs is two, and therefore, among the multiple repetitive transmission configurations shown in indexes #1-#3, only the combination of "AL8+AL8" shown in index #1 can be implemented (that is, the aggregation levels of the two repeatedly transmitted PDCCHs are both AL-8), and therefore the number of blind detections required after merging is 1*1=1. Specifically, the terminal device 101 can merge the monitoring data of the monitoring position where SS#M in slot#10 monitors the PDCCH of AL-8 with the monitoring data of the monitoring position where SS#N in slot#11 monitors the PDCCH of AL-8, and perform blind detection based on the merged data (this method may be called merge decoding).

[0152] When blind detection is performed based on the combined data, the terminal device 101 can perform PDCCH combined decoding based on the CCE resources where the detected DMRS is located. Specifically, the terminal device 101 can use the CCE resources occupied by the DMRS in the monitoring data of SS#M and / or the monitoring data of SS#N as the frequency domain position of the repeatedly transmitted PDCCH, which further reduces the number of PDCCH candidate positions when combined decoding is performed, which is beneficial to reducing the detection complexity of the terminal during the PDCCH repetition process.

[0153] Embodiment 2

[0154] like Figure 5 As shown, still taking the bandwidth of the beam as 5MHz and the subcarrier spacing of the beam as 15kHz as an example, the network device 102 configures CORESET#X and CORESET#Y to the terminal device 101 through RRC signaling. Among them, CORESET#X is the time-frequency resource used by the terminal device 101 to detect the PDCCH candidate position according to SS#M, and CORESET#Y is the time-frequency resource used by the terminal device 101 to detect the PDCCH candidate position according to SS#N. SS#M and SS#N can be exclusive search spaces configured by the network device 102 for the terminal device 101.

[0155] Among them, CORESET#X and CORESET#Y both occupy 2 symbols in the time domain and 4 groups of 6RBs in the frequency domain. Therefore, CORESET#X and CORESET#Y each contain 8 CCEs, and support AL-8 at most. For SS#M, the network device 102 can configure its period to be 10 time slots, the offset to be 0, and the starting symbol in the time slot to be 0; for SS#N, the network device 102 can configure its period to be 10 time slots, the offset to be 0, and the starting symbol in the time slot to be 2. In this example, SS#M and SS#N both occupy 2 symbols.

[0156] Based on S101, the network device 102 may instruct the terminal device 101 to determine that the network device 102 performs repeated transmission of multiple PDCCHs through the first indication information. For example, the first indication information may carry a predefined indication bit to indicate that the network device 102 will transmit multiple repeated PDCCHs. Alternatively, the first indication information may carry at least one repeated transmission configuration mode, and the terminal device 101 may determine that the network device 102 triggers the transmission of the PDCCH according to the at least one repeated transmission configuration mode. Among them, the at least one repeated transmission configuration mode may be as shown in Table 2.

[0157] In addition, the network device 102 may configure the search space information to the terminal device 101 through the first indication information, and the search space information may indicate the time-frequency resource positions of multiple repeated PDCCHs, including: Figure 5 SS#M and SS#N shown.

[0158] When repeatedly sending PDCCH, network device 102 may repeatedly send two PDCCHs to terminal device 101 via SS#M and SS#N in time slot #10, and the aggregation level of each PDCCH is AL-8. Time slot #10 includes 14 symbols. Two repeated PDCCHs may schedule the same PDSCH (or, the two repeated PDCCHs indicate the transmission of the same PDSCH). The PDSCH may be located at symbol #4 to symbol #13 of time slot #10.

[0159] When repeatedly sending the PDCCH, the network device 102 may perform independent channel coding on the control information respectively carried by the two repeated PDCCHs. Correspondingly, the terminal device 101 may perform independent channel decoding on the control information respectively carried by the two repeated PDCCHs.

[0160] If independent channel coding is adopted, the method for the terminal device 101 to blindly detect multiple repeatedly transmitted PDCCHs may refer to the first embodiment.

[0161] In the case where the first indication information does not carry at least one repetitive transmission configuration mode, when receiving the repetitively transmitted PDCCH, the terminal device 101 may Figure 5 The PDCCH with aggregation levels of AL-1, AL-2, AL-4 and AL-8 is blindly detected on SS#M in CORESET#X as shown. If the PDCCH is successfully detected, the terminal device 101 can receive the PDSCH according to the control information carried by the PDCCH. If the PDCCH is not detected, the terminal device 101 stores the monitoring data at each monitoring position of SS#M respectively.

[0162] Afterwards, the terminal device 101 can blindly detect the PDCCH with aggregation levels of AL-1, AL-2, AL-4 and AL-8 on SS#N of CORESET#Y. If the PDCCH is successfully detected, the control information carried by the PDCCH is compared with the control information detected by the terminal device 101 on SS#M. If the two control information are the same, it means that the two control information indicate the transmission of the same PDSCH. Further, the data of the PDSCH can be received.

[0163] If the terminal device 101 fails to successfully detect the PDCCH on SS#N of CORESET#Y, the terminal device 101 may combine and decode the data of the PDCCH listening position received on SS#N with the data of the PDCCH listening position received by the stored SS#M according to the repeated transmission configuration mode configured by the network device 102. If the PDCCH is successfully detected, the PDSCH is received according to the DCI information. The way in which the terminal device 101 performs combined decoding here can refer to the description of the embodiment part.

[0164] In addition, the network device 102 may perform joint channel coding on the control information respectively carried by the two repeated PDCCHs. Correspondingly, the terminal device 101 may perform joint channel decoding on the control information respectively carried by the two repeated PDCCHs.

[0165] In this example, the terminal device 101 needs to continuously monitor SS#M and SS#N, and blindly detect PDCCHs of aggregation levels AL-1, AL-2, AL-4, and AL-8 in SS#M and SS#N. If PDCCH is not detected in both SS#M and SS#N, the terminal device 101 can combine and decode the data of the PDCCH monitoring position received on SS#M with the data of the PDCCH monitoring position received on SS#N according to the repeated transmission configuration mode configured by the network device 102. If PDCCH is successfully detected, PDSCH is received according to DCI information.

[0166] In this embodiment, since the network device 102 in this embodiment is only configured with SS#M and SS#N, the number of retransmitted PDCCHs is two, only the combination of "AL8+AL8" shown in index #1 can be implemented among the multiple repeated transmission configuration modes shown in indexes #1-#3 in Table 2. Therefore, when performing combined decoding, the terminal device 101 only needs to consider the situation where SS#M and SS#N respectively carry a PDCCH with an aggregation level of AL-8. In addition, since there are only 8 CCEs in CORESET#X and CORESET#Y, there is only one AL-8PDCCH detection position on SS#M and SS#N, so the number of blind detections is only 1*1=1. If the decoding is successful, the PDSCH is received according to the control information carried by the PDCCH.

[0167] In the above embodiments 1 and 2, since the bandwidth of the beam and the subcarrier spacing determine that a control resource set includes only 12 CCEs at most, the AL-16 PDCCH cannot be sent. At this time, the network device 102 can repeatedly send two AL-8 PDCCHs for scheduling to achieve the effect of scheduling through the AL-16 PDCCH, thereby expanding the scenario in which the AL-16 PDCCH can be implemented.

[0168] In some embodiments of the present application, when the network device 102 sends a PDCCH with a higher AL to the terminal device 101, the PDCCH with a higher AL may be split into multiple PDCCHs with a lower AL for transmission to reduce the probability of blocking the PDCCH candidate position. For example, there are only 8 CCEs available in a certain slot, and there are currently three terminal devices that need to transmit PDCCH. The first terminal device needs to use AL-8, and the second and third terminal devices need to use AL-2. If the first terminal device is allocated PDCCH resources first and occupies all 8 CCEs, the remaining two terminal devices cannot be allocated PDCCH resources. If the AL-8PDCCH is split into two AL-4PDCCHs for transmission for the first terminal device, the first terminal device only needs to occupy 4 CCEs this time, and the second and third terminal devices can be allocated 2 CCEs. Therefore, on this slot, all three terminal devices can perform PDCCH scheduling transmission.

[0169] When a PDCCH with a higher AL is split into multiple PDCCHs with lower ALs, the sum of the multiple lower ALs is equal to the higher AL. The network device 102 may determine the multiple lower ALs to be split according to at least one repetition transmission configuration mode. For example, at least one repetition transmission configuration mode includes the repetition transmission configuration mode shown in indexes #1-#3 in Table 2. When the aggregation level of the PDCCH to be transmitted is AL-16, the network device 102 may split the PDCCH with a higher AL into multiple PDCCHs with lower ALs according to any one of the repetition transmission configuration modes in indexes #1-#3 in Table 2. Taking index #3 as an example, the network device 102 may split the PDCCH with AL-16 into 4 PDCCHs with AL-4 and send them repeatedly. In this example, the repetition transmission configuration mode shown in index #3 is the first repetition transmission configuration mode when the network device 102 sends multiple PDCCHs.

[0170] Based on the same concept as the above method embodiment, the embodiment of the present application also provides a communication device, which can have the functions of the network device 102 or the terminal device 101 in the above method embodiment, and can be used to execute the steps performed by the network device 102 or the terminal device 101 provided by the above method embodiment. The function can be implemented by hardware, or by software or hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above functions.

[0171] In one possible implementation, Figure 6 The communication device 600 shown can be used as the network device involved in the above method embodiment, and executes the steps performed by the network device (such as the network device 62) in the above method embodiment. Figure 6 As shown, the communication device 600 may include a communication module 601 and a processing module 602, and the communication module 601 and the processing module 602 are coupled to each other. The communication module 601 can be used to support the communication device 600 to communicate, and the communication module 601 can have a wireless communication function, for example, it can communicate wirelessly with other communication devices through a wireless air interface. The processing module 602 can be used to support the communication device 600 to perform the processing actions in the above method embodiment, including but not limited to: generating information and messages sent by the communication module 601, and / or, demodulating and decoding the signal received by the communication module 601, etc.

[0172] When executing the steps implemented by the network device, the communication module 601 may be used to send first indication information to the terminal device, the first indication information including configuration information of the PDCCH, the configuration information being used to indicate at least one repetition transmission configuration mode, the at least one repetition transmission configuration mode including a first repetition transmission configuration mode. The communication module 601 may also be used to send the PDCCH to the terminal device in the first repetition transmission configuration mode. The repetition transmission configuration mode includes at least one of the number of repetitions of the PDCCH and the aggregation level of the PDCCH corresponding to the number of repetitions.

[0173] The first repetition transmission configuration mode includes that the number of repetitions of the PDCCH is n. The communication module 601 can send the PDCCH at n time-frequency resource positions respectively, where n is an integer greater than or equal to 2.

[0174] The above first indication information also includes search space information, and the search space information is used to determine the positions of the n time-frequency resources.

[0175] The above n time-frequency resource positions are determined by at least one search space and at least one control resource set associated with the at least one search space.

[0176] When the n time-frequency resource locations are located in different time slots, the communication module 601 may perform independent channel coding on each of the PDCCHs.

[0177] When the n time-frequency resource locations are located in the same time slot, the communication module 601 may perform joint channel coding on the PDCCH.

[0178] The communication module 601 may also send the data corresponding to the PDCCH to the terminal device via the physical downlink shared channel PDSCH at the n first time-frequency resource positions corresponding to the n time-frequency resource positions. Alternatively, the communication module 601 may send the data corresponding to the PDCCH to the terminal device via the PDSCH at the second time-frequency resource positions corresponding to the n time-frequency resource positions.

[0179] The above first indication information also includes configuration information for repeatedly transmitting the data corresponding to the PDCCH. When the communication module 601 sends the data corresponding to the PDCCH to the terminal device respectively through the physical downlink shared channel PDSCH at the n first time-frequency resource positions corresponding to the n time-frequency resource positions, the configuration information can be used to indicate that the data corresponding to the PDCCH is transmitted at the n first time-frequency resource positions. Alternatively, when the communication module 601 can send the data corresponding to the PDCCH to the terminal device through PDSCH at the second time-frequency resource positions corresponding to the n time-frequency resource positions, the configuration information can be used to indicate that the data corresponding to the PDCCH is transmitted at the second time-frequency resource position.

[0180] The above first indication information also includes format information of the DCI carried by the PDCCH and / or the number of first candidate positions.

[0181] In addition, the processing module 602 may determine multiple PDCCHs of lower aggregation levels based on a PDCCH of a higher aggregation level, wherein the sum of the aggregation levels of the multiple PDCCHs of the lower aggregation levels is equal to the higher aggregation level. The communication module 601 may also be used to repeatedly send the multiple PDCCHs of the lower aggregation levels. The manner in which the communication module 601 repeatedly sends the multiple PDCCHs of the lower aggregation levels may refer to the PDCCH transmission method provided in the embodiment of the present application. For example, the communication module 601 may send the multiple PDCCHs of the lower aggregation levels to the terminal device according to the first repetition transmission configuration mode in at least one repetition transmission configuration mode, wherein the first repetition transmission configuration mode includes the number of the multiple PDCCHs of the lower aggregation levels and the multiple lower aggregation levels.

[0182] In another possible implementation, the communication device provided in the embodiment of the present application may also be composed of hardware components, such as a processor, a memory, or a transceiver.

[0183] For ease of understanding, Figure 7 The structure of the communication device is described by taking a base station as an example. Figure 7 As shown, the communication device 700 may include a transceiver 701, a memory 702, and a processor 703. The transceiver 701 may be used for the communication device to communicate, such as for sending or receiving the first information. The memory 702 is coupled to the processor 703 and may be used to store the programs and data necessary for the communication device 700 to implement various functions. The processor 703 is configured to support the communication device 700 to perform the corresponding functions in the above method, and the functions may be implemented by calling the programs stored in the memory 702.

[0184] Specifically, the transceiver 701 may be a wireless transceiver, which may be used to support the communication device 700 to receive and send signaling and / or data through a wireless air interface. The transceiver 701 may also be referred to as a transceiver unit or a communication unit. The transceiver 701 may include a radio frequency unit and one or more antennas, wherein the radio frequency unit, such as a remote radio unit (RRU), may be specifically used for the transmission of radio frequency signals and the conversion of radio frequency signals and baseband signals, and the one or more antennas may be specifically used for the radiation and reception of radio frequency signals. Optionally, the transceiver 701 may include only the above radio frequency unit, in which case the communication device 700 may include a transceiver 701, a memory 702, a processor 703, and an antenna.

[0185] The memory 702 and the processor 703 may be integrated into one or may be independent of each other. Figure 7 As shown, the memory 702 and the processor 703 can be integrated into the control unit 710 of the communication device 700. Exemplarily, the control unit 710 may include a baseband unit (BBU) of an LTE base station, which may also be referred to as a digital unit (DU), or the control unit 710 may include a distributed unit (DU) and / or a centralized unit (CU) in a base station under 5G and future wireless access technologies. The above-mentioned control unit 710 may be composed of one or more single boards, wherein multiple single boards may jointly support a wireless access network of a single access standard (such as an LTE network), and multiple single boards may also respectively support wireless access networks of different access standards (such as an LTE network, a 5G network or other networks). The memory 702 and the processor 703 may serve one or more single boards. In other words, the memory 702 and the processor 703 may be separately set on each single board. It is also possible that multiple single boards share the same memory 702 and processor 703. In addition, necessary circuits may be set on each single board, such as the circuit that can be used to achieve the coupling of the memory 702 and the processor 703. The above transceiver 701, processor 703 and memory 703 may be connected via a bus structure and / or other connection media.

[0186] based on Figure 7In the structure shown, when the communication device 700 needs to send data, the processor 703 can perform baseband processing on the data to be sent, and then output the baseband signal to the RF unit. The RF unit performs RF processing on the baseband signal and then sends the RF signal in the form of electromagnetic waves through the antenna. When data is sent to the communication device 700, the RF unit receives the RF signal through the antenna, converts the RF signal into a baseband signal, and outputs the baseband signal to the processor 703. The processor 703 converts the baseband signal into data and processes the data.

[0187] Based on Figure 7 In the structure shown, the transceiver 701 can be used to execute the steps executed by the communication module 601 above. And / or, the processor 703 can be used to call the instructions in the memory 702 to execute the steps executed by the processing module 602 above.

[0188] In one possible implementation, Figure 8 The communication device 800 shown can be used as the terminal device 101 involved in the above method embodiment, and executes the steps performed by the terminal device 101 in the above method embodiment. Figure 8 As shown, the communication device 800 may include a communication module 801 and a processing module 802, and the communication module 801 and the processing module 802 are coupled to each other. The communication module 801 can be used to support the communication device 800 to communicate, and the communication module 801 can have a wireless communication function, for example, it can communicate wirelessly with other communication devices through a wireless air interface. The processing module 802 can be used to support the communication device 800 to perform the processing actions in the above method embodiment, including but not limited to: generating information and messages sent by the communication module 801, and / or, demodulating and decoding the signal received by the communication module 801, etc.

[0189] When executing the steps performed by the terminal device 101, the communication module 801 can be used to receive first indication information from a network device, the first indication information includes configuration information of a PDCCH, the configuration information is used to indicate at least one repetition transmission configuration mode, and the at least one repetition transmission configuration mode includes a first repetition transmission configuration mode. The communication module 801 can also be used to receive the PDCCH sent by the network device in each of the repetition transmission configuration modes, and the PDCCH is sent in the first repetition transmission configuration mode. Each of the repetition transmission configuration modes includes at least one of the number of repetitions of the PDCCH and the aggregation level of the PDCCH corresponding to the number of repetitions.

[0190] The first repetitive transmission configuration mode includes that the number of repetitions of the PDCCH is n. The communication module 801 can receive the PDCCH sent by the network device at n time-frequency resource positions respectively, where n is an integer greater than or equal to 2.

[0191] The above first indication information also includes search space information, and the search space information is used to determine the positions of the n time-frequency resources.

[0192] The above n time-frequency resource positions are determined by at least one search space and at least one control resource set associated with the at least one search space.

[0193] The communication module 801 may perform joint channel decoding on the PDCCH.

[0194] The communication module 801 may also receive the data corresponding to the PDCCH from the network device through the physical downlink shared channel PDSCH at the n first time-frequency resource positions corresponding to the n time-frequency resource positions. Alternatively, the communication module 801 may also receive the data corresponding to the PDCCH from the network device through the PDSCH at the second time-frequency resource positions corresponding to the n time-frequency resource positions.

[0195] The communication module 801 may further configure the first indication information to include configuration information for repeatedly transmitting data corresponding to the PDCCH.

[0196] When the configuration information is used to indicate that the data corresponding to the PDCCH is transmitted at the n first time-frequency resource positions, the communication module 801 can receive the data corresponding to the PDCCH from the network device through the physical downlink shared channel PDSCH at the n first time-frequency resource positions corresponding to the n time-frequency resource positions. When the configuration information is used to indicate that the data corresponding to the PDCCH is transmitted at the second time-frequency resource position, the communication module 801 can receive the data corresponding to the PDCCH from the network device through the PDSCH at the second time-frequency resource position corresponding to the n time-frequency resource positions.

[0197] The above first indication information also includes format information of the DCI carried by the PDCCH and / or the number of first candidate positions.

[0198] The communication device may further include a processing module 802, and the processing module 802 may determine a candidate position for receiving the PDCCH according to the first candidate position number. The communication module 801 may receive the PDCCH according to the candidate position.

[0199] When the communication device is a terminal device 101, its structure may also be as follows: Fig. 9 As shown. For ease of understanding and illustration, Fig. 9 In the figure, the terminal device 101 takes a mobile phone as an example to illustrate the structure of the communication device. Fig. 9 As shown, the communication device 900 may include a processor 901 , a memory 902 , and a transceiver 903 .

[0200] The above processor 901 can be used to process the communication protocol and communication data, and control the communication device 900, execute the software program, process the data of the software program, etc. The memory 902 can be used to store programs and data, and the processor 901 can execute the method performed by the terminal device 101 in the embodiment of the present application based on the program.

[0201] The transceiver 903 may include a radio frequency unit and an antenna. The radio frequency unit may be used for conversion between baseband signals and radio frequency signals and for processing radio frequency signals. The antenna may be used for transmitting and receiving radio frequency signals in the form of electromagnetic waves. In addition, the radio frequency unit may be regarded as the transceiver 903 only, and in this case, the communication device 900 may include a processor 901, a memory 902, a transceiver 903, and an antenna.

[0202] In addition, the communication device 900 may also include an input / output device 904, such as a touch screen, display screen or keyboard, which can be used to receive data input by a user and output data to the user. It should be noted that some types of communication devices may not have input / output devices.

[0203] based on Fig. 9 In the structure shown, when the communication device 900 needs to send data, the processor 901 can perform baseband processing on the data to be sent, and then output the baseband signal to the RF unit. The RF unit performs RF processing on the baseband signal and then sends the RF signal in the form of electromagnetic waves through the antenna. When data is sent to the communication device 900, the RF unit receives the RF signal through the antenna, converts the RF signal into a baseband signal, and outputs the baseband signal to the processor 901. The processor 901 converts the baseband signal into data and processes the data.

[0204] Exemplarily, the communication device 900 may be used to execute the steps performed by the terminal device 101. Specifically, the transceiver 903 may be used to execute the steps performed by the communication module 801, and / or the processor 901 may be used to call the instructions stored in the memory 902 to execute the steps performed by the processing module 802.

[0205] Based on the same concept as the above embodiment, the embodiment of the present application further provides a computer-readable storage medium, on which some instructions are stored, and when these instructions are called and executed, the computer can execute the steps performed by the network device 102 and / or the terminal device 101 in the above method embodiment and any possible implementation of the method embodiment. In the embodiment of the present application, the readable storage medium is not limited, for example, it can be a RAM (random-access memory), a ROM (read-only memory), etc.

[0206] Based on the same concept as the above-mentioned method embodiment, the embodiment of the present application also provides a computer program product. When the computer program product is run by a computer, it can enable the computer to execute the steps performed by the network device 102 and / or the terminal device 101 in the above-mentioned method embodiment and any possible implementation of the method embodiment.

[0207] Based on the same concept as the above method embodiment, the embodiment of the present application further provides a communication system, which may include the network device 102 and / or the terminal device 101 provided in the embodiment of the present application.

[0208] Exemplarily, in the communication system, the network device 102 may send first indication information to the terminal device 101, and the first indication information may include configuration information of the PDCCH, and the configuration information is used to indicate at least one repetition transmission configuration mode, and the at least one repetition transmission configuration mode includes a first repetition transmission configuration mode. Accordingly, the terminal device 101 may receive the first indication information. The network device 102 may also send the PDCCH to the terminal device 101 according to the first repetition transmission configuration mode. Accordingly, the terminal device 101 may receive the PDCCH sent by the network device 102 according to each of the repetition transmission configuration modes. The repetition transmission configuration mode may include at least one of the number of repetitions of the PDCCH and the aggregation level of the PDCCH corresponding to the number of repetitions.

[0209] Based on the same concept as the above method embodiment, the embodiment of the present application further provides a chip. The chip may include a processor, and the processor may be coupled to a transceiver. The chip may be used for a first device or a second device to implement the functions involved in the network device 102 and / or the terminal device 101 in any possible design of the above method embodiment or the method embodiment.

[0210] In addition, the embodiment of the present application also provides a chip system. The chip system may include the above chip, and may also include a chip and other discrete devices. For example, the chip system may include a chip, a memory, and a communication module. The chip system can be used to implement the above network device 102 and / or terminal device 101.

[0211] It should be understood that the processor and processing module involved in the above embodiments may be a general-purpose processor, a digital signal processor, an application-specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component, which can implement or execute the methods, steps, and logic block diagrams disclosed in the embodiments of the present application. A general-purpose processor may be a microprocessor or any conventional processor, etc. The steps of the method disclosed in the embodiments of the present application may be directly embodied as being executed by a hardware processor, or may be executed by a combination of hardware and software modules in the processor.

[0212] The memory may be a non-volatile memory, such as a hard disk drive (HDD) or a solid-state drive (SSD), etc., or a volatile memory (volatile memory), such as a random-access memory (RAM). The memory is any other medium that can be used to carry or store the desired program code in the form of instructions or data structures and can be accessed by a computer, but is not limited thereto. The memory in the embodiment of the present application may also be a circuit or any other device that can implement a storage function, for storing program instructions and / or data.

[0213] The transceiver and communication module may be a circuit, a device, a communication interface, a bus, a software module, a wireless transceiver or any other component that can realize information / data transmission and reception.

[0214] The above embodiments can be implemented in whole or in part by software, hardware (such as circuits), firmware or any other combination. When implemented using software, the above embodiments can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions or computer programs. When the computer instructions or computer programs are loaded or executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from one website site, computer, server or data center to another website site, computer, server or data center by wired (such as infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that contains one or more available media sets. The available medium can be a magnetic medium (for example, a floppy disk, a hard disk, a tape), an optical medium (for example, a DVD), or a semiconductor medium. The semiconductor medium can be a solid-state hard disk.

Claims

1. A physical downlink control channel PDCCH transmission method, characterized in that: include: The network device determines n second aggregation levels of the PDCCH according to the first aggregation level, where the sum of the n second aggregation levels is equal to the first aggregation level, and n is the number of repetitions of the PDCCH corresponding to the second aggregation level; The network device sends first indication information to the terminal device, where the first indication information includes configuration information of the PDCCH, where the configuration information is used to indicate at least one repetitive transmission configuration mode, where the at least one repetitive transmission configuration mode includes a first repetitive transmission configuration mode, where the first repetitive transmission configuration mode includes the n second aggregation levels and n, where n is an integer greater than or equal to 2; The network device sends the PDCCH to the terminal device in the first repetition transmission configuration mode.

2. The method according to claim 1, characterized in that The network device sends the PDCCH to the terminal device in the first repetitive transmission configuration mode, including: The network device sends the PDCCH at n time-frequency resource positions respectively.

3. The method according to claim 2, characterized in that The first indication information also includes search space information, and the search space information is used to determine the positions of the n time-frequency resources.

4. The method according to claim 2 or 3, characterized in that The n time-frequency resource positions are determined by at least one search space and at least one control resource set associated with the at least one search space.

5. The method according to claim 2 or 3, characterized in that: When the n time-frequency resource positions are located in different time slots, the network device sends the PDCCH to the terminal device in the first repetitive transmission configuration mode, including: The network device performs independent channel coding on each of the PDCCHs.

6. The method according to claim 2 or 3, characterized in that: When the n time-frequency resource positions are located in the same time slot, the network device sends the PDCCH to the terminal device in the first repetitive transmission configuration mode, including: The network device performs joint channel coding on the PDCCH.

7. The method according to claim 2 or 3, characterized in that: The method further comprises: The network device sends the data corresponding to the PDCCH to the terminal device respectively at the n first time-frequency resource positions corresponding to the n time-frequency resource positions through the physical downlink shared channel PDSCH; or, The network device sends the data corresponding to the PDCCH to the terminal device via the PDSCH at the second time-frequency resource position corresponding to the n time-frequency resource positions.

8. The method according to claim 7, characterized in that The first indication information also includes configuration information for repeatedly transmitting data corresponding to the PDCCH; The configuration information for repeatedly transmitting the data corresponding to the PDCCH is used to indicate that the data corresponding to the PDCCH is transmitted at the n first time-frequency resource positions; or, The configuration information for repeatedly transmitting the data corresponding to the PDCCH is used to indicate that the data corresponding to the PDCCH is transmitted at the second time-frequency resource position.

9. The method according to any one of claims 1 to 3 or 8, characterized in that: The first indication information further includes at least one of the following information: Format information of downlink control information DCI carried by the PDCCH; or, A first candidate position number, where the first candidate position number is used by the terminal device to determine a candidate position for receiving the PDCCH.

10. A physical downlink control channel PDCCH transmission method, characterized in that: include: The terminal device receives first indication information from the network device, where the first indication information includes configuration information of the PDCCH, where the configuration information is used to indicate at least one repetitive transmission configuration mode, where the at least one repetitive transmission configuration mode includes a first repetitive transmission configuration mode, where the first repetitive transmission configuration mode includes n second aggregation levels and a number of repetitions n of the PDCCH corresponding to the second aggregation level, where n is an integer greater than or equal to 2, the n second aggregation levels are determined according to the first aggregation level, and the sum of the n second aggregation levels is equal to the first aggregation level; The terminal device receives the PDCCH sent by the network device in combination with each of the repetitive transmission configurations, and the PDCCH is sent in the first repetitive transmission configuration.

11. The method according to claim 10, characterized in that The terminal device receives the PDCCH sent by the network device in combination with each of the repeated transmission configurations, including: The terminal device receives the PDCCH sent by the network device at n time-frequency resource positions respectively.

12. The method according to claim 11, characterized in that The first indication information also includes search space information, and the search space information is used to determine the positions of the n time-frequency resources.

13. The method according to claim 11 or 12, characterized in that The n time-frequency resource positions are determined by at least one search space and at least one control resource set associated with the at least one search space.

14. The method according to claim 11 or 12, characterized in that: The terminal device receives the PDCCH sent by the network device in combination with each of the repeated transmission configurations, including: The terminal device performs joint channel decoding on the PDCCH.

15. The method according to claim 11 or 12, characterized in that The method further comprises: The terminal device receives data corresponding to the PDCCH from the network device respectively at n first time-frequency resource positions corresponding to the n time-frequency resource positions through a physical downlink shared channel PDSCH; or, The terminal device receives data corresponding to the PDCCH from the network device via the PDSCH at a second time-frequency resource position corresponding to the n time-frequency resource positions.

16. The method according to claim 15, characterized in that The first indication information also includes configuration information for repeatedly transmitting data corresponding to the PDCCH; The configuration information for repeatedly transmitting the data corresponding to the PDCCH is used to indicate that the data corresponding to the PDCCH is transmitted at the n first time-frequency resource positions respectively; or, The configuration information for repeatedly transmitting the data corresponding to the PDCCH is used to indicate that the data corresponding to the PDCCH is transmitted at the second time-frequency resource position.

17. The method according to any one of claims 10 to 12 or 16, characterized in that The first indication information further includes at least one of the following information: Format information of downlink control information DCI carried by the PDCCH; or, A first candidate position number, where the first candidate position number is used to determine a candidate position for receiving the PDCCH.

18. The method according to claim 17, characterized in that The method further comprises: The terminal device determines a candidate position for receiving the PDCCH according to the first candidate position number; The terminal device receives the PDCCH sent by the network device in combination with each of the repeated transmission configurations, including: The terminal device receives the PDCCH according to the candidate position.

19. A communication device, characterized in that: include: A processing module, configured to determine n second aggregation levels of the PDCCH according to the first aggregation level, where the sum of the n second aggregation levels is equal to the first aggregation level, and n is the number of repetitions of the PDCCH corresponding to the second aggregation level; a communication module, configured to send first indication information to a terminal device, wherein the first indication information includes configuration information of the PDCCH, the configuration information is used to indicate at least one repetitive transmission configuration mode, the at least one repetitive transmission configuration mode includes a first repetitive transmission configuration mode, the first repetitive transmission configuration mode includes the n second aggregation levels and n, where n is an integer greater than or equal to 2; The communication module is also used to send the PDCCH to the terminal device in the first repetition transmission configuration mode.

20. The communication device according to claim 19, characterized in that The communication module is specifically used for: The PDCCH is sent at n time-frequency resource positions respectively.

21. The communication device according to claim 20, characterized in that The first indication information also includes search space information, and the search space information is used to determine the positions of the n time-frequency resources.

22. The communication device according to claim 20 or 21, characterized in that: The n time-frequency resource positions are determined by at least one search space and at least one control resource set associated with the at least one search space.

23. The communication device according to claim 20 or 21, characterized in that: When the n time-frequency resource positions are located in different time slots, the communication module is specifically used to: Independent channel coding is performed on each of the PDCCHs.

24. The communication device according to claim 20 or 21, characterized in that: When the n time-frequency resource positions are located in the same time slot, the communication module is specifically used to: Joint channel coding is performed on the PDCCH.

25. The communication device according to claim 20 or 21, characterized in that: The communication module is also used for: sending the data corresponding to the PDCCH to the terminal device respectively at the n first time-frequency resource positions corresponding to the n time-frequency resource positions through the physical downlink shared channel PDSCH; or, The data corresponding to the PDCCH is sent to the terminal device via the PDSCH at a second time-frequency resource position corresponding to the n time-frequency resource positions.

26. The communication device according to claim 25, characterized in that The first indication information also includes configuration information for repeatedly transmitting data corresponding to the PDCCH; The configuration information for repeatedly transmitting the data corresponding to the PDCCH is used to indicate that the data corresponding to the PDCCH is transmitted at the n first time-frequency resource positions; or, The configuration information for repeatedly transmitting the data corresponding to the PDCCH is used to indicate that the data corresponding to the PDCCH is transmitted at the second time-frequency resource position.

27. The communication device according to any one of claims 19 to 21 or 26, characterized in that: The first indication information further includes at least one of the following information: Format information of downlink control information DCI carried by the PDCCH; or, A first candidate position number, where the first candidate position number is used to determine a candidate position for receiving the PDCCH.

28. A communication device, characterized in that: include: a communication module, configured to receive first indication information from a network device, the first indication information including configuration information of a PDCCH, the configuration information being used to indicate at least one repetitive transmission configuration mode, the at least one repetitive transmission configuration mode including a first repetitive transmission configuration mode, the first repetitive transmission configuration mode including n second aggregation levels and a number of repetitions n of the PDCCH corresponding to the second aggregation level, the n being an integer greater than or equal to 2, the n second aggregation levels being determined according to the first aggregation level, and the sum of the n second aggregation levels being equal to the first aggregation level; The communication module is further used to receive the PDCCH sent by the network device in combination with each of the repeated transmission configuration modes, and the PDCCH is sent in the first repeated transmission configuration mode; Each of the repetition transmission configurations includes at least one of a repetition number of the PDCCH and an aggregation level of the PDCCH corresponding to the repetition number.

29. The communication device according to claim 28, characterized in that The communication module is specifically used for: The PDCCH sent by the network device is received at n time-frequency resource positions respectively.

30. The communication device according to claim 29, characterized in that The first indication information also includes search space information, and the search space information is used to determine the positions of the n time-frequency resources.

31. The communication device according to claim 29 or 30, characterized in that: The n time-frequency resource positions are determined by at least one search space and at least one control resource set associated with the at least one search space.

32. The communication device according to claim 29 or 30, characterized in that: The communication module is specifically used for: Perform joint channel decoding on the PDCCH.

33. The communication device according to claim 29 or 30, characterized in that: The communication module is also used for: Receiving data corresponding to the PDCCH from the network device respectively at n first time-frequency resource positions corresponding to the n time-frequency resource positions through a physical downlink shared channel PDSCH; or, Data corresponding to the PDCCH is received from the network device via the PDSCH at a second time-frequency resource position corresponding to the n time-frequency resource positions.

34. The communication device according to claim 33, characterized in that The first indication information also includes configuration information for repeatedly transmitting data corresponding to the PDCCH; The configuration information for repeatedly transmitting the data corresponding to the PDCCH is used to indicate that the data corresponding to the PDCCH is transmitted at the n first time-frequency resource positions respectively; or, The configuration information for repeatedly transmitting the data corresponding to the PDCCH is used to indicate that the data corresponding to the PDCCH is transmitted at the second time-frequency resource position.

35. The communication device according to any one of claims 28 to 30 or 34, characterized in that: The first indication information further includes at least one of the following information: Format information of downlink control information DCI carried by the PDCCH; or, A first candidate position number, where the first candidate position number is used to determine a candidate position for receiving the PDCCH.

36. The communication device according to claim 35, characterized in that The communication device further includes a processing module, wherein the processing module is configured to: Determine a candidate position for receiving the PDCCH according to the first candidate position number; The communication module is specifically used for: The PDCCH is received according to the candidate position.

37. A communication device, characterized in that: including a processor and a memory; The memory is used to store computer programs; The processor is configured to execute the computer program to implement the method according to any one of claims 1 to 9.

38. A communication device, characterized in that: including a processor and a memory; The memory is used to store computer programs; The processor is configured to execute the computer program to implement the method according to any one of claims 10 to 18.

39. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores instructions, and when the instructions are called and executed on a computer, the computer executes the method according to any one of claims 1 to 18.

40. A chip, characterized in that: The chip comprises a processor coupled to a memory, and is used to read and execute instructions stored in the memory to perform the method according to any one of claims 1 to 18.

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