A communication method and related device

Abstract

The application relates to a communication method and related devices, and relates to the technical field of communication. The method is applied to a network device and comprises the following steps: indicating configuration information of a target search space (SS) physical downlink control channel (PDCCH), wherein the configuration information comprises a maximum retransmission number; determining a retransmission time domain position of the SS PDCCH; and repeatedly sending the SS PDCCH at the retransmission time domain position until the maximum retransmission number is reached. In this way, by repeatedly sending the SS PDCCH at the determined retransmission time domain position until the maximum retransmission number is reached, the corresponding transmission performance requirement can be met, the loss of wireless communication is reduced, the downlink coverage is enhanced, and the communication quality is improved.

Description

A communication method and related equipment

[0001] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office of China on January 15, 2024, with application number 202410061189.9 and invention name “A communication method and related equipment”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of communication technology, and in particular to a communication method and related equipment. Background Art

[0003] Since traditional terrestrial networks cannot provide seamless coverage, especially in places where base stations cannot be deployed, such as the sea, desert, and air, satellite communication technology has emerged with the development of communication technology, especially the continuous development of new-generation mobile communication technologies such as the fifth generation mobile networks (5G).

[0004] Satellite communication technology refers to communications technology in which terrestrial radio communication equipment uses satellites as relays. A satellite communication system consists of a satellite segment and a ground segment. The ground segment includes network equipment such as base stations and terminals, including user equipment (UE). Base stations can communicate with terminals via downlinks or uplinks. Specifically, an uplink refers to the link from a terminal to a base station, while a downlink refers to the link from a base station to a terminal. Each base station typically has a coverage area, also known as a coverage area.

[0005] In related technologies, achieving seamless network coverage through satellite communications requires base stations to simultaneously transmit multiple downlink beams. However, base stations are unable to concentrate energy in a few beams, which in turn limits signal energy. This results in significant wireless communication losses and limited downlink coverage. Therefore, enhancing downlink coverage and improving communication quality have become key concerns in the industry. Summary of the Invention

[0006] The purpose of this application is to provide a communication method and related equipment that can enhance downlink coverage and improve communication efficiency.

[0007] In a first aspect, the present application provides a communication method, applicable to electronic devices such as base stations, comprising: indicating configuration information of a physical downlink control channel (PDCCH) of a target search space (SS), the configuration information including maximum retransmission count information; determining an available retransmission time domain location for the SS PDCCH; and repeatedly transmitting the SS PDCCH at the available retransmission time domain location based on the maximum retransmission count information. Thus, by repeatedly transmitting the SS PDCCH multiple times at the determined retransmission time domain location until the maximum retransmission count is reached, corresponding transmission performance requirements can be met, wireless communication losses can be reduced, downlink coverage can be enhanced, and communication quality can be improved.

[0008] In some specific implementations, the configuration information also includes initial transmission configuration information and / or transmission cycle information.

[0009] In some specific implementations, the length of the transmission period is the sum of the target number of time slots; the method for determining the transmission time domain position of the PDCCH of the SS includes: determining whether the starting time slot in the transmission period satisfies the following formula, (2 μ ×10n f +n s )modT=Offset slot

[0010] Among them, μ is the subcarrier spacing parameter, n f is the system frame number, n s is the time slot number in the wireless frame, T is the transmission period, offset slot is the period offset value. If satisfied, the time window defined by the starting time slot and duration T is determined as the SS PDCCH transmission period. Within the SS PDCCH transmission period, the SS PDCCH initial transmission time domain position and / or available retransmission time domain position are determined. Thus, by repeatedly transmitting the SS PDCCH at the determined retransmission time domain positions until the maximum number of retransmissions is reached, the corresponding transmission performance requirements can be met, wireless communication losses can be reduced, downlink coverage can be enhanced, and communication quality can be improved.

[0011] Optionally, the parameter μ of the subcarrier spacing within the above system frame may be specifically referred to Section 4.2 of the protocol 3GPP TS 38.211, as shown in Table 1 below:

[0012] Table 1

[0013] As can be seen from Table 1, the above subcarrier spacing parameter μ can specifically be the value in Table 1 above.

[0014] In some specific implementations, determining the initial transmission time domain position of the PDCCH of the SS within the PDCCH transmission period of the SS includes: using the first transmission opportunity within the PDCCH transmission period of the SS as the initial transmission time domain position of the PDCCH of the SS.

[0015] In some specific implementations, the target SS is a common search space (CSS), and determining available retransmission time domain positions for the SS's PDCCH includes: determining a set of retransmission time domain positions for retransmitting the CSS's PDCCH; and within a transmission period of the CSS's PDCCH, determining the time domain positions after the initial transmission time domain position in the retransmission time domain position set as available retransmission time domain positions for the CSS's PDCCH. Thus, by repeatedly transmitting the SS PDCCH at the determined retransmission time domain positions until a maximum number of retransmissions is reached, corresponding transmission performance requirements can be met, wireless communication losses can be reduced, downlink coverage can be enhanced, and communication quality can be improved.

[0016] In some specific implementations, indicating the configuration information of the physical downlink control channel PDCCH of the target search space SS includes: indicating the configuration information of the PDCCH of the CSS through the first system information block SIB1 signaling or the radio resource control RRC signaling.

[0017] In some specific implementations, the SS's PDCCH is repeatedly transmitted at available retransmission time domain locations based on the maximum retransmission count information. This includes: determining an initial PDCCH candidate set for the initial CSS's PDCCH; and, at available retransmission time domain locations, repeatedly transmitting the CSS's PDCCH based on the maximum retransmission count information and the retransmission PDCCH candidate set, where the retransmission PDCCH candidate set corresponds to the initial PDCCH candidate set. This can conserve resources and reduce blind detection complexity.

[0018] In some specific implementations, the SS PDCCH is repeatedly transmitted at available retransmission time domain locations based on the maximum retransmission count information. This includes: determining the initially transmitted SS for the initially transmitted CSS PDCCH; and, at retransmission time domain locations, repeatedly transmitting the CSS PDCCH based on the maximum retransmission count information and the retransmission SS, with the PDCCH candidate set for the retransmission SS being the same as the PDCCH candidate set for the initially transmitted SS. This saves resources and reduces blind detection complexity.

[0019] In some specific implementations, the configuration information also includes frequency domain resource CORESET configuration information.

[0020] In some specific implementations, the target SS is a dedicated search space (USS), and determining the available retransmission time domain positions for the PDCCH of the SS includes: determining a retransmission time domain position set for retransmitting the PDCCH of the USS based on the CORESET configuration information corresponding to the USS; and determining the time domain positions after the initial transmission time domain position in the retransmission time domain position set as the available retransmission time domain positions for the PDCCH of the USS. Thus, by repeatedly transmitting the SS PDCCH at the determined retransmission time domain positions multiple times until the maximum number of retransmissions is reached, corresponding transmission performance requirements can be met, wireless communication losses can be reduced, downlink coverage can be enhanced, and communication quality can be improved.

[0021] In some specific implementations, indicating the configuration information of the physical downlink control channel PDCCH of the target search space SS includes: indicating the configuration information of the PDCCH of the USS through RRC signaling.

[0022] In a second aspect, the present application provides a communication method for use in electronic devices such as mobile phones and computers, comprising: receiving configuration information for a target search space (SS) physical downlink control channel (PDCCH), the configuration information including a maximum number of retransmissions; and repeatedly receiving the SS PDCCH at a retransmission time domain location until the maximum number of retransmissions is reached. Thus, by repeatedly receiving the SS PDCCH at a determined retransmission time domain location until the maximum number of retransmissions is reached, corresponding transmission performance requirements can be met, wireless communication losses can be reduced, downlink coverage can be enhanced, and communication quality can be improved.

[0023] In some specific implementations, repeatedly receiving the SS's PDCCH based on the maximum retransmission count information includes: if the signal quality of the SS's PDCCH is less than or equal to a quality threshold, repeatedly receiving the SS's PDCCH based on the maximum retransmission count information. Thus, by repeatedly receiving the SS PDCCH multiple times at the determined retransmission time domain position until the maximum retransmission count is reached, corresponding transmission performance requirements can be met, wireless communication losses can be reduced, downlink coverage can be enhanced, and communication quality can be improved.

[0024] In some specific implementations, the configuration information also includes initial transmission configuration information and / or transmission cycle information.

[0025] In some specific implementations, the length of the transmission period is the sum of the target number of time slots; the method for determining the transmission time domain position of the PDCCH of the SS includes: determining whether the starting time slot in the transmission period satisfies the following formula, (2 μ ×10n f +n s )modT=Offset slot

[0026] Among them, μ is the subcarrier spacing parameter, nf is the system frame number, n s is the time slot number in the wireless frame, T is the transmission period, offset slot is the period offset value; if satisfied, the time window determined by the starting time slot and the duration T is determined as the transmission period of the SS's PDCCH; within the transmission period of the SS's PDCCH, the initial transmission time domain position and / or the available retransmission time domain position of the SS's PDCCH are determined. Thus, by repeatedly receiving the SS PDCCH multiple times at the determined retransmission time domain position until the maximum number of retransmissions is reached, the corresponding transmission performance requirements can be met, wireless communication losses can be reduced, downlink coverage can be enhanced, and communication quality can be improved. Thus, by repeatedly receiving the SS PDCCH multiple times at the determined retransmission time domain position until the maximum number of retransmissions is reached, the corresponding transmission performance requirements can be met, wireless communication losses can be reduced, downlink coverage can be enhanced, and communication quality can be improved.

[0027] In some specific implementations, determining an initial transmission time domain position of the SS's PDCCH within a PDCCH transmission period of the SS includes determining the first transmission opportunity within the PDCCH transmission period of the SS as the initial transmission time domain position of the SS's PDCCH. Thus, by repeatedly receiving the SS PDCCH at the determined retransmission time domain position until a maximum number of retransmissions is reached, corresponding transmission performance requirements can be met, wireless communication losses can be reduced, downlink coverage can be enhanced, and communication quality can be improved.

[0028] In some specific implementations, the target SS is a common search space (CSS), and determining available retransmission time domain positions for the SS's PDCCH includes: determining a set of retransmission time domain positions for retransmitting the CSS's PDCCH; and within a transmission period of the CSS's PDCCH, determining the time domain positions after the initial transmission time domain position in the retransmission time domain position set as available retransmission time domain positions for the CSS's PDCCH. Thus, by repeatedly receiving the SS PDCCH at the determined retransmission time domain positions until a maximum number of retransmissions is reached, corresponding transmission performance requirements can be met, wireless communication losses can be reduced, downlink coverage can be enhanced, and communication quality can be improved.

[0029] In some specific implementations, receiving configuration information of a physical downlink control channel PDCCH of a target search space SS includes: receiving configuration information of the PDCCH of the CSS through first system information block SIB1 signaling or radio resource control RRC signaling.

[0030] In some specific implementations, at available retransmission time domain locations, the SS PDCCH is repeatedly received based on the maximum retransmission count information, including: determining an initial transmission PDCCH candidate set for the initial transmission CSS PDCCH; and at available retransmission time domain locations, based on the maximum retransmission count information and the retransmission PDCCH candidate set, repeatedly receiving the CSS PDCCH, where the retransmission PDCCH candidate set corresponds to the initial transmission PDCCH candidate set. Thus, by repeatedly receiving the SS PDCCH multiple times at the determined retransmission time domain locations until the maximum retransmission count is reached, corresponding transmission performance requirements can be met, wireless communication losses can be reduced, downlink coverage can be enhanced, and communication quality can be improved.

[0031] In some specific implementations, at available retransmission time domain locations, the SS PDCCH is repeatedly received based on maximum retransmission count information, including: determining an initially transmitted SS for an initially transmitted CSS PDCCH; and at retransmission time domain locations, based on the maximum retransmission count information and the retransmission SS, repeatedly receiving the CSS PDCCH, where the PDCCH candidate set for the retransmission SS is the same as the PDCCH candidate set for the initially transmitted SS. Thus, by repeatedly receiving the SS PDCCH multiple times at the determined retransmission time domain locations until the maximum retransmission count is reached, corresponding transmission performance requirements can be met, wireless communication losses can be reduced, downlink coverage can be enhanced, and communication quality can be improved.

[0032] In some specific implementations, the configuration information also includes frequency domain resource CORESET configuration information.

[0033] In some specific implementations, the target SS is a dedicated search space (USS), and determining the available retransmission time domain positions for the PDCCH of the SS includes: determining a retransmission time domain position set for retransmitting the PDCCH of the USS based on the CORESET configuration information corresponding to the USS; and determining the time domain positions after the initial transmission time domain position in the retransmission time domain position set as the available retransmission time domain positions for the PDCCH of the USS. Thus, by repeatedly receiving the SS PDCCH at the determined retransmission time domain positions until the maximum number of retransmissions is reached, corresponding transmission performance requirements can be met, wireless communication losses can be reduced, downlink coverage can be enhanced, and communication quality can be improved.

[0034] In some specific implementations, sending the configuration information of the target search space SS physical downlink control channel PDCCH includes: sending the configuration information of the PDCCH of the USS through RRC signaling.

[0035] In a third aspect, the present application provides a network device, comprising: a memory for storing computer programs or computer instructions; and a processor for executing the computer programs or computer instructions stored in the memory, so that the network device performs the method of the first aspect.

[0036] In a fourth aspect, the present application provides a terminal device, which includes: a memory for storing computer programs or computer instructions; and a processor for executing the computer programs or computer instructions stored in the memory, so that the terminal device executes the method of the second aspect.

[0037] In a fifth aspect, the present application provides a communication system, which includes a first device and a second device, the first device is used to execute the method as in the first aspect, and the second device is used to execute the method as in the second aspect.

[0038] In a sixth aspect, the present application provides a computer storage medium for storing a computer program, which, when executed, is used to implement the methods of the first and second aspects.

[0039] In a seventh aspect, the present application provides a communication device, which is applied to electronic devices such as base stations, and includes: an information indication module, a position determination module, and a repeated transmission module; the information indication module is used to indicate the configuration information of the target search space SS physical downlink control channel PDCCH, and the configuration information includes the maximum number of retransmissions; the position determination module is used to determine the retransmission time domain position of the SS PDCCH; the repeated transmission module is used to repeatedly transmit the SS PDCCH at the retransmission time domain position until the maximum number of retransmissions is reached. Therefore, by repeatedly transmitting the SS PDCCH multiple times at the determined retransmission time domain position until the maximum number of retransmissions is reached, the corresponding transmission performance requirements can be met, the loss of wireless communication can be reduced, the downlink coverage can be enhanced, and the communication quality can be improved.

[0040] In an eighth aspect, the present application provides a communication device, which is applied to electronic devices such as mobile phones and computers, and includes: an information receiving module and a repeated receiving module; the information receiving module is used to receive configuration information of a target search space (SS) physical downlink control channel (PDCCH), the configuration information including a maximum number of retransmissions; and the repeated receiving module is used to repeatedly receive the SS PDCCH at a retransmission time domain position until the maximum number of retransmissions is reached. Thus, by repeatedly receiving the SS PDCCH multiple times at a determined retransmission time domain position until the maximum number of retransmissions is reached, corresponding transmission performance requirements can be met, wireless communication losses can be reduced, downlink coverage can be enhanced, and communication quality can be improved.

[0041] Based on the above technical solution, this application has the following beneficial effects:

[0042] The present application provides a communication method and related equipment. After indicating configuration information of a target search space (SS) physical downlink control channel (PDCCH) containing a maximum number of retransmissions, the method determines a retransmission time domain location for the SS PDCCH and repeatedly transmits the SS PDCCH at the retransmission time domain location until the maximum number of retransmissions is reached. Thus, by repeatedly transmitting the SS PDCCH at the determined retransmission time domain location until the maximum number of retransmissions is reached, corresponding transmission performance requirements can be met, wireless communication losses can be reduced, downlink coverage can be improved, and communication efficiency can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] FIG1 is an example diagram of a scenario of communication between a base station and a terminal provided in an embodiment of the present application;

[0044] FIG2A is a flow chart of a communication method for CSS PDCCH provided in an embodiment of the present application;

[0045] FIG2B is a flowchart of a communication method for USS PDCCH provided in an embodiment of the present application;

[0046] FIG3 is a flow chart of another communication method provided in an embodiment of the present application;

[0047] FIG4 is a schematic diagram of the hardware composition of an electronic device provided in an embodiment of the present application;

[0048] FIG5 is a schematic diagram of the hardware composition of another electronic device provided in an embodiment of the present application;

[0049] FIG6 is a schematic diagram of a communication device provided in an embodiment of the present application;

[0050] FIG7 is a schematic diagram of another communication device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0051] The terms "first", "second" and "third" in the specification, claims and drawings of this application are used to distinguish different objects rather than to limit a specific order.

[0052] In the embodiments of this application, words such as "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of this application should not be interpreted as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner.

[0053] The embodiments of the present application are applied to a communication system. The communication system may be a second-generation (2G) communication system, a third-generation (3G) communication system, an LTE system, a fifth-generation (5G) communication system, a Long Term Evolution (LTE) and 5G hybrid architecture, a 5G New Radio (5G NR) system, or any new communication system that may emerge in future communication developments.

[0054] The communication system includes a first device and a second device. The first device can be a device on the network side for providing network communication functions, which is sometimes also called a network device or a network element. The network device can generally be a base station (including a functional unit of a base station, or a combination of functional units of a base station) or a core network unit, wherein the core network unit can be a functional unit in the core network, including but not limited to an access and mobility management function (AMF) unit or a session management function (SMF) unit. The second device can be a device for accessing the network, which can generally be a terminal. See Figure 1, which is an example diagram of a scenario of communication between a base station and a terminal provided in an embodiment of the present application. Figure 1 includes base station 1 and terminal 2.

[0055] In the embodiments provided in the present application, the base station can be any device with wireless transceiver functions, including but not limited to: an evolved base station (NodeB or eNB or e-NodeB, evolutionary Node B) in long term evolution (LTE), a base station (gNodeB or gNB) or a transmission receiving point (TRP) in new radio (NR), a base station of subsequent evolution of 3GPP, an access node in a Wi-Fi system, a wireless relay node, a wireless backhaul node, etc. The base station can be: a macro base station, a micro base station, a pico base station, a small station, a relay station, or a balloon station, etc. The base station can include one or more co-site or non-co-site transmission points (Transmission Reception Point, TRP). The base station can also be a wireless controller, a centralized unit (CU), and / or a distributed unit (DU) in a cloud radio access network (CRAN) scenario. The base station can communicate with the terminal, or communicate with the terminal through a relay station. The terminal can communicate with multiple base stations of different technologies. For example, the terminal can communicate with a base station supporting the LTE network, and can also communicate with a base station supporting the 5G network. It can also establish dual connections with a base station supporting the LTE network and a base station supporting the 5G network.

[0056] In the embodiments provided herein, the terminal may be in various forms, such as a mobile phone, a tablet computer, a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal in industrial control, a vehicle-mounted terminal device, a wireless terminal in self-driving, a wireless terminal in remote medical, a wireless terminal in a smart grid, a wireless terminal in transportation safety, a wireless terminal in a smart city, a wireless terminal in a smart home, a wearable terminal device, etc. The terminal may also be sometimes referred to as a terminal device, user equipment (UE), access terminal device, vehicle-mounted terminal, industrial control terminal, UE unit, UE station, mobile station, mobile station, remote station, remote terminal device, mobile device, UE terminal device, terminal device, wireless communication device, UE agent or UE device, etc. The terminal may also be a fixed terminal or a mobile terminal.

[0057] As mentioned earlier, satellite communication technology came into being because traditional terrestrial networks cannot provide seamless coverage, especially in places where base stations cannot be deployed, such as the sea, desert, and air.

[0058] Satellite communication technology has the following characteristics. First, it has a wide communication range. Communication is possible between any two points within the range of the satellite's radio waves. Satellite communication can address communication issues in areas where current cellular communication systems are inaccessible or costly to cover. Second, satellite communication technology is not susceptible to land-based disasters and is highly reliable. In extreme situations such as disasters (such as earthquakes) that render cellular communication infrastructure unavailable, satellite communication can quickly establish a communication connection. Third, satellite communication technology offers low latency, making it suitable for industry applications. For example, for latency-sensitive services transmitted over long distances, satellite communication can be used to reduce transmission latency.

[0059] In related technologies, during the project discussions for 3GPP Release 19 NTN (Non-Terrestrial Network) proposed by standardization organizations such as the 3rd Generation Partnership Project (3GPP), considering the need to utilize satellite communication technology to achieve seamless network coverage, base stations are required to generate multiple downlink beams simultaneously. A beam is a communication resource. A beam can be wide, narrow, or other types of beams, and the beam formation technology can be beamforming or other techniques.

[0060] However, since the base station cannot concentrate energy on a few beams, signal aggregation cannot be achieved, which causes huge losses in wireless communications and limits downlink coverage.

[0061] In view of this, the present application provides a communication method and related equipment. After indicating the configuration information of the target search space (SS) physical downlink control channel (PDCCH) containing the maximum number of retransmissions, the method determines the retransmission time domain position of the SS PDCCH and repeatedly transmits the SS PDCCH at the retransmission time domain position until the maximum number of retransmissions is reached. Thus, by repeatedly transmitting the SS PDCCH at the determined retransmission time domain position until the maximum number of retransmissions is reached, the corresponding transmission performance requirements can be met, wireless communication losses can be reduced, downlink coverage can be improved, and communication quality can be enhanced.

[0062] In order to make the technical solution of the present application clearer and easier to understand, the communication method of the present application is introduced below with reference to the accompanying drawings.

[0063] Refer to Figure 2A, which is a flow chart of a communication method for CSS PDCCH provided in an embodiment of the present application. It should be noted that the communication method provided in the embodiment of the present application is for communication of the common search space (CSS) PDCCH other than the first system information block (System Information Block 1, SIB1) physical downlink control channel (Physical downlink control channel, PDCCH), namely SIB1 PDCCH, namely CSS PDCCH. The communication method can be executed by a network device in the communication system, such as a base station. The method includes the following steps:

[0064] S201: The network device indicates the configuration information of the CSS.

[0065] CSS configuration information is divided into initial configuration information and additional configuration information.

[0066] The initial transmission configuration information is based on the configuration information specified in the R18 protocol (or the previous 3GPP NR protocol), including the time-frequency resources and the initial transmission time domain location set of the initial transmission CSS PDCCH.

[0067] Specifically, the CORESET configuration of the time-frequency resources, or CSS PDCCH, is semi-statically configured via higher-layer signaling. The CORESET includes information such as the frequency band occupied by the PDCCH in the frequency domain and the number of Orthogonal Frequency Division Multiplexing (OFDM) symbols occupied in the time domain. The CORESET can appear anywhere in the slot in the time domain and reside within the bandwidth part (BWP) in the frequency domain.

[0068] The initial transmission time domain position set refers to the CSS PDCCH monitoring position (PDCCH Monitoring Occasion, PMO) set, that is, the monitoring opportunity. It should be noted that the application does not limit the number of PMOs in the initial transmission PMO set, and it can be one or more.

[0069] The additional configuration information refers to the configuration information of the CSS indicated through SIB1 signaling or RRC signaling.

[0070] Among them, in 5G NR, SIB1 signaling carries information on whether the second device is allowed to access the coverage of the first device (that is, information on whether the user equipment is allowed to access the cell), and the basic information required for the second device to access the coverage of the first device, that is, the additional configuration information of the CSS mentioned above. RRC signaling is wireless signaling or lower-layer signaling used to handle the signaling interaction between the first device and the second device. The 3GPP specification TS36.331 defines RRC signaling in detail. The RRC signaling can carry additional configuration information of the CSS.

[0071] Specifically, the additional configuration information of the CSS includes: the transmission period T, the period offset value offsetslot, and the maximum number of retransmissions. The length of the transmission period T can be represented by the number of radio frames (T = 10ms), or subframes (T = 1ms), or time slots (T = 125ns). For example, a transmission period T can be 32 time slots, that is, T = 1us (microsecond). The period offset value offsetslot requires network configuration or protocol agreement by relevant technical personnel. If the period offset value offsetslot is not configured in the network, it defaults to 0.

[0072] S202: The network device determines the actual time domain position of the initially transmitted CSS PDCCH.

[0073] If the transmission period T of the additional configuration information in step S201 is in units of time slots, then it is necessary to determine whether the starting time slot in the transmission period satisfies the following formula (1): (2 μ 10n f +n s )modT=Offset slot (1)

[0074] Among them, μ is the subcarrier spacing parameter, n f is the system frame number, n s is the time slot number in the wireless frame, T is the transmission period, offset slot is the period offset value. Specifically, μ is the subcarrier spacing parameter of the OFDM system.

[0075] If the starting time slot in the transmission period T satisfies the above formula (1), the time window determined by the starting time slot and the duration T is determined as the transmission period of the CSS PDCCH. Subsequently, within the transmission period of the CSS PDCCH, the actual time domain position of the CSS PDCCH, i.e., the initial transmission time domain position and / or the available retransmission time domain position, is determined.

[0076] In some specific implementations, the method for determining the initial transmission time domain position of the PDCCH of the CSS is: within the transmission period of the PDCCH of the CSS, the first transmission opportunity is used as the initial transmission time domain position of the PDCCH of the CSS.

[0077] In some specific implementations, the method for determining the available retransmission time domain position of the PDCCH of the CSS is: first, determine the retransmission time domain position set for retransmitting the PDCCH of the CSS; then, within the transmission period of the PDCCH of the CSS, determine the time domain position after the initial transmission time domain position in the retransmission time domain position set as the available retransmission time domain position of the PDCCH of the CSS.

[0078] It should be noted that the above embodiment is described based on the transmission period T in slots. If the transmission period T of the additional configuration information in step S201 is in radio frames or subframes, it is similar to the above formula and will not be repeated here.

[0079] S203: The network device sends the CSS PDCCH for the first time at the actual time domain position of the initial CSS PDCCH transmission.

[0080] After determining the actual time domain position of the initially transmitted CSS PDCCH, the first device may initially send the CSS PDCCH at the actual time domain position.

[0081] S204: The network device constrains the retransmission PDCCH candidate set and the retransmission PDCCH search space.

[0082] Due to the large system bandwidth in NR, if the PDCCH occupies the entire bandwidth in the frequency domain, it will not only waste resources but also greatly complicate the subsequent blind monitoring of the second device. The process of the second device searching for PDCCH on the time-frequency resources is called blind detection. Therefore, in order to reduce the complexity of the subsequent blind detection of the second device and save blind detection resources, the first device needs to constrain the retransmission PDCCH candidate set (candidate PDCCH) and the retransmission PDCCH search space (SS).

[0083] For constraining the retransmission PDCCH candidate set, in some specific implementations, the retransmission PDCCH candidate set can be constrained to be consistent with the initial transmission PDCCH candidate set, thereby reducing the complexity of the subsequent blind detection by the second device. For example, if the initial transmission PDCCH candidate set is the first candidate set, the retransmission PDCCH candidate set can also be constrained to be the first candidate set. In other specific implementations, the retransmission PDCCH candidate set can be constrained to be associated with the initial transmission PDCCH candidate set, so that the only corresponding retransmission PDCCH candidate set can be inferred from the initial transmission PDCCH candidate set. It should be noted that this application does not limit the specific inference rules.

[0084] For the retransmission PDCCH search space, the retransmission PDCCH search space can be constrained to be consistent with the initial transmission PDCCH search space, thereby reducing the complexity of subsequent blind detection by the second device. For example, if the initial transmission PDCCH search space is the first search space, the retransmission PDCCH candidate set can also be constrained to the first search space.

[0085] It should be noted that the above S204 is an optional step of the embodiment of the present application, and the communication method of the embodiment of the present application may not execute the above S204.

[0086] S205: The network device repeatedly sends the CSS PDCCH at the retransmission time domain position according to the constrained retransmission PDCCH candidate set and the retransmission PDCCH search space.

[0087] The retransmission time domain position refers to the time domain position in the PMO set excluding the actual time domain position of the initial transmission CSS PDCCH (i.e., the initial transmission PMO). After determining the actual time domain position of the initial transmission CSS PDCCH in step S203, the PMOs excluding the initial transmission PMO within each transmission period T are used as the retransmission PMO set. That is, the time domain positions after the initial transmission time domain position are determined as the retransmission time domain positions of the retransmission CSS PDCCH. Thus, the CSS PDCCH is repeatedly sent at the retransmission time domain position until the maximum number of retransmissions indicated in the additional configuration information is reached.

[0088] Referring to FIG. 2B , which is a flow chart of a communication method for USS PDCCH provided in an embodiment of the present application. It should be noted that the communication method provided in an embodiment of the present application is for communication with a dedicated search space (UE-specific SS, USS) corresponding to a second device UE. The communication method can be executed by a network device in a communication system, such as a base station. The method comprises the following steps:

[0089] S211: The network device indicates the configuration information of the USS through the RRC signaling dedicated to the second device.

[0090] If USS PDCCH is to be communicated, reference should be made to 3GPP 38.300. Only when the RRC state of the second device UE is RRC idle (RRC_IDLE) can the USS configuration information be indicated via RRC signaling dedicated to the second device after the first device and the second device are connected. It is understood that each second device has a unique corresponding RRC signaling.

[0091] Specifically, the additional configuration information of the CSS includes: COREST configuration, transmission period T, period offset value offset slot and the maximum number of retransmissions.

[0092] The CORESET includes information such as the frequency band occupied by the PDCCH in the frequency domain and the number of Orthogonal Frequency Division Multiplexing (OFDM) symbols occupied in the time domain.

[0093] The length of the transmission period T can be expressed as the number of radio frames (T=10ms), or subframes (T=1ms), or time slots (T=125ns). For example, a transmission period T can be 32 time slots, i.e., T=1us (microseconds).

[0094] The periodic offset value offsetslot requires network configuration or protocol agreement by relevant technical personnel. If the periodic offset value offsetslot is not configured in the network, it defaults to 0.

[0095] S212: The network device determines the actual time domain position of the initially transmitted USS PDCCH.

[0096] Similar to the above step S202, if the transmission period T of the additional configuration information in step S211 is in units of time slots, then it is necessary to determine whether the starting time slot in the transmission period satisfies the following formula (1): (2 μ 10n f +n s )modT=Offset slot (1)

[0097] Among them, μ is the subcarrier spacing parameter, n f is the system frame number, n s is the time slot number in the wireless frame, T is the transmission period, offset slot is the period offset value.

[0098] If the starting time slot in the transmission period T satisfies the above formula (1), the time window determined by the starting time slot and the duration T is determined as the transmission period of the PDCCH of the USS. Subsequently, within the transmission period of the PDCCH of the USS, the actual time domain position of the PDCCH of the USS is determined, i.e., the initial transmission time domain position and / or the available retransmission time domain position.

[0099] In some specific implementations, the method for determining the initial transmission time domain position of the PDCCH of the USS is: within the transmission period of the PDCCH of the USS, the first transmission opportunity is used as the initial transmission time domain position of the PDCCH of the USS.

[0100] In some specific implementations, the method for determining the available retransmission time domain position of the PDCCH of the USS is as follows: first, according to the CORESET configuration information corresponding to the USS, the retransmission time domain position set of the PDCCH of the retransmitted USS is determined; then, the time domain position after the initial transmission time domain position in the retransmission time domain position set is determined as the available retransmission time domain position of the PDCCH of the USS.

[0101] It should be noted that the above embodiment is described based on the transmission period T in slots. If the transmission period T of the retransmission information in step S211 is in radio frames or subframes, it is similar to the above formula and will not be repeated here.

[0102] S213: The network device sends the USS PDCCH for the first time at the time domain position of the initial USS PDCCH transmission.

[0103] After determining the actual time domain position of the initially transmitted USS PDCCH, the first device may initially send the USS PDCCH at the actual time domain position.

[0104] S214: The network device determines a retransmission time domain position for retransmitting the USS PDCCH.

[0105] The retransmission time domain position refers to the time domain position other than the actual time domain position of the initial USS PDCCH (i.e., the initial transmission PMO) in the PMO set converted by the COREST configuration in step S211. After determining the actual time domain position of the initial USS PDCCH in step S212, the PMO other than the initial transmission PMO in each transmission period T is used as the retransmission PMO set, that is, the time domain position after the initial transmission time domain position is determined as the retransmission time domain position of the retransmission USS PDCCH. Thus, the CSS PDCCH is repeatedly sent at the retransmission time domain position until the maximum number of retransmissions indicated in the additional configuration information is reached.

[0106] S215: The network device repeatedly sends the USS PDCCH at the retransmission time domain position.

[0107] In summary, this application discloses a communication method, which is applied to an electronic device and includes: indicating configuration information of a target search space (SS) physical downlink control channel (PDCCH), the configuration information including a maximum number of retransmissions; determining a retransmission time domain location for the SS PDCCH; and repeatedly transmitting the SS PDCCH at the retransmission time domain location until the maximum number of retransmissions is reached. Thus, by repeatedly transmitting the SS PDCCH at the determined retransmission time domain location until the maximum number of retransmissions is reached, corresponding transmission performance requirements can be met, wireless communication losses can be reduced, downlink coverage can be enhanced, and communication quality can be improved.

[0108] See Figure 3, which is a schematic diagram of another communication method provided in an embodiment of the present application. The communication method can be executed by a terminal device in a communication system, such as a mobile phone, computer, etc. The method includes the following steps:

[0109] S301: The terminal device receives configuration information of a target search space SS physical downlink control channel PDCCH, where the configuration information includes a maximum number of retransmissions.

[0110] It can be understood that the SS PDCCH here includes CSS PDCCH and USS PDCCH.

[0111] S302: The terminal device determines whether the signal quality of the SS PDCCH is less than or equal to the quality threshold, and if so, executes S303. If not, executes S304.

[0112] It can be understood that the quality threshold is the threshold value for judging whether the signal quality meets the requirements. It is the threshold value configured in advance by the terminal device through the protocol. This application does not limit the specific size of the quality threshold.

[0113] In some specific implementations, signal quality metrics include Synchronization Signals Reference Signal Received Power (SS-RSRP) and Synchronization Signals Reference Signal Received Quality (SS-RSRQ). RSRP is used to assess the signal strength between a terminal device and network equipment such as a base station. A higher RSRP value indicates a stronger received signal, and is measured in dBm (decibel milliwatts). RSRQ measures the quality of the received reference signal. A higher RSRP value indicates better received signal quality, and is measured in dB (decibels).

[0114] S303: The terminal device repeatedly receives the SS PDCCH and performs combined detection.

[0115] Repeated reception of the SS PDCCH is only necessary when the signal quality of the SS PDCCH is less than or equal to a preset quality threshold. Therefore, by repeatedly receiving the SS PDCCH at the determined retransmission time domain position until the maximum number of retransmissions is reached, the corresponding transmission performance requirements can be met, wireless communication losses can be reduced, downlink coverage can be enhanced, and communication quality can be improved.

[0116] S304: The terminal device only receives the initially transmitted SS PDCCH.

[0117] If the signal quality of the SS PDCCH is higher than a preset quality threshold, only the initially transmitted SS PDCCH may be accepted.

[0118] It should be noted that the above S302 and S304 are optional steps of the embodiment of the present application, and the communication method of the embodiment of the present application may not execute the above S302 and S304.

[0119] In summary, this application discloses a communication method applicable to electronic devices such as mobile phones and computers. The method comprises: receiving configuration information for a target search space (SS) physical downlink control channel (PDCCH), the configuration information including a maximum number of retransmissions; and repeatedly receiving the SS PDCCH at a retransmission time domain location until the maximum number of retransmissions is reached. Thus, by repeatedly receiving the SS PDCCH at a determined retransmission time domain location until the maximum number of retransmissions is reached, corresponding transmission performance requirements can be met, wireless communication losses can be reduced, downlink coverage can be enhanced, and communication quality can be improved.

[0120] Based on the aforementioned communication method, the present application also provides an electronic device for executing the aforementioned communication method, which will be described below in conjunction with embodiments.

[0121] Refer to Figure 4, which is a schematic diagram of the hardware composition of an electronic device provided in an embodiment of the present application. The electronic device can be a first device, including but not limited to a base station and a core network unit. Figure 4 shows a simplified schematic diagram of the base station structure. The base station includes parts 410, 420, and 430. Part 410 is mainly used for baseband processing, controlling the base station, etc.; Part 410 is usually the control center of the base station, which can usually be called a processor, which is used to control the base station to perform the processing operations on the first device side in the above method embodiment. Part 420 is mainly used to store computer program code and data. Part 430 is mainly used for receiving and transmitting radio frequency signals and converting radio frequency signals into baseband signals; Part 430 can usually be called a transceiver module, a transceiver, a transceiver circuit, or a transceiver, etc. The transceiver module of part 430 can also be called a transceiver or a transceiver, etc., which includes an antenna 433 and a radio frequency circuit (not shown in the figure), wherein the radio frequency circuit is mainly used for radio frequency processing. Alternatively, the device for implementing the receiving function in section 430 may be considered a receiver, and the device for implementing the transmitting function may be considered a transmitter, that is, section 430 includes receiver 432 and transmitter 431. The receiver may also be referred to as a receiving module, receiver, or receiving circuit, and the transmitter may be referred to as a transmitting module, transmitter, or transmitting circuit, etc.

[0122] Sections 410 and 420 may include one or more boards, each of which may include one or more processors and one or more memories. The processor is used to read and execute programs in the memory to implement baseband processing functions and control the base station. If multiple boards are present, the boards may be interconnected to enhance processing capabilities. As an optional implementation, multiple boards may share one or more processors, multiple boards may share one or more memories, or multiple boards may simultaneously share one or more processors.

[0123] For example, in one implementation, the transceiver module in section 430 is used to execute the transceiver-related processes executed by the base station (first device) in the aforementioned method embodiment. The processor in section 410 is used to execute the processing-related processes executed by the base station in the aforementioned method embodiment.

[0124] It should be understood that FIG4 is merely an example and not a limitation, and the network device including the processor, memory, and transceiver may not rely on the structure shown in FIG4 .

[0125] Referring to Figure 5, this figure is a schematic diagram of the hardware composition of another electronic device provided in an embodiment of the present application. The electronic device can be a second device, and the second device can be a terminal, including but not limited to electronic devices such as mobile phones and smart wearable devices (such as smart watches). Taking a mobile phone as an example, the electronic device may include a processor 510, an external memory interface 520, an internal memory 521, an antenna 1, an antenna 2, a mobile communication module 530, and a wireless communication module 540, etc.

[0126] It should be understood that the structure illustrated in this embodiment does not constitute a specific limitation on the electronic device. In other embodiments, the electronic device may include more or fewer components than shown, or some components may be combined or separated, or the components may be arranged differently. The components shown in the figure may be implemented in hardware, software, or a combination of software and hardware.

[0127] The processor 510 may include one or more processing units. For example, the processor 510 may include an application processor (AP), a modem processor, a graphics processing unit (GPU), an image signal processor (ISP), a controller, a video codec, a digital signal processor (DSP), a baseband processor, and / or a neural-network processing unit (NPU). Different processing units may be independent devices or integrated into one or more processors.

[0128] It is understood that the interface connection relationship between the modules illustrated in this embodiment is only a schematic illustration and does not constitute a structural limitation of the electronic device. In other embodiments of the present application, the electronic device may also adopt different interface connection methods in the above embodiments, or a combination of multiple interface connection methods.

[0129] The external memory interface 520 can be used to connect an external memory card, such as a Micro SD card, to expand the storage capacity of the electronic device. The external memory card communicates with the processor 510 via the external memory interface 520 to implement data storage functions. For example, files such as music and videos can be stored on the external memory card.

[0130] The internal memory 521 can be used to store computer executable program code, and the executable program code includes instructions. The processor 510 executes various functional applications and data processing of the electronic device by running the instructions stored in the internal memory 521. The internal memory 521 may include a program storage area and a data storage area. Among them, the program storage area can store an operating system, an application required for at least one function (such as a sound playback function, an image playback function, etc.), etc. The data storage area can store data created during the use of the electronic device (such as audio data, a phone book, etc.), etc. In addition, the internal memory 521 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, a universal flash storage (UFS), etc. The processor 510 executes various functional applications and data processing of the electronic device by running the instructions stored in the internal memory 521, and / or the instructions stored in the memory provided in the processor.

[0131] The wireless communication function of the electronic device can be implemented through antenna 1, antenna 2, mobile communication module 530, wireless communication module 540, modem processor and baseband processor.

[0132] Antenna 1 and Antenna 2 are used to transmit and receive electromagnetic wave signals. Each antenna in an electronic device can be used to cover a single or multiple communication frequency bands. Different antennas can also be reused to improve antenna utilization. For example, antenna 1 can be reused as a diversity antenna for a wireless local area network. In other embodiments, the antennas can be used in conjunction with a tuning switch.

[0133] The mobile communication module 530 can provide solutions for wireless communications including 2G / 3G / 4G / 5G applied to electronic devices. The mobile communication module 530 may include at least one filter, a switch, a power amplifier, a low noise amplifier (LNA), etc. The mobile communication module 530 can receive electromagnetic waves from the antenna 1, and filter, amplify, and process the received electromagnetic waves, and transmit them to the modulation and demodulation processor for demodulation. The mobile communication module 530 can also amplify the signal modulated by the modulation and demodulation processor, and convert it into electromagnetic waves for radiation through the antenna 1. In some embodiments, at least some of the functional modules of the mobile communication module 530 can be set in the processor 510. In some embodiments, at least some of the functional modules of the mobile communication module 530 can be set in the same device as at least some of the modules of the processor 510.

[0134] In some embodiments, the electronic device initiates or receives a call request through the mobile communication module 530 and the antenna 1 .

[0135] Furthermore, an operating system runs on the aforementioned components, such as the iOS operating system, the Android operating system, and the Windows operating system. Application programs can be installed and run on the operating system. Those skilled in the art will clearly understand that, for ease of description and brevity, the explanation and beneficial effects of any of the aforementioned electronic devices can be referred to the corresponding method embodiments provided above, and will not be further elaborated here.

[0136] The present application also provides a communication system, which may include a first device as shown in FIG4 (for example, a network device such as a base station) and a second device as shown in FIG5 (for example, a terminal such as a mobile phone).

[0137] In this application, a terminal or network device may include a hardware layer, an operating system layer running on the hardware layer, and an application layer running on the operating system layer. The hardware layer may include hardware such as a central processing unit (CPU), a memory management unit (MMU), and memory (also known as main memory). The operating system of the operating system layer may be any one or more computer operating systems that implement business processing through processes, such as the Linux operating system, Unix operating system, Android operating system, iOS operating system, or Windows operating system. The application layer may include applications such as browsers, address books, word processing software, and instant messaging software.

[0138] 6 , which is a schematic diagram of a communication device provided in an embodiment of the present application, wherein the communication device 600 is applied to an electronic device such as a base station, and includes an information indication module 601 , a location determination module 602 , and a retransmission module 603 .

[0139] The information indication module 601 is used to indicate the configuration information of the target search space SS physical downlink control channel PDCCH, and the configuration information includes the maximum number of retransmissions;

[0140] The position determination module 602 is configured to determine the retransmission time domain position of the SS PDCCH;

[0141] The retransmission module 603 is configured to retransmit the SS PDCCH at the retransmission time domain position until the maximum number of retransmission times is reached.

[0142] In summary, the present application discloses a communication device that can meet corresponding transmission performance requirements, reduce wireless communication losses, enhance downlink coverage, and improve communication quality by repeatedly sending SS PDCCH multiple times at a determined retransmission time domain position until the maximum number of retransmissions is reached.

[0143] 7 , which is a schematic diagram of another communication device provided in an embodiment of the present application. The communication device 700 is applied to electronic devices such as mobile phones and computers, and includes: an information receiving module 701 and a repeated receiving module 702 .

[0144] The information receiving module 701 is configured to receive configuration information of a target search space SS physical downlink control channel PDCCH, the configuration information including the maximum number of retransmissions;

[0145] The repeated receiving module 702 is configured to repeatedly receive the SS PDCCH at the retransmission time domain position until the maximum number of retransmission times is reached.

[0146] In summary, the present application discloses a communication device that can meet corresponding transmission performance requirements, reduce wireless communication losses, enhance downlink coverage, and improve communication quality by repeatedly receiving SS PDCCH multiple times at a determined retransmission time domain position until the maximum number of retransmissions is reached.

[0147] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and apparatuses described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0148] As described above, the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the above embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the above embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A communication method, characterized in that, Applied to a network device, the method includes: Indicating configuration information of a physical downlink control channel (PDCCH) of a target search space (SS), where the configuration information includes maximum retransmission times information; Determining available retransmission time domain positions of the PDCCH of the SS; At the available retransmission time domain positions, repeatedly transmitting the PDCCH of the SS according to the maximum retransmission times information.

2. The method according to claim 1, characterized in that, The configuration information further includes initial transmission configuration information and / or transmission period information.

3. The method according to claim 2, wherein The length of the transmission period is the sum of a target number of time slots; a method for determining the transmission time domain position of the PDCCH of the SS includes: Judging whether a starting time slot in the transmission period satisfies the following formula, (2 μ × 10n f + n s ) mod T = Offset slot where μ is the subcarrier spacing parameter, n f is the system frame number, n s is the slot number within the radio frame, T is the transmission period, and offset slot is the cycle offset value; If it is satisfied, determining a time window determined by the starting time slot and a duration T as the transmission period of the PDCCH of the SS; Within the transmission period of the PDCCH of the SS, determining the initial transmission time domain position and / or available retransmission time domain positions of the PDCCH of the SS.

4. The method according to claim 3, characterized in that, The determining the initial transmission time domain position of the PDCCH of the SS within the transmission period of the PDCCH of the SS includes: Within the transmission period of the PDCCH of the SS, taking the first transmission occasion as the initial transmission time domain position of the PDCCH of the SS.

5. The method according to claim 4, characterized in that, When the target SS is a common search space (CSS), the determining the available retransmission time domain positions of the PDCCH of the SS includes: Determining a set of retransmission time domain positions for retransmitting the PDCCH of the CSS; Within the transmission period of the PDCCH of the CSS, determining, among the set of retransmission time domain positions, the time domain positions after the initial transmission time domain position as the available retransmission time domain positions of the PDCCH of the CSS.

6. The method according to claim 5, characterized in that, The indicating the configuration information of the physical downlink control channel (PDCCH) of the target search space (SS) includes: Indicating the configuration information of the PDCCH of the CSS through a first system information block (SIB1) signaling or a radio resource control (RRC) signaling.

7. The method according to claim 5, wherein The repeatedly transmitting the PDCCH of the SS at the available retransmission time domain positions according to the maximum retransmission times information includes: Determining an initial transmission PDCCH candidate set for initially transmitting the PDCCH of the CSS; At the available retransmission time domain positions, repeatedly transmitting the PDCCH of the CSS according to the maximum retransmission times information and a retransmission PDCCH candidate set, where the retransmission PDCCH candidate set corresponds to the initial transmission PDCCH candidate set.

8. The method according to claim 5, characterized in that, The repeatedly transmitting the PDCCH of the SS at the available retransmission time domain positions according to the maximum retransmission times information includes: Determining an initial transmission SS for initially transmitting the PDCCH of the CSS; At the retransmission time domain positions, repeatedly transmitting the PDCCH of the CSS according to the maximum retransmission times information and a retransmission SS, where the PDCCH candidate set of the retransmission SS is the same as the PDCCH candidate set of the initial transmission SS.

9. The method according to claim 2, wherein The configuration information further includes frequency domain resource control resource set (CORESET) configuration information.

10. The method according to claim 4, characterized in that When the target SS is a dedicated search space (USS), the determining the available retransmission time domain positions of the PDCCH of the SS includes: Determine a set of retransmission time domain positions for the PDCCH retransmitting the USS according to the CORESET configuration information corresponding to the USS; Determine the available retransmission time domain positions for the PDCCH of the USS as the time domain positions after the initial transmission time domain position in the set of retransmission time domain positions.

11. The method according to claim 10, wherein The configuration information indicating the physical downlink control channel (PDCCH) of the target search space (SS) includes: Indicate the configuration information of the PDCCH of the USS through RRC signaling.

12. A communication method, characterized in that, Applied to a terminal device, the method includes: Receive the configuration information of the physical downlink control channel (PDCCH) of the target search space (SS), where the configuration information includes maximum retransmission times information; Determine the available retransmission time domain positions for the PDCCH of the SS; At the available retransmission time domain positions, repeat receiving the PDCCH of the SS according to the maximum retransmission times information.

13. The method according to claim 12, wherein The repeating to receive the PDCCH of the SS according to the maximum retransmission times information includes: If the signal quality of the PDCCH of the SS is less than or equal to a quality threshold, repeat receiving the PDCCH of the SS according to the maximum retransmission times information.

14. The method according to claim 12, wherein The configuration information further includes initial transmission configuration information and / or transmission period information.

15. The method according to claim 14, wherein The length of the transmission period is the sum of a target number of time slots; the method for determining the transmission time domain position of the PDCCH of the SS includes: Determine whether the starting time slot in the transmission period satisfies the following formula, (2 μ × 10n f + n s ) mod T = Offset slot where μ is the subcarrier spacing parameter, n f is the system frame number, n s is the slot number within the radio frame, T is the transmission period, offset slot is the cycle offset value; If it is satisfied, determine the time window determined by the starting time slot and the duration T as the transmission period of the PDCCH of the SS; Within the transmission period of the PDCCH of the SS, determine the initial transmission time domain position and / or available retransmission time domain positions of the PDCCH of the SS.

16. The method according to claim 3, wherein The determining the initial transmission time domain position of the PDCCH of the SS within the transmission period of the PDCCH of the SS includes: Within the transmission period of the PDCCH of the SS, use the first transmission occasion as the initial transmission time domain position of the PDCCH of the SS.

17. The method according to claim 16, wherein When the target SS is a common search space (CSS), the determining the available retransmission time domain positions for the PDCCH of the SS includes: Determine a set of retransmission time domain positions for the PDCCH retransmitting the CSS; Within the transmission period of the PDCCH of the CSS, determine the available retransmission time domain positions for the PDCCH of the CSS as the time domain positions after the initial transmission time domain position in the set of retransmission time domain positions.

18. The method according to claim 17, wherein The receiving the configuration information of the physical downlink control channel (PDCCH) of the target search space (SS) includes: Receive the configuration information of the PDCCH of the CSS through the first system information block (SIB1) signaling or radio resource control (RRC) signaling.

19. The method according to claim 17, wherein The repeating to receive the PDCCH of the SS at the available retransmission time domain positions according to the maximum retransmission times information includes: Determine the initial transmission PDCCH candidate set for the PDCCH of the CSS; At the available retransmission time domain position, according to the maximum retransmission times information and the retransmission PDCCH candidate set, repeatedly receive the PDCCH of the CSS, where the retransmission PDCCH candidate set corresponds to the initial transmission PDCCH candidate set.

20. The method according to claim 17, wherein The repeatedly receiving the PDCCH of the SS according to the maximum retransmission times information at the available retransmission time domain position includes: Determine the initial transmission SS of the PDCCH of the initial transmission CSS; At the retransmission time domain position, according to the maximum retransmission times information and the retransmission SS, repeatedly receive the PDCCH of the CSS, where the PDCCH candidate set of the retransmission SS is the same as the PDCCH candidate set of the initial transmission SS.

21. The method according to claim 14, characterized in that The configuration information further includes frequency domain resource CORESET configuration information.

22. The method according to claim 16, characterized in that, The target SS is a dedicated search space USS. The determining the available retransmission time domain position of the PDCCH of the SS includes: According to the CORESET configuration information corresponding to the USS, determine the set of retransmission time domain positions for retransmitting the PDCCH of the USS; Determine the time domain positions after the initial transmission time domain position in the set of retransmission time domain positions as the available retransmission time domain positions of the PDCCH of the USS.

23. The method according to claim 22, wherein The configuration information for transmitting the physical downlink control channel PDCCH of the target search space SS includes: Transmit the configuration information of the PDCCH of the USS through RRC signaling.

24. A network device, characterized in that, The network device includes: A memory for storing computer programs or computer instructions; A processor for executing the computer programs or computer instructions stored in the memory, so that the network device executes the method according to any one of claims 1 to 11.

25. A terminal device, characterized in that, The terminal device includes: A memory for storing computer programs or computer instructions; A processor for executing the computer programs or computer instructions stored in the memory, so that the terminal device executes the method according to any one of claims 12 to 23.

26. A communication system, characterized in that, The system includes a first device and a second device. The first device is used to execute the method according to any one of claims 1 to 11, and the second device is used to execute the method according to any one of claims 12 to 23.

27. A computer storage medium for storing a computer program, which when executed is used to implement the method according to any one of claims 1 to 23.

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