Covering method and device, storage medium and program product

Abstract

The embodiment of the invention provides a coverage method and device, a storage medium and a program product, relates to the technical field of communication, and solves the technical problem of poor coverage performance of network equipment. The method comprises the following steps: acquiring configuration parameters; the configuration parameter comprises a repeated transmission parameter of a downlink channel and / or a coverage enhancement parameter of a reference signal; and performing communication transmission based on the configuration parameters, and / or performing measurement.

Description

Technical Field

[0001] The present disclosure relates to the field of communication technology, and in particular to a coverage method, device, storage medium, and program product. Background Art

[0002] In the related art, after a terminal accesses a network device, the transmission power of the network device is limited, resulting in reduced downlink transmission performance. Therefore, how to improve the coverage performance of the network device has become a technical problem that needs to be solved urgently. Summary of the invention

[0003] The embodiments of the present disclosure provide a coverage method, device, storage medium and program product, which solve the technical problem of poor coverage performance of network equipment.

[0004] On the one hand, a coverage method is provided, comprising: acquiring configuration parameters; the configuration parameters comprising repetition transmission parameters of a downlink channel, and / or coverage enhancement parameters of a reference signal; performing communication transmission and / or measurement based on the configuration parameters.

[0005] On the other hand, a coverage device is provided, including: a communication unit and a processing unit, wherein the communication unit is used to obtain configuration parameters; the configuration parameters include repetition transmission parameters of a downlink channel and / or coverage enhancement parameters of a reference signal; the processing unit is used to perform communication transmission and / or measurement based on the configuration parameters.

[0006] On the other hand, a covering device is provided, comprising: a memory and a processor; the memory and the processor are coupled; the memory is used to store a computer program; and the processor implements the information processing method of any of the above embodiments when executing the computer program.

[0007] On the other hand, a computer-readable storage medium is provided, on which computer program instructions are stored. When the computer program instructions are executed by a processor, the information processing method of any of the above embodiments is implemented.

[0008] On the other hand, a computer program product is provided, which includes computer program instructions, and when the computer program instructions are executed by a processor, the information processing method of any of the above embodiments is implemented.

[0009] The embodiment of the present disclosure provides a coverage method, wherein a first node obtains a repetition transmission parameter of a downlink channel and / or a coverage enhancement parameter of a reference signal, and performs communication transmission and / or measurement based on the configuration parameters. In this way, the first node can enhance the downlink coverage of a network device based on the repetition transmission parameter of the downlink channel and / or the coverage enhancement parameter of the reference signal, thereby improving the downlink coverage capability of the network device. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 A schematic diagram of the system architecture of an NTN communication system provided in an embodiment of the present disclosure;

[0011] Figure 2 A schematic diagram of a system architecture of a communication system provided by an embodiment of the present disclosure;

[0012] Figure 3 A flowchart of a covering method provided by an embodiment of the present disclosure;

[0013] Figure 4 A schematic diagram of repeating a time domain resource of a delayed DMRS symbol of a PDSCH provided by an embodiment of the present disclosure;

[0014] Figure 5 A schematic diagram of canceling the repetition of the time domain resources of the DMRS symbol of the PDSCH provided in an embodiment of the present disclosure;

[0015] Figure 6 A schematic diagram of skipping the time domain resources of the DMRS symbols of the PDSCH for repeated transmission provided by an embodiment of the present disclosure;

[0016] Figure 7 A flowchart of another covering method provided in an embodiment of the present disclosure;

[0017] Figure 8 A schematic diagram of a newly added content indicating multiple SSB cycle parameters in each neighboring cell in SSB-MTC4 provided in an embodiment of the present disclosure;

[0018] Fig. 9 A schematic diagram of a downlink time domain resource provided by an embodiment of the present disclosure is a partial subframe at the end of a first system frame and a partial subframe at the head of a second system frame;

[0019] Fig.10 A schematic diagram of a transmission cycle configuration provided by an embodiment of the present disclosure;

[0020] Fig.11 A schematic diagram of another transmission cycle configuration provided by an embodiment of the present disclosure;

[0021] Fig.12 A schematic diagram of the structure of a covering device provided in an embodiment of the present disclosure;

[0022] Fig.13 A schematic diagram of the hardware structure of a covering device provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments in the embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the embodiments of the present disclosure.

[0024] It should be noted that, in the embodiments of the present disclosure, 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 the present disclosure should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

[0025] In the following, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features.

[0026] In the description of the embodiments of the present disclosure, unless otherwise specified, " / " means "or", for example, A / B can mean A or B. "And / or" in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, "at least one" means one or more, and "plurality" means two or more.

[0027] To facilitate understanding, the following first describes the related technologies involved in the embodiments of the present disclosure.

[0028] 1. Non-Terrestrial Network (NTN)

[0029] NTN is a technology that provides communication services to terminals through satellites or other non-ground platforms (such as high-altitude platforms, drones, etc.). The NTN communication system can be integrated with the 5G communication system to provide more comprehensive network coverage for terminals.

[0030] like Figure 1 As shown in FIG. 1 , it is a schematic diagram of the system architecture of the NTN communication system; wherein the NTN communication system includes a terminal, access network equipment (such as an NTN base station, a gateway station), and a satellite. Optionally, the link between the terminal and the satellite is a service link, and the link between the access network equipment and the satellite is a feeder link. All terminals (such as Figure 1The terminal 1 and the terminal x) shown in the figure can use a common link.

[0031] 2. Physical downlink control channel (PDCCH) search space (SS)

[0032] PDCCH SS is used to schedule the physical downlink shared channel (PDSCH). PDSCH scheduling is divided into public scheduling and user-specific scheduling, which are scheduled using PDCCH in different SSs. The network device configures SS for the terminal to indicate the timing of the terminal to detect PDCCH. As an example, the PDCCH search space in the current new radio (NR) specification is shown in Table 1 below.

[0033] Table 1. PDCCH search space in NR specification

[0034]

[0035]

[0036]

[0037] 3. NR NTN

[0038] NR NTN is an extension of the fifth generation mobile communication technology (5th Generation Mobile Communication Technology, 5G) NR technology, which is used to improve the coverage of 5G networks through NTN (such as satellite communication networks). In NR NTN, smtc4list is usually used to configure the neighboring cells that need to be measured, and establish the synchronization signal block measurement timing configuration (synchronization signal block measurement timing configuration, SMTC) (also called SSB-MTC or smtc) corresponding to each neighboring cell, where the offset is given by the configuration in smtc4list. However, the measurement period and duration of each synchronization signal block (synchronization signal block, SSB) in the cell are uniformly given by the smtc1 configuration. The measurement period of each SSB given by smtc1 is the same and cannot be configured separately.

[0039] The description of smtc4list and SMTC in the protocol is: If smtc4list is present, for cellsindicated in the pci-List parameter in each SSB-MTC4 element of the list in the same MeasObjectNR, the UE shall setup an additional SS / PBCH blockmeasurement timing configuration (SMTC) in accordance with the received offsetparameter in each SSB-MTC4 configuration and use the duration parameter and periodicity (derived from parameter periodicityAndOffset) from thesmtc1configuration.The first subframe of each SMTC occurs at an SFNand subframe of the NR SpCell meeting the above condition. (If smtc4list exists in MeasObjectNR, then for the cells indicated in the pci-List parameter in each SSB-MTC4 element in smtc4list, the UE shall set the additional SS / PBCH block measurement time configuration (SMTC) according to the reception offset parameter in the corresponding SSB-MTC4 configuration, and use the duration parameter and period parameter in the smtc1 configuration (which can be derived from the parameter periodicitvAndOffset). The first subframe of each SMTC opportunity occurs in the SFN and subframe where the corresponding NR SpCell meets the above conditions).

[0040] The above is a detailed description of the related technologies involved in the embodiments of the present disclosure.

[0041] According to the above content, it can be known that in the related technology, 5G network (or future communication network) connection can be carried out through non-ground equipment such as satellites (or aircraft). However, due to satellite payload limitations (for example, satellite transmission power is usually limited), there is a gain difference between the nadir beam (the beam pointing directly below the ground) and the edge beam (the beam pointing to the edge of the coverage area), and the signal quality of the edge beam is poor. Therefore, in order to improve the downlink performance, downlink coverage enhancement is required. In addition, the current wireless system has a higher frequency, resulting in worse signal propagation conditions and poor downlink coverage performance, which also requires downlink coverage enhancement.

[0042] To solve the above technical problems, the present disclosure provides a communication system 20, such as Figure 2 As shown, the communication system 20 includes: a first node 201 and a second node 202. The second node 202 is used to provide a downlink signal to perform downlink coverage. The first node 201 is used to obtain configuration parameters and perform downlink coverage enhancement based on the configuration parameters.

[0043] In some embodiments, the configuration parameter includes a repetition transmission parameter of a downlink channel. After the first node 201 obtains the repetition transmission parameter of the downlink channel, it receives a downlink signal based on the repetition parameter of the downlink channel, thereby enhancing the downlink signal.

[0044] In some other embodiments, the configuration parameters include coverage enhancement parameters of the reference signal. After acquiring the coverage enhancement parameters of the reference signal, the first node 201 measures the reference signal based on the coverage enhancement parameters of the reference signal, thereby improving the measurement effect of the reference signal and further enhancing the downlink coverage.

[0045] The coverage method provided by the embodiments of the present disclosure can be applied to systems of various communication formats. For example, the systems to which the coverage method provided by the embodiments of the present disclosure can be applied include, but are not limited to, long term evolution (LTE) systems, various versions based on LTE evolution, fifth generation mobile communication technology (5G) systems, future mobile communication networks (such as future mobile communication networks), or multiple communication convergence systems. In addition, the coverage method provided by the embodiments of the present disclosure can also be applied to future-oriented communication systems, etc.

[0046] For example, in combination with the above Figure 2The first node 201 may be a terminal, such as an IoT device, a mobile phone, a vehicle-mounted device, etc. The second node 202 may be a base station or a master terminal in a direct communication (device-to-device or sidelink communication) scenario, such as a communication base station, a sensing base station, or a non-ground device, such as a satellite, an aerial platform, a drone, etc.

[0047] In some embodiments, the terminal may be a device with wireless transceiver function, which may be deployed on land, including indoors or outdoors, handheld, wearable or vehicle-mounted; it may also be deployed on the water surface (such as ships, etc.); it may also be deployed in the air (such as airplanes, balloons and satellites, etc.). The terminal may 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 embodiments of the present disclosure do not limit the application scenarios. A terminal may sometimes also be referred to as a user, user equipment (UE), access terminal, UE unit, UE station, mobile station, mobile station, remote station, remote terminal, mobile device, UE terminal, wireless communication equipment, UE agent or UE device, etc., but the embodiments of the present disclosure are not limited to this.

[0048] In some embodiments, the base station can be a base station or an evolved base station (eNB or eNodeB) in long term evolution (LTE), long term evolution advanced (LTEA), a base station device in a 5G network, or a base station in a future communication system, etc. The base station may include various macro base stations, micro base stations, home base stations, wireless remote stations, reconfigurable intelligent surfaces (RISs), routers, wireless fidelity (WIFI) devices, or various network side devices such as primary cells and collaborative cells (secondary cells).

[0049] The present disclosure also provides a covering method, which can be applied to Figure 2 In the communication system shown in FIG. Figure 3 , the covering method provided by the embodiment of the present disclosure is described in detail. The covering method can be applied to Figure 2 The first node in the communication system shown in FIG. 1 is used to obtain configuration parameters and perform coverage enhancement based on the obtained configuration parameters. Figure 3 As shown, the coverage method includes:

[0050] Step 301: The first node obtains configuration parameters.

[0051] The configuration parameters include repetition transmission parameters of the downlink channel and / or coverage enhancement parameters of the reference signal.

[0052] In some embodiments, the configuration parameter may be a predefined configuration parameter. For example, the specific content of the configuration parameter is defined in a relevant protocol or specification. If the terminal supports the protocol or specification, the terminal may determine the configuration parameter based on the protocol or specification.

[0053] In some other embodiments, the configuration parameter may be a configuration parameter indicated by the second node (or other node) to the first node. As an example, the second node sends configuration parameter indication information to the first node to indicate a repetition transmission parameter of a downlink channel and / or a coverage enhancement parameter of a reference signal.

[0054] It should be pointed out that the first node may also obtain configuration parameters in other ways, which is not limited in the present disclosure.

[0055] Step 302: The first node performs communication transmission and / or measurement based on the configuration parameters.

[0056] In some embodiments, when the configuration parameters include repetition transmission parameters of a downlink channel, after the first node acquires the repetition transmission parameters of the downlink channel, it receives a downlink signal based on the repetition parameters of the downlink channel, thereby enhancing the downlink signal.

[0057] In some further embodiments, when the configuration parameters include coverage enhancement parameters of the reference signal, after the first node obtains the coverage enhancement parameters of the reference signal, it measures the reference signal based on the coverage enhancement parameters of the reference signal, thereby improving the measurement effect of the reference signal and further achieving enhanced downlink coverage.

[0058] In some further embodiments, when the configuration parameters include coverage enhancement parameters of time division duplexing (TDD), after the first node obtains the coverage enhancement parameters of time division duplexing, it receives downlink transmission data based on the coverage enhancement parameters of time division duplexing, thereby improving the transmission quality of the downlink transmission and further achieving enhanced downlink coverage.

[0059] The embodiment of the present disclosure also provides a coverage method, wherein the first node obtains configuration parameters; the configuration parameters include repetition transmission parameters of a downlink channel and / or coverage enhancement parameters of a reference signal; communication transmission and / or measurement are performed based on the configuration parameters. In this way, the first node can perform downlink coverage enhancement based on the repetition transmission parameters of the downlink channel and / or the coverage enhancement parameters of the reference signal, thereby improving the downlink coverage capability.

[0060] In the disclosed embodiment, the configuration parameters include repetition transmission parameters of the downlink channel and / or coverage enhancement parameters of the reference signal. The following describes in detail the repetition transmission parameters of the downlink channel (recorded as scenario 1), the coverage enhancement parameters of the reference signal (recorded as scenario 2), and the coverage enhancement parameters of TDD (recorded as scenario 3).

[0061] Scenario 1: Downlink channel retransmission parameters

[0062] The repetitive transmission parameters of the downlink channel are usually applicable to link-level coverage enhancement. For example, in the NTN scenario, since the link budget is limited by the satellite transmission power and propagation path loss, link-level enhancement of the downlink channel is an effective way to improve coverage. Link-level enhancement can achieve the effect of increasing the link budget margin by using repeated transmissions through time domain energy accumulation.

[0063] In the embodiment of the present application, the terminal obtains configuration parameters to determine the repeated transmission of the downlink channel, such as determining whether the downlink channel is repeatedly transmitted, the number of repeated transmissions of the downlink channel, the transmission resources of the repeated transmission of the downlink channel, etc. After the terminal obtains the parameters of whether the downlink channel is repeatedly transmitted, the number of repeated transmissions of the downlink channel, and the transmission resources of the repeated transmission of the downlink channel, the terminal monitors the downlink channel of repeated transmission based on these parameters, thereby improving the link performance of the downlink channel, and further improving the coverage capability of the downlink channel.

[0064] In some embodiments, the downlink channel includes a downlink control channel and / or a downlink data channel. As an example, the downlink control channel is a PDCCH, and the downlink data channel is a PDSCH.

[0065] The following describes in detail the repetition transmission parameters of the downlink control channel (referred to as scenario 1.1) and the repetition transmission parameters of the downlink data channel (referred to as scenario 1.2).

[0066] Scenario 1.1: Downlink control channel retransmission parameters

[0067] Combined with the above description of the PDCCH search space in the related art, it can be known that in the current downlink transmission process, when scheduling PDSCH, it is necessary to use different search spaces to schedule PDSCH according to PDCCH. Therefore, in order to ensure the downlink coverage performance, the coverage capability of PDCCH needs to meet the requirements. At this time, the downlink control channel (such as PDCCH) can be repeatedly transmitted to enhance the coverage capability of PDCCH. When repeatedly transmitting the downlink control channel, the repetition transmission parameters of the downlink control channel include at least one of the following: whether to repeatedly transmit the downlink control channel, the number of repeated transmissions of the downlink control channel, and the transmission resources used for repeated transmission of the downlink control channel.

[0068] As an implementation manner, the repetition transmission parameter of the downlink control channel is determined based on at least one of the following:

[0069] a) Predefine the repetitive transmission parameters of the downlink control channel corresponding to different types of networks.

[0070] Or, b) determining the repetition transmission parameter of the downlink control channel based on the first indication information of the second node.

[0071] With respect to the above a), predefining repetitive transmission parameters of downlink control channels corresponding to different types of networks includes at least one of the following:

[0072] A downlink control channel is predefined for repeated transmission in a specific network scenario.

[0073] Predefine the number of repetitions of the downlink control channel in a specific network scenario.

[0074] Predefine the transmission resources for repeated transmission of downlink control channels in specific network scenarios.

[0075] In other words, in the embodiments of the present disclosure, the repetition transmission parameters of the downlink control channel in various network scenarios may be defined in the relevant protocols or specifications. For example, whether to repetitively transmit the downlink control channel, the number of repetitive transmissions of the downlink control channel, and the transmission resources used for repetitive transmission of the downlink control channel may be defined in the communication protocol.

[0076] Optionally, the above-mentioned specific network scenario is an NTN network scenario or a TN high-frequency network scenario.

[0077] As an example, for Type0-PDCCH CSS (a common search space configuration used to transmit control information, especially control information related to system information (SI)), Type0-PDCCH CSS is repeatedly sent N times in the NTN scenario, and its repeated time-frequency resources can be predefined as the same time-frequency resources in N consecutive time slots (slots), where N is a positive integer. Exemplarily, when Type0-PDCCH CSS is repeatedly sent twice, time domain energy accumulation of about 3dB can be achieved. Optionally, the first node can determine whether it is in the NTN scenario based on conditions such as frequency band, terminal type, network type, and / or geographical location.

[0078] In some embodiments, the transmission resources for repeatedly transmitting the downlink control channel include N common search spaces (CSS), and the N CSSs are the same time-frequency resources in N consecutive time slots. In other words, the transmission resources for repeatedly transmitting the downlink control channel can be the same time-frequency resources in N consecutive time slots.

[0079] In some further embodiments, the transmission resources used for repeatedly transmitting the downlink control channel include a symbol set of N consecutive CORESET lengths.

[0080] It should be noted that if the symbol sets of N consecutive CORESET lengths overlap with the time-frequency resources of other signals (for example, DMRS symbols of PDSCH), the following method can also be used to determine the transmission resources for repeatedly transmitting the downlink control channel:

[0081] The DMRS symbol of PDSCH is delayed to the time domain resource after the symbol set of N consecutive CORESET lengths. Figure 4 As shown, it is a schematic diagram of repeating the time domain resources of a delayed PDSCH DMRS symbol provided by an embodiment of the present disclosure; taking N=2 as an example, the DMRS symbol of the PDSCH is delayed from the original OFDM symbol #2 to OFDM symbol #4 to avoid the above-mentioned continuous 2 CORESET length symbol set. The continuous 2 CORESET length symbol set for repeated transmission of the downlink control channel occupies OFDM symbols #0 to #3.

[0082] Alternatively, the DMRS symbol of the PDSCH is discarded, cancelled or not transmitted. Figure 5As shown, a schematic diagram of canceling the repetition of the time domain resources of the DMRS symbol of the PDSCH provided by the embodiment of the present disclosure; taking N=2 as an example, the DMRS symbol of the PDSCH is not transmitted to avoid the above-mentioned continuous 2 CORESET length symbol set. The continuous 2 CORESET length symbol set for repeated transmission of the downlink control channel occupies OFDM symbols #0 to #3.

[0083] In some further embodiments, the transmission resources used for repeatedly transmitting the downlink control channel include N consecutive available symbol sets of CORESET length.

[0084] In some other embodiments, the transmission resources used for repeatedly transmitting the downlink control channel include N consecutive available symbol sets of length X (X may be any number), or the same time domain resources on N consecutive available symbol sets of length X.

[0085] In some other embodiments, the transmission resources used for repeated transmission of the downlink control channel include N time domain resources at intervals, and the interval or offset between two adjacent time domain resources used for repeated transmission is X symbols or time slots or subframes or milliseconds. The interval or offset may refer to the start time offset of two adjacent time domain resources used for repeated transmission, or the offset between the end time of the previous time domain resource and the start time of the next time domain resource, and X may be any positive integer.

[0086] In some further embodiments, the transmission resources used for repeatedly transmitting the downlink control channel include N spaced time domain resources, and the interval / offset between two adjacent time domain resources is X symbols or time slots or subframes or milliseconds, where X can be any positive integer.

[0087] In some embodiments, when a downlink control channel is transmitted or repeatedly transmitted through multiple time domain resources, the timing relationship or scheduling timing is based on the first time domain resource or repeated transmission. In some other embodiments, when a downlink control channel is transmitted or repeatedly transmitted through multiple time domain resources, the timing relationship or scheduling timing is based on the last time domain resource or repeated transmission. In some other embodiments, when a downlink control channel is transmitted or repeatedly transmitted through multiple time domain resources, each time domain resource or repeated transmission schedules a data transmission.

[0088] As an example, in the embodiment of the present disclosure, the time-frequency resources that do not overlap with the time-frequency resources of other signals (for example, DMRS symbols of PDSCH) are available time-frequency resources. When there is an overlap with the time-frequency resources of other signals, the time-frequency resources of other signals are skipped. Figure 6As shown, it is a schematic diagram of skipping the time domain resource of the DMRS symbol of PDSCH for repetition provided by an embodiment of the present disclosure; taking N=2 as an example, the DMRS symbol of PDSCH includes OFDM symbol #2. At this time, the second available CORESET length symbol set of two consecutive available CORESET length symbol sets starts from OFDM symbol #3 to avoid the DMRS symbol of PDSCH (i.e., OFDM symbol #2).

[0089] It should be pointed out that the same time-frequency resources in multiple time slots in the embodiments of the present disclosure may be transmission resources with the same time-domain symbol resources and frequency-domain resources in one time slot.

[0090] In the case of b) determining the repetition transmission parameter of the downlink control channel based on the first indication information of the second node, the second node determines the repetition transmission parameter of the downlink control channel of the first node, and generates the first indication information and sends it to the first node. After receiving the first indication information, the first node determines the repetition transmission parameter of the downlink control channel based on the first indication information.

[0091] In some embodiments, the first indication information is carried in a downlink signaling message sent before the downlink control channel. Optionally, the downlink signaling message is specifically a master information block (MIB) message.

[0092] In a possible implementation, the number of repetitions of the downlink control channel may also be preset, or indicated by the first indication information. In other words, the number of repetitions of the downlink control channel is preset; or, the value of the number of repetitions of the downlink control channel is indicated by the first indication information; or, the index value of the number of repetitions of the downlink control channel in the number of transmissions set is indicated by the first indication information.

[0093] As an implementation, when determining the repetition transmission parameter of the downlink control channel based on the first indication information of the second node, the second node indicates in a downlink signal (referred to as the first downlink signal) before repetition transmission of the downlink control channel whether the downlink control signal is repetition transmitted, the number of repetition transmissions, and repetition transmission resources and other repetition transmission parameters. After receiving the first downlink signal, the first node parses the first downlink signal to determine the repetition transmission parameter of the downlink control signal.

[0094] As an example, for Type0-PDCCH CSS, the second node re-carries the first indication information based on the MIB message before the repeated transmission of the downlink control channel. In other words, the second node indicates the repeated transmission parameters of the downlink control signal to the first node through the MIB message before the repeated transmission of the downlink control channel.

[0095] Among them, with respect to whether to repeat transmission and the number of repetitions in the repeated transmission parameters, the first indication information may be indicated by any one of the following methods 1 to 3.

[0096] Method 1: by indicating whether repeated transmission is allowed, and predefining the number of repeated transmissions. As an example, a 1-bit flag "enable / disable bit flag" is added to the MIB message. When the value of this bit is 0, it indicates that Type0-PDCCH CSS is not repeatedly transmitted. When the value of this bit is 1, it indicates that Type0-PDCCH CSS is repeatedly transmitted, and the number of repeated transmissions is a predefined value. Exemplarily, the predefined numerical value can be a positive integer value such as 2 or 4; in other words, the number of repeated transmissions of Type0-PDCCH CSS is 2 times, or 4 times or other positive integer times.

[0097] Method 2: Directly indicate the number of repeated transmissions. As an example, a 2-bit information field is added to the MIB to indicate the number of repeated transmissions. When the value of the information field is "00", it indicates that the number of repeated transmissions of Type0-PDCCH CSS is 0 times; when the value of the information field is "01", it indicates that the number of repeated transmissions of Type0-PDCCH CSS is 1 time; when the value of the information field is "10", it indicates that the number of repeated transmissions of Type0-PDCCH CSS is 2 times; when the value of the information field is "11", it indicates that the number of repeated transmissions of Type0-PDCCH CSS is 3 times. In addition, more bits can be set to indicate a larger number of repetitions.

[0098] Method 3, indicating the index of the number of repeated transmissions. As an example, the predefined repetition number set is {0, 2, 4, 8}; a 2-bit information field is added in the MIB to indicate the index of the number of repeated transmissions in the predefined repetition number set. For example, when the value of the information field is "00", it corresponds to the first repetition number in the repetition number set, that is, repetition number 0, and the number of repeated transmissions of Type0-PDCCH CSS is 0; when the value of the information field is "01", it corresponds to the second repetition number in the repetition number set, that is, repetition number 2, and the number of repeated transmissions of Type0-PDCCH CSS is 2; when the value of the information field is "10", it corresponds to the third repetition number in the repetition number set, that is, repetition number 4, and the number of repeated transmissions of Type0-PDCCH CSS is 4; when the value of the information field is "11", it corresponds to the fourth repetition number in the repetition number set, that is, repetition number 8, and the number of repeated transmissions of Type0-PDCCH CSS is 8;

[0099] For the repeated transmission resources in the repeated transmission parameters, the first indication information may be indicated in the following manner.

[0100] A 1-bit information field is added to the MIB message. When the value of this information field is 0, it indicates that the Type0-PDCCH CSS has no repeated transmission, and there is no corresponding repeated transmission resource. When the value of this information field is 1, it indicates that the Type0-PDCCH CSS is repeatedly transmitted N times, and the time-frequency resources for repeated transmission of the Type0-PDCCH CSS are N consecutive CSSs. Optionally, the N CSSs are used as a repetition period, and their starting boundary is calculated from the update period boundary of the MIB.

[0101] It should be noted that, in the embodiments of the present disclosure, the repetition transmission parameter of the downlink control channel may be a repetition parameter predefined for different types of SSs, and the present disclosure does not limit this.

[0102] Optionally, the repeated transmission of the downlink control channel may be repeated transmission based on an existing downlink control signal (downlink control information, DCI) format, and coverage enhancement is performed on the PDCCH based on the repeated transmission.

[0103] In the embodiment of the present disclosure, repeated transmission may also be performed based on a new DCI format, thereby achieving enhanced coverage of the PDCCH.

[0104] In some embodiments, the size of the DCI carried by the PDCCH may be reduced by optimizing the format or load of the DCI, thereby reducing the code rate of the PDCCH, thereby achieving enhanced coverage of the PDCCH.

[0105] The above method for optimizing the DCI format includes but is not limited to at least one of the following:

[0106] Reduce the size of the DCI format; for example, reduce the number of bits in the DCI format. As an example, delete or do not transmit some bit fields in the DCI format. The some bit fields may be reserved bits. For example, for DCI in Type0-PDCCH CSS and / or DCI scrambled by SI-RNTI, delete or do not transmit the reserved bits therein.

[0107] Alternatively, a new DCI format is defined, where the new DCI format has fewer bits than the existing DCI format.

[0108] Alternatively, the DCI is transmitted in segments; for example, part of the content of the DCI is transmitted in different PDCCHs. The specific method of transmitting the DCI in segments may be predefined in the protocol or specification, or may be indicated by a downlink signal in the PDCCH before the DCI is transmitted. Optionally, the DCI in different segments may include but is not limited to at least one of the following: the location / resources of other segmented DCIs (e.g., time domain resources, frequency domain resources, detection timing, search space, control resource set), the sequence number of the segmented DCI, and the number of segments.

[0109] In the case of defining a new DCI format as described above, a newly added signaling message may be used to indicate to the terminal whether to use the new DCI format, or a newly added signaling message may be used to indicate the conditions for using the new DCI format. Optionally, the conditions for using the new DCI format include but are not limited to at least one of the following:

[0110] Configure the RSRP threshold. When the RSRP is less than or equal to the threshold, use the new DCI format.

[0111] Alternatively, the PDCCH / DCI category to which the new DCI format is applicable is configured, for example, the new DCI format is applicable to Type0-PDCCH and Type0A-PDCCH.

[0112] Alternatively, the category of RNTI-scrambled PDCCH / DCI applicable to the new DCI format is configured. For example, the new DCI format is applicable to PDCCH / DCI scrambled by SI-RNTI and TC-RNTI.

[0113] Alternatively, the search space SS or PDCCH / DCI on the control resource set CORESET to which the new DCI format is applicable is configured. For example, the new DCI format is applicable to PDCCH / DCI on SS0 and CORESET0.

[0114] It should be pointed out that the search space SS or control resource set CORESET corresponding to the new DCI format may also be defined in advance.

[0115] In the case of the above-mentioned segmented transmission of DCI, it is necessary to indicate to the terminal the configuration related to the segmented transmission of DCI. The configuration related to the segmented transmission of DCI includes but is not limited to at least one of the following: the number of segments, the size of each segment, the resources of the starting segment, the resources of different segments, and the interval between different segments (for example, time offset, frequency offset, detection timing offset).

[0116] The method of indicating to the terminal a configuration related to segmented transmission of DCI includes:

[0117] Configuration related to segmented transmission of DCI is predefined in the protocol or specification.

[0118] Alternatively, the configuration related to the segmented transmission of DCI is indicated in the downlink signal in the PDCCH before the transmission of DCI. Exemplarily, for Type0-PDCCH CSS, its indication can be carried in MIB, MIB-NB, PBCH, and / or NPBCH. For another example, for Type0A-PDCCH CSS / Type1-PDCCH, CSS / Type1A-PDCCH, CSS / Type2-PDCCH, and / or CSS / Type2A-PDCCH CSS, its indication can be carried in SIB1 and / or SIB1-NB. For another example, for Type3-PDCCH CSS and / or PDCCH USS, its indication can be carried in SIB1, SIB1-NB, SIBx, radio resource control (RRC) signaling, and / or media access control control element (MAC CE) signaling, where x is any positive integer.

[0119] It should be pointed out that in the embodiments of the present disclosure, repeated transmission based on the existing DCI format may be used alone, repeated transmission based on the new DCI format may be used alone, or repeated transmission based on the existing DCI format and repeated transmission based on the new DCI format may be used simultaneously. How to use repeated transmission of the DCI format specifically may be indicated by indication information, or may be predefined by a protocol or regulation. For example, activation (usage) conditions are set for repeated transmission based on the existing DCI format and repeated transmission based on the new DCI format, respectively. When one mode is activated, the activated mode is used for repeated transmission of PDCCH, and when both modes are activated, both modes are used for repeated transmission of PDCCH.

[0120] Scenario 1.2: Repeated transmission parameters of downlink data channel

[0121] In the related art, common channels (collectively referred to as commonPDSCH) supported by PDSCH include system information, random access process-related downlink messages, paging, etc. The name of commonPDSCH includes but is not limited to at least one of the following: Msg2 (message 2), Msg4 (message 4), MsgB (message B), paging (paging message), groupcommonPDSCH (group common channel). The radio network temporary identifier (RNTI) types associated with commonPDSCH include at least: system information-radio network temporary identifier (SI-RNTI), random access-radio network temporary identifier (RA-RNTI), temporary cell-radio network temporary identifier (TC-RNTI), message B-radio network temporary identifier (MsgB-RNTI), cell-radio network temporary identifier (C-RNTI), connection state-radio network temporary identifier (CS-RNTI), paging-radio network temporary identifier (P-RNTI), physical layer extended identity-radio network temporary identifier (PEI-RNTI), interference management-radio network temporary identifier (interference management-radio network temporary identifier). identifier, INT-RNTI), scheduling request indication-radio network temporary identifier (SFI-RNTI),transmit power control-physical uplink shared channel-radio network temporary identifier, TPC-PUSCH-RNTI, transmit power control-physical uplink control channel-radio network temporary identifier, TPC-PUCCH-RNTI, transmit power control-sounding reference signal-radio network temporary identifier, TPC-SRS-RNTI, connection indication-radio network temporary identifier, CI-RNTI, cell dynamic transmission reception-radio network temporary identifier, cellDTRX-RNTI, cell-radio network temporary identifier, C-RNTI, modulation and coding scheme-cell-radio network temporary identifier, MCS-C-RNTI, connection state-radio network temporary identifier identifier, CS-RNTI(s)), semi-persistent scheduling-radio network temporary identifier (persistentscheduling-radio network temporary identifier, PS-RNTI).

[0122] Since these common channels are monitored by non-connected (non RRC_CONNECTED) terminals, if repeated transmission is performed on these channels, the terminals need to determine a specific repeated transmission mode so that the terminals can monitor the repeated transmission channels based on the repeated transmission mode.

[0123] In some embodiments, when the downlink channel is a downlink data channel, whether the downlink data channel is repeatedly transmitted and the number of repetitions are determined according to at least one of the following:

[0124] c) Determined according to the downlink control channel that schedules the downlink data channel.

[0125] d) Determined according to the third indication information of other downlink data channels except the downlink data channel.

[0126] For the above c), it is determined according to the downlink control channel that schedules the downlink data channel; if the downlink control channel that schedules the downlink data channel is repeatedly transmitted, the downlink data channel is repeatedly transmitted, and the number of repeated transmissions of the downlink data channel is determined according to the number of repeated transmissions of the downlink control channel.

[0127] In some embodiments, when the downlink control channel that schedules the downlink data channel is repeatedly transmitted, the downlink data channel is also repeatedly transmitted; when the downlink control channel that schedules the downlink data channel is not repeatedly transmitted, the downlink data channel is also not repeatedly transmitted. As an example, for SIB1, if the Type0-PDCCH CSS of SIB1 is scheduled to be repeatedly transmitted, SIB1 is also repeatedly transmitted.

[0128] In some further embodiments, when the number of repetitions of the downlink data channel is determined according to the downlink control channel that schedules the downlink data channel, the number of repetitions of the downlink data channel satisfies at least one of the following:

[0129] The number of repetitions of the downlink data channel is equal to the number of repetitions of the downlink control channel.

[0130] Alternatively, the number of repeated transmissions of the downlink data channel is equal to the product or ratio of the number of repeated transmissions of the downlink control channel and the first value; as an example, for SIB1, if the number of repetitions of the Type0-PDCCH CSS that schedules the SIB1 is 2, then the number of repetitions of SIB1 is 2*M, where M is a positive integer.

[0131] Alternatively, the number of repetitions of the downlink data channel is equal to the sum or difference of the number of repetitions of the downlink control channel and the second value. As an example, for SIB1, if the number of repetitions of the Type0-PDCCH CSS that schedules the SIB1 is 2, the number of repetitions of SIB1 is 2+L, where L is a positive integer. It should be noted that in this case, if the Type0-PDCCH CSS that schedules the SIB1 is not repetitively transmitted, the number of repetitions of the SIB1 is L.

[0132] In some embodiments, for the above-mentioned first value and / or second value, the first value and / or the second value are pre-set; or, the first value and / or the second value are indicated by second indication information; the second indication information is carried in a message before the downlink data channel.

[0133] Optionally, when the first value and / or the second value are pre-set, the size of the first value and / or the second value can be predefined by a protocol or specification, for example, the value of the first value and / or the second value can be predefined as 2 or 4 by a protocol or specification.

[0134] Optionally, when the first value and / or the second value are indicated by the second indication information, the first value and / or the second value may be indicated by other downlink data channels except the downlink data channel. For example, the first value and / or the second value may be indicated in a downlink signal before the PDSCH. As an example, for SIB1, the size of the first value and / or the second value may be indicated by a specific information field in the MIB message, or the index of the first value and / or the second value may be indicated.

[0135] With respect to the above d), the determination is made according to the third indication information of other downlink data channels except the downlink data channel, and the other downlink data channels except the downlink data channel include: the determination is made according to the third indication information of the downlink data channel scheduled before the downlink data channel.

[0136] For example, the number of repetitions of Msg4 in PDSCH can be indicated by Msg2 (such as the random access response (RAR) in Msg2). Optionally, the third indication information is specifically carried in at least one of the following in message 2: the modulation and coding scheme (MCS) field of the uplink grant (UL grant) field, the physical uplink shared channel frequency resource allocation field, the physical uplink shared channel time resource allocation field, the physical uplink shared channel transmission power control (TPC) command; the reserved bit field of the media access control random access response (MACRAR) field, or the time advance code (TAC) field.

[0137] As an example, when reusing the existing bits in the RAR UL grant field in Msg2 to indicate the number of repetitions of Msg4, since the probability of using a larger MCS in a coverage enhancement scenario is small, the MCS field may be able to release some bits, so the number of repetitions of Msg4 is indicated by the highest or lowest 1 or 2 bits in the MCS field. Alternatively, the number of repetitions of Msg4 is indicated by the PUSCH frequency resource allocation field. Alternatively, the number of repetitions of Msg4 is indicated by the PUSCH time resource allocation field. Alternatively, the number of repetitions of Msg4 is indicated by the TPC command for PUSCH.

[0138] As another example, when the existing bit in the MAC RAR in Msg2 is reused to indicate the number of repetitions of Msg4, the number of repetitions of Msg4 can be indicated through the Reserved bit field. Alternatively, the number of repetitions of Msg4 can be indicated through the TAC field.

[0139] It should be noted that the above description is for the case of indicating the repetition parameter of PDSCH. For PUSCH (such as msg5), it can also be determined in a similar manner, and this disclosure will not elaborate on this.

[0140] In some embodiments, repeated transmission of the downlink data channel, such as Msg4, can be achieved through Hybrid Automatic RepeatreQuest (HARQ). At this time, with each repetition, the user's reception delay will extend the round trip time (RTT) or the length of the timing advance TA. For Msg4, the user needs to receive it successfully before the contention resolution timer expires. Therefore, when HARQ retransmission is used to achieve repeated transmission, the contention resolution timer needs to be extended. The extended length can be configured on the network side, such as directly configuring the extended timer length, or the extended length / offset of the timer, or the user can autonomously extend the contention resolution timer according to the number of repetitions and the round trip delay / timing advance (for example, extending N*T, where N is the number of repetitions and T is the round trip delay / timing advance).

[0141] In some embodiments, for the transmission resource of repeated transmission of the downlink data channel, the transmission resource of repeated transmission of the downlink data channel is determined according to at least one of the following:

[0142] The downlink control channel is determined according to an indication of the downlink control channel for scheduling the downlink data channel.

[0143] Alternatively, it is determined according to a preset transmission resource for repeated transmission of a downlink data channel.

[0144] Alternatively, it is determined according to third indication information sent by the second node.

[0145] As an implementation method, when the transmission resources for repeated transmission of a downlink data channel are determined according to the indication of a downlink control channel that schedules the downlink data channel, the transmission resources for the first transmission of the downlink data channel are the time-frequency resources indicated by the downlink control channel that schedules the downlink data channel, and the transmission resources for subsequent repeated transmissions of the downlink data channel are the same time-frequency resources in consecutive P-1 time slots after the time-frequency resources, where P is a positive integer.

[0146] As an implementation, when determined according to the third indication information sent by the second node, the third indication information is carried in a downlink data channel sent before the downlink data channel. The understanding of the third indication information can refer to the above description, and the present disclosure does not limit this.

[0147] The above describes in detail the repetitive transmission parameters of the downlink channel.

[0148] Scenario 2: Reference signal coverage enhancement parameters

[0149] The coverage enhancement parameters of the reference signal are generally applicable to beam-level coverage enhancement. In NTN and high-frequency terrestrial networks, beam scanning (or beam hopping) can be used to serve a larger area with limited concurrent beams. For example, the current NR supports directional scanning of 4 to 64 SSBs in one cell, and multiple beams are used to serve terminals in different directions. For another example, in the current satellite system, multiple concurrent beams are used to simultaneously serve terminals in different geographical locations. The periods of multiple SSBs in one cell are the same. Considering that the number of concurrent beams is less than the area to be covered, the current SSB period is a maximum of 160ms, and beam scanning of the full coverage area may not be completed within one period. Therefore, the embodiment of the present disclosure may extend the period of the downlink common signal. In addition, since different beams may serve areas with different business loads, for example, the terminal density in the area covered by multiple beams of a satellite may vary greatly, multiple SSBs in the same cell correspond to different measurement periods, which can improve the effect of beam scanning. Therefore, the embodiment of the present disclosure may set different measurement periods for different SSBs to achieve downlink coverage enhancement.

[0150] In scenario 2, combined with Figure 3 ,like Figure 7 As shown, the above step 301 can be specifically implemented by the following steps 701:

[0151] Step 701: The first node receives fourth indication information.

[0152] The fourth indication information is used to indicate the coverage enhancement parameter of the reference signal.

[0153] In some embodiments, the reference signal is a synchronization signal block (SSB) or a channel state information reference signal (CSI-RS). In the embodiments of the present disclosure, the reference signal is mainly described by taking the synchronization signal block SSB as an example.

[0154] As an implementation method, when the reference signal is a synchronization signal block, the fourth indication information is carried in a synchronization signal block measurement timing configuration message.

[0155] Optionally, the coverage enhancement parameter of the reference signal includes multiple synchronization signal block measurement periods of the target cell, and each synchronization signal block measurement period corresponds to one or more synchronization signal blocks.

[0156] As an implementation method, the fourth indication information is used to indicate the synchronization signal block corresponding to each synchronization signal block measurement period of the target cell; or, the fourth indication information is used to indicate the synchronization signal block corresponding to the target synchronization signal block measurement period of the target cell.

[0157] Optionally, the fourth indication information indicates the synchronization signal block based on at least one of: an index of the synchronization signal block; an index of the synchronization signal block group to which the synchronization signal block belongs; an index of a boundary synchronization signal block of the synchronization signal block group to which the synchronization signal block belongs; wherein the target cell has multiple synchronization signal block groups, each synchronization signal block group includes at least one synchronization signal block, and each synchronization signal block group corresponds to a synchronization signal block measurement cycle; the boundary synchronization signal block is the synchronization signal block with the largest and / or smallest index value in the synchronization signal block group.

[0158] Optionally, the target cell includes a service cell of the first node and / or a neighboring cell of the service cell of the first node.

[0159] The coverage enhancement parameters of the reference signal are described below with reference to specific examples. In the related art, the network device can send the RRM measurement configuration to the terminal through measObjectNR. The RRM measurement configuration includes smtc1 (also referred to as SSB-MTC) for indicating the measurement period and frequency shift, as well as the measurement duration.

[0160] As an example, the content of SSB-MTC is as follows:

[0161] SSB-MTC:: =SEQUENCE{

[0162] periodicityAndOffset CHOICE{

[0163] sf5 INTEGER(0..4),

[0164] sf10 INTEGER(0..9),

[0165] sf20 INTEGER(0..19),

[0166]

[0167] In the embodiments of the present disclosure, the SSB period may be extended. When the SSB period is extended, some information fields (IE) in the SSB-MTC, such as the value range of periodicityAndOffset, need to be updated.

[0168] As an example 1, the SSB period is extended, and two new SSB periods are added: {320ms, 640ms}. The updated SSB-MTC content is as follows:

[0169]

[0170] Based on the above example 1, two new SSB periods of 320ms and 640ms are added to the periodicityAndOffset of SSB-MTC. The current maximum SSB period of 160ms is extended to a maximum period of 640ms. In this way, even if the number of concurrent beams is less than the area to be covered, the beam scanning of the coverage area can be completed within one period.

[0171] In some embodiments, the coverage enhancement parameter of the reference signal includes multiple synchronization signal block measurement periods of the target cell, each synchronization signal block measurement period corresponds to one or more synchronization signal blocks. The fourth indication information is used to indicate the synchronization signal block corresponding to each synchronization signal block measurement period of the target cell; or the fourth indication information is used to indicate the synchronization signal block corresponding to the target synchronization signal block measurement period of the target cell.

[0172] As an example 2, combined with the above example 1, on the basis of extending the SSB period, a new SSB group and the indication content of the measurement period corresponding to the SSB group are added. Taking the example of dividing the SSB into two groups, one corresponding to the high-load coverage area and the other corresponding to the low-load coverage area, the content of SSB-MTC is as follows:

[0173]

[0174] }

[0175] Among them, the above "SsbInfo" is a newly added field content used to indicate SSB (such as the grouping of SSB). Optionally, this field can also indicate the correspondence between SSB grouping and measurement period. periodicityAndOffset1 is the configuration of the first group of measurement periods of the cell, and periodicityAndOffset1 is the configuration of the second group of measurement periods of the cell.

[0176] In conjunction with the above example 2, when the fourth indication information indicates the correspondence between the measurement period and the SSB, the synchronization signal block corresponding to the target synchronization signal block measurement period of the target cell may be indicated. For example, the fourth indication information indicates the index of the SSB corresponding to the above first group of measurement periods. Since only two measurement periods are divided in the above example 2. Therefore, after indicating the SSB corresponding to a group of measurement periods, it can be assumed that other SSBs use the second group of measurement periods. In addition, the SSB index corresponding to the second group of measurement periods may also be indicated, and other SSBs use the first group of measurement periods.

[0177] In combination with the above example 2, when the fourth indication information indicates the correspondence between the measurement period and the SSB, it can also indicate the synchronization signal block corresponding to each synchronization signal block measurement period of the target cell. For example, the fourth indication information respectively indicates the index of the SSB corresponding to the above-mentioned first group of measurement periods, and the index of the SSB corresponding to the above-mentioned second group of measurement periods. Optionally, the intersection of the index of the SSB corresponding to the first group of measurement periods and the index of the SSB corresponding to the second group of measurement periods is an empty set; the union of the index of the SSB corresponding to the first group of measurement periods and the index of the SSB corresponding to the second group of measurement periods is the index of all SSBs sent by the cell.

[0178] In one possible implementation, the fourth indication information indicates the synchronization signal block based on at least one of the following: an index of the synchronization signal block; an index of the synchronization signal block group to which the synchronization signal block belongs; an index of a boundary synchronization signal block of the synchronization signal block group to which the synchronization signal block belongs; a boundary synchronization signal block is a synchronization signal block with the largest and / or smallest index value in the synchronization signal block group; wherein the target cell has multiple synchronization signal block groups, each synchronization signal block group includes at least one synchronization signal block, and each synchronization signal block group corresponds to a synchronization signal block measurement period.

[0179] Combined with the above example 2, the fourth indication information can indicate the synchronization signal block in the form of a Bitmap. For example, the cell has a total of 8 SSBs, and the SSBs are divided into 2 groups. Then 8 bits are used in the fourth indication information to represent the grouping of each SSB. Taking the 8 bits as "00001111" as an example, the first 4 "0"s indicate that SSB index 0~3 use periodicityAndOffset1, and the last 4 "1"s indicate that SSB index 4~7 use periodicityAndOffset2.

[0180] Alternatively, the fourth indication information indicates the synchronization signal block in the form of an SSB index list. For example, the cell has a total of 8 SSBs, and the SSBs are divided into 2 groups. Then {0, 1, 2, 3} can be used in the fourth indication information to represent the first group, indicating that SSBindex 0 to 3 use periodicityAndOffset1. Since the SSB is divided into only 2 groups, other SSB indexes except SSB index 0 to 3 use periodicityAndOffset2.

[0181] If the SSB is divided into 3 groups, the corresponding measurement period configuration of the cell includes: periodicityAndOffset1, periodicityAndOffset2 and periodicityAndOffset3. In the fourth indication information, {0, 1, 2, 3} can be used to represent the first group, indicating that SSB index 0 to 3 use periodicityAndOffset1; {4, 5} can be used to represent the second group, indicating that SSB index 4 to 5 use periodicityAndOffset2. Since SSB is divided into only 3 groups, the remaining SSBindex uses periodicityAndOffset3.

[0182] Alternatively, the fourth indication information indicates the synchronization signal block in the form of an SSB index boundary. For example, the cell has a total of 8 SSBs, and the SSBs are divided into 2 groups. In the fourth indication information, {3} can be used to represent the last SSBindex in the first group. The first group includes SSB indices from the first actually sent SSB index to the last SSB index (that is, to the SSB index with an index of 3). For example, if the first actually sent SSB index is 0, the first group contains SSB indexes {0, 1, 2, 3}, and these SSB indices use periodicityAndOffset1. The remaining SSB indices use periodicityAndOffset2.

[0183] If the SSB is divided into 3 groups, the measurement period configuration of the cell includes: periodicityAndOffset1, periodicityAndOffset2 and periodicityAndOffset3. In the fourth indication information, {3, 5} can be used to represent the last SSB index in the first group and the second group. The first group includes SSB indexes from the first actually sent SSB index to the last SSB index corresponding to the first group. For example, if the first actually sent SSB index is 0, the first group contains SSB index {0, 1, 2, 3}, and the first group uses periodicityAndOffset1. The second group includes SSB indexes from the first SSB index actually sent after the last SSB index of the first group to the last SSB index corresponding to the second group, using periodicityAndOffset2. For example, if the first actually sent SSB index in the second group is 4, the first group contains SSB index {4, 5}. The remaining SSB indexes use periodicityAndOffset3.

[0184] It should be noted that, when the fourth indication information indicates the synchronization signal block in the form of an SSB index boundary, the fourth indication information may also indicate the first SSB index of each group. The present disclosure does not limit this.

[0185] In a possible implementation, the SSB-MTC in the above example 1 and the above example 2 may be applicable to the case of configuring the measurement of the current cell.

[0186] When configuring the neighboring cell, the measurement configuration of the neighboring cell can be configured for the terminal through smtc4. At this time, the measurement cycle and measurement duration in the above smtc1 (such as the above example 1 and the above example 2) can be reused.

[0187] As an example, in the related art, the content of smtc4 is as follows:

[0188]

[0189] In the disclosed embodiment, the SSB period of the neighboring cell can be extended. When the SSB period is extended, the content of the offset part in smtc4 needs to be updated. As an example, when the measurement period of SSB is extended to add two measurement periods {320ms, 640ms}, the value range field of the offset in smtc4 is updated.

[0190] As an example 3, the content of this field after update is:

[0191] offset INTEGER (0…639)

[0192] In addition, in order to indicate the different measurement periods corresponding to multiple SSBs in each neighboring cell, a new information field indicating multiple SSB period parameters in each neighboring cell needs to be added in SSB-MTC4. The architecture of the required additional information is as follows: Figure 8 The required additional information includes N SSB groups for each neighboring cell and the measurement period or offset corresponding to each SSB group.

[0193] As an example 4, the SSB measurement period is extended to add two values ​​{320ms, 640ms}. There are M neighboring cells in total, and the SSB of each neighboring cell is divided into N groups at most, and each group corresponds to a measurement period. Taking the value of N as 2 as an example, the content of the updated smtc4 is as follows:

[0194]

[0195] (1..maxNrofPCIsPerSMTC*maxNrofSsbGroupPerPci))OF periodicityAndOffset

[0196] ...corresponding to a maximum of M neighboring cells, each neighboring cell has a maximum of N SSB packets with a period and offset durationENUMERATED{sf1,sf2,sf3,sf4,sf5}

[0197] }

[0198] Regarding the above SsbInfoPerPci, its specific content is:

[0199] SsbInfoPerPci::=SEQUENCE(SIZE(1..maxNrofSsbGroupPerPci))OF SsbInfo

[0200] ...corresponding to the maximum N SSB groups in a single neighboring cell, N = maxNrofSsbGroupPerPciperiodicityAndOffset::=CHOICE{

[0201] sf5 INTEGER(0..4),

[0202] sf10 INTEGER(0..9),

[0203] sf20 INTEGER(0..19),

[0204] sf40 INTEGER(0..39),

[0205] sf80 INTEGER(0..79),

[0206] sf160 INTEGER(0..159)

[0207] sf320 INTEGER(0..319)

[0208] sf640 INTEGER(0..639)

[0209] The above-mentioned SsbInfo is used to indicate SSB (such as the grouping status of SSB). Its specific content can refer to the above-mentioned Example 2, and the present disclosure does not limit this.

[0210] As an example 5, the SSB measurement period is extended to add two values ​​{320ms, 640ms}. There are M neighboring cells in total, and the SSB of each neighboring cell is divided into N groups at most, and each group corresponds to a measurement period. Taking the value of N as 2 as an example, the updated smtc4 can also be as follows: SSB-MTC4::=SEQUENCE{

[0211] ssbInfoAndPeriodAndOffsetPerPci-List SEQUENCE(SIZE(1..maxNrofPCIsPerSMTC))OF SsbInfoAndPeriodAndOffsetPerPci

[0212] ...corresponding to M neighboring cells, M = maxNrofPCIsPerSMTC duration ENUMERATED{sf1,sf2,sf3,sf4,sf5}

[0213] }

[0214] Wherein, for the above SsbInfoAndPeriodAndOffsetPerPci, its content may specifically be: SsbInfoAndPeriodAndOffsetPerPci::=SEQUENCE{

[0215] physicalCellId PhysCellId

[0216] ssbInfo SsbInfo periodicityAndOffset-List SEQUENCE(SIZE(1..maxNrofSsbGroupPerPci))OF periodicityAndOffset

[0217] },

[0218] Among them, the above-mentioned SsbInfo is used to indicate the SSB (such as the grouping of the SSB), and its specific content can refer to the above-mentioned Example 2, and the present disclosure does not limit this. periodicityAndOffset is used to indicate the measurement period and offset used for each SSB grouping, and its specific content can refer to the specific content of periodicityAndOffset in Example 4. The number of SSB groups indicated by ssbInfo in Example 5 is the same as the number of periodicityAndOffset in periodicityAndOffset-List; the SSB groups and periodicityAndOffset can be mapped one-to-one by sorting the SSB groups and periodicityAndOffset.

[0219] Scenario 3: TDD coverage enhancement parameters

[0220] In some embodiments, the coverage enhancement of time division duplexing may be that the start time of downlink transmission is not required to be aligned with the frame timing, but can be flexibly adjusted based on coverage requirements.

[0221] In the current TDD, time domain resources are usually divided periodically, one part for uplink transmission, one part for downlink transmission, and one part for flexible / special transmission. When TDD technology is applied in NTN, in order to avoid conflicts between uplink transmission and downlink transmission (such as the impact of a larger timing advance (TA) on uplink transmission and downlink transmission), a larger protection interval needs to be set between the downlink transmission time domain resources and the uplink transmission time domain resources. This will result in very limited resources for uplink and downlink transmission in the TDD system of NTN. For example, usually only 8 subframes can be allocated for downlink transmission. In this case, in order to ensure that the transmission can fully cover the transmission timing of common channels (such as SSB, narrowband primary synchronization signal (NPSS), narrowband secondary synchronization signal (NSSS), narrowband physical broadcast channel (NPBCH), SIB1, etc.), in the embodiment of the present disclosure, the start time of the downlink transmission is not required to be aligned with the frame timing, but can be flexibly adjusted based on the coverage requirements. As an example, such as Fig. 9 As shown, the downlink time domain resources are part of the subframe at the end of the first system frame and part of the subframe at the head of the second system frame. For the same reason, the start time of uplink transmission is not required to be aligned with the frame timing, but can be flexibly adjusted based on coverage requirements.

[0222] In order to achieve that the start time of transmission is not aligned with the frame timing, when configuring the transmission cycle, the offset between the start time of transmission and the frame timing and / or the relevant parameters of the cycle configuration can be indicated through the indication information. As an example, Fig.10 As shown, it is a schematic diagram of transmission cycle configuration.

[0223] As a way to achieve this, combining Fig.10 The parameters configured during the transmission cycle configuration include but are not limited to at least one of the following:

[0224] The length, minimum length, and / or additional length of downlink transmission resources, such as continuous time domain resources that can be used for downlink transmission.

[0225] Or, the length, minimum length, and / or additional length of uplink transmission resources, such as continuous time domain resources that can be used for uplink transmission.

[0226] Or, the length of the periodic pattern.

[0227] Or, the offset of the downlink transmission resource. The offset of the downlink transmission resource may be the offset of the start and / or end time of the downlink transmission resource and the start time of the system frame 0. Or, the offset of the downlink transmission resource may be the offset of the start and / or end time of the downlink transmission resource and the start and / or end time of the system frame in which the downlink transmission resource starts and / or ends. Alternatively, the offset of the downlink transmission resource may be the offset of the start and / or end time of the downlink transmission resource and the start and / or end time of the periodic pattern. Alternatively, the offset of the downlink transmission resource may be the offset of the start and / or end time of the downlink transmission resource and the start and / or end time of the uplink transmission resource. Alternatively, the offset of the downlink transmission resource may be the offset of the start and / or end time of a section of downlink transmission resources and the start and / or end time of the previous section, and / or another section of downlink transmission resources.

[0228] Or, the offset of the uplink transmission resource. The offset of the uplink transmission resource may be the offset of the start and / or end time of the uplink transmission resource and the start time of the system frame 0. Or, the offset of the uplink transmission resource may be the offset of the start and / or end time of the uplink transmission resource and the start and / or end time of the system frame in which the uplink transmission resource starts and / or ends. Alternatively, the offset of the uplink transmission resource may be the offset of the start and / or end time of the uplink transmission resource and the start and / or end time of the periodic pattern. Alternatively, the offset of the uplink transmission resource may be the offset of the start and / or end time of the uplink transmission resource and the start and / or end time of the downlink transmission resource. Alternatively, the offset of the uplink transmission resource may be the offset of the start and / or end time of a segment of uplink transmission resources and the start and / or end time of the previous segment, and / or another segment of uplink transmission resources.

[0229] Or, the offset of the periodic pattern. The offset of the periodic pattern may be the offset between the start time of the periodic pattern and the start time of the system frame 0. Or, the offset of the periodic pattern may be the offset between the start time and / or end time of the periodic pattern and the start and / or end time of the system frame where the start and / or end time of the periodic pattern is located.

[0230] It should be noted that the parameters configured when performing the transmission cycle configuration may only configure some of the parameters recorded above, or may configure all of the parameters recorded above. For example, the start time of the transmission resource may also be aligned with the start time of the periodic mode. In this case, only the offset of the downlink transmission resource or the offset of the periodic mode needs to be introduced, without introducing both offsets at the same time. In this case, the schematic diagram of the transmission cycle configuration is as follows Fig.11 shown.

[0231] It should be noted that the above configuration of the transmission cycle can be performed by at least one of the following:

[0232] MIB, master information block-narrowband (MIB-NB), physical broadcast channel (PBCH), narrowband physical broadcast channel (NPBCH) indication.

[0233] Or, SIBx / system information block x-narrowband (SIBx-NB) indication (x may be any number), RRC signaling indication, MAC CE indication, DCI indication.

[0234] The unit of the length or offset includes but is not limited to at least one of the following: superframe, frame, subframe, time slot, symbol, millisecond or a unit of a corresponding level (for example, the unit may be N subframes, N ms, etc.). The start time or end time includes but is not limited to at least one of the following: superframe number, frame number, subframe number, time slot number, symbol number, or absolute time such as year, month, day, hour, minute, second, millisecond, microsecond, etc. Alternatively, the parameters configured when performing the transmission cycle configuration may be predefined in the specification.

[0235] In the disclosed embodiments, the configuration methods for the transmission period configuration can be combined with each other. For example, the protocol specification predefines the length and offset of the periodic pattern, as well as the minimum length and offset of the downlink transmission resource; the length and offset of the broadcast uplink transmission resource in SIB1-NB, as well as the length / extra length of the downlink transmission resource.

[0236] Optionally, when configuring the transmission cycle, one parameter may be configured multiple times. For example, when two downlink transmission resources are configured in a periodic mode, two downlink transmission resource offsets may be configured.

[0237] The above scenarios and methods can be combined, and the embodiments of the present disclosure are not limited to this.

[0238] It is understandable that, in order to realize the above functions, the covering device includes hardware structures and / or software modules corresponding to the execution of each function. Those skilled in the art should easily realize that, in combination with the algorithm steps of each example described in the embodiments of the present disclosure, the embodiments of the present disclosure can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in the form of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the embodiments of the present disclosure.

[0239] The embodiments of the present disclosure may divide the functional modules of the covering device according to the above method embodiments. For example, each functional module may be divided corresponding to each function, or two or more functions may be integrated into one functional module. The above integrated modules may be implemented in the form of hardware or software. It should be noted that the division of modules in the embodiments of the present disclosure is schematic and is only a logical function division. There may be other division methods in actual implementation. The following is an example of dividing each functional module corresponding to each function.

[0240] Fig.12 1 is a schematic diagram of the structure of a covering device 120 provided in an embodiment of the present disclosure. The covering device 120 can execute the covering method performed by the first node provided in the above method embodiment. Fig.12 As shown, the covering device includes: a processing unit 1201 and a communication unit 1202 .

[0241] The communication unit 1202 is used to obtain configuration parameters; the configuration parameters include repetition transmission parameters of the downlink channel and / or coverage enhancement parameters of the reference signal.

[0242] The processing unit 1201 is configured to perform communication transmission based on configuration parameters and / or perform measurement.

[0243] In a possible implementation manner, the downlink channel includes a downlink control channel and / or a downlink data channel.

[0244] In a possible implementation, when the downlink channel is a downlink control channel, the repetition transmission parameters of the downlink channel include at least one of the following: whether to repeatedly transmit the downlink control channel, the number of repeated transmissions of the downlink control channel, and the transmission resources used for repeatedly transmitting the downlink control channel.

[0245] In one possible implementation, the repetition transmission parameter of the downlink control channel is determined based on at least one of the following: predefining the repetition transmission parameter of the downlink control channel corresponding to different types of networks; or determining the repetition transmission parameter of the downlink control channel based on the first indication information of the second node.

[0246] In one possible implementation, repetition transmission parameters of downlink control channels corresponding to different types of networks are predefined, including at least one of the following: predefining downlink control channels for repeated transmission in specific network scenarios; predefining the number of repeated transmissions of downlink control channels in specific network scenarios; predefining transmission resources for repeated transmission of downlink control channels in specific network scenarios.

[0247] In a possible implementation manner, the first indication information is carried in a downlink signaling message sent before the downlink control channel.

[0248] In a possible implementation manner, the downlink signaling message specifically includes a master information block MIB message.

[0249] In one possible implementation, the number of repeated transmissions of the downlink control channel is pre-set; or, the value of the number of repeated transmissions of the downlink control channel is indicated by the first indication information; or, the index value of the number of repeated transmissions of the downlink control channel in the transmission number set is indicated by the first indication information.

[0250] In a possible implementation, the transmission resources used for repeatedly transmitting the downlink control channel include N common search spaces CSS, and the N CSSs are located in the time domain after the reception time of the first indication information.

[0251] In one possible implementation, when the downlink channel is a downlink data channel, whether the downlink data channel is repeatedly transmitted and the number of repetitions are determined according to at least one of the following: according to a downlink control channel that schedules the downlink data channel; or according to a third indication information indication of other downlink data channels except the downlink data channel.

[0252] In one possible implementation, whether a downlink data channel is to be repeatedly transmitted and the number of repetitions are determined based on a downlink control channel that schedules the downlink data channel, including: if a downlink control channel that schedules the downlink data channel is to be repeatedly transmitted, the downlink data channel is repeatedly transmitted, and the number of repeated transmissions of the downlink data channel is determined based on the number of repeated transmissions of the downlink control channel.

[0253] In a possible implementation manner, other downlink data channels except the downlink data channel include downlink data channels scheduled before the downlink data channel.

[0254] In a possible implementation, when the number of repetitions of a downlink data channel is determined according to a downlink control channel that schedules the downlink data channel, the number of repetitions of the downlink data channel satisfies at least one of the following: the number of repeated transmissions of the downlink data channel is equal to the number of repeated transmissions of the downlink control channel; the number of repeated transmissions of the downlink data channel is equal to the product or ratio of the number of repeated transmissions of the downlink control channel and a first value; the number of repeated transmissions of the downlink data channel is equal to the sum or difference of the number of repeated transmissions of the downlink control channel and a second value.

[0255] In a possible implementation, the first value and / or the second value are pre-set; or, the first value and / or the second value are indicated by second indication information; and the second indication information is carried in a message before the downlink data channel.

[0256] In one possible implementation, the transmission resources for repeated transmission of the downlink data channel are determined based on at least one of the following: based on an indication of a downlink control channel that schedules the downlink data channel; based on a preset transmission resource for repeated transmission of the downlink data channel; or based on third indication information sent by the second node.

[0257] In one possible implementation, when the transmission resources for repeated transmission of a downlink data channel are determined based on an indication of a downlink control channel that schedules the downlink data channel, the transmission resources for the first transmission of the downlink data channel are the time-frequency resources indicated by the downlink control channel that schedules the downlink data channel, and the transmission resources for subsequent repeated transmissions of the downlink data channel are the same time-frequency resources in consecutive P-1 time slots after the time-frequency resources, where P is a positive integer.

[0258] In a possible implementation manner, the third indication information is carried in a downlink data channel sent before the downlink data channel.

[0259] In a possible implementation manner, the downlink data channel includes message 4, the downlink data channel sent before the downlink data channel includes message 2, and the third indication information is carried in message 2.

[0260] In one possible implementation, the third indication information is specifically carried in at least one of the following in message 2: the modulation and coding scheme MCS field of the uplink grant UL grant field, the physical uplink shared channel frequency resource allocation field, the physical uplink shared channel time resource allocation field, the transmission power control TPC command of the physical uplink shared channel; the reserved bit field of the media access control random access response MAC RAR field, or the time advance TAC field.

[0261] In a possible implementation, the communication unit 1202 is further used to receive fourth indication information, where the fourth indication information is used to indicate a coverage enhancement parameter of a reference signal.

[0262] In a possible implementation, the reference signal is a synchronization signal block or a channel state information reference signal.

[0263] In a possible implementation, when the reference signal is a synchronization signal block, the fourth indication information is carried in a synchronization signal block measurement timing configuration message.

[0264] In one possible implementation, the coverage enhancement parameter of the reference signal includes multiple synchronization signal block measurement periods of the target cell, and each synchronization signal block measurement period corresponds to one or more synchronization signal blocks.

[0265] In one possible implementation, the fourth indication information is used to indicate the synchronization signal block corresponding to each synchronization signal block measurement period of the target cell; or, the fourth indication information is used to indicate the synchronization signal block corresponding to the target synchronization signal block measurement period of the target cell.

[0266] In a possible implementation manner, the fourth indication information indicates a synchronization signal block based on at least one of the following:

[0267] The index of the synchronization signal block; the index of the synchronization signal block group to which the synchronization signal block belongs; wherein the target cell has multiple synchronization signal block groups, each synchronization signal block group includes at least one synchronization signal block, and each synchronization signal block group corresponds to a synchronization signal block measurement period; the index of the boundary synchronization signal block of the synchronization signal block group to which the synchronization signal block belongs; the boundary synchronization signal block is the synchronization signal block with the largest and / or smallest index value in the synchronization signal block group.

[0268] In a possible implementation manner, the target cell includes a serving cell of the first node and / or a neighboring cell of the serving cell of the first node.

[0269] In the case of implementing the functions of the above-mentioned integrated modules in the form of hardware, the embodiments of the present disclosure provide another possible structure of the covering device involved in the above-mentioned embodiments. Fig.13 As shown, the covering device 130 includes: a processor 1302 and a bus 1304. Optionally, the covering device may further include a memory 1301; optionally, the covering device may further include a communication interface 1303.

[0270] The processor 1302 may be a processor that implements or executes various exemplary logic blocks, modules, and circuits described in conjunction with the embodiments of the present disclosure. The processor 1302 may be a central processing unit, a general-purpose processor, a digital signal processor, an application-specific integrated circuit, a field programmable gate array, or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It may implement or execute various exemplary logic blocks, modules, and circuits described in conjunction with the embodiments of the present disclosure. The processor 1302 may also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of a DSP and a microprocessor, and the like.

[0271] The communication interface 1303 is used to connect with other devices via a communication network, such as Ethernet, wireless access network, wireless local area network (WLAN), etc.

[0272] The memory 1301 may be a read-only memory (ROM) or other types of static storage devices that can store static information and instructions, a random access memory (RAM) or other types of dynamic storage devices that can store information and instructions, or an electrically erasable programmable read-only memory (EEPROM), a disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store desired program codes in the form of instructions or data structures and can be accessed by a computer, but is not limited thereto.

[0273] As a possible implementation, the memory 1301 may exist independently of the processor 1302, and the memory 1301 may be connected to the processor 1302 via a bus 1304 to store instructions or program codes. When the processor 1302 calls and executes the instructions or program codes stored in the memory 1301, the encoding method or decoding method provided in the embodiment of the present disclosure can be implemented.

[0274] In another possible implementation, the memory 1301 may also be integrated with the processor 1302 .

[0275] The bus 1304 may be an extended industry standard architecture (EISA) bus, etc. The bus 1304 may be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Fig.13 Only one thick line is used in the diagram, but this does not mean that there is only one bus or only one type of bus.

[0276] Some embodiments of the present disclosure provide a computer-readable storage medium (e.g., a non-transitory computer-readable storage medium), which stores computer program instructions. When the computer program instructions are executed on a computer, the computer executes the encoding method or decoding method as described in any of the above embodiments.

[0277] Exemplarily, the above-mentioned computer-readable storage media may include, but are not limited to: magnetic storage devices (e.g., hard disks, floppy disks or magnetic tapes, etc.), optical disks (e.g., compact disks (CD), digital versatile disks (DVD), etc.), smart cards and flash memory devices (e.g., erasable programmable read-only memory (EPROM), cards, sticks or key drives, etc.). The various computer-readable storage media described in the embodiments of the present disclosure may represent one or more devices and / or other machine-readable storage media for storing information. The term "machine-readable storage medium" may include, but is not limited to, wireless channels and various other media capable of storing, containing and / or carrying instructions and / or data.

[0278] An embodiment of the present disclosure provides a computer program product including instructions. When the computer program product is run on a computer, the computer is enabled to execute the covering method described in any one of the above embodiments.

[0279] The above is only a specific implementation of the embodiment of the present disclosure, but the protection scope of the embodiment of the present disclosure is not limited thereto. Any changes or substitutions within the technical scope disclosed in the embodiment of the present disclosure should be included in the protection scope of the embodiment of the present disclosure. Therefore, the protection scope of the embodiment of the present disclosure should be based on the protection scope of the claims.

Claims

1. A covering method, characterized in that: Applied to the first node, the method comprises: Acquiring configuration parameters; the configuration parameters include repetition transmission parameters of a downlink channel and / or coverage enhancement parameters of a reference signal; Communication transmission is performed based on the configuration parameters, and / or measurement is performed.

2. The method according to claim 1, characterized in that The downlink channel includes a downlink control channel and / or a downlink data channel.

3. The method according to claim 2, characterized in that In the case that the downlink channel is a downlink control channel, the repetition transmission parameter of the downlink channel includes at least one of the following: whether to repetitively transmit the downlink control channel, the number of repetition transmissions of the downlink control channel, and the transmission resources used for repetitive transmission of the downlink control channel.

4. The method according to claim 3, characterized in that The repetition transmission parameter of the downlink control channel is determined based on at least one of the following: Predefine repetitive transmission parameters of downlink control channels corresponding to different types of networks; Alternatively, the repetition transmission parameter of the downlink control channel is determined based on the first indication information of the second node.

5. The method according to claim 4, characterized in that The predefined repetitive transmission parameters of the downlink control channel corresponding to different types of networks include at least one of the following: predefining the downlink control channel to be repeatedly transmitted in a specific network scenario; predefine the number of repeated transmissions of the downlink control channel in a specific network scenario; Predefine the transmission resources for repeatedly transmitting the downlink control channel in the specific network scenario.

6. The method according to claim 4, characterized in that The first indication information is carried in a downlink signaling message sent before the downlink control channel.

7. The method according to claim 6, characterized in that The downlink signaling message specifically includes a master information block MIB message.

8. The method according to claim 4, characterized in that The number of repeated transmissions of the downlink control channel is preset; or, The value of the number of repeated transmissions of the downlink control channel is indicated by the first indication information; or, The index value of the number of repeated transmissions of the downlink control channel in the transmission number set is indicated by the first indication information.

9. The method according to claim 4, characterized in that The transmission resources used for repeatedly transmitting the downlink control channel include N common search spaces CSS, and the N CSSs are the same time-frequency resources in N consecutive time slots.

10. The method according to claim 4, characterized in that The transmission resources used for repeatedly transmitting the downlink control channel include a symbol set of N consecutive CORESET lengths.

11. The method according to claim 4, characterized in that The transmission resources used for repeatedly transmitting the downlink control channel include N consecutive available symbol sets of CORESET length.

12. The method according to claim 3, characterized in that In the case where the downlink channel is a downlink data channel, whether the downlink data channel is repeatedly transmitted and the number of repetitions are determined according to at least one of the following: Determining according to a downlink control channel that schedules the downlink data channel; The determination is performed according to the third indication information of other downlink data channels except the downlink data channel.

13. The method according to claim 12, characterized in that Determining whether to repeatedly transmit the downlink data channel and the number of repetitions according to the downlink control channel that schedules the downlink data channel includes: If the downlink control channel of the downlink data channel is scheduled to be repeatedly transmitted, the downlink data channel is repeatedly transmitted, and the number of repeated transmissions of the downlink data channel is determined according to the number of repeated transmissions of the downlink control channel.

14. The method according to claim 12, characterized in that The other downlink data channels except the downlink data channel include downlink data channels scheduled before the downlink data channel.

15. The method according to claim 12, characterized in that In the case where the number of repetitions of the downlink data channel is determined according to the downlink control channel that schedules the downlink data channel, the number of repetitions of the downlink data channel satisfies at least one of the following: The number of repeated transmissions of the downlink data channel is equal to the number of repeated transmissions of the downlink control channel; The number of repeated transmissions of the downlink data channel is equal to the product or ratio of the number of repeated transmissions of the downlink control channel and the first value; The number of repeated transmissions of the downlink data channel is equal to the sum or difference of the number of repeated transmissions of the downlink control channel and the second value.

16. The method according to claim 15, characterized in that The first value and / or the second value are preset; or, The first value and / or the second value is indicated by second indication information; the second indication information is carried in a message before the downlink data channel.

17. The method according to claim 12, characterized in that The transmission resource for repeated transmission of the downlink data channel is determined according to at least one of the following: Determining according to an indication of a downlink control channel that schedules the downlink data channel; Determined according to a preset transmission resource for repeated transmission of a downlink data channel; The determination is made according to third indication information sent by the second node.

18. The method according to claim 17, characterized in that In a case where the transmission resources for repeated transmission of the downlink data channel are determined according to an indication of a downlink control channel that schedules the downlink data channel, the transmission resources for the first transmission of the downlink data channel are the time-frequency resources indicated by the downlink control channel that schedules the downlink data channel, and the transmission resources for subsequent repeated transmissions of the downlink data channel are the same time-frequency resources in consecutive P-1 time slots after the time-frequency resources, where P is a positive integer.

19. The method according to claim 17, characterized in that The third indication information is carried on a downlink data channel sent before the downlink data channel.

20. The method according to claim 19, characterized in that The downlink data channel includes message 4 , the downlink data channel sent before the downlink data channel includes message 2 , and the third indication information is carried in message 2 .

21. The method according to claim 20, characterized in that The third indication information is specifically carried in at least one of the following in the message 2: the modulation and coding scheme MCS field of the uplink grant UL grant field, the physical uplink shared channel frequency resource allocation field, the physical uplink shared channel time resource allocation field, the transmission power control TPC command of the physical uplink shared channel; the reserved bit field of the media access control random access response MAC RAR field, or the time advance TAC field.

22. The method according to claim 1, characterized in that Acquiring a coverage enhancement parameter of the reference signal includes: Fourth indication information is received, where the fourth indication information is used to indicate a coverage enhancement parameter of the reference signal.

23. The method according to claim 22, characterized in that The reference signal is a synchronization signal block or a channel state information reference signal.

24. The method according to claim 23, characterized in that In the case where the reference signal is a synchronization signal block, the fourth indication information is carried in a synchronization signal block measurement timing configuration message.

25. The method according to claim 23, characterized in that The coverage enhancement parameter of the reference signal includes multiple synchronization signal block measurement periods of the target cell, and each synchronization signal block measurement period corresponds to one or more synchronization signal blocks.

26. The method according to claim 25, characterized in that The fourth indication information is used to indicate the synchronization signal block corresponding to each synchronization signal block measurement period of the target cell; or, The fourth indication information is used to indicate the synchronization signal block corresponding to the target synchronization signal block measurement period of the target cell.

27. The method according to claim 22, characterized in that The fourth indication information indicates a synchronization signal block based on at least one of the following: The index of the synchronization signal block; An index of a synchronization signal block group to which the synchronization signal block belongs; wherein the target cell has multiple synchronization signal block groups, each synchronization signal block group includes at least one synchronization signal block, and each synchronization signal block group corresponds to a synchronization signal block measurement period; The index of the boundary synchronization signal block of the synchronization signal block group to which the synchronization signal block belongs; the boundary synchronization signal block is the synchronization signal block with the largest and / or smallest index value in the synchronization signal block group.

28. The method according to claim 25, characterized in that The target cell includes a serving cell of the first node and / or a neighboring cell of the serving cell of the first node.

29. A covering device, characterized in that: include: Memory and processor; Memory and processor coupling; The memory is used to store instructions executable by the processor; When the processor executes the instructions, the method according to any one of claims 1 to 28 is performed.

30. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer instructions, and when the computer instructions are executed on a computer, the computer is caused to execute the method according to any one of claims 1 to 28.

31. A computer program product, characterized in that The computer program product comprises computer program instructions, which implement the method according to any one of claims 1 to 28 when executed by a processor.

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