Coverage method and apparatus, and storage medium and program product

Abstract

Provided in the embodiments of the present disclosure are a coverage method and apparatus, and a storage medium and a program product. The method comprises: acquiring configuration parameters, the configuration parameters comprising a repeated-transmission parameter for a downlink channel and / or a coverage enhancement parameter for a reference signal; and on the basis of the configuration parameters, performing communication transmission and / or performing measurement.

Description

Coverage methods, devices, storage media and program products

[0001] This disclosure claims priority to Chinese patent application No. 202411566146.2, filed on November 4, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This disclosure relates to the field of communication technology, and in particular to a coverage method, apparatus, storage medium, and program product. Background Technology

[0003] In related technologies, terminals and network devices can connect to 5G networks (or future mobile communication networks) through non-terrestrial devices such as satellites (or aircraft). Summary of the Invention

[0004] This disclosure provides a method, apparatus, storage medium, and program product for covering data.

[0005] On one hand, a coverage method is provided, comprising: acquiring configuration parameters; the configuration parameters including repetition transmission parameters of downlink channels, and / or coverage enhancement parameters of reference signals; performing communication transmission based on the configuration parameters, and / or performing measurements.

[0006] On the other hand, a coverage device is provided, comprising: a communication unit and a processing unit; the communication unit is configured to acquire configuration parameters; the configuration parameters include downlink channel repetition parameters and / or coverage enhancement parameters for a reference signal; the processing unit is configured to perform communication transmission based on the configuration parameters and / or perform measurements.

[0007] In another aspect, 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; the processor executes the computer program to implement the information processing method described in any of the above aspects or embodiments.

[0008] In another aspect, a computer-readable storage medium is provided, on which computer program instructions are stored, which, when executed by a processor, implement the information processing method described in any of the above aspects or embodiments.

[0009] In another aspect, a computer program product is provided, which includes computer program instructions that, when executed by a processor, implement the information processing method described in any of the above aspects or embodiments. Attached Figure Description

[0010] Figure 1 is a schematic diagram of the system architecture of an NTN communication system provided in an embodiment of this disclosure.

[0011] Figure 2 is a schematic diagram of the system architecture of a communication system provided in an embodiment of this disclosure.

[0012] Figure 3 is a flowchart illustrating a coverage method provided in an embodiment of this disclosure.

[0013] Figure 4 is a schematic diagram of the repetition of time-domain resources of DMRS symbols of delayed PDSCH according to an embodiment of this disclosure.

[0014] Figure 5 is a schematic diagram of the time-domain resource repetition of the DMRS symbol of the PDSCH, provided by an embodiment of this disclosure.

[0015] Figure 6 is a schematic diagram of a time-domain resource of DMRS symbols that skips PDSCH being repeatedly transmitted according to an embodiment of this disclosure.

[0016] Figure 7 is a flowchart illustrating another coverage method provided in an embodiment of this disclosure.

[0017] Figure 8 is a schematic diagram of a newly added instruction for multiple SSB periodic parameters in each neighboring cell in an SSB-MTC4 according to an embodiment of this disclosure.

[0018] Figure 9 is a schematic diagram of a downlink time domain resource consisting of a portion of a subframe at the tail of the first system frame and a portion of a subframe at the head of the second system frame, provided in an embodiment of this disclosure.

[0019] Figure 10 is a schematic diagram of a transmission cycle configuration provided by an embodiment of this disclosure.

[0020] Figure 11 is a schematic diagram of another transmission cycle configuration provided by an embodiment of this disclosure.

[0021] Figure 12 is a schematic diagram of a covering device provided in an embodiment of this disclosure.

[0022] Figure 13 is a schematic diagram of the hardware structure of a covering device provided in an embodiment of this disclosure. Detailed Implementation

[0023] The technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the embodiments of this disclosure, and not all embodiments. Based on the embodiments of this disclosure, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the embodiments of this disclosure.

[0024] It should be noted that in the embodiments disclosed herein, the words "exemplarily" or "for example" are used to indicate examples, illustrations, or explanations. Any embodiment or design described as "exemplarily" or "for example" in the embodiments of this disclosure should not be construed as being more preferred or advantageous than other embodiments or design solutions. Specifically, the use of the words "exemplarily" or "for example" is intended to present the relevant concepts by way of example.

[0025] Hereinafter, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature.

[0026] In the description of the embodiments disclosed herein, unless otherwise stated, " / " means "or," for example, A / B can mean A or B. "And / or" in this document is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: only A, only B, and A and B. Furthermore, "at least one" refers to one or more, and "more than one" refers to two or more.

[0027] To facilitate understanding, the relevant technologies involved in the embodiments of this disclosure will be described below.

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

[0029] NTN is a technology that provides communication services to terminals via satellite or other non-terrestrial platforms (such as high-altitude platforms, drones, etc.). NTN communication systems can be integrated with 5G communication systems to provide terminals with more comprehensive network coverage.

[0030] Figure 1 shows a schematic diagram of the NTN communication system architecture. The NTN communication system includes terminals, access network equipment (such as NTN base stations and gateways), and satellites. In some embodiments, 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 within the same cell (terminal 1 and terminal x shown in Figure 1) can use a common link.

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

[0032] The PDCCH SS is used to schedule the physical downlink shared channel (PDSCH). PDSCH scheduling is divided into public scheduling and user-specific scheduling, each using a different PDCCH within its respective SS. Network devices configure the SS for terminals to indicate when the terminal should detect the 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 the NR Specification

[0034] 3. NR NTN

[0035] NR NTN is an extension of 5G (5th Generation Mobile Communication Technology) NR technology, used to improve the coverage of 5G networks through NTN (such as satellite communication networks). In NR NTN, smtc4list is typically used to configure neighboring cells to be measured, establishing a synchronization signal block measurement timing configuration (SMTC) (also known as SSB-MTC) for each neighboring cell. The offset is given by the configuration in smtc4list. However, the measurement period and duration of each synchronization signal block (SSB) in the cell are uniformly given by smtc1. Since the measurement period for each SSB given by smtc1 is the same, it cannot be configured individually.

[0036] The description of smtc4list and SMTC in the protocol is: If smtc4list is present, for cells indicated 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 block measurement timing configuration (SMTC) in accordance with the received offset parameter in each SSB-MTC4configuration and use the duration parameter and periodicity (derived from parameter periodicityAndOffset) from the smtc1 configuration.The first subframe of each SMTC occurs at an SFN and subframe of the NR SpCell meeting the above condition. (If smtc4list exists in MeasObjectNR, then for each SSB-MTC4 element in smtc4list, the UE should set an additional SS / PBCH block measurement time configuration (SMTC) according to the receive 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 periodicityAndOffset parameter). The first subframe of each SMTC timing occurs in the SFN and subframe of the corresponding NR SpCell that satisfy the above conditions.)

[0037] The relevant technologies involved in the embodiments of this disclosure have been described in detail above.

[0038] As discussed above, related technologies can establish 5G network (or future mobile communication network) connections via non-terrestrial devices such as satellites (or aircraft). However, due to satellite payload limitations (e.g., satellite transmit power is typically limited), a gain difference exists between the nadir beam (the beam pointing directly below the ground) and the edge beam (the beam pointing towards the edge of the coverage area), resulting in poorer signal quality for the edge beam. Therefore, downlink coverage enhancement is necessary to improve downlink performance. Furthermore, current wireless systems operate at higher frequencies, leading to more challenging signal propagation conditions and poorer downlink coverage performance, again necessitating downlink coverage enhancement.

[0039] To address the aforementioned technical problems, this disclosure provides a communication system 20, as shown in FIG2. The communication system 20 includes a first node 201 and a second node 202. The second node 202 is used to provide downlink signals for downlink coverage. The first node 201 is used to acquire configuration parameters and enhance downlink coverage based on the configuration parameters.

[0040] In some embodiments, the configuration parameters include downlink channel repetition parameters. After obtaining the downlink channel repetition parameters, the first node 201 receives the downlink signal based on the downlink channel repetition parameters, thereby enhancing the downlink signal.

[0041] In some other embodiments, the configuration parameters include coverage enhancement parameters for the reference signal. After obtaining the coverage enhancement parameters for the reference signal, the first node 201 measures the reference signal based on the coverage enhancement parameters, thereby improving the measurement effect of the reference signal and thus enhancing the downlink coverage.

[0042] The coverage method provided in this disclosure can be applied to systems with various communication standards. For example, the systems to which the coverage method provided in this disclosure is applicable include, but are not limited to, long-term evolution (LTE) systems, various versions of LTE-based systems, 5G systems, future mobile communication networks, or converged communication systems. Furthermore, the coverage method provided in this disclosure can also be applied to future-oriented communication systems.

[0043] For example, referring to Figure 2 above, the first node 201 can be a terminal, such as an IoT device, a mobile phone, or an in-vehicle device. The second node 202 can be a master terminal in a direct communication scenario between a base station or terminal (device-to-device or sidelink communication), such as a communication base station, a sensing base station, or a non-ground device, such as a satellite, a high-altitude platform, or a drone.

[0044] In some embodiments, the terminal can be a device with wireless transceiver capabilities, which can be deployed on land, including indoors or outdoors, handheld, wearable, or vehicle-mounted; it can also be deployed on water (such as on ships); and it can also be deployed in the air (e.g., on airplanes, balloons, and satellites). The terminal can be a mobile phone, tablet computer, computer with wireless transceiver capabilities, virtual reality (VR) terminal, augmented reality (AR) terminal, wireless terminal in industrial control, wireless terminal in self-driving, wireless terminal in remote medical care, wireless terminal in smart grid, wireless terminal in transportation safety, wireless terminal in smart city, wireless terminal in smart home, etc. The embodiments disclosed herein do not limit the application scenarios. The terminal may 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 device, UE agent, or UE device, etc., and the embodiments disclosed herein are not limited to these terms.

[0045] In some embodiments, the base station may be a base station in Long Term Evolution (LTE), Long Term Evolution Advanced (LTE-A), or an evolved Node B (eNB or eNodeB), a base station device in a 5G network, or a base station in a future communication system. The base station may include various macro base stations, micro base stations, femtocell base stations, wireless remote extensions, reconfigurable intelligent surfaces (RISs), routers, wireless fidelity (Wi-Fi) devices, or various network-side devices such as primary cells and secondary cells.

[0046] This disclosure also provides an overlay method that can be applied to the communication system shown in FIG2. The overlay method provided by this disclosure will be described in detail below with reference to FIG3. This overlay method can be applied to a first node in the communication system shown in FIG2. The first node is used to obtain configuration parameters and perform overlay enhancement based on the obtained configuration parameters. As shown in FIG3, the overlay method includes steps 301 to 302.

[0047] Step 301: The first node obtains the configuration parameters.

[0048] Configuration parameters include downlink channel repetition parameters and / or reference signal coverage enhancement parameters.

[0049] In some embodiments, configuration parameters can be predefined. For example, the content of configuration parameters can be defined in a relevant protocol or specification. If the terminal supports the protocol or specification, the terminal can determine the configuration parameters based on that protocol or specification.

[0050] In other embodiments, the configuration parameters may be configuration parameters indicated by a second node (or other node) to a first node. As an example, the second node sends configuration parameter indication information to the first node to indicate repetition parameters for the downlink channel and / or coverage enhancement parameters for the reference signal.

[0051] It should be noted that the first node can also obtain configuration parameters through other means, and this disclosure does not limit this.

[0052] Step 302: The first node performs communication transmission and / or measurement based on the configuration parameters.

[0053] In some embodiments, when the configuration parameters include the repetition parameters of the downlink channel, after the first node obtains the repetition parameters of the downlink channel, it receives the downlink signal based on the repetition parameters of the downlink channel, thereby enhancing the downlink signal.

[0054] In some other embodiments, when the configuration parameters include coverage enhancement parameters for the reference signal, after the first node obtains the coverage enhancement parameters for the reference signal, it measures the reference signal based on the coverage enhancement parameters for the reference signal, thereby improving the measurement effect of the reference signal and thus achieving downlink coverage enhancement.

[0055] In some other embodiments, when the configuration parameters include time division duplexing (TDD) coverage enhancement parameters, after the first node obtains the TDD coverage enhancement parameters, it receives downlink transmission data based on the TDD coverage enhancement parameters, thereby improving the transmission quality of downlink transmission and thus achieving downlink coverage enhancement.

[0056] This disclosure also provides a coverage method in which a first node acquires configuration parameters; the configuration parameters include repetition transmission parameters for the downlink channel and / or coverage enhancement parameters for a reference signal; communication transmission is performed based on the configuration parameters, and / or measurements are taken. In this way, the first node can enhance downlink coverage based on the repetition transmission parameters for the downlink channel and / or the coverage enhancement parameters for the reference signal, thereby improving downlink coverage capability.

[0057] In the embodiments of this disclosure, the configuration parameters include downlink channel repetition parameters and / or reference signal coverage enhancement parameters. The following provides detailed descriptions of the downlink channel repetition parameters (described as Scenario 1), the reference signal coverage enhancement parameters (described as Scenario 2), and the TDD coverage enhancement parameters (described as Scenario 3).

[0058] Scenario 1: Repetitive transmission parameters of downlink channel

[0059] Repetitive transmission parameters in downlink channels are typically used for link-level coverage enhancement. For example, in NTN scenarios, since the link budget is limited by satellite transmit power and propagation path loss, link-level enhancement of the downlink channel is an effective method to improve coverage. Link-level enhancement can use repetitive transmissions to accumulate energy in the time domain, thereby increasing the link budget margin.

[0060] In this embodiment, the terminal obtains configuration parameters to determine the retransmission status of the downlink channel, such as whether the downlink channel is retransmitted, the number of retransmissions, and the transmission resources required for retransmissions. After obtaining these parameters, the terminal monitors the retransmitted downlink channel based on them, thereby improving the link performance of the downlink channel and thus enhancing its coverage.

[0061] 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.

[0062] The following sections provide detailed explanations of the repetitive transmission parameters for the downlink control channel (described as scenario 1.1) and the repetitive transmission parameters for the downlink data channel (described as scenario 1.2).

[0063] Scenario 1.1, Repetitive Transmission Parameters of Downlink Control Channel

[0064] Based on the above description of the PDCCH search space in related technologies, it is clear that in the current downlink transmission process, different search spaces are needed to schedule the PDSCH according to the PDCCH. Therefore, to ensure downlink coverage performance, the coverage capability of the PDCCH needs to meet the requirements. In this case, the downlink control channel (such as the PDCCH) can be repeatedly transmitted to enhance its coverage capability. When repeatedly transmitting the downlink control channel, the retransmission parameters include at least one of the following: whether to repeatedly transmit the downlink control channel, the number of times the downlink control channel is repeatedly transmitted, and the transmission resources used for retransmitting the downlink control channel.

[0065] As one implementation, the repetition parameters of the downlink control channel are determined based on at least one of the following:

[0066] a) Predefine the repetitive transmission parameters of the downlink control channel for different types of networks.

[0067] Alternatively, b) determine the repetitive transmission parameters of the downlink control channel based on the first indication information of the second node.

[0068] For the aforementioned a) predefined downlink control channel repetition parameters corresponding to different types of networks, at least one of the following is included:

[0069] A predefined downlink control channel that is repeatedly transmitted in a specific network scenario.

[0070] The number of times the downlink control channel is retransmitted in a specific network scenario is predefined.

[0071] Predefine transmission resources for repeated transmission of downlink control channels in specific network scenarios.

[0072] In other words, in this embodiment of the disclosure, the retransmission parameters of the downlink control channel under various network scenarios can be defined in relevant protocols or specifications. For example, the communication protocol can define whether to retransmit the downlink control channel, the number of times the downlink control channel is retransmitted, and the transmission resources used for retransmitting the downlink control channel.

[0073] In some embodiments, the specific network scenario described above is an NTN network scenario or a TN high-frequency network scenario.

[0074] As an example, for Type0-PDCCH CSS (a common search space configuration for transmitting control information, particularly control information related to system information (SI)), in an NTN scenario, the Type0-PDCCH CSS is repeatedly transmitted N times. The repetitive time-frequency resources can be predefined as the same time-frequency resources on N consecutive time slots, where N is a positive integer. For example, in the case of repetitive transmission of Type0-PDCCH CSS twice, approximately 3 dB of time-domain energy accumulation can be achieved. In some embodiments, the first node can determine whether it is in an NTN scenario based on conditions such as frequency band, terminal type, network type, and / or geographical location.

[0075] In some embodiments, the transmission resources for repeatedly transmitting the downlink control channel include N common search spaces (CSSs), where the N CSSs are the same time-frequency resources on N consecutive time slots. In other words, the transmission resources for repeatedly transmitting the downlink control channel can be the same time-frequency resources on N consecutive time slots.

[0076] In some other embodiments, the transmission resources for repeatedly transmitting the downlink control channel include a symbol set of N consecutive CORESET lengths.

[0077] It should be noted that if a symbol set of N consecutive CORESET lengths overlaps with the time-frequency resources of other signals (e.g., DMRS symbols of PDSCH), the transmission resources for repeatedly transmitting the downlink control channel can also be determined using the following method:

[0078] The DMRS symbols of the PDSCH are delayed until after the time-domain resources of the aforementioned symbol set of N consecutive CORESET lengths. Figure 4 illustrates a method for repeating the time-domain resources of delayed PDSCH DMRS symbols according to an embodiment of this disclosure; taking N=2 as an example, the DMRS symbols of the PDSCH are delayed from the original OFDM symbol #2 to OFDM symbol #4 to avoid the aforementioned symbol set of two consecutive CORESET lengths. The symbol set of two consecutive CORESET lengths used for repeated transmission of the downlink control channel occupies OFDM symbols #0 to #3.

[0079] Alternatively, the DMRS symbols of the PDSCH can be discarded, canceled, or not transmitted. Figure 5 illustrates a schematic diagram of time-domain resource duplication for canceling the DMRS symbols of the PDSCH according to an embodiment of this disclosure; taking N=2 as an example, the DMRS symbols of the PDSCH are not transmitted to avoid the aforementioned symbol set of two consecutive CORESET lengths. The symbol set of two consecutive CORESET lengths used for duplicating the downlink control channel occupies OFDM symbols #0 to #3.

[0080] In some other embodiments, the transmission resources for repeatedly transmitting the downlink control channel include a symbol set of N consecutive available CORESET lengths.

[0081] In some other embodiments, the transmission resources 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.

[0082] In some other embodiments, the transmission resources for repeatedly transmitting the downlink control channel include N intervals of time-domain resources, where the interval or offset between two adjacent time-domain resources used for repeated transmission is X symbols, time slots, subframes, or milliseconds. Here, the interval or offset may refer to the start time offset between 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, where X can be any positive integer.

[0083] In some other embodiments, the transmission resources for repeatedly transmitting the downlink control channel include N intervals of time-domain resources, where the interval / offset between two adjacent time-domain resources is X symbols, time slots, subframes, or milliseconds, and X can be any positive integer.

[0084] In some embodiments, when downlink control channel transmission or retransmission is performed using multiple time-domain resources, the timing relationship or scheduling is based on the first time-domain resource or retransmission. In still other embodiments, when downlink control channel transmission or retransmission is performed using multiple time-domain resources, the timing relationship or scheduling is based on the last time-domain resource or retransmission. In yet other embodiments, when downlink control channel transmission or retransmission is performed using multiple time-domain resources, data transmission is scheduled once for each time-domain resource or retransmission.

[0085] As an example, in this embodiment of the disclosure, time-frequency resources that do not overlap with time-frequency resources of other signals (e.g., DMRS symbols of PDSCH) are considered usable time-frequency resources. When time-frequency resources overlap with those of other signals, the time-frequency resources of those other signals are skipped. Figure 6 illustrates a schematic diagram of skipping the repetition of time-domain resources of DMRS symbols of PDSCH according to an embodiment of the disclosure; taking N=2 as an example, the DMRS symbols of PDSCH include OFDM symbol #2. In this case, the second available CORESET length symbol set in two consecutive available CORESET length symbol sets starts from OFDM symbol #3 to avoid the DMRS symbols of PDSCH (i.e., OFDM symbol #2).

[0086] It should be noted that the time-frequency resources that are the same in multiple time slots in this embodiment can be transmission resources in which both the symbol resources in the time domain and the frequency domain resources are the same in one time slot.

[0087] Regarding the scenario described in b) where the repetition parameters of the downlink control channel are determined based on the first indication information from the second node, the second node determines the repetition parameters of the downlink control channel from the first node and generates first indication information, which is then sent to the first node. Upon receiving the first indication information, the first node determines the repetition parameters of the downlink control channel based on that information.

[0088] In some embodiments, the first indication information is carried in a downlink signaling message transmitted prior to the downlink control channel. In some embodiments, the downlink signaling message may be a master information block (MIB) message.

[0089] In one possible implementation, the number of retransmissions of the downlink control channel can be preset or indicated by the first indication information. In other words, the number of retransmissions of the downlink control channel is preset; or, the value of the number of retransmissions of the downlink control channel is indicated by the first indication information; or, the index value of the number of retransmissions of the downlink control channel in the transmission count set is indicated by the first indication information.

[0090] In one implementation, when the retransmission parameters of the downlink control channel are determined based on the first indication information of the second node, the second node indicates in the downlink signal (denoted as the first downlink signal) before the retransmission of the downlink control channel whether the downlink control signal is retransmitted, the number of retransmissions, and the retransmission resources, etc. After receiving the first downlink signal, the first node parses the first downlink signal to determine the retransmission parameters of the downlink control signal.

[0091] As an example, for Type 0-PDCCH CSS, the second node re-carries the first indication information based on the MIB message prior to the retransmission of the downlink control channel. In other words, the second node indicates the retransmission parameters of the downlink control signal to the first node through the MIB message prior to the retransmission of the downlink control channel.

[0092] Regarding whether to repeat the transmission and the number of repetitions in the repeated transmission parameters, the first indication information can be indicated by any one of the following methods 1-3.

[0093] Method 1: By indicating whether repeated transmission is allowed, and by predefining the number of repeated transmissions. As an example, a 1-bit flag, "enable / disable bit flag," is added to the MIB message. When this bit is 0, it indicates that Type0-PDCCH CSS is not repeatedly transmitted. When this bit is 1, it indicates that Type0-PDCCH CSS is repeatedly transmitted, and the number of repetitions is a predefined value. For example, the predefined value can be a positive integer such as 2 or 4; in other words, the number of repeated transmissions of Type0-PDCCH CSS is 2 times, or 4 times, or a positive integer.

[0094] Method 2: Directly indicate the number of repetitions. As an example, a 2-bit information field is added to the MIB to indicate the number of repetitions. A value of "00" indicates 0 repetitions for the Type0-PDCCH CSS; "01" indicates 1 repetition; "10" indicates 2 repetitions; and "11" indicates 3 repetitions. Furthermore, more bits can be set to indicate a larger number of repetitions.

[0095] Method 3: Indicating the index of the repetition count. As an example, a predefined set of repetition counts is {0, 2, 4, 8}. A 2-bit information field is added to the MIB to indicate the index of the repetition count in the predefined set. For example, when the information field value is "00", it corresponds to the first repetition count in the set, i.e., repetition count 0, and the Type0-PDCCH CSS is repetitive 0 times; when the information field value is "01", it corresponds to the second repetition count, i.e., repetition count 2, and the Type0-PDCCH CSS is repetitive 2 times; when the information field value is "10", it corresponds to the third repetition count, i.e., repetition count 4, and the Type0-PDCCH CSS is repetitive 4 times; when the information field value is "11", it corresponds to the fourth repetition count, i.e., repetition count 8, and the Type0-PDCCH CSS is repetitive 8 times.

[0096] For the repeated transmission resources in the repeated transmission parameters, the first indication information can be indicated in the following manner.

[0097] A 1-bit information field is added to the MIB message. When this field is 0, it indicates that there is no repeated transmission of Type0-PDCCH CSS, and therefore no corresponding repeated transmission resources. When this field is 1, it indicates that Type0-PDCCH CSS is transmitted N times, and the time-frequency resource for repeated transmission of Type0-PDCCH CSS is N consecutive CSSs. In some embodiments, these N CSSs constitute a repetition cycle, the starting boundary of which is calculated from the update cycle boundary of the MIB.

[0098] It should be noted that, in the embodiments of this disclosure, the repetition transmission parameters of the downlink control channel can be predefined repetition parameters for different types of SS, and this disclosure does not limit them.

[0099] In some embodiments, the aforementioned repeated transmission of the downlink control channel can be based on the existing downlink control information (DCI) format, and the PDCCH is enhanced based on this repeated transmission.

[0100] In this embodiment of the disclosure, repeated transmissions can also be performed based on the new DCI format, thereby achieving enhanced coverage of the PDCCH.

[0101] In some embodiments, the size of the DCI in the PDCCH payload can be reduced by optimizing the format or payload of the DCI, thereby reducing the bit rate of the PDCCH and thus achieving enhanced coverage of the PDCCH.

[0102] The methods for optimizing the DCI format mentioned above include, but are not limited to, at least one of the following:

[0103] Reduce the size of the DCI format; for example, reduce the number of bits in the DCI format. As an example, delete or omit certain bit fields in the DCI format. These bit fields can be reserved bits. For example, for DCI in Type 0-PDCCH CSS, and / or DCI scrambled by SI-RNTI, delete or omit the reserved bits.

[0104] Alternatively, define a new DCI format with fewer bits than the existing DCI format.

[0105] Alternatively, the DCI can be transmitted in segments; for example, portions of the DCI can be transmitted separately in different PDCCHs. The method of segmenting the DCI can be predefined in the protocol or specification, or it can be indicated by downlink signals in the PDCCH prior to the transmission of the DCI. In some embodiments, 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.

[0106] In the case of defining a new DCI format as described above, a new signaling message can be used to indicate to the terminal whether to use the new DCI format, or to indicate the conditions for using the new DCI format. In some embodiments, the conditions for using the new DCI format include, but are not limited to, at least one of the following:

[0107] Configure the RSRP threshold so that the new DCI format described above is used when RSRP is less than or equal to the threshold.

[0108] Alternatively, configure the PDCCH / DCI categories to which the new DCI format applies, for example, the new DCI format applies to Type0-PDCCH and Type0A-PDCCH.

[0109] Alternatively, configure the new DCI format to apply the RNTI scrambled PDCCH / DCI category, for example, the new DCI format applies to PDCCH / DCI scrambled with SI-RNTI and TC-RNTI, etc.

[0110] Alternatively, configure the new DCI format to apply to the search space SS or control resource set CORESET, for example, the new DCI format applies to the PDCCH / DCI on SS0 and CORESET0.

[0111] It should be noted that the search space SS or control resource set CORESET corresponding to the new DCI format can also be predefined.

[0112] In the case of segmented DCI transmission described above, it is necessary to instruct the terminal on the configuration related to segmented DCI transmission. The configuration related to segmented DCI transmission includes, but is not limited to, at least one of the following: number of segments, size of each segment, resources of the starting segment, resources of different segments, and intervals between different segments (e.g., time offset, frequency offset, detection timing offset).

[0113] Methods for instructing terminals on configurations related to segmented transmission DCI include:

[0114] Predefine the configurations related to segmented transmission DCI in the protocol or specification.

[0115] Alternatively, the configuration related to segmented DCI transmission can be indicated in the downlink signals of the PDCCH prior to DCI transmission. For example, for Type 0-PDCCH CSS, this indication can be carried in the MIB, MIB-NB, PBCH, and / or NPBCH. As another example, for Type 0A-PDCCH CSS / Type 1-PDCCH, CSS / Type 1A-PDCCH, CSS / Type 2-PDCCH, and / or CSS / Type 2A-PDCCH CSS, this indication can be carried in SIB1, and / or SIB1-NB. As yet another example, for Type 3-PDCCH CSS, and / or PDCCH USS, this indication can be carried in SIB1, SIB1-NB, SIBx, radio resource control (RRC) signaling, and / or media access control element (MAC CE) signaling, where x is any positive integer.

[0116] It should be noted that in the embodiments of this disclosure, repeat transmission based on the existing DCI format can be used alone, repeat transmission based on the new DCI format can be used alone, or repeat transmission based on the existing DCI format and repeat transmission based on the new DCI format can be used simultaneously. How to use repeat transmission based on the DCI format can be indicated by instruction information or predefined by a protocol or specification. For example, activation (use) conditions can be set separately for repeat transmission based on the existing DCI format and repeat transmission based on the new DCI format. When one mode is activated, the activated mode is used for PDCCH repeat transmission; when both modes are activated, both modes are used for PDCCH repeat transmission.

[0117] Scenario 1.2, Repetitive Transmission Parameters of Downlink Data Channel

[0118] In related technologies, the common channels that support PDSCH transmission (collectively referred to as commonPDSCH) include system information, downlink messages related to random access procedures, paging, etc. CommonPDSCH names include, but are not limited to, at least one of the following: Msg2 (message 2), Msg4 (message 4), MsgB (message B), paging (paging message), and groupcommonPDSCH (group common channel). The radio network temporary identifier (RNTI) types associated with commonPDSCH include at least the following: 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 (INT-RNTI), and Scheduling Request Radio Network Temporary Identifier (INT-RNTI). identifier, SR-RNTI),The following are temporary identifiers for radio networks: Slot Format Indication (SFI-RNTI), Transmit Power Control-Physical Uplink Shared Channel (TPC-PUSCH-RNTI), Transmit Power Control-Physical Uplink Control Channel (TPC-PUCCH-RNTI), Transmit Power Control-Sounding Reference Signal (TPC-SRS-RNTI), Connection Indication (CI-RNTI), Cell Discontinuous Transmission and Reception (CDRX-RNTI), Modulation and Coding Scheme (MCS-C-RNTI), and Semi-Persistent Scheduling (SSC-RNTI). temporary identifier, SPS-RNTI). ,

[0119] Since these public channels are monitored by non-connected (non-RC_CONNECTED) terminals, if repeated transmissions are performed on these channels, the terminal needs to determine the repeated transmission method so that the terminal can monitor the repeated transmission channels based on the repeated transmission method.

[0120] 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:

[0121] c) Determined based on the downlink control channel of the scheduling downlink data channel.

[0122] d) Determined based on the third indication information of other downlink data channels besides the downlink data channel.

[0123] Regarding c) above, it is determined based on the downlink control channel of the scheduling downlink data channel; if the downlink control channel of the scheduling downlink data channel is repeatedly transmitted, then the downlink data channel is repeatedly transmitted, and the number of times the downlink data channel is repeatedly transmitted is determined based on the number of times the downlink control channel is repeatedly transmitted.

[0124] In some embodiments, when the downlink control channel of the scheduled downlink data channel is transmitted repeatedly, the downlink data channel is also transmitted repeatedly; when the downlink control channel of the scheduled downlink data channel is not transmitted repeatedly, the downlink data channel is not transmitted repeatedly. As an example, for SIB1, if the Type0-PDCCH CSS of SIB1 is transmitted repeatedly, then SIB1 is also transmitted repeatedly.

[0125] In some other embodiments, when the number of repetitions of the downlink data channel is determined based on 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:

[0126] The number of retransmissions in the downlink data channel is equal to the number of retransmissions in the downlink control channel.

[0127] Alternatively, the number of repetitions of the downlink data channel is equal to the product or ratio of the number of repetitions 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 SIB1 is 2, then the number of repetitions of SIB1 is 2*M, where M is a positive integer.

[0128] Alternatively, the number of retransmissions on the downlink data channel is equal to the sum or difference between the number of retransmissions on the downlink control channel and the second value. As an example, for SIB1, if the retransmission count of the Type0-PDCCH CSS scheduled for SIB1 is 2, then the retransmission count of SIB1 is 2 + L, where L is a positive integer. It should be noted that in this case, if the Type0-PDCCH CSS scheduled for SIB1 is a non-retransmission, then the retransmission count of SIB1 is L.

[0129] In some embodiments, the first value and / or the second value are preset; or, the first value and / or the second value are indicated by second indication information; the second indication information is carried in a message preceding the downlink data channel.

[0130] In some embodiments, when the first value and / or the second value are preset, 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.

[0131] In some embodiments, where the first and / or second values ​​are indicated by second indication information, the first and / or second values ​​can be indicated through downlink data channels other than the downlink data channels. For example, the first and / or second values ​​can be indicated in the downlink signal prior to the PDSCH. As an example, for SIB1, the magnitude of the first and / or second values, or the index of the first and / or second values, can be indicated through specific information fields in the MIB message.

[0132] Regarding the case described above (d), where the determination is based on the third indication information of downlink data channels other than the downlink data channel, the other downlink data channels include: the determination of the third indication information of downlink data channels scheduled before the downlink data channel.

[0133] For example, the number of repetitions of Msg4 in PDSCH can be indicated by Msg2 (such as the random access response (RAR) in Msg2). In some embodiments, the third indication information can be 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 transmit power control (TPC) command; the reserved bit field of the media access control random access response (MAC RAR) field, or the time advance code (TAC) field.

[0134] As an example, when reusing the existing bits in the RAR UL grant field of Msg2 to indicate the repetition count of Msg4, since a larger MCS is less likely to be used in coverage enhancement scenarios, some bits in the MCS field may be freed up. Therefore, the repetition count of Msg4 can be indicated by the highest or lowest 1 or 2 bits in the MCS field. Alternatively, the repetition count of Msg4 can be indicated by the PUSCH frequency resource allocation field. Or, the repetition count of Msg4 can be indicated by the PUSCH time resource allocation field. Or, the repetition count of Msg4 can be indicated by the TPC command for PUSCH.

[0135] As another example, when reusing existing bits in the MAC RAR of Msg2 to indicate the number of repetitions of Msg4, the number of repetitions of Msg4 can be indicated by the Reserved bit field. Alternatively, the number of repetitions of Msg4 can be indicated by the TAC field.

[0136] It should be noted that the above explanation is for the case of repeated parameters indicating PDSCH. For PUSCH (e.g., msg5), a similar method can be used to determine it, and this disclosure will not elaborate on this.

[0137] In some embodiments, repeated transmission of downlink data channels, such as Msg4, can be achieved through Hybrid Automatic Repeat reQuest (HARQ). In this case, with each additional repetition, the user's receive delay increases by the Round Trip Time (RTT) or the Timing Advance (TA). For Msg4, the user needs to successfully receive the data before the contention resolution timer expires. Therefore, when using HARQ retransmission to achieve repeated transmission, the contention resolution timer needs to be extended. The extension length can be configured on the network side, for example, by directly configuring the extended timer length, or by setting the timer's extension length / offset, or by the user automatically extending the contention resolution timer based on the number of repetitions and the RTT / TA (e.g., extending it by N*T, where N is the number of repetitions and T is the RTT / TA).

[0138] In some embodiments, the transmission resources for repeated transmission of the downlink data channel are determined according to at least one of the following:

[0139] Determined based on the indication of the downlink control channel for scheduling the downlink data channel.

[0140] Alternatively, it can be determined based on the preset transmission resources used for repeated transmission of downlink data channels.

[0141] Alternatively, it can be determined based on the third instruction information sent by the second node.

[0142] As one implementation, when the transmission resources for repeated transmissions of the downlink data channel are determined according to the indication of the 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 P-1 consecutive time slots after the time-frequency resources, where P is a positive integer.

[0143] As one implementation, if determined based on the third indication information sent by the second node, the third indication information is carried on the downlink data channel transmitted before the downlink data channel. The understanding of the third indication information can be referred to the above description, and this disclosure does not limit it.

[0144] The repetitive transmission parameters of the downlink channel have been explained in detail above.

[0145] Scenario 2: Coverage enhancement parameters for the reference signal

[0146] The coverage enhancement parameters of the reference signal are typically applicable to beam-level coverage enhancement. In NTN and high-frequency terrestrial networks, beam scanning (or hopping beams) can be used to serve a larger area with a limited number of concurrent beams. For example, current NR supports 4 to 64 SSBs within a cell for directional scanning, using multiple beams to serve terminals in different directions. As another example, in current satellite systems, multiple concurrent beams simultaneously serve terminals in different geographical locations. Currently, the periods of multiple SSBs within a single cell are the same. Considering that the number of concurrent beams is less than the area to be covered, the current maximum SSB period is 160ms, which may not be sufficient to complete a full coverage area beam scan within one period. Therefore, embodiments of this disclosure can extend the period of the downlink common signal. Furthermore, since different beams may serve areas with different service loads, for example, the terminal density in the coverage areas of multiple satellite beams may vary significantly. Using different measurement periods for multiple SSBs within the same cell can improve the beam scanning effect. Therefore, embodiments of this disclosure can set different measurement periods for different SSBs to achieve downlink coverage enhancement.

[0147] In scenario 2, referring to Figure 3 and as shown in Figure 7, step 301 above can be achieved through the following steps 701:

[0148] Step 701: The first node receives the fourth instruction information.

[0149] The fourth indication information is used to indicate the coverage enhancement parameters of the reference signal.

[0150] In some embodiments, the reference signal is a synchronization signal block (SSB) or a channel state information reference signal (CSI-RS). In this disclosure, the example of a synchronization signal block (SSB) as the reference signal is mainly used for illustration.

[0151] As one implementation, when the reference signal is a synchronization signal block, the fourth indication information is carried in the synchronization signal block measurement timing configuration message.

[0152] In some embodiments, the coverage enhancement parameters of the reference signal include multiple synchronization signal block measurement periods of the target cell, each synchronization signal block measurement period corresponding to one or more synchronization signal blocks.

[0153] In one 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.

[0154] In some embodiments, the fourth indication information indicates a synchronization signal block based on at least one of the following: the index of the synchronization signal block; the index of the synchronization signal block group to which the synchronization signal block belongs; the index of the boundary synchronization signal block of the synchronization signal block group to which the synchronization signal block belongs; 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 boundary synchronization signal block is the synchronization signal block with the largest and / or smallest index value in the synchronization signal block group.

[0155] In some embodiments, the target cell includes the serving cell of the first node and / or the neighboring cells of the serving cell of the first node.

[0156] The coverage enhancement parameters of the aforementioned reference signal are explained below with examples. In related technologies, network devices can send RRM measurement configuration to terminals via measObjectNR. The RRM measurement configuration includes smtc1 (also denoted as SSB-MTC) to indicate the measurement period, frequency shift, and measurement duration.

[0157] As an example, the content of SSB-MTC is as follows:

[0158] In this embodiment of the disclosure, the SSB period can be extended. When extending the SSB period, it is necessary to update the value range of some information elements (IEs) in SSB-MTC, such as periodicityAndOffset.

[0159] As an example 1, the SSB cycle is extended by adding two new SSB cycles: {320ms, 640ms}. The updated SSB-MTC content is as follows:

[0160] Based on Example 1 above, two new SSB periods of 320ms and 640ms have been added to the periodicityAndOffset of SSB-MTC. The current maximum SSB period of 160ms has been extended to a maximum period of 640ms. This allows beam scanning of the coverage area to be completed within one period, even when the number of concurrent beams is less than the area to be covered.

[0161] In some embodiments, the coverage enhancement parameters of the reference signal include multiple synchronization signal block measurement periods of the target cell, each synchronization signal block measurement period corresponding to one or more synchronization signal blocks. The fourth indication information is used to indicate the synchronization signal blocks corresponding to each synchronization signal block measurement period of the target cell; or, the fourth indication information is used to indicate the synchronization signal blocks corresponding to the target synchronization signal block measurement period of the target cell.

[0162] As an example 2, building upon Example 1 above, this example extends the SSB cycle by adding SSB grouping and corresponding measurement cycle indications for each SSB group. Taking the division of SSBs into two groups, one corresponding to high-load coverage areas and the other to low-load coverage areas, as an example, the SSB-MTC content is as follows:

[0163] The "SsbInfo" field mentioned above is a newly added field used to indicate SSBs (such as SSB grouping). In some embodiments, this field can also indicate the correspondence between SSB groups and measurement periods. periodicityAndOffset1 is the configuration for the first set of measurement periods for the cell, and periodicityAndOffset1 is the configuration for the second set of measurement periods for the cell.

[0164] Referring to Example 2 above, when the fourth indication information indicates the correspondence between measurement periods and SSBs, it can indicate the synchronization signal block corresponding to the target synchronization signal block measurement period of the target cell. For example, the fourth indication information indicates the index of the SSB corresponding to the first set of measurement periods. Since only two measurement periods were divided in Example 2 above, after indicating the SSB corresponding to one set of measurement periods, it can be assumed that other SSBs use the second set of measurement periods. Alternatively, the SSB index corresponding to the second set of measurement periods can be indicated, and other SSBs can use the first set of measurement periods.

[0165] In conjunction with Example 2 above, when the fourth indication information indicates the correspondence between measurement periods and SSBs, 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 indicates the index of the SSB corresponding to the first set of measurement periods and the index of the SSB corresponding to the second set of measurement periods, respectively. In some embodiments, the intersection of the indexes of the SSBs corresponding to the first set of measurement periods and the indexes of the SSBs corresponding to the second set of measurement periods is an empty set; the union of the indexes of the SSBs corresponding to the first set of measurement periods and the indexes of the SSBs corresponding to the second set of measurement periods is the index of all SSBs transmitted by the cell.

[0166] In one possible implementation, the fourth indication information indicates the synchronization signal block based on at least one of the following: the index of the synchronization signal block; the index of the synchronization signal block group to which the synchronization signal block belongs; 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; 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.

[0167] Based on Example 2 above, the fourth indication information can indicate synchronization signal blocks in the form of a Bitmap. For example, if a cell has 8 SSBs, and the SSBs are divided into 2 groups, then the fourth indication information uses 8 bits to represent the grouping of each SSB. Taking "00001111" as an example, the first 4 "0"s indicate that SSB indices 0-3 use periodicityAndOffset1, and the last 4 "1"s indicate that SSB indices 4-7 use periodicityAndOffset2.

[0168] Alternatively, the fourth indication information can indicate synchronization signal blocks in the form of an SSB index list. For example, if a cell has 8 SSBs, and the SSBs are divided into 2 groups, then the fourth indication information can use {0, 1, 2, 3} to represent the first group, indicating that SSB indices 0-3 use periodicityAndOffset1. Since the SSBs are only divided into 2 groups, the other SSB indices besides SSB indices 0-3 use periodicityAndOffset2.

[0169] If the SSB is divided into 3 groups, the corresponding cell measurement period configuration 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 indices 0-3 use periodicityAndOffset1; {4, 5} can be used to represent the second group, indicating that SSB indices 4-5 use periodicityAndOffset2. Since the SSB is only divided into 3 groups, the remaining SSB indices use periodicityAndOffset3.

[0170] Alternatively, the fourth indication information indicates the synchronization signal block in the form of SSB index boundaries. For example, a cell has 8 SSBs, and the SSBs are divided into 2 groups. The fourth indication information can use {3} to represent the last SSB index in the first group, where the SSB indexes included in the first group range from the first actually transmitted SSB index to the last SSB index (i.e., up to the SSB index with index 3). For example, if the first actually transmitted SSB index is 0, then the first group contains SSB indices {0, 1, 2, 3}, which use periodicityAndOffset1. The remaining SSB indices use periodicityAndOffset2.

[0171] If the SSBs are divided into 3 groups, the corresponding cell measurement period configuration includes: periodicityAndOffset1, periodicityAndOffset2, and periodicityAndOffset3. The fourth indication information can use {3, 5} to represent the last SSB index in the first and second groups. The SSB indexes included in the first group range from the first actually transmitted SSB index to the last SSB index of the corresponding first group. For example, if the first actually transmitted SSB index is 0, then the first group contains SSB indexes {0, 1, 2, 3}, and the first group uses periodicityAndOffset1. The SSB indexes included in the second group range from the first actually transmitted SSB index after the last SSB index of the first group to the last SSB index of the corresponding second group, using periodicityAndOffset2. For example, if the first actually transmitted SSB index in the second group is 4, then the first group contains SSB indexes {4, 5}. The remaining SSB indexes use periodicityAndOffset3.

[0172] 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 can also indicate the first SSB index of each packet. This disclosure does not limit this.

[0173] In one possible implementation, the SSB-MTC in Examples 1 and 2 above can be applied to the configuration of measurements for this cell.

[0174] When configuring neighboring cells, the measurement configuration of neighboring cells can be configured for the terminal through smtc4. At this time, the measurement cycle and measurement duration in smtc1 (such as Example 1 and Example 2 above) can be reused.

[0175] As an example, in related technologies, the content of smtc4 is as follows:

[0176] In this embodiment of the disclosure, the SSB period of neighboring cells can be extended. When extending the SSB period, the offset portion of smtc4 needs to be updated. As an example, when the SSB measurement period is extended by adding two measurement periods {320ms, 640ms}, the value range field of offset in smtc4 is updated.

[0177] As an example 3, the updated content of this field is:

[0178] offset INTEGER(0…639)

[0179] Furthermore, to indicate the different measurement periods corresponding to multiple SSBs in each neighboring cell, SSB-MTC4 needs to add a new information field indicating the period parameters of multiple SSBs in each neighboring cell. The architecture of the required new information is shown in Figure 8. The required new information includes N SSB groups for each neighboring cell, and the measurement period or offset corresponding to each SSB group.

[0180] As an example 4, the SSB measurement period is extended by adding two values: {320ms, 640ms}. There are M neighboring cells, and the SSB of each neighboring cell is divided into at most N groups, with each group corresponding to one measurement period. Taking N as an example with a value of 2, the updated smtc4 content is as follows:

[0181] SSB-MTC4::=SEQUENCE{

[0182] pci-List SEQUENCE(SIZE(1..maxNrofPCIsPerSMTC))OF PhysCellId

[0183] ...corresponding to M neighboring cells, M = maxNrofPCIsPerSMTC

[0184] ssbInfoPerPci-List SEQUENCE(SIZE(1..maxNrofPCIsPerSMTC))OF SsbInfoPerPci ... corresponds to the SSB packets of M neighboring cells

[0185] periodicityAndOffset-List SEQUENCE(SIZE(1..maxNrofPCIsPerSMTC*maxNrofSsbGroupPerPci))OF periodicityAndOffset

[0186] ...corresponding to a maximum of M neighboring cells, with each neighboring cell having a maximum of N SSB packets in terms of period and offset.

[0187] duration ENUMERATED{sf1,sf2,sf3,sf4,sf5}

[0188] }

[0189] For the aforementioned SsbInfoPerPci, the example content is as follows:

[0190] SsbInfoPerPci::=SEQUENCE(SIZE(1..maxNrofSsbGroupPerPci))OF SsbInfo

[0191] ...corresponding to a maximum of N SSB groups in a single neighboring cell, N = maxNrofSsbGroupPerPci

[0192] periodicityAndOffset::=CHOICE{

[0193] sf5 INTEGER(0..4),

[0194] sf10 INTEGER(0..9),

[0195] sf20 INTEGER(0..19),

[0196] sf40 INTEGER(0..39),

[0197] sf80 INTEGER(0..79),

[0198] sf160 INTEGER(0..159),

[0199] sf320 INTEGER(0..319),

[0200] sf640 INTEGER(0..639)

[0201] }

[0202] The SsbInfo mentioned above is used to indicate the SSB (such as the grouping of SSBs), and its content can be referred to in Example 2 above. This disclosure does not limit it.

[0203] As an example 5, the SSB measurement period is extended by adding two values: {320ms, 640ms}. There are M neighboring cells, and the SSB of each neighboring cell is divided into at most N groups, with each group corresponding to one measurement period. Taking N as an example with a value of 2, the updated smtc4 can also be as follows:

[0204] SSB-MTC4::=SEQUENCE{

[0205] ssbInfoAndPeriodAndOffsetPerPci-List SEQUENCE(SIZE(1..maxNrofPCIsPerSMTC))OF SsbInfoAndPeriodAndOffsetPerPci

[0206] ...corresponding to M neighboring cells, M = maxNrofPCIsPerSMTC

[0207] duration ENUMERATED{sf1,sf2,sf3,sf4,sf5}

[0208] }

[0209] The content of SsbInfoAndPeriodAndOffsetPerPci can be:

[0210] SsbInfoAndPeriodAndOffsetPerPci::=SEQUENCE{

[0211] physicalCellId PhysCellId

[0212] ssbInfo SsbInfo

[0213] periodicityAndOffset-List SEQUENCE(SIZE(1..maxNrofSsbGroupPerPci))OF periodicityAndOffset

[0214] }

[0215] The SsbInfo mentioned above is used to indicate the SSB (such as the grouping of SSBs), and its content can be referred to in Example 2 above; this disclosure does not limit it. periodicityAndOffset is used to indicate the measurement period and offset used for each SSB group; the content of periodicityAndOffset here can be referred to in the example content of periodicityAndOffset in Example 4. The number of SSB groups indicated by ssbInfo in Example 5 is the same as the number of periodicityAndOffsets in the periodicityAndOffset-List; a one-to-one mapping between SSB groups and periodicityAndOffsets can be achieved by sorting the SSB groups and periodicityAndOffsets.

[0216] Scenario 3: Coverage Enhancement Parameters for TDD

[0217] In some embodiments, time-division duplex coverage enhancement can be achieved by not requiring the start time of downlink transmission to be aligned with frame timing, but rather by allowing flexible adjustment based on coverage requirements.

[0218] In current TDD systems, time-domain resources are typically allocated periodically, with a portion used for uplink transmission, a portion for downlink transmission, and a portion for flexible / special transmissions. When applying TDD technology in NTN, to avoid conflicts between uplink and downlink transmissions (such as the impact of large timing advances (TA) on both), a large guard interval is required between downlink and uplink time-domain resources. This results in very limited resources for uplink and downlink transmissions in NTN's TDD system; for example, typically only 8 subframes can be allocated for downlink transmission. In this case, to ensure that transmission can fully cover the transmission timing of common channels (e.g., SSB, narrowband primary synchronization signal (NPSS), narrowband secondary synchronization signal (NSSS), narrowband physical broadcast channel (NPBCH), SIB1, etc.), in this embodiment, the start time of downlink transmission is not required to be aligned with frame timing but can be flexibly adjusted based on coverage requirements. As an example, as shown in Figure 9, the downlink time-domain resources consist of a portion of the subframes at the end of the first system frame and a portion of the subframes at the beginning of the second system frame. For the same reason, the start time of uplink transmission is not required to be aligned with frame timing, but can be flexibly adjusted based on coverage requirements.

[0219] To prevent the transmission start time from aligning with the frame timing, the offset between the transmission start time and the frame timing, and / or relevant parameters of the period configuration, can be indicated through indication information during transmission period configuration. Figure 10 illustrates a schematic diagram of transmission period configuration as an example.

[0220] As one implementation method, referring to Figure 10, the parameters configured when configuring the transmission cycle include, but are not limited to, at least one of the following:

[0221] The length, minimum length, and / or additional length of the downlink transmission resources. For example, contiguous time-domain resources that can be used for downlink transmission.

[0222] Alternatively, the length, minimum length, and / or additional length of the uplink transmission resources. For example, contiguous time-domain resources that can be used for uplink transmission.

[0223] Alternatively, the length of the periodic pattern.

[0224] Alternatively, the offset of downlink transmission resources. The offset of downlink transmission resources can be the offset between the start and / or end time of the downlink transmission resource and the start time of system frame 0. Alternatively, the offset of downlink transmission resources can be the offset between 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's start and / or end time is located. Alternatively, the offset of downlink transmission resources can be the offset between 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 downlink transmission resources can be the offset between 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 downlink transmission resources can be the offset between the start and / or end time of one segment of downlink transmission resource and the start and / or end time of the previous segment and / or another segment of downlink transmission resource.

[0225] Alternatively, the offset of the uplink transmission resource. The offset of the uplink transmission resource can be the offset between the start and / or end time of the uplink transmission resource and the start time of system frame 0. Alternatively, the offset of the uplink transmission resource can be the offset between 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 start and / or end time of the uplink transmission resource is located. Alternatively, the offset of the uplink transmission resource can be the offset between 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 can be the offset between 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 can be the offset between the start and / or end time of one uplink transmission resource and the start and / or end time of the previous and / or another uplink transmission resource.

[0226] Alternatively, the offset of the periodic pattern. The offset of the periodic pattern can be the offset between the start time of the periodic pattern and the start time of system frame 0. Alternatively, the offset of the periodic pattern can 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 in which the start and / or end time of the periodic pattern are located.

[0227] It should be noted that the parameters configured during transmission cycle configuration can be only some of the parameters described above, or all of the parameters described above can be configured. For example, the start time of the transmission resource can also be aligned with the start time of the cycle pattern. In this case, only the offset of the downlink transmission resource or the offset of the cycle pattern needs to be introduced, instead of introducing both offsets simultaneously. A schematic diagram of transmission cycle configuration in this case is shown in Figure 11.

[0228] It should be noted that the above transmission cycle configuration can be performed using at least one of the following methods:

[0229] MIB, Narrowband Master Information Block (MIB-NB), Physical Broadcast Channel (PBCH), and Narrowband Physical Broadcast Channel (NPBCH) indicators.

[0230] Alternatively, it could be a SIBx / System Information Block x-Narrowband (SIBx-NB) indicator (x can be any number), RRC signaling indicator, MAC CE indicator, or DCI indicator.

[0231] The units for the aforementioned lengths or offsets include, but are not limited to, at least one of the following: superframe, frame, subframe, time slot, symbol, millisecond, or equivalent units (e.g., units could be N subframes, N ms, etc.). The aforementioned start or end times include, but are 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 during transmission cycle configuration may be predefined in the specification.

[0232] In this embodiment of the disclosure, the configuration methods for transmission period configuration can be combined with each other. For example, the protocol specification predefines the length and offset of the period pattern, as well as the minimum length and offset of the downlink transmission resources; the SIB1-NB broadcasts the length and offset of the uplink transmission resources, as well as the length / extra length of the downlink transmission resources.

[0233] In some embodiments, a single parameter may be configured in multiple ways when configuring a transmission cycle. For example, when configuring two downlink transmission resources in a cycle mode, two downlink transmission resource offsets may be configured.

[0234] The above scenarios and methods can be combined, and this disclosure does not limit them.

[0235] It is understood that, in order to achieve the above-mentioned functions, the covering device includes hardware structures and / or software modules corresponding to the execution of each function. Those skilled in the art should readily recognize that, based on the algorithmic steps of the various examples described in connection with the embodiments of this disclosure, the embodiments of this disclosure can be implemented in hardware or a combination of hardware and computer software. Whether a function is executed in a hardware-driven or software-driven manner depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the embodiments of this disclosure.

[0236] This disclosure embodiment can divide the covering device into functional modules according to the above method embodiment. For example, each function can be divided into a separate functional module, or two or more functions can be integrated into one functional module. The integrated module can be implemented in hardware or software. It should be noted that the module division in this disclosure embodiment is illustrative and only represents one logical functional division. In actual implementation, there may be other division methods. The following description uses the example of dividing each functional module according to each function.

[0237] Figure 12 is a schematic diagram of a coverage device 120 provided in an embodiment of this disclosure. The coverage device 120 can execute the coverage method performed by the first node in the above-described method embodiment. As shown in Figure 12, the coverage device includes a processing unit 1201 and a communication unit 1202.

[0238] The communication unit 1202 is used to acquire configuration parameters; the configuration parameters include downlink channel repetition parameters and / or reference signal coverage enhancement parameters.

[0239] The processing unit 1201 is used for communication transmission based on configuration parameters and / or for measurement.

[0240] In one possible implementation, the downlink channel includes a downlink control channel and / or a downlink data channel.

[0241] In one possible implementation, when the downlink channel is a downlink control channel, the retransmission parameters of the downlink channel include at least one of the following: whether to retransmit the downlink control channel, the number of times the downlink control channel is retransmitted, and the transmission resources used for retransmitting the downlink control channel.

[0242] In one possible implementation, the repetition parameters of the downlink control channel are determined based on at least one of the following: predefining the repetition parameters of the downlink control channel corresponding to different types of networks; or, determining the repetition parameters of the downlink control channel based on the first indication information of the second node.

[0243] In one possible implementation, repetitive transmission parameters for downlink control channels corresponding to different types of networks are predefined, including at least one of the following: predefined downlink control channels for repetitive transmission in a specific network scenario; predefined number of repetitive transmissions of the downlink control channel in a specific network scenario; and predefined transmission resources for repetitive transmission of the downlink control channel in a specific network scenario.

[0244] In one possible implementation, the first indication information is carried in a downlink signaling message sent before the downlink control channel.

[0245] In one possible implementation, the downlink signaling message may include a Master Information Block (MIB) message.

[0246] In one possible implementation, 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 set of transmission counts is indicated by the first indication information.

[0247] In one possible implementation, the transmission resources used for repeated transmission of the downlink control channel include N common search spaces (CSS), which are located in the time domain after the reception time of the first indication information.

[0248] 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: determined according to the downlink control channel that schedules the downlink data channel; determined according to the third indication information of other downlink data channels besides the downlink data channel.

[0249] In one possible implementation, determining whether the downlink data channel is retransmitted and the number of retransmissions is based on the downlink control channel that schedules the downlink data channel includes: if the downlink control channel that schedules the downlink data channel is retransmitted, then the downlink data channel is retransmitted, and the number of retransmissions of the downlink data channel is determined based on the number of retransmissions of the downlink control channel.

[0250] In one possible implementation, other downlink data channels besides the downlink data channels include downlink data channels scheduled before the downlink data channels.

[0251] In one possible implementation, when the number of repetitions of the downlink data channel is determined based on 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 repetitions of the downlink data channel is equal to the number of repetitions of the downlink control channel; the number of repetitions of the downlink data channel is equal to the product or ratio of the number of repetitions of the downlink control channel and a first value; 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 a second value.

[0252] In one possible implementation, the first value and / or the second value are preset; or, the first value and / or the second value are indicated by second indication information; the second indication information is carried in a message preceding the downlink data channel.

[0253] In one possible implementation, the transmission resources for repeated transmission of the downlink data channel are determined according to at least one of the following: determined according to the indication of the downlink control channel that schedules the downlink data channel; determined according to the preset transmission resources for repeated transmission of the downlink data channel; or determined according to the third indication information sent by the second node.

[0254] In one possible implementation, when the transmission resources for repeated transmissions of the downlink data channel are determined according to the indication of the 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 on P-1 consecutive time slots after the time-frequency resources, where P is a positive integer.

[0255] In one possible implementation, the third indication information is carried in the downlink data channel transmitted before the downlink data channel.

[0256] In one possible implementation, the downlink data channel includes message 4, and the downlink data channel transmitted before the downlink data channel includes message 2, with the third indication information carried in message 2.

[0257] In one possible implementation, the third indication information may be 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 (MAC RAR) field, or the timing advance (TAC) field.

[0258] In one possible implementation, the communication unit 1202 is further configured to receive fourth indication information, which is used to indicate the coverage enhancement parameters of the reference signal.

[0259] In one possible implementation, the reference signal is a synchronization signal block or a channel state information reference signal.

[0260] In one possible implementation, when the reference signal is a synchronization signal block, the fourth indication information is carried in the synchronization signal block measurement timing configuration message.

[0261] In one possible implementation, the coverage enhancement parameters of the reference signal include multiple synchronization signal block measurement periods of the target cell, with each synchronization signal block measurement period corresponding to one or more synchronization signal blocks.

[0262] 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.

[0263] In one possible implementation, the fourth indication information is based on at least one of the following indication synchronization signal blocks:

[0264] The index of the synchronization signal block; the index of the synchronization signal block group to which the synchronization signal block belongs; 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.

[0265] In one possible implementation, the target cell includes the serving cell of the first node and / or the neighboring cells of the serving cell of the first node.

[0266] In the case of implementing the functions of the integrated modules described above in hardware, this disclosure provides another possible structure for the overlay device involved in the above embodiments. As shown in FIG13, the overlay device 130 includes: a processor 1302 and a bus 1304. In some embodiments, the overlay device may further include a memory 1301; in some embodiments, the overlay device may further include a communication interface 1303.

[0267] Processor 1302 may implement or execute various exemplary logic blocks, modules, and circuits described in connection with embodiments of this disclosure. Processor 1302 may be a central processing unit, a general-purpose processor, a digital signal processor, an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. Processor 1302 may implement or execute various exemplary logic blocks, modules, and circuits described in connection with embodiments of this disclosure. Processor 1302 may also be a combination of functions implementing computing capabilities, such as a combination including one or more microprocessors, a combination of a DSP and a microprocessor, etc.

[0268] The communication interface 1303 is used to connect to other devices via a communication network. This communication network can be Ethernet, wireless access network, wireless local area network (WLAN), etc.

[0269] The memory 1301 may be a read-only memory (ROM) or other type of static storage device capable of storing static information and instructions, random access memory (RAM) or other type of dynamic storage device capable of storing information and instructions, or electrically erasable programmable read-only memory (EEPROM), disk storage medium or other magnetic storage device, or any other medium capable of carrying or storing desired program code in the form of instructions or data structures and accessible by a computer, but is not limited thereto.

[0270] As one possible implementation, the memory 1301 can exist independently of the processor 1302. The memory 1301 can be connected to the processor 1302 via a bus 1304 and is used to store instructions or program code. When the processor 1302 calls and executes the instructions or program code stored in the memory 1301, it can implement the encoding or decoding method provided in the embodiments of this disclosure.

[0271] In another possible implementation, the memory 1301 can also be integrated with the processor 1302.

[0272] Bus 1304 can be an extended industry standard architecture (EISA) bus, etc. Bus 1304 can be divided into address bus, data bus, control bus, etc. For ease of illustration, only one thick line is used to represent it in Figure 13, but this does not mean that there is only one bus or one type of bus.

[0273] Some embodiments of this disclosure provide a computer-readable storage medium (e.g., a non-transitory computer-readable storage medium) storing computer program instructions that, when executed on a computer, cause the computer to perform an encoding or decoding method as described in any of the embodiments above.

[0274] Exemplary examples show that the aforementioned computer-readable storage media may include, but are not limited to: magnetic storage devices (e.g., hard disks, floppy disks, or magnetic tapes), optical discs (e.g., compact disks (CDs), digital versatile disks (DVDs), 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 this disclosure can 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.

[0275] This disclosure provides a computer program product containing instructions that, when run on a computer, cause the computer to perform the overlay method described in any of the above embodiments.

[0276] The above description is merely a specific implementation of the embodiments of this disclosure, but the protection scope of the embodiments of this disclosure is not limited thereto. Any changes or substitutions within the technical scope disclosed in the embodiments of this disclosure should be covered within the protection scope of the embodiments of this disclosure. Therefore, the protection scope of the embodiments of this disclosure should be determined by the protection scope of the claims.

Claims

1. A coverage method applied to a first node, the method comprising: Obtain configuration parameters; the configuration parameters include downlink channel repetition parameters and / or reference signal coverage enhancement parameters; Communication transmission and / or measurement are performed based on the configuration parameters.

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

3. The method according to claim 2, wherein, When the downlink channel is a downlink control channel, the retransmission parameters of the downlink channel include at least one of the following: whether the downlink control channel is retransmitted, the number of times the downlink control channel is retransmitted, and the transmission resources used for retransmitting the downlink control channel.

4. The method according to claim 3, wherein, The retransmission parameters of the downlink control channel are determined based on at least one of the following: Predefine the repetition transmission parameters of the downlink control channel for different types of networks; Alternatively, the repetitive transmission parameters of the downlink control channel can be determined based on the first indication information of the second node.

5. The method according to claim 4, wherein, The predefined repetition transmission parameters for the downlink control channel corresponding to different types of networks include at least one of the following: The downlink control channel is predefined and repeatedly transmitted in a specific network scenario; The number of retransmissions of the downlink control channel in a specific network scenario is predefined; The transmission resources used for repeated transmission of the downlink control channel are predefined in the specific network scenario.

6. The method according to claim 4, wherein, The first indication information is carried in a downlink signaling message transmitted prior to the downlink control channel.

7. The method according to claim 6, wherein, The downlink signaling messages include Master Information Block (MIB) messages.

8. The method according to claim 4, wherein, The number of retransmissions for the downlink control channel is preset; or, The number of retransmissions for 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 count set is indicated by the first indication information.

9. The method according to claim 4, wherein, The transmission resources used for repeated transmission of the downlink control channel include N common search spaces (CSS), where the N CSS are the same time-frequency resources on N consecutive time slots.

10. The method according to claim 4, wherein, The transmission resources used for repeated transmission of the downlink control channel include a symbol set of N consecutive CORESET lengths.

11. The method according to claim 4, wherein, The transmission resources used for repeated transmission of the downlink control channel include a symbol set of N consecutive available lengths of CORESET.

12. The method according to claim 3, wherein, 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: Determined based on the downlink control channel of the downlink data channel being scheduled; Determined based on third indication information of other downlink data channels besides the aforementioned downlink data channel.

13. The method according to claim 12, wherein, Determining whether the downlink data channel is retransmitted and the number of repetitions based on the downlink control channel that schedules the downlink data channel includes: If the downlink control channel of the downlink data channel is repeatedly transmitted, then the downlink data channel is repeatedly transmitted, and the number of times the downlink data channel is repeatedly transmitted is determined according to the number of times the downlink control channel is repeatedly transmitted.

14. The method according to claim 12, wherein, Other downlink data channels besides the aforementioned downlink data channel include downlink data channels scheduled prior to the aforementioned downlink data channel.

15. The method according to claim 12, wherein, When the number of repetitions of the downlink data channel is determined based on 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 retransmissions of the downlink data channel is equal to the product or ratio of the number of retransmissions of the downlink control channel and the first value. The number of retransmissions of the downlink data channel is equal to the sum or difference of the number of retransmissions of the downlink control channel and the second value.

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

17. The method according to claim 12, wherein, The transmission resources for repeated transmissions of the downlink data channel are determined according to at least one of the following: Determined according to the indication of the downlink control channel that schedules the downlink data channel; Determined based on the preset transmission resources used for repeated transmission of downlink data channels; Determined based on the third instruction information sent by the second node.

18. The method according to claim 17, wherein, When the transmission resources for repeated transmissions of the downlink data channel are determined according to the indication of the 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 on P-1 consecutive time slots after the time-frequency resources, where P is a positive integer.

19. The method of claim 17, wherein, The third indication information is carried on the downlink data channel transmitted prior to the downlink data channel.

20. The method according to claim 19, wherein, The downlink data channel includes message 4, and the downlink data channel transmitted before the downlink data channel includes message 2, with the third indication information carried in message 2.

21. The method according to claim 20, wherein, The third indication information is 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 (MAC RAR) field, or the timing advance (TAC) field.

22. The method according to claim 1, wherein, Obtaining the coverage enhancement parameters of the reference signal includes: Receive fourth indication information, which is used to indicate the coverage enhancement parameters of the reference signal.

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

24. The method according to claim 23, wherein, When the reference signal is a synchronization signal block, the fourth indication information is carried in the synchronization signal block measurement timing configuration message.

25. The method according to claim 23, wherein, The coverage enhancement parameters of the reference signal include multiple synchronization signal block measurement periods of the target cell, with each synchronization signal block measurement period corresponding to one or more synchronization signal blocks.

26. The method of claim 25, wherein, 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, wherein, The fourth indication information is based on at least one of the following indication synchronization signal blocks: 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 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, wherein, The target cell includes the serving cell of the first node and / or the neighboring cells of the serving cell of the first node.

29. A covering device, comprising: Memory and processor; The memory and the processor are coupled; The memory is used to store instructions that can be executed by the processor; When the processor executes the instructions, it performs the method according to any one of claims 1-28.

30. A computer-readable storage medium, wherein, The computer-readable storage medium stores computer instructions that, when executed on a computer, cause the computer to perform the method according to any one of claims 1-28.

31. A computer program product, wherein, The computer program product includes computer program instructions that, when executed by a processor, implement the method according to any one of claims 1-28.

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