Downlink transmission control method, network device, terminal, storage medium, and computer program product

Abstract

Disclosed in embodiments of the present application are a downlink transmission control method, a network device, a terminal, a storage medium, and a computer program product. The method applied to a network device comprises: configuring the number of repetitions of downlink transmission for a terminal on the basis of first information, wherein the first information comprises satellite beam information and / or first auxiliary information reported by the terminal; and / or adjusting a downlink frequency division strategy on the basis of second information, wherein the second information comprises at least one of the following: the number of satellite beams, a power limitation requirement, and second auxiliary information reported by the terminal.

Description

Downlink transmission control method, network device, terminal, storage medium and computer program product

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application is based on the Chinese patent application with application number 202311641016.6, application date December 1, 2023, and application name “Downlink transmission control method, network equipment, terminal and storage medium”, and claims the priority of the Chinese patent application. The entire content of the Chinese patent application is hereby incorporated into this application by introduction. Technical Field

[0003] The embodiments of the present application relate to the field of wireless communication technologies, and in particular to a downlink transmission control method, network equipment, terminal, storage medium, and computer program product. Background Art

[0004] Currently, communication standards have been enhanced to address the issue of poor uplink coverage in non-terrestrial networks (NTNs). However, in scenarios where a satellite has multiple satellite beams or power is limited, the satellite's downlink transmission power is affected, resulting in poor downlink coverage and a low downlink data reception success rate. Summary of the Invention

[0005] The embodiments of the present application provide a downlink transmission control method, a network device, a terminal, a storage medium, and a computer program product, which enhance the downlink coverage of the NTN and improve the success rate of downlink data reception.

[0006] The technical solution of the embodiment of the present application is implemented as follows:

[0007] The present invention provides a downlink transmission control method, which is applied to a network device. The method includes:

[0008] Configuring a number of repetitions of downlink transmission for the terminal based on first information; wherein the first information includes satellite beam information and / or first auxiliary information reported by the terminal;

[0009] And / or, adjusting the downlink frequency division strategy based on the second information; wherein the second information includes at least one of the following: the number of satellite beams, the power limit requirement, and the second auxiliary information reported by the terminal.

[0010] In the above method, configuring the number of repetitions of downlink transmission for the terminal based on the first information includes:

[0011] Determine, based on the satellite beam information and / or the first auxiliary information, N repetition number sets; N is a natural number greater than or equal to 1, and each repetition number set includes at least one downlink transmission repetition number determined by at least one item of information included in the satellite beam information and / or the first auxiliary information;

[0012] When N is equal to 1, selecting a repetition number of downlink transmission from a determined repetition number set to configure for the terminal;

[0013] When N is greater than 1, determining the intersection of the N repetition number sets; or,

[0014] When the intersection is a non-empty set, selecting a number of repetitions of downlink transmission from the intersection as the terminal configuration;

[0015] In the case that the intersection is an empty set, a repetition number for the next transmission is selected from the N repetition number sets to configure the terminal.

[0016] In the above method, the satellite beam information includes at least one of the following:

[0017] the number of satellite beams;

[0018] The transmit power allocated to each satellite beam;

[0019] The coverage range of the satellite beam covering the terminal.

[0020] In the above method, when the transmission power allocated to each satellite beam is the same, the number of repetitions of downlink transmission meets at least one of the following conditions:

[0021] is positively correlated with the distance from the first beam reference point to the second beam reference point; wherein the first beam reference point is the reference point of the satellite beam covering the terminal, and the second beam reference point is the reference point of the center satellite beam, and the center satellite beam is the satellite beam in the vertical direction of the satellite;

[0022] Positively correlated with the number of satellite beams;

[0023] It is positively correlated with the coverage range of the satellite beam covering the terminal.

[0024] In the above method, when the transmission power allocated to at least one satellite beam is different from that allocated to other satellite beams, the number of repetitions of downlink transmission is negatively correlated with the transmission power of the satellite beam covering the terminal.

[0025] In the above method, the first auxiliary information includes at least one of the following:

[0026] The communication environment of the terminal;

[0027] The distance between the terminal and the edge of the beam coverage;

[0028] terminal capabilities of the terminal;

[0029] The importance of the data that the terminal expects to receive.

[0030] In the above method, the number of repetitions of downlink transmission satisfies at least one of the following conditions:

[0031] negatively correlated with the communication environment of the terminal;

[0032] Negatively correlated with the distance between the terminal and the edge of the beam coverage;

[0033] negatively correlated with the terminal capability of the terminal;

[0034] It is positively correlated with the importance of the data that the terminal is expected to receive.

[0035] The above method further includes:

[0036] When the cell of the terminal changes, the number of repetitions of downlink transmission is updated for the terminal.

[0037] In the above method, updating the number of repetitions of downlink transmission for the terminal includes at least one of the following:

[0038] In the case where a change in the satellite beam under the same satellite causes a change in the cell of the terminal, updating the number of repetitions of downlink transmission for the terminal based on the change in the transmit power of the satellite beam covering the terminal and / or the change in the distance from the central satellite beam before and after the cell change;

[0039] In the event that a change in the satellite causes a change in the cell of the terminal, updating the number of repetitions of downlink transmission for the terminal based on changes in the satellite orbit altitude and / or satellite service area before and after the cell change;

[0040] In a case where the terminal's cell changes due to movement of the terminal, the number of repetitions of downlink transmission is updated for the terminal based on the cell change information reported by the terminal.

[0041] In the above method, the terminal cell change includes cell handover, the terminal resides in a first cell before the cell handover and resides in a second cell after the handover, and the cell change information includes at least one of the following:

[0042] cell identifiers corresponding to the first cell and the second cell respectively;

[0043] Satellite identification information corresponding to the first cell and the second cell respectively;

[0044] The beam information corresponding to the first cell and the second cell respectively.

[0045] In the above method, at least one of the following methods is used to configure the number of repetitions of downlink transmission for the terminal:

[0046] Broadcast messages;

[0047] Downlink control information DCI;

[0048] Radio Resource Control (RRC) signaling;

[0049] Media Access Control MAC control element.

[0050] The above method further includes:

[0051] Updating the number of repetitions of downlink transmission for the terminal based on at least one of the following information:

[0052] Satellite beam change information, including at least one of a moving speed of the satellite beam and a change in coverage;

[0053] An update request from the terminal;

[0054] Change information of network nodes;

[0055] Information about the service duration of satellites and / or satellite beams.

[0056] In the above method, the second auxiliary information includes at least one of the following:

[0057] Actual received power;

[0058] The monitored idle frequency band information with a signal quality greater than a threshold during the first time period includes at least one of a starting frequency, an ending frequency, an interval, and a data packet reception status.

[0059] The above method further includes:

[0060] The effective usage time corresponding to the number of repetitions of downlink transmission is configured for the terminal.

[0061] An embodiment of the present application provides a downlink transmission control method, which is applied to a terminal, and the method includes:

[0062] Receiving a number of repetitions of downlink transmission configured by a network device based on first information; wherein the first information includes satellite beam information and / or first auxiliary information reported by the terminal;

[0063] And / or, reporting second auxiliary information to the network device so that the network device can adjust the downlink frequency division strategy.

[0064] In the above method, the satellite beam information includes at least one of the following:

[0065] the number of satellite beams;

[0066] The transmit power allocated to each satellite beam;

[0067] The coverage range of the satellite beam covering the terminal.

[0068] In the above method, the first auxiliary information includes at least one of the following:

[0069] The communication environment of the terminal;

[0070] The distance between the terminal and the edge of the beam coverage;

[0071] terminal capabilities of the terminal;

[0072] The importance of the data that the terminal expects to receive.

[0073] In the above method, the second auxiliary information includes at least one of the following:

[0074] Actual received power;

[0075] The monitored idle frequency band information with a signal quality greater than a threshold during the first time period includes at least one of a starting frequency, an ending frequency, an interval, and a data packet reception status.

[0076] In the above method, at least one of the following is also included:

[0077] In a case where downlink data is received before the number of receptions reaches the configured number of repetitions, sending a first response to the network device to instruct the network device to stop repeatedly sending the downlink data;

[0078] In a case where the downlink data is received when the number of receptions reaches the configured number of repetitions, sending a second response to the network device to indicate that the network device has received the downlink data;

[0079] In the case that the downlink data is not successfully received after the configured number of repetitions is reached, a third response is sent to the network device to indicate that the network device has not received the downlink data.

[0080] An embodiment of the present application provides a network device, comprising: a first processor, a first memory, and a first communication bus;

[0081] The first communication bus is configured to implement a communication connection between the first processor and the first memory;

[0082] The first processor is configured to execute one or more computer programs stored in the first memory to implement a downlink transmission control method applied to a network device.

[0083] An embodiment of the present application provides a terminal, comprising: a second processor, a second memory, and a second communication bus;

[0084] The second communication bus is configured to implement a communication connection between the second processor and the second memory;

[0085] The second processor is configured to execute one or more computer programs stored in the second memory to implement a downlink transmission control method applied to a terminal.

[0086] An embodiment of the present application provides a computer-readable storage medium having a computer program stored thereon. When the computer program is executed, the steps of a downlink transmission control method applied to a network device, or the steps of a downlink transmission control method applied to a terminal are implemented.

[0087] An embodiment of the present application provides a computer program product, including a computer program, which, when executed by a processor, implements the steps of a downlink transmission control method applied to a network device, or the steps of a downlink transmission control method applied to a terminal.

[0088] The embodiments of the present application provide a downlink transmission control method, a network device, a terminal, a storage medium and a computer program product. The method applied to the network device includes: configuring the number of repetitions of downlink transmission for the terminal based on the first information; wherein the first information includes satellite beam information and / or first auxiliary information reported by the terminal; and / or, adjusting the downlink frequency division strategy based on the second information; wherein the second information includes at least one of the following: the number of satellite beams, power limit requirements, and the second auxiliary information reported by the terminal. The technical solution provided by the embodiments of the present application allows the network device to configure the number of repetitions of downlink transmission for the terminal so that the terminal repeatedly attempts to receive downlink data, thereby improving the success rate of downlink data reception. It can also adjust the downlink frequency division strategy to perform frequency division multiplexing enhancement, ensure the reliability of downlink transmission, and improve the success rate of downlink data reception. In summary, the technical solution provided by the present application enhances the downlink coverage of NTN and improves the success rate of downlink data reception. BRIEF DESCRIPTION OF THE DRAWINGS

[0089] FIG1 is a flowchart of a downlink transmission control method according to an embodiment of the present application;

[0090] FIG2 is a schematic diagram of an exemplary multi-beam scenario provided in an embodiment of the present application;

[0091] FIG3 is a schematic diagram of an exemplary information configuration provided in an embodiment of the present application;

[0092] FIG4 is a schematic diagram of an exemplary process of adjusting a downlink frequency division strategy according to an embodiment of the present application;

[0093] FIG5 is a second flow chart of a downlink transmission control method provided in an embodiment of the present application;

[0094] FIG6 is a structural diagram 1 of a network device provided in an embodiment of the present application;

[0095] FIG7 is a second structural diagram of a network device provided in an embodiment of the present application;

[0096] FIG8 is a first structural diagram of a terminal provided in an embodiment of the present application;

[0097] FIG9 is a second structural diagram of a terminal provided in an embodiment of the present application. DETAILED DESCRIPTION

[0098] In order to make the purpose, technical solutions and advantages of this application more clear, the following further describes this application in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0099] The following will specifically describe the technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems through embodiments and in conjunction with the accompanying drawings. The following embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments.

[0100] In addition, the technical solutions described in the embodiments of the present application can be combined arbitrarily without conflict.

[0101] The embodiment of the present application provides a downlink transmission control method, which is applied to a network device. FIG1 is a flow chart of a downlink transmission control method provided by the embodiment of the present application. As shown in FIG1 , in the embodiment of the present application, the downlink transmission control method applied to the network device mainly includes the following steps:

[0102] S101. Configure a number of downlink transmission repetitions for a terminal based on first information; wherein the first information includes satellite beam information and / or first auxiliary information reported by the terminal;

[0103] And / or, adjust the downlink frequency division strategy based on the second information; wherein the second information includes at least one of the following: the number of satellite beams, the power limit requirement, and the second auxiliary information reported by the terminal.

[0104] In an embodiment of the present application, in a multi-beam scenario as shown in FIG2 , the network device can configure the number of repetitions of downlink transmission for the terminal, causing the terminal to repeatedly attempt to receive downlink data, thereby improving the downlink data reception success rate. In a power-limited scenario, the network device can adjust the downlink frequency division strategy to enhance frequency division multiplexing and improve the reliability of downlink transmission, thereby improving the downlink data reception success rate. The specific method used by the network device to improve the downlink data reception success rate can be selected according to the actual application scenario and requirements, and is not limited in the embodiment of the present application.

[0105] The following describes in detail a solution in which the network device configures the number of repetitions of downlink transmission for the terminal based on the first information.

[0106] In an embodiment of the present application, the first information includes satellite beam information and / or first assistance information, wherein the satellite beam information includes at least one of the following:

[0107] Number of satellite beams;

[0108] The transmit power allocated to each satellite beam;

[0109] The coverage area of ​​the satellite beam covering the terminal.

[0110] It should be noted that, in the embodiments of the present application, the satellite beam information may not only include at least one of the above three items of information, but may also include other characteristic information related to the satellite beam, which is not limited in the embodiments of the present application.

[0111] In an embodiment of the present application, taking into account satellite beam information, the network device may determine the number of repetitions of downlink transmission for the terminal based on the following principles:

[0112] Case 1: When the transmit power allocated to each satellite beam is the same, the number of repetitions of downlink transmission meets at least one of the following conditions:

[0113] is positively correlated with the distance from the first beam reference point to the second beam reference point; wherein the first beam reference point is the reference point of the satellite beam covering the terminal, the second beam reference point is the reference point of the center satellite beam, and the center satellite beam is the satellite beam in the vertical direction of the satellite;

[0114] Positively correlated with the number of satellite beams;

[0115] It is positively correlated with the coverage of the satellite beam covering the terminal.

[0116] The second case: when the transmission power allocated to at least one satellite beam is different from that of other satellite beams, the number of repetitions of downlink transmission is negatively correlated with the transmission power of the satellite beam covering the terminal.

[0117] Exemplarily, in an embodiment of the present application, the network device configures a repetition number a for a terminal under the coverage of a central satellite beam, and configures a repetition number b for a terminal under the coverage of another satellite beam nkm away from the central satellite beam, where b is proportional to the distance of the satellite beam from the central satellite beam, for example, b = a + n*x, where x is the rate of change of the repetition number per unit distance (such as 1 km).

[0118] Exemplarily, in an embodiment of the present application, the network device evenly distributes the transmission power to each satellite beam. At this time, the number of repetitions of downlink transmission is configured for the terminal according to the size of the coverage range of the satellite beam. For example, the coverage radius of a certain satellite beam is d1km, and the network device configures the number of repetitions a1 for the terminal covered by the satellite beam. For a satellite beam with a coverage radius of d2km (assuming d2>d1), the number of repetitions a2 configured by the network beam for the terminal covered by it will be larger, a2=a1+(d2-d1)*m, where m is the rate of change of the number of repetitions per unit coverage radius (such as 1km).

[0119] In an embodiment of the present application, the first information includes satellite beam information and / or first auxiliary information, wherein the first auxiliary information includes at least one of the following:

[0120] The communication environment of the terminal;

[0121] The distance between the terminal and the edge of the beam coverage;

[0122] Terminal capabilities of the terminal;

[0123] The importance of the data that the terminal expects to receive.

[0124] It should be noted that in the embodiments of the present application, taking into account the differences in terminal capabilities among different types of terminals, for example, ordinary terminals, lightweight terminals, and Internet of Things terminals, the terminal capabilities of the terminal can be specifically reflected in the terminal type, that is, the terminal capabilities can be indicated by the terminal type.

[0125] It should be noted that, in the embodiment of the present application, the first auxiliary information may not only include at least one of the above four items of information, but may also include other characteristic information related to the terminal, which is not limited in the embodiment of the present application.

[0126] In an embodiment of the present application, considering the first auxiliary information reported by the terminal, the network device may determine, based on the following principles, that the number of repetitions of downlink transmission for the terminal satisfies at least one of the following conditions:

[0127] Number of repetitions for downlink transmission:

[0128] Negatively correlated with the terminal's communication environment;

[0129] Negatively correlated with the distance between the terminal and the edge of the beam coverage;

[0130] Negatively correlated with the terminal's terminal capabilities;

[0131] It is positively correlated with the importance of the data that the terminal expects to receive.

[0132] It is understood that in the embodiments of the present application, the worse the terminal's communication environment, for example, a forest with obstructing trees in the communication environment, the greater the number of downlink transmission repetitions configured. The terminal's communication environment can be determined by the terminal based on its own location information and can be indicated in the form of an index, for example, 00 corresponds to the ocean, 01 corresponds to the forest, 02 corresponds to the desert, etc. The specific correspondence between the index and the communication environment can be pre-deployed in the terminal or specified in the protocol in the form of a table or information element.

[0133] It can be understood that, in the embodiment of the present application, the worse the terminal capability of the terminal, that is, the lower the terminal type level, the more repetitions of the configured downlink transmission.

[0134] It can be understood that in the embodiments of the present application, the greater the distance between the terminal and the edge of the beam coverage, that is, the closer the terminal is to the edge of the beam coverage, the more repetitions of the configured downlink transmission.

[0135] It can be understood that in the embodiment of the present application, the more important the data that the terminal expects to receive is, the more repetitions of the configured downlink transmission are required in order to ensure that the data reaches the terminal as quickly and successfully as possible.

[0136] It should be noted that in an embodiment of the present application, the above-mentioned satellite beam information and the first auxiliary information each include at least one item of information. Different information can affect the number of repetitions of the next transmission configured from different dimensions. Based on this, the number of repetitions of the downlink transmission can be finally determined by considering different information combinations.

[0137] In an embodiment of the present application, a network device configures the number of repetitions of downlink transmission for a terminal based on the first information, including: determining N repetition number sets based on satellite beam information and / or first auxiliary information; N is a natural number greater than or equal to 1, and each repetition number set contains at least one downlink transmission repetition number determined by at least one item of information included in the satellite beam information and / or the first auxiliary information; when N is equal to 1, selecting a downlink transmission repetition number from a determined repetition number set for terminal configuration; or, when N is greater than 1, determining the intersection of N repetition number sets; when the intersection is a non-empty set, selecting a downlink transmission repetition number from the intersection for terminal configuration; when the intersection is an empty set, selecting a repetition number for the next transmission from the N repetition number sets for terminal configuration.

[0138] It should be noted that in the embodiments of the present application, the number of repetitions of at least one downlink transmission contained in each repetition number set can be selectively determined by one or more pieces of information, wherein the number of downlink transmission repetitions in the same repetition number set can be determined by the same information based on different rules, or by different information. The specific N repetition number sets are not limited in the embodiments of the present application.

[0139] It is understood that in the embodiments of the present application, when the number of determined repetition number sets is one, that is, when N is equal to 1, the network device can directly select a downlink transmission repetition number from them to configure for the terminal. The specific selection rule can be based on the priority of each piece of information used to determine the downlink transmission repetition number. For example, the repetition number set determined by the network device is {1, 2, 3}, where the information used to determine the repetition number 2 has the highest priority. Therefore, the downlink transmission repetition number selected for the terminal configuration is 2. The specific selection rule can be set according to actual needs and application scenarios, and is not limited in the embodiments of the present application.

[0140] It can be understood that in the embodiments of the present application, when the number of determined repetition number sets is multiple, that is, N is greater than 1, the network device can select a downlink transmission repetition number from the intersection of the N repetition number sets as the terminal configuration to ensure that the factors of multiple dimensions are considered to the maximum extent to configure the terminal with a better downlink transmission repetition number. Of course, if the intersection is empty, the network device can directly select a downlink transmission repetition number from the N repetition number sets as the terminal configuration. The specific selection rules can be set according to actual needs and application scenarios, and are not limited in the embodiments of the present application.

[0141] In an embodiment of the present application, the satellite high-speed mobile cell will change frequently, or the terminal moves to a different cell, especially when the terminal and the satellite or satellite beam move in opposite directions. Considering the impact of the cell change, the network device can also update the number of repetitions of downlink transmission for the terminal when the terminal cell changes.

[0142] In an embodiment of the present application, the network device updates the number of repetitions of downlink transmission for the terminal, including at least one of the following: when the satellite beam change causes the terminal cell change under the same satellite, the number of repetitions of downlink transmission is updated for the terminal based on the change in the transmission power of the satellite beam covering the terminal and / or the change in distance from the central satellite beam before and after the cell change; when the satellite change causes the terminal cell change, the number of repetitions of downlink transmission is updated for the terminal based on the change in the satellite orbit altitude and / or the satellite service area before and after the cell change; when the terminal movement causes the terminal cell change, the number of repetitions of downlink transmission is updated for the terminal based on the cell change information reported by the terminal.

[0143] It should be noted that in an embodiment of the present application, when the change of the satellite beam under the same satellite causes the change of the terminal cell, if the transmission power allocated by the satellite beam covering the terminal after the cell change is lower and / or is farther away from the central satellite beam, the number of repetitions of the downlink transmission can be increased; otherwise, the number of repetitions of the downlink transmission can be reduced.

[0144] It should be noted that in the embodiments of the present application, when changes in the satellite cause changes in the terminal cell, if the satellite orbit height becomes a higher orbit than before, the number of repetitions of downlink transmission can be increased. If the satellite orbit height has not changed, but the distance from the previously served area is farther, the number of repetitions of downlink transmission can also be increased. Conversely, the number of repetitions of downlink transmission can be reduced.

[0145] It should be noted that, in the embodiment of the present application, the terminal cell change includes cell switching, the terminal resides in the first cell before the cell switching, and resides in the second cell after the switching. The network device may update the number of repetitions of downlink transmission for the terminal based on the cell change information reported by the terminal, wherein the cell change information reported by the terminal includes at least one of the following:

[0146] cell identifiers corresponding to the first cell and the second cell respectively;

[0147] Satellite identification information corresponding to the first cell and the second cell respectively;

[0148] The beam information corresponding to the first cell and the second cell respectively.

[0149] In an embodiment of the present application, the network device may further update the number of repetitions of downlink transmission for the terminal based on at least one of the following information:

[0150] Satellite beam change information, including at least one of a moving speed of the satellite beam and a change in coverage;

[0151] Terminal update request;

[0152] Change information of network nodes;

[0153] Information about the service duration of satellites and / or satellite beams.

[0154] It should be noted that in the embodiments of the present application, the network device can not only update the number of repetitions of downlink transmission for the terminal based on at least one of the above information, but can also update based on characteristic information of other networks or terminals, which is not limited in the embodiments of the present application.

[0155] In an embodiment of the present application, the network device configures the number of repetitions of downlink transmission for the terminal in at least one of the following ways:

[0156] Broadcast messages;

[0157] Downlink Control Information (DCI);

[0158] Radio Resource Control (RRC) signaling;

[0159] Media Access Control (MAC) control element.

[0160] It should be noted that in the embodiment of the present application, the network device can not only configure the number of repetitions of downlink transmission for the terminal, but also configure the effective usage time corresponding to the number of repetitions of downlink transmission for the terminal, and specifically can be configured simultaneously in the same way.

[0161] It can be understood that in the embodiment of the present application, the network device updates the number of repetitions of downlink transmission for the terminal, which is actually reconfiguring the number of repetitions of downlink transmission for the terminal, and the configuration is achieved using at least one of the above methods.

[0162] It should be noted that in an embodiment of the present application, the network device can initially configure the number of repetitions of downlink transmission for terminals in the entire cell through a broadcast message, and update the number of repetitions of downlink transmission through a dedicated signaling message after entering the connected state.

[0163] It should be noted that in an embodiment of the present application, for messages (Message, Msg) in the communication protocol, for example, Msg2 / MsgB / Msg4, the network device carries the number of repetitions of downlink transmission in the corresponding MAC control element or the DCI scheduling Msg2 / MsgB / Msg4 for the terminal configuration.

[0164] Exemplarily, in an embodiment of the present application, the number of repetitions of downlink transmission and / or the effective duration of the repetition number can be carried in a broadcast message or a DCI corresponding to the scheduling Msg2 / MsgB for terminal configuration, utilizing the existing R bit.

[0165] Exemplarily, in an embodiment of the present application, as shown in FIG3 , the number of repetitions of downlink transmission can be carried in the MAC control element corresponding to Msg4 for terminal configuration. Specifically, two R bits can be used, one for indicating the number of repetitions of downlink transmission, and the other for indicating the corresponding effective usage time.

[0166] The following describes in detail a solution for the network device to adjust the downlink frequency division strategy based on the second information.

[0167] It should be noted that in power-limited scenarios, the solution of configuring the number of repetitions of downlink transmission may actually increase interference and fail to meet the power flux-density (PFD) limit requirements. Based on this, it is possible to consider improving the downlink data reception success rate through frequency division multiplexing enhancement.

[0168] In an embodiment of the present application, the second information includes at least one of the following: the number of satellite beams, the power limit requirement, and the second auxiliary information reported by the terminal, wherein the second auxiliary information includes at least one of the following:

[0169] Actual received power;

[0170] The monitored idle frequency band information with a signal quality greater than a threshold during the first time period includes at least one of a starting frequency, an ending frequency, an interval, and a data packet reception status.

[0171] It should be noted that in the embodiments of the present application, the first time period, which is used to evaluate the threshold value of signal quality, can be configured by the network device, and the configuration principle can be based on the service type, quality of service (QoS) requirements, etc., which is not limited in the embodiments of the present application.

[0172] FIG4 is a flow chart of an exemplary process of adjusting the downlink frequency division strategy provided by an embodiment of the present application. As shown in FIG4 , the process mainly includes the following steps:

[0173] S201. The network device configures RSRP (Reference Signal Received Power) / RSRQ (Reference Signal Received Quality) threshold information and time information for monitoring idle frequency bands for the terminal.

[0174] S202. The terminal monitors idle frequency bands according to the configured information. If the RSRP / RSRQ of a certain frequency band exceeds the threshold within a period of time, the frequency band is reported to the network device in the form of starting frequency + interval;

[0175] S203. The network device evenly increases the frequency resources of the frequency band for different satellite beams according to the idle frequency band information reported by the terminal;

[0176] S204: The terminal monitors the number of data packets actually successfully received within a period of time and feeds back the number to the network device;

[0177] S205. The network device determines whether the number of data packets reported by the terminal is less than a certain threshold and / or whether the type of data communication service to be performed has relatively high reliability and / or latency requirements. If the determination result is yes, proceed to step S206.

[0178] S206: Add monitored idle frequency band frequency resources to the terminal.

[0179] It should be noted that in the embodiment of the present application, the process shown in Figure 4 is only an exemplary method of adjusting the downlink frequency division strategy based on the second auxiliary information. Of course, the network device can also use other rules or methods to adjust the downlink frequency division strategy based on the second auxiliary information, and the embodiment of the present application is not limited.

[0180] The embodiment of the present application also provides a downlink transmission control method, which is applied to a terminal. FIG5 is a second flow diagram of a downlink transmission control method provided by the embodiment of the present application. As shown in FIG5 , the downlink transmission control method applied to a terminal mainly includes the following steps:

[0181] S301. Receive a number of repetitions of downlink transmission configured by a network device based on first information; wherein the first information includes satellite beam information and / or first auxiliary information reported by a terminal;

[0182] And / or, reporting the second auxiliary information to the network device so that the network device can adjust the downlink frequency division strategy.

[0183] In an embodiment of the present application, corresponding to the above-mentioned downlink transmission control method applied to the network device, the terminal can receive the number of repetitions of the downlink transmission configured by the network device, so that the terminal repeatedly attempts to receive the downlink data, thereby improving the success rate of downlink data reception. In addition, the terminal can also report second auxiliary information to the network device, so that the network device can adjust the downlink frequency division strategy to enhance frequency division multiplexing, thereby improving the reliability of downlink transmission and thus improving the success rate of downlink data reception.

[0184] In an embodiment of the present application, the satellite beam information includes at least one of the following:

[0185] Number of satellite beams;

[0186] The transmit power allocated to each satellite beam;

[0187] The coverage area of ​​the satellite beam covering the terminal.

[0188] In an embodiment of the present application, the first auxiliary information includes at least one of the following:

[0189] The communication environment of the terminal;

[0190] The distance between the terminal and the edge of the beam coverage;

[0191] Terminal capabilities of the terminal;

[0192] The importance of the data that the terminal expects to receive.

[0193] In an embodiment of the present application, after receiving the number of repetitions of downlink transmission configured by the network device, the terminal can perform at least one of the following: in case downlink data is received before the number of receptions reaches the configured number of repetitions, sending a first response to the network device to instruct the network device to stop repeatedly sending downlink data; in case downlink data is received when the number of receptions reaches the configured number of repetitions, sending a second response to the network device to indicate that the network device has received the downlink data; in case the downlink data is not successfully received after reaching the configured number of repetitions, sending a third response to the network device to indicate that the network device has not received the downlink data.

[0194] It can be understood that in an embodiment of the present application, when the terminal receives downlink data before the number of receptions reaches the configured number of repetitions, it can promptly instruct the network device to stop repeatedly sending downlink data, thereby avoiding the network device from continuing to repeatedly send downlink data and saving the transmission resources of the network device; when the terminal receives downlink data when the number of receptions reaches the configured number of repetitions, it indicates to the network device that the downlink data has been received, and the network device can thereby know that the currently configured number of repetitions of downlink transmission is suitable for the terminal; when the terminal fails to successfully receive downlink data after reaching the configured number of repetitions, it indicates to the network device that the downlink data has not been received, and the network device can thereby know that the currently configured number of repetitions of downlink transmission is less, and can appropriately increase the number of repetitions of downlink transmission for the terminal.

[0195] In an embodiment of the present application, the second auxiliary information includes at least one of the following:

[0196] Actual received power;

[0197] The monitored idle frequency band information with a signal quality greater than a threshold during the first time period includes at least one of a starting frequency, an ending frequency, an interval, and a data packet reception status.

[0198] It should be noted that in the embodiments of the present application, the second auxiliary information can be reported by the terminal when triggered by a network device, or it can be reported by the terminal when certain conditions are met, or periodically. It can be determined based on actual needs and application scenarios, and the embodiments of the present application do not limit it.

[0199] The embodiment of the present application provides a network device. FIG6 is a structural diagram of a network device provided in the embodiment of the present application. As shown in FIG6, in the embodiment of the present application, the network device includes:

[0200] The processing module 401 is configured to configure the number of repetitions of downlink transmission for the terminal based on first information; wherein the first information includes satellite beam information and / or first auxiliary information reported by the terminal; and / or, adjust the downlink frequency division strategy based on second information; wherein the second information includes at least one of the following: the number of satellite beams, power limit requirements, and second auxiliary information reported by the terminal.

[0201] In one embodiment of the present application, the processing module 401 is configured to determine N repetition number sets based on the satellite beam information and / or the first auxiliary information; N is a natural number greater than or equal to 1, and each repetition number set includes at least one downlink transmission repetition number determined by at least one information included in the satellite beam information and / or the first auxiliary information; when N is equal to 1, a downlink transmission repetition number is selected from a determined repetition number set as the terminal configuration; or, when N is greater than 1, the intersection of the N repetition number sets is determined; when the intersection is a non-empty set, a downlink transmission repetition number is selected from the intersection as the terminal configuration; when the intersection is an empty set, a repetition number for the next transmission is selected from the N repetition number sets as the terminal configuration.

[0202] In one embodiment of the present application, the satellite beam information includes at least one of the following:

[0203] the number of satellite beams;

[0204] The transmit power allocated to each satellite beam;

[0205] The coverage range of the satellite beam covering the terminal.

[0206] In one embodiment of the present application, when the transmit power allocated to each satellite beam is the same, the number of repetitions of downlink transmission satisfies at least one of the following conditions:

[0207] is positively correlated with the distance from the first beam reference point to the second beam reference point; wherein the first beam reference point is the reference point of the satellite beam covering the terminal, and the second beam reference point is the reference point of the center satellite beam, and the center satellite beam is the satellite beam in the vertical direction of the satellite;

[0208] Positively correlated with the number of satellite beams;

[0209] It is positively correlated with the coverage range of the satellite beam covering the terminal.

[0210] In an embodiment of the present application, when the transmission power allocated to at least one satellite beam is different from that allocated to other satellite beams, the number of repetitions of downlink transmission is negatively correlated with the transmission power of the satellite beam covering the terminal.

[0211] In one embodiment of the present application, the first auxiliary information includes at least one of the following:

[0212] The communication environment of the terminal;

[0213] The distance between the terminal and the edge of the beam coverage;

[0214] terminal capabilities of the terminal;

[0215] The importance of the data that the terminal expects to receive.

[0216] In one embodiment of the present application, the number of repetitions of downlink transmission satisfies at least one of the following conditions:

[0217] negatively correlated with the communication environment of the terminal;

[0218] Negatively correlated with the distance between the terminal and the edge of the beam coverage;

[0219] negatively correlated with the terminal capability of the terminal;

[0220] It is positively correlated with the importance of the data that the terminal is expected to receive.

[0221] In an embodiment of the present application, the processing module 401 is configured to update the number of repetitions of downlink transmission for the terminal when the cell of the terminal changes.

[0222] In one embodiment of the present application, the processing module 401 is configured to perform at least one of the following:

[0223] In the case where a change in the satellite beam under the same satellite causes a change in the cell of the terminal, updating the number of repetitions of downlink transmission for the terminal based on the change in the transmit power of the satellite beam covering the terminal and / or the change in the distance from the central satellite beam before and after the cell change;

[0224] In the event that a change in the satellite causes a change in the cell of the terminal, updating the number of repetitions of downlink transmission for the terminal based on changes in the satellite orbit altitude and / or satellite service area before and after the cell change;

[0225] In a case where the terminal's cell changes due to movement of the terminal, the number of repetitions of downlink transmission is updated for the terminal based on the cell change information reported by the terminal.

[0226] In one embodiment of the present application, the terminal cell change includes cell switching, the terminal resides in a first cell before the cell switching and resides in a second cell after the switching, and the cell change information includes at least one of the following: cell identifiers corresponding to the first cell and the second cell;

[0227] Satellite identification information corresponding to the first cell and the second cell respectively;

[0228] The beam information corresponding to the first cell and the second cell respectively.

[0229] In an embodiment of the present application, the processing module 401 is configured to configure the number of repetitions of downlink transmission for the terminal in at least one of the following ways:

[0230] Broadcast messages;

[0231] Downlink control information DCI;

[0232] Radio Resource Control (RRC) signaling;

[0233] Media Access Control MAC control element.

[0234] In an embodiment of the present application, the processing module 401 is configured to update the number of repetitions of downlink transmission for the terminal based on at least one of the following information:

[0235] Satellite beam change information, including at least one of a moving speed of the satellite beam and a change in coverage;

[0236] An update request from the terminal;

[0237] Change information of network nodes;

[0238] Information about the service duration of satellites and / or satellite beams.

[0239] In one embodiment of the present application, the second auxiliary information includes at least one of the following:

[0240] Actual received power;

[0241] The monitored idle frequency band information with a signal quality greater than a threshold during the first time period includes at least one of a starting frequency, an ending frequency, an interval, and a data packet reception status.

[0242] In an embodiment of the present application, the processing module 401 is configured to configure, for the terminal, an effective usage time corresponding to the number of repetitions of downlink transmission.

[0243] Figure 7 is a second structural diagram of a network device provided in an embodiment of the present application. As shown in Figure 7, in an embodiment of the present application, the network device includes: a first processor 501, a first memory 502, and a first communication bus 503;

[0244] The first communication bus 503 is configured to implement a communication connection between the first processor 501 and the first memory 502;

[0245] The first processor 501 is configured to execute one or more computer programs stored in the first memory 502 to implement a downlink transmission control method applied to a network device.

[0246] The present application provides a terminal. FIG8 is a structural diagram of a terminal provided in the present application. As shown in FIG8, in the embodiment of the present application, the terminal includes:

[0247] The communication module 601 is configured to receive the number of repetitions of downlink transmission configured by the network device based on first information; wherein the first information includes satellite beam information and / or first auxiliary information reported by the terminal; and / or, report second auxiliary information to the network device so that the network device can adjust the downlink frequency division strategy.

[0248] In an embodiment of the present application, the satellite beam information includes at least one of the following: the number of satellite beams; the transmission power allocated to each satellite beam; and the coverage range of the satellite beam covering the terminal.

[0249] In one embodiment of the present application, the first auxiliary information includes at least one of the following: the communication environment of the terminal; the distance between the terminal and the edge of the beam coverage; the terminal capability of the terminal; and the importance of the data that the terminal expects to receive.

[0250] In one embodiment of the present application, the second auxiliary information includes at least one of the following: actual received power; idle frequency band information monitored in the first time period with a signal quality greater than a threshold, including at least one of the starting frequency, ending frequency, interval, and data packet reception status.

[0251] In an embodiment of the present application, the communication module 601 is configured to perform at least one of the following:

[0252] In a case where downlink data is received before the number of receptions reaches the configured number of repetitions, sending a first response to the network device to instruct the network device to stop repeatedly sending the downlink data;

[0253] In a case where the downlink data is received when the number of receptions reaches the configured number of repetitions, sending a second response to the network device to indicate that the network device has received the downlink data;

[0254] In the case that the downlink data is not successfully received after the configured number of repetitions is reached, a third response is sent to the network device to indicate that the network device has not received the downlink data.

[0255] Figure 9 is a second structural diagram of a terminal provided in an embodiment of the present application. As shown in Figure 9, in an embodiment of the present application, the terminal includes: a second processor 701, a second memory 702, and a second communication bus 703;

[0256] The second communication bus 703 is configured to implement a communication connection between the second processor 701 and the second memory 702;

[0257] The second processor 701 is configured to execute one or more computer programs stored in the second memory 702 to implement a downlink transmission control method applied to a terminal.

[0258] An embodiment of the present application provides a computer program product, including a computer program, which, when executed by a processor, implements the steps of a downlink transmission control method applied to a network device, or the steps of a downlink transmission control method applied to a terminal.

[0259] An embodiment of the present application provides a computer-readable storage medium having a computer program stored thereon, which, when executed, implements the steps of a downlink transmission control method applied to a network device, or the steps of a downlink transmission control method applied to a terminal. The computer-readable storage medium may be a volatile memory (volatile memory), such as a random-access memory (RAM); or a non-volatile memory (non-volatile memory), such as a read-only memory (ROM), a flash memory, a hard disk drive (HDD), or a solid-state drive (SSD); or may be a respective device including one or any combination of the above memories, such as a mobile phone, a computer, a tablet device, a personal digital assistant, etc.

[0260] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of hardware embodiments, software embodiments, or embodiments combining software and hardware. Furthermore, the present application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage and optical storage, etc.) containing computer-usable program code.

[0261] The present application is described with reference to the implementation flow diagram and / or block diagram of the method, device (system) and computer program product according to the embodiment of the present application. It should be understood that each flow and / or box in the flow diagram and / or block diagram and the combination of the flow and / or box in the flow diagram and / or block diagram can be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processing machine or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device produce a device for realizing the function specified in one flow diagram or multiple flows and / or one block or multiple blocks of the block diagram.

[0262] These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce a product including an instruction device that implements the functions specified in implementing one or more processes in the flowchart and / or one or more boxes in the block diagram.

[0263] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, whereby the instructions executed on the computer or other programmable device provide steps for implementing the functions specified in one or more processes in the flowchart and / or one or more boxes in the block diagram.

[0264] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this utility model should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A downlink transmission control method, applied to a network device, the method comprising: Configure the number of repetitions of downlink transmission for the terminal based on the first information; wherein the first information includes satellite beam information and / or first auxiliary information reported by the terminal; And / or, adjusting the downlink frequency division strategy based on the second information; wherein the second information includes at least one of the following: the number of satellite beams, the power limitation requirement, and the second auxiliary information reported by the terminal.

2. The method according to claim 1, wherein: The configuring the number of repetitions of downlink transmission for the terminal based on the first information includes: Based on the satellite beam information and / or the first auxiliary information, determine N repetition number sets; N is a natural number greater than or equal to 1, and each repetition number set includes at least one downlink transmission repetition number determined by at least one item of information included in the satellite beam information and / or the first auxiliary information; When N is equal to 1, selecting a repetition number of downlink transmission from a determined repetition number set to configure the terminal; or, When N is greater than 1, determining the intersection of the N sets of repetition times; When the intersection is a non-empty set, selecting a number of repetitions of downlink transmission from the intersection as the terminal configuration; In the case that the intersection is an empty set, a repetition number for the next transmission is selected from the N repetition number sets to configure the terminal.

3. The method according to claim 1 or 2, wherein: The satellite beam information includes at least one of the following: the number of satellite beams; The transmit power allocated to each satellite beam; The coverage of the satellite beam covering the terminal.

4. The method according to claim 3, wherein: When the transmission power allocated to each satellite beam is the same, the number of repetitions of downlink transmission meets at least one of the following conditions: is positively correlated with the distance from the first beam reference point to the second beam reference point; wherein the first beam reference point is a reference point of a satellite beam covering the terminal, and the second beam reference point is a reference point of a central satellite beam, and the central satellite beam is a satellite beam in a vertical direction of the satellite; Positively correlated with the number of satellite beams; It is positively correlated with the coverage range of the satellite beam covering the terminal.

5. The method according to claim 3, wherein: When the transmission power allocated to at least one satellite beam is different from that allocated to other satellite beams, the number of repetitions of downlink transmission is negatively correlated with the transmission power of the satellite beam covering the terminal.

6. The method according to claim 1 or 2, wherein: The first auxiliary information includes at least one of the following: The communication environment of the terminal; The distance between the terminal and the edge of the beam coverage; terminal capabilities of the terminal; The importance of the data that the terminal expects to receive.

7. The method according to claim 6, wherein: The number of repetitions of downlink transmission meets at least one of the following conditions: Negatively correlated with the communication environment of the terminal; Negatively correlated with the distance between the terminal and the edge of the beam coverage; negatively correlated with the terminal capability of the terminal; It is positively correlated with the importance of the data that the terminal is expected to receive.

8. The method according to claim 1, wherein: The method further comprises: When the cell of the terminal changes, the number of repetitions of downlink transmission is updated for the terminal.

9. The method according to claim 8, wherein: The updating of the number of repetitions of downlink transmission for the terminal includes at least one of the following: In the case where a change in the satellite beam under the same satellite causes a change in the cell of the terminal, based on the change in the transmission power of the satellite beam covering the terminal and / or the change in the distance from the central satellite beam before and after the cell change, updating the number of repetitions of downlink transmission for the terminal; In the case where a change in the satellite causes a change in the cell of the terminal, updating the number of repetitions of downlink transmission for the terminal based on changes in the satellite orbit altitude and / or the satellite service area before and after the cell change; In the case that the terminal moves and causes the cell of the terminal to change, the number of repetitions of downlink transmission is updated for the terminal based on the cell change information reported by the terminal.

10. The method according to claim 9, wherein: The terminal cell change includes cell switching, the terminal resides in a first cell before the cell switching and resides in a second cell after the switching, and the cell change information includes at least one of the following: The cell identifiers corresponding to the first cell and the second cell respectively; Satellite identification information corresponding to the first cell and the second cell respectively; The beam information corresponding to the first cell and the second cell respectively.

11. The method according to claim 1, wherein: The number of repetitions of downlink transmission is configured for the terminal in at least one of the following ways: Broadcast messages; Downlink control information DCI; Radio Resource Control (RRC) signaling; Media Access Control MAC control element.

12. The method according to claim 1, wherein: The method further comprises: Updating the number of repetitions of downlink transmission for the terminal based on at least one of the following information: Satellite beam change information, including at least one of a moving speed of the satellite beam and a change in coverage; An update request of the terminal; Change information of network nodes; Information about the service duration of satellites and / or satellite beams.

13. The method according to claim 1, wherein: The second auxiliary information includes at least one of the following: Actual received power; The monitored idle frequency band information with a signal quality greater than a threshold in the first time period includes at least one of a start frequency, an end frequency, an interval, and a data packet reception condition.

14. The method according to claim 1, wherein: The method further comprises: An effective usage time corresponding to the number of repetitions of downlink transmission is configured for the terminal.

15. A downlink transmission control method, applied to a terminal, the method comprising: The receiving network device configures the number of repetitions of downlink transmission based on first information; wherein the first information includes satellite beam information and / or first auxiliary information reported by the terminal; And / or, reporting second auxiliary information to the network device so that the network device can adjust the downlink frequency division strategy.

16. The method according to claim 15, wherein: The satellite beam information includes at least one of the following: the number of satellite beams; The transmit power allocated to each satellite beam; The coverage of the satellite beam covering the terminal.

17. The method according to claim 15, wherein: The first auxiliary information includes at least one of the following: The communication environment of the terminal; The distance between the terminal and the edge of the beam coverage; terminal capabilities of the terminal; The importance of the data that the terminal expects to receive.

18. The method according to claim 15, wherein: The second auxiliary information includes at least one of the following: Actual received power; The monitored idle frequency band information with a signal quality greater than a threshold in the first time period includes at least one of a start frequency, an end frequency, an interval, and a data packet reception condition.

19. The method according to claim 15, wherein: The method further comprises at least one of the following: In the case where the downlink data is received before the number of receptions reaches the configured number of repetitions, sending a first response to the network device to instruct the network device to stop repeatedly sending the downlink data; In the case where the downlink data is received when the number of receptions reaches the configured number of repetitions, sending a second response to the network device to indicate that the network device has received the downlink data; In the case that the downlink data is not successfully received after reaching the configured number of repetitions, a third response is sent to the network device to indicate that the network device has not received the downlink data.

20. A network device comprising: a first processor, a first memory, and a first communication bus; The first communication bus is configured to implement a communication connection between the first processor and the first memory; The first processor is configured to execute one or more computer programs stored in the first memory to implement the downlink transmission control method according to any one of claims 1-14.

21. A terminal, comprising: a second processor, a second memory, and a second communication bus; The second communication bus is configured to implement a communication connection between the second processor and the second memory; The second processor is configured to execute one or more computer programs stored in the second memory to implement the downlink transmission control method described in any one of claims 15-19.

22. A computer-readable storage medium having a computer program stored thereon, wherein the computer program, when executed, implements the downlink transmission control method according to any one of claims 1 to 19.

23. A computer program product, comprising a computer program, wherein when the computer program is executed by a processor, the downlink transmission control method according to any one of claims 1 to 19 is implemented.

Images