Low earth orbit satellite data communication method and system

Abstract

The present disclosure provides a low-orbit satellite data communication method and system, comprising: a 5G base station determining a first scheduled user equipment from a plurality of low-orbit satellite user equipments according to telemetry service requirements; determining link quality data corresponding to the first scheduled user equipment through ephemeris information corresponding to the first scheduled user equipment and high-orbit relay satellite ephemeris information; determining a second scheduled user equipment from the first scheduled user equipment according to the link quality data; and determining a target scheduled user equipment according to a scheduling priority corresponding to the second scheduled user equipment; sending a PDCCH channel within a PDCCH receiving window; the target scheduled user equipment sending a PUSCH channel carrying telemetry service data to the 5G base station; and / or, a PUSCH channel carrying telemetric service data; when the 5G base station receives the PUSCH channel, forwarding the telemetry service data to a third-party central equipment through a core network; and / or, forwarding the telemetric service data to the third-party central equipment through the core network. Thus, the efficiency of low-orbit satellite data communication is effectively improved.

Description

TECHNICAL FIELD

[0001] Embodiments of the present disclosure relate to the field of satellite communication technology, in particular, to a low-orbit satellite data communication method and system. BACKGROUND

[0002] Affected by complex and changeable geopolitical factors, the global layout of low-orbit satellite ground stations is facing severe challenges, resulting in a significant reduction in the timeliness of ground stations for low-orbit satellite control: for example, when a satellite enters a ground station coverage blind area, the ground station has difficulty in timely and effective orbit monitoring, transmission attitude adjustment, and other control instructions for the low-orbit satellite, increasing the risk of satellite operation; at the same time, in terms of low-orbit satellite data backhaul, due to the lack of a sufficient number of reasonably distributed ground stations, a large amount of observation data cannot be timely downloaded, seriously affecting the real-time and integrity of the data, and thus limiting the application efficiency of low-orbit satellites in fields such as disaster warning, real-time communication, and other fields with high requirements for data timeliness.

[0003] In the prior art, low-orbit satellite user space telemetry data or space telemetry data is usually filtered and converted from Ka signals sent by user links to QV signals of feeder links by high-orbit relay satellites, and is forwarded to 5G base stations and core networks through feeder links and gateway stations, so as to realize communication between low-orbit satellite space telemetry data or space telemetry data and 5G base stations. However, due to the relatively fixed resource scheduling mechanism of high-orbit satellite communication systems, resource allocation cannot be dynamically adjusted in real time to serve the random control and telemetry business needs of a large number of low-orbit satellite users, resulting in low efficiency of low-orbit satellite data communication. SUMMARY

[0004] The embodiments described herein provide a low-orbit satellite data communication method and system, which overcome the above problems.

[0005] In a first aspect, according to the content of the present disclosure, a low-orbit satellite data communication method is provided, comprising:

[0006] The 5G base station determines a first scheduled user equipment from a plurality of low-orbit satellite user equipments according to telemetry business requirements; and determines link quality data corresponding to the first scheduled user equipment according to ephemeris information corresponding to the first scheduled user equipment and high-orbit relay satellite ephemeris information;

[0007] The 5G base station determines a second scheduled user equipment from the first scheduled user equipment according to the link quality data; and determines a target scheduled user equipment according to a scheduling priority corresponding to the second scheduled user equipment;

[0008] The 5G base station sends a PDCCH channel carrying PUSCH channel dynamic scheduling information in a PDCCH receiving window when it detects that the telemetry service period of the target scheduling user equipment arrives, wherein the PUSCH channel dynamic scheduling information is dynamically allocated by the 5G base station according to the link quality data corresponding to the target scheduling user equipment.

[0009] The target scheduling user equipment continuously detects whether the corresponding PDCCH channel carrying PUSCH channel dynamic scheduling information is received in the PDCCH receiving window, and when the corresponding PDCCH channel carrying PUSCH channel dynamic scheduling information is received, the target scheduling user equipment sends a PUSCH channel carrying telemetry service data to the 5G base station, and / or sends a PUSCH channel carrying telemetry service data to the 5G base station.

[0010] When the 5G base station receives the PUSCH channel carrying telemetry service data, it performs data demodulation and decoding processing on the telemetry service data and forwards the telemetry service data to a third-party central device through a core network; and / or when the 5G base station receives the PUSCH channel carrying telemetry service data, it performs data demodulation and decoding processing on the telemetry service data and forwards the telemetry service data to a third-party central device through a core network.

[0011] In a second aspect, according to the content of the present disclosure, a low-orbit satellite data communication system is provided, comprising: a 5G base station and a target scheduling user equipment.

[0012] The 5G base station is configured to determine a first scheduling user equipment from a plurality of low-orbit satellite user equipments according to telemetry service requirements, determine link quality data corresponding to the first scheduling user equipment through ephemeris information corresponding to the first scheduling user equipment and high-orbit relay satellite ephemeris information, determine a second scheduling user equipment from the first scheduling user equipment according to the link quality data, determine a target scheduling user equipment according to a scheduling priority corresponding to the second scheduling user equipment, and send a PDCCH channel carrying PUSCH channel dynamic scheduling information in a PDCCH receiving window when it detects that the telemetry service period of the target scheduling user equipment arrives, wherein the PUSCH channel dynamic scheduling information is dynamically allocated by the 5G base station according to the link quality data corresponding to the target scheduling user equipment.

[0013] The target scheduling user equipment is configured to continuously detect whether the corresponding PDCCH channel carrying PUSCH channel dynamic scheduling information is received within the PDCCH receiving window, and when the corresponding PDCCH channel carrying PUSCH channel dynamic scheduling information is received, the target scheduling user equipment sends the PUSCH channel carrying telemetry service data to the 5G base station, and / or sends the PUSCH channel carrying telemetry service data to the 5G base station.

[0014] The 5G base station is further configured to, when the PUSCH channel carrying telemetry service data is received, perform data demodulation and decoding processing on the telemetry service data, and forward the telemetry service data to a third-party central device through a core network; and / or, when the PUSCH channel carrying telemetry service data is received, perform data demodulation and decoding processing on the telemetry service data, and forward the telemetry service data to a third-party central device through a core network.

[0015] In a third aspect, a computer device is provided, which includes a memory and a processor, the memory stores a computer program, and the processor implements the steps of the low-orbit satellite data communication method in any one of the above embodiments when executing the computer program.

[0016] In a fourth aspect, a computer readable storage medium is provided, which stores a computer program, and the computer program implements the steps of the low-orbit satellite data communication method in any one of the above embodiments when executed by a processor.

[0017] The low-orbit satellite data communication method provided by the embodiments of the present application, the 5G base station determines a first scheduled user equipment from a plurality of low-orbit satellite user equipments according to telemetry service requirements; and determines link quality data corresponding to the first scheduled user equipment through ephemeris information corresponding to the first scheduled user equipment and high-orbit relay satellite ephemeris information; the 5G base station determines a second scheduled user equipment from the first scheduled user equipment according to the link quality data; and determines a target scheduled user equipment according to a scheduling priority corresponding to the second scheduled user equipment; when the 5G base station detects that a telemetry service period of the target scheduled user equipment arrives, the 5G base station sends a PDCCH channel carrying PUSCH channel dynamic scheduling information in a PDCCH receiving window, the PUSCH channel dynamic scheduling information is obtained by the 5G base station through dynamic allocation according to the link quality data corresponding to the target scheduled user equipment; the target scheduled user equipment continuously detects whether the corresponding PDCCH channel carrying the PUSCH channel dynamic scheduling information is received in the PDCCH receiving window; and when the corresponding PDCCH channel carrying the PUSCH channel dynamic scheduling information is received, the target scheduled user equipment sends a PUSCH channel carrying telemetry service data to the 5G base station; and / or, sends a PUSCH channel carrying data transmission service data to the 5G base station; when the 5G base station receives the PUSCH channel carrying the telemetry service data, the 5G base station performs data demodulation and decoding processing on the telemetry service data, and forwards the telemetry service data to a third-party central equipment through a core network; and / or, when the 5G base station receives the PUSCH channel carrying the data transmission service data, the 5G base station performs data demodulation and decoding processing on the data transmission service data, and forwards the data transmission service data to the third-party central equipment through the core network. In this way, the low-orbit satellite user does not need to initiate a data transmission request through a random access mode, the 5G base station deployed on the ground can obtain link quality data by using ephemeris information of the low-orbit satellite user and high-orbit relay satellite ephemeris, and the 5G base station can dynamically allocate channel dynamic scheduling information according to the link quality data, thereby effectively improving the low-orbit satellite data communication efficiency.

[0018] The above description is only a summary of the technical solutions of the embodiments of the present application, in order to more clearly understand the technical means of the embodiments of the present application, the embodiments of the present application can be implemented according to the content of the specification, and in order to make the above and other purposes, characteristics and advantages of the embodiments of the present application more obvious and easy to understand, the following specific embodiments of the present application are described. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings of the embodiments will be briefly described below, it should be known that the drawings described below only relate to some embodiments of the present application, not limit the present application, wherein:

[0020] Figure 1 is a flowchart of a low-orbit satellite data communication method provided by the present application.

[0021] Figure 2 is a structural schematic diagram of a low-orbit satellite data communication system provided by the present disclosure.

[0022] Figure 3 is a structural schematic diagram of a computer device provided by the present disclosure.

[0023] It should be noted that the elements in the drawings are schematic and not drawn to scale. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be described clearly and completely below in conjunction with the drawings. Obviously, the described embodiments are part of the embodiments of the present disclosure, rather than all the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by a person skilled in the art without any inventive effort also belong to the scope of protection of the present disclosure.

[0025] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this present subject matter belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the specification and relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein. As used herein, the statement that two or more parts are "connected" or "coupled" together refer to an indirect or direct connection or coupling.

[0026] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase "in an embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive of one another. A person of ordinary skill in the art will readily recognize from the disclosure herein, given the total volume of this application that one or more passages that are described as an embodiment is / are also an embodiment of another embodiment.

[0027] The term "and / or", merely used as a description of associated objects, means that there can be three kinds of relations, for example, A and / or B, which can represent: there is A, there are A and B, and there is B. In addition, the character " / " herein generally represents that the front and rear associated objects are a "or" relationship. Terms such as "first" and "second" are merely used to distinguish one component (or part of a component) from another component (or another part of a component).

[0028] In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more (including two), and similarly, "a plurality of groups" means two or more groups (including two groups).

[0029] In order for those skilled in the art to better understand the scheme of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings.

[0030] Figure 1 is a flowchart of a low-orbit satellite data communication method provided by an embodiment of the present disclosure, as Figure 1 indicated, the specific process of the low-orbit satellite data communication method includes:

[0031] S110, the 5G base station determines a first scheduled user equipment from a plurality of low-orbit satellite user equipments according to telemetry service requirements; and determines link quality data corresponding to the first scheduled user equipment through ephemeris information corresponding to the first scheduled user equipment and high-orbit relay satellite ephemeris information.

[0032] Among them, the telemetry service requirement is the upcoming telemetry service period, and the 5G base station determines the first scheduled user equipment from the plurality of low-orbit satellite user equipments according to the telemetry service requirement, that is, determines the N low-orbit satellite user equipments that will arrive at the telemetry service period as the first scheduled user equipment.

[0033] The link quality data is, for example, the link quality SNR (signal-to-noise ratio). The determination of the link quality data corresponding to the first scheduled user equipment through the ephemeris information corresponding to the first scheduled user equipment and the high-orbit relay satellite ephemeris information can include: calculating the relative position relationship between the first scheduled user equipment and the high-orbit relay satellite according to the orbit parameters of the first scheduled user equipment and the orbit parameters of the high-orbit relay satellite; in combination with the signal transmission frequency and the antenna directivity, evaluating the propagation loss and interference of the communication link of the first scheduled user equipment; inputting the relative position relationship between the first scheduled user equipment and the high-orbit relay satellite, the propagation loss and interference of the communication link of the first scheduled user equipment into a signal-to-noise ratio model to obtain the link quality SNR.

[0034] In addition, the 5G base station can also calculate the dynamic position of the low-orbit satellite user equipment through the ephemeris information of the low-orbit satellite user equipment, which can be used to determine the pointing direction of the high-orbit relay satellite beam to improve the communication quality and signal coverage range, achieve weather forecasting and earth observation, etc.

[0035] S120, the 5G base station determines a second scheduled user equipment from the first scheduled user equipment according to the link quality data; and determines a target scheduled user equipment according to a scheduling priority corresponding to the second scheduled user equipment.

[0036] The 5G base station determines the second scheduling user equipment from the first scheduling user equipment according to the link quality data, for example, selects M low-orbit satellite user equipments with the maximum link quality SNR (e.g., exceeding a preset SNR threshold) from the first scheduling user equipment (i.e., the N low-orbit satellite user equipments mentioned above) as the second scheduling user equipment.

[0037] In some embodiments, the 5G base station determines the target scheduling user equipment according to the scheduling priority corresponding to the second scheduling user equipment, including:

[0038] The 5G base station obtains the average service rate of the current telemetry service rate and the historical telemetry service rate corresponding to the second scheduling user equipment, and determines the scheduling priority corresponding to the second scheduling user equipment according to the average service rate of the current telemetry service rate and the historical telemetry service rate corresponding to the second scheduling user equipment. The 5G base station selects the scheduling user equipment with a high scheduling priority from the second scheduling user equipment according to the scheduling priority corresponding to the second scheduling user equipment, and determines the scheduling user equipment with a high scheduling priority as the target scheduling user equipment.

[0039] The scheduling priority corresponding to the second scheduling user equipment can be measured according to the ratio of the average service rate of the current telemetry service rate and the historical telemetry service rate corresponding to the second scheduling user equipment. The larger the ratio of the average service rate of the current telemetry service rate and the historical telemetry service rate corresponding to the second scheduling user equipment, the higher the scheduling priority corresponding to the second scheduling user equipment. The smaller the ratio of the average service rate of the current telemetry service rate and the historical telemetry service rate corresponding to the second scheduling user equipment, the lower the scheduling priority corresponding to the second scheduling user equipment.

[0040] The 5G base station can select one or more scheduling user equipments with a high scheduling priority (e.g., a priority greater than a preset priority level) from the second scheduling user equipment as the target scheduling user equipment. Thus, the target scheduling user equipment with a high priority level can obtain better resource allocation in the low-orbit satellite communication environment, ensuring efficient transmission of telemetry services.

[0041] S130, when the 5G base station detects that the telemetry service period of the target scheduling user equipment arrives, the 5G base station sends a PDCCH channel carrying PUSCH channel dynamic scheduling information in a PDCCH receiving window.

[0042] The PUSCH channel dynamic scheduling information is dynamically allocated by the 5G base station according to the link quality data corresponding to the target scheduling user equipment. The PUSCH channel dynamic scheduling information can include time-frequency resources and code rates.

[0043] In some embodiments, the method further includes:

[0044] The 5G base station analyzes the current channel state and channel interference information of the target scheduling user equipment according to the link quality data of the target scheduling user equipment, and dynamically allocates the PUSCH channel dynamic scheduling information corresponding to the target scheduling user equipment according to the current residual time-frequency resource, the current channel state and channel interference information of the target scheduling user equipment.

[0045] The 5G base station can evaluate the stability and interference degree of the channel by combining the link quality data of the target scheduling user equipment with historical transmission records and real-time monitoring results to obtain the current channel state and channel interference information of the target scheduling user equipment. The better the current channel state of the target scheduling user equipment and the smaller the channel interference indicated by the channel interference information, the more time-frequency resources and the larger code rate can be dynamically allocated. The worse the current channel state of the target scheduling user equipment and the larger the channel interference indicated by the channel interference information, the less time-frequency resources and the smaller code rate can be dynamically allocated.

[0046] Therefore, by accurately analyzing the link quality data, the 5G base station can adjust the scheduling strategy in real time to ensure the best performance of the target scheduling user equipment under different channel conditions, effectively improve the resource utilization efficiency and transmission reliability of the communication system, and further improve the efficiency of satellite data communication.

[0047] S140, the target scheduling user equipment continuously detects whether the corresponding PDCCH channel carrying the PUSCH channel dynamic scheduling information is received within the PDCCH receiving window, and when the corresponding PDCCH channel carrying the PUSCH channel dynamic scheduling information is received, the target scheduling user equipment sends the PUSCH channel carrying the telemetry service data to the 5G base station, and / or sends the PUSCH channel carrying the data transmission service data to the 5G base station.

[0048] The target satellite user equipment can be used as an access node of the communication system, and can be used as a receiving end of remote control services, a sending end of telemetry services, and a data source of data transmission services. The target satellite user equipment is equipped with a 5G terminal chip, which can filter, denoise, convert digital signals and analog signals, modulate and demodulate, encode and decode, and perform physical layer protocol, link layer protocol, and network layer protocol processing on 5G wireless signals.

[0049] The target scheduling user equipment can continuously blind detect whether the 5G base station sends the PDCCH channel carrying the PUSCH channel dynamic scheduling information to itself in the PDCCH (Physical Downlink Control Channel) receiving window of the preconfigured telemetry service period. When the PDCCH channel carrying the PUSCH channel dynamic scheduling information is received, the telemetry service data and / or the data transmission service data are sent through the PDCCH dynamic scheduling PUSCH channel.

[0050] If the target scheduling user equipment detects the PDCCH dynamic scheduling PUSCH channel, the user needs to continuously open the PDCCH blind detection until the telemetry service data and / or the data transmission service data are completely sent. The telemetry service data can include but is not limited to satellite operation state information, orbit parameters, energy management system data, thermal control system data, attitude control system data, and payload working state information. The data transmission service data can include but is not limited to satellite image data, meteorological observation data, navigation positioning data, communication service data, and scientific research experiment data.

[0051] Some embodiments further include:

[0052] If the target scheduling user equipment does not receive the PDCCH channel carrying the PUSCH channel dynamic scheduling information, the corresponding device state is set to a sleep state in a preset period.

[0053] If the target scheduling user equipment does not detect the PDCCH in the preconfigured telemetry service period, it can be set to enter a device sleep state at other times (in a telemetry service period) to greatly reduce the power consumption of the user side device.

[0054] S150, when the 5G base station receives the PUSCH channel carrying the telemetry service data, the telemetry service data is processed by data demodulation and decoding, and the telemetry service data is forwarded to the third party central device through the core network; and / or, when the 5G base station receives the PUSCH channel carrying the data transmission service data, the data transmission service data is processed by data demodulation and decoding, and the data transmission service data is forwarded to the third party central device through the core network.

[0055] The 5G base station deployed on the ground receives the back wireless signal (i.e. PUSCH channel) sent by the user, and performs demodulation, decoding and other operations on the signal, restores the original data and transmits it to the external data network through the core network, and finally reaches the third party customer center (i.e. third party central device).

[0056] The 5G core network is responsible for authenticating and authorizing the identity of the user terminal, and recording the location and state of the user terminal by processing the location area registration process of the user terminal. The 5G core network can also select the optimal data transmission path according to the destination address of the data and the network policy, and forward the data to the user terminal or to the external data network. In the process of high-speed movement of the user, the 5G core network can also ensure the continuity of communication through mobility management. The external data network is an external network relative to the 5G network, which is responsible for routing data transmission service data to the final third-party customer center.

[0057] In this embodiment, the 5G base station determines the first scheduled user equipment from the plurality of low-orbit satellite user equipments according to the telemetry service requirement; and determines the link quality data corresponding to the first scheduled user equipment through the ephemeris information corresponding to the first scheduled user equipment and the ephemeris information of the high-orbit relay satellite; the 5G base station determines the second scheduled user equipment from the first scheduled user equipment according to the link quality data; and determines the target scheduled user equipment according to the scheduling priority corresponding to the second scheduled user equipment; when the 5G base station detects that the telemetry service period of the target scheduled user equipment arrives, the 5G base station sends the PDCCH channel carrying the PUSCH channel dynamic scheduling information in the PDCCH receiving window, and the PUSCH channel dynamic scheduling information is dynamically allocated by the 5G base station according to the link quality data corresponding to the target scheduled user equipment; the target scheduled user equipment continuously detects whether the corresponding PDCCH channel carrying the PUSCH channel dynamic scheduling information is received in the PDCCH receiving window; and when the corresponding PDCCH channel carrying the PUSCH channel dynamic scheduling information is received, the target scheduled user equipment sends the PUSCH channel carrying the telemetry service data to the 5G base station; and / or, the target scheduled user equipment sends the PUSCH channel carrying the data transmission service data to the 5G base station; when the 5G base station receives the PUSCH channel carrying the telemetry service data, the 5G base station performs data demodulation and decoding processing on the telemetry service data, and forwards the telemetry service data to the third-party center equipment through the core network; and / or, when the 5G base station receives the PUSCH channel carrying the data transmission service data, the 5G base station performs data demodulation and decoding processing on the data transmission service data, and forwards the data transmission service data to the third-party center equipment through the core network. In this way, the low-orbit satellite user does not need to initiate a data transmission request through a random access method, and the 5G base station deployed on the ground can obtain link quality data using the ephemeris information of the low-orbit satellite user and the ephemeris of the high-orbit relay satellite, and dynamically allocate channel dynamic scheduling information according to the link quality data. The 5G base station can effectively improve the efficiency of low-orbit satellite data communication.

[0058] In some embodiments, before the target scheduled user equipment sends the PUSCH channel carrying the telemetry service data to the 5G base station, it further includes:

[0059] If the target scheduling user equipment detects that there is currently first to-be-transmitted service data, the target scheduling user equipment generates corresponding BSR information according to the first to-be-transmitted service data; and the target scheduling user equipment adds the BSR information corresponding to the first to-be-transmitted service data into the PUSCH channel carrying the telemetry service data.

[0060] The first to-be-transmitted service data can be used to describe telemetry service data and / or telemetric service data that still need to be transmitted in the current state of the target scheduling user equipment. If the user still has telemetric service data and / or telemetry service data to be transmitted at this time, the amount of telemetric service data and telemetry service data that still need to be transmitted is notified to the 5G base station in the form of adding BSR (Buffer Status Report) information corresponding to the first to-be-transmitted service data on the PUSCH channel.

[0061] In some embodiments, before the target scheduling user equipment sends the PUSCH channel carrying the telemetric service data to the 5G base station, the target scheduling user equipment further includes:

[0062] If the target scheduling user equipment detects that there is currently second to-be-transmitted service data, the target scheduling user equipment generates corresponding BSR information according to the second to-be-transmitted service data; and the target scheduling user equipment adds the BSR information corresponding to the second to-be-transmitted service data into the PUSCH channel carrying the telemetric service data.

[0063] The second to-be-transmitted service data can be used to describe telemetry service data and / or telemetric service data that still need to be transmitted in the current state of the target scheduling user equipment. If the user still has telemetric service data and / or telemetry service data to be transmitted at this time, the amount of telemetric service data and telemetry service data that still need to be transmitted is notified to the 5G base station in the form of adding BSR information corresponding to the second to-be-transmitted service data on the PUSCH channel.

[0064] In some embodiments, the method further includes:

[0065] If the PUSCH channel carrying the telemetry service data received by the 5G base station contains the BSR information corresponding to the first to-be-transmitted service data, the PUSCH channel dynamic scheduling information is updated according to the first to-be-transmitted service data; and if the PUSCH channel carrying the telemetric service data received by the 5G base station contains the BSR information corresponding to the second to-be-transmitted service data, the PUSCH channel dynamic scheduling information is updated according to the second to-be-transmitted service data.

[0066] If the 5G base station receives a BSR in the PUSCH channel carrying telemetry service data and / or data transmission service data of a low-orbit satellite user, the 5G base station can update the dynamic time-frequency resource and code rate configuration of the PUSCH channel according to the BSR, so that the subsequent PUSCH carries either telemetry service data or data transmission service data.

[0067] In summary, the embodiment eliminates the process of 5G random access in the conventional mode, saves the energy consumption of multiple rounds of air interface signaling interaction in the random access process: the user does not need to perform operations such as random access preamble sending, frequent activation of the radio frequency module (for listening to the base station response), synchronization calculation (time / frequency offset adjustment), etc., which will repeatedly consume energy when access fails; at the same time, the energy consumption of the high-orbit relay satellite forwarding related signaling is saved. The access delay is greatly reduced, and the real-time performance is improved: the random access process itself has inherent delay (including preamble sending, base station response, contention resolution, etc.), and if the process is omitted, the start delay of uplink data / signaling can be greatly compressed. Reducing air interface resource waste and improving spectrum efficiency: in the random access process, the preamble, random access response (RAR), contention resolution signaling, etc. will occupy dedicated air interface resources (such as PRACH channel, signaling resources in PDSCH / PUSCH), and conflict retransmission will further consume resources; after omission, these resources can be released for transmission of actual service data, especially in high-load scenarios, which can reduce resource congestion caused by the access process and improve the overall network throughput.

[0068] Figure 2 A structure diagram of a low-orbit satellite data communication system provided by the embodiment is shown in FIG. 1. The low-orbit satellite data communication system can include a 5G base station 210 and a target scheduling user equipment 220.

[0069] The 5G base station 210 is configured to determine a first scheduling user equipment from a plurality of low-orbit satellite user equipments according to telemetry service requirements; determine link quality data corresponding to the first scheduling user equipment through ephemeris information corresponding to the first scheduling user equipment and high-orbit relay satellite ephemeris information; determine a second scheduling user equipment from the first scheduling user equipment according to the link quality data; determine a target scheduling user equipment according to a scheduling priority corresponding to the second scheduling user equipment; and when detecting that a telemetry service period of the target scheduling user equipment arrives, send a PDCCH channel carrying PUSCH channel dynamic scheduling information in a PDCCH receiving window, wherein the PUSCH channel dynamic scheduling information is obtained by the 5G base station dynamically according to the link quality data corresponding to the target scheduling user equipment.

[0070] The target scheduling user equipment 220 is configured to continuously detect whether the corresponding PDCCH channel carrying PUSCH channel dynamic scheduling information is received within a PDCCH receiving window, and transmit the PUSCH channel carrying telemetry service data to the 5G base station, and / or transmit the PUSCH channel carrying data transmission service data to the 5G base station when the corresponding PDCCH channel carrying PUSCH channel dynamic scheduling information is received.

[0071] The 5G base station 210 is further configured to perform data demodulation and decoding processing on the telemetry service data when the PUSCH channel carrying telemetry service data is received, and forward the telemetry service data to a third-party central device through a core network, and / or perform data demodulation and decoding processing on the data transmission service data when the PUSCH channel carrying data transmission service data is received, and forward the data transmission service data to the third-party central device through the core network.

[0072] In this embodiment, optionally, the 5G base station 210 is specifically configured to:

[0073] obtain the average service rate of the current telemetry service rate and the historical telemetry service rate corresponding to the second scheduling user equipment, and determine the scheduling priority corresponding to the second scheduling user equipment according to the average service rate of the current telemetry service rate and the historical telemetry service rate corresponding to the second scheduling user equipment, select the scheduling user equipment with a high scheduling priority from the second scheduling user equipment according to the scheduling priority corresponding to the second scheduling user equipment, and determine the scheduling user equipment with the high scheduling priority as the target scheduling user equipment.

[0074] In this embodiment, optionally, the target scheduling user equipment 220 is further configured to generate corresponding BSR information according to the first to-be-transmitted service data if it is detected that the current corresponds to the first to-be-transmitted service data, and add the BSR information corresponding to the first to-be-transmitted service data into the PUSCH channel carrying telemetry service data.

[0075] In this embodiment, optionally, the target scheduling user equipment 220 is further configured to generate corresponding BSR information according to the second to-be-transmitted service data if it is detected that the current corresponds to the second to-be-transmitted service data, and add the BSR information corresponding to the second to-be-transmitted service data into the PUSCH channel carrying data transmission service data.

[0076] In this embodiment, optionally, the 5G base station 210 is further configured to update the PUSCH channel dynamic scheduling information according to the first to-be-transmitted service data if the BSR information corresponding to the first to-be-transmitted service data is included in the received PUSCH channel carrying telemetry service data, and update the PUSCH channel dynamic scheduling information according to the second to-be-transmitted service data if the BSR information corresponding to the second to-be-transmitted service data is included in the received PUSCH channel carrying data transmission service data.

[0077] In this embodiment, optionally, the target scheduling user equipment 220 is further configured to set the corresponding device state as a sleep state in a preset period of time if the corresponding bearer PUSCH channel dynamic scheduling information is not received.

[0078] In this embodiment, optionally, the 5G base station 210 is further configured to analyze the current channel state and channel interference information of the target scheduling user equipment according to the link quality data of the target scheduling user equipment, and dynamically allocate the PUSCH channel dynamic scheduling information corresponding to the target scheduling user equipment according to the current residual time-frequency resource, the current channel state and channel interference information of the target scheduling user equipment.

[0079] The low-orbit satellite data communication system provided by the present disclosure can execute the above-mentioned method embodiments, and the specific implementation principles and technical effects can be referred to the above-mentioned method embodiments, which will not be described here again.

[0080] The present application also provides a computer device. For details, please refer to Figure 3 , Figure 3 The following is a basic structure block diagram of the computer device of the present embodiment.

[0081] The computer device includes a memory 310 and a processor 320 which are connected to each other for communication through a system bus. It should be noted that only the computer device with the memory 310 and the processor 320 is shown in the figure, but it should be understood that it is not required to implement all the shown components, and more or fewer components can be alternatively implemented. Among them, those skilled in the art can understand that the computer device herein is a device that can automatically perform numerical calculation and / or information processing according to pre-set or stored instructions, and its hardware includes but is not limited to microprocessors, application specific integrated circuits (ASICs), field programmable gate arrays (FPGAs), digital signal processors (DSPs), embedded devices, etc.

[0082] The computer device can be a desktop computer, a notebook, a palm computer, and a cloud server, etc. The computer device can interact with the user through a keyboard, a mouse, a remote controller, a touchpad, or a voice control device, etc.

[0083] The memory 310 includes at least one type of readable storage medium, including non-volatile memory or volatile memory, for example, flash memory, a hard disk, a multimedia card, a card-type memory (e.g., SD or DX memory, etc.), random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), programmable read-only memory (PROM), a magnetic memory, a magnetic disk, an optical disk, etc. The RAM can include static RAM or dynamic RAM. In some embodiments, the memory 310 can be an internal storage unit of the computer device, for example, a hard disk or a memory of the computer device. In other embodiments, the memory 310 can also be an external storage device of the computer device, for example, a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) card, or a flash card, etc. equipped on the computer device. Of course, the memory 310 can include both an internal storage unit and an external storage device of the computer device. In the present embodiment, the memory 310 is generally used to store an operating system and various application software installed on the computer device, for example, program codes of the above-described method, etc. In addition, the memory 310 can also be used to temporarily store various data that has been output or will be output.

[0084] The processor 320 is generally used to perform the overall operation of the computer device. In the present embodiment, the memory 310 is used to store program codes or instructions, including computer operation instructions, and the processor 320 is used to execute the program codes or instructions stored in the memory 310 or process data, for example, run the program codes of the above-described method.

[0085] In this article, the bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus, etc. The bus system can be divided into address bus, data bus, control bus, etc. For the convenience of representation, only one thick line is used in the figure, but it does not mean that there is only one bus or one type of bus.

[0086] Another embodiment of the present application also provides a computer readable medium, which can be a computer readable signal medium or a computer readable medium. The processor in the computer reads the computer readable program code stored in the computer readable medium, so that the processor can perform the function actions specified in each step or combination of steps in the above method; generate the device implementing the function actions specified in each block or combination of blocks in the block diagram.

[0087] The computer readable medium includes but is not limited to electronic, magnetic, optical, electromagnetic, infrared, semiconductor system, device or apparatus, or any appropriate combination of the foregoing, for storing program code or instructions, including computer operation instructions, and processor for executing the program code or instructions of the above method stored in the memory.

[0088] The definition of memory and processor can refer to the description of the foregoing computer device embodiment, which will not be repeated here.

[0089] In several embodiments provided in the present application, it should be understood that the disclosed system, device and method can be implemented in other ways. For example, the device embodiment described above is only schematic, for example, the division of modules or units is only a logical function division, and actual implementation can have another division manner, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the displayed or discussed each other can be through some interface, indirect coupling or communication connection between the units or devices, which can be electrical, mechanical or other forms.

[0090] The function units or modules in each embodiment of the present application can be integrated in one processing unit, or each unit can exist physically, or two or more units can be integrated in one unit. The integrated unit can be realized in the form of hardware or in the form of software function unit.

[0091] If the integrated unit is implemented in the form of a software function unit and sold or used as an independent product, it can be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the present application essentially or say the part that contributes to the prior art or the whole or part of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes a number of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) or a processor (processor) to execute all or part of the steps of the various embodiments of the method of the present application. The aforementioned storage medium includes: a U disk, a mobile hard disk, a read-only memory (Read-Only Memory, ROM), a random access memory (Random Access Memory, RAM), a magnetic disk or an optical disk, and various program code storage media.

[0092] In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The application can be implemented by means of both hardware and software, and any combination thereof. In the claims, the word "comprising" does not exclude the presence of other elements or steps than those listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The application can be implemented by means of both hardware and software, and any combination thereof. The use of the terms "first", "second" and "third", etc. does not limit the number of these elements, but these terms are only used to distinguish between two or more elements. The use of the terms "first", "second", and "third", etc. does not limit the number of these elements, but these terms are only used to distinguish between two or more elements. The steps of the above embodiments should not be understood as limiting the execution order, unless otherwise specified.

[0093] The above embodiments are only used to illustrate the technical solutions of the present application, not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent replacements for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A low-Earth orbit satellite data communication method, characterized in that, include: The 5G base station determines the first scheduling user equipment from multiple low-orbit satellite user equipment according to telemetry service requirements; The link quality data corresponding to the first scheduling user equipment is determined by using the ephemeris information corresponding to the first scheduling user equipment and the ephemeris information of the high-orbit relay satellite. The 5G base station determines the second scheduling user equipment from the first scheduling user equipment based on the link quality data; The target scheduling user equipment is determined based on the scheduling priority corresponding to the second scheduling user equipment; The 5G base station analyzes the current channel status and channel interference information of the target scheduled user equipment based on the link quality data of the target scheduled user equipment; Based on the remaining time-frequency resources, the current channel state of the target scheduled user equipment, and channel interference information, dynamic scheduling information of the PUSCH channel corresponding to the target scheduled user equipment is dynamically allocated. When the 5G base station detects that the telemetry service period of the target scheduling user equipment has arrived, it sends a PDCCH channel carrying the dynamic scheduling information of the PUSCH channel within the PDCCH receiving window. The target scheduling user equipment continuously detects within the PDCCH receiving window whether it receives the corresponding PDCCH channel carrying dynamic scheduling information of the PUSCH channel. Upon receiving the corresponding PDCCH channel carrying dynamic scheduling information for the PUSCH channel, the system sends a PUSCH channel carrying telemetry service data to the 5G base station; and / or sends a PUSCH channel carrying data transmission service data to the 5G base station. When the 5G base station receives the PUSCH channel carrying telemetry service data, it performs data demodulation and decoding processing on the telemetry service data and forwards the telemetry service data to a third-party central device through the core network; and / or, when the 5G base station receives the PUSCH channel carrying data transmission service data, it performs data demodulation and decoding processing on the data transmission service data and forwards the data transmission service data to a third-party central device through the core network.

2. The method according to claim 1, characterized in that, The 5G base station determines the target scheduling user equipment based on the scheduling priority corresponding to the second scheduling user equipment, including: The 5G base station obtains the average service rate of the current telemetry service rate and the historical telemetry service rate corresponding to the second scheduling user equipment; and determines the scheduling priority corresponding to the second scheduling user equipment based on the average service rate of the current telemetry service rate and the historical telemetry service rate corresponding to the second scheduling user equipment. The 5G base station selects a scheduling user equipment with a higher scheduling priority from the second scheduling user equipment according to the scheduling priority corresponding to the second scheduling user equipment, and determines the scheduling user equipment with the higher scheduling priority as the target scheduling user equipment.

3. The method according to claim 1, characterized in that, Before the target scheduling user equipment sends the PUSCH channel carrying telemetry service data to the 5G base station, it also includes: If the target scheduling user equipment detects that there is a first service data to be transmitted, it generates corresponding BSR information based on the first service data to be transmitted. The target scheduling user equipment adds the BSR information corresponding to the first data to be transmitted service to the PUSCH channel carrying the telemetry service data.

4. The method according to claim 3, characterized in that, Before the target scheduling user equipment sends the PUSCH channel carrying data transmission service data to the 5G base station, it also includes: If the target scheduling user equipment detects that there is currently a second service data to be transmitted, it generates corresponding BSR information based on the second service data to be transmitted. The target scheduling user equipment adds the BSR information corresponding to the second pending service data to the PUSCH channel carrying the data transmission service data.

5. The method according to claim 4, characterized in that, Also includes: If the PUSCH channel carrying the telemetry service data received by the 5G base station contains BSR information corresponding to the first service data to be transmitted, then the dynamic scheduling information of the PUSCH channel is updated according to the first service data to be transmitted. If the PUSCH channel carrying the data transmission service data received by the 5G base station contains BSR information corresponding to the second data to be transmitted, then the dynamic scheduling information of the PUSCH channel is updated according to the second data to be transmitted.

6. The method according to claim 1, characterized in that, Also includes: If the target scheduling user equipment does not receive the corresponding PDCCH channel carrying dynamic scheduling information of the PUSCH channel, the corresponding device status is set to a sleep state for a preset period of time.

7. A low-Earth orbit satellite data communication system, characterized in that, This includes: 5G base stations and target scheduling user equipment; The 5G base station is used to determine the first scheduling user equipment from multiple low-orbit satellite user equipment according to telemetry service requirements; The link quality data corresponding to the first scheduling user equipment is determined by using the ephemeris information corresponding to the first scheduling user equipment and the ephemeris information of the high-orbit relay satellite; and the second scheduling user equipment is determined from the first scheduling user equipment based on the link quality data. The target scheduling user equipment is determined based on the scheduling priority corresponding to the second scheduling user equipment; Based on the link quality data of the target scheduled user equipment, analyze the current channel state and channel interference information of the target scheduled user equipment; Based on the remaining time-frequency resources, the current channel state of the target scheduled user equipment, and channel interference information, the PUSCH channel dynamic scheduling information corresponding to the target scheduled user equipment is dynamically allocated; when the telemetry service period of the target scheduled user equipment is detected to arrive, the PDCCH channel carrying the PUSCH channel dynamic scheduling information is sent within the PDCCH receiving window. The target scheduling user equipment is used to continuously detect whether it receives the corresponding PDCCH channel carrying dynamic scheduling information of the PUSCH channel within the PDCCH receiving window. Upon receiving the corresponding PDCCH channel carrying dynamic scheduling information for the PUSCH channel, the system sends a PUSCH channel carrying telemetry service data to the 5G base station; and / or sends a PUSCH channel carrying data transmission service data to the 5G base station. The 5G base station is further configured to, upon receiving the PUSCH channel carrying the telemetry service data, perform data demodulation and decoding processing on the telemetry service data, and forward the telemetry service data to a third-party central device through the core network; and / or, upon receiving the PUSCH channel carrying the data transmission service data, perform data demodulation and decoding processing on the data transmission service data, and forward the data transmission service data to a third-party central device through the core network.

8. The system according to claim 7, characterized in that, The 5G base station is specifically used for: Obtain the average service rate of the current telemetry service rate and the historical telemetry service rate corresponding to the second scheduling user equipment; and determine the scheduling priority corresponding to the second scheduling user equipment based on the average service rate of the current telemetry service rate and the historical telemetry service rate corresponding to the second scheduling user equipment. Based on the scheduling priority corresponding to the second scheduling user equipment, a scheduling user equipment with a higher scheduling priority is selected from the second scheduling user equipment, and the scheduling user equipment with the higher scheduling priority is determined as the target scheduling user equipment.

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