Satellite-to-Ground Network Communication Link Selection Methods, Systems, Storage Media, and Terminals

Abstract

This invention provides a method, system, storage medium, and terminal for selecting satellite-to-ground network communication links. When at least two available satellite-to-ground links exist, the method extracts high-dimensional statistical features of the transmitted signals on each link; obtains the status information of the corresponding satellite-to-ground link based on the high-dimensional statistical features; selects the optimal link from the at least two available links based on the status information; transmits signals based on the optimal link; and maps the status information of the transmitted signal onto the high-dimensional statistical features of the optimal link. This invention, based on the high-dimensional statistical features of satellite-to-ground links, effectively improves the transmission performance of integrated space-ground networks.

Description

Technical Field

[0001] This invention relates to the field of wireless communication technology, and in particular to a method, system, storage medium, and terminal for selecting communication links in a satellite-to-ground network. Background Technology

[0002] With the gradual maturation of satellite communication technology, research and standardization work on integrated space-ground networks has been launched. The 3rd Generation Partnership Project (3GPP) has initiated research on non-terrestrial network (NTN) communication technologies, defining and discussing their application scenarios, network architecture, potential technical issues, and corresponding solutions. Integrated space-ground networks will become an indispensable part of the 6th Generation (6G) mobile communication system. Furthermore, integrated space-ground networks can provide global network coverage and continuous communication services around the clock.

[0003] Space-ground integrated networks represent a crucial direction for future scientific and technological development. However, with the ever-increasing demand for information services and the explosive growth in the number of terminals, intelligent and efficient wireless resource management within these networks remains a significant challenge. The space-based component of a space-ground integrated network consists of satellites at different orbital altitudes and with varying mobility characteristics, resulting in a highly dynamic network architecture. These characteristics present challenges for satellite link selection, terminal access, resource scheduling, and mobility management.

[0004] Specifically, the integrated space-ground network should be able to provide services for various space-based, ground-based, and marine information services. The quality of service requirements for different services vary greatly, and the arrival patterns of these services exhibit uneven characteristics across time and space. Given these diverse service demands, further research is needed to determine how to achieve rational resource allocation and optimized selection of communication links within the integrated space-ground network. Summary of the Invention

[0005] In view of the shortcomings of the prior art described above, the purpose of this invention is to provide a method, system, storage medium, and terminal for selecting satellite-to-ground network communication links, which effectively improves the transmission performance of the integrated space-ground network based on the high-dimensional statistical characteristics of satellite-to-ground links.

[0006] To achieve the above and other related objectives, the present invention provides a method for selecting a satellite-to-ground network communication link, comprising the following steps: when at least two available satellite-to-ground links exist, extracting high-dimensional statistical features of the transmitted signals on each satellite-to-ground link; obtaining the status information of the corresponding satellite-to-ground link based on the high-dimensional statistical features; selecting the optimal link from the at least two available satellite-to-ground links based on the status information of the satellite-to-ground link; transmitting signals based on the optimal link, and mapping the status information of the transmitted signals onto the high-dimensional statistical features of the optimal link.

[0007] In one embodiment of the present invention, the high-dimensional statistical features of the transmitted signals on each satellite-to-ground link are extracted using any of the following methods:

[0008] 1) Based on the spatial domain coherence of the transmitted signal;

[0009] 2) Based on the time-domain coherence of the transmitted signal;

[0010] 3) Based on the frequency domain coherence of the transmitted signal.

[0011] In one embodiment of the present invention, the status information of the satellite-to-ground link includes one or more combinations of data rate, access probability, latency, energy efficiency, and mobility requirements.

[0012] In one embodiment of the present invention, the optimal link is selected from at least two available satellite-to-ground links based on the status information of the satellite-to-ground link using any of the following methods:

[0013] 1) The optimal link is selected solely based on the status information of the satellite-to-ground link;

[0014] 2) Select the optimal link by combining the status information of the satellite-to-ground link and the user transmission requirement information.

[0015] In one embodiment of the present invention, the user transmission requirement information includes one or more combinations of service requirements, mobility characteristics, and user preferences.

[0016] In one embodiment of the present invention, a high-dimensional information interaction channel is constructed, and the corresponding satellite-to-ground link status information is obtained from the high-dimensional information interaction channel based on the high-dimensional statistical features.

[0017] In one embodiment of the present invention, the state information of the transmitted signal and the high-dimensional statistical features have a preset correspondence.

[0018] This invention provides a satellite-to-ground network communication link selection system, comprising an extraction module, an acquisition module, a selection module, and a transmission module;

[0019] The extraction module is used to extract high-dimensional statistical features of the transmitted signals on each satellite-to-ground link when there are at least two available satellite-to-ground links.

[0020] The acquisition module is used to acquire the status information of the corresponding satellite-to-ground link based on the high-dimensional statistical features;

[0021] The selection module is used to select the best link from at least two available satellite-to-ground links based on the status information of the satellite-to-ground link.

[0022] The transmission module is used to transmit signals based on the optimal link and to map the state information of the transmitted signal onto the high-dimensional statistical features of the optimal link.

[0023] The present invention provides a storage medium storing a computer program thereon, which, when executed by a processor, implements the above-described method for selecting satellite-to-ground network communication links.

[0024] This invention provides a satellite-to-ground network communication link selection terminal, comprising: a processor and a memory;

[0025] The memory is used to store computer programs;

[0026] The processor is used to execute the computer program stored in the memory, so that the satellite-to-ground network communication link selection terminal performs the above-described satellite-to-ground network communication link selection method.

[0027] As described above, the satellite-to-ground network communication link selection method, system, storage medium, and terminal of the present invention have the following beneficial effects:

[0028] (1) Utilize the inherent coherence of signals from user terminal equipment to construct high-dimensional statistical features of transmitted signals, and select communication links in the space-ground network based on the high-dimensional information interaction channel;

[0029] (2) It can improve the utilization rate of communication link resources in the integrated space-ground network and enhance the overall network performance;

[0030] (3) It has a wide range of applications and does not conflict with the existing mainstream communication network link selection technology, and can work together further.

[0031] (4) It is easy to implement, requires no modification to the existing system's hardware structure, and is convenient for practical promotion and application. Attached Figure Description

[0032] Figure 1 The flowchart shown is an embodiment of the satellite-to-ground network communication link selection method of the present invention;

[0033] Figure 2The diagram shows a framework schematic of the satellite-to-ground network communication link selection method of the present invention in one embodiment;

[0034] Figure 3 The diagram shown is a structural schematic of the satellite-to-ground network communication link selection system of the present invention in one embodiment.

[0035] Figure 4 The diagram shown is a structural schematic of a satellite-to-ground network communication link selection terminal according to an embodiment of the present invention.

[0036] Component designation explanation

[0037] 31 Extraction Module

[0038] 32 Acquisition Module

[0039] 33 Select Module

[0040] 34 Transmission Module

[0041] 41 processors

[0042] 42 Memory Detailed Implementation

[0043] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, unless otherwise specified, the following embodiments and features described therein can be combined with each other.

[0044] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the drawings only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0045] The satellite-to-ground network communication link selection method, system, storage medium, and terminal of the present invention optimize the selection of communication links in the satellite-to-ground network based on the high-dimensional statistical characteristics of satellite-to-ground links, effectively improving the transmission performance of the integrated space-ground network and enhancing the overall network performance, making it highly practical.

[0046] like Figure 1 As shown, in one embodiment, the satellite-to-ground network communication link selection method of the present invention includes the following steps:

[0047] Step S1: When there are at least two available satellite-to-ground links, extract the high-dimensional statistical features of the transmitted signals on each satellite-to-ground link.

[0048] Specifically, in a satellite-to-ground communication network, when a user requests signal transmission, the first step is to explore the currently available satellite-to-ground links. If no available satellite-to-ground link is found, the current transmission task is terminated, and the process waits for the next round. If only one available satellite-to-ground link is available, that link is directly selected for signal transmission. If at least two available satellite-to-ground links exist, one of them must be selected as the optimal link for signal transmission. Therefore, it is necessary to extract high-dimensional statistical features of the transmitted signals on each satellite-to-ground link.

[0049] In this invention, the high-dimensional statistical features are generated based on the intrinsic correlation of the transmitted signals. In one embodiment of this invention, the high-dimensional statistical features of the transmitted signals on each satellite-to-ground link are extracted using any of the following methods:

[0050] 1) Based on the spatial domain coherence of the transmitted signal.

[0051] Specifically, by configuring multiple antennas and using multiple transmitting antennas to transmit similar signals, the transmitted signals are actively made to generate content repetition in the spatial dimension, thereby constructing artificially generated high-dimensional statistical features.

[0052] 2) Based on the time-domain coherence of the transmitted signal.

[0053] Specifically, by using delayed autocorrelation operations, the transmitted signal is actively made to repeat content in the time dimension, thereby constructing artificially generated high-dimensional statistical features.

[0054] 3) Based on the frequency domain coherence of the transmitted signal.

[0055] Specifically, through subcarrier mapping operations, the transmitted signal is actively made to repeat content in the frequency dimension, thereby constructing artificially generated high-dimensional statistical features.

[0056] For example, a user configures two transmit antennas and uses orthogonal frequency division multiplexing (OFDM) technology to transmit signals. The transmitted signal on an available satellite-to-ground link can be represented as r(n) = hs(n) + v(n), where h = [h1, h2] represents the channel state between the user's two transmit antennas and user A on that link, and s(n) = [s1(n), s2(n)]. T This indicates that a user's source signal is being transmitted on the link. The first antenna transmits signal s1(n), while the second antenna transmits s1(n) after cyclically shifting it by Δ units, i.e., the transmitted signal on the second antenna is s2(n) = s1(n)e^(-Δt). -j2πΔ / NWhere N represents the total number of subcarriers, and v(n) represents additive white Gaussian noise. User A estimates the cyclic autocorrelation function of the detected transmitted signal r(n): L represents the observation window length, and τ represents the loop delay variable. M = number of subcarriers + cyclic prefix length, where (·)* represents the conjugate operation. The formula for calculating the instantaneous high-dimensional statistical feature sequence Δ is:

[0057] Step S2: Obtain the status information of the corresponding satellite-to-ground link based on the high-dimensional statistical features.

[0058] Specifically, the mapping relationship based on the pre-stored high-dimensional statistical feature sequence lookup table of the satellite-to-ground link can be demapped into binary data, which is the corresponding satellite-to-ground link status information. For example, if the system mapping relationship is an 8-bit binary natural conversion relationship, then the detected instantaneous high-dimensional statistical feature sequence Δ = 31 can be mapped into binary data (00011001). Thus, user A obtains optional link status information represented by high-dimensional statistical features from the transmission signal on a certain optional satellite-to-ground link, in addition to service communication data. The satellite-to-ground link status information includes one or more combinations of data rate, access probability, latency, energy efficiency, and mobility requirements.

[0059] In one embodiment of the present invention, the satellite-to-ground network communication link selection method of the present invention further constructs a high-dimensional information interaction channel. The high-dimensional information interaction channel pre-stores a high-dimensional statistical feature sequence lookup table, which enables the mapping between the high-dimensional statistical features and the status information of the satellite-to-ground link. Therefore, based on the high-dimensional statistical features, the corresponding status information of the satellite-to-ground link can be obtained from the high-dimensional information interaction channel.

[0060] Step S3: Select the best link from the at least two available satellite-to-ground links based on the status information of the satellite-to-ground link.

[0061] Specifically, based on the status information of the satellite-to-ground link, the optimal link is selected from the at least two available satellite-to-ground links using any of the following methods:

[0062] 1) Select the best link based solely on the status information of the satellite-to-ground link.

[0063] 2) Select the optimal link by combining the status information of the satellite-to-ground link and the user transmission requirement information. The user transmission requirement information includes one or more combinations of service requirements, mobility characteristics, and user preferences. It should be noted that different users may select the same or different user transmission requirement information, depending on the actual application scenario.

[0064] Step S4: Transmit signals based on the optimal link and map the state information of the transmitted signals onto the high-dimensional statistical features of the optimal link.

[0065] Specifically, for the satellite-to-ground link selected by the user, when transmitting signals, the state information of the transmitted signal also needs to be mapped onto the high-dimensional statistical characteristics of the optimal link.

[0066] First, user A maps the state information sequence of the binary transmission signal into a dynamic high-dimensional statistical feature sequence Δ according to the high-dimensional statistical feature sequence lookup table pre-stored in the satellite-to-ground link. A The first antenna transmits signal s. A1 (n), and on the second antenna, s A1 (n) After cyclic shifting by Δ units, the signal s is transmitted on the second antenna. A2 (n)=s A1 (n)e -j2πΔ / N .

[0067] In one embodiment of the present invention, the type of status information of the transmission signals provided by different users to the high-dimensional information interaction channel can be unified, or it can be customized according to the differences between users.

[0068] The method for selecting satellite-to-ground network communication links of the present invention will be further described below based on specific embodiments.

[0069] In this embodiment, the user configures two transmitting antennas and uses orthogonal frequency division multiplexing (OFDM) technology to transmit signals. For example... Figure 2 As shown, the specific steps include:

[0070] Step 1: User A in the satellite-to-ground communication network generates a transmission request.

[0071] Step 2: User A explores available satellite-to-ground links and confirms the currently available set of satellite-to-ground links, D.

[0072] Step 3: If there is no available satellite-to-ground link, proceed to Step 4; otherwise, proceed to Step 5.

[0073] Step 4: User A aborts the current transmission task, this round ends, and the user waits for the next round.

[0074] Step 5: User A checks if any element in the optional link set D is greater than 1. If not, proceed to step 6; otherwise, proceed to step 7.

[0075] Step 6: User A directly selects the only available link for transmission and skips to step 9.

[0076] Step 7: User A performs high-dimensional statistical feature extraction on the transmission signals of all links in the set of optional links D, and demaps to obtain the status information of the optional links.

[0077] Step 8: Based on the obtained status information of each optional link, and optionally in combination with user A's own needs, select the best link from the optional links, and jump to step 9.

[0078] Step 9: During the transmission process, user A maps some of its own transmission status information onto the high-dimensional statistical features of the signal.

[0079] Step 10: User A has completed the transmission, this round ends, and the user waits for the next round.

[0080] like Figure 3 As shown, in one embodiment, the satellite-to-ground network communication link selection system of the present invention includes an extraction module 31, an acquisition module 32, a selection module 33, and a transmission module 34.

[0081] The extraction module 31 is used to extract high-dimensional statistical features of the transmitted signals on each satellite-to-ground link when there are at least two available satellite-to-ground links.

[0082] The acquisition module 32 is connected to the extraction module 31 and is used to acquire the status information of the corresponding satellite-to-ground link based on the high-dimensional statistical features.

[0083] The selection module 33 is connected to the acquisition module 32 and is used to select the best link from at least two available satellite-to-ground links based on the status information of the satellite-to-ground link.

[0084] The transmission module 34 is connected to the selection module 33 and is used to transmit signals based on the optimal link and map the state information of the transmitted signal onto the high-dimensional statistical features of the optimal link.

[0085] The structure and principle of the extraction module 31, the acquisition module 32, the selection module 33 and the transmission module 34 correspond one-to-one with the steps in the above-mentioned satellite-to-ground network communication link selection method, so they will not be described again here.

[0086] It should be noted that the division of the various modules in the above device is merely a logical functional division. In actual implementation, they can be fully or partially integrated into a single physical entity, or they can be physically separated. Furthermore, these modules can be implemented entirely in software via processing element calls, entirely in hardware, or partially in software calls via processing elements and partially in hardware. For example, module x can be a separate processing element or integrated into a chip within the device. Additionally, module x can be stored as program code in the device's memory, invoked and executed by a processing element. The implementation of other modules is similar. These modules can be fully or partially integrated together or implemented independently. The processing element mentioned here can be an integrated circuit with signal processing capabilities. In the implementation process, each step of the above method or each of the above modules can be completed through integrated logic circuits in the hardware of the processor element or through software instructions. These modules can be one or more integrated circuits configured to implement the above methods, such as one or more Application Specific Integrated Circuits (ASICs), one or more Digital Signal Processors (DSPs), one or more Field Programmable Gate Arrays (FPGAs), etc. When a module is implemented through processing element scheduler code, the processing element can be a general-purpose processor, such as a Central Processing Unit (CPU) or other processor capable of calling program code. These modules can be integrated together to implement a System-on-a-Chip (SOC).

[0087] The storage medium of this invention stores a computer program, which, when executed by a processor, implements the aforementioned satellite-to-ground network communication link selection method. Preferably, the storage medium includes various media capable of storing program code, such as ROM, RAM, magnetic disk, USB flash drive, memory card, or optical disk.

[0088] like Figure 4 As shown, in one embodiment, the satellite-to-ground network communication link selection terminal of the present invention includes a processor 41 and a memory 42.

[0089] The memory 42 is used to store computer programs. The memory 42 includes various media capable of storing program code, such as ROM, RAM, magnetic disk, USB flash drive, memory card, or optical disk.

[0090] The processor 41 is connected to the memory 42 and is used to execute the computer program stored in the memory so that the satellite-to-ground network communication link selection terminal performs the above-described satellite-to-ground network communication link selection method.

[0091] Preferably, the processor can be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it can also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components.

[0092] In summary, the satellite-to-ground network communication link selection method, system, storage medium, and terminal of this invention utilize the inherent coherence of signals from user terminal devices to construct high-dimensional statistical characteristics of transmitted signals, and select communication links in the satellite-to-ground network based on high-dimensional information interaction channels. This improves the utilization rate of communication link resources in the integrated space-ground network and enhances overall network performance. It has a wide range of applications and does not conflict with existing mainstream communication network link selection technologies, allowing for further cooperation. It is easy to implement, requiring no modification to the existing system's hardware structure, facilitating practical promotion and application. Therefore, this invention effectively overcomes the various shortcomings of existing technologies and possesses high industrial application value.

[0093] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A method for selecting communication links in a satellite-to-ground network, characterized in that: Includes the following steps: When at least two available satellite-to-ground links exist, high-dimensional statistical features of the transmitted signals on each satellite-to-ground link are extracted; the high-dimensional statistical features in r(n) represents the transmitted signal on the satellite-to-ground link, L represents the observation window length, τ represents the cyclic delay variable, M = number of subcarriers + cyclic prefix length, (·)* represents the conjugate operation, and N represents the total number of subcarriers; The corresponding satellite-to-ground link status information is obtained based on the aforementioned high-dimensional statistical features; Based on the status information of the satellite-to-ground link, the optimal link is selected from at least two available satellite-to-ground links; Signal transmission is performed based on the optimal link, and the state information of the transmitted signal is mapped onto the high-dimensional statistical features of the optimal link. It also includes constructing a high-dimensional information interaction channel, on which a high-dimensional statistical feature sequence lookup table is pre-stored. The high-dimensional statistical feature sequence lookup table realizes the mapping between the high-dimensional statistical features and the status information of the satellite-to-ground link. Based on the high-dimensional statistical features, the corresponding status information of the satellite-to-ground link is obtained from the high-dimensional information interaction channel.

2. The satellite-to-ground network communication link selection method according to claim 1, characterized in that: The status information of the satellite-to-ground link includes one or more combinations of data rate, access probability, latency, energy efficiency, and mobility requirements.

3. The satellite-to-ground network communication link selection method according to claim 1, characterized in that: Based on the status information of the satellite-to-ground link, the optimal link is selected from at least two available satellite-to-ground links using any of the following methods: 1) The optimal link is selected solely based on the status information of the satellite-to-ground link; 2) Select the optimal link by combining the status information of the satellite-to-ground link and the user transmission requirement information.

4. The satellite-to-ground network communication link selection method according to claim 3, characterized in that: The user transmission demand information includes one or more combinations of service requirements, mobility characteristics, and user preferences.

5. The satellite-to-ground network communication link selection method according to claim 1, characterized in that: The state information of the transmitted signal and the high-dimensional statistical features have a preset correspondence.

6. A satellite-to-ground network communication link selection system, characterized in that: It includes an extraction module, an acquisition module, a selection module, and a transmission module; The extraction module is used to extract high-dimensional statistical features of the transmitted signals on each satellite-to-ground link when at least two available satellite-to-ground links exist; the high-dimensional statistical features in r(n) represents the transmitted signal on the satellite-to-ground link, L represents the observation window length, τ represents the cyclic delay variable, M = number of subcarriers + cyclic prefix length, (·)* represents the conjugate operation, and N represents the total number of subcarriers; The acquisition module is used to acquire the status information of the corresponding satellite-to-ground link based on the high-dimensional statistical features; The selection module is used to select the best link from at least two available satellite-to-ground links based on the status information of the satellite-to-ground link. The transmission module is used to transmit signals based on the optimal link and to map the state information of the transmitted signal onto the high-dimensional statistical features of the optimal link. It also includes constructing a high-dimensional information interaction channel, on which a high-dimensional statistical feature sequence lookup table is pre-stored. The high-dimensional statistical feature sequence lookup table realizes the mapping between the high-dimensional statistical features and the status information of the satellite-to-ground link. Based on the high-dimensional statistical features, the corresponding status information of the satellite-to-ground link is obtained from the high-dimensional information interaction channel.

7. A storage medium having a computer program stored thereon, characterized in that, When the program is executed by the processor, it implements the satellite-to-ground network communication link selection method as described in any one of claims 1 to 5.

8. A satellite-to-ground network communication link selection terminal, characterized in that, include: Processor and memory; The memory is used to store computer programs; The processor is used to execute the computer program stored in the memory, so that the satellite-to-ground network communication link selection terminal performs the satellite-to-ground network communication link selection method according to any one of claims 1 to 5.

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