Data Transmission Method and Device for Space-Air-Ground Integrated Network

Abstract

The present invention provides a data transmission method and apparatus for an air-space-ground integrated network. The uplink data transmission requests and downlink data transmission requests are sorted according to the task priorities respectively to construct an uplink request sequence and a downlink request sequence. Then, based on the total transmission power of the HAPS, the channel capacity requirements of each uplink data transmission request in the uplink request sequence, and the channel capacity requirements of each downlink data transmission request in the downlink request sequence, the optimal values of A and B that maximize (A + B) / (Nul + Ndl) are determined. Subsequently, based on the optimal values of A and B, the optimal uplink data transmission power and the optimal downlink data transmission power provided by the HAPS are determined, and two-way data transmission is performed based on the optimal uplink data transmission power and the optimal downlink data transmission power, which improves the efficiency of two-way relay communication in the air-space-ground integrated network and maximally meets the transmission requirements of each two-way transmission request.

Description

Technical Field

[0001] The present invention relates to the technical field of data transmission, and particularly to a data transmission method and device for a space-air-ground integrated network. Background Art

[0002] A space-air-ground integrated network is a multi-dimensional collaborative network architecture that integrates satellites, aerial platforms (such as high-altitude platform stations, unmanned aerial vehicles), and terrestrial communication systems. By integrating communication nodes at different altitudes, it achieves full-domain coverage, seamless connection, and dynamic resource allocation, and is particularly suitable for scenarios that are difficult to cover by traditional terrestrial networks, such as remote areas, the ocean, and aviation. This network can support diverse requirements such as wide-area Internet of Things, emergency communication, and military applications, and constructs an efficient, flexible, and low-latency three-dimensional communication system through relay nodes such as high- and low-earth orbit satellites and high-altitude platform stations to complement terrestrial 5G / 6G networks.

[0003] A high-altitude platform station (HAPS) refers to a quasi-stationary communication platform deployed in the stratosphere (at an altitude of approximately 20 - 50 kilometers), usually carried by a solar-powered unmanned aerial vehicle, balloon, or airship. HAPS combines the characteristics of satellites and terrestrial base stations: compared with satellites, its deployment cost is low and the propagation delay is short; compared with terrestrial base stations, the coverage range is wider (with a diameter of approximately 100 - 500 kilometers). HAPS can be used as an aerial base station, relay node, or edge computing center, and is widely applied in rural networking, disaster emergency, military reconnaissance, and other fields, and is one of the core components of a space-air-ground integrated network.

[0004] However, in the current relay transmission system of a space-air-ground integrated network, the upper limits of the transmission powers of the uplink and downlink of HAPS are set to fixed values. Although this fixed power allocation mechanism is relatively simple in system design, it has obvious limitations in actual application scenarios. Especially when there is an imbalance in the uplink and downlink traffic in the network, this rigid allocation method will expose significant defects. The transmission power of some links may be largely idle due to low demand, while the power resources of other links may be stretched due to high demand. This irrationality in resource allocation not only reduces the overall energy utilization efficiency of the system, but may also lead to a decline in communication quality and network performance bottlenecks, thereby affecting the operation efficiency of the entire space-air-ground integrated network. Summary of the Invention

[0005] The present invention provides a data transmission method and device for a space-air-ground integrated network to solve the defect of poor overall energy utilization efficiency in the prior art.

[0006] The present invention provides a data transmission method for a space-air-ground integrated network, including:

[0007] Determine the uplink data transmission requests and downlink data transmission requests of the ground terminal, and sort the uplink data transmission requests and downlink data transmission requests respectively in descending order of task priority to obtain an uplink request sequence and a downlink request sequence;

[0008] Based on the total transmission power of the HAPS, the channel capacity requirements of each uplink data transmission request in the uplink request sequence, and the channel capacity requirements of each downlink data transmission request in the downlink request sequence, determine the optimal values of A and B that maximize (A + B) / (Nul + Ndl); where A represents the number of uplink data transmission requests that can be satisfied by the uplink data transmission power currently provided by the HAPS in the uplink request sequence, B represents the number of downlink data transmission requests that can be satisfied by the downlink data transmission power currently provided by the HAPS in the downlink request sequence; Nul is the total number of uplink data transmission requests, and Ndl is the total number of downlink data transmission requests;

[0009] Based on the optimal values of A and B, determine the optimal uplink data transmission power and optimal downlink data transmission power provided by the HAPS, and perform two-way data transmission based on the optimal uplink data transmission power and optimal downlink data transmission power provided by the HAPS.

[0010] According to a data transmission method for an air-ground-space integrated network provided by the present invention, the step of determining the optimal values of A and B that maximize (A + B) / (Nul + Ndl) based on the total transmission power of the HAPS, the channel capacity requirements of each uplink data transmission request in the uplink request sequence, and the channel capacity requirements of each downlink data transmission request in the downlink request sequence includes:

[0011] A value selection step: Select the current value of A from multiple first candidate values, and based on the current value of A, select the corresponding number of uplink data transmission requests with the highest priority from the uplink request sequence as the uplink requests to be satisfied;

[0012] Uplink and downlink transmission power determination step: Based on the channel capacity requirements of the uplink requests to be satisfied, determine the uplink data transmission power that the HAPS currently needs to provide, and based on the total transmission power of the HAPS and the uplink data transmission power that the HAPS currently needs to provide, determine the downlink data transmission power that the HAPS currently can provide;

[0013] B value determination step: Based on the downlink data transmission power that the HAPS currently can provide and the channel capacity requirements of each downlink data transmission request in the downlink request sequence, determine the current value of B;

[0014] First iteration step: Repeat the A value selection step, the uplink and downlink transmission power determination step, and the B value determination step until all the multiple first candidate values are traversed;

[0015] Based on different values of A and B, determine the optimal values of A and B that satisfy the maximum of (A + B) / (Nul + Ndl).

[0016] According to a data transmission method for a space-air-ground integrated network provided by the present invention, the determining the uplink data transmission power that the HAPS currently needs to provide based on the channel capacity requirement of the uplink request to be satisfied includes:

[0017] Based on the channel capacity requirement of the uplink request to be satisfied, determine the uplink channel capacity;

[0018] Based on the uplink channel capacity, the number of uplink requests to be satisfied, the uplink link bandwidth, and the signal-to-noise ratio of the signal from the ground terminal to the HAPS, determine the signal-to-noise ratio of the signal from the HAPS to the satellite;

[0019] Based on the signal-to-noise ratio of the signal from the HAPS to the satellite, determine the uplink data transmission power that the HAPS currently needs to provide.

[0020] According to a data transmission method for a space-air-ground integrated network provided by the present invention, the determining the signal-to-noise ratio of the signal from the HAPS to the satellite based on the uplink channel capacity, the number of uplink requests to be satisfied, the uplink link bandwidth, and the signal-to-noise ratio of the signal from the ground terminal to the HAPS includes:

[0021] Calculate the signal-to-noise ratio of the signal from the HAPS to the satellite based on the following formula:

[0022]

[0023] Wherein, is the signal-to-noise ratio of the signal from the HAPS to the satellite, Cul is the uplink channel capacity, N is the number of uplink requests to be satisfied, BWul is the uplink link bandwidth, is the signal-to-noise ratio of the signal from the ground terminal to the HAPS.

[0024] According to a data transmission method for a space-air-ground integrated network provided by the present invention, the determining the current value of B based on the downlink data transmission power that the HAPS can currently provide and the channel capacity requirements of each downlink data transmission request in the downlink request sequence includes:

[0025] B value selection step: Select the current candidate value of B from multiple second candidate values, and based on the current candidate value of B, select the corresponding number of downlink data transmission requests with the highest priority from the downlink request sequence as the downlink requests to be satisfied;

[0026] B value screening step: Based on the downlink data transmission power currently provided by HAPS, determine the signal-to-noise ratio of the signal from HAPS to the ground terminal, and based on the signal-to-noise ratio of the signal from HAPS to the ground terminal, the signal-to-noise ratio of the signal from the satellite to HAPS, the number of downlink requests to be satisfied, and the downlink bandwidth, determine the ideal channel capacity; if the ideal channel capacity is greater than the channel capacity requirement of the downlink requests to be satisfied, determine the current candidate value of B as the selectable value corresponding to B;

[0027] Second iteration step: Repeat the B value selection step and the B value screening step until all the multiple second candidate values are traversed; based on the selectable value corresponding to B, determine the current value of B.

[0028] According to a data transmission method for an air-space-ground integrated network provided by the present invention, the determining the ideal channel capacity based on the signal-to-noise ratio of the signal from HAPS to the ground terminal, the signal-to-noise ratio of the signal from the satellite to HAPS, the number of downlink requests to be satisfied, and the downlink bandwidth includes:

[0029] Calculate the ideal channel capacity based on the following formula:

[0030]

[0031] where Cdl is the ideal channel capacity, BWdl is the downlink bandwidth, N' is the number of downlink requests to be satisfied, is the signal-to-noise ratio of the signal from the satellite to HAPS, is the signal-to-noise ratio of the signal from HAPS to the ground terminal.

[0032] The present invention also provides a data transmission device for an air-space-ground integrated network, including:

[0033] Uplink and downlink request processing unit, configured to determine the uplink data transmission request and the downlink data transmission request of the ground terminal, and sort the uplink data transmission request and the downlink data transmission request respectively in descending order of task priority to obtain an uplink request sequence and a downlink request sequence;

[0034] A transmission power optimization unit, which is used to determine the optimal values of A and B that maximize (A + B) / (Nul + Ndl) based on the total transmission power of the HAPS, the channel capacity requirements of each uplink data transmission request in the uplink request sequence, and the channel capacity requirements of each downlink data transmission request in the downlink request sequence; where A represents the number of uplink data transmission requests that can be satisfied by the uplink data transmission power currently provided by the HAPS in the uplink request sequence, B represents the number of downlink data transmission requests that can be satisfied by the downlink data transmission power currently provided by the HAPS in the downlink request sequence; Nul is the total number of uplink data transmission requests, and Ndl is the total number of downlink data transmission requests;

[0035] A transmission unit, which is used to determine the optimal uplink data transmission power and the optimal downlink data transmission power provided by the HAPS based on the optimal values of A and B, and perform two-way data transmission based on the optimal uplink data transmission power and the optimal downlink data transmission power provided by the HAPS.

[0036] According to a data transmission device for an air-space-ground integrated network provided by the present invention, the determining the optimal values of A and B that maximize (A + B) / (Nul + Ndl) based on the total transmission power of the HAPS, the channel capacity requirements of each uplink data transmission request in the uplink request sequence, and the channel capacity requirements of each downlink data transmission request in the downlink request sequence includes:

[0037] An A value selection step: selecting the current value of A from multiple first candidate values, and selecting the corresponding number of uplink data transmission requests with the highest priority from the uplink request sequence based on the current value of A as the uplink requests to be satisfied;

[0038] An uplink and downlink transmission power determination step: determining the uplink data transmission power that the HAPS currently needs to provide based on the channel capacity requirements of the uplink requests to be satisfied, and determining the downlink data transmission power that the HAPS can currently provide based on the total transmission power of the HAPS and the uplink data transmission power that the HAPS currently needs to provide;

[0039] A B value determination step: determining the current value of B based on the downlink data transmission power that the HAPS can currently provide and the channel capacity requirements of each downlink data transmission request in the downlink request sequence;

[0040] A first iteration step: repeating the A value selection step, the uplink and downlink transmission power determination step, and the B value determination step until all the multiple first candidate values are traversed;

[0041] Based on different values of A and B, determining the optimal values of A and B that maximize (A + B) / (Nul + Ndl).

[0042] The present invention also provides an electronic device, including a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the program, it implements the data transmission method of the air-space-ground integrated network as described in any one of the above.

[0043] The present invention also provides a non-transitory computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, it implements the data transmission method of the air-space-ground integrated network as described in any one of the above.

[0044] The present invention also provides a computer program product, including a computer program. When the computer program is executed by a processor, it implements the data transmission method of the air-space-ground integrated network as described in any one of the above.

[0045] The data transmission method and device of the air-space-ground integrated network provided by the present invention sort the uplink data transmission requests and downlink data transmission requests respectively in the order of decreasing task priority to construct an uplink request sequence and a downlink request sequence. Then, based on the total transmission power of the HAPS, the channel capacity requirements of each uplink data transmission request in the uplink request sequence, and the channel capacity requirements of each downlink data transmission request in the downlink request sequence, the optimal values of A and B that maximize (A + B) / (Nul + Ndl) are determined. Here, A represents the number of uplink data transmission requests that can be satisfied by the uplink data transmission power currently provided by the HAPS in the uplink request sequence, B represents the number of downlink data transmission requests that can be satisfied by the downlink data transmission power currently provided by the HAPS in the downlink request sequence, Nul is the total number of uplink data transmission requests, and Ndl is the total number of downlink data transmission requests. Subsequently, based on the optimal values of A and B, the optimal uplink data transmission power and the optimal downlink data transmission power provided by the HAPS are determined, and two-way data transmission is performed based on the optimal uplink data transmission power and the optimal downlink data transmission power provided by the HAPS. It can control the transmission power allocated by the HAPS to the two-way link according to the real-time changing communication requirements, improve the efficiency of two-way relay communication in the air-space-ground integrated network, and simultaneously maximize the satisfaction of the transmission requirements of each two-way transmission request. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0047] Figure 1It is a schematic flowchart of the data transmission method for the space-air-ground integrated network provided by the present invention;

[0048] Figure 2 It is a schematic flowchart of the demand allocation optimization algorithm provided by the present invention;

[0049] Figure 3 It is a schematic structural diagram of the data transmission device for the space-air-ground integrated network provided by the present invention;

[0050] Figure 4 It is a schematic structural diagram of the electronic device provided by the present invention. Detailed implementation manners

[0051] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions in the present invention will be clearly and completely described below with reference to the accompanying drawings in the present invention. Apparently, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art without making creative efforts based on the embodiments in the present invention belong to the scope of protection of the present invention.

[0052] Figure 1 It is a schematic flowchart of the data transmission method for the space-air-ground integrated network provided by the present invention. As Figure 1 shown, the method includes:

[0053] Step 110: Determine the uplink data transmission request and the downlink data transmission request of the ground terminal, and sort the uplink data transmission request and the downlink data transmission request respectively in the order from the highest to the lowest task priority to obtain an uplink request sequence and a downlink request sequence;

[0054] Step 120: Based on the total transmission power of the HAPS, the channel capacity requirements of each uplink data transmission request in the uplink request sequence, and the channel capacity requirements of each downlink data transmission request in the downlink request sequence, determine the optimal values of A and B that maximize (A + B) / (Nul + Ndl);

[0055] where A represents the number of uplink data transmission requests that can be satisfied by the uplink data transmission power currently provided by the HAPS in the uplink request sequence, B represents the number of downlink data transmission requests that can be satisfied by the downlink data transmission power currently provided by the HAPS in the downlink request sequence; Nul is the total number of uplink data transmission requests, and Ndl is the total number of downlink data transmission requests;

[0056] Step 130: Based on the optimal values of A and B, determine the optimal uplink data transmission power and the optimal downlink data transmission power provided by the HAPS, and perform two-way data transmission based on the optimal uplink data transmission power and the optimal downlink data transmission power provided by the HAPS.

[0057] Here, the integrated space-air-ground network includes satellites, HAPS, and ground terminals. There is no direct communication between satellites and ground terminals. Instead, communication is carried out via HAPS. Among them, the satellite refers to the satellite closest to HAPS. There are multiple ground terminals. At a certain point in time, some ground terminals are responsible for uplink data transmission (i.e., the signal transmission direction is ground terminal - HAPS - satellite), and some ground terminals are responsible for downlink data transmission (i.e., the signal transmission direction is satellite - HAPS - ground terminal). The same ground terminal is only responsible for uplink data transmission or downlink data transmission at the same point in time. It should be noted that in the integrated space-air-ground network, both the uplink and downlink use the Ka-band. For the link between the satellite and HAPS, its available frequency band is equally divided into multiple sub-channels, and these sub-channels will subsequently be allocated to the link between HAPS and the ground terminal, and based on the multi-frequency time-division multiple access technology, it is ensured that the spectra between different links do not overlap.

[0058] For each current ground terminal, the uplink data transmission requests and downlink data transmission requests responsible for each ground terminal can be determined. Subsequently, the uplink data transmission requests are sorted in descending order of task priority to obtain an uplink request sequence, and at the same time, the downlink data transmission requests are sorted in descending order of task priority to obtain a downlink request sequence. Among them, in order to ensure that high-priority tasks can be responded to in a timely manner, after receiving the uplink data transmission requests and downlink data transmission requests of multiple ground terminals, HAPS records their task attributes, including the request initiation time, service type (such as voice, video, file transfer), data volume requirement, and delay sensitivity, etc. According to the task attributes, the uplink / downlink data transmission requests are prioritized.

[0059] Since the total transmission power of HAPS is limited, and the data transmission requirements of the uplink and downlink change in real time, it is necessary to reasonably allocate power to maximize the satisfaction of the data transmission requirements of each ground terminal. Specifically, based on the total transmission power of HAPS, the channel capacity requirements of each uplink data transmission request in the uplink request sequence, and the channel capacity requirements of each downlink data transmission request in the downlink request sequence, the optimal values of A and B that maximize (A + B) / (Nul + Ndl) can be determined, so that the limited power resources can cover more ground terminals to the greatest extent. Among them, A represents the number of uplink data transmission requests that can be satisfied by the uplink data transmission power currently provided by HAPS in the uplink request sequence, B represents the number of downlink data transmission requests that can be satisfied by the downlink data transmission power currently provided by HAPS in the downlink request sequence, Nul is the total number of uplink data transmission requests, and Ndl is the total number of downlink data transmission requests. In the specific calculation process, the channel capacity requirements of each uplink data transmission request and downlink data transmission request can be estimated based on the channel state information first, and then the demand allocation optimization algorithm considering the total transmission power limit of HAPS can be used to solve the optimal A and B to maximize (A + B) / (Nul + Ndl), so that the optimal uplink data transmission power and optimal downlink data transmission power that can satisfy A uplink data transmission requests and B downlink data transmission requests can be calculated based on the optimal values of A and B.

[0060] In some alternative embodiments, since existing optimization algorithms, such as convex optimization methods or Lagrange multiplier methods, have high computational complexity and the computational efficiency is difficult to meet the real-time requirements of data transmission, a fast and effective demand allocation optimization algorithm is provided to determine the optimal values of A and B that maximize (A + B) / (Nul + Ndl) based on the total transmission power of HAPS, the channel capacity requirements of each uplink data transmission request in the uplink request sequence, and the channel capacity requirements of each downlink data transmission request in the downlink request sequence. As Figure 2 shown, the demand allocation optimization algorithm provided by the embodiments of the present invention includes:

[0061] A value selection step 210: Select the current value of A from multiple first candidate values, and select the corresponding number of the highest-priority uplink data transmission requests from the uplink request sequence based on the current value of A as the uplink requests to be satisfied;

[0062] Uplink and downlink transmission power determination step 220: Determine the uplink data transmission power that HAPS currently needs to provide based on the channel capacity requirements of the uplink requests to be satisfied, and determine the downlink data transmission power that HAPS currently can provide based on the total transmission power of HAPS and the uplink data transmission power that HAPS currently needs to provide;

[0063] B - value determination step 230: Determine the current value of B based on the downlink data transmission power currently provided by the HAPS and the channel capacity requirements of each downlink data transmission request in the downlink request sequence.

[0064] First iteration step 240: Repeat the A - value selection step, the uplink - downlink transmission power determination step, and the B - value determination step until all the multiple first candidate values are traversed.

[0065] Step 250: Based on different values of A and B, determine the optimal values of A and B that maximize (A + B) / (Nul + Ndl).

[0066] Specifically, based on the task attributes of each uplink data transmission request in the uplink request sequence, determine the number of requests that need to be transmitted in a timely manner, and use this number of requests that need to be transmitted in a timely manner as the minimum value to determine multiple first candidate values. That is, the first candidate value is greater than or equal to the number of requests that need to be transmitted in a timely manner.

[0067] In the A - value selection step, select an untraversed value from the multiple first candidate values as the current value of A, and based on the current value of A, select the corresponding number (i.e., the current value of A) of the highest - priority uplink data transmission requests from the uplink request sequence as the uplink requests to be satisfied.

[0068] In the uplink - downlink transmission power determination step, the uplink data transmission power that the HAPS currently needs to provide can be determined based on the channel capacity requirements of the uplink requests to be satisfied. In some embodiments, the uplink channel capacity can be determined based on the channel capacity requirements of the uplink requests to be satisfied. For example, the maximum value of the channel capacity requirements of each uplink request to be satisfied is used as the uplink channel capacity. Subsequently, based on the uplink channel capacity, the number of uplink requests to be satisfied, the uplink link bandwidth, and the signal - to - noise ratio of the signal from the ground terminal to the HAPS, determine the signal - to - noise ratio of the signal from the HAPS to the satellite, and then based on the signal - to - noise ratio of the signal from the HAPS to the satellite, determine the uplink data transmission power that the HAPS currently needs to provide.

[0069] In some other embodiments, the signal - to - noise ratio of the signal from the HAPS to the satellite can be calculated based on the following formula:

[0070]

[0071] where, is the signal - to - noise ratio of the signal from the HAPS to the satellite, Cul is the uplink channel capacity, N is the number of uplink requests to be satisfied, BWul is the uplink link bandwidth, is the signal - to - noise ratio of the signal from the ground terminal to the HAPS.

[0072] The uplink data transmission power that the HAPS currently needs to provide can be calculated based on the following formula:

[0073]

[0074] Where P H2S is the uplink data transmission power that the HAPS currently needs to provide; g S is the channel gain between the satellite and the HAPS; is the power spectral density of the additive white Gaussian noise of the satellite.

[0075] After determining the uplink data transmission power that the HAPS currently needs to provide, based on the total transmission power of the HAPS, the uplink data transmission power that the HAPS currently needs to provide, and the current value of A, the downlink data transmission power that the HAPS can currently provide can be determined.

[0076] In the B value determination step, since the downlink data transmission power that the HAPS can currently provide under the current value of A is determined, the current value of B can be determined based on the downlink data transmission power that the HAPS can currently provide and the channel capacity requirements of each downlink data transmission request in the downlink request sequence. That is, based on the channel capacity requirements of each downlink data transmission request, determine the number of downlink data transmission requests that the downlink data transmission power that the HAPS can currently provide can satisfy. In some embodiments, the following B value determination algorithm can be executed to determine the current value of B:

[0077] B value selection step: Select the current candidate value of B from multiple second candidate values, and based on the current candidate value of B, select the corresponding number of downlink data transmission requests with the highest priority from the downlink request sequence as the downlink requests to be satisfied;

[0078] B value screening step: Based on the downlink data transmission power that the HAPS can currently provide, determine the signal-to-noise ratio of the signal from the HAPS to the ground terminal, and based on the signal-to-noise ratio of the signal from the HAPS to the ground terminal, the signal-to-noise ratio of the signal from the satellite to the HAPS, the number of the downlink requests to be satisfied, and the downlink link bandwidth, determine the ideal channel capacity; if the ideal channel capacity is greater than the channel capacity requirements of the downlink requests to be satisfied, determine the current candidate value of B as the selectable value corresponding to B;

[0079] Second iteration step: Repeat the B value selection step and the B value screening step until all the multiple second candidate values are traversed; based on the selectable value corresponding to B, determine the current value of B.

[0080] Among them, based on the task attributes of each downlink data transmission request in the downlink request sequence, the number of requests that need to be transmitted in a timely manner can be determined, and using the number of requests that need to be transmitted in a timely manner as the minimum value, multiple second candidate values can be determined. In the B-value selection step, the current candidate value of B can be selected from the multiple second candidate values, and based on the current candidate value of B, the corresponding number (i.e., the current candidate value of B) of the downlink data transmission requests with the highest priority can be selected from the downlink request sequence as the downlink requests to be satisfied. Subsequently, in the B-value screening step, based on the downlink data transmission power that the HAPS can currently provide, the signal-to-noise ratio of the signal from the HAPS to the ground terminal can be determined, and based on the signal-to-noise ratio of the signal from the HAPS to the ground terminal, the signal-to-noise ratio of the signal from the satellite to the HAPS, the number of downlink requests to be satisfied, and the downlink link bandwidth, the ideal channel capacity can be determined.

[0081] In some embodiments, the signal-to-noise ratio of the signal from the HAPS to the ground terminal can be calculated based on the following formula:

[0082]

[0083] Among them, SNR H2G is the signal-to-noise ratio of the signal from the HAPS to the ground terminal, P H2G is the downlink data transmission power that the HAPS can currently provide, N' is the number of downlink requests to be satisfied, gG is the channel gain between the HAPS and the ground terminal responsible for the downlink data transmission request, is the additive white Gaussian noise power spectral density of the ground terminal responsible for the downlink data transmission request.

[0084] The ideal channel capacity can be calculated based on the following formula:

[0085]

[0086] Among them, Cdl is the ideal channel capacity, BWdl is the downlink link bandwidth, N' is the number of downlink requests to be satisfied, is the signal-to-noise ratio of the signal from the satellite to the HAPS, is the signal-to-noise ratio of the signal from the HAPS to the ground terminal.

[0087] If the ideal channel capacity is greater than the channel capacity requirement of the downlink requests to be satisfied (if the channel capacity requirements of multiple downlink requests to be satisfied are different, take the maximum value), then determine the current candidate value of B as the selectable value corresponding to B, otherwise ignore the current candidate value of B.

[0088] The second iteration step repeats the B-value selection step and the B-value screening step until all the multiple second candidate values are traversed. Then, the current value of B can be determined based on the selectable values corresponding to B. It should be noted that if there are multiple selectable values corresponding to B, the maximum selectable value is determined as the current value of B; if the selectable values corresponding to B are empty, the current value of B is also determined to be empty.

[0089] Returning to the demand allocation optimization algorithm, the first iteration step repeats the A-value selection step, the uplink and downlink transmission power determination step, and the B-value determination step until all the multiple first candidate values are traversed, obtaining the values of multiple pairs of (A, B) combinations. Based on the values of multiple pairs of (A, B) combinations, the optimal values of A and B that can satisfy the maximum of (A + B) / (Nul + Ndl) can be determined.

[0090] After determining the optimal values of A and B, the optimal uplink data transmission power and the optimal downlink data transmission power provided by the HAPS can be determined, and two-way data transmission is performed based on the optimal uplink data transmission power and the optimal downlink data transmission power provided by the HAPS. Among them, based on the optimal value of A, the optimal uplink data transmission power provided by the HAPS can be calculated in the manner given in the above embodiments, and based on the total transmission power of the HAPS, the optimal uplink data transmission power provided by the HAPS, and the optimal values of A and B, the optimal downlink data transmission power provided by the HAPS is determined.

[0091] In summary, the method provided by the embodiments of the present invention sorts the uplink data transmission requests and the downlink data transmission requests in descending order of task priority, constructs an uplink request sequence and a downlink request sequence, and thus determines the optimal values of A and B that satisfy the maximum of (A + B) / (Nul + Ndl) based on the total transmission power of the HAPS, the channel capacity requirements of each uplink data transmission request in the uplink request sequence, and the channel capacity requirements of each downlink data transmission request in the downlink request sequence; where A represents the number of uplink data transmission requests that the uplink data transmission power currently provided by the HAPS in the uplink request sequence can satisfy, B represents the number of downlink data transmission requests that the downlink data transmission power currently provided by the HAPS in the downlink request sequence can satisfy, Nul is the total number of uplink data transmission requests, and Ndl is the total number of downlink data transmission requests; then, based on the optimal values of A and B, the optimal uplink data transmission power and the optimal downlink data transmission power provided by the HAPS are determined, and two-way data transmission is performed based on the optimal uplink data transmission power and the optimal downlink data transmission power provided by the HAPS, which can control the transmission power allocated by the HAPS to the two-way link according to the real-time changing communication requirements, improve the efficiency of two-way relay communication in the air-ground-space integrated network, and at the same time maximize the transmission requirements of each two-way transmission request.

[0092] The data transmission device of the air-space-ground integrated network provided by the present invention will be described below. The data transmission device of the air-space-ground integrated network described below can be correspondingly referred to the data transmission method of the air-space-ground integrated network described above.

[0093] Based on any of the above embodiments, Figure 3 is a schematic structural diagram of the data transmission device of the air-space-ground integrated network provided by the present invention. As Figure 3 shown, the device includes:

[0094] An uplink and downlink request processing unit 310, configured to determine the uplink data transmission request and the downlink data transmission request of the ground terminal, and sort the uplink data transmission request and the downlink data transmission request respectively in the order of decreasing task priority to obtain an uplink request sequence and a downlink request sequence;

[0095] A transmission power optimization unit 320, configured to determine the optimal values of A and B that satisfy the maximum of (A + B) / (Nul + Ndl) based on the total transmission power of the HAPS, the channel capacity requirements of each uplink data transmission request in the uplink request sequence, and the channel capacity requirements of each downlink data transmission request in the downlink request sequence; where A represents the number of uplink data transmission requests that can be satisfied by the uplink data transmission power currently provided by the HAPS in the uplink request sequence, B represents the number of downlink data transmission requests that can be satisfied by the downlink data transmission power currently provided by the HAPS in the downlink request sequence; Nul is the total number of uplink data transmission requests, and Ndl is the total number of downlink data transmission requests;

[0096] A transmission unit 330, configured to determine the optimal uplink data transmission power and the optimal downlink data transmission power provided by the HAPS based on the optimal values of A and B, and perform two-way data transmission based on the optimal uplink data transmission power and the optimal downlink data transmission power provided by the HAPS.

[0097] The device provided by the embodiment of the present invention sorts the uplink data transmission requests and the downlink data transmission requests in descending order of task priority respectively to construct an uplink request sequence and a downlink request sequence, and then determines the optimal values of A and B that maximize (A + B) / (Nul + Ndl) based on the total transmission power of the HAPS, the channel capacity requirements of each uplink data transmission request in the uplink request sequence, and the channel capacity requirements of each downlink data transmission request in the downlink request sequence; where A represents the number of uplink data transmission requests that can be satisfied by the uplink data transmission power currently provided by the HAPS in the uplink request sequence, and B represents the number of downlink data transmission requests that can be satisfied by the downlink data transmission power currently provided by the HAPS in the downlink request sequence; then based on the optimal values of A and B, the optimal uplink data transmission power and the optimal downlink data transmission power provided by the HAPS are determined, and two-way data transmission is performed based on the optimal uplink data transmission power and the optimal downlink data transmission power provided by the HAPS, which can control the transmission power allocated by the HAPS to the two-way link according to the real-time changing communication requirements, improve the efficiency of two-way relay communication in the air-ground-space integrated network, and at the same time maximize the transmission requirements of each two-way transmission request.

[0098] Based on any of the above embodiments, the determining the optimal values of A and B that maximize (A + B) / (Nul + Ndl) based on the total transmission power of the HAPS, the channel capacity requirements of each uplink data transmission request in the uplink request sequence, and the channel capacity requirements of each downlink data transmission request in the downlink request sequence includes:

[0099] A value selection step: Select the current value of A from multiple first candidate values, and based on the current value of A, select the corresponding number of uplink data transmission requests with the highest priority from the uplink request sequence as the uplink requests to be satisfied;

[0100] Uplink and downlink transmission power determination step: Based on the channel capacity requirements of the uplink requests to be satisfied, determine the uplink data transmission power that the HAPS currently needs to provide, and based on the total transmission power of the HAPS and the uplink data transmission power that the HAPS currently needs to provide, determine the downlink data transmission power that the HAPS currently can provide;

[0101] B value determination step: Based on the downlink data transmission power that the HAPS currently can provide and the channel capacity requirements of each downlink data transmission request in the downlink request sequence, determine the current value of B;

[0102] First iteration step: Repeat the A value selection step, the uplink and downlink transmission power determination step, and the B value determination step until all the multiple first candidate values are traversed;

[0103] Based on different values of A and B, determine the optimal values of A and B that satisfy the maximum of (A + B) / (Nul + Ndl).

[0104] Based on any of the above embodiments, determining the uplink data transmission power that the HAPS currently needs to provide based on the channel capacity requirement of the uplink request to be satisfied includes:

[0105] Determine the uplink channel capacity based on the channel capacity requirement of the uplink request to be satisfied;

[0106] Based on the uplink channel capacity, the number of uplink requests to be satisfied, the uplink link bandwidth, and the signal-to-noise ratio of the signal from the ground terminal to the HAPS, determine the signal-to-noise ratio of the signal from the HAPS to the satellite;

[0107] Based on the signal-to-noise ratio of the signal from the HAPS to the satellite, determine the uplink data transmission power that the HAPS currently needs to provide.

[0108] Based on any of the above embodiments, determining the signal-to-noise ratio of the signal from the HAPS to the satellite based on the uplink channel capacity, the number of uplink requests to be satisfied, the uplink link bandwidth, and the signal-to-noise ratio of the signal from the ground terminal to the HAPS includes:

[0109] Calculate the signal-to-noise ratio of the signal from the HAPS to the satellite based on the following formula:

[0110]

[0111] where, is the signal-to-noise ratio of the signal from the HAPS to the satellite, Cul is the uplink channel capacity, N is the number of uplink requests to be satisfied, BWul is the uplink link bandwidth, is the signal-to-noise ratio of the signal from the ground terminal to the HAPS.

[0112] Based on any of the above embodiments, determining the current value of B based on the downlink data transmission power that the HAPS can currently provide and the channel capacity requirements of each downlink data transmission request in the downlink request sequence includes:

[0113] B value selection step: Select the current candidate value of B from multiple second candidate values, and based on the current candidate value of B, select the corresponding number of downlink data transmission requests with the highest priority from the downlink request sequence as the downlink requests to be satisfied;

[0114] B value screening step: Based on the current downlink data transmission power that HAPS can provide, determine the signal-to-noise ratio of the signal from HAPS to the ground terminal, and based on the signal-to-noise ratio of the signal from HAPS to the ground terminal, the signal-to-noise ratio of the signal from the satellite to HAPS, the number of downlink requests to be satisfied, and the downlink bandwidth, determine the ideal channel capacity; if the ideal channel capacity is greater than the channel capacity requirement of the downlink requests to be satisfied, determine the current candidate value of B as the selectable value corresponding to B;

[0115] Second iteration step: Repeat the B value selection step and the B value screening step until all the multiple second candidate values are traversed; based on the selectable value corresponding to B, determine the current value of B.

[0116] Based on any of the above embodiments, the determining the ideal channel capacity based on the signal-to-noise ratio of the signal from HAPS to the ground terminal, the signal-to-noise ratio of the signal from the satellite to HAPS, the number of downlink requests to be satisfied, and the downlink bandwidth includes:

[0117] Calculate the ideal channel capacity based on the following formula:

[0118]

[0119] where Cdl is the ideal channel capacity, BWdl is the downlink bandwidth, N' is the number of downlink requests to be satisfied, is the signal-to-noise ratio of the signal from the satellite to HAPS, is the signal-to-noise ratio of the signal from HAPS to the ground terminal.

[0120] Figure 4 is a schematic structural diagram of the electronic device provided by the present invention, as Figure 4As shown in the figure, the electronic device may include: a processor 410, a memory 420, a communications interface 430, and a communication bus 440. Among them, the processor 410, the memory 420, and the communication interface 430 complete communication with each other through the communication bus 440. The processor 410 may call the logical instructions in the memory 420 to execute the data transmission method for the space-air-ground integrated network. The method includes: determining the uplink data transmission request and the downlink data transmission request of the ground terminal, and respectively sorting the uplink data transmission request and the downlink data transmission request in descending order of task priority to obtain an uplink request sequence and a downlink request sequence; based on the total transmission power of the HAPS, the channel capacity requirements of each uplink data transmission request in the uplink request sequence, and the channel capacity requirements of each downlink data transmission request in the downlink request sequence, determining the optimal values of A and B that satisfy the maximum of (A + B) / (Nul + Ndl); where A represents the number of uplink data transmission requests that can be satisfied by the uplink data transmission power currently provided by the HAPS in the uplink request sequence, and B represents the number of downlink data transmission requests that can be satisfied by the downlink data transmission power currently provided by the HAPS in the downlink request sequence; Nul is the total number of uplink data transmission requests, and Ndl is the total number of downlink data transmission requests; based on the optimal values of A and B, determining the optimal uplink data transmission power and the optimal downlink data transmission power provided by the HAPS, and performing two-way data transmission based on the optimal uplink data transmission power and the optimal downlink data transmission power provided by the HAPS.

[0121] In addition, when the logical instructions in the above-mentioned memory 420 are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or a part of this technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in various embodiments of the present invention. The foregoing storage medium includes: various media such as USB flash drives, mobile hard disks, read-only memories (ROMs), random access memories (RAMs), magnetic disks, or optical discs that can store program codes.

[0122] On the other hand, the present invention also provides a computer program product, which includes a computer program stored on a non-transitory computer-readable storage medium. The computer program includes program instructions. When the program instructions are executed by a computer, the computer can execute the data transmission method of the air-ground-space integrated network provided by the above-mentioned various methods. The method includes: determining the uplink data transmission request and the downlink data transmission request of the ground terminal, and respectively sorting the uplink data transmission request and the downlink data transmission request in the order of decreasing task priority to obtain an uplink request sequence and a downlink request sequence; based on the total transmission power of the HAPS, the channel capacity requirements of each uplink data transmission request in the uplink request sequence, and the channel capacity requirements of each downlink data transmission request in the downlink request sequence, determining the optimal values of A and B that satisfy the maximum of (A + B) / (Nul + Ndl); where A represents the number of uplink data transmission requests that can be satisfied by the uplink data transmission power currently provided by the HAPS in the uplink request sequence, and B represents the number of downlink data transmission requests that can be satisfied by the downlink data transmission power currently provided by the HAPS in the downlink request sequence; Nul is the total number of uplink data transmission requests, and Ndl is the total number of downlink data transmission requests; based on the optimal values of A and B, determining the optimal uplink data transmission power and the optimal downlink data transmission power provided by the HAPS, and performing two-way data transmission based on the optimal uplink data transmission power and the optimal downlink data transmission power provided by the HAPS.

[0123] In another aspect, the present invention also provides a non-transitory computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, it is implemented to execute the data transmission method of the air-ground-space integrated network provided by the above-mentioned various methods. The method includes: determining the uplink data transmission request and the downlink data transmission request of the ground terminal, and respectively sorting the uplink data transmission request and the downlink data transmission request in the order of decreasing task priority to obtain an uplink request sequence and a downlink request sequence; based on the total transmission power of the HAPS, the channel capacity requirements of each uplink data transmission request in the uplink request sequence, and the channel capacity requirements of each downlink data transmission request in the downlink request sequence, determining the optimal values of A and B that satisfy the maximum of (A + B) / (Nul + Ndl); where A represents the number of uplink data transmission requests that can be satisfied by the uplink data transmission power currently provided by the HAPS in the uplink request sequence, and B represents the number of downlink data transmission requests that can be satisfied by the downlink data transmission power currently provided by the HAPS in the downlink request sequence; Nul is the total number of uplink data transmission requests, and Ndl is the total number of downlink data transmission requests; based on the optimal values of A and B, determining the optimal uplink data transmission power and the optimal downlink data transmission power provided by the HAPS, and performing two-way data transmission based on the optimal uplink data transmission power and the optimal downlink data transmission power provided by the HAPS.

[0124] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed to multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art can understand and implement it without creative efforts.

[0125] Through the description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus a necessary general hardware platform, and of course, it can also be implemented by hardware. Based on such an understanding, the essence of the above technical solution, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0126] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some 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 invention.

Claims

1. A data transmission method for an integrated space-air-ground network, characterized in that Including: Determine the uplink data transmission requests and downlink data transmission requests of the ground terminal, and sort the uplink data transmission requests and downlink data transmission requests respectively in the order of decreasing task priority to obtain an uplink request sequence and a downlink request sequence; Based on the total transmission power of the HAPS, the channel capacity requirements of each uplink data transmission request in the uplink request sequence, and the channel capacity requirements of each downlink data transmission request in the downlink request sequence, determine the optimal values of A and B that maximize (A + B) / (Nul + Ndl); where A represents the number of uplink data transmission requests that can be satisfied by the uplink data transmission power currently provided by the HAPS in the uplink request sequence, and B represents the number of downlink data transmission requests that can be satisfied by the downlink data transmission power currently provided by the HAPS in the downlink request sequence; Nul is the total number of uplink data transmission requests, and Ndl is the total number of downlink data transmission requests; Based on the optimal values of A and B, determine the optimal uplink data transmission power and optimal downlink data transmission power provided by the HAPS, and perform two-way data transmission based on the optimal uplink data transmission power and optimal downlink data transmission power provided by the HAPS.

2. The data transmission method of the space-air-ground integrated network according to claim 1, wherein The determining the optimal values of A and B that maximize (A + B) / (Nul + Ndl) based on the total transmission power of the HAPS, the channel capacity requirements of each uplink data transmission request in the uplink request sequence, and the channel capacity requirements of each downlink data transmission request in the downlink request sequence includes: A value selection step: Select the current value of A from multiple first candidate values, and based on the current value of A, select the corresponding number of uplink data transmission requests with the highest priority from the uplink request sequence as the uplink requests to be satisfied; Uplink and downlink transmission power determination step: Based on the channel capacity requirements of the uplink requests to be satisfied, determine the uplink data transmission power that the HAPS currently needs to provide, and based on the total transmission power of the HAPS and the uplink data transmission power that the HAPS currently needs to provide, determine the downlink data transmission power that the HAPS can currently provide; B value determination step: Based on the downlink data transmission power that the HAPS can currently provide and the channel capacity requirements of each downlink data transmission request in the downlink request sequence, determine the current value of B; First iteration step: Repeat the A value selection step, the uplink and downlink transmission power determination step, and the B value determination step until all the multiple first candidate values are traversed; Based on different values of A and B, determine the optimal values of A and B that maximize (A + B) / (Nul + Ndl).

3. The data transmission method of the space-air-ground integrated network according to claim 2, characterized in that, The determining the uplink data transmission power that the HAPS currently needs to provide based on the channel capacity requirements of the uplink requests to be satisfied includes: Based on the channel capacity requirements of the uplink requests to be satisfied, determine the uplink channel capacity; Based on the uplink channel capacity, the number of uplink requests to be satisfied, the uplink link bandwidth, and the signal-to-noise ratio of the signal from the ground terminal to the HAPS, determine the signal-to-noise ratio of the signal from the HAPS to the satellite; Determine the uplink data transmission power that the HAPS currently needs to provide based on the signal-to-noise ratio of the HAPS-to-satellite signal.

4. The data transmission method of the space-air-ground integrated network according to claim 3, wherein The determining of the signal-to-noise ratio of the HAPS-to-satellite signal based on the uplink channel capacity, the number of uplink requests to be satisfied, the uplink bandwidth, and the signal-to-noise ratio of the ground terminal-to-HAPS signal includes: Calculate the signal-to-noise ratio of the HAPS-to-satellite signal based on the following formula: wherein, is the signal-to-noise ratio of the signal from the HAPS to the satellite, Cul is the uplink channel capacity, N is the number of uplink requests to be satisfied, BWul is the uplink bandwidth, is the signal-to-noise ratio of the signal from the ground terminal to the HAPS.

5. The data transmission method of the space-air-ground integrated network according to claim 2, wherein The determining of the current value of B based on the downlink data transmission power that the HAPS can currently provide and the channel capacity requirements of each downlink data transmission request in the downlink request sequence includes: B value selection step: Select the current candidate value of B from multiple second candidate values, and based on the current candidate value of B, select the corresponding number of downlink data transmission requests with the highest priority from the downlink request sequence as the downlink requests to be satisfied; B value screening step: Determine the signal-to-noise ratio of the HAPS-to-ground terminal based on the downlink data transmission power that the HAPS can currently provide, and determine the ideal channel capacity based on the signal-to-noise ratio of the HAPS-to-ground terminal, the signal-to-noise ratio of the satellite-to-HAPS signal, the number of downlink requests to be satisfied, and the downlink bandwidth; if the ideal channel capacity is greater than the channel capacity requirements of the downlink requests to be satisfied, determine the current candidate value of B as the selectable value corresponding to B; Second iteration step: Repeat the B value selection step and the B value screening step until all the multiple second candidate values are traversed; determine the current value of B based on the selectable value corresponding to B.

6. The data transmission method of the space-air-ground integrated network according to claim 5, wherein The determining of the ideal channel capacity based on the signal-to-noise ratio of the HAPS-to-ground terminal, the signal-to-noise ratio of the satellite-to-HAPS signal, the number of downlink requests to be satisfied, and the downlink bandwidth includes: Calculate the ideal channel capacity based on the following formula: wherein, Cdl is the ideal channel capacity, BWdl is the downlink bandwidth, N' is the number of downlink requests to be satisfied, is the signal-to-noise ratio of the signal from the satellite to the HAPS, is the signal-to-noise ratio of the signal from the HAPS to the ground terminal.

7. A data transmission device for an integrated space-air-ground network, characterized in that, Includes: Uplink and downlink request processing unit, configured to determine the uplink data transmission requests and downlink data transmission requests of the ground terminal, and sort the uplink data transmission requests and downlink data transmission requests respectively in descending order of task priority to obtain an uplink request sequence and a downlink request sequence; Transmission power optimization unit, configured to determine the optimal values of A and B that maximize (A + B) / (Nul + Ndl) based on the total transmission power of the HAPS, the channel capacity requirements of each uplink data transmission request in the uplink request sequence, and the channel capacity requirements of each downlink data transmission request in the downlink request sequence; where A represents the number of uplink data transmission requests that the uplink data transmission power currently provided by the HAPS in the uplink request sequence can satisfy, B represents the number of downlink data transmission requests that the downlink data transmission power currently provided by the HAPS in the downlink request sequence can satisfy; Nul is the total number of uplink data transmission requests, and Ndl is the total number of downlink data transmission requests; A transmission unit, configured to determine the optimal uplink data transmission power and the optimal downlink data transmission power provided by the HAPS based on the optimal values of A and B, and perform two-way data transmission based on the optimal uplink data transmission power and the optimal downlink data transmission power provided by the HAPS.

8. The data transmission device of the space-air-ground integrated network according to claim 7, characterized in that, Determining the optimal values of A and B that satisfy the maximum of (A + B) / (Nul + Ndl) based on the total transmission power of the HAPS, the channel capacity requirements of each uplink data transmission request in the uplink request sequence, and the channel capacity requirements of each downlink data transmission request in the downlink request sequence, includes: A value selection step: Select the current value of A from multiple first candidate values, and based on the current value of A, select the corresponding number of uplink data transmission requests with the highest priority from the uplink request sequence as the uplink requests to be satisfied; Uplink and downlink transmission power determination step: Based on the channel capacity requirements of the uplink requests to be satisfied, determine the uplink data transmission power that the HAPS currently needs to provide, and based on the total transmission power of the HAPS and the uplink data transmission power that the HAPS currently needs to provide, determine the downlink data transmission power that the HAPS currently can provide; B value determination step: Based on the downlink data transmission power that the HAPS currently can provide and the channel capacity requirements of each downlink data transmission request in the downlink request sequence, determine the current value of B; The first iteration step: Repeat the A value selection step, the uplink and downlink transmission power determination step, and the B value determination step until all the multiple first candidate values are traversed; Based on different values of A and B, determine the optimal values of A and B that satisfy the maximum of (A + B) / (Nul + Ndl).

9. An electronic device, comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, characterized in that, When the processor executes the program, it implements the data transmission method of the space-air-ground integrated network according to any one of claims 1 to 6.

10. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the data transmission method of the space-air-ground integrated network according to any one of claims 1 to 6.

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