Single-slot access optimization method, device, equipment, storage medium and program product

Abstract

The application relates to the technical field of low-altitude communication, and provides a single-time-slot access optimization method, device, equipment, storage medium and program product, the method comprising the following steps: acquiring the receiving channel gain and the detection channel gain of each user terminal to be accessed to a communication satellite and constructing an optimization target; the optimization target comprises a concealment target and a reliability target; constructing a target function by taking the minimization of the concealment target as a main target and the maximization of the reliability target as a secondary target, solving the optimal solution of the target function, and optimizing the uplink access signal of the user terminal according to the transmission power distribution strategy corresponding to the optimal solution. The concealment and reliability of the multi-terminal single-time-slot access are double-target joint optimized, an optimal balance between the access concealment and the reliability is realized, the concealed and reliable access of the multi-user terminal single time slot is ensured, and the safety of the low-altitude communication is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of low-altitude communication, and in particular to a single-time-slot access optimization method, device, equipment, storage medium and program product. BACKGROUND

[0002] With the development of low-altitude economy, low-altitude applications such as unmanned aerial vehicle logistics and low-altitude transportation are increasing, and the safety problem of low-altitude communication is increasingly prominent. The rapid development of electronic reconnaissance satellites makes the communication signals of low-altitude aircraft easy to be intercepted and cracked. The traditional communication access method cannot meet the safety and concealment requirements of communication for low-altitude communication satellites.

[0003] In particular, in the scene of multi-user satellite covert communication, the traditional single-time-slot random access method has defects such as imbalance between concealment and reliability, and insufficient use of capture effect. For example, for the contradiction between concealment and reliability, the high-power transmission of the access signal of the terminal such as unmanned aerial vehicle can improve the receiving reliability of the communication satellite, but it is easy to be found by the reconnaissance satellite through energy detection. Low-power transmission of the access signal can reduce the probability of being intercepted, but it is easy to cause the communication satellite to fail to receive when multiple users collide. For the problem of insufficient use of capture effect, the existing multi-user access method based on time slot improvement ignores the capture effect of "strong signal suppressing weak signal". For the related optimization of multi-user single-time-slot access, there is a problem of missing double-objective optimization of concealment and reliability, which cannot balance concealment and reliability. SUMMARY

[0004] The present application provides a single-time-slot access optimization method, device, equipment, storage medium and program product to solve the problem of missing double-objective optimization of concealment and reliability in the access method of multi-user single-time-slot in low-altitude communication, and the defect of inability to balance concealment and reliability.

[0005] The present application provides a single-time-slot access optimization method, which comprises the following steps:

[0006] Obtain the gain parameters of each user terminal to be accessed to the communication satellite; the user terminals include multiple, and the gain parameters include the receiving channel gain and the interception channel gain;

[0007] Construct an optimization target based on the gain parameters; the optimization target includes a concealment target corresponding to the interception channel gain and a reliability target corresponding to the receiving channel gain; the concealment target represents the total power of the uplink access signal of the reconnaissance satellite to detect each user terminal accessing the communication satellite, and the reliability target represents the signal-to-interference-plus-noise ratio of the uplink access signal of the target user terminal accessing the communication satellite; the target user terminal is the user terminal with the maximum transmission power of the uplink access signal;

[0008] constructing an objective function with a main target of minimizing the concealability target and a secondary target of maximizing the reliability target;

[0009] solving an optimal solution of the objective function, and optimizing the uplink access signals of the user terminals according to the optimal solution; the optimal solution corresponds to a distribution strategy of the transmission power of the uplink access signals of each user terminal.

[0010] According to the single-time-slot access optimization method provided by the application, the optimization target is constructed based on the gain parameter, which comprises:

[0011] taking the transmission power of the uplink access signals of each user terminal as a decision variable, and weighting and summing the decision variables corresponding to each user terminal by using the detection channel gain to obtain the concealability target;

[0012] calculating the signal-to-interference-plus-noise ratio of the decision variable of the target user terminal based on the reception channel gain to obtain the reliability target.

[0013] According to the single-time-slot access optimization method provided by the application, the reliability target is obtained by calculating the signal-to-interference-plus-noise ratio of the decision variable of the target user terminal based on the reception channel gain, which comprises:

[0014] weighting the decision variable of the target user terminal by using the reception channel gain of the target user terminal to obtain the access power of the target user terminal;

[0015] weighting and summing the decision variables of each first user terminal by using the reception channel gain of each first user terminal to obtain the total access power of each first user terminal; the first user terminal is other user terminal except the target user terminal in each user terminal;

[0016] obtaining the receiver noise power of the communication satellite, and calculating the sum of the receiver noise power and the total access power to obtain the total interference signal power;

[0017] calculating the signal-to-interference-plus-noise ratio of the target user terminal according to the access power and the total interference signal power to obtain the reliability target; the signal-to-interference-plus-noise ratio is the ratio of the access power to the total interference signal power.

[0018] According to the single-time-slot access optimization method provided by the application, the optimal solution of the objective function is solved, which comprises:

[0019] constructing a first constraint condition based on the power range of the transmission power of the uplink access signals of each user terminal and the reception power threshold of the uplink access signals;

[0020] under the constraint of the first constraint condition, solving a Pareto optimal solution of the target function by using a constraint method.

[0021] According to the single time slot access optimization method provided by the application, under the constraint of the first constraint condition, a Pareto optimal solution of the target function is solved by using a constraint method.

[0022] a preset threshold parameter of a signal to interference plus noise ratio is taken as a constraint parameter, and a secondary target of the target function is converted into a second constraint condition based on the constraint parameter;

[0023] under the constraint of the first constraint condition and the second constraint condition, a Pareto optimal solution of the main target is solved.

[0024] According to the single time slot access optimization method provided by the application, under the constraint of the first constraint condition and the second constraint condition, a Pareto optimal solution of the main target is solved.

[0025] a minimum signal to interference plus noise ratio and an optimal signal to interference plus noise ratio are initialized, and under the constraint of the first constraint condition, a transmission power of an uplink access signal of each user terminal is initialized;

[0026] a maximum transmission power in each user terminal is determined, and a difference between a maximum signal to interference plus noise ratio of a target user terminal corresponding to the maximum transmission power and the minimum signal to interference plus noise ratio is calculated;

[0027] if the difference is greater than a preset convergence tolerance, an average value of the maximum signal to interference plus noise ratio and the minimum signal to interference plus noise ratio is calculated, the average value is taken as a parameter value of the constraint parameter, and under the constraint of the second constraint condition, a feasible solution of the main target is solved;

[0028] if the main target has a feasible solution, the minimum signal to interference plus noise ratio and the optimal signal to interference plus noise ratio are updated based on the average value;

[0029] if the main target has no feasible solution, the maximum signal to interference plus noise ratio is updated based on the average value;

[0030] the step of determining the maximum transmission power in each user terminal and calculating the difference between the maximum signal to interference plus noise ratio of the target user terminal corresponding to the maximum transmission power and the minimum signal to interference plus noise ratio is returned and executed until the difference is less than or equal to the preset convergence tolerance, and a Pareto optimal solution of the main target is determined according to the feasible solution. ​​

[0031] The application further provides a single time slot access optimization device, comprising the following modules:

[0032] A parameter acquisition module is configured to acquire gain parameters of each user terminal to be accessed to a communication satellite; the user terminals comprise a plurality of user terminals, and the gain parameters comprise a receiving channel gain and a detection channel gain;

[0033] A target construction module is configured to construct an optimization target based on the gain parameters; the optimization target comprises a concealment target corresponding to the detection channel gain and a reliability target corresponding to the receiving channel gain; the concealment target represents total detection power of an uplink access signal of each user terminal to be accessed to the communication satellite by a detection satellite, and the reliability target represents a signal to interference plus noise ratio of an uplink access signal of a target user terminal to be accessed to the communication satellite; the target user terminal is a user terminal with the largest transmission power of the uplink access signal;

[0034] A function construction module is configured to construct a target function by taking minimization of the concealment target as a primary target and maximization of the reliability target as a secondary target;

[0035] A function solution module is configured to solve an optimal solution of the target function, and to optimize the uplink access signal of the user terminal according to the optimal solution; the optimal solution corresponds to a transmission power distribution strategy of the uplink access signal of each user terminal.

[0036] The application further provides an electronic device comprising a memory, a processor, and a computer program stored in the memory and capable of running on the processor; when the processor executes the computer program, the single time slot access optimization method is realized.

[0037] The application further provides a non-transitory computer readable storage medium, which stores a computer program; when the computer program is executed by a processor, the single time slot access optimization method is realized.

[0038] The application further provides a computer program product comprising a computer program; when the computer program is executed by a processor, the single time slot access optimization method is realized.

[0039] The single time slot access optimization method, device, equipment, storage medium and program product provided by the application, by acquiring the gain parameters of each user terminal of the communication satellite to be accessed, taking the target of minimizing the total power of the user terminal uplink access signal on the detection channel as the main target, taking the target of maximizing the signal-to-interference-plus-noise ratio of the target user terminal signal with the maximum uplink access signal transmission power on the receiving channel as the secondary target, constructing the objective function, solving the optimal solution of the objective function, realizing the joint optimization of the concealment and reliability of the terminal single time slot access, and according to the distribution strategy of the transmission power of the uplink access signal of each user terminal corresponding to the optimal solution, optimizing the uplink access signal of the user terminal, so that the terminal can access the communication satellite without being detected, realizing the concealed access and communication. Through the joint optimization of the concealment and reliability of the terminal single time slot access, the concealed and reliable access of multiple user terminals is realized, and the security of low-altitude communication is improved. BRIEF DESCRIPTION OF DRAWINGS

[0040] In order to more clearly illustrate the technical solutions in the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0041] Figure 1 is a flowchart of the single time slot access optimization method provided by the application.

[0042] Figure 2 is a communication scenario diagram of the single time slot multi-user access provided by the application.

[0043] Figure 3 is a structural diagram of the single time slot access optimization device provided by the application.

[0044] Figure 4 is a structural diagram of the electronic device provided by the application. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical scheme and advantages of the application more clear, the technical scheme in the application will be described clearly and completely in the following combined with the drawings in the application. Obviously, the described embodiments are part of the embodiments of the application, not all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the application.

[0046] The embodiment of the present application provides a single time slot access optimization method, relates to resource optimization of satellite communication, in particular single time slot resource optimization of a communication satellite in a low-altitude field, multi-user single time slot access optimization based on capture effect, and can balance concealment and reliability of access. By optimizing the transmission power of the uplink access signal of multi-user access under the single time slot, the probability that the access terminal is detected by an electronic reconnaissance satellite is reduced, the concealment and anti-reception capability of low-altitude communication are improved, security is provided for terminals such as unmanned aerial vehicles in low-altitude communication, communication signals are ensured not to be intercepted, and the safe development of low-altitude economy is facilitated.

[0047] Specifically, Figure 1 The flowchart of the single time slot access optimization method provided by the present application is as shown in the figure, Figure 1 The method comprises the following steps:

[0048] In step 100, gain parameters of each user terminal to be accessed to a communication satellite are acquired; the user terminals comprise a plurality of user terminals, and the gain parameters comprise a receiving channel gain and a reconnaissance channel gain;

[0049] In step 200, an optimization target is constructed based on the gain parameters; the optimization target comprises a concealment target corresponding to the reconnaissance channel gain and a reliability target corresponding to the receiving channel gain; the concealment target represents total reconnaissance power of an uplink access signal of each user terminal to be accessed to the communication satellite detected by a reconnaissance satellite, and the reliability target represents a signal-to-interference-plus-noise ratio of an uplink access signal of a target user terminal to be accessed to the communication satellite; the target user terminal is a user terminal with the maximum transmission power of the uplink access signal;

[0050] In step 300, a target function is constructed by taking minimization of the concealment target as a main target and maximization of the reliability target as a secondary target;

[0051] In step 400, an optimal solution of the target function is solved, and an uplink access signal of the user terminal is optimized according to the optimal solution; the optimal solution corresponds to a distribution strategy of transmission power of the uplink access signal of each user terminal.

[0052] Gain parameters of each user terminal to be accessed to a communication satellite are acquired, the gain parameters comprise a receiving channel gain and a reconnaissance channel gain, wherein the user terminals comprise a plurality of user terminals, and the user terminals can be aircrafts such as unmanned aerial vehicles. The gain parameters of the user terminals are specifically gain parameters of transmission power of uplink access signals of the user terminals.

[0053] The reception channel gain is a gain weight used for weighting the uplink access signal of the communication satellite received by the user terminal, and represents the power enhancement effect of the signal transmitted by the user terminal to the communication satellite. The detection channel gain is a gain weight used for weighting the uplink access signal of the communication satellite detected by the reconnaissance satellite, and represents the power enhancement effect of the signal transmitted by the user terminal to the reconnaissance satellite.

[0054] Further, the reception channel gain is related to the antenna type and directivity of the user terminal, the spatial path loss between the user terminal and the communication satellite, and environmental effects. Correspondingly, the detection channel gain is related to the antenna type and directivity of the user terminal, the spatial path loss between the user terminal and the reconnaissance satellite, and environmental effects.

[0055] Based on the gain parameters, the single-slot access of the user terminal is modeled, and an objective function is constructed. In the modeling process, the transmission power of the uplink access signal of the user terminal in the single-slot access is taken as a decision variable, an optimization objective is constructed based on the decision variable and its gain parameters, and the objective function is constructed based on the optimization objective. Specifically, the optimization objective constructed includes a concealment objective corresponding to the detection channel gain and a reliability objective corresponding to the reception channel gain, and the objective function is constructed to minimize the concealment objective as the main objective and maximize the reliability objective as the secondary objective.

[0056] Further, the concealment objective represents the total detection power of the uplink access signal of each user terminal accessing the communication satellite detected by the reconnaissance satellite, and the reliability objective represents the signal-to-interference-plus-noise ratio of the uplink access signal of the target user terminal accessing the communication satellite, and the target user terminal is defined as the user terminal with the maximum transmission power of the uplink access signal.

[0057] Based on the constructed optimization objective, the objective function is constructed, specifically to minimize the concealment objective as the main objective, and to maximize the reliability objective as the secondary objective. Based on this, the constructed objective function minimizes the concealment objective as the main objective, and maximizes the reliability objective as the secondary objective, achieving the joint optimization of concealment and reliability.

[0058] The optimal solution of the objective function is solved, and based on the joint optimization of concealment and reliability by the objective function, the optimal solution of the objective function can balance the concealment and reliability of the user terminal access, thereby ensuring that the user terminal accesses the communication satellite without being detected by the reconnaissance satellite, and realizing the concealed access.

[0059] Furthermore, the optimal solution of the objective function corresponds to the optimal power allocation strategy for the uplink access signal of each user terminal in a single time slot. Based on this optimal solution, the transmit power of the uplink access signal of the user terminal is optimized. The optimization methods include, but are not limited to, controlling the transmit power of the uplink access signal of each user terminal when accessing the communication satellite based on the target transmit power of the uplink access signal of each user terminal corresponding to the optimal solution, thereby achieving multi-user single-time slot access optimization.

[0060] Reference Figure 2 The diagram illustrates a multi-user single-timeslot access communication scenario. In one embodiment, it is assumed that K terminals access the communication satellite, but in the low-altitude domain, both low-Earth orbit (LEO) communication satellites and high-Earth orbit (HEO) / low-Earth orbit (LEO) reconnaissance satellites (electronic reconnaissance satellites) coexist. The LEO communication satellites are configured according to... Figure 2 The trajectory shown depicts the movement of the communication satellite from position 1 to position 2. High-orbit / low-orbit reconnaissance satellites continuously intercept the uplink access signals from the terminal. When the uplink access signal from the electronic reconnaissance satellite exceeds the detection threshold, it is considered that the terminal has been successfully intercepted, and the user terminal's covert communication has failed. For a cluster of terminals, if the uplink signals from multiple user terminals collide, energy superposition occurs, greatly increasing the probability of the cluster being detected.

[0061] like Figure 2 As shown, K terminals (terminal 1 to terminal K) form a cluster. During time slot 1, the communication satellite is at position 1, and the cluster's location is within the satellite's signal coverage area. During time slot n, the communication satellite is at position 2, and the cluster's location is still within the satellite's signal coverage area. The cluster performs its mission in the flight direction from the signal coverage area of ​​communication satellite position 1 to the signal coverage area of ​​communication satellite position 2 during the time period corresponding to time slots 1 to n. Figure 2 In this embodiment, the signal coverage of the communication satellite at positions 1 and 2 is within the reconnaissance range of the high-orbit / low-orbit reconnaissance satellite. By adopting the single-time-slot access optimization method provided in this embodiment, the transmission power of the uplink access signal of each terminal is controlled according to the power allocation strategy corresponding to the optimal solution of the objective function. This allows each terminal in the cluster to access the communication satellite without being detected by the high-orbit / low-orbit reconnaissance satellite, thereby achieving covert access and communication of the cluster and ensuring communication security.

[0062] In the embodiment, by acquiring the gain parameters of each user terminal to be accessed to the communication satellite, and taking the concealment target corresponding to the minimum total power of the user terminal uplink access signal on the detection channel as the main target, and taking the reliability target corresponding to the signal to interference plus noise ratio of the target user terminal signal with the maximum uplink access signal transmission power on the receiving channel as the secondary target, a target function is constructed, the optimal solution of the target function is solved, the joint optimization of the concealment and reliability of the terminal single time slot access is realized, and the uplink access signal of the user terminal is optimized according to the distribution strategy of the transmission power of the uplink access signal of each user terminal corresponding to the optimal solution, so that the terminal can access the communication satellite without being detected, and the concealed access and communication are realized. Through the double target joint optimization of the concealment and reliability of the terminal single time slot access, the optimal balance between the access concealment and reliability is realized, the concealed and reliable access of the multiple user terminals is ensured, and the security of the low-altitude communication is improved.

[0063] The optimization target is constructed based on the gain parameters, the transmission power of the uplink access signal of each user terminal is taken as the decision variable, the decision variable is weighted based on the detection channel gain and the receiving channel gain in the gain parameters, the target function is constructed, the optimal solution of the decision variable of the multiple user terminals is solved, and the power distribution strategy of the uplink access signal of the user terminal is obtained. Based on this, step 200 includes:

[0064] In step 210, the transmission power of the uplink access signal of each user terminal is taken as the decision variable, the detection channel gain is used to weight and sum the decision variables corresponding to each user terminal, and the concealment target is obtained.

[0065] In step 220, the signal to interference plus noise ratio of the decision variable of the target user terminal is calculated based on the receiving channel gain, and the reliability target is obtained.

[0066] The transmission power of the uplink access information of each user terminal is taken as the decision variable, that is, the parameter to be solved, the detection channel gain is used to weight and sum the decision variables corresponding to each user terminal, and the concealment target is constructed. Based on the receiving channel gain, the signal to interference plus noise ratio (SINR) of the decision variable of the target user terminal is calculated, and the reliability target is constructed.

[0067] The reliability target is constructed based on the signal to interference plus noise ratio of the user terminal with the maximum uplink access signal transmission power, and the maximum reliability target is taken as the secondary target, so that the access signal of the SINR dominant user terminal can be successfully received by the communication satellite.

[0068] In one embodiment, it is assumed that there are K user terminals, which are denoted as user The receive channel gain of each user terminal is denoted as: wherein denotes the receive channel gain of the user The intercept channel gain is denoted as: wherein, denotes the gain weight of the user in the intercept channel.

[0069] The transmit power of the uplink access signal of each user terminal is taken as a decision variable, denoted as , which constitutes For the concealment target, the decision variables of each user terminal are weighted and summed based on the intercept channel gain to obtain the total intercept power as the concealment target.

[0070] For the reliability target, step 220 further includes:

[0071] Step 221, the decision variable of the target user terminal is weighted using the receive channel gain of the target user terminal to obtain the access power of the target user terminal;

[0072] Step 222, the decision variables of each first user terminal are weighted and summed using the receive channel gain of each first user terminal to obtain the total access power of each first user terminal; the first user terminal is other user terminal in addition to the target user terminal among the user terminals;

[0073] Step 223, the receiver noise power of the communication satellite is obtained, and the sum of the receiver noise power and the total access power is calculated to obtain the total power of the interference signal;

[0074] Step 224, the signal-to-interference-plus-noise ratio of the target user terminal is calculated according to the access power and the total power of the interference signal to obtain the reliability target; the signal-to-interference-plus-noise ratio is the ratio of the access power to the total power of the interference signal.

[0075] The decision variable of the target user terminal is weighted using the receive channel gain of the target user terminal as the access power (or called receive power) of the uplink access signal of the target user terminal. The decision variables of each first user terminal are weighted and summed using the receive channel gain of each first user terminal to obtain the total access power (or called total receive power) of each first user terminal. Among them, the first user terminal is other user terminal in addition to the target user terminal among all user terminals, and the target user terminal is the user terminal with the maximum transmit power of the uplink access signal among all user terminals.

[0076] Further, the receiver noise power of the communication satellite is acquired, the sum of the receiver noise power and the total access power of the first user terminal is calculated to obtain the total interference signal power, and then the ratio of the access power of the target user terminal to the total interference signal power is obtained to obtain the signal-to-interference-plus-noise ratio of the target user terminal, which is the reliability target to be constructed.

[0077] In one embodiment, the target user terminal is denoted as The access power of the target user terminal is The total access power of the first user terminal is The receiver noise power is The reliability target is shown in the following formula 1:

[0078] ; (1)

[0079] Based on this, the target function is shown in the following formula 2:

[0080] ; ; (2)

[0081] The transmission power of the uplink access signal of the user terminal is taken as a parameter to be solved, the target function is solved to obtain an optimal solution, and the transmission power of the uplink access signal of each user terminal is controlled according to the power allocation strategy corresponding to the optimal solution, so as to realize the concealed reliable access of the user terminal.

[0082] Further, when the target function is solved, the constraint condition of the target function needs to be determined first, and the optimal solution of the target function is solved under the constraint condition. Specifically, in step 400, the optimal solution of the target function is solved, including:

[0083] In step 410, a first constraint condition is constructed based on the power range of the transmission power of the uplink access signal of each user terminal and the reception power threshold of the uplink access signal.

[0084] In step 420, the Pareto optimal solution of the target function is solved by using the constraint method under the constraint of the first constraint condition.

[0085] Based on the power range of the transmission power of the uplink access signal of each user terminal and the reception power threshold of the uplink access signal, a first constraint condition is constructed, and the Pareto optimal solution of the target function is solved by using the constraint method under the constraint of the first constraint condition. The Pareto optimal solution is an ideal state of resource allocation, and in this embodiment, the Pareto optimal solution corresponds to the optimal allocation strategy of the transmission power of the uplink access signal of different user terminals under a single time slot.

[0086] For the first constraint condition, including the transmit power constraint, that is, the power range corresponding to the upper and lower limits of the transmit power, can be recorded as: ; the receive power threshold That is, the receive reliability constraint is the power threshold that ensures that the communication satellite can receive the access signal of the user terminal, recorded as The transmit power of the uplink access signal of each user terminal is not lower than the receive power threshold after being enhanced by the receive channel gain.

[0087] Optionally, the upper and lower limits of the transmit power corresponding to different user terminals can be the same or different, and in the embodiment, each user terminal corresponds to an upper and lower limit of the transmit power.

[0088] Further, under the constraint of the first constraint condition, the target function is solved by using The constraint method is used to solve the Pareto optimal solution of the target function, that is, a threshold is used to convert the secondary target of the target function into a constraint condition, and the main target is solved. Based on this, step 420 includes:

[0089] Step 421, taking the preset threshold parameter of the signal-to-interference-plus-noise ratio as a constraint parameter, converting the secondary target of the target function into a second constraint condition based on the constraint parameter;

[0090] Step 422, under the constraint of the first constraint condition and the second constraint condition, solving the Pareto optimal solution of the main target.

[0091] Taking the preset threshold parameter of the signal-to-interference-plus-noise ratio as a constraint parameter, converting the secondary target of the target function into a second constraint condition based on the constraint parameter, and solving the Pareto optimal solution of the main target under the constraint of the first constraint condition and the second constraint condition. The second constraint condition is:

[0092] ; (3)

[0093] Wherein, is a preset SINR threshold parameter, and different Pareto optimal solutions can be solved by adjusting the value of .

[0094] Further, step 422 further includes:

[0095] Step 4221, initializing the minimum transmit power and the optimal transmit power, and initializing the transmit power of the uplink access signal of each user terminal under the constraint of the first constraint condition;

[0096] Step 4222, determining the maximum transmit power in each of the user terminals, and calculating the difference between the maximum signal-to-interference-plus-noise ratio of the target user terminal corresponding to the maximum transmit power and the minimum signal-to-interference-plus-noise ratio;

[0097] Step 4223, in the case that the difference is greater than the preset convergence tolerance, calculating the average of the maximum signal-to-interference-plus-noise ratio and the minimum signal-to-interference-plus-noise ratio, and taking the average as the parameter value of the constraint parameter, and solving the feasible solution of the main target under the constraint of the second constraint condition;

[0098] Step 4224, if the main target has a feasible solution, updating the minimum signal-to-interference-plus-noise ratio and the optimal signal-to-interference-plus-noise ratio based on the average;

[0099] Step 4225, if the main target has no feasible solution, updating the maximum signal-to-interference-plus-noise ratio based on the average;

[0100] Step 4226, returning and executing the step of determining the maximum transmit power in each of the user terminals, and calculating the difference between the maximum signal-to-interference-plus-noise ratio of the target user terminal corresponding to the maximum transmit power and the minimum signal-to-interference-plus-noise ratio, until the difference is less than or equal to the preset convergence tolerance, and determining the Pareto optimal solution of the main target according to the feasible solution.

[0101] In the process of solving the Pareto optimal solution of the main target, the minimum signal-to-interference-plus-noise ratio and the optimal signal-to-interference-plus-noise ratio are first initialized, and the transmit power of the uplink access signal of each user terminal is initialized under the constraint of the first constraint condition. The initialization values of the minimum signal-to-interference-plus-noise ratio and the optimal signal-to-interference-plus-noise ratio can be 0, the transmit power of the uplink access signal of each user terminal satisfies the first constraint condition, that is, the transmit power of the uplink access signal of the user terminal is within the upper and lower limits of the respective transmit power, and the corresponding received power is greater than the received power threshold, and the transmit power of the uplink access signal of each user terminal forms the initial solution of the main target. Based on the initial value of the transmit power of the uplink access signal of each user terminal, the maximum transmit power of each user terminal is determined, and the maximum signal-to-interference-plus-noise ratio of the target user terminal corresponding to the maximum transmit power is calculated, and the difference between the maximum signal-to-interference-plus-noise ratio and the minimum signal-to-interference-plus-noise ratio is calculated.

[0102] Further, in case that the difference between the maximum signal-to-interference-plus-noise ratio and the minimum signal-to-interference-plus-noise ratio of the target user terminal is greater than the preset convergence tolerance, the average of the maximum signal-to-interference-plus-noise ratio and the minimum signal-to-interference-plus-noise ratio of the target user terminal is calculated, and the calculated average is taken as the parameter value of the constraint parameter in the second constraint condition, i.e., the calculated average is taken as the parameter value of the SINR threshold parameter , and the feasible solution of the main target is solved under the constraint of the second constraint condition.

[0103] In case that the feasible solution exists, the minimum signal-to-interference-plus-noise ratio and the optimal signal-to-interference-plus-noise ratio are updated based on the average of the maximum signal-to-interference-plus-noise ratio and the minimum signal-to-interference-plus-noise ratio; in case that the feasible solution does not exist, the maximum signal-to-interference-plus-noise ratio is updated based on the average of the maximum signal-to-interference-plus-noise ratio and the minimum signal-to-interference-plus-noise ratio.

[0104] In which, the minimum signal-to-interference-plus-noise ratio and the optimal signal-to-interference-plus-noise ratio are updated based on the average of the maximum signal-to-interference-plus-noise ratio and the minimum signal-to-interference-plus-noise ratio, i.e., the average of the maximum signal-to-interference-plus-noise ratio and the minimum signal-to-interference-plus-noise ratio is taken as the value of the minimum signal-to-interference-plus-noise ratio and the optimal signal-to-interference-plus-noise ratio. The maximum signal-to-interference-plus-noise ratio is updated based on the average of the maximum signal-to-interference-plus-noise ratio and the minimum signal-to-interference-plus-noise ratio, i.e., the average of the maximum signal-to-interference-plus-noise ratio and the minimum signal-to-interference-plus-noise ratio is taken as the maximum signal-to-interference-plus-noise ratio.

[0105] Finally, after the parameters are updated, the maximum transmission power in the uplink access signal of each user terminal is re-determined, and the difference between the maximum signal-to-interference-plus-noise ratio and the minimum signal-to-interference-plus-noise ratio of the target user terminal corresponding to the maximum transmission power is calculated, until the difference is less than or equal to the preset convergence tolerance, the Pareto optimal solution of the main target is determined according to the feasible solution of the main target.

[0106] In one embodiment, for the given K user terminals , the objective function is solved based on the acquired reception channel gain , the interception channel gain , the receiver noise power , the convergence tolerance tolerance, the lower limit of the transmission power and the upper limit of the transmission power . In which, the lower limit of the transmission power is determined considering the reception power threshold .

[0107] First, the minimum signal-to-interference-plus-noise ratio and the optimal signal-to-interference-plus-noise ratio , i.e. the minimum SINR value and the optimal SINR value is 0. Under the constraint of the first constraint condition, the transmission power of the uplink access signal of each user terminal is initialized, and the maximum transmission power is determined, based on which the maximum signal-to-interference-plus-noise ratio of the corresponding target user terminal is calculated, i.e. the maximum SINR value :

[0108] ; (4)

[0109] Optionally, the Pareto optimal solution , i.e. the Pareto optimal solution is initialized as an empty set. Then, the solution is performed according to the following formulas 5-7:

[0110] The difference between and is calculated, and in the case of , the average value of the maximum SINR value and the minimum SINR value is calculated as the target SINR:

[0111] ; (5)

[0112] A linear programming problem is constructed, and the programming target is to minimize the total power of detection:

[0113] ; (6)

[0114] The constraint conditions include the first constraint condition determined based on the upper and lower limits of the transmission power and the second constraint condition of the secondary target conversion, the first constraint condition is the transmission power boundary: , and the second constraint condition is to take as the SINR constraint of value, as shown in the following formula 7:

[0115] ; (7)

[0116] Under the constraint of the first constraint condition and the second constraint condition, the linear programming problem corresponding to the main target is solved by using linprog or the like, and the optimal power allocation P under the current round single time slot is obtained as the Pareto feasible solution.

[0117] In the solving process, if there is a feasible solution, then , and are updated, and is assigned to and , and the optimal power allocation P is assigned to .

[0118] If the feasible solution does not exist, update , and is assigned to .

[0119] Based on the updated and , or the updated , the maximum transmission power is re-determined, a new is calculated, and the difference between and is calculated until the calculated difference is less than or equal to a convergence tolerance tolerance, and a Pareto optimal solution of the primary target is determined according to the feasible solution of the primary target in . The Pareto optimal solution can be the optimal solution in the feasible solution in .

[0120] In an embodiment, by repeatedly solving the double-target optimization problem, a Pareto frontier is drawn based on the Pareto optimal solution under different values, and an optimal solution is selected from the Pareto frontier as a trade-off solution of concealment and reliability according to actual needs. Compared with randomly selecting transmission power, the total power of multi-user single-slot received by the reconnaissance satellite after optimization is greatly reduced.

[0121] In this embodiment, through the double-target collaborative optimization of concealment and reliability, the synchronous improvement and balance of concealment and reliability can be realized, and the constraint method is used for solving, the nonlinear double-target optimization problem is converted into the solving of linear sub-problems, the calculation complexity is reduced, and the real-time optimization of the transmission power of the high-speed flying terminal is suitable for the rapid access demand of the low-orbit communication satellite and other high-speed platforms.

[0122] Further, the capture effect of the communication satellite on the user terminal is introduced into the optimization of the multi-user transmission power of the single-slot access, a quantitative trade-off model of concealment and reliability is established, the double-target joint optimization of concealment and reliability is realized, the total power of the reconnaissance is minimized, the SINR of the user terminal under the capture effect is maximized, the concealment and reliability are balanced, the power balanced allocation among the multi-user terminals under the single-slot is realized, the probability of the user terminal being detected by the electronic reconnaissance satellite under the single-slot access scenario is greatly reduced, and the access and communication safety is improved.

[0123] The single-slot access optimization device provided by the present application is described below, and the single-slot access optimization device described below can be correspondingly referred to the single-slot access optimization method described above.

[0124] Referring to Figure 3The embodiment of the present application provides a single time slot access optimization device, comprising:

[0125] A parameter acquisition module 10 is configured to acquire gain parameters of each user terminal to be accessed to a communication satellite; the user terminals comprise a plurality of user terminals, and the gain parameters comprise a receiving channel gain and a detection channel gain;

[0126] A target construction module 20 is configured to construct an optimization target based on the gain parameters; the optimization target comprises a concealment target corresponding to the detection channel gain and a reliability target corresponding to the receiving channel gain; the concealment target represents total detection power of an uplink access signal of each user terminal to be accessed to the communication satellite by a detection satellite, and the reliability target represents a signal-to-interference-plus-noise ratio of an uplink access signal of a target user terminal to be accessed to the communication satellite; the target user terminal is a user terminal with the maximum transmitting power of the uplink access signal;

[0127] A function construction module 30 is configured to construct a target function by taking minimization of the concealment target as a primary target and maximization of the reliability target as a secondary target;

[0128] A function solution module 40 is configured to solve an optimal solution of the target function, and optimize the uplink access signal of each user terminal according to the optimal solution; the optimal solution corresponds to a distribution strategy of the transmitting power of the uplink access signal of each user terminal.

[0129] In one embodiment, the target construction module 20 is further configured to:

[0130] The transmitting power of the uplink access signal of each user terminal is taken as a decision variable, the decision variable corresponding to each user terminal is weighted and summed by using the detection channel gain, and the concealment target is obtained;

[0131] The signal-to-interference-plus-noise ratio of the decision variable of the target user terminal is calculated based on the receiving channel gain, and the reliability target is obtained.

[0132] In one embodiment, the target construction module 20 is further configured to:

[0133] The decision variable of the target user terminal is weighted by using the receiving channel gain of the target user terminal, and the access power of the target user terminal is obtained;

[0134] The decision variable of each first user terminal is weighted and summed by using the receiving channel gain of each first user terminal, and the total access power of each first user terminal is obtained; the first user terminal is a user terminal other than the target user terminal in each user terminal;

[0135] obtaining a receiver noise power of the communication satellite, and calculating a sum of the receiver noise power and the access total power to obtain a total interference signal power;

[0136] calculating a signal to interference plus noise ratio of the target user terminal according to the access power and the total interference signal power to obtain a reliability target; the signal to interference plus noise ratio is a ratio of the access power to the total interference signal power.

[0137] In one embodiment, the function solving module 40 is further configured to:

[0138] constructing a first constraint condition based on a power range of a transmission power of an uplink access signal of each user terminal and a reception power threshold of the uplink access signal;

[0139] solving a Pareto optimal solution of the target function by using a constraint method under the constraint of the first constraint condition.

[0140] In one embodiment, the function solving module 40 is further configured to:

[0141] taking a preset threshold parameter of a signal to interference plus noise ratio as a constraint parameter, and converting a secondary target of the target function into a second constraint condition based on the constraint parameter;

[0142] solving a Pareto optimal solution of the primary target under the constraint of the first constraint condition and the second constraint condition.

[0143] In one embodiment, the function solving module 40 is further configured to:

[0144] initializing a minimum signal to interference plus noise ratio and an optimal signal to interference plus noise ratio, and initializing a transmission power of an uplink access signal of each user terminal under the constraint of the first constraint condition;

[0145] determining a maximum transmission power in each user terminal, and calculating a difference between a maximum signal to interference plus noise ratio of a target user terminal corresponding to the maximum transmission power and the minimum signal to interference plus noise ratio;

[0146] in a case where the difference is greater than a preset convergence tolerance, calculating an average value of the maximum signal to interference plus noise ratio and the minimum signal to interference plus noise ratio, taking the average value as a parameter value of the constraint parameter, and solving a feasible solution of the primary target under the constraint of the second constraint condition;

[0147] if the primary target has a feasible solution, updating the minimum signal to interference plus noise ratio and the optimal signal to interference plus noise ratio based on the average value; ​

[0148] if the main target has no feasible solution, updating the maximum signal-to-interference-plus-noise ratio based on the average value;

[0149] returning to and performing the steps of determining the maximum transmission power in each of the user terminals and calculating the difference between the maximum signal-to-interference-plus-noise ratio corresponding to the target user terminal with the maximum transmission power and the minimum signal-to-interference-plus-noise ratio until the difference is less than or equal to a preset convergence tolerance, and determining the Pareto optimal solution of the main target according to the feasible solution.

[0150] Figure 4 An example of a schematic diagram of the physical structure of an electronic device is shown in Figure 4 The electronic device can include a processor 410, a communications interface 420, a memory 430, and a communications bus 440, wherein the processor 410, the communications interface 420, and the memory 430 communicate with each other through the communications bus 440. The processor 410 can invoke the logical instructions in the memory 430 to perform the steps of the single-time-slot access optimization method, for example, including:

[0151] obtaining gain parameters of each user terminal to be accessed to a communications satellite; the user terminals include a plurality of user terminals, and the gain parameters include a reception channel gain and a detection channel gain;

[0152] constructing an optimization target based on the gain parameters; the optimization target includes a concealment target corresponding to the detection channel gain and a reliability target corresponding to the reception channel gain; the concealment target represents the total detection power of the reconnaissance satellite detecting the uplink access signals of each of the user terminals accessing the communications satellite, and the reliability target represents the signal-to-interference-plus-noise ratio of the uplink access signals of the target user terminal accessing the communications satellite; the target user terminal is the user terminal with the maximum transmission power of the uplink access signals;

[0153] constructing a target function with the minimum concealment target as the main target and the maximum reliability target as the secondary target;

[0154] solving the optimal solution of the target function and optimizing the uplink access signals of the user terminals according to the optimal solution; the optimal solution corresponds to the allocation strategy of the transmission power of the uplink access signals of each of the user terminals.

[0155] Moreover, the logic instructions in the memory 430 described above can be implemented in the form of software functional units and sold or used as independent products, and can be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the present application essentially or the parts that contribute to the prior art or parts of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium, and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application. The foregoing storage medium includes various media that can store program codes, such as U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disk or optical disk, etc.

[0156] In another aspect, the present application also provides a computer program product, which comprises a computer program, the computer program can be stored on a non-transitory computer readable storage medium, and the computer program can be executed by a processor to enable a computer to execute the steps of the single time slot access optimization method provided by the above-mentioned methods, for example, including:

[0157] obtaining gain parameters of each user terminal to be accessed to a communication satellite; the user terminals include a plurality of user terminals, and the gain parameters include a reception channel gain and a detection channel gain;

[0158] constructing an optimization target based on the gain parameters; the optimization target includes a concealment target corresponding to the detection channel gain and a reliability target corresponding to the reception channel gain; the concealment target represents the total detection power of the reconnaissance satellite detecting the uplink access signals of each user terminal accessing the communication satellite, and the reliability target represents the signal to interference plus noise ratio of the uplink access signal of the target user terminal accessing the communication satellite; the target user terminal is the user terminal with the maximum transmission power of the uplink access signal;

[0159] constructing an objective function with the main target of minimizing the concealment target and the secondary target of maximizing the reliability target;

[0160] solving the optimal solution of the objective function, and optimizing the uplink access signals of the user terminals according to the optimal solution; the optimal solution corresponds to the allocation strategy of the transmission power of the uplink access signals of each user terminal.

[0161] In yet another aspect, the present application also provides a non-transitory computer readable storage medium, which stores a computer program, and the computer program is executed by a processor to implement the steps of the single time slot access optimization method provided by the above-mentioned methods, for example, including:

[0162] obtaining gain parameters of each user terminal to be accessed to the communication satellite; the user terminals comprise a plurality, and the gain parameters comprise a receiving channel gain and a reconnaissance channel gain;

[0163] constructing an optimization target based on the gain parameters; the optimization target comprises a concealment target corresponding to the reconnaissance channel gain and a reliability target corresponding to the receiving channel gain; the concealment target represents total reconnaissance power of an uplink access signal of each user terminal to be accessed to the communication satellite by a reconnaissance satellite, and the reliability target represents a signal-to-interference-plus-noise ratio of an uplink access signal of a target user terminal to be accessed to the communication satellite; the target user terminal is a user terminal with the largest transmitting power of the uplink access signal;

[0164] constructing an objective function with a main target of minimizing the concealment target and a secondary target of maximizing the reliability target;

[0165] solving an optimal solution of the objective function, and optimizing the uplink access signal of the user terminal according to the optimal solution; the optimal solution corresponds to a distribution strategy of the transmitting power of the uplink access signal of each user terminal.

[0166] The apparatus embodiments described above are merely illustrative, wherein the units shown as separate components can or can not be physically separate, and the components shown as units can or can not be physical units, i.e., can be located in one place, or can be distributed on multiple network units. Part or all of the modules can be selected according to actual needs to achieve the purpose of the embodiments. Those skilled in the art can understand and implement without creative labor.

[0167] From the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be realized by means of software plus a necessary general hardware platform, and of course can also be realized by hardware. Based on such understanding, the above technical solutions can be embodied in the form of a software product, which can be stored in a computer readable storage medium, such as a ROM / RAM, a magnetic disk, an optical disk, etc., and includes a plurality of instructions to make a computer device (which can be a personal computer, a server, or a network device, etc.) execute the methods described in each embodiment or some parts of the embodiments.

[0168] It should be pointed out finally that the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit the same; and although the present application has been described in detail with reference to the foregoing embodiments, it should be appreciated by those skilled in the art that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features thereof can be replaced equivalently; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A single-timeslot access optimization method, characterized in that, The method comprises the following steps: obtaining gain parameters of each user terminal to be accessed to a communication satellite; the user terminals comprise a plurality of user terminals, and the gain parameters comprise a receiving channel gain and a detection channel gain; constructing an optimization target based on the gain parameters; the optimization target comprises a concealment target corresponding to the detection channel gain and a reliability target corresponding to the receiving channel gain; the concealment target represents total detection power of an uplink access signal of each user terminal accessed to the communication satellite by a reconnaissance satellite, and the reliability target represents a signal-to-interference-plus-noise ratio of an uplink access signal of a target user terminal accessed to the communication satellite; the target user terminal is a user terminal with the maximum transmitting power of the uplink access signal; constructing an objective function with the main target of minimizing the concealment target and the secondary target of maximizing the reliability target; solving an optimal solution of the objective function, and optimizing the uplink access signal of the user terminal according to the optimal solution; the optimal solution corresponds to a distribution strategy of the transmitting power of the uplink access signal of each user terminal.

2. The single-slot access optimization method of claim 1, wherein, The step of constructing the optimization target based on the gain parameters comprises the following steps: taking the transmitting power of the uplink access signal of each user terminal as a decision variable, and performing weighted summation on the decision variable corresponding to each user terminal by using the detection channel gain to obtain the concealment target; calculating the signal-to-interference-plus-noise ratio of the decision variable of the target user terminal based on the receiving channel gain to obtain the reliability target.

3. The single timeslot access optimization method of claim 2, wherein, The step of calculating the signal-to-interference-plus-noise ratio of the decision variable of the target user terminal based on the receiving channel gain to obtain the reliability target comprises the following steps: performing weighting on the decision variable of the target user terminal by using the receiving channel gain of the target user terminal to obtain access power of the target user terminal; performing weighted summation on the decision variable of each first user terminal by using the receiving channel gain of each first user terminal to obtain total access power of each first user terminal; the first user terminal is a user terminal other than the target user terminal among the user terminals; obtaining receiver noise power of the communication satellite, and calculating a sum of the receiver noise power and the total access power to obtain total interference signal power; calculating the signal-to-interference-plus-noise ratio of the target user terminal based on the access power and the total interference signal power to obtain the reliability target; the signal-to-interference-plus-noise ratio is a ratio of the access power to the total interference signal power.

4. The single-slot access optimization method of claim 1, wherein, The step of solving the optimal solution of the objective function comprises the following steps: constructing a first constraint condition based on a power range of the transmitting power of the uplink access signal of each user terminal and a receiving power threshold of the uplink access signal; Under the constraint of the first constraint condition, the target function is solved by using The Pareto optimal solution of the target function is solved by using the constraint method.

5. The single timeslot access optimization method of claim 4, wherein, The first constraint condition is adopted under the constraint of The method for solving the Pareto optimal solution of the objective function includes: taking a preset threshold parameter of the signal-to-interference-plus-noise ratio as a constraint parameter, and converting the secondary target of the objective function into a second constraint condition based on the constraint parameter; solving a Pareto optimal solution of the main target under the constraints of the first constraint condition and the second constraint condition.

6. The single timeslot access optimization method of claim 5, wherein, The solving the Pareto optimal solution of the main target under the constraints of the first constraint condition and the second constraint condition comprises: initializing a minimum signal-to-interference-plus-noise ratio and an optimal signal-to-interference-plus-noise ratio, initializing the transmission power of the uplink access signal of each user terminal under the constraint of the first constraint condition; determining the maximum transmission power in each user terminal, and calculating the difference between the maximum signal-to-interference-plus-noise ratio of the target user terminal corresponding to the maximum transmission power and the minimum signal-to-interference-plus-noise ratio; in the case that the difference is greater than a preset convergence tolerance, calculating the average of the maximum signal-to-interference-plus-noise ratio and the minimum signal-to-interference-plus-noise ratio, and taking the average as the parameter value of the constraint parameter, and solving the feasible solution of the main target under the constraint of the second constraint condition; if the main target has a feasible solution, updating the minimum signal-to-interference-plus-noise ratio and the optimal signal-to-interference-plus-noise ratio based on the average; if the main target has no feasible solution, updating the maximum signal-to-interference-plus-noise ratio based on the average; returning to and performing the step of determining the maximum transmission power in each user terminal, and calculating the difference between the maximum signal-to-interference-plus-noise ratio of the target user terminal corresponding to the maximum transmission power and the minimum signal-to-interference-plus-noise ratio until the difference is less than or equal to the preset convergence tolerance, and determining the Pareto optimal solution of the main target according to the feasible solution.

7. A single-timeslot access optimization device, characterized in that, comprise: a parameter acquisition module, configured to acquire gain parameters of each user terminal to be accessed to a communication satellite; the user terminals comprise a plurality of user terminals, and the gain parameters comprise a receiving channel gain and a detection channel gain; a target construction module, configured to construct an optimization target based on the gain parameters; the optimization target comprises a concealment target corresponding to the detection channel gain and a reliability target corresponding to the receiving channel gain; the concealment target represents the total detection power of an uplink access signal of each user terminal accessed to the communication satellite by a detection satellite, and the reliability target represents a signal-to-interference-plus-noise ratio of an uplink access signal of a target user terminal accessed to the communication satellite; the target user terminal is a user terminal with the maximum transmission power of the uplink access signal; a function construction module, configured to construct a target function with the minimum concealment target as a main target and the maximum reliability target as a secondary target; a function solving module, configured to solve an optimal solution of the target function, and to optimize the uplink access signal of the user terminal according to the optimal solution; the optimal solution corresponds to a distribution strategy of the transmission power of the uplink access signal of each user terminal.

8. An electronic device comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, characterized in that, The processor executes the computer program to implement the single-time-slot access optimization method in any one of claims 1 to 6. 9.A non-transitory computer-readable storage medium having stored thereon a computer program, characterized in that, The computer program is executed by the processor to implement the single-time-slot access optimization method in any one of claims 1 to 6.

10. A computer program product comprising a computer program, characterized in that, The computer program is executed by the processor to implement the single-time-slot access optimization method in any one of claims 1 to 6.

Images