CN117749256B - Method and system for balancing load route among low-rail satellites - Google Patents
Method and system for balancing load route among low-rail satellites Download PDFInfo
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Abstract
The invention belongs to the field of low-orbit satellite communication, in particular relates to a method and a system for balancing load routes among low-orbit satellites, and aims to solve the problem that the stability and reliability of communication are reduced due to the fact that the traditional low-orbit satellite network is difficult to cope with unbalanced load caused by channel condition change and the like in the low-orbit satellite communication network. The invention comprises the following steps: acquiring historical jump connection data of a low-orbit satellite and a current low-orbit satellite communication data value; performing predictive calculation on historical jump data of the low-orbit satellite to obtain the low-orbit satellite to be in jump connection next time and a first route; calculating a predicted communication bearing value according to the low-orbit satellite and the route to be connected in a jump mode next time through a bearing value prediction method; and comparing the predicted communication bearing value with the current low-orbit satellite communication data value, and gradually adding the number of routes if the predicted communication bearing value is different from the current low-orbit satellite communication data value until the predicted communication bearing comprehensive value is the same as the current low-orbit satellite communication data value, so as to balance the load routes among the low-orbit satellites.
Description
Technical Field
The invention belongs to the field of low-orbit satellite communication, and particularly relates to a method and a system for balancing load routes among low-orbit satellites.
Background
With the rapid development of the mobile internet, the requirements of the user terminal on high-speed reliable and seamless coverage communication services are increasingly strong, the global seamless coverage is explicitly pointed out in the 6G general prospect and the potential key technology white paper, the general intelligent human society is constructed, the ground communication network and the satellite communication network are mutually complemented, and the air-day-sea-ground integrated network which spans regions, airspace and sea areas is constructed, so that the real global seamless coverage is realized. The low orbit satellite has short transmission delay and small path loss, and a constellation formed by a plurality of satellites can realize real global coverage. Thus, low-orbit satellites can provide fast and low-latency internet access services worldwide. The on-board routing technology is a key technology of satellite communication under a new 5G/6G infrastructure, and the performance of real-time transmission of data in a satellite network can be optimized by utilizing an inter-satellite routing algorithm, so that the high-efficiency transmission of the data is ensured.
LEO satellites always move at a high speed on a specific height of orbit, so that the topology structure of a low-orbit satellite network is changed at a high speed, inter-satellite links are frequently disconnected and reconnected, routing calculation is more dynamic and complex, routing table updating is more frequent, resources on the low-orbit satellite are limited, on-satellite calculation capability is weak, all routing data in a large scale cannot be stored, shortest path first (OSPF) algorithm, routing Information Protocol (RIP) algorithm and the like in a ground network cannot be used, but a routing technology is a key technology of a satellite network with on-satellite processing capability, is a core technology for solving the problem of carrying data information of the satellite network, is a key for ensuring smooth operation of various services of the satellite network, and directly influences various performances of the low-orbit satellite network. And the application of the 5G network aims at solving the explosive growth of mobile data and efficiently utilizing satellite resources. With the development of differentiation of satellite network service types, satellite network scene applications are gradually diversified, dependence of human production activities on a satellite communication network is gradually enhanced, and the problems of serious imbalance of ground user demands and on-board traffic distribution often occur.
In the prior art, the conventional low-orbit satellite network is difficult to cope with the problem of unbalanced load caused by channel condition change and the like in the low-orbit satellite communication network, so that the stability and reliability of communication are reduced.
Disclosure of Invention
In order to solve the above-mentioned problems in the prior art, that is, the problem that the conventional low-orbit satellite network is difficult to cope with the load imbalance caused by the channel condition change and the like in the low-orbit satellite communication network, so that the stability and reliability of the communication are reduced, the invention provides a method for balancing the load route between the low-orbit satellites, which comprises the following steps:
Step S100, acquiring low-orbit satellite historical jump connection data and a current low-orbit satellite communication data value;
The low-orbit satellite historical jump connection data comprises: low orbit satellite historical hop data and historical routing data;
step S200, predicting and calculating historical jump data of the low-orbit satellite to obtain the low-orbit satellite and a first route to be in jump connection next time;
Step S300, calculating a predicted communication bearing value of a first route according to a low-orbit satellite to be in jump connection with the first route at the next time through a bearing value prediction method;
Step S400, comparing the predicted communication bearing value with the current low-orbit satellite communication data value, and when the predicted communication bearing value is different from the current low-orbit satellite communication data value, selecting a second route of the low-orbit satellite to be connected in a jumping manner next time, and calculating the predicted communication bearing value of the second route; if the predicted communication bearing value is the same as the current low-orbit satellite communication data value, balancing the load route among the low-orbit satellites is completed;
Step S500, comparing the predicted communication bearing value of the second route with the current low-orbit satellite communication data value, if the predicted communication bearing value of the second route is different, selecting any route which is not selected as the second route as a third route, and returning to the step S400 until the predicted communication bearing value of other routes is the same as the current low-orbit satellite communication data value;
step S600, when all the predicted communication bearing values of the third route are smaller than the current low-orbit satellite communication data value, selecting a plurality of routes to calculate a predicted communication bearing comprehensive value;
And step S700, comparing the predicted communication bearing comprehensive value with the current low-orbit satellite communication data value, and if the predicted communication bearing comprehensive value is different from the current low-orbit satellite communication data value, repeating the step S600 until the predicted communication bearing comprehensive value is the same as the current low-orbit satellite communication data value, and balancing the load route among the low-orbit satellites.
Further, the calculation method of the predicted communication bearer value includes:
Wherein, Representing predicted traffic bearer values,/>Representing routing network topology values,/>Representing a route transmission delay value,/>Representing a routing network load value,/>Representation/>Weight value of/>Representation/>Weight value of/>Representation ofWeight value of/>Is a natural constant.
The predicted communication bearer value is a predicted communication bearer value for calculating each route, that is, a bearer capability, where the predicted communication bearer integrated value is a plurality of routes selected when no bearer capability is available to carry the current low-orbit satellite communication data value, and calculating the bearer capability integrated values of the routes until the plurality of routes of the bearer capability integrated value are found.
Further, the calculation method of the routing network topology value comprises the following steps:
Acquiring physical three-dimensional coordinates of two ends of a route;
Performing topology calculation according to physical three-dimensional coordinates of two ends of a route to obtain a route network topology value, wherein the calculation formula is as follows:
；
wherein the physical three-dimensional coordinates of the two ends of the route comprise a first physical three-dimensional coordinate And second physical three-dimensional coordinates/>。
The calculation of the topology value of the routing network can reflect the actual physical distance between satellites more truly by considering the physical three-dimensional coordinates, which helps to avoid the problem of neglecting the actual spatial distance by considering only the logical topology, and considering the physical coordinates helps to avoid the dead angle problem of the topology, even if there is a connection between two nodes logically, if their actual physical distance is far, the communication may be subject to a larger delay or instability, and considering the physical distance helps the system to select a more optimal communication path. In satellite communication, the transmission time of signals is affected by the physical distance, so that the transmission delay can be reduced and the communication efficiency can be improved by selecting a short-distance route, if the topological structure of a satellite network changes, for example, the relative position between satellites changes, the changes can be reflected in time by dynamically updating the physical coordinates, and the instantaneity of the routing network can be maintained.
Further, the method for calculating the routing transmission delay value comprises the following steps:
acquiring physical three-dimensional coordinates of two ends of a route, signal propagation speed, length of a queued data packet, transmission rate of the queue, time for processing the data packet and rate for processing the data at two ends of the route;
according to the physical three-dimensional coordinates of two ends of the route, the signal propagation speed, the length of the queued data packet, the transmission rate of the queue, the time used for processing the data packet and the rate of processing the data of two ends of the route, the route transmission delay value is obtained through comprehensive calculation, and the calculation method comprises the following steps:
；
Wherein, Representing the signal propagation velocity,/>Representing the signal propagation loss factor,/>Representing the length of queued packets,/>Representing the transmission rate of the queue,/>Representing the time taken to process a data packet,/>Indicating the rate at which data is processed at both ends of the route.
Further, the signal propagation loss factor calculating method includes:
acquiring a signal propagation actual speed set of the route and a signal propagation expected speed set of the route;
removing the maximum value, the minimum value and the abnormal value in the actual signal propagation speed set of the route and the expected signal propagation speed set of the route to obtain a preprocessed actual signal propagation speed set and an expected signal propagation speed set of the preprocessed route;
And carrying out loss calculation on the actual speed set of the preprocessed signal, the expected speed set of the preprocessed signal and the expected speed of the signal to be preprocessed, so as to obtain the signal propagation loss factor.
Further, the loss calculation specifically includes:
Wherein, Represents the/>Actual speed of signal propagation for secondary routes,/>，/>Representing the total number of signal propagation actual speeds of the acquired routes,/>Indicating the expected speed of signal propagation for the route.
The logic for calculating the route transmission delay value is as follows: the method comprises the steps of firstly calculating a routing distance based on physical three-dimensional coordinates of two ends of a route, dividing the routing distance by a signal propagation speed to obtain a propagation delay, then calculating a queuing delay based on the length of a queued data packet and the transmission rate of the queue, then calculating a processing delay based on the time used for processing the data packet and the rate of processing the data of the two ends of the route, finally adding the propagation delay, the queuing delay and the processing delay to obtain a routing transmission delay value, wherein a plurality of factors such as the propagation delay, the queuing delay and the processing delay are considered by calculation logic, so that the routing transmission delay value more comprehensively reflects each delay influence in the whole transmission process, the performance of the route is better accurately evaluated, the routing delay is calculated based on the physical three-dimensional coordinates, and the influence of the physical distance and the signal propagation speed on the delay is comprehensively considered.
Further, the step S600 specifically includes:
acquiring predicted communication bearing values of other routes;
randomly selecting predicted communication bearing values of two routes and distributing weight values;
calculating a plurality of predicted communication bearing comprehensive values of the two routes according to the predicted communication bearing values of the two routes and the distribution weight values;
comparing the two-route prediction communication bearing comprehensive values with the current low-orbit satellite communication data value respectively;
if the predicted communication bearing comprehensive values of the two routes are smaller than the current low-orbit satellite communication data value, randomly selecting predicted communication bearing values of three routes, and distributing weight values;
calculating a plurality of three-route predictive communication bearing comprehensive values according to the predictive communication bearing values of the three routes and the assigned weight values;
comparing the plurality of three-route prediction communication bearing comprehensive values with the current low-orbit satellite communication data value respectively;
If the predicted communication bearing comprehensive values of the three routes are smaller than the current low-orbit satellite communication data value, the number of routes is increased continuously, and the steps of randomly selecting routes, distributing weight values and calculating the predicted communication bearing comprehensive values are repeated until a plurality of routes of which the predicted communication bearing comprehensive values accord with the current low-orbit satellite communication data value are obtained.
Further, the calculation method of the two-route prediction communication bearer integrated value comprises the following steps:
；
Wherein, Representing two-route predictive communication bearer integrated value,/>Predictive traffic bearing value representing first randomly selected two routes,/>Predictive traffic bearing value representing a second randomly selected two routes,/>Weight value representing predicted traffic bearing value of first randomly selected two routes,/>Weight value representing predicted traffic bearing value of second randomly selected two routes,/>Is a natural constant.
In another aspect of the present invention, a system for balancing load routes between low-rail satellites is provided, comprising: the system comprises a data acquisition subsystem, a prediction calculation subsystem, a communication bearing value calculation subsystem, a communication bearing comprehensive value calculation subsystem, a central control platform, an alarm subsystem and an emergency processing subsystem;
The data acquisition subsystem is used for acquiring the low-orbit satellite historical jump connection data and the current low-orbit satellite communication data value;
The prediction calculation subsystem is used for performing prediction calculation on the historical jump data of the low-orbit satellite to obtain the low-orbit satellite to be in jump connection with the first route next time;
The communication bearing value calculating subsystem is used for calculating a predicted communication bearing value of the first route through a bearing value predicting method according to the low-orbit satellite to be connected in a jumping mode and the first route;
The communication bearing comprehensive value calculation subsystem is used for comparing the predicted communication bearing value of each route with the current low-orbit satellite communication data value, and if the predicted communication bearing value of each route is smaller than the current low-orbit satellite communication data value, selecting a plurality of routes and calculating the predicted communication bearing comprehensive value;
the central control platform is used for controlling the operation of the whole system and coordinating the work among all subsystems;
The alarm subsystem is used for detecting abnormal conditions, feeding abnormal information back to the central control platform when the abnormal conditions occur, and sending an alarm and a notification to related staff, wherein the abnormal conditions are as follows: the predicted communication bearing value is larger than a set threshold value;
The emergency treatment subsystem is used for receiving the abnormal information sent by the central control platform and taking emergency measures at the same time, and the emergency measures are as follows: automatically switch to the standby route and limit the connection access of the new route at the same time.
Further, the communication bearer value calculation subsystem includes: a routing network topology value calculation module, a routing transmission delay value calculation module and a signal propagation loss factor calculation module;
The route network topology value calculation module is used for obtaining physical three-dimensional coordinates of two ends of a route, reading the physical coordinates of the two ends of the route and calculating to obtain a route network topology value;
the route transmission delay value calculation module is used for obtaining parameters such as physical three-dimensional coordinates of two ends of a route, signal propagation speed, length of queued data packets and the like, and carrying out comprehensive calculation to obtain a route transmission delay value;
the signal propagation loss factor calculation module is used for obtaining the actual signal propagation speed of the route and the expected signal propagation speed of the route for a plurality of times, and calculating the signal propagation loss factor based on the processed data.
The invention has the beneficial effects that:
(1) According to the method for balancing the load route between the satellites of the low-orbit satellites, the predicted communication bearing value and the comprehensive value are calculated by comprehensively considering a plurality of factors such as the topology value of the routing network, the route transmission delay value, the signal propagation loss factor and the like, and the system can evaluate the performances of different routes more comprehensively and accurately, so that the accuracy of route selection is improved, and the selected routes can be ensured to better meet the requirements of the current low-orbit satellite communication data values;
(2) According to the low-orbit satellite inter-satellite load route balancing method, a mechanism of introducing weight, randomness and dynamically increasing the number of route strips is adopted, the system shows certain flexibility and adaptability, the importance of different performance factors can be adjusted according to actual requirements by introducing the weight, and the adaptability of the system to different communication scenes is improved by increasing the number of route strips randomly and dynamically, so that the system balances and optimizes communication loads better in a complex satellite communication environment;
(3) According to the system for the low-orbit satellite inter-satellite load route balancing method, by introducing a plurality of calculation modules, the system can comprehensively consider the performances of different aspects such as a topological structure, transmission delay, signal propagation loss and the like of a satellite communication route. The method is beneficial to the system to evaluate the communication bearing capacity of the satellite communication route more comprehensively and accurately, so that the optimization of global performance is realized;
(4) According to the system of the low orbit satellite inter-satellite load route balancing method, a communication bearing value calculating subsystem is decomposed into a plurality of subsystems such as a data acquisition subsystem, a prediction calculating subsystem, a communication bearing value calculating subsystem and a communication bearing comprehensive value calculating subsystem, and a plurality of calculating modules such as a routing network topology value calculating module, a routing transmission delay value calculating module and a signal propagation loss factor calculating module are introduced into the communication bearing value calculating subsystem, so that a modularized design is realized. The design improves the readability, maintainability and flexibility of the system, so that each module can be independently adjusted and customized to adapt to different communication scenes and requirements.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the detailed description of non-limiting embodiments, made with reference to the accompanying drawings in which:
FIG. 1 is a flow chart of a low-rail inter-satellite load route balancing method of the invention;
FIG. 2 is a flowchart showing steps for calculating a topology value of a routing network in a load route balancing method between low-orbit satellites;
FIG. 3 is a flowchart showing the steps of calculating a routing transmission delay value in a low-orbit inter-satellite load route balancing method according to the present invention;
FIG. 4 is a flowchart showing steps for calculating a signal propagation loss factor in a low-orbit satellite-to-satellite load route balancing method according to the present invention;
FIG. 5 is a flowchart showing the steps for calculating the predicted communication bearer combination value in a low-rail inter-satellite load route balancing method according to the present invention;
FIG. 6 is a system block diagram of a low-rail inter-satellite load route balancing system of the present invention;
fig. 7 is a communication bearer value calculation subsystem in a system of a low-rail inter-satellite load route balancing method according to the present invention.
Detailed Description
The application is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the application and are not limiting of the application. It should be noted that, for convenience of description, only the portions related to the present application are shown in the drawings.
It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The application will be described in detail below with reference to the drawings in connection with embodiments.
The invention provides a method for balancing load routes among low-orbit satellites, which comprises the following steps:
Step S100, acquiring low-orbit satellite historical jump connection data and a current low-orbit satellite communication data value;
The low-orbit satellite historical jump connection data comprises: low orbit satellite historical hop data and historical routing data;
Step S200, predicting and calculating historical jump data of the low-orbit satellite to obtain the low-orbit satellite and a first route to be in jump connection next time; the first route represents a route corresponding to the low-orbit satellite which is connected to the next low-orbit satellite to be connected in a jumping way;
Step S300, calculating a predicted communication bearing value of a first route according to a low-orbit satellite to be in jump connection with the first route at the next time through a bearing value prediction method;
Step S400, comparing the predicted communication bearing value with the current low-orbit satellite communication data value, and selecting a first route as a load route when the predicted communication bearing value is the same as the current low-orbit satellite communication data value, so as to complete the balance of the load routes among the low-orbit satellites; when the predicted communication bearing value is different from the current low-orbit satellite communication data value, selecting another route of the low-orbit satellite to be connected in a jumping manner next time as a second route, and calculating the predicted communication bearing value of the second route; if the predicted communication bearing value of the second route is the same as the current low-orbit satellite communication data value, balancing the load route among the low-orbit satellites is completed;
Step S500, comparing the predicted communication bearing value of the second route with the current low-orbit satellite communication data value, if the predicted communication bearing value of the second route is different, selecting any route which is not selected as the second route as a third route, and returning to the step S400 until the predicted communication bearing value of other routes is the same as the current low-orbit satellite communication data value;
step S600, when all the predicted communication bearing values of the third route are smaller than the current low-orbit satellite communication data value, selecting a plurality of routes to calculate a predicted communication bearing comprehensive value;
And step S700, comparing the predicted communication bearing comprehensive value with the current low-orbit satellite communication data value, and if the predicted communication bearing comprehensive value is different from the current low-orbit satellite communication data value, repeating the step S600 until the predicted communication bearing comprehensive value is the same as the current low-orbit satellite communication data value, and balancing the load route among the low-orbit satellites.
In order to more clearly describe a method for balancing load routes between low-rail satellites of the present invention, the following description will discuss each step in the embodiment of the present invention with reference to fig. 1.
The method for balancing the load route among the low-orbit satellites in the first embodiment of the invention comprises the following steps of:
Step S100, acquiring low-orbit satellite historical jump connection data and a current low-orbit satellite communication data value;
The low-orbit satellite historical jump connection data comprises: low orbit satellite historical hop data and historical routing data;
the low-orbit satellite historical jump connection data is the track rule of the low-orbit satellite and the route of the historical jump connection;
Step S200, predicting and calculating historical jump data of the low-orbit satellite to obtain the low-orbit satellite and a first route to be in jump connection next time; the first route represents a route corresponding to the low-orbit satellite which is connected to the next low-orbit satellite to be connected in a jumping way;
In this embodiment, the prediction calculation specifically includes:
Analyzing historical hop data, identifying hop patterns and rules among low-orbit satellites, analyzing historical route selection data to know which routes the system is more prone to select under different conditions, and predicting future hop trends by using an autoregressive comprehensive moving average model based on the result of data analysis;
In this embodiment, the predicting the future jump trend by using the autoregressive integrated moving average model specifically includes:
Acquiring historical low-orbit satellite jump connection data, ensuring that the data has a certain time sequence, preprocessing the data, including processing missing values, outliers and stability test, judging whether the data is stable or not, namely, the mean value and the variance are constant, if the data is not stable, carrying out differential processing, namely, determining the number of times of differential so as to ensure that the data is stable, and if the data is not stable, determining parameters of an ARIMA model: autoregressive order, moving average order, which is determined by observing an autocorrelation function diagram or a partial autocorrelation function diagram.
The autocorrelation function represents the correlation moving average order of the time sequence and the time sequence on different hysteresis orders, the correlation moving average order is determined by observing an autocorrelation function diagram or a partial autocorrelation function diagram, the moving average function represents the correlation of the time sequence and the error of the hysteresis value, the determined autoregressive order and the moving average order are used for fitting an ARIMA model, the model is diagnosed, whether the residual sequence is white noise is checked, if the residual sequence is not white noise, model parameters are required to be adjusted, future jump transfer toward potential prediction is carried out by using the already-fitted ARIMA model, and the prediction result is evaluated through a root mean square error performance index.
Step S300, calculating a predicted communication bearing value of a first route according to a low-orbit satellite to be in jump connection with the first route at the next time through a bearing value prediction method;
in this embodiment, the predicted communication bearer value specifically includes:
Because the predicted communication bearing value of the route is mainly influenced by three influencing factors, namely a route network topology value, a route transmission delay value and a route network load value, summation is firstly carried out on the three influencing factors to obtain a summation value, then the summation value is respectively carried out on the three influencing factors and the summation value, the ratio result is used as a weight value of each of the three calculating factors, then the three calculating factors are respectively multiplied with the weight value of each of the calculating factors and then the summation calculation is carried out, and a natural constant is brought in the equation, the effect is to introduce an attenuation factor into a model, so that the far influence cannot have excessively obvious influence on the prediction,
In this embodiment, the method for calculating the predicted communication bearer value includes:
；
Wherein, Representing predicted traffic bearer values,/>Representing routing network topology values,/>Representing a route transmission delay value,/>Representing a routing network load value,/>Representation/>Weight value of/>Representation/>Weight value of/>Representation ofWeight value of/>Is a natural constant.
In this embodiment, by considering the network topology, transmission delay and load conditions, the performances of different routes are comprehensively evaluated, so that the predicted communication bearing value more fully reflects the condition of the overall communication load, rather than just relying on a single factor, the different factors are weighted by using the weighting value, the influence degree of each factor is allowed to be adjusted according to specific requirements and priorities by the system, the flexibility enables the system to adapt to different communication scenes and requirements, and the weighted summation mode enables the system to adapt to the change of the network conditions. By dynamically adjusting the weight values, the system can flexibly cope with the communication load change in different time periods or under specific events, the adaptability of the system is improved, and the weighted summation taking multiple factors into consideration is beneficial to improving the accuracy of the communication load condition. Such logic is more reflective of actual network operating conditions, thereby enabling more reasonable and accurate routing choices, and thus better balancing and optimizing communication loads in complex satellite communication environments.
In this embodiment, the calculation method of the routing network topology value, as shown in fig. 2, includes:
Acquiring physical three-dimensional coordinates of two ends of a route;
Performing topology calculation according to physical three-dimensional coordinates of two ends of a route to obtain a route network topology value, wherein the calculation formula is as follows:
；
wherein the physical three-dimensional coordinates of the two ends of the route comprise a first physical three-dimensional coordinate And second physical three-dimensional coordinates/>。
In this embodiment, as shown in fig. 3, the calculation method of the routing transmission delay value includes:
acquiring physical three-dimensional coordinates of two ends of a route, signal propagation speed, length of a queued data packet, transmission rate of the queue, time for processing the data packet and rate for processing the data at two ends of the route;
according to the physical three-dimensional coordinates of two ends of the route, the signal propagation speed, the length of the queued data packet, the transmission rate of the queue, the time used for processing the data packet and the rate of processing the data of two ends of the route, the route transmission delay value is obtained through comprehensive calculation, and the calculation method comprises the following steps:
Accurately acquiring physical three-dimensional coordinates of two ends of a route by using a GPS receiver, calculating propagation time of signals by measuring time of laser pulses to obtain propagation speed, capturing and analyzing network data packets by using a Wireshark to obtain length of queued data packets and transmission rate of the queue, and obtaining transmission time and route path of the data packets by using Ping and Traceroute tools; reading physical three-dimensional coordinates, signal propagation speed, length of queued data packets, transmission rate of queues, time for processing the data packets, and data processing rate at two ends of a route, and performing comprehensive calculation to obtain a route transmission delay value, wherein the signal propagation speed is a necessary factor for solving the route transmission delay value, and the length of the queued data packets is the waiting data packets: because the data packet transmission needs time, the data packet can not be directly transmitted at an instant, so that a waiting data packet exists, the length of the waiting data packet is the length of a queuing data packet, and the length of the queuing data packet is also a necessary factor for solving the routing transmission delay value;
；
Wherein, The signal propagation speed is represented as a necessary factor for solving the routing transmission delay value; /(I)Representing a signal propagation loss factor; /(I)Indicating the length of the queued data packets; /(I)Representing a transmission rate of the transmission queue; Representing the time taken to process the data packet; /(I) Representing the rate at which data is processed at both ends of the route;
The data packet is a transmission carrier in transmission, and the length of the queued data packet is the length of the data packet waiting in the uploading queue.
In this embodiment, as shown in fig. 4, the signal propagation loss factor is calculated by a method including:
acquiring a signal propagation actual speed set of the route and a signal propagation expected speed set of the route;
removing the maximum value, the minimum value and the abnormal value in the actual signal propagation speed set of the route and the expected signal propagation speed set of the route to obtain a preprocessed actual signal propagation speed set and an expected signal propagation speed set of the preprocessed route;
And carrying out loss calculation on the actual speed set of the preprocessed signal, the expected speed set of the preprocessed signal and the expected speed of the signal to be preprocessed, so as to obtain the signal propagation loss factor.
In this embodiment, the loss calculation specifically includes:
；
Wherein, Represents the/>Actual speed of signal propagation for secondary routes,/>，/>Representing the total number of signal propagation actual speeds of the acquired routes,/>Indicating the expected speed of signal propagation for the route.
Step S400, comparing the predicted communication bearing value with the current low-orbit satellite communication data value, and selecting a first route as a load route when the predicted communication bearing value is the same as the current low-orbit satellite communication data value, so as to complete the balance of the load routes among the low-orbit satellites; when the predicted communication bearing value is different from the current low-orbit satellite communication data value, selecting another route of the low-orbit satellite to be connected in a jumping manner next time as a second route, and calculating the predicted communication bearing value of the second route; if the predicted communication bearing value of the second route is the same as the current low-orbit satellite communication data value, balancing the load route among the low-orbit satellites is completed;
Step S500, comparing the predicted communication bearing value of the second route with the current low-orbit satellite communication data value, if the predicted communication bearing value of the second route is different, selecting any route which is not selected as the second route as a third route, and returning to the step S400 until the predicted communication bearing value of other routes is the same as the current low-orbit satellite communication data value;
step S600, when all the predicted communication bearing values of the third route are smaller than the current low-orbit satellite communication data value, selecting a plurality of routes to calculate a predicted communication bearing comprehensive value;
In this embodiment, the step S600, as shown in fig. 5, specifically includes:
acquiring predicted communication bearing values of other routes;
randomly selecting predicted communication bearing values of two routes and distributing weight values;
calculating a plurality of predicted communication bearing comprehensive values of the two routes according to the predicted communication bearing values of the two routes and the distribution weight values;
comparing the two-route prediction communication bearing comprehensive values with the current low-orbit satellite communication data value respectively;
if the predicted communication bearing comprehensive values of the two routes are smaller than the current low-orbit satellite communication data value, randomly selecting predicted communication bearing values of three routes, and distributing weight values;
calculating a plurality of three-route predictive communication bearing comprehensive values according to the predictive communication bearing values of the three routes and the assigned weight values;
comparing the plurality of three-route prediction communication bearing comprehensive values with the current low-orbit satellite communication data value respectively;
If the predicted communication bearing comprehensive values of the three routes are smaller than the current low-orbit satellite communication data value, the number of routes is increased continuously, and the steps of randomly selecting routes, distributing weight values and calculating the predicted communication bearing comprehensive values are repeated until a plurality of routes of which the predicted communication bearing comprehensive values accord with the current low-orbit satellite communication data value are obtained.
In this embodiment, the calculation method of the two-route prediction communication bearer integrated value includes:
；
Wherein, Representing two-route predictive communication bearer integrated value,/>Predictive traffic bearing value representing first randomly selected two routes,/>Predictive traffic bearing value representing a second randomly selected two routes,/>Weight value representing predicted traffic bearing value of first randomly selected two routes,/>Weight value representing predicted traffic bearing value of second randomly selected two routes,/>Is a natural constant.
And step S700, comparing the predicted communication bearing comprehensive value with the current low-orbit satellite communication data value, and if the predicted communication bearing comprehensive value is different from the current low-orbit satellite communication data value, repeating the step S600 until the predicted communication bearing comprehensive value is the same as the current low-orbit satellite communication data value, and balancing the load route among the low-orbit satellites.
Although the steps are described in the above-described sequential order in the above-described embodiments, it will be appreciated by those skilled in the art that in order to achieve the effects of the present embodiments, the steps need not be performed in such order, and may be performed simultaneously (in parallel) or in reverse order, and such simple variations are within the scope of the present invention.
The system of the load route balancing method between low-orbit satellites in the second embodiment of the invention comprises a data acquisition subsystem, a prediction calculation subsystem, a communication bearing value calculation subsystem, a communication bearing comprehensive value calculation subsystem, a central control platform, an alarm subsystem and an emergency treatment subsystem as shown in fig. 6;
the data acquisition subsystem is used for acquiring the low-orbit satellite historical jump connection data and the current low-orbit satellite communication data value;
the prediction calculation subsystem is used for performing prediction calculation based on the historical jump data of the low-orbit satellite to obtain the low-orbit satellite to be jumped and connected next time and a route;
The communication bearing value calculating subsystem is used for reading the low-orbit satellite and the route to be connected in a jumping way next time and calculating a predicted communication bearing value;
The communication bearing comprehensive value calculation subsystem is used for comparing the predicted communication bearing value of each route with the current low-orbit satellite communication data value, and if the predicted communication bearing value of each route is smaller than the current low-orbit satellite communication data value, selecting a plurality of routes and calculating the predicted communication bearing comprehensive value;
the central control platform is used for controlling the operation of the whole system and coordinating the work among all subsystems;
The alarm subsystem is used for detecting abnormal conditions, feeding abnormal information back to the central control platform when the abnormal conditions occur, and sending an alarm and a notification to related staff, wherein the abnormal conditions are as follows: the predicted communication bearing value is larger than a set threshold value;
The emergency treatment subsystem is used for receiving the abnormal information sent by the central control platform and taking emergency measures at the same time, and the emergency measures are as follows: automatically switch to the standby route and limit the connection access of the new route at the same time.
In this embodiment, the communication bearer value calculating subsystem includes a routing network topology value calculating module, a routing transmission delay value calculating module, and a signal propagation loss factor calculating module as shown in fig. 7;
The route network topology value calculation module is used for obtaining physical three-dimensional coordinates of two ends of a route, reading the physical coordinates of the two ends of the route and calculating to obtain a route network topology value;
the route transmission delay value calculation module is used for obtaining parameters such as physical three-dimensional coordinates of two ends of a route, signal propagation speed, length of queued data packets and the like, and carrying out comprehensive calculation to obtain a route transmission delay value;
the signal propagation loss factor calculation module is used for obtaining the actual signal propagation speed of the route and the expected signal propagation speed of the route for a plurality of times, and calculating the signal propagation loss factor based on the processed data.
In this embodiment, by introducing multiple computing modules, the system can comprehensively consider different aspects of performance of the route, including topology, transmission delay and signal propagation loss, which is helpful for more comprehensively and accurately evaluating the communication bearing capacity of the route, decompose the computing task into different modules, which is helpful for modular design and maintenance of the system, each module focuses on a specific computing task, improving the readability and maintainability of codes, different modules can be customized and adjusted according to specific requirements, so that the system has more flexibility and adaptability, for example, under the condition that the topology needs to be emphasized, the weights of the computing modules of the network topology can be adjusted, each module is responsible for different computing tasks, possibly generating some intermediate results, which can be reused by other modules, avoiding repeated computation, improving the computing efficiency, further expanding the system according to requirements, for example, adding other computing modules to consider more performance indexes or factors, such as expansibility that the system has more future development potential, the signal propagation loss factor computing modules can be customized and adjusted according to specific requirements, for example, the actual signal propagation speed can be more accurately optimized by the computing modules, the overall performance of the system can be more accurately optimized, the overall performance of the system can be better optimized, the overall performance of the system can be satisfied, and the communication can reasonably estimate the actual performance by considering the actual signal propagation speed.
It will be clear to those skilled in the art that, for convenience and brevity of description, the specific working process of the system described above and the related description may refer to the corresponding process in the foregoing method embodiment, which is not repeated here.
It should be noted that, in the system for balancing load routes between low-rail satellites provided in the above embodiment, only the division of the above functional modules is used as an example, in practical application, the above functional allocation may be performed by different functional modules according to needs, that is, the modules or steps in the embodiment of the present invention are further decomposed or combined, for example, the modules in the embodiment may be combined into one module, or may be further split into a plurality of sub-modules, so as to complete all or part of the functions described above. The names of the modules and steps related to the embodiments of the present invention are merely for distinguishing the respective modules or steps, and are not to be construed as unduly limiting the present invention.
The terms "first," "second," and the like, are used for distinguishing between similar objects and not for describing a particular sequential or chronological order.
The terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus/apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus/apparatus.
Thus far, the technical solution of the present invention has been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of protection of the present invention is not limited to these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present invention, and such modifications and substitutions will be within the scope of the present invention.
Claims (4)
1. A method of low-rail inter-satellite load route balancing, the method comprising:
Step S100, acquiring low-orbit satellite historical jump connection data and a current low-orbit satellite communication data value;
The low-orbit satellite historical jump connection data comprises: low orbit satellite historical hop data and historical routing data;
Step S200, predicting and calculating historical jump data of the low-orbit satellite to obtain the low-orbit satellite and a first route to be in jump connection next time; the first route represents a route corresponding to a low-orbit satellite to be connected to a next low-orbit satellite to be connected in a jumping manner;
step S300, calculating a predicted communication bearing value of the first route according to the low-orbit satellite to be connected in a jumping manner and the first route in the next time through a bearing value prediction method;
the calculation method of the predicted communication bearing value comprises the following steps:
；
Wherein, Representing predicted traffic bearer values,/>Representing routing network topology values,/>Representing a route transmission delay value,/>Representing a routing network load value,/>Representation/>Weight value of/>Representation/>Weight value of/>Representation ofWeight value of/>Is a natural constant;
The calculation method of the routing network topology value comprises the following steps:
Acquiring physical three-dimensional coordinates of two ends of a route;
Performing topology calculation according to physical three-dimensional coordinates of two ends of a route to obtain a route network topology value, wherein the calculation formula is as follows:
；
wherein the physical three-dimensional coordinates of the two ends of the route comprise a first physical three-dimensional coordinate And second physical three-dimensional coordinates/>；
The calculation method of the routing transmission delay value comprises the following steps:
acquiring physical three-dimensional coordinates of two ends of a route, signal propagation speed, length of a queued data packet, transmission rate of the queue, time for processing the data packet and rate for processing the data at two ends of the route;
according to the physical three-dimensional coordinates of two ends of the route, the signal propagation speed, the length of the queued data packet, the transmission rate of the queue, the time used for processing the data packet and the rate of processing the data of two ends of the route, the route transmission delay value is obtained through comprehensive calculation, and the calculation method comprises the following steps:
；
Wherein, Representing the signal propagation velocity,/>Representing the signal propagation loss factor,/>Representing the length of queued packets,/>Representing the transmission rate of a transmission queue,/>Representing the time taken to process a data packet,/>Representing the rate at which data is processed at both ends of the route;
The data packet is a transmission carrier in transmission, and the length of the queued data packet is the length of the data packet waiting in a transmission queue;
the signal propagation loss factor comprises the following calculation method:
acquiring a signal propagation actual speed set of the route and a signal propagation expected speed set of the route;
removing the maximum value, the minimum value and the abnormal value in the actual signal propagation speed set of the route and the expected signal propagation speed set of the route to obtain a preprocessed actual signal propagation speed set and an expected signal propagation speed set of the preprocessed route;
performing loss calculation on the actual speed set of the preprocessed signal, the expected speed set of the preprocessed signal and the expected speed of the signal to be preprocessed, so as to obtain a signal propagation loss factor;
the loss calculation method comprises the following steps:
；
Wherein, Represents the/>Actual speed of signal propagation for secondary routes,/>，/>Representing the total number of signal propagation actual speeds of the acquired routes,/>A signal propagation expected speed representative of the route;
Step S400, comparing the predicted communication bearing value with the current low-orbit satellite communication data value, and selecting a first route as a load route when the predicted communication bearing value is the same as the current low-orbit satellite communication data value, so as to complete the balance of the load routes among the low-orbit satellites; when the predicted communication bearing value is different from the current low-orbit satellite communication data value, selecting another route of the low-orbit satellite to be connected in a jumping manner next time as a second route, and calculating the predicted communication bearing value of the second route; if the predicted communication bearing value of the second route is the same as the current low-orbit satellite communication data value, balancing the load route among the low-orbit satellites is completed;
Step S500, comparing the predicted communication bearing value of the second route with the current low-orbit satellite communication data value, if the predicted communication bearing value of the second route is different, selecting any route which is not selected as the second route as a third route, and returning to the step S400 until the predicted communication bearing value of other routes is the same as the current low-orbit satellite communication data value;
step S600, when all the predicted communication bearing values of the third route are smaller than the current low-orbit satellite communication data value, selecting a plurality of routes to calculate a predicted communication bearing comprehensive value;
the step S600 specifically includes:
acquiring predicted communication bearing values of other routes;
randomly selecting predicted communication bearing values of two routes and distributing weight values;
calculating a plurality of predicted communication bearing comprehensive values of the two routes according to the predicted communication bearing values of the two routes and the distribution weight values;
the plurality is represented as a set of any two routes taken within the route range;
comparing the two-route prediction communication bearing comprehensive values with the current low-orbit satellite communication data value respectively;
if the predicted communication bearing comprehensive values of the two routes are smaller than the current low-orbit satellite communication data value, randomly selecting predicted communication bearing values of three routes, and distributing weight values;
calculating a plurality of three-route predictive communication bearing comprehensive values according to the predictive communication bearing values of the three routes and the assigned weight values;
comparing the plurality of three-route prediction communication bearing comprehensive values with the current low-orbit satellite communication data value respectively;
If the predicted communication bearing comprehensive values of the three routes are smaller than the current low-orbit satellite communication data value, continuing to increase the number of routes, and repeating the steps of randomly selecting routes, distributing weight values and calculating the predicted communication bearing comprehensive values until a plurality of routes of which the predicted communication bearing comprehensive values accord with the current low-orbit satellite communication data value are obtained;
And step S700, comparing the predicted communication bearing comprehensive value with the current low-orbit satellite communication data value, and if the predicted communication bearing comprehensive value is different from the current low-orbit satellite communication data value, repeating the step S600 until the predicted communication bearing comprehensive value is the same as the current low-orbit satellite communication data value, and balancing the load route among the low-orbit satellites.
2. The method for balancing load routes among low-orbit satellites according to claim 1, wherein the calculation method for predicting the communication bearer integrated value by two routes comprises the following steps:
；
Wherein, Representing two-route predictive communication bearer integrated value,/>Predictive traffic bearing value representing first randomly selected two routes,/>Predictive traffic bearing value representing a second randomly selected two routes,/>Weight value representing predicted traffic bearing value of first randomly selected two routes,/>Weight value representing predicted traffic bearing value of second randomly selected two routes,/>Is a natural constant.
3. A system employing a method of low-rail inter-satellite load route equalization as claimed in any one of claims 1-2, comprising: the system comprises a data acquisition subsystem, a prediction calculation subsystem, a communication bearing value calculation subsystem, a communication bearing comprehensive value calculation subsystem, a central control platform, an alarm subsystem and an emergency processing subsystem;
The data acquisition subsystem is used for acquiring the low-orbit satellite historical jump connection data and the current low-orbit satellite communication data value;
The prediction calculation subsystem is used for performing prediction calculation on the historical jump data of the low-orbit satellite to obtain the low-orbit satellite to be in jump connection with the first route next time;
The communication bearing value calculating subsystem is used for calculating a predicted communication bearing value of the first route through a bearing value predicting method according to the low-orbit satellite to be connected in a jumping mode and the first route;
The communication bearing comprehensive value calculation subsystem is used for comparing the predicted communication bearing value of each route with the current low-orbit satellite communication data value, and if the predicted communication bearing value of each route is smaller than the current low-orbit satellite communication data value, selecting a plurality of routes and calculating the predicted communication bearing comprehensive value;
the central control platform is used for controlling the operation of the whole system and coordinating the work among all subsystems;
The alarm subsystem is used for detecting abnormal conditions, feeding abnormal information back to the central control platform when the abnormal conditions occur, and sending an alarm and a notification to related staff, wherein the abnormal conditions are as follows: the predicted communication bearing value is larger than a set threshold value;
The emergency treatment subsystem is used for receiving the abnormal information sent by the central control platform and taking emergency measures at the same time, and the emergency measures are as follows: automatically switch to the standby route and limit the connection access of the new route at the same time.
4. A system for a method of low-rail inter-satellite load route equalization as recited in claim 3, wherein said communication bearer value calculation subsystem comprises: the system comprises a routing network topology value calculation module, a routing transmission delay value calculation module and a signal propagation loss factor calculation module;
The route network topology value calculation module is used for obtaining physical three-dimensional coordinates of two ends of a route, reading the physical coordinates of the two ends of the route and calculating to obtain a route network topology value;
The route transmission delay value calculation module is used for obtaining physical three-dimensional coordinates of two ends of a route, signal propagation speed and length parameters of queued data packets, and carrying out comprehensive calculation to obtain a route transmission delay value;
the signal propagation loss factor calculation module is used for obtaining the actual signal propagation speed of the route and the expected signal propagation speed of the route for a plurality of times, and calculating the signal propagation loss factor based on the processed data.
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