CN116131918A

CN116131918A - Satellite wave beam switching method and device of airborne terminal and computing equipment

Info

Publication number: CN116131918A
Application number: CN202310111400.9A
Authority: CN
Inventors: 段世平; 房强; 范永顺; 王宇
Original assignee: Feitian United Beijing System Technology Co Ltd
Current assignee: Feitian United Beijing System Technology Co Ltd
Priority date: 2023-02-03
Filing date: 2023-02-03
Publication date: 2023-05-16

Abstract

The embodiment of the application relates to the technical field of satellite communication, and relates to a satellite wave beam switching method, device and computing equipment of an airborne terminal. The scheme of the method is as follows: constructing a flight track model, a satellite coverage model, a user demand model and a satellite beam model corresponding to a designated voyage; the satellite beam model includes handoff boundaries for satellite beams; acquiring segmented voyages divided according to beam switching points according to a satellite beam switching boundary and a flight trajectory model, wherein each segmented voyage corresponds to at least one selectable beam; calculating all executable beam switching strategies according to the segmentation voyage and the corresponding selectable beams; the beam switching strategy comprises designating each beam switching point in the voyage and correspondingly switching selectable beams; and selecting the beam switching strategy to be implemented from all the executable beam switching strategies according to the satellite coverage model and the user demand model. The embodiment of the application can provide the optimal beam switching strategy and provide unobstructed network service for the airborne terminal.

Description

Satellite wave beam switching method and device of airborne terminal and computing equipment

Technical Field

The present invention relates to the field of satellite communications technologies, and in particular, to a method, an apparatus, and a computing device for switching satellite beams of an airborne terminal.

Background

With the development of multimode antenna technology, the current antenna terminal can support satellite access in multiple frequency bands and can switch in an actual satellite network environment. For supporting switching between different satellites in multiple frequency bands, such as switching logic between KA satellites or KU satellites, since two satellites are not in the same background, the current practice is to preset the switching logic according to the beam coverage map of the satellite operator. And acquiring the range of all the beam overlapping areas according to the beam coverage map, and triggering switching after judging that the aircraft enters the area.

The switching strategy in the prior art is passive, and under the preset switching logic, switching operation is performed as long as the aircraft calculates that the aircraft meets the switching conditions according to the existing network coverage and algorithm. And the network management, the network control and the gateway station under different satellites are independent. In addition, in the existing array antenna design, the coverage state of the B star network to be switched cannot be detected in real time when the A star is in the network state. Switching in a state where B star is unavailable or network load is high can cause switching failure or cause network quality to be affected. In addition, in the prior art, beam switching is independently performed, and because the flight route is unknown, when a plurality of available beams or available satellite networks are selected, the terminal cannot consider whether the switching is the optimal switching logic for the whole navigation section, so that smooth network service is difficult to provide for the airborne terminal in the whole navigation section, and the user experience is poor.

Disclosure of Invention

In view of the above problems in the prior art, embodiments of the present application provide a satellite beam switching method, device and computing device for an airborne terminal, which provide a full range optimal beam switching strategy based on different satellite network coverage and a known aircraft flight trajectory, and provide unobstructed network service for the airborne terminal in the whole range, thereby improving user experience.

To achieve the above object, a first aspect of the present application provides a satellite beam switching method of an airborne terminal, including:

constructing a flight track model, a satellite coverage model, a user demand model and a satellite beam model corresponding to a designated course; the satellite coverage model comprises satellite signal indexes corresponding to all positions in the appointed course, the user demand model comprises at least one user demand index in the appointed course, and the satellite beam model comprises a satellite beam switching boundary;

determining a beam switching point according to the switching boundary of the satellite beam and the flight trajectory model, and acquiring a segmented course divided according to the beam switching point in the designated course, wherein each segmented course corresponds to at least one selectable beam;

Calculating all executable beam switching strategies according to the segmentation voyage and the corresponding selectable beams; the beam switching strategy comprises each beam switching point in the appointed course and a corresponding switched selectable beam;

and selecting a beam switching strategy to be implemented from all the executable beam switching strategies according to the satellite coverage model and the user demand model.

As a possible implementation manner of the first aspect, the calculating all enforceable beam switching policies according to the segmentation voyage and the corresponding selectable beams includes:

and arranging and combining the selectable beams corresponding to each segmented course in the designated course to obtain all the executable beam switching strategies.

As a possible implementation manner of the first aspect, the selecting, according to the satellite coverage model and the user demand model, a beam switching policy to be implemented from all the implementable beam switching policies includes:

acquiring the total length of a beam coverage range of each executable beam switching strategy according to the satellite coverage model;

calculating the beam coverage rate of each executable beam switching strategy according to the total length of the beam coverage range;

And taking the beam switching strategy with the highest beam coverage rate of all the executable beam switching strategies as the beam switching strategy to be implemented.

As a possible implementation manner of the first aspect, the satellite signal indicator includes a bandwidth value of a satellite signal, and the method further includes:

acquiring bandwidth values of each subsection voyage in the appointed voyage according to the satellite coverage model;

calculating the maximum required bandwidth of the designated voyage according to the user requirement model;

calculating the wave beam switching times under all the wave beam switching strategies which can be implemented;

under the condition of more than two beam switching strategies with highest beam coverage, judging whether the bandwidth value of each subsection voyage in the beam switching strategy with the highest beam coverage is larger than or equal to the maximum required bandwidth;

and under the condition that the bandwidth value of each subsection voyage is larger than or equal to the maximum required bandwidth, taking the beam switching strategy with the minimum number of beam switching times in the beam switching strategy with the highest beam coverage as the beam switching strategy to be implemented.

As a possible implementation manner of the first aspect, the method further includes:

Calculating a bandwidth effective reference value of the appointed course according to the user demand model;

judging whether the bandwidth value of each segmented course in the beam switching strategy with the highest beam coverage rate is larger than or equal to the bandwidth effective reference value under the condition that the bandwidth value of at least one segmented course is smaller than the maximum required bandwidth;

under the condition that the bandwidth value of at least one subsection course is smaller than the bandwidth effective reference value, taking the beam switching strategy with the largest full course bandwidth in the beam switching strategies with the highest beam coverage as the beam switching strategy to be implemented; wherein the full range bandwidth is the sum of the bandwidth values of each segment range in the specified range.

acquiring user demand weights corresponding to the user demand indexes according to the user demand model;

calculating the evaluation values of all the executable beam switching strategies according to the user demand weight of at least one user demand index;

and under the condition that the bandwidth value of each subsection voyage is larger than or equal to the bandwidth effective reference value, taking the beam switching strategy with the largest evaluation value in the beam switching strategy with the highest beam coverage as the beam switching strategy to be implemented.

As a possible implementation manner of the first aspect, the user demand index includes at least one of full range bandwidth, satellite switching times, and beam switching times.

and under the condition that the preset switching condition is met, re-executing the steps of acquiring the segmented voyages divided according to the beam switching points in the designated voyages, calculating all the executable beam switching strategies and selecting the beam switching strategies to be implemented.

A second aspect of the present application provides a satellite beam switching device of an airborne terminal, including:

the construction unit is used for constructing a flight track model, a satellite coverage model, a user demand model and a satellite beam model which correspond to the designated range; the satellite coverage model comprises satellite signal indexes corresponding to all positions in the appointed course, the user demand model comprises at least one user demand index in the appointed course, and the satellite beam model comprises a satellite beam switching boundary;

the segmentation unit is used for determining a beam switching point according to the switching boundary of the satellite beam and the flight trajectory model, and acquiring segmentation voyages divided according to the beam switching point in the designated voyages, wherein each segmentation voyage corresponds to at least one selectable beam;

The calculation unit is used for calculating all the executable beam switching strategies according to the segmentation voyage and the corresponding optional beams; the beam switching strategy comprises each beam switching point in the appointed course and a corresponding switched selectable beam;

and the selection unit is used for selecting the beam switching strategy to be implemented from all the executable beam switching strategies according to the satellite coverage model and the user demand model.

As a possible implementation manner of the second aspect, the computing unit is configured to:

As a possible implementation manner of the second aspect, the selecting unit is configured to:

As a possible implementation manner of the second aspect, the satellite signal indicator includes a bandwidth value of a satellite signal, and the selecting unit is further configured to:

As a possible implementation manner of the second aspect, the selecting unit is further configured to:

As a possible implementation manner of the second aspect, the user demand index includes at least one of full range bandwidth, satellite switching times, and beam switching times.

As a possible implementation manner of the second aspect, the method further includes:

And re-executing the functions executed by the segmentation unit, the calculation unit and the selection unit when the preset switching condition is met.

A third aspect of the present application provides a computing device comprising:

a communication interface;

at least one processor coupled to the communication interface; and

at least one memory coupled to the processor and storing program instructions that, when executed by the at least one processor, cause the at least one processor to perform the method of any of the first aspects described above.

A fourth aspect of the present application provides a computer readable storage medium having stored thereon program instructions which, when executed by a computer, cause the computer to perform the method of any of the first aspects described above.

These and other aspects of the invention will be apparent from and elucidated with reference to the embodiment(s) described hereinafter.

Drawings

The various features of the invention and the connections between the various features are further described below with reference to the figures. The figures are exemplary, some features are not shown in actual scale, and some features that are conventional in the art to which this application pertains and are not essential to the application may be omitted from some figures, or features that are not essential to the application may be additionally shown, and combinations of the various features shown in the figures are not meant to limit the application. In addition, throughout the specification, the same reference numerals refer to the same. The specific drawings are as follows:

Fig. 1 is a schematic diagram of a beam switching technique in the prior art;

fig. 2 is a schematic diagram of an embodiment of a satellite beam switching method of an on-board terminal according to an embodiment of the present application;

fig. 3 is a schematic diagram of an embodiment of a satellite beam switching method of an on-board terminal according to an embodiment of the present application;

fig. 4 is a schematic diagram of an embodiment of a satellite beam switching method of an on-board terminal according to an embodiment of the present application;

fig. 5 is a schematic diagram of an embodiment of a satellite beam switching method of an on-board terminal according to an embodiment of the present application;

fig. 6 is a schematic diagram of an embodiment of a satellite beam switching method of an on-board terminal according to an embodiment of the present application;

fig. 7 is a flowchart of an embodiment of a satellite beam switching method of an on-board terminal according to an embodiment of the present application;

fig. 8 is a schematic view of a beam model of an embodiment of a satellite beam switching method of an on-board terminal according to an embodiment of the present application;

fig. 9 is a schematic switching flow chart of an embodiment of a satellite beam switching method of an airborne terminal according to an embodiment of the present application;

fig. 10 is a schematic diagram of switching times of an embodiment of a satellite beam switching method of an airborne terminal according to an embodiment of the present application;

Fig. 11 is a schematic diagram of a switching logic of an embodiment of a satellite beam switching method of an on-board terminal according to an embodiment of the present application;

fig. 12 is a schematic diagram of an embodiment of a satellite beam switching device of an on-board terminal according to an embodiment of the present application;

fig. 13 is a schematic diagram of a computing device provided in an embodiment of the present application.

Detailed Description

The terms first, second, third, etc. or module a, module B, module C, etc. in the description and in the claims, etc. are used solely for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order, as may be appreciated, if permitted, to interchange particular orders or precedence orders to enable embodiments of the present application described herein to be implemented in orders other than those illustrated or described herein.

In the following description, reference numerals indicating steps such as S110, S120, … …, etc. do not necessarily indicate that the steps are performed in this order, and the order of the steps may be interchanged or performed simultaneously as allowed.

The term "comprising" as used in the description and claims should not be interpreted as being limited to what is listed thereafter; it does not exclude other elements or steps. Thus, it should be interpreted as specifying the presence of the stated features, integers, steps or components as referred to, but does not preclude the presence or addition of one or more other features, integers, steps or components, or groups thereof. Thus, the expression "a device comprising means a and B" should not be limited to a device consisting of only components a and B.

Reference in the specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the invention. Thus, appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment, but may. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments as would be apparent to one of ordinary skill in the art from this disclosure.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. If there is a discrepancy, the meaning described in the present specification or the meaning obtained from the content described in the present specification is used. In addition, the terminology used herein is for the purpose of describing embodiments of the present application only and is not intended to be limiting of the present application. For the purpose of accurately describing the technical content of the present application, and for the purpose of accurately understanding the present invention, the terms used in the present specification are given the following explanation or definition before the explanation of the specific embodiments:

1) EIRP value (Equivalent Isotropically Radiated Power, equivalent omni-directional radiated power): EIRP, which generally refers to the equivalent omni-directional radiated power, or effective omni-directional radiated power, is a common concept in the field of radio communications. It refers to the radiated power of the satellite or ground station in a given direction, ideally equal to the gain of the transmit power antenna of the power amplifier.

2) G/T value: G/T is an important technical indicator of antennas. G represents the antenna gain and T represents the antenna noise temperature. The larger the G/T value, the better the performance of the ground station receiving system. The ground station with G/T more than or equal to 35dB/K is defined as a type A standard station; the station with G/T more than or equal to 31.7dB/K is defined as a B-type standard station; others are non-standard stations.

3) SNR (SIGNAL-NOISE RATIO): also known as signal to noise ratio. Refers to the ratio of signal to noise in an electronic device or electronic system. The signals here refer to the electronic signals from outside the device that need to be processed by the device; noise refers to an irregular additional signal (or information) that is not present in the original signal generated after passing through the apparatus, and such signal does not vary with the variation of the original signal.

The prior art method is described first, and then the technical scheme of the application is described in detail.

In the current satellite communication technology context, on the one hand, the commercial operation mode of satellite bandwidth is that users pay according to traffic. On the other hand, the multimode array antenna technology supports the access of high-flux satellites in different frequency bands, but only supports the access of one satellite at the same time, and the access of different satellites can be realized through switching. As satellite terminals continue to increase, as well as terminal density increases, beam loading increases. In this context, user demand and user experience are central to technical demands. The construction of a satellite and beam switching logic which can meet the user requirements and improve the user experience is a problem to be solved at present.

Fig. 1 is a schematic diagram of a beam switching technique in the prior art. As shown in fig. 1, first, in the same satellite system, the sizes and dimensions of the different beams are not uniform. And the G/T value and EIRP value are different for different beams. The responses are in the model that the size of the beams is different. The model of beam coverage and size may be entered at system construction. Each beam pattern is actually a polygon composed of a plurality of coordinate points. The boundary of the polygon is the switching boundary. Typically, a portion of the coordinate points of the handover boundary are stored at the terminal and more coordinate points of the handover boundary are stored at the master station.

Referring to fig. 1, two circles in the figure are the beam equivalent circular boundaries. The two beam crossing portions are switchable regions. When the aircraft terminal performs the beam switching of the same satellite, the terminal interacts with the network control and the network management of the satellite background in real time when the terminal is in the coverage area of the beam 1. The terminal firstly decides whether to switch according to the locally stored coordinate points, and then sends a switching request to the master station. The master station judges whether the terminal accords with the switching condition according to the information of the terminal and the coordinate point, and gives a decision whether to switch according to the load condition of the request switching wave beam.

With the development of multimode antenna technology, the current antenna terminal can support satellite access in multiple frequency bands and can switch in an actual satellite network environment. For supporting switching between different satellites in multiple frequency bands, such as switching logic between KA satellites or KU satellites, since two satellites are not in the same background, the current practice is to preset the switching logic according to the beam coverage map of the satellite operator. And acquiring the range of all the beam overlapping areas according to the beam coverage map, and triggering switching after judging that the aircraft enters the area. Referring to fig. 1, the implementation method technically is as follows: in fig. 1, it is assumed that beam 1 is a beam of a KA satellite and beam 2 is a KU satellite beam. When the plane flies in the beam 1, the coordinates of the beam intersection points A and B are calculated, and the common chord is calculated. And then, calculating whether the intersection point exists between the flight track of the airplane and the public chord according to the information such as the direction speed of the flight and the like. If there is an intersection, the operation of switching beam 2 of satellite B is performed.

The switching strategy in the prior art is passive, and under the preset switching logic, switching operation is performed as long as the aircraft calculates that the aircraft meets the switching conditions according to the existing network coverage and algorithm. And the network management, the network control and the gateway station under different satellites are independent. In addition, in the existing array antenna design, the coverage state of the B star network to be switched cannot be detected in real time when the A star is in the network state. The star must be locked before the B star network state can be confirmed. Switching in a state where B star is unavailable or network load is high can cause switching failure or cause network quality to be affected. In summary, the switching conditions are only location information, the conditions are single, and the switching strategy is inflexible.

In addition, in the prior art, beam switching is independently performed, and because the flight route is unknown, when a plurality of available beams or available satellite networks are selected, the terminal cannot consider whether the present switching is the optimal switching logic for the whole air range. This problem may not be severe in a co-satellite handoff, but the handoff logic selection problem is particularly important for handoff between satellites of different frequency bands with overlapping coverage. Each time beam switching is performed independently, the switching logic is not optimized for the whole leg. When a plurality of available beams or available satellite networks are selected, the support of a bottom driving strategy is lacked, smooth network service is difficult to provide for the airborne terminal in the whole voyage, and the user experience is poor.

Furthermore, the prior art has the problem of beam coverage accuracy. In the prior art, boundaries are all based on beam modeling coordinate points at the initial stage of system construction, but actual accuracy has deviation. For example, the error of the beam boundary in the air of 1 KM height is about 18KM calculated according to the geostationary satellite orbit 35000KM and the attitude accuracy of 0.03 °. There may be a switching time delay of 70 seconds for an aircraft at 900km speed. In addition, the satellite (such as KA) in the high frequency band has poor capability of bypassing the obstacle due to high frequency and short wavelength, and is obviously affected by weather such as cloud layer, rainfall, haze and the like. The actual signal quality under different climatic conditions is not the same, and the optimal switching point is also affected to some extent.

The prior art has the following defects: because the flight route is unknown, when a plurality of available beams or available satellite networks are selected, the terminal cannot consider whether the switching is the optimal switching logic for the whole navigation section, so that smooth network service is difficult to provide for the airborne terminal in the whole navigation path, and the user experience is poor.

Based on the technical problems in the prior art, the application provides a satellite wave beam switching method, device, equipment and medium of an airborne terminal, which give out an optimal wave beam switching strategy of a whole range based on different satellite network coverage and known aircraft flight tracks, and provide unobstructed network service for the airborne terminal in the whole range, so that user experience is improved, and the technical problem that whether the current switching is optimal switching logic for the whole range or not can not be considered by the terminal when a plurality of available wave beams or available satellite networks are selected in the prior art is solved. In addition, by creating the satellite coverage model, the embodiment of the application can acquire satellite signal indexes corresponding to each position in the designated voyage, thereby solving the technical problems that the satellite network coverage state and the beam coverage precision to be switched cannot be detected in real time, the switching failure is caused or the network quality is affected in the prior art.

Fig. 2 is a schematic diagram of an embodiment of a satellite beam switching method of an on-board terminal according to an embodiment of the present application. As shown in fig. 2, the method specifically may include:

step S110, constructing a flight path model, a satellite coverage model, a user demand model and a satellite beam model corresponding to a specified range; the satellite coverage model comprises satellite signal indexes corresponding to all positions in the appointed course, the user demand model comprises at least one user demand index in the appointed course, and the satellite beam model comprises a satellite beam switching boundary;

step S120, determining a beam switching point according to the switching boundary of the satellite beam and the flight trajectory model, and acquiring a segmented course divided according to the beam switching point in the specified course, wherein each segmented course corresponds to at least one selectable beam;

step S130, calculating all the executable beam switching strategies according to the segmentation voyage and the corresponding optional beams; the beam switching strategy comprises each beam switching point in the appointed course and a corresponding switched selectable beam;

and step S140, selecting a beam switching strategy to be implemented from all the executable beam switching strategies according to the satellite coverage model and the user demand model.

First, the embodiment of the application provides an integrated system built on multiple terminals, multiple satellites and multiple channels. And referring to the thought of big data, a plurality of terminals are accessed into a unified ground center, and the problem of switching among different satellites is comprehensively solved from a higher dimension.

Through the establishment of the ground data center, a plurality of airborne satellite terminals can be simultaneously accessed. The flight data can be synchronized to the ground in real time, so that the sharing of different satellite network data of different terminals and different channels is realized. The shared data includes: the wave beam at the satellite side covers boundary point information and load information of the wave beam; real-time terminal track, network information, real-time bandwidth and other information at the terminal side. In addition, the ground center can also acquire the information of the known navigation channel of the civil aviation, and a set of flight trajectory model diagram is established for the acquisition and optimization of the flight trajectory data of different types of the same navigation line. The data collected by the ground center can be used for modeling to provide a data basis for the beam switching strategy.

In step S110, based on the data acquired by the ground data center, a corresponding flight trajectory model, satellite coverage model, user demand model, and satellite beam model may be constructed for the specified voyage. Wherein specifying the leg may include specifying an entire leg of the flight. Each model constructed was as follows:

1) The flight path model comprises route information, and specifically can comprise an airplane flight path formed by a channel center line and position coordinates of key points on the flight path.

2) The satellite coverage model comprises satellite signal indexes corresponding to various positions in a designated voyage, such as satellite signal EIRP values, corresponding longitude and latitude coordinate points, a bandwidth coordinate graph and the like.

3) The user demand model includes at least one user demand indicator in a specified voyage, such as a bandwidth value of the user demand, a number of user-requested switches, and so forth.

4) The satellite beam model includes coverage areas, handoff boundaries, etc. of individual satellite beams that cover a given range.

In order to solve the problem of beam switching between different satellites, in step S120, a complete flight trajectory curve of an aircraft in a specified voyage is obtained according to a flight trajectory model; and obtaining the switching boundary of each satellite beam according to the satellite beam model. The intersection point of the switching boundary of each satellite wave beam and the flight track curve is the wave beam switching point. The whole designated voyage can be divided into a plurality of segmented voyages according to the beam switching points. Each segment voyage has at least one selectable beam for providing network services to the terminal. For example, the entire designated leg AD is divided into a segment leg AB, a segment leg BC, and a segment leg CD. The segment course AB corresponds to the selectable beam 1, the segment course BC corresponds to the selectable beam 1 and the selectable beam 2, and the segment course CD corresponds to the selectable beam 2 and the selectable beam 3.

In step S130, all the applicable beam switching strategies are calculated according to each segment course and the corresponding selectable beam in the whole designated course. The beam switching strategy comprises each beam switching point in the designated voyage and a corresponding switched selectable beam. For example, in the above example, all the beam switching strategies that can be implemented include a permutation and combination of the following:

1) Using the selectable beam 1 at the segment voyage AB;

2) Using either selectable beam 1 or selectable beam 2 at segment voyage BC;

3) The alternate beam 2 or alternate beam 3 is used at the segment voyage CD.

In step S140, satellite signal indexes corresponding to each segment course in the designated course are obtained according to the satellite coverage model, for example, bandwidth values of each segment course are obtained; and obtaining the bandwidth value required by the user, the switching times required by the user and the like according to the user requirement model. And then selecting the beam switching strategy to be implemented from all the executable beam switching strategies according to the satellite coverage model and the user demand model. For example, all the executable beam switching strategies are compared according to the satellite coverage model, and the optimal beam switching strategy is selected as the beam switching strategy to be implemented. If more than two optimal beam switching strategies exist, the beam switching strategy to be implemented can be selected from the more than two optimal beam switching strategies by combining with a user demand model.

As described in the embodiments, the embodiments of the present application finally implement that the airborne terminal gives a full range optimal switching point decision that meets the QoS (Quality of Service ) requirement based on different satellite network coverage and the known flight trajectory of the aircraft, and dynamically adjusts the logic of the optimal switching point through the conditions of real-time update of the satellite network coverage, satellite network quality (load), and the like. According to the embodiment of the application, the full range optimal beam switching strategy is given based on the flight track model, the satellite coverage model, the user demand model and the satellite beam model, smooth network service is provided for the airborne terminal in the whole range, and user experience is improved.

Referring again to fig. 2, in one embodiment, step S130 in fig. 2, the calculating all applicable beam switching strategies according to the segmentation voyage and the corresponding selectable beams includes:

For example, in the above example, all the beam switching strategies that can be implemented include the following:

1) Optional beam 1 is used at segment pass AB, optional beam 1 is used at segment pass BC, and optional beam 2 is used at segment pass CD. No beam switching is performed at point B and the alternative beam 1 is switched to alternative beam 2 at point C.

2) Optional beam 1 is used at segment pass AB, optional beam 1 is used at segment pass BC, and optional beam 3 is used at segment pass CD. No beam switching is performed at point B and the alternative beam 1 is switched to the alternative beam 3 at point C.

3) Optional beam 1 is used at segment pass AB, optional beam 2 is used at segment pass BC, and optional beam 2 is used at segment pass CD. At point B, the beam is switched from the alternative beam 1 to the alternative beam 2, and at point C, no beam switching is performed.

4) Optional beam 1 is used at segment pass AB, optional beam 2 is used at segment pass BC, and optional beam 3 is used at segment pass CD. At point B, the alternate beam 1 is switched to alternate beam 2, and at point C, the alternate beam 2 is switched to alternate beam 3.

Referring to fig. 2 and 3, in an embodiment, in step S140 in fig. 2, the selecting, according to the satellite coverage model and the user demand model, a beam switching policy to be implemented from the all the implementable beam switching policies includes:

step S210, acquiring the total length of beam coverage ranges of each executable beam switching strategy according to the satellite coverage model;

step S220, calculating the beam coverage rate of each executable beam switching strategy according to the total length of the beam coverage range;

Step S230, taking the beam switching strategy with the highest beam coverage rate of the all the executable beam switching strategies as the beam switching strategy to be implemented.

Whether each subsection range of the whole range has beam coverage or not can be obtained from the satellite coverage model, and the total length of the beam coverage range of each executable beam switching strategy can be calculated. The ratio of the total length of the beam coverage range to the length of the whole range is the beam coverage. For example, if there is beam coverage throughout the range, the beam coverage is 100%. Among all the executable beam switching strategies, the beam switching strategy with the highest beam coverage rate is selected, so that smooth network service can be ensured to be provided.

Referring to fig. 4, in one embodiment, the satellite signal index includes a bandwidth value of a satellite signal, and the method further includes:

step S310, obtaining the bandwidth value of each subsection course in the appointed course according to the satellite coverage model;

step S320, calculating the maximum required bandwidth of the designated voyage according to the user requirement model;

step S330, calculating the wave beam switching times under all the wave beam switching strategies which can be implemented;

Step S340, judging whether the bandwidth value of each subsection voyage in the beam switching strategy with the highest beam coverage is larger than or equal to the maximum required bandwidth under the condition that more than two beam switching strategies with the highest beam coverage are provided;

and step S350, when the bandwidth value of each segment voyage is larger than or equal to the maximum required bandwidth, taking the beam switching strategy with the least number of beam switching times in the beam switching strategy with the highest beam coverage as the beam switching strategy to be implemented.

In the flow of fig. 3, if there are multiple beam switching strategies with highest beam coverage, the optimal switching strategy may be further selected from the beam switching strategies with highest beam coverage. In the flow of fig. 4, the value of the maximum required bandwidth may be obtained from the user requirement model. And judging whether the bandwidth value of each subsection voyage of the beam switching strategy with the highest beam coverage rate can meet the requirement of the maximum required bandwidth. And if the beam switching strategies with the highest beam coverage rate can meet the requirements, selecting the beam switching strategy with the least number of times from the beam switching strategies as the optimal switching strategy.

Referring to fig. 5, in one embodiment, the method further comprises:

step S410, calculating a bandwidth effective reference value (BAND) of the designated voyage according to the user demand model;

step S420, judging whether the bandwidth value of each segment course in the beam switching strategy with the highest beam coverage is larger than or equal to the bandwidth effective reference value under the condition that the bandwidth value of at least one segment course is smaller than the maximum required bandwidth;

step S430, under the condition that the bandwidth value of at least one subsection course is smaller than the bandwidth effective reference value, the beam switching strategy with the highest full course bandwidth in the beam switching strategies with the highest beam coverage is used as the beam switching strategy to be implemented; wherein the full range bandwidth is the sum of the bandwidth values of each segment range in the specified range.

In the flow of fig. 4, if there are a plurality of beam switching strategies with highest beam coverage, and bandwidth values of each segment course of the beam switching strategies with highest beam coverage have at least one bandwidth requirement that cannot meet the maximum demand bandwidth, it is determined in the flow of fig. 5 whether the bandwidth values of each segment course of the beam switching strategies with highest beam coverage can meet the bandwidth effective reference value requirement. The bandwidth effective reference value BAND is a bandwidth value of a user demand estimated according to the actual service demand of an on-board internet user and calculated according to a user demand model. If the beam switching strategy with the highest beam coverage rate can not meet the requirement of the bandwidth effective reference value, the beam switching strategy with the highest beam coverage rate and the maximum full range bandwidth in the beam switching strategy is used as the optimal switching strategy, so that unobstructed network service is provided to the maximum extent.

Referring to fig. 6, in one embodiment, the method further comprises:

step S510, obtaining user demand weights corresponding to the user demand indexes according to the user demand model;

step S520, calculating the evaluation values of all the executable beam switching strategies according to the user demand weight of at least one user demand index;

and step S530, under the condition that the bandwidth value of each subsection voyage is larger than or equal to the bandwidth effective reference value, taking the beam switching strategy with the largest evaluation value in the beam switching strategy with the highest beam coverage as the beam switching strategy to be implemented.

In one embodiment, the user demand index includes at least one of full range bandwidth, number of satellite handovers, number of beam handovers.

In the flow of fig. 5, if there are multiple beam switching strategies with highest beam coverage, and the bandwidth values of each segment voyage of the multiple beam switching strategies with highest beam coverage can meet the requirement of the maximum required bandwidth, in the flow of fig. 6, the evaluation value of the multiple beam switching strategies with highest beam coverage is calculated according to the user requirement weight of at least one user requirement index. And taking the beam switching strategy with the largest evaluation value in the beam switching strategies as the optimal switching strategy. That is, under the condition that a plurality of switching strategies can meet the bandwidth requirement, the switching strategy with the highest user satisfaction degree is selected according to the personalized requirement of the user, so that the user experience is further improved.

Fig. 7 is a flowchart of an embodiment of a satellite beam switching method of an on-board terminal according to an embodiment of the present application. As shown in fig. 7, an exemplary satellite beam switching method may include the steps of:

step 101: creating a flight trajectory model

Firstly, route information is acquired from a third party database (civil aviation bureau), and an actual flight trajectory model is established according to different actual flight trajectories of each route.

Step 102: a satellite overlay model is created.

The current satellite coverage data is first acquired. After the ground data center collects the track data, satellite signal indexes corresponding to each position in a designated voyage, such as satellite signal EIRP values, corresponding longitude and latitude coordinate points, bandwidth coordinate diagrams and the like, can be given.

A satellite coverage model is created for each satellite based on the above data. After the satellite coverage pattern set-up for a plurality of satellites covering a given course is completed, the following

steps

103 and 104 are performed. In a subsequent step, an optimal beam switching strategy is selected based on the data of the satellite coverage model.

Step 103: user demand bandwidth guarantee model building algorithm

1) Obtaining flow plans from an operation policy

The flow plan may be obtained from a ground data center operations service interface. In one example, three packages are used as models:

Package A: experiencing traffic packets, speed limit X (bps);

package B: VIP traffic packet speed limit Y (bps);

and C, package: the whole process is not limited by the package, and the speed is limited by Z (bps).

2) The user model sources may include the following:

A. and the ticket purchase gives the passenger information of the satellite Internet package airline.

Wherein, purchase economy class give A package number: n1;

wherein, purchase business class give B the number of packages: n2;

wherein not all channel ticketing passengers are presented, so n1+n2< NM, NM represents the total number of flight passengers.

B. The actual number of passengers and the number of passengers accessing the cabin WiFi.

Wherein, the total number of flight passengers: NM;

wherein, actually insert passenger cabin wiFi headcount: w is a metal;

wherein, the number of people holding a package (purchase or gifting) in the access cabin W: w1.

C. The number of passengers actually buying (or free pickup) a traffic package.

All people holding packages: m;

b1, the number of package buyers M1;

b2 package purchasing number M2;

b3 Package purchasing number M3.

D. The number of passengers for the activated package.

Activating a package: s1, performing S1;

activate B package: s2, performing S2;

activating a C package: s3, performing S3.

3) Establishing a bandwidth model

3.1 Theoretical maximum required bandwidth TBmax calculation formula: NM x Z

Where NM represents the total number of people and Z represents the maximum speed limit.

The "maximum required bandwidth" in fig. 4 and 5 may employ the value of the theoretical maximum required bandwidth TBmax, and the bandwidth value of each segment voyage is compared with the value of TBmax to implement the logic of the preferred handoff strategy.

3.2 A calculation formula of the actual maximum required bandwidth ABmax:

(N1*X+N2*Y)+(X*M1+Y*M2+Z*M3)-(N1+N2+M1+M2+M3-M)*X+(W-W1)*Z

wherein, bandwidth given away: (N1 x+n2X Y);

wherein, the purchased bandwidth: (X m1+y m2+z M3);

wherein, repeatedly purchased packages: (n1+n2+m1+m2+m3-M) X;

wherein bandwidth access WiFi is not purchased by potential customers: (W-W1) Z;

wherein, after the ticket is presented, the two packages after the package is repeatedly purchased cannot be overlapped with bandwidth.

3.3 Real-time minimum guaranteed bandwidth ABmin calculation formula: x S1+ Y S2+ Z S3

The calculation formula represents the sum of the multiplication of the number of people activated by each package and the speed limit.

The bandwidth values calculated above can reflect the quantitative demands of users on network services, and are specifically as follows:

TBmax is mainly used to select satellite networks, which can typically provide higher bandwidths when the theoretical maximum bandwidth cannot be met. When the number of actual passengers is small, a network with low available bandwidth, high load and fewer switching times can be selected to ensure better user experience.

ABmax is the theoretical peak of all known users at present, including those holding traffic active, inactive, and using on-board networks, but not acquiring traffic packets.

ABmin is the total real-time bandwidth peak of the active user.

4) Outputting final bandwidth effective reference value BAND

The bandwidth value calculation formula of the user requirement referenced by the algorithm in the embodiment of the application is as follows:

band= [ abmin+ (ABmax-ABmin) ×conversion X ] ×multiplexing desired Y

Wherein the conversion calculation is approximately expressed as:

x = target switch beam on-line duration/total on-line duration.

The multiplexing expectation is a statistical value, and is based on the statistical average value of the relation between the actual service bandwidth and the speed-limiting bandwidth of the on-board internet user. Multiplexing desired Y can be expressed approximately as:

y=avg (data traffic x 8/on-line duration/speed limit value)

The "bandwidth efficient reference value" in fig. 5 and 6 may employ the value of BAND, and the bandwidth value of each segment leg is compared to the value of BAND to implement the logic of the preferred handoff strategy.

Step 104: switching logic preference

In one example, specific switching logic is illustrated in a switching scenario of a three-beam coverage model at a time.

1. The beam pattern is shown in fig. 8, wherein:

1) Beam A, B, C is a three repeated coverage beam.

2) A1, A2, B1, B2, C1, C2 are all intersections of the track with the beam range.

3) The black arrow is the trajectory of the aircraft.

4) When the aircraft flies from A1 to C2, wherein A1, B1 and C1 are available switching starting points, and A2, B2 and C2 are available switching ending points.

2. The switching flow is shown in fig. 9, and the steps are as follows:

01 The coordinates of the beam switching points A1, A2, B1, B2, C1, C2 are calculated from the coordinate system of the flight path (track). The beam switching point is the intersection of the switching boundary of the satellite beam with the flight trajectory.

02 According to the above 6 intersections, the flight trajectory is divided into 5 segmented legs. The segmentation ranges are A1B1, B1C1, C1A2, A2B2 and B2C2 respectively.

Wherein the number of available coverage beams for each segment voyage is:

a1b1=1, the available coverage beam is beam a;

b1c1=2, the available coverage beams are beam a and beam B;

c1a2=3, the available coverage beams are beam a, beam B, and beam C;

a2b2=2, the available coverage beams are beam B and beam C;

b2c2=1, the available coverage beam being beam C;

03 A total of 5 tracks of the entire voyage contains 1+2+3+2+1=9 different segmented voyages. The segmentation course is different from the selection of different beams, and is expressed as follows in the form of adding beam names:

A beam area: a (A1B1+B1C1+C1A2)

B beam area: b (B1C1+C1A2+A2B2)

C beam area: c (C1A2+A2B2+B2C2)

04 The signal quality of all 9-section voyages is assigned through the bandwidth through the acquired data of different satellites in the satellite coverage model. In one embodiment, the bandwidth value may be normalized and then assigned to the signal quality of all 9 legs.

05 According to the permutation and combination formula, the number of available coverage beams of the B1C1 section is 2, the number of available coverage beams of the C1A2 section is 3, the number of available coverage beams of the A2B2 section is 2, and the data of the optional beams of each subsection voyage are substituted into the permutation and combination formula, the total available switching logic number can be calculated as follows: 2×3×2=12. Various beam switching strategies that may be implemented are as follows:

A(A1B1+B1C1)+B(C1A2)+C(A2B2+B2C2)

A(A1B1)+B(B1C1)+A(C1A2)+B(A2B2)+C(B2C2)

A(A1B1+B1C1)+C(C1A2+A2B2+B2C2)

06 The total length of all coverage ranges (coverage beams greater than or equal to 1) under 12 logics is calculated and denoted by L1-L12, respectively.

The model in the above example is a complex handoff of multi-beam coverage, with at least 1 beam coverage for the entire track, so the total length under all logics is equal.

07 The number of switches under 12 kinds of logic is calculated and denoted by T1-T12, respectively.

As shown in fig. 10, under each logic, the switching between beams can be represented by vertical arrows in the diagram. The number of vertical arrows indicates the number of handovers.

08 Signal quality under 12 switching logics is calculated, denoted B1-B12.

The signal quality under 12 kinds of switching logic can be calculated according to the signal quality of 9-segment voyages in the step 04.

09 User expectations D may include requirements for signal quality and number of handovers.

In real operation, if it is desired to guarantee a higher bandwidth, it is necessary to constantly switch between different satellites and beams. The actual user experience is reduced due to network interruption caused by the handover, so that the number of handovers is small to meet the user's expectations.

10 The algorithm of optimal switching logic judgment is shown in fig. 11, and the steps are as follows:

step 1001: and acquiring the total length L of all 12 switching logics and coverage range, signal quality B, switching times T, theoretical maximum required bandwidth TBmax, bandwidth effective reference value BAND value and the requirement D of a user on bandwidth and switching times.

Step 1002: firstly, a switching strategy with highest range coverage rate is optimized according to the L1-L12 values.

In actual commercial airline demands, the total length of beam coverage is calculated throughout the voyage. And according to the total length L, taking the switching strategy corresponding to the longest one as the optimal strategy. That is, it is first necessary to ensure that the entire flight is covered by satellite beams, and therefore, it is necessary to select, as the beam switching strategy to be implemented, the beam switching strategy that has the longest total length of one beam coverage, that is, the highest beam coverage in the entire flight. Referring to fig. 11, if there is and only one of the beam switching strategies that has the highest beam coverage among all the applicable beam switching strategies, it is regarded as the optimal switching logic.

In the above example the entire track has at least 1 beam coverage, so the total length of beam coverage under all logics is equal. In case there are multiple handover strategies with highest beam coverage, it is also necessary to further select the optimal handover logic among these strategies. Referring to fig. 11, in this embodiment of the present application, the full range bandwidth B in the switching logic of the plurality of identical maximum values of L, that is, the signal quality in step 08, may be further calculated.

Step 1003: in a plurality of identical switching logics with maximum L values, the bandwidth value of each segment voyage is compared with a theoretical maximum required bandwidth TBmax. When the requirement of TBmax value can be met, namely the bandwidth value of each subsection voyage is larger than or equal to TBmax, the switching logic with the least switching times is selected from the switching logic with the same L value as the optimal logic.

Step 1004: if there is no switching logic that can meet the requirement of the TBmax value among the plurality of switching logics of the same maximum L value, that is, if the bandwidth value of at least one segment leg among the switching logics is smaller than TBmax, it is necessary to compare the bandwidth value of each segment leg with the bandwidth valid reference value BAND in this case. And in the beam switching strategy with the highest beam coverage rate, under the condition that the bandwidth value of at least one subsection range is smaller than BAND, selecting the beam switching strategy with the largest full range bandwidth from the beam switching strategies to be selected as the optimal logic. In this case, the maximum bandwidth access is selected for prioritizing the minimum bandwidth requirements of the guaranteed users.

Step 1005: if there is no switching logic capable of meeting the requirement of the TBmax value in the switching logic with the same maximum L value, and the bandwidth value of each subsection voyage is calculated to be equal to or greater than the bandwidth effective reference value BAND, the optimal switching logic can be selected by a weighting method. The formula for weighting and quantizing is as follows:

y=bandwidth x D1-number of satellite switches x D2-number of beam switches x D3

Wherein D1 is the user's desire for bandwidth; d2 and D3 are user requirements for the number of switching times. The D1 value becomes large when the user demands a higher bandwidth; when a user selects only one satellite, the D2 value becomes large; d3 becomes larger when the user has a higher demand for network interruption.

And calculating the evaluation value Y of the switching logic of a plurality of identical maximum L values according to the user demand weight of at least one user demand index. And finally outputting the optimal logic with the maximum Y value as the optimal logic which is most in line with the user's expectations.

Step 105, real-time calculation of switching point and implementation optimization

Referring to fig. 7 and 1, in one embodiment, the method further includes:

and under the condition that the preset switching condition is met, re-executing the steps of acquiring the segmented voyages divided according to the beam switching points in the designated voyages, calculating all the executable beam switching strategies and selecting the beam switching strategies to be implemented. That is, in the case that the preset switching condition is satisfied, steps S120, S130 and S140 are re-performed.

Wherein, the preset switching condition may include at least one of: entering a new switching point, deviating from the track and preset switching conditions triggered by other emergency conditions. And under the condition that the preset switching condition is met, the optimal beam switching strategy is reselected. And updating the logic of the whole optimal switching point according to real-time conditions, and dynamically adjusting the logic of the optimal switching point.

Specifically, according to the preferred logical switching point, the switching logic calculation can be performed once every new switching point is entered. Wherein the switching logic calculation may be performed when:

1) And in case of emergency, the track model is deviated in large scale.

When the latest flight route can be obtained through cooperation of the front cabins, track points are regenerated according to the adjusted tracks, and new logic calculation is performed.

When the latest flight path is not available, the preference logic is not validated. In this case the switching can be performed according to existing logic whenever an available switching point is encountered.

2) At a certain switching point, when the load of the switching target network is high.

And (3) adjusting the signal quality (bandwidth) assignment in the step 04, and carrying out total bandwidth calculation again by taking the switching point as a starting point and selecting a new switching logic according to a weighting method.

3) The online network suddenly breaks down during the process.

The broken network is rejected in the switchable beams and then the logical preference calculation is re-performed.

In summary, the embodiment of the application can provide an optimal beam switching strategy, which has the following beneficial effects and advantages:

1. and establishing a real-time interaction channel between the airborne terminal and the ground data center through a broadband satellite internet channel, so as to realize the intercommunication between the ground and the multiple terminals.

2. And acquiring the positions of coverage boundary data points of the satellite beams through satellite network EIRP value data collection when the multiple terminals cut into the satellite beams at different geographic position points, and solving the problems of real-time performance and effectiveness of the coverage boundaries of different satellite beams.

3. The method comprises the steps of obtaining channel information of different types of different routes through a ground data center, and collecting actual flight track data of the aircraft through a GPS and/or Beidou system of a terminal, so that the flight data of the aircraft of a certain type are built, and further, a flight track model is built.

4. According to the actual user demand as the bottom layer drive supporting the switching logic, a switching model is established, and weight assignment is carried out on bandwidth, coverage rate, switching times and the like under different switching strategies, so that the optimal switching point logic is formulated according to the optimal principle of minimum switching times and maximum network bandwidth.

5. Triggering real-time switching logic optimization at a switching point in a switching model, and judging the switching according to real-time conditions. And updating the whole optimal switching point logic according to the switching result actually triggered at the time. The updated optimal switching logic can be adopted in real time in the whole voyage, so that the best network service effect is achieved. The switching condition may include emergency conditions shared by other terminals, including signal problems and channel problems caused by control, climate and other reasons.

As shown in fig. 12, the present application further provides an embodiment of a satellite beam switching device of an on-board terminal. Regarding the beneficial effects of the device or the technical problems to be solved, reference may be made to the description in the method corresponding to each device, or reference may be made to the description in the summary of the invention, which is not repeated here.

In an embodiment of the satellite beam switching device of the on-board terminal, the device comprises:

a construction unit 100, configured to construct a flight trajectory model, a satellite coverage model, a user demand model, and a satellite beam model corresponding to the specified range; the satellite coverage model comprises satellite signal indexes corresponding to all positions in the appointed course, the user demand model comprises at least one user demand index in the appointed course, and the satellite beam model comprises a satellite beam switching boundary;

A segmentation unit 200, configured to determine a beam switching point according to a switching boundary of the satellite beam and the flight trajectory model, and obtain segmented ranges divided according to the beam switching point in the specified ranges, where each segmented range corresponds to at least one selectable beam;

a calculating unit 300, configured to calculate all applicable beam switching policies according to the segmentation voyage and the corresponding selectable beams; the beam switching strategy comprises each beam switching point in the appointed course and a corresponding switched selectable beam;

and a selecting unit 400, configured to select a beam switching strategy to be implemented from all the enforceable beam switching strategies according to the satellite coverage model and the user demand model.

In one embodiment, the computing unit 300 is configured to:

In one embodiment, the selection unit 400 is configured to:

In one embodiment, the satellite signal index includes a bandwidth value of the satellite signal, and the selecting unit 400 is further configured to:

In one embodiment, the selection unit 400 is further configured to:

In one embodiment, the method further comprises: and re-executing the functions executed by the segmentation unit, the calculation unit and the selection unit when the preset switching condition is met.

Fig. 13 is a schematic diagram of a computing device 900 provided in an embodiment of the present application. The computing device 900 includes: processor 910, memory 920, and communication interface 930.

It should be appreciated that the communication interface 930 in the computing device 900 shown in fig. 13 may be used to communicate with other devices.

Wherein the processor 910 may be coupled to a memory 920. The memory 920 may be used to store the program codes and data. Accordingly, the memory 920 may be a storage unit internal to the processor 910, an external storage unit independent of the processor 910, or a component including a storage unit internal to the processor 910 and an external storage unit independent of the processor 910.

Optionally, computing device 900 may also include a bus. The memory 920 and the communication interface 930 may be connected to the processor 910 through a bus. The bus may be a peripheral component interconnect standard (Peripheral Component Interconnect, PCI) bus or an extended industry standard architecture (Extended Industry Standard Architecture, EISA) bus, or the like. The buses may be classified as address buses, data buses, control buses, etc.

It should be appreciated that in embodiments of the present application, the processor 910 may employ a central processing unit (central processing unit, CPU). The processor may also be other general purpose processors, digital signal processors (digital signal processor, DSP), application specific integrated circuits (Application specific integrated circuit, ASIC), off-the-shelf programmable gate arrays (field programmable gate Array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. Or the processor 910 may employ one or more integrated circuits for executing associated programs to perform the techniques provided in the embodiments of the present application.

The memory 920 may include read only memory and random access memory and provide instructions and data to the processor 910. A portion of the processor 910 may also include nonvolatile random access memory. For example, the processor 910 may also store information of the device type.

When the computing device 900 is running, the processor 910 executes computer-executable instructions in the memory 920 to perform the operational steps of the methods described above.

It should be understood that the computing device 900 according to the embodiments of the present application may correspond to a respective subject performing the methods according to the embodiments of the present application, and that the foregoing and other operations and/or functions of the respective modules in the computing device 900 are respectively for implementing the respective flows of the methods of the embodiments, and are not described herein for brevity.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, and are not repeated herein.

In the several embodiments provided in this application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.

The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer-readable storage medium. Based on such understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.

The embodiments of the present application also provide a computer readable storage medium having a computer program stored thereon, which when executed by a processor is configured to perform a satellite beam switching method for an on-board terminal, the method including at least one of the solutions described in the foregoing embodiments.

Any combination of one or more computer readable media may be employed as the computer storage media of the embodiments herein. The computer readable medium may be a computer readable signal medium or a computer readable storage medium. The computer readable storage medium can be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or a combination of any of the foregoing. More specific examples (a non-exhaustive list) of the computer-readable storage medium would include the following: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In this document, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.

The computer readable signal medium may include a propagated data signal with computer readable program code embodied therein, either in baseband or as part of a carrier wave. Such a propagated data signal may take any of a variety of forms, including, but not limited to, electro-magnetic, optical, or any suitable combination of the foregoing. A computer readable signal medium may also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device.

Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.

Computer program code for carrying out operations of the present application may be written in one or more programming languages, including an object oriented programming language such as Java, smalltalk, C ++ and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any kind of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or may be connected to an external computer (for example, through the Internet using an Internet service provider).

Note that the above is only the preferred embodiments of the present application and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, while the present application has been described in connection with the above embodiments, the present invention is not limited to the above embodiments, but may include many other equivalent embodiments without departing from the spirit of the present invention, and the present invention is also within the scope of protection.

Claims

1. The satellite wave beam switching method of the airborne terminal is characterized by comprising the following steps of:

2. The method of claim 1, wherein said calculating all applicable beam switching strategies from said segmented leg and corresponding selectable beams comprises:

3. The method according to claim 1 or 2, wherein said selecting a beam switching strategy to be implemented from said all available beam switching strategies according to said satellite coverage model and said user demand model comprises:

4. A method according to claim 3, wherein the satellite signal indicator comprises a bandwidth value of a satellite signal, the method further comprising:

5. The method according to claim 4, wherein the method further comprises:

6. The method of claim 5, wherein the method further comprises:

7. The method of claim 6, wherein the user demand indicator comprises at least one of full range bandwidth, number of satellite handovers, number of beam handovers.

8. The method according to claim 1 or 2, characterized in that the method further comprises:

9. A satellite beam switching device for an on-board terminal, comprising:

10. A computing device, comprising:

a communication interface;

at least one processor coupled to the communication interface; and

at least one memory coupled to the processor and storing program instructions that, when executed by the at least one processor, cause the at least one processor to perform the method of any of claims 1-8.