CN114553300A - Method and system for rapidly allocating wireless resources of multi-antenna earth station of satellite system - Google Patents
Method and system for rapidly allocating wireless resources of multi-antenna earth station of satellite system Download PDFInfo
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- H04B7/185—Space-based or airborne stations; Stations for satellite systems
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- H04B7/18539—Arrangements for managing radio, resources, i.e. for establishing or releasing a connection
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- H04B7/185—Space-based or airborne stations; Stations for satellite systems
- H04B7/1853—Satellite systems for providing telephony service to a mobile station, i.e. mobile satellite service
- H04B7/18545—Arrangements for managing station mobility, i.e. for station registration or localisation
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- H04B7/1853—Satellite systems for providing telephony service to a mobile station, i.e. mobile satellite service
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Abstract
The invention relates to a method and a system for quickly allocating wireless resources of a satellite system multi-antenna earth station, wherein the method comprises the following steps: determining the positions of all satellites at each moment and a visible satellite set of each earth station at each moment, wherein each earth station is provided with a single antenna or a plurality of antennas, and selecting satellites with the number not more than the number of the antennas in the visible satellite set for establishing link communication; according to a visible satellite set, based on an interference mechanism among links, calculating lumped interference generated by multiple antennas, determining constraint conditions, obtaining an optimization problem aiming at maximizing total communication capacity, solving the optimization problem to obtain wireless resource distribution information, and completing distribution. The method has the advantages of simple operation and low calculation complexity, can quickly allocate resources for the multi-antenna earth station, meets the interference constraint between systems, improves the communication capacity of a satellite communication system, and can be widely applied to the technical field of satellite communication.
Description
Technical Field
The invention relates to the technical field of satellite communication in mobile communication, in particular to a method and a system for rapidly allocating wireless resources of a satellite system multi-antenna earth station.
Background
Currently, satellite internet communication systems represented by OneWeb and Starlink are rapidly developed, and satellite communication will become an essential communication means in the near future. The gateway station is an important node of a core backbone network in a communication constellation and is used for establishing connection between a ground system and a satellite system. At present, a part of earth stations are provided with a plurality of antennas, and the plurality of antennas can be simultaneously linked with a plurality of communication satellites and transmit data, so that the requirement of a satellite communication system on large capacity is met, and therefore, the multi-antenna system becomes a development trend of a satellite communication network ground node, particularly a gateway station. For operators of the new generation of multi-antenna earth stations, allocation of radio resources such as beams, power, etc. is crucial.
On the other hand, most of the currently rapidly developed satellite communication systems provide broadband communication services, and the service frequency bands of the satellite communication systems are focused on the frequency bands such as Ku and Ka. When the communication characteristics of frequency, polarization, link direction, etc. of each communication constellation are the same, intersystem interference will inevitably occur, which also becomes an important constraint for the allocation of radio resources of earth stations. Especially for earth stations with multiple antennas, it is necessary to ensure that the interference on any link is not excessive, which is a severe constraint.
Common access methods of the existing satellite system include highest elevation access, longest visible time access, and the like. When the earth station is provided with a plurality of antennas, the links can be selected to be accessed from high to low or from long to short according to the elevation angle of the links in turn until the number of the accessed links is the same as that of the antennas. For inter-system interference mitigation, a common interference mitigation measure is an airspace isolation or power control method, but for large-scale non-stationary orbit constellations such as OneWeb, Starlink and the like, the positions of satellites of the space isolation or power control method are rapidly changed, and particularly for earth stations at a relatively short distance, the division of the airspace isolation region is difficult to realize. The power control method is to reduce the transmission power to mitigate the interference when the intersystem interference exceeds the standard, but this will cause the reduction of the system capacity. Therefore, it becomes difficult to rapidly and dynamically allocate radio resources such as links and power to the multi-antenna earth station under the interference constraint.
Disclosure of Invention
In view of the above problems, an object of the present invention is to provide a method and a system for fast allocating wireless resources of a satellite system multi-antenna earth station, which are simple to operate and low in computational complexity.
In order to achieve the purpose, the invention adopts the following technical scheme: a method for rapidly allocating wireless resources of a satellite system multi-antenna earth station comprises the following steps: determining the positions of all satellites at each moment and a visible satellite set of each earth station at each moment, wherein each earth station is provided with a single antenna or a plurality of antennas, and selecting satellites with the number not more than the number of the antennas in the visible satellite set for establishing link communication; according to a visible satellite set, based on an interference mechanism among links, calculating lumped interference generated by multiple antennas, determining constraint conditions, obtaining an optimization problem aiming at maximizing total communication capacity, solving the optimization problem to obtain wireless resource distribution information, and completing distribution.
Further, the determining all satellite positions at each time includes: and determining the orbit position of each satellite at each moment by adopting a searching ephemeris database or a ground orbit determination mode.
Further, the determining a set of visible satellites for each earth station at each time includes: determining the visual relationship between any one satellite and the earth station according to the position of each satellite and the lowest working elevation angle of the earth station at each moment to obtain a visual satellite; all visible satellites are defined as a set of visible satellites.
Further, the determining constraint conditions comprise a visual relation constraint, a power constraint, an antenna number constraint and an interference constraint;
the visual relation constraint means that the selected accessed satellite is in a visual satellite set;
the power constraint means that the transmission power of the link is less than the maximum transmission power;
the antenna number constraint means that the number of the selected accessed satellites is less than the number of the antennas of the gateway station;
the interference constraint means that the interference of all links of a certain satellite system to any link of another satellite system cannot exceed the standard.
Further, the radio resource allocation information includes beam resource allocation information and power resource allocation information;
the beam resource allocation is to dynamically adjust the azimuth angle and elevation angle pointing instructions of each antenna according to the acquired beam resource allocation information, and select corresponding satellite access from a visible satellite set;
the power resource allocation is to dynamically adjust the transmitting power of each antenna radiation feed source according to the acquired power resource allocation information, so that the satellite and the ground station establish link communication.
Further, the solving the optimization problem to obtain the radio resource allocation information includes:
the constraint of the number of antennas is relaxed, and the original optimization problem is converted into a sub-optimization problem about each satellite system on the assumption that each earth station is provided with antennas with the number not less than that of visible satellites;
solving a sub-optimization problem by iteration, comprising:
respectively solving the sub-optimization problem to obtain a power emission optimal solution;
calculating the interference between the two links according to the optimal power transmission solution, updating the objective function, and solving the optimal power transmission solution again;
calculating new interference between the two links according to the obtained power emission optimal solution;
repeating the iteration process until convergence, and obtaining beam resource allocation information and power resource allocation information;
and then considering the number constraint of the antennas, and selecting the link access according to the capacity of each link.
Further, the convergence condition is: the beam resource allocation information and the power resource allocation information obtained again in a certain iteration are the same as those obtained in the last iteration.
A satellite system multiple antenna earth station radio resource fast allocation system, comprising: the visible satellite set acquisition module is used for determining the positions of all satellites at each moment and the visible satellite set of each earth station at each moment, each earth station is provided with a single antenna or a plurality of antennas, and satellite connection communication with the number of antennas not more than the number of antennas is selected in the visible satellite set; and the resource allocation processing and calculating module is used for calculating lumped interference generated by multiple antennas based on an interference mechanism among links according to the visible satellite set, determining constraint conditions, obtaining an optimization problem aiming at maximizing the total communication capacity, solving the optimization problem to obtain wireless resource allocation information and finishing allocation.
A computer readable storage medium storing one or more programs, the one or more programs comprising instructions, which when executed by a computing device, cause the computing device to perform any of the above methods.
A computing device, comprising: one or more processors, memory, and one or more programs stored in the memory and configured to be executed by the one or more processors, the one or more programs including instructions for performing any of the above-described methods.
Due to the adoption of the technical scheme, the invention has the following advantages:
1. the invention realizes the rapid distribution of wireless resources such as wave beams, power and the like by taking the interference between satellite systems as constraint and at the cost of low computation complexity.
2. The method can solve the problem of beam and power resource allocation at one time on the premise that the interference between satellite systems does not exceed the standard, and compared with a common method of 'highest elevation angle + power control' for the satellite systems, the method provided by the invention can greatly improve the overall communication capacity of the system and realize the performance close to the optimal performance.
3. Compared with the traditional iterative algorithms such as a feasible direction method and the like, the iterative part adopted by the method greatly reduces the calculation complexity.
4. The invention describes the resource allocation problem under the constraint of intersystem interference as an optimization problem, and solves the problem simply and quickly through conversion, decomposition and iteration.
In conclusion, the method has the characteristics of simple operation, low calculation complexity and capability of rapidly allocating resources for the multi-antenna earth station of the satellite system, and the communication capacity of the satellite system is improved while the interference constraint between the systems is met.
Drawings
FIG. 1 is a flowchart illustrating an embodiment of a method for fast allocation of radio resources;
FIG. 2 is a schematic diagram of a scenario in an embodiment of the present invention;
FIG. 3 is a schematic diagram of a method for rapidly allocating radio resources of a multi-antenna earth station of a satellite system according to an embodiment of the present invention;
FIG. 4 is a graph comparing the interference situation of the method of the present invention and the "maximum elevation angle + random power" method in accordance with one embodiment of the present invention;
fig. 5 is a graph comparing the capacity of the method of the present invention with the "highest elevation angle + power control" method in an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention, are within the scope of the invention.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The invention provides a method and a system for rapidly allocating wireless resources of a satellite system multi-antenna earth station. The resource allocation problem under the constraint of intersystem interference is described as an optimization problem, and the optimization problem is converted into a sub-problem about two systems through decomposition and conversion. And the problem is solved simply and quickly through an iterative algorithm. The analysis method adopted by the invention has the advantages of simple operation and low calculation complexity, can quickly allocate resources for the multi-antenna earth station, meets the interference constraint between systems, and improves the communication capacity of the satellite communication system.
In one embodiment of the invention, a method for rapidly allocating wireless resources of a multi-antenna earth station of a satellite system is provided. In this embodiment, as shown in fig. 1, the method includes the following steps:
1) determining the positions of all satellites at each moment and a visible satellite set of each earth station at each moment, wherein each earth station is provided with a single antenna or a plurality of antennas, and satellite link establishment communication with the number of antennas not more than the number of antennas can be selected in the visible satellite set;
2) according to a visible satellite set, based on an interference mechanism among links, calculating lumped interference generated by multiple antennas, determining constraint conditions, obtaining an optimization problem aiming at maximizing total communication capacity, solving the optimization problem to obtain wireless resource distribution information, and completing distribution.
In this embodiment, two satellite systems are included, and each satellite system may include multiple satellites. As shown in fig. 2, two satellite systems each include an earth station with multiple antennas and one or more satellites. The position of the earth station of the first satellite system 1 is indicated as
The position of the earth station of the second satellite system 2 is indicated as
Are respectively provided with MthSub-antenna and NthA secondary antenna;
in the step 1), determining all the satellite positions at each moment includes: and determining the orbit position of each satellite at each moment by adopting a searching ephemeris database or a ground orbit determination mode.
In the step 1), determining a set of visible satellites of each earth station at each time specifically includes: determining the visual relationship between any one satellite and the earth station according to the position of each satellite and the lowest working elevation angle of the earth station at each moment to obtain a visual satellite; all visible satellites are defined as a set of visible satellites.
For example, the satellite positions of the first satellite system 1Is shown as
The satellite position of the second satellite system 2 is indicated as
According to
And the lowest working elevation angle of the earth station, determining the visual relationship between any one satellite and the earth station, wherein the visual relationship determining method adopts the existing method in the prior art, and is not described in detail in this embodiment. All visible satellites are defined as a set of visible satellites, where the set of visible satellites of the first satellite system 1 includes M satellites, and the set of visible satellites of the second satellite system 2 includes N satellites.
In the step 2), determining constraint conditions, wherein the behavior examples under the first satellite system 1 include visual relationship constraint, power constraint, antenna number constraint and interference constraint;
the visual relation constraint means that the selected accessed satellite is in a visual satellite set;
the power constraint means that the transmission power of the link should be less than the maximum transmission power;
the antenna number constraint means that the number of the selected accessed satellites is less than the number of the antennas of the gateway station;
the interference constraint means that the interference of all links of one satellite system to any link of another satellite system cannot exceed the standard (exceeding the standard is over the standard set in advance by the system itself or the international universal interference protection standard). For example, in this embodiment, the interference of all links of the first satellite system 1 to any link of the second satellite system 2 cannot exceed the standard. The interference of the second satellite system 2 with the first satellite system 1 should also satisfy the above constraints.
In the step 2), the radio resource allocation information includes beam resource allocation information and power resource allocation information;
the beam resource allocation is to dynamically adjust the azimuth angle and elevation angle pointing instructions of each antenna according to the acquired beam resource allocation information, and select corresponding satellite access from a visible satellite set;
the power resource allocation is to dynamically adjust the transmitting power of each antenna radiation feed source according to the acquired power resource allocation information, so that the satellite and the ground station establish link communication.
In the step 2), solving the optimization problem to obtain the radio resource allocation information includes the following steps:
2.1) relaxing the antenna number constraint, assuming that each earth station is provided with no less than the number of visible satellites, converting the original optimization problem into a sub-optimization problem about each satellite system, for example, converting the original optimization problem into a sub-optimization problem about a first satellite system 1 and a second satellite system 2;
2.2) solving the sub-optimization problem by iteration, comprising the steps of:
2.2.1) interference I between the first satellite system 1 and the second satellite system 22→1,iAnd I1→2,jAssigning initial values, respectively solving the sub-optimization problem to obtain the optimal power emission solution
The representation represents the transmission power of the first satellite system 1 and the second satellite system 2, respectively.
2.2.2) transmitting optimal solutions according to Power
Calculating the interference between two links I2→1,iAnd I1→2,jUpdating the target function, solving the optimal power emission solution again, and recording the optimal power emission solution as
2.2.3) transmitting the optimal solution again according to the obtained power
Calculating new interference between two links
And
2.2.4) repeating the iterative process until convergence, and obtaining the beam resource allocation information and the power resource allocation information.
2.2.5) considering the constraint of the number of antennas, and according to the capacity of each link, the first satellite system 1 and the second satellite system 2 select M in turnthAnd NthBar link access, MthAnd NthThe number of antennas of the first satellite system 1 and the second satellite system 2 is indicated, respectively.
Wherein the convergence condition is as follows: the beam resource allocation information and the power resource allocation information obtained again in a certain iteration are the same as those obtained in the last iteration.
In this embodiment, the optimization problem includes the above visual relationship constraint, power constraint, antenna number constraint, and interference constraint.
In the step 2.2.4), the beam resource allocation information is the antenna pointing information. The direction pointed by the ith antenna can be expressed as
According to
The conversion method is a basic technology commonly known by those skilled in the art, and is not described herein again. The second satellite system 2 works the same.
The power resource allocation information is the transmission power information. To be provided with
For the transmission power of the ith link of the first satellite system 1, to
And for the transmitting power of the ith link of the second satellite system 2, the antenna radiation feed source transmits signals according to the power, and satellite-ground link building is completed.
DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION
As shown in fig. 3, the OneWeb system and the Starlink first-stage sub-constellation are selected as simulation objects, the OneWeb system gateway station selects the earth station (code CLE) located in cleaviston, the Starlink gateway station selects the florida earth station (code FGS), and the distance between the two stations is 270 km. As shown in table 1, the simulation parameters are given.
TABLE 1 simulation parameters
The following column writes the constraints of the optimization problem.
0≤p1,i≤P1,max
wherein p is1,iRepresenting the transmission power, P, of the first satellite system 11,maxRepresenting the maximum transmit power of the first satellite system 1.
wherein v is1,iThe access relationship of the ith link is represented by {0,1}, where 1 represents access and 0 represents no access.
wherein G is1t,i(. o) represents the gain of the on-board transmitting antenna of the first satellite system 1, G2r,j(. is the reception gain, λ, of the j-th link of the gateway station of the second satellite system 21,iFor the signal wavelength of the ith link of the first satellite system 1, d1,iRepresenting the ith link length of the first satellite system 1. Theta1,i,jAnd theta2,i,jRespectively showing the included angle between the transmitting end and the receiving end between the ith link of the first satellite system 1 and the jth link of the second satellite system 2. W is a group of1,iIndicates the bandwidth, W, of the ith link of the first satellite system 12,jIndicating the bandwidth of the jth link of the second satellite system 2. Abbreviated as I1→2,i,j＝a1,i,jp1,iWherein
a1,i,j＝G1t,i(θ1,i,j)G2r,j(θ2,i,j)(λ1,i/4πd1,i)2min{W2,j/W1,i,1}
The interference constraint can be expressed as:
in which I2,thIs the second satellite system 2 interference threshold. The second satellite system 2 works the same.
According to the Shannon formula, the sum c of the communication rates of the links of the first satellite system 1 can be calculated1Expressed as:
to this end, the following optimization problem is obtained:
s.t.C1:
C2:
C3:
C4:
C5:0≤p1,i≤P1,max,i＝1,2,...,M
C6:0≤p2,j≤P2,max,j＝1,2,...,N
C7:v1,i∈{0,1},i＝1,2,...,M
C8:v2,j∈{0,1},j＝1,2,...,N
taking the first satellite system 1 as an example, when the ith link of the first satellite system 1 and the jth link of the second satellite system 2 are pointing close to each other, a1,i,jOtherwise, the value is very small, so it is these elements in the matrix that mainly play the role of interference constraint, and in this embodiment, the upper bound of each link of the interference weight matrix is taken as the interference coefficient a'1,iNamely:
a′1,i＝max{a1,i,1,a1,i,2,…,a1,i,N}
the original problem is converted into the following optimization problem:
P1′:
s.t.C1:
C2:p1,i≥0,i＝1,2,...,M
C3:P1,max-p1,i≥0,i＝1,2,...,M
P2′:
s.t.C1:
C2:p2,j≥0,j＝1,2,...,N
C3:P2,max-p2,j≥0,j＝1,2,…,N
the solution is started next. Taking the first satellite system 1 as an example, the following two cases are divided:
case 1: if it is not
At this time, all visible links transmit at maximum power without exceeding the interference limit, then
Case 2: if it is not
At this point, the interference constraint needs to be satisfied, i.e.
We iterate the solution through the outer loop and the inner loop. According to the Qinyang inequality, the optimal solution (recorded as Qinyang inequality) can be known
) Can be expressed as:
wherein c is1,i＝b1,i/(kT1W1+I2→1,i) After the power is added, the optimal solution is as follows:
starting an inner loop, and updating the rule as follows:
the condition for stopping the iteration is
And
and are equal. The second satellite system 2 works the same.
On the basis of the inner loop, in the kth outer loop, the updating rule is as follows:
to this end, an optimal solution to relax the antenna constraints is given
The introduction of antenna constraints, taking the first satellite system 1 as an example, can be divided into the following two cases:
case 1: if M is0≤MthThen the optimal solution
Case 2: if M is0>MthAccording to each link
Descending order, selecting M from big to smallthLink access, which is divided into two cases:
case2.1: if it is not
The optimal solution is then:
case2.1: if it is not
Then, starting the K +1 th outer loop based on the previous K outer loops, where the initial value of the constraint condition is:
the iteration is restarted, and the iteration steps are the same as the method. The second satellite system 2 works the same.
According to the above steps, the results shown in fig. 4 and 5 can be obtained. In fig. 4, the "highest elevation angle + random power" is used as a comparison algorithm, and it can be seen that the present invention can reduce the intersystem interference below the threshold. Fig. 5 shows that the system 1 capacity, the system 2 capacity and the total capacity can be effectively improved by using "the highest elevation angle + the power control" as a comparison algorithm, and when the number of antennas is large (about 20), the total capacity can be improved by more than 25%.
In one embodiment of the present invention, a system for rapidly allocating radio resources of a satellite system with multiple antenna earth stations is provided, which comprises:
the visible satellite set acquisition module is used for determining the positions of all satellites at each moment and the visible satellite set of each earth station at each moment, each earth station is provided with a single antenna or a plurality of antennas, and satellite link establishment communication with the number of antennas not more than the number of antennas can be selected from the visible satellite set;
and the resource allocation processing and calculating module is used for calculating lumped interference generated by multiple antennas based on an interference mechanism among links according to the visible satellite set, determining constraint conditions, obtaining an optimization problem aiming at maximizing the total communication capacity, solving the optimization problem to obtain wireless resource allocation information and finishing allocation.
The system provided in this embodiment is used for executing the above method embodiments, and for details of the process and the details, reference is made to the above embodiments, which are not described herein again.
In an embodiment of the present invention, a computing device structure is provided, where the computing device may be a terminal, and the computing device structure may include: a processor (processor), a communication Interface (communication Interface), a memory (memory), a display screen and an input device. The processor, the communication interface and the memory are communicated with each other through a communication bus. The processor is used to provide computing and control capabilities. The memory includes a non-volatile storage medium, an internal memory, the non-volatile storage medium storing an operating system and a computer program, the computer program being executed by the processor to implement a method of fast allocation of radio resources; the internal memory provides an environment for the operation of an operating system and computer programs in the non-volatile storage medium. The communication interface is used for carrying out wired or wireless communication with an external terminal, and the wireless communication can be realized through WIFI, a manager network, NFC (near field communication) or other technologies. The display screen can be a liquid crystal display screen or an electronic ink display screen, and the input device can be a touch layer covered on the display screen, a key, a track ball or a touch pad arranged on a shell of the computing equipment, an external keyboard, a touch pad or a mouse and the like. The processor may call logic instructions in memory to perform the following method: determining the positions of all satellites at each moment and a visible satellite set of each earth station at each moment, wherein each earth station is provided with a single antenna or a plurality of antennas, and selecting satellites with the number not more than the number of the antennas in the visible satellite set for establishing link communication; according to a visible satellite set, based on an interference mechanism among links, calculating lumped interference generated by multiple antennas, determining constraint conditions, obtaining an optimization problem aiming at maximizing total communication capacity, solving the optimization problem to obtain wireless resource distribution information, and completing distribution.
In addition, the logic instructions in the memory may be implemented in the form of software functional units and may be stored in a computer readable storage medium when sold or used as a stand-alone product. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk, and various media capable of storing program codes.
Those skilled in the art will appreciate that the above-described computing device configurations, which are merely partial configurations associated with the present application, do not constitute a limitation on the computing devices to which the present application is applied, and that a particular computing device may include more or fewer components, or some components in combination, or have a different arrangement of components.
In one embodiment of the invention, a computer program product is provided, the computer program product comprising a computer program stored on a non-transitory computer-readable storage medium, the computer program comprising program instructions that, when executed by a computer, enable the computer to perform the methods provided by the above-described method embodiments, for example, comprising: determining the positions of all satellites at each moment and a visible satellite set of each earth station at each moment, wherein each earth station is provided with a single antenna or a plurality of antennas, and selecting satellites with the number not more than the number of the antennas in the visible satellite set for establishing link communication; according to a visible satellite set, based on an interference mechanism among links, calculating lumped interference generated by multiple antennas, determining constraint conditions, obtaining an optimization problem aiming at maximizing total communication capacity, solving the optimization problem to obtain wireless resource distribution information, and completing distribution.
In one embodiment of the invention, a non-transitory computer-readable storage medium is provided, which stores server instructions that cause a computer to perform the methods provided by the above embodiments, for example, including: determining the positions of all satellites at each moment and a visible satellite set of each earth station at each moment, wherein each earth station is provided with a single antenna or a plurality of antennas, and selecting satellites with the number not more than the number of the antennas in the visible satellite set for establishing link communication; according to a visible satellite set, based on an interference mechanism among links, calculating lumped interference generated by multiple antennas, determining constraint conditions, obtaining an optimization problem aiming at maximizing total communication capacity, solving the optimization problem to obtain wireless resource distribution information, and completing distribution.
The implementation principle and technical effect of the computer-readable storage medium provided by the above embodiments are similar to those of the above method embodiments, and are not described herein again.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A method for rapidly allocating wireless resources of a satellite system multi-antenna earth station is characterized by comprising the following steps:
determining the positions of all satellites at each moment and a visible satellite set of each earth station at each moment, wherein each earth station is provided with a single antenna or a plurality of antennas, and selecting satellites with the number not more than the number of the antennas in the visible satellite set for establishing link communication;
according to a visible satellite set, based on an interference mechanism among links, calculating lumped interference generated by multiple antennas, determining constraint conditions, obtaining an optimization problem aiming at maximizing total communication capacity, solving the optimization problem to obtain wireless resource distribution information, and completing distribution.
2. The method for fast allocation of multi-antenna earth station radio resources for a satellite system of claim 1 wherein said determining the total satellite position at each time instant comprises: and determining the orbit position of each satellite at each moment by adopting a searching ephemeris database or a ground orbit determination mode.
3. The method for rapidly allocating radio resources for multiple antenna earth stations in a satellite system as claimed in claim 1, wherein said determining a set of visible satellites for each earth station at each time comprises:
determining the visual relationship between any one satellite and the earth station according to the position of each satellite and the lowest working elevation angle of the earth station at each moment to obtain a visual satellite; all visible satellites are defined as a set of visible satellites.
4. The method for rapidly allocating radio resources for a multi-antenna earth station in a satellite system as claimed in claim 1, wherein said determined constraints include a visual relationship constraint, a power constraint, an antenna number constraint and an interference constraint;
the visual relation constraint means that the selected accessed satellite is in a visual satellite set;
the power constraint means that the transmission power of the link is less than the maximum transmission power;
the antenna number constraint means that the number of the selected accessed satellites is less than the number of the antennas of the gateway station;
the interference constraint means that the interference of all links of a certain satellite system to any link of another satellite system cannot exceed the standard.
5. The method for rapidly allocating radio resources for a multi-antenna earth station of a satellite system as claimed in claim 1, wherein said radio resource allocation information includes beam resource allocation information and power resource allocation information;
the beam resource allocation is to dynamically adjust the azimuth angle and elevation angle pointing instructions of each antenna according to the acquired beam resource allocation information, and select corresponding satellite access from a visible satellite set;
the power resource allocation is to dynamically adjust the transmitting power of each antenna radiation feed source according to the acquired power resource allocation information, so that the satellite and the ground station establish link communication.
6. The method for rapidly allocating radio resources of a multi-antenna earth station in a satellite system according to claim 1 or 5, wherein said solving the optimization problem to obtain the radio resource allocation information comprises:
the constraint of the number of antennas is relaxed, and the original optimization problem is converted into a sub-optimization problem about each satellite system on the assumption that each earth station is provided with antennas with the number not less than that of visible satellites;
solving a sub-optimization problem by iteration, comprising:
respectively solving the sub-optimization problem to obtain a power emission optimal solution;
calculating the interference between the two links according to the optimal power transmission solution, updating the objective function, and solving the optimal power transmission solution again;
calculating new interference between the two links according to the obtained power emission optimal solution;
repeating the iteration process until convergence, and obtaining beam resource allocation information and power resource allocation information;
and then considering the number constraint of the antennas, and selecting the link access according to the capacity of each link.
7. The method for fast allocation of multi-antenna earth station radio resources for a satellite system of claim 6, wherein said convergence condition is: the beam resource allocation information and the power resource allocation information obtained again in a certain iteration are the same as those obtained in the last iteration.
8. A system for rapidly allocating wireless resources for a multi-antenna earth station in a satellite system, comprising:
the visible satellite set acquisition module is used for determining the positions of all satellites at each moment and the visible satellite set of each earth station at each moment, each earth station is provided with a single antenna or a plurality of antennas, and satellite connection communication with the number of antennas not more than the number of antennas is selected in the visible satellite set;
and the resource allocation processing and calculating module is used for calculating lumped interference generated by multiple antennas based on an interference mechanism among links according to the visible satellite set, determining constraint conditions, obtaining an optimization problem aiming at maximizing the total communication capacity, solving the optimization problem to obtain wireless resource allocation information and finishing allocation.
9. A computer readable storage medium storing one or more programs, the one or more programs comprising instructions, which when executed by a computing device, cause the computing device to perform any of the methods of claims 1-7.
10. A computing device, comprising: one or more processors, memory, and one or more programs stored in the memory and configured to be executed by the one or more processors, the one or more programs including instructions for performing any of the methods of claims 1-7.
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