CN113644953B - Frequency plan self-adaptive adjusting method and device for high-throughput satellite and storage medium - Google Patents
Frequency plan self-adaptive adjusting method and device for high-throughput satellite and storage medium Download PDFInfo
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- CN113644953B CN113644953B CN202110679561.9A CN202110679561A CN113644953B CN 113644953 B CN113644953 B CN 113644953B CN 202110679561 A CN202110679561 A CN 202110679561A CN 113644953 B CN113644953 B CN 113644953B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/185—Space-based or airborne stations; Stations for satellite systems
- H04B7/1851—Systems using a satellite or space-based relay
- H04B7/18513—Transmission in a satellite or space-based system
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
- H04W72/541—Allocation or scheduling criteria for wireless resources based on quality criteria using the level of interference
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/56—Allocation or scheduling criteria for wireless resources based on priority criteria
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Abstract
A frequency plan self-adaptive adjusting method of a high-throughput satellite mainly comprises the steps of inputting a current frequency plan and the bandwidth requirement of each beam, distributing beam priorities, calculating the frequency distribution combination of each group of beams, calculating the frequency distribution scheme with minimum interference among the beams, distributing the same-frequency parts among adjacent beams according to the priorities and outputting the frequency distribution scheme. The invention provides a frequency plan self-adaptive adjusting method of a high-throughput satellite based on flexible frequency conversion and flexible filtering technology, which reduces the same frequency interference between adjacent beams and improves the system carrier-to-interference ratio.
Description
Technical Field
The invention relates to a frequency plan self-adaptive adjusting method for a high-throughput satellite. In particular to a frequency self-adaptive adjusting method based on inter-beam interference suppression.
Background
Frequency resources are the most valuable resources of satellites, and management thereof is a key issue for planning and optimizing satellite communication networks. If the frequency management is not good when the satellite communication network is integrally planned, some performance indexes are deteriorated after the whole network is built or expanded.
There are two important drawbacks to the conventional approach when allocating satellite frequency resources.
(1) When the subcarriers are allocated to the users, the continuity of the subcarriers of one beam is not considered, which presents a great challenge to the engineering implementation of the satellite.
(2) When the frequency resource allocation of the beam is considered, the bandwidth value is calculated to meet the user requirement in one beam, but the frequency interference problem caused by bandwidth change is not considered, and how to reduce the beam interference and improve the system carrier-to-interference ratio index when the adjacent beams generate the same frequency interference is not considered.
Disclosure of Invention
The technical problem solved by the invention is as follows: the method overcomes the defects of the prior art and provides a frequency plan self-adaptive adjusting method of a high-throughput satellite. The problem that the traditional satellite is uneven in busy and idle wave beams when the user requirement changes is solved, and the system carrier-to-interference ratio index is achieved on the premise that the user communication requirement is met.
The technical solution of the invention is as follows:
in a first aspect, a method for adaptively adjusting a frequency plan of a high-throughput satellite includes the following steps:
1) obtaining m beam combinations, wherein each beam combination comprises n beams; meanwhile, the bandwidth requirement and the priority of each beam are obtained according to the upper-level input; wherein n and m are positive integers;
2) obtaining different sequence permutation and combination of each wave beam combination on the same frequency spectrum, wherein n wave beam frequencies in the same wave beam combination are sequentially permuted, and the frequency intervals of the n wave beams are not overlapped;
3) for any permutation combination, according to the topological relation of the wave beams, acquiring the condition that two wave beams in all the wave beam combinations respectively belong to different wave beam combinations, the positions of the two wave beams in the topological relation are adjacent, and the frequencies have overlapping areas as a screening object;
4) for each screening object, extracting screening objects with residual frequencies in the frequency spectrum of the beam combination where the beam is located, and judging whether the frequency of the beam in the screening combination is changed to eliminate a frequency overlapping area or not, wherein a new frequency overlapping area cannot be generated by the beam adjacent to the position; if the frequency overlapping area can be eliminated, changing the frequency of the screening beams and moving the two beams out of the screening object; otherwise, directly entering the step 5);
5) obtaining the value of the overlapping area in each screening object frequency as a frequency overlapping value, and obtaining the sum of the frequency overlapping values of all the screening objects as a frequency accumulated value;
6) traversing all permutation combinations to obtain the permutation mode of the beam frequency combination corresponding to the minimum frequency accumulated value condition in the permutation combinations as a screening result;
7) and finishing the frequency allocation work of the beam according to the beam priority input by the superior.
Optionally, the value range of n in step 1) is 4-8, and the value of m is greater than or equal to 6.
Optionally, the bandwidth span of the frequency spectrum in step 2) is greater than or equal to 1000 MHz.
Optionally, the permutation and combination manner of each group of beams in step 2) is common
And (4) seed preparation.
Optionally, the sum of the bandwidths of the beams in each beam combination in step 2) is less than or equal to the total bandwidth of the frequency spectrum.
Optionally, traversing all permutation and combination in step 6) is common
Next, the process is carried out.
Optionally, in step 7), the frequency allocation of the beam is completed according to the beam priority input by the upper level, specifically:
for two beams with different priorities in the screening result, allocating the frequency overlapping area to the beam with higher priority; and respectively allocating the frequency overlapping areas to the users at the far ends of the beams for the two beams with the same priority in the screening result.
In a second aspect, a processing apparatus comprises:
a memory for storing a computer program;
a processor for calling and running the computer program from the memory to perform the method of the first aspect.
A computer readable storage medium having stored thereon a computer program or instructions which, when executed, implement the method of the first aspect.
A computer program product comprising instructions for causing a computer to perform the method of the first aspect when the computer program product is run on a computer.
Compared with the prior art, the invention has the advantages that:
(1) the invention provides a frequency resource self-adaptive allocation method based on inter-beam interference suppression, which ensures the continuity of sub-carriers in a beam by arranging and combining the beam bandwidth in a beam group, can calculate the frequency allocation scheme with minimum adjacent beam interference when the beam bandwidth changes according to the communication requirement of a user, realizes the reallocation of a frequency plan, and has better application value;
(2) for the beams with frequency overlapping, the beam priority is introduced, and the frequency overlapping area of the adjacent beams is distributed according to the priority, so that the problem of system carrier-to-interference ratio deterioration caused by frequency plan adjustment is solved.
Drawings
FIG. 1 is a flow chart of a frequency plan adaptive adjustment method for a high throughput satellite according to the present invention;
FIG. 2 is a schematic view of the topological relationship between beams according to the present invention;
fig. 3 is a schematic diagram of the topological relationship between beams according to the present invention.
Detailed Description
The invention discloses a frequency plan self-adaptive adjusting method of a high-throughput satellite, which mainly comprises the steps of inputting a current frequency plan and the bandwidth requirement of each wave beam, distributing wave beam priorities, calculating the frequency distribution combination of each group of wave beams, calculating the frequency distribution scheme with minimum interference among the wave beams, distributing the same-frequency parts among adjacent wave beams according to the priorities and outputting the frequency distribution scheme. The method mainly comprises the following steps:
1) obtaining m beam combinations, wherein each beam combination comprises n beams; n is a positive integer, and the value range of n is 4-8; m is a positive integer, and m is greater than or equal to 6; meanwhile, the bandwidth requirement and the priority of each beam are obtained according to the upper-level input;
2) obtaining different sequence permutation and combination of each wave beam combination on the same frequency spectrum, wherein n wave beam frequencies in the same wave beam combination are sequentially permuted, and the frequency intervals of the n wave beams are not overlapped; the frequency spectrum of the high-flux satellite is generally in a Ka frequency band or even a higher frequency band, and the bandwidth dereferencing range of the frequency spectrum in the method is more than or equal to 1000 MHz; the permutation and combination of each group of beams are common
Seed growing; in the method, the sum of the bandwidths of the wave beams in each wave beam combination is less than or equal to the total bandwidth of the frequency spectrum;
3) for any permutation combination, according to the topological relation of the wave beams, acquiring the condition that two wave beams in all the wave beam combinations respectively belong to different wave beam combinations, the positions of the two wave beams in the topological relation are adjacent, and the frequencies have overlapping areas as a screening object; as shown in fig. 3, according to the superior input, the topological relationship between different beams can be determined, for example, each of the beam combination 1 and the beam combination 2 is composed of 4 beams, and the sum of bandwidths of all the beams in the same beam combination is equal to the total frequency spectrum, so that there is no frequency overlap between the beams in the same beam combination, and there is no interference between the beams in the same beam combination; the beam 2 in the beam combination 1 is adjacent to the beams 5 and 7 in the beam combination 2 in a topological relation, and if the beams 2 and the beams 5 or the beams 7 have frequency overlapping, mutual interference can be generated;
4) for each screening object, extracting screening objects with residual frequencies in the frequency spectrum of the beam combination where the beam is located, and judging whether the frequency of the beam in the screening combination is changed to eliminate a frequency overlapping area or not, wherein a new frequency overlapping area cannot be generated by the beam adjacent to the position; if the frequency overlapping area can be eliminated, changing the frequency of the screening beams and moving the two beams out of the screening object; otherwise, directly entering the step 5);
5) obtaining the value of the overlapping area in each screening object frequency as a frequency overlapping value, and obtaining the sum of the frequency overlapping values of all the screening objects as a frequency accumulated value;
6) traverse all permutation and combination, in common
Secondly, obtaining the arrangement mode of the wave beam frequency combination corresponding to the minimum frequency accumulated value in the arrangement combination as a screening result;
7) according to the priority of the beams input by the superior level, for two beams with different priorities in the screening result, allocating the frequency overlapping area to the beam with higher priority; for two beams with the same priority in the screening result, respectively allocating the frequency overlapping areas to users at the far ends of the beams; and completing the frequency allocation work of the beams.
Specifically, in the scheme provided in the embodiment of the present application, as shown in fig. 1, the method includes the following steps:
(1) inputting the bandwidth requirement and priority of each beam of the satellite, and according to the condition that every four beams are in a cluster, the sum of the bandwidths of the beams in the cluster is B _ total, and the beams in the cluster have no repetition frequency;
(2) inputting a topological relation matrix Tij between beams, wherein the value of adjacent beams is 1, otherwise, the value is 0, and i and j are the total beam number N of the system;
(3) calculating a bandwidth combination matrix Amn of each cluster of wave beams, wherein m is the number of the wave beam clusters, and n is the number of the wave beams in one cluster of wave beams;
(4) establishing a circular queue with the length of m x n, and positioning the iterator index at the 1 st bit of the data stream;
(5) taking index as a starting point to obtain a beam frequency allocation scheme under the current condition;
(6) establishing a circular queue with the length of N × N, positioning an iterator index1 at the 1 st bit of a data stream, starting from index 1-1, judging that the frequency of a beam i and the frequency of a beam j are overlapped by B _ same when the value of Tij is 1, if B _ same is greater than 0, BT + B _ same is obtained, otherwise, BT is unchanged, and index 1-index 1+ 1; if Tij is 0, skip, index1 is index1+ 1.
(7) After the loop of index1 is finished, obtaining the total frequency overlap of the current frequency scheme, if BT < BT _ same, BT _ same is BT, and index is index + 1; otherwise, BT _ same is not changed, index ═ index + 1.
(8) After index circulation is finished, obtaining a beam frequency allocation method with minimum frequency coincidence, and if BT _ same is 0, jumping to the step (10); if BT _ same is greater than 0, outputting an adjacent beam group with coincident frequency;
(9) for adjacent beams with frequency coincidence, preferentially allocating coincidence frequency to users with high priority; if the priorities are the same, the remote users on the adjacent wave beams use the same frequency resources;
(10) and outputting the final beam frequency allocation scheme.
The invention provides a frequency plan self-adaptive adjusting method of a high-throughput satellite based on flexible frequency conversion and flexible filtering technology, which reduces the same frequency interference between adjacent beams and improves the system carrier-to-interference ratio.
Examples
In one embodiment of the present invention, there are 6 beam combinations in the satellite downlink, each beam combination comprising 4 beams; the total bandwidth of the frequency spectrum of each beam combination is 1000MHz, and the frequency spectrum range is 20000 MHz-21000 MHz. FIG. 2 is a schematic diagram of a topological relationship between beams, wherein beams 1 to 4 are beam combinations 1, beams 5 to 8 are beam combinations 2, beams 9 to 12 are beam combinations 3, beams 13 to 16 are beam combinations 4, beams 17 to 20 are beam combinations 5, and beams 21 to 24 are beam combinations 6.
The bandwidth requirements and priorities of each beam are input as the following table, and the priorities are 1, 2, 3 and 4, wherein 1 represents the highest priority and 4 represents the lowest priority.
Table 1 bandwidth requirements and priorities of all beams
According to the method provided by the present invention, a final frequency allocation plan is calculated and obtained as shown in table 2, wherein two groups of adjacent beams, i.e. beam 4 and beam 17, and beam 7 and beam 17, have frequency overlapping regions, and according to the priorities, the frequency overlapping regions of beam 4 and beam 17 are allocated to the remote users of the two beams for use because the priorities of beam 4 and beam 17 are the same; because beam 7 has a higher priority than beam 17, the frequency overlap region of beam 7 and beam 17 is allocated for use by users in beam 7.
TABLE 2 frequency Allocation scheme
Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention, and those skilled in the art can make variations and modifications of the present invention without departing from the spirit and scope of the present invention by using the methods and technical contents disclosed above.
Those skilled in the art will appreciate that those matters not described in detail in the present specification are well known in the art.
Claims (9)
1. A frequency plan adaptive adjustment method for a high-throughput satellite is characterized by comprising the following steps:
1) obtaining m beam combinations, wherein each beam combination comprises n beams; meanwhile, the bandwidth requirement and the priority of each beam are obtained according to the upper-level input; wherein n and m are positive integers;
2) obtaining different sequence permutation and combination of each wave beam combination on the same frequency spectrum, wherein n wave beam frequencies in the same wave beam combination are sequentially permuted, and the frequency intervals of the n wave beams are not overlapped;
3) for any permutation combination, according to the topological relation of the wave beams, acquiring the condition that two wave beams in all the wave beam combinations respectively belong to different wave beam combinations, the positions of the two wave beams in the topological relation are adjacent, and the frequencies have overlapping areas as a screening object;
4) for each screening object, extracting screening objects with residual frequencies in the frequency spectrum of the beam combination where the beam is located, and judging whether the frequency of the beam in the screening combination is changed to eliminate a frequency overlapping area or not, wherein a new frequency overlapping area cannot be generated by the beam adjacent to the position; if the frequency overlapping area can be eliminated, changing the frequency of the screening beams and moving the two beams out of the screening object; otherwise, directly entering the step 5);
5) obtaining the value of the overlapping area in each screening object frequency as a frequency overlapping value, and obtaining the sum of the frequency overlapping values of all the screening objects as a frequency accumulated value;
6) traversing all permutation combinations to obtain the permutation mode of the beam frequency combination corresponding to the minimum frequency accumulated value condition in the permutation combinations as a screening result;
7) and finishing the frequency allocation work of the wave beams according to the wave beam priority and the screening result input by the superior level.
2. The adaptive frequency planning adjusting method for high-throughput satellite according to claim 1, wherein: in the step 1), the value range of n is 4-8, and the value of m is greater than or equal to 6.
3. The method for frequency plan adaptive adjustment of high throughput satellite according to claim 1, wherein: and 2) the bandwidth range of the frequency spectrum is larger than or equal to 1000 MHz.
4. The adaptive frequency planning adjusting method for high-throughput satellite according to claim 3, wherein: the permutation and combination modes of each group of beams in the step 2) are common
And (4) seed preparation.
5. The adaptive frequency planning adjusting method for high-throughput satellite according to claim 4, wherein: the sum of the bandwidths of the beams in each beam combination in step 2) is less than or equal to the total bandwidth of the frequency spectrum.
6. The adaptive frequency planning adjusting method for high-throughput satellite according to claim 1, wherein: traversing all permutation and combination in step 6)
Next, the process is carried out.
7. The adaptive frequency planning adjusting method for high-throughput satellite according to claim 1, wherein: step 7), finishing the frequency allocation work of the beam according to the beam priority and the screening result input by the superior, specifically:
for two beams with different priorities in the screening result, allocating the frequency overlapping area to the beam with higher priority; and respectively allocating the frequency overlapping areas to the users at the far ends of the beams for the two beams with the same priority in the screening result.
8. A processing apparatus, comprising:
a memory for storing a computer program;
a processor for calling and running the computer program from the memory to perform the method of any of claims 2 to 7.
9. A computer-readable storage medium, having stored thereon a computer program or instructions, which, when executed, implement the method of any one of claims 2 to 7.
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