CN110445528A - A kind of across gateway station feeding link switching method of satellite switching limitation and unloading based on user - Google Patents
A kind of across gateway station feeding link switching method of satellite switching limitation and unloading based on user Download PDFInfo
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- CN110445528A CN110445528A CN201910675491.2A CN201910675491A CN110445528A CN 110445528 A CN110445528 A CN 110445528A CN 201910675491 A CN201910675491 A CN 201910675491A CN 110445528 A CN110445528 A CN 110445528A
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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
- 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
- H04B7/18519—Operations control, administration or maintenance
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Abstract
The invention discloses a kind of across gateway station feeding link switching methods of satellite for switching limitation and unloading based on user, belong to satellite communication field；Its working principle is that: to minimize the overlay area the satellite S overlay area Zhong Danxing number of users as target, calculate the orbital position of satellite S switching；The geographic area and more star overlay areas therein covered when across the gateway station feeding link of estimation satellite S switches in advance；It limits and receives the users of other satellite services in more star areas of coverage and be switched to satellite S；The user for receiving satellite S and servicing that will be covered simultaneously in more star overlay areas by other satellites, is unloaded to other satellites；User when satellite S switches gateway station belonging to it switches gateway station simultaneously；After satellite S completes across gateway station feeding link switching, switching limitation and unloading strategy of the revocation for satellite S.The number of users for following across the gateway station feeding link switching of satellite can be minimized using the method for the present invention, promote the overall experience of user when across the gateway station feeding link of satellite switches.
Description
Technical field
The invention belongs to multimedia LEO satellite communications fields, and in particular to a kind of satellite for switching limitation and unloading based on user
Across gateway station feeding link switching method.
Technical background
With flourishing for Constellation of Low Earth Orbit Satellites, more and more LEO Satellites are carrying out construction.Low rail is defended
Across the gateway station feeding link switching problem of satellite specific to star system has become the important topic of system schema research.Especially
The LEO Satellite of satellite transparent forwarding, satellite only play covering it is primary, satellite want can be the area of coverage subscriber terminal service,
Feeding link must be established always with gateway station to connect.When across the gateway station covering of low orbit satellite high-speed motion, feeding link will be from
Source gateway station is switched to target gateway station, and the user terminal collective for receiving satellite service is caused to switch.It is advised greatly in short time
Mould user initiates switching, will generate congestion, and switching user loses serious.
Currently, being directed to the satellite feed link switching of transparent forwarding, research focuses mostly on how gateway station selects new satellite
It is attached, occurs based on load balancing, is based on longest service time, based on strategies such as bipartite graph maximum matchings.But needle
The problem of to causing a large number of users terminal to switch because of satellite feed link switching, research is more weak.
Aiming at the problem that causing a large number of users terminal collective to switch because of satellite feed link switching, need to further it provide a set of
Scheme is efficiently solved, the number of users for following satellite to switch across gateway station is reduced, reduces user's switching cutting off rate, promote satellite
System user overall experience under across gateway station feeding link switch instances.
Summary of the invention
In order to solve the problems, such as that satellite feed link switching causes a large number of users terminal to switch, the invention proposes a kind of bases
Switch across the gateway station feeding link switching method of satellite of limitation and unloading in user, method basic thought will be needed across gateway
Stand switching satellite star under in the area of coverage single star overlay area minimize (number of users), while connecing wherein more star areas of coverage
Other satellites are gradually unloaded to by the user of satellite service, and are limited for the user for receiving other satellite services, are avoided
It is switched to present satellites.
The invention proposes it is a kind of based on user switch limitation and unloading across the gateway station feeding link switching method of satellite,
As shown in Figure 1, the implementation process component part of this method includes: across the gateway station feeding link switching position for meeting optimal conditions
It calculates 1, estimate the terrestrial coverage area and more star overlay areas therein when across the gateway station feeding link of satellite S switches in advance
2, user switches limitation 3, user unloads 4, single star area of coverage user and follows across the gateway station switching 5 of satellite, revocation for satellite S's
Switching limitation and unloading strategy 6.
Technical solution of the present invention is a kind of across gateway station feeding link switching of the satellite for switching limitation and unloading based on user
Method, this method comprises:
Step 1: single in the overlay area satellite S to minimize in source gateway station and target gateway station overlapping coverage area
Number of users is target in star overlay area, is calculated based on ephemeris, source gateway station and target gateway station location, user distribution rate
The orbital position of across the gateway station feeding link switching of satellite S；
Step 2: source gateway station precomputes satellite S in the earth coverage area of across gateway station feeding link switching position
Domain, and calculate more star coverage areas in the overlay area；
Step 3: user switches limitation
For the user for receiving other satellite services in more star overlay areas described in step 2, limitation is switched over, this
Class user just switches to satellite S when will only be covered by satellite S；
Step 4: user unloads strategy
It is same by satellite S and other satellites for the user for receiving satellite S service in more star overlay areas described in step 2
When cover, select other satellites to switch over, user be unloaded to other satellites；
Step 5: across the gateway station feeding link switching of satellite S, single star overlay area user collective under satellite S covering follow
Satellite S is switched to target gateway station across gateway station；
Step 6: after satellite S completes across gateway station feeding link switching, revocation switches limitation for the user of satellite S and uses
Family unloading strategy.
Further, user distribution rate in the step 1 refers in unit area coverage and keeps connection status with gateway station
Number of users, the belt-like zone user situation covered by gateway station to satellites all in the orbital plane where satellite S carries out
Statistics obtains, and data regularly update, and different geographic regions different time sections user distribution rate is different.
Further, the calculation method of the step 1 Satellite S switching position are as follows:
Step 1.1: determining that satellite S can be believed by source simultaneously according to based on ephemeris, source gateway station and target gateway station location
The orbital position section of Guan Zhanyu target gateway station covering；
Step 1.2: the region covered on the section with certain step-length mobile-satellite S calculates each satellite S area of coverage
Number of users in the overlay area Zhong Duoxing of domain；
Step 1.3: select number of users it is minimum when corresponding satellite S where orbital position, as satellite S is across gateway
The orbital position of feeding link of standing switching.
Further, the step 1 Satellite S across gateway station feeding link handoff path position has following characteristic: In
During the entire process of satellite S slips over source gateway station and target gateway station overlapping coverage area, covered under the star of satellite S in the position
The number of users of the region overlay area Zhong Danxing is minimum.
Further, user unloads in the step 4, with the movement of satellite, the clothes of reception satellite S described in step 4
The user of business is gradually unloaded to other satellites, and the user for receiving satellite S service in more star overlay areas described in step 2 gradually subtracts
Few, until the region, all users are unloaded.
Further, user unloads and selects other satellites in the step 4, and the select of satellite strategy is in other satellites
Preferential selection belongs to the satellite of identical gateway station with satellite S.Selection belongs to the satellite of identical gateway station with satellite S, then executes
Be inter-satellite handover in gateway station, shorter compared with across gateway station handover delay, user experience is more preferable.
A kind of across gateway station feeding link switching method of satellite for switching limitation and unloading based on user of the present invention, relative to
Existing technology have it is below the utility model has the advantages that
The present invention is by calculating the number of users of single star overlay area in star lower overlay area at least corresponding orbital position
As across the gateway station feeding link switching point of satellite, the number of users for following across the gateway station feeding link switching of satellite is minimized.
The present invention implements switching limitation for the variety classes user of more star overlay areas in star lower overlay area, user unloads
It carries, effectively reduces the number of users for following satellite collective to be switched to target gateway station, alleviate switching pressure, reduce conversation loss
Rate.
The method of the present invention effectively solves user's switching problem under across the gateway station clock star of satellite, suitable for various constellation configurations
LEO Satellite has engineering application value.
Detailed description of the invention
Fig. 1 is across the gateway station feeding link switching method signal of satellite for switching limitation and unloading the present invention is based on user
Figure.
Fig. 2 is that across the gateway station feeding link switching implementation process of satellite for switching limitation the present invention is based on user and unloading is shown
It is intended to.
Fig. 3 is that single star overlay area area minimizes schematic diagram under case study on implementation SSO (Sun Synchronous Orbit) constellation Satellite S.
Fig. 4 is that case study on implementation user switches limitation and uninstall process schematic diagram.
Specific embodiment
Invention will be further explained below with reference to the drawings and examples..
The invention proposes it is a kind of based on user switch limitation and unloading across the gateway station feeding link switching method of satellite,
As shown in Figure 1, this method component part include: meet optimal conditions across gateway station feeding link switching position calculate 1, in advance
Estimate the terrestrial coverage area and more star overlay areas 2 therein, user's switching when across the gateway station feeding link of satellite S switches
Limitation 3, user's unloading 4, single star area of coverage user follow across the gateway station switching 5 of satellite, revocation limited for the switching of satellite S and
Unloading strategy 6.
In order to illustrate across the gateway station feeding link switching method of satellite for switching limitation and unloading based on user, with SSO (Sun Synchronous Orbit) star
Seat, user are uniformly distributed for situation, refering to Fig. 3,4.Specific processing step (refering to Fig. 2) is as follows:
Step 1: in source gateway station and target gateway station overlapping coverage area, ephemeris, source gateway erect-position based on satellite S
It sets, target gateway station location calculates the minimum corresponding orbital position of number of users in the overlay area Zhong Danxing of the overlay area satellite S.
Since user is uniformly distributed, the minimum corresponding orbital position of the overlay area the satellite S overlay area Zhong Danxing area need to be only calculated.Again
It is constant with orbital plane satellite covering overlapping region area because constellation is SSO (Sun Synchronous Orbit) constellation, as latitude increases different orbital plane satellite
Covering overlapping region area becomes larger, and corresponding list star overlay area area becomes smaller, shown in Figure 3.Therefore, satellite S is across gateway
The optimal trajectory position of feeding link of standing switching is the high latitude position of source gateway station and target gateway station overlapping coverage area, such as
The position O ' in Fig. 3.
Step 2: in conjunction with the ephemeris and switching position of satellite #1, satellite #2, satellite #3 and satellite #4, estimating satellite in advance
S reach feeding link switching position when, the coverage area (dotted ellipse part in Fig. 4) of satellite S and with adjacent satellite #1, defend
The region (perimeter of " mouth " type in Fig. 4) that star #2, satellite #3 and satellite #4 are overlapped, it is shown in Figure 4.
Step 3: for the overlapping region described in step 2, being performed simultaneously user and switch limitation and user's unloading, in satellite
In moving process, the user for being switched to satellite S through user's switching limitation is also required to participating user's uninstall process.User switches limitation
For step 4 to step 6, user's unloading is step 7 to step 9.
Step 4: the user of the other satellites of receiving (satellite #1,2, the 3,4) service in more star overlay areas keeps receiving to work as
Preceding satellite service；
Step 5: judging whether user terminal will leave serving satellite coverage area, if will leave, execute step
Rapid 6；Otherwise return step 4；
Step 6: judging whether user terminal will only be covered by satellite S, if will only be covered by satellite S, execute
Step 7；Otherwise return step 4；
Such as the terminal B in Fig. 4, receives satellite #3 service, i.e., will leave satellite #3 coverage area, while will be only by satellite
S covering, terminal B are switched to satellite S from satellite #3；Terminal C receives satellite #3 service, will not also be from although being covered by satellite S
Satellite #3 covering is opened, therefore continues to receive satellite #3 service.
Step 7: the user for receiving satellite S service in more star overlay areas keeps receiving present satellites service；
Step 8: judging user whether in other satellites (satellite #1,2,3,4) coverage area, if so, thening follow the steps
9, otherwise return step 7；
Step 9: judging whether there is satellite to belong to current gateway station in other satellites, if it is, choosing belongs to current gateway
The satellite stood executes across star switching in gateway station as target satellite；Otherwise it selects one of satellite as target satellite, holds
Row is across across the star switching of gateway station；
Such as the terminal A in Fig. 4, receive satellite S service, is in the coverage area of satellite S, #1, #4, Satellite #1 ownership
In source gateway station, satellite #4 belongs to target gateway station, therefore terminal A preferentially selects satellite #1 to be unloaded, out of gateway station
Satellite S is switched to satellite #1.
Step 10: judging whether satellite S reaches across gateway station feeding link handoff path position, if so, executing step
11；Otherwise return step 3；
Step 11: the user terminal of single star overlay area described in step 2 follows satellite S collective to be switched to target gateway
It stands；
Step 12: switching limitation and unloading strategy of the revocation for satellite S particular coverage.
The embodiment of the present invention has been described in detail above, and specific embodiment used herein carries out the present invention
It illustrates, the above description of the embodiments is only used to help understand the method and apparatus of the present invention；Meanwhile for the one of this field
As technical staff, according to the thought of the present invention, there will be changes in the specific implementation manner and application range, to sum up institute
It states, the contents of this specification are not to be construed as limiting the invention.
Claims (6)
1. a kind of across gateway station feeding link switching method of satellite for switching limitation and unloading based on user, this method comprises:
Step 1: in source gateway station and target gateway station overlapping coverage area, being covered with minimizing single star in the overlay area satellite S
Number of users is target in cover area, calculates satellite based on ephemeris, source gateway station and target gateway station location, user distribution rate
The orbital position of across the gateway station feeding link switching of S；
Step 2: source gateway station precomputes satellite S in the terrestrial coverage area of across gateway station feeding link switching position, with
And calculate more star coverage areas in the overlay area；
Step 3: user switches limitation
For the user for receiving other satellite services in more star overlay areas described in step 2, limitation, this kind of use are switched over
Family just switches to satellite S when will only be covered by satellite S；
Step 4: user unloads strategy
It is covered simultaneously for the user for receiving satellite S service in more star overlay areas described in step 2 by satellite S and other satellites
Lid, selects other satellites to switch over, user is unloaded to other satellites；
Step 5: across the gateway station feeding link switching of satellite S, single star overlay area user collective under satellite S covering follow satellite
S is switched to target gateway station across gateway station；
Step 6: after satellite S completes across gateway station feeding link switching, revocation switches limitation for the user of satellite S and user unloads
Carry strategy.
2. a kind of across gateway station feeding link switching side of satellite for switching limitation and unloading based on user as described in claim 1
Method, it is characterised in that user distribution rate in the step 1 refers to the use for keeping connection status in unit area coverage with gateway station
Amount mesh is counted by the belt-like zone user situation that gateway station covers satellites all in the orbital plane where satellite S
It obtains, data regularly update, and different geographic regions different time sections user distribution rate is different.
3. a kind of across gateway station feeding link switching side of satellite for switching limitation and unloading based on user as described in claim 1
Method, it is characterised in that the step 1 Satellite S across gateway station feeding link handoff path position has following characteristic: in satellite S
During the entire process of slipping over source gateway station and target gateway station overlapping coverage area, the star lower overlay area of satellite S in the position
The number of users of middle list star overlay area is minimum.
4. a kind of across gateway station feeding link switching side of satellite for switching limitation and unloading based on user as described in claim 1
Method, it is characterised in that user unloads in the step 4, with the movement of satellite, the service of reception satellite S described in step 4
User is gradually unloaded to other satellites, and the user for receiving satellite S service in more star overlay areas described in step 2 gradually decreases, directly
To the region, all users are unloaded.
5. a kind of across gateway station feeding link switching side of satellite for switching limitation and unloading based on user as described in claim 1
Method, it is characterised in that user, which unloads, in the step 4 selects other satellites, and the select of satellite strategy is preferential in other satellites
Selection belongs to the satellite of identical gateway station with satellite S.
6. a kind of across gateway station feeding link switching side of satellite for switching limitation and unloading based on user as claimed in claim 2
Method, it is characterised in that the calculation method of the step 1 Satellite S switching position are as follows:
Step 1.1: determining that satellite S can be simultaneously by source gateway station according to based on ephemeris, source gateway station and target gateway station location
With the orbital position section of target gateway station covering；
Step 1.2: the region covered on the section with certain step-length mobile-satellite S calculates in the overlay area each satellite S
Number of users in more star overlay areas；
Step 1.3: select number of users it is minimum when corresponding satellite S where orbital position, as across the gateway station feedback of satellite S
The orbital position of electric link switching.
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| CN111262616A (en) * | 2020-01-15 | 2020-06-09 | 广州爱浦路网络技术有限公司 | User data switching device and switching method for low-orbit satellite gateway station |
| CN111314981A (en) * | 2020-02-20 | 2020-06-19 | 北京华力创通科技股份有限公司 | Terminal reselection method and device for feeder link switching |
| CN112671448A (en) * | 2020-12-09 | 2021-04-16 | 中国电子科技集团公司第五十四研究所 | Cross-satellite switching method for feeder link in low-earth-orbit satellite mobile communication system |
| CN113099495A (en) * | 2020-01-09 | 2021-07-09 | 大唐移动通信设备有限公司 | Gateway station conversion method, device, terminal and gateway station |
| CN113260005A (en) * | 2020-02-13 | 2021-08-13 | 华为技术有限公司 | Gateway station switching method and device |
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| CN113489530A (en) * | 2021-07-26 | 2021-10-08 | 南京熊猫汉达科技有限公司 | Method for synchronously switching feeder links in low-earth-orbit constellation satellite communication system |
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| CN113099495B (en) * | 2020-01-09 | 2022-04-15 | 大唐移动通信设备有限公司 | Gateway station conversion method, device, terminal and gateway station |
| CN113099495A (en) * | 2020-01-09 | 2021-07-09 | 大唐移动通信设备有限公司 | Gateway station conversion method, device, terminal and gateway station |
| CN111262616B (en) * | 2020-01-15 | 2020-11-13 | 广州爱浦路网络技术有限公司 | User data switching device and switching method for low-orbit satellite gateway station |
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| CN111314981A (en) * | 2020-02-20 | 2020-06-19 | 北京华力创通科技股份有限公司 | Terminal reselection method and device for feeder link switching |
| WO2021175067A1 (en) * | 2020-03-03 | 2021-09-10 | 华为技术有限公司 | Gateway station switching method and apparatus |
| CN113543149A (en) * | 2020-04-17 | 2021-10-22 | 中国电信股份有限公司 | Control method, device, system and storage medium for establishing feeder link |
| CN113543149B (en) * | 2020-04-17 | 2023-03-28 | 中国电信股份有限公司 | Control method, device, system and storage medium for establishing feeder link |
| WO2022061664A1 (en) * | 2020-09-24 | 2022-03-31 | Oppo广东移动通信有限公司 | Transmission control method and apparatus, device, and storage medium |
| CN112671448A (en) * | 2020-12-09 | 2021-04-16 | 中国电子科技集团公司第五十四研究所 | Cross-satellite switching method for feeder link in low-earth-orbit satellite mobile communication system |
| CN113472424A (en) * | 2021-06-30 | 2021-10-01 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | Different-frequency measurement switching device for ephemeris-assisted flexible switch multi-satellite coverage area |
| CN113489530A (en) * | 2021-07-26 | 2021-10-08 | 南京熊猫汉达科技有限公司 | Method for synchronously switching feeder links in low-earth-orbit constellation satellite communication system |
| CN113489530B (en) * | 2021-07-26 | 2022-08-19 | 中电防务科技有限公司 | Method for synchronously switching feeder links in low-earth-orbit constellation satellite communication system |
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