CN112671448A - Cross-satellite switching method for feeder link in low-earth-orbit satellite mobile communication system - Google Patents
Cross-satellite switching method for feeder link in low-earth-orbit satellite mobile communication system Download PDFInfo
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- CN112671448A CN112671448A CN202011424930.1A CN202011424930A CN112671448A CN 112671448 A CN112671448 A CN 112671448A CN 202011424930 A CN202011424930 A CN 202011424930A CN 112671448 A CN112671448 A CN 112671448A
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Abstract
The invention discloses a cross-satellite switching method for a feeder link in a low-earth-orbit satellite mobile communication system, and belongs to the technical field of low-earth-orbit satellite mobile communication. The method provides a method for integrally moving the communication context to complete the feed link star-crossing switching, the feed link star-crossing switching is completed through the integral moving of the communication context, the problem of time efficiency of the feed star-crossing switching under the condition of large user quantity can be effectively solved, and the feed star-crossing switching is transparent to the terminal.
Description
Technical Field
The invention relates to a cross-satellite switching method for a feeder link in a low-earth-orbit satellite mobile communication system, belonging to the technical field of low-earth-orbit satellite mobile communication.
Background
In a low earth orbit satellite mobile communication system, the satellite moves along a predetermined orbit at a high speed, and frequent switching of the feeder link between the satellite and the gateway station occurs, that is, the feeder link of the same satellite is frequently switched from one gateway station to the next adjacent gateway station. Accordingly, the satellite terminal under the satellite frequently performs the camping handover between two gateway stations.
According to the traditional mobility management process, after a base station where a terminal resides is changed, the terminal or a network side can initiate a service switching process. If the mobility management of the low-earth-orbit satellite mobile communication system refers to the traditional processing mode, the terminal under the satellite with the power feed switching will frequently perform the service switching process, which not only affects the use efficiency of the terminal, but also affects the utilization rate of the air interface resources of the system.
Disclosure of Invention
In view of this, the present invention provides a method for cross-satellite switching of a feeder link in a low earth orbit satellite mobile communication system, which can solve the problem of information exchange between adjacent gateway stations of a base station context in the process of cross-satellite switching of the feeder of the low earth orbit satellite mobile communication system, and achieve the effects of reducing air interface signaling overhead and improving system operation efficiency.
The purpose of the invention is realized as follows:
a method for switching over satellites of a feeder link in a low-earth-orbit satellite mobile communication system, wherein satellites in the low-earth-orbit satellite mobile communication system are in transparent transmission, and each satellite only has one feeder link at the same time, comprises the following steps:
(1) defining a context parameter set of a base station, each gateway station being designed on the basis of the parameter set;
(2) before a satellite feeder link is switched from one gateway station to an adjacent gateway station, two gateway stations carry out synchronous negotiation to finish preparation before switching;
(3) when a satellite feed link is switched from one gateway station to an adjacent gateway station, the whole context information of a base station in the gateway station is moved to the adjacent gateway station, and the context information is transmitted between the stations through a ground wired network, so that the insensibility of the satellite terminal to the switching process of the satellite feed link is realized;
(4) after receiving the whole context of the last gateway station base station, the adjacent gateway stations carry out context information verification and feed switching execution, and then reply the receiving and execution conditions;
the switching of the feeder link between two adjacent satellites is completed.
Compared with the prior art, the invention has the following advantages:
1. the invention provides a brand-new feed link cross-satellite switching method which can be well adapted to the scene of high-speed satellite operation of a low-orbit satellite mobile communication system.
2. The invention provides a method for integrally moving the context in the feed cross-satellite switching process based on a ground broadband transmission mode, so that the air interface signaling overhead is reduced, and the system operation efficiency is improved.
Drawings
Fig. 1 is a schematic view of a low earth orbit satellite mobile communication system cross-satellite switching scenario in an embodiment of the present invention.
FIG. 2 is a flow chart of a method of an embodiment of the present invention.
Detailed Description
The technical solution of the present invention will be further described in detail with reference to the accompanying drawings and the detailed description.
A cross-satellite switching method for a feeder link in a low earth orbit satellite mobile communication system is applied to a cross-satellite application scene of the feeder link in the low earth orbit satellite mobile communication system shown in figure 1. The scene comprises a gateway station before switching, a gateway station after switching and a low-orbit satellite, wherein the low-orbit satellite is transparently forwarded, and the gateway stations are interconnected through a ground broadband.
The flow of the method is shown in fig. 2, and comprises the following steps:
(1) defining a uniform base station context parameter set which is the basis for designing and realizing the gateway station and is also a base station context integral moving information set in the gateway station;
(2) in the process of low-earth orbit satellite motion, a gateway station triggers feed link switching according to configuration time, a source gateway station (a gateway station where feed resides before switching, namely, a gateway station A in figure 2) sends a feed cross-satellite switching request to a target gateway station (a gateway station where feed resides after switching, namely, a gateway station B in figure 2), and after receiving the request message, the target gateway station sends a feed cross-satellite switching response to the source gateway station to complete switching synchronous preparation among the gateway stations;
(3) after the synchronization is completed, the source gateway station sends a feed cross-satellite switching context to the target gateway station, and after the target gateway station receives the base station context information, the target gateway station sends a feed cross-satellite switching completion message to the source gateway station to complete the context information transmission between the gateway stations;
and completing the feed cross-satellite switching process in the low-earth-orbit satellite mobile communication system.
The method provides a method for integrally moving the communication context to complete the feed link star-crossing switching, the feed link star-crossing switching is completed through the integral moving of the communication context, the problem of time efficiency of the feed star-crossing switching under the condition of large user quantity can be effectively solved, and the feed star-crossing switching is transparent to the terminal.
In conclusion, the invention creatively provides a method for integrally moving the context information of the base station at the network side, solves the problem of cross-satellite switching of the feeder link in the low-earth orbit satellite mobile communication system, can be used in the scene of cross-satellite switching of the feeder link, and achieves the aim of quickly switching the feeder link by completing the switching of the feeder link of the same satellite from one gateway station to the next gateway station through the method for integrally moving the communication context.
Claims (1)
1. A method for switching feed links across satellites in a low-earth-orbit satellite mobile communication system is characterized in that the satellites in the low-earth-orbit satellite mobile communication system are in transparent transmission, and each satellite only has one feed link at the same time, and the method comprises the following steps:
(1) defining a context parameter set of a base station, each gateway station being designed on the basis of the parameter set;
(2) before a satellite feeder link is switched from one gateway station to an adjacent gateway station, two gateway stations carry out synchronous negotiation to finish preparation before switching;
(3) when a satellite feed link is switched from one gateway station to an adjacent gateway station, the whole context information of a base station in the gateway station is moved to the adjacent gateway station, and the context information is transmitted between the stations through a ground wired network, so that the insensibility of the satellite terminal to the switching process of the satellite feed link is realized;
(4) after receiving the whole context of the last gateway station base station, the adjacent gateway stations carry out context information verification and feed switching execution, and then reply the receiving and execution conditions;
the switching of the feeder link between two adjacent satellites is completed.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011424930.1A CN112671448A (en) | 2020-12-09 | 2020-12-09 | Cross-satellite switching method for feeder link in low-earth-orbit satellite mobile communication system |
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| CN202011424930.1A CN112671448A (en) | 2020-12-09 | 2020-12-09 | Cross-satellite switching method for feeder link in low-earth-orbit satellite mobile communication system |
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| CN112671448A true CN112671448A (en) | 2021-04-16 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114157344A (en) * | 2021-12-09 | 2022-03-08 | 成都天奥集团有限公司 | Method for supporting lossless switching of satellite feed link |
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| CN110445528A (en) * | 2019-07-25 | 2019-11-12 | 成都天奥集团有限公司 | A kind of across gateway station feeding link switching method of satellite switching limitation and unloading based on user |
| CN110602753A (en) * | 2019-07-25 | 2019-12-20 | 成都天奥集团有限公司 | Method for solving problem of frequent switching of feeder link of low-rail satellite communication system |
| 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 |
| CN111786710A (en) * | 2019-04-04 | 2020-10-16 | 电信科学技术研究院有限公司 | Switching method, communication equipment, terminal equipment and storage medium |
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- 2020-12-09 CN CN202011424930.1A patent/CN112671448A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US20160323800A1 (en) * | 2015-05-01 | 2016-11-03 | Qualcomm Incorporated | Handoff for satellite communication |
| CN107528628A (en) * | 2017-09-28 | 2017-12-29 | 中国电子科技集团公司第七研究所 | The signal synchronizing method of satellite communication system, device and system |
| CN111786710A (en) * | 2019-04-04 | 2020-10-16 | 电信科学技术研究院有限公司 | Switching method, communication equipment, terminal equipment and storage medium |
| CN110072264A (en) * | 2019-05-28 | 2019-07-30 | 重庆邮电大学 | A kind of LEO Satellite switching method |
| CN110445528A (en) * | 2019-07-25 | 2019-11-12 | 成都天奥集团有限公司 | A kind of across gateway station feeding link switching method of satellite switching limitation and unloading based on user |
| CN110602753A (en) * | 2019-07-25 | 2019-12-20 | 成都天奥集团有限公司 | Method for solving problem of frequent switching of feeder link of low-rail satellite communication system |
| CN110429975A (en) * | 2019-09-05 | 2019-11-08 | 海能达通信股份有限公司 | Satellite switching method and device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114157344A (en) * | 2021-12-09 | 2022-03-08 | 成都天奥集团有限公司 | Method for supporting lossless switching of satellite feed link |
| CN114157344B (en) * | 2021-12-09 | 2023-12-05 | 成都天奥集团有限公司 | Method for supporting lossless switching of satellite feed link |
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