Combined switching method based on load balancing in low-orbit satellite communication
A satellite communication and load balancing technology, which is applied in the field of satellite communication handover, can solve the problems that the low-orbit satellite communication system cannot be applied, and channel noise interference is not considered, and achieve the effect of improving handover success rate, reducing overload, and good service quality
A satellite communication and load balancing technology, which is applied in the field of satellite communication handover, can solve the problems that the low-orbit satellite communication system cannot be applied, and channel noise interference is not considered, and achieve the effect of improving handover success rate, reducing overload, and good service quality
CN110809292AActive Publication Date: 2020-02-18BEIJING INSTITUTE OF TECHNOLOGYGY +1
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Embodiment 1
[0066] This embodiment describes the specific implementation of a joint handover method based on load balancing in low-orbit satellite communication in a low-orbit satellite communication system, such as figure 1 As shown, the entire low-orbit satellite communication system is divided into three parts: space segment, ground segment, and user segment. The user segment is a variety of mobile users; the ground segment includes the system control center, network control center, customs station, etc.; the space segment is composed of low-orbit satellites, and the low-orbit satellites communicate through communication links. The handover occurs between the low-orbit satellites in the space segment. First, it is judged whether the inter-satellite handover trigger condition is met. When the handover trigger condition is met, the target satellite is selected by the method for selecting a target satellite for multi-attribute decision-making according to the present invention. The termina...
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The invention relates to a combined switching method based on load balancing in low-orbit satellite communication, and belongs to the technical field of satellite communication switching. The method comprises the following steps: 1) judging whether an overload satellite exists or not to determine whether to trigger switching, and selecting a proper target satellite by a target satellite selectionmethod based on the signal strength of adjacent satellites received by a mobile user and multi-attribute decision of the load condition of the adjacent satellites; 2) judging whether the time when thereference signal receiving power and the reference signal receiving quality of the source satellite and the target satellite meet a switching triggering condition is greater than a time delay threshold or not to determine whether to trigger switching or not; and (3) if the step (1) and the step (2) meet the switching triggering condition, executing switching through the inter-satellite switchingsignaling process provided by the invention. The switching failure rate and the call drop rate are reduced, the probability of ping-pong switching is also reduced to a certain extent, and after switching is finished, a mobile user can obtain better service quality.
Description
Technical field [0001] The invention relates to a joint handover method based on load balance in low-orbit satellite communication, in particular to a handover method, handover procedure and handover target satellite selection method in low-orbit satellite communication, belonging to the technical field of satellite communication switching. Background technique [0002] Handover technology in satellite communication systems has always been a research hotspot. When the user is connected to the network, due to the rapid movement of the satellite relative to the ground, the mobile user’s original service satellite may be too far away from the satellite's sub-satellite point, which may weaken the user’s received signal strength. . When the signal strength received by the mobile user cannot meet the service requirements, in order to ensure the continuity of communication, the network must select another suitable satellite for the user, switch the mobile user to this satellite and esta...
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Patent Timeline
18 Feb 2020
Publication
CN110809292A
- IPC
- H04W28/08; H04W36/00; H04B7/185
- CPC
- H04B7/18519; H04W28/08; H04W36/0058
- Inventors
- 费泽松; 王统