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A Joint Handover Method Based on Load Balancing in LEO 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

Active Publication Date: 2021-03-09
BEIJING INSTITUTE OF TECHNOLOGYGY +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to solve the technical defect that the traditional handover method does not consider channel noise interference and load balance and cannot be applied to the low-orbit satellite communication system, and proposes a joint handover method based on load balance in low-orbit satellite communication, which realizes the The user receives the signal strength of adjacent satellites, and the target satellite selection of multi-attribute decision-making based on the loading of adjacent satellites

Method used

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  • A Joint Handover Method Based on Load Balancing in LEO Satellite Communication
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  • A Joint Handover Method Based on Load Balancing in LEO Satellite Communication

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Embodiment 1

[0066] This embodiment describes the specific implementation of a joint switching 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: the space segment, the ground segment, and the user segment. The user segment is a variety of mobile users; the ground segment includes the system control center, network control center, gateway station, etc.; the space segment is composed of low-orbit satellites, and the low-orbit satellites communicate through communication links. Handover occurs between low-orbit satellites in the space segment. First, it is judged whether the triggering condition for inter-satellite handover is satisfied. The terminal, source satellite, target satellite and ground gateway station complete the switching process through signaling interaction.

[0067] Two conditions for inter-satellite hando...

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Abstract

The invention relates to a joint switching method based on load balancing in low-orbit satellite communication, and belongs to the technical field of satellite communication switching. Including: 1) judging whether there is an overloaded satellite to decide whether to trigger switching, and selecting a suitable target satellite by the target satellite selection method based on the signal strength of the mobile user receiving adjacent satellites and the multi-attribute decision-making of the adjacent satellite load; 2) Determine whether the time when the reference signal received power and reference signal received quality of the source satellite and the target satellite meet the handover trigger condition is greater than the time lag threshold to determine whether to trigger the handover; 3) If steps 1) and 2) meet the handover trigger condition, then Handover is performed through the inter-satellite handover signaling flow proposed by the present invention. The switching method reduces the switching failure rate and call drop rate, and also reduces the probability of ping-pong switching to a certain extent; and after the switching is completed, the mobile user can obtain better service quality.

Description

technical field [0001] The invention relates to a joint switching method based on load balancing in low-orbit satellite communication, in particular to a switching method, a switching process and a method for selecting a switching target satellite in low-orbit satellite communication, and belongs to the technical field of satellite communication switching. Background technique [0002] Handover technology in the satellite communication system 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 original serving satellite of the mobile user may be too far away from the sub-satellite point, resulting in the weakening of the received signal strength of the user. . When the signal strength received by the mobile user cannot meet the service requirements, in order to ensure the continuity of communication, the network will select another suitable satellite for the user, and switch the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W28/08H04W36/00H04B7/185
CPCH04B7/18519H04W28/08H04W36/0058
Inventor 费泽松王统张亚生蒋逸凡赵海峰刘昊昱
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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