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Link switching management method for LEO satellite network based on link residual time

A technology of remaining time and management method, applied in the field of satellite communication, can solve problems such as data packet loss, and achieve the effect of avoiding loss, reducing packet loss rate, and improving throughput

Active Publication Date: 2016-12-14
XI AN JIAOTONG UNIV
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Problems solved by technology

[0006] The purpose of the present invention is to provide a kind of LEO satellite network link switching management method based on the remaining time of the link, which solves the problem of data packet loss caused by link interruption when the link is switched in the low-earth orbit satellite network, and improves Improve the throughput of satellite network communication, reduce the packet loss rate, and ensure a high quality of service

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  • Link switching management method for LEO satellite network based on link residual time
  • Link switching management method for LEO satellite network based on link residual time
  • Link switching management method for LEO satellite network based on link residual time

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Embodiment Construction

[0030] The present invention will be further described below in conjunction with drawings and embodiments.

[0031] A low-earth orbit satellite link switching management mechanism based on the remaining time of the link, the specific introduction is as follows:

[0032] The satellite link that the present invention relates to refers to figure 1 , the studied constellation is a polar-orbit satellite constellation similar to the Iridium system. Each satellite is connected to up to four other satellites in the constellation, two in the same orbit and two in adjacent orbits. Links in link handover refer to links between low-Earth orbit satellites belonging to the same constellation. Link switching mainly occurs in two cases, one is that when two satellites in adjacent orbits pass near the pole, the link between the two has to be temporarily interrupted because of the change of antenna direction, and the other is that In the gap between two orbits in opposite directions, frequen...

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Abstract

The invention provides a link switching management method for an LEO satellite network based on link residual time. The remaining time of each link in the LEO satellite network is obtained according to the characteristics of satellite operation. The routing table items in a satellite node is changed ahead of time by combining the delay information of a path, thus preventing loss of the data packets during a link switching process. Data packet loss ratio during link switching can be reduced and throughput of satellite network is increased.

Description

technical field [0001] The invention relates to the technical field of satellite communication, in particular to a link switching management method of a LEO satellite network based on the remaining link time. Background technique [0002] In the air-space-ground integrated network, multiple satellites in different orbits, different types, and different performances form a constellation covering the whole world. Dense joint. As the main means and means of acquiring, integrating, distributing, and processing space information or resources, the satellite network system has special advantages in meteorological forecasting, environmental and disaster monitoring, resource detection, navigation and positioning, communication broadcasting, digital cities, and digital earth. Function and role. [0003] Satellites in geostationary orbit are stationary relative to the ground, and their mobility management is very convenient, and their coverage area is also large. However, from the pe...

Claims

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Application Information

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IPC IPC(8): H04L12/703H04L12/741H04L12/751H04B7/185H04L45/28H04L45/02H04L45/74
CPCH04B7/18584H04L45/02H04L45/28H04L45/74
Inventor 曲桦赵季红岳鹏程刘熙王蒙王昆
Owner XI AN JIAOTONG UNIV
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