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Beam switching method, system and device based on low earth orbit satellite and storage medium

A beam switching, low-orbit satellite technology, applied in the field of communication, can solve the problems of inaccurate switching, low efficiency, slow beam switching speed of satellite terminals, etc., to increase network search efficiency, improve efficiency, and reduce link acquisition and tracking. the difficult effect of

Active Publication Date: 2020-07-03
BEIJING SPREADTRUM HI TECH COMM TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a method for beam switching based on low-orbit satellites in order to overcome the defects of slow beam switching speed, low efficiency and inaccurate switching of satellite terminals in low-orbit satellite systems in the prior art , systems, equipment and storage media

Method used

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  • Beam switching method, system and device based on low earth orbit satellite and storage medium
  • Beam switching method, system and device based on low earth orbit satellite and storage medium
  • Beam switching method, system and device based on low earth orbit satellite and storage medium

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Embodiment 1

[0080] This embodiment provides a beam switching method based on a low-orbit satellite, and the beam switching method is applied to a satellite terminal, such as figure 1 As shown, the beam switching method includes:

[0081] Step 101, obtaining ephemeris information of low-orbit satellites.

[0082] Step 103, according to the ephemeris information and the geographic location information of the satellite terminal, acquire the target beam to be switched and the target time when the switch occurs.

[0083] Step 104, switch to the target beam at the target time.

[0084] Step 105. Select the strongest adjacent beam with the strongest signal quality of the target beam.

[0085] Step 106, switch to the strongest adjacent beam.

[0086] Among them, the ephemeris information includes the serial number of the satellite, the period number of the satellite data, the eccentricity of the satellite orbit, the rate of change of the inclination of the satellite orbit, the square root of t...

Embodiment 2

[0131] This embodiment provides a beam switching method based on low-orbit satellites, and this embodiment is a further improvement on Embodiment 1, such as Figure 4 As shown, step 103 includes:

[0132] Step 1031, acquire the target beam to be switched according to the ephemeris information and the geographic location information of the satellite terminal.

[0133] Step 1032, calculating the shortest distance from the satellite terminal to the coverage area of ​​the target beam.

[0134] Step 1033: Predict the target time for handover according to the shortest distance and the flight speed of the low-orbit satellite.

[0135] Figure 5 The beam coverage diagram of the low-orbit satellite in the present embodiment is shown, the low-orbit satellite system in the present embodiment includes several low-orbit satellites 10, and the beam coverage of a certain low-orbit satellite 10 is the beam coverage 11, the beam coverage 12 . . . the beam coverage range 13 , and the beam co...

Embodiment 3

[0139] This embodiment provides a beam switching method based on low-orbit satellites, and this embodiment is a further improvement on Embodiment 2, such as Figure 7 As shown, after step 103, it also includes:

[0140] Step 301 , judging whether there are multiple target beams, if yes, execute step 302 , if not, execute step 104 .

[0141] Step 302, respectively calculating the shortest distance from the satellite terminal to each of the target beam coverage areas.

[0142] Step 303. Predict a number of first moments when switching occurs according to each of the shortest distances and the flight speed of the low-orbit satellite.

[0143] Step 304, selecting the earliest time among the plurality of first times as the target time and selecting the target beam corresponding to the target time as the target beam to be switched.

[0144] Figure 8 The schematic diagram of the beam coverage of the low-orbit satellite in this embodiment is shown. The low-orbit satellite system i...

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Abstract

The invention discloses a beam switching method, system and device based on a low earth orbit satellite and a storage medium, and the method is applied to a satellite terminal, and comprises the steps: obtaining the ephemeris information of the low earth orbit satellite; according to the ephemeris information and the geographic position information of the satellite terminal, obtaining a target beam to be switched and a target moment when switching occurs; switching to the target beam at a target moment; selecting the strongest adjacent beam with the strongest signal quality of the target beam;and switching to the strongest adjacent beam. According to the invention, switching parameters are flexibly configured according to the position information and ephemeris information of the satelliteterminal; the wave beam becomes a target wave beam more easily; and switching the beam to the target beam according to the switching moment, according to the invention, the switching accuracy is improved, the switching accuracy and the strongest beam reservation time are also improved by selecting and residing in the strongest adjacent beam under the target beam, the difficulty of link capture and tracking caused by Doppler frequency shift is reduced, the beam switching efficiency is improved, and the network searching efficiency of the satellite terminal is improved.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a method, system, device and storage medium for beam switching based on low-orbit satellites. Background technique [0002] Traditional high-orbit satellite systems are mostly geostationary satellites. Because they are always stationary relative to the ground, the coverage of fixed multi-beam antennas on high-orbit satellites is also fixed, similar to the ground cellular communication system. Under the high-orbit satellite system, the frequency of beam switching is less. For mobile communication terminals, beam switching can be implemented with reference to ground technology. Therefore, most related technologies for beam switching use terminal position movement as the main reference criterion. [0003] The low-orbit satellite is generally a non-stationary orbit satellite, which is moving relative to the ground and its attitude changes with time. The coverage wave position ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/185H04B7/195
CPCH04B7/18513H04B7/195
Inventor 郭尊礼李忻朱勇旭张伟强
Owner BEIJING SPREADTRUM HI TECH COMM TECH CO LTD
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