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A terminal location management method for a low-orbit satellite network

A terminal location and management method technology, which is applied in the field of terminal location management of low-orbit satellite networks, can solve the problems of no on-board processing capability and no autonomous positioning capability of the terminal, and achieve the effect of reducing the total cost

Active Publication Date: 2022-06-03
CHONGQING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, for the position management in the low-orbit satellite network, most of the research is that the terminal has no autonomous positioning capability and no on-board processing capability.

Method used

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  • A terminal location management method for a low-orbit satellite network
  • A terminal location management method for a low-orbit satellite network
  • A terminal location management method for a low-orbit satellite network

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Experimental program
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Embodiment Construction

[0088] In the accompanying drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components; in the description of the present invention

[0089] Please refer to FIG. 1 to FIG. 8 .

[0097] γ

[0098]

[0101]|ψ(t)|=∫ωdt

[0104] In the triangle OHS in Figure 4, there are

[0105]

[0106] expanded

[0107]

[0109]

[0110] The instant t when the visible time of the satellite starts is defined as 0, and there is

[0111] cosγ(0)=cosψ(0)×cosγ

[0112]

[0114]

[0115]

[0116] in combination with various formulas to obtain

[0117]

[0119]

[0120] FIG. 5 is a schematic diagram of the beam elevation angle.

[0122]

[0125] FIG. 8 is a flow chart of the implementation of the neighbor list.

[0130] Step4: The ground station processes the information and designs a suitable neighbor list for the terminal. Ground station to check satellite ephemeris

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Abstract

The invention relates to a terminal position management method of a low-orbit satellite network, belonging to the field of low-orbit satellite communication, including: terminal position update: when the resident beam of the terminal is not in the neighbor cell list allocated by the system or the system allocates a neighbor The terminal will update the new location at the time of the area list; terminal elevation angle prediction: predict the terminal elevation angle based on the terminal’s geographic location information and the satellite’s position information for a period of time in the future; terminal adjacent cell list design: through the terminal elevation angle Prediction, combined with the satellite multi-beam antenna topology model, allocates the resident beams of the terminal, and designs a suitable neighbor list for the terminal. This method optimizes the entire satellite as a neighbor list, minimizing the overall location management overhead.

Description

A terminal location management method for a low-orbit satellite network technical field [0001] The invention belongs to the field of low-orbit satellite communications, and relates to a terminal position management method for a low-orbit satellite network. Background technique [0002] The Low Earth Orbit (LEO) satellite network is an important part of the future space-space-earth integrated network. It is a hotspot of current and future research in the field of mobile communication. The orbital altitude of low-orbit satellites is generally 200 to 2000 km. The satellite coverage time is short, about 10 minutes. Mobility management is a challenge in the field of mobile communications It mainly includes: handover management and location management. Location management involves whether paging can be successful, in mobility plays an important role in management. [0003] Location management includes two aspects, location update (Location Update) and location paging (Pag...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/185H04W64/00
CPCH04B7/18519H04W64/00Y02D30/70
Inventor 唐伦孙移星朱丹青李子煜宋艾遥陈前斌
Owner CHONGQING UNIV OF POSTS & TELECOMM