Mobile communication system and method based on low-orbit satellite constellation network

A low-orbit satellite and constellation technology, applied in the field of satellite communication, to achieve the effect of large coverage and low transmission delay

Inactive Publication Date: 2016-12-21
BEIJING XINWEI TELECOM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

TCP's receive window buffer is generally 64KB, and the two-way transmission delay reaches 500-600ms, resulting in an end-to-end throughput limited to about 1Mbps

Method used

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  • Mobile communication system and method based on low-orbit satellite constellation network
  • Mobile communication system and method based on low-orbit satellite constellation network
  • Mobile communication system and method based on low-orbit satellite constellation network

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Embodiment 1: Mobile Communication System Based on LEO Satellite Constellation Network

[0043] See figure 1 , the mobile communication system includes: a satellite terminal 1, a low-orbit satellite 2, an interstellar link 5 and a network management center 6 located on the ground, wherein the low-orbit satellite 2 provides Ku / KA / laser broadband beam 3 and L / S narrowband beam4.

[0044] The IP application scenarios that the system can support are as follows: Figure 2 to Figure 5 As shown, including but not limited to: point-to-point communication, point-to-multipoint network communication, star network (Star) communication, Mesh network communication.

Embodiment 2

[0046] 1) if Figure 6 In the system shown, 1, 2, and 3 are terminal 1, terminal 2, and terminal 3 respectively; 4 is a low-orbit satellite; 5 is an interstellar link; 6 is a ground network management center; 7 is an S / L narrow-band beam; 8 For Ku / Ka / laser broadband beams.

[0047] Narrowband communication based on L / S can use TDMA, FDMA, CDMA and other general or special standards; broadband communication based on Ku / Ka can use DVB-S2 / DVB-RCS or other standards. Assuming that in the Ka band, DVB-RCS is used for uplink and DVB-S2 is used for downlink, the satellite terminal broadband service module supports IP encapsulation and forwarding processing.

[0048] 2) The satellite constellation supports global coverage, and all terminals initially access the network through S / L narrowband beams;

[0049] 3) To use broadband data services, terminal 1 first forwards the service request to the ground network management center through S / L narrowband signaling;

[0050] There are two...

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Abstract

The invention provides a mobile communication system based on a low-orbit satellite constellation network, which comprises at least one low-orbit satellite, and is characterized in that the low-orbit satellites provide L/S-band based narrowband communication and Ku/Ka-band/laser based broadband communication for users; and the system further provides inter-satellite link transmission among the plurality of low-orbit satellites when user terminals are located at different satellites. The invention further provides a corresponding communication method. According to the invention, broadband data services can be provided for the users by combining the characteristics of large coverage area of an L/S-band and high bandwidth of a Ku/Ka-band/laser.

Description

technical field [0001] The invention relates to the technical field of satellite communication, in particular to a mobile communication system and method based on a low-orbit satellite constellation network. Background technique [0002] The working frequency bands allocated by ITU for satellite communication are: L, S, C, X, Ku, Ka; on this basis, narrowband or broadband voice, data and other services are carried out. The Ka frequency band has the advantages of wide available bandwidth, less interference, and small equipment size. It is generally used for high-speed satellite communications in satellite communication systems, including high-definition television, gigabit-level broadband data transmission, and personal satellite communications. It is suitable for high-speed data transmission. business. The L and S frequency bands have the characteristics of low frequency band and wide coverage, and are generally used for voice or low-speed data services. [0003] In the cu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/185
CPCH04B7/195H04B7/18521H04B7/1853
Inventor 宋永亮辛朝磊蒋伯峰
Owner BEIJING XINWEI TELECOM TECH
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