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Satellite network routing method, equipment and device

A satellite network and satellite link technology, applied in the field of communications, can solve problems such as network congestion, network paralysis, and disconnection, and achieve the effect of preventing network congestion and avoiding serious problems.

Active Publication Date: 2019-09-10
CHINA UNITED NETWORK COMM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, in today's satellite network routing protocols, most routing protocols use the shortest path to plan routing from the perspective of application, so that all business data forwarding takes the shortest path. When the forwarding business is heavy, it is easy to Cause network congestion, or exacerbate network congestion, and eventually lead to network paralysis
[0003] Moreover, as the application scenarios of the satellite network become more and more extensive, the traffic in the network is also increasing, and it is difficult to maintain after the satellite network nodes are in the air. Whether it is centralized routing or distributed routing, the network forwarding nodes simply rely on the shortest path method The obtained routing table forwards data. Once there is link congestion or link interruption in the network, the entire forwarding network is unable to deal with it.
For example, in the SGRP routing protocol, the high-level MEO (Medium Earth Orbit, medium earth orbit) satellite acts as a centralized control terminal to calculate the routing table for the low-level LEO (low earth orbits, low earth orbit) satellite in each snapshot cycle, and the data is completely provided by the LEO Satellites carry out forwarding, and once a MEO satellite fails, it will directly cause all LEO satellites within the coverage of this MEO satellite to be disconnected from the network, and in severe cases, the entire network will be paralyzed

Method used

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  • Satellite network routing method, equipment and device
  • Satellite network routing method, equipment and device

Examples

Experimental program
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Effect test

Embodiment 1

[0055] Such as figure 1 As shown, this embodiment provides a satellite network routing method, which is applied to LEO satellites, and the method includes:

[0056] S11, receiving the first routing table and the second routing table calculated by the MEO satellite;

[0057] S12. Use different routing tables to forward data according to different service types of data packets: if the service type is delay-sensitive, use the first routing table to forward data packets; if the service type is bandwidth-sensitive, use the second routing table. The routing table forwards the packets.

[0058] Optionally, the method further includes: if the MEO satellite to which it belongs fails, switching to a new MEO satellite to belong to, and then performing steps S11-S12.

[0059] In this embodiment, there are two ways for MEO satellites to manage LEO satellites. The first way is that within one time slice, one MEO satellite manages multiple LEO satellites, and the MEO layer satellites are u...

Embodiment 2

[0064] This embodiment provides a satellite network routing method, which is applied to MEO satellites, and the method includes:

[0065] S21. Calculate the first routing table and the second routing table;

[0066] Wherein, the step of calculating the first routing table specifically includes:

[0067] S211, collecting link delay data of all LEO layer satellites and MEO layer satellites;

[0068] S212, calculate and obtain the first routing table by using the shortest path algorithm according to the time delay data of all LEO layer satellite links;

[0069] In this embodiment, the MEO layer satellites calculate the first routing table and the second routing table as the centralized control layer of the network. In each time slice, the MEO satellites collect the link time delay data of all LEO layer satellites and MEO layer satellites, specifically The process is as follows: Each MEO satellite and LEO satellite summarizes the link delay data of all satellite nodes connected ...

Embodiment 3

[0099] This embodiment provides a LEO satellite device, which includes a memory and a processor, the memory stores instructions, and the processor runs the instructions to execute the network routing method applied to the LEO satellite.

[0100] Wherein, the memory is electrically connected with the processor, the memory can be a flash memory or a read-only memory or other memory, and the processor can be a central processing unit or a single-chip microcomputer.

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Abstract

The invention discloses a satellite network routing method applied to an LEO satellite, and the method comprises the steps: S11, receiving a first routing table and a second routing table calculated by the MEO satellite; S12, respectively using different routing tables to forward data according to different service types of the data packet: if the service type is a delay sensitive type, using thefirst routing table to forward the data packet; and if the service type is a bandwidth sensitive type, forwarding the data packet by using the second routing table. Furthermore, the invention also discloses satellite network routing equipment and a satellite network routing device. Therefore, different service types are enabled to balance the flow in the LEO layer network, and the forwarding function of the MEO layer satellite is dynamically expanded. Network congestion can be prevented, meanwhile, the forwarding network has the coping capacity under the condition of congestion or faults, anda series of serious problems generated under the condition of network congestion or faults in the prior art are avoided.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a satellite network routing method, equipment and device. Background technique [0002] Today's satellite network routing protocols can be roughly divided into centralized routing protocols and distributed routing protocols. Centralized routing protocol, whether it is the ground station as the centralized control terminal or the high-level satellite as the centralized control terminal, the main idea is to use the periodicity and predictability of the satellite network to divide the satellite network topology cycle into multiple time slices, In a time slice, the satellite topology remains unchanged, and the routing table is calculated for the data forwarding network in the form of the shortest path. The distributed routing protocol uses the periodicity and structural characteristics of the satellite network topology, and each node independently calculates the next ...

Claims

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Application Information

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IPC IPC(8): H04L12/741H04L12/703H04L12/725H04L12/803H04B7/185H04L45/74H04L45/28
CPCH04L45/54H04L45/306H04L47/125H04B7/18519H04L45/28H04B7/18584
Inventor 韩江雪
Owner CHINA UNITED NETWORK COMM GRP CO LTD
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