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A satellite network rerouting method based on priority mechanism

A satellite network and priority technology, applied in data exchange network, digital transmission system, electrical components, etc., can solve the problems of limited on-board resources, consumption of on-board resources, delay and large delay jitter, etc., to reduce resources , Relieve the resource shortage on the star and shorten the fault repair time

Active Publication Date: 2016-08-17
DALIAN UNIV
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Problems solved by technology

In the satellite network, due to the long distance between satellite nodes and limited resources on the satellite, when the second type of rerouting is used, recalculation and establishment of LSP by the satellite consume more resources on the satellite, and cause delay and delay jitter bigger

Method used

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  • A satellite network rerouting method based on priority mechanism
  • A satellite network rerouting method based on priority mechanism
  • A satellite network rerouting method based on priority mechanism

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Embodiment Construction

[0017] The specific embodiments of the present invention will be described in detail below in conjunction with the technical solutions and accompanying drawings.

[0018] The satellite MPLS network is different from the terrestrial MPLS network. In the satellite MPLS network, the satellite is in high-speed motion, and the satellite network topology presents periodic changes. At present, the solutions to satellite network topology changes are mainly divided into three categories, namely time topology snapshot method, discrete geographic coordinate method and satellite topology related method.

[0019] The satellite network in the embodiment of the present invention is a low-orbit constellation network, so to solve the topology change of the satellite network, the method of scattered geographical coordinates can be used, and a unique number is set for each satellite node, and the network address is set according to the unique number. This network address can be used for routing ...

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Abstract

The present invention provides a satellite network rerouting method based on a priority mechanism, including: when a fault occurs on a key link, calculate the link repetition rate according to the minimum interference algorithm, and when the link repetition rate is less than the level parameter , select the path with the first priority, when the link repetition rate is greater than the level parameter, select the path with the second priority, when the failure occurs on a non-critical link, when there is no backup for the link on the working path In the path, the faulty node or the previous node of the link is regarded as the source node, and the faulty node or the next node of the link is regarded as the destination node. According to the shortest path algorithm, the feasible route to the destination node is directly calculated online, and then redistributed Tags, after tag redistribution is complete, enable communication. The invention reduces the resources consumed for recalculating the path when a failure occurs, and shortens the time for repairing the failure.

Description

technical field [0001] The invention belongs to the field of network routing and relates to a satellite network rerouting method based on a priority mechanism. Background technique [0002] In a multiprotocol label switching protocol (MPLS) network, rerouting is used to protect the failed link or node when the label switched path (LSP) link or node fails, so that data transmission will not happen A technique of interruption. At present, according to whether link resources need to be reserved in advance, rerouting for MPLS networks is mainly divided into two categories. The first category is the need to reserve resources, the main implementation form is link or node protection, specifically including Haskin method, Makam method and related improved methods. The other type is that there is no need to reserve resources in advance. When a label switched path (LSP) that meets the requirements of quality of service (QoS) appears or the current LSP is preempted by other higher pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/707H04L12/721H04L12/723H04L12/851H04L45/24H04L45/50
Inventor 潘成胜王登峰
Owner DALIAN UNIV
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