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Switch-over protection method of link between satellites

A satellite and link technology, which is applied in the field of switching and protecting satellite inter-satellite links by establishing a backup path, can solve the problems of cost, high cost, multiple backup resources, etc., and achieve the goal of reducing the number and improving the utilization rate Effect

Inactive Publication Date: 2007-07-18
BEIHANG UNIV
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  • Summary
  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

Although this type of method can solve the problem of network and service performance degradation caused by inter-satellite link switching, it needs to consume more backup resources, and the cost is often very high, so it cannot be effectively applied to satellite networks with expensive resources.

Method used

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  • Switch-over protection method of link between satellites
  • Switch-over protection method of link between satellites
  • Switch-over protection method of link between satellites

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Embodiment Construction

[0024] Referring to Fig. 3, it is the flowchart of the switching protection method of inter-satellite link of the present invention, comprises the following steps:

[0025] Step 1, generate a service path according to the service request of the terminal; Let the service be η, after the service request of η received by the satellite node, utilize the corresponding QoS routing algorithm to obtain the service path, set the service path as U;

[0026] Step 2. Calculate the outage probability of each link in the service path, and select a protection link that requires outage protection according to the outage probability. The protection link is represented by e(i, j), where i, j is a switching node, where node i is relatively close to the source node on the service path relative to j. This step can specifically be: calculate the interruption probability of each link in the service path, find out the link with the highest interruption probability as the protection link, and generate...

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Abstract

This invention provides a switch protection method for links among satellites including: 1, generating service paths according to the service requirement of a terminal, 2, computing the interruption probability of each link in the service routes to select protection links for interruption protection, 3, setting up switch protection backup route between two switch nodes in the protection link, 4, when the protection link switches paths, it switches the current service between two nodes to said back up path. This invention applies a mode of resuming protection locally to recover the interrupted paths because of switch quickly to guarantee the durative of service communication and that related QoS target will not be broken.

Description

technical field [0001] The invention relates to a switching protection method for satellite inter-satellite links, in particular to a switching protection method for satellite inter-satellite links by establishing backup paths. Background technique [0002] Due to the low satellite altitude, low-orbit satellites have the advantages of low transmission delay, simple user terminal implementation and low power consumption, efficient frequency multiplexing and high bandwidth links. But also bring some unfavorable influences to communication at the same time: such as the area that single satellite can cover is limited, sustainable communication time is short etc. , the maximum sustainable communication time for a user on the ground is only 10 minutes). In view of this situation, the most effective solution at present is to achieve seamless coverage of users through "satellite relay", and at the same time use inter-satellite link technology to form a network of multiple satellite...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/185H04B7/14
Inventor 张涛张军郭欣
Owner BEIHANG UNIV
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