Implementation method of spatial information network large-scale link simulator

Abstract

The invention discloses an implementation method of a spatial information network large-scale link simulator. The system comprises a basic link simulator, an SDN controller and an SDN switch, whereinthe SDN controller comprises a bandwidth allocation module, the basic link simulator comprises a link simulation module and a bandwidth expansion module, and the link simulation module is used for realizing the most basic function of simulating link characteristics and simultaneously realizing accurate simulation of a plurality of spatial links so as to meet the basic requirements of simulation ofa plurality of links among spatial information network nodes; the bandwidth extension module effectively breaks through the bandwidth upper limit of a single link originally simulated by a link simulator through an SDN group table and a link aggregation technology; a bandwidth allocation algorithm is integrated in the bandwidth allocation module, the number of links supported by the link simulator is effectively increased through the algorithm, and the link simulator has the advantages of being authentic, flexible, extensible and the like and can be well applied to a spatial information network.

Description

technical field [0001] The invention relates to a method for realizing a large-scale link simulator of a space information network, which belongs to the field of space information network simulation. Background technique [0002] As an important part of national infrastructure and global hotspot research fields, spatial information network has received extensive attention. It has the advantages of wide communication coverage area, strong broadcasting capability, small terrain impact, and fast networking, etc. It can be a supplement and extension of the ground network, and together with the ground network form a space-ground integrated network with global seamless coverage. [0003] Compared with the terrestrial network, the transmission link of the space information network has the characteristics of long propagation delay, high bit error rate and easy interruption of the link. And with the development of space technology, the growth of the number of satellite nodes and the...

AI Technical Summary

Problems solved by technology

First of all, the functions implemented by some link simulators are relatively single, and can only simulate the link characteristics of a single link under the condition of point-to-point communication at the same time, and cannot satisfy the link characteristics of multiple links at the same time.

Secondly, although some link simulators can simulate the link characteristics required for multiple link communications, when the number of links in the network increases, the accuracy of the link simulator cannot be guaranteed, and the simulated delay and loss Link characteristics such as packets are often far from the actual value

For other link simulators, although the required delay and packet loss can be simulated in the case of a large number of links, the maximum bandwidth it can support is limited

In addition, some link simulators can only realize the simulation of a single or individual link characteristics, and cannot take into account the simulation of comprehensive link characteristics at the same time.

Finally, although some link simulators have good simulation results, the implementation cost is too high to be widely used

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