A realization method of large-scale link simulator for spatial information network

Abstract

The invention discloses a method for realizing a large-scale link simulator of a spatial information network, which includes a basic link simulator, an SDN controller and an SDN switch, wherein the SDN controller includes a bandwidth allocation module, and the basic link The simulator includes a link simulation module and a bandwidth expansion module. The link simulation module is used to realize the most basic function of simulating link characteristics, and can realize accurate simulation of multiple space links at the same time, satisfying the requirements of space information network nodes. The basic requirements for multiple link simulation; the bandwidth expansion module effectively breaks through the bandwidth limit of a single link that the link simulator can originally simulate through the SDN group table and link aggregation technology; the bandwidth allocation module integrates a bandwidth Allocation algorithm, which effectively expands the number of links supported by the link simulator. The link simulator has the characteristics of authenticity, flexibility and scalability, and can be well applied to spatial information networks.

Description

technical field [0001] The invention relates to a method for realizing a large-scale link simulator of a space information network, and belongs to the field of space information network simulation. Background technique [0002] As an important part of national infrastructure and global hot research field, spatial information network has received extensive attention. It has the advantages of wide communication coverage area, strong broadcasting capability, small terrain impact, and quick networking. [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 increase in the number of satellite nodes and the increase in the demand for network services, the network scale of the space information network is also becoming larger and larger. The existing research work shows that 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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