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Physical accessing method facing QualNet network semi-physical simulation

A semi-physical simulation and access method technology, applied in the field of physical access, can solve problems such as poor scalability and flexibility, and achieve the effects of good scalability, improved use flexibility, and reduced restrictions

Inactive Publication Date: 2013-07-10
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to solve the problem of poor extensibility and flexibility of the prior art, and propose a physical object access method for QualNet network hardware-in-the-loop simulation, which can support tunnel mode and analysis mode at the same time, and does not require real nodes Make any changes, you can connect real nodes to the virtual network built by QualNet, and build a network hardware-in-the-loop simulation system, which has good scalability and flexibility

Method used

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  • Physical accessing method facing QualNet network semi-physical simulation
  • Physical accessing method facing QualNet network semi-physical simulation
  • Physical accessing method facing QualNet network semi-physical simulation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0098] 1. Use QualNet to build a virtual network, place 5 virtual nodes in the virtual network, and their topology relationship is 1-2-3-4-5. Among them, the No. 1 node and No. 5 node are respectively mapped to two real hosts connected to the simulation server in tunnel mode as LVP-V. The configuration file is as follows:

[0099] LVP YES

[0100] [1]LVP-INTERFACE[0]eth0

[0101] [1]LVP-LEVEL[0]1

[0102] [5]LVP-INTERFACE[0]eth0

[0103] [5]LVP-LEVEL[0]1

[0104] 2. Enable QualNet.

[0105] 3. Transfer files from one LVP-L to another LVP-L. In the process of file transfer, kill or activate an intermediate node (node ​​2, 3, and 4) in the virtual network, and observe that the file transfer rate changes accordingly with the change of the virtual network. It shows that the physical interface can inject and export real network traffic into and out of the virtual network, and the virtual network affects the performance of the real network traffic.

Embodiment 2

[0107] 1. Use QualNet to build a virtual network, place 5 virtual nodes in the virtual network, and their topological relationship is 1-2-3-4-5. Among them, node 3 is mapped to a real host connected to the simulation server as LVP-V in parsing mode. The configuration file is as follows:

[0108] LVP YES

[0109] [3]LVP-INTERFACE[0]eth0

[0110] [3]LVP-LEVEL[0]2

[0111] 2. Run QualNet and start the hardware-in-the-loop simulation.

[0112] 3. On LVP-L, use ping to test its connectivity with node 1 in the virtual network. It is found that LVP-L can receive and identify the reply message from virtual node 1. It is shown that the physical interface can not only inject and export real packets into the virtual network, but also perform corresponding analysis work on the packets, so that the real node and the virtual node can interact on the protocol.

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Abstract

The invention relates to a physical accessing method facing QualNet network semi-physical simulation, and belongs to the technical field of network simulation. The physical accessing method supports a tunnel mode and an analyzing mode at the same time. In the tunnel mode, a virtual IP message header is added into a real data package, so that the real data package can be successfully accessed to the virtual network, and the process is concise and effective. In the analyzing mode, interaction of a real node and a virtual node on a network protocol is achieved by a manner that a data package conversion module is introduced into a physical interface, and a network semi-physical simulation system has good expansibility. No change is made on the real node, all functions of the physical interface can be achieved on a simulation server, limitation on the real node is reduced, and use flexibility is improved.

Description

technical field [0001] The invention relates to a physical access method for QualNet network semi-physical simulation, and belongs to the technical field of network simulation. Background technique [0002] In the network hardware-in-the-loop simulation system, the virtual network constructed by the simulation software needs to be interconnected with the real network equipment, and an efficient physical interface is required to realize the association between the two. [0003] The physical experiment method and the software simulation method are generally used in the network research. In the physical experiment method, the experimental object runs on a real physical platform with high precision; however, it is expensive to construct a full-scale physical experimental platform, and it is difficult to carry out a large number of repeated experiments. The software simulation method has good flexibility and controllability, but it cannot directly display the actual performance ...

Claims

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Application Information

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IPC IPC(8): H04L29/06
Inventor 栗苹龚鹏孔杰军李廷震赵凤俊
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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