On-board router simulation method of delay-tolerant network

A simulation method and network-tolerant technology, applied in satellite network technology and computer field, can solve problems such as long simulation period

Active Publication Date: 2014-05-28
WUHAN UNIV
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Problems solved by technology

This method can simulate the space network more realistically, but the simulation cycle is very long, which is close to the verification test system on the ground. Al

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  • On-board router simulation method of delay-tolerant network
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  • On-board router simulation method of delay-tolerant network

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[0066] Examples:

[0067] The technical solution of the present invention will be described in detail below with reference to the drawings and embodiments.

[0068] Step 1: Modeling and simulation of on-board routers based on OPNET.

[0069] (1) Node domain modeling.

[0070] The job of the node domain is to define the internal structure of the node. In OPNET, such as figure 1 The protocol architecture shown. An additional Bundle layer is added between the transport layer and the application layer. The transport layer adaptively selects the SCPS-TP or UDP protocol, and the link layer uses the IP OVER CCSDS AOS architecture. In space communication, there is generally no need to consider the complex situation of application layer gateways.

[0071] In the node model, the blocks that are connected to each other to form the node model become modules. Each module contains a set of inputs and outputs, state memory, and functions that calculate output based on the inputs and state memory. ...

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Abstract

The invention provides an on-board router simulation method of a delay-tolerant network. The on-board router simulation method of the delay-tolerant network comprises the steps that (1) an on-board router model is constructed by combining a CCSDS and a DTNRG, and feasibility and validity verification is conducted in an OPNET; (2) conversion between a virtual data stream and a real data stream is achieved based on an SITL interface of the OPNET, and the processing capacity of a gateway is verified; (3) relevant inter-satellite and satellite-to-ground data in a network topology are obtained through an STK and are introduced into simulation software for simulation of an inter-planetary network; (4) relevant settings such as the delay and the error rate are conducted on a network damage instrument, and a spatial link is simulated. The on-board router simulation method of the delay-tolerant network has the advantages that the on-board router model is provided by organizing existing space communication protocol systems, and preparation is made for realizing a DTN protocol system in China and studying the key technology of a spatial information network; due to the combination of software and hardware, real simulation of the environment of a satellite network is achieved, and the adaptability of an on-board router to the spatial environment can be verified easily.

Description

[0001] technical field [0002] The invention belongs to the two fields of satellite network technology and computer technology, and specifically relates to a method for simulating an on-board router of a delay-tolerant network. Background technique [0003] At present, my country's aerospace industry has entered a period of rapid development. The number and types of space vehicles launched by my country have increased to a large extent compared with the past. The rapid development of aerospace technology and space applications has put forward an urgent need for space network research. The great success of the terrestrial Internet makes people naturally think of moving the working mode of the terrestrial Internet to the space network. The advantages of the terrestrial Internet IP protocol system are high technical maturity, greatly reduced space cost, and easy upgrade. In 2001, the Goddard Space Center of the United States launched a research project named OMNI [1], which ma...

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Application Information

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IPC IPC(8): H04L12/24H04L12/46H04L12/775H04L45/58
Inventor 吴静江昊周建国李勇台啸罗威
Owner WUHAN UNIV
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