A Simulation Method of On-Star Router for 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: 2017-06-27
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. Although the equipment development platform is on the PC, the overall framework of the entire communication software does not change during the transplantation process.

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  • A Simulation Method of On-Star Router for Delay Tolerant Network
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  • A Simulation Method of On-Star Router for Delay Tolerant Network

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Embodiment

[0066] The technical solution of the present invention will be described in detail below with reference to the drawings and embodiments.

[0067] Step 1: Modeling and simulation of on-board routers based on OPNET.

[0068] (1) Node domain modeling.

[0069] 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.

[0070] 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. The input and outp...

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Abstract

The present invention proposes an on-board router emulation method of a delay tolerant network, comprising: 1. Combining CCSDS and DTNRG to construct an on-board router model, and verifying feasibility and effectiveness in OPNET; 2. Realizing virtualization based on the SITL interface of OPNET Conversion of data streams and real data streams to verify gateway processing capabilities; 3. Use STK to obtain interstellar and star-to-earth link data in the network topology, and import simulation software to simulate interstellar networks; 4. Delay and error codes for network damage meters rate and other related settings to simulate space links. Therefore, the present invention has the following advantages: the integration of the existing space communication protocol system has proposed the router model on the star, and some preparatory work has been done for the system-level realization of my country's DTN protocol system and even the key technology research of the space information network; the combination of software and hardware is more real The environment of the satellite network is simulated, which is helpful to verify the applicability of the on-board router to the space environment.

Description

Technical field [0001] The invention belongs to the two major fields of satellite network technology and computer technology, and specifically relates to a method for simulation of a router on a satellite of a delay tolerable network. Background technique [0002] At present, my country's aerospace industry has entered a period of rapid development. The number and types of spacecraft 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 advantage of the terrestrial Internet IP protocol system is that it has high technology maturity, can greatly reduce aerospace costs, and is easy to upgrade. In 2001, the Goddard Space Center of the United States launched a research project ca...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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