Distributed simulation system for deep space multi-relay satellite communication

Abstract

The invention provides a distributed simulation system for deep space multi-relay satellite communication. The system employs a structure based on a high-level architecture (HLA) standard and has reusability and interoperability; the system can realize data communication among multiple protocols and different simulation system platforms, and solves the problems of incapability of identifying data among the different protocols and non-standardized interfaces of simulation systems; the system can realize real-time and real transmission of each data packet, the transmission effects are obvious, and the performance analysis is high; through externally connected software, real transmission scenes can be simulated, and real-time dynamic communication environment data is provided; through two relay federal members, multiple relays are simulated and multi-node segment data transmission for a deep space DTN is demonstrated, and through multi-relay multi-hop segment transmission, transmission efficiency in a deep space long distance and long time delay environment is improved; and an acquisition scheduling module is taken as a control center of a simulation platform, on one hand, real-time related data of current simulation platform operation is acquired and displayed in real time, and on the other hand, effective analysis can be performed on acquired data, and related decisions are made. The simulation system provided by the invention has three characteristics of interrupted connection, storage forwarding and keep transmission, thereby being well adaptive to the transmission characteristics of a space DTN.

Description

technical field [0001] The invention belongs to the field of deep space communication simulation and relates to a distributed simulation system for deep space multi-relay satellite communication. Background technique [0002] Deep space communication is an important guarantee for the smooth implementation of deep space exploration missions. It faces communication problems that are completely different from traditional ground wireless communication, such as: long transmission distance, large path loss, prolonged transmission time, and frequent link interruptions. [0003] Since deep space exploration experiments are not easy to carry out testing, an excellent simulation platform that can accurately simulate communication links in deep space environments, analyze and test related technologies and theories is a necessary guarantee for the development of deep space communication research. [0004] The following four network emulators are currently more popular: [0005] 1) NS2:...

AI Technical Summary

Problems solved by technology

[0009] Although these four simulation software have excellent simulation performance, there are insurmountable shortcomings when simulating the data communication scheme of deep space exploration:

However, it is purely focused on the emulation of routing

At the same time, real data cannot be transmitted during multi-node simulation

[0013] 4) The ONE network simulator only implements the BP part of the DTN protocol. When performing multi-node simulation, it only transmits virtual data (data information information), which can neither realize real data transmission nor reflect the data flow direction

Although Document 1 mentions that there can be multiple relay star federation members, Document 1 does not show how multiple relay star federation members can realize multi-hop communication simulation based on multiple intermediate satellites

[0016] The path loss caused by ultra-long-distance communication in deep space communication is very large, and the transmission time is prolonged.

Under the existing technical conditions, end-to-end link transmission without relays cannot meet the requirements. The current space DTN network has the characteristics of multiple relays, long delay, frequent interruptions, and file storage and transmission. By using multiple relay nodes, Segmented cooperation to complete data transmission

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