【摘要】：隨著航天技術(shù)的發(fā)展,人類對于外層空間的探測范圍也在不斷地擴大,同時深空通信也面臨著更大的挑戰(zhàn)。由于深空探測存在高風(fēng)險和高成本等特點,因此研究者在通信方案具體實施之前必須對方案的可行性進行嚴(yán)密論證。作為論證協(xié)議與方案可行性重要手段的計算機仿真已經(jīng)可以對空間通信的方案進行部分模擬。但是相比于深空通信技術(shù)的發(fā)展速度,深空通信方面的計算機仿真技術(shù)的發(fā)展速度明顯滯后。大部分仿真軟件無法精確模擬深空環(huán)境,同時也無法實現(xiàn)協(xié)議的定制化開發(fā)。為了彌補現(xiàn)有仿真軟件的不足,本文擬設(shè)計一套能夠真實模擬深空通信環(huán)境、支持自由定制仿真場景與協(xié)議、伸縮性和可復(fù)用性較強的深空通信仿真平臺。該平臺應(yīng)用組件式開發(fā)技術(shù),將OSGI(Open Service Gateway Initiative,開放服務(wù)網(wǎng)關(guān))作為整個平臺運行的基礎(chǔ)。該規(guī)范也是組件化技術(shù)的標(biāo)準(zhǔn)開發(fā)規(guī)范。該規(guī)范使得整個仿真平臺具有穩(wěn)定和高效的特點。同時,通過對深空通信協(xié)議的總結(jié)和歸納,本文設(shè)計并實現(xiàn)了基于離散事件的通信仿真框架。相比于其它仿真框架,該框架仿真精度和運行效率更高。本文通過與衛(wèi)星工具包(Satellite Tool Kit,STK)進行交互去實現(xiàn)深空仿真場景的創(chuàng)建工作。搭建出來的仿真場景能夠真實反映深空環(huán)境的長時延、高誤碼率以及鏈路周期性頻繁中斷等特性。最后,為了驗證仿真平臺的可靠性,本文以地火通信和圖像文件傳輸為背景,選擇不同仿真場景、不同中繼方案的延時型CCSDS文件傳輸協(xié)議(CCSDS File Delivery Protocol,CFDP)協(xié)議作為驗證對象。本文從文件傳輸?shù)慕嵌葘ζ脚_的運行結(jié)果進行展示,并從系統(tǒng)有效性的角度對協(xié)議仿真結(jié)果與理論計算值進行比較,證明了本文設(shè)計仿真平臺能夠完成仿真深空網(wǎng)絡(luò)協(xié)議的功能。
[Abstract]:With the development of space technology, the exploration range of outer space is expanding, and the deep space communication is facing more challenges. Because of the characteristics of high risk and high cost in deep space exploration, researchers must demonstrate the feasibility of the scheme before it is implemented. Computer simulation, which is an important means to demonstrate the feasibility of the protocol and scheme, can be used to simulate the scheme of space communication. But compared with the development speed of deep space communication technology, the development speed of computer simulation technology in deep space communication obviously lags behind. Most simulation software can not accurately simulate the deep space environment, but also can not achieve customized protocol development. In order to make up for the deficiency of the existing simulation software, this paper intends to design a set of deep space communication simulation platform which can simulate the deep space communication environment, support the free customization of simulation scenarios and protocols, and have strong scalability and reusability. The platform uses component development technology and takes OSGI (Open Service Gateway Initiative, Open Service Gateway as the basis of the whole platform. This specification is also the standard development specification of component technology. This specification makes the whole simulation platform stable and efficient. At the same time, the communication simulation framework based on discrete events is designed and implemented by summarizing and summarizing the deep space communication protocols. Compared with other simulation frameworks, the simulation accuracy and efficiency of the framework are higher. This paper interacts with (Satellite Tool Kit,STK to realize the creation of deep space simulation scene. The simulation scene can truly reflect the characteristics of long delay, high bit error rate and periodic frequent interruption of the link in the deep space environment. Finally, in order to verify the reliability of the simulation platform, this paper takes the ground fire communication and image file transmission as the background, and selects the delay CCSDS file transfer protocol (CCSDS File Delivery Protocol,CFDP) protocol of different simulation scenarios and different relay schemes as the verification object. This paper presents the results of the platform from the point of view of file transfer, and compares the protocol simulation results with the theoretical results from the point of view of system effectiveness. It is proved that the simulation platform designed in this paper can accomplish the function of simulating the deep space network protocol.
【學(xué)位授予單位】：哈爾濱工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TN927

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本文編號：2261482