發(fā)布時(shí)間：2018-02-14 06:17

  本文關(guān)鍵詞： 空天地一體化 位置預(yù)測 DTN 數(shù)據(jù)束層 灰色預(yù)測　出處：《電子科技大學(xué)》2016年碩士論文　論文類型：學(xué)位論文

【摘要】：空天地一體化網(wǎng)絡(luò)是一種融合天基、空基、地基網(wǎng)絡(luò),實(shí)現(xiàn)各層次間互連互通的網(wǎng)絡(luò)應(yīng)用場景。其有效的發(fā)展對軍事、民用、空間科學(xué)探索具有極大的推動(dòng)作用,所以空天地一體化網(wǎng)絡(luò)的發(fā)展代表著一個(gè)國家的信息化的進(jìn)步程度。為了應(yīng)對各種環(huán)境條件下的通信局限性,不斷涌現(xiàn)的針對某單一環(huán)境條件下的網(wǎng)絡(luò)架構(gòu)(受限網(wǎng)絡(luò)),獨(dú)立的協(xié)議架構(gòu)為全網(wǎng)的互連、互通提出了挑戰(zhàn)。不同的協(xié)議架構(gòu)往往具有各異的傳輸層以及底層網(wǎng)絡(luò),并且編址方案也難以統(tǒng)一。因此如何實(shí)現(xiàn)各個(gè)獨(dú)立網(wǎng)絡(luò)域之間的互通和有效的路由成為了學(xué)者們研究的熱點(diǎn)。本文結(jié)合具體的網(wǎng)絡(luò)場景(空天地一體化網(wǎng)絡(luò)),借鑒DTN的體系架構(gòu),設(shè)計(jì)了可以覆蓋多種網(wǎng)絡(luò),并能夠在各不同子網(wǎng)域之間傳輸數(shù)據(jù)的空天地一體化網(wǎng)絡(luò)體系架構(gòu)。在協(xié)議架構(gòu)的傳輸層和應(yīng)用層之間實(shí)現(xiàn)了數(shù)據(jù)束層,這種基于存儲(chǔ)-轉(zhuǎn)發(fā)的設(shè)計(jì),最終實(shí)現(xiàn)了數(shù)據(jù)的跨域傳輸,并且屏蔽了底層網(wǎng)絡(luò)的不同。由于空間通信具有頻繁中斷大延遲的物理特點(diǎn),導(dǎo)致傳統(tǒng)的基于通信過程中具有連通圖的路由算法(OLSR,AODV等)無法實(shí)現(xiàn)數(shù)據(jù)的有效轉(zhuǎn)發(fā)。本文提出CGR-EPI的分層路由方案,由數(shù)據(jù)束層的路由協(xié)議在不同網(wǎng)絡(luò)層次選擇合適的路由方式。對全網(wǎng)DTN節(jié)點(diǎn)利用URI方案統(tǒng)一編址,實(shí)現(xiàn)了目的地址的后綁定,解決了DNS在中斷網(wǎng)絡(luò)下無法正常運(yùn)行的缺點(diǎn)。最后鑒于EPI路由算法的網(wǎng)絡(luò)負(fù)載過大容易造成緩存不足等缺點(diǎn),提出了基于灰色預(yù)測的多副本路由算法。利用灰色預(yù)測算法對節(jié)點(diǎn)運(yùn)動(dòng)平面坐標(biāo)系中節(jié)點(diǎn)位置的橫縱坐標(biāo)的下一時(shí)刻值進(jìn)行預(yù)測。經(jīng)過對算法性能仿真和對應(yīng)路由性能仿真,結(jié)果表明經(jīng)過預(yù)測位置的路由算法有效地防止了由于節(jié)點(diǎn)密集時(shí)造成的路由風(fēng)暴,提高了數(shù)據(jù)包到達(dá)率,降低了網(wǎng)絡(luò)負(fù)載。
[Abstract]:The space-earth integrated network is a network application scene that integrates space-based, space-based and ground-based networks and realizes interconnection between different levels. Its effective development has a great impact on the exploration of military, civil and space science. Therefore, the development of the integrated network of space, earth and earth represents the degree of information progress of a country. In order to cope with the limitations of communication under various environmental conditions, The emerging network architecture for a single environment (limited network architecture, independent protocol architecture for the interconnection of the whole network, interworking has posed a challenge. Different protocol architectures often have different transport layer as well as the underlying network. Therefore, how to realize the interworking and effective routing among all independent network domains has become a hot research topic of scholars. This paper combines the specific network scenarios (integrated network of space, earth and earth). Looking at the architecture of DTN, An integrated network architecture, which can cover multiple networks and transmit data between different sub-domains, is designed, and the data bundles layer is implemented between the transport layer and the application layer of the protocol architecture. The design based on storage and forwarding finally realizes the cross-domain transmission of data and shields the differences of the underlying network. Because space communication has the physical characteristics of frequent interruptions and large delays. As a result, the traditional routing algorithm with connected graph in communication process, such as OLSR-AODV, can not effectively forward the data. This paper proposes a hierarchical routing scheme for CGR-EPI. The routing protocol of the data bundle layer selects the appropriate routing methods at different network levels. For the DTN nodes in the whole network, the URI scheme is used to uniformly address the destination address, and the post-binding of the destination address is realized. It resolves the shortcoming that DNS can not run normally under the interrupt network. Finally, considering that the network load of EPI routing algorithm is too large, it is easy to cause the shortage of cache, and so on. This paper presents a multi-replica routing algorithm based on grey prediction, which is used to predict the next moment value of the vertical coordinate of node position in the moving plane coordinate system of nodes. Through the simulation of the algorithm performance and the corresponding routing performance simulation, The results show that the routing algorithm can effectively prevent the routing storm caused by the dense nodes, improve the packet arrival rate and reduce the network load.
【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2016
【分類號】：TN915.04

【參考文獻(xiàn)】

相關(guān)期刊論文 前2條

1 袁基煒;史忠科;;一種基于灰色預(yù)測模型GM(1,1)的運(yùn)動(dòng)車輛跟蹤方法[J];控制與決策;2006年03期

2 金義富;朱慶生;邢永康;;序列缺失數(shù)據(jù)的灰插值推理方法[J];控制與決策;2006年02期

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本文編號：1510067