本文選題：衛(wèi)星網(wǎng)絡　切入點：動態(tài)路由　出處：《北京郵電大學》2015年碩士論文

【摘要】：衛(wèi)星網(wǎng)絡覆蓋區(qū)域廣,并且?guī)缀醪皇苤朴谖恢靡蛩亍Ｆ湟蜒杆侔l(fā)展成為現(xiàn)代通信中的研究熱點,同時,高帶寬和高速率正成為其發(fā)展方向。路由技術是衛(wèi)星網(wǎng)絡組網(wǎng)的核心,嚴重影響整個衛(wèi)星網(wǎng)絡的效率和可靠性,而衛(wèi)星星座是路由實施的基礎。本文主要針對衛(wèi)星網(wǎng)絡動態(tài)路由組網(wǎng)技術開展研究。首先在研究衛(wèi)星網(wǎng)絡星座設計的基礎上,設計了兩種實現(xiàn)全球覆蓋的LEO星座系統(tǒng),為路由技術的研究提供有力支撐。其次分析了衛(wèi)星網(wǎng)絡中的QoS問題,根據(jù)業(yè)務特點建立了多QoS目標最優(yōu)化路由模型。最后以無線自組織網(wǎng)中廣泛使用的按需路由為核心,結合跨層優(yōu)化策略,提出了一種多QoS目標優(yōu)化的跨層按需動態(tài)路由算法。本文的主要創(chuàng)新點和工作如下：1.設計了兩種實現(xiàn)全球覆蓋的LEO星座系統(tǒng)。從為路由技術的實施提供實驗星座的角度出發(fā),確立了實驗星座的四點設計目標。然后利用數(shù)學解析法和仿真對比法,設計了兩種LEO星座：極軌道星座和傾斜軌道星座。并與銥星星座就覆蓋性能進行了對比,仿真結果表明兩種星座都有更好的覆蓋性能,為之后路由技術的研究提供了有力保障。2.根據(jù)業(yè)務特點建立了多QoS目標最優(yōu)化路由模型。分析了衛(wèi)星網(wǎng)絡中的QoS問題,結合視頻會議業(yè)務低時延、高帶寬的要求,構造了同時對時延、帶寬和誤碼率進行約束的最優(yōu)化路由模型。3.提出了一種多QoS目標優(yōu)化的跨層按需動態(tài)路由算法。引入無線自組織網(wǎng)中的按需路由思想,利用按需路由的路由發(fā)現(xiàn)過程和跨層優(yōu)化策略求解最優(yōu)化路由模型,得到最優(yōu)路徑。仿真結果表明本文所提算法是一個高效可靠的路由算法,能夠保證LEO衛(wèi)星網(wǎng)絡數(shù)據(jù)傳輸?shù)臅r效性和可靠性。
[Abstract]:Satellite network covers a wide area and is hardly restricted by location factors. It has rapidly developed into a research hotspot in modern communications, while high bandwidth and high speed are becoming the development direction of satellite network. Routing technology is the core of satellite network. The efficiency and reliability of the whole satellite network are seriously affected, and satellite constellation is the basis of routing implementation. This paper mainly focuses on the dynamic routing network technology of satellite network. Firstly, based on the research of satellite network constellation design, This paper designs two kinds of LEO constellation systems to realize global coverage, which provide strong support for the research of routing technology. Secondly, the QoS problem in satellite network is analyzed. According to the characteristics of service, the multi-objective routing model of QoS is established. Finally, the on-demand routing, which is widely used in wireless ad hoc networks, is taken as the core, and the cross-layer optimization strategy is combined. This paper presents a cross-layer dynamic routing algorithm for multi-layer QoS optimization. The main innovation and work of this paper are as follows: 1. Two global coverage LEO constellation systems are designed. From the point of view of providing experimental constellations for the implementation of routing technology, The four-point design goal of experimental constellation is established. Then two kinds of LEO constellations, polar orbit constellation and inclined orbit constellation, are designed by means of mathematical analytic method and simulation comparison method, and the coverage performance of these constellations is compared with that of Iridium constellation. The simulation results show that both constellations have better coverage performance, which provides a strong guarantee for the later research of routing technology. According to the characteristics of the traffic, a multi-objective routing model is established. The QoS problem in satellite networks is analyzed. Combined with the requirement of low delay and high bandwidth of video conference service, the simultaneous delay is constructed. Bandwidth and bit error rate (BER) constrained optimal routing model. 3. A cross-layer dynamic routing algorithm based on multi-layer QoS optimization is proposed. The idea of on-demand routing in wireless ad hoc networks is introduced. The optimal routing model is obtained by using the route discovery process of on-demand routing and cross-layer optimization strategy. The simulation results show that the proposed algorithm is an efficient and reliable routing algorithm. It can ensure the timeliness and reliability of LEO satellite network data transmission.
【學位授予單位】：北京郵電大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TN927.2

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本文編號：1672160