卫星网络动态路由组网技术研究

发布时间：2018-03-27 15:43

本文选题：卫星网络　切入点：动态路由　出处：《北京邮电大学》2015年硕士论文

【摘要】：卫星网络覆盖区域广,并且几乎不受制于位置因素。其已迅速发展成为现代通信中的研究热点,同时,高带宽和高速率正成为其发展方向。路由技术是卫星网络组网的核心,严重影响整个卫星网络的效率和可靠性,而卫星星座是路由实施的基础。本文主要针对卫星网络动态路由组网技术开展研究。首先在研究卫星网络星座设计的基础上,设计了两种实现全球覆盖的LEO星座系统,为路由技术的研究提供有力支撑。其次分析了卫星网络中的QoS问题,根据业务特点建立了多QoS目标最优化路由模型。最后以无线自组织网中广泛使用的按需路由为核心,结合跨层优化策略,提出了一种多QoS目标优化的跨层按需动态路由算法。本文的主要创新点和工作如下：1.设计了两种实现全球覆盖的LEO星座系统。从为路由技术的实施提供实验星座的角度出发,确立了实验星座的四点设计目标。然后利用数学解析法和仿真对比法,设计了两种LEO星座：极轨道星座和倾斜轨道星座。并与铱星星座就覆盖性能进行了对比,仿真结果表明两种星座都有更好的覆盖性能,为之后路由技术的研究提供了有力保障。2.根据业务特点建立了多QoS目标最优化路由模型。分析了卫星网络中的QoS问题,结合视频会议业务低时延、高带宽的要求,构造了同时对时延、带宽和误码率进行约束的最优化路由模型。3.提出了一种多QoS目标优化的跨层按需动态路由算法。引入无线自组织网中的按需路由思想,利用按需路由的路由发现过程和跨层优化策略求解最优化路由模型,得到最优路径。仿真结果表明本文所提算法是一个高效可靠的路由算法,能够保证LEO卫星网络数据传输的时效性和可靠性。
[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.
【学位授予单位】：北京邮电大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN927.2

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