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Modeling and analysis of generalized random mobility models for wireless ad hoc networks.

机译：无线ad hoc网络的广义随机移动性模型的建模和分析。

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摘要

In wireless ad hoc networks, the ability to analytically characterize the long-run properties of the mobility profiles of communicating terminals plays a key role in understanding the fundamental network QoS measures such as throughput per source to destination pair, probability of successful transmission, connectivity, etc. Consequently, mobility models that are general enough to capture the major characteristics of a realistic movement profile, and yet are simple enough to mathematically formulate its long-run behavior, are highly crucial for the analytical or simulation based performance modeling of ad hoc networks.;In this dissertation, we propose a generalized random mobility model capable of capturing several realistic mobility scenarios and give a mathematical framework for its exact analysis over one-dimensional and two-dimensional mobility terrains. The model provides the flexibility to capture hotspots where mobiles accumulate with higher probability and spend more time. The selection process of hotspots is random and correlations between the consecutive hotspot decisions can be successfully modeled. Furthermore, the times spent at the destinations can be dependent on the location of destination point, the speed of movement can be a function of distance that is being traveled, and the acceleration characteristics of vehicles can be incorporated into the model. Our solution framework formulates the model as a semi-Markov process using a special discretization technique. We provided long-run location and speed distributions by closed-form expressions for one-dimensional regions (e.g., a highway). From the utilization of the framework to random waypoint mobility model, we derive an approximation to the spatial distribution of terminals over rectangular regions. We validate the accuracy of this approximation via simulation, and by comparing the marginals with proven results for one-dimensional regions point out that it is insensitive to the proportion between dimensions of the terrain. In addition, we establish an example that demonstrates the applicability of the results derived to a scenario where mobile terminals are restricted to move on predefined paths.
机译：在无线自组织网络中，分析通信终端的移动性配置文件的长期属性的能力在理解基本网络QoS度量（例如每个源到目标对的吞吐量，成功传输的概率，连通性，因此，对于自组织网络的基于分析或仿真的性能建模，至关重要的是，其移动性模型足够通用以捕获现实运动曲线的主要特征，但又足够简单以数学方式表述其长期行为，因此至关重要。在本文中，我们提出了一种通用的随机迁移模型，该模型能够捕获几种现实的迁移情况，并为其精确分析一维和二维迁移地形提供了数学框架。该模型提供了捕获热点的灵活性，在这些热点中，移动设备以更高的概率积累并花费更多的时间。热点的选择过程是随机的，连续热点决策之间的相关性可以成功建模。此外，在目的地花费的时间可以取决于目的地点的位置，移动速度可以是行驶距离的函数，并且可以将车辆的加速特性纳入模型中。我们的解决方案框架使用特殊的离散化技术将模型表示为半马尔可夫过程。我们通过一维区域（例如高速公路）的封闭形式表达式提供了长期位置和速度分布。从框架的利用到随机航点移动性模型，我们得出矩形区域上终端的空间分布的近似值。我们通过仿真验证了这种近似的准确性，并通过将边界与一维区域的经验证的结果进行比较，指出边界对地形尺寸之间的比例不敏感。此外，我们建立了一个示例，演示了将结果应用于在移动终端被限制在预定义路径上移动的情况下的适用性。

著录项

  • 作者

    Alparslan, Denizhan N.;

  • 作者单位

    University of Missouri - Kansas City.;

  • 授予单位 University of Missouri - Kansas City.;
  • 学科 Computer Science.
  • 学位 Ph.D.
  • 年度 2005
  • 页码 124 p.
  • 总页数 124
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 自动化技术、计算机技术;
  • 关键词

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