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Physical, medium access and routing based cross-layer control using directional antennas and multi-rate radios in wireless ad hoc networks.

机译：无线ad hoc网络中使用定向天线和多速率无线电的基于物理，介质访问和路由的跨层控制。

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摘要

Ad hoc wireless networks have been widely studied over the past several years. It has been proposed to upgrade the performance behavior of ad hoc wireless networks through the use of physical layer technology advancements, such as directional antennas and multi-rate radios. However, the superior capabilities of directional antennas and multi-rate radios can be fully exploited only through appropriately designed higher layer network protocols, particularly at the MAC (Medium Access Control) layer and at the routing layer that are directly on top of PHY (physical) layer. In the first part of this dissertation, we investigate the throughput performance of MAC schemes, through the use of beamforming directional antennas, to achieve better bandwidth utilization. In the second part of this dissertation, we develop cross-layer mechanisms, explore the impact of multi-rate cross layer operations on the throughput efficiency of the network and investigate key cross-layer issues involving combined adaptations across the physical, link, and network layers.;In Chapters 2 and 3, we present and analyze random access and CSMA/CA MAC schemes that are combined with the use of directional transmitter beamforming - the directional-ALOHA and directional-CSMA algorithm. We present a separation property result that allows us to express the network throughput performance as a product of a stationary factor and a mobility factor that embeds the user mobility and location update processes in expressing the level of throughput degradation caused due to location update errors. We show that the presented protocols provide a significant upgrade of network performance when the transmitting nodes adapt their beamwidths in accordance with our presented control scheme.;In Chapters 4 and 5, we develop cross layer schemes and investigate the impact of such multi-rate combined with adaptive packet forwarding and routing operations. We consider the use of random access as well as CSMA/CA MAC protocols in datagram based networks. We employ the link transport throughput capacity measure as a key metric for the joint selection of the physical layer data rate and of the route's next hop. Our results demonstrate the effectiveness of the involved link transport capacity measure and the precision of our analytical modeling.
机译：在过去的几年中，对Ad hoc无线网络进行了广泛的研究。已经提出了通过使用物理层技术进步来升级自组织无线网络的性能行为的技术进步，例如定向天线和多速率无线电。但是，只有通过适当设计的高层网络协议，才能充分利用定向天线和多速率无线电的超强功能，尤其是在PHY（物理）顶层的MAC（介质访问控制）层和路由层上）层。在本文的第一部分，我们通过使用波束成形定向天线来研究MAC方案的吞吐量性能，以实现更好的带宽利用率。在本文的第二部分，我们开发了跨层机制，探讨了多速率跨层操作对网络吞吐效率的影响，并研究了涉及跨物理，链路和网络的组合适应的关键跨层问题。在第2章和第3章中，我们介绍并分析了随机接入和CSMA / CA MAC方案，这些方案与使用定向发射机波束成形-定向ALOHA和定向CSMA算法相结合。我们提出了一种分离属性结果，该结果使我们可以将网络吞吐量性能表示为固定因子和移动性因子的乘积，该因子嵌入用户移动性和位置更新过程，以表达由于位置更新错误而导致的吞吐量降低。当传输节点按照我们提出的控制方案调整其波束宽度时，我们证明了所提出的协议可以显着提升网络性能。在第4章和第5章中，我们开发了跨层方案并研究了这种多速率组合的影响具有自适应的数据包转发和路由操作。我们考虑在基于数据报的网络中使用随机访问以及CSMA / CA MAC协议。我们采用链路传输吞吐能力度量作为联合选择物理层数据速率和路由下一跳的关键指标。我们的结果证明了所涉及的链路传输能力度量的有效性以及我们的分析模型的精度。

著录项

  • 作者

    Hsu, Ju-Lan.;

  • 作者单位

    University of California, Los Angeles.;

  • 授予单位 University of California, Los Angeles.;
  • 学科 Engineering Electronics and Electrical.
  • 学位 Ph.D.
  • 年度 2008
  • 页码 191 p.
  • 总页数 191
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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