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System performance analysis of ad hoc wireless networks.

机译：Ad hoc无线网络的系统性能分析。

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摘要

Wireless networks, and in particular, ad hoc wireless networks, represent a rapidly emerging area of growth and importance in the communication industry which has attracted much attention in recent years. Wireless networks consist of a number of nodes which communicate with each other using high-frequency radio waves. Some of these networks have a wired backbone connected to base stations with only the last hop being wireless. Cellular telephone networks and WI-FI networks (802.11) are examples of this. Ad hoc networks are another type of wireless networks. They are formed by a collection of nodes without the aid of any base stations. Since there are no base stations to route data through, the data needs to be routed to the destination by using the nodes. Ad hoc networks have many attractive qualities such as ease of deployment and flexibility. It is necessary to know their potentials and limitations in order to make the future design more efficient and avoid trying to do the impossible/impractical.;However, a lack of base stations results in difficulties in modelling the performance of such networks. There have been some investigations into the performance of ad hoc networks. Several areas that have not been considered are investigated. The effects of node density and system bandwidth is explored. It is shown that the performance of an ad hoc network can vary between two regimes depending on the bandwidth and density of the nodes. Many network models assume a uniform distribution of nodes. The effects of non-uniformity (clustering) are also studied. It is shown that clustering introduces two regimes on throughput performance which depends on the size of the network. Finally, the performance of an ad hoc network utilizing directional antennas is investigated. It is shown that a large increase in performance can be obtained. This performance increase can counteract the interference-related performance degradation of ad hoc networks for network sizes with thousands of nodes.
机译：无线网络，尤其是自组织无线网络，代表着通信行业中迅速发展的增长和重要性领域，近年来引起了人们的广泛关注。无线网络由多个节点组成，这些节点使用高频无线电波相互通信。这些网络中的一些具有连接到基站的有线骨干网，只有最后一跳是无线的。蜂窝电话网络和WI-FI网络（802.11）就是这样的示例。自组织网络是另一种无线网络。它们由节点集合组成，无需任何基站的帮助。由于没有基站可以路由数据，因此需要使用节点将数据路由到目的地。 Ad hoc网络具有许多吸引人的品质，例如易于部署和灵活性。有必要知道它们的潜力和局限性，以使未来的设计更有效率，并避免尝试做不可能/不切实际的事情。然而，缺少基站会导致对此类网络的性能建模造成困难。已经对自组织网络的性能进行了一些调查。调查了几个尚未考虑的领域。探索了节点密度和系统带宽的影响。结果表明，根据节点的带宽和密度，自组织网络的性能可以在两种状态之间变化。许多网络模型都假定节点是均匀分布的。还研究了非均匀性（聚类）的影响。结果表明，集群在吞吐量性能方面引入了两种机制，这取决于网络的大小。最后，研究了利用定向天线的自组织网络的性能。结果表明，可以大大提高性能。对于具有数千个节点的网络大小，此性能提高可以抵消ad hoc网络与干扰相关的性能下降。

著录项

  • 作者

    Safi, Danny M.;

  • 作者单位

    Lehigh University.;

  • 授予单位 Lehigh University.;
  • 学科 Engineering Electronics and Electrical.
  • 学位 Ph.D.
  • 年度 2009
  • 页码 101 p.
  • 总页数 101
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 无线电电子学、电信技术;
  • 关键词

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