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Hierarchical channel-access and routing protocols for heterogeneous multichannel ad hoc networks.

机译：异构多通道自组织网络的分层通道访问和路由协议。

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摘要

In this work, we consider a heterogeneous multichannel ad hoc network consisting of frequency-agile radios with the ability to change their carrier frequency and chip rate over a wide range of possibilities. The radios in this type of network are permitted to utilize multiple non-overlapping channels, and each channel differs significantly in its characteristics such as achievable data rate and communication range. A channel-access protocol regulates access to the channels available, and a routing protocol determines how a packet should be forwarded from its source to its destination through the network. The initial focus of this research is on channel-access and routing protocols that are designed to take advantage of the heterogeneous channels available to a network of frequency-agile radios.;We develop a new approach to channel access that accounts for the heterogeneous nature of the channels available to the network. For this protocol, we designate one channel as the control channel, and terminals communicate on this channel to reserve access for one of the remaining traffic channels. The determination of the traffic channel selected for the data packet transmission is based on the characteristics of the traffic channels available to the network. We compare the performance of this protocol with previously-developed channel-access protocols and show that our new protocol is able to adapt to a wide variety of scenarios without requiring the parameters of the routing protocol to be carefully tuned.;For our routing protocol, a channel metric is used to characterize the traffic channels available for the link between a pair of terminals. We develop a new channel metric that characterizes a channel based on its characteristics and the characteristics of the particular network. This channel metric is used to assign a link resistance value for a link, and these link resistances are utilized by the routing protocol to determine routes. Our new channel-access protocol is modified to employ this channel metric such that the selection of a traffic channel for a data packet transmission considers the current network conditions in addition to the characteristics of the available channels. Results show that our new jointly-designed channel-access and routing protocol provides good network-layer performance for various network scenarios when compared to combinations of previously-developed channel-access and routing protocols.;Lastly, we investigate the selection of backbone terminals for a hierarchical and heterogeneous multichannel ad hoc network. In this network, a subset of the terminals form a backbone network and communicate with one another on a reserved traffic channel employing schedule-based access. The remaining terminals associate with a backbone terminal and communicate on the remaining traffic channels employing contention-based access. We present a centralized algorithm that selects the terminals forming the backbone network. This algorithm demonstrates that network-layer performance is highly dependent on how many terminals are included in the backbone and the selection of the channel utilized for the backbone network.
机译：在这项工作中，我们考虑一个由频率捷变无线电组成的异构多信道ad hoc网络，该无线电能够在多种可能性中改变其载波频率和码片速率。允许这种类型的网络中的无线电使用多个不重叠的信道，并且每个信道在其特性（例如可达到的数据速率和通信范围）上都有很大不同。通道访问协议调节对可用通道的访问，路由协议确定如何通过网络将数据包从其源转发到其目的地。这项研究的最初重点是信道访问和路由协议，这些协议旨在利用可用于频率捷变无线电网络的异构信道。我们开发了一种新的信道访问方法，该方法考虑了信道的异构性质。网络可用的渠道。对于此协议，我们将一个信道指定为控制信道，并且终端在该信道上进行通信以保留对其余业务信道之一的访问。为数据分组传输选择的业务信道的确定基于网络可用的业务信道的特性。我们将该协议的性能与以前开发的信道访问协议进行了比较，结果表明我们的新协议能够适应多种情况，而无需仔细调整路由协议的参数。信道度量用于表征可用于一对终端之间的链路的业务信道。我们开发了一种新的信道度量，可以基于信道的特征和特定网络的特征来表征信道。此通道度量用于分配链路的链路电阻值，并且路由协议将这些链路电阻用于确定路由。我们对新的信道访问协议进行了修改，以采用此信道度量标准，以便为数据包传输选择业务信道时，除了可用信道的特性外，还要考虑当前的网络状况。结果表明，与之前开发的通道访问和路由协议的组合相比，我们新设计的通道访问和路由协议共同提供了良好的网络层性能;最后，我们研究了骨干终端的选择分层的异构多通道ad hoc网络。在该网络中，终端的子集形成骨干网络，并在采用基于调度的访问的预留业务信道上相互通信。其余终端与骨干终端关联，并使用基于竞争的访问在其余业务信道上进行通信。我们提出了一种集中算法，该算法选择形成骨干网的终端。该算法表明，网络层性能高度依赖于骨干网中包含多少个终端以及用于骨干网的信道的选择。

著录项

  • 作者

    Jackson, Crystal Alicia.;

  • 作者单位

    Clemson University.;

  • 授予单位 Clemson University.;
  • 学科 Engineering Computer.
  • 学位 Ph.D.
  • 年度 2013
  • 页码 148 p.
  • 总页数 148
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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