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首页> 外文学位 >Directional cell breathing---A framework for congestion control and load balancing in broadband wireless networks.
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Directional cell breathing---A framework for congestion control and load balancing in broadband wireless networks.

机译：定向小区呼吸-宽带无线网络中用于拥塞控制和负载平衡的框架。

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摘要

Despite the tremendous bandwidth increase in 3rd generation (3G) Broadband Wireless Networks (BWNs ) such as Universal Mobile Telecommunication System (UMTS ), maintaining the mobile users' Quality of Service ( QoS) requirements while maximizing the network operators' revenues is still a challenging issue. Moreover, spatial distribution of network traffic has a negative impact on the overall network performance where network resources are overutilized in parts of the network coverage area while such resources are underutilized in other network coverage areas. Therefore, network congestion and traffic imbalance become inevitable. Hence, efficient Radio Resource Management (RRM) techniques which release congestion and balance network traffic are of utmost need for the success of such wireless cellular systems. Congestion control and load balancing in BWNs are, however, challenging tasks due to the complexity of these systems and the multiple dimensions that need to be taken into consideration. Examples of such issues include the diverse QoS requirements of the supported multimedia services, the interference level in the system, which vary the mobile users and base stations allocated transmission powers and transmission rates to guarantee certain QoS levels during the lifetime of mobile users connections.;In this thesis, we address the problem of congestion control and load balancing in BWNs and propose efficient network coverage adaptation solution in order to deal with these issues, and hence enhance the QoS support in these systems. Specifically, we propose a directional coverage adaptation framework for BWNs. The framework is designed to dynamically vary the coverage level of network cells to release system congestion and balance traffic load by forcing mobile users handoff from a loaded cell to its nearby lightly loaded cell. The framework consists of three related components, namely directional coverage adaptation module, congestion control and load balancing protocol, and QoS provisioning module. These components interact with each other to release system congestion, balance network load, maximize network resource utilization, while maintaining the required QoS parameters for individual mobile users.
机译：尽管诸如通用移动电信系统（UMTS）之类的第三代（3G）宽带无线网络（BWN）极大地增加了带宽，但是在保持移动用户的服务质量（QoS）要求的同时最大程度地提高网络运营商的收入仍然是一个挑战。问题。此外，网络流量的空间分布会对整体网络性能产生负面影响，其中网络资源在部分网络覆盖区域中被过度利用，而此类资源在其他网络覆盖区域中未被充分利用。因此，网络拥塞和流量不平衡变得不可避免。因此，对于这种无线蜂窝系统的成功，最需要释放拥塞并平衡网络业务的有效无线电资源管理（RRM）技术。但是，由于这些系统的复杂性以及需要考虑的多个维度，BWN中的拥塞控制和负载平衡是一项艰巨的任务。此类问题的示例包括所支持的多媒体服务的不同QoS要求，系统中的干扰级别，这会改变移动用户和基站分配的传输功率和传输速率，以在移动用户连接的生命周期内保证某些QoS级别。在本文中，我们解决了BWN中的拥塞控制和负载平衡问题，并提出了有效的网络覆盖自适应解决方案来解决这些问题，从而增强了这些系统中的QoS支持。具体来说，我们提出了针对BWN的定向覆盖适应框架。该框架旨在通过强制移动用户从负载小区切换到附近的负载较轻的小区，来动态改变网络小区的覆盖级别，以释放系统拥塞并平衡流量负载。该框架由三个相关组件组成，即方向性覆盖适配模块，拥塞控制和负载平衡协议以及QoS设置模块。这些组件相互交互以释放系统拥塞，平衡网络负载，最大程度地利用网络资源，同时保持各个移动用户所需的QoS参数。

著录项

  • 作者

    Ali, Khaled Amer Ahmed.;

  • 作者单位

    Queen's University (Canada).;

  • 授予单位 Queen's University (Canada).;
  • 学科 Engineering Electronics and Electrical.
  • 学位 Ph.D.
  • 年度 2009
  • 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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