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Radio resource management in multiservice heterogeneous wireless networks.

机译：多服务异构无线网络中的无线电资源管理。

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摘要

Mobile user distribution and mobility behaviour vary based on environment types. This results in the temporal and spatially fluctuating traffic demand. To support the unpredictable traffic demand with different quality of service (QoS) requirements in an efficient manner, it is proposed that future generation wireless network architecture will be heterogeneous based. An heterogeneous wireless network (HWN) is formed by the integration of multiple radio access networks that differ by capacity, coverage and cost. However, for a user to gain access to the HWN, selection of the optimum radio access technology (RAT) that achieves the desired service specific QoS with minimum service cost is a major issue. To resolve this issue, this thesis proposes and analyzes initial RAT selection and vertical handoff (VHO) (combinedly referred to as network selection) algorithms, the main mechanisms of common radio resource management (CRRM) for HWNs. The research is performed in the context of wireless local area network (WLAN) micro-cell coverage in the hotspot, overlaid on a macro-cell of wireless wide area network (WWAN).;For efficient resource management in HWNs environment, an understanding of multi-mode user mobility behaviour is paramount. In the thesis, a multi-mode user mobility model is proposed. The thesis presents analysis of the micro-cell and macro-cell boundary crossing probabilities during a call for different types of hotspot topology. The significance of the proposed mobility model is demonstrated through its application in CRRM.;The thesis proposes a mobility adaptive network selection scheme that deals with both real-time (RT) and non-real-time (NRT) service classes. The effectiveness of the network selection scheme in HWNs is assessed analytically using the theory of Markov chains. Finally, an OPNET based HWN simulator is developed to validate the numerical results obtained from analysis.;Numerical and simulation results show that the proposed network selection scheme minimizes the rate of unnecessary vertical handoffs, thereby providing stable communication without degrading call blocking probabilities in all mobility and loading scenarios considered. The proposed scheme also minimizes service cost, which makes this attractive for implementation in HWNs.;The findings from this research will further advance the knowledge towards the commercial deployment and operation of HWNs.
机译：移动用户的分布和移动行为会根据环境类型而有所不同。这导致交通需求在时间和空间上波动。为了以有效的方式支持具有不同服务质量（QoS）要求的不可预测的流量需求，建议下一代无线网络体系结构将基于异构。异构无线网络（HWN）是由多个容量，覆盖范围和成本不同的无线接入网的集成形成的。然而，对于用户获得对HWN的访问而言，选择以最小的服务成本实现期望的服务特定的QoS的最优无线电接入技术（RAT）是主要问题。为了解决这个问题，本文提出并分析了初始RAT选择和垂直切换（VHO）算法（合称为网络选择）算法，这是HWN通用无线电资源管理（CRRM）的主要机制。这项研究是在热点的无线局域网（WLAN）微小区覆盖范围内进行的，该覆盖覆盖在无线广域网（WWAN）的宏小区上;为实现HWNs环境中的有效资源管理，需要了解以下内容：多模式用户移动性行为至关重要。本文提出了一种多模式用户移动性模型。本文提出了在对不同类型的热点拓扑进行呼叫时，微蜂窝和宏蜂窝边界越过概率的分析。通过在CRRM中的应用证明了所提出的移动性模型的重要性。本文提出了一种同时处理实时和非实时服务类的移动性自适应网络选择方案。使用马尔可夫链理论通过分析评估了HWN中网络选择方案的有效性。最后，开发了基于OPNET的HWN仿真器，以验证从分析中获得的数值结果。数值和仿真结果表明，所提出的网络选择方案最大程度地减少了不必要的垂直切换率，从而提供稳定的通信，而不会降低所有移动性中的呼叫阻塞概率和考虑的加载方案。所提出的方案还使服务成本最小化，这使其对于在HWN中实施具有吸引力。

著录项

  • 作者

    Hasib, Abdul.;

  • 作者单位

    University of Calgary (Canada).;

  • 授予单位 University of Calgary (Canada).;
  • 学科 Engineering Electronics and Electrical.
  • 学位 Ph.D.
  • 年度 2008
  • 页码 164 p.
  • 总页数 164
  • 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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