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A Mobile Gnutella-based Network System to Support the Distributed Collaborative Virtual Environment.

机译：基于移动Gnutella的网络系统，可支持分布式协作虚拟环境。

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摘要

Collaborative Virtual Environments (CVEs), such as military training simulations, emergency preparedness exercises, and online games have made a considerable impact on both commercial and academic fields over the last few years. Due to the rapidly increasing usage of personal mobile devices and the need of executing CVE applications in environments that have no previous network infrastructure, Mobile Collaborative Virtual Environments (MCVEs) will become ubiquitous in the future. In such systems, users will share a 3D virtual environment through their mobile devices in an ad-hoc network (MANET) in order to accomplish specific missions. We aspire to develop and deploy CVEs over MANETs using the peer-to-peer model. Both peer-to-peer networks and MANETs exhibit the same features; which include complete decentralization, self-configuration, and self-healing. However, peer-to-peer networks and MANETs operate on different network layers, and may introduce poor performance. Mobile ad-hoc and peer-to-peer networks drive the future of CVEs, and thus form the foundation for this thesis.;Most existing CVE systems are tuned to specific tasks, and their architectures are typically tightly coupled with wired networks and desktop settings, therefore they are not adequate enough for addressing mobile collaborative virtual environments. The evolutionary step in MCVE applications is handling the mobility effect in all its forms, and tackling the poor performance of the ad-hoc network. In this thesis, we explain the main networking issues involved in building scalable MCVEs, and review the most well-known CVE and peer-to-peer systems. We then present a mobility-aware cross-layer approach for MCVE applications; this approach relies on building a dynamic multi-tier overlay network architecture-based Gnutella network. The proposed overlay network will manage mobile devices using a novel rule-based discovery technique, in which users are discovered by their virtual environment interest and proximity. With the help of a caching mechanism and a Gnutella Ultrapeer System to perform a dynamic Ultrapeer selection, we were able to outperform traditional mobile overlay networks, as shown in our simulation results.
机译：在过去的几年中，协同虚拟环境（CVE），例如军事训练模拟，应急准备演习和在线游戏，对商业和学术领域都产生了重大影响。由于个人移动设备的使用迅速增加，并且需要在没有以前的网络基础结构的环境中执行CVE应用程序，因此，移动协作虚拟环境（MCVE）将来将变得无处不在。在这样的系统中，用户将通过ad hoc网络（MANET）中的移动设备共享3D虚拟环境，以完成特定任务。我们渴望使用对等模型在MANET上开发和部署CVE。对等网络和MANET都具有相同的功能。其中包括完全分散，自我配置和自我修复。但是，对等网络和MANET在不同的网络层上运行，可能会导致性能下降。移动自组织网络和对等网络驱动了CVE的未来，并因此构成了本文的基础。大多数现有的CVE系统已针对特定任务进行了调整，其体系结构通常与有线网络和桌面设置紧密结合，因此它们不足以解决移动协作虚拟环境。 MCVE应用程序的演进步骤是处理各种形式的移动性影响，并解决ad-hoc网络的不良性能。在本文中，我们解释了构建可伸缩MCVE所涉及的主要网络问题，并回顾了最知名的CVE和对等系统。然后，我们提出了一种针对MCVE应用程序的移动感知跨层方法。这种方法依赖于构建基于动态多层覆盖网络架构的Gnutella网络。提议的覆盖网络将使用一种新颖的基于规则的发现技术来管理移动设备，在该技术中，用户通过其虚拟环境的兴趣和接近程度来进行发现。仿真结果显示，借助缓存机制和Gnutella Ultrapeer系统执行动态Ultrapeer选择，我们能够胜过传统的移动覆盖网络。

著录项

  • 作者

    Zarrad, Anis.;

  • 作者单位

    University of Ottawa (Canada).;

  • 授予单位 University of Ottawa (Canada).;
  • 学科 Computer Science.
  • 学位 Ph.D.
  • 年度 2010
  • 页码 145 p.
  • 总页数 145
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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